ELECTROCHEMICAL DEVICE AND ELECTRICAL DEVICE

An electrochemical device includes a housing, an electrode assembly, a first tab, a second tab, and a third tab. The first tab and the second tab are connected to the first electrode plate. A protruding part of the second tab out of the housing is connected to a protruding part of the first tab out of the housing. Along a first direction, a projection of the protruding part of the first tab out of the housing overlaps a projection of the protruding part of the second tab out of the housing. By starting from a first leading end, the first tab is connected to the first electrode plate at a 10% to 60% point of a total length of the first electrode plate, and the second tab is connected to the first electrode plate at a 60% to 100% point of the total length of the first electrode plate.