The heat release law of lithium ion battery during different cycles of charging‐discharging rate was studied by the LAND testing device. Studies have shown that: When charging at 0.5C and discharge cycles at 0.5C, 1C, 2C, and 3C, respectively, the battery cycle heat dissipation increases with the increase of the discharge rate, and the temperature rise ratio of the battery after the 3C cycle is 0.5C, 1C, 2C is higher by 30.8 °C, 21.4 °C, and 9 °C; 0.5C, 1C, 2C, 3C rechargeable battery temperature rise after 1C discharge and 0.5C, 1C, 2C, 3C charge cycles, respectively. The heights are 13.8 °C, 18.1 °C, 37.6 °C, and 44.3 °C, respectively; when the battery is cycled at a 3C charging‐discharging rate, the battery voltage suddenly changes to 0 V after the 2nd cycle; when the charge current and discharge current are relatively small, the heat generated during low‐rate charging high‐rate discharge cycles is larger, and when the charge current and the discharge current are relatively large, the heat generated at the low‐rate charging high rate discharge cycle is smaller than the high‐rate charging low‐rate discharge cycle. The research obtained the heat dissipation data of lithium‐ion batteries under different charging‐discharging rates, which provided an important basis for the safe operation of lithium‐ion batteries.

中文翻译：

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不同充放电方式对锂离子电池热行为的影响

利用LAND测试仪研究了锂离子电池在不同倍率充放电过程中的放热规律。研究表明：当分别在0.5C充电和0.5C，1C，2C和3C的放电周期时，电池循环的散热量随放电速率的增加而增加，并且在充电后，电池的温度升高率3C周期为0.5C，1C，2C分别高出30.8°C，21.4°C和9°C; 1C放电和0.5C，1C，2C，3C充电周期后，可充电电池的温度分别上升0.5C，1C，2C，3C。高度分别为13.8°C，18.1°C，37.6°C和44.3°C；当电池以3C的充电速率循环时，第二个循环后电池电压突然变为0 V；当充电电流和放电电流相对较小时，低倍率充电高倍率放电周期产生的热量较大，当充电电流和放电电流较大时，低倍率充电高倍率放电周期产生的热量小于高倍率充电低速放电周期。研究获得了不同充放电速率下锂离子电池的散热数据，为锂离子电池的安全运行提供了重要依据。