Multi-receiving plate compatible single-ended contact type electric field coupling electric energy transmission device and design method

Abstract

The application provides a single-end contact type electric field coupling electric energy transmission device compatible with multiple receiving plates and a design method, relates to the technical field of electric field coupling electric energy transmission, and comprises multiple common plate array units arranged in an xy plane, periodically distributed and identical in shape, so that the center distance of each common plate array unit and all adjacent common plate array units is equal, and an inter-unit connecting line is arranged between the common plate array units; the projection of a receiving plate on the xy plane has the following characteristics: the direction of each side is parallel to one of the periodic distribution directions of the common plate array units; each side has another side corresponding thereto, which is parallel to the side and equal in length; the length of each side is an integer multiple of the length of the common plate array unit distribution period in the direction of the side, and the upper limit of the length is the length of the array boundary; and the outer boundary of the projection is a limited number of sides. The application realizes a transmitting array compatible with multiple receiving plates, maintains the complete facing area between the plates unchanged, and has strong anti-horizontal offset capability.

Description

Technical Field

[0001] This application relates to the field of electric field coupling power transmission technology, and more specifically, to a single-end contact electric field coupling power transmission device and design method compatible with multiple receiving plates. Background Technology

[0002] Capacitive Power Transfer (CPT) technology has gained widespread attention in recent years for its wireless charging applications in robotics, drones, and underwater equipment due to its advantages such as using metal plates as the coupling mechanism, low electromagnetic interference, strong ability to penetrate metal for energy transfer, and lightweight structural design. In practical engineering applications, various types and shapes of electrical equipment often require power replenishment within the same working area. For example, a drone hangar may house multiple drone models with different bottom profiles and dimensions; in sensor networks, sensor nodes with different functions often have differentiated shell structures. This necessitates that the power transfer system possess compatibility with diverse receiving terminals, meaning that the same transmitting device can adapt to receiving devices of various shapes and sizes, maintaining stable coupling parameters within permissible offset ranges.

[0003] However, existing research on CPT coupling mechanisms mainly focuses on the matching and optimization design of a single transmitting electrode and a single receiving electrode. The shape, area, and position of the receiving electrode are completely customized for a specific electrode, making it incompatible with receiving devices of other specifications. When charging equipment with different receiving electrodes is required, the entire coupling mechanism must be redesigned, lacking versatility and scalability. Currently, research on how to achieve a CPT coupling system that is compatible with multiple shapes of receiving electrodes on a single transmitting side is still lacking. In practical applications, this will lead to redundant construction of charging facilities, increased space occupation, and increased system costs, making it difficult to meet the automated charging needs of multi-equipment collaborative operation scenarios. Therefore, designing an electric field coupling power transmission device that can adapt a single transmitting device to multiple receiving electrodes and maintain stable coupling parameters within a set misalignment range has significant engineering application value. Summary of the Invention

[0004] To address the aforementioned problems, this application adopts a design method for a single-end contact electric field coupling power transmission device compatible with multiple receiving plates. The single-end contact electric field coupling power transmission device includes a transmitting side and a receiving side. The transmitting side of the coupling device sequentially includes a transmitting plate, a first dielectric layer, and a common plate. The receiving side of the coupling device sequentially includes a receiving plate, a second dielectric layer, and a short-circuit connector. The transmitting plate and the common plate serve as the primary and secondary terminals of the high-voltage side, respectively. The receiving plate and the short-circuit connector are short-circuited together to form the low-voltage side. The method includes the following steps: The common plate is designed to include multiple common plate array units arranged in the xy plane, periodically distributed and of the same shape, such that the center distance between each common plate array unit and all its adjacent common plate array units is equal, and inter-unit connection lines are set between the common plate array units. The common plate array units have at least two periodic distribution directions. Design the receiving plate such that its projection on the xy plane satisfies the following conditions: the direction of each edge is parallel to one of the periodic distribution directions of the common plate array elements; each edge has a corresponding edge that is parallel to it and of equal length; the length of each edge is a positive integer multiple of the distribution period length of the common plate array elements in that direction, and the upper limit of the length is the length of the array boundary; the outer boundary of the receiving plate's projection on the xy plane consists of a finite number of edges.

[0005] Optionally, hollow units that correspond one-to-one with the common plate array units in the vertical direction are designed on the emitter plate, and the centroid of each hollow unit is on the same vertical line as the centroid of the corresponding common plate array unit.

[0006] Optionally, the emitter plate and the first dielectric layer are designed such that their projected outer contours in the xy plane are identical, and that their projected outer contours encompass the graphic boundary of the outermost unit of the common plate.

[0007] Optionally, the hollow unit is designed so that its shape in the xy plane projection is the same as the shape of the common plate array unit in the xy plane projection, and the hollow unit in the xy plane projection completely overlaps with the common plate array unit in the xy plane projection, or it is a proportional enlargement of the common plate array unit projection with the centroid of the two as a reference point.

[0008] Optionally, the short-circuit connector is designed as a hollow annular short-circuit ring arranged along the outer contour of the receiving electrode, and the area of ​​the short-circuit ring projected in the xy plane is less than or equal to 10% of the area of ​​the receiving electrode projected in the xy plane.

[0009] Optionally, the short-circuit connector is designed as a short-circuit board, and the xy-plane projection of the short-circuit board does not coincide with the xy-plane projection of the receiving electrode.

[0010] Optionally, the arrangement design of the common plate array unit and the hollow unit is based on the following steps: First, determine the position of the hollow unit located at the center of the emitter plate. With the centroid of the hollow unit as the midpoint of the central regular hexagonal frame, place regular hexagonal frames of the same shape and size close to the boundary of the frame. Set the hollow units at the vertices and midpoints of the regular hexagonal frames, and the relative position relationship between the centroid of each hollow unit and the corresponding vertex or midpoint is consistent. Determine the number and position of the hollow units according to the size and shape of the required array, and then determine the outer boundary of the common plate and the emitter plate.

[0011] Optionally, the design of the inter-unit connection lines includes: designing the inter-unit connection lines such that the total projected area of ​​the inter-unit connection lines in the xy plane is less than or equal to 20% of the total projected area of ​​the common plate array units in the xy plane; The connection method for the inter-unit connection lines is as follows: All common plate array units are connected into a whole by inter-unit connection lines, and the minimum number of inter-unit connection lines is used while meeting the overcurrent requirements of the inter-unit connection lines.

[0012] Optionally, a second dielectric layer is designed such that its projection shape in the xy plane is the same as the projection shape of the receiving electrode in the xy plane, and the projection area of ​​the second dielectric layer in the xy plane is greater than or equal to the projection area of ​​the receiving electrode in the xy plane.

[0013] This application also provides a single-end contact electric field coupling power transmission device compatible with multiple receiving plates, which is designed using any of the aforementioned design methods for single-end contact electric field coupling power transmission devices compatible with multiple receiving plates.

[0014] The advantages of the multi-receiver plate compatible single-end contact electric field coupling power transmission device and design method provided in this application are as follows: (1) This application provides a single-end contact electric field coupling power transmission device that is compatible with different receiving plates. In scenarios where convenient power replenishment is required, it has the ability to supply power to multiple types of electrical equipment in one working area, thereby avoiding the problems of excessive cost and large footprint of installing power replenishment devices for each device separately.

[0015] (2) The design method provided in this application takes into account the requirements for anti-horizontal offset capability in actual scenarios. The common electrode array unit on the transmitting side of the device and the corresponding hollow area of ​​the transmitting electrode plate are arranged in a periodic pattern along several directions. Therefore, this application provides the conditions for designing the receiving electrode plate to be compatible with the array: the direction of each edge of the electrode plate is parallel to a certain periodic vector direction of the transmitting side array, and each edge has another edge parallel to it and of the same length, the length of which is an integer multiple of the periodic length in that direction. The receiving electrode plate that meets the above conditions can achieve the same area opposite to the common electrode plate within the boundary range of the common electrode array unit, thereby satisfying the device's anti-horizontal offset capability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This diagram illustrates the relationship between a common single-end contact structure and an electric field-coupled power transmission system. Figure 2 The common-plate array unit provided in this application has a regular hexagonal arrangement and a periodic vector pattern. Figure 3 This is a diagram showing the arrangement of the hollowed-out units of the coupling device provided in the embodiments of this application; Figure 4 A top view of a coupling device using a rectangular receiving plate provided in an embodiment of this application; Figure 5 This is a top view of a coupling device using a hexagonal receiving electrode provided in an embodiment of this application; Figure 6 A top view of a coupling device using a specially shaped receiving electrode that satisfies the edge conditions of a periodic electrode, as provided in an embodiment of this application. Figure 7 This is a schematic diagram showing the spatial arrangement of the coupling device provided in the embodiments of this application; Figure 8 This is a schematic diagram of a square common-plate array unit with a regular hexagonal array provided in an embodiment of this application; Figure 9 This is a schematic diagram of a regular hexagonal common-plate array unit with a regular quadrilateral array provided in an embodiment of this application; Figure 10 This is a schematic diagram showing the comparison of array densities between cells provided in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures: 1-Emitting side of the coupling device; 11-Emitting electrode; 12-First dielectric layer; 13-Common electrode; 14-Common plate array unit; 141-Regular hexagonal common plate array unit; 142-Square common plate array unit; 15-Auxiliary unit layout frame; 151-Regular hexagonal auxiliary unit layout frame; 152-Square auxiliary unit layout frame; 16- Hollowed-out unit; 17- Connecting line between units; 18- Schematic diagram of periodic vector direction; 2-Coupled device receiving side; 21-Receiver plate: 211-Rectangular receiver plate; 212-Hexagonal receiver plate; 213-Special shaped receiver plate; 214-Rhomboid receiver plate; 215-Parallelogram receiver plate; 22 - Second dielectric layer; 23-Short-circuit ring: 231-Rectangular short-circuit ring; 232-Hexagonal short-circuit ring; 233-Special shaped short-circuit ring; 234-Rhombus short-circuit ring; 235-Parallelogram short-circuit ring. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] The multi-receiver plate compatible single-end contact electric field coupling power transmission device and design method provided in this application are applicable to, for example... Figure 1 The single-ended contact array electric field coupling power transmission system shown includes an array coupling device, a DC power supply, a full-bridge inverter circuit, a primary-side compensation network, a secondary-side compensation network, a full-bridge rectifier circuit, and electrical equipment.

[0021] In a single-ended contact array coupling device, the low-voltage plates on the transmitting and receiving sides are short-circuited (i.e., a short-circuit connection between the common plate and the short-circuit ring). The relative positions of the high-voltage and low-voltage plates on the receiving side are fixed within the coupling device. Therefore, in array design, only the impact of changes in the relative position of the receiving plate (i.e., the high-voltage plate on the receiving side) on the transmitting array plane on the device's electrical performance needs to be considered. For power transmission, this translates to the effect of horizontal offset on the inter-plate coupling capacitance. The design scheme provided in this application specifies the shape, size, and relative position of all the above structures. Using this scheme, a complete array power transmission device that can be immediately used without considering engineering applications can be designed, and this design scheme meets the array's required resistance to horizontal offset.

[0022] like Figures 2-6 As shown, this application provides a design method for a single-end contact electric field coupling power transmission device compatible with multiple receiving plates. The single-end contact electric field coupling power transmission device includes a transmitting side and a receiving side of the coupling device. The transmitting side of the coupling device includes, in sequence, a transmitting plate, a first dielectric layer, and a common plate. The receiving side includes, in sequence, a receiving plate, a second dielectric layer, and a short-circuit connector. The transmitting plate and the common plate serve as the primary and secondary terminals of the high-voltage side, respectively. The receiving plate and the short-circuit connector are short-circuited together to form the low-voltage side. The method includes the following steps: The common plate is designed to include multiple common plate array units arranged in the xy plane, periodically distributed and of the same shape, such that the center distance between each common plate array unit and all its adjacent common plate array units is equal, and inter-unit connection lines are set between the common plate array units. The common plate array units have at least two periodic distribution directions. In this application, the xy plane is used as the design reference plane. However, in actual applications, the device may have multiple usage and installation orientations. This application does not limit the specific usage and installation orientation of the device.

[0023] The common electrode on the transmitting side consists of several common electrode array units arranged horizontally. When the transmitting device is placed in a three-dimensional coordinate system and viewed from above, the common electrode array units appear as several small polygonal units, and their projections on the xy-plane are arranged according to a periodic pattern. The design principle is that after confirming the position of the central unit on the platform, the remaining units are arranged around this central unit. Each unit must be equidistant from its adjacent units (including the central unit) to ensure that the array can be periodically arranged along any center line connecting adjacent common electrode array units, thereby increasing the number of available periodic vectors and increasing the design margin of the subsequent receiving electrode. The number of units is determined by the transmitting electrode. The boundary of the shape formed by connecting the outermost vertices of the outermost units should be within the outer boundary of the required array, and also within the outer boundary between the transmitting electrode and the first dielectric layer to ensure electromagnetic safety. Inter-unit connection lines are set between units to ensure that all units maintain the same potential and receive the same excitation. The connection lines are set such that their projected area on the xy plane is as small as possible compared with the unit area, so as to ensure that the change of the equivalent capacitance of the coupling device is minimal when it is horizontally offset, thus satisfying the anti-offset characteristics.

[0024] Further expansion of the array area will result in a greater number of cells within the array, a greater number of periodic cells arranged on the same straight line with equal distances between adjacent cells, and potentially more periodic vector directions.

[0025] Based on the above transmitter-side electrode design, further receiver electrode design is carried out to meet the anti-horizontal offset requirements. In anti-horizontal offset, the receiver electrode needs to maintain the characteristic that the coupling capacitance between the electrodes remains unchanged when it moves freely in parallel on the horizontal plane. Free parallel movement on the horizontal plane represents the addition of vectors after free movement in two vector directions in the xy-plane of the coordinate system. Therefore, the transmitter-side design should have at least two periodic vector directions to achieve the device's anti-horizontal offset capability.

[0026] Design the receiving plate such that its projection on the xy plane satisfies the following conditions: the direction of each edge is parallel to one of the periodic distribution directions of the common plate array elements; each edge has a corresponding edge that is parallel to it and of equal length; the length of each edge is a positive integer multiple of the distribution period length of the common plate array elements in that direction, and the upper limit of the length is the length of the array boundary; the outer boundary of the receiving plate's projection on the xy plane consists of a finite number of edges.

[0027] Prove the proposed boundary conditions: Let It is a two-dimensional lattice periodicity The measurable set, in which and Let the minimum periodic vectors be any two non-collinear vectors in the array: ; Its indicator function satisfies , representing the inclusion relationship between a point within the polygon of the receiving electrode and the common electrode array element. The value is 1 if the point is inside the element and 0 if it is outside the element.

[0028] ; set up If the region is a bounded polygon (i.e., the receiving plate region), then the above compatibility conditions can be mathematically represented as follows: Composed of a finite number of line segments; a complete periodic translation vector ;for For every edge E, there exists another edge. Make: ① ; ② ; ③ The outward normal direction is opposite; ④ .

[0029] Define the intersection area A(t) of the polygonal region with the measurable lattice set S as the region is translated from 0 to T along the periodic direction. Then, A(t) satisfies the anti-migration property. Constant. Wherein For polygonal regions in The area of ​​intersection between the region and the lattice unit at any intermediate position determined by t during the entire process of translating one cycle in the direction is the area of ​​the opposite direction.

[0030] ; Coincident area function It is differentiable almost everywhere in the set S, and its derivative is: ; in This represents any point within the boundary of a polygonal region inside a lattice unit after translation. The external normal vector is denoted by ds, where ds is the arc length element. This derivative expression represents that the change in the coincident area is determined solely by the surface flux penetrating or entering the boundary.

[0031] because Consisting of a finite number of line segments Composition, the above formula can be written as: ; in For the edge unit external normal direction, Representative side Within the total translation range The degree of translation within the period, t=0 represents the original position, t=1 represents the translation to the position of the first period. According to condition ③, we know... Since conditions ①, ②, and ④ can be considered as sides of a polygon, their opposite sides can be obtained through a periodic translation, and this translation is determined by the addition of two periodic vectors, it is clear that the relative positions of these two sides and their nearby common-plate array elements are exactly the same. Therefore, we can conclude that: ; Therefore, for each pair of E and For all cases (i=1,2,3…), we have: ; Summing over all the edges of the polygonal region yields a derivative that is always zero, meaning that the change in A(t) over one period is always zero. This indicates that the area directly opposite does not change during horizontal translation, thus demonstrating its resistance to displacement. This proves the point.

[0032] ; As demonstrated above, the relationship between the facing areas of the receiving plate and the common plate array unit is independent of the specific shape of the plate. Coupled devices whose outer boundaries of the receiving plate meet the above conditions can achieve anti-horizontal offset capability within the maximum allowable offset range, thereby achieving multi-receiving plate compatibility and adapting to the shape and application scenarios of different power receiving devices.

[0033] The periodic equidistant arrangement of common-plate array elements in the transmitter design of the coupling device provides a design reference for the receiver side. In the receiver design, the shape of the receiver plates that can be used on the array is designed using the periodic vector determined in the transmitter design of the coupling device, ensuring compliance with anti-horizontal offset requirements.

[0034] Example 1 This application addresses the compatibility issues of current electric field coupling devices with multiple receiving plates. Based on a single-end contact array electric field coupling power transmission system, it provides a device design that enables a single transmitting array to be compatible with multiple receiving plates. Based on the design method of this application for a single-end contact electric field coupling power transmission device with multiple receiving plates, the designed single-end contact electric field coupling power transmission device with multiple receiving plates is as follows: Figures 2 to 7As shown, the electric field coupled power transmission device includes a coupling device transmitting side 1 (power transmission part) and a coupling device receiving side 2 (power receiving part). The coupling device transmitting side 1 includes a transmitting electrode 11, a first dielectric layer 12, and a common electrode 13; the coupling device receiving side 2 includes a receiving electrode 21, and the available receiving electrode 21 includes, but is not limited to, a rectangular receiving electrode 211, a hexagonal receiving electrode 212, and a special receiving electrode 213; a second dielectric layer 22; and a short-circuit ring 23, and the available short-circuit rings 23 include, but are not limited to, a rectangular short-circuit ring 231, a hexagonal short-circuit ring 232, and a special-shaped short-circuit ring 233. In this embodiment, the common plate 13 includes 37 common plate array units 14 with the same shape and area, arranged according to the vertex or midpoint position of the regular hexagonal auxiliary unit arrangement frame 151, and connecting lines 17 between the units. The transmitting plate 11 includes a large plate and a corresponding hollow unit 16. The receiving plate 21 determines the edge length and direction conditions of the compatible plate according to the periodic vector direction diagram 18.

[0035] Based on the vector direction design of the transmitting side 1 of the coupling device, this embodiment provides three receiving electrode plate 21 structures that meet the conditions: rectangular receiving electrode plate 211, hexagonal receiving electrode plate 212 and special-shaped receiving electrode plate 213; all of the above electrodes plate meet the boundary matching conditions of the receiving electrode plate 21 given in this application, and can realize the anti-offset capability of the array device. The receiving electrode plate 21 that meets the anti-offset condition includes, but is not limited to, these three examples.

[0036] The rectangular receiving plate 211 uses two periodic vectors, with their directions differing by 90 degrees. Both the long and short sides have one period, and the difference is... The long side can be translated by a periodic vector in the direction of the short side to obtain the corresponding long side, and the short side is translated in the same way; the hexagonal receiving plate 212 uses 3 periodic vectors, the vector directions differ by 60 degrees, and each has the same period length. The four short sides are one period long, and the two opposite long sides are twice the period long. A certain short side can be translated to its corresponding short side by adding the other two unrelated periodic vectors, and the translation of the long side is the same; the special-shaped receiving plate 213 uses 3 periodic vectors with relative angle relationships of 0 degrees, 30 degrees and 90 degrees, and the length of each is one period length in the direction of the vector. The method of taking the translation vector is the same as that of the hexagonal plate.

[0037] In this device, the area of ​​the receiving plate 21 and the common plate 13 facing each other remains constant during translation. Since the total area of ​​the receiving plate 21 remains constant in a set of receiving devices, the area of ​​the receiving plate 21 and the transmitting plate 11 facing each other also remains constant. The relative positions of the transmitting common plate 13 and the transmitting plate 11 are fixed in a set of devices, determined by the ideal parallel plate capacitor formula: ; In the formula, C is the capacitance, k is the electrostatic constant of the dielectric between the two plates, S is the area of ​​the two plates facing each other, and D is the distance between the two plates. is the dielectric constant of the dielectric between the two plates.

[0038] In this way, the equivalent capacitances of the device in the single-end contact structure remain unchanged, thus realizing the device's anti-horizontal offset function.

[0039] The short-circuit ring 23 is determined according to the outer edge of the corresponding receiving electrode 21. Rectangular receiving electrode 211, hexagonal receiving electrode 212, and specially shaped receiving electrode 213 each have a rectangular short-circuit ring 231, a hexagonal short-circuit ring 232, and a specially shaped short-circuit ring 233, respectively. The number of common electrode array units 14 is determined by the actual application. The shapes of the first dielectric layer 12 and the second dielectric layer 22 are determined by the outer contour of each electrode, and their areas should be greater than or equal to the area of ​​the corresponding electrode. In this application, all electrodes are made of copper foil material with a thickness of 0.3 mm; all dielectric layers are made of acrylic material with a thickness of 1 mm. The vertical positional relationship of each device is from top to bottom: receiving electrode 21, second dielectric layer 22, short-circuit ring 23, common electrode 13, first dielectric layer 12, and transmitting electrode 11, with each device placed close together.

[0040] In this embodiment, the following specific description is given for the device using a regular hexagonal common plate array unit 141: After the relative position of the common plate array unit 14 at the center of the common plate 13 on the plane is confirmed, the remaining common plate array units 14 are arranged according to the vertex and midpoint positions of the regular hexagonal auxiliary unit arrangement frame 151. The common plate 13 as a whole includes 37 common plate array units 14, which are arranged in a regular hexagonal pattern. The inter-unit connection line 17 is a horizontal connection line connecting the midpoint of the outermost unit of the common plate 13 to the midpoint of each internal unit. It is 5mm wide and 0.3mm thick, and should be integrally formed with the copper foil of each unit to ensure effective connection between the common plate array units 14 and to prevent the thickness of the connection line at the joint with the common plate array unit 14 from increasing and affecting the contact effect of the subsequent receiving side short-circuit ring 23. The shape of the hollow unit 16 of the emitting electrode plate 11 is the same as that of the common electrode plate array unit 14, and their vertical positions should be aligned. The centroids of the common electrode plate array unit 14 and the hollow unit 16 should be on the same vertical line.

[0041] In this embodiment, the side length of the hollow unit 16 is a1, and the side length of the common plate array unit 14 is a2. Therefore, a1 should be satisfied. a2; The side length of the auxiliary unit layout frame 15 is a1(1+ )mm. It should be specifically explained that the common electrode array unit 14 and the hollowed-out unit 16 share a set of auxiliary unit arrangement frames 15 to ensure a corresponding vertical position. However, this auxiliary unit arrangement frame 15 is entirely determined by the hollowed-out unit 16, which is precisely manifested in the fact that the distance between two adjacent hollowed-out units 16 and the nearest side to each other is the side length of the hollowed-out unit 16. The outer contour of the emitter electrode 11 and the first dielectric layer 12 are in the form of a regular hexagon with a side length of 3.5a1(1+ (mm) This size ensures that the electrode plate and dielectric layer can precisely and completely support all units of the common electrode plate 13. Specific structures of the compatible receiving electrode plate 21 include, but are not limited to, the following examples: a rectangular receiving electrode plate 21 with a length of... a1(1+ )mm, width a1(1+ )mm, the length and width of the edges coincide with a certain periodic vector direction (illustrated 18), and the lengths are all the period lengths in that vector direction; the four short sides of the hexagonal receiving plate 212 are a1(1+ )mm, which is the period length in the corresponding vector direction, and the lengths of the two longer sides are 2a1(1+ ) mm, which is twice the period length in the corresponding vector direction; the four short sides of the special-shaped receiving plate 213 are the same as those of 212, and the two long sides are longer than 212. a1(1+ The length of each side is the period length in the direction of the vector. The three differently shaped receiving plates 21 all achieve anti-horizontal offset capability by satisfying the same array compatibility conditions, representing the feasibility of a single transmitting array being compatible with the selection conditions of multiple receiving plates 21. Rectangular short-circuit rings 231, hexagonal short-circuit rings 232, and special-shaped short-circuit rings 233 are applied to rectangular receiving plate 211, hexagonal receiving plate 212, and special-shaped plate 213, respectively, with a thickness of 0.3 mm. The second dielectric layer 22 has the same dimensions as the receiving plate 21 and is positioned vertically in the same location.

[0042] Other receiving plates with shapes not shown in this embodiment can also achieve compatibility if their outer boundaries meet the following numerical and directional conditions: Determine all available periodic vector directions in the array (schematic 18). Align one edge of the receiving plate 21 with the direction of one of the vectors in the periodic vector direction scheme (schematic 18). The plate must first satisfy the condition that the length of this edge is an integer multiple of the period length in that direction. For example... Figure 2 As shown in the top view, with the horizontal leftward direction as the positive x-axis, the vertical downward direction as the positive y-axis, and the counterclockwise direction as the angle increasing direction, then if the edge length of the remaining sides of the receiving plate 21 in the periodic vector directions of 0 degrees, 60 degrees, and 120 degrees is m1a1(1+ )mm (m1=0,1,2,3,4,5,6), or the edge length in the periodic vector direction of 30 degrees, 90 degrees, and 150 degrees is m2a1(1+ If m1 = 0, 1, 2, then it is also compatible with the transmitting array. The size of m1 and m2 is determined by the physical structure of the electrical equipment and the maximum limit offset area of ​​the array. The restrictions on the value of m in parentheses above only apply to this embodiment. Different array sizes have different restrictions on the value of m.

[0043] The width and thickness of the short-circuit ring 23 and the inter-unit connection line 17 are sufficient to allow a current of approximately 10A to pass through, with a load resistance of 10... For example, it can achieve an energy output of about 1kW. Its dimensions must be adjusted to ensure safety for different energy transmission performance requirements. The current here is the maximum permissible effective value of AC current that the cross-sectional area of ​​the copper foil used in this device can pass through at room temperature. The energy transmission level given here does not consider the voltage boosting and current reducing effect of the compensation network in common electric field-coupled wireless power transmission systems. In practical applications, the primary and secondary compensation networks connected to both sides of the coupling device will increase the voltage of each plate in the coupling device and reduce the current flowing through the plates while maintaining a constant output power, thereby further increasing the upper limit of the power that the physical structure of the coupling device can withstand.

[0044] The contact area between the short-circuit ring 23 and the common plate 13 cannot be too small, otherwise it will lead to poor short-circuit contact; however, it cannot be too large either, because the short-circuit ring 23 is essentially the same as the common plate 13 in terms of electrical properties. If its area is too large, it will increase the area of ​​the transmitting plate 11 and the short-circuit ring 23, which is actually the same as the common plate 13, thus increasing the additional self-capacitance on the transmitting side and affecting the coupling capability. To balance the above two constraints, the projected area of ​​the short-circuit ring 23 is specified to be less than or equal to 10% of the projected area of ​​the receiving plate 21, and the upper limit of the width of the short-circuit ring 23 at its widest point is the length a2 of the common plate array unit 14, and the lower limit of the narrowest point is 5mm; the minimum rhomboid shape that meets the design specifications of the receiving plate 21 cannot be used as the receiving plate 21, because there is a risk that the corresponding short-circuit ring 23 cannot make short-circuit contact with any common plate array unit 14. The above design requirements can ensure that the short-circuit connection of the short-circuit ring 23 is good. The minimum contact area between the short-circuit ring 23 and the common plate 13 is determined by the width of the short-circuit ring 23 and the side length of the common plate array unit 14, and the minimum allowable area is determined by the maximum operating current of the coupling device.

[0045] Because the width of the inter-unit connection line 17 directly affects the anti-offset effect, if it is too wide, the equivalent capacitance will change too much; if it is too thin, the copper foil will overheat when a large current passes through, which may easily lead to safety risks. To balance the above factors, the width of the inter-unit connection line 17 should meet the condition that the total projected area of ​​the inter-unit connection line 17 is less than or equal to 20% of the total projected area of ​​the common plate array unit 14, with a lower limit of 5mm. This design scheme is determined based on the maximum current that may flow through the plate in actual applications.

[0046] In this embodiment, the power transmission device does not consider the influence of the structure, materials, and location of the electrical equipment on the electrical properties of the device. In practical applications, improvements can be made based on this invention.

[0047] All the actual structures given in this embodiment are special cases that satisfy the design method provided in this application. The area of ​​all the plates is determined according to the actual application. The number of common plate array units 14 is determined by the plate area.

[0048] In this embodiment, the projection of the common-plate array unit 14 onto the xy-plane can be of any shape, such as a regular hexagon, square, rectangle, circle, or other irregular shape, such as... Figure 8 As shown, Figure 8 To use the square common-plate array unit 142 in a regular hexagonal arrangement, the rhombus shape of the receiving plate 21 satisfies the design conditions proposed in this application and also satisfies the anti-horizontal offset effect. Moreover, the rhombus shape is not the only type of plate that satisfies the anti-horizontal offset effect.

[0049] exist Figure 8 In this case, because a square common-plate array unit 142 is used, the limitation on the edge length of the receiving plate 21 based on the side length a1 of the hollow unit 16 is no longer applicable. However, the idea of ​​periodic vectors can still be used as... Figure 8 The device structure design is shown. Let the minimum periodic vector length be d1, which is the minimum distance between adjacent units in the hollow unit 16 design. Within this given array size, there are also... The periodic vector length is d1. Since the arrangement frame 151 of the regular hexagonal auxiliary unit remains unchanged, the direction of the periodic vector is the same as that of the original hexagonal unit device, but the allowable edge length of the receiving plate 21 should be modified accordingly to m1d1. m2d1. Relevant dimensions are marked on... Figure 8 In the array, m1 and m2 are determined by the array size. The diamond-shaped receiving electrode 214 (correspondingly configured with a diamond-shaped short-circuit ring 234) satisfies the design conditions of this application as the shape of the receiving electrode 21, and also satisfies the anti-horizontal offset effect. Moreover, there is more than one type of electrode that satisfies the anti-horizontal offset effect.

[0050] Example 2 The example given in Embodiment 1 of this application uses a regular hexagonal arrangement, utilizing the property that the distance between the midpoint and each vertex of a regular hexagon is equal to match this design method. However, this does not mean that there is only one way to arrange the units. Figure 9 As shown, the arrangement of regular quadrilaterals also satisfies this condition. The receiving plates 21 in both rectangular and parallelogram shapes can achieve the effect of resisting horizontal offset, and are not limited to these two shapes.

[0051] exist Figure 9 In this array, because a square auxiliary unit arrangement frame 152 is used, the available periodic vectors change. Let d2 be the minimum distance between adjacent units when using the square auxiliary unit arrangement frame 152; this distance is the minimum periodic vector length. This array has three available periodic vector directions, as described below: Using a standard two-dimensional Cartesian coordinate system as a reference, the allowable edge lengths of the receiving plate 21 in the 0-degree and 90-degree periodic vector directions are m1d2 (m1=0,1,2,3,4), and the allowable edge lengths in the 45-degree and 135-degree directions are... For m2d2 (m2=0,1,2,3), the allowable edge lengths in the directions of 26.6 degrees, 63.4 degrees, 116.6 degrees, and 153.4 degrees are: m3d2 (m3=0,1,2). Any edge of the receiving plate 21 that meets the above design requirements can be used. The values ​​of m1, m2, and m3 are also determined by the physical structure of the electrical equipment and the maximum limiting offset area of ​​the array. The above restrictions on the value of m only apply to this embodiment; different array sizes have different restrictions on the value of m. It should be noted that... Figure 9 Two receiving plates 21 (rectangular receiving plate 211 and parallelogram receiving plate 215) are placed on one of the transmitting side arrays, and rectangular short-circuit rings 231 and parallelogram short-circuit rings 235 are respectively configured. This does not mean that the transmitting device can operate two receiving plates 21 at the same time. It is only used to show the shape of the receiving plate 21 that can be compatible in this embodiment.

[0052] like Figure 10 As shown, according to this design method, the distance between each common plate array unit 14 is determined by the actual application. For any distance, provided the practical application requirements are met, there exists a corresponding design method for the receiving plate 21. This distance is the absolute value of the periodic vector (the distribution period length of the common plate array unit 14) mentioned throughout the text. Without practical application constraints, this distance is not mathematically restricted in its shape design; it only needs to satisfy the physical constraints (such as changes in plate area and shape due to distance changes, leading to changes in coupling capacitance parameters and circuit parasitic parameters). These constraints are, in fact, determined by the practical application.

[0053] Figure 10 The diagram includes both densely packed and sparsely packed hexagonal common-plate array units 141. It can be seen that the arrangement of these two types of common-plate array units 14 is the same, both being hexagonal arrangements. However, the distance between a common-plate array unit 14 and its adjacent common-plate array unit 14 differs in the two diagrams; the distance for densely packed units is d. 11 The sparse paving distance is d 12 At this time d 11 <d 12 In general, the distance between the common-plate array elements 14, the number of common-plate array elements 14, and the outer contour size of the common-plate 13 (which is also the outer contour size of the emitter plate 11) are mutually constrained, and ultimately determined by the actual application. The distance d between adjacent elements is the absolute value length of the smallest periodic vector in the entire text; the lengths differ in tessellation and sparse tessellation. However, since both are arranged in regular hexagons, the directions of the usable periodic vectors are the same.

[0054] The cutouts in the emitting electrode 11 correspond one-to-one with the shapes and positions of all units in the common electrode 13. The receiving electrode 21 is designed according to the shape determined by the above periodic vector properties.

[0055] In practical applications, the periodic arrangement of the transmitting array is determined in advance based on the application scenario (which includes not only the environmental factors on the transmitting side, but also the needs of the pre-determined power-consuming equipment). After determining the arrangement, it is specified which shapes of receiving plates 21 the transmitting array can be compatible with. Then, based on the actual environment of each power-consuming side, it is determined which receiving plate 21 from the series of receiving plates 21 that meet the compatibility conditions should be used by the power-consuming equipment.

[0056] The single-end contact structure transmitting device designed based on this application is compatible with receiving plates 21 of various shapes, and all compatible receiving plates 21 can achieve anti-horizontal offset capability on this array.

[0057] The design scheme provided in this application offers the advantage of compatibility while also presenting a complete array design procedure. Following this procedure, any array that satisfies the requirement of resisting horizontal offset can be designed. Mathematically, there are infinitely many possible array structures designed according to this procedure. At the mathematical level: the shape of the cells can be arbitrarily chosen; the arrangement of the cells can also be arbitrarily set as long as the condition of periodic equidistant distribution between adjacent cells is met; the distance between adjacent cells can also be arbitrarily set; the overall area of ​​the array should be greater than the area of ​​the largest possible receiving plate 21, but this can also be arbitrarily set under this condition. This universal design method provides high freedom and multiple choices for subsequently determining a suitable specific device architecture by combining physical (electrical) properties with practical applications.

[0058] This design scheme also provides compatibility rules for the receiving electrode 21 in this high-degree-of-freedom transmitter array design. Based on the requirement that the array should resist horizontal offset, these rules utilize the constraint in the general design rules for transmitter arrays that the cells must be periodically and equidistantly distributed, specifying shape compatibility conditions for the receiving electrode 21 based on periodic vectors. These conditions also possess high degrees of freedom; all transmitter array examples built using the aforementioned general design method can apply these compatibility rules during the selection or fabrication of the receiving electrode 21's shape. Receiving electrodes 21 obtained according to these rules all possess resistance to horizontal offset.

[0059] A hollow unit 16 is designed on the emitter plate 11, corresponding vertically to the common plate array unit 14, and the centroid of each hollow unit 16 is aligned with the centroid of the corresponding common plate array unit 14 on the same vertical line. The position of the hollow unit 16 on the emitter plate 11 in the emitter side 1 of the coupling device is the vertical relative position of each unit of the common plate 13. The centroid of each unit in the common plate 13 must be aligned with the centroid of each hollow part of the emitter plate 11 to ensure that the capacitance edge effect between the emitter plate 11 and the common plate 13 remains uniform around each unit.

[0060] The emitter plate 11 and the first dielectric layer 12 are designed such that their projected outer contours in the xy plane are identical, and both projected outer contours encompass the graphic boundary of the outermost unit of the common plate 13.

[0061] The hollow unit 16 is designed so that its shape projected onto the xy plane is the same as that of the common plate array unit 14 projected onto the xy plane, and the projection of the hollow unit 16 onto the xy plane completely coincides with the projection of the common plate array unit 14 onto the xy plane, or it is a proportionally enlarged projection of the common plate array unit 14 with the centroid of both as a reference point. This ensures that there is no directly opposite area between the emitting plate 11 and the common plate 13, thereby reducing the self-capacitance on the emitting side and improving the energy transfer efficiency.

[0062] The short-circuit connector is designed as a hollow annular short-circuit ring 23 arranged along the outer contour of the receiving electrode 21, and the projected area of ​​the short-circuit ring 23 in the xy plane is less than or equal to 10% of the projected area of ​​the receiving electrode 21 in the xy plane.

[0063] In a single-ended contact structure, the shape and area of ​​the receiving dielectric and short-circuit ring 23 are completely determined by the receiving electrode 21. Therefore, once the shape of the receiving electrode 21 is determined to be compatible, the receiving dielectric and short-circuit ring 23 that can be matched with it are also determined.

[0064] To reduce the self-capacitance on the receiving side and improve the power transmission efficiency, the area of ​​the short-circuit ring 23 is much smaller than the area of ​​the receiving plate 21. However, in order to ensure that the short-circuit ring 23 and the array of common plates 13 maintain good short-circuit contact to ensure that the power transmission system can form a smooth loop, the area of ​​the short-circuit ring 23 cannot be too small. During the translation process, it must be ensured that a part of its area is in direct contact with the common plate array unit 14. In order to improve the adaptability of the short-circuit ring 23, in this embodiment, the short-circuit ring 23 is set along the outer contour of the receiving plate 21.

[0065] As a feasible alternative, the short-circuit connector is designed as a short-circuit board, and the xy-plane projection of the short-circuit board does not coincide with the xy-plane projection of the receiving electrode 21.

[0066] The short-circuit ring 23, which is the part that directly short-circuit contacts the transmitting side 1 and the receiving side 2 of the coupling device, can be replaced by a complete electrode plate. However, the short-circuit electrode plate must not have a directly opposite area with the receiving electrode plate 21 to prevent the directly opposite area of ​​the receiving electrode plate 21 and the common electrode plate 13 or the transmitting electrode plate 11 from being blocked during the translation process, which would cause the coupling capacitance to change.

[0067] The area and shape of the short-circuit plate should ensure a large short-circuit contact area with the common plate array unit 14 at any offset position of the receiving plate 21. During the design process, the short-circuit contact area should not be too large to prevent weakening the resistance to horizontal offset, but it should be greater than or equal to the minimum contact area between the receiving plate 21 and the common plate array unit 14 when using the short-circuit ring 23. The positional relationship between the short-circuit plate and the receiving plate 21 should be as close as possible to ensure that the maximum offset range of the device can be fully utilized.

[0068] For the initial condition that the distance between adjacent units is equal, the arrangement design of the common plate array unit 14 and the hollow unit 16 includes, but is not limited to, square arrangement and regular hexagonal arrangement.

[0069] The design of a regular hexagonal arrangement is carried out according to the following steps; First, determine the position of the hollow unit 16 located at the center of the emitting electrode plate 11. With the centroid of the hollow unit 16 as the midpoint of the central regular hexagonal frame, place regular hexagonal frames of the same shape and size close to the boundary of the frame. Set the hollow units 16 at the vertices and midpoints of the regular hexagonal frames, and the relative position relationship between the centroid of each hollow unit 16 and the corresponding vertex or midpoint is consistent. Determine the number and position of the hollow units 16 according to the size and shape of the required array, and then determine the outer boundary of the common electrode plate 13 and the emitting electrode plate 11.

[0070] The design of the inter-unit connection line 17 includes: designing the inter-unit connection line 17 so that its projected area in the xy plane is as small as possible; The connection method for the inter-unit connection line 17 is as follows: All common plate array units 14 are connected into a whole by inter-unit connection lines 17, and the minimum number of inter-unit connection lines 17 is used while meeting the overcurrent requirements of the inter-unit connection lines 17.

[0071] The inter-unit connection line 17 should ensure sufficient current carrying capacity to prevent overheating damage due to excessive current in actual applications. The connection method of the inter-unit connection line 17 should balance the condition of connecting the maximum number of units with the minimum number of connections and the current balance condition between the inter-unit connection lines 17.

[0072] The design for a square layout follows these steps: First, the position of the hollow unit 16 located at the center of the emitting electrode plate 11 is determined. Taking the centroid of this hollow unit 16 as the lower left vertex of a square frame, hollow units 16 are placed at each vertex of the square frame, with the centroid of each hollow unit 16 aligned with the lower left vertex of the square frame along its four sides. The relative position of the centroid of each hollow unit 16 to its corresponding vertex is consistent. The number and position of the hollow units 16 are determined according to the required array size and shape, thereby determining the outer boundaries of the common electrode plate 13 and the emitting electrode plate 11. The design of the connecting lines 17 between the units is consistent with that of the hexagonal frame.

[0073] The second dielectric layer 22 is designed such that its projection shape in the xy plane is the same as the projection shape of the receiving electrode 21 in the xy plane, and the projection area of ​​the second dielectric layer 22 in the xy plane is greater than or equal to the projection area of ​​the receiving electrode 21 in the xy plane.

[0074] This invention designs an array electric field coupling power transmission device for a single-end contact structure. This device can be adapted to meet the needs of practical applications and realize the function of a single transmitting-side array compatible with receiving plates 21 of various shapes and areas. Moreover, using a coupling device compatible with receiving plates 21, the size of each equivalent capacitance can be stabilized during horizontal translation within a set maximum misalignment range.

[0075] The device determines the length and direction of each edge of the receiving plate 21 that can be applied to the transmitting side array based on the arrangement period length and direction of the common plate array unit 14 on the transmitting side. This ensures that the area of ​​the receiving plate 21 facing the transmitting plate 11 and the common plate 13 remains unchanged during the horizontal translation process, thereby ensuring that the capacitance between each plate remains stable and realizing the anti-horizontal offset capability of the coupling device.

[0076] This invention proposes a device design based on a single-end contact array electric field coupling power transmission system, enabling a single transmitting array to be compatible with multiple receiving plates 21. The design utilizes the periodic arrangement of the common plate array units 14 in the transmitting array to design the shape, area, and placement orientation of the compatible receiving plates 21. The transmitting side 1 of the coupling device includes a transmitting plate 11, a first dielectric layer 12, and a common plate 13, and is mounted on a flat platform where the material has minimal impact on the device's electrical properties. The receiving side 2 of the coupling device includes a receiving plate 21, a second dielectric layer 22, and a short-circuit ring 23, positioned on the part of the electrical equipment that is in direct contact with the ground in its natural placement state. This allows for natural contact between the short-circuit ring 23 and the common plate 13 on the transmitting side, thereby achieving a short-circuit connection. In this single-end contact structure, the transmitting plate 11 and the receiving plate 21 serve as the primary and secondary terminals of the high-voltage side, respectively, connected to the positive terminals of their respective compensation networks. The common plate 13 and the short-circuit ring 23 are short-circuited together as the low-voltage side, connected to the negative terminals of the compensation networks on both sides. Each plate, together with the compensation network, power conversion devices, power supply, and electrical equipment, forms a complete power transmission system topology.

[0077] The device provided in this application has the ability to power multiple types of electrical equipment within a single working area in scenarios requiring convenient power replenishment, thus avoiding the problems of excessive cost and large footprint associated with installing separate power replenishment devices for each device. Simultaneously, the use of an array-type electric field coupling scheme addresses the need for resistance to horizontal offset in practical scenarios. The common electrode array unit 14 and its corresponding hollow unit 16 on the transmitting side 1 of the coupling device exhibit a periodic arrangement along several directions. Based on this pattern, this application determines the conditions for judging whether the receiving electrode 21 is compatible with the array: the direction of each edge of the electrode is parallel to a certain periodic vector direction of the array on the transmitting side 1 of the coupling device, and each edge has a corresponding edge parallel to it and of equal length, the length of which is an integer multiple of the periodic length in that direction. The receiving electrode 21 that meets the above conditions can maintain an unchanged area facing the common electrode 13, thereby satisfying the device's resistance to horizontal offset. Each electrode plate is connected to the corresponding compensation network terminal, and the integrated power conversion device, excitation source and power-consuming equipment form a complete power transmission system, which can be used for a series of power-consuming equipment.

[0078] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A design method for a single-end contact electric field coupling power transmission device compatible with multiple receiving plates, wherein the single-end contact electric field coupling power transmission device includes a transmitting side and a receiving side of the coupling device, wherein the transmitting side of the coupling device sequentially includes a transmitting plate, a first dielectric layer, and a common plate, and the receiving side of the coupling device sequentially includes a receiving plate, a second dielectric layer, and a short-circuit connector, wherein the transmitting plate and the common plate serve as the primary and secondary terminals of the high-voltage side, respectively, and the receiving plate and the short-circuit connector are short-circuited to serve as the low-voltage side, characterized in that... Includes the following steps: The common plate is designed to include multiple common plate array units arranged in the xy plane, periodically distributed and of the same shape, such that the center distance between each common plate array unit and all its adjacent common plate array units is equal, and inter-unit connection lines are set between the common plate array units. The common plate array units have at least two periodic distribution directions. Design the receiving plate such that its projection on the xy plane satisfies the following conditions: the direction of each edge is parallel to one of the periodic distribution directions of the common plate array elements; each edge has a corresponding edge that is parallel to it and of equal length; the length of each edge is a positive integer multiple of the distribution period length of the common plate array elements in that direction, and the upper limit of the length is the length of the array boundary; the outer boundary of the receiving plate's projection on the xy plane consists of a finite number of edges.

2. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 1, characterized in that: A hollow unit is designed on the emitter plate that corresponds one-to-one with the common plate array unit in the vertical direction, and the centroid of each hollow unit is on the same vertical line as the centroid of the corresponding common plate array unit.

3. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 1, characterized in that: The emitter plate and the first dielectric layer are designed such that their projected outer contours in the xy plane are identical, and both projected outer contours encompass the graphic boundary of the outermost unit of the common plate.

4. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 2, characterized in that: The hollow unit is designed so that its shape in the xy plane projection is the same as that in the xy plane projection of the common plate array unit, and the hollow unit's projection in the xy plane completely overlaps with the common plate array unit's projection in the xy plane, or it is a proportionally enlarged projection of the common plate array unit with the centroid of both as a reference point.

5. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 1, characterized in that: The short-circuit connector is designed as a hollow annular short-circuit ring arranged along the outer contour of the receiving electrode, and the area of ​​the short-circuit ring projected in the xy plane is less than or equal to 10% of the area of ​​the receiving electrode projected in the xy plane.

6. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 5, characterized in that: The short-circuit connector is designed as a short-circuit board, and the xy-plane projection of the short-circuit board does not overlap with the xy-plane projection of the receiving electrode.

7. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 2, characterized in that: The arrangement design of the common plate array unit and the hollow unit is based on the following steps: First, determine the position of the hollow unit located at the center of the emitter plate. With the centroid of the hollow unit as the midpoint of the central regular hexagonal frame, place regular hexagonal frames of the same shape and size close to the boundary of the frame. Set the hollow units at the vertices and midpoints of the regular hexagonal frames, and the relative position relationship between the centroid of each hollow unit and the corresponding vertex or midpoint is consistent. Determine the number and position of the hollow units according to the size and shape of the required array, and then determine the outer boundary of the common plate and the emitter plate.

8. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 1, characterized in that: The design of the inter-unit connection lines includes: designing the inter-unit connection lines so that the total projected area of ​​the inter-unit connection lines in the xy plane is less than or equal to 20% of the total projected area of ​​the common plate array units in the xy plane; The connection method for the inter-unit connection lines is as follows: All common plate array units are connected into a whole by inter-unit connection lines, and the minimum number of inter-unit connection lines is used while meeting the overcurrent requirements of the inter-unit connection lines.

9. The design method of the single-end contact electric field coupling power transmission device compatible with multiple receiving plates according to claim 1, characterized in that: Design a second dielectric layer such that its projection shape in the xy plane is the same as the projection shape of the receiving electrode in the xy plane, and the projection area of ​​the second dielectric layer in the xy plane is greater than or equal to the projection area of ​​the receiving electrode in the xy plane.

10. A single-end contact electric field coupling power transmission device compatible with multiple receiving plates, characterized in that, The design was performed using the design method of a single-end contact electric field coupling power transmission device compatible with any of claims 1-9.

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