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Take you to know the electric car battery

by:Vglory      2021-04-11
Teach you to know about electric vehicle batteries ●Battery classification Broadly speaking, batteries can be divided into chemical batteries, physical batteries and biological batteries. Chemical batteries and physical batteries have been widely used in the mass production of electric vehicles, and bio-batteries are considered to be one of the important development directions for electric vehicle batteries in the future. Considering the practical application, we will only analyze chemical batteries and physical batteries. If you are interested in bio-batteries, please refer to other materials. ■Chemical batteries Chemical batteries are the most widely used battery types in the field of electric vehicles, such as nickel-metal hydride batteries, lithium batteries, lithium polymer batteries, fuel power batteries, etc., all belong to this field. From the structural point of view, it can further divide batteries and fuel power batteries into two major categories. We now see that most electric vehicles are driven by battery technology, such as Toyota Prius (parameters | graph), Tesla MODELS ( Parameters|Figure) etc. Of course, the battery here is not what we call daily car batteries, but a general term for rechargeable batteries. Lead-acid batteries generally used in car batteries are only a sub-category. Because there are various electric car batteries, it is largely explained by the shopping mall now, rather than the circulation principle of the large space, how hard to practice the car does not help, let us form a universal variety of these batteries and basic Features and then several common batteries are now designated for storage. Commonly used chemical batteries for electric vehicles:-Lithium batteries Lithium batteries are one of the most commonly used battery types in electric vehicles. Although it was born in 1970, it is not a long time, but it occupies most of the electric vehicle battery market with its characteristics of high energy density and long cycle life. Now, the lithium batteries equipped in the sales of electric vehicles are mainly lithium iron phosphate batteries and ternary lithium batteries, and these two batteries have obvious differences in their respective characteristics, so we have to make detailed explanations and comparisons. Why are lithium iron phosphate batteries safe? Regarding electric vehicle batteries, most people may not have much knowledge. Therefore, we might as well give an example to help us understand. Recently, Tengshi, a new electric car brand funded by BYD and Daimler, will be launched, using lithium-iron phosphate batteries. Compared with the early days, the energy density of lithium manganate batteries and lithium iron phosphate batteries is not much different, about 100-110wh/kg, but its thermal stability is the best in automotive lithium batteries. Now, when the battery temperature 500-600℃ high temperature, its internal chemical composition is decomposed, which belongs to lithium battery. Lithium cobalt oxide battery is at 180-250℃, when the internal chemical composition is in unsafe conditions. In other words, lithium iron phosphate battery is one of the safest batteries among lithium batteries, which is why it has become one of the important categories of electric vehicle batteries. Why did Tesla choose the ternary lithium battery? Compared with the lithium iron phosphate battery, the ternary lithium battery used in Tesla MODELS has a higher energy density, about 200Wh/kg, which means a ternary lithium battery of the same weight Longer battery life than lithium iron phosphate batteries. Its shortcomings are also obvious. However, when the temperature is 250-350°C, the internal chemical substances begin to decompose. Therefore, a high-demand battery processing system is proposed, and a fuse separation device is added to the needs of each battery. In addition, because the volume of the monomer is very large Small, so the amount of bicycle battery cells is very large, models, for example, more than 7000 18650 ternary lithium batteries can meet the use of automotive equipment, which undoubtedly further increases the difficulty of the battery control system. Therefore, only Tesla currently uses ternary lithium batteries in the models it sells. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.
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