Unlock instant, AI-driven research and patent intelligence for your innovation.

Coin-shape cell

A coin-shaped, battery technology, applied in battery pack components, circuits, electrical components, etc., can solve problems such as poor appearance, reduced manufacturing costs, rust on sealing plates and outer cans, and achieves suppression of rust and leakage. The effect of productivity improvement and cost reduction

Active Publication Date: 2010-05-19
MAXELL HLDG LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since such a Ni-plated steel sheet is cheaper than stainless steel, it is possible to reduce the manufacturing cost by replacing the raw materials of the sealing plate and the outer can with the above-mentioned Ni-plated steel sheet for the coin-shaped battery.
[0007] However, according to the studies of the inventors of the present invention, it has been clarified that if the Ni-plated steel sheet disclosed in Patent Document 1 is used for the sealing plate and the outer can of the coin-shaped battery, these sealing plates and the outer can will rust and cause appearance defects. problems, or leakage occurs

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
  • Coin-shape cell
  • Coin-shape cell
  • Coin-shape cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In producing the coin-shaped battery of Example 1, the following exterior can 3, sealing plate 2, annular gasket 4, positive electrode 7, negative electrode 5, separator 6, and electrolytic solution were used. First, as the outer can 3, a stainless steel plate with a thickness of 200 μm and a nickel-plated layer with a thickness of 3 μm was formed by drawing into a bottomed cylindrical member with a peripheral wall height of 3 mm.

[0056] The sealing plate 2 is a cold-rolled steel sheet (steel sheet) with a thickness of 250 μm to which a 3 μm matte Ni plating layer is applied by heat treatment to form a Fe-Ni diffusion region, and formed into a shape having a bent portion 2 b. Here, the heat treatment was performed at 780° C. for 60 seconds using a continuous annealing method.

[0057] In addition, as the shape of the curved portion of the sealing plate 2, the radius of curvature R is 0.6 mm, and the inner angle θ of the curved portion is 78°. At this time, R / θ was 0....

Embodiment 2

[0063] A coin-shaped battery was produced in the same manner as in Example 1, except that the curvature radius R of the sealing plate 2 was set at 0.6 mm and the inner angle θ of the bent portion was 60°. In addition, R / θ of the bent portion of the sealing plate 2 was 0.0100.

Embodiment 3

[0065] A coin-shaped battery was produced in the same manner as in Example 1, except that the curvature radius R of the sealing plate 2 was set at 0.55 mm and the inner angle θ of the bent portion was 84°. In addition, R / θ of the bent portion of the sealing plate 2 was 0.0065.

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a coin-shipped battery comprising sealing plate taking armor plate as constitution material, and capable of restraining rustiness on outer surface and liquid leakage. The coin-shipped battery is formed by clamping sealing pad between sealing plate having upper wall and bending section bending downwards from the upper wall and port section of outer can, and sealing with rivet bond, the coin-shipped battery is characterized in that said sealing plate is composed at least with armor plate plated with Ni, wherein armor substrate is plated with Ni on outer surface anda zone having Fe and Ni inter diffusion between the Ni plated section and the armor substrate section, the curvature radii of bending section of said sealing plate has a ratio of R / theta between 0.0060 and 0.0160 with a inner angle theta of the bending section.

Description

technical field [0001] The present invention relates to a coin-shaped battery, and more specifically, to a coin-shaped battery having excellent corrosion resistance of a battery can during long-term storage. Background technique [0002] Coin-shaped batteries represented by manganese dioxide-lithium batteries generally use stainless steel plates for sealing plates and external cans. Due to the high strength of the stainless steel plate, the strength can be ensured even if the thickness of the sealing plate and the outer can is thin, and problems such as liquid leakage and battery deformation are less likely to occur, so it is ideal for achieving high capacity while suppressing such problems. [0003] In addition, when a coin-shaped battery is used as a power source of an electronic device, etc., the terminal provided in the electronic device and the sealing plate or the outer can of the battery sometimes need to be energized through point contact, so in order to reduce the c...

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 Patents(China)
IPC IPC(8): H01M2/02
CPCY02E60/10
Inventor 山口浩司木村孝史佐野健一
Owner MAXELL HLDG LTD