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Changes for page 3.4 Protections

Last modified by Admin on 2025/10/14 10:27
From version 35.1
edited by Admin
on 2025/08/22 14:06
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To version 43.2
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 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 +
140 140  === Low temperature ===
141 141  
142 142  The BMS Main 3 device implements battery protection from too low temperature.
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375 375  If there is the "Cell count error", the **“Critical error” **is generated**.**
376 376  )))
377 377  
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 +
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:
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766 766  If there is the “HVIL error”, the **“Critical error”** is generated.
767 767  )))
768 768  
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 +
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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