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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 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.
48
49 Current difference is configured by two regions separated by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
50
51 To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
52
53 [[image:1735225207687-430.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
54
55 * Enable – a flag to enable the protection;
56 * Threshold to switch from Region 1 to Region 2
57 *
58
59
60 === Discharge current limit ===
61
62 TBA
63
64 === Undervoltage ===
65
66 The BMS Main 3 device implements battery protection from too low voltage on the cells.
67
68 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
69
70 [[image:1735224224155-829.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
71
72 In this section:
73
74 * Enable – a flag to enable the protection;
75 * Minimum cell voltage, V;
76 * Tolerant cell voltage, V;
77 * 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;
78 * Delay before setting the error, millisecond;
79 * Delay before clearing the error, second;
80 * Lock – a flag to block the error until the device is restarted.
81
82 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
83
84 Error generation conditions:
85
86 * 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.
87
88 Conditions for removing the error:
89
90 * 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.
91
92 (% class="box infomessage" %)
93 (((
94 If there is the "Undervoltage" error, the **discharging **contactor opens.
95 )))
96
97 === Overvoltage ===
98
99 The BMS Main 3 device implements battery protection from too high voltage on the cells.
100
101 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
102
103 [[image:1735224377252-473.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
104
105 In this section:
106
107 * Enable – a flag to enable the protection;
108 * Maximum cell voltage, V;
109 * Tolerant cell voltage, V;
110 * 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;
111 * Delay before setting the error, millisecond;
112 * Delay before clearing the error, second;
113 * Lock – a flag to block the error until the device is restarted.
114
115 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
116
117 Error generation conditions:
118
119 * 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.
120
121 Conditions for removing the error:
122
123 * 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.
124
125 (% class="box infomessage" %)
126 (((
127 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).
128 )))
129
130 === Low temperature ===
131
132 The BMS Main 3 device implements battery protection from too low temperature.
133
134 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
135
136 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
137
138 In this section:
139
140 * Enable – a flag to enable the protection;
141 * Minimum charge temperature, °C;
142 * Tolerant charge temperature, °C;
143 * Minimum discharge temperature, °C;
144 * Tolerant discharge temperature, °C;
145 * Delay before setting the error, millisecond;
146 * Delay before clearing the error, second;
147 * Lock – a flag to block the error until the device is restarted.
148
149 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.
150
151 Error generation conditions:
152
153 * 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.
154
155 Conditions for removing the error:
156
157 * 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.
158
159 (% class="box infomessage" %)
160 (((
161 If there is the "Low temperature (CH)" error, the **charging **contactor opens.
162 If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
163 )))
164
165 === High temperature ===
166
167 The BMS Main 3 device implements battery protection from too high temperature.
168
169 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
170
171 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
172
173 In this section:
174
175 * Enable – a flag to enable the protection;
176 * Maximum charge temperature, °C;
177 * Tolerant charge temperature, °C;
178 * Maximum discharge temperature, °C;
179 * Tolerant discharge temperature, °C;
180 * Delay before setting the error, millisecond;
181 * Delay before clearing the error, second;
182 * Lock – a flag to block the error until the device is restarted.
183
184 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
185
186 Error generation conditions:
187
188 * 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.
189
190 Conditions for removing the error:
191
192 * 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.
193
194 (% class="box infomessage" %)
195 (((
196 If there is the "High temperature (CH)" error, the **charging **contactor opens.
197 If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
198 )))
199
200 === Battery cover ===
201
202 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
203
204 [[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
205
206 In this section:
207
208 * Enable – a flag to enable the protection;
209 * Delay before setting the error, millisecond;
210 * Delay before clearing the error, second;
211 * Lock – a flag to block the error until the device is restarted.
212
213 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
214
215 Error generation conditions:
216
217 * there is a signal from the battery cover during the “Delay before setting the error” time.
218
219 Conditions for removing the error:
220
221 * no signal from the battery cover during the “Delay before clearing the error” time.
222
223 (% class="box warningmessage" %)
224 (((
225 If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
226 )))
227
228 === High humidity ===
229
230 The BMS Main 3 can detect that the battery is operating in high humidity conditions.
231
232 To change the detection parameters, select the "Protections → High humidity" section:
233
234 [[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
235
236 In this section:
237
238 * Enable – a flag to enable the detection;
239 * Maximum humidity, RH%;
240 * Tolerant humidity, RH%;
241 * Delay before setting the error, second;
242 * Delay before clearing the error, second;
243 * Lock the error until the device is reset.
244
245 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
246
247 Error generation conditions:
248
249 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
250
251 Conditions for removing the error:
252
253 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
254
255 (% class="box infomessage" %)
256 (((
257 If there is the "High humidity" error, no action is taken. The error is indicative.
258 )))
259
260 === Water ===
261
262 The BMS Main 3 can protect the battery from working in very high humidity conditions.
263
264 To change the protection parameters, select the "Protections → Water" section:
265
266 [[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
267
268 In this section:
269
270 * Enable – a flag to enable the protection;
271 * Maximum humidity, RH%;
272 * Tolerant humidity, RH%;
273 * Delay before setting the error, second;
274 * Delay before clearing the error, second;
275 * Lock – lock the error until the device is reset.
276
277 As a result of the operation of the battery protection from water, the "Water" error is generated.
278
279 Error generation conditions:
280
281 * the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
282
283 Conditions for removing the error:
284
285 * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
286
287 (% class="box infomessage" %)
288 (((
289 If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
290 )))
291
292 === Logic high temperature ===
293
294 To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
295
296 [[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
297
298 In this section:
299
300 * Enable – a flag to enable the protection;
301 * Maximum temperature, °C;
302 * Tolerant temperature, °C;
303 * Delay before setting the error, second;
304 * Delay before clearing the error, second;
305 * Lock – lock the error until the device is reset.
306
307 As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
308
309 Error generation conditions:
310
311 * a BMS Logic device temperature is higher than the “Maximum temperature” value.
312
313 Conditions for removing the error:
314
315 * a BMS Logic device temperature is less than the “Tolerant temperature” value.
316
317 (% class="box infomessage" %)
318 (((
319 Cell balancing is disabled on Logic devices with high temperature.
320 )))
321
322 === Logic offline ===
323
324 To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
325
326 [[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
327
328 In this section:
329
330 * Enable – a flag to enable the protection;
331 * Lock – lock the error until the device is reset.
332
333 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
334
335 Error generation conditions:
336
337 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
338
339 Conditions for removing the error:
340
341 * all connected BMS Logic devices respond to the commands of the BMS Main device.
342
343 (% class="box warningmessage" %)
344 (((
345 If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
346 )))
347
348 === Cell count ===
349
350 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
351
352 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
353
354 In this section:
355
356 * Enable – a flag to enable the protection;
357 * Number of cells – a number of cells connected to the BMS;
358 * Delay before setting the error, millisecond;
359 * Delay before clearing the error, second;
360 * Lock – a flag to block the error until the device is restarted.
361
362 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
363
364 Error generation conditions:
365
366 * 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.
367
368 Conditions for removing the error:
369
370 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
371
372 (% class="box warningmessage" %)
373 (((
374 If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
375 )))
376
377 === Logic count ===
378
379 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:
380
381 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
382
383 In this section:
384
385 * Enable – a flag to enable the protection;
386 * Logic count – a number of BMS Logic devices connected to the BMS Main;
387 * 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);
388 * Lock – lock the error until the device is reset.
389
390 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.
391
392 Error generation conditions:
393
394 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
395
396 Conditions for removing the error:
397
398 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
399
400 (% class="box warningmessage" %)
401 (((
402 If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
403 )))
404
405 === Short circuit ===
406
407 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.
408
409 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
410
411 [[image:1735224667621-969.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
412
413 In this section:
414
415 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
416 ** Enable – a flag to enable the protection;
417 ** Maximum current, A;
418 ** Delay before setting the error, second;
419 * Delay before clearing the error, second;
420 * Lock – a flag to block the error until the device is restarted.
421
422 If there is a short circuit, the "Short circuit" error is generated.
423
424 Error generation conditions:
425
426 * 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.
427
428 Conditions for removing the error:
429
430 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
431
432 (% class="box infomessage" %)
433 (((
434 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).
435 )))
436
437 === High contactor temperature ===
438
439 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.
440
441 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
442
443 [[image:1735224706573-347.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
444
445 In this section:
446
447 * Enable – a flag to enable the protection;
448 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
449 * Maximum contactor temperature, °C;
450 * Tolerant contactor temperature, °C;
451 * Delay before setting the error, second;
452 * Delay before clearing the error, second;
453 * Lock – a flag to block the error until the device is restarted.
454
455 If there is a contactor overheat, the "High contactor temperature" error is generated.
456
457 Error generation conditions:
458
459 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
460
461 Conditions for removing the error:
462
463 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
464
465 (% class="box infomessage" %)
466 (((
467 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).
468 )))
469
470 === Current sensor ===
471
472 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.
473
474 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
475
476 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
477
478 In this section:
479
480 * Enable – a flag to enable the protection;
481 * Maximum voltage, V;
482 * Minimum voltage, V;
483 * Voltage hysteresis – a hysteresis value to clear the error, V;
484 * Delay before setting the error, second;
485 * Delay before clearing the error, second;
486 * Lock – a flag to block the error until the device is restarted.
487
488 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
489
490 Error generation conditions:
491
492 * 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;
493 * 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.
494
495 Conditions for removing the error:
496
497 * 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.
498
499 (% class="box warningmessage" %)
500 (((
501 If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
502 )))
503
504 === Power switch ===
505
506 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:
507
508 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
509
510 In this section:
511
512 * Delay before clearing the error, second;
513 * Lock – a flag to block the error until the device is restarted.
514
515 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.
516
517 (% class="box warningmessage" %)
518 (((
519 If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
520 )))
521
522 === Power fault ===
523
524 TBA
525
526 === Charge contactor cycles ===
527
528 The BMS Main 3 device protects the charging contactor against frequent switching.
529
530 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
531
532 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
533
534 In this section:
535
536 * Enable – a flag to enable the protection;
537 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
538 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
539 * Delay before setting the error, millisecond;
540 * Delay before clearing the error, second;
541 * Lock – a flag to block the error until the device is restarted.
542
543 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
544
545 Error generation conditions:
546
547 * 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.
548
549 Conditions for removing the error:
550
551 * the “Delay before clearing the error” time has passed since the error was generated.
552
553 (% class="box infomessage" %)
554 (((
555 If there is the "CH contactor cycles error" error, the **charging **contactor opens.
556 )))
557
558 === Discharge contactor cycles ===
559
560 The BMS Main 3 device protects the discharging contactor against frequent switching.
561
562 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
563
564 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
565
566 In this section:
567
568 * Enable – a flag to enable the protection;
569 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
570 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
571 * Delay before setting the error, millisecond;
572 * Delay before clearing the error, second;
573 * Lock – a flag to block the error until the device is restarted.
574
575 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
576
577 Error generation conditions:
578
579 * 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.
580
581 Conditions for removing the error:
582
583 * the “Delay before clearing the error” time has passed since the error was generated.
584
585 (% class="box infomessage" %)
586 (((
587 If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
588 )))
589
590 === Temperature sensors ===
591
592 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
593
594 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
595
596 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
597
598 In this section:
599
600 * Enable – a flag to enable the protection;
601 * Delay before setting the error, millisecond;
602 * Delay before clearing the error, second;
603 * Lock – a flag to block the error until the device is restarted.
604
605 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.
606
607 (% class="box warningmessage" %)
608 (((
609 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
610 )))
611
612 === WDT reset ===
613
614 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.
615
616 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
617
618 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
619
620 In this section:
621
622 * Enable – a flag to enable the protection;
623 * Delay before clearing the error, second;
624 * Lock – a flag to block the error until the device is restarted.
625
626 Conditions for removing the error:
627
628 * the “Delay before clearing the error” time has passed from the device startup.
629
630 (% class="box warningmessage" %)
631 (((
632 If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
633 )))
634
635 === Unallowable charging ===
636
637 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
638
639 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
640
641 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
642
643 In this section:
644
645 * Enable – a flag to enable the protection;
646 * Delay before setting the error, second;
647 * Delay before clearing the error, second;
648 * Lock – a flag to block the error until the device is restarted.
649
650 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
651
652 Error generation conditions:
653
654 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
655
656 Conditions for removing the error:
657
658 * the battery current is zero during the “Delay before clearing the error” time.
659
660 (% class="box infomessage" %)
661 (((
662 If there is the "Unallowable charging" error, the **discharging **contactor opens.
663 )))
664
665 === Stuck contactor ===
666
667 The BMS Main 3 device protects contactors against sticking.
668
669 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
670
671 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
672
673 In this section:
674
675 * Enable – a flag to enable the protection;
676 * Delay before setting the error, millisecond;
677 * Delay before clearing the error, second;
678 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
679 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
680 * Lock – a flag to block the error until the device is restarted.
681
682 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
683
684 * 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”.
685
686 (% class="box warningmessage" %)
687 (((
688 If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
689 )))
690
691 === Contactor feedback ===
692
693 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.
694
695 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
696
697 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
698
699 In this section:
700
701 * Enable – a flag to enable the protection;
702 * Delay before setting the error, millisecond;
703 * Delay before clearing the error, second;
704 * Lock – a flag to block the error until the device is restarted.
705
706 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
707
708 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
709
710 (% class="box warningmessage" %)
711 (((
712 If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
713 )))
714
715 === Insulation ===
716
717 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.
718
719 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
720
721 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
722
723 In this section:
724
725 * Enable – a flag to enable the protection;
726 * Checking algorithm – isolation checking mode:
727 ** Always on – check is always performed;
728 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
729 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
730 * Delay before setting the error, second;
731 * Delay before clearing the error, second;
732 * Lock – a flag to block the error until the device is restarted.
733
734 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.
735
736 (% class="box warningmessage" %)
737 (((
738 If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
739 )))
740
741 === HVIL ===
742
743 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.
744
745 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
746
747 [[image:1735224839441-185.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
748
749 In this section:
750
751 * Enable – a flag to enable the protection;
752 * Source is OFF: Lower current limit, A;
753 * Source is OFF: Upper current limit, A;
754 * Source is ON: Lower current limit, A;
755 * Source is ON: Upper current limit, A;
756 * Lock – a flag to block the error until the device is restarted.
757
758 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.
759
760 (% class="box warningmessage" %)
761 (((
762 If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
763 )))
764
765 === Critical error ===
766
767 To change the critical error parameters, select the "Protections → Critical error" section:
768
769 [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
770
771 In this section:
772
773 * Enable – a flag to enable the protection;
774 * Delay before setting the error, millisecond;
775 * Delay before clearing the error, second;
776 * Lock – a flag to block the error until the device is restarted.
777
778 The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
779
780 * “Battery cover error”;
781 * “Water”;
782 * “Logic offline”;
783 * “Cell count error”;
784 * “ADC error”;
785 * “Current sensor error”;
786 * “Shunt offline”;
787 * “Shunt error”;
788 * “WDT reset”
789 * “No temp. sensors”;
790 * “Temperature sensor shorted”;
791 * “Stuck contactor”;
792 * “CH contactor feedback error”;
793 * “DCH contactor feedback error”;
794 * “Insulation fault”;
795 * “PCH contactor feedback error”;
796 * “CH/DCH contactor feedback error”;
797 * “Main contactor feedback error”;
798 * “High voltage fault”;
799 * “Power switch error”;
800 * “HVIL error”l
801 * “Power fault”.
802
803 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
804
805 (% class="box infomessage" %)
806 (((
807 If there is the “Critical error”, **all **contactors open.
808 )))
809
810 === General error ===
811
812 To change the general error parameters, select the "Protections → Critical error" section:
813
814 [[image:1735224942262-497.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
815
816 In this section:
817
818 * Enable – a flag to enable the protection;
819 * Delay before setting the error, millisecond;
820 * Delay before clearing the error, second;
821 * Lock – a flag to block the error until the device is restarted;
822 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
823
824 The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
825
826 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
827
828 (% class="box infomessage" %)
829 (((
830 The state of the “General error” can be output to a discrete output or a power switch.
831 )))