Heat radiation system of nickel-hydrogen battery set for hybrid power vehicle

Abstract

The invention discloses a Nickel-hydrogen battery pack heat dissipation system used in a hybrid motor vehicle. A reasonable battery interval and a suitable inclination angle are first designed to realize the vertical flow of air; and an upper layer battery and a lower layer battery are arranged at a certain interval; the lower layer battery is at the central line of the upper layer battery and the upper layer battery is at the central line of the lower layer battery, which causes the air not to flow into the upper side flow channel of the battery earlier; secondly, a thermal resistor is added on the battery surface based on the improvement of the structure; the thermal resistor is wrapped on the outside of a the battery module; the required wrapping thickness of each module is determined based on the heat dissipation effect; the surface of the battery with low temperature and good heat dissipation effect is thicker and the surface of the battery with high temperature and poor heat dissipation effect is thinner, thus the heat exchange between the battery and the air is reduced, and the local battery temperature is improved, and furthermore the temperature homogeneity of the whole battery pack is improved. The invention relates to a method that takes the temperature homogeneity of the module as priority by compromising the heat dissipation strength of the battery.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics applications, and in particular relates to a heat dissipation system for the thermal resistance of a battery pack used in a hybrid electric vehicle. Background technique [0002] The power battery is the key control component in the hybrid electric vehicle system, and its performance will directly affect the performance of the whole vehicle. Power nickel-metal hydride batteries have become the preferred power source for HEV vehicles due to their high specific energy, high specific power, good cycle life, no pollution to the environment, and high safety. However, the heat generation problem during the charging process of nickel-hydrogen batteries affects its normal operation One of the main factors of application. As the temperature rises, the discharge capacity of the Ni-MH battery decreases, the charging efficiency decreases, the self-discharge increases, and the battery attenuati...

AI Technical Summary

Problems solved by technology

The main disadvantages are: there is the possibility of liquid leakage; the weight is relatively large; repair and maintenance are complicated; components such as water jackets and heat exchangers are required, and the structure is relatively complicated

The main disadvantages are: complex repair and maintenance; relatively high cost

For the cylindrical battery studied, its wedge-shaped intake and exhaust channels and drainage channels are difficult to ensure the consistency of the temperature field distribution of the battery pack

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