Abstract: A button cell includes an electrode assembly, a first electrode tab, and a housing provided with an accommodating cavity. The housing includes a first wall, a first end of the first electrode tab is connected to the electrode assembly, and a second end of the first electrode tab is connected to the first wall. The housing is provided with a groove including at least two continuously connected curves. Viewed from a direction perpendicular to the first wall, a projection of the first electrode tab on the first wall is a first projection, at least a portion of the at least two continuously connected curves is located outside the first projection, and a quantity of intersection points between a contour of the first projection and the at least two continuously connected curves is less than or equal to 2.

Abstract: A button cell includes an electrode assembly, a first housing, and a second housing, where the first housing and the second housing are connected and mated to form an accommodating space. The electrode assembly is disposed in the accommodating space. The first housing includes a first bottom wall and a first side wall connected to the first bottom wall. The first bottom wall is provided with a groove. A size of the first bottom wall in a first direction is T ?m, and a size of the groove in the first direction is H ?m, where 0.1T?H?0.7T and the first direction is perpendicular to the first bottom wall.

Abstract: A battery includes an electrode assembly, a first housing, and a second housing. The first housing includes a first bottom wall and a first peripheral wall. The second housing includes a second bottom wall and a second peripheral wall. The first peripheral wall is arranged outside the second peripheral wall in a sleeving manner. Here, the second peripheral wall includes a first annular segment and a second annular segment, the second annular segment is located on one side of the first annular segment back away from the second bottom wall, the first annular segment is spaced apart from the first peripheral wall with a spacing of T1, the second annular segment is spaced apart from the first peripheral wall with a spacing of T2, and 30%?T2/T1?95%.

Abstract: A battery includes an electrode assembly, a first housing, a second housing, and a first adhesive layer. The first housing is connected to the second housing. The first adhesive layer is located between the first housing and the second housing, the first adhesive layer includes a first section, a second section, and a third section, a boundary point between the first section and the second section is at a position from the bottom of the first adhesive layer to a distance of H/4 from a second end surface of the battery, and a boundary point between the second section and the third section is at a position at which an end of the second housing close to the first end surface is located. Thickness of the first section, thickness of the second section, and thickness of the third section are all different.

Abstract: An electrochemical device includes an electrode assembly. The electrode assembly is formed by winding a stacking body. The stacking body includes a first electrode plate, a second electrode plate and a separator film. The first electrode plate includes a first conductive layer, a first conductive material layer and a first layer. The first conductive layer includes a first surface and a second surface arranged oppositely in a third direction, wherein the first surface includes a first region and a second region arranged sequentially in a first direction. The first conductive material layer is disposed in the first region. The second region is exposed from the first conductive material layer. The first conductive material layer includes a first conductive material region and a first edge region, the first conductive material region and the first edge region are arranged sequentially along a second direction.

Abstract: An electrode assembly includes a first conductive portion, a second conductive portion and a first metal portion. The first conductive portion includes a first region provided with a conductive material layer and a second region separated from the first region; the first metal portion is welded with the second region, and the first metal portion has a third region where a weld mark is formed; when being observed in a first direction perpendicular to a first surface of the first conductive portion, the second region has a first end and a second end; the third region has a third end and a fourth end; the first metal portion has a fifth end in a second direction, and a sixth end disposed on an opposite side of the fifth end in the second direction and closer to the second end than the fifth end.

Abstract: An hard shell battery includes a housing, an electrode assembly, a first gasket, a second gasket, a conductive member, and a fastening member. The first gasket is disposed on an outer surface of the housing, and the second gasket is disposed on an inner surface of the housing. The conductive member is electrically connected to the electrode assembly, a shaft portion of the conductive member extends through a through hole in the housing into an accommodating cavity of the housing. A restraint portion of the conductive member abuts on a side of the first gasket facing away from the accommodating cavity. The fastening member is disposed on a side of the second gasket facing away from the first gasket, and in interference fit with the shaft portion via a mounting hole. The conductive member and the fastening member jointly press against the second gasket.

Abstract: An electrochemical apparatus including a housing, an electrode assembly, and a first conductive plate. The electrode assembly is disposed in the housing. The conductive plate is electrically connected to the electrode assembly and extends out from the housing. The electrochemical apparatus further includes a first layer, where an extending direction of the conductive plate is a first direction, and in the first direction, the first layer includes a first region and a second region connected to each other, the first region being disposed inside the housing, and the second region being disposed outside the housing. A direction perpendicular to a surface of the conductive plate is a second direction, and viewed along the second direction, the second region partially overlaps the conductive plate. The second region includes a first protrusion and a second protrusion. In a third direction, the first protrusion is separated from the second protrusion.

Abstract: A battery includes a housing, an electrode assembly, a first layer and a second layer. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator. The electrode assembly is wound. The first electrode plate includes a first edge and a second edge disposed opposite to each other along a winding direction and includes a first ending end towards the second edge. Viewed along a first direction, the electrode assembly includes a first surface. The second edge divides the first surface into a first region and a second region. The first region is a region containing the first ending end. The first layer is fixed to the first region and the second region. The second layer is fixed to the first surface and at a distance from the first layer, and the second layer bonds and fixes the electrode assembly to the housing.

Abstract: A battery including a housing, an electrode assembly, and tabs. The housing includes a first end wall, a second end wall, and a connecting wall portion. Both the first end wall and the second end wall are L-shaped and spaced apart in a thickness direction of the battery. The connecting wall portion extends from an edge of the first end wall toward the second end wall and encloses an L-shaped accommodating cavity, where the first end wall is provided as one end of the accommodating cavity, and the second end wall is provided as another end of the accommodating cavity.

Abstract: An electrode assembly formed by winding a stack. The stack includes a first conductive layer, a second conductive layer, and a first layer disposed therebetween. The stack further includes a first surface, a first end portion, and a second end portion located opposite to the first end portion. A stacking direction of the stack is a first direction. Viewed along the first direction, the first surface has, in a second direction perpendicular to the first direction, a first region located on one side of the first end portion and a second region located on the other side of the first end portion. In a winding direction of the stack, the first region is closer to the first end portion than the second region.

Abstract: An electrode assembly includes a stacked portion and a second layer. The stacked portion includes a first layer disposed between a first conductive layer and a second conductive layer. The stacked portion is a wound structure including a first surface and a first end portion. The second layer is connected to the first surface. When viewed in the first direction, the first surface has a first region located on a first side of the first end portion and a second region located on a second side of the first end portion. In a second direction perpendicular to the first direction, the first side and the second side are located on two opposite sides of the first end portion. When viewed in a winding direction of the stacked portion, the second region is closer to the first end portion than the first region.

Abstract: An electrochemical apparatus includes an electrode assembly and a conductive plate. The electrode assembly is of a wound structure and includes a first electrode plate including a first conductive layer and a first conductive material layer. The first conductive layer includes a first surface and a second surface. The first conductive material layer is provided on the first surface. The first surface includes a first region. The conductive plate is connected to the first region and extends out of the first electrode plate. The conductive plate includes a third region and a fourth region connected to each other. The third region includes a connection region. The conductive plate is connected to the first region through the connection region. The third region includes a first side, a second side, a third side, and a fourth side. The first region includes a fifth side, a sixth side, and a seventh side.

Abstract: A battery includes a housing; an insulation member; and a first active substance layer and a second active substance layer having opposite polarities. The housing includes a first wall body, a second wall body, and a third wall body, forming an accommodation cavity. The first wall body is a conductive wall body and disposed opposite to the third wall body. The insulation member, the first active substance layer, and the second active substance layer are accommodated in the accommodating cavity. The second active substance layer is disposed on a surface of the first wall body that faces the third wall body. The first active substance layer is disposed between the second active substance layer disposed on the surface of the first wall body and the third wall body. The insulation member is disposed between the first active substance layer and the second active substance layer.

Abstract: A battery including a first conductive part, an electrode assembly, a second conductive part, and a first layer. The first conductive part includes a cover part and a concave part connected to the cover part. The concave part includes a first wall and a first side wall connected to the first wall. The electrode assembly is electrically connected to the first conductive part and the second conductive part, and is configured inside the concave part. Viewed in a first direction, the second conductive part and the electrode assembly partly overlap, the second conductive part is located in the first conductive part, the second conductive part includes a first surface and a second surface, and the second surface faces away from the first conductive part. The first layer includes a part located between the first conductive part and the second conductive part; and an insulating material.

Abstract: A battery including a first conductor and a first conductive material layer. The first conductor includes a first surface and a second surface. The first surface and the second surface are two opposite surfaces of the first conductor. The first conductive material layer is disposed on the first surface. The first conductive material layer includes a first recess. The first conductor further includes a first region and a second region. A first preset spacing exists between the first region and the second region. The first region is exposed from the first recess. The second region is provided without the first conductive material layer. The battery further includes a first conductive plate. In the second region, the first conductor is connected to the first conductive plate.

Abstract: An electrode assembly comprises: a first electrode plate, a second electrode plate and a first layer containing an insulating material, the first layer is sandwiched between the first electrode plate and the second electrode plate, and the first electrode plate, the second electrode plate and the first layer are stacked and then partially folded back to form the electrode assembly; the first electrode plate includes a first surface and a second surface that are opposite to and connected with each other, the first surface and the second surface are formed by the folding-back and separated by an inflection point of the folding-back; a first distance is provided between the first surface and the second surface in a first direction; the first distance is different along a second direction perpendicular to the first direction.

Abstract: A cell, including an electrode assembly and a shell. The electrode assembly includes tabs, and the electrode assembly is disposed in the shell. The shell includes a packaging part and a sealing part connected to the packaging part, where the sealing part is formed by extending the packaging part outward, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part. The packaging part includes a side wall, where notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall.

Abstract: A battery includes an electrode assembly; and a housing assembly made of a conductive material for accommodating the electrode assembly. The housing assembly includes a first housing and a second housing electrically insulated from each other. The electrode assembly includes a first electrode plate having a first current collector and a first active material layer; a second electrode plate having a second current collector and a second active material layer; and a separator. The first current collector includes a first blank foil region located at an edge region of the first current collector, extending from a winding start end toward a winding termination end of the first electrode plate and electrically connected to the first housing. The second current collector includes a second blank foil region located at a winding start end and/or a winding termination end of the second electrode plate; and electrically connected to the second housing.

Abstract: An electrochemical apparatus including an electrode assembly including a first electrode plate, a second electrode plate and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate includes a current collector and an active material layer, the current collector includes a first zone and a second zone, the second zone is provided with an active material layer, the first zone includes a third zone and a fourth zone, the third zone is arranged in overlap with the separator, and the fourth zone is provided with a conductive layer. The conductive layer is disposed in a zone of the current collector that has no active material layer disposed thereon and that does not overlap the separator.