Power generation apparatus for vehicle tire

Abstract

A power generation apparatus for a vehicle tire, mainly comprising: a rim structure (10), which comprises an annular hollow rim (11) and a plurality of spokes (12), the outer peripheral surface of the rim (11) being used for fixing a tire (50), an inner rim space (111) being provided inside the rim (11), the spokes (12) being located on one side of the inner rim space (111), a central hole (112) being provided at a position corresponding to the axial center of the rim (11), each of the spokes (12) extending radially outward from the peripheral edge of the central hole (112) and being connected to one side of an inner wall surface (113) of the rim (11) so as to support the rim (11), and a first magnet set (13) being arranged on the inner wall surface (113); and a disk structure (20), which is provided in the inner rim space (111), a wheel shaft (21) being provided at the center of the disk structure (20) so as to penetrate through the central hole (112) and be fixed to a vehicle body structure (1) to remain stationary, an annular flange (22) corresponding to the inner wall surface (113) and maintaining a preset distance therefrom, a second magnet set (23) being provided on the annular flange (22), and a plurality of coils (24) being annularly arranged on the disk structure (20). Accordingly, when the vehicle tire (50) rotates with the rim structure (10), the first magnet set (13) moves relative to the coils (24) and the second magnet set (23) in the stationary disk structure (20). A magnetic field variation between the first magnet set (13) and the second magnet set (23) induces the generation of an induced current in the coils (24), and the induced current can be used by an external load or stored by means of an electrical energy storage apparatus (60), thereby converting rotational kinetic energy of the vehicle tire (50) into electrical energy.

Description

Power generation device for car tires Technical Field

[0001] This invention relates to the technical field of providing a power generation device for vehicle tires, and more particularly to a power generation device for vehicle tires that improves power generation and power utilization efficiency. Background Technology

[0002] Most current tire-based power generation technologies on the market rely on the kinetic energy generated during vehicle operation to recover energy and supplement the vehicle's electrical needs. However, existing technologies still have many shortcomings in terms of structural design, power generation efficiency, and reliability.

[0003] Traditional tire-mounted generators typically rely on a generator structure attached to the axle or wheel rim. These devices use the rotation of the wheel to drive the generator's rotor, creating relative motion between the stator and rotor to generate induced current. However, due to the large size of the generator, the additional structure significantly increases vehicle weight and affects fuel efficiency. Furthermore, the generator requires additional mechanical connections, leading to structural complexity, installation difficulties, and increased maintenance costs.

[0004] Other technologies employ embedded power generation solutions, such as embedding power generation modules inside the wheels to generate electricity using tire deformation or the piezoelectric effect. While these technologies offer improvements in weight and structure, their power generation efficiency is generally low, and the devices are susceptible to road conditions and vehicle speed, making it difficult to provide a stable and sufficient supply of power. Furthermore, the durability of embedded power generation modules in harsh environments remains a significant challenge.

[0005] Furthermore, existing vehicle tire power generation technology has not yet reached an ideal level in terms of waterproofing and sealing design. When vehicles are driven in wet environments such as rain and snow, water can easily enter the device, causing electrical components to fail or even short-circuit, which seriously affects the overall lifespan and reliability of the device.

[0006] Based on the aforementioned problems, previous technologies could not simultaneously maintain the high efficiency of energy conversion and lightweight structure of wheel-mounted power generation devices while also ensuring the stability, durability, and reliability of the devices. Therefore, designing a novel wheel-mounted power generation device that simplifies the structure, improves power generation efficiency, and enhances sealing and environmental adaptability is a pressing technical problem to be solved in this field. Summary of the Invention

[0007] Therefore, the present invention provides a power generation device for a vehicle tire, which mainly includes:

[0008] A wheel rim structure includes a hollow annular rim and a plurality of wheel ribs. The outer circumferential surface of the rim is used to fix a tire. The rim has an inner frame space inside. The wheel ribs are located on one side of the inner frame space and have a central hole corresponding to the axle position of the rim. Each wheel rib extends radially outward from the periphery of the central hole and connects to one side of an inner wall surface of the rim to support the rim. A first magnet group is arranged on the inner wall surface.

[0009] A disc structure is set in the inner frame space, and a wheel axle is provided at the center of the disc structure for passing through the central hole and being fixed to a vehicle body structure to remain stationary. A ring edge corresponds to the inner wall surface and maintains a preset distance. A second magnet group is set in the ring edge. The plurality of coils are arranged in a ring on the disc structure.

[0010] Accordingly, when the vehicle tire rotates with the wheel rim structure, the first magnet group moves relative to the coil in the stationary disc structure and the second magnet group. The change in the magnetic field of the first magnet group and the second magnet group induces an induced current in the coil. The induced current can be used by an external load or stored through an energy storage device, thereby converting the rotational kinetic energy of the vehicle tire into electrical energy.

[0011] The winding method of the coil includes: winding 8 coils once to form a first group of wires, winding 10 coils once to form a second group of wires, and pulling out the first group of wires and the second group of wires respectively and connecting them to the energy storage device.

[0012] In the second group of wires, the winding design of each group of 10 coils includes repeated winding of the 1st and 9th coils to increase the stability of the induced voltage and the output power.

[0013] The disc structure includes an annular wall, and a first annular sealing ring and a second annular sealing ring are respectively disposed on both sides of the disc structure and fixed to the annular wall and the annular edge to form a waterproof structure.

[0014] The induced current, after being rectified, can be used directly by an external load or stored as energy through an energy storage device.

[0015] The energy storage device has an input current range of 200 amperes to 2000 amperes, which is suitable for high-power energy storage needs.

[0016] It includes at least one capacitor with a capacity of 1 to 5 farads, and the capacitor is connected to the coil and the energy storage device respectively through wires.

[0017] The preset distance is 1 mm to 5 mm, which is used to improve the magnetic field coupling effect between the first magnet group and the second magnet group. Attached Figure Description

[0018] Figure 1 is an exploded view of a vehicle tire power generation device proposed in this invention;

[0019] Figure 2 is a schematic diagram of the wheel frame structure of a power generation device for a vehicle tire proposed in this invention;

[0020] Figure 3 is an application scenario diagram of a vehicle tire power generation device proposed in this invention;

[0021] Figure 4 is a schematic diagram of the coil arrangement of the disc structure in a power generation device for a vehicle tire proposed in this invention.

[0022] Figure 5 is a schematic diagram of the waterproof structure of the disc structure in a power generation device for a vehicle tire proposed in this invention.

[0023] Figure 6 shows a circuit application example of a vehicle tire power generation device that generates induced current according to the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description is provided in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the component or object preceding the word covers the component or object listed after the word and its equivalents, without excluding other components or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Please refer to Figures 1 and 2. Figure 1 is an exploded view of a vehicle tire power generation device 100 proposed in this invention; Figure 2 is a schematic diagram of the wheel rim structure 10 of the vehicle tire power generation device 100 proposed in this invention. This vehicle tire power generation device 100 includes a wheel rim structure 10 and a disc structure 20. The wheel rim structure 10 includes an annular hollow wheel rim 11 and a plurality of wheel ribs 12. The outer peripheral surface of the wheel rim 11 is used to fix a tire 50. The wheel rim 11 has an inner frame space 111 inside. The wheel ribs 12 are located on one side of the inner frame space 111 and have a central hole 112 corresponding to the axial position of the wheel rim 11. Each wheel rib 12 extends radially outward from the periphery of the central hole 112 and connects to one side of an inner wall surface 113 of the wheel rim 11 to support a first magnet assembly 13 arranged on the inner wall surface 113.

[0027] The wheel rim structure 10 adopts a hollow ring design, which not only fixes the vehicle tire 50, but also provides sufficient space in the inner frame space 111 to accommodate the disc structure 20 and related components. The radial design of the wheel ribs 12 evenly distributes stress, ensuring that the wheel rim structure 10 remains stable during vehicle operation.

[0028] The disc structure 20 is disposed in the inner frame space 111. A wheel axle 21 is located at the center of the disc structure 20 for passing through the central hole 112 and being fixed to a vehicle body structure 1 to remain stationary. An annular edge 22 corresponds to the inner wall surface 113 and maintains a preset distance d. A second magnet group 23 is disposed on the annular edge 22. The plurality of coils 24 are arranged in a ring on the disc structure 20.

[0029] Accordingly, when the tire 50 rotates with the wheel rim structure 10, the first magnet group 13 moves relative to the coil 24 in the stationary disk structure 20 and the second magnet group 23. The change in the magnetic field of the first magnet group 13 and the second magnet group 23 induces an induced current in the coil 24. The induced current can be used by an external load or stored through an energy storage device 60, thereby converting the rotational kinetic energy of the tire 50 into electrical energy.

[0030] Please refer to Figure 3, which illustrates an application scenario of the vehicle tire power generation device proposed in this invention. In the vehicle tire power generation device 100, the first magnet group 13 is arranged on the inner wall surface 113. Through its relative movement with the second magnet group 23, it generates a changing magnetic field, inducing a current within the stationary coil 24, thereby converting mechanical energy into electrical energy. This device achieves efficient power generation through a simplified structural design, avoiding the energy loss from additional mechanical mechanisms in traditional power generation devices, and is suitable for power generation needs in vehicle-moving environments.

[0031] Please refer to Figure 4, which is a schematic diagram of the coil arrangement of the disc structure in a power generation device for a vehicle tire proposed in this invention; wherein, the winding method of the coil 24 includes: winding 8 coils once to form a first group of wires S1, winding 10 coils once to form a second group of wires S2, and the first group of wires S1 and the second group of wires S2 are respectively pulled out and connected to the energy storage device 60.

[0032] The grouping and winding of the first group of wires S1 and the second group of wires S2 helps to balance the output of the induced voltage. The differentiated design of every 8 coils and every 10 coils optimizes the distribution of high-frequency and low-frequency currents to adapt to different power needs. The first group of wires S1 provides high-frequency output for real-time power supply, suitable for dynamic loads; the second group of wires S2 generates a more stable low-frequency current, suitable for charging or long-term stable power supply. Through the coordinated operation of multiple groups of coils, the flexibility and diversity of energy output are achieved, which is superior to power generation devices with a single output mode.

[0033] Furthermore, it should be noted that the winding design of every 10 coils in the second group of lines S2 includes the repeated winding of the 1st and 9th coils to increase the stability of the induced voltage and the output power. As shown in Figure 4, the first coil wound in the second group of lines S2' is marked C1, and the ninth coil is marked C9. The coil marked C9 is the first coil wound in the next second group of lines S2".

[0034] The first and ninth coils are repeatedly wound in the second set of wires S2 to enhance the induced magnetic flux of this coil segment, thereby increasing the output power. This also increases the stability of the induced voltage and reduces voltage fluctuations caused by uneven magnetic field changes. Compared to traditional uniformly wound coil designs, this design improves output efficiency and effectively solves the problem of high-frequency voltage fluctuations.

[0035] Please refer to Figure 5, which is a schematic diagram of the waterproof structure of the disc structure in the vehicle tire power generation device proposed in this invention. The disc structure 20 includes an annular wall 25, a first annular sealing ring 31 and a second annular sealing ring 32 respectively disposed on both sides of the disc structure 20, and fixed to the annular wall 25 and the annular edge 22 to form a waterproof structure. The first annular sealing ring 31 and the second annular sealing ring 32 are respectively disposed on both sides of the disc structure 20 and are tightly fitted with the annular wall 25 and the annular edge 22 to prevent moisture from penetrating into the area of ​​the coil 24. Through the double-layer sealing structure, the device is ensured to operate stably in humid or harsh environments, extending the life of the power generation device. Compared with a single-layer sealing design, this device provides higher waterproof performance and is particularly suitable for the variable environment during vehicle operation.

[0036] Furthermore, the induced current, after rectification, can be directly used by an external load or stored as energy through an energy storage device. Here, an external load refers to any device or system that receives and consumes electrical energy provided by a power source. Simply put, an external load is the power-consuming terminal of a power generation device, used to perform a specific function or operation.

[0037] For example, it can be used in LED lighting fixtures to provide illumination by using induced current.

[0038] Used in electric motors: to drive mechanical devices, such as the motors of electric vehicles or other rotating equipment.

[0039] For use in electronic devices such as mobile phones, tablets, or small household appliances.

[0040] Accordingly, a rectifier is provided at the output terminal of coil 24 to convert the induced current from alternating current to direct current, in order to meet the needs of different types of external loads or energy storage devices. In another embodiment, the vehicle structure 1 shown in FIG3 is an electric motorcycle, with the tire power generation device 100 proposed in this invention configured on the front wheel. Referring to FIG6, when the tire 50 in the tire power generation device 100 rotates with the wheel rim structure 10, the first magnet group 13 moves relative to the coil 24 and the second magnet group 23 in the stationary disc structure 20. The change in the magnetic field of the first magnet group 13 and the second magnet group 23 induces an induced current in the coil 24, which in turn generates the current. The induced current output terminal is connected to a bridge rectifier 101, and an inverter rectifier 102 and a unidirectional rectifier 103 are connected to its two ends respectively. The inverter rectifier 102 and the unidirectional rectifier 103 are then electrically connected to a transformer rectifier 104 and a supercapacitor 105. The supercapacitor is then connected to a main power control server 106 to provide power to other components in the vehicle body structure 1, such as an instrument panel 107, a headlight 108 and other electronic accessories. It can also be used to power a motor 109 to drive the wheels.

[0041] A rectifier (such as a rectifier bridge or diode) stabilizes the power output, eliminating irregular fluctuations in AC power caused by changes in the magnetic field, and ensuring stable operation of external loads. Compared to traditional generators that directly output AC power, this design provides more stable power, expands its application range, and enhances its applicability.

[0042] Furthermore, the energy storage device has an input current range of 200 amperes to 2000 amperes, adapting to high-power energy storage requirements. This high current input range, combined with the induced current output characteristics of the coil 24, ensures that the energy storage device can efficiently store instantaneously output electrical energy while avoiding damage caused by current overload.

[0043] Furthermore, the device includes at least one capacitor with a capacitance of 1 to 5 farads, which is connected to the coil 24 and the energy storage device via wires. Here, the capacitor's capacitance range of 1 to 5 farads is primarily used to absorb instantaneous fluctuations in the induced current and to work in conjunction with the energy storage device. Accordingly, the large-capacity capacitor rapidly charges and discharges in the high-frequency changing induced current to smooth the output voltage and prevent damage to the load due to instantaneous voltage fluctuations. Compared to designs relying solely on the energy storage device, this device, by introducing a capacitor, effectively improves the stability and safety of the output power, making it particularly suitable for high-frequency load scenarios requiring stable output.

[0044] Furthermore, please continue to refer to Figure 4, where the preset distance d is 1 mm to 5 mm. This is used to optimize the magnetic field coupling effect between the first magnet group 13 and the second magnet group 23, avoiding mechanical friction or loss caused by excessively small gaps, and helping to increase the amplitude of the induced voltage and reduce magnetic field loss. Traditional designs often do not consider the precise distance of magnetic field coupling, resulting in efficiency loss. This device maximizes magnetic field utilization and improves the overall performance of the power generation device through scientific distance design.

[0045] However, the above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and patent specification of the present invention shall still fall within the scope of the present invention.

Claims

1. A tire generator (100) for a vehicle, comprising: a wheel frame structure (10) having a hollow wheel frame (11) and a plurality of wheel ribs (12), the wheel frame (11) having an outer periphery for fixing a tire (50), the wheel frame (11) having an inner frame space (111) inside, the wheel ribs (12) being located on one side of the inner frame space (111), the wheel frame (11) having a central hole (112) corresponding to the position of the axis of the wheel frame (11), each of the wheel ribs (12) extending radially from the periphery of the central hole (112) and being connected to one side of an inner wall surface (113) of the wheel frame (11) to support the wheel frame (11), a first magnet group (13) being arranged on the inner wall surface (113); a disc structure (20) arranged in the inner frame space (111), the disc structure (20) having a wheel shaft (21) at the center for being arranged in the central hole (112) and being fixed to a vehicle body structure (1) to remain stationary, a ring edge (22) corresponding to the inner wall surface (113) and maintaining a predetermined distance (d), a second magnet group (23) being arranged on the ring edge (22), and a plurality of coils (24) being arranged in a ring shape on the disc structure (20); Accordingly, wherein, when the tire (50) rotates with the wheel frame structure (10), the first magnet group (13) moves relative to the coils (24) and the second magnet group (23) in the stationary disc structure (20), the change of the magnetic field of the first magnet group (13) and the second magnet group (23) induces an induced current in the coils (24), the induced current can be used by an external load or stored by an electric energy storage device (60), thereby converting the rotational kinetic energy of the tire (50) into electrical energy.

2. The tire electric power generation device as claimed in claim 1, wherein the winding manner of the coil (24) comprises: Each of the eight coils is wound once to form a first group of wires (S1), and each of the ten coils is wound once to form a second group of wires (S2), the first group of wires (S1) and the second group of wires (S2) are respectively pulled out and connected to the external load or the electric energy storage device (60).

3. The tire generator of claim 2, wherein the winding design of each of the ten coils in the second group of wires (S2) includes repeated winding of the first and ninth coils to increase the stability of the induced voltage and the output power.

4. The tire generator of claim 1, wherein the disc structure (20) comprises a ring wall (25), a first annular sealing ring (31) and a second annular sealing ring (32) are arranged on both sides of the disc structure (20) respectively, fixed to the ring wall (25) and the ring edge (22), forming a waterproof structure.

5. The tire generator of claim 1, wherein the induced current is rectified and can be directly used by an external load or stored by an electric energy storage device.

6. The tire generator of claim 5, wherein the input current range of the electric energy storage device is 200 amperes to 2000 amperes, which is suitable for high-power energy storage requirements.

7. The tire power generator of claim 5, wherein at least one capacitor with a capacitance of 1 Farad to 5 Farad is connected to the coil (24) and the power storage device (20) by wires, respectively.

8. The tire power generator of claim 1, wherein the default distance (d) is 1 millimeter to 5 millimeters for improving the magnetic field coupling effect between the first magnet set (13) and the second magnet set (23).

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