Immersion Cooling for EV Battery Temperature Control

Immersed battery pack and energy storage system with improved temperature consistency and uniformity for better safety and performance. The immersed battery pack has battery modules placed side by side with gaps between them. Coolant injection ports in the gaps spray liquid into the gaps to fully surround and cool the battery cells. This prevents local hotspots and ensures consistent temperatures across the pack. The coolant channels are integrated into the pack base for cost savings. The immersed pack is contained in a housing to prevent coolant leakage and increase contact area.

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Liquid-cooled battery cooling system for electric vehicles with improved heat dissipation efficiency and reduced temperature variations between battery cells. The system maximizes the thermal contact area between the battery cells and the cooling liquid by using a unique design of the battery module and heat dissipation shell. The battery cells are mounted in a module with fins that protrude into the cooling liquid tank. Thermally conductive glue between the cells and fins provides direct contact. This increases the heat transfer area compared to just cooling the outer surfaces. The fins also promote even distribution of cooling liquid flow. The shell surrounds the module and provides additional cooling passages for the liquid.

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Immersed liquid-cooled battery module for improving cooling efficiency and preventing thermal runaway of lithium-ion batteries. The module has a housing filled with a coolant that surrounds the battery cells. The cells are mounted on a heat sink plate inside the housing. A reciprocating assembly with a swinging fin moves back and forth to create turbulence in the coolant. This enhances heat transfer from the cells to the coolant. A limit assembly prevents the reciprocating assembly from skewing and ensures stable meshing of the gears. The limit assembly has a limit chute and slider that restricts the movement of the reciprocating assembly to prevent skewing. This allows the gears to mesh properly for consistent operation.

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Cooling device for battery cells that improves heat dissipation and cooling efficiency compared to traditional serpentine tubes. The device consists of a multi-piece shell with integrated cooling channels. Battery cells are installed inside the shell cavity. The shell wraps around the cell perimeter and makes direct contact. Coolant flows through the channels to extract heat from the cells. The shell provides uniform, efficient heat transfer due to the large surface area contact. The design avoids the need for extra brackets and reduces assembly steps compared to separate cooling tubes.

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Liquid cooling energy storage electric box composite thermal management system with heat pipes for heat dissipation of lugs. It aims to improve heat dissipation efficiency and uniformity for battery packs by using heat pipes between lugs and liquid cooling plates inside the pack enclosure. This allows direct cooling of the lugs where high temperatures occur, as well as overall pack cooling. The heat pipes transfer heat to the upper and lower cooling plates which are connected to an external liquid supply and return system.

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An active liquid cooling system for electric vehicle battery packs using high thermal conductivity aluminum cold plates with unique design features to improve cooling performance, uniform temperature distribution, and avoid thermal runaway. The cold plates have a height of 30-60 mm and a contact angle of 120-150 degrees between the plates and battery cells. This design lowers the highest pack temperature, provides uniform cooling, and handles rapid discharge and load changes. The increased plate height and angle in the flow direction enhances cooling by lowering temperature gradients and providing more surface area.

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Liquid-cooled battery pack for energy storage that uses immersion cooling with a non-flammable fluorinated liquid to prevent thermal runaway and improve safety. The battery modules are fully submerged in the liquid instead of using external cooling. This direct contact cooling provides efficient heat transfer without temperature differences between modules. The liquid has a large latent heat of vaporization to absorb and dissipate battery heat. The enclosure contains the liquid and uses heat pipes and radiators to transfer the heat outside.

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Battery module design for high energy density applications like electric vehicles that improves cooling efficiency and stability compared to conventional battery packs. The module uses a unique immersion cooling configuration where some portion of the battery cells are submerged in a cooling liquid. This allows direct cooling of the cells instead of relying on external radiators. The cells are inserted into a partition wall with a sealed hole that allows immersion. This prevents the liquid from shorting the cells. The partition separates the cells into upper and lower parts with the immersion section in the middle. Coolant flows around the submerged cells to extract heat. This provides more effective cooling compared to traditional radiators since the liquid can be in direct contact with the cells.

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Battery thermal management system for electric vehicles using immersion cooling to efficiently cool the batteries and prevent overheating. The system involves submerging the batteries in a non-conductive liquid, circulating the liquid to extract heat, and using an external heat exchanger to further dissipate it. This provides a closed loop immersion cooling system for the batteries. The liquid submergence and circulation prevents direct air cooling that can be less effective. The liquid cooling allows higher battery density and capacity without overheating.

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Battery cooling device for electric vehicles with high capacity and fast charging batteries to prevent thermal runaway and degradation. It uses cooling channels in the upper and lower portions of the battery cell stack. Gap fillers between the cells and channels transfer heat. This reduces temperature differences between top and bottom of cells and allows rapid cooling of cells when charging currents increase. It prevents cell degradation and durability issues caused by non-uniform heating. The channels connect to a cooling system to extract heat.

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Lithium-ion battery design for electric vehicles that eliminates the need for external cooling systems by maximizing heat transfer through the stacked battery cells themselves. The cells have discrete planar layers with larger surface area in the horizontal direction than vertical. This allows more heat transfer in the horizontal plane compared to vertical, promoting heat dissipation. The cells also use ceramic separators and solid electrolytes instead of flammable electrolytes. Additionally, external heat sinks can be added around the cells. The optimized cell design and internal heat transfer components allow adequate cooling without external coolant.

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Immersion cooling system for batteries that improves cooling efficiency and stability by passing cooling fluid through channels in pressure pads between battery cells. The channels extend from end to end of the pads, increasing heat exchange area compared to just top/bottom contact. This prevents hotspots and concentrations of pressure. The channels are optimized based on cell size, fluid properties, and expected heat. The pads are stacked between cells with a distribution plate to distribute pressure and prevent deformation during swelling.

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An immersion liquid-cooled battery pack that provides improved temperature control and consistency compared to conventional battery packs. The pack has a battery box filled with insulating coolant. The battery pack itself is immersed in the coolant to allow direct contact for heat exchange. This eliminates the need for external cooling pipes and allows each cell to have uniform cooling. The insulating coolant improves temperature consistency between cells compared to air or liquid cooling. It also saves space and costs compared to external cooling pipes.

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Battery pack and power device with improved internal temperature uniformity in immersion cooling. The battery pack has a unique flow path design to prevent temperature gradients in the immersion liquid. The pack has dividing holes in the upper cover plate to split the immersion liquid entering the top of the cell stack. This prevents a long flow path through the cells. The bottom plate has a water outlet to discharge the immersion liquid. This ensures consistent cooling throughout the pack. The pack also has channels and adhesives to guide and collect the liquid for efficient discharge.

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Immersed battery cooling device for high-power electric vehicle battery packs that provides improved cooling efficiency compared to air or plate cooling. The device uses a sealed enclosure with channels for circulating a cooling fluid around the battery cells. The channels are divided into top and bottom sections connected by openings in the guide plate between the cell rows. The bottom section has fixed brackets with slots for installing individual battery cells. The cells are bonded to the brackets with adhesive to secure them in place. This allows immersing the cells in the cooling fluid for more effective heat transfer.

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Immersed liquid-cooled battery system that provides higher cooling efficiency and simplifies battery manufacturing compared to conventional liquid cooling methods. The system involves enclosing multiple battery cells in a sealed box and immersing them directly in a cooling medium. This maximizes heat dissipation area as the entire cell periphery is in contact with the cooling liquid. It eliminates the need for separate liquid cooling plates, water pipes, and joints next to the cells. The cells are also more easily installed by eliminating gluing, curing, stacking, and hoisting steps.

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Immersion cooling system for battery packs in electric vehicles that uses metal-capped pouch cells to improve cooling and prevent thermal runaway propagation. The cells have metal housings with exhaust ports, vents, and openings. The cells are arranged in a battery enclosure with an exhaust manifold connected to the cell exhausts. This allows removing hot gases from the cells as they cool in the surrounding dielectric fluid. The metal housings, exhaust ports, and vents prevent internal cell failures from spreading. The exhaust manifold removes exhaust gases from the enclosure. This helps prevent thermal runaway propagation by removing hot gases from failed cells before they can heat adjacent cells. The enclosure can also be filled with dielectric fluid to further submerge the cells.

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Battery cooling system for electric vehicles that efficiently dissipates heat generated in the battery pack. The cooling system uses magnetic fluid filled channels below the battery pack to absorb and transfer heat from the pack. A heat sink absorbs heat from the fluid. A magnetic control unit improves heat transfer by magnetizing the fluid. This enhances cooling compared to traditional air cooling.

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Heat dissipation structure and battery pack design to improve heat dissipation efficiency of batteries, especially for high power applications like electric vehicles. The heat dissipation structure uses a heat exchange plate sandwiched between a liquid storage member and a heat conductive member. The batteries have liquid cooling channels connected to the storage member, and heat is transferred from the batteries to the storage member. The exchange plate then conducts the heat to the heat conductive member, which is in contact with the coolant. This allows direct heat transfer from the batteries to the coolant, increasing heat dissipation efficiency compared to prior designs where the heat exchange plate had limited contact area with the coolant. The improved heat dissipation enables higher power batteries without overheating issues.

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Immersed liquid-cooled battery system and temperature control system to reduce temperature differences between battery cells, improve safety, and extend battery life. The system uses a coolant that surrounds the battery packs in the battery cabinet. A mixing slurry is added to the coolant to enhance flow and temperature control. A pump, chiller, and expansion tank manage the coolant circulation. The chiller processes the coolant flow to maintain a constant temperature. The expansion tank prevents coolant expansion from damaging piping. The system also has temperature sensors to adjust the coolant flow rate based on battery temperatures.

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