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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 === Overcurrent ===
10
11 The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
12
13 To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
14
15 [[image:1735224601506-488.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
16
17 In this section:
18
19 * Enable – a flag to enable the protection;
20 * Maximum charging current, А;
21 * Tolerant charging current, А;
22 * Maximum discharging current, А;
23 * Tolerant discharging current, А;
24 * Delay before setting the error, millisecond;
25 * Delay before clearing the error, second;
26 * Lock – a flag to block the error until the device is restarted.
27
28 As a result of operation of the overcurrent protection, the "Overcurrent" error is generated.
29
30 Error generation conditions:
31
32 * 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;
33 * 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.
34
35 Conditions for removing the error:
36
37 * 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;
38 * 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.
39
40 (% class="box infomessage" %)
41 (((
42 If there is the "Overcurrent" error, the **charging **and **discharging **contactors open.
43 )))
44
45 === Charge current limit ===
46
47 The BMS Main 3 device can check the charging current with the limit based on the Charge map. If current is more than estimated maximum, "Current limit" error is generated.
48
49 To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
50
51 [[image:1735225207687-430.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
52
53 * Enable – a flag to enable the protection;
54 * Threshold to switch from Region 1 to Region 2
55 *
56
57
58 === Discharge current limit ===
59
60 TBA
61
62 === Undervoltage ===
63
64 The BMS Main 3 device implements battery protection from too low voltage on the cells.
65
66 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
67
68 [[image:1735224224155-829.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
69
70 In this section:
71
72 * Enable – a flag to enable the protection;
73 * Minimum cell voltage, V;
74 * Tolerant cell voltage, V;
75 * Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
76 * Delay before setting the error, millisecond;
77 * Delay before clearing the error, second;
78 * Lock – a flag to block the error until the device is restarted.
79
80 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
81
82 Error generation conditions:
83
84 * 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.
85
86 Conditions for removing the error:
87
88 * 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.
89
90 (% class="box infomessage" %)
91 (((
92 If there is the "Undervoltage" error, the **discharging **contactor opens.
93 )))
94
95 === Overvoltage ===
96
97 The BMS Main 3 device implements battery protection from too high voltage on the cells.
98
99 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
100
101 [[image:1735224377252-473.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
102
103 In this section:
104
105 * Enable – a flag to enable the protection;
106 * Maximum cell voltage, V;
107 * Tolerant cell voltage, V;
108 * Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
109 * Delay before setting the error, millisecond;
110 * Delay before clearing the error, second;
111 * Lock – a flag to block the error until the device is restarted.
112
113 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
114
115 Error generation conditions:
116
117 * 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.
118
119 Conditions for removing the error:
120
121 * 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.
122
123 (% class="box infomessage" %)
124 (((
125 If there is the "Overvoltage" error, the **charging** contactor and **discharging **contactor open (if the “Switch off the discharging contactor on error” flag is set).
126 )))
127
128 === Low temperature ===
129
130 The BMS Main 3 device implements battery protection from too low temperature.
131
132 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
133
134 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
135
136 In this section:
137
138 * Enable – a flag to enable the protection;
139 * Minimum charge temperature, °C;
140 * Tolerant charge temperature, °C;
141 * Minimum discharge temperature, °C;
142 * Tolerant discharge temperature, °C;
143 * Delay before setting the error, millisecond;
144 * Delay before clearing the error, second;
145 * Lock – a flag to block the error until the device is restarted.
146
147 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.
148
149 Error generation conditions:
150
151 * 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.
152
153 Conditions for removing the error:
154
155 * 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.
156
157 (% class="box infomessage" %)
158 (((
159 If there is the "Low temperature (CH)" error, the **charging **contactor opens.
160 If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
161 )))
162
163 === High temperature ===
164
165 The BMS Main 3 device implements battery protection from too high temperature.
166
167 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
168
169 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
170
171 In this section:
172
173 * Enable – a flag to enable the protection;
174 * Maximum charge temperature, °C;
175 * Tolerant charge temperature, °C;
176 * Maximum discharge temperature, °C;
177 * Tolerant discharge temperature, °C;
178 * Delay before setting the error, millisecond;
179 * Delay before clearing the error, second;
180 * Lock – a flag to block the error until the device is restarted.
181
182 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
183
184 Error generation conditions:
185
186 * 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.
187
188 Conditions for removing the error:
189
190 * 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.
191
192 (% class="box infomessage" %)
193 (((
194 If there is the "High temperature (CH)" error, the **charging **contactor opens.
195 If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
196 )))
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 **and all contactors open.**
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 infomessage" %)
286 (((
287 If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
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:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
325
326 In this section:
327
328 * Enable – a flag to enable the protection;
329 * Lock – lock the error until the device is reset.
330
331 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
332
333 Error generation conditions:
334
335 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
336
337 Conditions for removing the error:
338
339 * all connected BMS Logic devices respond to the commands of the BMS Main device.
340
341 (% class="box warningmessage" %)
342 (((
343 If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
344 )))
345
346 === Cell count ===
347
348 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
349
350 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
351
352 In this section:
353
354 * Enable – a flag to enable the protection;
355 * Number of cells – a number of cells connected to the BMS;
356 * Delay before setting the error, millisecond;
357 * Delay before clearing the error, second;
358 * Lock – a flag to block the error until the device is restarted.
359
360 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
361
362 Error generation conditions:
363
364 * 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.
365
366 Conditions for removing the error:
367
368 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
369
370 (% class="box warningmessage" %)
371 (((
372 If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
373 )))
374
375 === Logic count ===
376
377 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:
378
379 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
380
381 In this section:
382
383 * Enable – a flag to enable the protection;
384 * Logic count – a number of BMS Logic devices connected to the BMS Main;
385 * 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);
386 * Lock – lock the error until the device is reset.
387
388 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.
389
390 Error generation conditions:
391
392 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
393
394 Conditions for removing the error:
395
396 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
397
398 (% class="box warningmessage" %)
399 (((
400 If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
401 )))
402
403 === Short circuit ===
404
405 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.
406
407 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
408
409 [[image:1735224667621-969.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
410
411 In this section:
412
413 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
414 ** Enable – a flag to enable the protection;
415 ** Maximum current, A;
416 ** Delay before setting the error, second;
417 * Delay before clearing the error, second;
418 * Lock – a flag to block the error until the device is restarted.
419
420 If there is a short circuit, the "Short circuit" error is generated.
421
422 Error generation conditions:
423
424 * 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.
425
426 Conditions for removing the error:
427
428 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
429
430 (% class="box infomessage" %)
431 (((
432 If there is the "Short circuit" error, **charging **contactor opens (if the “Switch off the charging contactor on error” flag is set) and **discharging **contactor opens (if the “Switch off the discharging contactor on error flag” is set).
433 )))
434
435 === High contactor temperature ===
436
437 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.
438
439 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
440
441 [[image:1735224706573-347.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
442
443 In this section:
444
445 * Enable – a flag to enable the protection;
446 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
447 * Maximum contactor temperature, °C;
448 * Tolerant contactor temperature, °C;
449 * Delay before setting the error, second;
450 * Delay before clearing the error, second;
451 * Lock – a flag to block the error until the device is restarted.
452
453 If there is a contactor overheat, the "High contactor temperature" error is generated.
454
455 Error generation conditions:
456
457 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
458
459 Conditions for removing the error:
460
461 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
462
463 (% class="box infomessage" %)
464 (((
465 If there is the "High contactor temperature" error, **charging **contactor opens (if the “Switch off the charging contactor on error” flag is set) and **discharging **contactor opens (if the “Switch off the discharging contactor on error” flag is set).
466 )))
467
468 === Current sensor ===
469
470 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.
471
472 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
473
474 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
475
476 In this section:
477
478 * Enable – a flag to enable the protection;
479 * Maximum voltage, V;
480 * Minimum voltage, V;
481 * Voltage hysteresis – a hysteresis value to clear the error, V;
482 * Delay before setting the error, second;
483 * Delay before clearing the error, second;
484 * Lock – a flag to block the error until the device is restarted.
485
486 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
487
488 Error generation conditions:
489
490 * 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;
491 * 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.
492
493 Conditions for removing the error:
494
495 * 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.
496
497 (% class="box warningmessage" %)
498 (((
499 If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
500 )))
501
502 === Power switch ===
503
504 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:
505
506 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
507
508 In this section:
509
510 * Delay before clearing the error, second;
511 * Lock – a flag to block the error until the device is restarted.
512
513 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.
514
515 (% class="box warningmessage" %)
516 (((
517 If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
518 )))
519
520 === Power fault ===
521
522 TBA
523
524 === Charge contactor cycles ===
525
526 The BMS Main 3 device protects the charging contactor against frequent switching.
527
528 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
529
530 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
531
532 In this section:
533
534 * Enable – a flag to enable the protection;
535 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
536 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
537 * Delay before setting the error, millisecond;
538 * Delay before clearing the error, second;
539 * Lock – a flag to block the error until the device is restarted.
540
541 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
542
543 Error generation conditions:
544
545 * 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.
546
547 Conditions for removing the error:
548
549 * the “Delay before clearing the error” time has passed since the error was generated.
550
551 (% class="box infomessage" %)
552 (((
553 If there is the "CH contactor cycles error" error, the **charging **contactor opens.
554 )))
555
556 === Discharge contactor cycles ===
557
558 The BMS Main 3 device protects the discharging contactor against frequent switching.
559
560 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
561
562 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
563
564 In this section:
565
566 * Enable – a flag to enable the protection;
567 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
568 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
569 * Delay before setting the error, millisecond;
570 * Delay before clearing the error, second;
571 * Lock – a flag to block the error until the device is restarted.
572
573 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
574
575 Error generation conditions:
576
577 * 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.
578
579 Conditions for removing the error:
580
581 * the “Delay before clearing the error” time has passed since the error was generated.
582
583 (% class="box infomessage" %)
584 (((
585 If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
586 )))
587
588 === Temperature sensors ===
589
590 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
591
592 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
593
594 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
595
596 In this section:
597
598 * Enable – a flag to enable the protection;
599 * Delay before setting the error, millisecond;
600 * Delay before clearing the error, second;
601 * Lock – a flag to block the error until the device is restarted.
602
603 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.
604
605 (% class="box warningmessage" %)
606 (((
607 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
608 )))
609
610 === WDT reset ===
611
612 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.
613
614 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
615
616 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
617
618 In this section:
619
620 * Enable – a flag to enable the protection;
621 * Delay before clearing the error, second;
622 * Lock – a flag to block the error until the device is restarted.
623
624 Conditions for removing the error:
625
626 * the “Delay before clearing the error” time has passed from the device startup.
627
628 (% class="box warningmessage" %)
629 (((
630 If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
631 )))
632
633 === Unallowable charging ===
634
635 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
636
637 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
638
639 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
640
641 In this section:
642
643 * Enable – a flag to enable the protection;
644 * Delay before setting the error, second;
645 * Delay before clearing the error, second;
646 * Lock – a flag to block the error until the device is restarted.
647
648 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
649
650 Error generation conditions:
651
652 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
653
654 Conditions for removing the error:
655
656 * the battery current is zero during the “Delay before clearing the error” time.
657
658 (% class="box infomessage" %)
659 (((
660 If there is the "Unallowable charging" error, the **discharging **contactor opens.
661 )))
662
663 === Stuck contactor ===
664
665 The BMS Main 3 device protects contactors against sticking.
666
667 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
668
669 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
670
671 In this section:
672
673 * Enable – a flag to enable the protection;
674 * Delay before setting the error, millisecond;
675 * Delay before clearing the error, second;
676 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
677 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
678 * Lock – a flag to block the error until the device is restarted.
679
680 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
681
682 * 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”.
683
684 (% class="box warningmessage" %)
685 (((
686 If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
687 )))
688
689 === Contactor feedback ===
690
691 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.
692
693 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
694
695 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
696
697 In this section:
698
699 * Enable – a flag to enable the protection;
700 * Delay before setting the error, millisecond;
701 * Delay before clearing the error, second;
702 * Lock – a flag to block the error until the device is restarted.
703
704 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
705
706 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
707
708 (% class="box warningmessage" %)
709 (((
710 If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
711 )))
712
713 === Insulation ===
714
715 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.
716
717 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
718
719 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
720
721 In this section:
722
723 * Enable – a flag to enable the protection;
724 * Checking algorithm – isolation checking mode:
725 ** Always on – check is always performed;
726 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
727 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
728 * Delay before setting the error, second;
729 * Delay before clearing the error, second;
730 * Lock – a flag to block the error until the device is restarted.
731
732 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.
733
734 (% class="box warningmessage" %)
735 (((
736 If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
737 )))
738
739 === HVIL ===
740
741 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.
742
743 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
744
745 [[image:1735224839441-185.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
746
747 In this section:
748
749 * Enable – a flag to enable the protection;
750 * Source is OFF: Lower current limit, A;
751 * Source is OFF: Upper current limit, A;
752 * Source is ON: Lower current limit, A;
753 * Source is ON: Upper current limit, A;
754 * Lock – a flag to block the error until the device is restarted.
755
756 If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated. Error clears if interlock loop is being restored.
757
758 (% class="box warningmessage" %)
759 (((
760 If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
761 )))
762
763 === Critical error ===
764
765 To change the critical error parameters, select the "Protections → Critical error" section:
766
767 [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
768
769 In this section:
770
771 * Enable – a flag to enable the protection;
772 * Delay before setting the error, millisecond;
773 * Delay before clearing the error, second;
774 * Lock – a flag to block the error until the device is restarted.
775
776 The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
777
778 * “Battery cover error”;
779 * “Water”;
780 * “Logic offline”;
781 * “Cell count error”;
782 * “ADC error”;
783 * “Current sensor error”;
784 * “Shunt offline”;
785 * “Shunt error”;
786 * “WDT reset”
787 * “No temp. sensors”;
788 * “Temperature sensor shorted”;
789 * “Stuck contactor”;
790 * “CH contactor feedback error”;
791 * “DCH contactor feedback error”;
792 * “Insulation fault”;
793 * “PCH contactor feedback error”;
794 * “CH/DCH contactor feedback error”;
795 * “Main contactor feedback error”;
796 * “High voltage fault”;
797 * “Power switch error”;
798 * “HVIL error”l
799 * “Power fault”.
800
801 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
802
803 (% class="box infomessage" %)
804 (((
805 If there is the “Critical error”, **all **contactors open.
806 )))
807
808 === General error ===
809
810 To change the general error parameters, select the "Protections → Critical error" section:
811
812 [[image:1735224942262-497.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
813
814 In this section:
815
816 * Enable – a flag to enable the protection;
817 * Delay before setting the error, millisecond;
818 * Delay before clearing the error, second;
819 * Lock – a flag to block the error until the device is restarted;
820 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
821
822 The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
823
824 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
825
826 (% class="box infomessage" %)
827 (((
828 The state of the “General error” can be output to a discrete output or a power switch.
829 )))