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Title:
VEHICLE AND POWER BATTERY HEATING APPARATUS AND METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/125769
Kind Code:
A1
Abstract:
A vehicle and a power battery heating apparatus and method therefor. According to the power battery heating method, when the current temperature value of a power battery is below a preset temperature value and a heating condition of the power battery meets a preset condition, a three-phase inverter is controlled so that a three-phase alternating current motor generates heat according to heating energy to heat a cooling liquid flowing through the power battery; a preset quadrature-axis current that enables the torque value output by the motor to be an appropriate value is obtained, and a corresponding preset direct-axis current is obtained according to heating power of the power battery; then, during a heating process, the three-phase inverter is controlled according to the preset direct-axis current and the preset quadrature-axis current to adjust the phase current of the three-phase alternating current motor, so that the motor shaft outputs electromagnetic torque having a small torque value that cannot move the vehicle and does not damage components of a transmission mechanism of the vehicle, and the motor output shaft only outputs a preload to the transmission mechanism to eliminate the meshing clearance. Thus, a vehicle is effectively prevented from shaking.

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Inventors:
LIAN YUBO (CN)
LING HEPING (CN)
PAN HUA (CN)
ZHANG YUXIN (CN)
CHEN HAO (CN)
Application Number:
PCT/CN2019/127109
Publication Date:
June 25, 2020
Filing Date:
December 20, 2019
Export Citation:
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Assignee:
BYD CO LTD (CN)
International Classes:
B60L58/27
Foreign References:
CN108306078A2018-07-20
CN104249629A2014-12-31
CN106347067A2017-01-25
CN108736108A2018-11-02
CN103560304A2014-02-05
US20140012447A12014-01-09
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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