Wheel-driven bearing cable type gravity flow energy storage system and energy storage method

Abstract

The invention discloses a wheel-driven bearing cable type gravity flow energy storage system and an energy storage method, and relates to the technical field of gravity energy storage. The wheel-driven bearing cable type gravity flow energy storage system comprises a first steering wheel, a second steering wheel, a carrying device, an energy storage device, a driving device, a power generation device, a bearing cable and a traction cable, the energy storage device is detachably connected to the carrying device; the driving device drives the traction cable to operate in the first direction so as to convey the multiple energy storage devices to the high altitude position, and electric energy is converted into gravitational potential energy to be stored. A plurality of carrying devices loaded with energy storage devices walk along the bearing cable and are conveyed to a low altitude position successively to form a continuous gravity flow so as to drive the power generation device to discharge continuously. The energy storage method is suitable for the wheel-driven bearing cable type gravity flow energy storage system. The invention provides a wheel-driven bearing cable type gravity flow energy storage system and an energy storage method, and aims to solve the technical problem of discontinuous charging and discharging caused by intermittent load generated by lifting energy storage blocks one by one in the prior art.

Description

Technical Field

[0001] The present invention relates to a gravity energy storage technology in the electric power field, and in particular to a wheel-driven load-bearing rope-type gravity flow energy storage system and an energy storage method. Background Art

[0002] In recent years, my country's electricity demand has maintained a steady growth trend, and the peak load characteristics have become increasingly prominent. However, my country's coal and natural gas supply is tight, prices remain high, thermal power companies are facing difficulties in operation, and the dual control of energy consumption and the uncertainty of hydropower output have led to tight electricity supply in some areas. Therefore, new power generation technologies such as wind power / photovoltaic power have emerged, and their proportion in energy utilization is gradually increasing. However, renewable energy dominated by wind power and photovoltaic power is characterized by randomness, volatility and intermittency. It is an unstable energy source and cannot fully meet the social electricity demand. For this reason, it is necessary to use energy storage systems to regulate the demand for power generation and electricity consumption. At present, there are many forms of energy storage, including gravity energy storage, electrochemical energy storage, chemical energy storage, and thermal energy storage. However, electrochemical energy storage, chemical energy storage, and thermal energy storage methods have energy loss problems, are not suitable for long-term energy storage, and generally have safety problems; pumped storage and flywheel energy storage in gravity energy storage have high requirements for terrain and space, and are difficult to deploy widely. Therefore, gravity energy storage based on height difference for power generation has gradually attracted attention. The existing gravity energy storage system uses a large load to be lifted one by one, which has the following technical problems: the intermittent load generated by lifting the energy storage blocks one by one and the charging and discharging are discontinuous. Summary of the invention

[0003] The object of the present invention is to provide a wheel-driven load-bearing rope gravity flow energy storage system and energy storage method, so as to solve the technical problem of discontinuous charging and discharging caused by intermittent loads generated by lifting energy storage blocks one by one in the prior art to a certain extent.

[0004] In order to achieve the above object, the present invention provides the following technical solutions: A wheel-driven load-bearing rope type gravity flow energy storage system, comprising a first steering wheel, a second steering wheel, a carrier, an energy storage device, a driving device and a power generation device, and also comprising at least one pair of load-bearing ropes for bearing the carrier and at least one pair of traction ropes for traction the carrier; the energy storage device is detachably connected to the carrier; Each of the traction cables circulates between the first steering wheel and the second steering wheel; the number of the first steering wheels and the number of the second steering wheels are consistent with the number of the traction cables; wherein the first steering wheel is located at a low altitude position, and the second steering wheel is located at a high altitude position opposite to the low altitude position; The driving device is connected to the first steering wheel and / or the second steering wheel to drive the traction rope to run in a first direction; all the carrying devices travel under the traction of the traction rope, so that the multiple energy storage devices can be transported to a high altitude along the carrying rope successively, thereby converting electrical energy into gravitational potential energy for storage; The power generation device is connected to the first steering wheel and / or the second steering wheel; the multiple carriers loaded with the energy storage devices move along the carrying rope to successively transport the multiple energy storage devices to a low altitude and form a continuous gravity flow, and at the same time drive the first steering wheel and the second steering wheel to rotate along the traction rope along the second direction to drive the power generation device to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby realizing continuous discharge; wherein the first direction is opposite to the second direction.

[0005] In a possible implementation manner, an axial direction of the first steering wheel and an axial direction of the second steering wheel are both parallel to a horizontal direction.

[0006] In a possible implementation manner, all of the first steering wheels are connected via a first coupling, and all of the second steering wheels are connected via a second coupling; The first steering wheel and the second steering wheel are both provided with wheel grooves matched with the traction rope; The first steering wheel and the second steering wheel are both connected to the bracket; The driving device is connected to the first coupling and / or the second coupling; The power generation device is connected to the first coupling and / or the second coupling; The driving device and the power generation device are electric generators, or the driving device and the power generation device are independent of each other.

[0007] In a possible implementation manner, each of the traction ropes is ring-shaped; the traction rope includes a first traction rope portion, a second traction rope portion and two traction matching portions; the two traction matching portions are matched with the first steering wheel and the second steering wheel respectively; two ends of the first traction rope portion and two ends of the second traction rope portion are respectively connected to the traction matching portions to form a ring; The first traction rope portion and the second traction rope portion each include two traction guide segments and one traction inclined segment; the traction inclined segment is connected between the two traction guide segments; The wheel-driven load-bearing rope gravity flow energy storage system further includes a traction guide device; the traction guide device is provided at both the low altitude position and the high altitude position; The traction inclined section is located between the traction guide device at the low altitude position and the traction guide device at the high altitude position.

[0008] In a possible implementation manner, the load-bearing cable comprises two load-bearing fixed sections, two load-bearing guide sections and one load-bearing inclined section; the load-bearing guide section is connected between the load-bearing fixed section and the load-bearing inclined section; The wheel-driven load-bearing cable-type gravity flow energy storage system further comprises a load-bearing fixing device, a load-bearing supporting device and a load-bearing guiding device; the load-bearing fixing device, the load-bearing supporting device and the load-bearing guiding device are both provided at the low altitude position and the high altitude position; The end of each of the load-bearing cables passes through the load-bearing guide device and the load-bearing support device in sequence and is fixedly connected to the load-bearing fixing device; the load-bearing fixing section is located between the load-bearing fixing device and the load-bearing support device, the load-bearing guide section is located between the load-bearing support device and the load-bearing guide device, and the load-bearing inclined section is located between the load-bearing guide device at a low altitude and the load-bearing guide device at a high altitude; The load-bearing fixing device adopts an anchoring method; The traction guide section is parallel to the horizontal direction; the load-bearing guide section is parallel to the horizontal direction; The first traction rope portion is connected to the top of the first steering wheel, and the second traction rope portion is connected to the bottom of the first steering wheel; the position of the traction guide section of the first traction rope portion corresponds to the position of the load-bearing guide section, and the position of the traction inclined section of the first traction rope portion corresponds to the position of the load-bearing inclined section.

[0009] In a possible implementation, the carrier includes a connecting frame, a suspension frame, a traveling wheel set, and a rope connection structure; The suspension frame is rotatably connected to the connecting frame; the energy storage device is detachably connected to the suspension frame; At least one pair of the running wheel groups are arranged on both sides of the connecting frame; the running wheel groups are configured to be able to run on the carrying cables; the number of the running wheel groups is consistent with the number of the carrying cables; At least one pair of the rope connection structures is rotatably connected to both sides of the connection frame; the rope connection structure is fixedly connected to the traction rope, and an angle is formed between the rotation axis of the rope connection structure and the extension direction of the traction rope.

[0010] In a possible implementation manner, each of the traction ropes is ring-shaped; The rope connection structure comprises a rope connection body and a claw; the claw is fixedly connected to the end of the rope connection body, and the jaw of the claw faces the center line of the traction rope; The claw is fixedly connected to the traction rope; A carrying bearing is connected between the rope connection body and the connecting frame.

[0011] In a possible implementation, the traveling wheel set includes at least one wheel assembly; when there are multiple wheel assemblies, the multiple wheel assemblies are sequentially arranged along the extension direction of the carrying cable; The wheel assembly includes a running wheel and a wheel connector; in the same wheel assembly, the number of the running wheels is at least two, and all the running wheels are rotatably connected to the wheel connector in sequence along the extension direction of the load-bearing cable; the wheel connector is pivotally connected to the connecting frame.

[0012] In a possible implementation, the wheel assembly further includes a pivot axis and a wheel axle parallel to the pivot axis; In the same wheel assembly, the number of the wheel connectors is two, the traveling wheel is clamped between the two wheel connectors along the third direction, the wheel axle passes through the two wheel connectors and the traveling wheel, and the traveling wheel is configured to be able to rotate around the wheel axle; the pivot shaft passes through the two wheel connectors and is connected to the connecting frame, the two wheel connectors are configured to be able to swing around the pivot shaft, the pivot shaft is parallel to the third direction, and has an angle with the extension direction of the load-bearing cable.

[0013] In a possible implementation, the connecting frame includes a connecting frame body and a wheel set mounting portion; the wheel set mounting portions arranged in pairs are symmetrically connected to both ends of the connecting frame body; the suspension frame is rotatably connected to the connecting frame body, and the walking wheel set is connected to the wheel set mounting portion; At least two running wheel groups are arranged on a single side of the connecting frame, wherein the two running wheel groups are arranged on both sides of the wheel group mounting portion, and the pivot shafts corresponding to the two running wheel groups are the same pivot shaft; the pivot shaft passes through the wheel group mounting portion and is connected to the corresponding wheel connecting member.

[0014] In a possible implementation manner, the traveling wheel groups arranged in pairs are symmetrically arranged on the connecting frame; the carrying cables arranged in pairs are symmetrically arranged on both sides of the carrying device; the traction cables arranged in pairs are symmetrically arranged on both sides of the carrying device; The traction rope is located between the supporting ropes arranged in pairs; the supporting rope is located above the traction rope; The suspension frame includes at least two suspension rod parts; the suspension rod parts are connected between the connecting frame and the energy storage device.

[0015] In a possible implementation, the load-bearing rope and the traction rope are both connected to a tensioning device; the tensioning device includes one or more of a weight-type structure, a hydraulic structure, and a screw-type structure.

[0016] In a possible implementation manner, the wheel-driven load-bearing cable gravity flow energy storage system further includes a transfer device and a stacking yard; the low-altitude position and the high-altitude position are both provided with the transfer device and the stacking yard; The energy storage device is transported back and forth between the storage yard and the transport device by the transfer equipment.

[0017] An energy storage method is applicable to the above-mentioned wheel-driven load-bearing cable gravity flow energy storage system; the method comprises: During energy storage charging, the energy storage device is located at a low altitude, and the driving device is driven by electric energy to drive the first steering wheel and the second steering wheel to rotate in a first direction, so as to drive the traction rope to run in a first direction, thereby driving all the carriers to move under the traction of the traction rope; multiple energy storage devices are successively assembled on the carriers, successively transported to a high altitude along the carrying rope and unloaded, so as to convert the electric energy into gravitational potential energy for storage; During discharge, the energy storage device is located at a high altitude, and multiple energy storage devices are successively assembled on the carrier, travel along the carrying rope to a low altitude and are unloaded, driving the traction rope to rotate in the second direction; the traction rope drives the first steering wheel and the second steering wheel to rotate in the second direction to drive the power generation device to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy.

[0018] In a possible implementation manner, a plurality of the energy storage devices are mounted one by one on the carrier at a preset interval so that the energy storage devices are continuously carried; The travel speed and spacing of the energy storage device are adjusted in real time according to demand to change the size of the gravity flow, thereby adjusting the energy flow on demand, and further realizing the "slow charging and fast discharging" or "charging and discharging on demand" function.

[0019] In a possible implementation, the number of the wheel-driven load-bearing cable-type gravity flow energy storage systems is multiple; According to the hillside terrain, multiple wheel-driven load-bearing rope-type gravity flow energy storage systems are installed in parallel in the horizontal direction, and / or, according to the hillside terrain, multiple wheel-driven load-bearing rope-type gravity flow energy storage systems are stacked in the vertical direction.

[0020] The beneficial effects of the present invention are mainly: The wheel-driven load-bearing rope type gravity flow energy storage system and energy storage method provided by the present invention drive the energy storage device to move by means of traction ropes arranged in pairs, and the load-bearing ropes arranged in pairs bear the load of the energy storage device. Compared with using a single rope for simultaneous load bearing and traction, the system has higher safety and stability. By circulating the traction rope between the first steering wheel and the second steering wheel, the energy storage device can be transported successively by the carrying device, which not only improves the system transportation capacity, but also provides a continuous gravity flow, which can be converted into a continuous energy flow by a power generation device, thereby realizing continuous discharge.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the first structure of a wheel-driven load-bearing cable-type gravity flow energy storage system provided by an embodiment of the present invention; Figure 2 and Figure 3 for Figure 1 A partial enlarged view of the wheel-driven load-bearing cable gravity flow energy storage system shown; Figure 4 for Figure 1 The schematic diagram of the structure of the second steering wheel, the driving device and the power generation device shown; Figure 5 for Figure 1 The schematic diagram of the structure of the carrier device and the energy storage device shown; Figure 6 A second structural schematic diagram of a wheel-driven load-bearing cable-type gravity flow energy storage system provided in an embodiment of the present invention; Figure 7 for Figure 6 A partial enlarged view of the wheel-driven load-bearing cable gravity flow energy storage system shown; Figure 8 for Figure 6 The schematic diagram of the structure of the carrier device and the energy storage device shown; Fig. 9 for Figure 8 An enlarged partial view of the carrier shown; Fig.10 A schematic structural diagram of a rope connection structure provided in an embodiment of the present invention.

[0024] Icons: 110- load-bearing rope; 111- load-bearing fixed section; 112- load-bearing guide section; 113- load-bearing inclined section; 114- load-bearing fixed device; 115- load-bearing support device; 120- traction rope; 122- traction guide section; 123- traction inclined section; 126- traction guide device; 130- first steering wheel; 140- second steering wheel; 200-carrying device; 210-connecting frame; 211-connecting frame body; 212-wheel assembly mounting portion; 220-suspension frame; 221-suspension rod portion; 230-traveling wheel assembly; 231-traveling wheel; 232-wheel connecting member; 233-pivot shaft; 234-wheel axle; 240-rope connecting structure; 241-rope connecting body; 242-claw; 243-jaw; 244-carrying bearing; 300-energy storage device; 400-driving device; 500-power generation device. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] Example This embodiment provides a wheel-driven load-bearing cable gravity flow energy storage system and energy storage method; please refer to Figure 1-Figure 10 , Figure 1-Figure 5 The wheel-driven load-carrying rope type gravity flow energy storage system shown in the figure shows a pair of load-carrying ropes and a pair of traction ropes. Figure 6-Figure 9 The wheel-driven load-carrying cable-type gravity flow energy storage system shown shows two pairs of load-carrying cables and one pair of traction cables.

[0033] The wheel-driven, cable-loaded gravity flow energy storage system provided in this embodiment can be used to store electrical energy, especially electrical energy generated by power generation technologies such as wind power and photovoltaic power generation, and can also be used to generate continuous discharge.

[0034] See also Figure 1-Figure 10As shown, the wheel-driven load-bearing rope gravity flow energy storage system includes a first steering wheel 130, a second steering wheel 140, a carrier 200, an energy storage device 300, a driving device 400 and a power generation device 500, and also includes at least one pair of load-bearing ropes 110 for carrying the carrier 200 and at least one pair of traction ropes 120 for traction of the carrier 200; the energy storage device 300 is detachably connected to the carrier 200; optionally, each of the carriers 200 is located between the paired load-bearing ropes and the paired traction ropes.

[0035] Each traction rope 120 circulates between the first steering wheel 130 and the second steering wheel 140; the number of the first steering wheels 130 is consistent with the number of the traction ropes 120, that is, the number of the first steering wheels 130, the number of the second steering wheels 140 and the number of the traction ropes 120 are consistent. For example, when the number of the traction ropes 120 is a pair, the number of the first steering wheels 130 and the number of the second steering wheels 140 are two each. The first steering wheel 130 is located at a low altitude position; the second steering wheel 140 is located at a high altitude position opposite to the low altitude position; wherein the altitude of the high altitude position is higher than the altitude of the low altitude position.

[0036] A plurality of carriers 200 are connected to the traction cable 120 along the running direction of the traction cable 120 .

[0037] The driving device 400 is connected to the first steering wheel 130 and / or the second steering wheel 140, so as to drive the traction rope 120 to run in the first direction, that is, to drive the first steering wheel 130 and the second steering wheel 140 to rotate around the first direction; all the carriers 200 configured to load the energy storage device 300 are driven under the traction of the traction rope 120, so as to enable multiple energy storage devices 300 to be successively transported to a high altitude along the carrying rope 110, thereby converting electrical energy into gravitational potential energy storage and realizing the charging function. Among them, the driving device 400 is connected to the first steering wheel 130 and / or the second steering wheel 140, specifically, the driving device 400 is connected to the first steering wheel 130, or the driving device 400 is connected to the second steering wheel 140, or the driving device 400 is connected to the first steering wheel 130 and the second steering wheel 140.

[0038] The power generation device 500 is connected to the first steering wheel 130 and / or the second steering wheel 140; multiple carriers 200 loaded with energy storage devices 300 configured to carry energy storage devices 300 walk along the carrying cable 110 to successively transport multiple energy storage devices 300 to a low altitude and form a continuous gravity flow, and at the same time drive the first steering wheel 130 and the second steering wheel 140 to run along the traction cable 120 in the second direction to drive the power generation device 500 to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby realizing continuous discharge; wherein the first direction is opposite to the second direction, for example, if the first direction is clockwise, the second direction is counterclockwise, and vice versa. In this embodiment, the driving device 400 drives the traction cable 120 through the steering wheel to pull the carrier 200 to walk along the carrying cable 110, and transport the energy storage device 300 to rise and fall, so that the gravity flow formed by the continuous online movement of several energy storage devices 300 is converted into a continuous energy flow, thereby realizing continuous charging and discharging.

[0039] Optionally, the first steering wheel 130 and the second steering wheel 140 are both connected to the bracket.

[0040] The wheel-driven load-bearing rope gravity flow energy storage system described in this embodiment drives the energy storage device 300 to move through the paired traction ropes 120, and the paired load-bearing ropes 110 bear the load of the energy storage device 300. Compared with using a single rope for simultaneous load-bearing and traction, it has higher safety and stability; through the traction rope 120 circulating between the first steering wheel 130 and the second steering wheel 140, the energy storage device 300 can be transported successively through the carrying device 200, which not only improves the system transportation capacity, but also provides a continuous gravity flow, which can be converted into a continuous energy flow through the power generation device 500, thereby realizing continuous discharge.

[0041] See also Figure 1-Figure 7 As shown, in the optional solution of this embodiment, the axial direction of the first steering wheel 130 and the axial direction of the second steering wheel 140 are both parallel to the horizontal direction; it is equivalent to placing the first steering wheel 130 and the second steering wheel 140 vertically. Compared with horizontal placement, the required ground space is smaller, the terrain requirements are simpler, and it is convenient to install in more sloped areas. At the same time, the smaller installation space is convenient for installing multiple systems at the same time, which can improve the system's transportation capacity and increase the high-power storage / discharge of electric energy.

[0042] See also Figure 2-Figure 4 , Figure 7 As shown, in an optional solution of this embodiment, all the first steering wheels 130 are connected via a first coupling; all the first steering wheels 130 are connected via the first coupling so that all the first steering wheels 130 rotate synchronously.

[0043] Optionally, all the second steering wheels 140 are connected via a second coupling; all the second steering wheels 140 are connected via the second coupling so that all the second steering wheels 140 rotate synchronously.

[0044] Optionally, the first steering wheel 130 and the second steering wheel 140 are both provided with wheel grooves that cooperate with the traction rope 120. The wheel grooves can improve the friction between the traction rope 120 and the first steering wheel 130 and the second steering wheel 140, and can also prevent the traction rope 120 from being separated from the first steering wheel 130 and the second steering wheel 140.

[0045] Optionally, the drive device 400 is connected to the first coupling and / or the second coupling, that is, the drive device 400 is connected to the first steering wheel 130 and / or the second steering wheel 140. In this embodiment, the drive device 400 can be set at a low altitude position or a high altitude position, or the drive device 400 is set at both the low altitude position and the high altitude position to drive the coupling. Being located at a high altitude position can reduce the load during the energy storage process, and being located at a low altitude position facilitates the installation of the drive device 400.

[0046] Optionally, the power generation device 500 is connected to the first coupling and / or the second coupling, that is, the power generation device 500 is connected to the first steering wheel 130 and / or the second steering wheel 140. In this embodiment, the power generation device 500 can be set at a low altitude or a high altitude, or the power generation device 500 is connected to the coupling at both the low altitude and the high altitude. Being located at a high altitude can reduce the load during the energy storage process, and being located at a low altitude facilitates the installation of the power generation device 500.

[0047] In this embodiment, the driving device 400 and the power generation device 500 can be integrated or separated. Optionally, the driving device 400 and the power generation device 500 are electric generators, or the driving device 400 and the power generation device 500 are independent of each other. Among them, the electric generator (English name Motor-Generator), in this embodiment, refers to a device that can be used as a motor to convert electrical energy into gravitational potential energy, and can also be used as a generator to convert gravitational potential energy into electrical energy, and it has a bidirectional energy conversion function.

[0048] See also Figure 1-Figure 3 , Figure 6 and Figure 7 As shown, in an optional scheme of this embodiment, each traction rope 120 is ring-shaped; the traction rope 120 includes a first traction rope portion, a second traction rope portion and two traction matching portions; the two traction matching portions are matched with the first steering wheel 130 and the second steering wheel 140 respectively; the two ends of the first traction rope portion and the two ends of the second traction rope portion are respectively connected to the traction matching portions to form a ring; that is, the first traction rope portion, the traction matching portion, the second traction rope portion and the traction matching portion are connected end to end to form a ring.

[0049] The first traction rope portion and the second traction rope portion each include two traction guide segments 122 and one traction inclined segment 123 ; the traction inclined segment 123 is connected between the two traction guide segments 122 .

[0050] The wheel-driven load-bearing rope gravity flow energy storage system also includes a traction guide device 126; the traction guide device 126 is provided at both the low altitude position and the high altitude position; the traction inclined section 123 is located between the traction guide device 126 at the low altitude position and the traction guide device 126 at the high altitude position. The traction inclined section 123 is located, for example, on a hillside between the low altitude position and the high altitude position. Through the traction guide device 126, the traction rope 120 can be guided from an inclined state to a horizontal state, and the traction rope 120 can also be guided from a horizontal state to an inclined state. The two traction guide sections 122 facilitate the transportation of the energy storage device 300.

[0051] See also Figure 1-Figure 3 , Figure 6 and Figure 7 As shown, in an optional solution of this embodiment, the load-bearing cable 110 includes two load-bearing fixed sections 111, two load-bearing guide sections 112 and one load-bearing inclined section 113; the load-bearing guide section 112 is connected between the load-bearing fixed section 111 and the load-bearing inclined section 113. That is, the load-bearing cable 110 includes the load-bearing fixed section 111, the load-bearing guide section 112, the load-bearing inclined section 113, the load-bearing guide section 112 and the load-bearing fixed section 111 connected in sequence. In this embodiment, the load-bearing cable 110 is in a broken line shape.

[0052] The wheel-driven load-bearing rope gravity flow energy storage system also includes a load-bearing fixing device 114, a load-bearing support device 115 and a load-bearing guide device (the load-bearing guide device is not shown in the figure in order to show other structures more clearly); the load-bearing fixing device 114, the load-bearing support device 115 and the load-bearing guide device are arranged at both the low altitude position and the high altitude position.

[0053] The end of each load-bearing cable 110 passes through the load-bearing guide device and the load-bearing support device 115 in sequence and is fixedly connected to the load-bearing fixing device 114; the load-bearing fixing section 111 is located between the load-bearing fixing device 114 and the load-bearing support device 115, the load-bearing guide section 112 is located between the load-bearing support device 115 and the load-bearing guide device, and the load-bearing inclined section 113 is located between the load-bearing guide device at a low altitude position and the load-bearing guide device at a high altitude position; the two load-bearing guide sections 112 are used to assist in the transportation of the energy storage device 300 at low altitude positions and high altitude positions, and the load-bearing fixing section 111 is used to fix the end of the load-bearing cable 110.

[0054] Optionally, the load-bearing fixing device 114 adopts an anchoring method or other fixing methods.

[0055] Optionally, the traction guide section 122 is parallel to the horizontal direction; by traction guide section 122 being parallel to the horizontal direction, the energy storage device 300 can be easily transported.

[0056] Optionally, the bearing guide section 112 is parallel to the horizontal direction; by making the bearing guide section 112 parallel to the horizontal direction, the energy storage device 300 can be easily transported.

[0057] Optionally, the first traction rope part is connected to the top of the first steering wheel 130, and the second traction rope part is connected to the bottom of the first steering wheel 130, that is, the first traction rope part is connected to the top of the second steering wheel 140, and the second traction rope part is connected to the bottom of the second steering wheel 140. The position of the traction guide section 122 of the first traction rope part corresponds to the position of the load-bearing guide section 112, and the position of the traction inclined section 123 of the first traction rope part corresponds to the position of the load-bearing inclined section 113. This design is helpful to improve the stability and accuracy of the carrier 200 when walking.

[0058] See also Figure 5 and Figure 8 As shown, in an optional solution of this embodiment, the carrier 200 includes a connecting frame 210, a suspension frame 220, a running wheel set 230 and a rope connection structure 240.

[0059] The suspension bracket 220 can be rotatably connected to the connecting bracket 210 ; for example, the suspension bracket 220 can be rotated 360 degrees on the connecting bracket 210 .

[0060] The energy storage device 300 can be detachably connected to the suspension bracket 220 .

[0061] At least one pair of running wheel assemblies 230 is disposed on both sides of the connecting frame 210 ; the running wheel assemblies 230 are configured to be able to run on the carrying cables 110 ; and the number of the running wheel assemblies 230 is consistent with the number of the carrying cables 110 .

[0062] At least one pair of rope connection structures 240 can be rotatably connected to both sides of the connecting frame 210; the rope connection structure 240 is fixedly connected to the traction rope 120, and an angle is formed between the rotation axis of the rope connection structure 240 and the extension direction of the traction rope 120. Optionally, the rotation axis of the rope connection structure 240 is perpendicular to the extension direction of the traction rope 120. The rope connection structure 240 can be rotatably connected to the connecting frame 210, so that the carrier 200 can walk along the annular traction rope 120. The connecting frame 210 is connected by using the rope connection structures 240 arranged in pairs to improve the stability of the carrier 200 when walking. In this embodiment, the number of pairs of rope connection structures 240 can be selected according to factors such as the material of the rope connection structure 240 and the connection strength.

[0063] See also Fig. 9 and Fig.10As shown, in an optional solution of this embodiment, each traction rope 120 is annular. The rope connection structure 240 can be in various forms, such as a claw type, a lock, etc. For example, the rope connection structure 240 includes a rope connection body 241 and a claw 242; the claw 242 is fixedly connected to the end of the rope connection body 241, and the jaw 243 of the claw 242 faces the center line of the traction rope 120; by the jaw 243 of the claw 242 facing the center line of the traction rope 120, it is convenient for the claw 242 to move with the traction rope 120, when the carrier 200 rotates to the first steering wheel 130 or the second steering wheel 140, the rotation interference of the rope connection structure 240 at the first steering wheel 130 or the second steering wheel 140 is reduced, so that the rope connection structure 240 can smoothly pass through the first steering wheel 130 or the second steering wheel 140.

[0064] The claw 242 is fixedly connected to the traction rope 120. A carrying bearing 244 is connected between the rope connection body 241 and the connecting frame 210. The carrying bearing 244 is used to reduce the friction between the rope connection body 241 and the connecting frame 210, which helps the carrier 200 to rotate at the first steering wheel 130 or the second steering wheel 140.

[0065] Optionally, the carrier bearing 244 is a sliding bearing. The sliding bearing has a high load-bearing capacity, which provides a guarantee for the wheel-driven cable-type gravity flow energy storage system to continuously transport the energy storage device 300.

[0066] See also Figure 1-Figure 10 As shown, in an optional scheme of this embodiment, the running wheel group 230 includes at least one wheel assembly; when the number of wheel assemblies is multiple, the multiple wheel assemblies are arranged in sequence along the extension direction of the load-bearing cable 110; through the multiple wheel assemblies, the load-bearing cable 110 can better support the carrying device 200 and the energy storage device 300 through the running wheel group 230.

[0067] The wheel assembly includes a running wheel 231 and a wheel connector 232; in the same wheel assembly, the number of the running wheels 231 is at least two, and all the running wheels 231 are rotatably connected to the wheel connector 232 in sequence along the extension direction of the load-bearing cable 110; the wheel connector 232 is pivotally connected to the connecting frame 210. The running wheel 231 and the wheel connector 232 further improve the carrying capacity of the running wheel assembly 230 and the stability during walking.

[0068] Optionally, in order to further improve the carrying capacity of the traveling wheel assembly 230 and the stability during traveling, the wheel assembly further includes a pivot shaft 233 and a wheel axle 234 parallel to the pivot shaft 233; in the same wheel assembly, the number of wheel connectors 232 is two, the traveling wheel 231 is sandwiched between the two wheel connectors 232 along the third direction, the wheel axle 234 passes through the two wheel connectors 232 and the traveling wheel 231, and the traveling wheel 231 is configured to be able to rotate around the wheel axle 234; the pivot shaft 233 passes through the two wheel connectors 232 and is connected to the connecting frame 210, the two wheel connectors 232 are configured to be able to swing around the pivot shaft 233, the pivot shaft 233 is parallel to the third direction, and there is an angle between the pivot shaft 233 and the extension direction of the load-bearing cable 110. Optionally, the pivot shaft 233 is perpendicular to the extension direction of the load-bearing cable 110.

[0069] See also Figure 1-Figure 8 As shown, in an optional scheme of this embodiment, the connecting frame 210 includes a connecting frame body 211 and a wheel set mounting portion 212; the wheel set mounting portions 212 arranged in pairs are symmetrically connected to the two ends of the connecting frame body 211; the suspension frame 220 is rotatably connected to the connecting frame body 211, and the walking wheel set 230 is connected to the wheel set mounting portion 212; by setting the connecting frame 210 as the connecting frame body 211 and the wheel set mounting portion 212, it helps the connecting frame 210 to support the connecting suspension frame 220, the walking wheel set 230 and the rope connecting structure 240.

[0070] like Figure 6-Figure 9 As shown, at least two running wheel assemblies 230 are arranged on one side of the connecting frame 210, wherein the two running wheel assemblies 230 are arranged on both sides of the wheel assembly mounting portion 212, and the corresponding pivot shafts 233 of the two running wheel assemblies 230 are the same pivot shaft 233; the pivot shaft 233 passes through the wheel assembly mounting portion 212 and is connected to the corresponding wheel connecting member 232. By arranging at least two running wheel assemblies 230, the walking stability of the carrying device 200 is improved.

[0071] Optionally, the walking wheel groups 230 arranged in pairs are symmetrically arranged on the connecting frame 210; optionally, the carrying ropes 110 arranged in pairs are symmetrically arranged on both sides of the carrying device 200; optionally, the traction ropes 120 arranged in pairs are symmetrically arranged on both sides of the carrying device 200.

[0072] Optionally, the traction cable 120 is located between the paired load-bearing cables 110 ; the load-bearing cables 110 are located above the traction cable 120 ; and by locating the load-bearing cables 110 above the traction cable 120 , it helps the load-bearing cables 110 to carry the carrier 200 and the energy storage device 300 .

[0073] Optionally, the suspension frame 220 includes at least two suspension rods 221, and the suspension rods 221 are connected between the connection frame 210 and the energy storage device 300. The at least two suspension rods 221 can improve the bearing capacity and stability of the suspension frame 220 in carrying the energy storage device 300.

[0074] In the optional solution of this embodiment, the load-bearing cable 110 and the traction cable 120 are both connected with a tensioning device; the tensioning device includes one or more of a weight hammer structure, a hydraulic structure and a screw structure, and the tensioning device can also adopt other forms of structures. The tensioning device is used to increase the pre-tightening force of the load-bearing cable 110 and the traction cable 120, which helps the load-bearing cable 110 and the traction cable 120 to operate normally. Figure 1 and Figure 6 The tensioning device shown is a screw-type structure.

[0075] In an optional scheme of this embodiment, the wheel-driven load-bearing rope gravity flow energy storage system also includes transfer equipment and a storage yard; transfer equipment and a storage yard are provided at both the low-altitude and high-altitude locations; the energy storage device 300 is transported back and forth between the storage yard and the carrier device 200 through the transfer equipment to realize charging, energy storage and discharging.

[0076] Compared with the prior art, the wheel-driven load-bearing cable-type gravity flow energy storage system provided in this embodiment has the following beneficial effects: 1. The paired traction ropes 120 are used to drive the energy storage device 300 to move, and the paired load-bearing ropes 110 bear the load of the energy storage device 300, which effectively reduces the load borne by a single cableway, ensures the safety and reliability of the system, and improves the system's ability to bear loads. Compared with using a single rope for both carrying and traction, it is safer and more stable. At the same time, the reduction in the load of a single cableway means that more energy storage devices 300 can be transported simultaneously, which improves the system's transportation capacity, ensures efficient operation of energy storage and power generation, and can achieve high-power storage / discharge of electrical energy.

[0077] 2. The axial direction of the first steering wheel 130 and the axial direction of the second steering wheel 140 are parallel to the horizontal direction, which is similar to placing the rotating wheel vertically. Compared with horizontal placement, the required ground space is smaller, the terrain requirements are simpler, and it is convenient to install in more sloped areas. At the same time, the smaller installation space is convenient for installing multiple systems at the same time, which can improve the system's transportation capacity and increase the high-power storage / discharge of electric energy.

[0078] 3. The carrier 200 is fixedly installed on the load-bearing cable 110, and the carrier 200 loaded with the energy storage device 300 transports the energy storage device 300 along the load-bearing cable 110. Compared with the detachable installation, not only is the system structure simple, but also the use of components that need to be frequently opened and closed is avoided, thereby ensuring the reliability of the system installation and reducing the maintenance cost.

[0079] 4. The load-bearing cable 110 is used as the sliding track, which avoids heavy components such as rails, reduces the difficulty of transportation during system installation, and is more convenient for deployment.

[0080] 5. The transport system of the energy storage device 300 generates a continuous gravity flow, which can form a stable and adjustable energy flow, thereby achieving continuous discharge.

[0081] 6. The real-time power consumption or power generation can be adjusted arbitrarily by changing the lifting speed of the gravity flow or the size of the gravity flow; the energy storage device 300 stores energy safely and economically and accesses energy efficiently and quickly.

[0082] This embodiment also provides an energy storage method, which is applicable to the wheel-driven load-bearing cable gravity flow energy storage system described in any of the above embodiments. The method comprises: During energy storage charging, the energy storage device 300 is located at a low altitude, and the driving device 400 is driven by electric energy to drive the first steering wheel 130 and the second steering wheel 140 to rotate in a first direction, so as to drive the traction rope 120 to run in the first direction, and then drive all the carriers 200 to move under the traction of the traction rope 120; multiple energy storage devices 300 are successively assembled on the carrier 200, and successively transported to a high altitude along the carrying rope 110 and unloaded, so as to convert the electric energy into gravitational potential energy storage; During discharge, the energy storage device 300 is located at a high altitude, and multiple energy storage devices 300 are successively assembled on the carrier 200 and move along the carrying rope 110 to a low altitude and unloaded, driving the traction rope 120 to rotate in the second direction; the traction rope 120 drives the first steering wheel 130 and the second steering wheel 140 to rotate in the second direction to drive the power generation device 500 to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy, so that the gravity flow formed by the continuous online movement of several energy storage devices 300 is converted into a continuous energy flow, thereby realizing continuous charging and discharging.

[0083] The energy storage method described in this embodiment drives the energy storage device 300 to move through the paired traction ropes 120 of the wheel-driven load-bearing rope gravity flow energy storage system, and the paired load-bearing ropes 110 bear the load of the energy storage device 300. Compared with using a single rope for simultaneous load-bearing and traction, the method has higher safety and stability. The traction rope 120 circulates between the first steering wheel 130 and the second steering wheel 140, and the energy storage device 300 can be transported successively through the carrier 200, which not only improves the system transportation capacity, but also provides a continuous gravity flow, which can be converted into a continuous energy flow through the power generation device 500, thereby realizing continuous discharge.

[0084] The energy storage method provided in this embodiment is applicable to the above-mentioned wheel-driven load-bearing rope-type gravity flow energy storage system. The technical features of the above-disclosed wheel-driven load-bearing rope-type gravity flow energy storage system are also applicable to the energy storage method. The technical features of the above-disclosed wheel-driven load-bearing rope-type gravity flow energy storage system are no longer described repeatedly. The wheel-driven load-bearing rope-type gravity flow energy storage system described in this embodiment adopts the above-mentioned energy storage method. The above-disclosed energy storage method is also applicable to the wheel-driven load-bearing rope-type gravity flow energy storage system.

[0085] In an optional solution of this embodiment, a plurality of energy storage devices 300 are installed one by one on the carrier 200 at a preset interval so that the energy storage devices 300 are continuously carried. The preset interval may be, for example, one energy storage device 300 is installed for each carrier 200, one energy storage device 300 is installed for every other carrier 200, or one energy storage device 300 is installed for every two carriers 200.

[0086] The travel speed and spacing of the energy storage device 300 are adjusted in real time according to demand to change the size of the gravity flow, so as to adjust the energy flow on demand, and then realize the "slow charging and fast discharging" or "charging and discharging on demand" function. The travel speed of the energy storage device 300 can be adjusted, for example, by adjusting the speed of the driving device 400 and the power generation device 500. By adjusting the travel speed and spacing of the energy storage device 300 in real time according to demand to change the size of the gravity flow, the wheel-driven load-bearing rope gravity flow energy storage system can be more adaptable.

[0087] In the optional scheme of this embodiment, the number of wheel-driven load-bearing rope gravity flow energy storage systems is multiple; multiple wheel-driven load-bearing rope gravity flow energy storage systems are installed in parallel in the horizontal direction according to the hillside terrain, and / or multiple wheel-driven load-bearing rope gravity flow energy storage systems are stacked in the up and down directions according to the hillside terrain. By installing multiple wheel-driven load-bearing rope gravity flow energy storage systems in parallel in the horizontal direction according to the hillside terrain, and stacking multiple wheel-driven load-bearing rope gravity flow energy storage systems in the up and down directions according to the hillside terrain, larger-scale energy storage can be achieved.

[0088] In order to more clearly understand the wheel-driven load-bearing cable-type gravity flow energy storage system and energy storage method described in this embodiment, the following examples are given: Power storage stage: During the power storage process, when the driving device 400 and the power generation device 500 are electric generators, the electric generator plays a core role in energy conversion. The electric generator draws electrical energy from the power grid and converts it into kinetic energy. The kinetic energy is then smoothly transferred to the first steering wheel 130 and the second steering wheel 140, driving them to rotate in a clockwise direction. The first steering wheel 130 and the second steering wheel 140 drive the traction rope 120 to start moving by virtue of the friction between their surfaces and the traction rope 120. The first steering wheel 130 and the second steering wheel 140 both rotate in a clockwise direction. As the traction rope 120 continues to move, the carrier 200 clamped thereon is pulled along the load rope 110 and begins to move forward. The carrier 200 is equipped with a suspension frame 220, which suspends the energy storage device 300 located in the lower yard so that it moves with the carrier 200. When approaching the upper yard, the energy storage device 300 is separated from the suspension frame 220 on the carrier 200, and the energy storage device 300 is sent to the upper yard and quickly transported away by the transfer vehicle for storage. The carrier 200 continues to travel along the traction rope 120, and finally returns to the lower yard again, ready to start a new round of energy storage device 300 transportation task.

[0089] Discharge phase: During the discharge process, the energy storage device 300 located in the upper yard is brought into a section of the load-bearing cable 110 by the carrier 200. Here, the energy storage device 300 is fixed by the suspension bracket 220 on the carrier 200. Subsequently, under the action of gravity, the energy storage device 300 slides down along the load-bearing cable 110 with the carrier 200, releasing the contained energy. The carrier 200 drives the traction cable 120 to start moving through its clamping force. The traction cable 120 transmits the motion to the first steering wheel 130 and the second steering wheel 140 through the friction between it and the first steering wheel 130 and the second steering wheel 140, driving the first steering wheel 130 and the second steering wheel 140 to rotate in a counterclockwise direction, and then transmits it to the electric generator. The electric generator enters the power generation mode, converts the kinetic energy into electrical energy, and inputs it into the power grid. When approaching the lower yard, the energy storage device 300 is separated from the suspension frame 220 on the carrier 200, and the energy storage device 300 is sent to the lower yard and transported away by the transfer vehicle for storage. The carrier 200 continues to travel along the traction rope 120. Finally, the carrier 200 returns to the upper yard, ready to start a new round of energy storage device 300 transportation tasks.

[0090] An example of power generation using the wheel-driven load-bearing cable gravity flow energy storage system and energy storage method described in this embodiment: The energy storage device 300 is mainly made of reinforced concrete with a density of 2500kg / m 3The shape is a cuboid with a length of 1.2 meters, a width of 1.2 meters, and a height of 1.0 meters, and weighs 3.6 tons. Assuming the vertical height difference of the hillside is 500 meters, a single energy storage device 300 is lifted from the bottom of the hill (i.e., the low altitude position) to the top of the hill (i.e., the high altitude position), and the energy that can be stored is E=mgh=3.6×10 3 kg×9.8m / s 2 ×500m=17,640,000J=4.9 kWh. Referring to the operating speed of passenger ropeways, freight ropeways, mine hoists and other equipment, if the speed is 8 meters per second, it can run 28.8 kilometers per hour. Assuming that the energy storage device 300 is arranged at intervals of 10 meters, 2880 energy storage devices 300 can be transported to the top of the mountain per hour, and 2880 × 4.9 kWh / unit = 14112.0 kW·h≈14.1 MWh of energy can be stored per hour. In order to improve the power generation capacity, multiple systems can be arranged in parallel rows and / or stacked up and down on the hillside terrain; the speed of the traction rope 120 can also be increased or the spacing between the energy storage devices 300 can be reduced to expand the energy storage scale.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wheel-driven load-bearing cable gravity flow energy storage system, characterized in that: The invention comprises a first steering wheel (130), a second steering wheel (140), a carrier (200), an energy storage device (300), a driving device (400) and a power generation device (500), and also comprises at least one pair of carrying ropes (110) for carrying the carrier (200) and at least one pair of traction ropes (120) for traction the carrier (200); the energy storage device (300) is detachably connected to the carrier (200); Each of the traction cables (120) circulates between the first steering wheel (130) and the second steering wheel (140); the number of the first steering wheels (130) and the number of the second steering wheels (140) are consistent with the number of the traction cables (120); wherein the first steering wheel (130) is located at a low altitude position, and the second steering wheel (140) is located at a high altitude position opposite to the low altitude position; The driving device (400) is connected to the first steering wheel (130) and / or the second steering wheel (140) so as to drive the traction rope (120) to run in a first direction; all the carriers (200) travel under the traction of the traction rope (120) so as to enable the plurality of energy storage devices (300) to be successively transported to a high altitude along the carrying rope (110), thereby converting electrical energy into gravitational potential energy for storage; The power generation device (500) is connected to the first steering wheel (130) and / or the second steering wheel (140); a plurality of the carriers (200) loaded with the energy storage devices (300) travel along the carrying rope (110) to successively transport the plurality of energy storage devices (300) to a low altitude and form a continuous gravity flow, while driving the first steering wheel (130) and the second steering wheel (140) to rotate along the traction rope (120) in a second direction to drive the power generation device (500) to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby achieving continuous discharge; wherein the first direction is opposite to the second direction.

2. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 1, characterized in that: The axial direction of the first steering wheel (130) and the axial direction of the second steering wheel (140) are both parallel to the horizontal direction.

3. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 1, characterized in that: All of the first steering wheels (130) are connected via a first coupling, and all of the second steering wheels (140) are connected via a second coupling; The first steering wheel (130) and the second steering wheel (140) are both provided with wheel grooves that cooperate with the traction rope (120); The first steering wheel (130) and the second steering wheel (140) are both connected to the bracket; The driving device (400) is connected to the first coupling and / or the second coupling; The power generation device (500) is connected to the first coupling and / or the second coupling; The driving device (400) and the power generation device (500) are electric generators, or the driving device (400) and the power generation device (500) are independent of each other.

4. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 1, characterized in that: Each of the traction ropes (120) is ring-shaped; the traction rope (120) comprises a first traction rope portion, a second traction rope portion and two traction matching portions; the two traction matching portions are matched with the first steering wheel (130) and the second steering wheel (140) respectively; two ends of the first traction rope portion and two ends of the second traction rope portion are respectively connected to the traction matching portions to form a ring shape; The first traction rope portion and the second traction rope portion both comprise two traction guide sections (122) and one traction inclined section (123); the traction inclined section (123) is connected between the two traction guide sections (122); The wheel-driven, load-bearing rope-type gravity flow energy storage system further comprises a traction guide device (126); the traction guide device (126) is provided at both the low altitude position and the high altitude position; The traction inclined section (123) is located between the traction guide device (126) at the low altitude position and the traction guide device (126) at the high altitude position.

5. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 4, characterized in that: The load-bearing cable (110) comprises two load-bearing fixed sections (111), two load-bearing guide sections (112) and one load-bearing inclined section (113); the load-bearing guide section (112) is connected between the load-bearing fixed section (111) and the load-bearing inclined section (113); The wheel-driven load-bearing cable-type gravity flow energy storage system further comprises a load-bearing fixing device (114), a load-bearing supporting device (115) and a load-bearing guiding device; the load-bearing fixing device (114), the load-bearing supporting device (115) and the load-bearing guiding device are arranged at both the low altitude position and the high altitude position; The end of each load-bearing cable (110) passes through the load-bearing guide device and the load-bearing support device (115) in sequence and is fixedly connected to the load-bearing fixing device (114); the load-bearing fixing section (111) is located between the load-bearing fixing device (114) and the load-bearing support device (115); the load-bearing guide section (112) is located between the load-bearing support device (115) and the load-bearing guide device; and the load-bearing inclined section (113) is located between the load-bearing guide device at a low altitude position and the load-bearing guide device at a high altitude position; The load-bearing fixing device (114) adopts an anchoring method; The traction guide section (122) is parallel to the horizontal direction; the load-bearing guide section (112) is parallel to the horizontal direction; The first traction rope portion is connected to the top of the first steering wheel (130), and the second traction rope portion is connected to the bottom of the first steering wheel (130); the position of the traction guide section (122) of the first traction rope portion corresponds to the position of the load-bearing guide section (112), and the position of the traction inclined section (123) of the first traction rope portion corresponds to the position of the load-bearing inclined section (113).

6. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 1, characterized in that: The carrier (200) comprises a connecting frame (210), a suspension frame (220), a running wheel set (230) and a rope connection structure (240); The suspension frame (220) is rotatably connected to the connection frame (210); the energy storage device (300) is detachably connected to the suspension frame (220); At least one pair of the running wheel assemblies (230) is arranged on both sides of the connecting frame (210); the running wheel assemblies (230) are configured to be able to run on the carrying cables (110); the number of the running wheel assemblies (230) is the same as the number of the carrying cables (110); At least one pair of the rope connection structures (240) is rotatably connected to both sides of the connection frame (210); the rope connection structure (240) is fixedly connected to the traction rope (120), and an angle is formed between the rotation axis of the rope connection structure (240) and the extension direction of the traction rope (120).

7. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 6, characterized in that: Each of the traction ropes (120) is ring-shaped; The rope connection structure (240) comprises a rope connection body (241) and a claw (242); the claw (242) is fixedly connected to the end of the rope connection body (241), and the jaw (243) of the claw (242) faces the center line of the traction rope (120); The claw (242) is fixedly connected to the traction rope (120); A carrying bearing (244) is connected between the rope connection body (241) and the connection frame (210).

8. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 6, characterized in that: The traveling wheel set (230) comprises at least one wheel assembly; when there are multiple wheel assemblies, the multiple wheel assemblies are arranged in sequence along the extension direction of the load-bearing cable (110); The wheel assembly comprises a running wheel (231) and a wheel connecting member (232); in the same wheel assembly, the number of the running wheels (231) is at least two, and all the running wheels (231) are rotatably connected to the wheel connecting member (232) in sequence along the extension direction of the load-bearing cable (110); and the wheel connecting member (232) is pivotally connected to the connecting frame (210).

9. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 8, characterized in that: The wheel assembly further comprises a pivot shaft (233) and a wheel shaft (234) parallel to the pivot shaft (233); In the same wheel assembly, the number of the wheel connectors (232) is two, the running wheel (231) is sandwiched between the two wheel connectors (232) along a third direction, the wheel axle (234) passes through the two wheel connectors (232) and the running wheel (231), and the running wheel (231) is configured to be able to rotate around the wheel axle (234); the pivot shaft (233) passes through the two wheel connectors (232) and is connected to the connecting frame (210), the two wheel connectors (232) are configured to be able to swing around the pivot shaft (233), and the pivot shaft (233) is parallel to the third direction and has an angle with the extension direction of the load-bearing cable (110).

10. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 9, characterized in that: The connecting frame (210) comprises a connecting frame body (211) and a wheel assembly mounting portion (212); the wheel assembly mounting portions (212) arranged in pairs are symmetrically connected to two ends of the connecting frame body (211); the suspension frame (220) is rotatably connected to the connecting frame body (211), and the running wheel assembly (230) is connected to the wheel assembly mounting portion (212); At least two running wheel assemblies (230) are arranged on one side of the connecting frame (210), wherein the two running wheel assemblies (230) are arranged on both sides of the wheel assembly mounting portion (212), and the pivot shafts (233) corresponding to the two running wheel assemblies (230) are the same pivot shaft (233); the pivot shaft (233) passes through the wheel assembly mounting portion (212) and is connected to the corresponding wheel connecting member (232).

11. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 6, characterized in that: The traveling wheel groups (230) arranged in pairs are symmetrically arranged on the connecting frame (210); the carrying cables (110) arranged in pairs are symmetrically arranged on both sides of the carrier (200); and the traction cables (120) arranged in pairs are symmetrically arranged on both sides of the carrier (200); The traction rope (120) is located between the supporting ropes (110) arranged in pairs; the supporting rope (110) is located above the traction rope (120); The suspension frame (220) comprises at least two suspension rod portions (221); the suspension rod portions (221) are connected between the connection frame (210) and the energy storage device (300).

12. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 1, characterized in that: The load-bearing rope (110) and the traction rope (120) are both connected to a tensioning device; the tensioning device comprises one or more of a weight-type structure, a hydraulic type structure and a screw type structure.

13. The wheel-driven load-bearing cable gravity flow energy storage system according to claim 1, characterized in that: The wheel-driven load-bearing cable gravity flow energy storage system also includes a transfer device and a stacking yard; the low-altitude position and the high-altitude position are both provided with the transfer device and the stacking yard; The energy storage device (300) is transported back and forth between the storage yard and the transport device (200) by the transfer equipment.

14. An energy storage method, characterized in that: Applicable to the wheel-driven load-bearing cable gravity flow energy storage system according to any one of claims 1 to 13; the method comprises: During energy storage charging, the energy storage device (300) is located at a low altitude, and the driving device (400) is driven by electric energy to drive the first steering wheel (130) and the second steering wheel (140) to rotate in a first direction, so as to drive the traction rope (120) to run in a first direction, thereby driving all the carriers (200) to travel under the traction of the traction rope (120); multiple energy storage devices (300) are successively assembled on the carriers (200), successively transported to a high altitude along the carrying rope (110) and unloaded, thereby converting the electric energy into gravitational potential energy for storage; During discharge, the energy storage device (300) is located at a high altitude, and a plurality of the energy storage devices (300) are successively mounted on the carrier (200), travel along the carrying rope (110) to a low altitude and are unloaded, driving the traction rope (120) to rotate in a second direction; the traction rope (120) drives the first steering wheel (130) and the second steering wheel (140) to rotate in the second direction, so as to drive the power generation device (500) to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy.

15. The energy storage method according to claim 14, characterized in that: A plurality of the energy storage devices (300) are assembled one by one on the carrier (200) at a preset interval, so that the energy storage devices (300) are continuously carried; The travel speed and spacing of the energy storage device (300) are adjusted in real time according to demand to change the magnitude of the gravity flow, thereby achieving the adjustment of the energy flow on demand, thereby realizing the "slow charging and fast discharging" or "charging and discharging on demand" functions.

16. The energy storage method according to claim 14, characterized in that: The number of the wheel-driven load-bearing cable-type gravity flow energy storage systems is multiple; According to the hillside terrain, multiple wheel-driven load-bearing rope-type gravity flow energy storage systems are installed in parallel in the horizontal direction, and / or, according to the hillside terrain, multiple wheel-driven load-bearing rope-type gravity flow energy storage systems are stacked in the vertical direction.

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