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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 = Settings =
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 Mini 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 Mini 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:1733748033234-868.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" 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), 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 Mini device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Mini S.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:1740571132019-848.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
55
56 In this section:
57
58 * Enable – a flag to enable the protection;
59 * 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;
60 * Region 1: Current difference – a value of maximum absolute current difference, A;
61 * Region 2: Current difference – a value of maximum relative current excess, A;
62 * Delay before setting the error, millisecond;
63 * Delay before clearing the error, second;
64 * Lock – a flag to block the error until the device is restarted.
65
66 === Discharge current limit ===
67
68 The BMS Mini device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Mini S.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
69
70 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.
71
72 To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
73
74 [[image:1740571296344-411.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="151" width="800"]]
75
76 In this section:
77
78 * Enable – a flag to enable the protection;
79 * 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;
80 * Region 1: Current difference – a value of maximum absolute current difference, A;
81 * Region 2: Current difference – a value of maximum relative current excess, A;
82 * Delay before setting the error, millisecond;
83 * Delay before clearing the error, second;
84 * Lock – a flag to block the error until the device is restarted.
85
86 === Undervoltage ===
87
88 The BMS Mini device implements battery protection from too low voltage on the cells.
89
90 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
91
92 [[image:1740571345293-460.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
93
94 In this section:
95
96 * Enable – a flag to enable the protection;
97 * Minimum cell voltage, V;
98 * Tolerant cell voltage, V;
99 * 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 instead of measured value;
100 * Delay before setting the error, millisecond;
101 * Delay before clearing the error, second;
102 * Lock – a flag to block the error until the device is restarted.
103
104 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
105
106 Error generation conditions:
107
108 * 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.
109
110 Conditions for removing the error:
111
112 * 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.
113
114 === Overvoltage ===
115
116 The BMS Mini device implements battery protection from too high voltage on the cells.
117
118 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
119
120 [[image:1740571383842-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="147" width="800"]]
121
122 In this section:
123
124 * Enable – a flag to enable the protection;
125 * Maximum cell voltage, V;
126 * Tolerant cell voltage, V;
127 * 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 instead of measured value;
128 * Delay before setting the error, millisecond;
129 * Delay before clearing the error, second;
130 * Lock – a flag to block the error until the device is restarted.
131
132 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
133
134 Error generation conditions:
135
136 * 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.
137
138 Conditions for removing the error:
139
140 * 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.
141
142 === Cell imbalance ===
143
144 The BMS Mini S device implements battery protection from too much cell imbalance. If balancing algorithm is not enough to compensate battery imbalance, then imbalance protection generates an error when imbalance is above estimated threshold.
145
146 To change the battery protection parameters from cell imbalance, select the "Protections → Cell imbalance" section:
147
148 [[image:1762772978976-565.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="145" width="800"]]
149
150 In this section:
151
152 * Enable – a flag to enable the protection;
153 * Maximum cell imbalance, V;
154 * Tolerant cell imbalance, V;
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 cell imbalance, the "Cell imbalance” error is generated.
160
161 Error generation conditions:
162
163 * the voltage difference between the most charged cell and the least charged cell is more than the “Maximum cell imbalance” value for the “Delay before setting the error” time.
164
165 Conditions for removing the error:
166
167 * the voltage difference between the most charged cell and the least charged cell is less than the “Tolerant cell imbalance” value for the “Delay before clearing the error” time.
168
169 === Low temperature ===
170
171 The BMS Mini device implements battery protection from too low temperature.
172
173 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
174
175 [[image:1733748045675-570.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
176
177 In this section:
178
179 * Enable – a flag to enable the protection;
180 * Minimum charge temperature, °C;
181 * Tolerant charge temperature, °C;
182 * Minimum 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 low temperature, the "Low temperature (CH)" and/or “Low temperature (DCH)” error are generated.
189
190 Error generation conditions:
191
192 * 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.
193
194 Conditions for removing the error:
195
196 * 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.
197
198 === High temperature ===
199
200 The BMS Mini device implements battery protection from too high temperature.
201
202 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
203
204 [[image:1733748045683-426.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
205
206 In this section:
207
208 * Enable – a flag to enable the protection;
209 * Maximum charge temperature, °C;
210 * Tolerant charge temperature, °C;
211 * Maximum discharge temperature, °C;
212 * Tolerant discharge temperature, °C;
213 * Delay before setting the error, millisecond;
214 * Delay before clearing the error, second;
215 * Lock – a flag to block the error until the device is restarted.
216
217 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
218
219 Error generation conditions:
220
221 * 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.
222
223 Conditions for removing the error:
224
225 * 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.
226
227 === Battery cover ===
228
229 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
230
231 [[image:1733748045685-763.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="92" width="800"]]
232
233 In this section:
234
235 * Enable – a flag to enable the protection;
236 * Delay before setting the error, millisecond;
237 * Delay before clearing the error, second;
238 * Lock – a flag to block the error until the device is restarted.
239
240 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
241
242 Error generation conditions:
243
244 * there is a signal from the battery cover during the “Delay before setting the error” time.
245
246 Conditions for removing the error:
247
248 * no signal from the battery cover during the “Delay before clearing the error” time.
249
250 (% class="box warningmessage" %)
251 (((
252 If there is the "Battery cover error", the **“Critical error” **is generated.
253 )))
254
255 === High board temperature ===
256
257 BMS Mini monitors its temperature and disables the cell balancing when it overheats.
258
259 To change the overheating protection parameters of BMS Mini device, select the "Protections → High board temperature" section:
260
261 [[image:1777295045614-956.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="136" width="800"]]In this section:
262
263 * Enable – a flag to enable the protection;
264 * Maximum temperature, °C;
265 * Tolerant temperature, °C;
266 * Delay before setting the error, second;
267 * Delay before clearing the error, second;
268 * Lock – lock the error until the device is reset.
269
270 As a result of the operation of the protection from high temperatures of BMS Mini device, the "High board temperature" is generated.
271
272 Error generation conditions:
273
274 * a BMS Mini device temperature is higher than the “Maximum temperature” value.
275
276 Conditions for removing the error:
277
278 * a BMS Mini device temperature is less than the “Tolerant temperature” value.
279
280 (% class="box infomessage" %)
281 (((
282 Cell balancing is disabled on BMS Mini device with high temperature.
283 )))
284
285 === Cell monitor offline ===
286
287 The BMS Mini device checks if there is connection with cell monitor and set an error if not.
288
289 To change the cell monitor offline protection parameters, select the "Protections → Cell monitor offline" section:
290
291 [[image:1733748045686-719.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="93" width="800"]]
292
293 In this section:
294
295 * Enable – a flag to enable the protection;
296 * Lock – a flag to block the error until the device is restarted.
297
298 As a result of the operation of the protection from the cell monitor offline, the "Cell monitor offline error" is generated.
299
300 Error generation conditions:
301
302 * there is not connection with the cell monitor.
303
304 Conditions for removing the error:
305
306 * connection with the cell monitor is established.
307
308 (% class="box warningmessage" %)
309 (((
310 If there is the " Cell monitor offline error", the **“Critical error” **is generated.
311 )))
312
313 === Cell count ===
314
315 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
316
317 [[image:1733748057078-555.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="103" width="800"]]
318
319 In this section:
320
321 * Enable – a flag to enable the protection;
322 * Number of cells – a number of cells connected to the BMS;
323 * Delay before setting the error, millisecond;
324 * Delay before clearing the error, second;
325 * Lock – a flag to block the error until the device is restarted.
326
327 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
328
329 Error generation conditions:
330
331 * 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.
332
333 Conditions for removing the error:
334
335 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
336
337 (% class="box warningmessage" %)
338 (((
339 If there is the "Cell count error", the **“Critical error” **is generated.
340 )))
341
342 === Temperature sensor count ===
343
344 To change the protection parameters from the mismatch of the number of temperature sensors to the set value, select the "Protections → Temperature sensor count" section:
345
346 [[image:1762773073782-768.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="130" width="800"]]
347
348 In this section:
349
350 * Enable – a flag to enable the protection;
351 * Number of cells – a number of temperature sensors connected to the BMS;
352 * Delay before setting the error, millisecond;
353 * Delay before clearing the error, second;
354 * Lock – a flag to block the error until the device is restarted.
355
356 As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
357
358 Error generation conditions:
359
360 * the number of temperature sensors connected to the BMS is **not equal** to the “Number of temperature sensors” value during the “Delay before setting the error” time.
361
362 Conditions for removing the error:
363
364 * the number of temperature sensors connected to the BMS is **equal** to the “Number of temperature sensors” value during the “Delay before clearing the error” time.
365
366 (% class="box warningmessage" %)
367 (((
368 If there is the "T-sensor count error", the **“Critical error” **is generated**.**
369 )))
370
371 === Short circuit ===
372
373 The BMS Mini device implements a protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
374
375 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
376
377 [[image:1733748057080-806.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="213" width="800"]]
378
379 In this section:
380
381 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
382 ** Enable – a flag to enable the protection;
383 ** Maximum current, A;
384 ** Delay before setting the error, second;
385 * Switch off the charging contactor on error – a flag to open the charging contactor when the "Short circuit" error occurs;
386 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Short circuit" error occurs;
387 * Delay before clearing the error, second;
388 * Lock – a flag to block the error until the device is restarted.
389
390 If there is a short circuit, the "Short circuit" error is generated.
391
392 Error generation conditions:
393
394 * 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.
395
396 Conditions for removing the error:
397
398 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
399
400 === High contactor temperature ===
401
402 The BMS Mini device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X6 connector is used.
403
404 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
405
406 [[image:1733748057082-234.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
407
408 In this section:
409
410 * Enable – a flag to enable the protection;
411 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
412 * Maximum contactor temperature, °C;
413 * Tolerant contactor temperature, °C;
414 * Delay before setting the error, second;
415 * Switch off the charging contactor on error – a flag to open the charging contactor when the "High contactor temperature" error occurs;
416 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "High contactor temperature" error occurs;
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 contactor overheat, the "High contactor temperature" error is generated.
421
422 Error generation conditions:
423
424 * the contactor temperature is greater than the “Maximum temperature” value during the “Delay before setting the error” time.
425
426 Conditions for removing the error:
427
428 * the contactor temperature is lower than the “Tolerant temperature” value during the “Delay before clearing the error” time.
429
430 If there is the "High contactor temperature" error, the **charging **contactor opens (the “Switch off the charging contactor on error” flag is set) and the **discharging **contactor opens (the “Switch off the discharging contactor on error” flag is set).
431
432 === Current sensor ===
433
434 The BMS Mini device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
435
436 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
437
438 [[image:1733748057083-985.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
439
440 In this section:
441
442 * Enable – a flag to enable the protection;
443 * Maximum voltage, V;
444 * Minimum voltage, V;
445 * Voltage hysteresis – a hysteresis value to clear the error, V;
446 * Delay before setting the error, second;
447 * Delay before clearing the error, second;
448 * Lock – a flag to block the error until the device is restarted.
449
450 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
451
452 Error generation conditions:
453
454 * the voltage in the signal line or zero level line of the current sensor is greater than the “Maximum voltage” value during the “Delay before setting the error” time;
455 * the voltage in the signal line or zero level line of the current sensor is less than the “Minimum voltage” value during the “Delay before setting the error” time.
456
457 Conditions for removing the error:
458
459 * the voltage in the signal line or zero level 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.
460
461 (% class="box warningmessage" %)
462 (((
463 If there is the “Current sensor error”, the **“Critical error” **is generated.
464 )))
465
466 === MOSFET ===
467
468 BMS Mini S device checks the status of MOSFET switches that are used to control the contactors. To change the parameters of the MOSFET switch protection, select the "Protections → MOSFET " section:
469
470 [[image:1762773566548-852.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
471
472 In this section:
473
474 * Delay before clearing the error, second;
475 * Lock – a flag to block the error until the device is restarted.
476
477 The “MOSFET error” occurs when the device detects a shortage in contactor coil control circuit or an overheating of the MOSFET switch. Error is removed when the temperature of MOSFET switch is normal during “Delay before clearing the error” time.
478
479 (% class="box warningmessage" %)
480 (((
481 If there is the "MOSFET error", the **“Critical error” **is generated.
482 )))
483
484 === Charge contactor cycles ===
485
486 The BMS Mini device protects the charging contactor against frequent switching.
487
488 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
489
490 [[image:1733748068419-377.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="140" width="800"]]
491
492 In this section:
493
494 * Enable – a flag to enable the protection;
495 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
496 * Check time – a time in which the BMS counts switchings of the charging contactor, second;
497 * Delay before setting the error, millisecond;
498 * Delay before clearing the error, second;
499 * Lock – a flag to block the error until the device is restarted.
500
501 If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
502
503 Error generation conditions:
504
505 * the number of switchings 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.
506
507 Conditions for removing the error:
508
509 * the “Delay before clearing the error” time has passed since the error was generated.
510
511 === Discharge contactor cycles ===
512
513 The BMS Mini device protects the discharging contactor against frequent switching.
514
515 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
516
517 [[image:1740571600741-802.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
518
519 In this section:
520
521 * Enable – a flag to enable the protection;
522 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
523 * Check time – a time in which the BMS counts switchings of the charging contactor, second;
524 * Delay before setting the error, millisecond;
525 * Delay before clearing the error, second;
526 * Lock – a flag to block the error until the device is restarted.
527
528 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
529
530 Error generation conditions:
531
532 * the number of switchings 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.
533
534 Conditions for removing the error:
535
536 * the “Delay before clearing the error” time has passed since the error was generated.
537
538 === Temperature sensors ===
539
540 The BMS Mini device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
541
542 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
543
544 [[image:1733748068421-819.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="115" width="800"]]
545
546 In this section:
547
548 * Enable – a flag to enable the protection;
549 * Delay before setting the error, millisecond;
550 * Delay before clearing the error, second;
551 * Lock – a flag to block the error until the device is restarted.
552
553 If there are no temperature sensors connected to the BMS Mini or any temperature sensor 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.
554
555 (% class="box warningmessage" %)
556 (((
557 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated.
558 )))
559
560 === WDT reset ===
561
562 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.
563
564 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
565
566 [[image:1733748068422-188.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
567
568 In this section:
569
570 * Enable – a flag to enable the protection;
571 * Delay before clearing the error, second;
572 * Lock – a flag to block the error until the device is restarted.
573
574 Conditions for removing the error:
575
576 * the “Delay before clearing the error” time has passed from the device startup.
577
578 (% class="box warningmessage" %)
579 (((
580 If there is the "WDT reset" error, the **“Critical error” **is generated.
581 )))
582
583 === Unallowable charging ===
584
585 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
586
587 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
588
589 [[image:1733748083466-209.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
590
591 In this section:
592
593 * Enable – a flag to enable the protection;
594 * Delay before setting the error, second;
595 * Delay before clearing the error, second;
596 * Lock – a flag to block the error until the device is restarted.
597
598 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
599
600 Error generation conditions:
601
602 * the charging contactor is open and the battery current is not zero during the “Delay before setting the error” time.
603
604 Conditions for removing the error:
605
606 * the battery current is zero during the “Delay before clearing the error” time.
607
608 === Stuck contactor ===
609
610 The BMS Mini device protects contactors against sticking.
611
612 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
613
614 [[image:1733748083467-352.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
615
616 In this section:
617
618 * Enable – a flag to enable the protection;
619 * Delay before setting the error, millisecond;
620 * Delay before clearing the error, second;
621 * Lock – a flag to block the error until the device is restarted.
622
623 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
624
625 * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
626
627 (% class="box warningmessage" %)
628 (((
629 If there is the "Stuck contactor" error, the **“Critical error” **is generated.
630 )))
631
632 === Contactor feedback ===
633
634 The BMS Mini 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 corresponding contactor feedback pin on X1 header.
635
636 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
637
638 [[image:1733748083468-378.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
639
640 In this section:
641
642 * Enable – a flag to enable the protection;
643 * Delay before setting the error, millisecond;
644 * Delay before clearing the error, second;
645 * Lock – a flag to block the error until the device is restarted.
646
647 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
648
649 * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
650
651 (% class="box warningmessage" %)
652 (((
653 If there is the "Contactor feedback" error, the **“Critical error” **is generated.
654 )))
655
656 === Insulation ===
657
658 The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
659
660 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
661
662 [[image:1740573733492-485.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="119" width="800"]]
663
664 In this section:
665
666 * Enable – a flag to enable the protection;
667 * Checking algorithm – isolation checking mode:
668 ** Always on – check is always performed;
669 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
670 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
671 * Delay before setting the error, second;
672 * Delay before clearing the error, second;
673 * Lock – a flag to block the error until the device is restarted.
674
675 Error is set if corresponding discrete input is set up and it receives logical zero.
676
677 (% class="box warningmessage" %)
678 (((
679 If there is the "Insulation" error, the **“Critical error” **is generated.
680 )))
681
682 === Critical error ===
683
684 To change the critical error parameters, select the "Protections → Critical error" section:
685
686 [[image:1762775067035-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
687
688 In this section:
689
690 * Enable – a flag to enable the protection;
691 * Delay before setting the error, millisecond;
692 * Delay before clearing the error, second;
693 * Errors 1,2 to ignore when setting the critical error;
694 * Lock – a flag to block the error until the device is restarted.
695
696 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.
697
698 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
699
700 === General error ===
701
702 To change the general error parameters, select the "Protections → Critical error" section:
703
704 [[image:1740573914327-561.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="129" width="800"]]
705
706 In this section:
707
708 * Enable – a flag to enable the protection;
709 * Delay before setting the error, millisecond;
710 * Delay before clearing the error, second;
711 * Lock – a flag to block the error until the device is restarted;
712 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
713
714 The “General error” is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
715
716 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
717
718 (% class="box warningmessage" %)
719 (((
720 The state of the “General error” can be assigned to a discrete output or to a power switch.
721 )))