Power battery heating method and device of electric automobile and automobile

A technology for power batteries and electric vehicles, applied in electric vehicles, battery/fuel cell control devices, control devices, etc., can solve the problems of low energy conversion efficiency and achieve the effect of improving energy conversion efficiency and increasing internal resistance heating power

Active Publication Date: 2021-12-03
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for heating a power battery of an electric vehicle, and the vehicle, so as to solve the problem of low energy conversion efficiency when the power battery is heated

Method used

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  • Power battery heating method and device of electric automobile and automobile
  • Power battery heating method and device of electric automobile and automobile
  • Power battery heating method and device of electric automobile and automobile

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Embodiment Construction

[0028] Next, the technical solutions in the embodiments of the present invention will be described in conjunction with the drawings of the embodiments of the present invention, and it is clear that the described embodiments are intended to be in an embodiment of the invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained without creative labor are not made in the premise of creative labor.

[0029] In one embodiment, if figure 1 As shown, a power battery heating method of an electric vehicle is provided, including the following steps:

[0030] S11: Get the heat generation requirements of the power battery 11.

[0031] Among them, the power battery 11 is a power battery 11 mounted on the electric vehicle, the power battery 11 being a lithium ion battery. The fever demand power is set to the user according to the heat demand of the power battery 11. Illustratively, when using an electric vehicle, it is necessary to spe...

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PUM

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Abstract

The invention discloses a power battery heating method and device of an electric automobile and the automobile. The method comprises the following steps that heating demand power of a power battery is obtained; power demand information of an electric automobile driving module is obtained in real time, and the current heating power of a power battery is determined according to the power demand information; when the current heating power is smaller than the heating demand power, compensation heating current is obtained according to the heating demand power and the current heating power; when the motor controller controls the driving motor to drive the electric automobile to run according to the power demand information, the motor controller regulates and controls the control current of the driving motor according to the compensation heating current, and then the high-frequency oscillation current output by the driving motor is made to be equal to the compensation heating current; and the power battery performs self-heating according to the high-frequency oscillation current output by the driving motor. On the premise that power demand information is met, the high-frequency oscillation current output by the driving motor is increased to meet the self-heating demand of the power battery, and the heating rate and efficiency are improved.

Description

Technical field [0001] The present invention relates to the field of electric vehicles, and more particularly to a power battery heating method, apparatus, and a vehicle for electric vehicles. Background technique [0002] With the development of science and technology, electric vehicles are gradually widely used. The electric vehicle market share is increasing, and the power battery is used as the core power source in electric vehicles, which is applied to different environments, but in different environments, power batteries Performance is easily affected by ambient temperature. For example, when the power battery is in a low temperature environment of 0.9 ° C, the internal resistance of the power battery has increased, which reduces the power output and available capacity of the power battery, affecting the performance of the electric vehicle. [0003] Currently, a heating tube is placed outside the power battery is commonly employed, and the power battery is heated from the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/27B60L15/20
CPCB60L58/27B60L15/20B60L2240/429H01M10/615H01M10/625H01M10/637H01M10/6571Y02E60/10Y02T10/70Y02T10/72B60L2240/545B60L15/08B60L58/25B60L2240/421B60L2240/423H01M10/633H01M10/63H01M10/486H01M2220/20B60L15/025B60L2220/58B60Y2200/91
Inventor 何龙邓林旺冯天宇刘思佳
Owner BYD CO LTD
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