Nickel-metal hydride battery

Abstract

The invention discloses a nickel-metal hydride battery. The nickel-metal hydride battery includes a first battery and a second battery. The first battery and the second battery are connected in parallel. Charging resistance of the first battery is greater than charging resistance of the second battery. The first battery includes a shell body and a plurality of first battery cells disposed inside the shell body. The plurality of first battery cells are connected in series and then electrically connected to a positive electrode terminal and a negative electrode terminal disposed at the top of the shell body. The shell body is hexahedral. The second battery includes a housing and a plurality of second battery cells disposed inside the housing. The plurality of second battery cells are connected in series and then electrically connected to a positive output terminal and a negative output terminal disposed at the top of the housing. The positive electrode terminal and the positive output terminal are electrically connected through a first connection plate. The negative electrode terminal and the negative output terminal are electrically connected through a second connection plate. A plurality of heat conducting fins are disposed on both the first connection plate and the second connection plate.

Description

technical field [0001] The invention relates to the technical field of nickel-hydrogen batteries, in particular to a nickel-hydrogen battery. Background technique [0002] Ni-MH batteries are synthesized by hydrogen ions and metallic nickel. They have 30% more power reserve than Ni-Cd batteries, are lighter than Ni-Cd batteries, have a longer service life, and are non-polluting to the environment. [0003] The "metal" part in a NiMH battery is actually a metal hydride. Used in the manufacture of nickel-metal hydride batteries, metal hydrides are mainly divided into two categories. The most common one is AB5, A is a mixture of rare earth elements (or) plus titanium (Ti); B is nickel (Ni), cobalt (Co), manganese (Mn), (or) and aluminum ( Al). The "multi-component" electrodes of some high-capacity batteries are mainly composed of AB2, where A is titanium (Ti) or vanadium (V), B is zirconium (Zr) or nickel (Ni), and Add some chromium (Cr), cobalt (Co), iron (Fe) and / or manga...

AI Technical Summary

Problems solved by technology

[0006] Charging with an excessively high charging current will shorten the service life of the Ni-MH battery

[0007] Charging with an excessively high charging current will cause the temperature of the Ni-MH battery to rise

When the temperature rises, the internal resistance of the Ni-MH battery becomes smaller, which in turn leads to an increase in the charging current, which further leads to more heat generated during charging. Excessive heat makes the Ni-MH battery unsafe to use.

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