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Vehicle and power battery temperature control device thereof

A technology of temperature control device and power battery, which is applied in the field of vehicles and can solve the problems of uneven life of power switching devices

Active Publication Date: 2020-06-30
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 power battery temperature control device thereof
  • Vehicle and power battery temperature control device thereof
  • Vehicle and power battery temperature control device thereof

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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

The application provides a vehicle and a power battery temperature control device thereof. At least one of a three-phase inverter and a three-phase alternating current motor in the power battery temperature control device and a first valve form an electric drive cooling loop through a heat exchange medium pipeline, and the first valve and a power battery form a battery cooling loop through a heatexchange medium pipeline; when a control module detects that the temperature of the power battery is lower than a preset temperature and heating conditions are satisfied, the first valve is controlledto communicate the electric drive cooling loop with the battery cooling loop; the three-phase inverter and the three-phase alternating current motor are controlled to heat a heat exchange medium in the electric drive cooling loop to realize the heating of the power battery; and the three-phase inverter is controlled to adjust the phase current of the three-phase alternating current motor according to the obtained preset direct-axis current and the preset quadrature-axis current in the heating process. In the adjusting process, the direction of the preset direct-axis current changes periodically in the heating process, so that the switching times of upper and lower bridge arms of the same-phase power switching device are uniform, and the service life of the device is balanced.

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 Applications(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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