BATTERY SELF-HEATING DEVICE AND METHOD, AND VEHICLE

WIPO Patent Application WO/2023/207495

A1

A battery self-heating device, comprising: a bridge arm converter (3), an energy storage element (5), an inductor (4) and a controller. The controller is configured to control, in a preset state, the connection and disconnection of the bridge arm converter (3), such that a first power battery (1) and a second power battery (2) are respectively charged/discharged by means of the inductor (4), and each form a freewheeling circuit by means of the energy storage element (5), so as to realize the continuous heating of the first power battery (1) and the second power battery (2). Further disclosed are a self-heating method executed by the device, and a vehicle having the device. Two power batteries are provided, and an energy storage element (5) is provided for freewheeling, such that an oscillation current can be generated between each of the two power batteries and an inductor (4), so as to realize low-cost and high-efficiency battery self-heating, and the stability of the total voltage of the two power batteries and the continuous flow of current in the batteries can also be ensured, thereby ensuring the safety of the batteries during the self-heating process.

LIAN YUBO (CN)
LING HEPING (CN)
YAN LEI (CN)
SONG GAN (CN)
GAO WEN (CN)

PCT/CN2023/084895

November 02, 2023

March 29, 2023

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BYD CO LTD (CN)

H01M10/615; H01M10/625; H02J7/00

CN107994299A	2018-05-04
CN105762434A	2016-07-13
CN112186307A	2021-01-05
CN113506934A	2021-10-15
JP2009142069A	2009-06-25

INNOTRACK INTELLECTUAL PROPERTY LAW FIRM (CN)

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