Abstract: A battery includes a housing, a battery cell, and a first conductive member. The housing is provided with an accommodating cavity, and the battery cell is accommodated in the accommodating cavity. The first conductive member includes a first terminal part located outside the housing, and a first connecting part connected to the first terminal part and located inside the housing. The battery cell includes an electrode assembly and N first tabs protruding from the electrode assembly, where N is an integer greater than 1. The N first tabs are divided into M first tab groups. The first tab groups are mutually separately connected to one side of the first connecting part facing the electrode assembly. M is an integer greater than or equal to 1 and less than or equal to N.

Abstract: An electrochemical apparatus includes a housing, an electrode assembly disposed inside the housing, a first tab group, and a first adapting piece electrically connected to the first tab group and extending out from the housing. The electrode assembly is configured to be a winding structure including a first electrode plate. The first tab group includes M first tabs connected to the first electrode plate. A thickness direction of the electrode assembly is defined as a first direction. In the first direction, the electrode assembly includes N layers of the first electrode plate, N being greater than M. The M first tabs are each connected to the first electrode plate. A plane passing through a winding center axis of the electrode assembly and perpendicular to the first direction is defined as a winding center plane. The M first tabs are disposed on two sides of the winding center plane.

Abstract: An electrochemical apparatus includes a housing, an electrode assembly disposed inside the housing, a first tab group, and a first adapting piece electrically connected to the first tab group and extending out of the housing. The electrode assembly includes electrode plates comprising a first electrode plate and a second electrode plate, and a separator disposed between adjacent electrode plates. The first tab group includes a first connecting portion connected to the first adapting piece. The first tab group includes a plurality of first tabs connected to the first electrode plate and stacked on each other to form the first connecting portion. The first connecting portion includes a first portion. A thickness direction of the electrode assembly is defined as a first direction. In the first direction, the first portion is disposed between two adjacent layers of the electrode plates.

Abstract: A cell comprises a jelly-roll and a package wrapped around the jelly-roll. The jelly-roll is formed by winding a first electrode plate, a second electrode plate opposite in polarity to the first electrode plate and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate is closer to the package than the second electrode plate, and a side of the outermost circumference of the first electrode plate facing the package is an uncoated region. The package includes a metal layer electrically connected to a tab of the second electrode plate, the metal layer being spaced apart from the uncoated region.