Lithium battery AC internal heating circuit and heating method

Abstract

The invention discloses a lithium battery AC internal heating circuit and heating method based on a boost chopper circuit. The fast internal heating on the lithium ion battery in the low-temperature environment is realized by adopting the AC. The circuit comprises a battery module, and a first loop, a second loop and a third loop which are connected with the battery module; the first loop comprises a first energy storage element, and a first switch tube connected with the first energy storage element; the second loop comprises a first energy storage element, a second switch tube connected witha second energy storage element, and a second energy storage element connected with a source electrode of the second switch tube; and the third loop comprises a third switch tube and the second energy storage element connected with a drain electrode 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...

Examples

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...

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...

Examples

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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