Wiki source code of 3.6 Battery protection

Version 10.2 by Admin on 2024/11/21 18:35

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
10.2	266	[[image:1732214146724-132.png]]
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
	300
	301	In this section:
	302
	303	* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
	304	** Enable – a flag to enable the protection;
	305	** Maximum current, A;
	306	** Delay before setting the error, second;
	307	* Delay before clearing the error, second;
	308	* Switch off the charging relay on error – a flag to open the charging relay when the "Short circuit" error occurs;
	309	* Switch off the discharging relay on error – a flag to open the discharging relay when the "Short circuit" error occurs;
	310	* Lock the error until the device is reset.
	311
	312	If there is a short circuit, the "Short circuit" error is generated.
	313
	314	Error generation conditions:
	315
	316	* 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.
	317
	318	Conditions for removing the error:
	319
	320	* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
	321
	322	(% class="box infomessage" %)
	323	(((
	324	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).
	325	)))
	326
4.10	327	== 3.6.11 Contactor high temperature protection ==
	328
4.15	329	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.
	330
	331	To change the overheating protection parameters of power contactors, select the menu "Protections → Contactor high temperature protection":
	332
	333
	334	In this section:
	335
	336	* Enable – a flag to enable the protection;
	337	* Maximum temperature, °C;
	338	* Tolerant temperature, °C;
	339	* Delay before setting the error, second;
	340	* Delay before clearing the error, second;
	341	* Switch off the charging relay on error – a flag to open the charging relay when the "Contactor high temperature" error occurs;
	342	* Switch off the discharging relay on error – a flag to open the discharging relay when the "Contactor high temperature" error occurs;
	343	* Lock the error until the device is reset.
	344
	345	If there is a contactor overheat, the "Contactor high temperature" error is generated.
	346
	347	Error generation conditions:
	348
	349	* the contactor temperature is greater than the “Maximum temperature” value during the “Delay before setting the error” time.
	350
	351	Conditions for removing the error:
	352
	353	* the contactor temperature is lower than the “Tolerant temperature” value during the “Delay before clearing the error” time.
	354
	355	(% class="box infomessage" %)
	356	(((
	357	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).
	358	)))
	359
4.10	360	== 3.6.12 Unallowable charging protection ==
	361
4.16	362	The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging relay to prevent unallowable battery operation.
	363
	364	To change the parameters of the unallowable charging protection, select the menu "Protections → Unallowable charging protection":
	365
	366
	367	In this section:
	368
	369	* Enable – a flag to enable the protection;
	370	* Delay before setting the error, second;
	371	* Delay before clearing the error, second;
	372	* Lock the error until the device is reset.
	373
	374	If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
	375
	376	Error generation conditions:
	377
	378	* the charging relay is open and the battery current is not zero during the “Delay before setting the error” time.
	379
	380	Conditions for removing the error:
	381
	382	* the battery current is zero during the “Delay before clearing the error” time.
	383
	384	(% class="box infomessage" %)
	385	(((
	386	If there is the "Unallowable charging" error, the discharging relay opens.
	387	)))
	388
4.10	389	== 3.6.13 Stuck contactor protection ==
	390
4.16	391	The BMS Main 2.x protects contactors against sticking.
	392
	393	To change the protection parameters against sticking, select the menu "Protections → Stuck contactor protection":
	394
	395
	396	In this section:
	397
	398	* Enable – a flag to enable the protection;
	399	* Delay before setting the error, second;
	400	* Delay before clearing the error, second;
	401	* Lock the error until the device is reset;
	402
	403	If there is a stuck contactor, the “Stuck contactor” error is generated.
	404
	405	Error generation conditions:
	406
	407	* charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
	408
4.10	409	== 3.6.14 Contactor feedback check ==
	410
4.16	411	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).
	412
	413	To change the contactor feedback check parameters, select the menu "Protections → Contactor feedback check":
	414
4.17	415
	416	In this section:
	417
	418	* Enable – a flag to enable the protection;
	419	* Delay before setting the error, second;
	420	* Delay before clearing the error, second;
	421	* Lock the error until the device is reset;
	422
	423	If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
	424
	425	* discrete output of charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
	426
4.10	427	== 3.6.15 Charging contactor cycles protection ==
	428
4.18	429	The BMS protects the charging contactor against frequent switching.
4.17	430
4.18	431	To change the protection parameters against high frequency switching of the charging contactor, select the menu "Protections → Charging contactor cycles protection":
	432
	433
	434	In this section:
	435
	436	* Enable – a flag to enable the protection;
	437	* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
	438	* Period – a time in which the BMS counts switchings of the charging contactor, second;
	439	* Delay before setting the error, second;
	440	* Delay before clearing the error, second;
	441	* Lock the error until the device is reset;
	442	* Cycles – a number of the charging contactor switchings made during battery operation.
	443
	444	If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
	445
	446	Error generation conditions:
	447
	448	* 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.
	449
	450	Conditions for removing the error:
	451
	452	* the “Delay before clearing the error” time has passed since the error was generated.
	453
	454	(% class="box infomessage" %)
	455	(((
	456	If there is the "CH contactor cycles error" error, the charging relay opens.
	457	)))
	458
4.10	459	== 3.6.16 Discharging contactor cycles protection ==
	460
4.18	461	The BMS protects the discharging contactor against frequent switching.
	462
	463	To change the protection parameters against high frequency switching of the discharging contactor, select the menu "Protections → Discharging contactor cycles protection":
	464
	465
	466	In this section:
	467
	468	* Enable – a flag to enable the protection;
	469	* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
	470	* Period – a time in which the BMS counts switchings of the charging contactor, second;
	471	* Delay before setting the error, second;
	472	* Delay before clearing the error, second;
	473	* Lock the error until the device is reset;
	474	* Cycles – a number of the charging contactor switchings made during battery operation.
	475
	476	If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
	477
	478	Error generation conditions:
	479
	480	* 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.
	481
	482	Conditions for removing the error:
	483
	484	* the “Delay before clearing the error” time has passed since the error was generated.
	485
	486	(% class="box infomessage" %)
	487	(((
	488	If there is the "DCH contactor cycles error" error, the discharging relay opens.
	489	)))
	490
4.10	491	== 3.6.17 Temperature sensor error ==
	492
4.18	493	The board is implemented to check the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
	494
	495	To change the protection parameters of the temperature sensors circuits, select the menu "Protections → Temperature sensor error":
	496
	497
	498	In this section:
	499
	500	* Enable – a flag to enable the protection;
	501	* Delay before setting the error, second;
	502	* Delay before clearing the error, second;
	503	* Lock the error until the device is reset.
	504
	505	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.
	506
4.19	507	(% class="box warningmessage" %)
	508	(((
4.18	509	If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the “Critical error” is generated and all relays open.
4.19	510	)))
4.18	511
4.10	512	== 3.6.18 Logic high temperature protection ==
	513
4.19	514	To change the overheating protection parameters of BMS Logic boards, select the menu "Protections → Logic high temperature protection":
	515
	516
	517	In this section:
	518
	519	* Enable – a flag to enable the protection;
	520	* Maximum Logic temperature, °C;
	521	* Tolerant Logic temperature, °C;
	522	* Lock the error until the device is reset.
	523
	524	As a result of the operation of the protection from high temperatures of BMS Logic boards, the "Logic high temperature" is generated.
	525
	526	Error generation conditions:
	527
	528	* a BMS Logic board temperature is higher than the “Maximum Logic temperature” value.
	529
	530	Conditions for removing the error:
	531
	532	* a BMS Logic board temperature is less than the “Tolerant Logic temperature” value.
	533
	534	(% class="box infomessage" %)
	535	(((
	536	Cell balancing is prohibited for overheated boards.
	537	)))
	538
4.10	539	== 3.6.19 Logic offline protection ==
	540
4.19	541	To change the protection parameters from loss of communication with BMS Logic boards, select the menu "Protections → Logic offline protection":
	542
	543
4.20	544	In this section:
4.19	545
4.20	546	* Enable – a flag to enable the protection;
	547	* Lock the error until the device is reset.
	548
	549	As a result of the protection from loss of communication with BMS Logic boards, the "Logic offline" error is generated.
	550
	551	Error generation conditions:
	552
	553	* 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.
	554
	555	Conditions for removing the error:
	556
	557	* all connected BMS Logic boards respond to the commands of the BMS Main 2.x board.
	558
	559	(% class="box warningmessage" %)
	560	(((
	561	If there is the "Logic offline" error, the “Critical error” is generated and all relays open.
	562	)))
	563
4.10	564	== 3.6.20 Cell count protection ==
	565
4.20	566	To change the protection parameters from the mismatch of the number of cells to the set value, select the menu "Protections → Cell count protection":
	567
	568
	569	In this section:
	570
	571	* Enable – a flag to enable the protection;
	572	* Cell count – a number of cells connected to the BMS;
	573	* Delay before setting the error, second;
	574	* Delay before clearing the error, second;
	575	* Lock the error until the device is reset.
	576
	577	As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
	578
	579	Error generation conditions:
	580
	581	* the number of cells connected to the BMS is not equal to the “Cell count” value during the “Delay before setting the error” time.
	582
	583	Conditions for removing the error:
	584
	585	* the number of cells connected to the BMS is equal to the “Cell count” value during the “Delay before clearing the error” time.
	586
	587	(% class="box warningmessage" %)
	588	(((
	589	If there is the "Cell count error", the “Critical error” is generated and all relays open.
	590	)))
	591
4.10	592	== 3.6.21 Logic count protection ==
	593
4.20	594	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":
	595
	596
	597	In this section:
	598
	599	* Enable – a flag to enable the protection;
	600	* Logic count – a number of BMS Logic boards connected to the BMS Main 2.x;
	601	* 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);
	602	* Lock the error until the device is reset.
	603
	604	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.
	605
	606	Error generation conditions:
	607
	608	* the number of BMS Logic boards connected to the BMS Main 2.x is not equal to the “Logic count” value.
	609
	610	Conditions for removing the error:
	611
	612	* the number of BMS Logic boards connected to the BMS Main is equal to the “Logic count” value.
	613
	614	(% class="box warningmessage" %)
	615	(((
	616	If there is the "Logic count error", the “Critical error” is generated and all relays open.
	617	)))
	618
4.10	619	== 3.6.22 WDT protection ==
	620
4.20	621	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.
	622
	623	To change the parameters of the watchdog protection, select the menu "Protections → WDT protection":
	624
	625
4.21	626	In this section:
	627
	628	* Enable – a flag to enable the protection;
	629	* Delay before clearing the error, second;
	630	* Lock the error until the device is reset.
	631
	632	Conditions for removing the error:
	633
	634	* the “Delay before clearing the error” time has passed from the board startup.
	635
4.22	636	(% class="box warningmessage" %)
	637	(((
4.21	638	If there is the "WDT reset" error, the “Critical error” is generated and all relays open.
4.22	639	)))
4.21	640
4.10	641	== 3.6.23 Insulation monitoring ==
	642
4.22	643	BMS Main 2.x can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
	644
	645	To change the insulation monitoring parameters, select the menu "Protections → Insulation monitoring":
	646
	647
	648	In this section:
	649
	650	* Enable – a flag to enable the protection;
	651	* Delay before setting the error, second;
	652	* Delay before clearing the error, second;
	653	* Lock the error until the device is reset.
	654
	655	Error is set if corresponding discrete input is set up and it received logical zero.
	656
4.10	657	== 3.6.24 Critical error parameters ==
	658
4.22	659	To change the critical error parameters, select the menu "Protections → Critical error parameters":
	660
	661
	662	In this section:
	663
	664	* Enable – a flag to enable the protection;
	665	* Delay before setting the error, second;
	666	* Delay before clearing the error, second;
	667	* Lock the error until the device is reset.
	668
	669	The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
	670
	671	* “Battery cover error”;
	672	* “Water”;
	673	* “Logic offline”;
	674	* “Cell count error”;
	675	* “Logic count error”;
	676	* “ADC error”;
	677	* “No temp. sensors”;
	678	* “Temp. sensor is shorted”;
	679	* “Current sensor error”;
	680	* “Shunt offline”;
	681	* “Shunt error”;
	682	* “Settings error”;
	683	* “WDT reset”.
	684
	685	The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
	686
	687	(% class="box warningmessage" %)
	688	(((
	689	If there is the “Critical error”, all relays open.
	690	)))
	691
4.10	692	== 3.6.25 General error parameters ==
	693
	694	== 3.6.26 Low SOC signal ==
	695
4.22	696	To change the parameters of the generation a signal about low battery level, select the menu "Protections → Low SOC signal":
	697
	698
	699	In this section:
	700
	701	* Enable – a flag to enable signal generation;
	702	* Minimum SOC, %;
	703	* Tolerant SOC, %;
	704	* Delay before setting the signal, second;
	705	* Delay before clearing the signal, second;
	706	* Lock the signal until the device is reset.
	707
	708	Signal generation conditions:
	709
	710	* the battery SOC is less than the “Minimum SOC” value during the “Delay before setting the signal” time.
	711
	712	Conditions for clearing the signal:
	713
	714	* the battery SOC is greater than the “Tolerant SOC” during the “Delay before clearing the signal” time.
	715
4.23	716	The "Low SOC signal" is //indicative //and can be linked to any discrete output of the board.
4.22	717
4.10	718	== 3.6.27 High charging current signal ==
	719
4.23	720	To change the parameters of the generation high-current signal, select the menu "Protections → High charging current signal":
	721
	722
	723	In this section:
	724
	725	* Enable – a flag to enable signal generation;
	726	* Maximum charging current, А;
	727	* Tolerant charging current, А;
	728	* Delay before setting the signal, second;
	729	* Delay before clearing the signal, second;
	730	* Lock the signal until the device is reset.
	731
	732	Signal generation conditions:
	733
	734	* the measured current is greater than the “Maximum charging current” value during the “Delay before setting the signal” time.
	735
	736	Conditions for clearing the signal:
	737
	738	* the measured current is less than the “Tolerant charging current” value during the “Delay before clearing the signal” time.
	739
	740	The "High charging current" signal is //indicative //and can be linked to any discrete output of the board.
	741
4.10	742	== 3.6.28 Heater control ==
	743
4.23	744	To change the parameters of the heater control algorithm, select the menu "Protections → Heater control":
	745
	746
	747	In this section:
	748
	749	* Enable – a flag to enable heater control;
	750	* Minimum cell temperature, °C;
	751	* Tolerant cell temperature, °C;
	752	* Delay before setting the signal, second;
	753	* Delay before clearing the signal, second;
	754	* Lock the signal until the device is reset;
	755	* Switch off the heater relay on errors (Undervoltage, Overcurrent, High temperature, Short circuit or Critical error).
	756
	757	As a result of operating the heating algorithm, the “Heater” signal is generated.
	758
	759	Conditions of signal generation:
	760
	761	* 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.
	762
	763	Conditions for clearing the signal:
	764
	765	* 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.
	766
4.24	767	(% class="box infomessage" %)
	768	(((
4.23	769	If there is the "Heater" signal, the heater relay closes and/or a signal is output to the corresponded digital output.
4.24	770	)))
4.23	771
4.10	772	== 3.6.29 Heater (AUX) control ==
	773
4.25	774	To change the parameters of the auxiliary heater control algorithm, select the menu "Protections → Heater (AUX) control":
4.24	775
	776
	777	In this section:
	778
	779	* Enable – a flag to enable heater control;
	780	* Minimum cell temperature, °C;
	781	* Tolerant cell temperature, °C;
	782	* Delay before setting the signal, second;
	783	* Delay before clearing the signal, second;
	784	* Lock the signal until the device is reset;
	785	* Switch off the heater relay on errors (Undervoltage, Overcurrent, High temperature, Short circuit or Critical error).
	786
	787	As a result of operating the heating algorithm, the “Heater (AUX)” signal is generated.
	788
	789	Conditions of signal generation:
	790
	791	* 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.
	792
	793	Conditions for clearing the signal:
	794
	795	* 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.
	796
4.25	797	(% class="box infomessage" %)
	798	(((
	799	If there is the "Heater (AUX)" signal, the auxiliary heater relay closes and/or a signal is output to the corresponded digital output.
	800	)))
4.24	801
4.10	802	== 3.6.30 Cooler control ==
	803
4.25	804	To change the parameters of the cooler control algorithm, select the menu "Protections → Cooler control":
	805
	806
	807	In this section:
	808
	809	* Enable – a flag to enable cooler control;
	810	* Maximum cell temperature, °C;
	811	* Tolerant cell temperature, °C;
	812	* Delay before setting the signal, second;
	813	* Delay before clearing the signal, second;
	814	* Lock the signal until the device is reset;
	815	* Switch off the cooler relay on errors (Undervoltage, Overcurrent, Low temperature, Short circuit or Critical error).
	816
	817	As a result of operating the cooling algorithm, the "Cooler" signal is generated.
	818
	819	Conditions of signal generation:
	820
	821	* 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.
	822
	823	Conditions for clearing the signal:
	824
	825	* 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.
	826
	827	(% class="box infomessage" %)
	828	(((
	829	If there is the "Cooler" signal, the cooler relay closes and/or a signal is output to the corresponded digital output.
	830	)))
	831
4.10	832	== 3.6.31 Fault simulation ==
4.26	833
	834	The board provides the ability to manually generate error flags bypassing the protection algorithms. This functionality is intended for commissioning.
	835
	836	To simulate battery and BMS errors, select the menu "Protections → Fault simulation":
	837
	838
	839	In this section:
	840
	841	* Overcurrent;
	842	* Undervoltage;
	843	* Overvoltage;
	844	* Low CH temperature;
	845	* Low DCH temperature;
	846	* High CH temperature;
	847	* High DCH temperature;
	848	* Battery cover error;
	849	* High humidity;
	850	* Water;
	851	* Current sensor error;
	852	* Short circuit;
	853	* Contactor high temperature;
	854	* Unallowable charging;
	855	* Stuck contactor;
	856	* CH contactor feedback error;
	857	* DCH contactor feedback error;
	858	* PCH contactor feedback error;
	859	* CH/DCH contactor feedback error;
	860	* Main contactor feedback error;
	861	* CH contactor cycles error;
	862	* DCH contactor cycles error;
	863	* Logic high temperature;
	864	* Logic offline;
	865	* Cell count error;
	866	* Logic count error;
	867	* Insulation error;
	868	* Critical error;
	869	* Low SOC;
	870	* High charging current;
	871	* Heater;
	872	* Cooler.
	873
	874	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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