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Electrochemical cell and method of manufacturing electrochemical cell

An electrochemical and battery technology, applied in the direction of secondary battery manufacturing, large-size batteries/battery packs, cylindrical shell batteries/batteries, etc., can solve the problems of low electrical reliability, achieve electrical reliability and simplify the structure , The effect of reducing the number of manufacturing man-hours

Active Publication Date: 2016-05-25
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the structure of the above-mentioned Patent Document 1, the positive electrode side container and the negative electrode side container are electrically connected to the positive electrode and the negative electrode only at each protruding part, so there is a problem of low electrical reliability.

Method used

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  • Electrochemical cell and method of manufacturing electrochemical cell
  • Electrochemical cell and method of manufacturing electrochemical cell
  • Electrochemical cell and method of manufacturing electrochemical cell

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no. 1 Embodiment approach ）

[0051] [Secondary battery]

[0052] figure 1 It is a sectional view of the secondary battery 1 in the first embodiment.

[0053] Such as figure 1As shown, the secondary battery 1 of the present embodiment is a so-called button-type secondary battery 1 and includes: an outer package 2; and an electrode group 3 housed in the outer package 2 together with an electrolytic solution. In addition, the electrolytic solution dissolves the supporting electrolyte in a non-aqueous solvent.

[0054] The outer package 2 has a circular shape in plan view. Specifically, the outer packaging body 2 has: a bottomed cylindrical positive electrode container 11 ; and a top tube that is attached to the positive electrode container 11 via a gasket 12 and defines a storage space S between the positive electrode container 11 and the positive electrode container 11 . Shaped negative side container 13 . In the illustrated example, the respective center axes of the positive electrode side container 1...

no. 2 Embodiment approach ）

[0085] Next, a second embodiment of the present invention will be described. In this embodiment, the separator 100 is different from the above-described first embodiment in that the separator 100 has the negative electrode covering portion 112 covering the end surface of the negative electrode 22 on the positive electrode protruding portion 27 side. In addition, in the following description, the same code|symbol is attached|subjected to the structure similar to the above-mentioned embodiment, and description is abbreviate|omitted.

[0086] Image 6 It is a sectional view of the secondary battery 101 in the second embodiment.

[0087] Image 6 In the shown secondary battery 101, the separator 100 of the electrode group 103 has: a first overlapping portion 110 and a second overlapping portion 111 arranged on both sides in the radial direction relative to the negative electrode 22; The lower end portions of , 111 are mutually, and the negative electrode covering portion 112 co...

no. 3 Embodiment approach ）

[0092] Next, a third embodiment of the present invention will be described. In the present embodiment, the separator 200 is different from the above-described embodiment in that the separator 200 has the positive electrode covering portion 212 covering the end surface of the positive electrode 21 on the negative electrode protrusion 34 side. In addition, in the following description, the same code|symbol is attached|subjected to the structure similar to the above-mentioned embodiment, and description is abbreviate|omitted.

[0093] Figure 8 It is a sectional view of the secondary battery 201 in the third embodiment.

[0094] Figure 8 In the shown secondary battery 201, the separator 200 of the electrode group 203 has: the above-mentioned first bonding portion 110, the second bonding portion 111, and the negative electrode coating portion 112; The third overlapping portion 210 arranged radially outward of the positive electrode 21 located on the outer periphery; and the po...

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Abstract

The invention provides an electrochemical cell and a method of manufacturing the electrochemical cell capable of securing the electric reliability while simplifying the structure and reducing manufacturing man-hours and costs. The electrochemical cell includes an electrode group in which a positive electrode and a negative electrode are overlapped through a separator, a positive electrode container to which a positive electrode projecting portion of the positive electrode which projects from an overlapping portion with respect to the negative electrode is electrically connected and a negative electrode container to which a negative electrode projecting portion of the negative electrode which projects from the overlapping portion is electrically connected as well as demarcating a housing space which houses the electrode group with the positive electrode container, in which a conductive material containing a carbon-based material is interposed between the positive electrode projecting portion and the positive electrode container.

Description

technical field [0001] The present invention relates to an electrochemical cell (cell) and a method for manufacturing the electrochemical cell. Background technique [0002] Conventionally, as an electrochemical cell such as a non-aqueous electrolyte secondary battery or an electric double-layer capacitor, it is known to include an electrode group in which sheet-shaped positive and negative electrodes are wound with separators interposed therebetween, and an outer package for accommodating the electrode group. Structure. For example, in the electrochemical cell shown in the following Patent Document 1, the positive electrode protruding portion protruding from the overlapping portion of the positive electrode with the negative electrode is connected to the positive electrode side container of the outer package, and the protruding portion of the negative electrode protrudes from the overlapping portion with the positive electrode. The negative electrode protruding part of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/06H01G11/78H01G11/82H01M50/103H01M50/109H01M50/119H01M50/534
CPCH01G11/78H01G11/82H01M50/109H01M50/119H01M50/534H01M50/103H01M10/0427H01M10/0459H01G11/26H01G11/70H01G11/74Y02E60/10H01M50/1243H01M50/153Y02P70/50H01M10/0525H01M4/625Y02E60/13
Inventor 渡边俊二田中和美玉地恒昭
Owner SEIKO INSTR INC