Low-temperature charging method for lithium ion battery

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

Active Publication Date: 2021-05-18
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is necessary to solve the problem of low chargeable ca...

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  • Low-temperature charging method for lithium ion battery
  • Low-temperature charging method for lithium ion battery
  • Low-temperature charging method for lithium ion battery

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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

The invention relates to a low-temperature charging method for a lithium ion battery. The method comprises the following steps: providing a three-electrode battery with a reference electrode; according to initial state parameters of the three-electrode battery, setting initial pulse current parameters, carrying out pulse charging on the three-electrode battery according to the initial pulse current parameters, the state parameters comprising at least one of the battery SOC state, the battery temperature and the battery SOH state, the pulse current parameters comprising a pulse waveform, a pulse period, a positive pulse amplitude, a negative pulse amplitude, a positive pulse duration and a negative pulse duration; and finally, in the charging process, monitoring the cathode potential and the battery voltage of the three-electrode battery in real time, and adjusting pulse current parameters according to the cathode potential and the battery voltage. According to the method, in the charging process, pulse current parameters are adjusted through the negative electrode potential and the battery voltage, so that the battery can exert the maximum charging capacity within the safety range without lithium precipitation side reaction, and safe and rapid charging of the battery is achieved.

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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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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