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Changes for page 3.4 Protections

Last modified by Admin on 2025/08/22 14:36
From version 35.2
edited by Admin
on 2025/08/22 14:06
Change comment: There is no comment for this version
To version 16.13
edited by Admin
on 2024/12/26 15:04
Change comment: There is no comment for this version

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Content
... ... @@ -6,12 +6,6 @@
6 6  
7 7  The BMS Main 3 device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
8 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 Main 3 device performs the overcurrent protection depending on current sensor values.
... ... @@ -43,44 +43,27 @@
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) or zero, and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
45 45  
40 +(% class="box infomessage" %)
41 +(((
42 +If there is the "Overcurrent" error, the **charging **and **discharging **contactors open.
43 +)))
44 +
46 46  === Charge current limit ===
47 47  
48 -The BMS Main 3 device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
47 +The BMS Main 3 device can check the charging current with the limit based on the Charge map. If current is more than estimated maximum, "Current limit" error is generated.
49 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 52  To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
53 53  
54 54  [[image:1735225207687-430.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
55 55  
56 56  * Enable – a flag to enable the protection;
57 -* 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;
58 -* Region 1: Current difference – a value of maximum absolute current difference, A;
59 -* Region 2: Current difference – a value of maximum relative current excess, A;
60 -* Delay before setting the error, millisecond;
61 -* Delay before clearing the error, second;
62 -* Lock – a flag to block the error until the device is restarted.
54 +* Threshold to switch from Region 1 to Region 2
63 63  
56 +
64 64  === Discharge current limit ===
65 65  
66 -The BMS Main 3 device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
59 +TBA
67 67  
68 -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.
69 -
70 -To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
71 -
72 -[[image:1735225942893-869.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
73 -
74 -In this section:
75 -
76 -* Enable – a flag to enable the protection;
77 -* 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;
78 -* Region 1: Current difference – a value of maximum absolute current difference, A;
79 -* Region 2: Current difference – a value of maximum relative current excess, A;
80 -* Delay before setting the error, millisecond;
81 -* Delay before clearing the error, second;
82 -* Lock – a flag to block the error until the device is restarted.
83 -
84 84  === Undervoltage ===
85 85  
86 86  The BMS Main 3 device implements battery protection from too low voltage on the cells.
... ... @@ -94,7 +94,7 @@
94 94  * Enable – a flag to enable the protection;
95 95  * Minimum cell voltage, V;
96 96  * Tolerant cell voltage, V;
97 -* 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;
74 +* Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
98 98  * Delay before setting the error, millisecond;
99 99  * Delay before clearing the error, second;
100 100  * Lock – a flag to block the error until the device is restarted.
... ... @@ -109,6 +109,11 @@
109 109  
110 110  * 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.
111 111  
89 +(% class="box infomessage" %)
90 +(((
91 +If there is the "Undervoltage" error, the **discharging **contactor opens.
92 +)))
93 +
112 112  === Overvoltage ===
113 113  
114 114  The BMS Main 3 device implements battery protection from too high voltage on the cells.
... ... @@ -122,7 +122,7 @@
122 122  * Enable – a flag to enable the protection;
123 123  * Maximum cell voltage, V;
124 124  * Tolerant cell voltage, V;
125 -* 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;
107 +* Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
126 126  * Delay before setting the error, millisecond;
127 127  * Delay before clearing the error, second;
128 128  * Lock – a flag to block the error until the device is restarted.
... ... @@ -137,6 +137,11 @@
137 137  
138 138  * 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.
139 139  
122 +(% class="box infomessage" %)
123 +(((
124 +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).
125 +)))
126 +
140 140  === Low temperature ===
141 141  
142 142  The BMS Main 3 device implements battery protection from too low temperature.
... ... @@ -166,6 +166,12 @@
166 166  
167 167  * 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.
168 168  
156 +(% class="box infomessage" %)
157 +(((
158 +If there is the "Low temperature (CH)" error, the **charging **contactor opens.
159 +If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
160 +)))
161 +
169 169  === High temperature ===
170 170  
171 171  The BMS Main 3 device implements battery protection from too high temperature.
... ... @@ -195,6 +195,12 @@
195 195  
196 196  * 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.
197 197  
191 +(% class="box infomessage" %)
192 +(((
193 +If there is the "High temperature (CH)" error, the **charging **contactor opens.
194 +If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
195 +)))
196 +
198 198  === Battery cover ===
199 199  
200 200  To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
... ... @@ -220,7 +220,7 @@
220 220  
221 221  (% class="box warningmessage" %)
222 222  (((
223 -If there is the "Battery cover error", the **“Critical error” **is generated**.**
222 +If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
224 224  )))
225 225  
226 226  === High humidity ===
... ... @@ -282,9 +282,9 @@
282 282  
283 283  * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
284 284  
285 -(% class="box warningmessage" %)
284 +(% class="box infomessage" %)
286 286  (((
287 -If there is the “Water” error, the **“Critical error”** is generated.
286 +If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
288 288  )))
289 289  
290 290  === Logic high temperature ===
... ... @@ -321,14 +321,11 @@
321 321  
322 322  To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
323 323  
324 -[[image:1755871522789-489.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
323 +[[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
325 325  
326 -
327 327  In this section:
328 328  
329 329  * Enable – a flag to enable the protection;
330 -* Delay before setting the error, second;
331 -* Delay before clearing the error, second;
332 332  * Lock – lock the error until the device is reset.
333 333  
334 334  As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
... ... @@ -343,7 +343,7 @@
343 343  
344 344  (% class="box warningmessage" %)
345 345  (((
346 -If there is the "Logic offline" error, the **“Critical error” **is generated**.**
342 +If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
347 347  )))
348 348  
349 349  === Cell count ===
... ... @@ -372,38 +372,9 @@
372 372  
373 373  (% class="box warningmessage" %)
374 374  (((
375 -If there is the "Cell count error", the **“Critical error” **is generated**.**
371 +If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
376 376  )))
377 377  
378 -=== Temperature sensor count ===
379 -
380 -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:
381 -
382 -[[image:1755871582533-550.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
383 -
384 -In this section:
385 -
386 -* Enable – a flag to enable the protection;
387 -* Number of cells – a number of temperature sensors connected to the BMS;
388 -* Delay before setting the error, millisecond;
389 -* Delay before clearing the error, second;
390 -* Lock – a flag to block the error until the device is restarted.
391 -
392 -As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensocount error" is generated.
393 -
394 -Error generation conditions:
395 -
396 -* 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.
397 -
398 -Conditions for removing the error:
399 -
400 -* the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
401 -
402 -(% class="box warningmessage" %)
403 -(((
404 -If there is the "Cell count error", the **“Critical error” **is generated**.**
405 -)))
406 -
407 407  === Logic count ===
408 408  
409 409  To change the protection parameters from the mismatch of the number of BMS Logic devices to the set value, select the "Protections → Logic count” section:
... ... @@ -429,7 +429,7 @@
429 429  
430 430  (% class="box warningmessage" %)
431 431  (((
432 -If there is the "Logic count error", the **“Critical error”** is generated.
399 +If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
433 433  )))
434 434  
435 435  === Short circuit ===
... ... @@ -459,6 +459,11 @@
459 459  
460 460  * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
461 461  
429 +(% class="box infomessage" %)
430 +(((
431 +If there is the "Short circuit" error, **charging **contactor opens (if the “Switch off the charging contactor on error” flag is set) and **discharging **contactor opens (if the “Switch off the discharging contactor on error flag” is set).
432 +)))
433 +
462 462  === High contactor temperature ===
463 463  
464 464  The BMS Main 3 device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X5 connector is used.
... ... @@ -487,6 +487,11 @@
487 487  
488 488  * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
489 489  
462 +(% class="box infomessage" %)
463 +(((
464 +If there is the "High contactor temperature" error, **charging **contactor opens (if the “Switch off the charging contactor on error” flag is set) and **discharging **contactor opens (if the “Switch off the discharging contactor on error” flag is set).
465 +)))
466 +
490 490  === Current sensor ===
491 491  
492 492  The BMS Main 3 device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
... ... @@ -518,7 +518,7 @@
518 518  
519 519  (% class="box warningmessage" %)
520 520  (((
521 -If there is the “Current sensor error”, the **“Critical error” **is generated.
498 +If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
522 522  )))
523 523  
524 524  === Power switch ===
... ... @@ -536,39 +536,13 @@
536 536  
537 537  (% class="box warningmessage" %)
538 538  (((
539 -If there is the "Power switch error", the **“Critical error” **is generated.
516 +If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
540 540  )))
541 541  
542 542  === Power fault ===
543 543  
544 -BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
521 +TBA
545 545  
546 -(% class="box infomessage" %)
547 -(((
548 -**Note:** this error can be configured only under** "Service" account**.
549 -)))
550 -
551 -To change the parameters of the power fault error, select the "Protections → Power fault" section:
552 -
553 -[[image:1739284154410-676.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
554 -
555 -In this section:
556 -
557 -* Enable – a flag to enable the protection;
558 -* Delay before setting the error, millisecond;
559 -* Time to keep power off, millisecond;
560 -* Delay before clearing the error, millisecond;
561 -* Lock – a flag to block the error until the device is restarted.
562 -
563 -The “Power fault” occurs when the device detects a shortage or high power consumption in power supplies mentioned above. After that BMS turns off the corresponding power supply for "Time to keep power off", then it tries to enable power again.
564 -
565 -Error is removed when the power consumption is normal during “Delay before clearing the error” time.
566 -
567 -(% class="box warningmessage" %)
568 -(((
569 -If there is the "Power fault", the **“Critical error” **is generated.
570 -)))
571 -
572 572  === Charge contactor cycles ===
573 573  
574 574  The BMS Main 3 device protects the charging contactor against frequent switching.
... ... @@ -596,6 +596,11 @@
596 596  
597 597  * the “Delay before clearing the error” time has passed since the error was generated.
598 598  
550 +(% class="box infomessage" %)
551 +(((
552 +If there is the "CH contactor cycles error" error, the **charging **contactor opens.
553 +)))
554 +
599 599  === Discharge contactor cycles ===
600 600  
601 601  The BMS Main 3 device protects the discharging contactor against frequent switching.
... ... @@ -623,6 +623,11 @@
623 623  
624 624  * the “Delay before clearing the error” time has passed since the error was generated.
625 625  
582 +(% class="box infomessage" %)
583 +(((
584 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
585 +)))
586 +
626 626  === Temperature sensors ===
627 627  
628 628  The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
... ... @@ -642,7 +642,7 @@
642 642  
643 643  (% class="box warningmessage" %)
644 644  (((
645 -If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated.
606 +If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
646 646  )))
647 647  
648 648  === WDT reset ===
... ... @@ -665,7 +665,7 @@
665 665  
666 666  (% class="box warningmessage" %)
667 667  (((
668 -If there is the "WDT reset" error, the **“Critical error” **is generated.
629 +If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
669 669  )))
670 670  
671 671  === Unallowable charging ===
... ... @@ -693,6 +693,11 @@
693 693  
694 694  * the battery current is zero during the “Delay before clearing the error” time.
695 695  
657 +(% class="box infomessage" %)
658 +(((
659 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
660 +)))
661 +
696 696  === Stuck contactor ===
697 697  
698 698  The BMS Main 3 device protects contactors against sticking.
... ... @@ -716,7 +716,7 @@
716 716  
717 717  (% class="box warningmessage" %)
718 718  (((
719 -If there is the “Stuck contactor” error, the **“Critical error” **is generated.
685 +If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
720 720  )))
721 721  
722 722  === Contactor feedback ===
... ... @@ -740,7 +740,7 @@
740 740  
741 741  (% class="box warningmessage" %)
742 742  (((
743 -If there is the “Contactor feedback” error, the **“Critical error” **is generated.
709 +If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
744 744  )))
745 745  
746 746  === Insulation ===
... ... @@ -766,7 +766,7 @@
766 766  
767 767  (% class="box warningmessage" %)
768 768  (((
769 -If there is the “Insulation fault”, the **“Critical error”** is generated.
735 +If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
770 770  )))
771 771  
772 772  === HVIL ===
... ... @@ -786,19 +786,15 @@
786 786  * Source is ON: Upper current limit, A;
787 787  * Lock – a flag to block the error until the device is restarted.
788 788  
789 -If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated.
755 +If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated. Error clears if interlock loop is being restored.
790 790  
791 -Error clears if interlock loop is being restored.
792 -
793 793  (% class="box warningmessage" %)
794 794  (((
795 -If there is the “HVIL error”, the **“Critical error”** is generated.
759 +If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
796 796  )))
797 797  
798 798  === Critical error ===
799 799  
800 -Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
801 -
802 802  To change the critical error parameters, select the "Protections → Critical error" section:
803 803  
804 804  [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
... ... @@ -810,10 +810,38 @@
810 810  * Delay before clearing the error, second;
811 811  * Lock – a flag to block the error until the device is restarted.
812 812  
813 -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.
775 +The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
814 814  
815 -The “Critical error" signal is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
777 +* “Battery cover error”;
778 +* “Water”;
779 +* “Logic offline”;
780 +* “Cell count error”;
781 +* “ADC error”;
782 +* “Current sensor error”;
783 +* “Shunt offline”;
784 +* “Shunt error”;
785 +* “WDT reset”
786 +* “No temp. sensors”;
787 +* “Temperature sensor shorted”;
788 +* “Stuck contactor”;
789 +* “CH contactor feedback error”;
790 +* “DCH contactor feedback error”;
791 +* “Insulation fault”;
792 +* “PCH contactor feedback error”;
793 +* “CH/DCH contactor feedback error”;
794 +* “Main contactor feedback error”;
795 +* “High voltage fault”;
796 +* “Power switch error”;
797 +* “HVIL error”l
798 +* “Power fault”.
816 816  
800 +The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
801 +
802 +(% class="box infomessage" %)
803 +(((
804 +If there is the “Critical error”, **all **contactors open.
805 +)))
806 +
817 817  === General error ===
818 818  
819 819  To change the general error parameters, select the "Protections → Critical error" section:
... ... @@ -828,11 +828,11 @@
828 828  * Lock – a flag to block the error until the device is restarted;
829 829  * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
830 830  
831 -The “General error”is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
821 +The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
832 832  
833 833  The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
834 834  
835 835  (% class="box infomessage" %)
836 836  (((
837 -The state of the “General error” can be assigned to a discrete output or to a power switch.
827 +The state of the “General error” can be output to a discrete output or a power switch.
838 838  )))
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