SECONDARY BATTERY CASE, AND SECONDARY BATTERY COMPRISING THE SAME

• Main Author: HAYASHI MICHIYA
• Format: Patent
• Language: English; Japanese
• Published: 01.12.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a secondary battery case capable of improving heat resistance to laser welding and the like while suppressing leakage of an electrolytic solution to the exterior and infiltration of moisture to the interior.SOLUTION: A secondary battery case comprises: a case main body 10; a collector terminal 2 provided so as to penetrate through the case main body; a first sealing member 31 that seals between the case main body and the collector terminal; and a second sealing member 32 provided at an inner side of the case main body from the first sealing member and in contact with a lateral face 2a of the collector terminal and a part of an inner surface of the case main body. The first sealing member contains fluorine-based rubber as a main component. The second sealing member contains ethylene-α olefin-based copolymer rubber as a main component.SELECTED DRAWING: Figure 2 【課題】電解液の外部への漏出および水分の内部への侵入を抑制しつつ、レーザ溶接等に対する耐熱性が向上した二次電池用のケースを提供する。【解決手段】二次電池用のケースは、ケース本体１０と、前記ケース本体を貫通するように設けられた集電端子２と、前記ケース本体と前記集電端子との間をシールする第１シール部材３１と、前記第１シール部材よりも前記ケース本体の内部側に設けられ、前記集電端子の側面２ａ、および、前記ケース本体の内表面の一部に接する第２シール部材３２とを備える。前記第１シール部材は、主成分としてフッ素系ゴムを含有する。前記第２シール部材は、主成分としてエチレン－αオレフィン系共重合ゴムを含有する。【選択図】図２