1, first check the primary and secondary circuit wiring is correct - mainly check fatal errors, such as weak current interface connected to strong electricity, should access DC signal access to AC signal, and short circuit problem.

2. To avoid the above reasons, disconnect all the circuit breakers and safety, switch on the AC power supply, test whether the AC double power switching device works normally, and whether the lower voltage of the double power switching device is normal.

3. After the AC part of the test is normal, close the AC switch of the charging module successively, observe whether the module starts normally, and measure the output voltage and polarity of the module.

4. After the charging module starts normally and the output voltage and polarity are correct, switch on the battery pack switch and each bus switch, measure whether the voltage and polarity of the lower port of the battery pack switch, the closing parent and the controlling parent are correct, and observe whether the direction of the voltmeter is overturned.

5. Switch on the feed-out switch once and measure whether the terminal voltage and voltage polarity corresponding to the feed-out switch are correct respectively.

Hot Tags: lithium ion batteries   lifepo4 cells  18650   lifepo4