Abstract: A battery cell includes a shell and at least one electrode assembly accommodated in the shell. The shell includes a first plate and a second plate, the second plate is intersected with the first plate for arrangement, the first plate includes a first inner wall surface facing the electrode assembly, and the second plate includes a second inner wall surface facing the electrode assembly. The shell includes a third inner wall surface connecting the first inner wall surface and the second inner wall surface, at least a part of the third inner wall surface defines a first avoidance groove, in a thickness direction of the first plate, the first avoidance groove is concave relative to the first inner wall surface and towards one side away from the electrode assembly, and a part of a projection of the electrode assembly on the first plate overlaps the first avoidance groove.

Abstract: The present application provides an end cover assembly, a battery cell, a battery, an electric device and a method for preparing a battery cell and an apparatus for manufacturing a battery cell. The present application provides an end cover assembly, where the end cover assembly includes: a cover plate provided with a pressure relief hole; a fixing member fixed on the cover plate, the fixing member having a first through hole and a second through hole, and the first through hole being opposite to the pressure relief hole; and a gas permeable membrane covering at least a portion of the pressure relief hole, an edge part of the gas permeable membrane being connected to the fixing member, and a portion of the edge part being embedded into the second through hole, so as to prevent the edge part from moving relative to the fixing member.

Abstract: The present application relates to an end cover assembly, a battery cell, a battery, a power consumption device and a liquid injection method. The end cover assembly includes an end cover, a sealing piece and a cover body, wherein the end cover is provided with a first hole for injecting electrolyte; the sealing piece is configured to seal the first hole; the cove body is configured to cover at least part of the sealing piece, the cover body is rotatable relative to the end cover to realize detachable connection between the cover body and the end cover; one of the sealing piece and the cover body is provided with a second hole, the other one of the sealing piece and the cover body is provided with a boss; the boss is inserted into the second hole, and the boss and the second hole are relatively rotatable.

Abstract: Embodiments of the application provide a battery cell, a battery and an electric apparatus. The battery cell comprises a first case, a first electrode assembly, a second case, a second electrode assembly, and an end cover assembly. The first case is provided with a first opening. The first electrode assembly is accommodated within the first case. The second case is provided with a second opening opposite the first opening. The second electrode assembly is accommodated within the second case. The end cover assembly covers the first opening and the second opening, the end cover assembly includes a connecting assembly, and the connecting assembly is configured to electrically connect the first electrode assembly and the second electrode assembly. The first case and the second case, which are sequentially arranged, can increase the overall size of the battery cell, thereby increasing the space utilization of the battery cell in the battery.

Abstract: An end cover assembly, a battery pack, a battery, and an electrical device are described. The end cover assembly comprises a first end cover, a second end cover, a first insulating member, an electrode terminal, and a collecting member; the first end cover is used to close an opening of a first case; the second end cover is used to close an opening of a second case; the first insulating member is disposed between the first end cover and the second end cover; the electrode terminal is mounted to the first end cover, the first insulating member, and the second end cover; the collecting member is embedded within the first insulating member and connected to the electrode terminal. The collecting member is embedded within the first insulating member. The collecting member is embedded within the first insulating member, which can further enhance insulation strength of the first insulating member.

Abstract: An end cover assembly includes an end cover, an electrode terminal, and a sealing member. The end cover is provided with a lead-out hole. The electrode terminal at least partially passes through the lead-out hole, and a sealing gap is formed between them. The electrode terminal has a combination interface, and the combination interface is connected to the sealing gap at a junctional position. The sealing member is arranged in the sealing gap to seal the electrode terminal and the end cover. In a direction from the inside of the first housing to the outside of the first housing along the sealing gap, the sealing member comprises a sealing starting section located upstream of the junctional position, where the length of the sealing starting section is d, and the thickness of the sealing starting section is t, with d>t.

Abstract: The present disclosure relates to a top cover assembly of a secondary battery and a secondary battery, wherein the top cover assembly includes a top cover plate, provided with a through hole; an electrode terminal, covering the through hole; an insulating plate, wherein at least part of the insulating plate is arranged on a side of the top cover plate away from the electrode terminal; a seal, wherein at least part of the seal is arranged between the top cover plate and the electrode terminal; and an insulator, wherein at least part of the insulator is arranged between the top cover plate and the insulating plate; wherein the insulator and the seal at least jointly enclose a side wall of the through hole and an area, close to the through hole, on an upper surface of the top cover plate.

Abstract: A sealing assembly for sealing a through hole, and a method and device for preparing a battery cell are provided. The sealing assembly comprises: a sealing sleeve provided in the through hole and having a cavity and an opening that is in communication with the cavity; an elastic sleeve tube provided in the cavity and having a first mounting hole that extends in an axial direction of the through hole; and a central rod, which is provided in the first mounting hole and is in threaded connection with the elastic sleeve tube to enable the elastic sleeve tube to expand in a radial direction of the through hole to press the sealing sleeve and form, on an outer wall of the elastic sleeve tube, a raised portion that rivets the sealing sleeve to the through hole.

Abstract: A battery cell comprises an electrode assembly, a case and an insulating member. The case is used for accommodating the electrode assembly and has a wall portion arranged opposite the electrode assembly in a first direction, the wall portion being provided with a first pressure-relief area. In the first direction, the insulating member is at least partially arranged between the electrode assembly and the wall portion to insulate and isolate the electrode assembly from the wall portion. The insulating member is provided with a second pressure-relief area at the position corresponding to the first pressure-relief area, and the first pressure-relief area and the second pressure-relief area are configured to be open when the battery cell releases pressure.

Abstract: An end cover assembly includes an end cover, a connecting element, and an electrode terminal. The end cover is configured to close an opening of a shell of a battery cell, and the end cover is provided with a terminal lead-out hole. The connecting element is arranged on a side of the end cover away from the shell in a thickness direction. The electrode terminal passes through the terminal lead-out hole and is connected to the connecting element, where the electrode terminal is configured to connect an electrode assembly of the battery cell to achieve an electrical connection between the connecting element and the electrode assembly. In the thickness direction of the end cover, the perimeter of an outer surface of the end cover is L1, the connecting element has a butting surface away from the end cover, and the perimeter of the butting surface is L2, which meet: L2/L1?0.25.

Abstract: An end cover assembly includes a first end cover closing an opening of a first case, a second end cover closing an opening of a second case, an electrode terminal including a terminal body passing through the first and second end cover, and an acquisition member including a main body portion and a connecting portion. In a first direction, the main body portion is stacked between the first and second end covers. The connecting portion is connected to and extends from the main body portion in the first direction, and is connected to the terminal body to achieve electrical connection between the acquisition member and the electrode terminal. The connecting portion of the acquisition member extends from the main body portion in a stacking direction of the first end cover and the second end cover, and the connecting portion is connected to the terminal body of the electrode terminal.

Abstract: A bottom support plate configured to support an electrode assembly in a battery cell includes: a bottom support plate body; a connecting plate, wherein the connecting plate is arranged on the lower surface of the bottom support plate body, and an exhaust groove is formed between an edge of the connecting plate and the lower surface of the bottom support plate body, the exhaust groove runs through the peripheral edge of the bottom support plate body at least along a first direction and a second direction, the first direction and the second direction are both perpendicular to the thickness direction of the bottom support plate body, and the exhaust groove is configured to communicate with a gap between a shell and an insulating sleeve film of the battery cell. The exhaust groove of the present application runs through the peripheral edge of the bottom support plate body.

Abstract: This application provides a battery cell, a battery, an electrical device, and a method for preparing a battery cell. The battery cell includes a shell and an electrode assembly. The shell provides an accommodation space. The shell includes a first plate portion and a second plate portion. The first plate portion is welded to the second plate portion to form a molten pool structure and welding pores located in the molten pool structure. The electrode assembly is accommodated in the accommodation space. A thickness of the first plate portion is greater than a thickness of the second plate portion. At least a part of the welding pores are located in the first plate portion.

Abstract: A battery cell, a battery, and an electrical device are described. The battery cell includes a housing, an end cap, and an electrode terminal. An opening is created on the housing. The end cap is configured to fit and cover the opening. The electrode terminal is disposed on the housing. The end cap is a largest-area wall of the battery cell. By making the end cap be the largest-area wall of the battery cell, this application increases the area of the opening, facilitates a structure in the battery cell to enter the housing, increases the assembling speed during assembling, and in turn, improves production efficiency of the battery cell.

Abstract: An end cover assembly includes: an end cover with a through hole for injecting electrolyte and a first clamping portion, wherein the first clamping portion is disposed along a circumferential direction of the through hole and is located on one side of the end cover away from an interior of the battery cell; a sealing ring for sealing the through hole; and a pressure relief device covering at least part of the sealing ring and closing the through hole; wherein the pressure relief device includes a second clamping portion, and is rotatable such that when the pressure relief device is rotated to a first position, the second clamping portion is clamped with the first clamping portion; and when the pressure relief device is rotated to a second position, the second clamping portion is disengaged from the first clamping portion.

Abstract: The present disclosure provides a top cover assembly for a battery, a battery and a device using a battery as a power source. The top cover assembly includes: a cover plate body having a liquid injection hole; a mounting part configured to be connected with the cover plate body and arranged around the liquid injection hole; a sealing element configured to be connected with the mounting part, wherein the sealing element includes a first top wall and a first side wall connected to the periphery of the first top wall, the first top wall is configured to cover the liquid injection hole, and the first side wall is configured to be in press fit with the mounting part to achieve sealing of the liquid injection hole; and a fixing element configured to be connected with the cover plate body and to fix the sealing element to the mounting part.

Abstract: This application discloses a housing, a battery cell, a battery, and an electric device, and pertains to the field of battery technologies. The housing has at least three edge portions intersecting at a same vertex. An indentation groove is provided on the housing, and the indentation groove intersects with at least two of the edge portions. Because the region near the edge portion of the housing has strong deformation resistance, the probability of abnormal cracking of the indentation groove due to creeping of the region in which the indentation groove is provided on the housing is reduced, thereby prolonging service life of the battery cell.

Abstract: An end cap assembly, a battery cell, a battery, battery cell manufacturing equipment and method are provided, which belong to the technical field of batteries. The end cap assembly includes an end cap, an electrode terminal and a connector. The end cap is provided with an electrode lead-out hole which penetrates the end cap in a thickness direction of the end cap. The connector is configured to connect the end cap to fix the electrode terminal. The electrode terminal is provided opposite to the electrode lead-out hole, and a projection of the electrode terminal in the thickness direction does not overlap with a projection of the end cap in the thickness direction, thus a radial size of the electrode terminal is smaller, which reduces the space occupied by the electrode terminal, saves material and has better economy.

Abstract: This application provides a battery cell, a battery, and an electric apparatus. The battery cell includes a housing, an electrode terminal, and a current collector. The housing has a first wall and an accommodating cavity. The first wall has a first through hole enabling communication between the accommodating cavity and the outside of the housing. The electrode terminal includes a base and a connection portion connected to the base. The base is located on a side of the first wall back away from the accommodating cavity. At least part of the connection portion is located in the first through hole. The current collector includes a body portion and a protruding portion connected to the body portion. The protruding portion protrudes towards the first wall, and the protruding portion is configured to be connected to the connection portion.

Abstract: This application provides a battery cell, a battery, and an electrical device. A battery cell, including a top cover assembly and an adapter component, where the top cover assembly includes a mounting hole, and the mounting hole penetrates the top cover assembly along a first direction. The adapter component includes a base portion and a connecting portion that protrudes beyond the base portion. The connecting portion is disposed in the mounting hole and spaced apart from the mounting hole. The top cover assembly includes the mounting hole that penetrates the top cover assembly along the first direction, and the mounting hole is configured to accommodate the adapter component. The adapter component is configured to connect an electrode assembly to an electrode terminal in the battery cell. The adapter component includes the base portion and the connecting portion that protrudes beyond the base portion.