A. the battery is unplugged from the car with the charger charging, charging can be, measuring the protection of the output voltage and the total battery voltage is equal, if equal, go to the resistance, increase the protection plate discharge overcurrent protection value.

B. B-wire is thick enough, can not be slender. b-wire slender is a over high current first section is prone to undervoltage protection.

C. connecting the two cores of the series line or nickel is thick enough, can not be long and thin. Thin and long, then a high current is prone to undervoltage protection.

D. B – line or C – line is playing screw connection, screw loose contact resistance becomes large, static output voltage is normal, but no output or low output voltage with load, and the screw connection position will be seriously heated.

E. poor cell consistency or part of the cell false welding, resulting in a string of low battery capacity; or a serious imbalance in the battery pack, one of the string voltage is much lower than the other sections, then a high current this string of battery voltage reduction is prone to undervoltage protection.

F. direct-drive motor power tool start current is relatively large, if the battery pack connected to the electronic load can be discharged, installed power tool a start on the power off then need to increase the protection board discharge overcurrent protection value or discharge overcurrent protection delay.

G. The electronic load can be discharged and the power will be cut off once the car is installed and started. It is possible that the battery assembly car instantly to the controller capacitor high current charging caused by the protection plate short circuit protection, general unplugged battery pack and then installed the car can be used normally. This problem is related to the internal resistance of the battery cell, the size of the controller capacitor and the capacitive load carrying capacity of the protection board, can be solved by increasing the capacitive load carrying capacity of the protection board.