Abstract: A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve is arranged on a first surface of the battery casing, the explosion-proof valve includes a fragile portion. The fragile portion protrudes toward a middle region of the first surface. The fragile portion includes a first end point and a second end point, and an area jointly enclosed by a connection line between the first end point and the second end point and the fragile portion between the first end point and the second end point is a. A minimum distance between the first end point and a circumferential edge of the first surface is b. A minimum distance between the second end point and the circumferential edge of the first surface is c.

Abstract: A battery manufacturing method and a battery are provided. The battery manufacturing method includes: providing a first housing, including a bottom wall and a side wall, wherein the side wall extends upward from the bottom wall, the side wall encloses to form an opening, the side wall extends outward from the opening to form a first flange, and a first reinforcing part is formed on the first flange; providing a second housing, wherein the second housing includes an intermediate part and a second flange, the intermediate part covers the opening, and the second flange is in contact with the first flange; and welding the first flange and the second flange.

Abstract: The disclosure discloses a battery and a battery apparatus. The battery includes two opposite first surfaces and four second surfaces disposed around the first surfaces, a pole assembly and a busbar. An area of the first surface is larger than an area of the second surface. The pole assembly is disposed on the first surface. The busbar is bent into a first segment and a second segment. The first segment is located at a side of the first surface where the pole assembly is disposed and is connected to the pole assembly. The second segment is parallel to or substantially parallel to a second surface and is used for electrically connecting the pole assembly of another battery.

Abstract: A battery device includes batteries arranged in a first direction. Each battery includes a top surface, a bottom surface, two first side surfaces, and two second side surfaces. The first side surfaces are perpendicular to and spaced apart in the first direction. The second side surfaces are parallel to the first direction and spaced apart in a second direction perpendicular to the first direction. Each battery has a flange structure arranged along at least one of the top surface, the bottom surface, and the second side surfaces. The battery device further includes brackets in contact with at least one of the top surface, the bottom surface, and the second side surfaces. The height of each bracket is greater than or equal to the height of the flange structure. At least a part of each bracket is located between at least a part of the flange structures of adjacent batteries.

Abstract: A battery and a battery manufacturing method are provided. The battery includes a battery casing, a cell, a first insulating film, and a second insulating film. The cell is disposed in the battery casing and includes a cell body and a tab portion, and the tab portion extends from a side surface of the cell body. The first insulating film covers at least a portion of the cell body. The second insulating film is independent from the first insulating film. The second insulating film covers an upper surface of the first insulating film and covers at least a portion of the tab portion, and the first insulating film is located between the cell body and the second insulating film.

Abstract: A battery includes a battery casing and a cell. The battery casing is provided with a liquid injection hole, and the cell is disposed in the battery casing. The cell includes a cell body and a tab portion. The tab portion extends from a side surface of the cell body, the liquid injection hole is located on a side of the cell body adjacent to the tab portion, and the liquid injection hole is disposed on a surface of the battery casing opposite to a larger surface of the tab portion. In a direction perpendicular to an extending direction of the cell body and the tab portion, a minimum vertical distance between the liquid injection hole and the tab portion is a, and a width of the cell body is b, where 5?b/a?20.

Abstract: A battery includes a battery casing, a first cell, and a second cell. A partition structure is arranged in the battery casing. The first cell is arranged in the battery casing, and at least a part of the first cell is located on a first side of the partition structure. The second cell is arranged in the battery casing, and at least a part of the second cell is located on a second side of the partition structure, and the first side and the second side are oppositely arranged, such that the first cell and the second cell are arranged in a first direction. The partition structure is formed with a communication channel penetrating the first side and the second side.

Abstract: A battery includes a first casing. The first casing includes a first metal piece and a second metal piece disposed inside the first metal piece, such that the first metal piece forms an outer surface of the first casing and the second metal piece forms an inner surface of the first casing. A material of the first metal piece is inconsistent with a material of the second metal piece. A corrosion potential of the second metal piece is higher than a corrosion potential of the first metal piece, and the corrosion potential of the second metal piece is higher than a negative electrode potential of the battery.

Abstract: A battery includes a battery casing and an explosion-proof valve. The battery casing includes a first casing member and a second casing member, and the first casing member and the second casing member are welded to form a welded connection region between the first casing member and the second casing member. The welded connection region includes a first region, a second region, and a corner region, and two ends of the corner region are respectively connected to the first region and the second region. The explosion-proof valve is disposed at a corner position of a surface of the first casing member and adjacent to the welded connection region.

Abstract: A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve is arranged on a first surface of the battery casing, the explosion-proof valve includes a fragile portion. The fragile portion protrudes toward a middle region of the first surface. The fragile portion includes a first end point and a second end point, and an area jointly enclosed by a connection line between the first end point and the second end point and the fragile portion between the first end point and the second end point is a. A minimum distance between the first end point and a circumferential edge of the first surface is b. A minimum distance between the second end point and the circumferential edge of the first surface is c.

Abstract: A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve includes a first straight line segment, a second straight line segment and a circular arc segment. Two ends of the circular arc segment are respectively connected to the first straight line segment and the second straight line segment. Lengths of the first straight line segment and the second straight line segment are respectively a and b, and an arc length of the circular arc segment is c, a radius of curvature of the circular arc segment is r, and 0.8?a/b?1.2 and 0.5?c/r?2.7 are satisfied.

Abstract: A battery and a battery apparatus are provided. The battery includes a cover plate, an explosion-proof valve arranged on the cover plate, and a protective patch arranged on an outer side of the cover plate. A sealed chamber is formed between the explosion-proof valve and the protective patch, and a notch penetrating through the protective patch is arranged on the protective patch in a thickness direction to form at least one cantilever portion. When a predetermined pressure is applied, the sealed chamber communicates with an outside through the cantilever portion that is opened. The cantilever portion has an area of a mm2. The protective patch has a thickness of b mm, where 0.5 mm?a/b?20 mm and 0.01 mm?b?1.2 mm, and the protective patch has a wetting tension of c, where 20 N/m?c?70 N/m.

Abstract: A battery and a battery apparatus are provided. The battery pack includes a cover plate, an explosion-proof valve, and a protective patch. The explosion-proof valve is arranged on the cover plate. The protective patch is arranged on an outer side of the cover plate. A sealed chamber is formed between the explosion-proof valve and the protective patch, and a notch penetrating through the protective patch is arranged on the protective patch in a thickness direction, such that when a predetermined pressure is applied, the sealed chamber communicates with an outside through the notch. The notch has a total length of a and the protective patch has a thickness of b, where 5?a/b?100 and 0.01 mm?b?1.2 mm, and the protective patch has a tensile strength of c, where c/b=xb?1.073.

Abstract: The disclosure relates to a technical field of batteries, and a battery and a battery apparatus are provided. The battery includes a cell, and the cell includes a cell body and tab portions. Each of the tab portions extends from one side of the cell body. The battery further includes a housing. The housing is a hollow structure, and the hollow structure is formed inside the housing. The cell is disposed in the housing, and the housing includes a first surface and a second surface opposite to each other. The first surface is provided with liquid injecting holes, and the liquid injecting holes penetrate the first surface and do not penetrate the second surface. An orthographic projection of the cell body on the first surface does not overlap the liquid injecting holes.

Abstract: A battery manufacturing method and a battery are provided. The battery manufacturing method includes: providing a first housing, wherein the first housing includes an intermediate part and a first flange, and a first positioning part is formed on the first flange; providing a second housing, wherein the second housing includes a bottom wall and a side wall, the side wall extends upward from the bottom wall, the side wall encloses to form an opening, the side wall extends outward from the opening to form a second flange, a second positioning part is formed on the second flange, the intermediate part covers the opening, and the second flange is in contact with the first flange; positioning and aligning the first housing and the second housing through the first positioning part and the second positioning part; and welding the first flange and the second flange.

Abstract: The disclosure relates to the technical field of batteries, and provides a battery manufacturing method, a battery, a battery module, and a battery pack. The battery manufacturing method includes following steps. Providing an insulating mylar, laminating on the insulating mylar to form a laminated cell that includes a separator film different from the insulating mylar, and wrapping the laminated cell with the insulating mylar. By laminating on the insulating mylar to form the laminated cell and then wrapping the laminated cell with the insulating mylar, a process of moving the laminated cell to the insulating mylar is omitted.

Abstract: The disclosure relates to the technical field of batteries, and provides a battery, a battery apparatus and a battery pack. The battery includes a battery surface and a pole element. The battery surface is provided with a first recess, and the first recess is used to accommodate the pole element of the other battery. The pole element is arranged on the battery surface and is located outside a range where the first recess is located. By providing the first recess on the battery surface, the pole element of the other battery can be accommodated in the first recess when the batteries are grouped.

Abstract: A battery manufacturing method and a battery are provided. The battery manufacturing method includes: providing a first housing, including a bottom wall and a side wall, wherein the side wall extends upward from the bottom wall, the side wall encloses to form an opening, the side wall extends outward from the opening to form a first flange, and a first reinforcing part is formed on the first flange; providing a second housing, wherein the second housing includes an intermediate part and a second flange, the intermediate part covers the opening, and the second flange is in contact with the first flange; and welding the first flange and the second flange.

Abstract: The disclosure relates to a technical field of batteries, and a battery and a battery apparatus are provided. The battery includes a cell, and the cell includes a cell body and tab portions. Each of the tab portions extends from one side of the cell body. The battery further includes a housing. The housing is a hollow structure, and the hollow structure is formed inside the housing. The cell is disposed in the housing, and the housing includes a first surface and a second surface opposite to each other. The first surface is provided with liquid injecting holes, and the liquid injecting holes penetrate the first surface and do not penetrate the second surface. An orthographic projection of the cell body on the first surface does not overlap the liquid injecting holes.

Abstract: The disclosure provides a battery, a battery module, a battery pack, and a battery manufacturing method. The battery includes a housing, a cell, and a pole column subassembly. The housing includes two first surfaces opposite to each other in a first direction. The cell is arranged in the housing. The cell includes a cell body and a tab portion. The tab portion includes two or more single-piece tabs extending from the lateral side of the cell body. When the single-piece tabs are flattened along the direction perpendicular to the lateral side of the cell body, the overlapping direction of the single-piece tabs is the first direction. The pole column subassembly is arranged on a first surface and connected with the tab portion. The orthographic projections of the tab portion and the pole column subassembly along the first direction are at least partially overlapped on a first surface.