Do you know what the biggest killer of electric car chargers is?

1. Appearance composition

The rechargeable battery is generally made into a plastic box, which can be divided into: power input line (220V power plug), box body, charging indicator light, power output line (connected to electric vehicle battery ) and model specification label. The charging indicator is generally in two colors: red in the positive charging and green in the full indicator. In the model specification label, special attention should be paid to adapting the battery. The voltage and current must be compared. If the voltage mismatch is too high and the current mismatch is too large, the battery will be damaged to avoid unnecessary economic loss.

The circuit of the charger is also divided into three parts according to the working principle: the voltage regulating part, the rectifying part and the charging control part. The voltage regulation part is to reduce the high voltage of 220V to the charging voltage required by the battery. For example, the voltage of the 48V charger needs to be adjusted to about 60V, which is generally completed by the transformer; the rectification part, everyone knows that the household 220V is AC, and the battery is For direct current, if you want to charge the battery, you need to adjust the current to direct current, which is usually completed by the rectifier bridge circuit. The charging adjustment part is the technical core of the charger. It bears the self-feedback adjustment of the charger at each stage, and the common fault control on the market. The device is generally a fault that causes the battery to be damaged due to this partial failure.

2. Internal structure? Everyone knows, transformers, capacitors, power tubes, resistors, these components will burn black as long as they burn out, if you are broken, you can repair it yourself.

3. Common specifications

The specifications of the electric vehicle charger must be matched with the battery. The specific matching method is shown in the table below. In addition, the common price in the market is also included:

4. How to use

A. The charging voltage, charging current, positive and negative polarity of the charger should be consistent with the required parameters of the rechargeable battery;

B. When charging, plug in the battery first, then plug in the AC power plug. After charging is completed, unplug the AC power cord and then unplug the battery.

C. When charging normally, the charging indicator will be red. When the battery is fully charged, the charging indicator will be green. When no load is present, the charging indication shows green;

D. Charger use environment 0 ° C ~ 40 ° C (limited indoors);

E. The battery will not be used for a long time, and the battery will be recharged every 30 days or so;

F. There is high voltage inside the charger, it is forbidden to disassemble by itself; do not touch the power plug with wet hands, and should not be used in the environment of humid, flammable and explosive gas;

G. When the charger is working, it will generate a certain amount of heat. Please pay attention to ventilation. Do not cover the charger with foreign objects; do not carry it with the car to avoid damage. Do not charge non-rechargeable batteries;

H. If there is any abnormality such as smoke or burnt smell during the use of the charger, the power should be cut off immediately. If the charger fails, it must not be repaired without authorization and must be returned to the manufacturer for repair;

I. The charger with built-in fan cooling method will have a certain noise during operation (that is, the sound of airflow generated when the blade rotates), which is a normal phenomenon.

5. Common faults

A. The indicator light always shows green when charging. The reason may be: the charger is not connected to the battery end, the charger output line is disconnected, the internal connection of the battery box is broken, the battery box fuse is burnt out, the battery itself is damaged, and the charger is red. Damage or malfunction of the pipe;

B. The red light cannot be turned green when charging. The reason may be: the battery is damaged by a single block, the battery is too low, the battery is too hot, the battery is too hot, the battery is too hot, the battery is too large, and the charger is damaged.

C. The indicator light does not illuminate because the charger is damaged or the indicator light is damaged.

D. The fan is abnormal or not rotating due to fan damage or circuit failure.

In short, the charger as a functional accessory component of the electric vehicle, the damage rate is higher than other parts, in addition to the product itself, "vibration damage" and "rain water into the water" are the two biggest killers of the charger, in Under the premise of improving the quality of products, users must also avoid the above problems; even if the merchants give three bags of replacement within one year, it is a waste of time and waste of social resources, which is not willing to happen.