What are the battery types of electric vehicles?

What are the battery types of electric vehicles: Lead-acid batteries Lead-acid batteries are the most common batteries on weekdays. The important advantages are stable voltage and low price, but they also have problems such as low specific energy, short service life and frequent daily maintenance. . In China, lead-acid batteries are commonly used in domestic low-speed electric vehicles. In addition to the advantages mentioned above, the price of this battery is also lower than other batteries. Lead-acid batteries are available in 2V, 4V, 6V, 8V, 12V and 24V series, with capacities ranging from 200mAh to 3000mAh. Now let’s calculate the discharge time of lead-acid batteries. Here is a formula that can be used to roughly calculate: Rated capacity u0026times; discharge capacity ratio×〔1＋temperature coefficient×(ambient temperature-25)〕/discharge currentu003ddischarge time . Although lead-acid batteries are inexpensive, their battery life is relatively low. Therefore, it is not very suitable for electric vehicles to supply energy entirely from such batteries. What are the battery types for electric vehicles: Lithium iron manganese phosphate batteries Recently, BYD’s chairman Wang Chuanfu said that BYD’s latest researched lithium iron manganese phosphate batteries broke the energy density limit of traditional lithium iron phosphate batteries and reached the level of ternary materials. In terms of cost control, it is better than ordinary lithium iron phosphate, and it has been used in BYD electric vehicles, and its endurance has been greatly improved. This battery is used in BYD Qin’s electric car. This battery is an improved version of the lithium iron phosphate route, called lithium iron manganese phosphate, which is to add manganese to the material. The energy density of this battery has reached the density of ternary materials. The battery life is longer than the current lithium iron phosphate battery. Since no exact price information is currently available, it will not be compared for the time being. What are the battery types of electric vehicles: Lithium iron phosphate battery Lithium iron phosphate battery is a lithium-ion secondary battery, which is mainly used as a power lithium-ion battery, and its discharge efficiency is high, and the charge and discharge efficiency can reach 90% in the case of rate discharge Above, the lead-acid battery is about 80%. Among the batteries, the safety of lithium iron phosphate batteries is also higher than other batteries. The theoretical life span can reach 7 to 8 years, and the actual life span is about 3 to 5 years. The performance-price ratio is theoretically more than 4 times that of lead-acid batteries. . What are the battery types of electric vehicles: The lithium cobalt oxide battery TESLA electric vehicle uses the NCA series (nickel cobalt aluminum system) 18650 lithium cobalt oxide battery supplied by Panasonic, with a single battery capacity of 3100 mAh. TESLA adopts the battery pack strategy. The 85kWh MODELS battery unit uses a total of 8142 18650 lithium batteries. The engineers first distribute these batteries evenly by bricks and pieces one by one to form a whole battery pack, which is located on the underbody. Lithium cobalt oxide battery has stable structure, high capacity ratio, outstanding comprehensive performance, but its safety is poor and the cost is very high. It is mainly used for small and medium-sized batteries, with a nominal voltage of 3.7V. TESLA puts such a battery pack together, and safety has become a very important issue. The safety device in the battery pack by TESLA engineers is distributed to each 18650 lithium cobalt oxide battery, and each 18650 lithium cobalt oxide battery. There are fuses at both ends of the battery. When the battery is overheated or the current is too large, the fuse will be cut off, so as to warn that an abnormal condition (overheating or excessive current) of a battery will affect the entire battery pack. So, from this point of view, although the lithium cobalt oxide battery itself has defects, the safety in the packaging of TESLA's engineers is basically negligible. Obviously, this approach is still very suitable for the development of pure electric vehicles. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.