What is the difference between an electric vehicle battery pack and an ordinary battery

Whenever I tell others that I design a battery pack for an electric car, people ask me, what is a battery? What is the difference between a battery? What is the difference between a car battery and a mobile phone battery? If we compare an electric car to a team, the team is different Background, talents of different abilities come to run and move forward. The battery pack is an indispensable member of the team, and the battery is just an organ of this person, that is, his heart. The purpose of the battery pack is to provide a variety of protection and assistance 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 cover and tray car battery and mobile phone battery is that the environment of car experience is very different from that of mobile phone. Cars experience various vibrations during driving, as well as the intrusion of water, soil and sand from the external environment. Therefore, the casing and base of the battery pack are very important. Existing electric vehicle battery bases are usually made of aluminum alloy or stainless steel, and the upper shell combined with the vehicle chassis may be made of glass fiber composite materials. During the test, the battery will experience three-dimensional vibration and more than 10 years of wind and rain (dust and water spray from different directions) to ensure that the internal battery is completely free of any foreign matter, making it watertight. It is worth noting that the battery pack is connected to other parts of the car through wires, and the connection between these wires and the battery pack should also be waterproof. What is the difference between electric vehicle batteries and ordinary batteries? Thermal management system users also expect their electric vehicles to perform well in all weather conditions, 365 days a year. The car battery directly affects the acceleration and mileage of the car, which is very different from people's observation of the performance of the mobile phone battery. The temperature management system ensures that the temperature of each battery remains constant throughout the year. In extremely hot weather, a large number of batteries ensure timely cooling to prevent battery life or expansion and explosion. Use the battery in extremely cold weather to ensure that the inside of the battery is warm enough without affecting performance and life. The battery dissipates heat through the liquid coolant flowing at the bottom of the battery pack, and the coolant directly contacts the single battery through a cooling plate with good thermal conductivity. Or direct air cooling, 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 comes from charging in extreme environments. Because the car is shut down when charging, the temperature management system should automatically start when it knows about charging to maintain the internal temperature of the battery pack, which means that the battery pack is still awake when the entire car sleeps. What is the difference between an electric vehicle battery and an ordinary battery? There are many single cells in a cell balance battery pack. They can be connected in series or in parallel. The cruising range of an electric vehicle directly depends on which battery performs poorly, so it is important to maintain the voltage and remaining power of each battery. 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 the use of a single battery is adjusted through a series of resistors and transistors. It shows that the temperature management system can adjust the coolant at the same time. The flow rate and temperature, battery cooling and warming. Power electronics (power electronics) Technically, power electronics products are not part of the battery pack, but some battery manufacturers classify it as a battery pack. Power electronic equipment includes charger (charging module), regenerative braking (heat storage type) used by inverter (make), and auxiliary energy use inside APM (auxiliary power module). A charger is a device that converts alternating current from the grid to direct current, and the battery can be used directly. However, with the continuous innovation of technology, more and more DC charging stations have gradually appeared in the world. The inverters from AC to DC are directly completed in the charging station, reducing the number of such components in the battery pack. The necessity. However, in regenerative braking, the AC power from the generator still has to be converted into DC for use by the battery. 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 post: What is the difference between a power-type lithium-ion battery and an ordinary lithium-ion battery?