Vertical lifting gravity flow energy storage system and energy storage method

Abstract

A vertical lifting gravity flow energy storage system and energy storage method relate to the field of gravity energy storage technology; the vertical lifting gravity flow energy storage system includes at least one vertical lifting unit, an energy storage device, a driving device, a power generation device and a stacking yard; the driving device is connected to the vertical lifting unit to drive multiple energy storage devices to continuously lift vertically to convert electrical energy into gravitational potential energy storage; multiple energy storage devices move downward under the action of gravity to form a continuous gravity flow to convert the continuous gravity flow into a continuous energy flow, thereby achieving continuous discharge. The energy storage method is applicable to a vertical lifting gravity flow energy storage system. The present invention provides a vertical lifting gravity flow energy storage system and energy storage method to solve the technical problems existing in the prior art of using a wire rope winding / friction method to lift a single energy storage block to generate intermittent loads, or using a chain structure as the main carrier of the energy storage block to limit the carrying capacity and reduce the effective load.

Description

Technical Field

[0001] The present invention relates to the technical field of gravity energy storage, and in particular to a vertical lifting gravity flow energy storage system and an energy storage method. Background Art

[0002] Although the existing vertical lifting energy storage system has verified the feasibility of the technology, the following technical problems still exist: one type of vertical lifting energy storage system uses a wire rope winding / friction lifting device to lift individual energy storage blocks one by one, but the successive lifting of the energy storage blocks generates intermittent loads, which can easily lead to discontinuous charging and discharging; the other type uses a chain structure as the main carrier of the energy storage blocks, but the mechanical strength of the chain structure limits its carrying capacity, and the chain structure has a large deadweight, which to a certain extent reduces the effective load of the lifting energy storage blocks, thereby limiting the efficiency of power generation. Summary of the Invention

[0003] The purpose of the present invention is to provide a vertical lifting gravity flow energy storage system and energy storage method, so as to solve, to a certain extent, the technical problems existing in the prior art of using wire rope winding / friction to lift a single energy storage block, resulting in intermittent load, or using a chain structure as the main carrying device of the energy storage block, which limits the carrying capacity and reduces the effective load.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A vertical lifting gravity flow energy storage system comprises at least one vertical lifting unit, an energy storage device, a driving device, a power generation device and a storage yard for storing the energy storage device;

[0006] Each of the vertical lifting units includes a carrying rope, a first steering structure, a second steering structure, and a carrying device; in a single vertical lifting unit, the second steering structure is located above the first steering structure, the carrying rope circulates between the first steering structure and the second steering structure, and a plurality of the carrying devices are fixedly connected to the carrying rope; the first steering structure is located at a low altitude position, and the second steering structure is located at a high altitude position; the stacking yard is provided at both the low altitude position and the high altitude position;

[0007] The same energy storage device is detachably connected to the corresponding carrying devices of all the vertical lifting units;

[0008] The driving device is connected to the vertical lifting unit to drive the carrying ropes of all the vertical lifting units to operate synchronously, thereby driving all the carrying devices to operate, thereby continuously vertically lifting the multiple energy storage devices stored in the storage yard at a low altitude to convert electrical energy into gravitational potential energy for storage;

[0009] The power generation device is connected to the vertical lifting unit; the multiple energy storage devices stored in the stacking yard at a high altitude move downward continuously under the action of gravity to form a continuous gravity flow, and at the same time drive the corresponding carrying devices to move downward, thereby driving the carrying ropes of all the vertical lifting units to operate synchronously, and then driving the power generation device to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby realizing continuous discharge.

[0010] Optionally, the number of the vertical lifting unit is one, and the vertical lifting unit includes at least two carrying ropes;

[0011] Alternatively, the number of the vertical lifting units is two, and the two vertical lifting units are located on both sides of the same energy storage device; the running directions of the carrying ropes of the two vertical lifting units are opposite; a single vertical lifting unit includes at least two carrying ropes; and the carrying devices of the two vertical lifting units are arranged at intervals;

[0012] All the carrying ropes are arranged in parallel.

[0013] Optionally, in a single vertical lifting unit, the carrying device includes a carrying frame, a connecting frame, an energy storage connecting device and a rope connecting structure; the carrying device has a first direction, a second direction and a third direction that intersect with each other;

[0014] The carrying frame includes at least two small carrying frames, all of which are sequentially spaced apart along the first direction, and each of the small carrying frames is connected to at least two rope connection structures arranged along the second direction, and the rope connection structures are fixedly connected to the carrying rope;

[0015] Along the third direction, the connecting frame and the carrying rope are respectively located on both sides of the carrying frame; each of the carrying small frames is respectively connected to the connecting frame, and the energy storage connection device is connected to the connecting frame;

[0016] The energy storage device is detachably connected to the energy storage connection device.

[0017] Optionally, there are two carrying racks, namely a first carrying rack and a second carrying rack; the rope connection structures on the first carrying rack, the rope connection structures on the second carrying rack, and the carrying ropes are of the same number; along the first direction, the rope connection structures on the first carrying rack and the rope connection structures on the second carrying rack are respectively fixedly connected to the corresponding carrying ropes;

[0018] The energy storage connection device includes a suspension device for suspending the energy storage device; the connecting frame includes a support rod, a pull rod and a connecting shaft; the first end of the pull rod is pivotally connected to the first carrier frame, the first end of the support rod is pivotally connected to the second carrier frame, and the second end of the support rod is pin-connected to the second end of the pull rod, so that the support rod and the pull rod form an angle rod structure; the number of the angle rod structures is multiple, and the multiple angle rod structures are sequentially spaced along the second direction; the connecting shaft is connected to all the angle rod structures; the suspension device is rotatably connected to the connecting shaft;

[0019] Alternatively, the energy storage connection device includes a fixed connection device; the connecting frame includes a pull rod and a connecting support rod; the first end of the pull rod is pivoted to the first transport frame, and the corresponding second end is pivoted to the connecting support rod; the first end of the connecting support rod is fixedly connected to the second transport frame, and the corresponding second end is connected to the fixed connection device; the second end of the pull rod is located between the first end and the second end of the connecting support rod; the fixed connection device and / or the connecting support rod support and connect the energy storage device so that the energy storage device is located above the connecting support rod.

[0020] Optionally, when the energy storage connection device includes a fixed connection device, the connecting frame further includes a reinforcement rod; a first end of the reinforcement rod is fixedly connected to the second carrying frame, and a corresponding second end is connected to the connecting support rod; the fixed connection device, the second end of the reinforcement rod, the second end of the pull rod and the first end of the connecting support rod are arranged in sequence along the axial direction of the connecting support rod;

[0021] When there are two vertical lifting units, the fixed connection devices of the two vertical lifting units are respectively connected to the corresponding two ends of the energy storage device.

[0022] Optionally, the pull rod includes two pull rod portions; the two pull rod portions are of the same length and are hinged to each other; a plane formed by the first carrying frame and the second carrying frame can form a right triangle with the pull rod, the support rod or the connecting rod in the first direction;

[0023] When the energy storage connection device includes a suspension device, the length of the support rod is a, and the angle between the pull rod and the support rod is α; or when the energy storage connection device includes a fixed connection device, the length between the second end of the pull rod and the first end of the connecting rod is a, and the angle between the pull rod and the connecting rod is α; then the length of the pull rod is a / cosα, and the vertical distance between the centers of the first and second carrying racks is y: y=a·tanα;

[0024] The radius of the first steering structure and the second steering structure are both r. When the carrier runs to the first steering structure or the second steering structure, the central angle corresponding to y is 2β, and the angle between the pull rod portion and the tangent line of the outer circumferential surface of the first steering structure or the second steering structure is θ;

[0025] ;

[0026] If 90°<θ, then y is greater than

[0027] .

[0028] Optionally, the pull rod comprises at least two pull rod parts, and the plurality of pull rod parts are hinged in sequence;

[0029] When the energy storage connection device includes a suspension device, the hinge axes of all the pull rod parts, the pin connection axes of the support rod and the pull rod, the pivot axis of the pull rod and the first carrier frame, and the pivot axis of the support rod and the second carrier frame are parallel; the connecting axis is the pin connection axis of the support rod and the pull rod;

[0030] Alternatively, when the energy storage connection device includes a fixed connection device, the hinge axes of all the pull rod parts, the pivot axes between the connecting rod and the pull rod, and the pivot axes between the pull rod and the first transport frame are parallel.

[0031] Optionally, the pull rod includes two pull rod parts;

[0032] When the first small carrying rack is parallel to the second small carrying rack, the plane where the first small carrying rack and the second small carrying rack are located is perpendicular to the support rod or the connecting rod.

[0033] Optionally, the rope connection structure includes a rope clamp, a locking member and a fastener; the rope clamp includes a fixedly connected end portion and a screw portion;

[0034] At least one of the end of the cable clamp and the locking member has a cable groove for accommodating the carrying cable;

[0035] The locking member, the fastener, the carrying frame and the fastener are sequentially sleeved on the screw portion of the rope clamp; the fastener between the locking member and the carrying frame is used to clamp the locking member and the rope clamp and fix the carrying rope; the fastener on the side of the carrying frame away from the locking member is used to fasten the rope connecting structure to the carrying frame.

[0036] Optionally, the end of the cable clamp includes a straight portion and a transition portion;

[0037] Along the axial direction of the cable groove, both ends of the straight portion are fixedly connected to the transition portion; the outer diameter of the transition portion gradually decreases, and the large diameter end of the transition portion is connected to the straight portion, and the outer diameter of the straight portion is constant;

[0038] The cable clamping member and the locking member are both provided with cable grooves;

[0039] The cable groove passes through the straight portion and the transition portion.

[0040] Optionally, the driving device is connected to the first steering structure and / or the second steering structure to drive the carrying rope to operate;

[0041] The power generation device is connected to the first steering structure and / or the second steering structure;

[0042] The axial direction of the first steering structure and the axial direction of the second steering structure are both parallel to the horizontal direction;

[0043] The first steering structure and the second steering structure are steering wheels or drums respectively;

[0044] When the first steering structure or the second steering structure is a steering wheel, the number of the steering wheels of the first steering structure or the second steering structure is the same as the number of the carrying ropes, and the steering wheels are provided with wheel grooves that cooperate with the carrying ropes; all the steering wheels of the first steering structure or the second steering structure are connected by a coupling, and the driving device or the power generation device is respectively connected to the coupling;

[0045] When the first steering structure or the second steering structure is a drum, the drum is provided with wheel grooves having the same number as all the carrying ropes, and the driving device or the power generation device is respectively connected to the drum shaft of the drum;

[0046] The first steering structure and the second steering structure are both connected to a support;

[0047] The driving device and the power generation device are motor generators, or the driving device and the power generation device are independent of each other.

[0048] Optionally, there are two vertical lifting units, and the two vertical lifting units are connected to the corresponding driving device in common, or the two vertical lifting units are each connected to a different driving device; the two vertical lifting units are connected to the corresponding power generation device in common, or the two vertical lifting units are each connected to a different power generation device;

[0049] In a single vertical lifting unit, the number of the carrying cables is two, and the carrying cables and the energy storage device are located on both sides of the carrying device;

[0050] The vertical lifting gravity flow energy storage system also includes a transfer device; the transfer device is provided at both the low altitude position and the high altitude position; the energy storage device is transported back and forth between the storage yard and the transport device via the transfer device.

[0051] Optionally, the vertical lifting gravity flow energy storage system further comprises a guide device for guiding the carrying device to move; the guide device is annular;

[0052] Along the second direction, two ends of the transport frame are provided with guide rail grooves that cooperate with the guide device, and the guide rail grooves are open at both ends along the first direction; in the second direction, the cross-section of the guide rail groove is T-shaped, and the third opening of the guide rail groove is located on a side away from the center of the transport frame; a portion of the guide device extends out of the third opening of the guide rail groove and is used to be fixed to the building;

[0053] The guide device adopts a T-shaped profile;

[0054] The two ends of the transport frame are fixedly connected to the guide sleeves, and the guide rail groove is arranged in the guide sleeves; the third opening of the guide rail groove is arranged at the end of the guide sleeve away from the transport frame;

[0055] There are two guide devices, and all the carrying ropes are located between the two guide devices;

[0056] A rolling body is provided between the guide device and the carrier device; the rolling body is located inside the carrier device, and the rolling body is located on at least one corresponding matching surface of the carrier device and the guide device.

[0057] An energy storage method, applicable to the above-mentioned vertical lift gravity flow energy storage system; the method comprises:

[0058] During energy storage charging, the energy storage device is located at a low-altitude storage yard, and the driving device is driven by electric energy to rotate the first steering structure and the second steering structure of all the vertical lifting units, thereby driving the carrying ropes to operate, and further driving all the carrying devices to move under the traction of the carrying ropes; multiple energy storage devices are continuously assembled on the carrying devices, continuously transported to a high altitude and unloaded, thereby converting electric energy into gravitational potential energy for storage;

[0059] During discharge, the energy storage device is located in a storage yard at a high altitude, and multiple energy storage devices are continuously assembled on the carrying device. Under the action of gravity, they move to a low altitude and are unloaded, while driving the carrying rope to operate; the carrying rope drives the first steering structure and the second steering structure of all the vertical lifting units to operate, so as to drive the power generation device to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy.

[0060] Optionally, a plurality of the energy storage devices are assembled one by one on the carrying device at a preset interval so that the energy storage devices are carried continuously;

[0061] 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.

[0062] Optionally, there are multiple vertical lift gravity flow energy storage systems;

[0063] A plurality of the vertical lifting gravity flow energy storage systems are installed in parallel in the horizontal direction according to the vertical structure terrain.

[0064] The beneficial effects of the present invention are mainly:

[0065] The vertical lifting gravity flow energy storage system and energy storage method provided by the present invention can pull and carry the carrying device to move through the carrying ropes of all vertical lifting units, and then pull and carry the energy storage device to move, thereby effectively improving the stability and safety of the energy storage device during movement; compared with the chain structure, the carrying rope has a stronger carrying capacity and relatively smaller dead weight, which effectively improves the carrying capacity and load utilization rate of the vertical lifting gravity flow energy storage system; compared with the intermittent lifting of a single energy storage device by a wire rope winding / friction lifting structure, the vertical lifting gravity flow energy storage system circulates the carrying rope between the first steering structure and the second steering structure, and can drive the carrying device to continuously transport multiple energy storage devices through a driving device, which not only improves the system's carrying capacity, but also provides a continuous gravity flow, and can convert the continuous gravity flow into a continuous energy flow through a power generation device, thereby realizing continuous discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0067] Figure 1A schematic diagram of the first structure of a vertical lifting gravity flow energy storage system provided by an embodiment of the present invention;

[0068] Figure 2 and Figure 3 for Figure 1 A partial enlarged view of the vertical lifting gravity flow energy storage system shown;

[0069] Figure 4 for Figure 1 A partial enlarged view of area A of the vertical lifting gravity flow energy storage system shown;

[0070] Figure 5 for Figure 1 A schematic structural diagram of the second steering structure, drive device and power generation device shown;

[0071] Figure 6 for Figure 1 The schematic structural diagram of the carrier shown;

[0072] Figure 7 for Figure 6 Another perspective structural diagram of the carrier shown;

[0073] Figure 8 for Figure 6 A schematic structural diagram of the rope connection structure shown;

[0074] Figure 9 A second structural schematic diagram of a vertical lifting gravity flow energy storage system provided by an embodiment of the present invention;

[0075] Figure 10 and Figure 11 for Figure 9 A partial enlarged view of the vertical lifting gravity flow energy storage system shown;

[0076] Figure 12 for Figure 9 A schematic structural diagram of the second steering structure, drive device and power generation device shown;

[0077] Figure 13 A third structural schematic diagram of a vertical lifting gravity flow energy storage system provided by an embodiment of the present invention;

[0078] Figure 14 and Figure 15 for Figure 13 A partial enlarged view of the vertical lifting gravity flow energy storage system shown;

[0079] Figure 16 for Figure 13 A partial enlarged view of area B of the vertical lifting gravity flow energy storage system shown;

[0080] Figure 17 for Figure 13 The schematic structural diagram of the carrier shown;

[0081] Figure 18 for Figure 17 A schematic structural diagram of the carrier shown in another perspective.

[0082] Icons: 110-guide device; 120-carrying rope; 130-first steering structure; 140-second steering structure; 150-steering wheel; 160-reel; 200-carrying device; 210-carrying frame; 211-first carrying frame; 212-second carrying frame; 213-guide rail groove; 214-guide sleeve; 220-connecting frame; 221-support rod; 222-pull rod; 223-connecting shaft; 224-connecting support rod; 225-reinforcement rod; 230-suspension device; 240-rope connecting structure; 241-cable clamp; 2411-cable groove; 2412-straight part; 2413-transition part; 242-locking part; 243-fastener; 250-fixed connection device; 300-energy storage device; 400-driving device; 500-power generation device; 600-transfer equipment. DETAILED DESCRIPTION

[0083] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only 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 herein can be arranged and designed in various different configurations.

[0084] 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 as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0085] 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, it does not need to be further defined or explained in subsequent drawings.

[0086] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0087] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0088] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0089] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0090] Example

[0091] This embodiment provides a vertical lift gravity flow energy storage system and energy storage method, which can be used to store electrical energy, especially unstable electrical energy generated by power generation technologies such as wind power and photovoltaic power generation, and can also be used to generate continuous discharge.

[0092] See also Figures 1-18 As shown, the vertical lifting gravity flow energy storage system includes at least one vertical lifting unit, an energy storage device 300, a driving device 400 and a power generation device 500. Optionally, the vertical lifting gravity flow energy storage system further includes a storage yard for storing the energy storage device 300.

[0093] Each vertical lifting unit includes a carrying rope 120, a first steering structure 130, a second steering structure 140 and a carrying device 200; in a single vertical lifting unit, the second steering structure 140 is located above the first steering structure 130, the carrying rope 120 circulates between the first steering structure 130 and the second steering structure 140, and a plurality of carrying devices 200 are fixedly connected to the carrying rope 120. For example, the second steering structure 140 is located directly above the first steering structure 130 or in a position similar to directly above. For example, the first steering structure 130 is located at a low altitude position, and the second steering structure 140 is located at a high altitude position opposite to the low altitude position. In this embodiment, the altitude of the high altitude position is higher than the altitude of the low altitude position. In one embodiment, both the low altitude position and the high altitude position are provided with a stacking yard. In one embodiment, the vertical lifting gravity flow energy storage system also includes a transfer device 600; the transfer device 600 is set at both the low altitude and high altitude positions; the energy storage device 300 is transported back and forth between the storage yard and the carrier 200 through the transfer device 600 to achieve charging, energy storage and discharge.

[0094] The same energy storage device 300 is detachably connected to the corresponding carrying devices 200 of all vertical lifting units; that is, the energy storage device 300 is supported and connected by the carrying devices 200 of all vertical lifting units to continuously transport multiple energy storage devices 300 to high altitudes or low altitudes to achieve charging, energy storage and discharging.

[0095] The drive device 400 is connected to the vertical lifting unit so as to be able to drive the carrying ropes 120 of all vertical lifting units to operate synchronously, thereby driving all carrying devices 200 to operate, thereby continuously vertically lifting multiple energy storage devices 300 stored in the low-altitude storage yard to convert electrical energy into gravitational potential energy storage, thereby realizing the charging function. Optionally, the drive device 400 is connected to the first steering structure 130 and / or the second steering structure 140 to be able to drive the carrying ropes 120 to operate. The drive device 400 is connected to the first steering structure 130 and / or the second steering structure 140, specifically, the drive device 400 is connected to the first steering structure 130, or the drive device 400 is connected to the second steering structure 140, or the drive device 400 is connected to the first steering structure 130 and the second steering structure 140. Alternatively, when there are two or more vertical lifting units, at least two vertical lifting units are connected to a corresponding drive device 400. For example, the drive device can simultaneously drive the first deflection structures 130 or the second deflection structures 140 of at least two vertical lifting units to operate synchronously. Alternatively, each vertical lifting unit is connected to a different drive device 400. For example, the first deflection structure 130 or the second deflection structure 140 of each vertical lifting unit is connected to its own drive device 400, so that the carrying ropes 120 of all vertical lifting units operate synchronously. Alternatively, when there are two vertical lifting units, both vertical lifting units are connected to a corresponding drive device 400. For example, the drive device can simultaneously drive the first deflection structures 130 or the second deflection structures 140 of the two vertical lifting units to operate synchronously. Alternatively, each vertical lifting unit is connected to a different drive device 400. For example, the first deflection structure 130 or the second deflection structure 140 of each vertical lifting unit is connected to its own drive device 400, so that the carrying ropes 120 of the two vertical lifting units operate synchronously.

[0096] The power generation device 500 is connected to the vertical lifting unit; multiple energy storage devices 300 stored in the high-altitude storage yard continuously move downward under the action of gravity to form a continuous gravity flow, while driving the corresponding carrier devices 200 to move downward, thereby driving the carrier cables 120 of all vertical lifting units to operate synchronously, and then driving the power generation device 500 to generate electricity, thereby converting the continuous gravity flow into a continuous energy flow, thereby achieving continuous discharge. Optionally, the power generation device 500 is connected to the first steering structure 130 and / or the second steering structure 140, specifically, the power generation device 500 is connected to the first steering structure 130, or the power generation device 500 is connected to the second steering structure 140, or the power generation device 500 is connected to the first steering structure 130 and the second steering structure 140. Optionally, when there are two or more vertical lifting units, at least two vertical lifting units are connected to the corresponding power generation device 500. For example, the power generation device 500 can be simultaneously connected to the first steering structure 130 or the second steering structure 140 of at least two vertical lifting units. Alternatively, each vertical lifting unit is connected to a different power generation device 500. For example, the first steering structure 130 or the second steering structure 140 of each vertical lifting unit is connected to its own power generation device 500. Optionally, when there are two vertical lifting units, both vertical lifting units are connected to the corresponding power generation device 500. For example, the power generation device 500 can be simultaneously connected to the first steering structure 130 or the second steering structure 140 of both vertical lifting units. Alternatively, both vertical lifting units are connected to a different power generation device 500. For example, the first steering structure 130 or the second steering structure 140 of each vertical lifting unit is connected to its own power generation device 500.

[0097] Optionally, the number of the vertical lifting units is one or more.

[0098] Optionally, when there are two vertical lifting units, the two vertical lifting units are located on either side of the same energy storage device 300; the carrying cables 120 of the two vertical lifting units operate in opposite directions. Placing the two vertical lifting units on either side of the same energy storage device 300 improves the stability of the energy storage device 300 during lifting, thereby ensuring the operational stability of the vertical lift gravity flow energy storage system to a certain extent. Optionally, the carrying devices 200 of the two vertical lifting units are spaced apart to prevent interference between the carrying devices 200 of the two vertical lifting units during operation.

[0099] Optionally, a single vertical lifting unit includes at least two carrying ropes 120; for example, in some embodiments, in a single vertical lifting unit, the number of carrying ropes 120 is two, and the carrying ropes 120 and the energy storage device 300 are located on both sides of the carrying device 200; by arranging the carrying ropes 120 and the energy storage device 300 on both sides of the carrying device 200, the stability of the operation of the vertical lifting gravity flow energy storage system is guaranteed to a certain extent.

[0100] Optionally, all the carrying cables 120 are arranged in parallel.

[0101] Optionally, the first steering structure 130 and the second steering structure 140 are both connected to a support, such as the support is connected to the ground, a building, etc., and the first steering structure 130 and the second steering structure 140 are both supported by the support.

[0102] The vertical lifting gravity flow energy storage system described in this embodiment uses the carrying ropes 120 of all vertical lifting units to pull and carry the carrying device 200 for movement, and can further pull and carry the energy storage device 300 for movement, effectively improving the stability and safety of the energy storage device 300 during movement; compared with the chain structure, the carrying rope 120 has a stronger carrying capacity and relatively smaller dead weight, which effectively improves the carrying capacity and load utilization of the vertical lifting gravity flow energy storage system; compared with the intermittent lifting of a single energy storage device by a wire rope winding / friction lifting structure, this vertical lifting gravity flow energy storage system circulates between the first steering structure 130 and the second steering structure 140 through the carrying rope 120, and can drive the carrying device 200 through the driving device 400 to continuously transport multiple energy storage devices 300, which not only improves the system's carrying capacity but also provides a continuous gravity flow, which can be converted into a continuous energy flow through the power generation device 500, thereby achieving continuous discharge.

[0103] See also Figure 6 、 Figure 7 、 Figure 17 and Figure 18 As shown, in an alternative embodiment of this embodiment, in a single vertical lifting unit, a carrier 200 includes a carrier frame 210, a connecting frame 220, an energy storage connection device, and a rope connection structure 240. The carrier 200 has a first direction, a second direction, and a third direction that intersect with each other. The first direction is, for example, a vertical direction, and the second direction is, for example, parallel to the axial direction of the first steering structure 130 and the axial direction of the second steering structure 140. Optionally, the first direction, the second direction, and the third direction are mutually perpendicular.

[0104] In a single vertical lifting unit, the carrier rack 210 includes at least two small carrier racks, all of which are sequentially spaced apart along a first direction, and each carrier rack is connected to a carrying rope 120 via a rope connection structure 240. For example, each carrier rack is connected to at least two rope connection structures 240 arranged along a second direction, and the rope connection structures 240 are fixedly connected to the carrying rope 120. Accordingly, in a single vertical lifting unit, there are multiple carrying ropes 120; along the first direction, the rope connection structures 240 corresponding to at least some of the small carrier racks are connected to the same carrying rope 120; optionally, along the first direction, the rope connection structures 240 corresponding to all of the small carrier racks are connected to the same carrying rope 120.

[0105] In a single vertical lift unit, along the third direction, the connecting frame 220 and the carrying cable 120 are located on either side of the carrying frame 210. Each small carrying frame is connected to the connecting frame 220, and the energy storage connection device is connected to the connecting frame 220. The energy storage device 300 is detachably connected to the energy storage connection device. In other words, the carrying cable 120 and the energy storage device 300 are located on either side of the carrying device 200. By locating the connecting frame 220 and the carrying cable 120 on either side of the carrying frame 210, interference between the energy storage device 300 and the carrying cable 120 during movement is effectively avoided, thereby ensuring the stability of the vertical lift gravity flow energy storage system.

[0106] Optionally, in a single vertical lifting unit, there are two carrying racks, namely a first carrying rack 211 and a second carrying rack 212. The rope connection structures 240 on the first carrying rack 211 and the rope connection structures 240 on the second carrying rack 212 are the same in number as the carrying ropes 120; and along the first direction, the rope connection structures 240 on the first carrying rack 211 and the rope connection structures 240 on the second carrying rack 212 are respectively fixedly connected to the corresponding carrying ropes 120.

[0107] In this embodiment, the energy storage device 300 can be suspended from the carrier 200 or supported by the carrier 200. For example, when the energy storage device 300 is suspended from the carrier 200, the energy storage connection device includes the suspension device 230; for another example, when the energy storage device 300 is supported by the carrier 200, the energy storage connection device includes the fixed connection device 250.

[0108] For example, see Figure 17 and Figure 18Specifically, the energy storage connection device includes a suspension device 230 for suspending the energy storage device 300; the connecting frame 220 includes a support rod 221, a pull rod 222, and a connecting shaft 223; the first end of the pull rod 222 is pivotally connected to the first carrier frame 211, the first end of the support rod 221 is pivotally connected to the second carrier frame 212, and the second end of the support rod 221 is pinned to the first end of the pull rod 222, so that the support rod 221 and the pull rod 222 form a corner bar structure; there are multiple corner bar structures, and the multiple corner bar structures are sequentially spaced along the second direction; the connecting shaft 223 connects all the corner bar structures. The connecting shaft 223 and the multiple corner bar structures improve the load-bearing capacity and load-bearing strength of the connecting frame 220. Optionally, the number of corner bar structures can be, for example, 3, 5, 6, or 8; the specific number of corner bar structures can be determined based on factors such as the mass of the energy storage device 300 and the load-bearing capacity of the support rod 221 and the pull rod 222. In some embodiments, the suspension device 230 is rotatably connected to the connecting shaft 223 and is used to suspend the energy storage device 300. Suspending the energy storage device 300 from the suspension device 230 helps maintain the balance of the carrier 200, allowing for more stable transport of the energy storage device 300. The first and second ends of the pull rod 222 correspond to each other, and the first and second ends of the support rod 221 correspond to each other.

[0109] The vertical lifting gravity flow energy storage system described in this embodiment adopts a first carrier frame 211, a second carrier frame 212, a support rod 221, a pull rod 222 and a connecting shaft 223 to form a triangular structure, which helps to improve the stability of the carrier device 200 and the energy storage device 300 during movement, and also helps to improve the carrying capacity of the carrier device 200; the support rod 221 is pinned to the pull rod 222, the pull rod 222 is pivoted to the first carrier frame 211, and the support rod 221 is pivoted to the second carrier frame 212, so that the carrier device 200 can pass through the first steering structure 130 and the second steering structure 140, which is conducive to the steering of the carrier device 200.

[0110] For example, see Figure 6 and Figure 7As shown, optionally, the energy storage connection device includes a fixed connection device 250, and the connecting frame 220 includes a pull rod 222 and a connecting support rod 224; the first end of the pull rod 222 is pivotally connected to the first carrier frame 211, and the corresponding second end of the pull rod 222 is pivotally connected to the connecting support rod 224; the first end of the connecting support rod 224 is fixedly connected to the second carrier frame 212, and the corresponding second end of the connecting support rod 224 is connected to the fixed connection device 250; wherein the second end of the pull rod 222 is located between the first and second ends of the connecting support rod 224. The fixed connection device 250 and / or the connecting support rod 224 support the energy storage device 300 so that the energy storage device 300 is located above the connecting support rod 224, so that the connecting support rod 224 carries the energy storage device 300. The vertical lifting gravity flow energy storage system described in this embodiment adopts a first carrier frame 211, a second carrier frame 212, a pull rod 222 and a connecting support rod 224 to form a triangular structure, which helps to improve the stability of the carrier device 200 and the energy storage device 300 during movement, and also helps to improve the carrying capacity of the carrier device 200; the first end of the pull rod 222 is pivoted to the first carrier frame 211, and the second end of the pull rod 222 is pivoted to the connecting support rod 224, so that the carrier device 200 can pass through the first steering structure 130 and the second steering structure 140, which is conducive to the steering of the carrier device 200. In some embodiments, the connecting frame 220 also includes a reinforcement rod 225; the first end of the reinforcement rod 225 is fixedly connected to the second carrier frame 212, and the corresponding second end of the reinforcement rod 225 is connected to the connecting support rod 224; the fixed connection device 250, the second end of the reinforcement rod 225, the second end of the pull rod 222 and the first end of the connecting support rod 224 are arranged in sequence along the axial direction of the connecting support rod 224; the reinforcement rod 225 is used to further improve the bearing capacity of the connecting support rod 224.

[0111] Optionally, when there are two vertical lifting units, the fixed connection devices 250 of the two vertical lifting units are respectively connected to the corresponding two ends of the energy storage device 300, so as to improve the stability of the energy storage device 300 during operation to a certain extent.

[0112] See also Figure 6 、 Figure 7 、 Figure 17 and Figure 18 As shown, in an optional solution of this embodiment, the pull rod 222 includes two pull rod parts; the two pull rod parts have the same length and are hinged to each other.

[0113] When the energy storage connection device includes a suspension device 230, the plane formed by the first carrier frame 211 and the second carrier frame 212, the support rod 221, and the pull rod 222 can form a right triangle in the first direction. Alternatively, when the energy storage connection device includes a fixed connection device 250, the plane formed by the first carrier frame 211 and the second carrier frame 212, the connecting rod 224, and the pull rod 222 can form a right triangle in the first direction. The first carrier frame 211, the second carrier frame 212, the pull rod 222, the support rod 221, or the connecting rod 224 forming a right triangle in the first direction helps improve the stability of the carrier device 200 and the energy storage device 300 during movement, and also helps improve the carrying capacity of the carrier device 200.

[0114] For example, when the energy storage connection device includes the suspension device 230, the length of the support rod 221 is a, and the angle between the pull rod 222 and the support rod 221 is α, then the length of the pull rod 222 is a / cosα, and the vertical distance between the centers of the first carrying rack 211 and the second carrying rack 212 is y: y=a·tanα.

[0115] For example, when the energy storage connection device includes a fixed connection device 250, the length between the second end of the pull rod 222 and the first end of the connecting support rod 224 is a, that is, the length between the pivot joint of the pull rod 222 and the connecting support rod 224 and the first end of the connecting support rod 224 is a; the angle between the pull rod 222 and the connecting support rod 224 is α, then the length of the pull rod 222 is a / cosα, and the vertical distance between the centers of the first carrier frame 211 and the second carrier frame 212 is y: y=a·tanα.

[0116] The radius of the first steering structure 130 and the second steering structure 140 are both r. When the carrier 200 runs to the first steering structure 130 or the second steering structure 140, the central angle corresponding to y is 2β, and the angle between the pull rod portion and the tangent line of the outer circumference of the first steering structure 130 or the second steering structure 140 is θ;

[0117] ;

[0118] If 90°<θ, then y is greater than

[0119] .

[0120] When the carrier 200 reaches the top or bottom of the carrier cable 120, that is, when the carrier 200 reaches the top of the second steering structure 140 or the bottom of the first steering structure 130, the relative relationship between the first carrier frame 211 and the second carrier frame 212 reaches its limit. At this point, the arc length of the carrier 200 on the outer circumference of the first steering structure 130 or the second steering structure 140 is a·tanα, that is, the arc length of the carrier 200 on the outer circumference of the first steering structure 130 or the second steering structure 140 is y, and the central angle corresponding to y is 2β, then 2β = a·tanα / r. Based on the geometric structure, the angle θ between the tie rod portion (i.e., the length of the tie rod portion, which is half the length of the tie rod 222) and the tangent line of the outer circumference of the first steering structure 130 or the second steering structure 140 can be deduced as:

[0121] .

[0122] Since the maximum limit of the pull rod can only be tangent to the outer circumference of the first steering structure 130 or the second steering structure 140, 90°<θ. Therefore, it can be deduced that the vertical distance y between the centers of the first carrier rack 211 and the second carrier rack 212 should satisfy: y>

[0123] .

[0124] See also Figure 6 、 Figure 7 、 Figure 17 and Figure 18 As shown, in an optional solution of this embodiment, in a single vertical lifting unit, the pull rod 222 includes at least two pull rod parts, and the multiple pull rod parts are hinged in sequence.

[0125] Optionally, in a single vertical lift unit, when the energy storage connection device includes a suspension device 230, the hinge axes of all tie rod portions, the pinned axis between the support rod 221 and the tie rod 222, the pivot axis between the tie rod 222 and the first carrier frame 211, and the pivot axis between the support rod 221 and the second carrier frame 212 are parallel. This design helps improve the flexibility of the carrier 200, facilitating steering of the carrier 200 on the first steering structure 130 and the second steering structure 140. Optionally, the connecting axis 223 is a pinned axis between the support rod 221 and the tie rod 222, further improving the flexibility of the carrier 200 and facilitating steering of the carrier 200 on the first steering structure 130 and the second steering structure 140.

[0126] Optionally, in a single vertical lifting unit, when the energy storage connection device includes a fixed connection device 250, the hinge axes of all the pull rod parts, the pivot axes of the connecting support rod 224 and the pull rod 222, and the pivot axes of the pull rod 222 and the first transport frame 211 are parallel; the above design helps to improve the flexibility of the transport device 200 and facilitates the transport device 200 to turn on the first steering structure 130 and the second steering structure 140.

[0127] Optionally, the first transport frame 211 is provided with a support pivotally connected to the pull rod 222. Optionally, the connecting rod 224 is provided with a support pivotally connected to the pull rod 222, or the second transport frame 212 is provided with a support pivotally connected to the support rod 221.

[0128] In some embodiments, the pull rod 222 includes two pull rod portions; when the energy storage connection device includes a suspension device 230, when the first carrier rack 211 is parallel to the second carrier rack 212, the plane where the first carrier rack 211 and the second carrier rack 212 are located is perpendicular to the support rod 221; or, when the energy storage connection device includes a fixed connection device 250, when the first carrier rack 211 is parallel to the second carrier rack 212, the plane where the first carrier rack 211 and the second carrier rack 212 are located is perpendicular to the connecting support rod 224.

[0129] See also Figure 8 As shown, in an optional solution of this embodiment, the rope connection structure 240 includes a rope clamping member 241, a locking member 242 and a fastener 243; the rope clamping member 241 includes a fixedly connected end portion and a screw portion.

[0130] Optionally, at least one of the end of the cable clamp 241 and the locking member 242 has a cable groove 2411 for accommodating the carrying cable 120. Optionally, both the cable clamp 241 and the locking member 242 are provided with a cable groove 2411 to reduce or avoid possible damage to the carrying cable 120 caused by the cable clamp 241 and the locking member 242 when fastened.

[0131] Optionally, a locking member 242, a fastener 243, a carrying frame and a fastener 243 are sequentially sleeved on the screw portion of the rope clamp 241; the fastener 243 between the locking member 242 and the carrying frame is used to clamp the locking member 242 and the rope clamp 241 and fix the carrying rope 120; the fastener 243 on the side of the carrying frame away from the locking member 242 is used to fasten the rope connecting structure 240 to the carrying frame.

[0132] See also Figure 8 As shown, in an optional solution of this embodiment, the end of the cable clamping member 241 includes a straight portion 2412 and a transition portion 2413 .

[0133] Along the axial direction of the cable groove 2411, both ends of the straight portion 2412 are fixedly connected with a transition portion 2413; the outer diameter of the transition portion 2413 gradually decreases, and the large diameter end of the transition portion 2413 is connected to the straight portion 2412, and the outer diameter of the straight portion 2412 is constant; through the transition portion 2413, the contact between the carrying device 200 and the first steering structure 130 and the second steering structure 140 is transitioned and buffered, which is beneficial for the carrying device 200 to turn on the first steering structure 130 and the second steering structure 140, and can effectively improve the service life of the carrying device 200 and the carrying cable 120.

[0134] Optionally, both the cable clamping member 241 and the locking member 242 are provided with a cable groove 2411 ; the cable groove 2411 passes through the straight portion 2412 and the transition portion 2413 .

[0135] In an optional solution 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.

[0136] In an optional solution of this embodiment, the first steering structure 130 and the second steering structure 140 are respectively steering wheels 150 or reels 160, that is, the first steering structure 130 is the steering wheel 150 or reel 160, and the second steering structure 140 is the steering wheel 150 or reel 160.

[0137] See also Figure 1-Figure 3 As shown, optionally, in a single vertical lifting unit, when the first steering structure 130 or the second steering structure 140 is a steering wheel 150, the number of steering wheels 150 of the first steering structure 130 or the second steering structure 140 is consistent with the number of carrying ropes 120, and the steering wheels 150 are provided with wheel grooves that cooperate with the carrying ropes 120; all the steering wheels 150 of the first steering structure 130 or the second steering structure 140 are connected by a coupling, and the driving device 400 or the power generation device 500 is respectively connected to the coupling, so that the driving device 400 or the power generation device 500 respectively drives all the steering wheels 150 of the first steering structure 130 or all the steering wheels 150 of the second steering structure 140 through the coupling, so that all the steering wheels 150 of the first steering structure 130 or all the steering wheels 150 of the second steering structure 140 rotate synchronously.

[0138] See also Figures 9-15As shown, optionally, in a single vertical lifting unit, 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 wheel grooves that matches the number of all the carrying cables 120, and the drive device 400 or the power generation device 500 is respectively connected to the drum shaft of the drum 160; that is, the first steering structure 130 is provided with a drum 160 for rotatably connecting with all the carrying cables 120; and the second steering structure 140 is also provided with a drum 160 for rotatably connecting with all the carrying cables 120. In this embodiment, the first steering structure 130 or the second steering structure 140 is provided with a wheel groove to increase the friction between the carrying cables 120 and the first steering structure 130 or the second steering structure 140, and also to prevent the carrying cables 120 from separating from the first steering structure 130 or the second steering structure 140.

[0139] In this embodiment, the drive device 400 can be installed at a low altitude to drive the first steering structure 130, or at a high altitude to drive the second steering structure 140, or the drive device 400 can be installed at both the low and high altitudes to drive the first and second steering structures 130 and 140. When the drive device 400 is located at a high altitude, the load during energy storage can be reduced; when located at a low altitude, the installation of the drive device 400 is facilitated. The specific installation location of the drive device 400 can be determined based on site conditions.

[0140] In this embodiment, the generator 500 can be installed at a low altitude to drive the connection to the first steering structure 130, or at a high altitude to drive the connection to the second steering structure 140, or the generator 500 can be installed at both low and high altitudes to connect to the first and second steering structures 130 and 140. When the generator 500 is located at a high altitude, the load during energy storage can be reduced; when located at a low altitude, the installation of the generator 500 is facilitated. The specific installation location of the generator 500 can be determined based on site conditions.

[0141] 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 are motor-generators, or the drive device 400 and the generator 500 are independent of each other. In this embodiment, a motor-generator (also known as a motor-generator) refers to a device that can function both as a motor, converting electrical energy into gravitational potential energy, and as a generator, converting gravitational potential energy into electrical energy, thus providing bidirectional energy conversion capabilities.

[0142] See also Figure 13-16 As shown, the vertical lifting gravity flow energy storage system further includes a guide device 110; the guide device 110 is used to guide the carrying device 200 to move.

[0143] Optionally, the guide device 110 is annular and slidably connected to the carrier 200. Optionally, a rolling element is disposed between the guide device 110 and the carrier 200; the rolling element is located within the carrier 200 and on at least one corresponding mating surface between the carrier 200 and the guide device 110. The rolling element effectively reduces frictional resistance when the carrier 200 moves along the guide device 110. In this embodiment, the rolling element is, for example, a ball bearing or a rolling bearing.

[0144] Optionally, the shape of the guide device 110 is adapted to the shape of the carrying rope 120, and both the guide device 110 and the carrying rope 120 are annular. In this embodiment, the guide device 110 bears essentially no load and only provides guidance. The vertical lift gravity flow energy storage system described in this embodiment uses the carrying rope 120 to pull and carry the carrying device 200, which in turn can pull and carry the energy storage device 300. When the carrying device 200 moves, the guide device 110 provides guidance and bears horizontal shock forces, effectively improving the stability and safety of the energy storage device 300 during movement.

[0145] Optionally, there are two guide devices 110 and multiple carrying ropes 120 ; all carrying ropes 120 are located between the two guide devices 110 .

[0146] Optionally, the guide 110 is not coplanar with the carrier cable 120 .

[0147] See also Figure 17 As shown, in an optional solution of this embodiment, along the second direction, guide rail grooves 213 cooperating with the guide device 110 are provided at both ends of the carrier frame, and the guide rail grooves 213 are open at both ends along the first direction; in the second direction, the cross-section of the guide rail groove 213 is T-shaped, and the third opening of the guide rail groove 213 is located on the side away from the center of the carrier frame; a portion of the guide device 110 extends out of the third opening of the guide rail groove 213 and is used to be fixed to a building. The building can be a high-rise building or the wall of a well. By adopting the T-shaped guide rail groove 213, the movement of the carrier 200 along the guide device 110 is not affected, and the guide device 110 can be fixed, so that the guide device 110 can well withstand shock forces such as horizontal forces.

[0148] In an optional solution of this embodiment, the guide device 110 adopts a T-shaped profile.

[0149] In an optional solution of this embodiment, guide sleeves 214 are fixedly connected to both ends of the carrier frame, and guide rail grooves 213 are disposed within the guide sleeves 214; the third opening of the guide rail grooves 213 is located at the end of the guide sleeve 214 facing away from the carrier frame. The guide sleeves 214 simplify the manufacturing process of the carrier frame, helping to reduce the production cost of the carrier device 200. By using a guide device 110 with a T-shaped structural profile and cooperating with the guide sleeves 214, the guide device 110 can contact multiple rail surfaces of the guide sleeves 214, facilitating the sliding of the guide sleeves 214 on the guide device 110 and guiding and securing the guide sleeves 214 in the second and third directions.

[0150] Optionally, a rolling body is arranged between the guide device 110 and the carrier device 200; the rolling body is located inside the guide sleeve 214, and the rolling body is located on at least one corresponding mating surface of the guide sleeve 214 and the guide device 110; for example, all inner walls of the guide sleeve 214 that cooperates with the guide device 110 are provided with rolling bodies.

[0151] Compared with the prior art, the vertical lifting gravity flow energy storage system provided in this embodiment has the following beneficial effects:

[0152] 1. Using a carrying rope 120 instead of a chain to transport the energy storage device 300: A carrying rope (such as a steel wire rope or a high-strength composite rope) is much stronger than a traditional chain and can carry a larger energy storage device 300, thereby increasing power generation per unit time. Furthermore, the carrying rope has a lower material density and is lighter, resulting in less energy loss during lifting.

[0153] 2. Multiple carrying devices 200 are fixed at equal intervals on the carrying rope 120 of a single vertical lifting unit: Compared with the intermittent lifting of a single energy storage device using a wire rope winding / friction structure, the vertical lifting gravity flow energy storage system described in this embodiment enables the carrying rope 120 to continuously transport multiple energy storage devices 300 through multiple carrying devices 200, which not only improves the system's carrying capacity but also provides a continuous gravity flow, which can be converted into a continuous energy flow through the power generation device 500, thereby achieving continuous discharge. When there are two vertical lifting units, the two vertical lifting units synchronously lift multiple energy storage devices 300: Compared with the intermittent lifting of a single energy storage device using a wire rope winding / friction structure, the vertical lifting gravity flow energy storage system described in this embodiment uses two vertical lifting units to lift (for example, a four-corner lifting method) to enable the carrying rope 120 to continuously transport multiple energy storage devices 300, which not only improves the system's carrying capacity but also provides a continuous gravity flow. The continuous gravity flow can be converted into a continuous energy flow through the power generation device 500, thereby achieving continuous discharge. In addition, the two vertical lifting units drive the operation of multiple carriers 200, which is conducive to the fine motion control of energy storage devices 300 with larger loads, and is particularly suitable for scenarios that require frequent lifting or high docking accuracy. The two vertical lifting units can be controlled separately by multiple drive devices 400, and synchronized and adjusted through a PLC or servo system to achieve higher-precision positioning.

[0154] 3. Use multiple transport cables 120 to transport the energy storage device 300: Multiple transport cables simultaneously pull and propel the energy storage device 300 and bear its load. This multi-cable system reduces the load borne by a single cable, ensuring system safety and reliability. This reduced cable load allows for simultaneous transport of more energy storage devices 300, increasing system capacity and ensuring efficient operation in both energy storage and power generation modes, enabling high-power storage and discharge of electrical energy.

[0155] 4. The unique structure of the carrier 200 innovates the way the carrier 200 passes through the reel: the carrier 200 adopts a method of arranging two upper and lower carrier frames in parallel, that is, the first carrier frame 211 and the second carrier frame 212 are arranged in parallel up and down, and the two carrier frames are connected by two sets of pull rods 222 and support rods 221 or connecting struts 224 to form a triangular structure. Each carrier frame is provided with a rope connection structure 240 for fixed connection with the carrier rope 120. For example, each connecting strut 224 is connected to a fixed connection device 250 for fixing the energy storage device 300 during transportation. When carrying the energy storage device 300, the carrier devices 200 of the two vertical lifting units jointly lift one energy storage device 300. At this time, under the action of external force, the two pull rod parts are pulled into a straight line. After releasing the energy storage device 300, the carrier 200 needs to pass through the reel and then turn. When the carrier 200 passes the reel, the two carrier frames are not completely in the same plane. At the same time, due to the disappearance of external force, an angle exists between the two pull rods, thereby ensuring that the carrier 200 can pass the reel "flexibly".

[0156] 5. 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 also increases the contact area with the carrying rope 120, thereby increasing the friction between the drum 160 and the carrying rope 120, thereby improving the charging / discharging efficiency to a certain extent, and achieving high-power storage and discharge of electrical energy. Furthermore, the drum 160 can also provide more uniform contact force with the carrying rope 120, effectively reducing wear on the carrying rope 120 and extending the service life of the carrying rope 120. Furthermore, the drum 160 is less likely to slip, which is more beneficial to the stability of the vertical lift gravity flow energy storage system.

[0157] 6. By changing the lifting speed of the gravity flow or the size of the gravity flow, the real-time power consumption or power generation can be arbitrarily adjusted; the energy storage device 300 stores energy safely and economically and provides efficient and fast access.

[0158] This embodiment further provides an energy storage method applicable to the vertical lift gravity flow energy storage system described in any of the above embodiments; the method comprises:

[0159] During energy storage charging, the energy storage device 300 is located at a low-altitude storage yard. The drive device 400 is driven by electrical energy, driving the first steering structure 130 and the second steering structure 140 of all vertical lifting units to rotate, thereby driving the carrying rope 120 to operate, and then driving all the carriers 200 to move under the traction of the carrying rope 120. Multiple energy storage devices 300 are continuously assembled on the carrier 200, continuously transported to a high altitude and unloaded, thereby converting electrical energy into gravitational potential energy for storage. When approaching a high altitude, the energy storage device 300 is separated from the carrier 200, and the energy storage device 300 is transported to a high-altitude storage yard and quickly transported away by a transfer vehicle for storage. The carrier 200 continues to travel along the carrying rope 120, eventually returning to a low altitude again, ready to begin a new round of energy storage device 300 transportation tasks.

[0160] During discharge, the energy storage device 300 is located at a high-altitude storage yard. Multiple energy storage devices 300 are continuously assembled on the carrier 200 and, under the action of gravity, travel to a lower altitude and are unloaded, simultaneously driving the carrying rope 120. The carrying rope 120 drives the first steering structure 130 and the second steering structure 140 of all vertical lifting units to operate, driving the corresponding power generation device 500 to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy. This converts the gravity flow formed by the continuous online movement of multiple energy storage devices 300 into a continuous energy flow, thereby achieving continuous discharge. When approaching a low altitude, the energy storage device 300 separates from the carrier 200 and is transported to a low-altitude storage yard, where it is transported by a transfer vehicle for storage. The carrier 200 continues to travel along the carrying rope 120. Finally, the carrier 200 returns to a high altitude, ready to begin a new round of energy storage device 300 transportation.

[0161] The energy storage method described in this embodiment uses the carrying ropes 120 of all vertical lifting units of the vertical lifting gravity flow energy storage system to pull and carry the carrying device 200 for movement, and can further pull and carry the energy storage device 300 for movement, effectively improving the stability and safety of the energy storage device 300 during movement; compared with the chain structure, the carrying ropes 120 have a stronger carrying capacity and relatively smaller deadweight, effectively improving the carrying capacity and load utilization rate of the vertical lifting gravity flow energy storage system; compared with the intermittent lifting of a single energy storage device by a wire rope winding / friction lifting structure, this vertical lifting gravity flow energy storage system circulates the carrying ropes 120 between the first steering structure 130 and the second steering structure 140, and can drive the carrying device 200 through the driving device 400 to continuously transport multiple energy storage devices 300, which not only improves the system's carrying capacity but also provides a continuous gravity flow. The continuous gravity flow can be converted into a continuous energy flow through the power generation device 500, thereby achieving continuous discharge.

[0162] The energy storage method provided in this embodiment is applicable to the vertical lift gravity flow energy storage system described above. The technical features of the vertical lift gravity flow energy storage system disclosed above are also applicable to this energy storage method. The technical features of the vertical lift gravity flow energy storage system disclosed above are not repeated here. The vertical lift gravity flow energy storage system described in this embodiment adopts the above energy storage method. The above disclosed energy storage method is also applicable to this vertical lift gravity flow energy storage system.

[0163] In one embodiment, multiple energy storage devices 300 are mounted one after another on the carrier 200 at a predetermined interval, so that the energy storage devices 300 are transported continuously. The predetermined interval may be, for example, one energy storage device 300 for each carrier 200, one energy storage device 300 for every other carrier 200, or one energy storage device 300 for every other two carriers 200.

[0164] The speed and spacing of the energy storage devices 300 are adjusted in real time based on demand to alter the magnitude of the gravity flow, thereby achieving on-demand energy flow regulation and, in turn, realizing "slow charge, fast discharge" or "charge and discharge on demand" functionality. The speed of the energy storage devices 300 can be adjusted, for example, by adjusting the speed of the drive device 400 and the power generation device 500. By adjusting the speed and spacing of the energy storage devices 300 in real time based on demand to alter the magnitude of the gravity flow, the vertical lift gravity flow energy storage system has a wider adaptability.

[0165] In one embodiment, multiple vertical lift gravity flow energy storage systems are installed horizontally in parallel based on the topography of a vertical structure, enabling larger-scale energy storage. Examples of vertical structures include abandoned mines and specific buildings.

[0166] Example of power generation using the vertical lift gravity flow energy storage system and energy storage method described in this embodiment:

[0167] When the energy storage connection device includes the suspension device 230, the energy storage device 300 is suspended on the carrier 200. The energy storage device 300 is mainly made of reinforced concrete with a density of 2500 kg / m 3 The shape is a cuboid with the dimensions of 2.0m long, 0.60m wide and 2.0m high, and weighs 6.0 tons. Assuming a vertical lift of 148m, a single energy storage device 300 is lifted from the lower storage yard (i.e., the lower elevation) to the upper storage yard (i.e., the higher elevation), the energy that can be stored is E=mgh=6.0×10 3 kg×9.8m / s 2× 148m = 9,702,400J ≈ 2.4kWh. Considering the operating speed of equipment such as mine hoists, cranes, and elevators, at a speed of 8 meters per second, the system can travel 28.8 kilometers per hour. Assuming the energy storage devices 300 are arranged at 15-meter intervals, 1920 energy storage devices 300 can be transported to the upper storage yard per hour, storing 1920 × 2.4 kWh per device = 4608 kW·h ≈ 4.6 MWh of energy per hour. To increase power generation capacity, multiple systems can be arranged in parallel in multiple rows on the terrain. Alternatively, the storage capacity can be expanded by increasing the speed of the transport cables 120 or reducing the spacing between the energy storage devices 300.

[0168] When the energy storage connection device includes a fixed connection device 250, the energy storage device 300 is supported by the carrier 200. The energy storage device 300 is mainly made of reinforced concrete with a density of 2500kg / m 3 The shape is a cuboid with the dimensions of 1.2m long, 1.2m wide, and 1.0m high, and weighs 3.6 tons. Assuming a vertical lift of 200m, a single energy storage device 300 is lifted from the lower storage yard (i.e., the lower elevation) to the upper storage yard (i.e., the higher elevation), and the energy that can be stored is E=mgh=3.6×10 3 kg×9.8m / s 2 × 200m = 7,056,000J ≈ 1.96kWh. Considering the operating speed of equipment such as mine hoists, cranes, and elevators, at a speed of 8 meters per second, the system can travel 28.8 kilometers per hour. Assuming the energy storage devices 300 are arranged at 15-meter intervals, 1,920 energy storage devices 300 can be transported to the upper storage yard per hour, storing 1,920 × 1.96kWh / device = 3,763.2kWh ≈ 3.8MWh of energy per hour. To increase power generation capacity, multiple systems can be arranged in parallel in multiple rows on the terrain. Alternatively, the storage capacity can be expanded by increasing the speed of the transport cables 120 or reducing the spacing between the energy storage devices 300.

[0169] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A vertical lifting gravity flow energy storage system, characterized in that: It comprises at least one vertical lifting unit, an energy storage device (300), a driving device (400), a power generation device (500), and a storage yard for storing the energy storage device (300); Each of the vertical lifting units comprises a carrying rope (120), a first steering structure (130), a second steering structure (140) and a carrying device (200); in a single vertical lifting unit, the second steering structure (140) is located above the first steering structure (130), the carrying rope (120) circulates between the first steering structure (130) and the second steering structure (140), and a plurality of the carrying devices (200) are fixedly connected to the carrying rope (120); the first steering structure (130) is located at a low altitude position, and the second steering structure (140) is located at a high altitude position; the stacking yard is provided at both the low altitude position and the high altitude position; The same energy storage device (300) is detachably connected to the corresponding carrying devices (200) of all the vertical lifting units; The driving device (400) is connected to the vertical lifting unit to drive the carrying ropes (120) of all the vertical lifting units to operate synchronously, thereby driving all the carrying devices (200) to operate, thereby continuously vertically lifting the plurality of energy storage devices (300) stored in the storage yard at a low altitude to convert electrical energy into gravitational potential energy for storage; The power generation device (500) is connected to the vertical lifting unit; the plurality of energy storage devices (300) stored in the stacking yard at a high altitude continuously move downward under the action of gravity to form a continuous gravity flow, and at the same time drive the corresponding carrier devices (200) to move downward, thereby driving the carrier ropes (120) of all the vertical lifting units to operate synchronously, and further driving 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; In a single vertical lifting unit, the carrier (200) comprises a carrier frame (210), a connecting frame (220), an energy storage connecting device, and a rope connecting structure (240); the carrier (200) has a first direction, a second direction, and a third direction that intersect with each other; The carrier frame (210) includes at least two carrier frames, all of which are sequentially spaced apart along the first direction, and each of the carrier frames is connected to at least two rope connection structures (240) arranged along the second direction, and the rope connection structures (240) are fixedly connected to the carrier rope (120); Along the third direction, the connecting frame (220) and the carrying rope (120) are respectively located on both sides of the carrying frame (210); each of the carrying small frames is respectively connected to the connecting frame (220), and the energy storage connection device is connected to the connecting frame (220); The energy storage device (300) is detachably connected to the energy storage connection device.

2. The vertical lifting gravity flow energy storage system according to claim 1 is characterized in that: The number of the vertical lifting unit is one, and the vertical lifting unit includes at least two carrying ropes (120); Alternatively, the number of the vertical lifting units is two, and the two vertical lifting units are located on both sides of the same energy storage device (300); the running directions of the carrying ropes (120) of the two vertical lifting units are opposite; a single vertical lifting unit includes at least two carrying ropes (120); and the carrying devices (200) of the two vertical lifting units are arranged at intervals; All the carrying ropes (120) are arranged in parallel.

3. The vertical lifting gravity flow energy storage system according to claim 2, characterized in that: There are two transport racks, namely a first transport rack (211) and a second transport rack (212); the rope connection structures (240) on the first transport rack (211), the rope connection structures (240) on the second transport rack (212), and the transport ropes (120) are the same in number; along the first direction, the rope connection structures (240) on the first transport rack (211) and the rope connection structures (240) on the second transport rack (212) are respectively fixedly connected to the corresponding transport ropes (120); The energy storage connection device includes a suspension device (230) for suspending and connecting the energy storage device (300); the connection frame (220) includes a support rod (221), a pull rod (222) and a connecting shaft (223); the first end of the pull rod (222) is pivotally connected to the first transport frame (211), the first end of the support rod (221) is pivotally connected to the second transport frame (212), the second end of the support rod (221) is pin-connected to the second end of the pull rod (222), so that the support rod (221) and the pull rod (222) form an angle rod structure; the number of the angle rod structures is multiple, and the multiple angle rod structures are sequentially spaced along the second direction; the connecting shaft (223) is connected to all the angle rod structures; the suspension device (230) is rotatably connected to the connecting shaft (223); Alternatively, the energy storage connection device includes a fixed connection device (250); the connecting frame (220) includes a pull rod (222) and a connecting support rod (224); the first end of the pull rod (222) is pivotally connected to the first transport frame (211), and the corresponding second end is pivotally connected to the connecting support rod (224); the first end of the connecting support rod (224) is fixedly connected to the second transport frame (212), and the corresponding second end is connected to the fixed connection device (250); the second end of the pull rod (222) is located between the first end and the second end of the connecting support rod (224); the fixed connection device (250) and / or the connecting support rod (224) support and connect the energy storage device (300) so that the energy storage device (300) is located above the connecting support rod (224).

4. The vertical lifting gravity flow energy storage system according to claim 3, characterized in that: When the energy storage connection device includes a fixed connection device (250), the connection frame (220) further includes a reinforcement rod (225); a first end of the reinforcement rod (225) is fixedly connected to the second carrier frame (212), and a corresponding second end is connected to the connection support rod (224); the fixed connection device (250), the second end of the reinforcement rod (225), the second end of the pull rod (222), and the first end of the connection support rod (224) are arranged in sequence along the axial direction of the connection support rod (224); When the number of the vertical lifting units is two, the fixed connection devices (250) of the two vertical lifting units are respectively connected to corresponding two ends of the energy storage device (300).

5. The vertical lifting gravity flow energy storage system according to claim 3, characterized in that: The pull rod (222) includes two pull rod parts; the two pull rod parts have the same length and are hinged to each other; the plane formed by the first transport frame (211) and the second transport frame (212) can form a right triangle with the pull rod (222), the support rod (221) or the connecting rod (224) in the first direction; When the energy storage connection device includes a suspension device (230), the length of the support rod (221) is a, and the angle between the pull rod (222) and the support rod (221) is α; or when the energy storage connection device includes a fixed connection device (250), the length between the second end of the pull rod (222) and the first end of the connecting support rod (224) is a, and the angle between the pull rod (222) and the connecting support rod (224) is α; then the length of the pull rod (222) is a / cosα, and the vertical distance between the centers of the first transport rack (211) and the second transport rack (212) is y: y=a·tanα; The radius of the first steering structure (130) and the radius of the second steering structure (140) are both r. When the carrier (200) runs to the first steering structure (130) or the second steering structure (140), the central angle corresponding to y is 2β, and the angle between the pull rod portion and the tangent line of the outer circumferential surface of the first steering structure (130) or the second steering structure (140) is θ; then ； If 90°<θ, then y is greater than 。 6. The vertical lifting gravity flow energy storage system according to claim 3, characterized in that: The pull rod (222) comprises at least two pull rod parts, and the plurality of pull rod parts are hinged in sequence; When the energy storage connection device includes a suspension device (230), the hinge axes of all the pull rod parts, the pin connection axis between the support rod (221) and the pull rod (222), the pivot axis between the pull rod (222) and the first transport frame (211), and the pivot axis between the support rod (221) and the second transport frame (212) are parallel; the connection axis (223) is the pin connection axis between the support rod (221) and the pull rod (222); Alternatively, when the energy storage connection device includes a fixed connection device (250), the hinge axes of all the pull rod parts, the pivot axes between the connecting support rod (224) and the pull rod (222), and the pivot axes between the pull rod (222) and the first transport frame (211) are parallel.

7. The vertical lifting gravity flow energy storage system according to claim 6, characterized in that: The pull rod (222) includes two pull rod parts; When the first transport rack (211) is parallel to the second transport rack (212), the plane on which the first transport rack (211) and the second transport rack (212) are located is perpendicular to the support rod (221) or the connecting rod (224).

8. The vertical lifting gravity flow energy storage system according to claim 1, characterized in that: The rope connection structure (240) comprises a rope clamping member (241), a locking member (242), and a fastener (243); the rope clamping member (241) comprises a fixedly connected end portion and a screw portion; At least one of the end of the cable clamping member (241) and the locking member (242) has a cable groove (2411) for accommodating the carrying cable (120); The screw portion of the rope clamping member (241) is sleeved with the locking member (242), the fastener (243), the carrying frame and the fastener (243) in sequence; the fastener (243) between the locking member (242) and the carrying frame is used to clamp the locking member (242) and the rope clamping member (241) and fix the carrying rope (120); the fastener (243) on the side of the carrying frame away from the locking member (242) is used to fasten the rope connection structure (240) to the carrying frame.

9. The vertical lifting gravity flow energy storage system according to claim 8, characterized in that: The end of the cable clamp (241) includes a straight portion (2412) and a transition portion (2413); Along the axial direction of the cable groove (2411), both ends of the straight portion (2412) are fixedly connected to the transition portion (2413); the outer diameter of the transition portion (2413) gradually decreases, and the large diameter end of the transition portion (2413) is connected to the straight portion (2412); the outer diameter of the straight portion (2412) is a constant value; The cable clamping member (241) and the locking member (242) are both provided with a cable groove (2411); The cable groove (2411) passes through the straight portion (2412) and the transition portion (2413).

10. The vertical lifting gravity flow energy storage system according to claim 1, characterized in that: The driving device (400) is connected to the first steering structure (130) and / or the second steering structure (140) so as to be able to drive the carrying rope (120) to operate; The power generation device (500) is connected to the first steering structure (130) and / or the second steering structure (140); 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; The first steering structure (130) and the second steering structure (140) are respectively steering wheels (150) or reels (160); When the first steering structure (130) or the second steering structure (140) is a steering wheel (150), the number of the steering wheels (150) of the first steering structure (130) or the second steering structure (140) is consistent with the number of the carrying ropes (120), and the steering wheels (150) are provided with wheel grooves that cooperate with the carrying ropes (120); all the steering wheels (150) of the first steering structure (130) or the second steering structure (140) are connected by a coupling, and the driving 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 wheel grooves having the same number as all the carrying ropes (120), and the driving device (400) or the power generation device (500) is respectively connected to the drum shaft of the drum (160); The first steering structure (130) and the second steering structure (140) are both connected to a support; 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.

11. The vertical lifting gravity flow energy storage system according to claim 1, characterized in that: The number of the vertical lifting units is two, and the two vertical lifting units are connected to the corresponding driving device (400) in common, or the two vertical lifting units are each connected to a different driving device (400); the two vertical lifting units are connected to the corresponding power generation device (500) in common, or the two vertical lifting units are each connected to a different power generation device (500); In a single vertical lifting unit, the number of the carrying ropes (120) is two, and the carrying ropes (120) and the energy storage device (300) are located on both sides of the carrying device (200); The vertical lifting gravity flow energy storage system further comprises a transfer device (600); the transfer device (600) is provided at both the low altitude position and the high altitude position; the energy storage device (300) is transported back and forth between the storage yard and the transport device (200) via the transfer device (600).

12. The vertical lifting gravity flow energy storage system according to claim 1, characterized in that: The vertical lifting gravity flow energy storage system further comprises a guide device (110) for guiding the carrier (200) to move; the guide device (110) is annular; Along the second direction, two ends of the transport frame are provided with guide rail grooves (213) that cooperate with the guide device (110), and the guide rail groove (213) is open at both ends along the first direction; in the second direction, the cross-section of the guide rail groove (213) is T-shaped, and the third opening of the guide rail groove (213) is located on a side away from the center of the transport frame; a portion of the guide device (110) extends out of the third opening of the guide rail groove (213) and is used to be fixed to the building; The guide device (110) adopts a T-shaped profile; The two ends of the transport frame are fixedly connected to a guide sleeve (214), and the guide rail groove (213) is arranged in the guide sleeve (214); the third opening of the guide rail groove (213) is arranged at the end of the guide sleeve (214) away from the transport frame; The number of the guide devices (110) is two, and all the carrying ropes (120) are located between the two guide devices (110); A rolling body is provided between the guide device (110) and the carrier device (200); the rolling body is located inside the carrier device (200), and the rolling body is located on at least one corresponding mating surface of the carrier device (200) and the guide device (110).

13. An energy storage method, characterized in that: Applicable to the vertical lifting gravity flow energy storage system according to any one of claims 1 to 12; the method comprises: During energy storage charging, the energy storage device (300) is located at a storage yard at a low altitude, and the driving device (400) is driven by electric energy to drive the first steering structure (130) and the second steering structure (140) of all the vertical lifting units to rotate, thereby driving the carrying rope (120) to operate, and further driving all the carrying devices (200) to move under the traction of the carrying rope (120); multiple energy storage devices (300) are continuously assembled on the carrying device (200), continuously transported to a high altitude and unloaded, thereby converting electric energy into gravitational potential energy for storage; During discharge, the energy storage device (300) is located at a high-altitude storage yard, and a plurality of the energy storage devices (300) are continuously assembled on the transport device (200), and are moved to a low-altitude position and unloaded under the action of gravity, while driving the transport rope (120) to operate; the transport rope (120) drives the first steering structure (130) and the second steering structure (140) of all the vertical lifting units to operate, so as to drive the power generation device (500) to continuously generate electricity, thereby converting gravitational potential energy into continuous electrical energy.

14. The energy storage method according to claim 13, characterized in that: A plurality of the energy storage devices (300) are assembled one by one on the transport device (200) at preset intervals, so that the energy storage devices (300) are transported continuously; 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 on-demand adjustment of the energy flow, thereby realizing the "slow charging and fast discharging" or "on-demand charging and discharging" functions.

15. The energy storage method according to claim 13, characterized in that: There are multiple vertical lifting gravity flow energy storage systems; A plurality of the vertical lifting gravity flow energy storage systems are installed in parallel in the horizontal direction according to the vertical structure terrain.

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