Battery cell, battery device and electrical device

Abstract

The present application relates to a battery cell, a battery device and an electrical device, and belongs to the technical field of batteries. The battery cell comprises a housing and an electrode assembly; the housing contains an electrolyte; the electrolyte has lithium ions; the housing is provided with a positive electrode lead-out portion; the electrode assembly comprises a positive electrode sheet; the positive electrode sheet comprises a positive electrode current collector, a positive electrode conductive member and a positive electrode active material layer; an aluminum layer comprises a main body portion and a connection portion; at least part of the main body portion is covered with the positive electrode active material layer, and the connection portion is not covered with the positive electrode active material layer; the connection portion comprises a first connection sub-portion and a second connection sub-portion; the first connection sub-portion is connected between the main body portion and the second connection sub-portion; the positive electrode conductive member is electrically connected to the surface of the second connection sub-portion facing away from a support substrate; the positive electrode sheet further comprises a blocking member; the blocking member covers at least a partial region of the surface of the first connection sub-portion facing away from the support substrate.

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