Lithium battery electric vehicle working principle and charging method analysis

The working principle of lithium-ion battery electric vehicles Lithium-ion battery electric bicycles refer to electric bicycles that use lithium-ion batteries as auxiliary energy sources. They are equipped with electric motors, controllers, batteries, handlebars and other operating components and display instrument systems. Personalized transportation. General lithium-ion battery electric vehicle charging is divided into three stages, constant current charging, constant voltage charging, and trickle charging. 1. Constant current charging is also called fast charging, which is to quickly charge the battery with high current, but it is impossible to fully charge the battery. When the power reaches a certain value, the battery cannot be quickly charged, otherwise the battery will be damaged. 2. After the constant current charging is completed, the constant voltage charging starts. Also called slow charging, it is a supplement to the virtual voltage left by fast charging. Make the battery reach the best stable state. 3. Trickle charge, which is a kind of maintenance of battery voltage after fully charged. Today's lithium-ion batteries in electric vehicles all have a built-in battery management system BMS, whose charge and discharge are controlled by software. The battery management system is important to prevent the battery from being over-discharged or over-charged, in order to extend the service life of the battery as much as possible. Lithium-ion battery electric vehicle charging method 1. Original original equipment, the unmatched current and voltage of the protection circuit during charging will cause damage to the circuit system, shorten the service life of lithium-ion battery electric vehicles, and even bring safety hazards. The original battery and charging A device is the best CP. 2. Moderate charging and discharging to prevent damage. Excessive charging and discharging will damage the lithium-ion battery to a great extent, so do not wait until the power is completely exhausted before charging, and do not charge for too long (avoid charging overnight), generally the green light on the charger Keep it for 1-2 hours after it is on. 3. When idle for a long time, charge the lithium-ion battery of an electric vehicle at the right time. When the lithium-ion battery is not used for a long time, you should prevent the lithium-ion battery from being in a state of loss for a long time, which will cause a significant reduction in service life. It can be charged once every two weeks or so. The storage state is about 40%~60%. 4. Pay attention to the charging method to prevent low temperature charging. Although the low temperature environment has little effect on the battery discharge performance, it will seriously affect the battery charging performance and greatly shorten the battery life. Try not to charge the lithium-ion battery of electric vehicles under low temperature conditions. The high temperature is the same. When the high temperature exceeds 30 ℃, the charging current should be increased. 5. Correctly grasp the charging time During the use process, you should prepare to grasp the charging time and frequency of the lithium-ion battery of the electric vehicle according to the actual situation, that is, the frequency and mileage of the electric vehicle you usually use. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the working principles of solar energy storage polymer lithium batteries?