Abstract: A top cover assembly for a battery, a battery, and an energy storage device are provided in the disclosure. The top cover assembly includes an insulating cover plate, a top cover plate, an insulating member, and a current collector stacked in sequence. A surface of the first flange close to the insulating member, an inner circumferential wall of the mounting hole, and a surface of the top cover plate close to the first flange and extending beyond the inner circumferential wall of the mounting hole define a sealing cavity. An inner circumferential wall of the through hole and an outer circumferential wall of the main body define a gap therebetween, the gap communicates with the sealing cavity, and a sealing member is received in the sealing cavity.

Abstract: The present disclosure discloses a top cover assembly and a battery. The top cover assembly comprises a top cover plate and an explosion-proof sheet. The explosion-proof sheet is configured for being connected to the top cover plate to close an explosion-proof hole formed in the top cover plate, and the explosion-proof sheet comprises: a connecting portion, a body portion, a weak portion and a reinforced portion, the connecting portion is configured for being connected to the top cover plate, the body portion is connected to the connecting portion and configured for closing the explosion-proof hole corresponding to the explosion-proof hole, the weak portion is located between the body portion and the connecting portion, the reinforced portion is convexly arranged on the body portion, along thickness direction of the explosion-proof sheet, the thickness of the reinforced portion is h1, the thickness of the body portion is h2, and 1<(h1+h2)/h2?2.8.

Abstract: An electrode assembly of a secondary battery and a secondary battery are provided. The assembly has a positive electrode sheet, a separator and a negative electrode sheet. The positive electrode sheet has a positive electrode main body area and a positive pole tab area. A side of the positive electrode main body area is coated with a positive pole active material layer. The negative electrode sheet has a negative pole main body area and a negative pole tab area. A side of the negative pole main body area is coated with a negative pole active material layer. The separator is sandwiched between the positive pole active material layer and the negative pole active material layer.

Abstract: The present disclosure discloses a top cover assembly of battery and top cover assembly, the top cover assembly comprising: a top cover having first recess on top surface, the first recess is provided around mounting hole; a terminal post penetrating mounting hole, first end of terminal post is limited to a side of top cover on which a bottom surface is located, second end of terminal post is higher than top surface of top cover; an upper plastic member provided on a side of top cover where top surface thereof is located and surrounding second end of terminal post to be connected to second end of the terminal post, the upper plastic member has a first boss on a bottom surface, the first boss is accommodated in the first recess, the bottom surface of the upper plastic member is connected to the top surface of the top cover.

Abstract: A top cover assembly and a battery are disclosed. The top cover assembly has a cover, a pole and an upper plastic member. The cover is provided with a first installation through hole. The pole operatively penetrates the first installation through hole and an end of the pole is higher than an upper surface of the cover. The upper plastic member is integrally injection-molded on the cover and surrounding the pole.

Abstract: An electrode assembly for a battery and a battery are provided. The assembly has a winding main body. the winding main body has a side end face. Multiple tabs are extendedly provided on the side end face. The tabs are stacked to form a tab group. Each tab has a first side edge, a second side edge, a third side edge and a fourth side edge connected in sequence. The first side edge is opposite to the third side edge. The second side edge is opposite to the fourth side edge. The fourth side edge is fixedly connected with the side end face. The first side edge of at least one tab in the tab group is staggered in a first direction with respect to the first side edge of the topmost tab of the tab group.

Abstract: The present disclosure discloses a cover body assembly of a battery and a battery. The battery includes a housing provided with an opening; a cover body assembly used for closing the opening; and a jelly-roll arranged inside an inner cavity of the housing; a liquid injection channel is arranged on the cover body assembly; electrolyte is injected into the inner cavity of the housing through the liquid injection channel, thus soaking the jelly-roll; the cover body assembly includes a cover body; and a lower insulation plate which is connected to a bottom surface of the cover body and is disposed at an interval, thus forming a distribution channel between the lower insulation plate and the cover body; and the distribution channel is communicated to the liquid injection channel and the inner cavity of the housing.

Abstract: The present disclosure relates to a top cover for a battery which belongs to the technical field of batteries, comprising: a top cover body; a liquid injection hole formed in the top cover body and having a first side face; a sealing pin accommodated in the liquid injection hole and having a second side face, wherein the first side face is parallel to the second side face, there exists a gap between the first side face and the second side face; and a welding part connecting the sealing pin and the top cover body, and filling at least part of the gap.

Abstract: An explosion-proof sheet, a top cover assembly of a secondary battery, and a secondary battery are provided. The explosion-proof sheet has a pressure release portion arranged oppositely to the explosion-proof hole, a fixing portion surrounding the pressure release portion and connected to the top cover, a connecting portion located between the pressure release portion and the fixing portion for connecting the pressure release portion to the fixing portion. A thickness of a part of the connecting portion is greater than a thickness of the remaining part of the connecting portion.

Abstract: An explosion-proof sheet of a secondary battery and a secondary battery are provided. The explosion-proof sheet has a main body portion, a fixing portion, and a cracking portion. The main body portion is opposite to the explosion-proof hole. A strengthening region is formed on the main body portion. The fixing portion is disposed around the main body portion, and the fixing portion is connected to a periphery of the explosion-proof hole. The cracking portion is located between the fixing portion and the main body portion and connected to the fixing portion and the main body portion.

Abstract: A battery having a housing, a core assembly, a separator and a top cover assembly is provided. The housing defines an accommodating cavity for receiving the core assembly. The core assembly has a jelly-roll having a body portion, and an insulating sheet. The body portion has a top end surface and a bottom end surface located at the ends of the body portion respectively, and a peripheral surface connected to the top the bottom end surfaces. The insulating sheet covers the peripheral surface and/or the bottom end surface. The separator is in the housing and separates the bottom end surface of the jelly-roll from a bottom surface of the housing. The top cover assembly is connected to the housing in a sealed manner and configured to close the opening of the housing. The top cover assembly is spaced from the insulating sheet.

Abstract: A top cover assembly for a battery, a battery, and an energy storage device are provided in the disclosure. The top cover assembly for a battery includes a pole and a pressing block. The pressing block defines a limiting hole. The pole extends through and is at least partially located in the limiting hole. The limiting hole has a first hole section and a second hole section axially connected with the first hole section. The first hole section has a radial size larger than the second hole section. In the top cover assembly for a battery according to implementations of the disclosure, the first hole section and the second hole section connected in the axial direction can make an inner circumferential wall of the limiting hole stepped.

Abstract: A top cover assembly for a battery, a battery, and an energy storage device are provided in the disclosure. The top cover assembly includes an insulating cover plate, a top cover plate, an insulating member, and a current collector stacked in sequence. A surface of the first flange close to the insulating member, an inner circumferential wall of the mounting hole, and a surface of the top cover plate close to the first flange and extending beyond the inner circumferential wall of the mounting hole define a sealing cavity. An inner circumferential wall of the through hole and an outer circumferential wall of the main body define a gap therebetween, the gap communicates with the sealing cavity, and a sealing member is received in the sealing cavity.

Abstract: A top cover assembly for a battery, a battery, and an energy storage device are provided in the disclosure. The top cover assembly includes a pole and a current collector having multiple folding sections. The multiple folding sections include at least a first folding section and a second folding section. The first folding section is spaced apart from the second folding section in a length direction of the current collector. The current collector is divided by the first folding section and the second folding section into a first part, a second part, and a third part. The first part is bent toward one side of the second part and connected with the pole. The third part is bent toward the other side of the second part and connected with a wound core of the battery.

Abstract: The present invention discloses a casing for a battery and a battery. The casing for the battery comprises a body. The body comprises a shell and at least one cover; at least one end of the shell is open; the cover is arranged at the one end of the shell; the shell comprises at least one first shell portion and a second shell portion which are connected to each other; the first shell portion is opposite to the cover; a thickness of the first shell portion is larger than that of the second shell portion; and a mounting portion is arranged at one end of the shell.

Abstract: An explosion-proof valve applicable to a battery, the battery, and an energy storage device are provided in the present disclosure. The energy storage device includes the battery. The battery includes the explosion-proof valve, a housing, a winding core, and a top cover assembly. The explosion-proof valve applicable to the battery includes a body, a first notch groove, and at least one second notch groove. The first notch groove is defined on a side surface of the body. The at least one second notch groove is defined on a groove wall of the first notch groove. The winding core is located in the housing. The top cover assembly seals the housing, where the explosion-proof valve is installed in the top cover assembly, and the first notch groove is defined at a side of the top cover assembly close to the winding core.

Abstract: The present invention discloses a casing for a battery and the battery. The casing for the battery comprises a body. The body comprises a shell and at least one cover; at least one end of the shell is open; the cover is arranged at the one end of the shell; the shell comprises at least one first shell portion and a second shell portion which are connected to each other; the first shell portion is opposite to the cover; a thickness of the first shell portion is larger than that of the second shell portion; and a groove recessed toward a central axis direction of the shell is formed in the first shell portion.

Abstract: Provided are a top cover assembly of a cell, a cell, and a power battery. The top cover assembly includes an insulation cover plate, a metallic support plate, a terminal assembly, and an elastic seal. The metallic support plate and the insulation cover plate are stacked in a thickness direction. The terminal assembly passes through the insulation cover plate and the metallic support plate in the thickness direction to connect the insulation cover plate and the metallic support plate. The elastic seal surrounds a peripheral outside of the metallic support plate and the insulation cover plate. The elastic seal has a positioning flange provided on an inner peripheral surface thereof and is configured to be in a sealing fit with a housing of the cell. The positioning flange is sandwiched between the metallic support plate and the insulation cover plate.

Abstract: Provided are a cover assembly for a battery and a battery. The cover assembly for the battery includes an elastic cover, an insulating cover, a frame support member and a terminal column assembly. The insulation cover is embedded in one end of the elastic cover. The frame support member has a greater hardness than the elastic cover and the insulating cover. The frame support member is embedded in the other end of the elastic cover. The elastic cover has an encapsulation portion disposed on an outside, in a radical direction, of the insulating cover and the frame support member. The encapsulation portion is in a cylindrical shape and configured to abut against an inner surface of a housing of the battery. The terminal assembly includes a terminal penetrating the insulating cover and the elastic cover.

Abstract: The present disclosure relates to a welding device and a processing apparatus for a secondary battery current collector. The welding device includes: a welding head; and an anvil block. A welding station is disposed between the welding head and the anvil block. The welding device is configured to weld a foil to a portion of a composite current collector at the welding station. According to this solution, the foil can be used as a tab of the composite current collector by using the foil to connect with the composite current collector so as to output the current in the battery cell.