Power battery and cooling device and method thereof

Abstract

The invention relates to a power battery and a cooling device and a cooling method thereof. The cooling device of the power battery comprises a heat dissipation pipe, a cooling chamber, a refrigeration device and a temporary storage chamber which are arranged in a power battery protection shell, wherein the refrigeration device is arranged at one side of the cooling chamber and cools a cooling liquid to enter the heat dissipation pipe in the cooling chamber, the temporary storage chamber is used for receiving the cooling liquid absorbing heat in the heat dissipation pipe, and liquid pumps controlled by a single-chip microcomputer and a relay are arranged between the cooling chamber and the input end of the heat dissipation pipe, between the temporary storage chamber and the output end of the heat dissipation pipe and between the cooling chamber and the temporary storage chamber respectively so as to achieve circulation of the cooling liquid. According to the cooling method, in circulation of a cooling liquid, the cooled medium to enter the heat dissipation pipe and the cooled medium which comes out of the heat dissipation pipe and absorbs heat are thoroughly separated, and the cooling effect is good. According to the invention, the heat dissipation rate of the power battery can be increased, so that the safety of the power battery is improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a power battery, a cooling device and a cooling method thereof. Background technique [0002] A battery refers to a part of the space of a cup, tank or other container or composite container that contains an electrolyte solution and metal electrodes to generate electric current, a device that can convert chemical energy into electrical energy. With the rapid development of modern technology, the types of batteries have become more and more. More and more, the power battery is one of them. The power battery is the power source that provides the power source for the tool, and mostly refers to the battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts. Power batteries include power lithium batteries, lead-acid power batteries, nickel-hydrogen power batteries, etc. [0003] In the process of using the existing power batte...

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Problems solved by technology

[0005] At present, power batteries generally rely on natural cooling or liquid cooling to cool down. The effect of natural cooling is poor, which is not conducive to the rapid heat dissipation of power batteries; liquid cooling generally uses water cooling, but due to the large specific heat capacity of water, water absorbs The rate of dissipating heat after heat is relatively slow. In the continuous cycle water cooling system, the cooling water that absorbs the heat of the battery cannot be cooled quickly. In the next cooling cycle, the difference between the water temperature and the body temperature of the battery is not large, which is not conducive to the rapid heat dissipation of the power battery. As a result, its heat dissipation rate cannot keep up with the heating rate of the power battery, so that with the accumulation of use time, there will be certain safety hazards

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