Double-layered thermal interface material structure, manufacturing method thereof, and battery device having the same
View Patent ↗A double-layered thermal interface material (TIM) structure is disclosed. The double-layered TIM structure is adopted for being sandwiched between each two adjacent N rows of battery cells of a battery module. According to the present invention, the double-layered TIM structure comprises a layer structure comprising a top surface and a bottom surface, of which the top surface and the bottom surface both have a plurality of concave portions. Moreover, there is a supporting mesh plate buried in the layer structure for making the layer structure simultaneously possess advantages of softness, good malleability and good support capability. Therefore, when this novel double-layered TIM structure is adopted in assembling N rows of battery cells to become a battery module, there are no interfacial gaps between the two adjacent rows of battery cells and the double-layered TIM structure.
1 . A battery device comprising a double-layered thermal interface material structure for a stack type battery pack, comprising:
a layer structure, being made of a thermal interface material, and comprising a body thickness; and
a supporting mesh plate, being buried in the layer structure, and comprising a plate thickness that is smaller than the body thickness;
wherein the layer structure comprises a top surface and a bottom surface, wherein the top surface and the bottom surface respectively comprise a plurality of upper concave portions and a plurality of lower concave portions;
wherein the top surface comprises an upper heat conductive protection layer including a plurality of first ceramic fillers, and the bottom surface comprises a lower heat conductive protective layer including a plurality of second ceramic fillers;
wherein the upper heat conductive protection layer and the lower heat conductive protection layer both are made of a thermally conductive phase change material;
an upper row of battery cells, conforming the upper concave portions and disposed on the upper concave portions;
a lower row of battery cells, conforming the lower concave portions and disposed under the lower concave portions;
wherein the supporting mesh plate comprises a plurality of pores, and each of the pores being fully filled with the thermal interface material;
wherein, the supporting mesh plate provides a support capability to support the upper row of battery cells.
2 . The battery device comprising a double-layered thermal interface material structure of claim 1 , wherein the supporting mesh plate is made of at least one material selected from a group consisting of fiberglass, carbon fiber, polyvinylamine, carbon steel, stainless steel, copper alloy, and aluminum alloy.
3 . The battery device comprising a double-layered thermal interface material structure of claim 1 , wherein the thermal interface material comprises a polymer matrix and a plurality of thermal conductive filler spread in the polymer matrix, and the thermal conductive filler comprising at least one selected from a group consisting of metal oxide particles, nitride particles, carbide particles, diboride particles, graphite particles, and metal particles.
4 . The battery device comprising a double-layered thermal interface material structure of claim 1 , wherein the top surface and the bottom surface are both provided with a heat conductive protection layer thereon, and the heat conductive protection layer being made of a material selected from a group consisting of paraffin, epoxy resin, polyurethane, silicone, rubber, polypropylene, and thermally conductive phase change material.