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

Balance method of battery capacity of secondary battery group

A technology of battery capacity and equalization method, which is applied in the repair/maintenance of secondary batteries, battery pack components, circuits, etc., can solve problems such as damaged batteries, battery damage, etc., to achieve the effect of improving service life and reducing replacement costs.

Inactive Publication Date: 2010-06-02
ZHEJIANG LUYUAN ELECTRIC VEHICLE
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain inadequacies in both of these schemes. For the former battery pack balancing scheme, if a single battery (i, j) (Note: (i, j) represents the i-th row, j-th column of the battery ) capacity decline, it will cause all the batteries except the j column to charge the j column with unlimited current. In severe cases, this unlimited current charging will cause all the batteries in this road to be damaged; the latter battery pack equalization scheme, also There is also the same problem as the previous solution. If the capacity of the battery (i, j) decreases, it will cause all the batteries in the i-th row to charge the battery with unlimited current. In severe cases, the battery will be damaged. At the same time, the battery (( i+1, j) will also have a similar situation, resulting in a chain reaction, so that all batteries in the j-th column after the i-th row (including the i-th row) will be damaged

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
  • Balance method of battery capacity of secondary battery group
  • Balance method of battery capacity of secondary battery group
  • Balance method of battery capacity of secondary battery group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] like figure 1 As shown, the traditional way of connecting secondary batteries in series first and then in parallel, the total capacity of the secondary batteries is:

[0025] C 总 =min(C11, C21,..., Cm1)+min(C12, C22,...,Cm2)+...+min(C1n, C2n,.... .., Cmn)

[0026] In the above formula: Cij (i=1, 2, ..., m; j = 1, 2, ..., n) is the apparent capacity of the battery (i, j) (ie the actual capacity of the battery).

[0027] If the capacity of a single battery (i, j) (Note: (i, j) represents the battery in the i-th row and j-th column) decreases, all the batteries except the j-th column will flow to the j-th column without limit Charging, this kind of unlimited charging will cause all the batteries in this way to be damaged in severe cases.

[0028] like figure 2 As shown, in the traditional parallel first and then serial secondary battery connection method, the total capacity of the secondary battery pack is:

[0029] C 总 =min{(C11+C12+,...,+C1n),(C21+C22+,...,+C2n),...

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 relates to the technical field of secondary batteries, in particular to a balance method of the battery capacity of a secondary battery group, characterized in that a balance resistor network is adopted, and the balance resistor network is formed by using same resistors to connect the battery nodes in the secondary battery group and can adopt a common connection mode, a star connection mode or a triangular connection mode. The invention effectively balances the battery capacity of the secondary battery group, prolongs the service life of the battery group and decreases the replacement cost of storage batteries.

Description

technical field [0001] The invention belongs to secondary battery pack technology, in particular to a battery capacity equalization method of a secondary battery pack that is unbalanced in capacity due to differences in single cells. Background technique [0002] Based on the current power battery technology and manufacturing process level, the performance difference between battery cells exists objectively throughout its life cycle, which leads to the unbalanced capacity of one or several batteries in the secondary battery pack. Affect the performance of the entire battery pack, and in severe cases may cause the entire battery pack to collapse. Therefore, we urgently need to balance the individual battery cells in the battery pack. At present, there are two kinds of equalization measures, one is to directly connect individual batteries in series first and then connect them in parallel; the other is to first connect individual batteries in parallel and then in series. There...

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
IPC IPC(8): H01M10/42H01M2/20H01M50/502
CPCY02E60/12Y02E60/10
Inventor 倪捷胡继红陈文胜张芳勇
Owner ZHEJIANG LUYUAN ELECTRIC VEHICLE
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