My 72V China battery says it's fully charged but stops working after a few minutes usage.
I opened the pack and started measuring the small wires from the BMS connector to the battery. Here are the results:
connector 1-2: 0V
connector 2-3: 0V
connector 1-3: 7.2V
connector 3-4: 4.2V
connector 4-5: 4.2V
connector 5-6: 4.2V
.. and so on, all 4.2V all the way to the 20th connector.
Shouldn't the voltage between connector 1 and 2 and 2 and 3 also have been 4.2V? Connector 2 seems dead, there is no voltage reading from it even when measuring between the main negative output but I could be wrong, maybe it's supposed to be like this.
I have no idea, please help!
BTW: The 2. connector which is 0V goes into the BMS in case that matters.
I opened the pack and started measuring the small wires from the BMS connector to the battery. Here are the results:
connector 1-2: 0V
connector 2-3: 0V
connector 1-3: 7.2V
connector 3-4: 4.2V
connector 4-5: 4.2V
connector 5-6: 4.2V
.. and so on, all 4.2V all the way to the 20th connector.
Shouldn't the voltage between connector 1 and 2 and 2 and 3 also have been 4.2V? Connector 2 seems dead, there is no voltage reading from it even when measuring between the main negative output but I could be wrong, maybe it's supposed to be like this.
I have no idea, please help!
BTW: The 2. connector which is 0V goes into the BMS in case that matters.