Tire Energy Recovery

A smart wheel rim for vehicles with embedded tire pressure sensors, display, and power generation capabilities. The rim has a built-in tire pressure indicator, an electric power generator, and a wireless connection to the vehicle's tire pressure monitoring system. The generator charges an onboard battery to power the indicator. This allows real-time tire pressure display directly on the rim without needing a separate display in the cabin. It also enables dynamic wheel identification since the sensor and display are integrated into the rim. This eliminates the need for fixed sensors that cannot be swapped between wheels without updating the system. The rim can communicate with the vehicle's tire pressure monitoring system to send and receive tire pressure data wirelessly.

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A retrofit wheel motor that can be easily installed on existing vehicles to improve efficiency and reduce emissions. The motor is integrated into the wheel assembly and has an onboard energy storage module. The motor has a rotor with permanent magnets and a stator with windings. The stator and rotor are spaced by an air gap. The stator is connected to the outer wheel rim and rotates with it. The stator can also rotate relative to the rotor. This allows the motor to capture braking energy and provide acceleration boosts. The storage module is mounted on the stator and interacts with the magnets/windings to receive/transmit energy. This enables onboard energy recovery and storage without needing external components.

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An electric vehicle power generation system that converts the kinetic energy of a vehicle's deforming tires during driving into electrical energy. The system uses linear generators inside the tires that convert the energy from tire deformation due to impacts into electrical energy. This kinetic energy is stored in capacitors and then rectified to charge the vehicle's battery. The system allows recovering energy from tire deformation during driving instead of wasting it.

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Electric energy harvesting tire using studs that generate electricity as they deform in the tire tread. The studs are fixed in grooves and have piezoelectric elements at their bottom. As the studs move with the road, the piezoelectric elements convert the deformation into electrical energy. This harvested energy can be stored and used to power onboard electronics or tire pressure sensors.

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Smart tire with array energy harvesting to provide consistent power for internal sensors and devices without relying on the vehicle battery. The smart tire has piezoelectric modules attached to the inner surface of the tire that generate electricity as the tire deforms during rotation. The modules are connected in parallel arrays around the tire to maximize deformation and power output. The harvested AC voltage is rectified, stabilized, and stored in an energy element. This provides stable DC power for tire sensors and devices.

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Tire self-supply energy-collection charging device that eliminates the risk of car energy loss, power consumption burden and personnel's mileage anxiety, increases duration, and optimizes personnel experience of going on a journey. The device includes a PVDF piezoelectric film, a magnetostrictive material, a tire air-tight layer, a rim and a tire cover, and is arranged in the tire airtight layer, the strength relation among materials of the tire body reinforcing layer is not damaged, the driving operation of personnel is not influenced, and the potential safety hazard of personnel going out is reduced.

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Tire with integrated power generation capability that can generate electricity from road vibrations and pressure changes when the vehicle is driving. The tire has multiple separated power generation modules like piezoelectric, electromagnetic induction, or magnetostrictive devices. These modules convert the tire's dynamic motion into electrical energy without external power. The generated electricity can be used to charge the vehicle battery, power onboard sensors, or store energy in a capacitor.

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An electric vehicle (EV) charging system that uses piezoelectric elements embedded in the tires to generate electrical charge during vehicle motion. The piezoelectric elements compress as the tire rolls, creating a time-varying voltage. A capacitor connected to the elements stores the charge. A discharge circuit connects the capacitor to a coil embedded in the tire. This discharges the capacitor into the coil, creating a time-varying magnetic field. A receiver coil on the EV picks up the magnetic field to wirelessly charge the vehicle battery. The piezoelectric elements, capacitor, and coil are arranged around the tire. The system provides self-sustaining, contactless charging without requiring infrastructure or contact with the road.

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A piezoelectric energy harvesting device for capturing strain energy from tire deformation to power tire pressure monitoring systems. The device is installed in a wheel hub and consists of piezoelectric curved beams sandwiched between the spokes. An inner magnet is fixed to one side of a beam and an outer magnet covers the inner tube. The magnets are aligned in the radial direction with opposite poles facing each other. When the tire deforms, the magnets move relative to each other generating electrical charge on the piezoelectric beams.

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Wheel power generation device for vehicles that converts the pressure between the tire and the ground into electrical energy. The device has piezoelectric layers sandwiched between the wheel hub, elastic support, and outer tire. When the wheel compresses during driving, the piezoelectric layers generate electricity due to the applied pressure. This allows recovering wasted energy from the tire contact. The double-layer piezoelectric structure improves power generation efficiency compared to just one layer. The elastic support replaces the traditional tire for stable support and shock absorption.

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Electrical connector assemblies for harvesting energy from tire and wheel motion without needing batteries. The assemblies have conductors that extend through the tire from inside to outside. This allows harvesting kinetic energy as the tire rotates. The connectors can also be embedded in the tire. The wheel has matching connectors to connect to the tire connectors. This enables harvesting energy from the wheel rotation. The harvested energy can power onboard electronics like sensors. The connectors can also have liquid metal contacts for better electrical connection.

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Tire with integrated piezoelectric devices that generate electricity as the tire rolls. The tire has piezoelectric devices in the inner core with upper and lower piezoelectric ceramics sandwiched between metal sheets. Joints connect the ceramics to wires, with parallel metal plates connecting the upper ceramics and wires. The lower ceramics are wrapped in metal and the upper ceramics are covered by metal caps. Connections between the metal pieces form negative electrode structures. Multiple negative electrode structures are connected in parallel. The piezoelectric devices convert the tire's deformation into electrical charge as it moves.

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A piezoelectric tire that generates electricity from tire deformation and uses it to power onboard electronics. The tire has a coating of piezoelectric material on the inner surface that contacts the ground. This generates electric charge when the tire flexes under load. Circuitry on the tire can harvest this power for applications like tire pressure monitoring or wireless communication. The coating length and shape are optimized for strain sensitivity.

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Power supply device for a passive sensor in a tire of a vehicle that greatly improves the maintenance period and service life of the intelligent tire, and reduces the use cost. The device includes a tire cover, a piezoelectric energy harvesting layer, a thermoelectric energy harvesting layer and a main circuit control board.

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System and method for generating power and information feedback from tire deformation using piezoelectric films. The system involves embedding PVDF piezoelectric films in tires to generate power and collect road environment data. A first thicker PVDF film generates power from tire deformation. A second smaller film collects charge for road sensing. A conditioning circuit converts the charge to voltage, a microcontroller processes the data, and a control unit uses it to optimize vehicle dynamics. This integrates power generation and sensing in the tire, leveraging deformation energy and reducing maintenance costs.

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Automated vehicle tire that improves energy harvesting. The tire includes a profiled tread, belt plies, a carcass insert, an inner layer, side walls and at least one piezo component as a piezoelectric energy converter.

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Power generation device for use in tires that can generate electricity when the tire is in motion. The device has two insulated members with a cushioning material between them. The insulated members come into contact and charge oppositely based on the real contact area. This charge separation generates voltage as the tire deforms. The cushioning material maintains space for the real contact area to change as the tire moves, improving voltage. Adding a weight presses the members for consistent charge separation. The device can be used in tires to generate power during normal driving.

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A piezoelectric-electromagnetic composite energy capture structure for autonomous powering of devices like automotive electronics and tire pressure monitors. The structure captures energy from tire deformation during vehicle motion. It uses a piezoelectric beam between the wheel hub and tire that bends due to tire deformation. This bending generates electrical charge via the piezoelectric effect. Additionally, a coil with an iron core around the outer tire ring and magnets generate electricity via electromagnetic induction due to tire deformation.

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Automatic power supply method for smart devices in automobile tires that eliminates the need for batteries in tire sensors. It uses a piezoelectric energy harvester between the tire and carcass to convert tire vibrations into electrical power. The harvester has an upper support spring, elastic substrate, piezoelectric material, small stiffness springs, and a liquid chamber. The piezoelectric material is in the liquid chamber filled with a low-viscosity liquid. The harvester captures tire vibration energy and provides power to sensors like pressure and temperature gauges in the tire.

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Passive pressure-powered device for cars that harvests energy from tire rotation to provide an onboard power source. The device uses a piezoelectric rubber film sandwiched between a metal plate and the tire inner surface. As the tire rotates, pressure deforms the piezoelectric rubber to generate electricity. Wires connect to the metal plate and the piezoelectric film. A brush slip ring on the wheel hub connects the wires to an output device like a battery or electrical system. The slip ring allows the wires to rotate with the wheel. A ball bearing isolates the slip ring from the tire's rotation. A brush and brush holder contact the slip ring wires. A compression spring presses the brush against the slipping wires. This harvests rotational tire pressure to generate electricity that can power car electronics or lighting.

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