Wiki source code of 3.6 Battery protection

Version 16.1 by Admin on 2024/11/21 18:40

version	line-number	content
1.1	1	The BMS Main 2.x board continuously monitors the state of the cells, BMS Logic boards, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
	2
	3	== 3.6.1 Overcurrent protection ==
	4
	5	To change the current protection of the battery, select the menu "Protections → Overcurrent protection":
2.2	6
2.3	7	[[Overcurrent protection settings>>image:1732211959984-118.png\|\|data-xwiki-image-style-alignment="center" height="266" width="386"]]
	8
4.13	9	In this section:
2.3	10
	11	* Enable – a flag to enable the protection;
	12	* Maximum charging current, А;
	13	* Tolerant charging current, А;
	14	* Maximum discharging current, А;
	15	* Tolerant discharging current, А;
	16	* Delay before setting the error, second;
	17	* Delay before clearing the error, second;
	18	* Lock the error until the device is reset – a flag to block the error until the board is restarted.
	19
	20	As a result of operation of the current protection, the "Overcurrent" error is generated.
	21
	22	Error generation conditions:
	23
	24	* 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;
	25	* 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.
	26
	27	Conditions for removing the error:
	28
	29	* 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;
	30	* the current is negative (discharging), and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
	31
	32	(% class="box infomessage" %)
	33	(((
4.13	34	If there is the "Overcurrent" error, the charging and discharging relay open.
2.3	35	)))
3.2	36
	37	== 3.6.2 Undervoltage protection ==
	38
	39	The board implements battery protection from too low or too high voltage on the cells.
	40
	41	To change the battery protection parameters from low voltage on the cells, select the menu "Protections → Undervoltage protection":
	42
3.3	43	[[Undervoltage protection settings>>image:1732212212350-294.png\|\|data-xwiki-image-style-alignment="center" height="207" width="359"]]
	44
	45	In this section:
	46
	47	* Enable – a flag to enable the protection;
	48	* Minimum cell voltage, V;
	49	* Tolerant cell voltage, V;
	50	* Delay before setting the error, second;
	51	* Delay before clearing the error, second;
	52	* Lock the error until the device is reset.
	53
	54	As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
	55
	56	Error generation conditions:
	57
	58	* 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.
	59
	60	Conditions for removing the error:
	61
	62	* 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.
	63
	64	(% class="box infomessage" %)
	65	(((
	66	If there is the "Undervoltage" error, the discharging relay opens.
	67	)))
	68
4.2	69	3.6.3 Overvoltage protection
	70
	71	To change the battery protection parameters from high voltage on the cells, select the menu "Protections → Overvoltage protection":
	72
6.2	73	[[Overvoltage protection settings>>image:1732212357972-295.png\|\|data-xwiki-image-style-alignment="center" height="218" width="338"]]
4.2	74
4.3	75	In this section:
	76
	77	* Enable – a flag to enable the protection;
	78	* Maximum cell voltage, V;
	79	* Tolerant cell voltage, V;
	80	* Delay before setting the error, second;
	81	* Delay before clearing the error, second;
	82	* Switch off the discharging relay on error – a flag to open the discharging relay when the "Overvoltage" error is generated;
	83	* Lock the error until the device is reset.
	84
	85	As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
	86
	87	Error generation conditions:
	88
	89	* 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.
	90
	91	Conditions for removing the error:
	92
	93	* 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.
	94
	95	(% class="box infomessage" %)
	96	(((
	97	If there is the "Overvoltage" error, the charging relay and discharging relay opens (if the “Switch off the discharging relay on error” flag is set).
	98	)))
	99
4.10	100	== 3.6.4 Low temperature protection ==
4.3	101
4.11	102	The board implements battery protection from too low temperature.
4.4	103
4.11	104	To change the battery protection parameters from low temperature, select the menu "Protections → Low temperature protection":
	105
6.2	106	[[Low temperature protection settings>>image:1732213953083-955.png\|\|data-xwiki-image-style-alignment="center" height="237" width="338"]]
4.11	107
	108	In this section:
	109
	110	* Enable – a flag to enable the protection;
	111	* Minimum charging temperature, °C;
	112	* Tolerant charging temperature, °C;
	113	* Minimum discharging temperature, °C;
	114	* Tolerant discharging temperature, °C;
	115	* Delay before setting the error, second;
	116	* Delay before clearing the error, second;
	117	* Lock the error until the device is reset.
	118
	119	As a result of the operation of the battery protection from low temperature, the "Low CH temperature" or “Low DCH temperature” error is generated.
	120
	121	Error generation conditions:
	122
	123	* 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.
	124
	125	Conditions for removing the error:
	126
	127	* 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.
	128
	129	(% class="box infomessage" %)
	130	(((
4.12	131	If there is the "Low CH temperature" error, the charging relay opens.
	132	If there is the "Low DCH temperature" error, the discharging relay opens.
4.11	133	)))
	134
4.10	135	== 3.6.5 High temperature protection ==
4.5	136
4.11	137	The board implements battery protection from too high temperature.
	138
	139	To change the battery protection parameters from high temperature, select the menu "Protections → High temperature protection":
	140
7.2	141	[[High temperature protection settings>>image:1732213990755-759.png\|\|data-xwiki-image-style-alignment="center" height="258" width="370"]]
4.12	142
4.11	143	In this section:
	144
	145	* Enable – a flag to enable the protection;
	146	* Maximum charging temperature, °C;
	147	* Tolerant charging temperature, °C;
	148	* Maximum discharging temperature, °C;
	149	* Tolerant discharging temperature, °C;
	150	* Delay before setting the error, second;
	151	* Delay before clearing the error, second;
	152	* Lock the error until the device is reset.
	153
	154	As a result of the operation of the battery protection from high temperature, the "High CH temperature" or “High DCH temperature” error is generated.
	155
	156	Error generation conditions:
	157
	158	* 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.
	159
	160	Conditions for removing the error:
	161
	162	* 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.
	163
	164	(% class="box infomessage" %)
	165	(((
	166	If there is the "High CH temperature" error, the charging relay opens.
	167	If there is the "High DCH temperature" error, the discharging relay opens.
	168	)))
	169
4.10	170	== 3.6.6 Battery cover protection ==
4.5	171
4.12	172	To change the protection parameters from opening the battery cover, select the menu "Protections → Battery cover protection":
	173
7.2	174	[[Battery cover protection settings>>image:1732214030014-281.png\|\|data-xwiki-image-style-alignment="center" height="155" width="334"]]
	175
4.12	176	In this section:
	177
	178	* Enable – a flag to enable the protection;
	179	* Delay before setting the error, second;
	180	* Delay before clearing the error, second;
	181	* Lock the error until the device is reset.
	182
	183	As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
	184
	185	Error generation conditions:
	186
	187	* there is a signal from the battery cover during the “Delay before setting the error” time.
	188
	189	Conditions for removing the error:
	190
	191	* no signal from the battery cover during the “Delay before clearing the error” time.
	192
	193	(% class="box warningmessage" %)
	194	(((
	195	If there is the "Battery cover error", the “Critical error” is generated and all relays open.
	196	)))
	197
4.13	198	== 3.6.7 High humidity protection ==
4.10	199
4.13	200	The board can protect the battery from high humidity and water.
	201
	202	To change the protection parameters of the battery from high humidity, select the menu "Protections → High humidity protection":
	203
10.2	204	[[High humidity protection settings>>image:1732214076060-358.png\|\|data-xwiki-image-style-alignment="center" height="185" width="321"]]
4.14	205
4.13	206	In this section:
	207
	208	* Enable – a flag to enable the protection;
10.2	209	* Maximum humidity, RH%;
	210	* Tolerant humidity, RH%;
4.13	211	* Delay before setting the error, second;
	212	* Delay before clearing the error, second;
	213	* Lock the error until the device is reset.
	214
	215	As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
	216
	217	Error generation conditions:
	218
	219	* the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
	220
	221	Conditions for removing the error:
	222
	223	* the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
	224
4.14	225	(% class="box infomessage" %)
	226	(((
4.13	227	If there is the "High humidity" error, no action is taken. The error is indicative.
4.14	228	)))
4.13	229
4.10	230	== 3.6.8 Water protection ==
	231
4.14	232	To change the protection parameters of the battery from water, select the menu "Protections → Water protection":
	233
10.2	234	[[Water protection settings>>image:1732214111990-184.png\|\|data-xwiki-image-style-alignment="center" height="199" width="340"]]
4.14	235
	236	In this section:
	237
	238	* Enable – a flag to enable the protection;
	239	* Maximum (water) humidty, RH%;
	240	* Tolerant humidity, RH%;
	241	* Delay before setting the error, second;
	242	* Delay before clearing the error, second;
	243	* Lock the error until the device is reset.
	244
	245	As a result of the operation of the battery protection from water, the "Water" error is generated.
	246
	247	Error generation conditions:
	248
	249	* the measured humidity is greater than the “Maximum (water) humidity” value during the “Delay before setting the error” time.
	250
	251	Conditions for removing the error:
	252
	253	* the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
	254
	255	(% class="box warningmessage" %)
	256	(((
	257	If there is the “Water” error, the “Critical error” is generated and all relays open.
	258	)))
	259
4.10	260	== 3.6.9 Current sensor error ==
	261
4.14	262	The board is implemented to check the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
	263
	264	To change the test parameters of the current sensor connection circuits, select the menu "Protections → Current sensor error":
	265
12.2	266	[[Current sensor error settings>>image:1732214146724-132.png\|\|data-xwiki-image-style-alignment="center" height="438" width="365"]]
4.14	267
	268	In this section:
	269
	270	* Enable – a flag to enable the protection;
	271	* Maximum voltage, V;
	272	* Minimum voltage, V;
	273	* Hysteresis voltage – a hysteresis value to clear the error, V;
	274	* Delay before setting the error, second;
	275	* Delay before clearing the error, second;
	276	* Lock the error until the device is reset.
	277
	278	If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
	279
	280	Error generation conditions:
	281
	282	* the voltage in the signal line or zero level line of the current sensor is greater than the “Maximum voltage” value during the “Delay before setting the error” time;
	283	* the voltage in the signal line or zero level line of the current sensor is less than the “Minimum voltage” value during the “Delay before setting the error” time.
	284
	285	Conditions for removing the error:
	286
	287	* the voltage in the signal line or zero level line of the current sensor is in range from (Minimum voltage + Hysteresis voltage) to (Maximum voltage - Hysteresis voltage) during the “Delay before clearing the error” time.
	288
4.15	289	(% class="box warningmessage" %)
	290	(((
4.14	291	If there is the “Current sensor error”, the “Critical error” is generated and all relays open.
4.15	292	)))
4.14	293
4.10	294	== 3.6.10 Short circuit protection ==
	295
4.15	296	The BMS implements a protection of power circuits (contactors, power cables) against overheating caused by the flow of high current for a long time.
	297
	298	To change the protection parameters from short circuit, select the menu "Protections → Short circuit protection":
	299
13.2	300	[[Short circuit protection settings>>image:1732214207026-822.png\|\|data-xwiki-image-style-alignment="center" height="528" width="371"]]
4.15	301
	302	In this section:
	303
	304	* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
	305	** Enable – a flag to enable the protection;
	306	** Maximum current, A;
	307	** Delay before setting the error, second;
	308	* Delay before clearing the error, second;
	309	* Switch off the charging relay on error – a flag to open the charging relay when the "Short circuit" error occurs;
	310	* Switch off the discharging relay on error – a flag to open the discharging relay when the "Short circuit" error occurs;
	311	* Lock the error until the device is reset.
	312
	313	If there is a short circuit, the "Short circuit" error is generated.
	314
	315	Error generation conditions:
	316
	317	* 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.
	318
	319	Conditions for removing the error:
	320
	321	* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
	322
	323	(% class="box infomessage" %)
	324	(((
	325	If there is the "Short circuit" error, the charging relay opens (the “Switch off the charging relay on error” flag is set) and the discharging relay opens (the “Switch off the discharging relay on error flag” is set).
	326	)))
	327
4.10	328	== 3.6.11 Contactor high temperature protection ==
	329
4.15	330	The BMS protects power contactors from overheating. To measure the temperature of the contactor, a thermistor is used, connected to the P13 connector of the board. Configuring of the analog input for temperature measurement is described in section Input signals.
	331
	332	To change the overheating protection parameters of power contactors, select the menu "Protections → Contactor high temperature protection":
	333
14.2	334	[[Contactor high temperature protection settings>>image:1732214237851-405.png\|\|data-xwiki-image-style-alignment="center" height="234" width="336"]]
4.15	335
	336	In this section:
	337
	338	* Enable – a flag to enable the protection;
	339	* Maximum temperature, °C;
	340	* Tolerant temperature, °C;
	341	* Delay before setting the error, second;
	342	* Delay before clearing the error, second;
	343	* Switch off the charging relay on error – a flag to open the charging relay when the "Contactor high temperature" error occurs;
	344	* Switch off the discharging relay on error – a flag to open the discharging relay when the "Contactor high temperature" error occurs;
	345	* Lock the error until the device is reset.
	346
	347	If there is a contactor overheat, the "Contactor high temperature" error is generated.
	348
	349	Error generation conditions:
	350
	351	* the contactor temperature is greater than the “Maximum temperature” value during the “Delay before setting the error” time.
	352
	353	Conditions for removing the error:
	354
	355	* the contactor temperature is lower than the “Tolerant temperature” value during the “Delay before clearing the error” time.
	356
	357	(% class="box infomessage" %)
	358	(((
	359	If there is the "Contactor high temperature" error, the charging relay opens (the “Switch off the charging relay on error” flag is set) and the discharging relay opens (the “Switch off the discharging relay on error flag” is set).
	360	)))
	361
4.10	362	== 3.6.12 Unallowable charging protection ==
	363
4.16	364	The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging relay to prevent unallowable battery operation.
	365
	366	To change the parameters of the unallowable charging protection, select the menu "Protections → Unallowable charging protection":
	367
14.2	368	[[Unallowable charging protection settings>>image:1732214272022-547.png\|\|data-xwiki-image-style-alignment="center" height="145" width="312"]]
4.16	369
	370	In this section:
	371
	372	* Enable – a flag to enable the protection;
	373	* Delay before setting the error, second;
	374	* Delay before clearing the error, second;
	375	* Lock the error until the device is reset.
	376
	377	If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
	378
	379	Error generation conditions:
	380
	381	* the charging relay is open and the battery current is not zero during the “Delay before setting the error” time.
	382
	383	Conditions for removing the error:
	384
	385	* the battery current is zero during the “Delay before clearing the error” time.
	386
	387	(% class="box infomessage" %)
	388	(((
	389	If there is the "Unallowable charging" error, the discharging relay opens.
	390	)))
	391
4.10	392	== 3.6.13 Stuck contactor protection ==
	393
4.16	394	The BMS Main 2.x protects contactors against sticking.
	395
	396	To change the protection parameters against sticking, select the menu "Protections → Stuck contactor protection":
	397
	398
	399	In this section:
	400
	401	* Enable – a flag to enable the protection;
	402	* Delay before setting the error, second;
	403	* Delay before clearing the error, second;
	404	* Lock the error until the device is reset;
	405
	406	If there is a stuck contactor, the “Stuck contactor” error is generated.
	407
	408	Error generation conditions:
	409
	410	* charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
	411
4.10	412	== 3.6.14 Contactor feedback check ==
	413
4.16	414	The BMS Main 2.x can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, one of the discrete input must be set as corresponding contactor feedback signal (see section Input and output signals).
	415
	416	To change the contactor feedback check parameters, select the menu "Protections → Contactor feedback check":
	417
4.17	418
	419	In this section:
	420
	421	* Enable – a flag to enable the protection;
	422	* Delay before setting the error, second;
	423	* Delay before clearing the error, second;
	424	* Lock the error until the device is reset;
	425
	426	If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
	427
	428	* discrete output of charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
	429
4.10	430	== 3.6.15 Charging contactor cycles protection ==
	431
4.18	432	The BMS protects the charging contactor against frequent switching.
4.17	433
4.18	434	To change the protection parameters against high frequency switching of the charging contactor, select the menu "Protections → Charging contactor cycles protection":
	435
	436
	437	In this section:
	438
	439	* Enable – a flag to enable the protection;
	440	* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
	441	* Period – a time in which the BMS counts switchings of the charging contactor, second;
	442	* Delay before setting the error, second;
	443	* Delay before clearing the error, second;
	444	* Lock the error until the device is reset;
	445	* Cycles – a number of the charging contactor switchings made during battery operation.
	446
	447	If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
	448
	449	Error generation conditions:
	450
	451	* the number of switchings of the charging contactor for the “Period” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	452
	453	Conditions for removing the error:
	454
	455	* the “Delay before clearing the error” time has passed since the error was generated.
	456
	457	(% class="box infomessage" %)
	458	(((
	459	If there is the "CH contactor cycles error" error, the charging relay opens.
	460	)))
	461
4.10	462	== 3.6.16 Discharging contactor cycles protection ==
	463
4.18	464	The BMS protects the discharging contactor against frequent switching.
	465
	466	To change the protection parameters against high frequency switching of the discharging contactor, select the menu "Protections → Discharging contactor cycles protection":
	467
	468
	469	In this section:
	470
	471	* Enable – a flag to enable the protection;
	472	* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
	473	* Period – a time in which the BMS counts switchings of the charging contactor, second;
	474	* Delay before setting the error, second;
	475	* Delay before clearing the error, second;
	476	* Lock the error until the device is reset;
	477	* Cycles – a number of the charging contactor switchings made during battery operation.
	478
	479	If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
	480
	481	Error generation conditions:
	482
	483	* the number of switchings of the discharging contactor for the “Period” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	484
	485	Conditions for removing the error:
	486
	487	* the “Delay before clearing the error” time has passed since the error was generated.
	488
	489	(% class="box infomessage" %)
	490	(((
	491	If there is the "DCH contactor cycles error" error, the discharging relay opens.
	492	)))
	493
4.10	494	== 3.6.17 Temperature sensor error ==
	495
4.18	496	The board is implemented to check the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
	497
	498	To change the protection parameters of the temperature sensors circuits, select the menu "Protections → Temperature sensor error":
	499
	500
	501	In this section:
	502
	503	* Enable – a flag to enable the protection;
	504	* Delay before setting the error, second;
	505	* Delay before clearing the error, second;
	506	* Lock the error until the device is reset.
	507
	508	If there are no temperature sensors connected to a BMS Logic board or any temperature sensor 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.
	509
4.19	510	(% class="box warningmessage" %)
	511	(((
4.18	512	If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the “Critical error” is generated and all relays open.
4.19	513	)))
4.18	514
4.10	515	== 3.6.18 Logic high temperature protection ==
	516
4.19	517	To change the overheating protection parameters of BMS Logic boards, select the menu "Protections → Logic high temperature protection":
	518
	519
	520	In this section:
	521
	522	* Enable – a flag to enable the protection;
	523	* Maximum Logic temperature, °C;
	524	* Tolerant Logic temperature, °C;
	525	* Lock the error until the device is reset.
	526
	527	As a result of the operation of the protection from high temperatures of BMS Logic boards, the "Logic high temperature" is generated.
	528
	529	Error generation conditions:
	530
	531	* a BMS Logic board temperature is higher than the “Maximum Logic temperature” value.
	532
	533	Conditions for removing the error:
	534
	535	* a BMS Logic board temperature is less than the “Tolerant Logic temperature” value.
	536
	537	(% class="box infomessage" %)
	538	(((
	539	Cell balancing is prohibited for overheated boards.
	540	)))
	541
4.10	542	== 3.6.19 Logic offline protection ==
	543
4.19	544	To change the protection parameters from loss of communication with BMS Logic boards, select the menu "Protections → Logic offline protection":
	545
	546
4.20	547	In this section:
4.19	548
4.20	549	* Enable – a flag to enable the protection;
	550	* Lock the error until the device is reset.
	551
	552	As a result of the protection from loss of communication with BMS Logic boards, the "Logic offline" error is generated.
	553
	554	Error generation conditions:
	555
	556	* at least one of the connected BMS Logic boards does not respond to the commands of the BMS Main 2.x board for 10 seconds.
	557
	558	Conditions for removing the error:
	559
	560	* all connected BMS Logic boards respond to the commands of the BMS Main 2.x board.
	561
	562	(% class="box warningmessage" %)
	563	(((
	564	If there is the "Logic offline" error, the “Critical error” is generated and all relays open.
	565	)))
	566
4.10	567	== 3.6.20 Cell count protection ==
	568
4.20	569	To change the protection parameters from the mismatch of the number of cells to the set value, select the menu "Protections → Cell count protection":
	570
	571
	572	In this section:
	573
	574	* Enable – a flag to enable the protection;
	575	* Cell count – a number of cells connected to the BMS;
	576	* Delay before setting the error, second;
	577	* Delay before clearing the error, second;
	578	* Lock the error until the device is reset.
	579
	580	As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
	581
	582	Error generation conditions:
	583
	584	* the number of cells connected to the BMS is not equal to the “Cell count” value during the “Delay before setting the error” time.
	585
	586	Conditions for removing the error:
	587
	588	* the number of cells connected to the BMS is equal to the “Cell count” value during the “Delay before clearing the error” time.
	589
	590	(% class="box warningmessage" %)
	591	(((
	592	If there is the "Cell count error", the “Critical error” is generated and all relays open.
	593	)))
	594
4.10	595	== 3.6.21 Logic count protection ==
	596
4.20	597	To change the protection parameters from the mismatch of the number of BMS Logic boards to the set value, select the menu "Protections → Logic count protection":
	598
	599
	600	In this section:
	601
	602	* Enable – a flag to enable the protection;
	603	* Logic count – a number of BMS Logic boards connected to the BMS Main 2.x;
	604	* Fast scan – a flag to scan BMS Logic boards fast (boards with addresses from 1 to “Logic count” are scanned; this mode reduces BMS system startup time);
	605	* Lock the error until the device is reset.
	606
	607	As a result of the operation of the protection from the mismatch of the number of BMS Logic boards, the "Logic count error" is generated.
	608
	609	Error generation conditions:
	610
	611	* the number of BMS Logic boards connected to the BMS Main 2.x is not equal to the “Logic count” value.
	612
	613	Conditions for removing the error:
	614
	615	* the number of BMS Logic boards connected to the BMS Main is equal to the “Logic count” value.
	616
	617	(% class="box warningmessage" %)
	618	(((
	619	If there is the "Logic count error", the “Critical error” is generated and all relays open.
	620	)))
	621
4.10	622	== 3.6.22 WDT protection ==
	623
4.20	624	If the BMS firmware hangs, the watchdog timer resets the board. The BMS can detect that the board was reset and generates the “WDT reset” error.
	625
	626	To change the parameters of the watchdog protection, select the menu "Protections → WDT protection":
	627
	628
4.21	629	In this section:
	630
	631	* Enable – a flag to enable the protection;
	632	* Delay before clearing the error, second;
	633	* Lock the error until the device is reset.
	634
	635	Conditions for removing the error:
	636
	637	* the “Delay before clearing the error” time has passed from the board startup.
	638
4.22	639	(% class="box warningmessage" %)
	640	(((
4.21	641	If there is the "WDT reset" error, the “Critical error” is generated and all relays open.
4.22	642	)))
4.21	643
4.10	644	== 3.6.23 Insulation monitoring ==
	645
4.22	646	BMS Main 2.x can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
	647
	648	To change the insulation monitoring parameters, select the menu "Protections → Insulation monitoring":
	649
	650
	651	In this section:
	652
	653	* Enable – a flag to enable the protection;
	654	* Delay before setting the error, second;
	655	* Delay before clearing the error, second;
	656	* Lock the error until the device is reset.
	657
	658	Error is set if corresponding discrete input is set up and it received logical zero.
	659
4.10	660	== 3.6.24 Critical error parameters ==
	661
4.22	662	To change the critical error parameters, select the menu "Protections → Critical error parameters":
	663
	664
	665	In this section:
	666
	667	* Enable – a flag to enable the protection;
	668	* Delay before setting the error, second;
	669	* Delay before clearing the error, second;
	670	* Lock the error until the device is reset.
	671
	672	The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
	673
	674	* “Battery cover error”;
	675	* “Water”;
	676	* “Logic offline”;
	677	* “Cell count error”;
	678	* “Logic count error”;
	679	* “ADC error”;
	680	* “No temp. sensors”;
	681	* “Temp. sensor is shorted”;
	682	* “Current sensor error”;
	683	* “Shunt offline”;
	684	* “Shunt error”;
	685	* “Settings error”;
	686	* “WDT reset”.
	687
	688	The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
	689
	690	(% class="box warningmessage" %)
	691	(((
	692	If there is the “Critical error”, all relays open.
	693	)))
	694
4.10	695	== 3.6.25 General error parameters ==
	696
	697	== 3.6.26 Low SOC signal ==
	698
4.22	699	To change the parameters of the generation a signal about low battery level, select the menu "Protections → Low SOC signal":
	700
	701
	702	In this section:
	703
	704	* Enable – a flag to enable signal generation;
	705	* Minimum SOC, %;
	706	* Tolerant SOC, %;
	707	* Delay before setting the signal, second;
	708	* Delay before clearing the signal, second;
	709	* Lock the signal until the device is reset.
	710
	711	Signal generation conditions:
	712
	713	* the battery SOC is less than the “Minimum SOC” value during the “Delay before setting the signal” time.
	714
	715	Conditions for clearing the signal:
	716
	717	* the battery SOC is greater than the “Tolerant SOC” during the “Delay before clearing the signal” time.
	718
4.23	719	The "Low SOC signal" is //indicative //and can be linked to any discrete output of the board.
4.22	720
4.10	721	== 3.6.27 High charging current signal ==
	722
4.23	723	To change the parameters of the generation high-current signal, select the menu "Protections → High charging current signal":
	724
	725
	726	In this section:
	727
	728	* Enable – a flag to enable signal generation;
	729	* Maximum charging current, А;
	730	* Tolerant charging current, А;
	731	* Delay before setting the signal, second;
	732	* Delay before clearing the signal, second;
	733	* Lock the signal until the device is reset.
	734
	735	Signal generation conditions:
	736
	737	* the measured current is greater than the “Maximum charging current” value during the “Delay before setting the signal” time.
	738
	739	Conditions for clearing the signal:
	740
	741	* the measured current is less than the “Tolerant charging current” value during the “Delay before clearing the signal” time.
	742
	743	The "High charging current" signal is //indicative //and can be linked to any discrete output of the board.
	744
4.10	745	== 3.6.28 Heater control ==
	746
4.23	747	To change the parameters of the heater control algorithm, select the menu "Protections → Heater control":
	748
	749
	750	In this section:
	751
	752	* Enable – a flag to enable heater control;
	753	* Minimum cell temperature, °C;
	754	* Tolerant cell temperature, °C;
	755	* Delay before setting the signal, second;
	756	* Delay before clearing the signal, second;
	757	* Lock the signal until the device is reset;
	758	* Switch off the heater relay on errors (Undervoltage, Overcurrent, High temperature, Short circuit or Critical error).
	759
	760	As a result of operating the heating algorithm, the “Heater” signal is generated.
	761
	762	Conditions of signal generation:
	763
	764	* The minimum temperature among all cells of the battery is less than the “Minimum cell temperature” value during the “Delay before setting the signal” time.
	765
	766	Conditions for clearing the signal:
	767
	768	* the minimum temperature among all cells of the battery is greater than the “Tolerant cell temperature” value during the “Delay before clearing the signal” time.
	769
4.24	770	(% class="box infomessage" %)
	771	(((
4.23	772	If there is the "Heater" signal, the heater relay closes and/or a signal is output to the corresponded digital output.
4.24	773	)))
4.23	774
4.10	775	== 3.6.29 Heater (AUX) control ==
	776
4.25	777	To change the parameters of the auxiliary heater control algorithm, select the menu "Protections → Heater (AUX) control":
4.24	778
	779
	780	In this section:
	781
	782	* Enable – a flag to enable heater control;
	783	* Minimum cell temperature, °C;
	784	* Tolerant cell temperature, °C;
	785	* Delay before setting the signal, second;
	786	* Delay before clearing the signal, second;
	787	* Lock the signal until the device is reset;
	788	* Switch off the heater relay on errors (Undervoltage, Overcurrent, High temperature, Short circuit or Critical error).
	789
	790	As a result of operating the heating algorithm, the “Heater (AUX)” signal is generated.
	791
	792	Conditions of signal generation:
	793
	794	* The minimum temperature among all cells of the battery is less than the “Minimum cell temperature” value during the “Delay before setting the signal” time.
	795
	796	Conditions for clearing the signal:
	797
	798	* the minimum temperature among all cells of the battery is greater than the “Tolerant cell temperature” value during the “Delay before clearing the signal” time.
	799
4.25	800	(% class="box infomessage" %)
	801	(((
	802	If there is the "Heater (AUX)" signal, the auxiliary heater relay closes and/or a signal is output to the corresponded digital output.
	803	)))
4.24	804
4.10	805	== 3.6.30 Cooler control ==
	806
4.25	807	To change the parameters of the cooler control algorithm, select the menu "Protections → Cooler control":
	808
	809
	810	In this section:
	811
	812	* Enable – a flag to enable cooler control;
	813	* Maximum cell temperature, °C;
	814	* Tolerant cell temperature, °C;
	815	* Delay before setting the signal, second;
	816	* Delay before clearing the signal, second;
	817	* Lock the signal until the device is reset;
	818	* Switch off the cooler relay on errors (Undervoltage, Overcurrent, Low temperature, Short circuit or Critical error).
	819
	820	As a result of operating the cooling algorithm, the "Cooler" signal is generated.
	821
	822	Conditions of signal generation:
	823
	824	* the maximum temperature among all cells of the battery is greater than the “Maximum cell temperature” value during the “Delay before setting the signal” time.
	825
	826	Conditions for clearing the signal:
	827
	828	* the maximum temperature among all cells of the battery is less than the “Tolerant cell temperature” value during the “Delay before clearing the signal” time.
	829
	830	(% class="box infomessage" %)
	831	(((
	832	If there is the "Cooler" signal, the cooler relay closes and/or a signal is output to the corresponded digital output.
	833	)))
	834
4.10	835	== 3.6.31 Fault simulation ==
4.26	836
	837	The board provides the ability to manually generate error flags bypassing the protection algorithms. This functionality is intended for commissioning.
	838
	839	To simulate battery and BMS errors, select the menu "Protections → Fault simulation":
	840
	841
	842	In this section:
	843
	844	* Overcurrent;
	845	* Undervoltage;
	846	* Overvoltage;
	847	* Low CH temperature;
	848	* Low DCH temperature;
	849	* High CH temperature;
	850	* High DCH temperature;
	851	* Battery cover error;
	852	* High humidity;
	853	* Water;
	854	* Current sensor error;
	855	* Short circuit;
	856	* Contactor high temperature;
	857	* Unallowable charging;
	858	* Stuck contactor;
	859	* CH contactor feedback error;
	860	* DCH contactor feedback error;
	861	* PCH contactor feedback error;
	862	* CH/DCH contactor feedback error;
	863	* Main contactor feedback error;
	864	* CH contactor cycles error;
	865	* DCH contactor cycles error;
	866	* Logic high temperature;
	867	* Logic offline;
	868	* Cell count error;
	869	* Logic count error;
	870	* Insulation error;
	871	* Critical error;
	872	* Low SOC;
	873	* High charging current;
	874	* Heater;
	875	* Cooler.
	876
	877	To simulate errors, set the necessary flags and click on the "Save" button.

Wiki source code of 3.6 Battery protection

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