How is the life of NiMH battery calibrated? NiMH battery life problem
(1) Avoid using the process of charging. Within the cycle life, the use process should not overcharge, because overcharge easily causes the positive and negative electrodes to swell, causing active material shedding and diaphragm damage, conductive network damage and battery ohmic polarization to become larger.
(2) Prevent deterioration of the electrolyte. During the cycle life of Ni-MH batteries, the hydrogen evolution of the battery should be suppressed.
(3) Storage of nickel-metal hydride batteries. Preserving the Ni-MH battery should be done after a sufficient amount of electricity. If the battery is stored for a long period of time without storing electrical energy in the battery, the function of the negative hydrogen storage alloy of the battery will be weakened and the battery life will be shortened.
(4) Charging after the battery is exhausted. Nickel-metal hydride batteries and nickel-cadmium batteries have the same "memory effect", that is, if the battery is repeatedly charged while the battery is still in the middle of the discharge, the battery will soon be unavailable.
It has been widely used in the early stage of the public, and can be repeated for about 500 times of charge and discharge, but after about 10 charge and discharge, it will produce a memory effect; another disadvantage is that during charge and discharge, the cathode will grow acicular crystals of cadmium. Sometimes it penetrates the separator and causes an internal dendritic short circuit. Due to the cadmium content, it must be recycled.
Nickel-metal hydride rechargeable battery Ni-MH (Nickel Metal Hyoride Battery)It is a mainstream rechargeable battery in the market, which uses nickel oxide as an anode and a metal alloy that absorbs hydrogen as a cathode, and generally can perform charging and discharging cycles of 500 times or more. Since it does not contain mercury and cadmium, it does not have to be recycled.
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