Effect of Different Operation Condition on Temperature Field of Lithium-Ion Battery Pack
Aiming at the problem of internal temperature variation and uneven distribution of lithium battery pack,the temperature field of charge and discharge under different working conditions was studied.The results show that when the battery pack runs in the normal temperature range,the temperature decreases,the temperature rise increases,and the temperature difference is basically unchanged.With the increase of charge/discharge rate,the temperature rise and temperature difference increase.In low temperature environ-ment,with the decrease of temperature,the temperature rise increases,and the temperature difference also increases.In the continuous cycle,the small rate charging can help the package temperature return to the normal value,reducing or even eliminating the influence of heat accumulation in the early stage on the later application.Therefore,a series of methods can be used to reduce the temperature rise and maintain the uni-formity of the internal temperature field of the battery by reducing the charging rate,carefully discharging the large current at low temperature,and avoiding continuous use.
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