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Changes for page 3.4 Protections

Last modified by Admin on 2025/11/10 11:45
From version 25.1
edited by Admin
on 2025/11/10 11:21
Change comment: There is no comment for this version
To version 1.4
edited by Admin
on 2024/12/11 13:11
Change comment: Update document after refactoring.

Summary

Details

Page properties
Content
... ... @@ -6,12 +6,6 @@
6 6  
7 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 8  
9 -(% class="box errormessage" %)
10 -(((
11 -**Attention!**
12 -Behavior of contactors at different errors is configured in **corresponding contactor settings**!
13 -)))
14 -
15 15  === Overcurrent ===
16 16  
17 17  The BMS Mini device performs the overcurrent protection depending on current sensor values.
... ... @@ -43,46 +43,11 @@
43 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 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 45  
46 -=== Charge current limit ===
40 +(% class="box infomessage" %)
41 +(((
42 +If there is the "Overcurrent" error, the **charging **and **discharging **contactors open.
43 +)))
47 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 86  === Undervoltage ===
87 87  
88 88  The BMS Mini device implements battery protection from too low voltage on the cells.
... ... @@ -89,7 +89,7 @@
89 89  
90 90  To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
91 91  
92 -[[image:1740571345293-460.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
51 +[[image:1733748033237-837.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
93 93  
94 94  In this section:
95 95  
... ... @@ -96,7 +96,6 @@
96 96  * Enable – a flag to enable the protection;
97 97  * Minimum cell voltage, V;
98 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;
100 100  * Delay before setting the error, millisecond;
101 101  * Delay before clearing the error, second;
102 102  * Lock – a flag to block the error until the device is restarted.
... ... @@ -111,6 +111,11 @@
111 111  
112 112  * 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.
113 113  
72 +(% class="box infomessage" %)
73 +(((
74 +If there is the "Undervoltage" error, the **discharging **contactor opens.
75 +)))
76 +
114 114  === Overvoltage ===
115 115  
116 116  The BMS Mini device implements battery protection from too high voltage on the cells.
... ... @@ -117,7 +117,7 @@
117 117  
118 118  To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
119 119  
120 -[[image:1740571383842-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="147" width="800"]]
83 +[[image:1733748033238-995.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
121 121  
122 122  In this section:
123 123  
... ... @@ -124,9 +124,9 @@
124 124  * Enable – a flag to enable the protection;
125 125  * Maximum cell voltage, V;
126 126  * 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;
128 128  * Delay before setting the error, millisecond;
129 129  * Delay before clearing the error, second;
92 +* Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Overvoltage" error is generated;
130 130  * Lock – a flag to block the error until the device is restarted.
131 131  
132 132  As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
... ... @@ -139,33 +139,11 @@
139 139  
140 140  * 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.
141 141  
142 -=== Cell imbalance ===
105 +(% class="box infomessage" %)
106 +(((
107 +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).
108 +)))
143 143  
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 -
169 169  === Low temperature ===
170 170  
171 171  The BMS Mini device implements battery protection from too low temperature.
... ... @@ -195,6 +195,11 @@
195 195  
196 196  * 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.
197 197  
139 +(% class="box infomessage" %)
140 +(((
141 +If there is the "Low temperature (CH)" error, the **charging **contactor opens. If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
142 +)))
143 +
198 198  === High temperature ===
199 199  
200 200  The BMS Mini device implements battery protection from too high temperature.
... ... @@ -224,6 +224,11 @@
224 224  
225 225  * 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.
226 226  
173 +(% class="box infomessage" %)
174 +(((
175 +If there is the "High temperature (CH)" error, the **charging **contactor opens. If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
176 +)))
177 +
227 227  === Battery cover ===
228 228  
229 229  To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
... ... @@ -249,7 +249,7 @@
249 249  
250 250  (% class="box warningmessage" %)
251 251  (((
252 -If there is the "Battery cover error", the **“Critical error” **is generated.
203 +If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
253 253  )))
254 254  
255 255  === Cell monitor offline ===
... ... @@ -277,7 +277,7 @@
277 277  
278 278  (% class="box warningmessage" %)
279 279  (((
280 -If there is the " Cell monitor offline error", the **“Critical error” **is generated.
231 +If there is the " Cell monitor offline error", the **“Critical error” **is generated and** all contactors open.**
281 281  )))
282 282  
283 283  === Cell count ===
... ... @@ -306,38 +306,9 @@
306 306  
307 307  (% class="box warningmessage" %)
308 308  (((
309 -If there is the "Cell count error", the **“Critical error” **is generated.
260 +If there is the "Cell count error", the **“Critical error” **is generated and **all contactors open.**
310 310  )))
311 311  
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 -
341 341  === Short circuit ===
342 342  
343 343  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.
... ... @@ -367,6 +367,11 @@
367 367  
368 368  * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
369 369  
292 +(% class="box infomessage" %)
293 +(((
294 +If there is the "Short circuit" 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).
295 +)))
296 +
370 370  === High contactor temperature ===
371 371  
372 372  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.
... ... @@ -430,27 +430,9 @@
430 430  
431 431  (% class="box warningmessage" %)
432 432  (((
433 -If there is the “Current sensor error”, the **“Critical error” **is generated.
360 +If there is the “Current sensor error”, the **“Critical error” **is generated and** all contactors open.**
434 434  )))
435 435  
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 -
454 454  === Charge contactor cycles ===
455 455  
456 456  The BMS Mini device protects the charging contactor against frequent switching.
... ... @@ -467,6 +467,7 @@
467 467  * Delay before setting the error, millisecond;
468 468  * Delay before clearing the error, second;
469 469  * Lock – a flag to block the error until the device is restarted.
379 +* Number of cycles – a number of the charging contactor switchings made during battery operation.
470 470  
471 471  If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
472 472  
... ... @@ -478,13 +478,18 @@
478 478  
479 479  * the “Delay before clearing the error” time has passed since the error was generated.
480 480  
481 -=== Discharge contactor cycles ===
391 +(% class="box infomessage" %)
392 +(((
393 +If there is the "CH contactor cycles error" error, the **charging** contactor opens.
394 +)))
482 482  
396 +=== Discharge contactor cycles protection ===
397 +
483 483  The BMS Mini device protects the discharging contactor against frequent switching.
484 484  
485 485  To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
486 486  
487 -[[image:1740571600741-802.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
402 +[[image:1733748068420-615.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
488 488  
489 489  In this section:
490 490  
... ... @@ -494,6 +494,7 @@
494 494  * Delay before setting the error, millisecond;
495 495  * Delay before clearing the error, second;
496 496  * Lock – a flag to block the error until the device is restarted.
412 +* Number of cycles – a number of the charging contactor switchings made during battery operation.
497 497  
498 498  If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
499 499  
... ... @@ -505,6 +505,11 @@
505 505  
506 506  * the “Delay before clearing the error” time has passed since the error was generated.
507 507  
424 +(% class="box infomessage" %)
425 +(((
426 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
427 +)))
428 +
508 508  === Temperature sensors ===
509 509  
510 510  The BMS Mini device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
... ... @@ -524,7 +524,7 @@
524 524  
525 525  (% class="box warningmessage" %)
526 526  (((
527 -If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated.
448 +If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated and **all contactors open.**
528 528  )))
529 529  
530 530  === WDT reset ===
... ... @@ -547,7 +547,7 @@
547 547  
548 548  (% class="box warningmessage" %)
549 549  (((
550 -If there is the "WDT reset" error, the **“Critical error” **is generated.
471 +If there is the "WDT reset" error, the **“Critical error” **is generated and **all contactors open.**
551 551  )))
552 552  
553 553  === Unallowable charging ===
... ... @@ -575,6 +575,11 @@
575 575  
576 576  * the battery current is zero during the “Delay before clearing the error” time.
577 577  
499 +(% class="box infomessage" %)
500 +(((
501 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
502 +)))
503 +
578 578  === Stuck contactor ===
579 579  
580 580  The BMS Mini device protects contactors against sticking.
... ... @@ -590,15 +590,10 @@
590 590  * Delay before clearing the error, second;
591 591  * Lock – a flag to block the error until the device is restarted.
592 592  
593 -If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
519 +If there is a stuck contactor, the “Stuck contactor” error is generated Error generation conditions:
594 594  
595 595  * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
596 596  
597 -(% class="box warningmessage" %)
598 -(((
599 -If there is the "Stuck contactor" error, the **“Critical error” **is generated.
600 -)))
601 -
602 602  === Contactor feedback ===
603 603  
604 604  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.
... ... @@ -618,11 +618,6 @@
618 618  
619 619  * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
620 620  
621 -(% class="box warningmessage" %)
622 -(((
623 -If there is the "Contactor feedback" error, the **“Critical error” **is generated.
624 -)))
625 -
626 626  === Insulation ===
627 627  
628 628  The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
... ... @@ -629,15 +629,11 @@
629 629  
630 630  To change the insulation monitoring parameters, select the "Protections → Insulation" section:
631 631  
632 -[[image:1740573733492-485.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="119" width="800"]]
548 +[[image:1733748083469-478.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
633 633  
634 634  In this section:
635 635  
636 636  * 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;
641 641  * Delay before setting the error, second;
642 642  * Delay before clearing the error, second;
643 643  * Lock – a flag to block the error until the device is restarted.
... ... @@ -644,11 +644,6 @@
644 644  
645 645  Error is set if corresponding discrete input is set up and it receives logical zero.
646 646  
647 -(% class="box warningmessage" %)
648 -(((
649 -If there is the "Insulation" error, the **“Critical error” **is generated.
650 -)))
651 -
652 652  === Critical error ===
653 653  
654 654  To change the critical error parameters, select the "Protections → Critical error" section:
... ... @@ -662,29 +662,26 @@
662 662  * Delay before clearing the error, second;
663 663  * Lock – a flag to block the error until the device is restarted.
664 664  
665 -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.
572 +The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
666 666  
574 +* “Battery cover error”;
575 +* “Cell monitor offline”;
576 +* “Cell count error”;
577 +* “ADC error”;
578 +* “Current sensor error”;
579 +* “Shunt offline”;
580 +* “Shunt error”;
581 +* “No temp. sensors”;
582 +* “Temp. sensor is shorted”;
583 +* “Settings error”;
584 +* “WDT reset”;
585 +* “Stuck contactor”;
586 +* “Contactor feedback error”;
587 +* “Insulation fault”.
588 +
667 667  The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
668 668  
669 -=== General error ===
670 -
671 -To change the general error parameters, select the "Protections → Critical error" section:
672 -
673 -[[image:1740573914327-561.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="129" width="800"]]
674 -
675 -In this section:
676 -
677 -* Enable – a flag to enable the protection;
678 -* Delay before setting the error, millisecond;
679 -* Delay before clearing the error, second;
680 -* Lock – a flag to block the error until the device is restarted;
681 -* Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
682 -
683 -The “General error” is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
684 -
685 -The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
686 -
687 687  (% class="box warningmessage" %)
688 688  (((
689 -The state of the “General error” can be assigned to a discrete output or to a power switch.
593 +If there is the “Critical error”, **all contactors open.**
690 690  )))
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