Solid gravity flow carrier apparatus and energy storage system

Abstract

A solid gravity flow carrying device (1000) is provided with a power drop (131) through a gravity energy storage element moving track (100), a gravity energy storage element (900) passes through the power tunnel (131), a bottom mover (310), a top mover (320) and a side mover (330) are respectively electromagnetically coupled with a bottom stator (210), a top stator (220) and a side stator (230), a plurality of gravity energy storage elements (900) are continuously pushed to form a solid gravity flow synchronous rise to convert electric energy into power, thereby changing potential energy and storing; a plurality of gravity energy storage elements (900) are continuously pushed to form a solid gravity flow to descend, convert gravity potential energy into electric energy, and feedback to the power grid. In this way, environment-friendly low-cost energy storage is realized. In addition, a solid gravity flow carrying device energy storage system is also involved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gravity energy storage, in particular to a solid gravity flow carrying device and an energy storage system. BACKGROUND

[0002] Energy is the material basis for human survival and social development, and ensuring adequate energy supply is a necessary condition for people's happy life. The sun is eternal and inexhaustible, and if it can become the ultimate energy source for human beings, humans will no longer worry about the depletion of fossil energy and will no longer be anxious about the deterioration of the environment due to the use of fossil energy.

[0003] However, solar energy has practical obstacles. Due to the rotation of the earth, there are day and night, and due to the revolution of the earth, there are seasonal differences in sunlight intensity. In addition, the nature of the land and the sea on the surface of the earth, and the changes in the terrain, etc. cause water vapor evaporation, air convection, overcast days, rain, etc. The intermittent day and night, seasonal differences in winter and summer, and weather changes on overcast days and rain all hinder the practicality of solar energy.

[0004] Through energy storage, the time and space of solar energy can be moved, so that it can be used stably at any time. However, as the ultimate energy source for human use, solar energy has a huge value, and the energy storage required to balance the day and night difference, seasonal difference, and weather difference needs to be supported by a super large-scale energy storage system; and a huge energy storage resource is needed to ensure the energy storage. Energy is the basic material for human survival and social development, and its economy is extremely sensitive, so low-cost energy storage is a necessary condition; due to the huge amount of energy storage required to balance the day and night difference, seasonal difference, and weather difference, the industry related to it and its daily operation must be environmentally friendly.

[0005] At present, there are many physical and chemical energy storage technologies, but pumped storage is the main one. As of 2017, more than 96% of the world's energy storage installations were pumped storage, and more than 99% of China's energy storage installations were pumped storage. The main purpose of existing energy storage projects is to optimize peak shaving and valley filling for power grid operation, and the scale is limited; accordingly, the geographical resources available for the construction of pumped storage power stations are very scarce, and the selection of power station sites is becoming increasingly difficult. Although chemical energy storage projects have increased in recent years, if chemical batteries are used to meet the huge scale of energy storage required for energy transformation, they do not have practicality in terms of resource guarantee, economy, and environmental tolerance. Therefore, the existing physical and chemical energy storage technologies cannot meet the requirements of super large scale for the purpose of energy transformation. SUMMARY

[0006] The embodiment of the present application provides a solid gravity flow carrying device, wherein the solid gravity flow carrying device comprises a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator group and a linear motor rotor group, the gravity energy storage element moving track is used for guiding the lifting movement of the gravity energy storage elements, the gravity energy storage element moving track has 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, the inclined section is provided with a power tunnel, the power tunnel has a tunnel bottom, a tunnel top opposite to the tunnel bottom and two tunnel sides, the linear motor stator group comprises a bottom stator fixed to the tunnel bottom, a top stator fixed to the tunnel top and a side stator fixed to the tunnel side, the linear motor rotor group comprises a bottom rotor, a top rotor and a side rotor fixed to each gravity energy storage element, the bottom rotor, the top rotor and the side rotor are respectively fixed to the bottom, the top and the side of the gravity energy storage element, when a plurality of gravity energy storage elements are continuously pushed into the power tunnel from the low-altitude section, the bottom rotor, the top rotor and the side rotor are electromagnetically coupled with the bottom stator, the top stator and the side stator respectively to convert electric energy into driving power to drive the plurality of gravity energy storage elements to continuously push and move to the high-altitude section, when a plurality of gravity energy storage elements are continuously pushed into the power tunnel from the high-altitude section, the plurality of gravity energy storage elements continuously push and move through the power tunnel under the action of gravity, the bottom rotor, the top rotor and the side rotor are electromagnetically coupled with the bottom stator, the top stator and the side stator respectively to convert mechanical kinetic energy into electric energy, and the plurality of gravity energy storage elements continuously push and move to the low-altitude section to be lifted to the power tunnel of the high-altitude section again next time.

[0007] The embodiment of the present application provides a solid gravity flow carrying device, wherein the solid gravity flow carrying device comprises a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator group and a linear motor rotor group, the gravity energy storage element moving track is used for guiding the lifting movement of the gravity energy storage elements, the gravity energy storage element moving track has 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, the inclined section is provided with a power tunnel, the power tunnel has a tunnel bottom, a tunnel top opposite to the tunnel bottom and two tunnel sides, the linear motor stator group comprises a bottom stator fixed to the tunnel bottom, a top stator fixed to the tunnel top and a side stator fixed to the tunnel side, the linear motor rotor group comprises a bottom rotor, a top rotor and a side rotor fixed to each gravity energy storage element, the bottom rotor, the top rotor and the side rotor are respectively fixed to the bottom, the top and the side of the gravity energy storage element, when a plurality of gravity energy storage elements are continuously pushed into the power tunnel from the low-altitude section, the bottom rotor, the top rotor and the side rotor are electromagnetically coupled with the bottom stator, the top stator and the side stator respectively to convert electric energy into driving power to drive the plurality of gravity energy storage elements to continuously push and move to the high-altitude section, when a plurality of gravity energy storage elements are continuously pushed into the power tunnel from the high-altitude section, the plurality of gravity energy storage elements continuously push and move through the power tunnel under the action of gravity, the bottom rotor, the top rotor and the side rotor are electromagnetically coupled with the bottom stator, the top stator and the side stator respectively to convert mechanical kinetic energy into electric energy, and the plurality of gravity energy storage elements continuously push and move to the low-altitude section to be lifted to the power tunnel of the high-altitude section again next time.

[0008] The solid gravity flow carrying device and energy storage system provided by the embodiment of the application, a power tunnel is arranged on a gravity energy storage element moving track, a linear motor stator group includes a bottom stator fixed on the bottom of the tunnel, a top stator fixed on the top of the tunnel and a side stator fixed on the side of the tunnel, a linear motor rotor group includes a bottom rotor, a top rotor and a side rotor fixed on each gravity energy storage element, the bottom rotor, the top rotor and the side rotor are respectively fixed on the bottom, the top and the side of the gravity energy storage element, the bottom rotor, the top rotor and the side rotor are respectively electromagnetically coupled with the bottom stator, the top stator and the side stator, a plurality of gravity energy storage elements are continuously pushed to form a solid gravity flow to synchronously rise, so as to convert electric energy into power, thereby changing potential energy and storing; a plurality of gravity energy storage elements are continuously pushed to form a solid gravity flow to descend, so as to convert gravitational potential energy into electric energy and feedback to the power grid.

[0009] The purpose of the application is to realize complete energy transformation, and to realize a super large scale energy storage technology with sufficient resource guarantee, superior economy and environmental friendliness, so as to realize the ultimate energy of solar energy for human beings.

[0010] The application utilizes the large altitude difference between high altitude plateau and high mountain and surrounding low altitude basin and low land to change the form of solid gravity potential energy to realize energy storage; such terrain has extremely rich geographical resources, thereby solving the resource guarantee problem of super large scale energy storage under the condition of complete energy transformation.

[0011] The application creates the technical concept (technical method) of solid gravity flow, so that the solid heavy object is fluidized, a plurality of gravity energy storage elements are pushed in series on the whole front and back of the gravity energy storage element moving track, and under the action of power or gravity, the solid gravity flow is similar to water flow, and can continuously move in one direction between thousands of kilometers of altitude difference in different function zones of energy storage or energy release, so that the system operation efficiency is greatly improved, and single machine large capacity and super large capacity energy storage system is easy to realize.

[0012] The power tunnel section of the gravity energy storage element moving track of the application and the non-power track section, the power tunnel section generates all the power required for the solid gravity flow on the solid gravity energy storage element moving track to rise, or bears the thrust of all the gravity of the solid gravity flow on the solid gravity energy storage element moving track to drop. The power tunnel large thrust linear motor is powered, the length of the power tunnel is shortened to the maximum, and the roadbed treatment of the power tunnel section is strengthened so that it can bear the thrust exerted by the gravity of the solid gravity energy storage element in the whole lifting channel. Since the power tunnel section bears all the thrust exerted by the gravity of the solid gravity energy storage element in the whole lifting channel, the roadbed of the non-power track section only bears part of the pressure exerted by the solid gravity energy storage element and does not bear the thrust in the direction of low altitude, thereby simplifying the roadbed treatment of the non-power track section, reducing the cost of the roadbed, and maximizing the reduction of system investment. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 is a schematic diagram of the solid gravity flow carrying equipment of the application;

[0015] Figure 2 is Figure 1 a cross-sectional schematic diagram of the solid gravity flow carrying equipment of the application;

[0016] Figure 3 is Figure 1 a schematic diagram of the gravity energy storage element of the solid gravity flow carrying equipment of the application (top);

[0017] Figure 4 is Figure 3 a cross-sectional schematic diagram of the solid gravity flow carrying equipment of the application (A-A);

[0018] Figure 5 is Figure 1 a simplified schematic diagram of the solid gravity flow carrying equipment of the application;

[0019] Figure 6 is Figure 1 a low-altitude transformer connection schematic diagram of the solid gravity flow carrying equipment of the application;

[0020] Figure 7 is Figure 1 a high-altitude transformer connection schematic diagram of the solid gravity flow carrying equipment of the application;

[0021] Figure 8FIG. 1 is a schematic view of a solid gravity flow carrying device provided by an embodiment of the present application;

[0022] Figure 9 FIG. 4 is a side view of a braking element provided by an embodiment of the present application;

[0023] Figure 10 FIG. 5 is a side view of a gravity energy storage element provided by an embodiment of the present application;

[0024] Figure 11 FIG. 6 is a schematic view of an energy storage system provided by an embodiment of the present application;

[0025] Figure 12 FIG. 7 is a schematic view of a low-altitude storage yard of the energy storage system of Figure 11 FIG. 8 is a schematic view of a high-altitude storage yard of the energy storage system of DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the accompanying drawings in the embodiments of the present application.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3The application provides a solid gravity flow carrying device 1000, which comprises a plurality of gravity energy storage elements 900, a gravity energy storage element moving track 100, a linear motor stator group and a linear motor rotor group. The gravity energy storage element moving track 100 is used to guide the lifting movement of the gravity energy storage elements 900. The gravity energy storage element moving track 100 has a low-altitude section 110 and a high-altitude section 120 opposite to the low-altitude section 110, and an inclined section 130 between the low-altitude section 110 and the high-altitude section 120. The inclined section 130 is provided with a power tunnel 131, which has a tunnel bottom 1311, a tunnel top 1312 opposite to the tunnel bottom 1311 and two tunnel sides 1313. The linear motor stator group comprises a bottom stator 210 fixed to the tunnel bottom 1311, a top stator 220 fixed to the tunnel top 1312 and a side stator 230 fixed to the tunnel side 1313. The linear motor rotor group comprises a bottom rotor 310, a top rotor 320 and a side rotor 330 fixed to each of the gravity energy storage elements 900. The bottom rotor 310, the top rotor 320 and the side rotor 330 are respectively fixed to the bottom, the top and the side of the gravity energy storage elements 900. When a plurality of gravity energy storage elements 900 are continuously pushed into the power tunnel 131 from the low-altitude section 110, the bottom rotor 310, the top rotor 320 and the side rotor 330 are respectively electromagnetically coupled with the bottom stator 210, the top stator 220 and the side stator 230 to convert electric energy into driving power to drive the plurality of gravity energy storage elements 900 to continuously push and move to the high-altitude section 120. When a plurality of gravity energy storage elements 900 are continuously pushed into the power tunnel 131 from the high-altitude section 120, the plurality of gravity energy storage elements 900 are continuously pushed through the power tunnel 131 under the action of gravity, the bottom rotor 310, the top rotor 320 and the side rotor 330 are respectively electromagnetically coupled with the bottom stator 210, the top stator 220 and the side stator 230 to convert mechanical kinetic energy into electric energy, and the plurality of gravity energy storage elements 900 continuously push and move to the low-altitude section 110 to be lifted to the power tunnel 131 of the high-altitude section 120 again next time.

[0028] The moving track 100 of the gravity energy storage element is provided with a power tunnel 131, the gravity energy storage element 900 passes through the power tunnel 131, the bottom mover 310, the top mover 320 and the side mover 330 are respectively electromagnetically coupled with the bottom stator 210, the top stator 220 and the side stator 230, a plurality of the gravity energy storage elements 900 are continuously pushed to form a solid gravity flow to be synchronously lifted to convert electric energy into power, thereby changing potential energy and storing; a plurality of the gravity energy storage elements 900 are continuously pushed to form a solid gravity flow to be descended to convert gravity potential energy into electric energy and feedback to the power grid.

[0029] In the embodiment, the moving track 100 of the gravity energy storage element includes two parallel rails 101. The two parallel rails 101 are respectively rolling matched with the track wheels of the gravity energy storage element 900 to move and guide the gravity energy storage element 900. The rails 101 are fixed on a mountain with a large altitude difference. The low-altitude section 110 is located at a low-altitude position of the mountain, the high-altitude section 120 is located at a high-altitude position of the mountain, and the inclined section 130 is located on a slope of the mountain. The altitude difference between the high-altitude section 120 and the low-altitude section 110 is 800m-3000m or above 3000m. For example, the altitude of the low-altitude section 110 is 1200m, and the altitude of the high-altitude section 120 is 4200m. The slope of the inclined section 130 is preferably in the range of 20° to 60°, for example, the slope of the inclined section 130 is 30°. For example, the length of the inclined section 130 is 6000m.

[0030] In this embodiment, the power tunnel 131 passes through the mountain to facilitate smooth movement of the gravity energy storage element 900. The rails 101 of the inclined section 130 pass through the power tunnel 131, which can guide the movement of the gravity energy storage element 900. The power tunnel 131 is provided with an inner wall, the bottom stator 210 is fixed between the two rails 101 inside the tunnel, that is, the part between the two rails 101 inside the tunnel constitutes the tunnel bottom 1311. The top stator 220 is fixed to the top of the inner wall of the tunnel, that is, the top of the inner wall of the tunnel constitutes the tunnel top 1312. The side stator 230 is fixed to the side of the inner wall of the tunnel, and the inner wall of the tunnel has two opposite sides, that is, the power tunnel 131 is provided with two opposite tunnel sides 1313, and the two side stators 230 are respectively fixed to the two tunnel sides 1313. The power tunnel 131 corresponds to a part of the inclined section 130, that is, the length of the power tunnel 131 is much shorter than the length of the inclined section 130. The length of the power tunnel 131 is a part of the length of the inclined section 130, for example, the total length of the inclined section 130 is 6000m, the length of the power tunnel 131 is 1000m-3000m, and the length of the power tunnel 131 is determined according to the technical level of the large thrust linear motor, and the design goal is to make the power tunnel 131 as short as possible, but it is limited by the technical level of the linear motor used in each stage. The part of the inclined section 130 outside the power tunnel 131 constitutes a non-power track section, which occupies a larger area of the inclined section 130.

[0031] The length of the power tunnel 131 is much smaller than the length of the inclined section 130, which corresponds to the connection between the low-altitude section 110 and the inclined section 130, so as to utilize the coupling of the linear motor mover and the linear motor stator to drive the energy storage element to rise on the mountain slope, realize the conversion of electric energy into potential energy of the solid gravity energy storage element 900, and facilitate the gravity energy storage element 900 to drive the cooperation of the power tunnel 131 to slide down, so as to convert the gravitational potential energy into electric energy.

[0032] It can be understood that when the bottom stator 210, the top stator 220 and the side stator 230 in the power tunnel 131 are matched with the bottom mover 310, the top mover 320 and the side mover 330 of the gravitational energy storage element 900 respectively, the linear motor driven gravitational energy storage element 900 is realized to rise from the low altitude section 110 to the high altitude section 120, so that the linear motor consumes electric energy to work, and the gravitational energy storage element 900 rises to the high altitude section 120, thereby storing the gravitational potential energy. When the gravitational energy storage element 900 descends from the high altitude to the low altitude section 110, the bottom mover 310, the top mover 320 and the side mover 330 are driven to descend under the gravity, and the bottom mover 310, the top mover 320 and the side mover 330 are matched with the bottom stator 210, the top stator 220 and the side stator 230 in the power tunnel 131 respectively, thereby realizing electromagnetic excitation to convert the gravitational potential energy into electric energy.

[0033] Please refer to Figure 2 , Figure 3 and Figure 4 In the embodiment, the bottom stator 210, the top stator 220 and the side stator 230 are all stators of high thrust density and large thrust linear motors. The bottom stator 210 is installed between the two rails 101 along the length direction of the power tunnel 131, and the top stator 220 and the side stator 230 are both installed on the inner wall of the tunnel along the length direction of the power tunnel 131 and in the power tunnel 131.

[0034] In the embodiment, a plurality of gravitational energy storage elements 900 can be arranged continuously in the power tunnel 131, that is, during the energy storage or release process, the length of the mover of the plurality of gravitational energy storage elements 900 is approximately equal to the length of the stator in the power tunnel 131, so that the length of the mover is coupled with the full length of the stator in the power tunnel 131, so that the full length of the long linear motor stator is in a load state, so as to obtain high power factor and high efficiency of the linear motor operation. There are always a plurality of continuously moving gravitational energy storage elements 900 on the power tunnel 131, so that the gravitational energy storage elements 900 continuously move along the gravitational energy storage element moving track 100, thereby forming a solid gravity flow.

[0035] It can be understood that the solid gravity flow carrying device 1000 provided in the application can be applied to a large altitude difference solid gravity energy storage system, and has the following beneficial effects:

[0036] 1. Make full use of natural conditions to make large altitude difference terrain become a gravitational energy storage resource

[0037] 1.1 Due to the action of the earth's gravity, the gravity energy storage element 900 naturally has potential energy. The greater the relative value of the high and low altitudes of the gravity energy storage element 900, the greater the absolute value of its potential energy; the potential energy exists at a certain height when the gravity energy storage element 900 stays at that height, that is, energy storage is achieved.

[0038] Since solid is the most basic material in nature, sand, soil, and stone are all basic materials of the earth, which are very abundant, easy to obtain, and easy to process into engineering shapes. The shape does not change over time, and the mass does not disappear over time; it is cheap to use solid materials as gravity energy storage elements 900.

[0039] 1.2 The potential energy density of the gravity energy storage element 900 depends on the absolute value of the height difference of the location where the gravity energy storage element 900 is located, that is, the altitude difference determines the potential energy density of the gravity energy storage element 900. That is, choosing a large altitude difference is the preferred condition for improving the potential energy storage density of the gravity energy storage element 900.

[0040] Since plateaus and mountains are the basic form of the earth, they exist to varying degrees and universally on all continents in the world; the geographical resources of plateaus and mountains in Asia are particularly rich, (the Qinghai-Tibet Plateau and the Pamir Plateau have a marginal length of 6000-7000 kilometers, and the altitude difference between the plateau edge and the plain or basin can reach 2000-3000 meters, with excellent topographic conditions, which is very conducive to the construction of large-altitude solid gravity energy storage power stations and the selection of sites. The amount of geographical resources available for selection is very rich (according to the maximum requirement, the actual engineering demand is less than 500 kilometers), which is sufficient to support the energy transformation required by super-large-scale energy storage.)(The average altitude difference between the Qinghai-Tibet Plateau, the Pamir Plateau, and the surrounding plains and basins can reach more than 3000 meters, so the resources for solid gravity energy storage are extremely rich.)

[0041] 2. Innovative engineering technology means

[0042] The invention subversively creates a method of forming a solid gravity flow, solidifying the solid gravity flow, so that the solid gravity flow is similar to a liquid flow (water flow), under the action of power or gravity, continuously flowing (moving) without interval between high altitude and low altitude, controlling the flow direction to convert power into power, making the solid gravity rise to a high place, changing the potential energy of gravity, realizing energy storage; or lowering the solid gravity to a low place, converting the solid gravity into electric energy, and releasing energy to the power grid. The principle is similar to the pumped storage power station based on liquid gravity flow. However, the solid gravity storage based on solid gravity flow utilizes the rich geographical resources of plateau, mountain and surrounding edge with sufficient resource guarantee; the terrain has large altitude difference, and the solid material has large mass density and stable properties, which can provide almost unlimited quantity, so that the solid gravity storage can be applied to super large scale energy storage, can meet the energy storage scale requirement of energy transformation, and can provide key energy storage technology support for energy transformation revolution.

[0043] 1. The solid gravity storage element 900 with a pushing boss in front and back, left and right sides with side movers 330, top with top mover 320, bottom with bottom mover 310 and rolling wheels, so that the gravity storage element 900 can move continuously, and the gravity storage element 900 can bear the linear motor thrust in all directions in the power tunnel 131, increasing the driving efficiency;

[0044] 2. Selecting terrain with large altitude difference, and building lifting channels for solid gravity storage elements 900 between high and low altitudes;

[0045] 3. The solid gravity storage elements 900 are connected in series in front and back on the lifting channel, and are pushed and linked under the action of power or gravity, so that the solid gravity storage elements 900 are fluidized to form a solid gravity flow;

[0046] 4. The power tunnel 131 (called power tunnel) powered by linear motor is arranged at the low altitude section 110 of the solid gravity storage element 900 lifting channel, which absorbs the power of the power grid to apply upward power to the solid gravity storage element 900, or converts the gravity of the solid gravity storage element 900 into electric power and feeds back to the power grid;

[0047] 5. The row car array is arranged at the high and low altitude stacking sites, which is used for collecting or dispersing the solid gravity storage elements 900 from the track to each stacking site or from each stacking site to the track;

[0048] 6. Under the control of the system control unit, the speed of collecting and dispersing the solid gravity storage elements 900 at the high and low altitude stacking sites is coordinated and synchronized with the flow rate of the solid gravity flow, so that the solid gravity flow keeps one-way continuous motion in the function time zone of energy storage or energy release, so that the system obtains the highest operation efficiency.

[0049] The high altitude, high mountains and the surrounding plains, basins between the elevation difference, to achieve gravity storage element 900 in high altitude and low altitude between the movement and stay, so that the change and storage of potential energy, in order to achieve the purpose of energy storage. Therefore, suitable for large altitude difference between the unit time to make a large number of gravity storage element 900 to achieve the transfer of engineering technology is the key to the innovation of the application.

[0050] The application divides the solid gravity storage element 900 lifting channel into a power tunnel section and a non-power track section. The power tunnel section is a power tunnel 131, which generates all the power required for the solid gravity flow to rise in the solid gravity storage element 900 lifting channel, or bears all the thrust of the solid gravity flow to descend in the solid gravity storage element 900 lifting channel. The power tunnel section is powered by a large-thrust linear motor, which maximizes the length of the power tunnel main power section (shortens the length of the large-thrust linear motor) and strengthens the roadbed treatment of the power tunnel, so that it can bear the thrust exerted by the gravity of the solid gravity storage element 900 in the whole lifting channel. Since the power tunnel section bears the thrust exerted by the gravity of the solid gravity storage element 900 in the whole lifting channel, the gravity of the solid gravity storage element 900 in the non-power track section only exerts partial pressure on the roadbed, without exerting thrust in the low altitude direction; thereby greatly simplifying the roadbed treatment of the non-power track section, reducing its cost, and maximizing the reduction of system investment. It can be predicted that the length of the power tunnel (power tunnel 131) is only a section of the length of the solid gravity storage element 900 lifting channel, and although the investment density is also concentrated on this section, the concentration degree is not proportional, which can save a large amount of investment compared with the full-power structure.

[0051] Further, please continue to refer to Figure 2 、 Figure 3 and Figure 4 , the tunnel side 1313 is provided with a first limiting rail 1314 and a second limiting rail 1315, the first limiting rail 1314 and the second limiting rail 1315 extend along the length direction of the power tunnel 131, the first limiting rail 1314 and the second limiting rail 1315 are respectively close to the tunnel top 1312 and the tunnel bottom 1311, the side of the gravity storage element 900 is provided with a first side limiting wheel 901 and a second side limiting wheel 902, after the gravity storage element 900 enters the power tunnel 131, the first side limiting wheel 901 and the second side limiting wheel 902 are respectively limited with the end face of the first limiting rail 1314 and the end face of the second limiting rail 1315.

[0052] In the embodiment, the first limiting rail 1314 and the second limiting rail 1315 are protruded from the inner wall of the tunnel. The side stator 230 is arranged between the first limiting rail 1314 and the second limiting rail 1315 on the same side. The first limiting rail 1314 and the second limiting rail 1315 are both limiting rails. The first limiting rail 1314 has a first limiting end surface away from the inner wall of the tunnel, and the second limiting rail 1315 has a second limiting end surface away from the inner wall of the tunnel. The first limiting end surface is in rolling contact with the first side limiting wheel 901, and the second limiting end surface is in rolling contact with the second side limiting wheel 902, so as to limit the gap between the side stator 230 and the side mover 330 within a certain range, to ensure the stable electromagnetic coupling between the side stator 230 and the side mover 330, and further ensure the driving efficiency.

[0053] In the embodiment, the first side limiting wheel 901 and the second side limiting wheel 902 are at least partially protruded from the side of the gravity energy storage element 900. The rotation axis of the first side limiting wheel 901 is parallel to the first limiting end surface, and the rotation axis of the second side limiting wheel 902 is parallel to the second limiting end surface. The outer circumferential surface of the first side limiting wheel 901 is in contact with the first limiting end surface, and the outer circumferential surface of the second side limiting wheel 902 is in contact with the second limiting end surface. The side mover 330 is located between the first side limiting wheel 901 and the second side limiting wheel 902 on the same side.

[0054] Specifically, the gravity energy storage element 900 is provided with a box body 903, and the box body 903 has a filling cavity filled with solid materials. The track wheels are arranged at the bottom of the box body 903. The bottom mover 310 is arranged at the bottom of the box body 903 and located between the two rows of track wheels 904. The box body 903 is provided with two opposite stacking bosses 909 at the top, and a fixing groove is formed between the two stacking bosses 909, and the top mover 320 is located in the fixing groove. The two stacking bosses 909 are adjacent to the opposite two side walls of the box body 903, respectively. The first side limiting wheel 901 is arranged on the stacking boss 909 and partially protrudes from the side wall of the box body 903. The second side limiting wheel 902 is arranged on the side wall of the box body 903 and adjacent to the bottom of the box body 903. The side mover 330 is fixed to the side wall of the box body 903 and located between the first side limiting wheel 901 and the second side limiting wheel 902 on the same side.

[0055] Further, referring to Figure 5 , a low-altitude arc-shaped section 140 is arranged between the inclined section 130 and the low-altitude section 110, and a high-altitude arc-shaped section 150 is arranged between the inclined section 130 and the high-altitude section 120.

[0056] In this embodiment, the low-altitude arc segment 140 connects the inclined segment 130 and the low-altitude segment 110, so that the gravity energy storage elements 900 can smoothly enter the inclined segment 130 from the low-altitude segment 110. The high-altitude arc segment 150 connects the inclined segment 130 and the high-altitude segment 120, so that the gravity energy storage elements 900 can smoothly enter the inclined segment 130 from the high-altitude segment 120. The power tunnel 131 is arranged at the part of the inclined segment 130 close to the low-altitude segment 110, so that the plurality of gravity energy storage elements 900 can quickly enter the power tunnel 131 after entering the inclined segment 130 from the low-altitude arc segment 140, and obtain the power for being pushed up through the power tunnel 131, thereby enabling the plurality of gravity energy storage elements 900 to be continuously pushed up to the high-altitude segment 120 after passing through the power tunnel 131, and realizing energy storage.

[0057] It can be understood that obtaining high energy storage and conversion efficiency is a key indicator of energy storage, which is related to the economy of energy storage. The solid gravity flow device provided in the present application uses a linear motor as the power device of the lifting and carrying channel of the solid gravity energy storage element 900, and improving the energy conversion efficiency is an important feature of the present application.

[0058] Linear motors have been applied in the field of rail transit, and have shown the comprehensive performance advantages of linear motors. However, the energy conversion efficiency of linear motors is lower than that of rotary motors, and this is a disadvantage that must be overcome for energy storage applications.

[0059] The full-area coupling between the inner diameter of the stator of the rotary motor and the outer diameter of the rotor, the tangential thrust generated by the traveling wave magnetic field of the stator is fully effective on the rotor; the air gap between the stator and the rotor is small, the air gap reluctance loss is small, and the efficiency is high.

[0060] However, in existing linear motor applications such as magnetic levitation trains and electromagnetic catapults, the stator and the mover of the linear motor are coupled, and the length of the electromagnetic thrust generated is only a small part of the local part of the stator energization length, and the remaining part of the stator energization length is in the state of no-load energization, resulting in low power factor and low efficiency.

[0061] Please refer to Figure 1 and Figure 2The bottom stator 210 of the power tunnel 131 of the solid gravity flow carrying device 1000 provided by the application is full-length and full-range coupled with the length of the bottom mover 310 of the plurality of gravity energy storage elements 900, and keeps the moving out and moving in of the bottom mover 310 in real-time balance, so that the coupling degree is constant. The top stator 220 is full-length and full-range coupled with the length of the top mover 320 of the plurality of gravity energy storage elements 900, and keeps the moving out and moving in of the top mover 320 in real-time balance, so that the coupling degree is constant. The side stator 230 is full-length and full-range coupled with the length of the side mover 330 of the plurality of gravity energy storage elements 900, and keeps the moving out and moving in of the side mover 330 in real-time balance, so that the coupling degree is constant. The full-length cross section between the stator and the mover in the power tunnel 131 generates effective thrust, thereby greatly improving the energy conversion efficiency of the linear motor as an energy storage application.

[0062] The power tunnel 131 is installed with the stator by the tunnel inner wall and the rail 101, the stator has high stability and strength, the bottom mover 310, the top mover 320 and the side mover 330 are limited by the first side limiting wheel 901, the second side limiting wheel 902 and the first limiting rail 1314, the second limiting rail 1315 respectively, so that the air gap between the bottom mover 310, the top mover 320 and the side mover 330 and the bottom stator 210, the top stator 220 and the side stator 230 is small in design value, and the efficiency is further improved.

[0063] The power tunnel 131 is the power core of the system, when the system stores energy, the power tunnel 131 converts the power of the power grid into the power for driving the gravity energy storage elements 900 to ascend along the gravity energy storage element moving track 100; when the system releases energy, the power tunnel 131 converts the mechanical thrust of the plurality of gravity energy storage elements 900 forming the solid gravity flow on the gravity energy storage element moving track 100 into the power fed back to the power grid.

[0064] The power tunnel 131 is the most important part of the system, improving the thrust density of the main power section, shortening the length of the power tunnel 131, reducing the underground foundation engineering cost of the gravity energy storage element moving track 100, reducing the cost of the power tunnel 131, and reducing the operation and maintenance cost, and other practical and potential advantages, the solid gravity flow carrying device 1000 of the application is used to improve the thrust density per unit length of the power tunnel 131, to shorten the length of the power tunnel 131, and the following ways are used to achieve the above-mentioned purposes:

[0065] 1. The linear motor stator is installed on the tunnel inner wall and the bottom, the top and the double side of the tunnel, and the linear motor mover composed of the induction plate is installed on the bottom, the top and the double side of the solid gravity energy storage element, thereby increasing the electromagnetic coupling area per unit length of the power tunnel and improving the tangential thrust per unit length.

[0066] As a specific embodiment, the low altitude section 110 has an altitude of 1200 m, the high altitude section 120 has an altitude of 4200 m, the difference in altitude between the low altitude section 110 and the high altitude section 120 is 3000 m, the slope of the inclined section 130 is 30°, and the slope length of the inclined section 130 is 6000 m.

[0067] The cross section of the gravity energy storage element 900 is set according to road transportation, for example, the width of the gravity energy storage element 900 is 3.2 m, the height of the gravity energy storage element 900 is 3.2 m, the cross-sectional area of the gravity energy storage element 900 is 10.24 m2, and the cross section of the gravity energy storage element 900 is 10 m2.

[0068] The gravity energy storage element 900 includes a box 903, which is a steel box shell, the inside of the box 903 is filled with waste stones and sand, the average mass density of the box 903 and the internal filling is 2500 kg / m3, and the unit length weight is 25000 kg / m.

[0069] The total weight G2.5 of the slope of the inclined section 130 is 25000 (kg) x 6000 (m) = 150000000 kg, and the total thrust F2.5 of the solid gravity flow formed by the multiple gravity energy storage elements 900 of the inclined section 130 is 150000000 (kg) x 9.8 x sin30 = 735 (MN).

[0070] The tangential thrust per unit area of the coupling surface of the bottom stator 210 and the bottom mover 310, the top stator 220 and the top mover 320, and the side stator 230 and the side mover 330 is 0.05 MN / m2, the total side length of the four sides of the gravity energy storage element 900 is 7.2 m, and the tangential thrust per unit length of the power tunnel is 0.36 MN.

[0071] The length L of the power tunnel 131 is 735 (MN) ÷ 0.36 MN = 2041.67 m.

[0072] Considering the acceleration thrust margin multiplied by a factor of 1.2, the length L of the power tunnel section 131 is 2500 m, and the length of the power tunnel is about 40% of the total length 6000 m of the gravity energy storage element moving track 100.

[0073] Suppose the flow velocity V4 of the solid gravity flow formed by multiple energy storage elements is 4 (m / s).

[0074] The total power P4 of the linear motor composed of the bottom stator 210 and the bottom mover 310, the side stator 230 and the side mover 330, and the top stator 220 and the top mover 320 required is 735 (MN) x 4 (m / s) = 2940000 (kw).

[0075] That is, the unit can store 2.94 million kWh of energy per hour (theoretically), and 470400 million kWh of energy per year (1600 hours).

[0076] Further, please refer to Figure 1 , Figure 2 and Figure 4 , the gravity energy storage element moving track 100 is provided with two parallel rails 101, the bottom of the gravity energy storage element 900 is provided with two rows of track wheels 904, and the two rows of track wheels 904 are matched with the two rails 101 respectively, and the bottom mover 310 is located between the two rows of track wheels 904. When the gravity energy storage element 900 passes through the power tunnel 131, the bottom mover 310 is electromagnetically coupled with the bottom stator 210 to drive the gravity energy storage element 900 to move along the two rows of rails 101.

[0077] Further, please refer to Figure 5 , Figure 6 and Figure 7 , the low-altitude section 110 has a low-altitude collecting and distributing section 111, a low-altitude buffer conveying section 112 and a low-altitude receiving and sending section 113 connected in sequence, the low-altitude collecting and distributing section 111 is used for collecting and distributing the gravity energy storage element 900, the low-altitude buffer conveying section 112 transfers the gravity energy storage element 900 between the low-altitude collecting and distributing section 111 and the low-altitude receiving and sending section 113, and the low-altitude receiving and sending section 113 is used to push the gravity energy storage element 900 to the inclined section 130 during energy storage.

[0078] In this embodiment, the low-altitude collecting and distributing section 111 is used to arrange the gravity energy storage element 900 conveyed to the low-altitude section 110 on the track for stacking and storing, or to arrange the stacked and stored gravity energy storage element 900 on the track. The low-altitude buffer conveying section 112 conveys the gravity energy storage element 900 arranged by the low-altitude collecting and distributing section 111 to the low-altitude receiving and sending section 113, or conveys the gravity energy storage element 900 of the low-altitude receiving and sending section 113 to the low-altitude collecting and distributing section 111 for arrangement. The low-altitude receiving and sending section 113 receives the gravity energy storage element 900 descending from the low-altitude arc-shaped section 140 and conveys it to the low-altitude buffer conveying section 112, or pushes the gravity energy storage element 900 conveyed by the low-altitude buffer conveying section 112 to the low-altitude arc-shaped section 140.

[0079] Further, the linear motor stator group comprises low altitude motor stators 290 fixed on the low altitude collecting and distributing section 111, the low altitude buffer conveying section 112 and the low altitude receiving and sending section 113, the low altitude motor stators 290 are electromagnetically coupled with the bottom mover 310 to drive the gravity energy storage element 900 to move in the low altitude collecting and distributing section 111, the low altitude buffer conveying section 112 and the low altitude receiving and sending section 113.

[0080] In the embodiment, the low altitude motor stators 290 are fixed between the two rows of rails 101 to facilitate the electromagnetic coupling between the low altitude motor stators 290 and the bottom mover 310 fixed on the bottom of the gravity energy storage element 900. The low altitude motor stators 290 of the low altitude collecting and distributing section 111 are respectively electrically connected with different current converters in the low altitude collecting and distributing section 111, the low altitude buffer conveying section 112 and the low altitude receiving and sending section 113. Specifically, the low altitude motor stators 290 of the low altitude collecting and distributing section 111 are electrically connected with N+1 collecting and distributing section different current converters 2902, the low altitude motor stators 290 of the low altitude buffer conveying section 112 are electrically connected with buffer section current converters 2903, and the low altitude motor stators 290 of the low altitude receiving and sending section 113 are electrically connected with receiving and sending section current converters 2904, so that the gravity energy storage element 900 has different moving speeds in the low altitude collecting and distributing section 111, the low altitude buffer conveying section 112 and the low altitude receiving and sending section 113, facilitating the conveying of the gravity energy storage element 900 in the low altitude section 110.

[0081] Further, the high altitude section 120 has a high altitude collecting and distributing section 121, a high altitude buffer conveying section 122 and a high altitude receiving and sending section 123 connected in sequence, the high altitude collecting and distributing section 121 is used for collecting and distributing transportation of the gravity energy storage element 900, the high altitude buffer conveying section 122 is used for transferring and conveying the gravity energy storage element 900 between the high altitude collecting and distributing section 121 and the high altitude receiving and sending section 123, and the high altitude receiving and sending section 123 is used for pushing the gravity energy storage element 900 to the inclined section 130 when releasing energy.

[0082] In this embodiment, the high-altitude distributing section 121 is used to distribute the gravity storage elements 900 transported to the high-altitude section 120 on the track for stacking or to distribute the stacked gravity storage elements 900 on the track. The high-altitude buffer transport section 122 is used to transport the gravity storage elements 900 distributed by the high-altitude distributing section 121 to the high-altitude receiving section 123 or to transport the gravity storage elements 900 from the high-altitude receiving section 123 to the high-altitude distributing section 121. The high-altitude receiving section 123 is used to receive the gravity storage elements 900 from the high-altitude arc section 150 and transport them to the high-altitude buffer transport section 122 or to push the gravity storage elements 900 transported by the high-altitude buffer transport section 122 to the high-altitude arc section 150.

[0083] Further, the linear motor stator group includes high-altitude motor stators 280 fixed to the high-altitude distributing section 121, the high-altitude buffer transport section 122 and the high-altitude receiving section 123. The high-altitude motor stators 280 are coupled to the bottom movers 310 to drive the gravity storage elements 900 to move in the high-altitude distributing section 121, the high-altitude buffer transport section 122 and the high-altitude receiving section 123.

[0084] In this embodiment, the high-altitude motor stators 280 are fixed between the two rows of rails 101 to facilitate the electromagnetic coupling between the high-altitude motor stators 280 and the bottom movers 310 fixed to the bottom of the gravity storage elements 900. The high-altitude motor stators 280 of the high-altitude distributing section 121 are respectively connected to different converters in the high-altitude distributing section 121, the high-altitude buffer transport section 122 and the high-altitude receiving section 123. Specifically, the high-altitude motor stators 280 of the high-altitude distributing section 121 are connected to N+1 distributing section different converters 2802, the high-altitude motor stators 280 of the high-altitude buffer transport section 122 are connected to a buffer section converter 2803, and the high-altitude motor stators 280 of the high-altitude receiving section 123 are connected to a receiving section converter 2804, so that the gravity storage elements 900 have different moving speeds in the high-altitude distributing section 121, the high-altitude buffer transport section 122 and the high-altitude receiving section 123, facilitating the transportation of the gravity storage elements 900 in the high-altitude section 120.

[0085] Further, the solid gravity flow carrier 1000 also includes a low-altitude braking section 160 connected to the end of the low-altitude section 110 away from the power tunnel 131 to brake the gravity storage elements 900 entering the low-altitude section 110.

[0086] In this embodiment, the low-altitude braking section 160 brakes the gravity energy storage element 900 to complete the conversion of gravitational potential energy into electrical energy, so that the gravity energy storage element 900 is safely stopped, avoiding the inertial kinetic energy of the gravity energy storage element 900 causing impact damage to other objects. The low-altitude braking section 160 brakes the gravity energy storage element 900 in front, so that the gravity energy storage element 900 forms a solid gravity flow, facilitating the stacking and placement of multiple gravity energy storage elements 900 at low altitudes.

[0087] Specifically, please refer to Figure 8 and Figure 9 The low-altitude braking section 160 is provided with a braking tunnel 180 and a plurality of brake elements 181 arranged in the braking tunnel 180. The plurality of brake elements 181 are sequentially and continuously abutted in the braking tunnel 180. The outer side of the brake element 181 is provided with at least one pair of brake pads 182. The braking tunnel 180 is provided with a brake rail 183 cooperating with the at least one pair of brake pads 182. When the gravity energy storage element 900 abuts against the brake element 181, and the at least one pair of brake pads 182 clamps the brake rail 183, the brake element 181 brakes the gravity energy storage element 900.

[0088] In this embodiment, the braking tunnel 180 at low altitudes is connected to the low-altitude distribution section 111. The plurality of brake elements 181 are movably arranged in the braking tunnel 180 to absorb the kinetic energy of the gravity energy storage element 900. Specifically, the brake element 181 is provided with a plurality of pairs of brake pads 182 on the left and right side walls. The plurality of pairs of brake pads 182 are arranged along two vertical lines on the side walls of the brake element 181. The brake rail 183 is arranged along two vertical lines on the inner side walls of the braking tunnel 180. The brake rail 183 arranged along the upper vertical line cooperates with the plurality of pairs of brake pads 182 arranged along the upper vertical line. The brake rail 183 arranged along the lower vertical line cooperates with the plurality of pairs of brake pads 182 arranged along the lower vertical line. Each pair of brake pads 182 includes two brake pads that open and close relative to each other. When the two brake pads close to clamp the brake rail 183, the friction between the brake pads 182 and the brake rail 183 prevents the brake element 181 from moving. The plurality of brake elements 181 abut against each other to increase the length of the brake elements 181 cooperating with the brake rail 183, thereby increasing the braking force to effectively brake the plurality of gravity energy storage elements 900 forming a solid gravity flow.

[0089] In this embodiment, the linear motor stator group further comprises a track motor stator 270 fixed between the two brake section rails 185, the bottom of the brake element 181 is provided with two rows of brake element track wheels 184 matched with the two brake section rails 185, the linear motor rotor group further comprises a reset motor rotor 370 fixed to the bottom of the brake element 181 and located between the two rows of brake element track wheels 184, the reset motor rotor 370 is coupled with the track motor stator 270 to drive the brake element 181 to move along the brake section rail 185 to reset. When the two brake pads are opened and separated from the brake rail 183, the reset motor rotor 370 is coupled with the reset motor stator to drive the brake element 181 to move in the brake tunnel, so that the brake element 181 can be reset to facilitate the brake of the gravity energy storage element 900 next time.

[0090] Further, the outer side of the brake element 181 is provided with a brake support 186, and the brake support 186 is provided with at least one driving element 1861, and each driving element 1861 corresponds to drive the brake pad 182 to clamp the brake rail 183.

[0091] In this embodiment, the brake element 181 is provided with two rows of brake supports 186 arranged on the left and right side walls. The upper brake support 186 is close to the top of the brake element 181, and the lower brake support 186 is close to the bottom of the brake element 181. The upper brake support 186 is movably connected with the upper row of linearly arranged brake pads 182, and the lower brake support 186 is movably connected with the lower row of linearly arranged brake pads 182. The driving element 1861 applies an opening or closing driving force to the brake pad 182. The upper row of brake pads 182 and the lower row of brake pads 182 are staggered to balance the brake resistance of the brake element 181, so that the brake element can effectively brake the multiple gravity energy storage elements 900 forming a solid gravity flow. The brake element 181 is provided with two brake supports 186 on opposite sides, and the two brake supports 186 are close to the top and bottom of the brake element 181 respectively, and each brake support 186 is provided with multiple driving elements and multiple brake pads 182.

[0092] Further, please refer to Figure 10The gravity energy storage element 900 is provided with a pushing boss 905 and a pushing recess 906 at the front and back ends respectively. The pushing boss 905 at the front end of the gravity energy storage element 900 and the pushing recess 906 at the back end of the previous gravity energy storage element 900 abut against each other. The pushing recess 906 at the back end of the gravity energy storage element 900 and the pushing boss 905 at the front end of the next gravity energy storage element 900 abut against each other. The gravity energy storage elements 900 from the low-altitude section 110 to the high-altitude end abut against each other in series and are linked together under the action of power or gravity to form a solid gravity flow.

[0093] In the embodiment, the gravity energy storage element 900 includes a box 903 and four track wheels 904 rotatably connected to the bottom of the box 903 (the track wheels 904 can be multiple pairs or groups). The box 903 is used to contain solid gravity objects. The side movers 330 are fixed to the left and right sides of the box 903. The pushing boss 905 and the pushing recess 906 are arranged at the front and back of the box 903 respectively. The rollers are arranged at the bottom of the box 903, and the top movers 320 are arranged at the top of the box 903. The box 903 is a rectangular shell. The box 903 is filled with solid gravity objects, which can be the most basic resources in nature, such as sand, soil, and stones. The four track wheels 904 are respectively and rotatably connected to the two rails 101 of the gravity energy storage element moving track 100 to enable the gravity energy storage element 900 to form a solid gravity flow. The gravity energy storage element 900 can be transferred and stored. The box 903 and the track wheels 904 are made of steel, which makes the gravity energy storage element 900 stable, durable, low in manufacturing cost, and high in mass density.

[0094] In the embodiment, the pushing boss 905 and the pushing recess 906 are respectively fixed to the front and back ends of the box 903. The end of the pushing boss 905 away from the box 903 is provided with an arc-shaped protrusion, and the end of the pushing recess 906 is provided with an arc-shaped recess. When the pushing boss 905 and the pushing recess 906 of two adjacent gravity energy storage elements 900 abut against each other, the arc-shaped protrusion and the arc-shaped recess are matched to facilitate the effective connection of the two adjacent gravity energy storage elements 900, thereby effectively forming a solid gravity flow. After the solid gravity flow completes the storage or release of gravitational potential energy, the multiple gravity energy storage elements 900 are quickly separated through the arc-shaped protrusion and the arc-shaped recess, thereby realizing the quick separation of the gravity energy storage elements 900 and facilitating the quick transfer and storage of the gravity energy storage elements 900. Of course, in other embodiments, the end of the pushing boss 905 can be provided with an arc-shaped recess, and the end of the pushing recess 906 can be provided with an arc-shaped protrusion.

[0095] Further, the top of the box 903 is provided with wheel vacancy area, which is used to accommodate a part of the track wheel 904 when the gravity energy storage elements 900 are stacked.

[0096] In this embodiment, the top of the box 903 is provided with four wheel vacancy areas, the depth of the wheel vacancy area is slightly larger than the height of the track wheel 904 extending out of the box 903. When the gravity energy storage elements 900 are stacked, the part of the track wheel 904 of one gravity energy storage element 900 protruding out of the box 903 is just accommodated in the wheel vacancy area of another gravity energy storage element 900, and the bottom of the upper gravity energy storage element 900 abuts against the top of the lower gravity energy storage element, so that the stacked gravity energy storage elements 900 are stable. The wheel vacancy area is provided in the stacking boss, so as to facilitate the effective stacking of the gravity energy storage elements 900.

[0097] Further, please refer to Figure 11 and Figure 12 , the embodiment of the present application also provides a solid gravity flow carrying device 1000, the energy storage system 2000 further comprises a low-altitude stacking yard 2100 and a high-altitude stacking yard 2200, the low-altitude section 110 penetrates through the low-altitude stacking yard 2100, and the high-altitude section 120 penetrates through the high-altitude stacking yard 2200, when the energy storage system 2000 stores energy, the low-altitude stacking yard 2100 delivers the gravity energy storage elements 900 to the low-altitude section 110, and the high-altitude stacking yard 2200 receives and stores the gravity energy storage elements 900 from the high-altitude section 120, when the solid gravity energy storage system 2000 releases energy, the high-altitude stacking yard 2200 delivers the gravity energy storage elements 900 to the high-altitude section 120, and the low-altitude stacking yard 2100 receives and stores the gravity energy storage elements 900 from the low-altitude section 110.

[0098] In this embodiment, the plurality of gravitational energy storage elements 900 on the full-length lifting track are in rolling engagement with the gravitational energy storage element moving track 100, that is, the plurality of gravitational energy storage elements 900 can be continuously lifted by the electromagnetic thrust generated by the bottom stator 210, the top stator 220 and the side stator 230 in the power tunnel 131 respectively cooperating with the bottom mover 310, the top mover 320 and the side mover 330 of the gravitational energy storage element 900, and the plurality of gravitational energy storage elements 900 can also be continuously lowered by the gravitational force. When the gravitational energy storage element 900 enters the power tunnel 131 of the inclined section 130, the gravitational energy storage element 900 is continuously pushed, or the gravitational energy storage element 900 is continuously lowered in linkage. The plurality of gravitational energy storage elements 900 are continuously arranged in the inclined section 130 to move, so that the plurality of gravitational energy storage elements 900 form a solid gravity flow on the inclined section 130. When the solid gravity flow flows upward along the inclined section 130, the excess electrical energy of the power grid is converted into gravitational potential energy of the plurality of gravitational energy storage elements 900, and the gravitational potential energy of the plurality of gravitational energy storage elements 900 is stored. When the solid gravity flow flows downward along the inclined section 130, the gravitational potential energy of the plurality of gravitational energy storage elements 900 is converted into electrical energy and fed back to the power grid.

[0099] In this embodiment, the low-altitude storage yard 2100 is used to store the gravitational energy storage elements 900 that descend to a low altitude when the system releases energy, and the gravitational energy storage elements 900 in the low-altitude storage yard 2100 are lifted to a high altitude when the system stores energy next time. The high-altitude storage yard 2200 is used to store the gravitational energy storage elements 900 that ascend to a high altitude when the system stores energy, and the gravitational energy storage elements 900 in the high-altitude storage yard 2200 descend to a low altitude when the system releases energy next time.

[0100] Further, the low-altitude storage yard 2100 is provided with a low-altitude stacking area that is in connection with the low-altitude section 110, and the low-altitude stacking area is used to store the gravitational energy storage elements 900 when the system releases energy. The high-altitude storage yard 2200 is provided with a high-altitude stacking area that is in connection with the high-altitude section 120, and the high-altitude stacking area is used to store the gravitational energy storage elements 900 when the system stores energy.

[0101] In this embodiment, the low-altitude stacking area receives the gravity storage elements 900 from the low-altitude distribution section 111 and stacks the gravity storage elements 900 in multiple rows and columns to save floor space. When the energy storage system 2000 needs to release the gravitational potential energy and feed back the electrical energy to the power grid, the gravity storage elements 900 at the high altitude flow to the low altitude in the form of solid gravity flow through the gravity storage element moving track 100 to the low-altitude distribution section 111 and are transferred and stacked in the low-altitude distribution section 111 to the low-altitude stacking area. When the energy storage system 2000 needs to convert the electrical energy from the power grid into gravitational potential energy for storage, the gravity storage elements 900 stacked in the low-altitude stacking area are transferred to the low-altitude distribution section 111 and continuously flow to the high altitude in the form of solid gravity flow, thereby achieving gravitational potential energy storage. The high-altitude stacking area receives the gravity storage elements 900 from the high-altitude distribution section 121 and stacks the gravity storage elements 900 in multiple rows and columns to save floor space. When the energy storage system 2000 needs to release the gravitational potential energy and feed back the electrical energy to the power grid, the gravity storage elements 900 in the high-altitude stacking area are transferred to the high-altitude distribution section 121 and flow to the low altitude in the form of solid gravity flow through the gravity storage element moving track 100.

[0102] Further, the low-altitude stacking area and the high-altitude stacking area are both provided with a transverse track beam 2300, a travelling crane 2310 cooperating with the transverse track beam 2300, a left stacking travelling crane and a right stacking travelling crane cooperating with the travelling crane 2310, and a loading and unloading travelling crane. The left stacking travelling crane and the right stacking travelling crane run on the left and right sides of the low-altitude section 110 or the high-altitude section 120, and the loading and unloading travelling crane runs above the low-altitude section 110 or the high-altitude section 120 to unload the gravity storage elements 900 on the low-altitude section 110 or the high-altitude section 120 to the left and right sides of the low-altitude section 110 or the high-altitude section 120, and then the left stacking travelling crane and the right stacking travelling crane respectively stack the gravity storage elements 900 to the stacking areas on the left and right sides of the low-altitude section 110 or the high-altitude section 120.

[0103] In this embodiment, the transverse track beam 2300 can guide the movement of the left stacking travelling crane so that the left stacking travelling crane can move in the left stacking area to transfer or place the gravity storage elements 900 in the left stacking area. The transverse track beam 2300 can guide the movement of the right stacking travelling crane so that the right stacking travelling crane can move in the right stacking area to transfer or place the gravity storage elements 900 in the right stacking area, thereby enabling the low-altitude stacking area and the high-altitude stacking area to both have left and right stacking areas to stack the gravity storage elements 900 or quickly transfer the gravity storage elements 900 from the left and right stacking areas to the gravity storage element moving track 100.

[0104] In this embodiment, the loading and unloading trolley can move left and right to facilitate the lifting of the gravity energy storage element 900 and transferring it to the left or right side of the track of the low-altitude collection and distribution section 111 or the high-altitude collection and distribution section 121. The loading and unloading trolley is provided with a lifting hook, which can lift the gravity energy storage element 900 to achieve the transfer and stacking of the gravity energy storage element 900.

[0105] Further, the energy storage system 2000 further comprises a system main controller 2400, a power grid access device 2500, and a power grid, the power grid access device 2500 is electrically connected to the linear motor stator group, and the power grid access device 2500 is further electrically connected to the power grid, so as to absorb or release the electric energy of the power grid through the linear motor stator group and the linear motor rotor group.

[0106] In this embodiment, the system main controller 2400 controls the power grid access device 2500 to input the electric energy of the power grid to the linear motor stator group and the linear motor rotor group to generate power, so that the gravity energy storage elements 900 on the entire inclined section 130 are transferred from the low-altitude place to the high-altitude place in the form of solid gravity flow, thereby realizing the conversion of the electric energy of the power grid into kinetic energy to change the potential energy of the solid gravity energy storage elements 900 and store them. The system main controller 2400 also controls the electronic stator group and the linear motor rotor group to push the gravity energy storage elements 900 at the high-altitude place to the inclined section 130 of the gravity energy storage element moving track 100, so that the gravity energy storage elements 900 on the entire inclined section 130 are transported from the high-altitude place to the low-altitude place in the form of solid gravity flow, thereby converting the gravitational potential energy into electric energy, and controls the power grid access device 2500 to receive the electric energy generated by the coupling of the main power stator and the main power rotor and feedback to the power grid. The energy storage system 2000 further comprises a first main power converter 2809, a second main power converter 2808, a third main power converter 2807, and a fourth main power converter 2806 electrically connected to the system main controller 2400, the bottom stator 210, the top stator 220, and the two side stators 230, so as to control the power of the power tunnel.

[0107] Further, the energy storage system 2000 further comprises a low-altitude yard control module 2600 and a high-altitude yard control module 2700, the low-altitude yard control module 2600 is used to control the gravity energy storage element 900 of the low-altitude yard 2100 to be separated or loaded from the low-altitude section 110, the high-altitude yard control module 2700 is used to control the gravity energy storage element 900 of the high-altitude yard 2200 to be separated or loaded from the high-altitude section 120, and the main controller is electrically connected with the low-altitude yard control module 2600 and the high-altitude yard control module 2700. The low-altitude yard control module 2600 controls the gravity energy storage element 900 of the low-altitude yard 2100 to run. The high-altitude yard control module 2700 controls the gravity energy storage element 900 of the high-altitude yard 2200 to move, so as to facilitate the energy storage or release automation of the energy storage system 2000.

[0108] The above is the preferred embodiment of the application. It should be pointed out that for those skilled in the art, without departing from the principles of the application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the application.

Claims

1. A solid gravity flow carrier apparatus, characterized by, The solid gravity flow carrier device comprises a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator group and a linear motor rotor group, the gravity energy storage element moving track is used to guide the lifting movement of the gravity energy storage elements, the gravity energy storage element moving track has 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, the inclined section is provided with a power tunnel, the power tunnel has a tunnel bottom, a tunnel top opposite to the tunnel bottom and two tunnel sides, the linear motor stator group comprises a bottom stator fixed to the tunnel bottom, a top stator fixed to the tunnel top and a side stator fixed to the tunnel side, the linear motor rotor group comprises a bottom rotor, a top rotor and a side rotor fixed to each of the gravity energy storage elements, the bottom rotor, the top rotor and the side rotor are respectively fixed to the bottom, the top and the side of the gravity energy storage elements, when a plurality of gravity energy storage elements are continuously pushed into the power tunnel from the low-altitude section, the bottom rotor, the top rotor and the side rotor are respectively electromagnetically coupled with the bottom stator, the top stator and the side stator to convert electric energy into driving power to drive the plurality of gravity energy storage elements to continuously push and move to the high-altitude section, when a plurality of gravity energy storage elements are continuously pushed into the power tunnel from the high-altitude section, the plurality of gravity energy storage elements continuously push and move through the power tunnel under the action of gravity, the bottom rotor, the top rotor and the side rotor are respectively electromagnetically coupled with the bottom stator, the top stator and the side stator to convert mechanical kinetic energy into electric energy, and the plurality of gravity energy storage elements continuously push and move to the low-altitude section to be lifted to the power tunnel of the high-altitude section again next time.

2. The solid gravity flow carrier apparatus of claim 1, wherein, The tunnel side is provided with a first limiting rail and a second limiting rail, the first limiting rail and the second limiting rail extend along the length direction of the power tunnel, the first limiting rail and the second limiting rail are respectively close to the tunnel top and the tunnel bottom, the side of the gravity energy storage element is provided with a first side limiting wheel and a second side limiting wheel, after the gravity energy storage element enters the power tunnel, the first side limiting wheel and the second side limiting wheel are respectively limitedly matched with the end face of the first limiting rail and the end face of the second limiting rail.

3. The solid gravity flow carrier apparatus of claim 1, wherein, The power tunnel is arranged at the part of the inclined section close to the low-altitude section.

4. The solid gravity flow carrier apparatus of claim 1, wherein, The gravity energy storage element moving track is provided with two parallel rails, the bottom of the gravity energy storage element is provided with two rows of track wheels, the track wheels are respectively matched with the rails, and the bottom rotor is located between the two rows of track wheels.

5. The solid gravity flow carrier apparatus of claim 1, wherein, The low-altitude section has a low-altitude collecting and distributing section, a low-altitude buffer conveying section and a low-altitude receiving and sending section connected in sequence, the low-altitude collecting and distributing section is used for collecting and distributing the gravity energy storage elements, the low-altitude buffer conveying section transfers and conveys the gravity energy storage elements between the low-altitude collecting and distributing section and the low-altitude receiving and sending section, and the low-altitude receiving and sending section is used to push the gravity energy storage elements to the inclined section when storing energy.

6. The solid gravity flow carrier apparatus of claim 5, wherein, The linear motor stator group comprises low-altitude motor stators fixed to the low-altitude collecting and distributing section, the low-altitude buffer conveying section and the low-altitude receiving and sending section, and the low-altitude motor stators are electromagnetically coupled with the bottom mover to drive the movement of the gravity energy storage elements in the low-altitude collecting and distributing section, the low-altitude buffer conveying section and the low-altitude receiving and sending section.

7. The solid gravity flow carrier apparatus of claim 1, wherein, The high-altitude section has a high-altitude collecting and distributing section, a high-altitude buffer conveying section and a high-altitude receiving and sending section connected in sequence, the high-altitude collecting and distributing section is used for the collecting and distributing transportation of the gravity energy storage elements, the high-altitude buffer conveying section is used for the transfer conveying of the gravity energy storage elements between the high-altitude collecting and distributing section and the high-altitude receiving and sending section, and the high-altitude receiving and sending section is used for pushing the gravity energy storage elements to the inclined section when the energy is released.

8. The solid gravity flow carrier apparatus of claim 7, wherein, The linear motor stator group comprises high-altitude motor stators fixed to the high-altitude collecting and distributing section, the high-altitude buffer conveying section and the high-altitude receiving and sending section, and the high-altitude motor stators are electromagnetically coupled with the bottom mover to drive the movement of the gravity energy storage elements in the high-altitude collecting and distributing section, the high-altitude buffer conveying section and the high-altitude receiving and sending section.

9. The solid gravity flow carrier apparatus of claim 1, wherein, The solid gravity flow carrying device further comprises a low-altitude braking section connected to the end of the low-altitude section away from the power tunnel, which is used for braking the gravity energy storage elements entering the low-altitude section when the system is instructed to stop or fails to stop.

10. The solid gravity flow carrier apparatus of claim 9, wherein, The low-altitude braking section comprises a braking tunnel and a plurality of brake elements arranged in the braking tunnel, the plurality of brake elements are sequentially and continuously abutted in the braking tunnel, the outer side of the brake element is provided with at least one pair of brake pads, and the braking tunnel is provided with brake rails matched with the at least one pair of brake pads, when the gravity energy storage element abuts against the brake element and the at least one pair of brake pads clamps the brake rail, the brake element brakes the gravity energy storage element.

11. The solid gravity flow carrier apparatus of claim 10, wherein, The linear motor stator group further comprises a track motor stator fixed between the two brake rails, the bottom of the brake element is provided with two rows of brake element track wheels, the linear motor mover group further comprises a reset motor mover fixed to the bottom of the brake element and located between the two rows of brake element track wheels, and the reset motor mover is coupled with the track motor stator to drive the reset of the brake element.

12. The solid gravity flow carrier apparatus of claim 10, wherein, The outer side of the brake element is provided with a brake support, and the brake support is provided with at least one driving element, each driving element corresponding to drive the brake pad to clamp the brake rail.

13. The solid gravity flow carrier apparatus of claim 12, wherein, The opposite sides of the brake element are each provided with two brake supports, and the two brake supports are respectively close to the top and the bottom of the brake element, a plurality of driving elements and a plurality of pairs of brake pads are arranged on each brake support.

14. The solid gravity flow carrier apparatus of claim 1, wherein, The front and back ends of the gravity energy storage element are respectively provided with a pushing boss and a pushing recess, the pushing boss of the front end of the gravity energy storage element box and the pushing recess of the back end of the front gravity energy storage element box abut, the pushing recess of the back end of the gravity energy storage element box and the pushing boss of the front end of the back gravity energy storage element box abut, the gravity energy storage elements from the low-altitude section to the high-altitude section abut in series, and are linked together under the action of power or gravity to form a solid gravity flow.

15. An energy storage system characterized by, The energy storage system comprises the solid gravity flow carrying device according to any one of claims 1 to 14, and further comprises a low-altitude stacking yard and a high-altitude stacking yard, the low-altitude section passes through the low-altitude stacking yard, and the high-altitude section passes through the high-altitude stacking yard, when the energy storage system stores energy, the low-altitude stacking yard delivers the gravity energy storage elements to the low-altitude section, and the high-altitude stacking yard receives and stores the gravity energy storage elements from the high-altitude section, when the solid gravity energy storage system releases energy, the high-altitude stacking yard delivers the gravity energy storage elements to the high-altitude section, and the low-altitude stacking yard receives and stores the gravity energy storage elements from the low-altitude section.

16. The energy storage system of claim 15, wherein, The low-altitude stacking yard is provided with a low-altitude stacking area which is connected to the low-altitude section and is used to store the gravity energy storage elements in a stacked manner when the system releases energy, and the high-altitude stacking yard is provided with a high-altitude stacking area which is connected to the high-altitude section and is used to store the gravity energy storage elements in a stacked manner when the system stores energy.

17. The energy storage system of claim 16, wherein, The low-altitude stacking area and the high-altitude stacking area are both provided with a cross rail of a travelling crane, a left stacking travelling crane and a right stacking travelling crane which are matched with the cross rail of the travelling crane, and a loading and unloading travelling crane, the left and right stacking travelling cranes run on the left and right sides of the low-altitude section or the high-altitude section, and the loading and unloading travelling crane runs below the left and right stacking travelling cranes by several meters lower than the cross rail of the travelling crane on the low-altitude section or the high-altitude section, and is used to unload the gravity energy storage elements on the low-altitude section or the high-altitude section to the left and right sides of the low-altitude section or the high-altitude section, and then the left and right stacking travelling cranes respectively stack the gravity energy storage elements to the stacking areas on the left and right sides of the low-altitude section or the high-altitude section.

18. The energy storage system of claim 17, wherein, The low-altitude stacking yard and the high-altitude stacking yard are both provided with a plurality of rows of travelling crane arrays, each row of the travelling crane arrays is provided with a left stacking travelling crane and a right stacking travelling crane, and the loading and unloading travelling crane is arranged between the left and right stacking travelling cranes and above the low-altitude section or the high-altitude section.

19. The energy storage system of claim 15, wherein, The energy storage system further comprises a system main controller, a power grid access device and a power grid, the power grid access device is electrically connected to the linear motor stator group, and the power grid access device is further electrically connected to the power grid, so as to absorb the electric energy of the power grid through the linear motor stator group and the linear motor rotor group, or release the electric energy to the power grid.

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