Wind power generation apparatus and energy storage system

Abstract

The present application relates to a wind power generation apparatus and an energy storage system. The wind power generation apparatus comprises: a first blade and a second blade; the first blade and the second blade being arranged at two ends of a first shaft, and the first blade and the second blade being capable of rotating about the first shaft; a second shaft, arranged perpendicular to the first shaft; an input end of a generator being connected to the second shaft; and a power transmission mechanism having one end connected to the first shaft, and the other end connected to the second shaft. In direction X of the first shaft, the width of the second blade is increased by Δk relative to the width of the first blade, or in direction Y of the second shaft, the length of the second blade is increased by Δh relative to the length of the first blade. By widening or lengthening one of the two blades, an asymmetric blade structure design is formed, and the inherent deflection torque of the first and second shafts during transmission can be effectively counteracted, ensuring stable operation of the wind power generation apparatus.

Description

Wind power generation device and energy storage system

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410541695.8, filed on April 30, 2024, and entitled "Wind power generation device and energy storage system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] Embodiments of the present application relate to the technical field of energy storage. BACKGROUND

[0004] A wind power generation device is a device that converts wind energy into electrical energy. It uses wind to push the blades to rotate, and then drives the generator to rotate to generate electricity through electromagnetic induction principle. Wind power generation devices can be divided into small wind power generation devices and large commercial wind power generation devices according to size and purpose. The latter is usually installed in a wind power plant. Among them, the former small wind power generation device can be used in various scenarios, individual users can purchase and install it by themselves, and the cost is relatively low, which can be built into an off-grid energy system. The existing roller type wind power generation device has small size, high wind energy utilization efficiency at low wind speed.

[0005] In the process of implementing the present application, the applicant found that: at present, the roller type wind power generation device has the advantages of small size, high wind energy utilization efficiency at low wind speed, etc. However, the power of the roller type wind power generation device is transmitted to the generator through the horizontal shaft to the vertical shaft. When loaded, the whole has an inherent deflection force. Even with a yaw rudder, it will be in left and right swing oscillation, which reduces the overall wind catching performance and mechanical durability of the wind power generation device.

[0006] SUMMARY

[0007] In view of the above problems, the embodiments of the present application provide a wind power generation device and an energy storage system, which overcome the above problems or at least partially solve the problem that the roller type wind power generation device has an inherent deflection force when the power is transmitted to the generator through the horizontal shaft to the vertical shaft, which causes the whole wind power generation device to be in left and right swing oscillation, reducing the overall wind catching performance and mechanical durability of the wind power generation device.

[0008] According to an aspect of the embodiments of the present application, a wind power generation device is provided, comprising: a first blade and a second blade; a first shaft, the first blade and the second blade being arranged at two ends of the first shaft, the first blade being rotatable around the first shaft, and the second blade being rotatable around the first shaft; a second shaft, the second shaft being arranged perpendicularly to the first shaft; a generator, an input end of the generator being connected to the second shaft; a power transmission mechanism, one end of the power transmission mechanism being connected to the first shaft, and the other end of the power transmission mechanism being connected to the second shaft, the power transmission mechanism being configured to transmit wind energy captured by the first blade and / or the second blade from the first shaft to the second shaft, so as to drive the generator to generate electricity; wherein, along a direction X in which the first shaft is arranged, the width of the second blade is increased by Δk relative to the width of the first blade, along a direction Y in which the second shaft is arranged, the length of the first blade is the same as the length of the second blade, or, along the direction Y in which the second shaft is arranged, the length of the second blade is increased by Δ relative to the length of the first blade, along the direction X in which the first shaft is arranged, the width of the first blade is the same as the width of the second blade.

[0009] In an optional mode,

[0010] wherein, the L is a distance from the first blade to a center of the second shaft along the direction X; the W is a half of the width of the first blade along the direction X; the R is a force arm of wind force received by the first blade along the direction Y; and the k is the width of the first blade along the direction X.

[0011] In an optional mode,

[0012] the Δ is positive, wherein the L is a distance from the first blade to a center of the second shaft along the direction X; the R is a force arm of wind force received by the first blade along the direction Y; and the L is the length of the first blade along the direction Y.

[0013] In an optional mode, the wind power generation device further comprises a first spoke and a first hub, the first hub being rotatably connected to the first shaft, one end of the first spoke being connected to the first hub, and the other end of the first spoke being connected to the first blade.

[0014] In an optional mode, the number of the first blades is plural, the number of the first spokes is plural, and one first blade is connected to one first spoke.

[0015] In an alternative way, the wind power generation device further comprises a second spoke and a second hub, the second hub is rotatably connected with the first shaft, one end of the second spoke is connected with the second hub, and the other end of the second spoke is connected with the second blade.

[0016] In an alternative way, the number of the second blades is multiple, the number of the second spokes is multiple, and one second blade is connected with one second spoke; the number of the second blades is the same as the number of the first blades.

[0017] In an alternative way, the power transmission mechanism comprises a first bevel gear and a second bevel gear, the first shaft is connected with the first bevel gear, the first bevel gear is engaged with the second bevel gear, and the second bevel gear is connected with the second shaft.

[0018] In an alternative way, the wind power generation device further comprises a first frame and a second frame, the first frame is arranged outside the first blade, and the second frame is arranged outside the second blade.

[0019] According to another aspect of the embodiments of the present application, there is provided an energy storage system, comprising the wind power generation device, an energy storage system controller mainboard, an AC-DC converter, a filter, a step-up / down converter, a first relay, a battery pack, a second relay and an inverter; the wind power generation device is connected with the AC-DC converter, the filter is connected with the step-up / down converter, the step-up / down converter is connected with the energy storage system controller mainboard, the step-up / down converter is connected with the first relay, the first relay is connected with the energy storage system controller mainboard, the first relay is connected with the battery pack, the battery pack is connected with the second relay, the second relay is connected with the energy storage system controller mainboard, the second relay is connected with the inverter, and the inverter is used for supplying power to an AC load and a DC load.

[0020] The beneficial effects of the embodiments of the present application include: providing a wind power generation device, comprising a first blade and a second blade; a first shaft, the first blade and the second blade are arranged at two ends of the first shaft, the first blade can rotate around the first shaft, and the second blade can rotate around the first shaft; a second shaft, which is arranged perpendicularly to the first shaft; a generator, an input end of the generator is connected with the second shaft; a power transmission mechanism, one end of the power transmission mechanism is connected with the first shaft, and the other end of the power transmission mechanism is connected with the second shaft, and the power transmission mechanism is used for transmitting wind energy captured by the first blade and / or the second blade from the first shaft to the second shaft to drive the generator to generate electricity; wherein, along the direction X in which the first shaft is located, the width of the second blade is increased by Δk relative to the width of the first blade, along the direction Y in which the second shaft is located, the length of the first blade is the same as the length of the second blade, or, along the direction Y in which the second shaft is located, the length of the second blade is increased by Δ relative to the length of the first blade, and along the direction X in which the first shaft is located, the width of the first blade is the same as the width of the second blade. By widening or lengthening one side of the blade, an asymmetric blade structure design is formed, which can effectively offset the inherent deflection torque of the first shaft and the second shaft during transmission, reduce or even eliminate the oscillation of the wind power generation device during operation without changing other original designs of the wind power generation device, and ensure the stable operation of the wind power generation device. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0022] FIG. 1 is a schematic diagram of one implementation of the wind power generation device provided by the embodiments of the present application;

[0023] FIG. 2 is a schematic diagram of another implementation of the wind power generation device provided by the embodiments of the present application;

[0024] FIG. 3 is an exploded schematic diagram of the wind power generation device provided by the embodiments of the present application;

[0025] FIG. 4 is an enlarged schematic diagram of part A in FIG. 3 provided by the embodiments of the present application;

[0026] FIG. 5 is a schematic diagram of an energy storage system provided by the embodiments of the present application.

[0027] The reference signs are: wind power generation device 2; first blade 201, second blade 202, first shaft 203, second shaft 204, generator 205, power transmission mechanism 206, first spoke 207, first hub 208, second spoke 209, second hub 210, first frame 211, second frame 212 and base 213; first bevel gear 2061, second bevel gear 2062, gear box 2063; bearing 214, neck shaft 215, bearing seat 216, shaft coupling 217, column base 218. Energy storage system 100; energy storage system controller mainboard 1, AC-DC rectifier 3, filter 4, voltage converter 5, first relay 6, battery pack 7, second relay 8, inverter 9, AC load 10, DC load 11 and display board 12. DETAILED DESCRIPTION

[0028] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal" and the like used in the present specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0029] Unless otherwise defined, all technical and scientific terms used in the present specification have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0030] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0031] Referring to FIG. 1, FIG. 2 and FIG. 3, the wind power generation device 2 comprises a first blade 201, a second blade 202, a first shaft 203, a second shaft 204, a generator 205, a power transmission mechanism 206, a first spoke 207, a first hub 208, a second spoke 209, a second hub 210, a first frame 211, a second frame 212 and a base 213. The first blade 201 is connected to the first hub 208 through the first spoke 207, and the first hub 208 is connected to the first shaft 203. The first blade 201 can rotate around the first shaft 203. The second blade 202 is connected to the second hub 210 through the second spoke 209, and the second hub 210 is connected to the first shaft 203. The second blade 202 can rotate around the first shaft 203. The input end of the generator 205 is connected to the second shaft 204. The second shaft 204 is perpendicular to the first shaft 203, and the second shaft 204 is connected to the first shaft 203 through the power transmission mechanism 206, so as to transmit the wind energy captured by the first blade 201 and / or the second blade 202 from the first shaft 203 to the second shaft 204, and drive the generator 205 to generate electricity. Through the above wind power generation device 2, the wind energy can be converted into electrical energy, so as to supply power to an AC load or a DC load.

[0032] In the embodiment of the present application, the first blade 201 and the second blade 202 are asymmetrically arranged. In the direction X along which the first shaft 203 is located, the width of the second blade 202 is increased by Δk relative to the width of the first blade 201. In the direction Y along which the second shaft 204 is located, the length of the first blade 201 is the same as the length of the second blade 202, or in the direction Y along which the second shaft 204 is located, the length of the second blade 202 is increased by Δ relative to the length of the first blade 201. In the direction X along which the first shaft 203 is located, the width of the first blade 201 is the same as the width of the second blade 202. Through the above arrangement, the blade with one side widened or lengthened forms an asymmetric blade structure design, which can effectively offset the inherent deflection torque of the first shaft 203 and the second shaft 204 during transmission, reduce or even eliminate the oscillation of the wind power generation device 2 during operation, and ensure the stable operation of the wind power generation device 2.

[0033] It is worth noting that in some embodiments, the first spoke 207, the first hub 208, the second spoke 209, the second hub 210, the first frame 211, the second frame 212 and the base 213 can not be arranged, and the functions of converting wind energy into electrical energy and ensuring the stable operation of the wind power generation device 2 can be realized.

[0034] For the first blade 201, the first spoke 207, the first hub 208 and the first shaft 203, the two ends of the first spoke 207 are connected to the first blade 201 and the first hub 208 respectively, and the first hub 208 is rotationally connected to the first shaft 203, so that when the first blade 201 rotates to capture wind energy, the first hub 208 rotates and drives the first shaft 203 to rotate, thereby transmitting power to the second shaft 204 for the generator 205 to generate electricity.

[0035] It is worth noting that in some embodiments, the first spoke 207 and the first hub 208 are designed in one piece.

[0036] In some embodiments, the number of first blades 201 is multiple, the number of first spokes 207 is multiple, and one first blade 201 is connected to one first spoke 207. By designing multiple first blades 201, the wind energy capturing capacity of the first blades 201 can be increased, thereby improving the efficiency of the wind power generation device 2.

[0037] For the second blade 202, the second spoke 209, the second hub 210 and the first shaft 203, the two ends of the second spoke 209 are connected to the second blade 202 and the second hub 210 respectively, and the second hub 210 is rotationally connected to the first shaft 203, so that when the second blade 202 rotates to capture wind energy, the second hub 210 rotates and drives the first shaft 203 to rotate, thereby transmitting power to the second shaft 204 for the generator 205 to generate electricity.

[0038] It is worth noting that in some embodiments, the second spoke 209 and the second hub 210 are designed in one piece.

[0039] In some embodiments, the number of second blades 202 is multiple, the number of second spokes 209 is multiple, and one second blade 202 is connected to one second spoke 209. By designing multiple second blades 202, the wind energy capturing capacity of the second blades 202 can be increased, thereby improving the efficiency of the wind power generation device 2.

[0040] For the first blade 201 and the second blade 202, in some embodiments, the number of second blades 202 is the same as the number of first blades 201.

[0041] For the first frame 211, the first frame 211 is arranged outside the first blade 201, so that when the first blade 201 captures wind energy, the first frame 211 arranged outside the first blade 201 can reduce the escape of the wind energy and maintain the stress of the first blade 201.

[0042] In some embodiments, as viewed along the direction X in which the first axis 203 is located, the first frame 211 is 3 / 4 circular, leaving a 1 / 4 circular position as an air inlet for wind energy to act on the first blade 201.

[0043] For the second frame 212 described above, the second frame 212 is arranged outside the second blade 202, so that after the second blade 202 captures wind energy, by arranging the second frame 212 outside the second blade 202, the escape of the wind energy can be reduced, and the force acting on the second blade 202 can be maintained.

[0044] In some embodiments, as viewed along the direction X in which the second axis 204 is located, the second frame 212 is 3 / 4 circular, leaving a 1 / 4 circular position as an air inlet for wind energy to act on the second blade 202.

[0045] For the first axis 203 and the second axis 204 described above, the first axis 203 and the second axis 204 are arranged perpendicularly. The two ends of the first axis 203 are respectively connected to the first blade 201 and the second blade 202, the first blade 201 can rotate around the first axis 203, and the second blade 202 can rotate around the first axis 203. When wind energy acts on the first blade 201 and the second blade 202, the first blade 201 and the second blade 202 can rotate around the first axis 203.

[0046] For the generator 205 described above, the input end of the generator 205 is connected to the second axis 204, so that when the second axis 204 rotates, the generator 205 can generate electricity.

[0047] The specific principle of electricity generation of the generator 205 is that the rotating second axis 204 drives the magnetic field to rotate, and an electric current is generated in the stator through electromagnetic induction principle. This current is adjusted and converted, and finally converted into usable electric energy.

[0048] It is worth noting that in some embodiments, the wind power generation device 2 further comprises a base 213, the generator 205 is arranged on the base 213, and the base 213 is used to carry the generator 205, the second axis 204, the power transmission mechanism 206, the first axis 203, the first blade 201 and the second blade 202, etc. The base 213 can also be used for connecting the wind power generation device 2 with external equipment.

[0049] It should be noted that in some embodiments, a plurality of bearings 214, neck shafts 215, bearing seats 216, shaft couplings 217, column bases 218, etc. are arranged between the generator 205 and the second shaft 204, so as to achieve better transmission between the second shaft 204 and the generator 205. The connection between the bearings 214, neck shafts 215, bearing seats 216, shaft couplings 217, column bases 218, etc. and the second shaft 204 can adopt conventional designs in the mechanical field, which will not be described herein.

[0050] For the power transmission mechanism 206, please refer to FIG. 3. One end of the power transmission mechanism 206 is connected with the first shaft 203, and the other end of the power transmission mechanism 206 is connected with the second shaft 204. The power transmission mechanism 206 is used to transmit the wind energy captured by the first blade 201 and / or the second blade 202 from the first shaft 203 to the second shaft 204, so as to drive the generator 205 to generate electricity.

[0051] In some embodiments, please refer to FIG. 3 and FIG. 4. The power transmission mechanism 206 includes a first bevel gear 2061 and a second bevel gear 2062. The first shaft 203 is connected with the first bevel gear 2061. The first bevel gear 2061 engages with the second bevel gear 2062. The second bevel gear 2062 is connected with the second shaft 204. Through the first bevel gear 2061 and the second bevel gear 2062, the power of the first blade 201 and the second blade 202 acting on the first shaft 203 can be converted to the second shaft 204, and then to the generator 205.

[0052] It should be noted that in some embodiments, the power transmission mechanism 206 further includes a gear box 2063 for accommodating the first bevel gear 2061 and the second bevel gear 2062, so as to protect the first bevel gear 2061 and the second bevel gear 2062.

[0053] It can be understood that the power transmission mechanism 206 is not limited to the above structure, and can also have other forms. For example, the power transmission mechanism 206 includes the second bevel gear 2062 and a third bevel gear (not shown in the figure), the third bevel gear is engaged with the second bevel gear 2062, the third bevel gear is arranged at a position opposite to the first bevel gear 2061, the third bevel gear is connected with the first shaft 203, and the third bevel gear is arranged close to the second blade 202. Therefore, when the first blade 201 and the second blade 202 rotate, the first shaft 203 drives the third bevel gear to rotate, and then drives the second bevel gear 2062 to rotate, and the second bevel gear 2062 is connected with the second shaft 204, and then can act on the generator 205.

[0054] In other words, the first bevel gear 2061 can be engaged with the second bevel gear 2062, or the third bevel gear can be engaged with the second bevel gear 2062, and both can realize power transmission from the first shaft 203 to the second shaft 204. The design idea of the first bevel gear 2061 and the third bevel gear is consistent, and the two are a one-or-the-other scheme.

[0055] Through the above structural design of the embodiment of the application, wind energy can be converted into electric energy for external alternating current load or direct current load. The first blade 201 and the second blade 202 are designed into an asymmetric form in the embodiment of the application, so that the inherent deflection torque of the first shaft 203 and the second shaft 204 during transmission can be effectively offset, and the stable operation of the wind power generation device 2 is ensured.

[0056] Specifically, referring to FIG. 1 and FIG. 2, along the direction X in which the first shaft 203 is located, the width of the second blade 202 is increased by Δk relative to the width of the first blade 201, along the direction Y in which the second shaft 204 is located, the length of the first blade 201 and the length of the second blade 202 are the same, or, along the direction Y in which the second shaft 204 is located, the length of the second blade 202 is increased by Δ relative to the length of the first blade 201, and along the direction X in which the first shaft 203 is located, the width of the first blade 201 and the width of the second blade 202 are the same.

[0057] wherein,

[0058] L is the distance from the first blade 201 to the center of the second shaft 204 along the direction X; W is half of the width of the first blade 201 along the direction X; R is the force arm of the wind force on the first blade 201 along the direction Y; and k is the width of the first blade 201 along the direction X.

[0059] It can be understood that, since the length of the first blade 201 and the length of the second blade 202 are the same along the direction Y in which the second shaft 204 is located, R is also the force arm of the wind force on the second blade 202 along the direction Y.

[0060] wherein,

[0061] Δ takes a positive value, wherein L is the distance from the first blade 201 to the center of the second shaft 204 along the direction X; R is the force arm of the wind force on the first blade 201 along the direction Y; and is the length of the first blade 201 along the direction Y.

[0062] For the convenience of the reader's understanding of the inventive concept of the present application, the specific values of Δl and Δ are described below.

[0063] <Values of Δk>

[0064] Referring to FIG. 1, when the wind drives the first blade 201 and the second blade 202 to rotate, a driving torque Td is formed, with the first shaft 203 as the rotation axis. The value of the driving torque Td satisfies the following formula: Td=(F1+ΔF+F2)·R

[0065] wherein F1 is equal to F2, F2 is the force of the wind on the first blade 201, (F1+ΔF) is the force of the wind on the second blade 202, ΔF is the force increased due to the increase in the width of the second blade 202, and R is the force arm of the wind force on the first blade 201 along the direction Y.

[0066] The second shaft 204 forms a resistance, and according to the action and reaction, the driving torque Td causes the first blade 201 and the second blade 202 to deflect under the action of the power transmission mechanism 206, and a counter-deflection torque Tr is needed to offset, with the second shaft 204 as the rotation axis, the value of the counter-deflection torque Tr satisfying the following formula: Tr=ΔF·(L+W+Δk / 2)

[0067] wherein the AF is a force increased due to the width increase of the second blade 202, the L is a distance from the first blade 201 to the center of the second shaft 204 along the direction X, the W is a half of the width of the first blade 201 along the direction X, and the Ak is a width of the second blade 202 increased relative to the width of the first blade 201 along the direction X in which the first shaft 203 is located.

[0068] In order to offset the deflection torque inherent in the first shaft 203 and the second shaft 204 during transmission, reduce or even eliminate the oscillation of the wind power generation device 2 during operation, and ensure the stable operation of the wind power generation device 2, Td=Tr, and since F1=F2, the following formula can be obtained:

[0069] Since the force is related to the area of the first blade 201 or the second blade 202, the following geometric relationship can be obtained:

[0070] wherein the k is the width of the first blade 201 along the direction X in which the first shaft 203 is located.

[0071] Further solving obtains:

[0072] <Regarding the value of Ah>

[0073] Referring to FIG. 2, when the wind drives the first blade 201 and the second blade 202 to rotate, a driving torque Td is formed, and the first shaft 203 is taken as a rotation shaft. The value of the driving torque Td' satisfies the following formula: Td'= (F1+F2)·R+AF'(R+(+Δ) / 2)

[0074] wherein the F1 is equal to the F2, the F2 is a force of the wind acting on the first blade 201, the (F1+AF') is a force of the wind acting on the second blade 202, the AF' is a force increased due to the length increase of the second blade 202, the R is a force arm of the wind force received by the first blade 201 along the direction Y, the h is a length of the first blade 201 along the direction Y, the (h+Ah) is a length of the second blade 202 along the direction Y, and the Δ is a length of the second blade 202 increased relative to the length of the first blade 201 along the direction Y.

[0075] The second shaft 204 forms a resistance, and according to the action and reaction, the driving torque Td' deflects the first blade 201 and the second blade 202 under the action of the power transmission mechanism 206, and a counter-deflection torque Tr' is needed to offset, the Tr' is taken as the second shaft 204 as the rotation shaft, the value of the Tr' satisfies the following formula: Tr'=ΔF'·L

[0076] Wherein, the ΔF' is the force increased due to the length increase of the second blade 202, and the L is the distance from the first blade 201 to the center of the second shaft 204 along the direction X.

[0077] In order to offset the inherent deflection torque of the first shaft 203 and the second shaft 204 during transmission, reduce or even eliminate the oscillation of the left and right deflection of the wind power generation device 2 during operation, and ensure the stable operation of the wind power generation device 2, Td'=Tr' is obtained, and since F1=F2, the following formula can be obtained:

[0078] Since the force is related to the area of the first blade 201 or the second blade 202, the geometric relationship can be obtained:

[0079] Further solving obtains:

[0080] Wherein, the Δ takes a positive value.

[0081] In the embodiment of the present application, the wind power generation device 2 comprises a first blade 201 and a second blade 202; a first shaft 203, the first blade 201 and the second blade 202 are arranged at two ends of the first shaft 203, the first blade 201 can rotate around the first shaft 203, and the second blade 202 can rotate around the first shaft 203; a second shaft 204, which is arranged perpendicularly to the first shaft 203; a generator 205, an input end of which is connected with the second shaft 204; a power transmission mechanism 206, one end of which is connected with the first shaft 203, and the other end of which is connected with the second shaft 204, the power transmission mechanism 206 is used for transmitting the wind energy captured by the first blade 201 and / or the second blade 202 from the first shaft 203 to the second shaft 204, so as to drive the generator 205 to generate electricity. Through the above arrangement, the wind energy can be converted into electric energy, so as to be used by external AC load or DC load. In addition, in the embodiment of the present application, along the direction X in which the first shaft 203 is located, the width of the second blade 202 is increased by Δk relative to the width of the first blade 201, along the direction Y in which the second shaft 204 is located, the length of the first blade 201 is the same as the length of the second blade 202, or along the direction Y in which the second shaft 204 is located, the length of the second blade 202 is increased by Δ relative to the length of the first blade 201, and along the direction X in which the first shaft 203 is located, the width of the first blade 201 is the same as the width of the second blade 202. By widening or lengthening one side of the blade, the asymmetric blade structure design can effectively offset the inherent deflection torque of the first shaft 203 and the second shaft 204 during transmission, can reduce or even eliminate the oscillation of the wind power generation device 2 during operation, and can ensure the stable operation of the wind power generation device 2.

[0082] The embodiment of the application further provides an embodiment of an energy storage system 100, as shown in Figure 5, which comprises the wind power generation device 2, an energy storage system controller mainboard 1, an AC-DC rectifier 3, a filter 4, a step-up / down voltage converter 5, a first relay 6, a battery pack 7, a second relay 8, an inverter 9 and a display panel 12. The wind power generation device is connected with the AC-DC rectifier 3, the filter 4 is connected with the step-up / down voltage converter 5, the step-up / down voltage converter 5 is connected with the energy storage system controller mainboard 1, the step-up / down voltage converter 5 is connected with the first relay 6, the first relay 6 is connected with the energy storage system controller mainboard 1, the first relay 6 is connected with the battery pack 7, the battery pack 7 is connected with the second relay 8, the second relay 8 is connected with the energy storage system controller mainboard 1, the second relay 8 is connected with the inverter 9, and the inverter 9 is used for supplying power to an AC load 10 and a DC load 11. The display panel 12 is connected with the energy storage system controller mainboard 1 and can display the output state of the energy storage system 100. The specific structure and functions of the wind power generation device can refer to the above embodiment, which will not be repeated here.

[0083] In the embodiment of the application, the wind power generation device 2 generates AC power, which is sent to the step-up / down voltage converter 5 through the AC-DC rectifier 3 and the filter 4. The step-up / down voltage converter 5 receives the control signal of the energy storage system controller mainboard 1 to match the voltage and charge the battery pack 7 through the first relay 6. When the battery pack 7 is fully charged, the first relay 6 is disconnected. The electric energy in the battery pack 7 is sent to the inverter 9 through one path of the second relay 8, which can supply power to the AC load 10, and the other path can supply power to the DC load 11. When the battery pack 7 is under-voltage, the second relay 8 is disconnected. The energy storage system controller mainboard 1 can control the display panel 12 to display the output state.

[0084] It is worth noting that in some embodiments, the above display panel can also not be provided, and the functions of the energy storage system 100 provided by the embodiment of the application can also be realized.

[0085] The above description is only an embodiment of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A wind power plant, characterized in that The wind power generation device comprises: a first blade and a second blade; a first shaft, the first blade and the second blade are arranged at two ends of the first shaft, the first blade can rotate around the first shaft, and the second blade can rotate around the first shaft; a second shaft, which is arranged perpendicularly to the first shaft; a generator, an input end of the generator is connected with the second shaft; a power transmission mechanism, one end of the power transmission mechanism is connected with the first shaft, and the other end of the power transmission mechanism is connected with the second shaft, the power transmission mechanism is used for transmitting wind energy captured by the first blade and / or the second blade from the first shaft to the second shaft to drive the generator to generate electricity; wherein, along a direction X in which the first shaft is located, the width of the second blade is increased by Δk relative to the width of the first blade; along a direction Y in which the second shaft is located, the length of the first blade is the same as the length of the second blade; or, along the direction Y in which the second shaft is located, the length of the second blade is increased by Δh relative to the length of the first blade; along the direction X in which the first shaft is located, the width of the first blade is the same as the width of the second blade; wherein the L is a distance from the first blade to the center of the second shaft along the direction X; the W is half of the width of the first blade along the direction X; the R is a force arm of wind force received by the first blade along the direction Y; and the k is the width of the first blade along the direction X; wherein, the Δh is a positive value, wherein the L is a distance from the first blade to the center of the second shaft along the direction X; the R is a force arm of wind force received by the first blade along the direction Y; and the h is the length of the first blade along the direction Y.

2. The wind power plant according to any one of claims 1, characterized in that The wind power generation device further comprises a first spoke and a first hub, the first hub is rotationally connected with the first shaft, one end of the first spoke is connected with the first hub, and the other end of the first spoke is connected with the first blade.

3. The wind power plant according to claim 2, characterized in that The number of the first blades is multiple, and the number of the first spokes is multiple, one first blade is connected with one first spoke.

4. The wind power plant according to claim 3, characterized in that The wind power generation device further comprises a second spoke and a second hub, the second hub is rotationally connected with the first shaft, one end of the second spoke is connected with the second hub, and the other end of the second spoke is connected with the second blade.

5. The wind power plant according to claim 4, characterized in that The number of the second blades is multiple, and the number of the second spokes is multiple, one second blade is connected with one second spoke. The number of the second blades is the same as the number of the first blades.

6. The wind power plant according to claim 1, characterized in that The power transmission mechanism comprises a first bevel gear and a second bevel gear, the first shaft is connected with the first bevel gear, the first bevel gear engages with the second bevel gear, and the second bevel gear is connected with the second shaft.

7. The wind power plant according to claim 1, characterized in that The wind power generation device further comprises a first frame and a second frame, the first frame is arranged outside the first blade, and the second frame is arranged outside the second blade.

8. An energy storage system characterized by, The wind power generation device comprises a wind power generation device as claimed in any one of claims 1-7, an energy storage system controller mainboard, an AC-DC rectifier, a filter, a voltage booster and reducer, a first relay, a battery pack, a second relay and an inverter; The wind power generation device is connected with the AC-DC rectifier, the filter is connected with the voltage booster and reducer, the voltage booster and reducer is connected with the energy storage system controller mainboard, the voltage booster and reducer is connected with the first relay, the first relay is connected with the energy storage system controller mainboard, the first relay is connected with the battery pack, the battery pack is connected with the second relay, the second relay is connected with the energy storage system controller mainboard, the second relay is connected with the inverter, and the inverter is used for supplying power to an AC load and a DC load.

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