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Changes for page 3.4 Protections

Last modified by Admin on 2025/10/14 10:27
From version 34.1
edited by Admin
on 2025/08/22 14:05
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To version 43.1
edited by Admin
on 2025/10/14 10:24
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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 ===
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
143 +
144 +To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
145 +
140 140  === Low temperature ===
141 141  
142 142  The BMS Main 3 device implements battery protection from too low temperature.
... ... @@ -375,6 +375,35 @@
375 375  If there is the "Cell count error", the **“Critical error” **is generated**.**
376 376  )))
377 377  
384 +=== Temperature sensor count ===
385 +
386 +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:
387 +
388 +[[image:1755871582533-550.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
389 +
390 +In this section:
391 +
392 +* Enable – a flag to enable the protection;
393 +* Number of cells – a number of temperature sensors connected to the BMS;
394 +* Delay before setting the error, millisecond;
395 +* Delay before clearing the error, second;
396 +* Lock – a flag to block the error until the device is restarted.
397 +
398 +As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
399 +
400 +Error generation conditions:
401 +
402 +* 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.
403 +
404 +Conditions for removing the error:
405 +
406 +* 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.
407 +
408 +(% class="box warningmessage" %)
409 +(((
410 +If there is the "T-sensor count error", the **“Critical error” **is generated**.**
411 +)))
412 +
378 378  === Logic count ===
379 379  
380 380  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:
... ... @@ -766,6 +766,37 @@
766 766  If there is the “HVIL error”, the **“Critical error”** is generated.
767 767  )))
768 768  
804 +=== Battery voltage ===
805 +
806 +The BMS Main 3 allows to control the difference between sum of all cell voltages and voltage measured before the contactors.
807 +
808 +To change the voltage difference check parameters, select the "Protections → Battery voltage" section:
809 +
810 +[[image:1755871661259-633.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="100" width="800"]]
811 +
812 +In this section:
813 +
814 +* Enable – a flag to enable the protection;
815 +* Abnormal voltage difference – a maximum difference between sum of all cell voltages and voltage measured before the contactors (High voltage 1), V;
816 +* Delay before setting the error, second;
817 +* Delay before clearing the error, second;
818 +* Lock – a flag to block the error until the device is restarted.
819 +
820 +If there is a mismatch between voltages, "Battery voltage mismatch" error is generated.
821 +
822 +Error generation conditions:
823 +
824 +* 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.
825 +
826 +Conditions for removing the error:
827 +
828 +* 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.
829 +
830 +(% class="box warningmessage" %)
831 +(((
832 +If there is the “Battery voltage mismatch” error, the **“Critical error”** is generated.
833 +)))
834 +
769 769  === Critical error ===
770 770  
771 771  Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
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