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A power battery self-heating method and its system and automobile

A technology of power battery and self-heating, which is applied in the direction of secondary battery, secondary battery repair/maintenance, secondary battery charging/discharging, etc. The performance is affected by temperature and fluctuates greatly, so as to save costs, reduce system complexity, and improve reliability

Active Publication Date: 2021-06-22
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a power battery self-heating method, a power battery self-heating system and an automobile, so as to solve the problem that the charge and discharge performance of the power battery fluctuates greatly due to the influence of temperature, especially at low temperatures, the charge and discharge performance of the power battery is greatly reduced and affects the entire vehicle The problem of energy storage power supply

Method used

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  • A power battery self-heating method and its system and automobile
  • A power battery self-heating method and its system and automobile
  • A power battery self-heating method and its system and automobile

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Embodiment Construction

[0029]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0030] In the following description, for the sake of clarity and conciseness, not all the multiple components shown in the drawings are described, and the multiple components shown in the accompanying drawings provide those of ordinary skill in the art with a fully capable implementation of the present invention. public content. The operation of many of the components will be familiar and apparent to those skilled in the art.

[0031] In addition, the terms ...

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Abstract

The invention discloses a power battery self-heating method, its system and an automobile. The method is used in a power battery self-heating system. The system includes a first power battery, a second power battery, a DC voltage converter and a vehicle control system. device, wherein the first power battery and the second power battery are batteries with different types of charging media, and the method is executed by a vehicle controller. The invention utilizes the difference in charging and discharging performance of power batteries with different charging media at low temperatures, and uses the heat generated inside the battery cell during charging and discharging to realize self-heating of the battery, which saves costs, reduces system complexity, and improves reliability. At the same time, the real-time adjustment of the heating power is realized by controlling the charging and discharging current, and then the heating time can be controlled according to the needs.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a power battery self-heating method and system thereof and an automobile. Background technique [0002] At present, electric vehicles mainly have one type of battery for energy storage and power supply, and the battery type is mostly a ternary lithium battery or a lithium iron phosphate battery. Ternary lithium batteries or lithium iron phosphate batteries have the advantages of large capacity, high power density, and high cost performance. However, the charge and discharge performance of this type of battery is greatly affected by temperature, especially at low temperatures. The charging capacity of power batteries is greatly reduced. If the power battery is forced to be charged according to a large charging current, it will cause permanent damage to the power battery and affect the battery life. Ni-MH batteries have good low-temperature charging and discharging charact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/637H01M10/635H01M10/44
CPCH01M10/443H01M10/615H01M10/625H01M10/635H01M10/637Y02E60/10
Inventor 董继维徐斌王乃瑞张闯
Owner ZHEJIANG GEELY HOLDING (GROUP) CO LTD
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