Abstract
Lithium-ion power battery has become an important part of power battery. According to the performance and characteristics of lithiumion power battery, the influence of current common charge and discharge and different cooling methods on battery performance was analysed in this paper. According to the software simulation, in the 5C charge-discharge cycle, the maximum temperature of the cells with regular arrangement is 57.97°C, the maximum temperature of the cells with staggered arrangement is 55.83°C, and the maximum temperature of phase change cooling is 47.42°C. The most important thing is that the temperature difference between the cells with phase change cooling is only 5.5°C. Some simulation results of air cooling and phase change show that phase change cooling can control the heat dissipation and temperature rise of power battery well. The research in this paper can provide better theoretical guidance for the temperature rise, heat transfer and thermal management of automotive power battery.
Highlights
As a kind of energy storage equipment, lithium-ion battery has the advantages of energy density, high cycle times, low environmental pollution, low production cost and so on
The results show that the staggered arrangement is more conducive to heat dissipation, avoiding the shielding of the airflow by the battery, to improve the heat dissipation, it is more important to control the uniformity of the heat dissipation mode, so that there will not be a large difference
Simulation results : (1) Battery arrangement, such as staggered contrast regular arrangement, has a linkage effect on the temperature of the battery, interleaved arrangement recommended. (2) the use of paraffin phase change cooling battery, battery temperature change control is better than air cooling, at the same time, but the paraffin itself increases the weight of the body, affecting the vehicle range
Summary
As a kind of energy storage equipment, lithium-ion battery has the advantages of energy density, high cycle times, low environmental pollution, low production cost and so on. As the market for specific energy of batteries is constantly increasing, which is accompanied by the safety problem of batteries. It is necessary to ensure the safety of the battery working at the most appropriate temperature. Battery thermal management system as the name suggests is to control the battery in order to battery can work in the appropriate environment, came into being. Start from a practical context, on the premise of considering the cooling cost and efficiency, air cooling, liquid cooling and phase change cooling become the mainstream
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