BATTERY CASE FOR SECONDARY BATTERY, AND METHOD OF MANUFACTURING GAS EXHAUSTION PART

To provide a battery case for a secondary battery and a method of manufacturing a gas exhaustion part capable of exhausting gas inside a pouch to the exterior to adjust pressure when an internal pressure of the pouch increases.SOLUTION: A battery case for a secondary battery according to an embodime...

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Bibliographische Detailangaben
Hauptverfasser: SAN FUN KIM, YU HYUNG KYUN, CHOI YONG SU, HWANG SOO JI, KIMYOON
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a battery case for a secondary battery and a method of manufacturing a gas exhaustion part capable of exhausting gas inside a pouch to the exterior to adjust pressure when an internal pressure of the pouch increases.SOLUTION: A battery case for a secondary battery according to an embodiment of the present invention for solving the above problem is a battery case for a secondary battery including: a cup part provided with an accommodation space for accommodating an electrode assembly formed by laminating an electrode and a separator; a sealing part formed to extend in an outward direction of the cup part; and a gas exhaustion part attached to the inside of a hole formed by perforating at least one of the cup part and the sealing part and through which gas is transmitted. The gas exhaustion part includes: a gas exhaustion layer through which gas is transmitted; and an external functional layer formed on an outer lateral face of the gas exhaustion layer, and having a hydrophobic property.SELECTED DRAWING: Figure 5 【課題】本発明は、パウチの内部圧力が増加すると、内部のガスを外部に排出して圧力を調節することができる、二次電池用電池ケースおよびガス排出部の製造方法を提供する。【解決手段】上記の課題を解決するための本発明の実施形態に係る二次電池用電池ケースは、二次電池用電池ケースであって、電極およびセパレータが積層されて形成される電極組立体を収容する収容空間が備えられたカップ部と、前記カップ部の外側方向に延長形成されるシール部と、前記カップ部または前記シール部のうち少なくとも一方に穿孔されて形成されたホールに、内側に付着され、ガスが透過するガス排出部とを含み、前記ガス排出部は、ガスが透過するガス排出層と、前記ガス排出層の外側面に形成され、疎水性を有する外部機能性層とを含む。【選択図】図5