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Classification of Ni-MH batteries

Nickel-hydrogen rechargeable batteries are divided into high-voltage nickel-hydrogen batteries and low-voltage nickel-hydrogen batteries.
Low-voltage nickel-hydrogen batteries have the following characteristics: (1) battery voltage is 1.2-1.3V, which is equivalent to that of nickel-cadmium batteries; (2) high energy density, which is more than 1.5 times that of nickel-cadmium batteries; (3) fast charging and discharging, good low-temperature performance; (4) sealed, strong overcharging and discharging resistance; (5) dendrite-free crystal formation, which can prevent batteries. Internal short circuit; (6) Safety and reliability, no pollution to the environment, no memory effect, etc. [1]
High voltage nickel-hydrogen batteries have the following characteristics: (1) high reliability. It has good over-discharge and over-charge protection, can withstand high charge-discharge rate and no dendrite formation. It has good bit-rate characteristics. Its mass specific capacity is 60A. h/kg, which is five times as much as that of nickel-cadmium batteries. (2) Long cycle life, up to thousands of times. (3) Fully sealed, less maintenance. (4) The low temperature performance is excellent, and the capacity does not change significantly at - 10 C.

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