Batterypack BMS problems


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Jul 31, 2019
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Im having problems with a batterypack i have build. The batterypack is a 20s (72v) 18650cells.

The problem is when is use it on my project, the voltage Will drop Real low (But only from the bms) the voltage directly from the batterypack is still High. The voltage from the bms rises again and matches the pack. (Without charging)

Anyone Got any idea What the problem might be ?
 
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