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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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CR1130 battery.Why NiMH batteries are not adopted by new energy vehicles

release time:2023-10-19 Hits:     Popular:AG11 battery

  

  The power battery is one of the most core components of new energy vehicles. It not only affects the driving range of new energy vehicles through energy storage capacity, but also determines the service life of the vehicle through cost, and even has a profound impact on the safety and acceleration performance of the vehicle. It can be said that the quality of power batteries is of great significance for the development of new energy vehicles.

  The basic function of a power battery is to store energy. In the battery market, in addition to well-known lead-acid batteries and lithium-ion batteries, there are also nickel cadmium batteries, nickel hydrogen batteries, etc. Among them, nickel hydrogen batteries are favored by Toyota and Honda for energy storage in gasoline electric hybrid vehicles, while new energy vehicles choose lithium-ion batteries as power batteries.

  Compared with nickel chromium batteries, nickel hydrogen batteries have advantages such as low memory effect, good environmental performance, and long service life. Their storage capacity is also about 30% higher than nickel cadmium batteries. However, the cost of nickel hydrogen batteries is much more expensive than nickel cadmium batteries.

  Compared to lithium-ion batteries, the only advantage of nickel hydrogen batteries is that they are relatively inexpensive, but their performance is far lower than that of lithium-ion batteries.

  As mentioned earlier, power batteries have a significant impact on the range, cost, service life, safety performance, and other aspects of new energy vehicles. Especially, as the main manifestation of the technological level of new energy vehicles, the range is fundamentally determined by power batteries.

  The complex driving environment of new energy vehicles and the high requirements for power output determine that power batteries require a higher voltage platform. The voltage of nickel hydrogen batteries is only 1.2V, while the voltage of lithium-ion batteries can reach 3.7-4.2V. The voltage platform of lithium-ion batteries is higher.

  At present, the number of charging cycles for lithium-ion batteries within their life cycle can reach over 1000 (ternary lithium batteries), and lithium iron phosphate batteries can also reach over 2000 times. The charging cycle of nickel hydrogen batteries is only about 500 times, and their service life is much lower than that of lithium-ion batteries.


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