Cooling method based on heat-radiating and cooling system of battery pack

Abstract

The invention discloses a cooling method based on a heat-radiating and cooling system of a battery pack. The cooling method of the heat-radiating and cooling system of the battery pack comprises the following steps: a), a cooling air flow enters an air inlet pipeline 2 through an air amplifier 5 on an air inlet 4, is blown to an arc-shaped-structure side wall on the air inlet pipeline 2, is blown to the battery pack after being reflected through the arc-shaped-structure side wall, is blown over an air passage 7 between battery rows of the battery pack, and then enters an air outlet pipeline 3, and in the process, the cooling air flow is also blown to a gap between battery monomers 8 of the batter rows; b), the cooling air flow in the air outlet pipeline 3 flows through an air amplifier 5 on an air outlet 6, then is blown out from the air outlet 6, and takes away the heat of the battery pack. The cooling method based on the heat-radiating and cooling system of the battery pack has the following advantages: 1, the cooling effect is good; the use is safe; the leakage is prevented.

Description

technical field [0001] The invention relates to the technical field of electric vehicle battery packs, in particular to a cooling method based on a battery pack heat dissipation cooling system. Background technique [0002] The power battery is the key technology of electric vehicles. If the battery temperature is too high or the temperature difference between battery cells increases, the service life of the battery will be shortened. The temperature and the difference have a double impact on the power battery pack: the increase in temperature will reduce the internal resistance of the battery and accelerate the internal chemical reaction rate. Some studies have shown that when the battery is working at 45 ° C, the number of cycles is reduced by 60%; the battery is at high temperature. When charging at a high rate, a temperature rise of 5°C will halve the battery life. Therefore, the battery pack cooling system has very important practical significance to the performance of...

AI Technical Summary

Problems solved by technology

The heat dissipation effect of phase change materials is generally better than air heat dissipation, but there are also some disadvantages: when the phase change materials are directly in contact with the battery module for heat exchange, if deformation occurs, the effect of cooling and heat dissipation will be affected; and due to the complex structure, the weight and cost

Power battery heat pipe cooling technology is still in the laboratory research stage

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