Electric vehicle driving system, driving circuit and electric vehicle battery heating method

A driving circuit and electric vehicle technology, applied in electric vehicles, battery/fuel cell control devices, vehicle energy storage, etc., can solve the problems of low heating power and heating efficiency

Pending Publication Date: 2019-08-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide an electric vehicle drive system, drive circuit and electric vehicle battery heating method for the traditional battery pack heating power and low heating efficiency.

Method used

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  • Electric vehicle driving system, driving circuit and electric vehicle battery heating method
  • Electric vehicle driving system, driving circuit and electric vehicle battery heating method
  • Electric vehicle driving system, driving circuit and electric vehicle battery heating method

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Embodiment Construction

[0045] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0046] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to"...

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Abstract

The invention provides an electric vehicle driving system, a driving circuit and an electric vehicle battery heating method. The electric vehicle driving system comprises a first controller, a power supply unit and an inverter circuit. The power supply unit includes two battery packs. When electric vehicle batteries are heated, one ends of the two battery packs are independent of each other, and the other ends of the two battery packs are collinear. The electric vehicle battery heating method comprises the steps that opening and closing of three bridge arms of the inverter circuit are controlled through the first controller, the two battery packs are charged and discharged mutually with the assistance of a motor coil, and the power supply unit is further enabled to be polarized, so that the controllable temperature rise of the batteries of the power supply unit is realized. The maximum working current of a power switching device in the inverter circuit is higher, and the electric vehicle battery heating method can realize high-power heating without additionally arranging other devices by using the electric vehicle driving system, so that the heating efficiency is effectively improved.

Description

technical field [0001] The present application relates to the field of new energy vehicles, in particular to an electric vehicle drive system, a drive circuit and a battery heating method for the electric vehicle. Background technique [0002] The characteristics of lithium batteries decay at low temperatures. In winter or in cold regions, the battery must be heated first during the use of electric vehicles in order to improve the driving range and charging performance of electric vehicles. [0003] In the traditional solution, the battery pack heating solution includes external heating of the battery through the charger / charging pile, but this solution is only available when the electric vehicle is charging, and cannot meet the low-temperature shelving start-up problem when the electric vehicle is not connected to the charging pile. In the traditional scheme, the battery pack heating scheme also includes the method of adding heating nickel sheets inside the battery, but th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/27
CPCB60L58/27Y02T10/72Y02T10/70
Inventor 李亚伦郭东旭欧阳明高卢兰光杜玖玉李建秋
Owner TSINGHUA UNIV
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