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Battery

A battery and electrolyte technology, applied in the direction of lithium batteries, secondary batteries, circuits, etc., can solve the problem of difficult to make thin-film batteries, etc., and achieve the effect of inhibiting capacity decline and inhibiting expansion

Inactive Publication Date: 2006-03-08
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a metal container is used as an external member, it is difficult to fabricate a sheet battery that is thin and has a large area, a card battery that is thin and has a small area, a battery that is flexible and has a shape with a high degree of freedom, etc.

Method used

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no. 1 approach

[0023] figure 1 An exploded perspective view showing a secondary battery according to a first embodiment of the present invention. The secondary battery comprises a wound electrode body 20 to which a positive terminal 11 and a negative terminal 12 are connected within a film outer element 30 .

[0024] The positive terminal 11 and the negative terminal 12 respectively lead from the inside to the outside of the outer element 30 , and for example each lead out in the same direction. The positive terminal 11 and the negative terminal 12 are respectively made of metal materials such as aluminum (Al), copper (Cu), nickel (Ni) and stainless steel, and are respectively in the shape of a sheet or a mesh.

[0025] The outer member 30 is made of rectangular laminated films in which, for example, nylon film, aluminum foil and polyethylene film are bonded together in this order. For example, the outer member 30 is arranged such that the polyethylene film side and the wound electrode bod...

no. 2 approach

[0071] The secondary battery according to the second embodiment of the present invention has the structure, performance and effect similar to those of the first embodiment, except that a secondary battery having a structure in which at least one selected from polyvinyl acetal and its derivatives is polymerized is used. High molecular weight compounds are not used as supports.

[0072] Polyvinyl acetal is to comprise the constituent unit that contains the acetal group represented by chemical formula 3 (1), the constituent unit that contains the hydroxyl group represented by chemical formula 3 (2) and the constituent unit that contains the acetyl group represented by chemical formula 3 (3) as repeated unit compound. Specifically, for example, polyvinyl formal whose R represented by Chemical Formula 3(1) is hydrogen, and polyvinyl butyral whose R represented by Chemical Formula 3(1) is a propyl group are cited.

[0073] chemical formula 3

[0074]

[0075] In the formula, R ...

no. 3 approach

[0080] The secondary battery according to the third embodiment of the present invention has a structure, performance and effect similar to those of the first embodiment, except that the electrolyte is a liquid electrolytic solution not containing a support, and this electrolytic solution is impregnated in the separator 23 . The composition of the electrolytic solution is similar to that of the first embodiment.

[0081] A secondary battery can be manufactured as in the first embodiment, except that an electrolytic solution is injected instead of a composition of substances for an electrolyte.

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Abstract

A battery capable of inhibiting decrease in capacity and inhibiting swollenness even in hot environment is provided. A battery comprises a cathode, an anode and an electrolyte inside a film exterior member. The electrolytic solution contains carboxylate ester or ketone, in which a third alkyl group is directly bonded to a carbonyl group. Thereby, decomposition reaction of the solvent in the cathode is inhibited.

Description

[0001] Cross References to Related Applications [0002] This disclosure contains subject matter related to Japanese Patent Application JP 2004-213631 filed with the Japan Patent Office on July 21, 2004 and Japanese Patent Application JP 2005-184993 filed with the Japan Patent Office on June 24, 2005, the entire contents of which are herein Incorporated by reference. technical field [0003] The present invention relates to a battery comprising a positive electrode, a negative electrode and an electrolyte within a thin film outer element. Background technique [0004] In recent years, many portable electronic devices such as notebook personal computers, combined cameras (video tape recorders) and mobile phones have entered people's lives one after another. Miniaturization and weight reduction of these devices have been carried out. Along with these circumstances, secondary batteries as portable power sources have also attracted public attention, and active research has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/052H01M10/0568H01M10/0569
CPCY02E60/122H01M10/0569H01M10/0565H01M10/0525H01M10/052H01M10/0587Y02E60/10
Inventor 足立百惠藤田茂川岛敦道
Owner SONY CORP
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