Liquid-Cooling for EV Battery Temperature Control

A thermal management system for battery packs in electric vehicles that provides uniform cooling to prevent overheating and improve battery life. The system uses a circulation pump, a cooling device, and a network of cooling pipes within the battery pack. The pipes have a first row below the pack, a second row above, and heat exchange pipes between. Coolant enters the lower row, flows through the pack, then exits the upper row. This slow flow time fully cools the pack. The cooling device cools the returning coolant. The lower row below the pack ensures complete cooling.

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Thermal management system for electric vehicles that allows both battery cooling and heating using a single chiller component. The system has a battery circuit, drive circuit, and refrigerant circuit. The chiller can operate in cooling mode to extract heat from the battery during charging or discharging, and in heating mode to provide heat to the battery during cold weather starts. This eliminates the need for a separate battery heater component. The chiller can switch between cooling and heating using a combination valve to redirect the refrigerant flow path.

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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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A thermal management system for electric vehicles that allows efficient battery cooling and passenger cabin heating/cooling across a wide range of operating conditions. The system uses a common cooler to exchange working fluids between the battery thermal management circuit and the refrigerant circuit. This allows the battery cooler to be used more efficiently and fully utilize the heat exchange area. The system can switch between three modes: 1) simultaneous battery and cabin cooling, 2) battery heating using the battery cooler, and 3) cabin cooling using the battery cooler. Valves and expansion valves selectively route the fluids through the cooler and components like the battery pack and radiator to achieve the desired mode.

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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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Battery thermal management system for electric vehicles that improves temperature uniformity inside the battery pack. The system uses two cooling loops, one bypassing some components like heaters and radiators, to circulate coolant. A valve switches between loops. The bypass loop has lower pressure drop. Periodically switching flow direction in both loops further reduces temperature gradients.

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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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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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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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Battery thermal management system for electric vehicles that improves battery module output efficiency by using a closed-loop refrigerant cycle with heat recovery and regeneration. The system has a thermal management unit, cycle unit, heating unit, cooling unit, sensing unit, and control unit. The cycle unit circulates a first heat exchange medium to the battery module. The heating unit transfers refrigerant from the compressor to heat the battery. The cooling unit transfers refrigerant from the evaporator to cool the battery. The control unit selectively opens/closes the heating and cooling units based on battery temperature. This allows regenerating heat from the cooling unit to heat the battery instead of wasting it. The refrigerant cycle also allows separate cooling/heating paths to share pipes for simplicity.

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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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Reducing charging time of electric vehicles during high-power charging by utilizing external liquid cooling equipment. The vehicle's thermal management system has two cooling circuits connected by a heat exchanger. One circuit cools the battery and the other is connected to the vehicle's charging input. When charging with high power, the vehicle connects to external liquid cooling equipment. A valve switches the battery coolant flow to the external system, allowing it to cool the battery instead of the heat exchanger. This leverages the external cooling capacity to meet the increased cooling needs during high-power charging.

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A locally controllable active power battery temperature control system to balance temperature within battery packs in electric vehicles. It uses dual cooling systems, one on each side of the battery module, along with a bottom cooling system. Electronic expansion valves on the parallel coolant pipes allow flow rate adjustment. By increasing flow in hot areas and decreasing flow elsewhere, it dynamically balances temperature throughout the battery pack without affecting total flow. This prevents uneven temperature differences during charging/discharging that can degrade battery performance and life.

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Active battery pack cooling system for electric aircraft that uses a combination of active cooling with a coolant channel and passive heat transfer elements to effectively cool the battery pack without excessive complexity and weight from fluid connections. The active cooling system has a coolant channel with a pump to circulate fluid. The passive elements extend from the coolant channel to individual battery modules to transfer heat passively. This limits the amount of active cooling needed. The active cooling is controlled by a temperature sensor to optimize performance.

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Thermal management system for electric vehicles that allows rapid cooling of the battery during high heat conditions. The system has two separate refrigerant circuits, one for the passenger compartment and one for the battery. During rapid cooling, both circuits are connected to the battery heat exchanger. This allows coolant from both circuits to absorb battery heat simultaneously, rapidly dissipating it. The separate circuits prevent overloading one circuit with battery heat.

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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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Electric vehicle battery cooling system that enables efficient and adaptive cooling of batteries across a wide temperature range. It uses a hierarchical cooling strategy with three levels: air cooling for low load, indirect refrigerant cooling for medium load, and direct refrigerant cooling for high load/overheating. The system has multiple heat exchangers in the battery pack, one with a refrigerant circuit and another with a coolant circuit. The refrigerant directly contacts the battery for rapid cooling, while the coolant provides secondary cooling. This allows efficient cooling in all conditions without compromising performance or safety.

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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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