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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"]].
48
49 Current
50
51 If current is more than calculated maximum, "Current limit" error is generated.
52
53
54 To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
55
56 [[image:1735225207687-430.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
57
58 * Enable – a flag to enable the protection;
59 * Threshold to switch from Region 1 to Region 2
60 *
61
62
63 === Discharge current limit ===
64
65 TBA
66
67 === Undervoltage ===
68
69 The BMS Main 3 device implements battery protection from too low voltage on the cells.
70
71 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
72
73 [[image:1735224224155-829.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
74
75 In this section:
76
77 * Enable – a flag to enable the protection;
78 * Minimum cell voltage, V;
79 * Tolerant cell voltage, V;
80 * 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;
81 * Delay before setting the error, millisecond;
82 * Delay before clearing the error, second;
83 * Lock – a flag to block the error until the device is restarted.
84
85 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
86
87 Error generation conditions:
88
89 * 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.
90
91 Conditions for removing the error:
92
93 * 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.
94
95 (% class="box infomessage" %)
96 (((
97 If there is the "Undervoltage" error, the **discharging **contactor opens.
98 )))
99
100 === Overvoltage ===
101
102 The BMS Main 3 device implements battery protection from too high voltage on the cells.
103
104 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
105
106 [[image:1735224377252-473.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
107
108 In this section:
109
110 * Enable – a flag to enable the protection;
111 * Maximum cell voltage, V;
112 * Tolerant cell voltage, V;
113 * 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;
114 * Delay before setting the error, millisecond;
115 * Delay before clearing the error, second;
116 * Lock – a flag to block the error until the device is restarted.
117
118 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
119
120 Error generation conditions:
121
122 * 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.
123
124 Conditions for removing the error:
125
126 * 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.
127
128 (% class="box infomessage" %)
129 (((
130 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).
131 )))
132
133 === Low temperature ===
134
135 The BMS Main 3 device implements battery protection from too low temperature.
136
137 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
138
139 [[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
140
141 In this section:
142
143 * Enable – a flag to enable the protection;
144 * Minimum charge temperature, °C;
145 * Tolerant charge temperature, °C;
146 * Minimum discharge temperature, °C;
147 * Tolerant discharge temperature, °C;
148 * Delay before setting the error, millisecond;
149 * Delay before clearing the error, second;
150 * Lock – a flag to block the error until the device is restarted.
151
152 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.
153
154 Error generation conditions:
155
156 * 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.
157
158 Conditions for removing the error:
159
160 * 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.
161
162 (% class="box infomessage" %)
163 (((
164 If there is the "Low temperature (CH)" error, the **charging **contactor opens.
165 If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
166 )))
167
168 === High temperature ===
169
170 The BMS Main 3 device implements battery protection from too high temperature.
171
172 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
173
174 [[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
175
176 In this section:
177
178 * Enable – a flag to enable the protection;
179 * Maximum charge temperature, °C;
180 * Tolerant charge temperature, °C;
181 * Maximum discharge temperature, °C;
182 * Tolerant discharge temperature, °C;
183 * Delay before setting the error, millisecond;
184 * Delay before clearing the error, second;
185 * Lock – a flag to block the error until the device is restarted.
186
187 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
188
189 Error generation conditions:
190
191 * 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.
192
193 Conditions for removing the error:
194
195 * 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.
196
197 (% class="box infomessage" %)
198 (((
199 If there is the "High temperature (CH)" error, the **charging **contactor opens.
200 If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
201 )))
202
203 === Battery cover ===
204
205 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
206
207 [[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
208
209 In this section:
210
211 * Enable – a flag to enable the protection;
212 * Delay before setting the error, millisecond;
213 * Delay before clearing the error, second;
214 * Lock – a flag to block the error until the device is restarted.
215
216 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
217
218 Error generation conditions:
219
220 * there is a signal from the battery cover during the “Delay before setting the error” time.
221
222 Conditions for removing the error:
223
224 * no signal from the battery cover during the “Delay before clearing the error” time.
225
226 (% class="box warningmessage" %)
227 (((
228 If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
229 )))
230
231 === High humidity ===
232
233 The BMS Main 3 can detect that the battery is operating in high humidity conditions.
234
235 To change the detection parameters, select the "Protections → High humidity" section:
236
237 [[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
238
239 In this section:
240
241 * Enable – a flag to enable the detection;
242 * Maximum humidity, RH%;
243 * Tolerant humidity, RH%;
244 * Delay before setting the error, second;
245 * Delay before clearing the error, second;
246 * Lock the error until the device is reset.
247
248 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
249
250 Error generation conditions:
251
252 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
253
254 Conditions for removing the error:
255
256 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
257
258 (% class="box infomessage" %)
259 (((
260 If there is the "High humidity" error, no action is taken. The error is indicative.
261 )))
262
263 === Water ===
264
265 The BMS Main 3 can protect the battery from working in very high humidity conditions.
266
267 To change the protection parameters, select the "Protections → Water" section:
268
269 [[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
270
271 In this section:
272
273 * Enable – a flag to enable the protection;
274 * Maximum humidity, RH%;
275 * Tolerant humidity, RH%;
276 * Delay before setting the error, second;
277 * Delay before clearing the error, second;
278 * Lock – lock the error until the device is reset.
279
280 As a result of the operation of the battery protection from water, the "Water" error is generated.
281
282 Error generation conditions:
283
284 * the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
285
286 Conditions for removing the error:
287
288 * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
289
290 (% class="box infomessage" %)
291 (((
292 If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
293 )))
294
295 === Logic high temperature ===
296
297 To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
298
299 [[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
300
301 In this section:
302
303 * Enable – a flag to enable the protection;
304 * Maximum temperature, °C;
305 * Tolerant temperature, °C;
306 * Delay before setting the error, second;
307 * Delay before clearing the error, second;
308 * Lock – lock the error until the device is reset.
309
310 As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
311
312 Error generation conditions:
313
314 * a BMS Logic device temperature is higher than the “Maximum temperature” value.
315
316 Conditions for removing the error:
317
318 * a BMS Logic device temperature is less than the “Tolerant temperature” value.
319
320 (% class="box infomessage" %)
321 (((
322 Cell balancing is disabled on Logic devices with high temperature.
323 )))
324
325 === Logic offline ===
326
327 To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
328
329 [[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
330
331 In this section:
332
333 * Enable – a flag to enable the protection;
334 * Lock – lock the error until the device is reset.
335
336 As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
337
338 Error generation conditions:
339
340 * at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
341
342 Conditions for removing the error:
343
344 * all connected BMS Logic devices respond to the commands of the BMS Main device.
345
346 (% class="box warningmessage" %)
347 (((
348 If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
349 )))
350
351 === Cell count ===
352
353 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
354
355 [[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
356
357 In this section:
358
359 * Enable – a flag to enable the protection;
360 * Number of cells – a number of cells connected to the BMS;
361 * Delay before setting the error, millisecond;
362 * Delay before clearing the error, second;
363 * Lock – a flag to block the error until the device is restarted.
364
365 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
366
367 Error generation conditions:
368
369 * 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.
370
371 Conditions for removing the error:
372
373 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
374
375 (% class="box warningmessage" %)
376 (((
377 If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
378 )))
379
380 === Logic count ===
381
382 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:
383
384 [[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
385
386 In this section:
387
388 * Enable – a flag to enable the protection;
389 * Logic count – a number of BMS Logic devices connected to the BMS Main;
390 * 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);
391 * Lock – lock the error until the device is reset.
392
393 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.
394
395 Error generation conditions:
396
397 * the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
398
399 Conditions for removing the error:
400
401 * the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
402
403 (% class="box warningmessage" %)
404 (((
405 If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
406 )))
407
408 === Short circuit ===
409
410 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.
411
412 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
413
414 [[image:1735224667621-969.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
415
416 In this section:
417
418 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
419 ** Enable – a flag to enable the protection;
420 ** Maximum current, A;
421 ** Delay before setting the error, second;
422 * Delay before clearing the error, second;
423 * Lock – a flag to block the error until the device is restarted.
424
425 If there is a short circuit, the "Short circuit" error is generated.
426
427 Error generation conditions:
428
429 * 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.
430
431 Conditions for removing the error:
432
433 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
434
435 (% class="box infomessage" %)
436 (((
437 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).
438 )))
439
440 === High contactor temperature ===
441
442 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.
443
444 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
445
446 [[image:1735224706573-347.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
447
448 In this section:
449
450 * Enable – a flag to enable the protection;
451 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
452 * Maximum contactor temperature, °C;
453 * Tolerant contactor temperature, °C;
454 * Delay before setting the error, second;
455 * Delay before clearing the error, second;
456 * Lock – a flag to block the error until the device is restarted.
457
458 If there is a contactor overheat, the "High contactor temperature" error is generated.
459
460 Error generation conditions:
461
462 * the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
463
464 Conditions for removing the error:
465
466 * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
467
468 (% class="box infomessage" %)
469 (((
470 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).
471 )))
472
473 === Current sensor ===
474
475 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.
476
477 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
478
479 [[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
480
481 In this section:
482
483 * Enable – a flag to enable the protection;
484 * Maximum voltage, V;
485 * Minimum voltage, V;
486 * Voltage hysteresis – a hysteresis value to clear the error, V;
487 * Delay before setting the error, second;
488 * Delay before clearing the error, second;
489 * Lock – a flag to block the error until the device is restarted.
490
491 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
492
493 Error generation conditions:
494
495 * 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;
496 * 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.
497
498 Conditions for removing the error:
499
500 * 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.
501
502 (% class="box warningmessage" %)
503 (((
504 If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
505 )))
506
507 === Power switch ===
508
509 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:
510
511 [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
512
513 In this section:
514
515 * Delay before clearing the error, second;
516 * Lock – a flag to block the error until the device is restarted.
517
518 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.
519
520 (% class="box warningmessage" %)
521 (((
522 If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
523 )))
524
525 === Power fault ===
526
527 TBA
528
529 === Charge contactor cycles ===
530
531 The BMS Main 3 device protects the charging contactor against frequent switching.
532
533 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
534
535 [[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
536
537 In this section:
538
539 * Enable – a flag to enable the protection;
540 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
541 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
542 * Delay before setting the error, millisecond;
543 * Delay before clearing the error, second;
544 * Lock – a flag to block the error until the device is restarted.
545
546 If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
547
548 Error generation conditions:
549
550 * 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.
551
552 Conditions for removing the error:
553
554 * the “Delay before clearing the error” time has passed since the error was generated.
555
556 (% class="box infomessage" %)
557 (((
558 If there is the "CH contactor cycles error" error, the **charging **contactor opens.
559 )))
560
561 === Discharge contactor cycles ===
562
563 The BMS Main 3 device protects the discharging contactor against frequent switching.
564
565 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
566
567 [[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
568
569 In this section:
570
571 * Enable – a flag to enable the protection;
572 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
573 * Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
574 * Delay before setting the error, millisecond;
575 * Delay before clearing the error, second;
576 * Lock – a flag to block the error until the device is restarted.
577
578 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
579
580 Error generation conditions:
581
582 * 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.
583
584 Conditions for removing the error:
585
586 * the “Delay before clearing the error” time has passed since the error was generated.
587
588 (% class="box infomessage" %)
589 (((
590 If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
591 )))
592
593 === Temperature sensors ===
594
595 The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
596
597 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
598
599 [[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
600
601 In this section:
602
603 * Enable – a flag to enable the protection;
604 * Delay before setting the error, millisecond;
605 * Delay before clearing the error, second;
606 * Lock – a flag to block the error until the device is restarted.
607
608 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.
609
610 (% class="box warningmessage" %)
611 (((
612 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
613 )))
614
615 === WDT reset ===
616
617 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.
618
619 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
620
621 [[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
622
623 In this section:
624
625 * Enable – a flag to enable the protection;
626 * Delay before clearing the error, second;
627 * Lock – a flag to block the error until the device is restarted.
628
629 Conditions for removing the error:
630
631 * the “Delay before clearing the error” time has passed from the device startup.
632
633 (% class="box warningmessage" %)
634 (((
635 If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
636 )))
637
638 === Unallowable charging ===
639
640 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
641
642 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
643
644 [[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
645
646 In this section:
647
648 * Enable – a flag to enable the protection;
649 * Delay before setting the error, second;
650 * Delay before clearing the error, second;
651 * Lock – a flag to block the error until the device is restarted.
652
653 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
654
655 Error generation conditions:
656
657 * the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
658
659 Conditions for removing the error:
660
661 * the battery current is zero during the “Delay before clearing the error” time.
662
663 (% class="box infomessage" %)
664 (((
665 If there is the "Unallowable charging" error, the **discharging **contactor opens.
666 )))
667
668 === Stuck contactor ===
669
670 The BMS Main 3 device protects contactors against sticking.
671
672 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
673
674 [[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
675
676 In this section:
677
678 * Enable – a flag to enable the protection;
679 * Delay before setting the error, millisecond;
680 * Delay before clearing the error, second;
681 * Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
682 * Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
683 * Lock – a flag to block the error until the device is restarted.
684
685 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
686
687 * 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”.
688
689 (% class="box warningmessage" %)
690 (((
691 If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
692 )))
693
694 === Contactor feedback ===
695
696 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.
697
698 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
699
700 [[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
701
702 In this section:
703
704 * Enable – a flag to enable the protection;
705 * Delay before setting the error, millisecond;
706 * Delay before clearing the error, second;
707 * Lock – a flag to block the error until the device is restarted.
708
709 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
710
711 * a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
712
713 (% class="box warningmessage" %)
714 (((
715 If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
716 )))
717
718 === Insulation ===
719
720 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.
721
722 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
723
724 [[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
725
726 In this section:
727
728 * Enable – a flag to enable the protection;
729 * Checking algorithm – isolation checking mode:
730 ** Always on – check is always performed;
731 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
732 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
733 * Delay before setting the error, second;
734 * Delay before clearing the error, second;
735 * Lock – a flag to block the error until the device is restarted.
736
737 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.
738
739 (% class="box warningmessage" %)
740 (((
741 If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
742 )))
743
744 === HVIL ===
745
746 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.
747
748 To change the HVIL measurement parameters, select the "Protections → HVIL" section:
749
750 [[image:1735224839441-185.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
751
752 In this section:
753
754 * Enable – a flag to enable the protection;
755 * Source is OFF: Lower current limit, A;
756 * Source is OFF: Upper current limit, A;
757 * Source is ON: Lower current limit, A;
758 * Source is ON: Upper current limit, A;
759 * Lock – a flag to block the error until the device is restarted.
760
761 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.
762
763 (% class="box warningmessage" %)
764 (((
765 If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
766 )))
767
768 === Critical error ===
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 flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
782
783 * “Battery cover error”;
784 * “Water”;
785 * “Logic offline”;
786 * “Cell count error”;
787 * “ADC error”;
788 * “Current sensor error”;
789 * “Shunt offline”;
790 * “Shunt error”;
791 * “WDT reset”
792 * “No temp. sensors”;
793 * “Temperature sensor shorted”;
794 * “Stuck contactor”;
795 * “CH contactor feedback error”;
796 * “DCH contactor feedback error”;
797 * “Insulation fault”;
798 * “PCH contactor feedback error”;
799 * “CH/DCH contactor feedback error”;
800 * “Main contactor feedback error”;
801 * “High voltage fault”;
802 * “Power switch error”;
803 * “HVIL error”l
804 * “Power fault”.
805
806 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
807
808 (% class="box infomessage" %)
809 (((
810 If there is the “Critical error”, **all **contactors open.
811 )))
812
813 === General error ===
814
815 To change the general error parameters, select the "Protections → Critical error" section:
816
817 [[image:1735224942262-497.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
818
819 In this section:
820
821 * Enable – a flag to enable the protection;
822 * Delay before setting the error, millisecond;
823 * Delay before clearing the error, second;
824 * Lock – a flag to block the error until the device is restarted;
825 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
826
827 The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
828
829 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
830
831 (% class="box infomessage" %)
832 (((
833 The state of the “General error” can be output to a discrete output or a power switch.
834 )))