A thin-type battery includes: a flat shaped electrode body formed by stacking a positive electrode and a negative electrode while interposing a separator in between; an electrolyte; and an exterior body made from a laminate film, the exterior body enclosing the electrode body and the electrolyte with ends of the exterior body being hermetically sealed by heat-sealing, wherein the exterior body includes a folded part to be folded from one surface side to another surface side of the electrode body and to extend along an edge of the electrode body, and the folded part includes resin-interposed heat-sealing portions located in regions in two ends in a direction along the edge of the electrode body and outside the electrode body, where portions of the exterior body are opposed to each other, each resin-interposed heat-sealing portion being heat-sealed by interposing a piece made from a resin.

A secondary battery includes: a case member; a cover member having a through-hole and configured to close an opening of the case member; a terminal member passed through the through-hole; and a sealing member configured to close a gap between the cover member and the terminal member. The sealing member includes: an exposed end portion placed to be exposed inside the case member; and an extending portion extending from the exposed end portion toward the position of the through-hole. The cover member includes a first surface portion. The terminal member includes a second surface portion placed to face the first surface portion via a distance. The first surface portion and the second surface portion are placed to compress the extending portion. The distance between the first surface portion and the second surface portion increases toward the position of the exposed end portion.

Various embodiments of the present invention relate to a secondary battery, wherein a technical problem to be solved is to provide a secondary battery capable of maintaining an electrical insulating state between a case (can) and a cap assembly even after a gasket is melted due to short-circuiting and heat generation. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly received, along with an electrolyte, in the cylindrical can; a cap assembly for sealing the cylindrical can; and a gasket interposed between the cylindrical can and the cap assembly, wherein the gasket further includes an insulating member having a melting temperature higher than a melting temperature of the gasket.

The present disclosure discloses a cylindrical or button battery. The battery includes a cap, a shell and a ring seal, wherein the cap and the shell are both of a tubular structure having a cover portion and are fitted together to form a hermetic space for accommodating a battery cell; the ring seal is located between a side wall of the cap and a side wall of the shell and is capable of shrinking or being torn when reaching a set temperature so as to form a slit between the side wall of the cap and the side wall of the shell to release pressure. The ring seal of the battery can shrink or be torn at the set temperature to release pressure, and therefore the battery is characterized by excellent safety.

Provided sealing assembly and lithium ion battery. The sealing assembly includes a cover plate, conductors, and sealing mechanisms. The cover plate provided with fixing members for fixing electrode posts. The fixing members and the cover plate integrally stamped and formed. Each fixing member includes an enclosure plate and a limiting plate. The cover plate further provided with mounting holes for installing the electrode posts. Each enclosure plate located on first side surface of the cover plate and surrounds a periphery of a respective mounting hole. The limiting plate formed by extending an end of respective enclosure plate facing away from the cover plate to center of a respective mounting hole. Each conductor connected between respective fixing member and respective electrode post through injection-molded. The sealing mechanism fixed on second side surface of the cover plate and configured to seal gaps between the cover plate and the electrode posts.

This application relates to an end cover assembly, a battery cell, a degassing method, a battery, and an electric apparatus. The end cover assembly includes: an end cover plate provided with a degassing hole, where the degassing hole penetrates through the end cover plate; and a degassing apparatus mounted in the degassing hole, where the degassing apparatus includes a columnar portion, a first limiting portion, a second limiting portion, a first elastic member, and a second elastic member. The columnar portion penetrates through the degassing hole. The first limiting portion and the second limiting portion are respectively located on an outer side and an inner side of the end cover plate. The first elastic member is located between the first limiting portion and the end cover plate. The second elastic member is located between the second limiting portion and the end cover plate.

A secondary battery includes: a cylindrical case; an electrode assembly accommodated in the cylindrical case and wound in a cylindrical shape; and a current interrupt device electrically connected to the electrode assembly and sealing the cylindrical case. The current interrupt device includes a cap-down electrically connected to the electrode assembly, a safety vent electrically connected to the cap-down, and an insulating gasket between the cap-down and the safety vent and covering outer circumferences of the cap-down and the safety vent.

A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.

A sealed secondary battery cell that is chargeable between a charged state and a discharged state is provided. The sealed secondary battery cell comprises a hermetically sealed enclosure comprising a polymer enclosure material, an electrode assembly enclosed by the hermetically sealed enclosure, a set of electrode constraints, and a rated capacity of at least 100 mAmp.Math.hr. A thermal conductivity of the secondary battery cell along a thermally conductive path between the vertically opposing regions of the external vertical surfaces of hermetically sealed enclosure in the vertical direction is at least 2 Wm.Math.K.

A sealed secondary battery cell that is chargeable between a charged state and a discharged state is provided. The sealed secondary battery cell comprises a hermetically sealed enclosure comprising a polymer enclosure material, an electrode assembly enclosed by the hermetically sealed enclosure, a set of electrode constraints, and a rated capacity of at least 100 mAmp.Math.hr. A thermal conductivity of the secondary battery cell along a thermally conductive path between the vertically opposing regions of the external vertical surfaces of hermetically sealed enclosure in the vertical direction is at least 2 Wm.Math.K.