Why the li ion battery charger does not turn on the light after the battery is fully charged?

Recently a friend shared that he encountered a strange problem. The electric bike is fully charged, the li ion battery charger does not turn on the green light, but it turns green after plugging and unplugging. He is very puzzled.

We should know, an universal lithium ion battery charger does not turn green is usually caused by a lack of battery fluid.

The charger turns the light because the circuit current has a trigger point higher than the conversion current when the charger is working. When the battery is short of liquid, the current in the circuit has been stagnant before the switching point, so the charger has not turned the light.

Let's take a 48V 12Ah charger as an example, its conversion current is 0.38-0.43A, and its trigger current is generally 0.50A. The current of the charger that has the problem of not turning the light is close to 0.38-0.43A. After re-plugging the charger, the light is turned on only on the surface, and the line current is still less than 0.50A, which cannot reach the trigger point, and the charger cannot work normally.

If we encounter such a situation, what should we do?

 1. Replace the li ion battery charger which matches the battery parameters.

 The design of the electric vehicle is integral, and the parameters of the charger are consistent with the battery of the electric vehicle. Therefore, when the electric vehicle is fully charged but the charger does not turn the green light, the charger with the matching parameters can be replaced.

2. Charge in an environment with good ventilation and suitable temperature.

Taking lead-acid batteries as an example, the most suitable temperature for charging is 25 degrees, which should not be too high or too low, and try to charge electric vehicles in a well-ventilated and manned environment.

3. Choose high-quality batteries and smart lithium battery charger.

The quality of the smart li ion battery charger will also affect the use of the battery. A good li ion battery charger not only has excellent product quality, but its after-sales service is also trustworthy.