Battery pack self-heating method, battery pack, power utilization device and vehicle

• Main Authors: WU RONGFANG, LI JIANNIAN, GUO ZIZHU, ZHANG KE, WANG XI
• Format: Patent
• Language: Chinese; English
• Published: 07.11.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a battery pack self-heating method, a battery pack, a power utilization device and a vehicle, and relates to the technical field of electric automobiles, the temperature of the battery pack is collected, when the temperature is lower than a temperature threshold value, an energy battery pack with the large capacity on the battery pack is controlled to be self-heated through first alternating current, and in addition, self-heating of the battery pack is controlled through second alternating current; self-heating of the power battery pack with the small capacity on the battery pack is controlled through the second alternating current, the difference value between the temperature rise rate of the energy battery pack and the temperature rise rate of the power battery pack is made to be within the preset range, and rapid heating of the battery pack is achieved. 本公开提供一种电池包自加热方法、电池包、用电装置及车辆，涉及电动汽车技术领域，采集电池包的温度，当该温度低于温度门限值时，通过第一交流电控制电池包上容量较大的能量电池组自加热，并且，通过第二交流电控制电池包上容量较小的功率电池组自加热，并使得能量电池组和功率电池组