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External body for electrochemical devices

A technology for electrochemical components and chemical components, applied in electrical components, battery pack parts, battery boxes/jackets, etc., can solve the problems of reduced production efficiency, complicated safety valve structure, complicated battery structure, etc., to reduce the number of components Effect

Active Publication Date: 2014-06-11
株式会社乐索纳克包装
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since the structure of the safety valve in this document is complicated, the structure of the battery itself is complicated, and there is a possibility that the production efficiency may decrease.

Method used

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  • External body for electrochemical devices
  • External body for electrochemical devices
  • External body for electrochemical devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099]As the exterior film 11 constituting the exterior body 1 , a three-layer laminate with a thickness of 0.1 mm was prepared in which the sealant layer was made of stretched polypropylene, the middle layer was made of aluminum foil, and the outer layer was made of nylon 6. The size of the exterior film 11 is 100 mm in length and 100 mm in width.

[0100] As the porous metal sheet 21 constituting the safety valve 2 , a porous nickel (Ni) sheet produced by electrolysis was prepared. The sheet had a thickness of 0.05 mm, a length of 30 mm, and a width of 30 mm. And the film is 100 / cm 2 The density formed has a diameter porous sheet with fine pores.

[0101] As the polyolefin-based adhesive (PP adhesive) 31, a composition of 100:1.5 of hot-melt adhesive "Aronmelt (trademark) PPET-1600" manufactured by Toagosei Co., Ltd. and hexamethylene diisocyanate was prepared. Blended adhesive.

[0102] And, on both sides of the porous Ni sheet 21 (adhesion surface with the exterior f...

Embodiment 2

[0117] In the same manner as in Example 1, after the exterior film 11 and the porous Ni sheet 21 were bonded together, as shown in Table 1, the PP adhesive 31 was aged to obtain an exterior body 1, which was used as a sample of Example 2. The aging conditions are: pressure 0.1MPa-0.3MPa, temperature 30°C-50°C, time 2-9 days.

[0118] The sample (exterior body 1) of Example 2 thus obtained was evaluated in the same manner as in Example 1 above for initial adhesiveness, sealing performance, and adhesiveness after storage. The results are shown in Table 2.

Embodiment 3

[0120] As the modified polyolefin film 32, the following adhesive film was prepared: a block of hot-melt adhesive "Aronmelt (trademark) PPET2102" manufactured by Toagosei Co., Ltd. The obtained plate (thickness 2mm) was sandwiched, heated and melted with a hot press at 190° C. for 1 minute, degassed, pressed at 3 MPa, and cooled to obtain an adhesive film with a thickness of 105 μm.

[0121] And, to both sides of the porous Ni sheet 21 as the safety valve 2 (adhesive surfaces with the exterior films 11, 11), the modified polyolefin film 32 is welded by thermal bonding (refer to Figure 5 ). The conditions of the thermal welding are: the temperature is 150° C. to 200° C., the pressure is 0.1 MPa to 0.3 MPa, and the time is 2 to 5 seconds.

[0122] In this way, the porous Ni sheet 21 on which the modified polyolefin film 32 is welded is sandwiched by the peripheral parts (one side) of the two outer membranes 11, 11 from both sides, and the outer membranes 11, 11 are overlapped....

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Abstract

The invention provides a laminated-type external body for electrochemical devices, and a porous metal sheet as a safety valve can be installed in sufficient strength. The laminated-type external body for electrochemical devices is taken as an object, two external films (11) composed of high-molecular compounds are stacked to make two single-face-side sealant layers be oppositely arranged, and the periphery parts of the stacked external films (11) are sealed. On end of a safety valve (2) which is formed by a porous metal sheet (21) and can prevent the rise of internal pressure is arranged in the interior of the external body, and the other end is arranged outside the external body. The safety valve (2) is clamped between the periphery parts corresponding to the stacked external films (11), and the safety valve (2) is fixed on the sealant layers of the external films (11) through a bonding layer containing high-molecular compounds.

Description

technical field [0001] The present invention relates to a lithium battery, a lithium ion capacitor, and a laminated type electrochemical element exterior body equipped with a safety valve for preventing an internal pressure increase, and related technologies, wherein the safety valve for preventing an internal pressure increase is used for use. The gas generated inside is released to the outside. Background technique [0002] In the past, in electronic equipment such as video cameras, notebook computers, tablet personal computers, mobile phones, and multi-function mobile phones, there has been a strong desire for portability, miniaturization and light weight. There is also a strong demand for small, light, high-performance lithium secondary batteries used in batteries for advanced use. [0003] In addition, recently, studies have been conducted on increasing the size of the lithium secondary battery in order to apply the lithium secondary battery to an on-vehicle power supp...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M2/08H01M2/12H01G11/78H01G11/80
CPCH01G11/78H01G11/80H01M50/124H01M50/183H01M50/317Y02E60/10B32B15/08B32B37/12B32B2457/10H01M50/129H01M50/3425H01M50/178H01M50/105H01M50/531H01M50/557
Inventor 永田健祐
Owner 株式会社乐索纳克包装
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