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A lithium battery AC internal heating circuit and heating method

A technology of internal heating and lithium batteries, applied in circuits, secondary batteries, electrical components, etc., can solve problems such as shortened mileage and the impact of popularization of electric vehicles

Active Publication Date: 2021-07-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the energy loss encountered by lithium-ion batteries in low-temperature environments, electric vehicles have greatly shortened their cruising range, which has had a serious impact on the popularity of electric vehicles.

Method used

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  • A lithium battery AC internal heating circuit and heating method
  • A lithium battery AC internal heating circuit and heating method
  • A lithium battery AC internal heating circuit and heating method

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Embodiment Construction

[0035] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0037] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combi...

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Abstract

The invention discloses an alternating current internal heating circuit and a heating method based on a step-up chopper circuit, which uses alternating current to realize rapid internal heating of a lithium-ion battery in a low-temperature environment. The circuit includes a battery module, a first loop, a second loop, and a third loop respectively connected to the battery module; the first loop includes a first energy storage element and a first switch tube connected to the first energy storage element; The second loop includes a first energy storage element, a second switch tube connected to the first energy storage element, and a second energy storage element connected to the source of the second switch tube; the third loop includes a third switch tube and the second energy storage element connected to the drain of the third switch tube.

Description

technical field [0001] The disclosure belongs to the field of thermal management of lithium-ion batteries, and in particular relates to an AC internal heating circuit based on a step-up chopper circuit and a heating method. Background technique [0002] Energy crisis and environmental pollution have become two major problems affecting the development of today's society. Faced with these two major problems, the development of electric vehicles has become the mainstream direction of the automotive industry. As the core part of electric vehicle power battery, it is a key factor affecting the development of electric vehicles. Lithium-ion batteries have become the main batteries used in electric vehicles due to their advantages such as good safety, long cycle life, small self-discharge, and high specific energy. [0003] However, lithium-ion batteries have their limited working conditions. Lithium-ion batteries will have a better performance at room temperature, but in low-temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/637
CPCY02E60/10
Inventor 崔纳新杨亚宁张员喜杨宾方浩然王光臣
Owner SHANDONG UNIV