Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Matching method of lithium-ion power battery

A power battery, lithium-ion technology, applied in the field of lithium-ion power batteries, can solve the problems of the battery charge and discharge performance cannot be well detected and sorted, the overall performance of the battery pack is poor, and the test conditions are single.

Inactive Publication Date: 2017-01-04
OPTIMUM BATTERY CO LTD
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the existing technology are: the test conditions are single, most of them only detect the static data of the battery, and the charging and discharging performance of the battery in the actual use process cannot be well detected and sorted
As a result, after being used in groups, the overall performance of the battery pack is poor

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
  • Matching method of lithium-ion power battery
  • Matching method of lithium-ion power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0016] The present invention provides a lithium-ion power battery assembly method, comprising the following steps:

[0017] Step 1. Select the battery whose voltage and internal resistance are within the acceptable range;

[0018] Step 2. Carry out a charge and discharge test on the battery in step (1), and select the battery within the range according to the specified capacity range;

[0019] Step 3, carrying out the polynomial fitting of the charging and discharging time-voltage curve of the battery selected in step (2), the polynomial is expressed as:

[0020] y=ax 6 +bx 5 +cx 4 +dx 3 +ex 2 +fx;

[0021] Step 4. Comparing the coefficients of the fitting equations obtained in step (3), selecting batteries with fitting coefficients within a certain range, and grouping them.

[0022] As a further improvement of the above-mentioned embodiment, the values ​​of t...

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

No PUM Login to View More

Abstract

The invention discloses a matching method of a lithium-ion power battery, and relates to a lithium-ion power battery. According to the method, the difference between to-be-matched battery cells can be fully reflected, and the quality of battery matching and the overall performance of a matched battery pack are improved. The matching method comprises: measuring voltage and internal resistance of to-be-matched battery cells in an uncharged state, and selecting the to-be-matched battery cells in an acceptability limit; performing a charging and discharging test for the qualified battery cells, and selecting the battery cells with the capacity in a designated range; and performing polynomial fitting of mathematical simulation to the obtained charging and discharging curves of the battery cells with qualified capacity, comparing coefficients of a fitted equation, and selecting the battery cells with fitting coefficients in a certain range for grading and matching. The method is used for matching of a lithium-ion power battery.

Description

[0001] 【Technical field】 [0002] The invention relates to lithium-ion power batteries, in particular to a lithium-ion power battery matching method. [0003] 【Background technique】 [0004] As the advantages of lithium-ion secondary batteries become more and more obvious, their application range is also becoming wider and wider. Recently, the use of new energy vehicles has become more and more common. As the power battery pack of new energy vehicles, it is often composed of dozens to hundreds of single batteries. To ensure the normal performance of the capacity and cycle life of the battery pack, other The single cells that make up the battery pack must be consistent in parameters such as resistance, capacity, platform time, and self-discharge. Due to various reasons such as the structural components and manufacturing process of lithium-ion power batteries, the consistency of single-cell lithium-ion batteries produced in large quantities is not good enough. Therefore, after ...

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): H01M10/42
CPCH01M10/4207H01M10/4221Y02E60/10
Inventor 李晶李文明吴超钱龙饶睦敏李瑶
Owner OPTIMUM BATTERY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com