The invention discloses a variable-amplitude variable-frequency alternating current self-heating method for a lithium ion battery at a low temperature, and relates to the field of lithium ion batteries. Comprising the steps that the maximum current amplitude Imax of an alternating-current self-heating waveform is obtained, the optimal heating frequency Fopt of the alternating-current self-heating waveform is obtained, a load device generates the alternating-current self-heating waveform with the current amplitude Imax and the heating frequency Fopt to conduct low-temperature self-heating on a battery, and along with self-heating of the battery, the temperature rises, and the battery is heated. And continuously and repeatedly adjusting the maximum current amplitude Imax and the optimal heating frequency Fopt to perform self-heating on the battery. The invention provides the variable-amplitude variable-frequency alternating current self-heating method for the lithium ion battery at the low temperature, and the maximum heat production power, the optimal heating efficiency, the fastest heating rate and the minimum influence on the battery of the battery are ensured.

    本发明公开了一种锂离子电池低温下变幅变频的交流自加热方法,涉及锂离子电池领域。包括:获取交流自加热波形的最大电流幅值Imax、获取交流自加热波形的最优加热频率Fopt、负载设备生成电流幅值为Imax和加热频率为Fopt的交流自加热波形对电池进行低温自加热、随着电池自加热,温度上升,不断重复调整最大电流幅值Imax和最优加热频率Fopt对电池进行自加热。本发明提供了一种锂离子电池低温下变幅变频的交流自加热方法,保证了电池产热功率最大、加热效率最优、加热速率最快和对电池影响最小。


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    Title :

    Alternating current self-heating method for variable amplitude and variable frequency of lithium ion battery at low temperature


    Additional title:

    一种锂离子电池低温下变幅变频的交流自加热方法


    Contributors:
    LI BINHUA (author) / HUANG WENJIE (author) / LIAO CHANGJIANG (author) / XIONG GANGTING (author) / ZENG TAO (author) / LUO JUNJIE (author) / LU CHENGBIN (author) / LIU JUNHAI (author) / CAI HONGYING (author)

    Publication date :

    2024-03-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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



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