Water wave energy friction nanogenerator

Abstract

The application discloses a water wave energy friction nanogenerator, which comprises a floating part and a friction nanogenerating part in the floating part. The friction nanogenerating part comprises a shell and at least one generating unit in the shell. The generating unit comprises a base, an interdigital electrode, a friction layer and a plurality of rolling parts. The interdigital electrode is arranged on the base. The friction layer covers the interdigital electrode. The plurality of rolling parts are arranged on the side of the friction layer away from the interdigital electrode and along the arrangement direction of the plurality of electrode fingers. The number of the rolling parts is less than the number of the electrode fingers. The diameter of the rolling part is equal to the line width of the electrode finger. The plurality of rolling parts comprise n first rolling parts and n-1 second rolling parts arranged alternately. The electrical property of the first rolling part is opposite to the electrical property of the friction layer and the electrical property of the second rolling part. N is an integer greater than or equal to 2. The generator can be used for capturing reciprocating water wave energy in water wave environment such as lakes, reservoirs and oceans, and can effectively improve the output current and the availability of electric energy.

Description

Technical Field

[0001] This invention relates to the field of power generation equipment technology, and in particular to a water wave energy triboelectric nanogenerator. Background Technology

[0002] Triboelectric nanogenerators (TGNs) are a green, pollution-free, low-cost power generation technology with good low-frequency performance. They can convert low-frequency, irregular mechanical energy into electrical energy output. The development and utilization of wave-energy TGNs, in particular, has become an important technology for environmental micro-nano energy capture and a significant supplement to the field of energy harvesting. Currently, the environmental adaptability and output power availability of wave-energy TGNs are key technical challenges limiting their application in marine environments. Therefore, developing a TGN with strong wave environment adaptability and high output performance availability is highly beneficial for the design and application of TGNs. Summary of the Invention

[0003] This invention provides a water wave energy triboelectric nanogenerator, which can be used to capture reciprocating water wave energy in water wave environments such as lakes, reservoirs, and oceans, and can effectively improve the output current and power availability.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A water wave energy triboelectric nanogenerator includes a floating part and a triboelectric nanogenerator located within the floating part. The floating part is used to make the triboelectric nanogenerator float in water. The triboelectric nanogenerator includes a housing and at least one power generation unit located within the housing. The power generation unit includes a base, interdigitated electrodes, a friction layer, and multiple rolling parts.

[0006] The interdigitated electrode is disposed on the base. The interdigitated electrode includes two busbars and a plurality of electrode fingers located between the two busbars. Any two adjacent electrode fingers are connected to different busbars. The friction layer covers the interdigitated electrode and is in contact with the surface of the plurality of electrode fingers.

[0007] The plurality of rolling portions are located on the side of the friction layer away from the interdigitated electrodes and are arranged sequentially along the arrangement direction of the plurality of electrode fingers. The number of rolling portions is less than the number of electrode fingers, and the diameter of the rolling portions is equal to the line width of the electrode fingers.

[0008] The plurality of rolling parts include n first rolling parts and n-1 second rolling parts arranged in an alternating manner, where n is an integer greater than or equal to 2; the electrical properties of the first rolling parts are opposite to those of the friction layer and the second rolling parts; when the plurality of rolling parts roll along the arrangement direction of the plurality of electrodes, the first rolling parts, the friction layer, and the adjacent second rolling parts can all generate electrical charge through friction.

[0009] Optionally, the triboelectric nanogenerator includes multiple power generation units, and the busbars of the multiple power generation units are connected in parallel.

[0010] Optionally, the base includes a bottom plate and at least two side plates connected to the bottom plate, the bottom plate and the plurality of side plates cooperating to form a rolling space;

[0011] The interdigitated electrodes are attached to the inner wall of the base, the friction layer is laid on the interdigitated electrodes, and the plurality of rolling parts are located in the rolling space. The rolling parts are cylindrical or spherical.

[0012] Optionally, the base plate is flat, and the arrangement direction of the plurality of electrode fingers and the arrangement direction of the plurality of rolling parts are the same as the extension direction of the base plate.

[0013] Optionally, the rolling part is cylindrical, and the interdigitated electrode is attached to the inner wall of the base plate;

[0014] The plurality of power generation units are stacked; along the arrangement direction of the plurality of power generation units, the bottom plate of the previous power generation unit overlaps with the side plate of the next power generation unit, and the side plate of the previous power generation unit facing the next power generation unit is provided with an auxiliary interdigital electrode and an auxiliary friction layer covering the auxiliary interdigital electrode. The electrical properties of the auxiliary friction layer are opposite to those of the first rolling part, and the auxiliary friction layer on the previous power generation unit can contact the plurality of rolling parts of the next power generation unit.

[0015] Optionally, the rolling part is spherical, and the interdigitated electrode is attached to the base plate and the side plate.

[0016] Optionally, the base plate is an arc-shaped plate, and the arrangement direction of the plurality of electrode fingers and the arrangement direction of the plurality of rolling parts are the same as the bending direction of the base plate.

[0017] Optionally, the housing is cylindrical, and the housing has ports at both ends;

[0018] The base plate of the power generation unit extends in the same straight direction as the shell, and the multiple power generation units are stacked sequentially along the radial direction of the shell.

[0019] Optionally, in each of the power generation units, the base includes two side plates, which are respectively connected to two end faces of the bottom plate in the straight extension direction;

[0020] The base plate of each power generation unit overlaps with the inner wall of the housing. Along the arrangement direction of the multiple power generation units, the side plate of the base in the next power generation unit overlaps with the side plate of the previous power generation unit. The side plates of the base on the same side in the multiple power generation units can be spliced ​​together to form an end plate that overlaps with the inner wall of the cylindrical housing. The end plate is sealed to the port of the housing.

[0021] Optionally, the base plate is annular, the interdigitated electrode is disc-shaped and mates with the rolling chamber, and the rolling part is spherical;

[0022] The multiple power generation units share the same central axis and are arranged sequentially along the radial direction of the base plate.

[0023] Optionally, the base plate is arc-shaped to cooperate with the spherical rolling part.

[0024] Optionally, the floating part includes a float and a shell. The float includes a bearing surface and a plurality of wave-facing surfaces connected to the bearing surface. The shell is disposed on the bearing surface. The wave-facing surfaces are used to bear the impact of waves. The triboelectric nanogenerator is disposed inside the shell.

[0025] Optionally, the wave-facing surface is arranged perpendicular to the bearing surface, and multiple wave-facing surfaces are connected by rounded corners.

[0026] Optionally, the triboelectric nanogenerator has a detachably connected weight block, which is used to adjust the center of gravity of the water wave energy triboelectric nanogenerator.

[0027] This invention provides a water wave energy triboelectric nanogenerator, which includes a floating part and a triboelectric nanogenerator located within the floating part. The triboelectric nanogenerator includes a housing and at least one power generation unit located within the housing. The power generation unit includes a base, interdigitated electrodes on the base, a friction layer covering the interdigitated electrodes, and multiple rolling parts on the friction layer. The arrangement direction of the multiple rolling parts is the same as the arrangement direction of the multiple electrode fingers. The number of rolling parts is less than the number of electrode fingers in the interdigitated electrodes, and the diameter of the rolling parts is equal to the linewidth of the electrode fingers. When a water wave-energy triboelectric nanogenerator oscillates with the impact of waves, multiple rolling parts roll along the arrangement direction of multiple electrodes on the friction layer. Since the multiple rolling parts include n first rolling parts and n-1 second rolling parts arranged in an alternating manner, and the electrical properties of the first rolling parts are opposite to those of the second rolling parts and the friction layer, the first rolling parts and the friction layer can perform triboelectric charging to achieve electron transfer. Furthermore, the first rolling parts and adjacent second rolling parts can also perform triboelectric charging to achieve electron transfer. Compared with related technologies, the electrons transferred by triboelectric charging between the first rolling parts and adjacent second rolling parts are enhanced by increasing the total charge by increasing friction. Consequently, the induced charge of the interdigitated electrodes under the friction layer is also enhanced, and the charge difference between two adjacent interdigitated electrodes is also increased. The flow rate of the directional charge flow is also increased accordingly. Moreover, since the diameter of the rolling part is equal to the linewidth of the interdigitated electrodes, compared with related technologies, the time for the interdigitated electrodes to induce charge is shortened, reducing the charge transfer time, thereby effectively improving the generator's output current and energy availability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a power generation unit provided in related technologies;

[0029] Figure 2 A schematic diagram of the structure of a water wave energy triboelectric nanogenerator provided in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of a power generation unit provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a triboelectric nanogenerator provided in an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the structure of a power generation unit provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of another triboelectric nanogenerator provided in an embodiment of the present invention;

[0034] Figure 7A cross-sectional view of a triboelectric nanogenerator provided in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of a triboelectric nanogenerator provided in an embodiment of the present invention;

[0036] Figure 9 An exploded view of multiple power generation units provided in an embodiment of the present invention;

[0037] Figure 10 A cross-sectional view of a triboelectric nanogenerator provided in an embodiment of the present invention;

[0038] Figure 11 A schematic diagram of the structure of a power generation unit provided in an embodiment of the present invention;

[0039] Figure 12 This is a schematic diagram of another power generation unit provided in an embodiment of the present invention;

[0040] Figure 13 This is a schematic diagram of another power generation unit provided in an embodiment of the present invention;

[0041] Figure 14 A schematic planar view of another triboelectric nanogenerator provided in an embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of another triboelectric nanogenerator provided in an embodiment of the present invention.

[0043] Figure 16 A cross-sectional view of a water wave energy triboelectric nanogenerator provided in an embodiment of the present invention;

[0044] Figure 17 This is a schematic diagram of the structure of a float provided in an embodiment of the present invention.

[0045] icon:

[0046] 01-Base; 02-Interdigitated electrode; 021-Electrode finger; 03-Friction layer; 04-Rolling part;

[0047] 1-Floating part; 11-Floating body; 111-Bearing surface; 112-Wave-facing surface; 113-Mounting groove; 12-Outer shell; 121-Upper cover; 122-Lower shell; 123-Wire connection hole; 2-Triboelectric nanogenerator; 21-Shell; 22-Power generation unit; 221-Base; 2211-Bottom plate; 2212-Side plate; 222-Interdigital electrode; 222'-Auxiliary interdigital electrode; 2221-Busbar; 2222-Electrode finger; 223-Friction layer; 223'-Auxiliary friction layer; 224-First rolling part; 225-Second rolling part; 226-Wire connection hole; 227-Fixing groove. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Among related technologies, a triboelectric nanogenerator for water wave energy harvesting can, for example... Figure 1 As shown, the triboelectric nanogenerator includes a floating section and a power generation unit located on the floating section. The power generation unit may include a base 01, interdigitated electrodes 02 located on the base, a friction layer 03 covering the interdigitated electrodes, and at least one roller 04 located on the friction layer. The electrical polarity of the roller 04 is opposite to that of the friction layer 03. The diameter of the roller 04 is half the linewidth of the electrode fingers 021 of the interdigitated electrodes 02. For example, the roller may be negatively polarized, and the friction layer may be positively polarized. Figure 1 In the triboelectric nanogenerator, as it oscillates with the impact of waves, the roller 04 rolls along with the oscillation. The negatively charged roller 04 interacts with the positively charged friction layer 03 to generate electrons through triboelectric charging. The positively charged friction layer carries a positive charge, and due to the movement of the negatively charged roller, it combines with the charge on the positively charged friction layer 03. This alters the induced charge on the interdigitated electrodes beneath the positively charged friction layer. The difference in charge between adjacent interdigitated electrodes creates a directional flow of charge, thereby achieving electrical energy output. The triboelectric nanogenerator exhibits low-current, high-voltage output characteristics. Its output current is crucial to the generator's usability, and the increase in output current depends on the magnitude of the charge and the duration of charge transfer. Figure 1 The current output of the triboelectric nanogenerator is relatively low, and the availability of the output power needs to be improved.

[0050] To address the aforementioned technical problems, this invention provides a water wave energy triboelectric nanogenerator, such as... Figures 2-16 As shown, it includes a floating part 1 and a triboelectric nanogenerator 2 located within the floating part 1. The floating part 1 is used to make the triboelectric nanogenerator 2 float in water. The triboelectric nanogenerator 2 includes a housing 21 and at least one power generation unit 22 located within the housing 21. The power generation unit 22 includes a base 221, interdigitated electrodes 222, a friction layer 223, and a plurality of rolling parts.

[0051] The interdigitated electrode 222 is disposed on the base 221. The interdigitated electrode 222 includes two busbars 2221 and multiple electrode fingers 2222 located between the two busbars 2221. Any two adjacent electrode fingers 2222 are connected to different busbars 2221. The friction layer 223 covers the interdigitated electrode 222 and is in contact with the surface of the multiple electrode fingers.

[0052] Multiple rolling parts are located on the side of the friction layer 223 away from the interdigitated electrode 222 and are arranged sequentially along the arrangement direction of the multiple electrode fingers. The number of rolling parts is less than the number of electrode fingers 2222, and the diameter of the rolling parts is equal to the line width of the electrode fingers 2222.

[0053] The multiple rolling parts include n first rolling parts 224 and n-1 second rolling parts 225 arranged in an alternating manner, where n is an integer greater than or equal to 2; the electrical properties of the first rolling parts 224 are opposite to those of the friction layer 223 and the second rolling parts 225. When the multiple rolling parts roll along the arrangement direction of the multiple electrode fingers 2222, the first rolling parts 224, the friction layer 223, and the adjacent second rolling parts 225 can all generate electrical charge through friction.

[0054] The water wave energy triboelectric nanogenerator provided in this embodiment of the invention includes a floating part 1 and a triboelectric nanogenerator 2 located within the floating part 1. The triboelectric nanogenerator 2 includes a housing 21 and at least one power generation unit 22 located within the housing 21. The power generation unit 22 includes a base 221, interdigitated electrodes 222 located on the base 221, a friction layer 223 covering the interdigitated electrodes 222, and a plurality of rolling parts located on the friction layer 223. The arrangement direction of the plurality of rolling parts is the same as the arrangement direction of the plurality of electrode fingers. The number of rolling parts is less than the number of electrode fingers 2222 in the interdigitated electrodes 222, and the diameter of the rolling parts is equal to the line width of the electrode fingers 2222. When the water wave triboelectric nanogenerator oscillates with the impact of waves, multiple rolling parts roll along the arrangement direction of multiple electrodes on the friction layer 223. Since the multiple rolling parts include n staggered first rolling parts 224 and n-1 second rolling parts 225, and the electrical properties of the first rolling parts 224 are opposite to those of the second rolling parts 225 and the friction layer 223, the first rolling parts 224 and the friction layer 223 can undergo triboelectric charging to achieve electron transfer. Furthermore, the first rolling parts 224 and adjacent second rolling parts 225 also undergo triboelectric charging to achieve electron transfer. Compared with related technologies, the first rolling parts and adjacent second rolling parts 225... The electrons transferred by triboelectric charging increase the total charge by increasing friction, which in turn increases the induced charge on the interdigital fingers 2222 of the triboelectric layer 223. The charge difference between two adjacent interdigital fingers 2222 of the interdigital electrode 222 also increases, and the flow rate of the directional charge flow also increases. Furthermore, since the diameter of the rolling part is equal to the line width of the interdigital fingers 2222 of the interdigital electrode 222, compared with related technologies, the time for the interdigital fingers 2222 to induce charge is shortened, the charge transfer time is reduced, and the output current and power availability of the generator can be effectively improved.

[0055] Specifically, the electrical properties of the first rolling part can be negative. The first rolling part acts as a triboelectric medium, and its main function is to rub against the friction layer to generate electrical differences and realize charge transfer.

[0056] The electrical properties of the second rolling part and the friction can be positive. The main function of the second rolling part is to separate the two first rolling parts and reduce the charge cancellation effect between the two adjacent interdigital electrodes. The friction between the second rolling part and the first rolling part can increase the transferable charge and improve the total charge of the water wave energy triboelectric nanogenerator.

[0057] The smaller the spacing between adjacent fingers in an interdigitated electrode, the narrower the linewidth of a single finger, the more rolling parts there are, the shorter the charge transfer time, and the greater the current boost.

[0058] Specifically, the interdigitated electrodes 222 can be bonded to the base 221 with adhesive. The materials of the interdigitated electrodes 222 can be positively conductive materials such as copper and aluminum, participating in inductive conduction. The friction layer 223 can be made of materials such as nylon, polyoxymethylene, and polyamide, serving as a positive dielectric material to participate in the loss of charge through friction. The first rolling part 224 can be made of electronegative polymer materials such as polytetrafluoroethylene, polyethylene, polypropylene, and polyimide. The second rolling part 225 can be made of positively conductive polymer materials such as nylon, polyoxymethylene, and polyamide, or positively conductive materials such as copper and aluminum. The above-mentioned water wave energy triboelectric nanogenerator has a wide range of material selection for its components, offering advantages such as broad application scenarios and low manufacturing costs, which can accelerate the practical application and commercialization of water wave energy triboelectric nanogenerators.

[0059] Specifically, such as Figure 4 As shown, the above-mentioned triboelectric nanogenerator may include multiple power generation units 22, and the busbars of the multiple power generation units 22 may be connected in parallel, which can effectively improve the availability of the output current of the water wave energy triboelectric nanogenerator.

[0060] In embodiments of the present invention, such as Figure 4 and Figure 5 As shown, in each power generation unit 22, the base 221 may include a bottom plate 2211 and at least two side plates 2212 connected to the bottom plate 2211. The bottom plate 2211 and the multiple side plates 2212 cooperate to form a rolling space. The interdigitated electrode 222 may be attached to the inner wall of the base 221, and the friction layer 223 is laid on the interdigitated electrode 222. Multiple rolling parts are located in the rolling space, and the rolling parts may be cylindrical or spherical.

[0061] Specifically, such as Figures 4 to 7 As shown, the base plate 2211 can be flat, and the arrangement direction of the multiple electrode fingers 2222 and the arrangement direction of the multiple rolling parts are the same as the extension direction of the base plate.

[0062] Optionally, such as Figure 5 As shown, the aforementioned rolling part can be cylindrical, and the interdigitated electrodes 222 can be attached to the inner wall of the base plate 2211; multiple power generation units 22 are stacked; as shown Figure 4As shown, along the arrangement direction of the multiple power generation units 22, the base plate 2211 of the preceding power generation unit can overlap with the side plate 2212 of the following power generation unit. The side plate 2212 of the preceding power generation unit facing the following power generation unit can be provided with an auxiliary interdigital electrode 222' and an auxiliary friction layer 223' covering the auxiliary interdigital electrode 222'. The electrical properties of the auxiliary friction layer 223' are opposite to those of the first rolling part 224. The auxiliary friction layer on the preceding power generation unit can contact multiple rolling parts of the following power generation unit. By providing the auxiliary interdigital electrode and the auxiliary friction layer, triboelectric charging can be achieved on both sides of the cylindrical rolling part. The busbar of the auxiliary interdigital electrode can be connected in parallel with other busbars, effectively improving the generator's output current and power availability.

[0063] Optionally, such as Figure 6 and Figure 7 As shown, the rolling part can also be spherical. The interdigitated electrodes 222 can be attached to the base plate and side plate, and the friction layer 223 covers the interdigitated electrodes 222. When the rolling part rolls, it can increase the contact area between the surface of the rolling part and the friction layer 223, which can effectively improve the generator's output current and power availability. For example, as... Figure 6 As shown, the aforementioned multiple power generation units 22 can be arranged side by side, and the base plates and side plates of two adjacent power generation units 22 can be connected; or, as shown... Figure 7 As shown, the above-mentioned multiple power generation units can be stacked. Along the arrangement direction of the multiple power generation units 22, the side plate 2212 of the base 221 in the later power generation unit is engaged with the side plate 2212 of the previous power generation unit.

[0064] In embodiments of the present invention, such as Figures 8 to 10 As shown, in the above-mentioned power generation unit, the base plate 2211 can also be an arc-shaped plate, and the arrangement direction of the multiple electrode fingers 2222 and the arrangement direction of the multiple rolling parts are the same as the bending direction of the base plate 2211. When the water wave triboelectric nanogenerator oscillates with the waves, the arc-shaped base plate 2211 of the base 221 of the power generation unit 22 can more easily make the multiple rolling parts roll within the rolling space of the base 221, thereby reducing the starting torque of the water wave triboelectric nanogenerator, enhancing the wave adaptability of the water wave triboelectric nanogenerator, and making it applicable to applications with low-amplitude, micro-movement waves. The water wave triboelectric nanogenerator provided in this embodiment of the invention has broad application prospects in micro-nano energy capture, especially in the field of blue ocean energy harvesting.

[0065] Specifically, such as Figure 8As shown, the aforementioned housing 21 can be cylindrical, with ports at both ends. The arc-shaped base plate 2211 of the power generation unit 22 extends in the same direction as the housing 21, and multiple power generation units 22 are stacked sequentially along the radial direction of the housing 21. The multiple power generation units 22 in the water wave triboelectric nanogenerator adopt an independently layered configuration. When the water wave triboelectric nanogenerator oscillates with the waves, multiple power generation units 22 can generate electricity together, effectively improving the availability of the output current of the water wave triboelectric nanogenerator.

[0066] Specifically, such as Figures 10 to 13 As shown, in each power generation unit 22, the base 221 includes two side plates 2212, which can be connected to the two end faces of the bottom plate 2211 in the straight extension direction respectively; the bottom plate 2212 of the base in each power generation unit 22 overlaps with the inner wall of the shell 21. Along the arrangement direction of multiple power generation units 22, the side plate of the base in the later power generation unit overlaps with the side plate of the previous power generation unit; the side plates on the same side of the base in multiple power generation units 22 can be spliced ​​together to form an end plate that overlaps with the inner wall of the cylindrical shell 21. The end plate is sealed with the port of the shell, which can protect the power generation unit 22 and prevent damage to the internal components of the friction nano-power generation part 2.

[0067] For example, such as Figure 10 As shown, the number of power generation units can be 6, and the schematic diagram shows the structure of 6 power generation units 22 assembled into the housing 21; wherein, the first power generation unit ( Figure 10 The structure of the uppermost power generation unit 22) can be as follows: Figure 11 As shown, the side surface of the base plate 2211 and the upper surface of the side plate 2212 of the power generation unit 22 both overlap with the inner wall of the housing 21; while the power generation unit located in the middle (e.g., Figure 10 The structure of the second power generation unit 22) can be as follows: Figure 12 As shown, the side of the base plate 2211 of the power generation unit 22 overlaps with the inner wall of the housing 21, and the upper surface of the side plate 2212 overlaps with the previous power generation unit 22; while the structure of the last light-emitting unit can be as follows: Figure 13 As shown, the bottom surface of the base plate 2211 of the power generation unit 22 overlaps with the inner wall of the housing 21, and the upper surface of the side plate 2212 overlaps with the previous power generation unit 22.

[0068] Among them, such as Figure 8 As shown, the end plate formed by splicing the side plates 2212 is sealed to the port of the housing 21 by the sealing ring 23, which can prevent water from entering the interior of the friction nano-power generation unit 2, avoid damage, and increase service life.

[0069] In embodiments of the present invention, such as Figure 14 and Figure 15As shown, the base plate 2211 can also be annular, the interdigitated electrode 22 is disc-shaped and mates with the rolling chamber, the central axis of the interdigitated electrode coincides with the central axis of the base plate, and the rolling part can be spherical; the central axes of the multiple power generation units 22 are the same, and the multiple power generation units are arranged sequentially along the radial direction of the base plate. The annular base 221 makes it easier for the multiple rolling parts to roll within the rolling space of the base, thereby reducing the starting torque of the water wave energy friction nanogenerator, enhancing the wave adaptability of the water wave energy friction nanogenerator, and making it applicable to applications with low-amplitude, micro-movement waves.

[0070] Specifically, such as Figure 15 As shown, the base plate 2211 can be an arc shape that matches the spherical rolling part, making it easier for the rolling part to roll when impacted, thereby reducing the starting torque of the water wave energy friction nanogenerator.

[0071] Specifically, such as Figure 15 As shown, the interdigitated electrode 222 can be attached to the inner wall of the base plate 2211 and the side plate 2212 of the base 221, and the friction layer 223 can cover the interdigitated electrode 222, which can increase the contact area between the rolling part and the friction layer 223, and effectively improve the output current and power availability of the generator.

[0072] In this embodiment of the invention, the two busbars 2221 of each power generation unit 22 can serve as the positive and negative terminals of the power generation unit 22, respectively. The positive and negative terminals of multiple power generation units 22 are connected to a rectifier bridge and then connected in parallel for output. Through the combination of multiple power generation units 22, multiple power generation units 22 can be connected in parallel using multiple connecting wires, for example... Figure 5 and Figure 11 As shown, the side plate 2212 of the base 221 can be provided with a wire connection hole 226. The connecting wire can pass through the wire connection hole 226 into the power generation unit 22 and connect to the bus bar 2221. The structure is simple and easy to manufacture.

[0073] Specifically, the number of power generation units 22 in the aforementioned triboelectric nano-power generation section 2 is not limited here and can be determined according to the actual situation, for example, such as Figures 8 to 10 As shown, the triboelectric nanogenerator 2 can be equipped with 6 power generation units 22.

[0074] Furthermore, the number of electrode fingers 2222 of the interdigitated electrodes 222 in each power generation unit 22 can be determined according to actual conditions, as can the line width of the electrode fingers 2222 and the spacing between two electrode fingers 2222. The number of rolling parts can also be determined according to actual conditions, for example, such as... Figure 10As shown, along the arrangement direction of the multiple power generation units 22, due to the different dimensions of the base 221 of the power generation units 22, the number of rolling parts in the first to third power generation units 22 can be three, including two first rolling parts 224 and two rolling parts 225, while the number of rolling parts in the fourth to sixth power generation units 22 can be five, including three first rolling parts 224 and two second rolling parts 225. Optionally, the width of the multiple rolling parts in the power generation unit 22 arranged side by side can be less than or equal to half the width of the base plate 2211, which can provide sufficient space for the rolling parts to roll.

[0075] In embodiments of the present invention, such as Figure 2 and Figure 16 As shown, the floating part 1 may include a float 11 and a shell 12. The float 11 includes a bearing surface 111 and multiple wave-facing surfaces 112 connected to the bearing surface 111. The shell 12 is disposed on the bearing surface 111. The wave-facing surfaces 112 are used to withstand the impact of waves. The triboelectric nanogenerator 2 is disposed inside the shell 12. When the water wave energy triboelectric nanogenerator is placed in a wave environment, the wave-facing surfaces 112 on the float 11 can withstand the wave force of the water waves, causing the generator to sway left and right. This causes multiple rolling parts in the generator to roll left and right, causing the friction layers 223 of the multiple rolling parts to rub against each other. The interdigitated electrodes 222 induce opposite charges to generate electricity.

[0076] Specifically, such as Figure 17 As shown, the wave-facing surface 112 and the bearing surface 111 can be set perpendicularly, and multiple wave-facing surfaces 112 can be connected by rounded corners, which is beneficial for the wave-facing surface 112 to withstand the wave force of the water wave.

[0077] Specifically, the bearing surface 111 of the aforementioned float 11 may have a mounting groove 113, and the outer shell 12 may be partially embedded in the mounting groove 113 of the bearing surface 111, so that the connection between the outer shell 12 and the float 11 is tight and reliably fixed. The outer shell 12 may consist of an upper cover 121 and a lower shell 122. The lower shell 122 may be embedded in the mounting groove 113, and the upper cover 121 may be sealed to the lower shell 122 to prevent water from entering the outer shell 12. The upper cover 121 may have two wire connection holes 123, facilitating the passage of wires through the outer shell 12 into the generator unit 22 to connect with the busbar 2221.

[0078] In this embodiment of the invention, the triboelectric nanogenerator 2 may have a detachably connected weight block, which is used to adjust the center of gravity of the water wave energy triboelectric nanogenerator. The center of gravity of the water wave energy triboelectric nanogenerator can be directly adjusted via the weight block, thereby adjusting the adaptability of the water wave energy triboelectric nanogenerator. Specifically, the weight of the weight block is not limited here and depends on the actual situation. The weight block can also be replaced according to the actual situation to facilitate power generation.

[0079] For example, such as Figure 10 and Figure 13 As shown, along the arrangement direction of the multiple power generation units 22, the base plate 2211 of the base 221 in the last power generation unit 22 has multiple fixing slots 227, and the weight block can be detachably connected to the fixing slots 227. For example, as Figure 13 As shown, in the last power generation unit 22, there are three evenly distributed fixing slots 227 in the middle of the base plate 2211 for assembling heavy blocks.

[0080] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A water wave energy triboelectric nanogenerator, characterized in that, It includes a floating part and a triboelectric nanogenerator located within the floating part. The floating part is used to make the triboelectric nanogenerator float in water. The triboelectric nanogenerator includes a housing and at least one power generation unit located within the housing. The power generation unit includes a base, interdigitated electrodes, a friction layer, and multiple rolling parts. The interdigitated electrode is disposed on the base. The interdigitated electrode includes two busbars and a plurality of electrode fingers located between the two busbars. Any two adjacent electrode fingers are connected to different busbars. The friction layer covers the interdigitated electrode and is in contact with the surface of the plurality of electrode fingers. The plurality of rolling portions are located on the side of the friction layer away from the interdigitated electrodes and are arranged sequentially along the arrangement direction of the plurality of electrode fingers. The number of rolling portions is less than the number of electrode fingers, and the diameter of the rolling portions is equal to the line width of the electrode fingers. The plurality of rolling parts include n first rolling parts and n-1 second rolling parts arranged in an alternating manner, where n is an integer greater than or equal to 2; the electrical properties of the first rolling parts are opposite to those of the friction layer and the second rolling parts; when the plurality of rolling parts roll along the arrangement direction of the plurality of electrodes, the first rolling parts, the friction layer, and the adjacent second rolling parts can all generate electrical charge through friction.

2. The water wave energy triboelectric nanogenerator according to claim 1, characterized in that, The triboelectric nanogenerator includes multiple power generation units, and the busbars of the multiple power generation units are connected in parallel.

3. The water wave energy triboelectric nanogenerator according to claim 2, characterized in that, The base includes a bottom plate and at least two side plates connected to the bottom plate, the bottom plate and the multiple side plates cooperating to form a rolling space; The interdigitated electrodes are attached to the inner wall of the base, the friction layer is laid on the interdigitated electrodes, and the plurality of rolling parts are located in the rolling space. The rolling parts are cylindrical or spherical.

4. The water wave energy triboelectric nanogenerator according to claim 3, characterized in that, The base plate is flat, and the arrangement direction of the plurality of electrode fingers and the arrangement direction of the plurality of rolling parts are the same as the extension direction of the base plate.

5. The water wave energy triboelectric nanogenerator according to claim 4, characterized in that, The rolling part is cylindrical, and the interdigitated electrode is attached to the inner wall of the base plate; The plurality of power generation units are stacked; along the arrangement direction of the plurality of power generation units, the bottom plate of the previous power generation unit overlaps with the side plate of the next power generation unit, and the side plate of the previous power generation unit facing the next power generation unit is provided with an auxiliary interdigital electrode and an auxiliary friction layer covering the auxiliary interdigital electrode. The electrical properties of the auxiliary friction layer are opposite to those of the first rolling part, and the auxiliary friction layer on the previous power generation unit can contact the plurality of rolling parts of the next power generation unit.

6. The water wave energy triboelectric nanogenerator according to claim 4, characterized in that, The rolling part is spherical, and the interdigitated electrodes are attached to the base plate and the side plate.

7. The water wave energy triboelectric nanogenerator according to claim 3, characterized in that, The base plate is arc-shaped, and the arrangement direction of the plurality of electrode fingers and the arrangement direction of the plurality of rolling parts are the same as the bending direction of the base plate.

8. The water wave energy triboelectric nanogenerator according to claim 7, characterized in that, The housing is cylindrical, and has ports at both ends; The base plate of the power generation unit extends in the same straight direction as the shell, and the multiple power generation units are stacked sequentially along the radial direction of the shell.

9. The water wave energy triboelectric nanogenerator according to claim 8, characterized in that, In each of the power generation units, the base includes two side plates, which are respectively connected to two end faces of the bottom plate in the straight extension direction; The base plate of each power generation unit overlaps with the inner wall of the housing. Along the arrangement direction of the multiple power generation units, the side plate of the base in the next power generation unit overlaps with the side plate of the previous power generation unit. The side plates of the base on the same side in the multiple power generation units can be spliced ​​together to form an end plate that overlaps with the inner wall of the cylindrical housing. The end plate is sealed to the port of the housing.

10. The water wave energy triboelectric nanogenerator according to claim 3, characterized in that, The base plate is annular, the interdigitated electrode is disc-shaped and cooperates with the rolling space, and the rolling part is spherical; The multiple power generation units share the same central axis and are arranged sequentially along the radial direction of the base plate.

11. The water wave energy triboelectric nanogenerator according to claim 10, characterized in that, The base plate is arc-shaped to cooperate with the spherical rolling part.

12. The water wave energy triboelectric nanogenerator according to any one of claims 1-11, characterized in that, The floating part includes a float and a shell. The float includes a bearing surface and a plurality of wave-facing surfaces connected to the bearing surface. The shell is disposed on the bearing surface. The wave-facing surfaces are used to bear the impact of waves. The triboelectric nanogenerator is disposed inside the shell.

13. The water wave energy triboelectric nanogenerator according to claim 12, characterized in that, The wave-facing surface is perpendicular to the bearing surface, and multiple wave-facing surfaces are connected by rounded corners.

14. The water wave energy triboelectric nanogenerator according to claim 12, characterized in that, The triboelectric nanogenerator has a detachably connected weight block, which is used to adjust the center of gravity of the water wave energy triboelectric nanogenerator.

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