What are the advantages and disadvantages of Ni-MH batteries?

Compared with nickel-chromium batteries, nickel-metal hydride batteries have the advantages of low recall effect, good environmental protection function, and long service life. The storage capacity is also about 30% higher than that of nickel-cadmium batteries. However, the cost of nickel-metal hydride batteries is much more expensive than nickel-cadmium batteries. Compared with lithium-ion batteries, the only advantage of nickel-metal hydride batteries is that they are relatively cheap, but in terms of functionality, they are far lower than lithium-ion batteries. As mentioned earlier, power lithium batteries have an important impact on the continued driving distance, cost, service life, and safety functions of new energy cars, especially the continued driving distance, which is the primary embodiment of the technical level of new energy cars. Said it is decided by the power lithium battery. The chaotic environment of new energy cars and the high requirements for power output have determined the need for higher voltage channels for power lithium batteries. The voltage of a nickel-hydrogen battery is only 1.2V, while the voltage of a lithium-ion battery can reach 3.7-4.2V. The voltage channel of lithium-ion batteries is higher. At present, the number of charging cycles in the life cycle of lithium-ion batteries can reach more than 1,000 times (ternary lithium-ion batteries), and lithium iron phosphate batteries can reach more than 2,000 times. The number of charging cycles of nickel-hydrogen batteries is only about 500 times, and the service life is much lower than that of lithium-ion batteries. Because of the vivid nature of lithium ion, the charging speed is faster. A lithium-ion battery can be fully charged in about 3 hours, while the charging speed of a nickel-metal hydride battery is much slower. In terms of energy density, lithium-ion batteries are even more dominant. Now, the energy density of lithium-ion batteries can reach 300Wh/kg, while the energy density of nickel-hydrogen batteries is as long as 140Wh/kg. If you use Ni-MH batteries as power lithium batteries, the driving distance of new energy cars will be very short. However, the characteristic of lower energy density makes the safety function of Ni-MH battery better than that of Li-ion battery. The self-discharge rate of Ni-MH batteries is much higher than that of Li-ion batteries, up to 25%-35% per month, while Li-ion batteries are only 2%-5%. Ni-MH battery has low energy density, short service life, and has the characteristics of memory effect, which is the fundamental reason why new energy car power lithium batteries have eliminated it. The basic reason for choosing a nickel-hydrogen battery as a power lithium battery for a gasoline-electric hybrid car that does not require high energy storage is the cost. However, as the cost of lithium-ion batteries has been declining year by year, Honda's hybrid electric cars have now given up using nickel-metal hydride batteries. At present, nickel-metal hydride batteries are basically used in emergency lights, remote controls, toys, etc., in areas where there is no special requirement for energy storage, and the amount of use is also decreasing year by year. 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: How to deal with used batteries in life?