Solid gravity flow transport equipment, gravity energy storage element and energy storage system

Abstract

The present invention discloses a solid gravity flow carrier, a gravity energy storage element and an energy storage system, comprising a transfer track, the transfer track having a low altitude section and a high altitude section opposite to the low altitude section, and an inclined section, and used for directional movement of the gravity energy storage element; a plurality of push mechanisms are provided and arranged side by side along the inclined section of the transfer track; an electric energy kinetic energy conversion mechanism is connected to the push mechanism; a plurality of push mechanisms are driven by the corresponding electric energy kinetic energy conversion mechanism to move, and drive a plurality of gravity energy storage elements to continuously push from the low altitude section to the high altitude section along the inclined section; or a plurality of push mechanisms are moved by the gravity of a plurality of gravity energy storage elements, and drive the corresponding electric energy kinetic energy conversion mechanism to convert mechanical kinetic energy into electrical energy, wherein the gravity is formed by the gravity energy storage element continuously pushing from the high altitude section to the low altitude section along the inclined section. The problem of high terrain requirements and poor applicability in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of gravity energy storage, and in particular to a solid gravity flow transport device, a gravity energy storage element and an energy storage system. Background Art

[0002] Human society's use of energy is limited by reserves, and the use of fossil energy such as coal, oil, and natural gas that pollute the environment in production and life has changed. It is inevitable that the dependence on traditional polluting energy will be transformed into renewable energy such as solar energy and wind energy that are inexhaustible, clean, environmentally friendly, and renewable.

[0003] However, renewable energy is naturally generated, intermittent and randomly fluctuating, and is an unstable energy source. To transform intermittent and randomly fluctuating unstable energy into smart energy that is supplied on demand, energy storage is the key to energy transformation. Energy is the basic material for the operation of human society, and its daily consumption is huge. Based on the characteristics of the sun's sunshine, the amount of electricity that can be directly used during sunshine is only close to 25% of the annual electricity consumption; given the characteristics of wind formation, the main output of wind power generation is at night, and the amount of electricity that is directly consumed is only about 25%; about 75% of the electricity needs to be stored. The energy storage system provides electricity to social loads during the period when wind and solar power generation cannot be output. Therefore, what is needed for energy transformation is a super-large-scale energy storage system.

[0004] Existing energy storage technologies include pumped storage, which is suitable for large-capacity energy storage. However, the construction of pumped storage power stations requires the construction of reservoirs at both high and low altitudes. The geographical resources that can meet these terrain conditions are extremely limited, and cannot meet the geographical resource requirements for station sites required for ultra-large-scale energy storage required for energy transformation.

[0005] In summary, the pumped storage in the prior art has the disadvantages of high terrain requirements and low applicability. Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a solid gravity flow transport device, a gravity energy storage element and an energy storage system to solve the problems in the prior art of high requirements on terrain and poor applicability.

[0007] The technical solution of the present invention is as follows:

[0008] A solid gravity flow carrying device, used for moving gravity energy storage elements, comprising:

[0009] a transfer track having a low altitude section and a high altitude section opposite to the low altitude section, and an inclined section between the low altitude section and the high altitude section, and used for directional movement of the gravity energy storage element;

[0010] A pushing mechanism, wherein a plurality of the pushing mechanisms are provided, and the plurality of the pushing mechanisms are provided along the inclined section of the transfer track;

[0011] An electric energy-kinetic energy conversion mechanism, the electric energy-kinetic energy conversion mechanism is connected to the pushing mechanism;

[0012] The plurality of pushing mechanisms are driven by the corresponding electric energy-kinetic energy conversion mechanisms to move, and drive the plurality of gravity energy storage elements that are abutted in sequence to be continuously pushed along the inclined section from the low altitude section to the high altitude section; or

[0013] The multiple pushing mechanisms move through the gravity action of the multiple gravity energy storage elements abutting against each other in sequence, and drive the corresponding electric energy-kinetic energy conversion mechanisms to convert mechanical kinetic energy into electrical energy, wherein the gravity action is formed by the gravity energy storage elements continuously pushing down from the high altitude section to the low altitude section along the inclined section.

[0014] Further, the pushing mechanism includes two chain transmission assemblies located on both sides, and a force transmission member arranged between the two chain transmission assemblies;

[0015] The chain transmission assembly comprises: a driving sprocket, a driven sprocket, and a chain sleeved on the driving sprocket and the driven sprocket, wherein the chain is arranged along the extending direction of the inclined section;

[0016] The force transmission member is connected to the chains on both sides and is used to connect the gravity energy storage element.

[0017] Furthermore, the pushing mechanism further comprises a driving shaft, and the driving sprockets of the two chain transmission assemblies are both connected to the driving shaft;

[0018] The electric energy to kinetic energy conversion mechanism is connected to the driving shaft;

[0019] The pushing mechanism is provided with a braking mechanism, and the braking mechanism comprises:

[0020] a brake drum connected to an end of the driving shaft away from the electric energy to kinetic energy conversion mechanism;

[0021] A brake pad is used to abut against the brake drum.

[0022] Furthermore, the solid gravity flow carrier device further comprises a horizontal push mechanism, and the horizontal push mechanism is arranged at the low altitude section and the high altitude section of the transfer track;

[0023] The horizontal push mechanism comprises: a slideway, the slideway and the transfer track are arranged in the same direction;

[0024] A ram, wherein the ram is slidably disposed on the slideway;

[0025] a telescopic assembly, the telescopic assembly being disposed on the ram and being connected to or disconnected from the gravity energy storage element by telescoping; and

[0026] A linear motor is disposed below the ram and connected to the ram.

[0027] Based on the same concept, the present invention also proposes a gravity energy storage element, which is used for the solid gravity flow carrying equipment as described above; wherein the force transmission member includes a force transmission rod;

[0028] The gravity energy storage element comprises: an energy storage element body, and hook teeth arranged on the energy storage element body;

[0029] The hook teeth hook the force transmission rod and transmit the torque.

[0030] Furthermore, one end of the energy storage element body is provided with a push concave platform, and the other end is provided with a push convex platform;

[0031] The pushing concave platform of one of the gravity energy storage elements is used to abut against the pushing convex platform of another adjacent gravity energy storage element.

[0032] Further, the gravity energy storage element further comprises: a track wheel, the track wheel being rotatably arranged on the energy storage element body and moving against the transfer track;

[0033] The transfer tracks are provided with two groups, and the two groups of transfer tracks are located at the left and right sides. The track wheels are provided with a plurality of tracks, and the plurality of track wheels respectively abut against the transfer tracks at the two sides.

[0034] Furthermore, the upper surface of the gravity energy storage element is provided with a hook tooth groove and a roller groove;

[0035] When the gravity energy storage elements are stacked, the hook tooth recess is used to accommodate the hook tooth of another adjacent gravity energy storage element, and the roller recess is used to accommodate the track wheel of another adjacent gravity energy storage element;

[0036] The left and right sides of the gravity energy storage element are respectively provided with hanging parts.

[0037] Based on the same concept, the present invention also proposes a gravity energy storage element, comprising the solid gravity flow carrying device as described above, and a plurality of gravity energy storage elements, a low altitude yard and a high altitude yard; the gravity energy storage element is separated from or connected to the pushing mechanism, the low altitude section runs through the low altitude yard, and the high altitude section runs through the high altitude yard;

[0038] When the energy storage system is storing energy, the low altitude yard is used to transport the gravity energy storage elements to the low altitude section, and the high altitude yard is used to receive and store the gravity energy storage elements from the high altitude section;

[0039] When the energy storage system releases energy, the high-altitude yard is used to transport the gravity energy storage elements to the high-altitude section, and the low-altitude yard is used to receive and store the gravity energy storage elements from the low-altitude section.

[0040] Furthermore, the low-altitude stack and the high-altitude stack are both equipped with cranes for loading, unloading and stacking gravity energy storage elements, and the cranes are arranged vertically along the extension direction of the transfer track;

[0041] There are multiple traveling cranes, which alternately load or unload the gravity energy storage elements on the transfer track, ensuring that the collection and distribution speeds of the low-altitude pile and the high-altitude yard are coordinated with the flow rate of the solid gravity flow, so as to ensure the formation of the solid gravity flow of the lifting channel.

[0042] Beneficial effects: Compared with the linear motor propulsion technology, the energy conversion element of the electric energy kinetic energy conversion mechanism of the present invention adopts a rotating motor, and the energy conversion efficiency is higher. The present invention proposes a solid gravity flow carrier, a gravity energy storage element and an energy storage system, wherein the gravity energy storage element is pushed up by mechanical power, and the gravity energy storage element can be directed up or down along the transfer track by laying a transfer track. When storing energy, the multiple electric energy kinetic energy conversion mechanisms on the inclined section convert the electric energy of the power grid into mechanical kinetic energy, drive the movement of the multiple pushing mechanisms, and the movement of the multiple pushing mechanisms drives the gravity energy storage elements of the entire process to be continuously pushed from the low altitude section to the high altitude section along the inclined section. When releasing energy, the gravity energy storage element is continuously pushed from the high altitude section to the low altitude section along the inclined section under the action of gravity, and the multiple pushing mechanisms move through the gravity of the multiple gravity energy storage elements, and drive the corresponding electric energy kinetic energy conversion mechanism to convert mechanical kinetic energy into electric energy. Thus, the storage and release of electric energy are realized. When there is sufficient electric energy, the electric energy is converted into mechanical energy to transport the gravity energy storage elements to a high place, forming gravitational potential energy for storage; when there is a shortage of electric energy, the gravitational potential energy of the gravity energy storage elements stored at a high place is converted into electric energy and fed into the power grid. Moreover, the solid gravity energy storage elements of the entire inclined section abut against each other during pushing to form a solid gravity flow. The solid gravity energy storage elements are densely distributed in the inclined section, forming a large downward thrust throughout the inclined section, which places very high requirements on the structural strength of the entire pushing mechanism. The components of the single-stage pushing mechanism cannot withstand such concentrated thrust. Therefore, the pushing mechanism of the present invention adopts a segmented setting to push the gravity energy storage elements of the entire section in a segmented relay manner. Each of the pushing mechanisms is only responsible for pushing part of the gravity energy storage elements for a certain distance, thereby avoiding excessive concentration of thrust of the solid gravity flow of the entire inclined section. The segmented pushing mechanism and the segmented relay pushing avoid thrust concentration, which meets the large thrust requirements of the solid gravity energy storage power station with a large altitude difference under the condition of material strength limitation. Moreover, the continuous pushing process enables the gravity energy storage element to rise or fall continuously, just like water flow, maintaining continuous unidirectional movement in each functional time period. The equipment utilization efficiency is very high, which reduces the energy storage cost. This solid gravity flow carrier equipment can be used in terrains with large altitude differences. Compared with pumped storage, the altitude difference used is greater, which makes the mass energy density of the energy storage element higher, and can reduce the large amount of solid energy storage elements and land occupation. The use of solid gravity energy storage does not require water resources, and can adapt to the large altitude difference between the high altitude of the plateau and the low altitude of the basin (plain) in arid areas. Moreover, the terrain is rich in geographical resources and widely distributed, which can meet the resource guarantee of ultra-large-scale energy storage required for energy transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a right side view of an embodiment of a solid gravity flow carrying device of the present invention;

[0044] Figure 2 It is a right side view of a part of the structure of an embodiment of a solid gravity flow carrier of the present invention;

[0045] Figure 3 It is a schematic diagram of the principle of an embodiment of a solid gravity flow carrier of the present invention when it is applied to a gravity cascade power station;

[0046] Figure 4 A schematic diagram of the structural principle of a pushing mechanism of an embodiment of a solid gravity flow carrier of the present invention;

[0047] Figure 5 A top view of an inclined section of an embodiment of a solid gravity flow carrier of the present invention;

[0048] Figure 6 A structural cross-sectional view of a chain portion of an embodiment of a solid gravity flow carrying device of the present invention;

[0049] Figure 7 A cross-sectional view of a horizontal transfer mechanism portion of an embodiment of a solid gravity flow carrier of the present invention;

[0050] Figure 8 It is a right side view of an embodiment of a gravity energy storage element of the present invention;

[0051] Fig. 9 A front view of an embodiment of a gravity energy storage element of the present invention;

[0052] Fig.10 A block diagram of an embodiment of an energy storage system is provided;

[0053] Fig.11 A right side view of a low altitude storage yard of an embodiment of the inventive energy storage system.

[0054] The reference numerals in the figure are: 100, gravity energy storage element; 110, energy storage element body; 120, track wheel; 130, rack plate; 140, hook tooth; 141, hook; 142, inclined surface; 150, top push concave platform; 160, top push boss; 170, hook tooth groove; 171, roller groove; 180, hanging part; 181, lifting groove; 200, transfer track; 210, low altitude section; 220, high altitude section; 230, inclined section; 300, pushing mechanism; 310, chain transmission assembly; 311, driving sprocket; 312, driven sprocket; 313, chain; 314, driving shaft; 315, coupling; 316, pin shaft; 320, force transmission member; 32 1. Force transmission rod; 400. Electric energy to kinetic energy conversion mechanism; 410. Power grid; 500. Horizontal sliding mechanism; 510. Rail base; 520. Heightened rail platform; 530. Slideway; 540. Ram; 550. Telescopic assembly; 551. Telescopic tongue; 560. Linear motor; 561. Stator; 562. Mover; 600. Braking mechanism; 610. Brake drum; 620. Brake pad; 700. Low altitude yard; 710. High altitude yard; 720. Crane; 730. Cache section; 740. Loading and unloading section; 750. Yard; 800. System main controller; 810. Low altitude yard control assembly; 820. High altitude yard control assembly; 830. Converter. DETAILED DESCRIPTION

[0055] The present invention provides a solid gravity flow carrier, a gravity energy storage element and an energy storage system. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0056] In the existing technology, the existing energy storage technologies include physical energy storage such as pumped storage, compressed air storage, and flywheel storage; and chemical energy storage such as lead batteries, lithium batteries, sodium sulfur batteries, and flow batteries. Pumped storage can be applied to large-capacity energy storage, but the construction of pumped storage power stations requires the construction of reservoirs at high and low altitudes, and the geographical resources that can meet this terrain condition are extremely limited, and it is impossible to meet the geographical resource requirements for the site of the ultra-large-scale energy storage required by the energy transformation. The energy storage cost of chemical battery energy storage is relatively high. The cost of energy storage per kilowatt-hour is currently close to twice the on-grid electricity price of coal-fired power (0.6 yuan + ~ 0.80 yuan +), and there is no possibility of a cost per kilowatt-hour lower than the on-grid electricity price of coal-fired power in the long run. In addition to improving the operation of the power grid and taking advantage of the peak-valley electricity price arbitrage operation, chemical batteries are not economically feasible for energy transformation storage. There are also potential risks: if chemical batteries are still used to meet the ultra-large-scale energy storage required for energy transformation, the harm to the environment caused by the renewal and reproduction of chemical batteries will be difficult to estimate, and may even lead to a new environmental disaster.

[0057] It is a common sense in physics to use the transfer of gravity of objects between altitude differences to achieve energy storage and release. The pumped storage power station based on liquid fluidity is a specific application of this common sense in physics. There is no valuable engineering example of using the transfer of solid gravity between altitude differences to achieve energy storage and release. Among the existing technologies of gravity energy storage retrieved from patents, there is the use of winch technology to achieve transportation, but winch lifting technology is not suitable for energy storage applications. The rope-pulled winch lifts (lowers) heavy objects, and the rising and falling processes must be repeated each time, and the cycle takes a long time; a 200-meter-long track drags 500 50-ton weights in 8 hours, and each block takes 57.6 seconds, which shows that the equipment utilization efficiency is extremely low; and the winch lifting wire rope has a large loss, and the operation and maintenance cost is high. The appropriate range of the altitude difference of the scheme is 200 to 400 meters, and the theoretical energy density is 0.544 to 1.09wh / kg. Such a low energy density will require a large number of solid energy storage components. Based on a storage capacity of 100 million kWh, 9184.4232 to 18382.3529 million tons of solid heavy objects are needed as energy storage elements. According to the author's research, through energy transformation, my country will become an energy power, and the daily energy storage capacity will reach about 42 billion kWh. If the altitude difference used is only 200 to 400 meters, the solid heavy objects required for energy storage elements are 38.575 to 77.206 billion tons, which is impossible to achieve with existing technology.

[0058] Mountains are the most abundant natural form on earth, and solids are the most abundant substances on earth, which are very easy to shape according to process requirements. In terms of resource quantity, solid gravity energy storage is very suitable for ultra-large-scale energy storage. Therefore, a solid gravity flow carrier is proposed in this embodiment, which uses the transfer of solid gravity between altitude differences to achieve energy storage and release. Compared with chemical energy storage, there is no pollutant emission, and it is energy-saving and environmentally friendly. It not only solves the shortcomings of the existing pumped storage with high geographical environment requirements, but also solves the shortcomings of large engineering difficulties and low equipment utilization during the hoisting process. The details are as follows:

[0059] Example 1 Figure 1 , Figure 3As shown, in this embodiment, a solid gravity flow carrier is proposed for transferring gravity energy storage elements 100, which includes: a transfer track 200, a pushing mechanism 300, and an electric energy kinetic energy conversion mechanism 400. The transfer track 200 has a low altitude section 210 and a high altitude section 220 opposite to the low altitude section 210, and an inclined section 230 located between the low altitude section 210 and the high altitude section 220, wherein the low altitude section 210 and the high altitude section 220 are horizontal sections. If the device is set on a mountain, a flat land is set at the foot of the mountain for setting the low altitude section 210 of the transfer track 200. A flat land is set on the top of the mountain or on the hillside for setting the high altitude section 220 of the transfer track 200. The inclined section 230 of the transfer track 200 is set along the ridge, and the slope of the inclined section 230 is selected between 15 and 75 degrees according to the terrain conditions and engineering requirements. In this way, a lifting channel for the gravity energy storage element 100 is formed by the transfer track 200, and the gravity energy storage element 100 moves upward or downward in a direction on the transfer track 200. The pushing mechanism 300 is provided in plurality, and the plurality of pushing mechanisms 300 are arranged along the inclined section 230 of the transfer track 200. Specifically, each pushing mechanism 300 is usually spaced a distance apart to form a power section and a non-power section, and the pushing direction of each pushing mechanism 300 is in the same direction as the extension direction of the inclined section. The pushing mechanism 300 drives the gravity energy storage element 100 to move, and the electric energy-kinetic energy conversion mechanism 400 is connected to the pushing mechanism 300. The electric energy-kinetic energy conversion mechanism 400 can convert electrical energy into mechanical energy, such as a motor function, and can also convert mechanical energy into electrical energy, such as a generator function. When storing energy, the plurality of pushing mechanisms 300 are driven to move by the corresponding electric energy-kinetic energy conversion mechanisms 400, and drive the plurality of gravity energy storage elements 100 to be continuously pushed from the low altitude section 210 to the high altitude section 220 along the inclined section 230; when releasing energy, the plurality of pushing mechanisms 300 are driven to move by the gravity of the plurality of gravity energy storage elements 100, and drive the corresponding electric energy-kinetic energy conversion mechanisms 400 to convert mechanical kinetic energy into electrical energy, wherein the gravity is formed by the gravity energy storage elements 100 being continuously pushed from the high altitude section 220 to the low altitude section 210 along the inclined section 230 and then sliding down.

[0060] By setting the transfer track 200 in the above scheme, the gravity energy storage element 100 can be directed upward or downward along the transfer track 200. When storing energy, the electric energy kinetic energy conversion mechanism 400 converts electric energy into mechanical kinetic energy, drives the multiple pushing mechanisms 300 to move, and the movement of the multiple pushing mechanisms 300 drives the multiple gravity energy storage elements 100 that are abutting against each other in sequence to continuously push from the low altitude section 210 to the high altitude section 220 along the inclined section 230. When releasing energy, the gravity energy storage element 100 is continuously pushed from the high altitude section 220 to the low altitude section 210 along the inclined section 230 to slide down to form gravity, and the multiple pushing mechanisms 300 that are abutting against each other in sequence move through the gravity of the multiple gravity energy storage elements 100, and drive the corresponding electric energy kinetic energy conversion mechanism 400 to convert mechanical kinetic energy into electric energy and feed it into the power grid. Thus, the storage and release of electric energy are realized. When storing energy, the system absorbs the electric energy of the power grid and converts it into mechanical energy to push the gravity energy storage element 100 to a high place, forming gravitational potential energy for storage; when there is a shortage of electric energy, the gravitational potential energy of the gravity energy storage element 100 stored at a high place is converted into electric energy. Moreover, the multiple gravity energy storage elements 100 that are against each other in sequence throughout the entire process form a solid gravity flow when pushed, and the driving force required for the solid gravity flow on the entire transfer track 200 is very large. In conventional technology, a chain is used as a carrier, and the active sprocket outputs a torque, which is transmitted to the load of the entire process through the chain. For example, the inclined ladder in a supermarket, the chain must have enough strength to pull the entire heavy object up and bear the gravity of the entire process. In this way, the limited chain strength can only carry a limited gravity load, so places with large altitude differences cannot be used due to the limitation of the chain strength.

[0061] This solution realizes segmented series connection of multiple power sources through the segmented setting of the pushing mechanism 300, overcoming the problem that the limited chain strength can only carry a limited load. The altitude difference can no longer be restricted. Through the segmented (series) transmission of multiple pushing mechanisms 300, the solid gravity energy storage elements of the entire process can be segmented and connected in series, and relayed. Multiple gravity energy storage elements 100 can be pushed in segments, so that the pushing mechanism 300 only needs to be responsible for pushing some gravity energy storage elements 100 a distance, thereby avoiding the thrust concentration of the entire solid gravity flow. If the thrust of the solid gravity flow is concentrated, the structure of the entire pushing mechanism 300 is very strong, and the parts cannot withstand such concentrated thrust. The segmented pushing mechanism 300 disperses the power, so that under the condition of limited material strength, the total thrust requirement of the large altitude difference is met. Moreover, the continuous pushing process enables the gravity energy storage element 100 to rise or fall continuously, just like a water flow, maintaining continuous unidirectional uninterrupted movement within the functional time period, and its transportation efficiency is high and the equipment utilization efficiency is high.

[0062] In the specific structure of this embodiment, for the convenience of structural description, the inclined direction of the inclined section 230 is from front to back along the direction from bottom to top. Then the low altitude section 210 is located at the front bottom, and the high altitude section 220 is located at the back top. The direction perpendicular to the front-back direction and the up-down direction is the left-right direction. The following descriptions of each structure are all based on this direction setting as a reference.

[0063] like Figure 1 , Figure 7 As shown, the solid gravity flow carrier equipment also includes a horizontal push mechanism 500, which is arranged on the low altitude section 210 and the high altitude section 220 of the transfer track 200. Taking the energy storage process as an example, the horizontal push mechanism 500 on the low altitude section 210 transports the gravity energy storage element 100 to the pushing mechanism 300, and the gravity energy storage element 100 is continuously pushed along the inclined section 230 by the multi-stage pushing mechanism 300, so that the gravity energy storage element 100 is pushed up successively on the transfer track 200, and after being pushed to the high altitude section 220, the horizontal push mechanism 500 on the high altitude section 220 transports the gravity energy storage element 100 horizontally away. In this way, rapid energy storage is achieved.

[0064] A rail base 510 is laid on the ground, and two elevated rail platforms 520 are laid on the rail base 510. The two elevated rail platforms 520 are respectively arranged on the left and right sides in a mirror-symmetrical manner. Two transfer rails 200 are arranged, and the two transfer rails 200 are respectively arranged on the elevated rail platforms 520 on the left and right sides. The horizontal push mechanism 500 in this embodiment includes: a slide 530, a ram 540, a telescopic component 550, and a linear motor 560. The slide 530 is arranged in the same direction as the transfer rail 200, and two slides 530 are arranged. The two slides 530 are respectively arranged on the elevated rail platforms 520 on the left and right sides. The slide 530 is located on the steps inside the elevated rail platform 520, so that the slide 530 is lower than the transfer rail 200. By setting the elevated rail platform 520, there is enough space between the two transfer rails 200 to install the horizontal push mechanism 500, so that the structure is reasonable and the system is more stable. The ram 540 is slidably disposed on the slideway 530, and the cross-sectional shape of the contact surface between the ram 540 and the slideway 530 is V-shaped, so that the inner wall of the contact surface on the ram 540 limits the slideway 530, thereby making the ram 540 and the slideway 530 move more stably. The telescopic assembly 550 is disposed on the ram 540, and is connected to or disconnected from the gravity energy storage element 100 by telescoping. The linear motor 560 is disposed below the ram 540 and is connected to the ram 540. Specifically, the stator 561 of the linear motor 560 is laid along the extension direction (forward and backward direction) of the transfer track 200, and the mover 562 of the linear motor 560 moves along the forward and backward direction under the drive of the stator 561, so that the mover 562 drives the slide 540 to move along the forward and backward direction. The telescopic tongue 551 on the telescopic assembly 550 arranged on the slide 540 can be telescoped up and down, and a slot matching the telescopic tongue 551 is arranged at the bottom of the gravity energy storage element 100 (not marked in the figure). When the gravity energy storage element 100 is placed on the transfer track 200, the telescopic assembly 550 raises the telescopic tongue 551 and inserts it into the bottom slot, thereby connecting the gravity energy storage element 100 to the ram 540, and the gravity energy storage element 100 is driven to move in the front-back direction by the movement of the ram 540. When the gravity energy storage element 100 is moved to the pushing mechanism 300 on the inclined section 230, the telescopic assembly 550 lowers the telescopic tongue 551, and the pushing mechanism 300 pushes the gravity energy storage element 100 obliquely upward. It is easy to imagine that the horizontal push mechanism 500 can also be a chain transmission mechanism, a ball screw push mechanism, etc.

[0065] like Figure 2 , Figure 4 , Figure 5As shown, the pushing mechanism 300 in this embodiment includes two chain transmission components 310 located on the left and right sides, and a force transmission member 320 arranged between the two chain transmission components 310, and the force transmission member 320 is used to connect the gravity energy storage element 100. The rotation of the chain transmission component 310 drives the force transmission member 320 to move, so that the gravity energy storage element 100 is pushed by the force transmission member 320. The gravity energy storage element 100 is continuously pushed up. The chain transmission component 310 includes: a driving sprocket 311, a driven sprocket 312, and a chain 313 sleeved on the driving sprocket 311 and the driven sprocket 312, and the chain 313 is arranged along the extension direction of the inclined section 230. The force transmission member 320 is connected to the chains 313 on both sides. In addition, in order to realize the transmission function of the chain transmission assembly 310, a base (not shown in the figure) is arranged on the rail base 510, and a bearing support is arranged on the base, and a driving shaft 314 and other mechanical components are arranged on the bearing support. The driving shaft 314 connects the electric energy kinetic energy conversion mechanism 400 and the driving sprocket 311. During energy storage, the power grid supplies power to the electric energy kinetic energy conversion mechanism 400 through the converter, and the electric energy kinetic energy conversion mechanism 400 converts the electric energy input from the power grid 410 into a rotating mechanical power, which is transmitted to the driving shaft 314 through the coupling 315. The driving shaft 314 drives the driving sprocket 311 to rotate, and the rotating driving sprocket 311 drives the chain 313 to rotate, and the chain 313 drives the force transmission member 320 to move cyclically along the inclined direction, thereby converting the rotational motion into an upward linear motion, and the gravity energy storage element 100 is pushed to move upward along the slope through the force transmission member 320. When releasing energy, the gravity energy storage element 100 moves linearly downward along the inclined section 230 of the transfer track 200 under the action of gravity, and the gravity energy storage element 100 drives the force transmission member 320 to move, and the force transmission member 320 drives the chain 313 to move, thereby driving the driving sprocket 311 to rotate, and then drives the driving shaft 314 to rotate, converting the linear motion into rotational motion to drive the electric energy kinetic energy conversion mechanism 400. At this time, the electric energy kinetic energy conversion mechanism 400 is in a power generation state, converting mechanical rotational power into electric energy and inputting it into the power grid 410. The energy conversion element of the electric energy kinetic energy conversion mechanism adopts a rotary motor, and the energy conversion efficiency of the rotary motor is higher than that of the linear motor, so the energy conversion efficiency is higher.

[0066] like Figure 4 , Figure 5 As shown, the driving sprockets 311 of the two chain transmission assemblies 310 in this embodiment are both connected to the driving shaft 314, so that the driving sprockets 311 on the left and right sides are synchronously driven to rotate synchronously through a driving shaft 314, so as to realize synchronous conveying of the chains 313 on the left and right sides. In addition, the two driven sprockets 312 on the left and right sides are also connected through a rod shaft, so that the two driven sprockets 312 can realize synchronous rotation.

[0067] like Figure 4 As shown, the pushing mechanism 300 is provided with a brake mechanism 600, and the brake mechanism 600 includes: a brake drum 610, and a brake pad 620. The brake drum 610 is connected to the end of the driving shaft 314 away from the electric energy kinetic energy conversion mechanism 400, and the brake pad 620 is used to abut against the brake drum 610. The specific working principle is: the electric energy kinetic energy conversion mechanism 400 drives the driving shaft 314 to rotate after power is turned on. When the driving shaft 314 needs to stop, that is, the chain drive assembly 310 stops transmission, then when the electric energy kinetic energy conversion mechanism 400 is powered off, due to inertia, the driving shaft 314 will not stop rotating immediately. In addition, due to the gravity of the gravity energy storage element 100 on the transfer track, it will move downward, and the lifting channel needs to be stopped by the brake mechanism 600, so the brake mechanism 600 is started to make the brake pad 620 hold the brake drum 610 tightly, so that the driving shaft 314 is locked and braked. The chain drive assembly 310 stops transmission immediately.

[0068] It is easy to imagine that the electric energy-kinetic energy conversion mechanism 400 can be a motor and a generator that are separately arranged (not shown in the figure), and the motor and the generator can be connected to the driving shaft 314 through a clutch, so that when energy storage is required, the clutch is started to connect the motor to the driving shaft 314, and the motor drives the driving shaft 314 to rotate after power is turned on, thereby realizing the rotation of the chain drive assembly 310 and driving the gravity energy storage element 100 to rise. When energy release is required, the clutch is started to connect the generator to the driving shaft 314, and the gravity energy storage element 100 descends, driving the chain drive assembly 310 to move, and then driving the generator to rotate through the driving shaft 314, so that the generator generates electricity. In this embodiment, the structure is optimized, and the motor and the generator adopt the same structure. When power is turned on, the function of the motor is realized, and the driving shaft 314 is driven to rotate. In addition, when the driving shaft 314 rotates due to the drive of the gravity energy storage element 100, the function of the generator is realized.

[0069] Embodiment 2

[0070] like Figure 8 , Fig. 9As shown, based on the same concept, on the basis of the first embodiment, the present invention also proposes a gravity energy storage element 100, which is used for the solid gravity flow carrying equipment as described above; the gravity energy storage element 100 is used in conjunction with the force transmission member 320, and the gravity energy storage element 100 includes an energy storage element body 110, and a track wheel 120. The track wheel 120 is rotatably arranged on the energy storage element body 110, and moves against the transfer track 200. The track wheel 120 is provided with a plurality of tracks, and the plurality of track wheels 120 respectively abut against the transfer tracks 200 on both sides. In this way, the energy storage element body 110 is supported by the track wheel 120, and the friction of the energy storage element body 110 on the transfer track 200 is reduced, so that the energy storage element body 110 can move more stably on the transfer track 200.

[0071] The gravity energy storage element 100 can be a formed solid weight block, and the weight is divided into multiple standard grades from 20 to 200 tons according to the configuration of different energy storage power station units. The material selection can be a cast steel part, a concrete component, or a structural part with other solid materials filled inside the steel component shell. In addition, the gravity energy storage element 100 can also be a shell with an inner cavity, and the gravity energy storage element 100 is formed by filling the shell with a medium, such as water, sand and gravel available in nature, so that the manufacturing cost of the gravity energy storage element 100 can be saved.

[0072] like Figure 6 As shown, the force transmission member 320 in the solid gravity flow carrier in the first embodiment includes a force transmission rod 321, and the force transmission rod 321 is provided with a plurality of force transmission rods 321. The left and right sides of the force transmission rod 321 are respectively connected to the chains 313 on the left and right sides through the pin 316 by an interference fit connection method. In this way, the connection structure is simple and firmly fixed, and the position of the force transmission rod 321 on the chain 313 is not easily deformed. It is easy to think that the force transmission member 320 can also be other force transmission structures, such as a hook, a push plate, etc.

[0073] like Figure 8As shown, the gravity energy storage element 100 also includes: a hook tooth 140 arranged on the energy storage element body 110. The hook tooth 140 hooks the force transmission rod 321 and transmits torque. In the specific structure, a rack plate 130 is arranged at the bottom of the energy storage element body 110, and a plurality of the hook teeth 140 are arranged on the rack plate 130, and the hook 141 of the hook tooth 140 is oriented toward the side of the low altitude section 210, that is, the hook 141 of the hook tooth 140 is oriented forward. In this way, when the chain drive assembly 310 drives the force transmission rod 321 to move, it moves in a direction from bottom to top, so that the force transmission rod 321 can move to the position of the hook tooth 140, and hook into the hook 141 of the hook tooth 140, thereby pushing the energy storage element body 110 to move upward. When the energy storage element body 110 slides down, the hook tooth 140 slides to the position of the force transmission rod 321, and the hook 141 of the hook tooth 140 abuts against the force transmission rod 321, thereby driving the working chain 313 to rotate. The side of the hook tooth 140 facing the high altitude section 220 is provided with an inclined surface 142, and the inclined surface 142 is inclined from front to back along the direction from bottom to top. Such an inclined arrangement makes the connection structure strength between the hook tooth 140 and the rack plate 130 high, the hook tooth 140 is not easy to break, and the inclined surface 142 is not easy to interfere with the force transmission rod 321 on the chain 313.

[0074] like Figure 8 As shown, one end of the energy storage element body 110 in this embodiment is provided with a push concave platform 150, and the other end is provided with a push convex platform 160. The push concave platform 150 of one of the gravity energy storage elements 100 is used to abut against the push convex platform 160 of another adjacent gravity energy storage element 100. In the specific structure, when the gravity energy storage element 100 is pushed, multiple gravity energy storage elements 100 are abutted in sequence. When the lowest gravity energy storage element 100 is pushed by the pushing mechanism 300 or the horizontal push mechanism 500, the multiple gravity energy storage elements 100 abutting against each other can be pushed at the same time, so that continuous push is formed between the multiple gravity energy storage elements 100. Therefore, the front end face and the rear end face of the energy storage element body 110 are respectively provided with a push convex platform 160 and a push concave platform 150. The top surface of the push convex platform 160 is a convex spherical surface. The top surface of the push recess 150 is a concave spherical surface. In this way, the push boss 160 with a convex spherical surface can be embedded in the push recess 150 with a concave spherical surface, so that multiple gravity energy storage elements 100 can be smoothly abutted in sequence. In addition, the push boss 160 with a convex spherical surface can have a certain rotational activity space in the push recess 150 with a concave spherical surface, so that the gravity energy storage element 100 can still maintain the abutment state when transitioning from the low altitude section 210 to the inclined section 230, and from the inclined section 230 to the high altitude section 220, so as to achieve a smooth transition.

[0075] The upper surface of the gravity energy storage element 100 is provided with a hook tooth groove 170 and a roller groove 171. When the gravity energy storage elements 100 are stacked, the hook tooth groove 170 is used to accommodate the hook teeth 140 of another adjacent gravity energy storage element 100, and the roller groove 171 is used to accommodate the track wheel 120 of another adjacent gravity energy storage element 100. This makes it easy to stack the gravity energy storage elements 100.

[0076] The left and right sides of the gravity energy storage element 100 are respectively provided with hanging parts 180. The hanging parts 180 can facilitate the transportation of the gravity energy storage element 100. For example, after reaching the high altitude section 220, the hanging part 180 can be hooked by a crane to transfer the gravity energy storage element 100 out of the transfer track 200 and move it to a special stacking area. The hanging part 180 in this embodiment is a hoisting groove 181, and the hoisting groove 181 is provided with a plurality of them, and is respectively opened on the upper four corners of the left and right sides of the gravity energy storage element 100. The upper groove wall of the hoisting groove 181 is parallel to the horizontal plane or inclined. If it is inclined, it is inclined from the bottom to the top in the direction of the notch inward. This is more secure during hoisting and more convenient for hoisting.

[0077] Therefore, the working principle of the above embodiment is as follows: when energy storage is required, the electric energy-kinetic energy conversion mechanism 400 is powered on and operates as a motor, converting the electric energy of the power grid 410 into the kinetic energy of the upward displacement of the gravity energy storage element 100, and pushing the gravity energy storage element 100 from a low altitude to a high altitude. The electric energy-kinetic energy conversion mechanism 400 transmits the mechanical rotational power to the pushing mechanism 300 through the coupling 315, and the pushing mechanism 300 drives the driving sprockets 311 on the left and right sides to rotate through the driving shaft 314, and then converts the rotational motion into an upward unidirectional linear motion through the chain 313; the rotating chains 313 on the left and right sides transmit the torque to the force transmission rod 321 through the pin shaft 316, and the force transmission rod 321 is hooked and engaged with the hook teeth 140 at the bottom of the gravity energy storage element 100, pushing the gravity energy storage element 100 to move upward; the upward movement force is transmitted to the adjacent upper gravity energy storage element 100 through the rear pushing boss 160 of the gravity energy storage element 100 that abuts against each other in turn. The front push concave platform 150 of the energy storage element 100 contacts and transmits thrust, and transmits the upward force to the previous gravity energy storage element 100, pushing the previous gravity energy storage element 100 to move upward; from the entire inclined end between the low altitude section 210 and the high altitude section 220, the rear push convex platform 160 of the next gravity energy storage element 100 is connected to the front push concave platform 150 of the previous gravity energy storage element 100, extending from the entrance of the low altitude section 210 to the exit of the high altitude section 220, and under the power drive of the pushing mechanism 300 on the inclined section 230, the gravity energy storage element 100 is continuously pushed from the low altitude section 210 to the high altitude section 220. The gravity energy storage element 100 absorbs the kinetic energy from the low altitude to the high altitude to form the potential energy of the potential difference, and realizes energy storage.

[0078] When energy storage is required, the pushing mechanism 300 runs in reverse. On the inclined section 230 of the transfer track 200, the gravity energy storage elements 100 are connected end to end and push along the inclined section 230 of the transfer track 200 to continuously move linearly toward the low altitude section 210 under the action of gravity. In the inclined section 230, the hook teeth 140 at the bottom of the gravity energy storage element 100 mesh with the force transmission rod 321 on the chain drive assembly 310, and the gravity of the entire gravity energy storage element 100 on the inclined section 230 of the transfer track 200 is transmitted to the chain 313 through the force transmission rod 321, pulling the chain 313 to make a linear motion constrained by the inclined transfer track 200, and the chain 313 pulls the driving sprocket 311, which is converted into a rotational motion of the driving sprocket 311. The driving sprocket 311 is coaxially connected to the electric energy kinetic energy conversion mechanism 400 through the driving shaft 314 and the coupling 315. The rotating mechanical power drives the electric energy kinetic energy conversion mechanism 400 to rotate and generate electricity. The winding of the electric energy kinetic energy conversion mechanism 400 is electrically connected to the access device of the power grid 410, and the power is fed back into the power grid 410.

[0079] Embodiment 3

[0080] like Fig.10 As shown, based on the same concept, on the basis of embodiment 1 or embodiment 2, the present invention further proposes an energy storage system, comprising the solid gravity flow carrier as described above, and a plurality of gravity energy storage elements 100, a low altitude yard 700 and a high altitude yard 710; the gravity energy storage element 100 is separated from or connected to the pushing mechanism 300, the low altitude section 210 runs through the low altitude yard 700, and the high altitude section 220 runs through the high altitude yard 710. When the energy storage system stores energy, the low altitude yard 700 is used to push the gravity energy storage element 100 to the low altitude section 210, and the high altitude yard 710 is used to receive and store the gravity energy storage element 100 from the high altitude section 220. When the energy storage system releases energy, the high altitude yard 710 is used to transport the gravity energy storage element 100 to the high altitude section 220, and the low altitude yard 700 is used to receive and store the gravity energy storage element 100 from the low altitude section 210. In this way, the space can be fully utilized to store more gravity energy storage elements 100.

[0081] like Fig.11 As shown, the low altitude storage yard 700 and the high altitude storage yard 710 are both equipped with a crane 720 for loading, unloading and stacking the gravity energy storage elements 100, and the crane 720 is vertically arranged along the extension direction of the transfer track 200. There are multiple cranes 720, and the multiple cranes 720 alternately load or unload the gravity energy storage elements 100 on the transfer track 200 to ensure the formation of the solid gravity flow of the lifting channel.

[0082] The low altitude yard 700 and the high altitude yard 710 of the gravity energy storage element 100 are respectively located at the low altitude and high altitude ends of the lifting channel formed by the transfer track 200. The low altitude section 210 of the transfer track 200 is set on the low altitude yard 700, and the high altitude section 220 of the transfer track 200 is set on the high altitude yard 710. The low altitude section 210 and the high altitude section 220 are respectively connected to the middle inclined section 230, thereby forming a connecting channel for the gravity energy storage element 100 from the low altitude yard 700 to the high altitude yard 710. The high and low altitude yards 700 of the gravity energy storage element 100 have the same basic structure and equipment configuration. A crane 720 for loading, unloading and stacking the gravity energy storage element 100 is installed on the energy storage element yard. The crane 720 is arranged vertically along the extension direction of the transfer track 200; the number of arrangements is designed according to the energy storage scale, and each yard has no less than 20 rows of crane 720 working areas. Each crane 720 work area is provided with two cranes 720, and the two cranes 720 alternately unload the gravity energy storage elements 100 on the transfer track 200 and transfer them to the stacking position. The low-altitude yard 700 and the high-altitude yard 710 are both provided with a loading and unloading section 740, a cache section 730, and a yard 750, which are preferably located on a flat site. However, it can also be built according to the terrain conditions. The loading and unloading section 740 is arranged on one side of the inclined section 230 close to the transfer track 200, and is used to move the gravity energy storage element 100 on the transfer track 200 to the cache section 730. The cache section 730 is used to cache the gravity energy storage element 100 that will be transported or transported, and the yard 750 is arranged on the side away from the inclined section 230, and is used to store the gravity energy storage element 100.

[0083] like Fig.10 As shown, the energy storage system also includes a system main controller 800, a low altitude yard control component 810 and a high altitude yard control component 820. The low altitude yard control component 810 is used to control the operation of equipment in the low altitude yard, and the high altitude yard control component 820 is used to control the operation of equipment in the high altitude yard. The system main controller 800 is electrically connected to the low altitude yard control component 810 and the high altitude yard control component 820, respectively, and controls the low altitude yard control component and the high altitude yard control component respectively. The electric energy kinetic energy conversion mechanism 400 is electrically connected to the converter 830, and the converter 830 is electrically connected to the system main controller 800 and the power grid 410, respectively. Automatic control of the energy storage system is realized.

[0084] In summary, the present invention proposes a solid gravity flow carrier, a gravity energy storage element and an energy storage system, wherein, by laying a transfer track 200, the gravity energy storage element 100 can be directed upward or downward along the transfer track 200. When storing energy, the electric energy kinetic energy conversion mechanism 400 converts electric energy into mechanical kinetic energy, drives the movement of the plurality of pushing mechanisms 300, and the movement of the plurality of pushing mechanisms 300 drives the plurality of gravity energy storage elements 100 to be continuously pushed from the low altitude section 210 to the high altitude section 220 along the inclined section 230. When releasing energy, the gravity energy storage element 100 is continuously pushed from the high altitude section 220 to the low altitude section 210 along the inclined section 230 to slide down to form a gravity effect, and the plurality of pushing mechanisms 300 move through the gravity effect of the plurality of gravity energy storage elements 100, and drive the corresponding electric energy kinetic energy conversion mechanism 400 to convert mechanical kinetic energy into electric energy. Thus, the storage and release of electric energy are realized. When the electric energy is sufficient, the electric energy is converted into mechanical energy to push the gravity energy storage element 100 to a high place, forming gravitational potential energy for storage; when the electric energy is short, the gravity energy release of the gravity energy storage element 100 stored at a high place is converted into electric energy. Moreover, when multiple gravity energy storage elements 100 are pushed, a solid gravity flow is formed, and the driving force required for the solid gravity flow on the entire transfer track 200 is very large. Therefore, the pushing mechanism 300 is set in sections, and multiple gravity energy storage elements 100 can be pushed in sections. In this way, the pushing mechanism 300 only needs to be responsible for pushing some gravity energy storage elements 100 a certain distance, thereby avoiding the thrust concentration of the entire solid gravity flow. If the thrust of the solid gravity flow is concentrated, the current technology cannot provide enough power, and the structure of the entire pushing mechanism 300 is very strong, and the parts cannot withstand such concentrated thrust. The push mechanism 300 set in sections avoids thrust concentration, reduces the structural burden, enhances the stability of the equipment, and the equipment is not easy to break, reducing maintenance costs. Moreover, the continuous pushing process enables the gravity energy storage element 100 to rise or fall continuously, just like water flow, maintaining continuous uninterrupted movement in one direction within the functional time period, and the equipment utilization efficiency is high. Moreover, this solid gravity flow carrier can be laid directly on the slope of a mountain, or it can be laid by forming a high-altitude height difference structure. Compared with pumped storage, it has low terrain requirements and wide applicability. Therefore, the rich terrain and geographical resources with large altitude differences between the high altitude of the plateau and the low altitude of the basin (plain) are utilized to meet the resource guarantee of ultra-large-scale energy storage required for energy transformation. At the same time, the altitude difference is maximized to improve the energy density per unit mass, so as to reduce the use of solid energy storage elements and land occupation. In addition, this carrier does not require frequency conversion and speed change devices, has a simple structure, and minimizes engineering investment and daily maintenance costs.

[0085] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A solid gravity flow carrier for transferring gravity energy storage elements, characterized in that: include: a transfer track having a low altitude section and a high altitude section opposite to the low altitude section, and an inclined section between the low altitude section and the high altitude section, and used for directional movement of the gravity energy storage element; A pushing mechanism, wherein a plurality of the pushing mechanisms are provided, and the plurality of the pushing mechanisms are provided along the inclined section of the transfer track; An electric energy-kinetic energy conversion mechanism, wherein the electric energy-kinetic energy conversion mechanism is provided in plurality and correspondingly connected to a plurality of the pushing mechanisms; The plurality of pushing mechanisms are driven by the corresponding electric energy-kinetic energy conversion mechanisms to move, and drive the plurality of gravity energy storage elements that are abutted in sequence to be continuously pushed along the inclined section from the low altitude section to the high altitude section; or The plurality of pushing mechanisms move through the gravity of the plurality of gravity energy storage elements abutting against each other in sequence, and drive the corresponding electric energy-kinetic energy conversion mechanisms to convert mechanical kinetic energy into electric energy, wherein the gravity is formed by the gravity energy storage elements continuously pushing down from the high altitude section to the low altitude section along the inclined section; The pushing mechanism comprises two chain transmission assemblies located on both sides, and a force transmission member arranged between the two chain transmission assemblies; The chain transmission assembly comprises: a driving sprocket, a driven sprocket, and a chain sleeved on the driving sprocket and the driven sprocket, wherein the chain is arranged along the extending direction of the inclined section; The force transmission member is connected to the chains on both sides and is used to connect the gravity energy storage element; The force transmission member includes a force transmission rod, and a plurality of force transmission rods are provided. The left and right sides of the plurality of force transmission rods are respectively connected to the chains on the left and right sides by means of an interference fit connection method through a pin shaft; the force transmission rod transmits torque by hooking the hook teeth on the gravity energy storage element; The pushing mechanism also includes a driving shaft, and the driving sprockets of the two chain transmission assemblies are both connected to the driving shaft; The electric energy to kinetic energy conversion mechanism is connected to the driving shaft; The pushing mechanism is provided with a braking mechanism, and the braking mechanism comprises: a brake drum connected to an end of the driving shaft away from the electric energy to kinetic energy conversion mechanism; a brake pad, the brake pad being used to abut against the brake drum; The solid gravity flow carrier further comprises a horizontal push mechanism, which is arranged at the low altitude section and the high altitude section of the transfer track; The horizontal push mechanism comprises: a slideway, the slideway and the transfer track are arranged in the same direction; A ram, wherein the ram is slidably disposed on the slideway; a telescopic assembly, the telescopic assembly being disposed on the ram and being connected to or disconnected from the gravity energy storage element by telescoping; and A linear motor is disposed below the ram and connected to the ram.

2. A gravity energy storage element, characterized in that: Used in the solid gravity flow carrying device as claimed in claim 1; The gravity energy storage element comprises: an energy storage element body, and hook teeth arranged on the energy storage element body; The hook teeth hook the force transmission rod and transmit the torque.

3. The gravity energy storage element according to claim 2, characterized in that: One end of the energy storage element body is provided with a push concave platform, and the other end is provided with a push convex platform; The pushing concave platform of one of the gravity energy storage elements is used to abut against the pushing convex platform of another adjacent gravity energy storage element.

4. The gravity energy storage element according to claim 2, characterized in that: The gravity energy storage element further comprises: a track wheel, the track wheel being rotatably arranged on the energy storage element body and moving against the transfer track; The transfer tracks are provided with two groups, and the two groups of transfer tracks are located at the left and right sides. The track wheels are provided with a plurality of tracks, and the plurality of track wheels respectively abut against the transfer tracks at the two sides.

5. The gravity energy storage element according to claim 2, characterized in that: The upper surface of the gravity energy storage element is provided with a hook tooth groove and a roller groove; When the gravity energy storage elements are stacked, the hook tooth recess is used to accommodate the hook tooth of another adjacent gravity energy storage element, and the roller recess is used to accommodate the track wheel of another adjacent gravity energy storage element; The left and right sides of the gravity energy storage element are respectively provided with hanging parts.

6. An energy storage system, characterized in that: The solid gravity flow carrier device comprises the solid gravity flow carrier device as claimed in claim 1, and a plurality of gravity energy storage elements, a low altitude yard and a high altitude yard; the gravity energy storage element is separated from or connected to the pushing mechanism, the low altitude section runs through the low altitude yard, and the high altitude section runs through the high altitude yard; When the energy storage system is storing energy, the low altitude yard is used to transport the gravity energy storage elements to the low altitude section, and the high altitude yard is used to receive and store the gravity energy storage elements from the high altitude section; When the energy storage system releases energy, the high-altitude yard is used to transport the gravity energy storage elements to the high-altitude section, and the low-altitude yard is used to receive and store the gravity energy storage elements from the low-altitude section.

7. The energy storage system according to claim 6, characterized in that: The low-altitude stack and the high-altitude stack are both equipped with cranes for loading, unloading and stacking gravity energy storage elements, and the cranes are arranged vertically along the extension direction of the transfer track; The traveling cranes are provided with a plurality of cranes, and the plurality of traveling cranes alternately load or unload the gravity energy storage elements on the transfer track.

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