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Lead sealant film and non-aqueous electrolyte battery

A non-aqueous electrolyte and lead wire sealing technology, which is applied in the manufacture of non-aqueous electrolyte batteries, electrolyte batteries, batteries, etc., and can solve problems such as short circuits

Active Publication Date: 2008-08-13
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Or, when heat sealing is performed at a temperature and pressure exceeding the corresponding suitable temperature and pressure range, the surface of the metal foil exposed due to resin flow comes into contact with the electrode terminal, causing a short circuit

Method used

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  • Lead sealant film and non-aqueous electrolyte battery
  • Lead sealant film and non-aqueous electrolyte battery
  • Lead sealant film and non-aqueous electrolyte battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] A lead sealing film having a structure as shown in FIG. 9 was manufactured. 9 is a schematic cross-sectional view of an electrode terminal lead (negative terminal lead 3 or positive terminal lead 4 ) covered by two sealing films 61 , 62 and further heat-sealed by an outer package material 2 .

[0114] In this embodiment, a high melting point (melting point: 168°C) acid-modified polypropylene is set as the intermediate layers 61b, 62b to avoid short circuits, an Al bar or a Ni bar is set as the metal bar constituting the electrode terminal lead 3 or 4, and the Low melting point (melting point: 143°C) acid-modified polypropylene 61c, 62c is used for thermal bonding with the metal strip, and low melting point (melting point: 143°C) acid-modified polypropylene 61a, 62a is used for external packaging The inner layer (CPP layer) 23 of material 2 is thermally bonded, thereby forming a sealing film.

[0115] First, the metal strips (aluminum strips with a width of 4 mm and a t...

Embodiment 2

[0121] For the composition of the lead sealing film, a high melting point (melting point: 168° C.) acid-modified polypropylene is set as an intermediate layer to avoid short circuits, and a low melting point ( Melting point: 143° C.) Acid-modified polypropylene is provided on both sides of the intermediate layer, respectively.

[0122] For the outer packaging material, an aluminum laminated film having a nylon layer as an outer layer, an aluminum layer as a middle layer, and a CPP layer (melting point: 143° C.) as an inner layer was used.

[0123] Next, except for the above-mentioned film composition, substantially the same steps as in Example 1 were repeated to prepare the nonaqueous electrolyte battery of this example. The compositions of the lead sealing film and the outer packaging material film are shown in Table 1.

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Abstract

A lead sealant film and a non-aqueous electrolyte battery are provided. The lead sealant film includes a laminated structure composed of an inner layer, an intermediate layer, and an outer layer. The intermediate layer includes a first acid-modified polypropylene having a high melting-point, and each of the inner layer and the outer layer includes a second acid-modified polypropylene having a lowmelting-point. A difference between the melting point of the first acid-modified polypropylene and the melting point of the second acid-modified polypropylene is from 20 DEG C. to 25 DEG C.

Description

technical field [0001] The present invention relates to a lead sealant film and a nonaqueous electrolyte battery. More specifically, the present invention relates to improvements in a lead sealing film for sealing electrode terminal leads and a nonaqueous electrolyte battery using the lead sealing film. Background technique [0002] In recent years, various portable electronic devices, such as camera-integrated video tape recorders (VTRs), cellular phones, and portable computers, have been proliferated in reduced sizes and weights. As portable power sources for these electronic devices, batteries, especially secondary batteries, especially non-aqueous electrolyte secondary batteries (so-called lithium ion batteries) have been actively developed to obtain batteries that can be further reduced in thickness or bendable. [0003] For electrolytes for flexible batteries, solid electrolytes, especially gel electrolytes, which are plasticizer-containing solid electrolytes, and pol...

Claims

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Application Information

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IPC IPC(8): H01M2/06H01M2/08H01M2/30H01M10/40C09J7/02C09J123/26H01M10/05H01M10/0585H01M10/0587H01M50/55H01M50/557
CPCH01M10/05H01M10/0525H01M10/058H01M2010/0495H01M2200/106Y02E60/10H01M50/557Y02P70/50H01M50/55H01M50/183
Inventor 山田弘幸
Owner MURATA MFG CO LTD
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