Liquid Cooling for Efficient EV Battery Thermal Management

Cooling mechanism for square prismatic batteries that improves cooling efficiency compared to conventional designs. The cooling mechanism has a liquid-filled cavity on the battery mounting plate, connected to inlet and outlet pipes. A flow regulating valve controls liquid flow. This allows direct cooling of the battery cells by contacting the bottom of the cells. The liquid quantity is adjustable to match cell temperatures. The total flow assembly connects multiple battery cooling systems to a centralized water circuit.

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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 cooling system for electrochemical batteries to prevent overheating and thermal runaway. The cooling system uses a specialized liquid cooling board inside the battery pack. It has channels with air-cooled components like L-shaped pipes with pivoting fans. The pipes connect to a booster pump, water tank, and heat exchanger. The pipes can tilt and rotate for optimal cooling. It prevents crystal growth in the channels by using air-cooled sections. The pipes pivot to move the fans for better cooling. A tilting frame allows adjusting the board angle. This multi-stage liquid cooling system with air-cooled sections and movable fans provides efficient cooling for high-power batteries.

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An energy storage device with improved cooling efficiency for high power density battery modules. The device has two vertically stacked liquid cooling plates that are thermally connected to the battery module's sides. The plates have parallel channels for circulating cooling fluid. The channel lengths on the first plate for some sections are shorter than others. This unequal channel length configuration allows better temperature uniformity by reducing temperature differences between sections. It improves cooling efficiency by reducing hot spots in high power density battery modules. The shorter channels on the first plate compensate for higher temperatures generated at the bottom of the module.

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Energy storage battery temperature control system to prevent thermal runaway and improve battery pack consistency in electric vehicles. The system uses an internal cooling loop with a liquid supply and return pipeline, a temperature regulating device, and a cooling unit. It injects cooling liquid into the battery pack if a cell goes out of control to prevent thermal runaway. It also has a fire-fighting device that can spray cooling liquid into the pack from above if needed. This allows rapid cooling and suppression of runaway cells. The internal loop reduces heat transfer links compared to air cooling and improves temperature uniformity.

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Circulating liquid cooled lithium battery pack with improved heat dissipation and uniformity compared to conventional battery packs. The pack has an internal cooling system where the battery housing is filled with a cooling liquid that circulates through a pump and piping. This allows more uniform cooling and higher heat dissipation compared to external liquid cooling methods. The pack consists of a battery cell assembly inside a housing filled with the circulating liquid. The liquid is pumped through pipes to circulate around the cells for cooling. This provides better cooling and temperature control compared to air or phase change materials.

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Active cooling system for battery packs in electric aircraft that uses a combination of active and passive cooling to efficiently manage battery temperatures without excessive weight and complexity. The active cooling involves a fluid-filled channel connected to the battery pack and controlled by a pump. The passive cooling uses extendible heat transfer elements connected to the pack and the channel. The active cooling provides initial cooling, and the passive elements augment it for individual modules without requiring fluid connections between them.

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Battery pack for electric vehicles that combines liquid cooling and air conditioning to efficiently cool the battery pack and passenger compartment. The battery pack has a liquid cooling loop connected to the vehicle's liquid cooling circuit. It also has a direct cooling loop connected to the vehicle's air conditioning evaporator. This allows parallel cooling of the battery pack using both liquid and air to improve cooling performance and reduce temperature variation.

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Battery pack cooling assembly, power battery pack, and vehicle with improved temperature consistency of the battery cells. The cooling assembly has two liquid cooling members with opposite flow directions. The first member has inlet and outlet on one side, and the second member's inlet connects to the first member's flow channel. This split flow path prevents temperature gradients as cooling fluid enters and exits from opposite sides. The fluid circulates between the members and battery cells to equalize temperature.

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Thermal management system for high-capacity lithium ion battery packs that improves temperature uniformity and reduces energy consumption compared to conventional cooling methods. The system uses a liquid cooling plate, bidirectional pump, flow controller, water tank, and flat heat pipes between battery cells. The liquid cooling plate has a symmetric flow channel for bidirectional circulation. The flat heat pipes between cells improve vertical heat conduction. The flow controller switches pump direction to balance cooling across the pack. This improves temperature uniformity compared to single-direction cooling.

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Battery pack liquid cooling device to efficiently dissipate heat from battery modules and prevent temperature differences. The cooling device encloses the battery modules in a housing with internal flow channels for circulating cooling liquid. The housing components like side plates and bottom plate have channels that contact the module surfaces to conduct heat. This provides full coverage cooling and uniform heat dissipation across the modules. A silica gel pad between the bottom plate and modules insulates and conducts heat, preventing abrasion. An insulating pad between the end plate and modules electrically separates them. A cover closes the housing.

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Battery module, battery system, and electric vehicle that improve safety and cooling of large cylindrical battery cells. The battery module uses a sealed box with a lower metal bracket, insulating sheet, and side plates to contain the cells. The cells are poured with sealant to prevent leakage. The modules are connected in a matrix with shared negative and positive aluminum rows for series connection. This allows using large cylindrical cells without directional exhaust channels. The sealed box and shared current path improve safety by containing thermal runaway and preventing spread. The matrix layout enables efficient cooling through shared liquid channels.

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A battery liquid cooling system for electrochemical energy storage stations that improves cooling efficiency, reduces space requirements, and allows flexible cooling power adjustment. The system uses a battery cooling plate, heat exchange plates, dense finned radiators, a liquid pump, and a controller. The cooling loop forms an external circuit around the battery pack, increasing contact area. A temperature sensor and controller allow dynamic pump speed adjustment based on pack heat. This provides rapid cooling without excess pumping for optimal battery life and lower energy consumption.

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Liquid cooling subassembly for improving safety and performance of battery packs in electric vehicles. The subassembly has a heat pipe sandwiched between multiple liquid cooling bodies. The heat pipe exchanges heat with the batteries above and below it. This internal liquid cooling allows quicker dissipation compared to just battery-to-cold plate contact. It reduces battery temperature swings and prevents hot spots. The subassembly can be used in battery packs to improve battery longevity and safety.

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Battery module and thermal management system for electric vehicle batteries that improves cooling efficiency and prevents overheating. The module has a tray with a first liquid cooling board on the bottom to cool the bottom of the cells. The cells are held in the tray and also contact a second liquid cooling board on the side of the cell chambers. This provides additional cooling surface area for the cell protrusions. The double-sided cooling improves heat transfer compared to just contacting the sides. It allows faster cooling of the cells during charging/discharging to prevent overheating and thermal runaway.

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Cooling structure and cooling device for power batteries in electric vehicles that provides efficient cooling without complicated piping connections. The cooling structure has a multi-ported tube that connects to multiple liquid cooling plates. The tube has a bellows section for flexibility and compensation of expansion differences. The cooling device has a cooler, circulator, and the flexible cooling structure. Coolant flows through the structure's multi-ported tube into the cooling plates, absorbs heat, then back to the cooler. This closed loop circulates cooling without complex piping connections between each plate.

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A soft pack lithium battery module thermal management system that combines air cooling and liquid cooling to improve heat dissipation compared to using either method alone. The system has a bellows enclosure with a liquid cooling plate group and soft battery pack group inside. The liquid cooling plates have internal channels connected to inlet and outlet headers. Coolant flows through the channels and exchanges heat with the batteries. Air flows through separate channels between the batteries and plates. This allows simultaneous cooling of both battery surfaces and the tabs using both air and liquid.

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Soft pack lithium battery module thermal management system that uses a combination of air cooling and liquid cooling to improve cooling efficiency. The system has a bellows, liquid cooling board group, soft pack battery group, and air flow channels. The battery and liquid cooling boards are mounted inside the bellows. Liquid cooling pipes connect the liquid cooling boards. Air flow channels connect the bellows bottom to the air. Coolant flows through the liquid cooling pipes and the air flows through the channels. This allows heat transfer between the battery, liquid cooling, and air cooling systems to enhance overall cooling performance.

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Battery thermal management system for electric vehicles that uses a combination of heat pipes and liquid cooling to improve cooling efficiency and reduce temperature differences between modules. The system has a flow control device with valves and a flow distributor that connects the heat pipe and liquid cooling plate inlets and outlets. It also has a temperature sensor, management system, and flow rate sensors. The management system monitors battery temperature and switches between using just the liquid cooler at low temps to using both the heat pipe and liquid cooler at higher temps. This balances module temps and reduces heat buildup.

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