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Changes for page 3.4 Protections

Last modified by Admin on 2025/11/10 11:52
From version 44.1
edited by Admin
on 2025/10/14 10:27
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

Details

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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.
... ... @@ -137,31 +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||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="133" width="800"]]In this section:
147 -
148 -* Enable – a flag to enable the protection;
149 -* Maximum cell imbalance, V;
150 -* Tolerant cell imbalance, V;
151 -* Delay before setting the error, millisecond;
152 -* Delay before clearing the error, second;
153 -* Lock – a flag to block the error until the device is restarted.
154 -
155 -As a result of the operation of the battery protection from cell imbalance, the "Cell imbalance” error is generated.
156 -
157 -Error generation conditions:
158 -
159 -* 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.
160 -
161 -Conditions for removing the error:
162 -
163 -* 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.
164 -
165 165  === Low temperature ===
166 166  
167 167  The BMS Main 3 device implements battery protection from too low temperature.
... ... @@ -191,6 +191,12 @@
191 191  
192 192  * 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.
193 193  
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 +
194 194  === High temperature ===
195 195  
196 196  The BMS Main 3 device implements battery protection from too high temperature.
... ... @@ -220,6 +220,12 @@
220 220  
221 221  * 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.
222 222  
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 +
223 223  === Battery cover ===
224 224  
225 225  To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
... ... @@ -245,7 +245,7 @@
245 245  
246 246  (% class="box warningmessage" %)
247 247  (((
248 -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.**
249 249  )))
250 250  
251 251  === High humidity ===
... ... @@ -307,9 +307,9 @@
307 307  
308 308  * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
309 309  
310 -(% class="box warningmessage" %)
298 +(% class="box infomessage" %)
311 311  (((
312 -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**.
313 313  )))
314 314  
315 315  === Logic high temperature ===
... ... @@ -346,14 +346,11 @@
346 346  
347 347  To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
348 348  
349 -[[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"]]
350 350  
351 -
352 352  In this section:
353 353  
354 354  * Enable – a flag to enable the protection;
355 -* Delay before setting the error, second;
356 -* Delay before clearing the error, second;
357 357  * Lock – lock the error until the device is reset.
358 358  
359 359  As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
... ... @@ -368,7 +368,7 @@
368 368  
369 369  (% class="box warningmessage" %)
370 370  (((
371 -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.**
372 372  )))
373 373  
374 374  === Cell count ===
... ... @@ -397,38 +397,9 @@
397 397  
398 398  (% class="box warningmessage" %)
399 399  (((
400 -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.**
401 401  )))
402 402  
403 -=== Temperature sensor count ===
404 -
405 -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:
406 -
407 -[[image:1755871582533-550.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
408 -
409 -In this section:
410 -
411 -* Enable – a flag to enable the protection;
412 -* Number of cells – a number of temperature sensors connected to the BMS;
413 -* Delay before setting the error, millisecond;
414 -* Delay before clearing the error, second;
415 -* Lock – a flag to block the error until the device is restarted.
416 -
417 -As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
418 -
419 -Error generation conditions:
420 -
421 -* 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.
422 -
423 -Conditions for removing the error:
424 -
425 -* 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.
426 -
427 -(% class="box warningmessage" %)
428 -(((
429 -If there is the "T-sensor count error", the **“Critical error” **is generated**.**
430 -)))
431 -
432 432  === Logic count ===
433 433  
434 434  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:
... ... @@ -454,7 +454,7 @@
454 454  
455 455  (% class="box warningmessage" %)
456 456  (((
457 -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.**
458 458  )))
459 459  
460 460  === Short circuit ===
... ... @@ -484,6 +484,11 @@
484 484  
485 485  * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
486 486  
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 +
487 487  === High contactor temperature ===
488 488  
489 489  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.
... ... @@ -512,6 +512,11 @@
512 512  
513 513  * the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
514 514  
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 +
515 515  === Current sensor ===
516 516  
517 517  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.
... ... @@ -543,7 +543,7 @@
543 543  
544 544  (% class="box warningmessage" %)
545 545  (((
546 -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.**
547 547  )))
548 548  
549 549  === Power switch ===
... ... @@ -561,39 +561,13 @@
561 561  
562 562  (% class="box warningmessage" %)
563 563  (((
564 -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.**
565 565  )))
566 566  
567 567  === Power fault ===
568 568  
569 -BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
535 +TBA
570 570  
571 -(% class="box infomessage" %)
572 -(((
573 -**Note:** this error can be configured only under** "Service" account**.
574 -)))
575 -
576 -To change the parameters of the power fault error, select the "Protections → Power fault" section:
577 -
578 -[[image:1739284154410-676.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
579 -
580 -In this section:
581 -
582 -* Enable – a flag to enable the protection;
583 -* Delay before setting the error, millisecond;
584 -* Time to keep power off, millisecond;
585 -* Delay before clearing the error, millisecond;
586 -* Lock – a flag to block the error until the device is restarted.
587 -
588 -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.
589 -
590 -Error is removed when the power consumption is normal during “Delay before clearing the error” time.
591 -
592 -(% class="box warningmessage" %)
593 -(((
594 -If there is the "Power fault", the **“Critical error” **is generated.
595 -)))
596 -
597 597  === Charge contactor cycles ===
598 598  
599 599  The BMS Main 3 device protects the charging contactor against frequent switching.
... ... @@ -621,6 +621,11 @@
621 621  
622 622  * the “Delay before clearing the error” time has passed since the error was generated.
623 623  
564 +(% class="box infomessage" %)
565 +(((
566 +If there is the "CH contactor cycles error" error, the **charging **contactor opens.
567 +)))
568 +
624 624  === Discharge contactor cycles ===
625 625  
626 626  The BMS Main 3 device protects the discharging contactor against frequent switching.
... ... @@ -648,6 +648,11 @@
648 648  
649 649  * the “Delay before clearing the error” time has passed since the error was generated.
650 650  
596 +(% class="box infomessage" %)
597 +(((
598 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
599 +)))
600 +
651 651  === Temperature sensors ===
652 652  
653 653  The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
... ... @@ -667,7 +667,7 @@
667 667  
668 668  (% class="box warningmessage" %)
669 669  (((
670 -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.**
671 671  )))
672 672  
673 673  === WDT reset ===
... ... @@ -690,7 +690,7 @@
690 690  
691 691  (% class="box warningmessage" %)
692 692  (((
693 -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.**
694 694  )))
695 695  
696 696  === Unallowable charging ===
... ... @@ -718,6 +718,11 @@
718 718  
719 719  * the battery current is zero during the “Delay before clearing the error” time.
720 720  
671 +(% class="box infomessage" %)
672 +(((
673 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
674 +)))
675 +
721 721  === Stuck contactor ===
722 722  
723 723  The BMS Main 3 device protects contactors against sticking.
... ... @@ -741,7 +741,7 @@
741 741  
742 742  (% class="box warningmessage" %)
743 743  (((
744 -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.**
745 745  )))
746 746  
747 747  === Contactor feedback ===
... ... @@ -765,7 +765,7 @@
765 765  
766 766  (% class="box warningmessage" %)
767 767  (((
768 -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.**
769 769  )))
770 770  
771 771  === Insulation ===
... ... @@ -791,7 +791,7 @@
791 791  
792 792  (% class="box warningmessage" %)
793 793  (((
794 -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.**
795 795  )))
796 796  
797 797  === HVIL ===
... ... @@ -811,50 +811,15 @@
811 811  * Source is ON: Upper current limit, A;
812 812  * Lock – a flag to block the error until the device is restarted.
813 813  
814 -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.
815 815  
816 -Error clears if interlock loop is being restored.
817 -
818 818  (% class="box warningmessage" %)
819 819  (((
820 -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.**
821 821  )))
822 822  
823 -=== Battery voltage ===
824 -
825 -The BMS Main 3 allows to control the difference between sum of all cell voltages and voltage measured before the contactors.
826 -
827 -To change the voltage difference check parameters, select the "Protections → Battery voltage" section:
828 -
829 -[[image:1755871661259-633.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="100" width="800"]]
830 -
831 -In this section:
832 -
833 -* Enable – a flag to enable the protection;
834 -* Abnormal voltage difference – a maximum difference between sum of all cell voltages and voltage measured before the contactors (High voltage 1), V;
835 -* Delay before setting the error, second;
836 -* Delay before clearing the error, second;
837 -* Lock – a flag to block the error until the device is restarted.
838 -
839 -If there is a mismatch between voltages, "Battery voltage mismatch" error is generated.
840 -
841 -Error generation conditions:
842 -
843 -* 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.
844 -
845 -Conditions for removing the error:
846 -
847 -* 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.
848 -
849 -(% class="box warningmessage" %)
850 -(((
851 -If there is the “Battery voltage mismatch” error, the **“Critical error”** is generated.
852 -)))
853 -
854 854  === Critical error ===
855 855  
856 -Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
857 -
858 858  To change the critical error parameters, select the "Protections → Critical error" section:
859 859  
860 860  [[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
... ... @@ -866,10 +866,38 @@
866 866  * Delay before clearing the error, second;
867 867  * Lock – a flag to block the error until the device is restarted.
868 868  
869 -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:
870 870  
871 -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”.
872 872  
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 +
873 873  === General error ===
874 874  
875 875  To change the general error parameters, select the "Protections → Critical error" section:
... ... @@ -884,11 +884,11 @@
884 884  * Lock – a flag to block the error until the device is restarted;
885 885  * Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
886 886  
887 -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.
888 888  
889 889  The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
890 890  
891 891  (% class="box infomessage" %)
892 892  (((
893 -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.
894 894  )))
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