{
  "$type": "site.standard.document",
  "description": "This application provides a vehicle and a power battery heating apparatus and method thereof. In the power battery heating method, when a current temperature value of a power battery is lower than a preset temperature value, and a heating condition of the power battery meets a preset condition, a…",
  "path": "/patents/1313023",
  "publishedAt": "2022-03-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L58/27",
    "BYD COMPANY LIMITED"
  ],
  "textContent": "This application provides a vehicle and a power battery heating apparatus and method thereof. In the power battery heating method, when a current temperature value of a power battery is lower than a preset temperature value, and a heating condition of the power battery meets a preset condition, a three-phase inverter is controlled to cause a three-phase alternating current motor to generate heat according to heating energy to heat a coolant flowing through the power battery. A preset quadrature-axis current that causes a torque value outputted 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, to control, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter to adjust a phase current of the three-phase alternating current motor in the heating process, so that electromagnetic torque with a relatively small torque value is outputted at a motor shaft. The electromagnetic torque cannot cause the vehicle to move, also cannot cause a damage to parts and components of a transmission mechanism of the vehicle. It only causes the motor output shaft to output a pre-tightening force to the transmission mechanism, thereby eliminating an engagement gap and effectively avoiding jitter of the vehicle.",
  "title": "VEHICLE AND POWER BATTERY HEATING APPARATUS AND METHOD THEREFOR"
}