The present invention relates to a secondary battery. The secondary battery according to the present invention may include an electrode assembly, an electrolyte, and a battery case configured to accommodate the electrode assembly and the electrolyte. The battery case may include a main body having accommodation space in which the electrode assembly and the electrolyte are accommodated, an additional electrolyte accommodation part having a storage space in which an additional electrolyte is accommodated, a connection part configured to form a moving passage through which the additional electrolyte is supplied from the addition electrolyte accommodation part to the main body, and an electrolyte impregnation member provided on the connection part and impregnated with the additional electrolyte.

A battery cell includes an electrode assembly and a packaging bag for accommodating the electrode assembly and a first adhesive layer and a second adhesive layer. One end of the first adhesive layer and one end of the second adhesive layer are both adhered to the first surface of the electrode assembly, and the other end of the first adhesive layer and the other end of the second adhesive layer both extend to the bottom of the electrode assembly and are adhered to a second surface opposite the first surface, a surface on which a terminating end of the electrode assembly is defined as the first surface; and a third adhesive layer, one end of the third adhesive layer is adhered to the first adhesive layer, and the other end of the third adhesive layer is adhered to the second adhesive layer.

A battery cell includes an electrode assembly, a housing, a cover plate, and a support member. The housing includes a first electrode plate and a second electrode plate. At least a part of the first electrode plate is stacked with the second electrode plate. The housing is provided with an opening and an accommodation cavity configured to accommodate the electrode assembly. The housing includes a side plate. The cover plate is perpendicular to the side plate and configured to close the opening. At least a part of the support member is disposed between the side plate and the electrode assembly, and the support member is configured to support the electrode assembly so that a spacing between an end, facing the side plate, of the first electrode plate and the side plate in a first direction is greater than a preset value. The first direction being a direction perpendicular to the side plate.

The terminal component disclosed herein is a terminal component for use in a terminal for secondary batteries. The terminal component includes a first metal and a second metal having a recess. The first metal includes a shall having a pair of flat surfaces and a fitting portion formed at one end of the shaft in the major axis direction. At the boundary between the first metal and the second metal, a joining portion joined by ultrasonic, joining and a crimping portion where the fitting portion of the first metal is fitted into the recess of the second metal are formed. A gap is formed between the recess and the fitting portion in the facing direction in which the gap faces the flat surfaces in plan view.

The terminal component disclosed herein is a terminal component for use in a terminal for secondary batteries. The terminal component includes a first metal and a second metal having a recess. The first metal includes a shall having a pair of flat surfaces and a fitting portion formed at one end of the shaft in the major axis direction. At the boundary between the first metal and the second metal, a joining portion joined by ultrasonic, joining and a crimping portion where the fitting portion of the first metal is fitted into the recess of the second metal are formed. A gap is formed between the recess and the fitting portion in the facing direction in which the gap faces the flat surfaces in plan view.

A secondary battery is provided with a pouch, in which a sealing portion formed on an edge of the pouch is sealed when an electrode assembly and an electrolyte are enclosed. The secondary battery includes a valve which is mounted on a sealing portion so that one end the valve is disposed inside the pouch, and the other end of the valve is disposed outside the pouch and discharges a gas generated inside the pouch to the outside. The valve comprises an inner tube filled with an adhesive and made of a material that is deformed when swelling occurs. When the swelling occurs to increase in pressure inside the pouch, a gap is generated in a portion that is filled with the adhesive, and the gas within the pouch is discharged to the outside though the gap.

A button-type secondary battery includes an electrode assembly in which electrodes and a separator are layered and wound, electrode tabs having different polarities protrude from top and bottom surfaces of the electrode assembly, respectively; a can including a bottom part with the electrode assembly disposed thereon and connected to one electrode tab, and a sidewall vertically extending along a circumference of the bottom part around the electrode assembly; and a top cap assembly with a terminal part connected to the other electrode tab and a plate coupled to be insulated from the terminal part and having an edge coupled to an upper end of the sidewall such that the top cap assembly is coupled to the can to close the can. An end of an edge of the plate is welded to be coupled after being seated on a point that meets the upper end of the sidewall.

In an embodiment, a battery includes a container, a lid member, an electrode group, an electrode terminal and an electrode group retainer. The lid member is attached to a peripheral wall of the container with an opening of an inner cavity being closed. The electrode terminal is electrically connected to the current collecting tab. The electrode group retainer is arranged between the electrode group and the lid member. A proximity plate portion of the electrode group retainer is close to the electrode group from a side where the lid member is located and forms a space between the lid member and thereof. A facing surface of the proximity plate portion is formed to have a shape that is along an outer surface of an end portion of the electrode group on a side where the lid member is located.

A battery and an electronic device are disclosed, which relate to the field of electronic device technologies, so that the battery has different characteristics to meet use requirements for the battery in different application scenarios. Specifically, the battery includes a first cell and a second cell, and the first cell is different from the second cell. The battery provided in embodiments of this application is configured to provide power for the electronic device.

A secondary battery according to the present invention comprises a pouch comprising an accommodation part accommodate the electrode assembly, a gas pocket part collecting a gas generated in the accommodation part, an edge sealing part provided along each of edge surfaces of the accommodation part and the gas pocket part, and a corner sealing part provided on each of both ends of a boundary between the accommodation part and the gas pocket part to support the electrode assembly accommodated in the accommodation part, wherein the corner sealing part comprises a full-width support surface supporting one end in a full-width direction of the electrode assembly, which faces the gas pocket part, and a full-length support surface provided between the full-width support surface and the edge sealing part, having a width greater than that of the full-width support surface, and supporting one end in a full-length direction of the electrode assembly, which faces the edge sealing part, and the full-length support surface, the full-width support surface, and the edge sealing part are integrally connected to each other.