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Changes for page 3.4 Protections

Last modified by Admin on 2026/04/27 13:04
From version 30.1
edited by Admin
on 2026/04/27 13:04
Change comment: There is no comment for this version
To version 1.6
edited by Admin
on 2025/02/24 14:09
Change comment: There is no comment for this version

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... ... @@ -43,46 +43,7 @@
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 ===
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"]]
53 +[[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 +111,7 @@
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  
74 +
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"]]
81 +[[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;
90 +* 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 +139,6 @@
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 ===
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.
... ... @@ -252,36 +252,6 @@
252 252  If there is the "Battery cover error", the **“Critical error” **is generated.
253 253  )))
254 254  
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 -
285 285  === Cell monitor offline ===
286 286  
287 287  The BMS Mini device checks if there is connection with cell monitor and set an error if not.
... ... @@ -307,7 +307,7 @@
307 307  
308 308  (% class="box warningmessage" %)
309 309  (((
310 -If there is the " Cell monitor offline error", the **“Critical error” **is generated.
214 +If there is the " Cell monitor offline error", the **“Critical error” **is generated and** all contactors open.**
311 311  )))
312 312  
313 313  === Cell count ===
... ... @@ -336,38 +336,9 @@
336 336  
337 337  (% class="box warningmessage" %)
338 338  (((
339 -If there is the "Cell count error", the **“Critical error” **is generated.
243 +If there is the "Cell count error", the **“Critical error” **is generated and **all contactors open.**
340 340  )))
341 341  
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 -
371 371  === Short circuit ===
372 372  
373 373  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.
... ... @@ -397,6 +397,11 @@
397 397  
398 398  * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
399 399  
275 +(% class="box infomessage" %)
276 +(((
277 +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).
278 +)))
279 +
400 400  === High contactor temperature ===
401 401  
402 402  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.
... ... @@ -460,27 +460,9 @@
460 460  
461 461  (% class="box warningmessage" %)
462 462  (((
463 -If there is the “Current sensor error”, the **“Critical error” **is generated.
343 +If there is the “Current sensor error”, the **“Critical error” **is generated and** all contactors open.**
464 464  )))
465 465  
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 -
484 484  === Charge contactor cycles ===
485 485  
486 486  The BMS Mini device protects the charging contactor against frequent switching.
... ... @@ -497,6 +497,7 @@
497 497  * Delay before setting the error, millisecond;
498 498  * Delay before clearing the error, second;
499 499  * Lock – a flag to block the error until the device is restarted.
362 +* Number of cycles – a number of the charging contactor switchings made during battery operation.
500 500  
501 501  If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
502 502  
... ... @@ -508,13 +508,18 @@
508 508  
509 509  * the “Delay before clearing the error” time has passed since the error was generated.
510 510  
511 -=== Discharge contactor cycles ===
374 +(% class="box infomessage" %)
375 +(((
376 +If there is the "CH contactor cycles error" error, the **charging** contactor opens.
377 +)))
512 512  
379 +=== Discharge contactor cycles protection ===
380 +
513 513  The BMS Mini device protects the discharging contactor against frequent switching.
514 514  
515 515  To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
516 516  
517 -[[image:1740571600741-802.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
385 +[[image:1733748068420-615.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
518 518  
519 519  In this section:
520 520  
... ... @@ -524,6 +524,7 @@
524 524  * Delay before setting the error, millisecond;
525 525  * Delay before clearing the error, second;
526 526  * Lock – a flag to block the error until the device is restarted.
395 +* Number of cycles – a number of the charging contactor switchings made during battery operation.
527 527  
528 528  If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
529 529  
... ... @@ -535,6 +535,11 @@
535 535  
536 536  * the “Delay before clearing the error” time has passed since the error was generated.
537 537  
407 +(% class="box infomessage" %)
408 +(((
409 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
410 +)))
411 +
538 538  === Temperature sensors ===
539 539  
540 540  The BMS Mini device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
... ... @@ -554,7 +554,7 @@
554 554  
555 555  (% class="box warningmessage" %)
556 556  (((
557 -If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated.
431 +If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated and **all contactors open.**
558 558  )))
559 559  
560 560  === WDT reset ===
... ... @@ -577,7 +577,7 @@
577 577  
578 578  (% class="box warningmessage" %)
579 579  (((
580 -If there is the "WDT reset" error, the **“Critical error” **is generated.
454 +If there is the "WDT reset" error, the **“Critical error” **is generated and **all contactors open.**
581 581  )))
582 582  
583 583  === Unallowable charging ===
... ... @@ -605,6 +605,11 @@
605 605  
606 606  * the battery current is zero during the “Delay before clearing the error” time.
607 607  
482 +(% class="box infomessage" %)
483 +(((
484 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
485 +)))
486 +
608 608  === Stuck contactor ===
609 609  
610 610  The BMS Mini device protects contactors against sticking.
... ... @@ -620,15 +620,10 @@
620 620  * Delay before clearing the error, second;
621 621  * Lock – a flag to block the error until the device is restarted.
622 622  
623 -If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
502 +If there is a stuck contactor, the “Stuck contactor” error is generated Error generation conditions:
624 624  
625 625  * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
626 626  
627 -(% class="box warningmessage" %)
628 -(((
629 -If there is the "Stuck contactor" error, the **“Critical error” **is generated.
630 -)))
631 -
632 632  === Contactor feedback ===
633 633  
634 634  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.
... ... @@ -648,11 +648,6 @@
648 648  
649 649  * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
650 650  
651 -(% class="box warningmessage" %)
652 -(((
653 -If there is the "Contactor feedback" error, the **“Critical error” **is generated.
654 -)))
655 -
656 656  === Insulation ===
657 657  
658 658  The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
... ... @@ -659,15 +659,11 @@
659 659  
660 660  To change the insulation monitoring parameters, select the "Protections → Insulation" section:
661 661  
662 -[[image:1740573733492-485.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="119" width="800"]]
531 +[[image:1733748083469-478.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
663 663  
664 664  In this section:
665 665  
666 666  * 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;
671 671  * Delay before setting the error, second;
672 672  * Delay before clearing the error, second;
673 673  * Lock – a flag to block the error until the device is restarted.
... ... @@ -674,16 +674,11 @@
674 674  
675 675  Error is set if corresponding discrete input is set up and it receives logical zero.
676 676  
677 -(% class="box warningmessage" %)
678 -(((
679 -If there is the "Insulation" error, the **“Critical error” **is generated.
680 -)))
681 -
682 682  === Critical error ===
683 683  
684 684  To change the critical error parameters, select the "Protections → Critical error" section:
685 685  
686 -[[image:1762775067035-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
546 +[[image:1733748083469-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
687 687  
688 688  In this section:
689 689  
... ... @@ -690,32 +690,28 @@
690 690  * Enable – a flag to enable the protection;
691 691  * Delay before setting the error, millisecond;
692 692  * Delay before clearing the error, second;
693 -* Errors 1,2 to ignore when setting the critical error;
694 694  * Lock – a flag to block the error until the device is restarted.
695 695  
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.
555 +The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
697 697  
557 +* “Battery cover error”;
558 +* “Cell monitor offline”;
559 +* “Cell count error”;
560 +* “ADC error”;
561 +* “Current sensor error”;
562 +* “Shunt offline”;
563 +* “Shunt error”;
564 +* “No temp. sensors”;
565 +* “Temp. sensor is shorted”;
566 +* “Settings error”;
567 +* “WDT reset”;
568 +* “Stuck contactor”;
569 +* “Contactor feedback error”;
570 +* “Insulation fault”.
571 +
698 698  The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
699 699  
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 -
718 718  (% class="box warningmessage" %)
719 719  (((
720 -The state of the “General error” can be assigned to a discrete output or to a power switch.
576 +If there is the “Critical error”, **all contactors open.**
721 721  )))
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