Explain the difference between electric vehicle batteries and ordinary batteries

Explain the difference between electric vehicle batteries and ordinary batteries. Whenever I tell others that I plan to design a battery pack for electric vehicles, people ask me, what is a battery? What are the differences between batteries? What are the differences between car batteries and mobile phone batteries? Comparing an electric car to a team, the team’s work and journey require different settings and different talents. The battery pack is an indispensable member of the team. The battery is just an organ of a person, that is, the human heart. After all, the purpose of the battery pack is to provide a variety of protection and support for the battery, so that the battery has a longer life, and can cope with various extreme weather and environmental conditions. The biggest difference between a cover and a tray car battery and a mobile phone battery is that the car experience environment is very different from that of a mobile phone. During the operation, the car experienced various vibrations and the invasion of water, soil and sand from the external environment. Therefore, the housing and base of the battery pack are very important. The base of the existing electric vehicle battery pack is usually made of aluminum alloy or stainless steel, and the upper shell combined with the automobile chassis may be made of glass fiber composite material. The battery has undergone three-dimensional vibration and the equivalent of ten years of wind and rain (dust and water spray from different directions) to ensure that the battery is completely free of foreign substances. It is worth noting that the battery pack is connected to other parts of the car by wires. These wires should be connected to the center of the battery pack without leakage. Thermal management system users will also expect their electric vehicles to perform well in all weather conditions, 365 days a year. The car battery pack directly affects the acceleration and mileage of the car, which is very different from the performance of the mobile phone battery. The temperature processing system ensures that the temperature of each battery is stable throughout the year. Many batteries are used in extremely hot climates to ensure timely cooling and prevent the battery from weakening or bursting. Use the battery more in extremely cold climates to ensure that the internal satisfaction of the battery is warm and will not affect the function and life of the battery. The battery dissipates heat through the liquid coolant flowing at the bottom of the battery pack, and the coolant directly contacts the heat sink with excellent thermal conductivity and the single battery. Maybe direct air cooling, that is, a built-in fan. The heating of the battery is completed by the heater, which is powered by the battery itself. Therefore, the driving range of electric vehicles will be slightly reduced in winter. Another challenge is charging in polar environments. Because the car is turned off when charging, but the temperature processing system needs to know that the charging starts automatically and maintain the temperature of the internal battery pack, that is to say, the battery is still awake while the entire car is in a sleep state. There are many single cells in the cell balance battery pack, and they can be connected in series or in parallel. The cruising range of an electric vehicle directly depends on the worst-performing single battery, so the key is to stick to the voltage of each battery and the remaining power. The battery pack is called one of the VITM (voltage, current and temperature modules) equipment. The real-time measurement of voltage, current and temperature of each battery is guaranteed and arranged in a battery through the use of a series of resistors and transistors, together with an indicating temperature processing system, cooling Agent flow scheduling and temperature, battery cooling and warming. Power electronics (power electronics) In the strictest sense, power electronics products are not part of a battery pack, although some battery manufacturers classify it as a battery pack. Power electronic equipment includes chargers (charging modules), regenerative braking (regenerative) for inverters (manufacturing), and APM (auxiliary power modules) for automotive internal power supplies. A charger is a device that converts alternating current from the grid to direct current, and the battery can be used directly. However, with technological changes, more and more DC charging stations have gradually appeared in the world, and inverters from AC to DC are directly completed in the charging station, reducing the necessity of such components in the battery pack. However, in regenerative braking, the AC power from the generator still has to be converted into DC power for use by the battery. During the driving process of the car, the DC power of the battery is also converted into AC power that the motor can use, and an inverter is used in this process. 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: Introduce the safety requirements of static lithium battery energy storage system