A lid body including: a terminal member of at least one electrode; a sealing plate having a mounting hole for attaching the terminal member; and a sealing material containing an inorganic filler. The terminal member is inserted into the mounting hole and is attached to the sealing plate in a state where the sealing material is joined to a peripheral edge portion of the mounting hole. In a microscope observation of a cross section of the sealing material, an average aspect ratio of the inorganic filler is 2 or higher, and with an average orientation angle of the inorganic filler is 30 degrees or smaller, in at least the sealing material formed on an outer surface of the sealing plate.

A lid body including: a terminal member of at least one electrode; a sealing plate having a mounting hole for attaching the terminal member; and a sealing material containing an inorganic filler. The terminal member is inserted into the mounting hole and is attached to the sealing plate in a state where the sealing material is joined to a peripheral edge portion of the mounting hole. In a microscope observation of a cross section of the sealing material, an average aspect ratio of the inorganic filler is 2 or higher, and with an average orientation angle of the inorganic filler is 30 degrees or smaller, in at least the sealing material formed on an outer surface of the sealing plate.

Provided is a lid body including: a terminal member being mainly made up of a first metal; a sealing plate mainly made up of a second metal; and a sealing material. The sealing plate has a mounting hole for attaching the terminal member. The terminal member is inserted into the mounting hole and is attached to the sealing plate in a state where the sealing material is joined to a peripheral edge portion of the mounting hole. With as α.sub.S a coefficient of linear expansion at 25° C. of the sealing material, α.sub.1 as a coefficient of linear expansion at 25° C. of the first metal and α.sub.2 as a coefficient of linear expansion at 25° C. of the second metal, α.sub.L≤α.sub.S≤α.sub.H is satisfied, where α.sub.H is the higher value and α.sub.L is the lower value from among the α.sub.1 and α.sub.2.

Provided is a lid body including: a terminal member being mainly made up of a first metal; a sealing plate mainly made up of a second metal; and a sealing material. The sealing plate has a mounting hole for attaching the terminal member. The terminal member is inserted into the mounting hole and is attached to the sealing plate in a state where the sealing material is joined to a peripheral edge portion of the mounting hole. With as α.sub.S a coefficient of linear expansion at 25° C. of the sealing material, α.sub.1 as a coefficient of linear expansion at 25° C. of the first metal and α.sub.2 as a coefficient of linear expansion at 25° C. of the second metal, α.sub.L≤α.sub.S≤α.sub.H is satisfied, where α.sub.H is the higher value and α.sub.L is the lower value from among the α.sub.1 and α.sub.2.

A battery comprising: a case having an opening at one end and a bottom at the other end. The case including a cylindrical side surface, an electrode group accommodated in the case together with an electrolytic solution, a cap that seals the opening of the case, and a gasket disposed between the opening of the case and the cap. The case includes an annular groove protruding inward of the case in a part of the cylindrical side surface. The gasket includes a seal accommodating the cap and a cylindrical part extending from the seal toward the electrode group. The cylindrical part of the gasket and a deepest groove of the case have portions in contact with each other, and a contact of the gasket is compressed by the deepest groove of the case.

A non-aqueous electrolyte including a battery case which has an opening and a sealing plate sealing the opening includes: a blind rivet fixed to the sealing plate by inserting the blind rivet into an opening portion provided in the sealing plate via a gas permeable membrane. The gas permeable membrane includes a tubular portion and a flange. The blind rivet includes: a sleeve body including a sleeve portion and a flange portion; and a mandrel including a shaft to be inserted into a hollow portion of the sleeve portion and a head. The blind rivet is crimped with the sleeve portion, and fixed to the sealing plate with the sleeve portion and the head being covered with the tubular portion. A space communicating with the outside of the battery case is formed between the gas permeable membrane and the blind rivet.

A non-aqueous electrolyte including a battery case which has an opening and a sealing plate sealing the opening includes: a blind rivet fixed to the sealing plate by inserting the blind rivet into an opening portion provided in the sealing plate via a gas permeable membrane. The gas permeable membrane includes a tubular portion and a flange. The blind rivet includes: a sleeve body including a sleeve portion and a flange portion; and a mandrel including a shaft to be inserted into a hollow portion of the sleeve portion and a head. The blind rivet is crimped with the sleeve portion, and fixed to the sealing plate with the sleeve portion and the head being covered with the tubular portion. A space communicating with the outside of the battery case is formed between the gas permeable membrane and the blind rivet.

A battery module is provided whereby loss of productivity can be minimized even when producing multiple exterior body parts for different battery module sizes. The battery module of the disclosure has an exterior body and an all-solid-state battery stack encapsulated in the exterior body. The exterior body has a tubular body and a pair of covers. The tubular body has flanges at both open ends. The flanges at both ends of the tubular body and the outer edge sections of the pair of covers are each joined forming joints, with the exterior body being sealed by the joints. The all-solid-state battery stack has one or multiple constituent unit cells. The direction of stacking of each of the layers of the constituent unit cell is in the axial direction of the tubular body.

One embodiment of the present invention relates to a cylindrical secondary battery. The present invention comprises: an electrode assembly comprising a negative electrode plate, a positive electrode plate, and a separator interposed between the negative electrode plate and the positive electrode plate, and having a wound shape in one direction; a metallic finishing tape attached to the outer peripheral surface of the electrode assembly so as to cover at least a portion of the electrode assembly; a cylindrical can having one side opened so as to accommodate the electrode assembly along with an electrolyte; and a cap assembly coupled to the open one side of the can so as to seal the can. According to the present invention, by applying the metallic tape to a winding finishing portion of the electrode assembly, the effect is gained of improving the dispersion of quality of a substrate finishing structure, caused by the dispersion of a major axis. In addition, the metallic tape plays the role of an additional end tab (substrate tab), and thus the effect is gained of improving the dispersion of cell performance.

The present invention relates to a secondary battery capable of improving the coupling force between a safety vent and a cap-up. For example, disclosed is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; a cap assembly coupled to the upper part of the case; and a gasket interposed between the cap assembly and the case, wherein the cap assembly includes a cap-up and a safety vent, which is provided at the lower part of the cap-up and has a vent extension part extending to the upper part of the cap-up so as to encompass the edge of the cap-up, a welding region, in which the safety vent and the cap-up are welded and coupled by laser welding, is formed in the vent extension part, and the welding region is formed in a line shape.