How to detect a malfunction in the power tool protection board?
Guided reading
How to detect a malfunction in the power tool protection board?How to detect faults when the power tool protection board is working? We have provided the following methods: first, we take out the protective board and test the lithium battery protective board with testing equipment/directly test the protective board, which is fast, direct, and effective. Connect all wiring harnesses according to the wiring method of the protective board testing equipment B-、 Voltage acquisition line, P -, C -, etc. Set the parameters according to the specifications of the protective board before starting the test. The testing items include overcharging, overdi
How to detect a malfunction in the power tool protection board?
How to detect faults when the power tool protection board is working? We have provided the following methods: first, we take out the protective board and test the lithium battery protective board with testing equipment/directly test the protective board, which is fast, direct, and effective. Connect all wiring harnesses according to the wiring method of the protective board testing equipment B-、 Voltage acquisition line, P -, C -, etc. Set the parameters according to the specifications of the protective board before starting the test. The testing items include overcharging, overdischarging, internal resistance, overcurrent, short circuit, self consumption, etc. Based on the NG item of the test results, it can be determined whether the power tool protection board is damaged. Secondly, it is necessary to determine whether the battery pack was charged and discharged normally when passing through the protective plate, but was charged and discharged abnormally when passing through the protective plate, which indicates that the protective plate is damaged.
If the power tool protection board does not have overcurrent protection. Then we first check if the circuit of the overcurrent detection pin is abnormal, and if so, replace the protection IC. When there is no resistance or the resistance is too high on the power tool protection board, it is necessary to identify the cause from the identification circuit of the resistance pad, check and identify whether the resistance is soldered off, whether the resistance is attached incorrectly, and whether there is a short circuit or open circuit.
