Abstract: A battery device includes a case, a cell disposed within the case, and first and second conductive tabs each electrically connected to the cell and partly enclosed by the case. The first conductive tab has an elastic portion exposed from the case and compressible or stretchable when a force is applied thereto. By having the elastic portions that are elastically deformable, the effects of push or pull resulting from the swelling of the cell and case on the conductive tabs may be reduced. Consequently, damages or breakages of the conductive tabs can be avoided and the safety of battery device may be improved.

Abstract: The present application is concerned with a battery module including a plurality of cells sequentially disposed in a laminated mode and at least one buffer member. The buffer members are disposed between at least two of the plurality of cells, and the buffer members can elastically deform to provide an expansion space when the cells expand, and restore when the cells contract. At least one of the thickness, length and width of the buffer members is related to corresponding one of the thickness, length or width of the cells. When deforming within a strain range of 0% to 85%, the buffer members provide an acting force of 0 to 1 Mpa.

Abstract: The present disclosure relates to the field of ceramics, and discloses a metal-based aluminum nitride composite material. The composite material includes an aluminum nitride ceramic skeleton and a metal filling at least part of pores of the aluminum nitride ceramic skeleton. The aluminum nitride ceramic skeleton contains aluminum nitride and CuAlO2, and the aluminum nitride ceramic skeleton has a porosity of 20 to 40 percent. The present disclosure further discloses a method for preparing the metal-based aluminum nitride composite material and the metal-based aluminum nitride composite material obtained by the method. A CuAlO2 substance is formed in the aluminum nitride ceramic skeleton obtained in the present disclosure.