What are the battery types for new energy vehicles?

Lithium battery is currently one of the most commonly used battery types in electric vehicles. Although it has not been a long time since its birth in 1970, it quickly occupied the largest market of electric vehicle batteries due to its high energy density and long cycle life. Part of the country. Nowadays, the lithium batteries equipped with electric vehicles on sale mainly include lithium iron phosphate batteries and ternary lithium batteries, and these two batteries have significant differences in their own characteristics, so it is necessary for us to explain and explain them in detail. Compare. (1) Compared with the earlier lithium manganese oxide batteries, the lithium iron phosphate battery does not have much difference in energy density, about 100-110Wh/kg, but its thermal stability is the same as the current lithium manganese battery. The best of the batteries, when the battery temperature is at 500-600℃, the internal chemical composition starts to be analyzed, and the lithium cobalt oxide battery, which is also a lithium battery, has an unstable internal chemical composition at 180-250℃ . In other words, the safety of lithium iron phosphate batteries is second to none in lithium batteries, and because of this, it has also become one of the most important categories of electric vehicle batteries. (2) Compared with lithium iron phosphate batteries, the ternary lithium battery used in Tesla MODELS has a much higher weight energy density, which is about 200Wh/kg, which means that the same weight of lithium battery is about 200Wh/kg. Yuan lithium batteries have a longer range than lithium iron phosphate batteries. However, its shortcomings are also obvious. When its own temperature is 250-350℃, the internal chemical composition begins to be analyzed. Therefore, extremely high requirements are placed on the battery management system. It is necessary to install a safety device for each battery. In addition, , Due to the small size of the cell, the number of battery cells required for a bicycle is very large. What are the battery types of new energy vehicles: Ni-MH batteries What are the battery types of new energy vehicles: Ni-MH batteries Ni-MH batteries are currently another mainstream electric vehicle power lithium-ion battery type besides lithium batteries, which have gradually developed after the 1990s In recent years, many hybrid vehicles such as Toyota Prius use such batteries as energy storage components. Its energy density is not much different from the general lithium battery, about 70-100Wh/kg, but because the battery cell voltage is only 1.2V, which is 1/3 of the lithium battery, so under the condition of a certain demand voltage, its The volume of the battery pack is larger than that of the lithium battery. Like lithium batteries, nickel-metal hydride batteries also need a battery management system, but they pay more attention to battery charge and discharge management. The reason for this difference is mainly due to the memory effect of nickel-metal hydride batteries, that is, the capacity of the battery will attenuate during the cycle of charging and discharging, and overcharging or discharging may aggravate the capacity loss of the battery (this characteristic of lithium batteries Almost negligible). Therefore, as far as manufacturers are concerned, the Ni-MH battery control system will actively guard against overcharge and discharge in settings, such as artificially controlling the battery charge and discharge interval within a certain percentage of the total capacity to reduce the rate of capacity decay. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Lithium battery charge and discharge process and considerations