Design of Heat Pipes and Vapor Chambers for EV Battery Cooling

Battery module with integrated vapor chambers for efficient cooling of the battery cells. The battery module has multiple vapor chambers filled with a working fluid placed between the battery cells. These chambers absorb heat from the cells, convert it to vapor, and transfer it to a heat transfer interface material. The interface material then channels the heat to an external cooling system. The vapor chambers circulate the working fluid between liquid and vapor states to efficiently cool the cells.

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Power battery module system with improved thermal management using high thermal conductivity vapor chambers. The system has a housing enclosing multiple battery cells. Vapor chambers are sandwiched between adjacent cell surfaces and the housing. The vapor chambers have lower thermal resistance compared to conventional methods. Thermal grease is used between the chambers and housing contact points. This provides uniform and efficient heat transfer between cells and reduces temperature differences inside cells.

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Battery for electric vehicles that prevents hot spots and provides homogenous cooling without active cooling systems. The battery has passive cooling loops between the cell stack and casing. Each cell has a loop heat pipe, oscillating heat pipe, or heat pipe. The loops have evaporators in the cell stack and condensers in the casing. The loops circulate phase change fluid between the stack and casing to extract heat. The loops have U-shaped ducts in the stack and casing sections to connect evaporator and condenser. This provides thermal contact and circulation between stack and casing to distribute heat.

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A thermal management system for battery packs in electric vehicles that provides uniform cooling and improves battery performance. The system uses planar heat pipes in direct contact with the battery packs to draw heat out, and heat sinks on the edges of the heat pipes to dissipate the heat. The heat pipes have opposed contact regions on the battery packs to balance heat distribution. The heat sinks have varying cooling performance to further optimize cooling.

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Battery cooling structure using a T-shaped vapor chamber to improve cooling performance of batteries in high power applications where traditional flat plate vapor chambers can overheat. The T-shaped chamber has a bottom section that connects to the battery and transfers heat from the bottom of the battery. This prevents hot spots and allows even cooling. The top section radiates the heat to the surrounding environment. The T-shape allows the bottom section to soak up heat from the battery while the top section radiates it away, improving overall cooling compared to just a flat plate chamber.

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Battery module with improved heat dissipation using an internal heat pipe network to effectively cool the battery cells. The heat pipe structure has a vacuumized sealed tube above the battery holder to transfer heat by evaporating and condensing fluid. It also has a section inserted between adjacent cells to absorb cell heat. Connections between the sections allow heat transfer. This allows peripheral cell heat to be extracted and radiated by the top section.

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A battery module heat dissipation device for power batteries in electric vehicles that uses a U-shaped vapor chamber to quickly and evenly dissipate heat from the batteries. The device consists of a U-shaped heat absorber plate attached to the battery, and a condensing plate connected to a liquid cooling system. The absorber plate has evaporation ends on the battery sides and a condensation end at the bottom. The evaporation ends absorb battery heat, vaporizing a working fluid inside the U-shape. The vapor condenses on the cooling plate, transferring the heat to the liquid. This provides fast and uniform battery cooling to prevent overheating and thermal runaway.

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Battery module for electric vehicles that improves heat dissipation without adding complexity or cost. The module has a battery cell and a heat pipe with an evaporator and condenser. The evaporator is thermally coupled to the battery cell but electrically isolated. Uniquely, the evaporator forms a housing around the battery cell to enhance heat transfer. This improves cooling compared to just attaching the evaporator to the cell surface.

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Flat heat pipe cooling system for electric vehicle batteries that provides better thermal management compared to traditional liquid or air cooling. The system uses flat heat pipes to transfer heat between battery modules and a central cooling unit. The pipes are sandwiched between the modules or attached to one side of a module. This allows efficient heat transfer between modules and prevents hotspots. The central cooling unit has fins, fans, and heat exchange media to dissipate heat. It provides uniform temperatures across modules and prevents thermal runaway propagation. The flat heat pipe system is compact, simple, and convenient to assemble compared to liquid or air cooling systems.

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A flat heat pipe for power battery cooling that improves heat dissipation efficiency compared to traditional heat pipes. The flat heat pipe has a housing with a cavity and a liquid storage tank at the bottom. When the housing contacts the battery pack, heat from the pack increases the pressure in the housing. This causes the liquid to flow from the tank towards the pack side of the housing, absorbing heat as it vaporizes. The vapor then condenses back into liquid on the other side of the housing and flows back to the tank. This continuous loop transfers heat from the battery pack to the housing walls and back into the liquid, increasing overall heat dissipation efficiency.

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Heat dissipation assembly for battery packs in electric vertical takeoff and landing (eVTOL) aircraft to improve cooling efficiency and reduce weight compared to liquid cooling. The assembly uses vacuum-sealed chambers filled with coolant that vaporizes at low temperatures. Soaking plates between battery cells contact their surfaces to increase heat transfer area. The vacuum chambers have fins for additional heat transfer. The coolant vaporizes in the chambers, enters the vacuum of the other chamber, condenses, and returns. This cycle extracts heat from the batteries without complex liquid systems.

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Thermal management system for battery packs that provides better temperature control compared to conventional methods. The system uses a vapor chamber filled with a working fluid that undergoes phase changes to absorb or release heat from the battery cells. The cells are positioned inside the chamber with wicking material between them and the fluid. This allows the fluid to carry heat away from the cells during charging/discharging. The chamber can be connected to a heat pump for active cooling. The wicking material quantity is customized for cells at different locations to optimize cooling.

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Battery module with improved heat dissipation using a heat pipe structure. The module has a shell, battery fixation frame, battery cores, and an improved heat pipe. The pipe has sections for absorbing core heat, conducting it upward, and condensing/evaporating fluid to transfer heat. This allows the core heat to be taken away and radiated. The pipe is above the core section and connects there.

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Automobile battery cooling system and vehicle that prevents battery overheating and thermal runaway. The cooling system involves inserting a heat pipe directly into the battery module and attaching it to the battery core. This allows rapid heat transfer between the core and the heat pipe, preventing hot spots and uniformizing core temperatures. The heat pipe can then be cooled externally to prevent overall module overheating. The direct core contact and heat pipe uniformization prevent piling up of heat in the battery core and reduce the risk of thermal runaway.

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A thermal management structure for battery packs that improves cooling efficiency and reduces temperature variability. The structure uses a heat pipe attached to the battery module. The heat pipe has an evaporation section, condensation section, and adiabatic section in between. The evaporation section absorbs heat from the module, and the condensation section releases it to the surroundings. The adiabatic section prevents condensation. The heat pipe connects to a heat conduction structure like glue or fins on the pack housing. This allows the condensation segment to transfer heat to the housing for dissipation, improving overall cooling.

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Heat management system for battery modules in electric vehicles that reduces energy consumption and improves safety. The system uses a heat pipe with contact surfaces on the sides and bottom of the battery cell. This allows heat generated during charging and discharging to be transferred to the pipes and then to a liquid cooling plate below. This prevents heat buildup inside the cell and reduces the temperature difference across the module. The pipes also prevent hotspots near the electrodes.

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Integrated liquid cooling and heat pipe design for battery packs to improve cooling efficiency and temperature uniformity. The design involves fixing a liquid cooling plate on the top of the battery module and a heat pipe on the side and top surface. The heat pipe contains coolant and transfers heat from the side of the module to the cooled plate. This direct connection eliminates air gaps and reduces thermal resistance compared to separate liquid and plate components. It allows better heat extraction from the battery cells and more uniform cooling.

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Battery cooling system for electric vehicles that improves efficiency and reduces space requirements compared to conventional cooling methods. The cooling system uses heat pipes with an internal working fluid to transport heat away from the battery cells. The cells are positioned inside the heat pipes so they directly contact the internal condensate channels. This allows direct heat transfer between adjacent cells through the condensate channels. The vapor channels are offset to alternate between cells. This enables efficient heat transfer between cells while minimizing the number of external connections needed compared to connecting the heat pipes directly to each cell.

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Battery cooling device for electric vehicles that cools the battery when it gets too hot during charging and discharging. It uses a heat pipe inside the battery pack to transfer heat from one side to the other. A separate cooling unit cools part of the heat pipe to further reduce battery temperature. This improves battery efficiency and lifespan by preventing overheating.

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Battery cooling system for electric vehicles that efficiently cools batteries during charging and discharging to improve performance and lifespan. The system uses a heat pipe inside the battery pack to transfer heat from the cell to an external cooling unit. Another heat pipe cooling unit inside the pack further cools the heat pipe. This dual-stage cooling is more effective than just an external unit. The system also allows applying heat when ambient temps are lower than optimal charging/discharging temps to compensate.

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