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Lithium-ion battery low temperature charging method

A technology of lithium-ion battery and charging method, which is applied in the direction of charging/discharging secondary battery, secondary battery, and secondary battery repair/maintenance, etc., can solve the problems of high safety risk and low charging capacity, etc.

Active Publication Date: 2022-02-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to solve the problem of low chargeable capacity and high safety risk when charging the battery in a cold environment

Method used

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  • Lithium-ion battery low temperature charging method
  • Lithium-ion battery low temperature charging method
  • Lithium-ion battery low temperature charging method

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Embodiment Construction

[0037] 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.

[0038] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish a f...

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Abstract

This application relates to a low-temperature charging method for lithium-ion batteries. First, a three-electrode battery with a reference electrode is provided; secondly, according to the initial state parameters of the three-electrode battery, the initial pulse current parameters are set, and the initial pulse current parameters are used for the three electrodes. The electrode battery starts to perform pulse charging, and the state parameters include at least one of the battery SOC state, battery temperature and battery SOH state, and the pulse current parameters include pulse waveform, pulse period, positive pulse amplitude, negative pulse amplitude, and positive pulse duration , Negative pulse duration; Finally, during the charging process, the negative electrode potential and battery voltage of the three-electrode battery are monitored in real time, and the pulse current parameters are adjusted according to the negative electrode potential and battery voltage. In the above method, during the charging process, by adjusting the pulse current parameters through the negative electrode potential and the battery voltage, the battery can exert the maximum charging capacity within a safe range without lithium-analysis side reactions, and realize safe and fast charging of the battery.

Description

technical field [0001] The present application relates to the technical field of battery management, in particular to a low-temperature charging method for a lithium-ion battery. Background technique [0002] In recent years, with the increasing global warming, shortage of oil resources, and energy security issues, the transformation of vehicle energy systems to meet the global low-carbon development goals is accelerating. With the continuous advancement of vehicle power battery technology, new energy vehicles represented by pure electric vehicles have become the main force of vehicle transformation. Due to the advantages of high energy density, high power density, long life, and environmental protection, lithium-ion batteries have been widely used in electronic devices such as computers and mobile phones and power battery systems for new energy vehicles in recent years. [0003] At present, the application of lithium-ion batteries in low-temperature scenarios still faces h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44H01M10/48
CPCH01M10/446H01M10/48Y02E60/10
Inventor 秦宇迪卢宇芳卢兰光杜玖玉左鹏钰欧阳明高
Owner TSINGHUA UNIV
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