Nickel-metal hydride storage battery

Abstract

A nickel-metal hydride storage battery comprises a shell, an electrode and electrolyte, the electrode comprises a positive electrode plate, a negative electrode plate and a diaphragm, the electrode is completely immersed in the electrolyte, materials of the positive electrode plate comprise a positive active material, a positive conductive agent, a positive additive and a positive adhesive, the positive active material comprises nickel hydroxide, the positive conductive agent comprises cobalt or nickel, the positive electrode additive comprises calcium hydroxide or zinc oxide, the positive electrode plate adhesive comprises carboxymethyl cellulose or polytetrafluoroethylene, the negative electrode plate is prepared from hydrogen storage alloy powder, a negative electrode conductive agent, a negative electrode additive and a negative electrode adhesive, the negative electrode conductive agent comprises conductive carbon or nickel powder, the negative electrode additive comprises zinc oxide or aluminum oxide, the negative electrode adhesive comprises hydroxypropyl methyl cellulose and butadiene styrene rubber, lining plates are arranged on the outer sides of the positive electrode plate and the negative electrode plate respectively, the lining plates are made of elastic materials, and a plurality of through holes are further formed in the lining plates. The invention provides a novel nickel-metal hydride storage battery which is safe, reliable, environment-friendly, pollution-free, long in service life, good in wide-temperature performance and large in capacity ratio.

Description

technical field [0001] The invention belongs to the technical field of batteries, and mainly relates to a nickel-metal hydride storage battery. Background technique [0002] With the rapid development of China's high-speed rail in recent years, the demand for batteries for railway passenger cars has increased. The nickel-cadmium batteries imported from abroad have greater advantages in terms of safety performance and low-temperature performance than traditional lead-acid batteries and lithium batteries. In China's railway vehicles Sectors are used on a large scale. However, nickel-cadmium batteries have shortcomings such as short service life, low energy density, environmental pollution, high self-discharge rate, memory benefit, and regular maintenance such as adding electrolyte, which is not conducive to the further development of high-speed rail equipment technology. Existing lithium battery technology is also unable to meet the stringent reliability, safety and low-tempe...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, such as large internal resistance, high temperature rise during charging and discharging, short service life, and low efficiency, and to provide a safe, reliable, environmentally friendly, non-polluting, and usable battery. A new type of Ni-MH battery with long life, good wide temperature performance and large capacity ratio. At the same time, the liquid level controller is used to charge and replenish the electrolyte through the liquid level automatic control technology, which solves the possible damage to the battery and low efficiency caused by manual operation. Therefore, the service life of the battery can also be improved, so that the battery of the present invention is particularly suitable for popularization and use on railway passenger vehicles

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