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Motor control circuit, charging method and heating method of power battery

A technology of motor control and power battery, which is applied in the direction of AC motor control, electric vehicle charging technology, battery circuit device, etc., and can solve the problems of increasing device size and cost

Active Publication Date: 2020-06-30
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a motor control circuit, a charging method for a power battery, a heating method for a power battery, and a vehicle, so as to solve the problems in the prior art that a booster circuit needs to be added when the power battery is charged using a boost charging method. Heating the power battery needs to increase the PTC heater, which leads to the problem of increasing the volume and cost of the whole device

Method used

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  • Motor control circuit, charging method and heating method of power battery
  • Motor control circuit, charging method and heating method of power battery
  • Motor control circuit, charging method and heating method of power battery

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Embodiment Construction

[0028] 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.

[0029] In order to illustrate the technical solution of the present application, specific examples are used below to illustrate.

[0030] Embodiment 1 of the present application provides a motor control circuit, such as figure 1 As shown, the motor control circuit includes a three-phase inverter 103 and a second switch module 105, the three-phase AC motor 104, the three-phase inverter 103 and the second switch module 105 are connected in sequence, and the motor control circuit also includes a first switch module 102. The one-way conduction module 109 and the control modul...

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Abstract

The application provides a motor control circuit, a charging method of a power battery, a heating method of the power battery and a vehicle. The motor control circuit comprises a three-phase inverter,a second switch module, a first switch module, a one-way conduction module and a control module. The control module compares the voltage of a power supply module with the voltage of a power battery;the first switch module, the second switch module and the three-phase inverter are controlled according to the comparison result; the power supply module carries out boosting charging or direct charging on the power battery; meanwhile, the one-way conduction module is additionally arranged based on the charging circuit, so that the power supply module, the one-way conduction module, the three-phase inverter and a three-phase alternating current motor form a heating circuit, so that heat is provided for a to-be-heated part in the whole vehicle, that is, the three-phase alternating current motorand the three-phase inverter are reused in different circuits through the control switch module, so that the charging function and the heating function are achieved.

Description

technical field [0001] The present application relates to the technical field of automobiles, in particular to a motor control circuit, a charging method for a power battery, a heating method for a power battery and a vehicle. Background technique [0002] With the development and rapid popularization of electric vehicles, the charging technology of electric vehicle power batteries has become more and more important. The charging technology needs to meet the needs of different users. The current boost charging circuit is generally between the charging pile and the power battery. A DC / DC bridge circuit with bidirectional buck-boost is added to the positive and negative busbars. Low-temperature battery heating generally uses PTC heaters or electric heating wire heaters to heat the coolant in the battery cooling circuit at low temperatures, and the coolant is used to heat the battery. The battery cells are heated to a predetermined temperature. There are also other solutions t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/00B60L58/27H02P25/16H02J7/00
CPCH02P25/16Y02T10/70Y02T10/7072Y02T90/14Y02T10/64Y02T10/72
Inventor 黄伟谢飞跃聂琪谢鸿福郑益浩
Owner BYD CO LTD
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