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Control method and control system for heating battery of electric vehicle and electric vehicle

A technology of electric vehicle and control method, applied in electric vehicles, battery/fuel cell control device, power management and other directions, can solve problems such as increasing cost

Pending Publication Date: 2020-07-07
BYD AUTO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this battery heating method needs to be equipped with a special heater separately, which increases the cost

Method used

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  • Control method and control system for heating battery of electric vehicle and electric vehicle
  • Control method and control system for heating battery of electric vehicle and electric vehicle
  • Control method and control system for heating battery of electric vehicle and electric vehicle

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Embodiment Construction

[0027] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0028] Generally, the motor control system of an electric vehicle may include: a battery 20, a motor control device 21, an inverter 22, and a motor 23, etc., such as figure 2 shown. Wherein, the shown battery 20 is connected to the inverter 22 for supplying power to the inverter 22; the motor control device 21 is connected to the inverter 22 for supplying power to the inverter 22 Provide a modulation control signal; the inverter 22 is connected to the motor, and is used to control the on-off of its switching element according to the modulation control signal provided, so as to output the corresponding control voltage to the motor 23, thereby controlling the mo...

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PUM

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Abstract

The invention relates to the field of electric vehicles, and discloses a control method and control system for heating a battery of an electric vehicle and the electric vehicle. The control method comprises the steps of calculating a pulse width modulation signal according to the current position of a rotor of a motor of the electric vehicle; controlling on-off of a switching element of an inverter of the electric vehicle according to the pulse width modulation signal so as to output a control voltage; and loading the control voltage to a stator coil of the motor to generate a current that forms a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil. According to the control method, a heater does not need to be additionally arranged, and by controlling a permanent magnet synchronous motor arranged on the electric vehicle, the circulating liquid introduced into the battery can be heated on the basis of ensuringthat the motor does not rotate.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a control method for heating batteries of the electric vehicle, a control system and the electric vehicle. Background technique [0002] Currently, the commonly used battery heating method is to use the heater 10 to heat the circulating fluid flowing into the battery 20, so that the battery heats up, thereby avoiding the loss of activity due to the low temperature of the battery, such as figure 1 shown. However, this battery heating method needs to be equipped with a special heater separately, which increases the cost. Contents of the invention [0003] The object of the present invention is to provide a control method for heating the battery of an electric vehicle, a control system and the electric vehicle, which can control the permanent magnet synchronous motor equipped with the electric vehicle without additional configuration of the heater. On the basis of ensuring that ...

Claims

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Application Information

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IPC IPC(8): B60L58/27
CPCY02T10/70Y02T10/72
Inventor 车炎坷肖恺李江华杜智勇
Owner BYD AUTO IND CO LTD
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