The invention provides an automobile battery pack preheating method and device, and the method comprises the steps: obtaining a charge state value of a battery pack in response to a battery pack preheating signal; if the charge state value of the battery pack is smaller than a preset fast charge threshold value, controlling the battery pack to perform energy exchange with an alternating current power grid and/or an energy storage component according to a set frequency; wherein the preset fast charging threshold value is obtained according to a charge state value corresponding to a critical point when the battery pack drops from the maximum charging speed. Namely, by controlling energy interaction between the battery pack and the external energy storage component and/or the alternating current power grid, positive and negative fluctuating alternating current can be generated in the battery pack, and the alternating current acts on the internal resistance of the battery pack to automatically heat, so the temperature of the battery pack is increased. According to the scheme, the temperature of the battery pack is increased in a self-heating manner, so that the battery pack has relatively high temperature increasing speed and very good uniformity.
本申请提供一种汽车电池包预热方法及装置,其中的方法包括:响应于电池包预热信号,获取电池包的荷电状态值;若所述电池包的荷电状态值小于预设快充阈值,则控制所述电池包按照设定频率与交流电网和/或储能部件进行能量交换;所述预设快充阈值根据所述电池包从最大充电速度下降时的临界点对应的荷电状态值得到。即,通过控制电池包与外部储能部件和/或交流电网之间的能量交互,能够使电池包内部产生正负波动的交流电,交流电作用于电池包的内阻自动发热,从而提升电池包的温度。以上方案,电池包通过自发热的方式进行升温,不但具有较高的升温速度,而且具有非常好的均匀性。
Automobile battery pack preheating method and device
汽车电池包预热方法及装置
2021-11-16
Patent
Electronic Resource
Chinese
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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