Exterior component for secondary battery

Abstract

The present invention pertains to an exterior component for a secondary battery. The exterior component comprises a substrate layer, a barrier layer and a sealing layer in order, wherein the barrier layer is made of metal coil and is at least provided with an anticorrosion treating layer at the sealing layer side, the sealing layer is directly formed on the anticorrosion treating layer, the thickness of the sealing layer is 5-30 [mu]m, and the sealing layer comprises a compound having a high melting point.

Description

technical field [0001] The present invention relates to an exterior member for a secondary battery. Background technique [0002] In recent years, the spread of portable devices such as mobile phones, smartphones, and music player portable devices, hybrid electric vehicles, electric vehicles, etc. is advancing. Secondary batteries typified by nickel-hydrogen batteries, lithium ion batteries, and the like are used as batteries for supplying electricity as their power sources and power sources. For secondary batteries, light weight and compactness are required in portable equipment applications, and in vehicle applications, they are connected in parallel or in series to increase energy and output power, and multilayers are developed. Light weight and compactness are further demanded. [0003] Therefore, for secondary batteries, metal cans and laminated film exterior members are used depending on the application and usage environment, and the laminated film exterior member ha...

AI Technical Summary

Problems solved by technology

[0009] However, the method described in Patent Document 1 can prevent a short circuit between the tab lead and the metal foil used as the barrier layer of the exterior member, but the film thickness becomes thicker due to the addition of an intermediate layer.

[0010] Lithium-ion secondary batteries, which have become popular in recent years, have the danger of degraded battery performance, heat generation, and fire due to failure to maintain electrical insulation. Therefore, it is necessary to prevent secondary batteries from short-circuiting.

However, on the other hand, the actual situation is that effective means for preventing a short circuit between the tab lead and the secondary battery exterior member while reducing the thickness of the exterior member in this way have not yet been sufficiently obtained.

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