Determine the battery voltage or output voltage

That is to determine the electric vehicle battery voltage V or the output voltage of the original charger. There are two methods: one is to judge the voltage by looking at the original charger: the general battery voltage is 48V, and the corresponding output voltage of the original charger is about 59V; for a 60V battery, the corresponding original output voltage is 73.5v. The second way is to look at the battery to judge the voltage: generally, there are several batteries in the battery pack. The model is 6-dzm-12 / 20, indicating that each battery is 12V. So there are four batteries in an electric car. For 8-dzm-12 / 20 batteries, each battery is 16V, and the four batteries make up 64V.

Determine battery capacity or output current

Determine the battery capacity ah of the electric vehicle battery, or the output current of the original charger. A look at the original charger capacity: the output current of the original charger is 1.8A, indicating that the battery is 12Ah. Second, look at the battery to judge the voltage: generally, the battery in the battery box has a written model, for example, 6-dzm-12, 12 indicates 12Ah battery, 6-DZM-20, 20 indicates 20Ah battery. Third, according to the mileage of a charging run: Generally speaking, a 12Ah charger is more suitable for a full charge of 25-40km once a year or so. Running 45-60 km, 20Ah is more suitable.

Determine the positive and negative poles of the charger

Determine the shape of positive and negative electrodes suitable for electric vehicle charger interface. The common interfaces in the market are T-shaped, three vertical, medium horizontal and round. Some pin plugs may have different positive and negative poles. You can use a multimeter to measure the charging interface of the electric vehicle battery, find out the positive and negative poles. The output of the charger purchased is consistent with the charging socket. If the positive pole of the charger is reversed, the negative pole of the charger will damage the charger and battery.

Judge the quality of charger

A good electric vehicle charger adopts positive and negative pulse technology, which can effectively prevent, suppress and eliminate the vulcanization and polarization of battery. It can make the capacity of new battery keep stable for a long time, recover the capacity of old battery which has been polarized and reduced, and effectively extend the service life of battery by 2 ~ 3 times. It has the functions of intelligent timing protection, automatic temperature compensation, instantaneous impact protection of power grid, super moisture and corrosion resistance, etc.

Choose a brand

Generally speaking, there are four reasons for battery damage: water loss, vulcanization, imbalance and thermal runaway (charging drum). We must choose products with high brand reputation and good reputation. Many low-quality chargers in the market are prone to overcharge, under charge, loss of water and sulfurization, which is a great hidden danger to the personal and property safety of consumers. Large brand chargers are designed with many charging protection functions, which greatly increase the safety and efficiency of charging.