What are the key requirements for power lithium-ion batteries?

There are four main types of power lithium-ion batteries: nickel-metal hydride batteries, lead-acid batteries, nickel-cadmium batteries, and lithium batteries. Let’s take a look at some of the characteristics of various batteries: 1. Lead-acid batteries restrict the development of power sources due to their own performance. And there is lead pollution, gradually introduced to the market; 2. Nickel-cadmium batteries also have pot pollution, with serious memory benefits, and basically launched the power lithium-ion battery market; 3. Ni-MH batteries are an improvement of nickel-cadmium batteries, and the specific energy can reach 60- 80Wh/kg, and has the characteristics of fast charging speed, basically no memory effect, no environmental pollution, and high safety. At present, the processing technology of automobile power lithium-ion battery is basically mature. 4. At present, in the power lithium-ion battery industry, nickel-metal hydride batteries dominate, while lithium iron phosphate batteries are in the early stages of industrial development. 5. Better battery performance (especially safety) and mature manufacturing technology are nickel-hydrogen batteries, which currently dominate the world's general hybrid electric vehicle (HEV) batteries. 6. The current dominance of nickel-hydrogen power lithium-ion batteries is that the battery energy of existing hybrid vehicles is only 1 to 2kWh, which cannot be driven by pure electric or the battery life is less than 3km. In the longer term, Ni-MH cannot be used in PHEV and EV. The important reason is that the specific energy and energy density of Ni-MH cannot meet the requirements of PHEV and EV; the price of raw material Ni (OH) is higher, and the cost of manufacturing large-energy batteries will be higher; the development of nickel-hydrogen battery technology is basically mature, and the battery performance The room for improvement and cost reduction is very limited. 7. Compared with nickel-metal hydride batteries, the advantages of lithium batteries are important at present: specific energy and energy density are about twice that of nickel-metal hydride batteries, which can greatly improve the endurance of electric vehicles. Higher power, low self-discharge, and no memory Effect, these features can improve the convenience of using electric vehicles; the cost of raw materials is low; there is a lot of room for technological improvement and a lot of room for cost reduction. Ni-MH batteries are currently the most important choice for hybrid electric vehicle (HEV) batteries due to their mature technology and good safety, but it is difficult to meet the demand for higher electrification. Lithium batteries are the best choice for next-generation electric vehicle batteries. Around the year, it will replace nickel-metal hydride and become the mainstream of electric vehicle batteries. 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 causes the explosion of lithium batteries