High-voltage alternating current field power extraction device
By using a high-voltage AC electric field energy harvesting device, alternating charges are induced in the high-voltage AC electric field through an interdigitated electrode array layer, which solves the problem of instability in traditional energy harvesting methods and realizes efficient and stable power supply for power monitoring equipment. The device is miniaturized and avoids tip discharge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CLP XINYUAN (BEIJING) POWER TECH CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional high-voltage power monitoring equipment suffers from insufficient power extraction during power outages or when current is low. CT power extraction is unstable, and photovoltaic power extraction is affected by sunlight, leading to unstable power supply for power monitoring equipment.
The device employs a high-voltage AC electric field energy harvesting system. It induces alternating charges in the high-voltage AC electric field through a series interdigitated electrode array layer, and uses an energy conversion circuit to convert the alternating electrical energy into direct current, thereby improving the energy harvesting efficiency. The system includes a bottom shell, a bottom plate, an interdigitated electrode array layer, a clamping structure, and lead-out terminal design.
It achieves continuous and stable power supply in a high-voltage AC electric field, improves energy harvesting efficiency, and minimizes the device while avoiding the tip discharge effect.
Smart Images
Figure CN224502978U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of AC electric field energy harvesting technology, and in particular to a high-voltage AC electric field energy harvesting device. Background Technology
[0002] With the continuous development and intelligentization of power systems, higher requirements are being placed on the monitoring and maintenance of power equipment. Traditional high-voltage power monitoring equipment typically relies on current transformers (CTs) or photovoltaic (PV) power sources. CT power generation is dependent on current magnitude; during power outages or when the current is very low, CT power generation is insufficient to support continuous equipment operation. PV power generation is affected by sunlight, resulting in significant uncertainty. High-voltage alternating current (AC) electric field power generation, as a novel energy extraction method, utilizes the electric field coupling effect to induce alternating charges. Through an energy conversion circuit, the alternating electrical energy is converted into usable direct current (DC). This method can directly extract energy from the high-voltage AC electric field, providing a continuous and stable power supply for power monitoring equipment, but it requires improved energy extraction efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a high-voltage AC electric field energy harvesting device to improve the energy harvesting efficiency in a high-voltage AC electric field.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A high-voltage alternating current electric field energy harvesting device includes a bottom shell and a base plate installed inside the bottom shell. Several layers of series interdigitated electrode arrays are stacked on the base plate. A clamping structure for pressing the series interdigitated electrode arrays is installed inside the bottom shell. A top cover is installed on the bottom shell, and the top cover has lead-out terminals electrically connected to the series interdigitated electrode arrays. The series interdigitated electrode arrays include a PCB board and positive and negative interdigitated electrodes integrated on the PCB board. The positive and negative interdigitated electrodes are inserted opposite each other. One end of the PCB board has a first conductive terminal connected to the positive interdigitated electrode, and the other end has a second conductive terminal connected to the negative interdigitated electrode. Metal conductive layers are provided on the upper and lower surfaces of the positive and negative interdigitated electrodes extending from the PCB board.
[0006] Preferably, the ends of both the positive interdigitated electrode and the negative interdigitated electrode are semi-circular structures with a radius R of 0.025 mm.
[0007] Preferably, the misalignment distance between the positive interdigitated electrode and the negative interdigitated electrode is 0.243 mm.
[0008] Preferably, the PCB board is provided with a first protrusion for positioning the first conductive terminal, and the PCB board is provided with a second protrusion for positioning the second conductive terminal.
[0009] Preferably, a first limiting plate and a second limiting plate are spaced apart inside the bottom shell, the first limiting plate and the second limiting plate separating the interior of the bottom shell into a first limiting cavity, an electrode cavity and a second limiting cavity; the first limiting plate has a first opening connecting the first limiting cavity and the electrode cavity, and the second limiting plate has a second opening connecting the electrode cavity and the second limiting cavity; when the PCB board is placed in the electrode cavity, the first protrusion is located in the first limiting cavity and the second protrusion is located in the second limiting cavity; a clamping structure is installed in both the first limiting cavity and the second limiting cavity.
[0010] Preferably, the clamping structure includes a pressure plate and fasteners spaced at both ends of the pressure plate, the fasteners being locked inside the bottom shell.
[0011] Preferably, a first connecting post is provided in both the first limiting cavity and the second limiting cavity at intervals, and the fastener is locked on the first connecting post.
[0012] Preferably, a second connecting post is provided in both the first limiting cavity and the second limiting cavity at intervals, and the upper cover is locked onto the second connecting post by fasteners.
[0013] Preferably, the bottom shell has a positioning step at the opening, the top cover has a positioning protrusion that cooperates with the positioning step, and a sealing gasket is provided between the positioning step and the positioning protrusion.
[0014] Beneficial effects:
[0015] The bottom shell and top cover form an internal isolation, and are connected in series through several layers of interdigitated electrode arrays, thereby achieving high energy harvesting efficiency in a high-voltage AC electric field. The electrical energy is output to the outside through the lead-out terminals. Each layer of the series interdigitated electrode array includes a PCB board with integrated energy conversion circuitry. Positive and negative interdigitated electrodes are integrated on the PCB board, and a metal conductive layer is set on the extended end face to achieve the stacking of several layers, so that all corresponding positive interdigitated electrodes in the upper and lower layers are conductive, and all corresponding negative interdigitated electrodes are conductive. This enhances the induction of electric field coupling effect, improves energy harvesting efficiency, and achieves electrical energy output through the connection of the first conductive terminal, the second conductive terminal and the lead-out terminals, realizing continuous power supply to the outside. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0017] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;
[0018] Figure 3 This is a schematic diagram of the bottom shell structure in an embodiment of the present invention;
[0019] Figure 4 This is a schematic diagram of the structure of the series interdigitated electrode array layer in an embodiment of this utility model;
[0020] Figure 5 This is a partial schematic diagram of the series interdigitated electrode array layer in an embodiment of this utility model;
[0021] Figure 6 This is a schematic diagram of the structure of the integrated metal conductive layer of the positive interdigitated electrode and the negative interdigitated electrode in the embodiment of this utility model;
[0022] exist Figures 1 to 6 In the diagram, the correspondence between component names or lines and the drawing numbers is as follows:
[0023] Bottom shell 1, first limiting plate 101, second limiting plate 102, first limiting cavity 103, second limiting cavity 104, electrode cavity 105, first opening 106, second opening 107, first connecting post 108, second connecting post 109, positioning step 110, base plate 2, series interdigitated electrode array layer 3, PCB board 31, positive interdigitated electrode 32, negative interdigitated electrode 33, first conductive terminal 34, second conductive terminal 35, metal conductive layer 36, first protrusion 37, second protrusion 38, clamping structure 4, pressure plate 41, fastener 42, top cover 5, positioning protrusion 50, lead-out terminal 6. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0025] See Figures 1-6 As shown in the figure, an embodiment of this utility model proposes a high-voltage AC electric field energy harvesting device, including a bottom shell 1 and a bottom plate 2 installed inside the bottom shell 1. Several layers of series interdigitated electrode arrays 3 are stacked on the bottom plate 2. A clamping structure 4 for pressing the series interdigitated electrode arrays 3 is installed inside the bottom shell 1. A top cover 5 is installed on the bottom shell 1, and the top cover 5 is provided with lead-out terminals 6. The lead-out terminals 6 are electrically connected to the series interdigitated electrode arrays 3. After the several layers of series interdigitated electrode arrays 3 are pressed together by the clamping structure 4, series conduction is ensured. After the electric field coupling effect is induced in the high-voltage AC electric field, DC is generated and transmitted outward through the lead-out terminals 6. Furthermore, the top cover 5 and the bottom shell 1 form a protective layer inside, and the materials of the top cover 5 and the bottom shell 1 are non-metallic.
[0026] The series interdigitated electrode array layer 3 includes a PCB board 31 and positive interdigitated electrodes 32 and negative interdigitated electrodes 33 integrated on the PCB board 31. The positive interdigitated electrodes 32 and negative interdigitated electrodes 33 are inserted opposite each other. One end of the PCB board 31 is provided with a first conductive terminal 34 for connecting the positive interdigitated electrodes 32, and the other end is provided with a second conductive terminal 35 for connecting the negative interdigitated electrodes 33. The upper and lower end faces of the positive interdigitated electrodes 32 and negative interdigitated electrodes 33 extending out of the PCB board 31 are provided with metal conductive layers 36. An energy conversion circuit is integrated on the PCB board 31. Direct current is generated by the electric field coupling effect formed by the positive interdigitated electrodes 32 and negative interdigitated electrodes 33 in a high-voltage AC electric field. At the same time, the metal layer enables all the stacked positive interdigitated electrodes 32 and all the stacked negative interdigitated electrodes 33 to conduct, thereby further improving the current output efficiency and meeting the external power supply requirements.
[0027] Therefore, by stacking the series interdigitated electrode array layer 3 and achieving series conduction between adjacent layers through the metal layer, the energy harvesting efficiency in the high voltage AC electric field is improved. Of course, the principle of achieving AC electric field energy harvesting is existing. This embodiment mainly aims to improve energy harvesting efficiency in a smaller volume of space.
[0028] To avoid the generation of tip discharge effect during electric field coupling induction, the ends of the positive interdigital electrode 32 and the negative interdigital electrode 33 are both semi-circular structures with a radius R of 0.025 mm.
[0029] Meanwhile, the positive interdigitated electrode 32 and the negative interdigitated electrode 33 are staggered by 0.243mm, which meets the spacing requirements and can also effectively compress the overall laying length, further realizing the miniaturization of the overall device.
[0030] Specifically, the PCB board 31 is provided with a first bump 37 for positioning the first conductive terminal 34, and the PCB board 31 is provided with a second bump 38 for positioning the second conductive terminal 35. The first bump 37 and the second bump 38 can be positioned relative to each other when stacked, and the first conductive terminal 34 and the second conductive terminal 35 can be stacked and pressed together at their lead-out positions.
[0031] To achieve a limiting effect when stacking multiple layers of series-connected interdigitated electrode array 3, a first limiting plate 101 and a second limiting plate 102 are provided at intervals inside the bottom shell 1. The first limiting plate 101 and the second limiting plate 102 separate the interior of the bottom shell 1 into a first limiting cavity 103, an electrode cavity 105, and a second limiting cavity 104. Simultaneously, the first limiting plate 101 has a first opening 106 connecting the first limiting cavity 103 and the electrode cavity 105, and the second limiting plate 102 has an opening connecting the electrode cavity 105. When the PCB board 31 is placed in the electrode cavity 105, the second opening 107 of the second limiting cavity 104 has the first protrusion 37 located in the first limiting cavity 103 and the second protrusion 38 located in the second limiting cavity 104. Thus, the PCB board 31 is limited when it is stacked by dividing the cavity. At the same time, a clamping structure 4 is installed in both the first limiting cavity 103 and the second limiting cavity 104. After the two ends are clamped by the clamping structure 4, the positive interdigitated electrode 32 and the negative interdigitated electrode 33 in the middle can achieve conductive contact between the upper and lower layers.
[0032] The pressing structure 4 includes a pressure plate 41 and fasteners 42 spaced at both ends of the pressure plate 41. The fasteners 42 are locked inside the bottom shell 1. After the fasteners 42 are locked, the pressure plate 41 applies pressure to the stacked parts to ensure pressing.
[0033] In this embodiment, a first connecting post 108 is provided at intervals in both the first limiting cavity 103 and the second limiting cavity 104, and the fastener 42 is locked onto the first connecting post 108.
[0034] Meanwhile, a second connecting post 109 is provided at intervals in both the first limiting cavity 103 and the second limiting cavity 104. The upper cover 5 is locked onto the second connecting post 109 by fastener 42, thereby ensuring that the connecting locking part does not interfere with the middle sensing area.
[0035] In order to achieve a seal after the upper cover 5 and the bottom shell 1 are connected, and to avoid the risk of water leakage, a positioning step 110 is provided at the opening of the bottom shell 1, and a positioning protrusion 50 is provided on the upper cover 5 to cooperate with the positioning step 110. A sealing gasket is provided between the positioning step 110 and the positioning protrusion 50.
[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A high-voltage alternating current electric field energy harvesting device, characterized in that: Includes a bottom shell (1) and a bottom plate (2) installed inside the bottom shell (1). Several layers of series interdigitated electrode array (3) are stacked on the bottom plate (2). A clamping structure (4) for clamping the series interdigitated electrode array (3) is installed inside the bottom shell (1). A top cover (5) is installed on the bottom shell (1). A lead-out terminal (6) is provided on the top cover (5). The lead-out terminal (6) is electrically connected to the series interdigitated electrode array (3). The series interdigitated electrode array layer (3) includes a PCB board (31) and a positive interdigitated electrode (32) and a negative interdigitated electrode (33) integrated on the PCB board (31). The positive interdigitated electrode (32) and the negative interdigitated electrode (33) are inserted opposite each other. One end of the PCB board (31) is provided with a first conductive terminal (34) connected to the positive interdigitated electrode (32), and the other end is provided with a second conductive terminal (35) connected to the negative interdigitated electrode (33). The positive interdigitated electrode (32) and the negative interdigitated electrode (33) are provided with metal conductive layers (36) on the upper and lower ends of the PCB board (31) extending out of the PCB board (31).
2. The high-voltage AC electric field energy harvesting device according to claim 1, characterized in that: The ends of both the positive interdigitated electrode (32) and the negative interdigitated electrode (33) are semi-circular structures with a radius R of 0.025 mm.
3. The high-voltage AC electric field energy harvesting device according to claim 2, characterized in that: The offset distance between the positive interdigitated electrode (32) and the negative interdigitated electrode (33) is 0.243 mm.
4. The high-voltage AC electric field energy harvesting device according to claim 3, characterized in that: The PCB board (31) is provided with a first bump (37) for positioning the first conductive terminal (34), and the PCB board (31) is provided with a second bump (38) for positioning the second conductive terminal (35).
5. The high-voltage AC electric field energy harvesting device according to claim 4, characterized in that: The bottom shell (1) is provided with a first limiting plate (101) and a second limiting plate (102) spaced apart. The first limiting plate (101) and the second limiting plate (102) separate the bottom shell (1) into a first limiting cavity (103), an electrode cavity (105), and a second limiting cavity (104). The first limiting plate (101) is provided with a first opening (106) connecting the first limiting cavity (103) and the electrode cavity (105), and the second limiting plate (102) is provided with a second opening (107) connecting the electrode cavity (105) and the second limiting cavity (104). When the PCB board (31) is placed in the electrode cavity (105), the first protrusion (37) is located in the first limiting cavity (103), and the second protrusion (38) is located in the second limiting cavity (104); A clamping structure (4) is installed in both the first limiting cavity (103) and the second limiting cavity (104).
6. The high-voltage AC electric field energy harvesting device according to claim 5, characterized in that: The clamping structure (4) includes a pressure plate (41) and fasteners (42) spaced at both ends of the pressure plate (41), the fasteners (42) being locked inside the bottom shell (1).
7. The high-voltage AC electric field energy harvesting device according to claim 6, characterized in that: The first limiting cavity (103) and the second limiting cavity (104) are each provided with a first connecting post (108) at intervals, and the fastener (42) is locked on the first connecting post (108).
8. The high-voltage AC electric field energy harvesting device according to claim 7, characterized in that: The first limiting cavity (103) and the second limiting cavity (104) are each provided with a second connecting post (109) at intervals, and the upper cover (5) is locked on the second connecting post (109) by fasteners (42).
9. A high-voltage AC electric field energy harvesting device according to claim 8, characterized in that: The bottom shell (1) has a positioning step (110) at the opening, and the top cover (5) has a positioning protrusion (50) that cooperates with the positioning step (110). A sealing gasket is provided between the positioning step (110) and the positioning protrusion (50).