WO WO2026156862A1
The present application relates to a thermal insulation member (200), a battery device (20), and an electric device. The battery device (20) comprises at least two battery cells (100) and a thermal insulation member (200). The thermal insulation member (200) is provided on at least one side of at least one battery cell (100) in a first direction, wherein the thermal insulation member (200) has a low foaming structure (201) and a high foaming structure (202), and the density of the high foaming structure (202) is less than that of the low foaming structure (201). The thermal insulation member (200) comprises a plate body, wherein the plate body is made of a foaming material, the plate body has the low foaming structure (201) and the high foaming structure (202), and the density of the high foaming structure is less than that of the low foaming structure. The electric device comprises the battery device (20). In the thermal insulation member (200), the battery device (20), and the electric device, while the low foaming structure (201) limits the expansion and deformation of the battery cells, the high foaming structure (202) can provide a release space for the expansion of the battery cells (100).
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