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What is the difference between fast charging and slow charging on new energy vehicle lithium batteries?
The charging speed of an electric car is closely related to the power of the charger, the charging characteristics of the battery, and the temperature. Under the current battery technology level, even if it is fast charging, it takes 30 minutes to charge to 80% of the battery capacity. After more than 80%, in order to protect the battery safety, the charging current must be small, and charging for 100% of the time will be longer. In addition, when the temperature is low in winter, the battery requires a smaller charging current and the charging time becomes longer.
Electric car fast charge and slow charge: Why are there two charging modes?
We know that a car can have two charging interfaces, in fact, because there are two charging modes: constant voltage and constant current. Generally, constant current and constant voltage are used, so that the charging efficiency is relatively high. The reason why the fast charging is fast is due to the difference in charging voltage and current. The higher the current, the faster the charging. When it is almost full, use constant voltage to prevent overcharging of the battery and to protect the battery.
Electric car fast charge and slow charge: Why does fast charge still not replace slow charge?
The charging current and power of the slow charging are relatively small, the battery life is better, and the charging cost is low when the power is low. Fast charging uses large currents and power, which can have a large impact on the battery pack and can have an impact on life. Fast charging also requires supporting equipment, such as switching AC and DC power, so the cost will increase.
Fast charging and slow charging of electric vehicles: What should be paid attention to during winter maintenance of electric vehicles?
At present, most vehicles use lithium batteries. At lower temperatures, the performance of lithium batteries will decrease to varying degrees, as the charging current and discharge current become smaller, and the battery capacity decreases. In the case of cold, there may even be cases where there is no charge. In winter, the vehicle will use warm air, which will increase the power consumption of the vehicle and reduce the driving range of the vehicle.
When using an electric car in winter, it is normal for the charging time to become longer and the driving range of the vehicle to become shorter. In use, it should be charged immediately after the vehicle is stopped, and the battery can be used to make the charging faster. When planning the trip, it is necessary to fully consider the decline of the driving range of the winter vehicle.
The charging speed of an electric car is closely related to the power of the charger, the charging characteristics of the battery, and the temperature. Under the current battery technology level, even if it is fast charging, it takes 30 minutes to charge to 80% of the battery capacity. After more than 80%, in order to protect the battery safety, the charging current must be small, and charging for 100% of the time will be longer. In addition, when the temperature is low in winter, the battery requires a smaller charging current and the charging time becomes longer.