Secondary battery cell and method of manufacturing the same
A technology of secondary battery and manufacturing method, applied in secondary battery manufacturing, secondary battery, lithium storage battery, etc., can solve the problems of discharge capacity deviation, reliability reduction, battery short circuit, etc.
Inactive Publication Date: 2011-11-09
HITACHI AUTOMOTIVE SYST LTD
View PDF9 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Damage to the separator will directly lead to internal short circuit of the battery, etc., reducing reliability
[0008] In addition, in order to avoid the cutting of the positive electrode lead and the negative electrode lead, if only the length of the positive electrode and the negative electrode is set to be greater than or equal to the specified value, because the deviation in the area of the positive electrode and the negative electrode will cause a problem in the characteristics such as discharge capacity. Therefore, for example, it is not ideal in the case of combining multiple secondary batteries to form a system such as for vehicles
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
no. 1 Embodiment approach
[0025] Structure of Cylindrical Secondary Battery
[0026] Hereinafter, the cylindrical secondary battery of the present invention will be described with reference to the drawings, taking the lithium ion cylindrical secondary battery as an embodiment.
[0027] figure 1 is a cross-sectional view showing an embodiment of the cylindrical secondary battery of the present invention, figure 2 yes figure 1 An exploded perspective view of the cylindrical secondary battery shown.
[0028] Cylindrical secondary battery 1 has, for example, an outer shape The size of height 100mm.
[0029] In this cylindrical secondary battery 1 , components for power generation described below are accommodated inside a bottomed cylindrical battery container 2 and a cap-shaped upper cover 3 . In the bottomed cylindrical battery container 2, a groove 2a protruding inwardly of the battery container 2 is formed on the upper end side which is the open side.
[0030]10 is an electrode group, which ha...
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
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a secondary battery cell and a method of manufacturing the same. In a secondary battery cell including an electrode group that is manufactured by winding a positive electrode having a plurality of positive leads and a negative electrode having a plurality of negative leads, the lengths of the positive electrode and the negative electrode are respectively longer than the length satisfying the rated power generating capacity of the secondary battery cell and are cut not upon a positive lead and not upon negative lead, respectively.
Description
[0001] This application enjoys the priority of Japanese Patent Application No. 2010-106538 filed on May 6, 2010, and the entire content of this patent application is cited in this application. technical field [0002] The present invention relates to a secondary battery and a manufacturing method thereof. Background technique [0003] In a cylindrical secondary battery represented by a lithium secondary battery, etc., a positive electrode with a positive electrode mixture layer and a negative electrode with a negative electrode mixture layer are wound around the axis via a separator. electrode group. Positive electrode mixture layers are formed on both sides of the positive electrode plate, and one side edge along the longitudinal direction of the positive electrode plate is used as the positive electrode mixture untreated portion where the positive electrode mixture layer is not formed. On the untreated part of the positive electrode mixture, in order to weld the positive ...
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 Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/04H01M4/02H01M4/13H01M10/0587H01M50/534H01M50/536H01M50/538
CPCH01M10/0587H01M2/263H01M10/0431H01M10/052Y02E60/122Y02E60/12Y02T10/7011Y10T29/49108Y02E60/10H01M50/538Y02P70/50H01M50/536H01M50/534
Inventor 破户裕树七海毅铃木克典
Owner HITACHI AUTOMOTIVE SYST LTD