Electrochemical cell, portable electronic device and method for manufacturing electrochemical cell

An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve problems such as the inability to curl the shell and seal, and achieve the effects of shortening welding time, improving reliability, and high reliability

Inactive Publication Date: 2012-01-04
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlike the coin-shaped electrochemical cell, the quadrangular electrochemical cell cannot be sealed by crimping the case

Method used

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  • Electrochemical cell, portable electronic device and method for manufacturing electrochemical cell
  • Electrochemical cell, portable electronic device and method for manufacturing electrochemical cell
  • Electrochemical cell, portable electronic device and method for manufacturing electrochemical cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] use figure 1 Example 1 was produced for the storage container shown. The concave container 101 is made of alumina and has a size of 3.2×2.5×0.9 mm. The depression depth of the concave portion was 0.4 mm, and the size thereof was 2.4×1.7 mm. The surface of the tungsten layer was plated with gold to form connection terminal A, connection terminal B, and a current collector. As the sealing plate 102, a nickel plating layer containing 3% by mass of phosphorus was formed on a Kovar plate with a thickness of 0.1 mm to a thickness of approximately 5 μm. As the metal ring 109 of the concave container 101, a ring obtained by forming a nickel plating layer containing 3% by mass of phosphorus to a thickness of about 5 μm was used.

[0064] The active material is used in activated carbon (the specific surface area is 2260m 2 / g) is a sheet obtained by adding carbon black as a conductive agent and using a Teflon (registered trademark) adhesive as an adhesive. This sheet is cut ...

Embodiment 2

[0067]Example 2 was prepared by setting the phosphorus content of the nickel plating layer disposed on both the metal ring 109 and the sealing plate 102 to 5% by mass. Other manufacturing conditions are the same as in Example 1.

Embodiment 3

[0069] Example 3 was prepared by setting the phosphorus content of the nickel plating layer disposed on both the metal ring 109 and the sealing plate 102 to 8% by mass. Other manufacturing conditions are the same as in Example 1.

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Abstract

An electrochemical cell has an electrolytic solution therein and is formed by welding a container (101) having a recessed shape and a sealing plate (102). On the corresponding surface of a metal ring on the upper end surface of the container and that of the sealing plate, nickel plating layers are formed. Cracks are prevented from being generated in the recessed container (101) while the welding is performed, by having the both of or one of the nickel plating layers contain phosphorus.

Description

technical field [0001] The present invention relates to electrochemical cells such as nonaqueous electrolyte cells and electric double layer capacitors. Background technique [0002] In recent years, demands for miniaturization and thinning of electrochemical cells have intensified. This is because electronic devices equipped with electrochemical cells are miniaturized. Moreover, when mounting these electrochemical cells, most of them use the reflow soldering method (a method of disposing an electrochemical cell coated with solder paste on a mounting substrate, heating each circuit board and performing soldering), and the electrochemical cell is required to be able to withstand Heat resistance to reflow soldering temperature. [0003] Existing electrochemical cells are in the shape of a coin to allow caulking of the battery can. Since it is in the shape of a coin, the mounting area cannot be effectively used, which hinders space saving. In addition, when reflow soldering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01G9/155H01M2/02H01M2/06H01M2/26H01M2/30H01M6/16H01M10/0569H01M10/0585H01G11/00H01G11/22H01G11/38H01G11/42H01G11/54H01G11/60H01G11/62H01G11/78H01G11/80H01G11/82H01M50/117H01M50/119
CPCH01M2/0257H01G9/10H01M2300/0045H01M2/0277Y02E60/13H01G9/155H01M2/0426Y02E60/10H01M50/169Y02P70/50H01G11/08H01G11/78H01G11/80H01G11/74H01M50/117H01M50/119
Inventor 渡边俊二植竹宏明菅原量白川纯玉地恒昭
Owner SEIKO INSTR INC
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