Vehicle and its power battery temperature control device

A temperature control device and power battery technology, which is applied in the field of vehicles, can solve the problems of uneven life of power switching devices, achieve the effects of uniform switching times, balanced device life, and improved utilization efficiency

Active Publication Date: 2021-11-12
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a vehicle and its power battery temperature control device to solve the problem that the existing power battery heating method easily leads to uneven life of power switching devices in the upper and lower bridge arms of the same phase

Method used

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  • Vehicle and its power battery temperature control device
  • Vehicle and its power battery temperature control device
  • Vehicle and its power battery temperature control device

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0030] In order to illustrate the technical solution of the present application, specific examples are used below to illustrate.

[0031] Embodiment 1 of the present application provides a power battery temperature control device, such as figure 1 As shown, the power battery temperature control device includes a motor control circuit and a heat exchange medium circulation loop. Wherein, the motor control circuit includes a three-phase inverter 101, a three-phase AC motor 102 and a control module 103, the three-phase inverter 101 is connected to the positive and negative p...

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Abstract

This application proposes a vehicle and its power battery temperature control device. In the power battery temperature control device, at least one of the three-phase inverter and the three-phase AC motor and the first valve form an electric drive cooling circuit through the heat exchange medium pipeline. The first valve and the power battery form a battery cooling circuit through the heat exchange medium pipeline; the control module detects that the temperature of the power battery is lower than the preset temperature, and when the heating condition is met, the first valve is controlled to communicate with the electric drive cooling circuit and the battery cooling circuit. And control the three-phase inverter and three-phase AC motor to heat the heat exchange medium in the electric drive cooling circuit, so as to realize the heating of the power battery, and during the heating process, according to the obtained preset direct-axis current and preset quadrature-axis current The current control three-phase inverter adjusts the phase current of the three-phase AC motor. During the adjustment process, the direction of the preset direct-axis current changes periodically during the heating process, so that the switching times of the upper and lower bridge arms of the power switching device of the same phase are even. , device lifetime balance.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a vehicle and a power battery temperature control device thereof. Background technique [0002] In recent years, the vigorous development of new energy vehicles has led to a large number of applications of lithium-ion-based power batteries. Due to the inherent characteristics of batteries, the charging and discharging capabilities of power batteries will be greatly reduced at low temperatures, which will affect the use of vehicles in cold regions. [0003] In order to solve this problem, the existing technology mainly obtains the temperature of the power battery in real time through a temperature sensor, and when the temperature of the power battery meets the preset conditions, uses the energy provided by the power battery to control the motor to run at zero torque, so as to realize the heating of the power battery . However, although this method can realize power bat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/27B60L58/26H01M10/615H01M10/613H01M10/625H01M10/633H01M10/663H01M10/42H01M10/657H01M10/6568H01M10/635H01M10/6563H01M10/637
CPCH01M10/425H01M2010/4271H01M2220/20H01M10/613H01M10/615H01M10/625H01M10/633H01M10/635H01M10/637H01M10/6563H01M10/6568H01M10/657H01M10/663Y02E60/10Y02T10/70Y02T10/72
Inventor 凌和平黄伟熊永宋淦蔡树周
Owner BYD CO LTD
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