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Non aqueous electrolyte secondary batteries

A non-aqueous electrolyte and secondary battery technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of high manufacturing cost and a lot of time, and achieve the effect of improving current collection efficiency

Inactive Publication Date: 2010-09-01
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it involves a problem that it takes a lot of time to manufacture positive and negative electrodes, resulting in high manufacturing cost

Method used

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  • Non aqueous electrolyte secondary batteries
  • Non aqueous electrolyte secondary batteries
  • Non aqueous electrolyte secondary batteries

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0037] Such as Figure 1 ~ Figure 2 As shown, the nonaqueous electrolyte secondary battery 10 according to the first embodiment has a battery element 11 in which a first positive electrode 12A, a second positive electrode 12B, and a negative electrode 13 are wound in a stacked state through a separator 14; a positive electrode terminal 15 is connected to positive electrode 12A; negative terminal 16 connected to negative electrode 13; top insulator 17 supporting positive terminal 15 and negative terminal 16 and connected to one end face of battery element 11 ( figure 1 and the bottom insulator 18, and the other end surface of the battery element 11 ( figure 1 Opposite to the right-hand side in ), the battery element 11 is sealed by a cylindrical laminate package (not shown).

[0038] Such as image 3 As shown, in each of the first positive electrode 12A and the second positive electrode 12B, the positive electrode active material layer 22 is uniformly coated on one surface of...

no. 2 approach

[0060] in such as Figure 7 ~ Figure 8 In the non-aqueous electrolyte secondary battery 50 in the illustrated second embodiment, the contact piece 52 is provided at the end 51A of the negative terminal 51 .

[0061] The contact piece 52 extends in the thickness direction of the negative terminal 51 and has a cylindrical shape having a tapered tip portion 52A. The length of the contact sheet 52 in the longitudinal direction is the length extending across the multilayer edge 13A which is stacked based on the winding of the negative electrode 13 .

[0062] In this nonaqueous electrolyte secondary battery 50 , the contact piece 52 of the negative terminal 51 generally penetrates the edge 13A of the negative terminal 51 in the thickness direction.

[0063] Under this condition, a through hole as a division 53 is formed in the edge 13A of the negative electrode 13 through the contact piece 52 , and the negative electrode current collector (copper foil) 24 of the negative electrode ...

no. 3 approach

[0067] in such as Figure 9 In the non-aqueous electrolyte secondary battery of the third embodiment shown, a pair of contact pieces 61 and 62 are provided at the positions of the pair of contact pieces 31 of the first embodiment, and other configurations are the same as those of the non-aqueous electrolyte secondary battery in the first embodiment. The electrolyte secondary battery 10 is the same.

[0068] In the contact piece 61 , the lower side 61A is formed with an ascending gradient from the end portion 16A toward the distal direction; in the contact piece 62 , the lower side 61A is formed with an ascending gradient toward the proximal direction of the end portion 16A.

[0069] Such as Figure 10 As shown, in the negative electrode terminal 60, when the negative electrode 13 is divided by the contact pieces 61 and 62 from the edge 13A along the plane direction of the negative electrode 13, the lower side 61A of the contact surface 61 can be along the Figure 10 to guide...

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Abstract

A non-aqueous electrolyte secondary battery is provided, including a battery element in which a positive electrode having a positive electrode active material layer provided on a positive electrode collector and a negative electrode having a negative electrode active material layer provided on a negative electrode collector are stacked via a separator, and an edge of the negative electrode is disposed so as to protrude along the planar direction relative to an edge of the positive electrode. A positive electrode terminal is connected to the positive electrode, and a negative electrode terminal is connected to the negative electrode. The negative electrode terminal has a contact piece intersecting with the continuous direction of the edge of the negative electrode and intersecting with theplanar direction of the negative electrode. The contact piece comprehensively cleaves and contacts a plurality of the edges of the negative electrode.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2007-211892 filed in the Japan Patent Office on Aug. 15, 2007, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a nonaqueous electrolyte secondary battery having a battery element including a positive electrode and a negative electrode stacked through a separator, wherein the positive electrode terminal is connected to the positive electrode and the negative electrode terminal is connected to the negative electrode. [0004] Specifically, the present invention relates to a nonaqueous electrolyte secondary battery using a nonaqueous electrolyte and having battery elements such as a laminated lithium ion battery, a rectangular lithium ion battery, and a cylindrical lithium ion battery in a wound structure or a stacked structure. Background technique [0005] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/20H01M2/02H01M10/40H01M4/13H01M10/058H01M10/0587H01M50/463
CPCY02E60/12H01M2/14H01M10/0585Y02E60/122H01M2/18Y02E60/10H01M50/463Y02P70/50
Inventor 高木良介铃木浩之井本浩
Owner SONY CORP
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