Airflow Management Techniques for EV Battery Cooling

Battery cooling system to reduce noise from electric vehicle (EV) battery packs. The system has a blower, duct, and valve to cool the battery pack. The valve closes the duct when battery temperature is normal and voltage is high, preventing backflow of high-frequency noise from the battery during voltage control. This suppresses noise without sacrificing cooling when needed.

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Battery pack design for electric vehicles that reduces airflow variation inside the battery module for more consistent cooling. The pack has a duct between the battery module and fan, with the intake port on the opposite side. This guides air over the module before it enters the fan, preventing localized airflow around the fan that can cause flow rate variation inside the module.

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Vehicle battery pack with improved cooling performance while reducing costs compared to conventional battery packs using external coolers and blowers. The battery pack has an internal airflow channel with constricted shape that gradually decreases in cross-section towards cooling fins. This restricts airflow and creates higher velocity and turbulence, enhancing heat transfer from the battery cells. The pack can also have an adjustable wind direction plate to restrict airflow and heat exchange in extreme temperatures. This passive internal cooling avoids the need for external cooling devices.

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Battery system design to prevent thermal events from spreading between battery packs. The system has a duct connecting the packs and a fan to circulate air. Filters at the pack connections prevent oxygen ingress. During thermal events, vented gases are directed through the duct and fan instead of spreading to adjacent packs. This isolates and confines the issue to the affected pack.

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Air cooling system for battery packs in electric and hybrid vehicles that improves cooling efficiency by integrating air intake, fans, exhaust, and electronics into the battery enclosure. The air intake, exhaust, and electronic compartments cover part of the battery exterior, enclosing the cooling components. This integrated air delivery module reduces heat transfer resistance and improves cooling performance compared to separate components.

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Air-cooled battery pack for electric vehicles that reduces fan noise, optimizes cooling channel space, lowers costs, and provides better cooling compared to traditional packs with external fans. The pack has multiple battery modules inside a case with an inlet and outlet. A cooling channel connects the bottom of the case to the inlet and outlet. Internal exhaust fans force air through the channel. This eliminates external fan noise and improves cooling efficiency by using forced convection.

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A battery pack with heat dissipation fan to prevent overheating and improve cooling of multi-cell battery packs. The pack consists of multiple battery bodies connected together, surrounded by a housing with a fan, ventilation, and heat dissipation features. The fan is connected to the batteries and draws air through the housing to cool them. The housing has ventilation holes and a radiating column to dissipate heat to the outside. The fan, ventilation, and column prevent internal temperature buildup. The housing is fixed to prevent movement during operation.

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A compact cooling system for battery packs in electric vehicles that provides improved cooling efficiency for both the battery case and the electric device compared to conventional systems. The system avoids the need for intermediate ducts and enlarged fans by arranging the battery case and electric device in parallel instead of series, with separate airflow paths. This reduces pressure drop and allows using a smaller fan. The cooling airflow also bypasses the battery case to directly cool the electric device. This prevents heated air from the battery entering the device and improves cooling overall.

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Battery cooling system for electric vehicles that uses an internal blower to circulate air through the battery pack. The system has a separate cooling unit inside the battery housing that provides a path for air blown by the blower to flow through the battery pack. This internal cooling system allows more effective and efficient cooling of the battery compared to just blowing air onto the outside of the pack. Sensors and controls can monitor and adjust the blower speed based on battery temperature.

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Battery pack cooling system using multiple fans to selectively direct airflow through sections of the pack. The system has a fan array with fans that can transmit airflow through different sections of the battery pack enclosure at different operating conditions. This allows targeted cooling or heating of specific sections based on need. The fans can also prevent backflow when one fan is transmitting through a section. This selective flow control improves cooling efficiency and reduces thermal imbalances compared to uniform flow systems.

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Battery pack design for improved cooling efficiency of the battery modules. The battery pack has a housing containing multiple battery modules in separate cases. The housing has walls with intake and exhaust ports facing each other. The battery cases have contact walls separating them. The contact walls face each other between the intake and exhaust walls inside the housing. This creates a ventilation path between the contact walls that forms part of the airflow between the intake and exhaust ports. It allows direct cooling of the contact walls, which improves overall module cooling efficiency.

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Battery pack design for electric vehicles that provides uniform cooling to all cells and prevents hot spots. The pack has upper and lower cell arrangements separated by a central chamber. A central horizontal airflow path connects the chambers and a vertical supply airflow brings in air. This allows airflow between the bottom surfaces of the cells in the central chamber to evenly cool them. An outlet above the cells vents hot air. The pack protects the bottom surface and ensures cell output.

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Cooling air arrangement for battery electric vehicles to improve cooling efficiency and reduce noise compared to conventional cooling systems. The arrangement has a cowl region with a directed air intake that can open/close. The intake ducts fluidly connect to the cooling device inlet and outlet. This allows targeted airflow control and eliminates excessive airflow through unused ducts. It also reduces noise compared to open cowl intakes. The closed intake when not needed prevents external air ingress into the vehicle cabin.

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An arrangement for cooling a battery in an electric vehicle that allows higher cooling efficiency compared to airflow generated by vehicle motion. The arrangement has a battery enclosed in a housing with an inlet and outlet. An airflow channel connects the inlet to the outlet, with a constriction in the channel. This creates a pressure drop when air flows through the constriction. This negative pressure at the outlet draws air from the inlet, cooling the battery inside the housing. The constriction-induced pressure drop provides additional cooling beyond just vehicle motion airflow.

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A cooling structure for a battery in a vehicle that uses vehicle interior air and air-conditioned air to cool the battery. The structure has an intake duct that takes in vehicle interior air and an intake port that introduces it into the battery. The intake duct is connected to an air conditioning duct that discharges air-conditioned air. The intake duct has a joint portion that connects the discharge port of the air conditioning duct. The joint portion is on the upstream side of the intake duct. The intake duct and the air conditioning duct are in the same battery housing. The discharge port is opposite the battery. The intake duct has a one-way valve to regulate air flow.

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Vehicle power supply system, like for electric vehicles, with improved cooling efficiency compared to existing systems. The system has a cooling fan that discharges air into the battery module compartment. The air is divided and routed to the modules. The division angle is greater for modules farther from the fan. This reduces pressure loss and improves airflow distribution compared to sharp 90 degree splits.

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Battery cooling system for electric vehicles that minimizes temperature differences between battery packs. The system uses dedicated ducts connected to each pack, with varying outlet resistances, to balance cooling airflow across packs. This prevents hotspots and improves overall pack cooling. The ducts connect the packs to an internal blower in the vehicle's roof or floor.

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Battery cooling system for electric vehicles that uses a single housing to house both high voltage and low voltage batteries. The housing has a cooling channel that circulates air to cool both batteries. The low voltage battery is mounted between the high voltage batteries and the inlet duct. This allows the low voltage battery to be cooled indirectly by the same air flow as the high voltage batteries.

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Cooling system for high voltage batteries in electric vehicles that uses cabin air for cooling while minimizing impact on cabin climate control. The system has a battery inlet housing with two inlets, one from the cabin and one from exterior. A flow guide vane redirects cabin airflow to mix with exterior airflow before entering the battery pack. This ensures consistent cooling across all battery cells. The mixed airflow reduces temperature variations and hotspots. The guide vane also smooths airflow to reduce noise and vibration.

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Method to balance cooling of battery pack sections in electric vehicles by selectively using fans to redirect airflow. In normal operation, fans move air through designated sections. If a section overheats, the fan for that section is switched off and the adjacent fan is used instead to provide cooling. This allows redistribution of airflow to compensate for blocked sections or uneven cooling requirements.

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