EV Battery Temperature Control

Battery module for electric vehicles that has a secondary cooling system to quickly and effectively cool individual cells with thermal runaway to prevent catastrophic failures. The module has two coolant circuits, one inside the module and another connected to an external refrigeration unit. The internal circuit has a heat exchanger that cools the cells. If a cell overheats, the internal heat exchanger is activated. If it still overheats, the external circuit is activated to bring the cell temperature down faster. This prevents thermal runaway propagation and cell damage.

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Thermal management system for mobile vehicles like electric cars that eliminates the need for a separate battery heater. It uses the existing drive motor to heat the coolant circuit instead. When battery heating is needed, the motor is run with a current that causes it to generate heat. This heat is then transferred to the battery coolant through a heat exchanger. This allows battery temperature control without adding a separate heater.

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Modular thermal management system for electric machines like mining trucks that provides variable levels of cooling for batteries based on temperature and load conditions. The system uses independently operable cooling modules to selectively activate and balance cooling capacity based on battery temperature. This allows efficient and flexible cooling without overcooling or undercooling the battery. The cooling modules can be turned on/off and cycled to optimize cooling performance for different load profiles. The system also monitors battery temperature and identifies the optimal module configuration for active cooling.

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Battery pack module with improved cooling efficiency for electric vehicles. The cooling system has parallel coolant circulation bypasses for each battery pack, controlled by valves, along with temperature sensors. The valves are opened/closed based on pack temperature to selectively route coolant through the bypass or main line. This allows targeted cooling of individual packs based on actual temperature needs, instead of overall cooling.

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Battery pack cooling system with intelligent thermal management for electric vehicle batteries. The system uses a thermoelectric generator and semiconductor refrigeration modules to quickly dissipate heat during high-rate discharge and prevent heat accumulation. The modules are dynamically controlled by an electronic module. The thermoelectric generator absorbs heat from the battery and converts it to electrical energy. The refrigeration module rapidly cools the battery using electric refrigeration. This dual heat absorption/dissipation structure stabilizes battery temperatures during high-rate discharge.

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Thermal management system for vehicles that improves efficiency and functionality of the system for cooling batteries and cabin air conditioning. It uses multiple heat exchange circuits and a controller to optimize heat transfer based on battery temperature. The battery has separate circuits with heat exchangers, and the controller selects which circuit(s) to use. This allows customized heat exchange for different battery areas. The controller can also control a storage device to supplement circuits as needed. This adaptive multi-circuit design improves battery cooling efficiency and reduces energy consumption compared to a single circuit.

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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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Battery thermal management system that integrates phase change materials, thermoelectric cooling, and liquid cooling to efficiently dissipate and preheat the battery pack in both hot and cold environments. The system has a core control module, temperature sensors, power supply module, thermoelectric module, and liquid cooling module. It switches between three working modes: refrigeration, shutdown, and heating based on battery temperature. In hot environments, the thermoelectric module cools the pack. In normal temps, the module stops. In cold, the module switches current direction to preheat. The power supply adjusts flow rate based on module heat capacity. This adaptive mode switching meets cooling/heating requirements in varying temps.

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Battery pack design with improved thermal management for electric vehicles that enables better cell temperature control and consistency. The battery pack has a liquid-cooled box containing phase change material. The battery cells are installed in the cooled box. If a cell gets too hot, it transfers heat to the coolant in the box. The phase change material absorbs heat and can transfer it back to the cells when they cool down. This helps maintain cell temperatures, especially in cold environments. The coolant circulates through a heat exchanger to dissipate heat outside the pack.

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Efficient thermal management for electric motorcycle battery packs that enables high-rate charging and discharging without overheating the batteries. The thermal management system uses a liquid cooling loop with a heat pipe assembly between the battery pack case and semiconductor module. The battery modules have water-cooling plates. A three-way valve switches between internal and external liquid circulation. This allows efficient heat transfer between the batteries, case, and semiconductor module using the liquid loop. The case has integrated heat pipes for direct cooling. The overall system prevents overheating during high-rate charging and discharging to extend battery life.

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Thermal management system for electric vehicles that improves battery performance in cold temperatures without consuming battery power. The system uses waste heat from the engine range extender to heat the battery pack. It connects the range extender's coolant outlet, battery pack inlet, and battery pack outlet in series with a mechanical pump. This allows the range extender's waste heat to transfer to the battery pack instead of using battery power to heat itself. It also has pressure sensors on the pumps to detect abnormal conditions and avoid overheating or burnout.

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Liquid cooling radiator structure for electric vehicle batteries that provides optimal heat dissipation using a combination of liquid cooling, air cooling, and phase change cooling. The radiator has an internal liquid cooling system with channels between the battery packs. It also has an external air cooling system with fins and channels to dissipate heat to the environment. Phase change cooling blocks are attached to the battery packs to rapidly conduct heat to the liquid coolant. This reduces the weight and complexity compared to full liquid cooling. The combined cooling modes provide high heat dissipation efficiency while minimizing temperature differences between battery 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 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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Hexagonal composite battery thermal management system that combines passive phase change cooling with active liquid cooling and thermoelectric heating to improve battery cooling and preheating. The system uses different phase change materials in the battery packs based on density to prevent thermal runaway propagation. It also integrates thermoelectric elements between the battery packs and liquid cooling plates to actively heat the packs when needed. This allows efficient cooling and heating of the battery packs using a composite approach.

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Vehicle thermal management system that efficiently heats and cools the battery pack using multiple heat exchangers connected in series between the battery, engine, and air conditioning systems. This allows the battery temperature to be regulated over a wider range. The strategy involves heat exchange through the engine in winter to warm the battery and through the air conditioning in summer to cool it. A controller optimizes the system based on real-time conditions to find the best balance between battery temperature and energy consumption.

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Integrated thermal management system for electric work machines like excavators that combines battery cooling with vehicle cooling in a compact and efficient manner. The system uses a battery coolant loop, a refrigerant loop, and a radiator with a fan. The battery coolant loop circulates coolant through the battery and radiator to passively cool the battery by convection. The fan forces air over the radiator for semi-passive cooling. The refrigerant loop actively cools the battery when needed by circulating refrigerant through the radiator. This integrated system allows versatile battery cooling in stationary work machines without relying solely on ambient air.

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Thermal management system for electric vehicle battery packs that uses both air and liquid cooling to improve temperature consistency and prevent damage. The system has a battery box with a phase change material, a cooling module with air ducts and a fan, and a speed regulating fan. The phase change material absorbs heat during charging and releases it during discharging. Air is circulated by the fan through the cooling module and ducts to dissipate heat. The system also uses a thermocouple to monitor temperature. The combination of air and liquid cooling provides better temperature control and consistency compared to just air or liquid cooling alone.

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Battery pack thermal management system that enables precise temperature control of individual cells in a battery pack. The system uses separate detection devices for each cell to monitor internal parameters like temperature, voltage, current. A control device connects to the cell detection and the heat exchanger. It uses the cell data to selectively cool or heat cells through the exchanger. This allows regulating cell temperatures independently instead of whole pack regulation.

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Battery thermal management system for electric vehicles that improves cooling and heating efficiency, uniformity, and energy consumption compared to conventional systems. The system uses a liquid cooling plate assembly inside the battery pack instead of just a bottom plate. The cooling plate has multiple sides that surround the battery cells. Refrigerant circulates through the plate to dissipate heat during charging or discharging, and water circulates through the plate to heat the batteries during cold conditions. The plate provides better coverage and capacity compared to just bottom cooling. The system also has a control method that optimizes the coolant flow rates and temperatures based on charging/discharging and ambient conditions.

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