Is the charger still working? How does the charger get hot?

Charger is one of the four core components of electric vehicle electrical system. The performance of electric vehicle charger is directly related to the charging effect, battery life and vehicle safety. When charging electric vehicle charger, voltage and current have strict requirements. Excessive or insufficient voltage and current will lead to charger damage. Recently, many users in the background have asked questions about electric vehicle chargers - "what should we do if the charger is hot?"? Can it be mixed? Does it still work when there's water in it? " Next, I'll answer your questions.

Why does the charger get hot? What is the harm of fever? The charger is in water accidentally. What should I do?


Rain or humid environment charging, may lead to charger water, this is a very dangerous thing. As a conversion power supply, there are AC circuit and DC circuit inside the charger. If the AC circuit part or the whole board gets water, it is easy to burn the circuit board and control components, and the human body will bring irreparable damage if it is close to the touch; if the DC circuit part gets water or damp, it will lead to the failure of electronic components, and if the charger is still working at this time, it will charge the battery. Therefore, when it is found that the charger has water, the power supply should be cut off immediately to ensure that the charger is completely dry without failure before use.

Charger heating is generally caused by uneven heat dissipation, the main reasons are as follows: 1. Charging in high temperature environment; 2. Charger lack of protection board; 3. Charger output voltage is too high or unstable; 4. Charging time is too long. If the charger is overheated for a long time, the components and wires are easy to be aged, and the lubrication failure of the fan will further aggravate the temperature rise and form a vicious circle. Light damage to the charger, battery damage, serious fire.

Can chargers be mixed?
Charging man specially emphasizes that it is strictly forbidden to mix chargers. Taking 48V and 60V chargers of lead-acid batteries as examples, the maximum voltage of 48V charger is about 59V, and the maximum voltage of 60V charger is about 74V. If you use a 48V charger to charge a 60V battery, the charger will not break down, but it can not be charged. After a short period of time, the charger will prompt full, but in fact, they are all virtual electricity, not used at all. On the contrary, if you use a 60V charger to charge a 48V battery, it will overcharge. The hazards of overcharge include: (1) lead to battery loss of water, shorten battery life; (2) increase the risk of battery expansion, resulting in potential safety hazards (overcharge does not necessarily lead to 100% battery expansion, but will basically lead to battery temperature rise, if frequent overcharge, the battery is likely to expand).

So what should we pay attention to when we use chargers everyday?

Part 1 / charging environment

Electric vehicle charging or parking in high temperature environment will not only damage the charger, but also the battery, causing great harm to the electric vehicle. At present, electric vehicle chargers are designed according to the ambient temperature of 25 ℃, so charging at 25 ℃ is better.

Part2 / charging time

In order to save trouble, many users will choose to charge electric vehicles at night, often a charge is a night, charger work for a long time, easy to heat damage, battery will often overcharge and drum. In order to protect the charger and battery and prolong its life, it is best to keep the charging time within 8-10 hours.

Part3 / avoid bumps

Many users in order to facilitate charging, electric car charger with the car, although this is convenient for themselves, but often bring some problems. Charger technology is simple, long-term vibration may lead to charger components fall off, virtual connection and other situations, causing serious damage to the charger. Therefore, it is generally not recommended to carry the charger with the vehicle. If it must be carried, it should be wrapped with a buffer and placed in the vehicle toolbox to avoid bumping and vibration of the charger.

Part4 / no covering

The heat dissipation of charger is helpful for charging safety and charger life. Therefore, do not use clothes, quilts and other items to cover when charging, which is easy to cause fire.

Part5 / avoid mixing


Electric vehicle users should not borrow other people's chargers or lend their own chargers to others. If they really need to borrow a charger, they must check whether their battery and charger models match, and whether the borrowed charger has reverse connection protection function. Mixed charger will not only damage the charger, but also lead to battery damage.