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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 === Cell monitor offline ===
256
257 The BMS Mini device checks if there is connection with cell monitor and set an error if not.
258
259 To change the cell monitor offline protection parameters, select the "Protections → Cell monitor offline" section:
260
261 [[image:1733748045686-719.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="93" width="800"]]
262
263 In this section:
264
265 * Enable – a flag to enable the protection;
266 * Lock – a flag to block the error until the device is restarted.
267
268 As a result of the operation of the protection from the cell monitor offline, the "Cell monitor offline error" is generated.
269
270 Error generation conditions:
271
272 * there is not connection with the cell monitor.
273
274 Conditions for removing the error:
275
276 * connection with the cell monitor is established.
277
278 (% class="box warningmessage" %)
279 (((
280 If there is the " Cell monitor offline error", the **“Critical error” **is generated.
281 )))
282
283 === Cell count ===
284
285 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
286
287 [[image:1733748057078-555.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="103" width="800"]]
288
289 In this section:
290
291 * Enable – a flag to enable the protection;
292 * Number of cells – a number of cells connected to the BMS;
293 * Delay before setting the error, millisecond;
294 * Delay before clearing the error, second;
295 * Lock – a flag to block the error until the device is restarted.
296
297 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
298
299 Error generation conditions:
300
301 * 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.
302
303 Conditions for removing the error:
304
305 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
306
307 (% class="box warningmessage" %)
308 (((
309 If there is the "Cell count error", the **“Critical error” **is generated.
310 )))
311
312 === Temperature sensor count ===
313
314 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:
315
316 [[image:1762773073782-768.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="130" width="800"]]
317
318 In this section:
319
320 * Enable – a flag to enable the protection;
321 * Number of cells – a number of temperature sensors connected to the BMS;
322 * Delay before setting the error, millisecond;
323 * Delay before clearing the error, second;
324 * Lock – a flag to block the error until the device is restarted.
325
326 As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
327
328 Error generation conditions:
329
330 * 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.
331
332 Conditions for removing the error:
333
334 * 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.
335
336 (% class="box warningmessage" %)
337 (((
338 If there is the "T-sensor count error", the **“Critical error” **is generated**.**
339 )))
340
341 === Short circuit ===
342
343 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.
344
345 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
346
347 [[image:1733748057080-806.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="213" width="800"]]
348
349 In this section:
350
351 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
352 ** Enable – a flag to enable the protection;
353 ** Maximum current, A;
354 ** Delay before setting the error, second;
355 * Switch off the charging contactor on error – a flag to open the charging contactor when the "Short circuit" error occurs;
356 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Short circuit" error occurs;
357 * Delay before clearing the error, second;
358 * Lock – a flag to block the error until the device is restarted.
359
360 If there is a short circuit, the "Short circuit" error is generated.
361
362 Error generation conditions:
363
364 * 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.
365
366 Conditions for removing the error:
367
368 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
369
370 === High contactor temperature ===
371
372 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.
373
374 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
375
376 [[image:1733748057082-234.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
377
378 In this section:
379
380 * Enable – a flag to enable the protection;
381 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
382 * Maximum contactor temperature, °C;
383 * Tolerant contactor temperature, °C;
384 * Delay before setting the error, second;
385 * Switch off the charging contactor on error – a flag to open the charging contactor when the "High contactor temperature" error occurs;
386 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "High contactor temperature" 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 contactor overheat, the "High contactor temperature" error is generated.
391
392 Error generation conditions:
393
394 * the contactor temperature is greater than the “Maximum temperature” value during the “Delay before setting the error” time.
395
396 Conditions for removing the error:
397
398 * the contactor temperature is lower than the “Tolerant temperature” value during the “Delay before clearing the error” time.
399
400 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).
401
402 === Current sensor ===
403
404 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.
405
406 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
407
408 [[image:1733748057083-985.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
409
410 In this section:
411
412 * Enable – a flag to enable the protection;
413 * Maximum voltage, V;
414 * Minimum voltage, V;
415 * Voltage hysteresis – a hysteresis value to clear the error, V;
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 an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
421
422 Error generation conditions:
423
424 * 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;
425 * 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.
426
427 Conditions for removing the error:
428
429 * 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.
430
431 (% class="box warningmessage" %)
432 (((
433 If there is the “Current sensor error”, the **“Critical error” **is generated.
434 )))
435
436 === MOSFET ===
437
438 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:
439
440 [[image:1762773566548-852.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
441
442 In this section:
443
444 * Delay before clearing the error, second;
445 * Lock – a flag to block the error until the device is restarted.
446
447 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.
448
449 (% class="box warningmessage" %)
450 (((
451 If there is the "MOSFET error", the **“Critical error” **is generated.
452 )))
453
454 === Charge contactor cycles ===
455
456 The BMS Mini device protects the charging contactor against frequent switching.
457
458 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
459
460 [[image:1733748068419-377.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="140" width="800"]]
461
462 In this section:
463
464 * Enable – a flag to enable the protection;
465 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
466 * Check time – a time in which the BMS counts switchings of the charging contactor, second;
467 * Delay before setting the error, millisecond;
468 * Delay before clearing the error, second;
469 * Lock – a flag to block the error until the device is restarted.
470
471 If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
472
473 Error generation conditions:
474
475 * 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.
476
477 Conditions for removing the error:
478
479 * the “Delay before clearing the error” time has passed since the error was generated.
480
481 === Discharge contactor cycles ===
482
483 The BMS Mini device protects the discharging contactor against frequent switching.
484
485 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
486
487 [[image:1740571600741-802.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
488
489 In this section:
490
491 * Enable – a flag to enable the protection;
492 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
493 * Check time – a time in which the BMS counts switchings of the charging contactor, second;
494 * Delay before setting the error, millisecond;
495 * Delay before clearing the error, second;
496 * Lock – a flag to block the error until the device is restarted.
497
498 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
499
500 Error generation conditions:
501
502 * 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.
503
504 Conditions for removing the error:
505
506 * the “Delay before clearing the error” time has passed since the error was generated.
507
508 === Temperature sensors ===
509
510 The BMS Mini device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
511
512 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
513
514 [[image:1733748068421-819.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="115" width="800"]]
515
516 In this section:
517
518 * Enable – a flag to enable the protection;
519 * Delay before setting the error, millisecond;
520 * Delay before clearing the error, second;
521 * Lock – a flag to block the error until the device is restarted.
522
523 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.
524
525 (% class="box warningmessage" %)
526 (((
527 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated.
528 )))
529
530 === WDT reset ===
531
532 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.
533
534 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
535
536 [[image:1733748068422-188.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
537
538 In this section:
539
540 * Enable – a flag to enable the protection;
541 * Delay before clearing the error, second;
542 * Lock – a flag to block the error until the device is restarted.
543
544 Conditions for removing the error:
545
546 * the “Delay before clearing the error” time has passed from the device startup.
547
548 (% class="box warningmessage" %)
549 (((
550 If there is the "WDT reset" error, the **“Critical error” **is generated.
551 )))
552
553 === Unallowable charging ===
554
555 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
556
557 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
558
559 [[image:1733748083466-209.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
560
561 In this section:
562
563 * Enable – a flag to enable the protection;
564 * Delay before setting the error, second;
565 * Delay before clearing the error, second;
566 * Lock – a flag to block the error until the device is restarted.
567
568 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
569
570 Error generation conditions:
571
572 * the charging contactor is open and the battery current is not zero during the “Delay before setting the error” time.
573
574 Conditions for removing the error:
575
576 * the battery current is zero during the “Delay before clearing the error” time.
577
578 === Stuck contactor ===
579
580 The BMS Mini device protects contactors against sticking.
581
582 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
583
584 [[image:1733748083467-352.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
585
586 In this section:
587
588 * Enable – a flag to enable the protection;
589 * Delay before setting the error, millisecond;
590 * Delay before clearing the error, second;
591 * Lock – a flag to block the error until the device is restarted.
592
593 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
594
595 * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
596
597 (% class="box warningmessage" %)
598 (((
599 If there is the "Stuck contactor" error, the **“Critical error” **is generated.
600 )))
601
602 === Contactor feedback ===
603
604 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.
605
606 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
607
608 [[image:1733748083468-378.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
609
610 In this section:
611
612 * Enable – a flag to enable the protection;
613 * Delay before setting the error, millisecond;
614 * Delay before clearing the error, second;
615 * Lock – a flag to block the error until the device is restarted.
616
617 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
618
619 * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
620
621 (% class="box warningmessage" %)
622 (((
623 If there is the "Contactor feedback" error, the **“Critical error” **is generated.
624 )))
625
626 === Insulation ===
627
628 The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
629
630 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
631
632 [[image:1740573733492-485.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="119" width="800"]]
633
634 In this section:
635
636 * Enable – a flag to enable the protection;
637 * Checking algorithm – isolation checking mode:
638 ** Always on – check is always performed;
639 ** On charging – check is performed only if “Charger connected” or “Charge request” is set;
640 ** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
641 * Delay before setting the error, second;
642 * Delay before clearing the error, second;
643 * Lock – a flag to block the error until the device is restarted.
644
645 Error is set if corresponding discrete input is set up and it receives logical zero.
646
647 (% class="box warningmessage" %)
648 (((
649 If there is the "Insulation" error, the **“Critical error” **is generated.
650 )))
651
652 === Critical error ===
653
654 To change the critical error parameters, select the "Protections → Critical error" section:
655
656 [[image:1762775067035-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
657
658 In this section:
659
660 * Enable – a flag to enable the protection;
661 * Delay before setting the error, millisecond;
662 * Delay before clearing the error, second;
663 * Errors 1,2 to ignore when setting the critical error;
664 * Lock – a flag to block the error until the device is restarted.
665
666 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.
667
668 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
669
670 === General error ===
671
672 To change the general error parameters, select the "Protections → Critical error" section:
673
674 [[image:1740573914327-561.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="129" 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 * Lock – a flag to block the error until the device is restarted;
682 * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
683
684 The “General error” is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
685
686 The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
687
688 (% class="box warningmessage" %)
689 (((
690 The state of the “General error” can be assigned to a discrete output or to a power switch.
691 )))