Abstract: A passive thermal managing method adopts immersion cooling for a battery pack, comprising: providing a battery pack, comprising a thermal conducting shell, a plurality of battery cells, and a circulation space, wherein the battery cells and the convection space are in the thermal conducting shell; vacuuming the battery pack; immersing the battery cells with a dielectric liquid, wherein a natural circulation of the dielectric liquid is formed in the circulation space for transferring heat, wherein the dielectric liquid comprises a plurality of fillers for reducing a viscosity of the dielectric liquid.

Abstract: The invention provides a thermal managing system for a battery pack to prevent the thermal run away, comprising: a battery pack comprising a heat conducting shell; a vapor chamber module, comprising a evaporating surface and a condensing surface, wherein the evaporating surface is thermally connected to a corresponding area of the heat conducting shell, and a two-phase flow heat transfer between the evaporating surface and the condensing surface occurs in a direction one-way outwardly from the evaporating surface to the condensing surface; a phase change material module, comprising a container and a phase change material, wherein the container is thermally connected to the condensing surface and contains the phase change material, wherein when a phase change occurs, the phase change material comprises a latent heat, wherein the phase change material is capable of being heated by the two-phase flow heat transfer, wherein when the phase change material is melting, conducting dominates heat transferring rather t

Abstract: The invention provides a solar panel with a cooling device, comprising a solar panel with a substrate, a plurality of solar cells arranged on the substrate; a regenerative tank is stored with a Phase Change Material (PCM) inside; a pulsed heat pipe having a plurality of first bending section on one end of the pulsed heat pipe, and an extended section on the corresponding other end of the pulsed heat pipe to surround a plurality of second bending section; and a part of the extended section of the pulsed heat pipe is connected to the substrate of the solar panel, while the first bending section on the relative end of the extended section is extended into the regenerative tank and contacted with the phase change material. When the reduction of the temperature of the solar panel be achieved so that the efficiency of converting solar energy to electrical energy can be upgraded.