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Wiki source code of 3.4 Protections

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1 (% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 = Configuration =
3
4 (% data-numbered-headings-start="4" style="--numbered-headings-start: 3;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 == Protections ==
6
7 The BMS Main 3 device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
8
9 (% class="box errormessage" %)
10 (((
11 **Attention!**
12 Behavior of contactors at different errors is configured in **corresponding contactor settings**!
13 )))
14
15 === Overcurrent ===
16
17 The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
18
19 To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
20
21 [[image:1735224601506-488.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
22
23 In this section:
24
25 * Enable – a flag to enable the protection;
26 * Maximum charging current, А;
27 * Tolerant charging current, А;
28 * Maximum discharging current, А;
29 * Tolerant discharging current, А;
30 * Delay before setting the error, millisecond;
31 * Delay before clearing the error, second;
32 * Lock – a flag to block the error until the device is restarted.
33
34 As a result of operation of the overcurrent protection, the "Overcurrent" error is generated.
35
36 Error generation conditions:
37
38 * the current is positive (charging), and its modulo value is greater than the “Maximum charging current” value for the “Delay before setting the error” time;
39 * the current is negative (discharging), and its modulo value is greater than the “Maximum discharging current” value for the “Delay before setting the error” time.
40
41 Conditions for removing the error:
42
43 * the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
44 * the current is negative (discharging) or zero, and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
45
46 === Charge current limit ===
47
48 The BMS Main 3 device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
49
50 Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
51
52 To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
53
54 [[image:1735225207687-430.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
55
56 * Enable – a flag to enable the protection;
57 * Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
58 * Region 1: Current difference – a value of maximum absolute current difference, A;
59 * Region 2: Current difference – a value of maximum relative current excess, A;
60 * Delay before setting the error, millisecond;
61 * Delay before clearing the error, second;
62 * Lock – a flag to block the error until the device is restarted.
63
64 === Discharge current limit ===
65
66 The BMS Main 3 device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
67
68 Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
69
70 To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
71
72 [[image:1735225942893-869.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
73
74 In this section:
75
76 * Enable – a flag to enable the protection;
77 * Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
78 * Region 1: Current difference – a value of maximum absolute current difference, A;
79 * Region 2: Current difference – a value of maximum relative current excess, A;
80 * Delay before setting the error, millisecond;
81 * Delay before clearing the error, second;
82 * Lock – a flag to block the error until the device is restarted.
83
84 === Undervoltage ===
85
86 The BMS Main 3 device implements battery protection from too low voltage on the cells.
87
88 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
89
90 [[image:1735224224155-829.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
91
92 In this section:
93
94 * Enable – a flag to enable the protection;
95 * Minimum cell voltage, V;
96 * Tolerant cell voltage, V;
97 * Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage;
98 * Delay before setting the error, millisecond;
99 * Delay before clearing the error, second;
100 * Lock – a flag to block the error until the device is restarted.
101
102 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
103
104 Error generation conditions:
105
106 * the minimum voltage among all cells of the battery is less than the “Minimum cell voltage” value for the “Delay before setting the error” time.
107
108 Conditions for removing the error:
109
110 * the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
111
112 === Overvoltage ===
113
114 The BMS Main 3 device implements battery protection from too high voltage on the cells.
115
116 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
117
118 [[image:1735224377252-473.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
119
120 In this section:
121
122 * Enable – a flag to enable the protection;
123 * Maximum cell voltage, V;
124 * Tolerant cell voltage, V;
125 * Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage;
126 * Delay before setting the error, millisecond;
127 * Delay before clearing the error, second;
128 * Lock – a flag to block the error until the device is restarted.
129
130 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
131
132 Error generation conditions:
133
134 * the maximum voltage among all cells of the battery is greater than the “Maximum cell voltage” value for the “Delay before setting the error” time.
135
136 Conditions for removing the error:
137
138 * the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
139
140 === Low temperature ===
141
142 The BMS Main 3 device implements battery protection from too low temperature.
143
144 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
145
146 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
147
148 In this section:
149
150 * Enable – a flag to enable the protection;
151 * Minimum charge temperature, °C;
152 * Tolerant charge temperature, °C;
153 * Minimum discharge temperature, °C;
154 * Tolerant discharge temperature, °C;
155 * Delay before setting the error, millisecond;
156 * Delay before clearing the error, second;
157 * Lock – a flag to block the error until the device is restarted.
158
159 As a result of the operation of the battery protection from low temperature, the "Low temperature (CH)" and/or “Low temperature (DCH)” error are generated.
160
161 Error generation conditions:
162
163 * the minimum temperature among all cells of the battery is less than the “Minimum charging (discharging) temperature” value for the “Delay before setting the error” time.
164
165 Conditions for removing the error:
166
167 * the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
168
169 === High temperature ===
170
171 The BMS Main 3 device implements battery protection from too high temperature.
172
173 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
174
175 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
176
177 In this section:
178
179 * Enable – a flag to enable the protection;
180 * Maximum charge temperature, °C;
181 * Tolerant charge temperature, °C;
182 * Maximum discharge temperature, °C;
183 * Tolerant discharge temperature, °C;
184 * Delay before setting the error, millisecond;
185 * Delay before clearing the error, second;
186 * Lock – a flag to block the error until the device is restarted.
187
188 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
189
190 Error generation conditions:
191
192 * the maximum temperature among all cells of the battery is greater than the “Maximum charging (discharging) temperature” value for the “Delay before setting the error” time.
193
194 Conditions for removing the error:
195
196 * the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
197
198 === Battery cover ===
199
200 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
201
202 [[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
203
204 In this section:
205
206 * Enable – a flag to enable the protection;
207 * Delay before setting the error, millisecond;
208 * Delay before clearing the error, second;
209 * Lock – a flag to block the error until the device is restarted.
210
211 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
212
213 Error generation conditions:
214
215 * there is a signal from the battery cover during the “Delay before setting the error” time.
216
217 Conditions for removing the error:
218
219 * no signal from the battery cover during the “Delay before clearing the error” time.
220
221 (% class="box warningmessage" %)
222 (((
223 If there is the "Battery cover error", the **“Critical error” **is generated**.**
224 )))
225
226 === High humidity ===
227
228 The BMS Main 3 can detect that the battery is operating in high humidity conditions.
229
230 To change the detection parameters, select the "Protections → High humidity" section:
231
232 [[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
233
234 In this section:
235
236 * Enable – a flag to enable the detection;
237 * Maximum humidity, RH%;
238 * Tolerant humidity, RH%;
239 * Delay before setting the error, second;
240 * Delay before clearing the error, second;
241 * Lock the error until the device is reset.
242
243 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
244
245 Error generation conditions:
246
247 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
248
249 Conditions for removing the error:
250
251 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
252
253 (% class="box infomessage" %)
254 (((
255 If there is the "High humidity" error, no action is taken. The error is indicative.
256 )))
257
258 === Water ===
259
260 The BMS Main 3 can protect the battery from working in very high humidity conditions.
261
262 To change the protection parameters, select the "Protections → Water" section:
263
264 [[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
265
266 In this section:
267
268 * Enable – a flag to enable the protection;
269 * Maximum humidity, RH%;
270 * Tolerant humidity, RH%;
271 * Delay before setting the error, second;
272 * Delay before clearing the error, second;
273 * Lock – lock the error until the device is reset.
274
275 As a result of the operation of the battery protection from water, the "Water" error is generated.
276
277 Error generation conditions:
278
279 * the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
280
281 Conditions for removing the error:
282
283 * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
284
285 (% class="box warningmessage" %)
286 (((
287 If there is the “Water” error, the **“Critical error”** is generated.
288 )))
289
290 === Logic high temperature ===
291
292 To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
293
294 [[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
295
296 In this section:
297
298 * Enable – a flag to enable the protection;
299 * Maximum temperature, °C;
300 * Tolerant temperature, °C;
301 * Delay before setting the error, second;
302 * Delay before clearing the error, second;
303 * Lock – lock the error until the device is reset.
304
305 As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
306
307 Error generation conditions:
308
309 * a BMS Logic device temperature is higher than the “Maximum temperature” value.
310
311 Conditions for removing the error:
312
313 * a BMS Logic device temperature is less than the “Tolerant temperature” value.
314
315 (% class="box infomessage" %)
316 (((
317 Cell balancing is disabled on Logic devices with high temperature.
318 )))
319
320 === Logic offline ===
321
322 To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
323
324 [[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
325
326 In this section:
327
328 * Enable – a flag to enable the protection;
329 * Lock – lock the error until the device is reset.
330
331 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
332
333 Error generation conditions:
334
335 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
336
337 Conditions for removing the error:
338
339 * all connected BMS Logic devices respond to the commands of the BMS Main device.
340
341 (% class="box warningmessage" %)
342 (((
343 If there is the "Logic offline" error, the **“Critical error” **is generated**.**
344 )))
345
346 === Cell count ===
347
348 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
349
350 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
351
352 In this section:
353
354 * Enable – a flag to enable the protection;
355 * Number of cells – a number of cells connected to the BMS;
356 * Delay before setting the error, millisecond;
357 * Delay before clearing the error, second;
358 * Lock – a flag to block the error until the device is restarted.
359
360 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
361
362 Error generation conditions:
363
364 * the number of cells connected to the BMS is **not equal** to the “Number of cells” value during the “Delay before setting the error” time.
365
366 Conditions for removing the error:
367
368 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
369
370 (% class="box warningmessage" %)
371 (((
372 If there is the "Cell count error", the **“Critical error” **is generated**.**
373 )))
374
375 === Logic count ===
376
377 To change the protection parameters from the mismatch of the number of BMS Logic devices to the set value, select the "Protections → Logic count” section:
378
379 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
380
381 In this section:
382
383 * Enable – a flag to enable the protection;
384 * Logic count – a number of BMS Logic devices connected to the BMS Main;
385 * Scan fast – a flag to scan BMS Logic devices fast (devices with addresses from 1 to “Logic count” are scanned; this mode reduces BMS system startup time);
386 * Lock – lock the error until the device is reset.
387
388 As a result of the operation of the protection from the mismatch of the number of BMS Logic devices, the "Logic count error" is generated.
389
390 Error generation conditions:
391
392 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
393
394 Conditions for removing the error:
395
396 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
397
398 (% class="box warningmessage" %)
399 (((
400 If there is the "Logic count error", the **“Critical error”** is generated.
401 )))
402
403 === Short circuit ===
404
405 The BMS Main 3 device implements the protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
406
407 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
408
409 [[image:1735224667621-969.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
410
411 In this section:
412
413 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
414 ** Enable – a flag to enable the protection;
415 ** Maximum current, A;
416 ** Delay before setting the error, second;
417 * Delay before clearing the error, second;
418 * Lock – a flag to block the error until the device is restarted.
419
420 If there is a short circuit, the "Short circuit" error is generated.
421
422 Error generation conditions:
423
424 * at any of the three protection levels, the current modulo is greater than the “Maximum current” value during the “Delay before setting the error” time.
425
426 Conditions for removing the error:
427
428 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
429
430 === High contactor temperature ===
431
432 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.
433
434 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
435
436 [[image:1735224706573-347.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
437
438 In this section:
439
440 * Enable – a flag to enable the protection;
441 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
442 * Maximum contactor temperature, °C;
443 * Tolerant contactor temperature, °C;
444 * Delay before setting the error, second;
445 * Delay before clearing the error, second;
446 * Lock – a flag to block the error until the device is restarted.
447
448 If there is a contactor overheat, the "High contactor temperature" error is generated.
449
450 Error generation conditions:
451
452 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
453
454 Conditions for removing the error:
455
456 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
457
458 === Current sensor ===
459
460 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.
461
462 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
463
464 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
465
466 In this section:
467
468 * Enable – a flag to enable the protection;
469 * Maximum voltage, V;
470 * Minimum voltage, V;
471 * Voltage hysteresis – a hysteresis value to clear the error, V;
472 * Delay before setting the error, second;
473 * Delay before clearing the error, second;
474 * Lock – a flag to block the error until the device is restarted.
475
476 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
477
478 Error generation conditions:
479
480 * 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;
481 * 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.
482
483 Conditions for removing the error:
484
485 * 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.
486
487 (% class="box warningmessage" %)
488 (((
489 If there is the “Current sensor error”, the **“Critical error” **is generated.
490 )))
491
492 === Power switch ===
493
494 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:
495
496 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
497
498 In this section:
499
500 * Delay before clearing the error, second;
501 * Lock – a flag to block the error until the device is restarted.
502
503 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.
504
505 (% class="box warningmessage" %)
506 (((
507 If there is the "Power switch error", the **“Critical error” **is generated.
508 )))
509
510 === Power fault ===
511
512 BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
513
514 (% class="box infomessage" %)
515 (((
516 **Note:** this error can be configured only under** "Service" account**.
517 )))
518
519 To change the parameters of the power fault error, select the "Protections → Power fault" section:
520
521 [[image:1739284154410-676.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
522
523 In this section:
524
525 * Enable – a flag to enable the protection;
526 * Delay before setting the error, millisecond;
527 * Time to keep power off, millisecond;
528 * Delay before clearing the error, millisecond;
529 * Lock – a flag to block the error until the device is restarted.
530
531 The “Power fault” occurs when the device detects a shortage or high power consumption in power supplies mentioned above. After that BMS turns off the corresponding power supply for "Time to keep power off", then it tries to enable power again.
532
533 Error is removed when the power consumption is normal during “Delay before clearing the error” time.
534
535 (% class="box warningmessage" %)
536 (((
537 If there is the "Power fault", the **“Critical error” **is generated.
538 )))
539
540 === Charge contactor cycles ===
541
542 The BMS Main 3 device protects the charging contactor against frequent switching.
543
544 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
545
546 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
547
548 In this section:
549
550 * Enable – a flag to enable the protection;
551 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
552 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
553 * Delay before setting the error, millisecond;
554 * Delay before clearing the error, second;
555 * Lock – a flag to block the error until the device is restarted.
556
557 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
558
559 Error generation conditions:
560
561 * 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.
562
563 Conditions for removing the error:
564
565 * the “Delay before clearing the error” time has passed since the error was generated.
566
567 === Discharge contactor cycles ===
568
569 The BMS Main 3 device protects the discharging contactor against frequent switching.
570
571 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
572
573 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
574
575 In this section:
576
577 * Enable – a flag to enable the protection;
578 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
579 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
580 * Delay before setting the error, millisecond;
581 * Delay before clearing the error, second;
582 * Lock – a flag to block the error until the device is restarted.
583
584 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
585
586 Error generation conditions:
587
588 * 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.
589
590 Conditions for removing the error:
591
592 * the “Delay before clearing the error” time has passed since the error was generated.
593
594 === Temperature sensors ===
595
596 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
597
598 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
599
600 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
601
602 In this section:
603
604 * Enable – a flag to enable the protection;
605 * Delay before setting the error, millisecond;
606 * Delay before clearing the error, second;
607 * Lock – a flag to block the error until the device is restarted.
608
609 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.
610
611 (% class="box warningmessage" %)
612 (((
613 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated.
614 )))
615
616 === WDT reset ===
617
618 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.
619
620 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
621
622 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
623
624 In this section:
625
626 * Enable – a flag to enable the protection;
627 * Delay before clearing the error, second;
628 * Lock – a flag to block the error until the device is restarted.
629
630 Conditions for removing the error:
631
632 * the “Delay before clearing the error” time has passed from the device startup.
633
634 (% class="box warningmessage" %)
635 (((
636 If there is the "WDT reset" error, the **“Critical error” **is generated.
637 )))
638
639 === Unallowable charging ===
640
641 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
642
643 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
644
645 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
646
647 In this section:
648
649 * Enable – a flag to enable the protection;
650 * Delay before setting the error, second;
651 * Delay before clearing the error, second;
652 * Lock – a flag to block the error until the device is restarted.
653
654 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
655
656 Error generation conditions:
657
658 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
659
660 Conditions for removing the error:
661
662 * the battery current is zero during the “Delay before clearing the error” time.
663
664 === Stuck contactor ===
665
666 The BMS Main 3 device protects contactors against sticking.
667
668 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
669
670 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
671
672 In this section:
673
674 * Enable – a flag to enable the protection;
675 * Delay before setting the error, millisecond;
676 * Delay before clearing the error, second;
677 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
678 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
679 * Lock – a flag to block the error until the device is restarted.
680
681 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
682
683 * 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”.
684
685 (% class="box warningmessage" %)
686 (((
687 If there is the “Stuck contactor” error, the **“Critical error” **is generated.
688 )))
689
690 === Contactor feedback ===
691
692 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.
693
694 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
695
696 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
697
698 In this section:
699
700 * Enable – a flag to enable the protection;
701 * Delay before setting the error, millisecond;
702 * Delay before clearing the error, second;
703 * Lock – a flag to block the error until the device is restarted.
704
705 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
706
707 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
708
709 (% class="box warningmessage" %)
710 (((
711 If there is the “Contactor feedback” error, the **“Critical error” **is generated.
712 )))
713
714 === Insulation ===
715
716 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.
717
718 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
719
720 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
721
722 In this section:
723
724 * Enable – a flag to enable the protection;
725 * Checking algorithm – isolation checking mode:
726 ** Always on – check is always performed;
727 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
728 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
729 * Delay before setting the error, second;
730 * Delay before clearing the error, second;
731 * Lock – a flag to block the error until the device is restarted.
732
733 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.
734
735 (% class="box warningmessage" %)
736 (((
737 If there is the “Insulation fault”, the **“Critical error”** is generated.
738 )))
739
740 === HVIL ===
741
742 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.
743
744 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
745
746 [[image:1735224839441-185.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
747
748 In this section:
749
750 * Enable – a flag to enable the protection;
751 * Source is OFF: Lower current limit, A;
752 * Source is OFF: Upper current limit, A;
753 * Source is ON: Lower current limit, A;
754 * Source is ON: Upper current limit, A;
755 * Lock – a flag to block the error until the device is restarted.
756
757 If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated.
758
759 Error clears if interlock loop is being restored.
760
761 (% class="box warningmessage" %)
762 (((
763 If there is the “HVIL error”, the **“Critical error”** is generated.
764 )))
765
766 === Critical error ===
767
768 Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
769
770 To change the critical error parameters, select the "Protections → Critical error" section:
771
772 [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
773
774 In this section:
775
776 * Enable – a flag to enable the protection;
777 * Delay before setting the error, millisecond;
778 * Delay before clearing the error, second;
779 * Lock – a flag to block the error until the device is restarted.
780
781 The "Critical error" signal is generated if at least one of the critical errors (see [[Errors>>doc:Battery management systems.Additional information.1\. Battery controllers\: signals and errors.WebHome||anchor="HErrors"]]) is generated during the “Delay before setting the error” time.
782
783 The “Critical error" signal is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
784
785 === General error ===
786
787 To change the general error parameters, select the "Protections → Critical error" section:
788
789 [[image:1735224942262-497.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
790
791 In this section:
792
793 * Enable – a flag to enable the protection;
794 * Delay before setting the error, millisecond;
795 * Delay before clearing the error, second;
796 * Lock – a flag to block the error until the device is restarted;
797 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
798
799 The “General error”is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
800
801 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
802
803 (% class="box infomessage" %)
804 (((
805 The state of the “General error” can be assigned to a discrete output or to a power switch.
806 )))