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How to quickly judge whether EV Charger is good or bad?

2021-06-10

How to quickly judge whether EV Charger is good or bad?

 

Indicator inspection

1. Connect the power plug of the EV Charger to the 220VAC power supply, and the output terminal is not connected to the battery;

2. Check whether the green light (full or saturated) is on or flashing at this time;

3. If the green light is not on, it means that the EV Charger is abnormal. If only the green light is on, it means that the EV Charger is energized normally. Please proceed to the next test;

4. If the red and green lights are not on or flashing or are on at the same time, it means that the EV Charger is not normal. If only the green light is on, it means that the EV Charger is normally energized. Please proceed to the next step.

 

No-load output voltage inspection

1. Connect the power plug of the EV Charger to the 220VAC power supply, without connecting the battery;

2. Set the multimeter position to the DC voltage position (the multimeter must have a metering certificate);

3. Align the positive and negative poles of the output terminal of the EV Charger with two positive and negative meters;

4. Measure the no-load output voltage at this time. The no-load output voltage is normal in two situations: one is 54.5V±1V for 48V and 41.5±1V for 36V; if it is out of range and the deviation is large, the EV Charger can be judged. damage;

5. If the no-load voltage is normal, please perform the next highest output voltage check.

 

Check the highest output voltage

1. Connect the power plug of the EV Charger to the 220VAC power supply;

2. Connect the output terminal to a set of battery packs with the same nominal voltage as the EV Charger and with a capacity of 50%-80% and the same polarity;

3. Insert and unplug the EV Charger output plug twice, and observe whether the green light (full or saturated) and red light (charging or power supply) are switched on at this time. Normally, the red light (charging or power supply) is on when plugged in. The green light (full or saturated) is on when it is unplugged; if the two indicator lights cannot be switched alternately, it means that the EV Charger is faulty.