Battery device, electric device, and energy storage device

Abstract

This application provides a battery device, a power-consuming device, and an energy storage device. The battery device includes a casing and a pouch battery cell. The casing includes a support plate. The pouch battery cell includes a first surface and a second surface, with multiple first surfaces arranged opposite each other along a first direction, and the support plate and multiple second surfaces arranged opposite each other along a second direction. The pouch battery cell includes a packaging bag, an electrode assembly, a negative terminal, and a first insulating member. The electrode assembly includes a negative electrode sheet, which includes a negative current collector and a negative electrode film. The negative terminal is connected to the negative current collector. The first insulating member is disposed between the negative terminal and the packaging bag, and is sealed to the packaging bag to form a first connection portion. The negative electrode film includes a negative electrode active material, with a volume distribution particle size Dv50 of 9μm-17μm and a volume distribution particle size Dv10 of 3μm-9μm. The dimension of the first connection portion along a third direction is 2mm-6mm.

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