An electrochemical device includes a housing including a body portion and a first portion, an electrode assembly, and a tab. In a second direction, the body portion includes a first wall and a second wall disposed opposite to each other. In a third direction, the body portion includes a first sidewall and a second sidewall disposed opposite to each other. The first portion includes a first seal edge and a second seal edge. The first seal edge is connected to the first sidewall and the second wall. The second seal edge is connected to the first seal edge. The second seal edge is disposed between the first seal edge and the first sidewall. The housing includes a first housing part and a second housing part disposed opposite to each other. The first housing part includes a first polymer layer. The second housing part includes a second polymer layer.

Provided are a secondary battery and a battery pack including the secondary battery. A sealing plate has a positive electrode terminal attachment hole. A positive electrode terminal penetrates the positive electrode terminal attachment hole. An external conductive member is connected to a portion of the positive electrode terminal located on the battery outer side with respect to the sealing plate. The conduction path between a positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. A first insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. A second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate.

Embodiments include enclosures for protecting electronics such as circuit board and battery assemblies in high-pressure environments. Customized pressure distribution structures are positioned around the electronics. The pressure distribution structures include cavities that are sized to distribute pressure across the electronics in a predetermined manner based on known pressure tolerances of components or portions of the electronics. The pressure distribution structures may include various features such as vias for enhancing thermal conductivity. The enclosure may be sealed and surrounded by an envelope. Methods for manufacturing such enclosures are disclosed.

Embodiments include enclosures for protecting electronics such as circuit board and battery assemblies in high-pressure environments. Customized pressure distribution structures are positioned around the electronics. The pressure distribution structures include cavities that are sized to distribute pressure across the electronics in a predetermined manner based on known pressure tolerances of components or portions of the electronics. The pressure distribution structures may include various features such as vias for enhancing thermal conductivity. The enclosure may be sealed and surrounded by an envelope. Methods for manufacturing such enclosures are disclosed.

A rechargeable battery according to one embodiment of the present invention includes: an electrode assembly having a separator interposed between a first electrode and a second electrode; a case including an upper case having an open lower portion and a penetration hole in the upper portion thereof, and a lower case having an open upper portion to seal the lower portion of the upper case, and accommodating the electrode assembly therein; and a cap plate coupled to the upper case so as to seal the penetration hole and electrically insulated from the upper case, wherein the upper case and the lower case are coupled such that partial regions overlap, and an upper end of the lower case protrudes inwardly and is latched and fixed to the outside of the upper case.

A battery cell, a battery pack and an electronic device with improved durability by reducing bend-induced damage, whereby a battery cell includes at least two battery units, each including a plurality of electrode leads, an electrode assembly, an electrolyte solution and an inner pouch in which the electrode assembly and the electrolyte solution are received, wherein at least one of the plurality of electrode leads of one battery unit is inserted into the other battery unit and electrically connected to the electrode assembly, and an outer pouch including at least two receiving portions in which the at least two battery units are received respectively, and a bending portion in which a part of the plurality of electrode leads is disposed and a part between the at least two receiving portions is bent.

A battery housing structure and a button battery. The battery housing structure comprises an upper cover and a bottom housing; the bottom housing mates with the upper cover to form a sealing cavity; the sealing cavity is used for mounting of a cell assembly; the bottom housing is provided with a first blind groove. The button battery comprises the cell assembly and the battery housing structure, and the cell assembly is provided in the sealing cavity.

A battery housing structure and a button battery. The battery housing structure comprises an upper cover and a bottom housing; the bottom housing mates with the upper cover to form a sealing cavity; the sealing cavity is used for mounting of a cell assembly; the bottom housing is provided with a first blind groove. The button battery comprises the cell assembly and the battery housing structure, and the cell assembly is provided in the sealing cavity.

A secondary battery includes: an electrode assembly; a case accommodating the electrode assembly; a current collector plate welded to the electrode assembly and the case; and a cap plate on the current collector plate and sealing the case.

A secondary battery includes: an electrode assembly; a case accommodating the electrode assembly; a current collector plate welded to the electrode assembly and the case; and a cap plate on the current collector plate and sealing the case.