Capacity-grading and set-matching method of lithium ion battery
A technology for lithium-ion batteries and single-cell batteries, applied in the field of lithium-ion batteries, can solve the problems of voltage difference consistency, affecting the service life of the battery, and not considering the internal resistance polarization of the single-cell battery, so as to improve the consistency and improve the use. effect of life
Active Publication Date: 2014-12-17
北京创元万威能源科技有限公司
View PDF6 Cites 25 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to overcome the problem that the existing lithium-ion battery grouping method does not consider that the internal resistance polarization of the single battery is easy to occur under high current discharge, and the single battery of the same capacity cannot be fully charged and discharged at the same time,
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Example Embodiment
[0025] Embodiment: A method for dividing capacity and grouping of lithium-ion batteries in this embodiment, such as figure 1 As shown, including the following steps:
[0026] S1: Detect the internal resistance of each single battery, and divide the single battery into several files according to the internal resistance of the single battery;
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
Login to view more
Abstract
The invention discloses a capacity-grading and set-matching method of a lithium ion battery. The method includes following steps: S1: detecting internal resistance of each single battery cell and dividing the single battery cells into a plurality of grades according to the internal resistances of the single battery cells; S2: respectively detecting each grade of the single battery cells and classifying each grade of the single battery cells; and S3: performing a set-matching operation to the single battery cells in same grade and same classification according to a cut-off voltage. By means of the method, consistency of a voltage difference during heavy-current discharge of the single battery cells which are matched in one set can be increased, thereby prolonging a service life of a set-matched battery.
Description
technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for distributing and grouping lithium-ion batteries. Background technique [0002] Due to the deviation of consistency in the production of lithium-ion batteries, it is necessary to combine single batteries with similar performance. If the combination is not done properly, the life of the entire battery will be reduced, and even safety accidents such as explosions and fires will occur. . However, in the prior art, the batteries are generally grouped based on parameters such as the capacity of the single battery, static internal resistance, open circuit voltage, discharge platform time, and charge and discharge efficiency. However, this method has the following disadvantages: it is separated from the actual use of the single battery, and the single battery will usually discharge at a rate of 1C, 2C or even greater during use. Due to internal resist...
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
Login to view more
IPC IPC(8): H01M10/42H01M10/44G01R31/36
CPCH01M10/4207H01M10/4285Y02E60/10
Inventor 潘健健孙延先宋泽斌王玉龙刘启凯
Owner 北京创元万威能源科技有限公司
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
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