Novel wireless power supply electricity taking device

Abstract

The utility model relates to a novel wireless power supply electricity taking device, which is used for a wireless receiving end to obtain electric energy and comprises an electricity taking assembly and a resonant capacitor assembly, the resonant capacitor assembly is arranged above the electricity taking assembly and comprises a resonant capacitor plate, and the electricity taking assembly comprises an H-shaped magnetic core and an electricity taking coil. The two ends of the electricity taking coil are connected to the resonant capacitor plate, and an output cable of the resonant capacitor plate is connected to a receiving controller. The electricity taking coil is of a multi-layer structure in the vertical direction, the size of the electricity taking device can be reduced under the same power requirement, the electricity taking efficiency of a unit area is improved, and cost is reduced. The resonant capacitor assembly is arranged above the electricity taking assembly, and the distance between the resonant capacitor plate and the electricity taking coil is reduced, so that the equipment integration level is improved, the deviation requirement on coil parameters is reduced, the parameters of the electricity taking device are more stable, the overall consistency performance is better, and production and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless power supply, in particular to a novel wireless power supply device. Background Art

[0002] Wireless power supply technology is a new technology that provides real-time power supply to stationary or moving electrical equipment through non-electrical contact. This technology is a wireless power transmission mode based on the principle of inductive coupling or nuclear magnetic resonance. It mainly uses electromagnetic field as the medium for power transmission. Based on the loose inductive coupling structure of the transformer, it uses power electronics technology to increase the frequency of the magnetic field and reduce the air gap loss to achieve wireless power transmission. This wireless power transmission technology is characterized by high transmission power, which can reach several kilowatts, and achieves efficient power transmission within a very close distance.

[0003] The coupling mechanism of the contactless power supply technology includes a transmitting coil, a receiving coil and a magnetic core. The magnetic conductivity of the magnetic core is used to generate a high-frequency alternating magnetic field in the receiving coil, thereby generating an induced current.

[0004] Existing receiving coils are usually wound horizontally, such as Figure 1 As shown, the outer coil is arranged outside the inner coil, and each layer of coil is arranged horizontally in sequence, and the horizontally wound coil is arranged above the magnetic core. The horizontally wound coil occupies a large area, making the receiving end device large and the energy conversion efficiency low. At the same time, the resonant capacitor plate is arranged separately from the receiving coil, which reduces the stability of the entire power supply. Utility Model Content

[0005] In view of this, it is necessary to provide a new type of wireless power supply with small size, high energy conversion efficiency and simple structure.

[0006] A new type of wireless power supply device is used to obtain electrical energy at a wireless receiving end, including a power collection component and a resonant capacitor component electrically connected to the power collection component, the resonant capacitor component is arranged above the power collection component; the resonant capacitor component includes a resonant capacitor plate, the power collection component includes an H-shaped magnetic core and a power collection coil wound around the H-shaped magnetic core, both ends of the power collection coil are connected to the resonant capacitor plate, and the output cable of the resonant capacitor plate is connected to a receiving controller.

[0007] Preferably, the H-shaped magnetic core includes a first magnetic part and a second magnetic part which are arranged in parallel up and down, a middle column is provided between the first magnetic part and the second magnetic part, the length of the middle column is the same as the length of the first magnetic part and the second magnetic part, and the cross-sections of the first magnetic part, the middle column and the second magnetic part are I-shaped.

[0008] Preferably, the power taking coil is wound on the central column, the power taking coil adopts a multi-layer structure in the vertical direction, each layer of vertical coil has a plurality of coils arranged in sequence in the vertical direction, and the power taking coil is wound with Litz wire.

[0009] Preferably, the power collection group further includes a shell and an upper aluminum partition and a lower aluminum partition respectively arranged above and below the shell, the H-shaped magnetic core and the power collection coil are arranged in the shell, and the cross-section of the shell is I-shaped.

[0010] Preferably, the upper aluminum partition is fixed on the upper surface of the shell, the upper aluminum partition is rectangular, and the installation position of the upper aluminum partition corresponds to the position of the first magnetic part; the lower aluminum partition is long strip-shaped, and the lower aluminum partition is fixed in the central area of ​​the lower surface of the shell, and the installation position of the lower aluminum partition corresponds to the position of the middle column.

[0011] Preferably, an insulating Mylar sheet is provided between the upper aluminum spacer and the resonant capacitor plate, and the insulating Mylar sheet is used for insulation between the upper aluminum spacer and the resonant capacitor plate.

[0012] Preferably, the resonant capacitor component further comprises a resonant capacitor cover plate, wherein the resonant capacitor cover plate is arranged above the resonant capacitor plate, and the resonant capacitor is encapsulated in the resonant capacitor cover plate.

[0013] In the above-mentioned new wireless power supply unit, the power supply coil adopts a multi-layer structure in the vertical direction, which can reduce the volume of the unit under the same power requirement, improve the power supply efficiency per unit area, and reduce costs. The resonant capacitor component is arranged above the power supply component. Since the distance between the resonant capacitor plate and the power supply coil is reduced, it not only improves the device integration, but also reduces the deviation requirements for the coil parameters, making the parameters of the unit more stable, the overall consistency performance better, and easy to produce and maintain. The product structure of the utility model is simple, easy to produce, low cost, and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an existing receiving coil.

[0015] Figure 2 It is a schematic structural diagram of a novel wireless power supply device according to an embodiment of the utility model.

[0016] Figure 3 It is a structural explosion diagram of a novel wireless power supply device according to an embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the structure of the power collection coil of the novel wireless power supply collector according to the embodiment of the utility model.

[0018] Figure 5 It is a schematic diagram of the working state of the new wireless power supply device of the embodiment of the utility model (double-sided power supply).

[0019] Figure 6 This is a schematic diagram of the working state of the new wireless power supply device of the embodiment of the utility model (single-side power supply). DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0021] See also Figure 2 and Figure 3 , showing a new type of wireless power supply device 100 provided by an embodiment of the utility model, which is used for obtaining electric energy at a wireless receiving end, including a power collection component 20 and a resonant capacitor component 10 electrically connected to the power collection component 20, wherein the resonant capacitor component 10 is arranged above the power collection component 20, and an insulating Mylar sheet 30 is arranged between the resonant capacitor component 10 and the power collection component 20; the resonant capacitor component 10 includes a resonant capacitor plate 11, and the power collection component 20 includes an H-type magnetic core 21 and a power collection coil 22 wound around the H-type magnetic core 21, both ends of the power collection coil 22 are connected to the resonant capacitor plate 11, and an output cable 40 of the resonant capacitor plate 11 is connected to a receiving controller.

[0022] Preferably, the H-shaped magnetic core 21 includes a first magnetic part 211 and a second magnetic part 213 which are arranged in parallel up and down, a middle column 212 is provided between the first magnetic part 211 and the second magnetic part 213, the length of the middle column 212 is the same as the length of the first magnetic part 211 and the second magnetic part 213, and the cross-sections of the first magnetic part 211, the middle column 212 and the second magnetic part 213 are I-shaped.

[0023] Specifically, the H-shaped magnetic core 21 can be used for single-side power supply or double-side power supply. Figure 5 A transmitting cable 200 is respectively arranged in the grooves on both sides of the power supply 100 to realize the double-sided power supply of the H-shaped magnetic core 21. Figure 6 A transmitting cable 200 is arranged in a groove on one side of the power supply 100 to complete the single-sided power supply of the H-shaped magnetic core 21.

[0024] Preferably, the power coil 22 is wound on the middle column 212, and the power coil 22 adopts a multi-layer structure in the vertical direction. Figure 4 Each layer of vertical coils has a plurality of coils arranged in sequence in the vertical direction, and the power taking coil 22 is wound with Litz wire.

[0025] Specifically, compared with a horizontal coil, the power taking coil 22 arranged in a vertical multi-layer structure has a smaller size and uses fewer magnetic cores under the same power requirement, which can greatly improve the power taking efficiency per unit area and reduce costs.

[0026] Specifically, Litz wire is a conductor made of multiple independently insulated conductors twisted or braided together. Litz wire has good anti-interference performance, so it is often used in the winding of high-frequency transformers.

[0027] Preferably, the power collection group further includes a shell 23 and an upper aluminum partition 24 and a lower aluminum partition 25 respectively arranged above and below the shell 23, the H-shaped magnetic core 21 and the power collection coil 22 are arranged in the shell 23, and the cross-section of the shell 23 is I-shaped.

[0028] Specifically, in this embodiment, the housing 23 includes two symmetrical parts, which are buckled together to form a whole, and the H-shaped magnetic core 21 and the power taking coil 22 are covered in the housing 23. In other embodiments, the housing 23 can be packaged by buckling the upper and lower covers to achieve the purpose of protecting the H-shaped magnetic core 21 and the power taking coil 22.

[0029] Specifically, the two left-right symmetrical parts constituting the housing 23 have the same structure, so that the parts of the left and right parts can be shared, which simplifies the installation operation and reduces the production cost.

[0030] Preferably, the upper aluminum baffle 24 is fixed on the upper surface of the shell 23, the upper aluminum baffle 24 is rectangular, and the installation position of the upper aluminum baffle 24 corresponds to the position of the first magnetic part 211; the lower aluminum baffle 25 is long and strip-shaped, the lower aluminum baffle 25 is fixed in the central area of ​​the lower surface of the shell 23, and the installation position of the lower aluminum baffle 25 corresponds to the position of the middle column 212.

[0031] Specifically, the upper aluminum partition 24 and the lower aluminum partition 25 are used to shield the interference of external signals on the H-shaped magnetic core 21 and the power taking coil 22. The rectangular upper aluminum partition 24 and the long strip lower aluminum partition 25 play the role of shielding external signals.

[0032] Preferably, the insulating Mylar sheet 30 is disposed between the upper aluminum spacer 24 and the resonant capacitor plate 11 , and the insulating Mylar sheet 30 is used for insulation between the upper aluminum spacer 24 and the resonant capacitor plate 11 .

[0033] Specifically, the Mylar sheet 30 has the advantages of being dimensionally stable, flat, and having excellent tearing strength, and has super strong insulation performance, as well as excellent electrical, mechanical, heat-resistant, and chemical-resistant properties.

[0034] Preferably, the resonant capacitor component 10 further includes a resonant capacitor cover plate 12 , wherein the resonant capacitor cover plate 12 is disposed above the resonant capacitor plate 11 , and the resonant capacitor is encapsulated in the resonant capacitor cover plate 12 .

[0035] Specifically, the input end of the resonant capacitor is electrically connected to the power taking coil 22 through the cable 40 , and the output end of the resonant capacitor is connected to the receiving end controller through the cable 40 .

[0036] In the above-mentioned new wireless power supply collector 100, the power collection coil 22 adopts a multi-layer structure in the vertical direction, which can reduce the volume of the collector 100 under the same power requirement, improve the power collection efficiency per unit area, and reduce costs. The resonant capacitor component 10 is arranged above the power collection component 20. Since the distance between the resonant capacitor plate 11 and the power collection coil 22 is reduced, it not only improves the device integration, but also reduces the deviation requirements for the coil parameters, making the parameters of the collector more stable, the overall consistency performance better, and easy to produce and maintain. The product structure of the utility model is simple, easy to produce, low cost, and easy to promote.

[0037] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, technical personnel in this field can also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A new type of wireless power supply device, used for obtaining electric energy at a wireless receiving end, characterized in that: It includes a power collection component and a resonant capacitor component electrically connected to the power collection component, wherein the resonant capacitor component is arranged above the power collection component; the resonant capacitor component includes a resonant capacitor plate, and the power collection component includes an H-shaped magnetic core and a power collection coil wound around the H-shaped magnetic core, both ends of the power collection coil are connected to the resonant capacitor plate, and the output cable of the resonant capacitor plate is connected to a receiving controller.

2. A novel wireless power supply device as claimed in claim 1, characterized in that: The H-shaped magnetic core includes a first magnetic part and a second magnetic part which are arranged in parallel up and down, a middle column is provided between the first magnetic part and the second magnetic part, the length of the middle column is the same as the length of the first magnetic part and the second magnetic part, and the cross-sections of the first magnetic part, the middle column and the second magnetic part are I-shaped.

3. A novel wireless power supply device as claimed in claim 2, characterized in that: The power taking coil is wound on the central column, and the power taking coil adopts a multi-layer structure in the vertical direction. Each layer of vertical coil has a plurality of coils arranged in sequence in the vertical direction, and the power taking coil is wound with Litz wire.

4. A novel wireless power supply device as claimed in claim 2, characterized in that: The power collection group also includes a shell and an upper aluminum partition and a lower aluminum partition respectively arranged above and below the shell. The H-shaped magnetic core and the power collection coil are arranged in the shell, and the cross section of the shell is I-shaped.

5. A novel wireless power supply device as claimed in claim 4, characterized in that: The upper aluminum baffle is fixed on the upper surface of the shell, the upper aluminum baffle is rectangular, and the installation position of the upper aluminum baffle corresponds to the position of the first magnetic part; the lower aluminum baffle is long strip-shaped, the lower aluminum baffle is fixed in the central area of ​​the lower surface of the shell, and the installation position of the lower aluminum baffle corresponds to the position of the middle column.

6. A novel wireless power supply device as claimed in claim 4, characterized in that: An insulating Mylar sheet is provided between the upper aluminum spacer and the resonant capacitor plate, and the insulating Mylar sheet is used for insulation between the upper aluminum spacer and the resonant capacitor plate.

7. A novel wireless power supply device as claimed in claim 1, characterized in that: The resonant capacitor component further includes a resonant capacitor cover plate, which is disposed above the resonant capacitor plate, and the resonant capacitor is packaged in the resonant capacitor cover plate.

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