Protection structure forthermal dissipation and preventing thermal runaway diffusion in battery system

A protection structure configured to thermal dissipation and prevent thermal runaway diffusion in a battery system, the protection structure comprising:

• a battery pack casing disposed with a plurality of battery modules;
• and
• at least one composite heat conduction plate, located within the battery pack casing, contacted with the battery pack casing, and sandwiched between at least two of the battery modules, wherein the composite heat conduction plate is a multilayer anisotropic heat conduction structure, and the composite heat conduction plate comprises:
• two layers of the heat conduction layer;
• a plurality of structural supports disposed between the heat conduction layers to support the heat conduction layers and form a plurality of internal spaces;
• and
• a heat insulation material filled in the internal spaces as the heat insulation layer.