Carrying-cable-type gravity-flow energy storage system, and energy storage method

Abstract

A carrying-cable-type gravity-flow energy storage system, and an energy storage method, which relate to the technical field of gravity energy storage. The carrying-cable-type gravity-flow energy storage system comprises a first steering structure, a second steering structure, carrier apparatuses, energy storage apparatuses, a driving apparatus, a power generation apparatus, carrying cables for carrying the carrier apparatuses, and traction cables for hauling the carrier apparatuses, wherein the energy storage apparatuses are detachably connected to the carrier apparatuses; the driving apparatus drives the traction cables to operate, so as to convey the plurality of energy storage apparatuses to a high-altitude position, thereby converting electrical energy into gravitational potential energy for storage; and the plurality of carrier apparatuses loaded with the energy storage apparatuses travel along the carrying cables and are successively conveyed to a low-altitude position, so as to form a continuous gravity flow, thereby driving the power generation apparatus to continuously discharge. The energy storage method uses the carrying-cable-type gravity-flow energy storage system. The present application provides a carrying-cable-type gravity-flow energy storage system and an energy storage method, in order to solve the technical problem in the prior art of charging and discharging being discontinuous due to intermittent loads generated by lifting and lowering energy storage blocks one by one.

Description

Cable-type gravity flow energy storage system and energy storage method

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent applications filed on April 14, 2025, entitled “Wheel-driven load-bearing cable gravity flow energy storage system and energy storage method” and “Load-bearing cable gravity flow energy storage system”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of gravity energy storage technology, and more specifically, to a load-bearing cable gravity flow energy storage system and energy storage method. Background Technology

[0004] New power generation technologies such as wind and solar power have emerged and are gradually increasing their proportion in energy utilization. However, renewable energy sources, primarily wind and solar power, are characterized by randomness, volatility, and intermittency, making them unstable energy sources that cannot fully meet societal electricity demands. Therefore, energy storage systems are needed to regulate power generation and consumption. Current energy storage forms include gravity storage, electrochemical storage, chemical storage, and thermal storage. However, electrochemical, chemical, and thermal storage suffer from energy loss issues, making them unsuitable for long-term storage, and they generally have stability and reliability problems. Gravity storage methods such as pumped hydro storage and flywheel storage have high requirements for terrain and space, making widespread deployment difficult. Therefore, gravity storage, which generates power based on elevation differences, is gradually gaining attention. Existing gravity storage systems use large loads to raise and lower the energy storage blocks sequentially for charging and discharging; however, the intermittent loads generated by raising and lowering the energy storage blocks sequentially present technical problems of discontinuous charging and discharging.

[0005] Application content

[0006] The purpose of this application is to provide a load-bearing cable gravity flow energy storage system and energy storage method, so as to solve to some extent the technical problem of discontinuous charging and discharging caused by the intermittent load generated by the sequential lifting of energy storage blocks in the prior art.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A cable-driven gravity flow energy storage system includes a first steering structure, a second steering structure, a carrier device, an energy storage device, a drive device, and a power generation device. It also includes at least one pair of carrier cables configured to support the carrier device and at least one pair of traction cables configured to pull the carrier device. The energy storage device is detachably connected to the carrier device.

[0009] The traction cable circulates between the first steering structure and the second steering structure; wherein the first steering structure is located at a low altitude and the second steering structure is located at a high altitude opposite to the low altitude.

[0010] The drive device is connected to the first steering structure and / or the second steering structure to drive the traction cable to rotate in the first direction; all the transport devices move under the traction of the traction cable to enable multiple energy storage devices to be successively transported to high altitudes along the carrying cable, thereby converting electrical energy into gravitational potential energy for storage.

[0011] The power generation device is connected to the first steering structure and / or the second steering structure; multiple transport devices carrying the energy storage devices travel along the carrying cable to successively transport the multiple energy storage devices to a low altitude and form a continuous gravity flow, while driving the first steering structure and the second steering structure to rotate along the traction cable in a 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.

[0012] Optionally, in any of the above technical solutions, the axial direction of both the first steering structure and the axial direction of the second steering structure are parallel to the horizontal direction.

[0013] In any of the above technical solutions, optionally, the first steering structure and the second steering structure are a steering wheel or a drum, respectively;

[0014] When the first steering structure or the second steering structure is a steering wheel, the number of steering wheels located at low altitude or high altitude is the same as the number of traction cables, and the steering wheel is provided with a wheel groove that cooperates with the traction cable; all the steering wheels located at low altitude or high altitude are connected by a coupling, and the drive device or the power generation device is respectively connected to the coupling;

[0015] When the first steering structure or the second steering structure is a drum, the drum is provided with a number of grooves consistent with the number of all the traction cables, and the drive device or the power generation device is respectively connected to the drum shaft;

[0016] Both the first steering structure and the second steering structure are connected to the bracket;

[0017] The drive device and the power generation device are electric generators, or the drive device and the power generation device are independent of each other.

[0018] In any of the above technical solutions, optionally, each of the traction cables is ring-shaped; the traction cable includes a first traction cable section, a second traction cable section, and two traction engagement sections; the two traction engagement sections respectively engage with the first steering structure and the second steering structure; the two ends of the first traction cable section and the two ends of the second traction cable section are respectively connected to the traction engagement sections, forming a ring;

[0019] Both the first traction cable section and the second traction cable section include two traction guide sections and one traction tilt section; the traction tilt section is connected between the two traction guide sections.

[0020] The load-bearing cable gravity flow energy storage system also includes a traction guide device; the traction guide device is installed at both the low-altitude location and the high-altitude location.

[0021] The traction tilting section is located between the traction guide device at the low altitude and the traction guide device at the high altitude.

[0022] In any of the above technical solutions, optionally, the load-bearing cable includes 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 sections and the load-bearing inclined section;

[0023] The load-bearing cable gravity flow energy storage system further includes a load-bearing fixing device, a load-bearing support device, and a load-bearing guiding device; the load-bearing fixing device, the load-bearing support device, and the load-bearing guiding device are provided at both the low-altitude location and the high-altitude location;

[0024] The end of each of the load-bearing cables passes sequentially through the load-bearing guide device and the load-bearing support device 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 tilting section is located between the load-bearing guide device at the low altitude and the load-bearing guide device at the high altitude.

[0025] The load-bearing fixing device adopts an anchoring method;

[0026] The traction guide section is parallel to the horizontal direction; the load-bearing guide section is parallel to the horizontal direction.

[0027] The first traction cable is connected to the top of the first steering structure, and the second traction cable is connected to the bottom of the first steering structure; the position of the traction guide section of the first traction cable corresponds to the position of the load-bearing guide section, and the position of the traction tilt section of the first traction cable corresponds to the position of the load-bearing tilt section.

[0028] In any of the above technical solutions, the transport device may optionally include a transport frame, a connecting frame, a set of wheels, and a rope connection structure;

[0029] When both the first steering structure and the second steering structure are steering wheels, the connecting frame is a suspension frame, and the suspension frame is rotatably connected to the transport frame; when at least one of the first steering structure and the second steering structure is a drum, the connecting frame is a support frame, and the support frame is fixedly connected to the transport frame.

[0030] The energy storage device can be detachably connected to the connecting frame;

[0031] At least one pair of the traveling wheel sets are disposed on both sides of the transport frame; the traveling wheel sets are configured to travel on the support cables; the number of the traveling wheel sets is the same as the number of the support cables;

[0032] At least one pair of the rope connection structures are rotatably connected to both sides of the transport frame; the rope connection structure is fixedly connected to the traction cable, and the rotation axis of the rope connection structure forms an angle with the extension direction of the traction cable.

[0033] Optionally, in any of the above technical solutions, each of the traction cables is looped;

[0034] The rope connection structure includes a rope connection body and a clamp; the clamp is fixedly connected to the end of the rope connection body, and the jaws of the clamp face the centerline of the traction cable;

[0035] The gripper is fixedly connected to the traction cable;

[0036] A transport bearing is connected between the rope connecting body and the transport frame.

[0037] In any of the above technical solutions, optionally, the walking wheel set includes at least one wheel assembly; when the number of wheel assemblies is multiple, the multiple wheel assemblies are arranged sequentially along the extension direction of the bearing cable;

[0038] The wheel assembly includes a traveling wheel and a wheel connector; in the same wheel assembly, the number of the traveling wheels is at least two, and all the traveling wheels are rotatably connected to the wheel connector in sequence along the extension direction of the carrying cable; the wheel connector is pivotally connected to the transport frame.

[0039] Optionally, in any of the above technical solutions, the wheel assembly further includes a pivot shaft and a wheel axle parallel to the pivot shaft;

[0040] In the same wheel assembly, there are two wheel connectors. The traveling wheel is sandwiched between the two wheel connectors along a third direction. The wheel axle passes through the two wheel connectors and the traveling wheel. The traveling wheel is configured to rotate about the wheel axle. The pivot shaft passes through the two wheel connectors and is connected to the carrier frame. The two wheel connectors are configured to swing about the pivot shaft. The pivot shaft is parallel to the third direction and has an angle with the extension direction of the carrying cable.

[0041] In any of the above technical solutions, optionally, the transport frame includes a transport frame body and a wheel assembly mounting part; the wheel assembly mounting parts arranged in pairs are symmetrically connected to both ends of the transport frame body; the connecting frame is connected to the transport frame body, and the walking wheel set is connected to the wheel assembly mounting part;

[0042] The transport frame is provided with at least two sets of walking wheels on one side, wherein the two sets of walking wheels are located on both sides of the wheel assembly mounting part, and the pivot shafts corresponding to the two sets of walking wheels are the same pivot shaft; the pivot shaft passes through the wheel assembly mounting part and connects to the corresponding wheel connector.

[0043] In any of the above technical solutions, optionally, the paired walking wheel sets are symmetrically arranged on the transport frame; the paired load-bearing cables are symmetrically arranged on both sides of the transport device; the paired traction cables are symmetrically arranged on both sides of the transport device.

[0044] The traction cable is located between the paired support cables; the support cable is located above the traction cable;

[0045] The connecting frame includes at least two connecting rods; the connecting rods connect the carrier frame and the energy storage device.

[0046] In any of the above technical solutions, optionally, both the bearing cable and the traction cable are connected to a tensioning device; the tensioning device includes one or more of a counterweight structure, a hydraulic structure, and a screw structure.

[0047] Optionally, in any of the above technical solutions, the load-bearing cable gravity flow energy storage system further includes a transfer device and a storage yard configured to store the energy storage device; the transfer device and the storage yard are provided at both the low-altitude location and the high-altitude location; the energy storage device is transported back and forth between the storage yard and the transport device via the transfer device.

[0048] An energy storage method employing the aforementioned cable-stayed gravity flow energy storage system; the method includes:

[0049] During energy storage and charging, the energy storage device is located at a low altitude. The drive device is driven by electrical energy, which drives the first steering structure and the second steering structure to rotate in a first direction, thereby driving the traction cable to run in the first direction, and then driving all the transport devices to move under the traction of the traction cable; multiple energy storage devices are successively assembled on the transport devices, and successively transported to a high altitude along the carrying cable and unloaded, thereby converting electrical energy into gravitational potential energy for storage.

[0050] During discharge, the energy storage device is located at a high altitude. Multiple energy storage devices are successively assembled on the transport device, travel along the carrying cable to a low altitude, and are unloaded, driving the traction cable to rotate in the second direction. The traction cable drives the first steering structure and the second steering structure to rotate in the second direction, so as to drive the power generation device to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy.

[0051] In any of the above technical solutions, optionally, multiple energy storage devices are assembled one by one on the carrier device at a preset interval, so that the energy storage devices are carried continuously;

[0052] The speed and spacing of the energy storage device can be adjusted in real time according to demand to change the magnitude of the gravity flow, thereby achieving on-demand adjustment of energy flow and realizing the functions of "slow charging and fast discharging" or "charging and discharging on demand".

[0053] In any of the above technical solutions, optionally, the number of the cable-mounted gravity flow energy storage systems is multiple;

[0054] Multiple load-bearing cable-stayed gravity flow energy storage systems may be installed side-by-side in the horizontal direction according to the hillside topography, and / or multiple load-bearing cable-stayed gravity flow energy storage systems may be stacked vertically according to the hillside topography.

[0055] The main benefits of this application are:

[0056] The load-bearing cable-type gravity flow energy storage system and method provided in this application use paired traction cables to drive the energy storage device to move. The paired load-bearing cables bear the load of the energy storage device. Compared with using a single rope for both load-bearing and traction, this method has higher reliability and stability. By circulating the traction cables between the first and second steering structures, the energy storage device can be transported successively by the transport device. This not only improves the system's transport capacity but also provides a continuous gravity flow. The continuous gravity flow can be converted into a continuous energy flow by the power generation device, thereby achieving continuous discharge.

[0057] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0058] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 is a schematic diagram of the first structure of the load-bearing cable gravity flow energy storage system provided in an embodiment of this application;

[0060] Figures 2 and 3 are enlarged views of the cable-type gravity flow energy storage system shown in Figure 1.

[0061] Figure 4 is a structural schematic diagram of the second steering structure, drive device and power generation device shown in Figure 1;

[0062] Figure 5 is a structural schematic diagram of the carrier and energy storage device shown in Figure 1;

[0063] Figure 6 is a schematic diagram of a second structure of the load-bearing cable gravity flow energy storage system provided in an embodiment of this application;

[0064] Figure 7 is a partial enlarged view of the cable-type gravity flow energy storage system shown in Figure 6;

[0065] Figure 8 is a structural schematic diagram of the carrier and energy storage device shown in Figure 6;

[0066] Figure 9 is a partial enlarged view of the transport device shown in Figure 8;

[0067] Figure 10 is a structural schematic diagram of the rope connection structure provided in an embodiment of this application;

[0068] Figure 11 is a schematic diagram of the third structure of the load-bearing cable gravity flow energy storage system provided in the embodiment of this application;

[0069] Figures 12 and 13 are enlarged views of the cable-type gravity flow energy storage system shown in Figure 11.

[0070] Figure 14 is a schematic diagram of the second steering structure, drive device and power generation device shown in Figure 11;

[0071] Figure 15 is a structural schematic diagram of the transport device and energy storage device shown in Figure 11;

[0072] Figure 16 is a schematic diagram of the fourth structure of the cable-supported gravity flow energy storage system provided in the embodiments of this application;

[0073] Figure 17 is a partial enlarged view of the cable-type gravity flow energy storage system shown in Figure 16;

[0074] Figure 18 is a structural schematic diagram of the transport device and energy storage device shown in Figure 16;

[0075] Figure 19 is an enlarged view of area A of the carrier and energy storage device shown in Figure 18.

[0076] Icons: 110-Bearing cable; 111-Bearing fixed section; 112-Bearing guide section; 113-Bearing inclined section; 114-Bearing fixed device; 115-Bearing support device; 120-Traction cable; 122-Traction guide section; 123-Traction inclined section; 126-Traction guide device; 130-First steering structure; 140-Second steering structure; 150-Steering wheel; 160-Drum; 200-Carrying device; 210-Carrying frame; 211-Carrying frame body; 212-Wheel set mounting part; 220-Connecting frame; 221-Suspension frame; 222-Support frame; 230-Traveling wheel set; 231-Traveling wheel; 232-Wheel connector; 233-Pivot shaft; 234-Wheel axle; 240-Rope connection structure; 241-Rope connection body; 242-Claw gripper; 243-Jaw; 244-Carrying bearing; 300 - Energy storage device; 400 - Drive device; 500 - Power generation device. Detailed Implementation

[0077] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0078] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0079] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0080] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0081] Furthermore, terms such as "horizontal," "vertical," and "suspension" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the aforementioned structure must be completely horizontal, but can be slightly tilted.

[0082] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0083] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0084] Example

[0085] This embodiment provides a load-bearing cable gravity flow energy storage system and energy storage method; please refer to Figures 1-19. The load-bearing cable gravity flow energy storage system shown in Figures 1-5 and 11-15 shows a pair of load-bearing cables and a pair of traction cables. The load-bearing cable gravity flow energy storage system shown in Figures 6-9 and 16-19 shows two pairs of load-bearing cables and a pair of traction cables. The load-bearing cable gravity flow energy storage system shown in Figures 1-9 shows that the first steering structure 130 and the second steering structure 140 are both steering wheels 150. The load-bearing cable gravity flow energy storage system shown in Figures 11-19 shows that the first steering structure 130 and the second steering structure 140 are both drums 160.

[0086] The load-bearing cable gravity flow energy storage system provided in this embodiment can be used to store electrical energy, especially electrical energy generated by wind power and photovoltaic power generation technologies, and can also be used to generate continuous discharge.

[0087] Referring to Figures 1-19, the cable-stayed gravity flow energy storage system includes a first steering structure 130, a second steering structure 140, a transport device 200, an energy storage device 300, a drive device 400, and a power generation device 500. It also includes at least one pair of support cables 110 configured to support the transport device 200 and at least one pair of traction cables 120 configured to traction the transport device 200. The energy storage device 300 is detachably connected to the transport device 200. Multiple transport devices 200 are connected to the traction cables 120 along the direction of rotation of the traction cables 120. Optionally, each transport device 200 is located between the paired support cables and the paired traction cables. In one embodiment, the cable-stayed gravity flow energy storage system further includes a storage yard configured to store the energy storage device 300. In one embodiment, the load-bearing cable gravity flow energy storage system further includes a transfer device; the energy storage device 300 is transported back and forth between the storage yard and the transport device 200 via the transfer device to achieve charging, energy storage and discharging.

[0088] The traction cable 120 circulates between the first steering structure 130 and the second steering structure 140; the first steering structure 130 is located at a low altitude; the second steering structure 140 is located at a high altitude relative to the low altitude; wherein the altitude of the high altitude is higher than that of the low altitude. Optionally, transfer equipment is provided at both the low and high altitude locations. Optionally, storage yards are provided at both the low and high altitude locations.

[0089] The drive unit 400 is connected to the first steering structure 130 and / or the second steering structure 140 to drive the traction cable 120 to rotate in the first direction, that is, the drive unit 400 can drive the first steering structure 130 and the second steering structure 140 to rotate around the first direction. All transport devices 200 travel under the traction of the traction cable 120, so that multiple energy storage devices 300 can be successively transported to high altitudes along the carrying cable 110, thereby converting electrical energy into gravitational potential energy for storage and realizing the charging function. Specifically, the drive unit 400 is connected to the first steering structure 130, or the drive unit 400 is connected to the second steering structure 140, or the drive unit 400 is connected to both the first steering structure 130 and the second steering structure 140.

[0090] The power generation device 500 is connected to the first steering structure 130 and / or the second steering structure 140. Multiple transport devices 200 carrying energy storage devices 300 travel along the support cable 110 to successively transport the multiple energy storage devices 300 to a low altitude, forming a continuous gravity flow. Simultaneously, the first steering structure 130 and the second steering structure 140 are driven to rotate along the traction cable 120 in a second direction to drive the power generation device 500 to generate electricity, converting the continuous gravity flow into a continuous energy flow, thereby achieving continuous discharge. 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 drive device 400 drives the traction cable 120 to pull the transport device 200 along the support cable 110 via the steering structure, transporting the energy storage devices 300 up and down, 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 achieving continuous charging and discharging.

[0091] Optionally, both the first steering structure 130 and the second steering structure 140 are connected to a bracket. For example, the bracket is connected to the ground, and both the first steering structure 130 and the second steering structure 140 are supported by the bracket.

[0092] The load-bearing cable gravity flow energy storage system described in this embodiment uses paired traction cables 120 to drive the energy storage device 300 to move, and paired load-bearing cables 110 to bear the load of the energy storage device 300. Compared with using a single cable for both load bearing and traction, this system has higher reliability and stability. By circulating the traction cables 120 between the first steering structure 130 and the second steering structure 140, the energy storage device 300 can be transported successively by the transport device 200. This not only improves the system's transport capacity but also provides a continuous gravity flow. The continuous gravity flow can be converted into a continuous energy flow by the power generation device 500, thereby achieving continuous discharge.

[0093] Referring to Figures 1-17, in the optional scheme of this embodiment, the axial direction of the first steering structure 130 and the axial direction of the second steering structure 140 are both parallel to the horizontal direction. This means that both the first steering structure 130 and the second steering structure 140 rotate around an axis parallel to the horizontal direction. Compared to steering structures that rotate around an axis parallel to the vertical direction, the rotation method of the first steering structure 130 and the second steering structure 140 in this embodiment requires less ground space, has simpler terrain requirements, and is easier to install on more sloping terrain. Simultaneously, the smaller installation space facilitates the simultaneous installation of multiple systems, which can increase system capacity and enable high-power energy storage / discharge.

[0094] In one embodiment, the first steering structure 130 and the second steering structure 140 are respectively a steering wheel 150 or a drum 160, that is, the first steering structure 130 is a steering wheel 150 or a drum 160, and the second steering structure 140 is a steering wheel 150 or a drum 160.

[0095] Optionally, as shown in Figures 1-4 and 7, when the first steering structure 130 or the second steering structure 140 is a steering wheel 150, the number of steering wheels 150 located at low altitude or high altitude is the same as the number of traction cables 120. That is, the number of the first steering structure 130, the number of the second steering structure 140 and the number of traction cables 120 are the same. For example, when the number of traction cables 120 is a pair, the number of the first steering structure 130 and the number of the second steering structure 140 are each two.

[0096] The steering wheel 150 is provided with a groove that mates with the traction cable 120; all the steering wheels 150 located at low altitude or high altitude are connected by a coupling, and the drive device 400 or the generator 500 is connected to the coupling respectively, so that the drive device 400 or the generator 500 respectively drive all the steering wheels 150 located at low altitude or high altitude through the coupling, so that all the steering wheels 150 located at low altitude or all the steering wheels 150 located at high altitude rotate synchronously.

[0097] Optionally, as shown in Figures 11-14 and 17, when the first steering structure 130 or the second steering structure 140 is a drum 160, the drum 160 is provided with a number of grooves consistent with the number of all traction cables 120, and the drive device 400 or the generator 500 is respectively connected to the drum shaft of the drum 160. That is, a drum 160 is provided at the low altitude position and configured to be rotatably connected to all traction cables 120; a drum 160 is also provided at the high altitude position and configured to be rotatably connected to all traction cables 120.

[0098] In this embodiment, the first steering structure 130 or the second steering structure 140 passes through a wheel groove to increase the friction between the traction cable 120 and the first steering structure 130 and the second steering structure 140, and also to prevent the traction cable 120 from detaching from the first steering structure 130 and the second steering structure 140.

[0099] In this embodiment, the drive unit 400 can be positioned at a low altitude to drive and connect to the first steering structure 130, or at a high altitude to drive and connect to the second steering structure 140, or the drive unit 400 can be positioned at both low and high altitudes to drive and connect the first steering structure 130 and the second steering structure 140. When the drive unit 400 is located at a high altitude, the load during the energy storage process can be reduced; when located at a low altitude, the installation of the drive unit 400 is facilitated. The specific installation location of the drive unit 400 can be determined according to the site conditions.

[0100] In this embodiment, the power generation device 500 can be installed at a low altitude to drive and connect to the first steering structure 130, or at a high altitude to drive and connect to the second steering structure 140, or the power generation device 500 can be installed at both low and high altitudes to connect to the first steering structure 130 and the second steering structure 140. When the power generation device 500 is located at a high altitude, the load during the energy storage process can be reduced; when located at a low altitude, it facilitates the installation of the power generation device 500. The specific installation location of the power generation device 500 can be determined according to the site conditions.

[0101] In some embodiments, the drive device 400 and the generator 500 can be integrated or separate. Optionally, the drive device 400 and the generator 500 can be electric generators, or the drive device 400 and the generator 500 can be independent of each other. Here, an electric generator (English name: Motor-Generator) in this embodiment refers to a device that can both convert electrical energy into gravitational potential energy as a motor and convert gravitational potential energy into electrical energy as a generator, possessing bidirectional energy conversion capabilities.

[0102] Referring to Figures 1-7 and 11-17, in the optional scheme of this embodiment, each traction cable 120 is looped; the traction cable 120 includes a first traction cable section, a second traction cable section, and two traction engagement sections; the two traction engagement sections engage with the first steering structure 130 and the second steering structure 140 respectively; the two ends of the first traction cable section and the two ends of the second traction cable section are respectively connected to the traction engagement sections to form a loop; that is, the first traction cable section, the traction engagement section, the second traction cable section, and the traction engagement section are connected end to end to form a loop.

[0103] Both the first traction cable section and the second traction cable section include two traction guide sections 122 and one traction tilt section 123; the traction tilt section 123 is connected between the two traction guide sections 122.

[0104] The cable-driven gravity flow energy storage system also includes a traction guide device 126; traction guide devices 126 are installed at both low and high altitudes; a traction inclined section 123 is located between the traction guide devices 126 at the low and high altitudes. The traction inclined section 123 is, for example, located on a hillside between the low and high altitudes. The traction guide device 126 facilitates the guidance of the traction cable 120, allowing it to be guided from an inclined state to a horizontal state, and vice versa. The two traction guide sections 122 facilitate the transfer of the energy storage device 300.

[0105] Referring to Figures 1-7 and 11-17, in an optional 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 sequentially. In this embodiment, the load-bearing cable 110 is in a polygonal shape.

[0106] The load-bearing cable gravity flow energy storage system also includes a load-bearing fixing device 114, a load-bearing support device 115, and a load-bearing guiding device (the load-bearing guiding device is not shown in the figure for the sake of clearer display of other structures); the load-bearing fixing device 114, the load-bearing support device 115, and the load-bearing guiding device are installed at both low and high altitudes.

[0107] The end of each carrying cable 110 passes sequentially through the carrying guide device and the carrying support device 115 and is fixedly connected to the carrying fixing device 114; the carrying fixing section 111 is located between the carrying fixing device 114 and the carrying support device 115, the carrying guide section 112 is located between the carrying support device 115 and the carrying guide device, and the carrying inclined section 113 is located between the carrying guide device at low altitude and the carrying guide device at high altitude; the two carrying guide sections 112 are used to facilitate the transfer of the energy storage device 300 at low altitude and high altitude, and the carrying fixing section 111 is used to fix the end of the carrying cable 110.

[0108] Optionally, the load-bearing fixing device 114 may be anchored or fixed in other ways.

[0109] Optionally, the traction guide section 122 is parallel to the horizontal direction; the parallelism of the traction guide section 122 to the horizontal direction facilitates the transfer of the energy storage device 300.

[0110] Optionally, the load-bearing guide section 112 is parallel to the horizontal direction; the parallelism of the load-bearing guide section 112 to the horizontal direction facilitates the transfer of the energy storage device 300.

[0111] Optionally, the first traction cable is connected to the top of the first steering structure 130, and the second traction cable is connected to the bottom of the first steering structure 130; that is, the first traction cable is connected to the top of the second steering structure 140, and the second traction cable is connected to the bottom of the second steering structure 140. The position of the traction guide section 122 of the first traction cable corresponds to the position of the load-bearing guide section 112, and the position of the traction tilt section 123 of the first traction cable corresponds to the position of the load-bearing tilt section 113. This design helps to improve the stability and accuracy of the transport device 200 during movement.

[0112] Referring to Figures 5, 8, 15 and 18, in the optional embodiment, the transport device 200 includes a transport frame 210, a connecting frame 220, a set of walking wheels 230 and a rope connection structure 240.

[0113] As shown in Figures 5 and 8, when both the first steering structure 130 and the second steering structure 140 are steering wheels 150, the connecting frame 220 is a suspension frame 221, which is rotatably connected to the carrier frame 210; for example, the suspension frame 221 can rotate 360 ​​degrees on the carrier frame 210. Because the suspension frame 221 is rotatably connected to the carrier frame 210, the energy storage device 300 connected to the suspension frame 221 can always be in a suspended state.

[0114] As shown in Figures 15 and 18, when at least one of the first steering structure 130 and the second steering structure 140 is a drum 160, the connecting frame 220 is a support frame 222, which is fixedly connected to the transport frame 210. When the transport device 200 travels along the traction cable 120, when the transport device 200 travels along the first traction cable section (the first traction cable section is connected to the top of the first steering structure 130, which can be understood as the first traction cable section being the upward route of the transport device 200), the energy storage device 300 is connected through the support frame 222 and located above the transport frame 210; when the transport device 200 travels along the second traction cable section (the second traction cable section is connected to the bottom of the first steering structure 130, which can be understood as the second traction cable section being the downward route of the transport device 200), the energy storage device 300 has been unloaded from the support frame 222, and the support frame 222 is located below the transport frame 210.

[0115] In one embodiment, the energy storage device 300 is detachably connected to the connecting frame 220, that is, the energy storage device 300 is detachably connected to the suspension frame 221, or the energy storage device 300 is detachably connected to the support frame 222.

[0116] In one embodiment, at least one pair of walking wheel sets 230 are disposed on both sides of the carrier frame 210; the walking wheel sets 230 are configured to walk on the support cable 110; the number of walking wheel sets 230 is the same as the number of support cables 110.

[0117] In one embodiment, at least one pair of rope connection structures 240 are rotatably connected to both sides of the transport frame 210; the rope connection structure 240 is fixedly connected to the traction cable 120, and the rotation axis of the rope connection structure 240 forms an angle with the extension direction of the traction cable 120. Optionally, the rotation axis of the rope connection structure 240 is perpendicular to the extension direction of the traction cable 120. The rope connection structure 240 is rotatably connected to the transport frame 210 to facilitate the movement of the transport device 200 along the annular traction cable 120. By using paired rope connection structures 240 to connect the transport frame 210, the stability of the transport device 200 during movement is improved. In this embodiment, the number of pairs of rope connection structures 240 can be selected based on factors such as the material and connection strength of the rope connection structures 240.

[0118] Referring to Figures 9, 10, and 19, in the optional embodiment, each traction cable 120 is looped. The rope connection structure 240 can take various forms, such as a claw type or a locking mechanism. 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 jaws 243 of the claw 242 face the centerline of the traction cable 120; by having the jaws 243 of the claw 242 face the centerline of the traction cable 120, the claw 242 can move with the traction cable 120, reducing the rotational interference of the rope connection structure 240 at the first turning structure 130 or the second turning structure 140 when the transport device 200 rotates to the first turning structure 130 or the second turning structure 140, so that the rope connection structure 240 can pass smoothly through the first turning structure 130 or the second turning structure 140.

[0119] The gripper 242 is fixedly connected to the traction cable 120. A transport bearing 244 is connected between the rope connection body 241 and the transport frame 210. The transport bearing 244 reduces the friction between the rope connection body 241 and the transport frame 210, which helps the transport device 200 to rotate at the first steering structure 130 or the second steering structure 140.

[0120] Optionally, the carrier bearing 244 is a sliding bearing. Sliding bearings have high load-bearing capacity, ensuring the continuous transmission of energy storage device 300 by the cable gravity flow energy storage system.

[0121] Referring to Figures 1-19, in the optional embodiment, the walking wheel set 230 includes at least one wheel assembly; when there are multiple wheel assemblies, the multiple wheel assemblies are arranged sequentially along the extension direction of the carrying cable 110; the multiple wheel assemblies enable the carrying cable 110 to better support the transport device 200 and the energy storage device 300 through the walking wheel set 230.

[0122] The wheel assembly includes traveling wheels 231 and wheel connectors 232. In the same wheel assembly, there are at least two traveling wheels 231, and all traveling wheels 231 are sequentially and rotatably connected to the wheel connectors 232 along the extension direction of the load-bearing cable 110. The wheel connectors 232 are pivotally connected to the transport frame 210. The traveling wheels 231 and wheel connectors 232 further enhance the load-bearing capacity and stability of the traveling wheel assembly 230 during travel.

[0123] Optionally, to further improve the load-bearing capacity and stability of the traveling wheel assembly 230 during travel, the wheel assembly also includes a pivot axle 233 and a wheel axle 234 parallel to the pivot axle 233. In the same wheel assembly, there are two wheel connectors 232. The traveling 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 traveling wheel 231, and the traveling wheel 231 is configured to rotate around the wheel axle 234. The pivot axle 233 passes through the two wheel connectors 232 and is connected to the carrier frame 210. The two wheel connectors 232 are configured to swing around the pivot axle 233. The pivot axle 233 is parallel to a third direction and forms an angle with the extension direction of the support cable 110. Optionally, the pivot axle 233 is perpendicular to the extension direction of the support cable 110.

[0124] Referring to Figures 1-19, in an optional embodiment, the transport frame 210 includes a transport frame body 211 and a wheel assembly mounting part 212; the wheel assembly mounting parts 212 are symmetrically connected to both ends of the transport frame body 211 in pairs; the connecting frame 220 is connected to the transport frame body 211, and the walking wheel set 230 is connected to the wheel assembly mounting part 212; by setting the transport frame 210 as a transport frame body 211 and a wheel assembly mounting part 212, it helps the transport frame 210 to support and connect the connecting frame 220, the walking wheel set 230 and the rope connection structure 240.

[0125] As shown in Figures 6-9 and 16-19, at least two sets of wheels 230 are provided on one side of the transport frame 210. These two sets of wheels 230 are located on both sides of the wheel mounting portion 212, and the corresponding pivot shafts 233 of the two sets of wheels 230 are the same pivot shaft 233. The pivot shaft 233 passes through the wheel mounting portion 212 and connects to the corresponding wheel connector 232. By providing at least two sets of wheels 230, the stability of the transport device 200 during travel is improved.

[0126] Optionally, pairs of traveling wheel sets 230 are symmetrically arranged on the transport frame 210; optionally, pairs of bearing cables 110 are symmetrically arranged on both sides of the transport device 200; optionally, pairs of traction cables 120 are symmetrically arranged on both sides of the transport device 200.

[0127] Optionally, the traction cable 120 is located between the paired support cables 110; the support cable 110 is located above the traction cable 120; by positioning the support cable 110 above the traction cable 120, it helps the support cable 110 to support the transport device 200 and the energy storage device 300.

[0128] Optionally, the connecting frame 220 includes at least two connecting rod portions; the connecting rod portions connect the carrier frame 210 and the energy storage device 300. The at least two connecting rod portions enhance the load-bearing capacity and stability of the connecting frame 220 in supporting the energy storage device 300. As shown in Figure 8, when the connecting frame 220 is a suspension frame 221, the suspension frame 221 includes at least two suspension rod portions; the suspension rod portions connect the carrier frame 210 and the energy storage device 300; the at least two suspension rod portions enhance the load-bearing capacity and stability of the suspension frame 221 in supporting the energy storage device 300. As shown in Figure 18, when the connecting frame 220 is a support frame 222, the support frame 222 includes at least two support rod portions; the support rod portions connect the carrier frame 210 and the energy storage device 300; the at least two support rod portions enhance the load-bearing capacity and stability of the support frame 222 in supporting the energy storage device 300.

[0129] In this embodiment, both the load-bearing cable 110 and the traction cable 120 are connected to a tensioning device. The tensioning device includes one or more of a counterweight structure, a hydraulic structure, and a screw-type structure; other structural forms are also possible. The tensioning device increases the preload of the load-bearing cable 110 and the traction cable 120, which helps them operate normally. The tensioning device shown in Figures 3 and 13 is a screw-type structure.

[0130] The load-bearing cable gravity flow energy storage system provided in this embodiment has the following advantages compared with the prior art:

[0131] 1. The energy storage device 300 is driven by paired traction cables 120, and the load-bearing cables 110 bear the load of the energy storage device 300. This effectively reduces the load on a single cableway, ensuring the system's stable and reliable performance and improving its load-bearing capacity. Compared to using a single cable for both load-bearing and traction, this method offers higher reliability and stability. Furthermore, the reduced load on a single cableway means that more energy storage devices 300 can be transported simultaneously, increasing the system's capacity and ensuring high-efficiency operation in both energy storage and power generation modes, enabling high-power energy storage and release.

[0132] 2. The axial directions of both the first steering structure 130 and the second steering structure 140 are parallel to the horizontal direction. This means that both the first steering structure 130 and the second steering structure 140 rotate around an axis parallel to the horizontal direction. Compared to steering structures that rotate around an axis parallel to the vertical direction, the first steering structure 130 and the second steering structure 140 in this embodiment require less ground space, have simpler terrain requirements, and are easier to install on more sloping terrains. Simultaneously, the smaller installation space facilitates the simultaneous installation of multiple systems, increasing system capacity and enabling high-power energy storage / discharge.

[0133] 3. The transport device 200 is fixedly installed on the support cable 110, and the transport device 200 carrying the energy storage device 300 transports the energy storage device 300 along the support cable 110. Compared with the detached installation, the system structure is not only simple, but also avoids the use of components that need to be frequently opened and closed, ensuring the reliability of the system installation and reducing maintenance costs.

[0134] 4. The use of the 110 load-bearing cable as the sliding track avoids heavy steel rails and other components, reduces the difficulty of transportation during system installation, and makes deployment easier.

[0135] 5. The energy storage device 300 conveying system generates a continuous gravity flow, which can form a stable and adjustable energy flow, thereby realizing continuous discharge.

[0136] 6. The real-time power consumption or power generation can be arbitrarily adjusted by changing the speed of gravity flow or the magnitude of gravity flow; the energy storage device 300 has stable and reliable performance, economical storage, and efficient and fast access.

[0137] When the first steering structure 130 or the second steering structure 140 is a drum 160, compared to when the first steering structure 130 or the second steering structure 140 is a steering wheel 150, the drum 160 increases the contact area with the traction cable 120, thereby increasing the friction between the drum 160 and the traction cable 120, and thus improving the charging / discharging efficiency to a certain extent. Furthermore, the drum 160 can provide a more uniform contact force with the traction cable 120, effectively reducing wear on the traction cable 120 and extending its service life. At the same time, the drum 160 is less prone to slippage, which is more beneficial for the stability of the cable-driven gravity flow energy storage system.

[0138] This embodiment also provides an energy storage method applicable to the cable-supported gravity flow energy storage system described in any of the above embodiments. The method includes:

[0139] During energy storage and charging, the energy storage device 300 is located at a low altitude. The drive device 400 is driven by electrical energy, which drives the first steering structure 130 and the second steering structure 140 to rotate in the first direction, thereby driving the traction cable 120 to run in the first direction, and then driving all the transport devices 200 to move under the traction of the traction cable 120; so that multiple energy storage devices 300 are successively assembled on the transport devices 200, and successively transported to a high altitude along the carrying cable 110 and unloaded, thereby converting electrical energy into gravitational potential energy for storage.

[0140] During discharge, the energy storage device 300 is located at a high altitude. Multiple energy storage devices 300 are successively assembled on the carrier device 200 and travel along the carrying cable 110 to a low altitude and are unloaded, driving the traction cable 120 to rotate in the second direction. The traction cable 120 drives the first steering structure 130 and the second steering structure 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, 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.

[0141] The energy storage method provided in this embodiment is applicable to the aforementioned cable-stayed gravity flow energy storage system. The technical features of the disclosed cable-stayed gravity flow energy storage system are also applicable to this energy storage method, and the technical features of the disclosed cable-stayed gravity flow energy storage system will not be repeated. The cable-stayed gravity flow energy storage system described in this embodiment employs the aforementioned energy storage method, and the disclosed energy storage method is also applicable to this cable-stayed gravity flow energy storage system.

[0142] In one embodiment, multiple energy storage devices 300 are sequentially mounted on the transport device 200 at preset intervals to enable continuous transport of the energy storage devices 300. The preset interval may be, for example, one energy storage device 300 is mounted on each transport device 200, or one energy storage device 300 is mounted every other transport device 200, or one energy storage device 300 is mounted every two transport devices 200, etc.

[0143] The energy storage device 300's travel speed and spacing can be adjusted in real time according to demand to change the magnitude of the gravity flow, thereby achieving on-demand energy flow regulation and realizing "slow charging and fast discharging" or "on-demand charging and discharging" functions. The travel speed of the energy storage device 300 can be adjusted, for example, by regulating the speed of the drive 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 magnitude of the gravity flow, the adaptability of the cable-type gravity flow energy storage system is broadened.

[0144] In one embodiment, there are multiple load-bearing gravity flow energy storage systems; multiple load-bearing gravity flow energy storage systems are installed side-by-side in the horizontal direction according to the hillside terrain, and / or, multiple load-bearing gravity flow energy storage systems are stacked vertically according to the hillside terrain. By installing multiple load-bearing gravity flow energy storage systems side-by-side in the horizontal direction according to the hillside terrain, and by stacking multiple load-bearing gravity flow energy storage systems vertically according to the hillside terrain, larger-scale energy storage can be achieved.

[0145] To better understand the cable-supported gravity flow energy storage system and energy storage method described in this embodiment, the following examples are provided:

[0146] Energy Storage Stage: During the energy storage process, when the drive unit 400 and the power generation unit 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. This kinetic energy is then smoothly transferred to the first steering structure 130 and the second steering structure 140, causing them to rotate clockwise. The first steering structure 130 and the second steering structure 140, through the friction between their surfaces and the traction cable 120, drive the traction cable 120 to begin moving. Both the first steering structure 130 and the second steering structure 140 rotate clockwise. As the traction cable 120 continues to move, the transport device 200 clamped to it is pulled forward along the carrying cable 110. The transport device 200 is equipped with a connecting frame 220, which carries the energy storage device 300 located in the lower storage yard, allowing it to move along with the transport device 200. As it approaches the upper storage yard, the energy storage device 300 separates from the connecting frame 220 on the transport device 200. The energy storage device 300 is then sent into the upper storage yard and quickly transported away by a transfer vehicle for storage. Meanwhile, the transport device 200 continues to travel along the towing cable 120 and eventually returns to the lower storage yard to prepare for a new round of energy storage device 300 transport.

[0147] Discharge Phase: During the discharge process, the energy storage device 300 located in the upper storage yard is carried by the transport device 200 along a section of the support cable 110. The energy storage device 300 is fixed by the connecting frame 220 on the transport device 200. Subsequently, under the action of gravity, the energy storage device 300, along with the transport device 200, slides down the support cable 110, releasing its contained energy. The transport device 200, through its clamping force, drives the traction cable 120 to begin moving. The traction cable 120, through the friction between itself and the first steering structure 130 and the second steering structure 140, transmits the motion to the first steering structure 130 and the second steering structure 140, driving them to rotate counterclockwise, and then transmitting the motion to the electric generator. The electric generator enters the power generation mode, converting kinetic energy into electrical energy and inputting it into the power grid. As it approaches the lower storage yard, the energy storage device 300 separates from the connecting frame 220 on the transport device 200. The energy storage device 300 is then transported into the lower storage yard and moved away by a transfer vehicle for storage. Meanwhile, the transport device 200 continues to travel along the towing cable 120. Finally, the transport device 200 returns to the upper storage yard, ready to begin a new round of transporting energy storage devices 300.

[0148] Example of power generation using the cable-stayed gravity flow energy storage system and energy storage method described in this embodiment:

[0149] If both the first steering structure 130 and the second steering structure 140 are steering wheels 150, the energy storage device 300 is mainly made of reinforced concrete with a density of 2500 kg / m³. 3 The device is a cuboid measuring 1.2 meters long, 1.2 meters wide, and 1.0 meter high, weighing 3.6 tons. Assuming a vertical drop of 500 meters on the hillside, lifting a single energy storage device 300 from the bottom (lower elevation) to the top (higher elevation) would allow it to store energy E = mgh = 3.6 × 10⁻⁶. 3 kg×9.8m / s 2 ×500m=17,640,000J=4.9kWh. Referring to the operating speeds of passenger ropeways, freight ropeways, and mine hoists, at a speed of 8 meters per second, the operating speed would be 28.8 kilometers per hour. Assuming the energy storage devices are arranged at 10-meter intervals, 2880 energy storage devices can be transported to the mountaintop per hour, storing 2880 devices × 4.9kWh / device = 14112.0kW·h ≈ 14.1MWh of energy per hour. To improve power generation capacity, multiple systems can be arranged in parallel rows and / or stacked vertically on the hillside; alternatively, the speed of the traction cable can be increased by 120, or the spacing between the energy storage devices can be reduced by 300 to expand the energy storage capacity.

[0150] If both the first steering structure 130 and the second steering structure 140 are drums 160, the energy storage device 300 is mainly made of reinforced concrete with a density of 2500 kg / m³.3 The device is a cuboid measuring 1.2 meters long, 1.2 meters wide, and 1.0 meter high, weighing 3.6 tons. Assuming a vertical drop of 500 meters on the hillside, lifting a single energy storage device 300 from the bottom (lower elevation) to the top (higher elevation) would allow it to store energy E = mgh = 3.6 × 10⁻⁶. 3 kg×9.8m / s 2 ×500m=17,640,000J=4.9kWh. Referring to the operating speeds of passenger ropeways, freight ropeways, and mine hoists, at a speed of 8 meters per second, the operating speed would be 28.8 kilometers per hour. Assuming the energy storage devices are arranged at 8-meter intervals, 3600 energy storage devices can be transported to the mountaintop per hour, storing approximately 17640.0 kW·h ≈ 17.6 MWh of energy per hour (3600 devices × 4.9kWh / device = 17640.0 kW·h ≈ 17.6 MWh). To increase power generation capacity, multiple systems can be arranged in parallel rows and / or stacked vertically on the hillside; alternatively, the speed of the traction cable can be increased by 120 km / h, or the spacing between the energy storage devices can be reduced by 300 km / h, thereby expanding the energy storage capacity.

[0151] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Industrial applicability

[0152] In summary, this application provides a load-bearing cable-driven gravity flow energy storage system and energy storage method. The energy storage device is driven by a pair of traction cables, and the load-bearing cables bear the load of the energy storage device, resulting in higher stability. By circulating the traction cables between the first and second steering structures, the energy storage device can be transported continuously by a transport device. This not only improves the system's transport capacity but also provides a continuous gravity flow. The continuous gravity flow can be converted into a continuous energy flow by a power generation device, thereby achieving continuous charging and discharging.

Claims

1. A cable-supported gravity flow energy storage system, characterized in that, The device includes a first steering structure (130), a second steering structure (140), a transport device (200), an energy storage device (300), a drive device (400), and a power generation device (500). It also includes at least one pair of support cables (110) configured to support the transport device (200) and at least one pair of traction cables (120) configured to traction the transport device (200). The energy storage device (300) is detachably connected to the transport device (200). The traction cable (120) circulates between the first steering structure (130) and the second steering structure (140); wherein the first steering structure (130) is located at a low altitude and the second steering structure (140) is located at a high altitude relative to the low altitude. The drive unit (400) is connected to the first steering structure (130) and / or the second steering structure (140) to drive the traction cable (120) to rotate in a first direction; all the transport devices (200) move under the traction of the traction cable (120) to enable multiple energy storage devices (300) to be successively transported to high altitudes along the carrying cable (110) to convert electrical energy into gravitational potential energy for storage; The power generation device (500) is connected to the first steering structure (130) and / or the second steering structure (140); multiple transport devices (200) carrying the energy storage devices (300) travel along the carrying cable (110) to successively transport the multiple energy storage devices (300) to a low altitude and form a continuous gravity flow, while driving the first steering structure (130) and the second steering structure (140) to rotate along the traction cable (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 realizing continuous discharge; wherein, the first direction is opposite to the second direction.

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

3. The load-bearing cable-type gravity flow energy storage system according to claim 1, characterized in that, The first steering structure (130) and the second steering structure (140) are respectively a steering wheel (150) or a drum (160); When the first steering structure (130) or the second steering structure (140) is a steering wheel (150), the number of steering wheels (150) located at low altitude or high altitude is the same as the number of traction cables (120), and the steering wheel (150) is provided with a wheel groove that cooperates with the traction cable (120); all the steering wheels (150) located at low altitude or high altitude are connected by a coupling, and the drive device (400) or the power generation device (500) is respectively connected to the coupling; When the first steering structure (130) or the second steering structure (140) is a drum (160), the drum (160) is provided with a number of grooves consistent with the number of all the traction cables (120), and the drive device (400) or the power generation device (500) is respectively connected to the drum shaft of the drum (160); Both the first steering structure (130) and the second steering structure (140) are connected to the bracket; The drive device (400) and the power generation device (500) are electric generators, or the drive device (400) and the power generation device (500) are independent of each other.

4. The load-bearing cable-type gravity flow energy storage system according to claim 1, characterized in that, Each of the traction cables (120) is ring-shaped; the traction cable (120) includes a first traction cable section, a second traction cable section, and two traction engagement sections; the two traction engagement sections respectively engage with the first steering structure (130) and the second steering structure (140); the two ends of the first traction cable section and the two ends of the second traction cable section are respectively connected to the traction engagement sections and form a ring; Both the first traction cable section and the second traction cable section include two traction guide sections (122) and one traction tilt section (123); the traction tilt section (123) is connected between the two traction guide sections (122); The load-bearing cable 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 tilt section (123) is located between the low-altitude traction guide device (126) and the high-altitude traction guide device (126).

5. The load-bearing cable-type gravity flow energy storage system according to claim 4, characterized in that, 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); The load-bearing cable gravity flow energy storage system also includes a load-bearing fixing device (114), a load-bearing support device (115), and a load-bearing guiding device; the load-bearing fixing device (114), the load-bearing support device (115), and the load-bearing guiding device are provided at both the low-altitude position and the high-altitude position; The end of each of the bearing cables (110) passes sequentially through the bearing guide device and the bearing support device (115) and is fixedly connected to the bearing fixing device (114); the bearing fixing section (111) is located between the bearing fixing device (114) and the bearing support device (115), the bearing guide section (112) is located between the bearing support device (115) and the bearing guide device, and the bearing inclined section (113) is located between the bearing guide device at the low altitude and the bearing guide device at the high altitude. The 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 cable is connected to the top of the first steering structure (130), and the second traction cable is connected to the bottom of the first steering structure (130); the position of the traction guide section (122) of the first traction cable corresponds to the position of the bearing guide section (112), and the position of the traction tilt section (123) of the first traction cable corresponds to the position of the bearing tilt section (113).

6. The load-bearing cable-type gravity flow energy storage system according to claim 1, characterized in that, The transport device (200) includes a transport frame (210), a connecting frame (220), a set of wheels (230), and a rope connection structure (240); When both the first steering structure (130) and the second steering structure (140) are steering wheels (150), the connecting frame (220) is a suspension frame (221), and the suspension frame (221) is rotatably connected to the transport frame (210); when at least one of the first steering structure (130) and the second steering structure (140) is a drum (160), the connecting frame (220) is a support frame (222), and the support frame (222) is fixedly connected to the transport frame (210); The energy storage device (300) can be detachably connected to the connecting frame (220); At least one pair of the traveling wheel sets (230) are disposed on both sides of the transport frame (210); the traveling wheel sets (230) are configured to travel on the support cable (110); the number of the traveling wheel sets (230) is the same as the number of the support cables (110); At least one pair of the rope connection structures (240) are rotatably connected to both sides of the transport frame (210); the rope connection structure (240) is fixedly connected to the traction cable (120), and the rotation axis of the rope connection structure (240) has an angle with the extension direction of the traction cable (120).

7. The load-bearing cable-type gravity flow energy storage system according to claim 6, characterized in that, Each of the aforementioned traction cables (120) is in the form of a ring; The rope connection structure (240) includes a rope connection body (241) and a gripper (242); the gripper (242) is fixedly connected to the end of the rope connection body (241), and the jaws (243) of the gripper (242) face the center line of the traction cable (120); The gripper (242) is fixedly connected to the traction cable (120); A transport bearing (244) is connected between the rope connecting body (241) and the transport frame (210).

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

9. The load-bearing cable-type gravity flow energy storage system according to claim 8, characterized in that, The wheel assembly also includes a pivot shaft (233) and a wheel axle (234) parallel to the pivot shaft (233); In the same wheel assembly, there are two wheel connectors (232), and the traveling 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 traveling wheel (231), and the traveling wheel (231) is configured to rotate about the wheel axle (234). The pivot shaft (233) passes through the two wheel connectors (232) and is connected to the carrier frame (210). The two wheel connectors (232) are configured to swing about the pivot shaft (233), which is parallel to the third direction and has an angle with the extension direction of the support cable (110).

10. The load-bearing cable-type gravity flow energy storage system according to claim 9, characterized in that, The transport frame (210) includes a transport frame body (211) and a wheel assembly mounting part (212); the wheel assembly mounting parts (212) are arranged in pairs and symmetrically connected to both ends of the transport frame body (211); the connecting frame (220) is connected to the transport frame body (211), and the walking wheel assembly (230) is connected to the wheel assembly mounting part (212); The carrier frame (210) has at least two sets of walking wheels (230) on one side, wherein the two sets of walking wheels (230) are located on both sides of the wheel assembly mounting part (212), and the pivot shafts (233) corresponding to the two sets of walking wheels (230) are the same pivot shaft (233); the pivot shaft (233) passes through the wheel assembly mounting part (212) and is connected to the corresponding wheel connector (232).

11. The load-bearing cable-type gravity flow energy storage system according to claim 6, characterized in that, The paired sets of walking wheels (230) are symmetrically arranged on the carrier frame (210); the paired load-bearing cables (110) are symmetrically arranged on both sides of the carrier device (200); the paired traction cables (120) are symmetrically arranged on both sides of the carrier device (200); The traction cable (120) is located between the paired support cables (110); the support cable (110) is located above the traction cable (120); The connecting frame (220) includes at least two connecting rods; the connecting rods are connected between the carrier frame (210) and the energy storage device (300).

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

13. The load-bearing cable-type gravity flow energy storage system according to claim 1, characterized in that, The load-bearing cable gravity flow energy storage system further includes a transfer device and a storage yard configured to store the energy storage device (300); the transfer device and the 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 transport device (200) via the transfer device.

14. An energy storage method, characterized in that, The method employs a cable-stayed gravity flow energy storage system as described in any one of claims 1-13; the method includes: During energy storage and charging, the energy storage device (300) is located at a low altitude. The drive device (400) is driven by electrical energy, which drives the first steering structure (130) and the second steering structure (140) to rotate in a first direction, thereby driving the traction cable (120) to run in the first direction, and then driving all the transport devices (200) to walk under the traction of the traction cable (120). Multiple energy storage devices (300) are successively assembled on the transport devices (200), and successively transported to a high altitude along the carrying cable (110) and unloaded, thereby converting electrical energy into gravitational potential energy for storage. During discharge, the energy storage device (300) is located at a high altitude. Multiple energy storage devices (300) are successively assembled on the transport device (200) and travel along the carrying cable (110) to a low altitude and are unloaded, driving the traction cable (120) to rotate in the second direction. The traction cable (120) drives the first steering structure (130) and the second steering structure (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, Multiple energy storage devices (300) are assembled one by one on the transport device (200) at a preset interval so that the energy storage devices (300) can be transported continuously; The speed and spacing of the energy storage device (300) can be adjusted in real time according to demand to change the magnitude of the gravity flow, thereby achieving on-demand adjustment of energy flow and realizing the functions of "slow charging and fast discharging" or "on-demand charging and discharging".

16. The energy storage method according to claim 14, characterized in that, The number of the cable-type gravity flow energy storage systems is multiple; Multiple load-bearing cable-stayed gravity flow energy storage systems may be installed side-by-side in the horizontal direction according to the hillside topography, and / or multiple load-bearing cable-stayed gravity flow energy storage systems may be stacked vertically according to the hillside topography.

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