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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:1733328382376-958.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" 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 TBA
48
49 === Discharge current limit ===
50
51 TBA
52
53 === Undervoltage ===
54
55 The BMS Main 3 device implements battery protection from too low voltage on the cells.
56
57 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
58
59 [[image:1733328382380-760.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
60
61 In this section:
62
63 * Enable – a flag to enable the protection;
64 * Minimum cell voltage, V;
65 * Tolerant cell voltage, V;
66 * Delay before setting the error, millisecond;
67 * Delay before clearing the error, second;
68 * Lock – a flag to block the error until the device is restarted.
69
70 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
71
72 Error generation conditions:
73
74 * 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.
75
76 Conditions for removing the error:
77
78 * 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.
79
80 (% class="box infomessage" %)
81 (((
82 If there is the "Undervoltage" error, the **discharging **contactor opens.
83 )))
84
85 === Overvoltage ===
86
87 The BMS Main 3 device implements battery protection from too high voltage on the cells.
88
89 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
90
91 [[image:1733328382382-607.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
92
93 In this section:
94
95 * Enable – a flag to enable the protection;
96 * Maximum cell voltage, V;
97 * Tolerant cell voltage, V;
98 * Delay before setting the error, millisecond;
99 * Delay before clearing the error, second;
100 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Overvoltage" error is generated;
101 * Lock – a flag to block the error until the device is restarted.
102
103 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
104
105 Error generation conditions:
106
107 * 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.
108
109 Conditions for removing the error:
110
111 * 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.
112
113 (% class="box infomessage" %)
114 (((
115 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).
116 )))
117
118 === Low temperature ===
119
120 The BMS Main 3 device implements battery protection from too low temperature.
121
122 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
123
124 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
125
126 In this section:
127
128 * Enable – a flag to enable the protection;
129 * Minimum charge temperature, °C;
130 * Tolerant charge temperature, °C;
131 * Minimum discharge temperature, °C;
132 * Tolerant discharge temperature, °C;
133 * Delay before setting the error, millisecond;
134 * Delay before clearing the error, second;
135 * Lock – a flag to block the error until the device is restarted.
136
137 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.
138
139 Error generation conditions:
140
141 * 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.
142
143 Conditions for removing the error:
144
145 * 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.
146
147 (% class="box infomessage" %)
148 (((
149 If there is the "Low temperature (CH)" error, the **charging **contactor opens.
150 If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
151 )))
152
153 === High temperature ===
154
155 The BMS Main 3 device implements battery protection from too high temperature.
156
157 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
158
159 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
160
161 In this section:
162
163 * Enable – a flag to enable the protection;
164 * Maximum charge temperature, °C;
165 * Tolerant charge temperature, °C;
166 * Maximum discharge temperature, °C;
167 * Tolerant discharge temperature, °C;
168 * Delay before setting the error, millisecond;
169 * Delay before clearing the error, second;
170 * Lock – a flag to block the error until the device is restarted.
171
172 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
173
174 Error generation conditions:
175
176 * 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.
177
178 Conditions for removing the error:
179
180 * 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.
181
182 (% class="box infomessage" %)
183 (((
184 If there is the "High temperature (CH)" error, the **charging **contactor opens.
185 If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
186 )))
187
188 === Battery cover ===
189
190 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
191
192 [[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
193
194 In this section:
195
196 * Enable – a flag to enable the protection;
197 * Delay before setting the error, millisecond;
198 * Delay before clearing the error, second;
199 * Lock – a flag to block the error until the device is restarted.
200
201 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
202
203 Error generation conditions:
204
205 * there is a signal from the battery cover during the “Delay before setting the error” time.
206
207 Conditions for removing the error:
208
209 * no signal from the battery cover during the “Delay before clearing the error” time.
210
211 (% class="box warningmessage" %)
212 (((
213 If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
214 )))
215
216 === High humidity ===
217
218 The BMS Main 3 can detect that the battery is operating in high humidity conditions.
219
220 To change the detection parameters, select the "Protections → High humidity" section:
221
222 [[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
223
224 In this section:
225
226 * Enable – a flag to enable the detection;
227 * Maximum humidity, RH%;
228 * Tolerant humidity, RH%;
229 * Delay before setting the error, second;
230 * Delay before clearing the error, second;
231 * Lock the error until the device is reset.
232
233 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
234
235 Error generation conditions:
236
237 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
238
239 Conditions for removing the error:
240
241 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
242
243 (% class="box infomessage" %)
244 (((
245 If there is the "High humidity" error, no action is taken. The error is indicative.
246 )))
247
248 === Water ===
249
250 The BMS Main 3 can protect the battery from working in very high humidity conditions.
251
252 To change the protection parameters, select the "Protections → Water" section:
253
254 [[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
255
256 In this section:
257
258 * Enable – a flag to enable the protection;
259 * Maximum humidity, RH%;
260 * Tolerant humidity, RH%;
261 * Delay before setting the error, second;
262 * Delay before clearing the error, second;
263 * Lock – lock the error until the device is reset.
264
265 As a result of the operation of the battery protection from water, the "Water" error is generated.
266
267 Error generation conditions:
268
269 * the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
270
271 Conditions for removing the error:
272
273 * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
274
275 (% class="box infomessage" %)
276 (((
277 If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
278 )))
279
280 === Logic high temperature ===
281
282 To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
283
284 [[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
285
286 In this section:
287
288 * Enable – a flag to enable the protection;
289 * Maximum temperature, °C;
290 * Tolerant temperature, °C;
291 * Delay before setting the error, second;
292 * Delay before clearing the error, second;
293 * Lock – lock the error until the device is reset.
294
295 As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
296
297 Error generation conditions:
298
299 * a BMS Logic device temperature is higher than the “Maximum temperature” value.
300
301 Conditions for removing the error:
302
303 * a BMS Logic device temperature is less than the “Tolerant temperature” value.
304
305 (% class="box infomessage" %)
306 (((
307 Cell balancing is disabled on Logic devices with high temperature.
308 )))
309
310 === Logic offline ===
311
312 To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
313
314 [[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
315
316 In this section:
317
318 * Enable – a flag to enable the protection;
319 * Lock – lock the error until the device is reset.
320
321 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
322
323 Error generation conditions:
324
325 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
326
327 Conditions for removing the error:
328
329 * all connected BMS Logic devices respond to the commands of the BMS Main device.
330
331 (% class="box warningmessage" %)
332 (((
333 If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
334 )))
335
336 === Cell count ===
337
338 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
339
340 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
341
342 In this section:
343
344 * Enable – a flag to enable the protection;
345 * Number of cells – a number of cells connected to the BMS;
346 * Delay before setting the error, millisecond;
347 * Delay before clearing the error, second;
348 * Lock – a flag to block the error until the device is restarted.
349
350 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
351
352 Error generation conditions:
353
354 * 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.
355
356 Conditions for removing the error:
357
358 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
359
360 (% class="box warningmessage" %)
361 (((
362 If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
363 )))
364
365 === Logic count ===
366
367 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:
368
369 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
370
371 In this section:
372
373 * Enable – a flag to enable the protection;
374 * Logic count – a number of BMS Logic devices connected to the BMS Main;
375 * 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);
376 * Lock – lock the error until the device is reset.
377
378 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.
379
380 Error generation conditions:
381
382 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
383
384 Conditions for removing the error:
385
386 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
387
388 (% class="box warningmessage" %)
389 (((
390 If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
391 )))
392
393 === Short circuit ===
394
395 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.
396
397 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
398
399 [[image:1733328415733-309.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="210" width="800"]]
400
401 In this section:
402
403 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
404 ** Enable – a flag to enable the protection;
405 ** Maximum current, A;
406 ** Delay before setting the error, second;
407 * Switch off the charging contactor on error – a flag to open the charging contactor when the "Short circuit" error occurs;
408 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Short circuit" error occurs;
409 * Delay before clearing the error, second;
410 * Lock – a flag to block the error until the device is restarted.
411
412 If there is a short circuit, the "Short circuit" error is generated.
413
414 Error generation conditions:
415
416 * 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.
417
418 Conditions for removing the error:
419
420 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
421
422 (% class="box infomessage" %)
423 (((
424 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).
425 )))
426
427 === High contactor temperature ===
428
429 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.
430
431 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
432
433 [[image:1733328415734-986.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
434
435 In this section:
436
437 * Enable – a flag to enable the protection;
438 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
439 * Maximum contactor temperature, °C;
440 * Tolerant contactor temperature, °C;
441 * Delay before setting the error, second;
442 * Switch off the charging contactor on error – a flag to open the charging contactor when the "High contactor temperature" error occurs;
443 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "High contactor temperature" error occurs;
444 * Delay before clearing the error, second;
445 * Lock – a flag to block the error until the device is restarted.
446
447 If there is a contactor overheat, the "High contactor temperature" error is generated.
448
449 Error generation conditions:
450
451 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
452
453 Conditions for removing the error:
454
455 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
456
457 (% class="box infomessage" %)
458 (((
459 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).
460 )))
461
462 === Current sensor ===
463
464 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.
465
466 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
467
468 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
469
470 In this section:
471
472 * Enable – a flag to enable the protection;
473 * Maximum voltage, V;
474 * Minimum voltage, V;
475 * Voltage hysteresis – a hysteresis value to clear the error, V;
476 * Delay before setting the error, second;
477 * Delay before clearing the error, second;
478 * Lock – a flag to block the error until the device is restarted.
479
480 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
481
482 Error generation conditions:
483
484 * 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;
485 * 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.
486
487 Conditions for removing the error:
488
489 * 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.
490
491 (% class="box warningmessage" %)
492 (((
493 If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
494 )))
495
496 === Power switch ===
497
498 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:
499
500 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
501
502 In this section:
503
504 * Delay before clearing the error, second;
505 * Lock – a flag to block the error until the device is restarted.
506
507 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.
508
509 (% class="box warningmessage" %)
510 (((
511 If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
512 )))
513
514 === Power fault ===
515
516 TBA
517
518 === Charge contactor cycles ===
519
520 The BMS Main 3 device protects the charging contactor against frequent switching.
521
522 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
523
524 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
525
526 In this section:
527
528 * Enable – a flag to enable the protection;
529 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
530 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
531 * Delay before setting the error, millisecond;
532 * Delay before clearing the error, second;
533 * Lock – a flag to block the error until the device is restarted.
534
535 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
536
537 Error generation conditions:
538
539 * 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.
540
541 Conditions for removing the error:
542
543 * the “Delay before clearing the error” time has passed since the error was generated.
544
545 (% class="box infomessage" %)
546 (((
547 If there is the "CH contactor cycles error" error, the **charging **contactor opens.
548 )))
549
550 === Discharge contactor cycles ===
551
552 The BMS Main 3 device protects the discharging contactor against frequent switching.
553
554 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
555
556 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
557
558 In this section:
559
560 * Enable – a flag to enable the protection;
561 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
562 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
563 * Delay before setting the error, millisecond;
564 * Delay before clearing the error, second;
565 * Lock – a flag to block the error until the device is restarted.
566
567 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
568
569 Error generation conditions:
570
571 * 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.
572
573 Conditions for removing the error:
574
575 * the “Delay before clearing the error” time has passed since the error was generated.
576
577 (% class="box infomessage" %)
578 (((
579 If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
580 )))
581
582 === Temperature sensors ===
583
584 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
585
586 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
587
588 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
589
590 In this section:
591
592 * Enable – a flag to enable the protection;
593 * Delay before setting the error, millisecond;
594 * Delay before clearing the error, second;
595 * Lock – a flag to block the error until the device is restarted.
596
597 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.
598
599 (% class="box warningmessage" %)
600 (((
601 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
602 )))
603
604 === WDT reset ===
605
606 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.
607
608 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
609
610 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
611
612 In this section:
613
614 * Enable – a flag to enable the protection;
615 * Delay before clearing the error, second;
616 * Lock – a flag to block the error until the device is restarted.
617
618 Conditions for removing the error:
619
620 * the “Delay before clearing the error” time has passed from the device startup.
621
622 (% class="box warningmessage" %)
623 (((
624 If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
625 )))
626
627 === Unallowable charging ===
628
629 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
630
631 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
632
633 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
634
635 In this section:
636
637 * Enable – a flag to enable the protection;
638 * Delay before setting the error, second;
639 * Delay before clearing the error, second;
640 * Lock – a flag to block the error until the device is restarted.
641
642 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
643
644 Error generation conditions:
645
646 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
647
648 Conditions for removing the error:
649
650 * the battery current is zero during the “Delay before clearing the error” time.
651
652 (% class="box infomessage" %)
653 (((
654 If there is the "Unallowable charging" error, the **discharging **contactor opens.
655 )))
656
657 === Stuck contactor ===
658
659 The BMS Main 3 device protects contactors against sticking.
660
661 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
662
663 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
664
665 In this section:
666
667 * Enable – a flag to enable the protection;
668 * Delay before setting the error, millisecond;
669 * Delay before clearing the error, second;
670 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
671 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
672 * Lock – a flag to block the error until the device is restarted.
673
674 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
675
676 * 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”.
677
678 (% class="box warningmessage" %)
679 (((
680 If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
681 )))
682
683 === Contactor feedback ===
684
685 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.
686
687 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
688
689 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
690
691 In this section:
692
693 * Enable – a flag to enable the protection;
694 * Delay before setting the error, millisecond;
695 * Delay before clearing the error, second;
696 * Lock – a flag to block the error until the device is restarted.
697
698 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
699
700 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
701
702 (% class="box warningmessage" %)
703 (((
704 If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
705 )))
706
707 === Insulation ===
708
709 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.
710
711 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
712
713 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
714
715 In this section:
716
717 * Enable – a flag to enable the protection;
718 * Checking algorithm – isolation checking mode:
719 ** Always on – check is always performed;
720 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
721 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
722 * Delay before setting the error, second;
723 * Delay before clearing the error, second;
724 * Lock – a flag to block the error until the device is restarted.
725
726 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.
727
728 (% class="box warningmessage" %)
729 (((
730 If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
731 )))
732
733 === HVIL ===
734
735 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.
736
737 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
738
739 [[image:1733328487099-371.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="85" width="800"]]
740
741 In this section:
742
743 * Enable – a flag to enable the protection;
744 * Lock – a flag to block the error until the device is restarted.
745
746 If interlock loop breaks, the “HVIL error” is generated. Error clears if interlock loop is being restored.
747
748 (% class="box warningmessage" %)
749 (((
750 If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
751 )))
752
753 === Critical error ===
754
755 To change the critical error parameters, select the "Protections → Critical error" section:
756
757 [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
758
759 In this section:
760
761 * Enable – a flag to enable the protection;
762 * Delay before setting the error, millisecond;
763 * Delay before clearing the error, second;
764 * Lock – a flag to block the error until the device is restarted.
765
766 The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
767
768 * “Battery cover error”;
769 * “Water”;
770 * “Logic offline”;
771 * “Cell count error”;
772 * “ADC error”;
773 * “Current sensor error”;
774 * “Shunt offline”;
775 * “Shunt error”;
776 * “WDT reset”
777 * “No temp. sensors”;
778 * “Temperature sensor shorted”;
779 * “Stuck contactor”;
780 * “CH contactor feedback error”;
781 * “DCH contactor feedback error”;
782 * “Insulation fault”;
783 * “PCH contactor feedback error”;
784 * “CH/DCH contactor feedback error”;
785 * “Main contactor feedback error”;
786 * “High voltage fault”;
787 * “Power switch error”;
788 * “HVIL error”l
789 * “Power fault”.
790
791 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
792
793 (% class="box infomessage" %)
794 (((
795 If there is the “Critical error”, **all **contactors open.
796 )))
797
798 === General error ===
799
800 To change the general error parameters, select the "Protections → Critical error" section:
801
802 [[image:1733328487101-216.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="262" width="800"]]
803
804 In this section:
805
806 * Enable – a flag to enable the protection;
807 * Delay before setting the error, millisecond;
808 * Delay before clearing the error, second;
809 * Lock – a flag to block the error until the device is restarted;
810 * Check: <error> – a flags to enable check of corresponding errors.
811
812 The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
813
814 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
815
816 (% class="box infomessage" %)
817 (((
818 The state of the “General error” can be output to a discrete output or a power switch.
819 )))