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Wiki source code of 3.4 Protections

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1 (% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 = Configuration =
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
9 (% class="box errormessage" %)
10 (((
11 **Attention!**
12 Behavior of contactors at different errors is configured in **corresponding contactor settings**!
13 )))
14
15 === Overcurrent ===
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
21 [[image:1735224601506-488.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
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
46 === Charge current limit ===
47
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.
49
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.
51
52 To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
53
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;
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;
58 * Region 1: Current difference – a value of maximum absolute current difference, A;
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.
63
64 === Discharge current limit ===
65
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.
67
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.
69
70 To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
71
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;
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;
78 * Region 1: Current difference – a value of maximum absolute current difference, A;
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.
83
84 === Undervoltage ===
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
90 [[image:1735224224155-829.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
91
92 In this section:
93
94 * Enable – a flag to enable the protection;
95 * Minimum cell voltage, V;
96 * Tolerant cell voltage, V;
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;
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
112 === Overvoltage ===
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
118 [[image:1735224377252-473.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
119
120 In this section:
121
122 * Enable – a flag to enable the protection;
123 * Maximum cell voltage, V;
124 * Tolerant cell voltage, V;
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;
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
140 === Low temperature ===
141
142 The BMS Main 3 device implements battery protection from too low temperature.
143
144 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
145
146 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
147
148 In this section:
149
150 * Enable – a flag to enable the protection;
151 * Minimum charge temperature, °C;
152 * Tolerant charge temperature, °C;
153 * Minimum discharge temperature, °C;
154 * Tolerant discharge temperature, °C;
155 * Delay before setting the error, millisecond;
156 * Delay before clearing the error, second;
157 * Lock – a flag to block the error until the device is restarted.
158
159 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.
160
161 Error generation conditions:
162
163 * 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.
164
165 Conditions for removing the error:
166
167 * 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.
168
169 === High temperature ===
170
171 The BMS Main 3 device implements battery protection from too high temperature.
172
173 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
174
175 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
176
177 In this section:
178
179 * Enable – a flag to enable the protection;
180 * Maximum charge temperature, °C;
181 * Tolerant charge temperature, °C;
182 * Maximum discharge temperature, °C;
183 * Tolerant discharge temperature, °C;
184 * Delay before setting the error, millisecond;
185 * Delay before clearing the error, second;
186 * Lock – a flag to block the error until the device is restarted.
187
188 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
189
190 Error generation conditions:
191
192 * 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.
193
194 Conditions for removing the error:
195
196 * 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.
197
198 === Battery cover ===
199
200 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
201
202 [[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
203
204 In this section:
205
206 * Enable – a flag to enable the protection;
207 * Delay before setting the error, millisecond;
208 * Delay before clearing the error, second;
209 * Lock – a flag to block the error until the device is restarted.
210
211 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
212
213 Error generation conditions:
214
215 * there is a signal from the battery cover during the “Delay before setting the error” time.
216
217 Conditions for removing the error:
218
219 * no signal from the battery cover during the “Delay before clearing the error” time.
220
221 (% class="box warningmessage" %)
222 (((
223 If there is the "Battery cover error", the **“Critical error” **is generated**.**
224 )))
225
226 === High humidity ===
227
228 The BMS Main 3 can detect that the battery is operating in high humidity conditions.
229
230 To change the detection parameters, select the "Protections → High humidity" section:
231
232 [[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
233
234 In this section:
235
236 * Enable – a flag to enable the detection;
237 * Maximum humidity, RH%;
238 * Tolerant humidity, RH%;
239 * Delay before setting the error, second;
240 * Delay before clearing the error, second;
241 * Lock the error until the device is reset.
242
243 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
244
245 Error generation conditions:
246
247 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
248
249 Conditions for removing the error:
250
251 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
252
253 (% class="box infomessage" %)
254 (((
255 If there is the "High humidity" error, no action is taken. The error is indicative.
256 )))
257
258 === Water ===
259
260 The BMS Main 3 can protect the battery from working in very high humidity conditions.
261
262 To change the protection parameters, select the "Protections → Water" section:
263
264 [[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
265
266 In this section:
267
268 * Enable – a flag to enable the protection;
269 * Maximum humidity, RH%;
270 * Tolerant humidity, RH%;
271 * Delay before setting the error, second;
272 * Delay before clearing the error, second;
273 * Lock – lock the error until the device is reset.
274
275 As a result of the operation of the battery protection from water, the "Water" error is generated.
276
277 Error generation conditions:
278
279 * the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
280
281 Conditions for removing the error:
282
283 * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
284
285 (% class="box warningmessage" %)
286 (((
287 If there is the “Water” error, the **“Critical error”** is generated.
288 )))
289
290 === Logic high temperature ===
291
292 To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
293
294 [[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
295
296 In this section:
297
298 * Enable – a flag to enable the protection;
299 * Maximum temperature, °C;
300 * Tolerant temperature, °C;
301 * Delay before setting the error, second;
302 * Delay before clearing the error, second;
303 * Lock – lock the error until the device is reset.
304
305 As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
306
307 Error generation conditions:
308
309 * a BMS Logic device temperature is higher than the “Maximum temperature” value.
310
311 Conditions for removing the error:
312
313 * a BMS Logic device temperature is less than the “Tolerant temperature” value.
314
315 (% class="box infomessage" %)
316 (((
317 Cell balancing is disabled on Logic devices with high temperature.
318 )))
319
320 === Logic offline ===
321
322 To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
323
324 [[image:1755871522789-489.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
325
326
327 In this section:
328
329 * Enable – a flag to enable the protection;
330 * Delay before setting the error, second;
331 * Delay before clearing the error, second;
332 * Lock – lock the error until the device is reset.
333
334 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
335
336 Error generation conditions:
337
338 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
339
340 Conditions for removing the error:
341
342 * all connected BMS Logic devices respond to the commands of the BMS Main device.
343
344 (% class="box warningmessage" %)
345 (((
346 If there is the "Logic offline" error, the **“Critical error” **is generated**.**
347 )))
348
349 === Cell count ===
350
351 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
352
353 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
354
355 In this section:
356
357 * Enable – a flag to enable the protection;
358 * Number of cells – a number of cells connected to the BMS;
359 * Delay before setting the error, millisecond;
360 * Delay before clearing the error, second;
361 * Lock – a flag to block the error until the device is restarted.
362
363 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
364
365 Error generation conditions:
366
367 * 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.
368
369 Conditions for removing the error:
370
371 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
372
373 (% class="box warningmessage" %)
374 (((
375 If there is the "Cell count error", the **“Critical error” **is generated**.**
376 )))
377
378 === Logic count ===
379
380 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:
381
382 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
383
384 In this section:
385
386 * Enable – a flag to enable the protection;
387 * Logic count – a number of BMS Logic devices connected to the BMS Main;
388 * 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);
389 * Lock – lock the error until the device is reset.
390
391 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.
392
393 Error generation conditions:
394
395 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
396
397 Conditions for removing the error:
398
399 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
400
401 (% class="box warningmessage" %)
402 (((
403 If there is the "Logic count error", the **“Critical error”** is generated.
404 )))
405
406 === Short circuit ===
407
408 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.
409
410 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
411
412 [[image:1735224667621-969.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
413
414 In this section:
415
416 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
417 ** Enable – a flag to enable the protection;
418 ** Maximum current, A;
419 ** Delay before setting the error, second;
420 * Delay before clearing the error, second;
421 * Lock – a flag to block the error until the device is restarted.
422
423 If there is a short circuit, the "Short circuit" error is generated.
424
425 Error generation conditions:
426
427 * 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.
428
429 Conditions for removing the error:
430
431 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
432
433 === High contactor temperature ===
434
435 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.
436
437 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
438
439 [[image:1735224706573-347.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
440
441 In this section:
442
443 * Enable – a flag to enable the protection;
444 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
445 * Maximum contactor temperature, °C;
446 * Tolerant contactor temperature, °C;
447 * Delay before setting the error, second;
448 * Delay before clearing the error, second;
449 * Lock – a flag to block the error until the device is restarted.
450
451 If there is a contactor overheat, the "High contactor temperature" error is generated.
452
453 Error generation conditions:
454
455 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
456
457 Conditions for removing the error:
458
459 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
460
461 === Current sensor ===
462
463 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.
464
465 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
466
467 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
468
469 In this section:
470
471 * Enable – a flag to enable the protection;
472 * Maximum voltage, V;
473 * Minimum voltage, V;
474 * Voltage hysteresis – a hysteresis value to clear the error, V;
475 * Delay before setting the error, second;
476 * Delay before clearing the error, second;
477 * Lock – a flag to block the error until the device is restarted.
478
479 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
480
481 Error generation conditions:
482
483 * 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;
484 * 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.
485
486 Conditions for removing the error:
487
488 * 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.
489
490 (% class="box warningmessage" %)
491 (((
492 If there is the “Current sensor error”, the **“Critical error” **is generated.
493 )))
494
495 === Power switch ===
496
497 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:
498
499 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
500
501 In this section:
502
503 * Delay before clearing the error, second;
504 * Lock – a flag to block the error until the device is restarted.
505
506 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.
507
508 (% class="box warningmessage" %)
509 (((
510 If there is the "Power switch error", the **“Critical error” **is generated.
511 )))
512
513 === Power fault ===
514
515 BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
516
517 (% class="box infomessage" %)
518 (((
519 **Note:** this error can be configured only under** "Service" account**.
520 )))
521
522 To change the parameters of the power fault error, select the "Protections → Power fault" section:
523
524 [[image:1739284154410-676.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
525
526 In this section:
527
528 * Enable – a flag to enable the protection;
529 * Delay before setting the error, millisecond;
530 * Time to keep power off, millisecond;
531 * Delay before clearing the error, millisecond;
532 * Lock – a flag to block the error until the device is restarted.
533
534 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.
535
536 Error is removed when the power consumption is normal during “Delay before clearing the error” time.
537
538 (% class="box warningmessage" %)
539 (((
540 If there is the "Power fault", the **“Critical error” **is generated.
541 )))
542
543 === Charge contactor cycles ===
544
545 The BMS Main 3 device protects the charging contactor against frequent switching.
546
547 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
548
549 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
550
551 In this section:
552
553 * Enable – a flag to enable the protection;
554 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
555 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
556 * Delay before setting the error, millisecond;
557 * Delay before clearing the error, second;
558 * Lock – a flag to block the error until the device is restarted.
559
560 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
561
562 Error generation conditions:
563
564 * 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.
565
566 Conditions for removing the error:
567
568 * the “Delay before clearing the error” time has passed since the error was generated.
569
570 === Discharge contactor cycles ===
571
572 The BMS Main 3 device protects the discharging contactor against frequent switching.
573
574 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
575
576 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
577
578 In this section:
579
580 * Enable – a flag to enable the protection;
581 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
582 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
583 * Delay before setting the error, millisecond;
584 * Delay before clearing the error, second;
585 * Lock – a flag to block the error until the device is restarted.
586
587 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
588
589 Error generation conditions:
590
591 * 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.
592
593 Conditions for removing the error:
594
595 * the “Delay before clearing the error” time has passed since the error was generated.
596
597 === Temperature sensors ===
598
599 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
600
601 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
602
603 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
604
605 In this section:
606
607 * Enable – a flag to enable the protection;
608 * Delay before setting the error, millisecond;
609 * Delay before clearing the error, second;
610 * Lock – a flag to block the error until the device is restarted.
611
612 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.
613
614 (% class="box warningmessage" %)
615 (((
616 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated.
617 )))
618
619 === WDT reset ===
620
621 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.
622
623 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
624
625 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
626
627 In this section:
628
629 * Enable – a flag to enable the protection;
630 * Delay before clearing the error, second;
631 * Lock – a flag to block the error until the device is restarted.
632
633 Conditions for removing the error:
634
635 * the “Delay before clearing the error” time has passed from the device startup.
636
637 (% class="box warningmessage" %)
638 (((
639 If there is the "WDT reset" error, the **“Critical error” **is generated.
640 )))
641
642 === Unallowable charging ===
643
644 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
645
646 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
647
648 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
649
650 In this section:
651
652 * Enable – a flag to enable the protection;
653 * Delay before setting the error, second;
654 * Delay before clearing the error, second;
655 * Lock – a flag to block the error until the device is restarted.
656
657 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
658
659 Error generation conditions:
660
661 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
662
663 Conditions for removing the error:
664
665 * the battery current is zero during the “Delay before clearing the error” time.
666
667 === Stuck contactor ===
668
669 The BMS Main 3 device protects contactors against sticking.
670
671 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
672
673 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
674
675 In this section:
676
677 * Enable – a flag to enable the protection;
678 * Delay before setting the error, millisecond;
679 * Delay before clearing the error, second;
680 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
681 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
682 * Lock – a flag to block the error until the device is restarted.
683
684 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
685
686 * 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”.
687
688 (% class="box warningmessage" %)
689 (((
690 If there is the “Stuck contactor” error, the **“Critical error” **is generated.
691 )))
692
693 === Contactor feedback ===
694
695 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.
696
697 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
698
699 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
700
701 In this section:
702
703 * Enable – a flag to enable the protection;
704 * Delay before setting the error, millisecond;
705 * Delay before clearing the error, second;
706 * Lock – a flag to block the error until the device is restarted.
707
708 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
709
710 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
711
712 (% class="box warningmessage" %)
713 (((
714 If there is the “Contactor feedback” error, the **“Critical error” **is generated.
715 )))
716
717 === Insulation ===
718
719 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.
720
721 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
722
723 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
724
725 In this section:
726
727 * Enable – a flag to enable the protection;
728 * Checking algorithm – isolation checking mode:
729 ** Always on – check is always performed;
730 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
731 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
732 * Delay before setting the error, second;
733 * Delay before clearing the error, second;
734 * Lock – a flag to block the error until the device is restarted.
735
736 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.
737
738 (% class="box warningmessage" %)
739 (((
740 If there is the “Insulation fault”, the **“Critical error”** is generated.
741 )))
742
743 === HVIL ===
744
745 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.
746
747 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
748
749 [[image:1735224839441-185.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
750
751 In this section:
752
753 * Enable – a flag to enable the protection;
754 * Source is OFF: Lower current limit, A;
755 * Source is OFF: Upper current limit, A;
756 * Source is ON: Lower current limit, A;
757 * Source is ON: Upper current limit, A;
758 * Lock – a flag to block the error until the device is restarted.
759
760 If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated.
761
762 Error clears if interlock loop is being restored.
763
764 (% class="box warningmessage" %)
765 (((
766 If there is the “HVIL error”, the **“Critical error”** is generated.
767 )))
768
769 === Critical error ===
770
771 Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
772
773 To change the critical error parameters, select the "Protections → Critical error" section:
774
775 [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
776
777 In this section:
778
779 * Enable – a flag to enable the protection;
780 * Delay before setting the error, millisecond;
781 * Delay before clearing the error, second;
782 * Lock – a flag to block the error until the device is restarted.
783
784 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.
785
786 The “Critical error" signal is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
787
788 === General error ===
789
790 To change the general error parameters, select the "Protections → Critical error" section:
791
792 [[image:1735224942262-497.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
793
794 In this section:
795
796 * Enable – a flag to enable the protection;
797 * Delay before setting the error, millisecond;
798 * Delay before clearing the error, second;
799 * Lock – a flag to block the error until the device is restarted;
800 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
801
802 The “General error”is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
803
804 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
805
806 (% class="box infomessage" %)
807 (((
808 The state of the “General error” can be assigned to a discrete output or to a power switch.
809 )))