Wiki source code of 3.4 Protections

Version 42.3 by Admin on 2025/10/14 10:23

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5.1	2	= Configuration =
1.1	3
	4	(% data-numbered-headings-start="4" style="--numbered-headings-start: 3;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
	5	== Protections ==
	6
	7	The BMS Main 3 device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
	8
21.1	9	(% class="box errormessage" %)
18.1	10	(((
	11	Attention!
	12	Behavior of contactors at different errors is configured in corresponding contactor settings!
	13	)))
	14
2.1	15	=== Overcurrent ===
1.1	16
	17	The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
	18
	19	To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
	20
11.2	21	[[image:1735224601506-488.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
1.1	22
	23	In this section:
	24
	25	* Enable – a flag to enable the protection;
	26	* Maximum charging current, А;
	27	* Tolerant charging current, А;
	28	* Maximum discharging current, А;
	29	* Tolerant discharging current, А;
	30	* Delay before setting the error, millisecond;
	31	* Delay before clearing the error, second;
	32	* Lock – a flag to block the error until the device is restarted.
	33
	34	As a result of operation of the overcurrent protection, the "Overcurrent" error is generated.
	35
	36	Error generation conditions:
	37
	38	* the current is positive (charging), and its modulo value is greater than the “Maximum charging current” value for the “Delay before setting the error” time;
	39	* the current is negative (discharging), and its modulo value is greater than the “Maximum discharging current” value for the “Delay before setting the error” time.
	40
	41	Conditions for removing the error:
	42
	43	* the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
	44	* the current is negative (discharging) or zero, and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
	45
6.2	46	=== Charge current limit ===
	47
17.2	48	The BMS Main 3 device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome\|\|anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
6.2	49
16.46	50	Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
16.15	51
16.8	52	To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
16.2	53
16.8	54	[[image:1735225207687-430.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
	55
	56	* Enable – a flag to enable the protection;
18.1	57	* Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
27.2	58	* Region 1: Current difference – a value of maximum absolute current difference, A;
18.1	59	* Region 2: Current difference – a value of maximum relative current excess, A;
	60	* Delay before setting the error, millisecond;
	61	* Delay before clearing the error, second;
	62	* Lock – a flag to block the error until the device is restarted.
16.8	63
6.2	64	=== Discharge current limit ===
	65
17.2	66	The BMS Main 3 device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome\|\|anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
6.2	67
16.47	68	Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
16.44	69
17.2	70	To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
16.44	71
17.2	72	[[image:1735225942893-869.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
	73
	74	In this section:
	75
	76	* Enable – a flag to enable the protection;
18.1	77	* Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
27.2	78	* Region 1: Current difference – a value of maximum absolute current difference, A;
18.1	79	* Region 2: Current difference – a value of maximum relative current excess, A;
	80	* Delay before setting the error, millisecond;
	81	* Delay before clearing the error, second;
	82	* Lock – a flag to block the error until the device is restarted.
17.2	83
2.1	84	=== Undervoltage ===
1.1	85
	86	The BMS Main 3 device implements battery protection from too low voltage on the cells.
	87
	88	To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
	89
8.2	90	[[image:1735224224155-829.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
1.1	91
	92	In this section:
	93
	94	* Enable – a flag to enable the protection;
	95	* Minimum cell voltage, V;
	96	* Tolerant cell voltage, V;
29.1	97	* Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage;
1.1	98	* Delay before setting the error, millisecond;
	99	* Delay before clearing the error, second;
	100	* Lock – a flag to block the error until the device is restarted.
	101
	102	As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
	103
	104	Error generation conditions:
	105
	106	* the minimum voltage among all cells of the battery is less than the “Minimum cell voltage” value for the “Delay before setting the error” time.
	107
	108	Conditions for removing the error:
	109
	110	* the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
	111
2.1	112	=== Overvoltage ===
1.1	113
	114	The BMS Main 3 device implements battery protection from too high voltage on the cells.
	115
	116	To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
	117
9.2	118	[[image:1735224377252-473.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
1.1	119
	120	In this section:
	121
	122	* Enable – a flag to enable the protection;
	123	* Maximum cell voltage, V;
	124	* Tolerant cell voltage, V;
29.1	125	* Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage;
1.1	126	* Delay before setting the error, millisecond;
	127	* Delay before clearing the error, second;
	128	* Lock – a flag to block the error until the device is restarted.
	129
	130	As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
	131
	132	Error generation conditions:
	133
	134	* the maximum voltage among all cells of the battery is greater than the “Maximum cell voltage” value for the “Delay before setting the error” time.
	135
	136	Conditions for removing the error:
	137
	138	* the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
	139
42.2	140	=== Cell imbalance ===
	141
42.3	142	The BMS Main 3 device implements battery protection from too much cell imbalance. If balancing algorithm is not enough to compensate battery imbalance, then imbalance protection generates an error
42.2	143
	144	To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
	145
2.1	146	=== Low temperature ===
1.1	147
	148	The BMS Main 3 device implements battery protection from too low temperature.
	149
	150	To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
	151
2.1	152	[[image:1733328382382-670.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
1.1	153
	154	In this section:
	155
	156	* Enable – a flag to enable the protection;
	157	* Minimum charge temperature, °C;
	158	* Tolerant charge temperature, °C;
	159	* Minimum discharge temperature, °C;
	160	* Tolerant discharge temperature, °C;
	161	* Delay before setting the error, millisecond;
	162	* Delay before clearing the error, second;
	163	* Lock – a flag to block the error until the device is restarted.
	164
	165	As a result of the operation of the battery protection from low temperature, the "Low temperature (CH)" and/or “Low temperature (DCH)” error are generated.
	166
	167	Error generation conditions:
	168
	169	* the minimum temperature among all cells of the battery is less than the “Minimum charging (discharging) temperature” value for the “Delay before setting the error” time.
	170
	171	Conditions for removing the error:
	172
	173	* the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
	174
2.1	175	=== High temperature ===
1.1	176
	177	The BMS Main 3 device implements battery protection from too high temperature.
	178
	179	To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
	180
2.1	181	[[image:1733328399408-279.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
1.1	182
	183	In this section:
	184
	185	* Enable – a flag to enable the protection;
	186	* Maximum charge temperature, °C;
	187	* Tolerant charge temperature, °C;
	188	* Maximum discharge temperature, °C;
	189	* Tolerant discharge temperature, °C;
	190	* Delay before setting the error, millisecond;
	191	* Delay before clearing the error, second;
	192	* Lock – a flag to block the error until the device is restarted.
	193
	194	As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
	195
	196	Error generation conditions:
	197
	198	* the maximum temperature among all cells of the battery is greater than the “Maximum charging (discharging) temperature” value for the “Delay before setting the error” time.
	199
	200	Conditions for removing the error:
	201
	202	* the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
	203
2.1	204	=== Battery cover ===
1.1	205
	206	To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
	207
2.1	208	[[image:1733328399410-529.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
1.1	209
	210	In this section:
	211
	212	* Enable – a flag to enable the protection;
	213	* Delay before setting the error, millisecond;
	214	* Delay before clearing the error, second;
	215	* Lock – a flag to block the error until the device is restarted.
	216
	217	As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
	218
	219	Error generation conditions:
	220
	221	* there is a signal from the battery cover during the “Delay before setting the error” time.
	222
	223	Conditions for removing the error:
	224
	225	* no signal from the battery cover during the “Delay before clearing the error” time.
	226
2.1	227	(% class="box warningmessage" %)
	228	(((
18.1	229	If there is the "Battery cover error", the “Critical error” is generated.
2.1	230	)))
1.1	231
2.1	232	=== High humidity ===
1.1	233
	234	The BMS Main 3 can detect that the battery is operating in high humidity conditions.
	235
	236	To change the detection parameters, select the "Protections → High humidity" section:
	237
2.1	238	[[image:1733328399412-184.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
1.1	239
	240	In this section:
	241
	242	* Enable – a flag to enable the detection;
	243	* Maximum humidity, RH%;
	244	* Tolerant humidity, RH%;
	245	* Delay before setting the error, second;
	246	* Delay before clearing the error, second;
	247	* Lock the error until the device is reset.
	248
	249	As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
	250
	251	Error generation conditions:
	252
	253	* the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
	254
	255	Conditions for removing the error:
	256
	257	* the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
	258
2.1	259	(% class="box infomessage" %)
	260	(((
1.1	261	If there is the "High humidity" error, no action is taken. The error is indicative.
2.1	262	)))
1.1	263
2.1	264	=== Water ===
1.1	265
	266	The BMS Main 3 can protect the battery from working in very high humidity conditions.
	267
	268	To change the protection parameters, select the "Protections → Water" section:
	269
2.1	270	[[image:1733328399413-393.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
1.1	271
	272	In this section:
	273
	274	* Enable – a flag to enable the protection;
	275	* Maximum humidity, RH%;
	276	* Tolerant humidity, RH%;
	277	* Delay before setting the error, second;
	278	* Delay before clearing the error, second;
	279	* Lock – lock the error until the device is reset.
	280
	281	As a result of the operation of the battery protection from water, the "Water" error is generated.
	282
	283	Error generation conditions:
	284
	285	* the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
	286
	287	Conditions for removing the error:
	288
	289	* the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
	290
18.1	291	(% class="box warningmessage" %)
2.1	292	(((
18.1	293	If there is the “Water” error, the “Critical error” is generated.
2.1	294	)))
1.1	295
6.4	296	=== Logic high temperature ===
1.1	297
	298	To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
	299
2.1	300	[[image:1733328399414-280.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
1.1	301
	302	In this section:
	303
	304	* Enable – a flag to enable the protection;
	305	* Maximum temperature, °C;
	306	* Tolerant temperature, °C;
	307	* Delay before setting the error, second;
	308	* Delay before clearing the error, second;
	309	* Lock – lock the error until the device is reset.
	310
	311	As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
	312
	313	Error generation conditions:
	314
	315	* a BMS Logic device temperature is higher than the “Maximum temperature” value.
	316
	317	Conditions for removing the error:
	318
	319	* a BMS Logic device temperature is less than the “Tolerant temperature” value.
	320
4.1	321	(% class="box infomessage" %)
2.1	322	(((
4.1	323	Cell balancing is disabled on Logic devices with high temperature.
2.1	324	)))
1.1	325
2.1	326	=== Logic offline ===
1.1	327
	328	To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
	329
34.1	330	[[image:1755871522789-489.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
1.1	331
34.1	332
1.1	333	In this section:
	334
	335	* Enable – a flag to enable the protection;
34.1	336	* Delay before setting the error, second;
	337	* Delay before clearing the error, second;
1.1	338	* Lock – lock the error until the device is reset.
	339
	340	As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
	341
	342	Error generation conditions:
	343
	344	* at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
	345
	346	Conditions for removing the error:
	347
	348	* all connected BMS Logic devices respond to the commands of the BMS Main device.
	349
2.1	350	(% class="box warningmessage" %)
	351	(((
18.1	352	If there is the "Logic offline" error, the “Critical error” is generated.
2.1	353	)))
	354
	355	=== Cell count ===
	356
	357	To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
	358
	359	[[image:1733328415731-223.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
	360
	361	In this section:
	362
	363	* Enable – a flag to enable the protection;
	364	* Number of cells – a number of cells connected to the BMS;
	365	* Delay before setting the error, millisecond;
	366	* Delay before clearing the error, second;
	367	* Lock – a flag to block the error until the device is restarted.
	368
	369	As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
	370
	371	Error generation conditions:
	372
	373	* the number of cells connected to the BMS is not equal to the “Number of cells” value during the “Delay before setting the error” time.
	374
	375	Conditions for removing the error:
	376
	377	* the number of cells connected to the BMS is equal to the “Number of cells” value during the “Delay before clearing the error” time.
	378
	379	(% class="box warningmessage" %)
	380	(((
18.1	381	If there is the "Cell count error", the “Critical error” is generated.
2.1	382	)))
	383
35.2	384	=== Temperature sensor count ===
	385
	386	To change the protection parameters from the mismatch of the number of temperature sensors to the set value, select the "Protections → Temperature sensor count" section:
	387
	388	[[image:1755871582533-550.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	389
	390	In this section:
	391
	392	* Enable – a flag to enable the protection;
	393	* Number of cells – a number of temperature sensors connected to the BMS;
	394	* Delay before setting the error, millisecond;
	395	* Delay before clearing the error, second;
	396	* Lock – a flag to block the error until the device is restarted.
	397
37.1	398	As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
35.2	399
	400	Error generation conditions:
	401
37.1	402	* the number of temperature sensors connected to the BMS is not equal to the “Number of temperature sensors” value during the “Delay before setting the error” time.
35.2	403
	404	Conditions for removing the error:
	405
37.1	406	* the number of temperature sensors connected to the BMS is equal to the “Number of temperature sensors” value during the “Delay before clearing the error” time.
35.2	407
	408	(% class="box warningmessage" %)
	409	(((
37.1	410	If there is the "T-sensor count error", the “Critical error” is generated.
35.2	411	)))
	412
2.1	413	=== Logic count ===
	414
	415	To change the protection parameters from the mismatch of the number of BMS Logic devices to the set value, select the "Protections → Logic count” section:
	416
	417	[[image:1733328415732-163.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
	418
	419	In this section:
	420
	421	* Enable – a flag to enable the protection;
	422	* Logic count – a number of BMS Logic devices connected to the BMS Main;
	423	* Scan fast – a flag to scan BMS Logic devices fast (devices with addresses from 1 to “Logic count” are scanned; this mode reduces BMS system startup time);
	424	* Lock – lock the error until the device is reset.
	425
	426	As a result of the operation of the protection from the mismatch of the number of BMS Logic devices, the "Logic count error" is generated.
	427
	428	Error generation conditions:
	429
	430	* the number of BMS Logic devices connected to the BMS Main is not equal to the “Logic count” value.
	431
	432	Conditions for removing the error:
	433
	434	* the number of BMS Logic devices connected to the BMS Main is equal to the “Logic count” value.
	435
	436	(% class="box warningmessage" %)
	437	(((
18.1	438	If there is the "Logic count error", the “Critical error” is generated.
2.1	439	)))
	440
	441	=== Short circuit ===
	442
	443	The BMS Main 3 device implements the protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
	444
	445	To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
	446
12.2	447	[[image:1735224667621-969.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
2.1	448
	449	In this section:
	450
	451	* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
	452	** Enable – a flag to enable the protection;
	453	** Maximum current, A;
	454	** Delay before setting the error, second;
	455	* Delay before clearing the error, second;
	456	* Lock – a flag to block the error until the device is restarted.
	457
	458	If there is a short circuit, the "Short circuit" error is generated.
	459
	460	Error generation conditions:
	461
	462	* at any of the three protection levels, the current modulo is greater than the “Maximum current” value during the “Delay before setting the error” time.
	463
	464	Conditions for removing the error:
	465
	466	* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
	467
	468	=== High contactor temperature ===
	469
	470	The BMS Main 3 device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X5 connector is used.
	471
	472	To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
	473
12.2	474	[[image:1735224706573-347.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
2.1	475
	476	In this section:
	477
	478	* Enable – a flag to enable the protection;
	479	* Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
	480	* Maximum contactor temperature, °C;
	481	* Tolerant contactor temperature, °C;
	482	* Delay before setting the error, second;
	483	* Delay before clearing the error, second;
	484	* Lock – a flag to block the error until the device is restarted.
	485
	486	If there is a contactor overheat, the "High contactor temperature" error is generated.
	487
	488	Error generation conditions:
	489
	490	* the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
	491
	492	Conditions for removing the error:
	493
	494	* the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
	495
	496	=== Current sensor ===
	497
	498	The BMS Main 3 device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
	499
	500	To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
	501
	502	[[image:1733328461552-948.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
	503
	504	In this section:
	505
	506	* Enable – a flag to enable the protection;
	507	* Maximum voltage, V;
	508	* Minimum voltage, V;
	509	* Voltage hysteresis – a hysteresis value to clear the error, V;
	510	* Delay before setting the error, second;
	511	* Delay before clearing the error, second;
	512	* Lock – a flag to block the error until the device is restarted.
	513
	514	If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
	515
	516	Error generation conditions:
	517
	518	* the voltage in the signal line or reference line of the current sensor is greater than the “Maximum voltage” value during the “Delay before setting the error” time;
	519	* the voltage in the signal line or reference line of the current sensor is less than the “Minimum voltage” value during the “Delay before setting the error” time.
	520
	521	Conditions for removing the error:
	522
	523	* the voltage in the signal line or reference line of the current sensor is in range from (Minimum voltage + Voltage hysteresis) to (Maximum voltage - Voltage hysteresis) during the “Delay before clearing the error” time.
	524
	525	(% class="box warningmessage" %)
	526	(((
18.1	527	If there is the “Current sensor error”, the “Critical error” is generated.
2.1	528	)))
	529
	530	=== Power switch ===
	531
	532	BMS Main 3 device checks the status of power switches that are used to control the contactors. To change the parameters of the power switch protection, select the "Protections → Power switch" section:
	533
	534	[[image:1733328461554-241.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
	535
	536	In this section:
	537
	538	* Delay before clearing the error, second;
	539	* Lock – a flag to block the error until the device is restarted.
	540
	541	The “Power switch error” occurs when the device detects a shortage in contactor coil control circuit or an overheating of the power switch. Error is removed when the temperature of power switch is normal during “Delay before clearing the error” time.
	542
	543	(% class="box warningmessage" %)
	544	(((
18.1	545	If there is the "Power switch error", the “Critical error” is generated.
2.1	546	)))
	547
22.2	548	=== Power fault ===
	549
22.10	550	BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
22.2	551
23.2	552	(% class="box infomessage" %)
	553	(((
25.1	554	Note: this error can be configured only under "Service" account.
23.2	555	)))
	556
22.10	557	To change the parameters of the power fault error, select the "Protections → Power fault" section:
	558
22.2	559	[[image:1739284154410-676.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
	560
	561	In this section:
	562
25.2	563	* Enable – a flag to enable the protection;
22.2	564	* Delay before setting the error, millisecond;
22.3	565	* Time to keep power off, millisecond;
	566	* Delay before clearing the error, millisecond;
22.2	567	* Lock – a flag to block the error until the device is restarted.
	568
26.1	569	The “Power fault” occurs when the device detects a shortage or high power consumption in power supplies mentioned above. After that BMS turns off the corresponding power supply for "Time to keep power off", then it tries to enable power again.
22.2	570
25.2	571	Error is removed when the power consumption is normal during “Delay before clearing the error” time.
	572
22.2	573	(% class="box warningmessage" %)
	574	(((
23.1	575	If there is the "Power fault", the “Critical error” is generated.
22.2	576	)))
	577
2.1	578	=== Charge contactor cycles ===
	579
	580	The BMS Main 3 device protects the charging contactor against frequent switching.
	581
	582	To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
	583
	584	[[image:1733328461555-351.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
	585
	586	In this section:
	587
	588	* Enable – a flag to enable the protection;
	589	* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
	590	* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
	591	* Delay before setting the error, millisecond;
	592	* Delay before clearing the error, second;
	593	* Lock – a flag to block the error until the device is restarted.
	594
	595	If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
	596
	597	Error generation conditions:
	598
	599	* the number of switching cycles of the charging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	600
	601	Conditions for removing the error:
	602
	603	* the “Delay before clearing the error” time has passed since the error was generated.
	604
3.1	605	=== Discharge contactor cycles ===
2.1	606
	607	The BMS Main 3 device protects the discharging contactor against frequent switching.
	608
	609	To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
	610
	611	[[image:1733328461560-301.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	612
	613	In this section:
	614
	615	* Enable – a flag to enable the protection;
	616	* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
	617	* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
	618	* Delay before setting the error, millisecond;
	619	* Delay before clearing the error, second;
	620	* Lock – a flag to block the error until the device is restarted.
	621
	622	If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
	623
	624	Error generation conditions:
	625
	626	* the number of switching cycles of the discharging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	627
	628	Conditions for removing the error:
	629
	630	* the “Delay before clearing the error” time has passed since the error was generated.
	631
	632	=== Temperature sensors ===
	633
	634	The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
	635
	636	To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
	637
	638	[[image:1733328471918-980.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
	639
	640	In this section:
	641
	642	* Enable – a flag to enable the protection;
	643	* Delay before setting the error, millisecond;
	644	* Delay before clearing the error, second;
	645	* Lock – a flag to block the error until the device is restarted.
	646
	647	If there are no temperature sensors connected to any BMS Logic device or any temperature sensor of the BMS Logic is shorted, the "No temp. sensors" error and "Temp. sensor is shorted" error are generated respectively. These errors generated and removed with the “Delay before setting the error” and “Delay before clearing the error” delays.
	648
	649	(% class="box warningmessage" %)
	650	(((
18.1	651	If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the “Critical error” is generated.
2.1	652	)))
	653
	654	=== WDT reset ===
	655
	656	If the BMS firmware hangs, the watchdog timer resets the device. The BMS can detect that the device was reset and generates the “WDT reset” error.
	657
	658	To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
	659
	660	[[image:1733328471919-183.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
	661
	662	In this section:
	663
	664	* Enable – a flag to enable the protection;
	665	* Delay before clearing the error, second;
	666	* Lock – a flag to block the error until the device is restarted.
	667
	668	Conditions for removing the error:
	669
	670	* the “Delay before clearing the error” time has passed from the device startup.
	671
	672	(% class="box warningmessage" %)
	673	(((
18.1	674	If there is the "WDT reset" error, the “Critical error” is generated.
2.1	675	)))
	676
4.1	677	=== Unallowable charging ===
2.1	678
	679	The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
	680
	681	To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
	682
	683	[[image:1733328471920-923.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
	684
	685	In this section:
	686
	687	* Enable – a flag to enable the protection;
	688	* Delay before setting the error, second;
	689	* Delay before clearing the error, second;
	690	* Lock – a flag to block the error until the device is restarted.
	691
	692	If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
	693
	694	Error generation conditions:
	695
	696	* the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
	697
	698	Conditions for removing the error:
	699
	700	* the battery current is zero during the “Delay before clearing the error” time.
	701
5.1	702	=== Stuck contactor ===
2.1	703
	704	The BMS Main 3 device protects contactors against sticking.
	705
	706	To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
	707
	708	[[image:1733328471920-314.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	709
	710	In this section:
	711
	712	* Enable – a flag to enable the protection;
	713	* Delay before setting the error, millisecond;
	714	* Delay before clearing the error, second;
	715	* Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
	716	* Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
	717	* Lock – a flag to block the error until the device is restarted.
	718
	719	If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
	720
	721	* The charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set or (if “Check voltage” flag is set) “Charging/Discharging” contactor is open and voltage difference before and after contactors is lower than “Abnormal voltage difference”.
	722
	723	(% class="box warningmessage" %)
	724	(((
18.1	725	If there is the “Stuck contactor” error, the “Critical error” is generated.
2.1	726	)))
	727
	728	=== Contactor feedback ===
	729
	730	The BMS Main 3 device can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, the feedback signal must be connected to the corresponding contactor feedback pin on the X3 header.
	731
	732	To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
	733
	734	[[image:1733328487096-144.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
	735
	736	In this section:
	737
	738	* Enable – a flag to enable the protection;
	739	* Delay before setting the error, millisecond;
	740	* Delay before clearing the error, second;
	741	* Lock – a flag to block the error until the device is restarted.
	742
	743	If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
	744
	745	* a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
	746
	747	(% class="box warningmessage" %)
	748	(((
18.1	749	If there is the “Contactor feedback” error, the “Critical error” is generated.
2.1	750	)))
	751
5.1	752	=== Insulation ===
2.1	753
	754	The BMS Main 3 device can detect a physical signal or CAN bus message from an external insulation monitoring device (such as Bender IR155, iso165C, BMD IMD) to monitor the insulation quality.
	755
	756	To change the insulation monitoring parameters, select the "Protections → Insulation" section:
	757
	758	[[image:1733328487098-963.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
	759
	760	In this section:
	761
	762	* Enable – a flag to enable the protection;
	763	* Checking algorithm – isolation checking mode:
	764	** Always on – check is always performed;
	765	** On charging – check is performed only if “Charger connected” or “Charge request” is set;
	766	** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
	767	* Delay before setting the error, second;
	768	* Delay before clearing the error, second;
	769	* Lock – a flag to block the error until the device is restarted.
	770
	771	The “Insulation fault” is set if the “Insulation status” signal is detected during the “Delay before setting the error” time. The “Insulation status” signal can be received through the discrete input or by the CAN bus from an insulation monitoring device. The “Insulation fault” is cleared if the “Insulation status” signal is cleared during the “Delay before clearing the error” time.
	772
	773	(% class="box warningmessage" %)
	774	(((
18.1	775	If there is the “Insulation fault”, the “Critical error” is generated.
2.1	776	)))
	777
	778	=== HVIL ===
	779
	780	The BMS Main 3 allows to control the high voltage interlock loop by applying current to a testing loop and monitoring the difference between the measured current and the required value.
	781
	782	To change the HVIL measurement parameters, select the "Protections → HVIL" section:
	783
13.2	784	[[image:1735224839441-185.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
2.1	785
	786	In this section:
	787
	788	* Enable – a flag to enable the protection;
13.2	789	* Source is OFF: Lower current limit, A;
	790	* Source is OFF: Upper current limit, A;
	791	* Source is ON: Lower current limit, A;
	792	* Source is ON: Upper current limit, A;
2.1	793	* Lock – a flag to block the error until the device is restarted.
	794
26.1	795	If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated.
2.1	796
26.1	797	Error clears if interlock loop is being restored.
	798
2.1	799	(% class="box warningmessage" %)
	800	(((
18.1	801	If there is the “HVIL error”, the “Critical error” is generated.
2.1	802	)))
	803
37.1	804	=== Battery voltage ===
	805
	806	The BMS Main 3 allows to control the difference between sum of all cell voltages and voltage measured before the contactors.
	807
40.1	808	To change the voltage difference check parameters, select the "Protections → Battery voltage" section:
37.1	809
	810	[[image:1755871661259-633.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="100" width="800"]]
	811
	812	In this section:
	813
	814	* Enable – a flag to enable the protection;
	815	* Abnormal voltage difference – a maximum difference between sum of all cell voltages and voltage measured before the contactors (High voltage 1), V;
	816	* Delay before setting the error, second;
	817	* Delay before clearing the error, second;
	818	* Lock – a flag to block the error until the device is restarted.
	819
	820	If there is a mismatch between voltages, "Battery voltage mismatch" error is generated.
	821
	822	Error generation conditions:
	823
	824	* difference between sum of all cell voltages and voltage measured before the contactors is more than "Abnormal voltage difference" value during "Delay before setting the error" time.
	825
	826	Conditions for removing the error:
	827
	828	* difference between sum of all cell voltages and voltage measured before the contactors is less than "Abnormal voltage difference" value during "Delay before clearing the error" time.
	829
38.1	830	(% class="box warningmessage" %)
	831	(((
	832	If there is the “Battery voltage mismatch” error, the “Critical error” is generated.
	833	)))
	834
2.1	835	=== Critical error ===
	836
26.1	837	Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
23.4	838
2.1	839	To change the critical error parameters, select the "Protections → Critical error" section:
	840
	841	[[image:1733328487100-898.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
	842
	843	In this section:
	844
	845	* Enable – a flag to enable the protection;
	846	* Delay before setting the error, millisecond;
	847	* Delay before clearing the error, second;
	848	* Lock – a flag to block the error until the device is restarted.
	849
27.3	850	The "Critical error" signal is generated if at least one of the critical errors (see [[Errors>>doc:Battery management systems.Additional information.1\. Battery controllers\: signals and errors.WebHome\|\|anchor="HErrors"]]) is generated during the “Delay before setting the error” time.
2.1	851
25.1	852	The “Critical error" signal is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
2.1	853
6.1	854	=== General error ===
2.1	855
	856	To change the general error parameters, select the "Protections → Critical error" section:
	857
14.2	858	[[image:1735224942262-497.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
2.1	859
	860	In this section:
	861
	862	* Enable – a flag to enable the protection;
	863	* Delay before setting the error, millisecond;
	864	* Delay before clearing the error, second;
	865	* Lock – a flag to block the error until the device is restarted;
15.1	866	* Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
2.1	867
28.1	868	The “General error”is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
2.1	869
	870	The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
	871
	872	(% class="box infomessage" %)
	873	(((
20.1	874	The state of the “General error” can be assigned to a discrete output or to a power switch.
2.1	875	)))

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