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Changes for page 3.4 Protections

Last modified by Admin on 2025/11/10 11:52
From version 43.2
edited by Admin
on 2025/10/14 10:24
Change comment: There is no comment for this version
To version 17.2
edited by Admin
on 2024/12/26 15:13
Change comment: There is no comment for this version

Summary

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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.
... ... @@ -43,6 +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) 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 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.
... ... @@ -54,13 +54,10 @@
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.
56 +* Threshold to switch from Region 1 to Region 2 – a current value at which
57 +*
63 63  
59 +
64 64  === Discharge current limit ===
65 65  
66 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.
... ... @@ -74,12 +74,7 @@
74 74  In this section:
75 75  
76 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.
73 +* Threshold to switch from Region 1 to Region 2
83 83  
84 84  === Undervoltage ===
85 85  
... ... @@ -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;
88 +* 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  
103 +(% class="box infomessage" %)
104 +(((
105 +If there is the "Undervoltage" error, the **discharging **contactor opens.
106 +)))
107 +
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;
121 +* 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.
... ... @@ -137,35 +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  
140 -=== Cell imbalance ===
136 +(% class="box infomessage" %)
137 +(((
138 +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).
139 +)))
141 141  
142 -The BMS Main 3 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.
143 -
144 -To change the battery protection parameters from cell imbalance, select the "Protections → Cell imbalance" section:
145 -
146 -[[image:1760437465709-702.png]]
147 -
148 -In this section:
149 -
150 -* Enable – a flag to enable the protection;
151 -* Minimum charge temperature, °C;
152 -* Tolerant charge temperature, °C;
153 -* Minimum discharge temperature, °C;
154 -* Tolerant discharge temperature, °C;
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 low temperature, the "Low temperature (CH)" and/or “Low temperature (DCH)” error are generated.
160 -
161 -Error generation conditions:
162 -
163 -* 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.
164 -
165 -Conditions for removing the error:
166 -
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 -
169 169  === Low temperature ===
170 170  
171 171  The BMS Main 3 device implements battery protection from too low temperature.
... ... @@ -195,6 +195,12 @@
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  
170 +(% class="box infomessage" %)
171 +(((
172 +If there is the "Low temperature (CH)" error, the **charging **contactor opens.
173 +If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
174 +)))
175 +
198 198  === High temperature ===
199 199  
200 200  The BMS Main 3 device implements battery protection from too high temperature.
... ... @@ -224,6 +224,12 @@
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  
205 +(% class="box infomessage" %)
206 +(((
207 +If there is the "High temperature (CH)" error, the **charging **contactor opens.
208 +If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
209 +)))
210 +
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**.**
236 +If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
253 253  )))
254 254  
255 255  === High humidity ===
... ... @@ -311,9 +311,9 @@
311 311  
312 312  * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
313 313  
314 -(% class="box warningmessage" %)
298 +(% class="box infomessage" %)
315 315  (((
316 -If there is the “Water” error, the **“Critical error”** is generated.
300 +If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
317 317  )))
318 318  
319 319  === Logic high temperature ===
... ... @@ -350,14 +350,11 @@
350 350  
351 351  To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
352 352  
353 -[[image:1755871522789-489.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
337 +[[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
354 354  
355 -
356 356  In this section:
357 357  
358 358  * Enable – a flag to enable the protection;
359 -* Delay before setting the error, second;
360 -* Delay before clearing the error, second;
361 361  * Lock – lock the error until the device is reset.
362 362  
363 363  As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
... ... @@ -372,7 +372,7 @@
372 372  
373 373  (% class="box warningmessage" %)
374 374  (((
375 -If there is the "Logic offline" error, the **“Critical error” **is generated**.**
356 +If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
376 376  )))
377 377  
378 378  === Cell count ===
... ... @@ -401,38 +401,9 @@
401 401  
402 402  (% class="box warningmessage" %)
403 403  (((
404 -If there is the "Cell count error", the **“Critical error” **is generated**.**
385 +If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
405 405  )))
406 406  
407 -=== Temperature sensor count ===
408 -
409 -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:
410 -
411 -[[image:1755871582533-550.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
412 -
413 -In this section:
414 -
415 -* Enable – a flag to enable the protection;
416 -* Number of cells – a number of temperature sensors connected to the BMS;
417 -* Delay before setting the error, millisecond;
418 -* Delay before clearing the error, second;
419 -* Lock – a flag to block the error until the device is restarted.
420 -
421 -As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
422 -
423 -Error generation conditions:
424 -
425 -* 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.
426 -
427 -Conditions for removing the error:
428 -
429 -* 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.
430 -
431 -(% class="box warningmessage" %)
432 -(((
433 -If there is the "T-sensor count error", the **“Critical error” **is generated**.**
434 -)))
435 -
436 436  === Logic count ===
437 437  
438 438  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:
... ... @@ -458,7 +458,7 @@
458 458  
459 459  (% class="box warningmessage" %)
460 460  (((
461 -If there is the "Logic count error", the **“Critical error”** is generated.
413 +If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
462 462  )))
463 463  
464 464  === Short circuit ===
... ... @@ -488,6 +488,11 @@
488 488  
489 489  * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
490 490  
443 +(% class="box infomessage" %)
444 +(((
445 +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).
446 +)))
447 +
491 491  === High contactor temperature ===
492 492  
493 493  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.
... ... @@ -516,6 +516,11 @@
516 516  
517 517  * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
518 518  
476 +(% class="box infomessage" %)
477 +(((
478 +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).
479 +)))
480 +
519 519  === Current sensor ===
520 520  
521 521  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.
... ... @@ -547,7 +547,7 @@
547 547  
548 548  (% class="box warningmessage" %)
549 549  (((
550 -If there is the “Current sensor error”, the **“Critical error” **is generated.
512 +If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
551 551  )))
552 552  
553 553  === Power switch ===
... ... @@ -565,39 +565,13 @@
565 565  
566 566  (% class="box warningmessage" %)
567 567  (((
568 -If there is the "Power switch error", the **“Critical error” **is generated.
530 +If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
569 569  )))
570 570  
571 571  === Power fault ===
572 572  
573 -BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
535 +TBA
574 574  
575 -(% class="box infomessage" %)
576 -(((
577 -**Note:** this error can be configured only under** "Service" account**.
578 -)))
579 -
580 -To change the parameters of the power fault error, select the "Protections → Power fault" section:
581 -
582 -[[image:1739284154410-676.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
583 -
584 -In this section:
585 -
586 -* Enable – a flag to enable the protection;
587 -* Delay before setting the error, millisecond;
588 -* Time to keep power off, millisecond;
589 -* Delay before clearing the error, millisecond;
590 -* Lock – a flag to block the error until the device is restarted.
591 -
592 -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.
593 -
594 -Error is removed when the power consumption is normal during “Delay before clearing the error” time.
595 -
596 -(% class="box warningmessage" %)
597 -(((
598 -If there is the "Power fault", the **“Critical error” **is generated.
599 -)))
600 -
601 601  === Charge contactor cycles ===
602 602  
603 603  The BMS Main 3 device protects the charging contactor against frequent switching.
... ... @@ -625,6 +625,11 @@
625 625  
626 626  * the “Delay before clearing the error” time has passed since the error was generated.
627 627  
564 +(% class="box infomessage" %)
565 +(((
566 +If there is the "CH contactor cycles error" error, the **charging **contactor opens.
567 +)))
568 +
628 628  === Discharge contactor cycles ===
629 629  
630 630  The BMS Main 3 device protects the discharging contactor against frequent switching.
... ... @@ -652,6 +652,11 @@
652 652  
653 653  * the “Delay before clearing the error” time has passed since the error was generated.
654 654  
596 +(% class="box infomessage" %)
597 +(((
598 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
599 +)))
600 +
655 655  === Temperature sensors ===
656 656  
657 657  The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
... ... @@ -671,7 +671,7 @@
671 671  
672 672  (% class="box warningmessage" %)
673 673  (((
674 -If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated.
620 +If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**
675 675  )))
676 676  
677 677  === WDT reset ===
... ... @@ -694,7 +694,7 @@
694 694  
695 695  (% class="box warningmessage" %)
696 696  (((
697 -If there is the "WDT reset" error, the **“Critical error” **is generated.
643 +If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
698 698  )))
699 699  
700 700  === Unallowable charging ===
... ... @@ -722,6 +722,11 @@
722 722  
723 723  * the battery current is zero during the “Delay before clearing the error” time.
724 724  
671 +(% class="box infomessage" %)
672 +(((
673 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
674 +)))
675 +
725 725  === Stuck contactor ===
726 726  
727 727  The BMS Main 3 device protects contactors against sticking.
... ... @@ -745,7 +745,7 @@
745 745  
746 746  (% class="box warningmessage" %)
747 747  (((
748 -If there is the “Stuck contactor” error, the **“Critical error” **is generated.
699 +If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
749 749  )))
750 750  
751 751  === Contactor feedback ===
... ... @@ -769,7 +769,7 @@
769 769  
770 770  (% class="box warningmessage" %)
771 771  (((
772 -If there is the “Contactor feedback” error, the **“Critical error” **is generated.
723 +If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
773 773  )))
774 774  
775 775  === Insulation ===
... ... @@ -795,7 +795,7 @@
795 795  
796 796  (% class="box warningmessage" %)
797 797  (((
798 -If there is the “Insulation fault”, the **“Critical error”** is generated.
749 +If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
799 799  )))
800 800  
801 801  === HVIL ===
... ... @@ -815,50 +815,15 @@
815 815  * Source is ON: Upper current limit, A;
816 816  * Lock – a flag to block the error until the device is restarted.
817 817  
818 -If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated.
769 +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.
819 819  
820 -Error clears if interlock loop is being restored.
821 -
822 822  (% class="box warningmessage" %)
823 823  (((
824 -If there is the “HVIL error”, the **“Critical error”** is generated.
773 +If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
825 825  )))
826 826  
827 -=== Battery voltage ===
828 -
829 -The BMS Main 3 allows to control the difference between sum of all cell voltages and voltage measured before the contactors.
830 -
831 -To change the voltage difference check parameters, select the "Protections → Battery voltage" section:
832 -
833 -[[image:1755871661259-633.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="100" width="800"]]
834 -
835 -In this section:
836 -
837 -* Enable – a flag to enable the protection;
838 -* Abnormal voltage difference – a maximum difference between sum of all cell voltages and voltage measured before the contactors (High voltage 1), V;
839 -* Delay before setting the error, second;
840 -* Delay before clearing the error, second;
841 -* Lock – a flag to block the error until the device is restarted.
842 -
843 -If there is a mismatch between voltages, "Battery voltage mismatch" error is generated.
844 -
845 -Error generation conditions:
846 -
847 -* difference between sum of all cell voltages and voltage measured before the contactors is **more **than "Abnormal voltage difference" value during "Delay before setting the error" time.
848 -
849 -Conditions for removing the error:
850 -
851 -* difference between sum of all cell voltages and voltage measured before the contactors is **less **than "Abnormal voltage difference" value during "Delay before clearing the error" time.
852 -
853 -(% class="box warningmessage" %)
854 -(((
855 -If there is the “Battery voltage mismatch” error, the **“Critical error”** is generated.
856 -)))
857 -
858 858  === Critical error ===
859 859  
860 -Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
861 -
862 862  To change the critical error parameters, select the "Protections → Critical error" section:
863 863  
864 864  [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
... ... @@ -870,10 +870,38 @@
870 870  * Delay before clearing the error, second;
871 871  * Lock – a flag to block the error until the device is restarted.
872 872  
873 -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.
789 +The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
874 874  
875 -The “Critical error" signal is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
791 +* “Battery cover error”;
792 +* “Water”;
793 +* “Logic offline”;
794 +* “Cell count error”;
795 +* “ADC error”;
796 +* “Current sensor error”;
797 +* “Shunt offline”;
798 +* “Shunt error”;
799 +* “WDT reset”
800 +* “No temp. sensors”;
801 +* “Temperature sensor shorted”;
802 +* “Stuck contactor”;
803 +* “CH contactor feedback error”;
804 +* “DCH contactor feedback error”;
805 +* “Insulation fault”;
806 +* “PCH contactor feedback error”;
807 +* “CH/DCH contactor feedback error”;
808 +* “Main contactor feedback error”;
809 +* “High voltage fault”;
810 +* “Power switch error”;
811 +* “HVIL error”l
812 +* “Power fault”.
876 876  
814 +The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
815 +
816 +(% class="box infomessage" %)
817 +(((
818 +If there is the “Critical error”, **all **contactors open.
819 +)))
820 +
877 877  === General error ===
878 878  
879 879  To change the general error parameters, select the "Protections → Critical error" section:
... ... @@ -888,11 +888,11 @@
888 888  * Lock – a flag to block the error until the device is restarted;
889 889  * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
890 890  
891 -The “General error”is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
835 +The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
892 892  
893 893  The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
894 894  
895 895  (% class="box infomessage" %)
896 896  (((
897 -The state of the “General error” can be assigned to a discrete output or to a power switch.
841 +The state of the “General error” can be output to a discrete output or a power switch.
898 898  )))
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