Abstract: The application relates to an end cover assembly, a battery cell, a battery, and a device and method for manufacturing a battery cell. The end cover assembly is used for a battery cell, and includes a cover plate, the cover plate is provided with a pressure relief hole penetrating through the cover plate in a thickness direction, a breathable film, arranged opposite to the pressure relief hole and configured to exhaust gas inside the battery cell, a projection of the breathable film in the thickness direction does not overlap with a projection of the cover plate in the thickness direction; and a fixing member, configured to connect the cover plate to fix the breathable film. The application intends to solve the problem of a large space occupied by the breathable film.

Abstract: A shell, a battery cell, a battery, and an electric device. At least partial area of a shell 211 has a tensile strength Rm at a temperature of 25° C. At least part of the shell 211 comprises first shell walls 2112, the average thickness of the first shell walls 2112 is T, Rm and T satisfy the following: 250 MPa?Rm?2000 MPa, 0.05 mm?T?0.5 mm, and 60 mm·MPa?T×Rm?500 mm·MPa.

Abstract: A battery cell, a battery, and an electric device are disclosed. The battery cell includes an insulating film and an electrode assembly. The insulating film includes a bottom wall, and a side wall connected to the bottom wall, the bottom wall and the side wall enclose an accommodation space, a gap is formed between the side wall and the bottom wall, and the gap runs through the side wall and is in communication with the accommodation space. The electrode assembly is disposed in the accommodation space and abuts against the bottom wall.

Abstract: A battery cell, a battery, and an electric device. The battery cell comprises: an electrode assembly comprising a positive electrode sheet and a negative electrode sheet, the positive electrode sheet and the negative electrode sheet form a flat region; and a housing comprising a first wall portion and two second wall portions, the two second wall portions being respectively located on two sides of the flat region in a first direction. The first wall portion comprises a shell body and a pressure relief portion, wherein the shell body is arranged around the periphery of the pressure relief portion, a notch groove is formed in the pressure relief portion and has a first groove wall section obliquely extending in the first direction on a bottom wall thereof, and the first groove wall section is at an angle to the first direction.

Abstract: A battery cell described includes a housing, a sealing member, an electrode terminal, and a first insulating member. A wall part of the housing includes a body and a flange, the body is provided with a first through hole, and the flange is arranged around the first through hole. The sealing member is at least partially arranged around the first through hole. Each electrode terminal is at least partially located in a space defined by the flange, and the sealing member is at least partially sandwiched between the electrode terminal and the body. The first insulating member is located between the flange and the electrode terminal. The flange includes a pressing portion and a first connection portion, the first connection portion connects the body to the pressing portion, the pressing portion presses against the electrode terminal through the first insulating member.

Abstract: The present application discloses a battery cell, a battery, and an electrical apparatus, wherein the battery cell includes an electrode assembly, a shell, and an electrode terminal; the electrode assembly is at least partially accommodated in the shell; the electrode terminal is electrically connected to the electrode assembly; the electrode terminal is arranged on a wall portion of the shell, the electrode terminal includes a first metal layer and a second metal layer that are made of different materials; in the thickness direction of the wall portion, the first metal layer is located on one side of the second metal layer facing the electrode assembly; the first metal layer and the second metal layer are connected to form a connecting interface, and at least a part of the connecting interface is a curved surface.

Abstract: A housing, a battery cell, a battery, and an electrical device. An end portion of the housing along a first direction is provided with a housing opening, the housing comprises a first side plate and a second side plate arranged along the circumferential direction of the housing opening, a connecting plate is connected to the first side plate and the second side plate, at least part of an outer surface of the connecting plate comprises a curved face, the connecting plate comprises a first plate portion and a second plate portion, and on the first direction, the second plate portion is located on the side of the first plate portion close to the housing opening. The maximum thickness of the second plate portion is greater than or equal to the maximum thickness of the first plate portion.

Abstract: A battery cell may include a bare cell, a top cover, and a housing. The housing has an opening, the housing being connected to the top cover, the top cover covering the opening to form an accommodating space with the housing, the bare cell being disposed in the accommodating space, the opening being located on a side of the housing with the largest area. A side of the bare cell is provided with an electrode lead-out member, the housing comprising an electrode component or the housing being connected to an electrode component, the electrode lead-out member being connected to the electrode component, and the electrode lead-out member being a bent structure.

Abstract: A battery cell is disclosed, where the battery cell includes: a housing, the housing including a bottom wall, a top plate, and a plurality of side walls, where the side walls connect the top plate and the bottom wall, and the bottom wall, the plurality of side walls, and the top plate form an accommodating space; a cell, disposed in the accommodating space; and a support plate, disposed in the accommodating space and is clamped between the side wall and the cell.

Abstract: Examples of the present application relate to a battery cell, a manufacturing method and a manufacturing system thereof, a battery, and a powered device. The battery cell includes: a shell, where the shell has a wall portion; an electrode assembly accommodated in the shell; and a pressure relief mechanism. The pressure relief mechanism is provided on the wall portion, the pressure relief mechanism includes a weak portion, a body portion, and a connecting portion. The weak portion is configured to be damaged when pressure inside the shell reaches a threshold so as to relieve the pressure. The body portion is located in a region defined by the weak portion. The connecting portion is located on an outer side of the weak portion and configured to connect the wall portion.

Abstract: A battery cell includes: a housing, where the housing forms an accommodating space; an electrode assembly, where the electrode assembly is disposed within the accommodating space; a top cover, where the top cover is connected to the housing and covers the accommodating space, the top cover is provided with a protrusion, the protrusion is located within the accommodating space, and the protrusion is configured to shield between the electrode assembly and at least a portion of the connection at which the top cover is connected to the housing.

Abstract: A case assembly, a battery cell, a battery, and an electrical apparatus are provided. The case assembly includes a case, a first terminal post, and an insulating sealing structure. The case includes a first case wall, the first case wall being formed with a first accommodating groove, and a bottom wall of the first accommodating groove being formed with a mounting through hole. The first terminal post includes a terminal post body and a first extension platform, the first extension platform being arranged on a side of the first case wall where the first accommodating groove is formed. The insulating sealing structure includes a first fitting structure, the first fitting structure being fitted between the first case wall and the first extension platform, and at least a part of the first fitting structure being accommodated in the first accommodating groove.

Abstract: This application relates to batteries and provides a battery cell, a battery, and an electric device. The electric device includes the battery, and the battery includes one or more battery cells. Each battery cell has a casing and an electrode assembly. At least part of the casing is made of steel, and the casing includes a body and a bottom that is located at one end of the body in a first direction and may be either separate from or integrated with the body. At least part of the body is welded, and the electrode assembly is positioned in a space enclosed by the body and the bottom. This structure allows the casing wall thickness to be reduced while maintaining strength, lowering casing weight and improving the energy density of the battery cell.

Abstract: A method for preparing multi-component polymers through post-polymerization modification, used to functionalize polysulfonyl imidate polymer including a dispersing polymer reactant, an electrophilic substitution reagent and a catalyst in an organic dispersant; adding acid-binding agent to react at room temperature for 4-48 h; obtaining the precipitate when the reaction finished; washing and drying the precipitate to get the functionalized multi-component polymers.

Abstract: Disclosed are a battery cell, a battery, and an electric device, where the battery cell includes a housing, an electrode assembly, a first insulating member, and an electrode terminal; the electrode assembly includes a tab; the housing is configured to accommodate the electrode assembly; the housing includes a wall portion; the first insulating member is disposed between the wall portion and the electrode assembly; the electrode terminal is disposed on the wall portion; and the electrode terminal passes through the first insulating member and directly connects with the tab.

Abstract: A battery cell includes: a case including a mounting wall; an electrode assembly disposed within the case; an explosion-proof valve disposed on the mounting wall; and a gas guide portion including a gas guide groove formed in the mounting wall, the gas guide groove being configured to guide gas generated by the electrode assembly toward the explosion-proof valve.

Abstract: Embodiments of this application provide a battery cell and a preparation method thereof, a battery, an electric apparatus, and an energy storage apparatus, improving the internal insulation performance of the battery cell. The battery cell includes: a housing; an electrode assembly, where the electrode assembly is accommodated in the housing; an electrode terminal, where the electrode terminal is disposed on the housing; and a connecting member, where the connecting member is configured to connect the electrode terminal and the electrode assembly and a first insulating portion is disposed on at least a portion of a surface of the connecting member facing the housing.

Abstract: A battery cell includes a housing, an electrode assembly, a one-way valve, and a cover member. The housing has a wall portion, the electrode assembly is accommodated within the housing, and the one-way valve is disposed on the wall portion. The one-way valve has an exhaust port, and the exhaust port is configured to discharge gas from inside the housing. The cover member is mounted on the wall portion. Along a thickness direction of the wall portion, the cover member is located on a side of the one-way valve facing away from the electrode assembly, and the cover member covers the one-way valve. An exhaust passage is formed between the cover member and the wall portion, and the exhaust passage communicates the exhaust port to an exterior of the housing.

Abstract: Embodiments of the present application provides a housing, a battery cell, a battery, and an electrical apparatus. The housing is provided with an opening, and comprises a first wall arranged opposite to the opening and at least two second walls, wherein the first wall and the second walls are arranged to intersect each other. A transition area is arranged between every two adjacent second walls among the at least two second walls, and the maximum thickness T1 of the transition area and the maximum thickness T0 of the second wall with the maximum thickness among the second walls meet: T1>T0.

Abstract: Embodiments of the present application disclose a battery cell, a battery, and a power consuming device. The battery cell includes an electrode assembly and a case. The electrode assembly includes a negative electrode plate. The negative electrode plate includes a negative electrode active material with a metal ion reversely deintercalated and intercalated. The negative electrode active material includes a silicon-based material. The case is configured to accommodate the electrode assembly. At least a portion of regions of the case has a yield strength of Re at a temperature of 25° C., where Re satisfies: 140 MPa?Re?1000 MPa.