Method for determining fast charging strategy of lithium battery

A lithium battery and strategy technology, applied in secondary battery charging/discharging, secondary battery repair/maintenance, measuring electricity, etc., to achieve the effect of reducing research and development time

Active Publication Date: 2022-01-25
TIANJIN LISHEN BATTERY +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mainstream fast charging mode is step charging, but there is no clear method for determining the step process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining fast charging strategy of lithium battery
  • Method for determining fast charging strategy of lithium battery
  • Method for determining fast charging strategy of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) After the battery is charged at 0.33C to 20% SOC, it is charged and discharged 10 times at 2C for 3 minutes, and the charge and discharge time are both 3 minutes. Then the battery continues to be charged at a constant current of 0.33C to 100% SOC, and the cut-off voltage is 4.2V. After resting for 10 minutes, the battery is discharged to 0% SOC at 0.33C, and the cut-off voltage is 2.5V. The entire cycle efficiency including high charge and discharge pulses is denoted as E1.

[0020] (2) After the battery is charged at 0.33C to 30% SOC, it is charged and discharged 10 times at 2C, and the charging and discharging time is 3 minutes. Then the battery continues to be charged at a constant current of 0.33C to 100% SOC, and the cut-off voltage is 4.2V. After resting for 10 minutes, the battery is discharged to 0% SOC at 0.33C, and the cut-off voltage is 2.5V. The entire cycle efficiency including high charge and discharge pulses is denoted as E2.

[0021] (3) After th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for determining a fast charging strategy of a lithium battery. The method comprises a pulse method and a three-electrode method; the pulse method is applied, a battery is subjected to high-pulse charging and discharging in the charging process, and the fast charging system of a battery system is determined by comparing the charging and discharging efficiency of the battery; a three-electrode method is used for determining a specific charging system of a battery under specific requirements, a battery system needing stepped charging is determined according to a pulse method, and three electrodes are used for monitoring the negative electrode potential in the stepped charging current change process so as to avoid negative electrode lithium precipitation, so that a safe stepped charging specific system is determined. According to the method provided by the invention, rapid evaluation can be carried out and a system rapid charging strategy can be formulated within one week. Compared with previous cycle evaluation as long as several months, the research and development time can be greatly shortened.

Description

technical field [0001] The invention relates to the field of lithium ion battery fast charging, in particular to a method for evaluating and determining a lithium ion battery fast charging strategy. Background technique [0002] Since its invention, lithium-ion batteries have penetrated into all aspects of human life, such as transportation, power tools, electronic equipment, consumer products, and aerospace. However, with the accelerated pace of life, the charging time of the battery begins to become people's anxiety. In addition, the battery lithium precipitation caused by improper fast charging greatly affects the safety of the battery. Therefore, a safe and reliable fast charging strategy is a key research direction for the current development of lithium batteries. [0003] The fast charging performance of the battery is not only affected by the electrode material, but also factors such as the battery structure play a key role. It often takes several months from desig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44G01R31/388G01R31/389G01R31/392
CPCH01M10/44G01R31/388G01R31/389G01R31/392Y02E60/10
Inventor 娜仁王晓丹史海军周波
Owner TIANJIN LISHEN BATTERY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap