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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 separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
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 – a current value at which
57 *
58
59
60 === Discharge current limit ===
61
62 The BMS Main 3 device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
63
64 Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
65
66 To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
67
68 [[image:1735225942893-869.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
69
70 In this section:
71
72 * Enable – a flag to enable the protection;
73 * Threshold to switch from Region 1 to Region 2
74
75 === Undervoltage ===
76
77 The BMS Main 3 device implements battery protection from too low voltage on the cells.
78
79 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
80
81 [[image:1735224224155-829.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
82
83 In this section:
84
85 * Enable – a flag to enable the protection;
86 * Minimum cell voltage, V;
87 * Tolerant cell voltage, V;
88 * 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;
89 * Delay before setting the error, millisecond;
90 * Delay before clearing the error, second;
91 * Lock – a flag to block the error until the device is restarted.
92
93 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
94
95 Error generation conditions:
96
97 * 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.
98
99 Conditions for removing the error:
100
101 * 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.
102
103 (% class="box infomessage" %)
104 (((
105 If there is the "Undervoltage" error, the **discharging **contactor opens.
106 )))
107
108 === Overvoltage ===
109
110 The BMS Main 3 device implements battery protection from too high voltage on the cells.
111
112 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
113
114 [[image:1735224377252-473.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
115
116 In this section:
117
118 * Enable – a flag to enable the protection;
119 * Maximum cell voltage, V;
120 * Tolerant cell voltage, V;
121 * 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;
122 * Delay before setting the error, millisecond;
123 * Delay before clearing the error, second;
124 * Lock – a flag to block the error until the device is restarted.
125
126 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
127
128 Error generation conditions:
129
130 * 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.
131
132 Conditions for removing the error:
133
134 * 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.
135
136 (% class="box infomessage" %)
137 (((
138 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).
139 )))
140
141 === Low temperature ===
142
143 The BMS Main 3 device implements battery protection from too low temperature.
144
145 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
146
147 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
148
149 In this section:
150
151 * Enable – a flag to enable the protection;
152 * Minimum charge temperature, °C;
153 * Tolerant charge temperature, °C;
154 * Minimum discharge temperature, °C;
155 * Tolerant discharge temperature, °C;
156 * Delay before setting the error, millisecond;
157 * Delay before clearing the error, second;
158 * Lock – a flag to block the error until the device is restarted.
159
160 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.
161
162 Error generation conditions:
163
164 * 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.
165
166 Conditions for removing the error:
167
168 * 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.
169
170 (% class="box infomessage" %)
171 (((
172 If there is the "Low temperature (CH)" error, the **charging **contactor opens.
173 If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
174 )))
175
176 === High temperature ===
177
178 The BMS Main 3 device implements battery protection from too high temperature.
179
180 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
181
182 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
183
184 In this section:
185
186 * Enable – a flag to enable the protection;
187 * Maximum charge temperature, °C;
188 * Tolerant charge temperature, °C;
189 * Maximum discharge temperature, °C;
190 * Tolerant discharge temperature, °C;
191 * Delay before setting the error, millisecond;
192 * Delay before clearing the error, second;
193 * Lock – a flag to block the error until the device is restarted.
194
195 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
196
197 Error generation conditions:
198
199 * 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.
200
201 Conditions for removing the error:
202
203 * 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.
204
205 (% class="box infomessage" %)
206 (((
207 If there is the "High temperature (CH)" error, the **charging **contactor opens.
208 If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
209 )))
210
211 === Battery cover ===
212
213 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
214
215 [[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
216
217 In this section:
218
219 * Enable – a flag to enable the protection;
220 * Delay before setting the error, millisecond;
221 * Delay before clearing the error, second;
222 * Lock – a flag to block the error until the device is restarted.
223
224 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
225
226 Error generation conditions:
227
228 * there is a signal from the battery cover during the “Delay before setting the error” time.
229
230 Conditions for removing the error:
231
232 * no signal from the battery cover during the “Delay before clearing the error” time.
233
234 (% class="box warningmessage" %)
235 (((
236 If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
237 )))
238
239 === High humidity ===
240
241 The BMS Main 3 can detect that the battery is operating in high humidity conditions.
242
243 To change the detection parameters, select the "Protections → High humidity" section:
244
245 [[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
246
247 In this section:
248
249 * Enable – a flag to enable the detection;
250 * Maximum humidity, RH%;
251 * Tolerant humidity, RH%;
252 * Delay before setting the error, second;
253 * Delay before clearing the error, second;
254 * Lock the error until the device is reset.
255
256 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
257
258 Error generation conditions:
259
260 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
261
262 Conditions for removing the error:
263
264 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
265
266 (% class="box infomessage" %)
267 (((
268 If there is the "High humidity" error, no action is taken. The error is indicative.
269 )))
270
271 === Water ===
272
273 The BMS Main 3 can protect the battery from working in very high humidity conditions.
274
275 To change the protection parameters, select the "Protections → Water" section:
276
277 [[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
278
279 In this section:
280
281 * Enable – a flag to enable the protection;
282 * Maximum humidity, RH%;
283 * Tolerant humidity, RH%;
284 * Delay before setting the error, second;
285 * Delay before clearing the error, second;
286 * Lock – lock the error until the device is reset.
287
288 As a result of the operation of the battery protection from water, the "Water" error is generated.
289
290 Error generation conditions:
291
292 * the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
293
294 Conditions for removing the error:
295
296 * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
297
298 (% class="box infomessage" %)
299 (((
300 If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
301 )))
302
303 === Logic high temperature ===
304
305 To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
306
307 [[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
308
309 In this section:
310
311 * Enable – a flag to enable the protection;
312 * Maximum temperature, °C;
313 * Tolerant temperature, °C;
314 * Delay before setting the error, second;
315 * Delay before clearing the error, second;
316 * Lock – lock the error until the device is reset.
317
318 As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
319
320 Error generation conditions:
321
322 * a BMS Logic device temperature is higher than the “Maximum temperature” value.
323
324 Conditions for removing the error:
325
326 * a BMS Logic device temperature is less than the “Tolerant temperature” value.
327
328 (% class="box infomessage" %)
329 (((
330 Cell balancing is disabled on Logic devices with high temperature.
331 )))
332
333 === Logic offline ===
334
335 To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
336
337 [[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
338
339 In this section:
340
341 * Enable – a flag to enable the protection;
342 * Lock – lock the error until the device is reset.
343
344 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
345
346 Error generation conditions:
347
348 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
349
350 Conditions for removing the error:
351
352 * all connected BMS Logic devices respond to the commands of the BMS Main device.
353
354 (% class="box warningmessage" %)
355 (((
356 If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
357 )))
358
359 === Cell count ===
360
361 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
362
363 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
364
365 In this section:
366
367 * Enable – a flag to enable the protection;
368 * Number of cells – a number of cells connected to the BMS;
369 * Delay before setting the error, millisecond;
370 * Delay before clearing the error, second;
371 * Lock – a flag to block the error until the device is restarted.
372
373 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
374
375 Error generation conditions:
376
377 * 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.
378
379 Conditions for removing the error:
380
381 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
382
383 (% class="box warningmessage" %)
384 (((
385 If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
386 )))
387
388 === Logic count ===
389
390 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:
391
392 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
393
394 In this section:
395
396 * Enable – a flag to enable the protection;
397 * Logic count – a number of BMS Logic devices connected to the BMS Main;
398 * 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);
399 * Lock – lock the error until the device is reset.
400
401 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.
402
403 Error generation conditions:
404
405 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
406
407 Conditions for removing the error:
408
409 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
410
411 (% class="box warningmessage" %)
412 (((
413 If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
414 )))
415
416 === Short circuit ===
417
418 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.
419
420 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
421
422 [[image:1735224667621-969.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
423
424 In this section:
425
426 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
427 ** Enable – a flag to enable the protection;
428 ** Maximum current, A;
429 ** Delay before setting the error, second;
430 * Delay before clearing the error, second;
431 * Lock – a flag to block the error until the device is restarted.
432
433 If there is a short circuit, the "Short circuit" error is generated.
434
435 Error generation conditions:
436
437 * 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.
438
439 Conditions for removing the error:
440
441 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
442
443 (% class="box infomessage" %)
444 (((
445 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).
446 )))
447
448 === High contactor temperature ===
449
450 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.
451
452 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
453
454 [[image:1735224706573-347.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
455
456 In this section:
457
458 * Enable – a flag to enable the protection;
459 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
460 * Maximum contactor temperature, °C;
461 * Tolerant contactor temperature, °C;
462 * Delay before setting the error, second;
463 * Delay before clearing the error, second;
464 * Lock – a flag to block the error until the device is restarted.
465
466 If there is a contactor overheat, the "High contactor temperature" error is generated.
467
468 Error generation conditions:
469
470 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
471
472 Conditions for removing the error:
473
474 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
475
476 (% class="box infomessage" %)
477 (((
478 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).
479 )))
480
481 === Current sensor ===
482
483 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.
484
485 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
486
487 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
488
489 In this section:
490
491 * Enable – a flag to enable the protection;
492 * Maximum voltage, V;
493 * Minimum voltage, V;
494 * Voltage hysteresis – a hysteresis value to clear the error, V;
495 * Delay before setting the error, second;
496 * Delay before clearing the error, second;
497 * Lock – a flag to block the error until the device is restarted.
498
499 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
500
501 Error generation conditions:
502
503 * 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;
504 * 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.
505
506 Conditions for removing the error:
507
508 * 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.
509
510 (% class="box warningmessage" %)
511 (((
512 If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
513 )))
514
515 === Power switch ===
516
517 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:
518
519 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
520
521 In this section:
522
523 * Delay before clearing the error, second;
524 * Lock – a flag to block the error until the device is restarted.
525
526 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.
527
528 (% class="box warningmessage" %)
529 (((
530 If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
531 )))
532
533 === Power fault ===
534
535 TBA
536
537 === Charge contactor cycles ===
538
539 The BMS Main 3 device protects the charging contactor against frequent switching.
540
541 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
542
543 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
544
545 In this section:
546
547 * Enable – a flag to enable the protection;
548 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
549 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
550 * Delay before setting the error, millisecond;
551 * Delay before clearing the error, second;
552 * Lock – a flag to block the error until the device is restarted.
553
554 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
555
556 Error generation conditions:
557
558 * 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.
559
560 Conditions for removing the error:
561
562 * the “Delay before clearing the error” time has passed since the error was generated.
563
564 (% class="box infomessage" %)
565 (((
566 If there is the "CH contactor cycles error" error, the **charging **contactor opens.
567 )))
568
569 === Discharge contactor cycles ===
570
571 The BMS Main 3 device protects the discharging contactor against frequent switching.
572
573 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
574
575 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
576
577 In this section:
578
579 * Enable – a flag to enable the protection;
580 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
581 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
582 * Delay before setting the error, millisecond;
583 * Delay before clearing the error, second;
584 * Lock – a flag to block the error until the device is restarted.
585
586 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
587
588 Error generation conditions:
589
590 * 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.
591
592 Conditions for removing the error:
593
594 * the “Delay before clearing the error” time has passed since the error was generated.
595
596 (% class="box infomessage" %)
597 (((
598 If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
599 )))
600
601 === Temperature sensors ===
602
603 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
604
605 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
606
607 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
608
609 In this section:
610
611 * Enable – a flag to enable the protection;
612 * Delay before setting the error, millisecond;
613 * Delay before clearing the error, second;
614 * Lock – a flag to block the error until the device is restarted.
615
616 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.
617
618 (% class="box warningmessage" %)
619 (((
620 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
621 )))
622
623 === WDT reset ===
624
625 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.
626
627 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
628
629 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
630
631 In this section:
632
633 * Enable – a flag to enable the protection;
634 * Delay before clearing the error, second;
635 * Lock – a flag to block the error until the device is restarted.
636
637 Conditions for removing the error:
638
639 * the “Delay before clearing the error” time has passed from the device startup.
640
641 (% class="box warningmessage" %)
642 (((
643 If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
644 )))
645
646 === Unallowable charging ===
647
648 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
649
650 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
651
652 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
653
654 In this section:
655
656 * Enable – a flag to enable the protection;
657 * Delay before setting the error, second;
658 * Delay before clearing the error, second;
659 * Lock – a flag to block the error until the device is restarted.
660
661 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
662
663 Error generation conditions:
664
665 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
666
667 Conditions for removing the error:
668
669 * the battery current is zero during the “Delay before clearing the error” time.
670
671 (% class="box infomessage" %)
672 (((
673 If there is the "Unallowable charging" error, the **discharging **contactor opens.
674 )))
675
676 === Stuck contactor ===
677
678 The BMS Main 3 device protects contactors against sticking.
679
680 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
681
682 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
683
684 In this section:
685
686 * Enable – a flag to enable the protection;
687 * Delay before setting the error, millisecond;
688 * Delay before clearing the error, second;
689 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
690 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
691 * Lock – a flag to block the error until the device is restarted.
692
693 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
694
695 * 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”.
696
697 (% class="box warningmessage" %)
698 (((
699 If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
700 )))
701
702 === Contactor feedback ===
703
704 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.
705
706 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
707
708 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
709
710 In this section:
711
712 * Enable – a flag to enable the protection;
713 * Delay before setting the error, millisecond;
714 * Delay before clearing the error, second;
715 * Lock – a flag to block the error until the device is restarted.
716
717 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
718
719 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
720
721 (% class="box warningmessage" %)
722 (((
723 If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
724 )))
725
726 === Insulation ===
727
728 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.
729
730 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
731
732 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
733
734 In this section:
735
736 * Enable – a flag to enable the protection;
737 * Checking algorithm – isolation checking mode:
738 ** Always on – check is always performed;
739 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
740 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
741 * Delay before setting the error, second;
742 * Delay before clearing the error, second;
743 * Lock – a flag to block the error until the device is restarted.
744
745 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.
746
747 (% class="box warningmessage" %)
748 (((
749 If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
750 )))
751
752 === HVIL ===
753
754 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.
755
756 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
757
758 [[image:1735224839441-185.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
759
760 In this section:
761
762 * Enable – a flag to enable the protection;
763 * Source is OFF: Lower current limit, A;
764 * Source is OFF: Upper current limit, A;
765 * Source is ON: Lower current limit, A;
766 * Source is ON: Upper current limit, A;
767 * Lock – a flag to block the error until the device is restarted.
768
769 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.
770
771 (% class="box warningmessage" %)
772 (((
773 If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
774 )))
775
776 === Critical error ===
777
778 To change the critical error parameters, select the "Protections → Critical error" section:
779
780 [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
781
782 In this section:
783
784 * Enable – a flag to enable the protection;
785 * Delay before setting the error, millisecond;
786 * Delay before clearing the error, second;
787 * Lock – a flag to block the error until the device is restarted.
788
789 The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
790
791 * “Battery cover error”;
792 * “Water”;
793 * “Logic offline”;
794 * “Cell count error”;
795 * “ADC error”;
796 * “Current sensor error”;
797 * “Shunt offline”;
798 * “Shunt error”;
799 * “WDT reset”
800 * “No temp. sensors”;
801 * “Temperature sensor shorted”;
802 * “Stuck contactor”;
803 * “CH contactor feedback error”;
804 * “DCH contactor feedback error”;
805 * “Insulation fault”;
806 * “PCH contactor feedback error”;
807 * “CH/DCH contactor feedback error”;
808 * “Main contactor feedback error”;
809 * “High voltage fault”;
810 * “Power switch error”;
811 * “HVIL error”l
812 * “Power fault”.
813
814 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
815
816 (% class="box infomessage" %)
817 (((
818 If there is the “Critical error”, **all **contactors open.
819 )))
820
821 === General error ===
822
823 To change the general error parameters, select the "Protections → Critical error" section:
824
825 [[image:1735224942262-497.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
826
827 In this section:
828
829 * Enable – a flag to enable the protection;
830 * Delay before setting the error, millisecond;
831 * Delay before clearing the error, second;
832 * Lock – a flag to block the error until the device is restarted;
833 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
834
835 The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
836
837 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
838
839 (% class="box infomessage" %)
840 (((
841 The state of the “General error” can be output to a discrete output or a power switch.
842 )))