21700 battery

Why does the battery life of electric vehicle 21700 battery decrease?

1. The service life of 21700 battery is close to scrapping

In real life, some users scrap their batteries in less than three years. The main reason is that they use inferior batteries or use them improperly. This requires replacing inferior batteries, or forming good riding habits and charging methods. Some lithium-ion battery manufacturers use refurbished batteries or unqualified product batteries. They don't last long and are prone to safety accidents. Some users have not formed good charging habits, and they use chargers to charge until the electricity is used up, which seriously shortens the service life of electric vehicle 21700 battery.

2. The reason for the charger

Chargers have a very important use for electric vehicle 21700 battery, and unqualified chargers are flooding the market. Some businesses give unqualified products to customers for economic benefits. Chargers also have a service life, especially in high temperature environments, which are prone to accidents. Either the charging current is too small, or the charging voltage is not enough, or both of these reasons. The lithium-ion battery pack cannot be filled, and the electric car cannot run far if the capacity is not enough.

3. The reason of the electric car itself

Sometimes it rains and soaks the electric car, or the weather is humid, causing some lines to short-circuit. This seriously consumes the capacity of the electric car's lithium-ion battery pack. Pay special attention to the brakes of the electric car. Sometimes the brakes of the electric car do not return to their original position, so more power is consumed when riding. Another thing is that the power of the electric car's motor decreases.

4. Resistance problem

The capacity of the lithium-ion battery pack itself has not changed, but the resistance has increased. Compared with the resistance in summer and winter, the resistance has increased. To achieve the same power, the current output can only be increased. Therefore, when the capacity remains unchanged, the battery seems to be consumed very quickly.

5. Battery energy density and material

At present, the main materials are lithium iron phosphate batteries and ternary 21700 battery. The battery energy density determines the battery's charge. The ternary lithium-ion battery pack has a good energy density, but it is easy to explode under strong collisions. With development, the performance of ternary lithium-ion batteries has improved rapidly, and the improvement in cruising range is worth looking forward to.

Facts have proved that whether using the original charger to charge the lithium-ion battery pack of an electric vehicle or charging it at a smart charging station in the community, the battery life will decrease as the electric vehicle's usage cycle increases. The most effective way to increase battery life is to replace the lithium-ion battery pack of the electric vehicle.

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