Electrical device and electrical equipment

Abstract

An electrical device characterized in that it comprises: at least two batteries, wherein the battery comprises a housing, a terminal connection and a clamping ring, the housing has a first wall, the terminal connection is arranged on the first wall, the clamping ring comprises a clamping section, a connecting section and a fastening section, wherein the fastening section is connected to the first wall, the connecting section connects the clamping section and the fastening section and is arranged surrounding the terminal connection, a part of the terminal connection is clamped between the clamping section and the first wall along a first direction, and the first direction is parallel to the thickness direction of the first wall; a busbar serving for the electrical connection of the terminal connections of at least two adjacent batteries;wherein the fastening section is welded to the first wall and forms a first melt zone, the depth of the first melt zone is D1 along the first direction, where D1 is specified in mm, the width of the first melt zone is L along a second direction, where L is specified in mm, the maximum distance between a projection center of the pole connection onto the first wall and the projection of the connection section onto the first wall is W, where W is specified in mm, and the following is satisfied: 0.005 ≤ L * D1 / W ≤ 0.53, where the second direction is perpendicular to the first direction.