Gravity energy storage system

Abstract

The invention discloses a gravity energy storage system, and belongs to the technical field of electric energy storage systems, the gravity energy storage system comprises a mountain base body, an annular track, a bearing vehicle, a mass block synchronizing device, a mass block, an upper stack area and a lower stack area, the annular track is arranged on the side face of the mountain base body, and the lower stack area and the mass block synchronizing device are arranged in the bottom area of the mountain base body; an upper stacking area and a mass block synchronizing device are arranged at the top of the mountain base body, the bearing vehicle moves along the annular rail, and the mass block synchronizing device loads mass blocks into the bearing vehicle or unloads the mass blocks from the bearing vehicle. According to the gravity energy storage system, loading and unloading of the mass blocks can be completed without shutdown, the multiple bearing vehicles move on the annular track, the charging and discharging working conditions of the whole gravity energy storage system are controlled by controlling loading and unloading of the bearing vehicles bearing the mass blocks on the left side and the right side, and the rapid charging and discharging working condition switching function of the system is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric energy storage systems, and in particular to a gravity energy storage system. BACKGROUND

[0002] Gravity energy storage is a large-scale physical energy storage technology based on the principle of gravitational potential energy. Its core mechanism is to store electrical energy by lifting heavy objects (such as concrete blocks, metal blocks, or water) using an electric drive system, and to generate electricity by driving a generator when needed. With the global energy structure accelerating towards renewable energy with intermittent characteristics such as wind power and photovoltaic, the demand for large-scale energy storage technology with long-term energy storage capability and low electricity cost is increasingly urgent. In this context, traditional pumped storage is difficult to be widely promoted due to geographical conditions, while lithium battery energy storage faces problems such as high cost and resource constraints. These factors have collectively driven gravity energy storage technology to become an important research direction in the current energy storage field.

[0003] Modern gravity energy storage technology has entered a rapid development stage since 2010, with a variety of innovative technology routes emerging: solid heavy object stacking type (such as Energy Vault's tower crane system), slope rail train type (such as ARES's electric train system), abandoned mine shaft type (such as Gravitricity's deep well system), etc. These technical solutions generally have significant advantages: system life can reach 30-50 years, far exceeding chemical batteries; the degree of electricity cost can be controlled at a relatively low level of 0.05-0.15 dollars per kilowatt-hour; and the physical energy storage method is completely free of chemical pollution, with outstanding environmental protection characteristics. In addition, the gravity energy storage system is flexible and adjustable in size, and can be used for distributed small energy storage as well as expanded to large-scale grid-level applications.

[0004] Gravity energy storage systems face multiple technical challenges in realizing non-stop switching: first, the inertia of the mechanical system causes a response delay when switching the direction of the heavy object movement, and the motor needs to be quickly converted from the motor mode to the generator mode, and the transmission mechanism also needs to withstand the impact caused by the sudden change in direction; second, power fluctuations are likely to occur during the switching process, affecting the stability of the grid frequency, which is particularly critical for systems participating in frequency modulation services. In addition, the switching process is accompanied by significant energy conversion efficiency loss, including kinetic energy loss and additional energy consumption during the transition phase, which can reduce the overall efficiency of the system by 5%-10%. The design of the safety protection mechanism also faces challenges, and needs to balance between overload protection and fast switching, emergency braking and smooth transition. SUMMARY

[0005] The purpose of this invention is to provide a gravity energy storage system that can complete the loading and unloading of mass blocks without shutting down the system. Multiple carrier vehicles move on a circular track. The charging and discharging conditions of the entire gravity energy storage system are controlled by controlling the loading and unloading of the carrier vehicles carrying mass blocks on the left and right sides, thereby realizing the system's rapid charging and discharging condition switching function.

[0006] To achieve the above objectives, the present invention provides a gravity energy storage system, comprising a mountain base, a circular track, a carrier vehicle, a mass block synchronization device, mass blocks, an upper stacking area, and a lower stacking area. The circular track is provided on the side of the mountain base, the lower stacking area and the mass block synchronization device are provided at the bottom of the mountain base, and the upper stacking area and the mass block synchronization device are provided at the top of the mountain base. The carrier vehicle moves along the circular track, and the mass block synchronization device loads the mass blocks into the carrier vehicle or unloads the mass blocks from the carrier vehicle.

[0007] Preferably, the mass block synchronization device includes a synchronization connection device, an electromagnetic push-pull device, a ball bearing conveyor chain, and a synchronization track. The synchronization connection device and the electromagnetic push-pull device are mounted on the same connecting plate and move together along the synchronization track. The ball bearing conveyor chain is mounted on the top and bottom areas of the mountain base, and is parallel to the top and bottom edges of the circular track. The mass block slides on the ball bearing conveyor chain.

[0008] Preferably, the synchronous docking device includes a synchronous rod, and a pantograph is provided on the front side wall of the carrier vehicle. The synchronous rod contacts the pantograph, so that the carrier vehicle, the synchronous docking device and the mass block it carries move at the same speed.

[0009] Preferably, the electromagnetic push-pull device includes a push-pull rod, the end of which is electromagnetically attracted to a mass block, and the push-pull rod loads the mass block into the carrier vehicle or unloads the mass block from the carrier vehicle.

[0010] Preferably, the carrier includes rollers, an electro-hydraulic device, an in-vehicle sensor c, and a protective rod. The carrier is U-shaped, with multiple rollers arranged on the inner wall of the carrier. The in-vehicle sensor c is arranged on the inner wall of the carrier to monitor whether the mass block has completely entered or left the vehicle body. An electro-hydraulic device is installed on the top of the carrier, and a hydraulic sensor is installed inside the electro-hydraulic device. The hydraulic sensor determines that the mass block has completely entered the carrier and then activates the electro-hydraulic device to stabilize the mass block. The protective rod and the motor are both located on the top of the carrier, and the motor drives the protective rod to rotate.

[0011] Preferably, track sensor a and track sensor b are provided on the circular track, with track sensor a located on the upper part of the right side of the circular track and track sensor b located on the lower part of the left side of the circular track.

[0012] Preferably, the distance between each of the vehicles is L.

[0013] Preferably, the charging method comprises the following steps: The running direction of the carrying vehicle on the circular track is counterclockwise. The carrying vehicle starts from the lower stack area. Before starting, the carrying vehicle loaded with the mass block runs to the track sensor a along the positive direction of the X axis of the track. When the synchronization connection device of the upper stack area receives a signal to prepare for synchronization connection, the synchronization motor pre-accelerates the electromagnetic push-pull device of the upper stack area in the reverse direction of the X axis. After the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on. The motor above the carrying vehicle drives the protection rod to open to both sides, and the electro-hydraulic device is closed. After the electromagnetic push-pull device moves to the mass block along the positive direction of the Y axis, the electromagnetic device starts to suck the mass block to move in the reverse direction of the Y axis to complete the unloading of the mass block. After the mass block completely leaves the vehicle body, the in-vehicle sensor c inside the carrying vehicle sends a signal to make the motor above the carrying vehicle start to retract the protection rod. The synchronization connection device moves along the synchronization track to the track corner. The synchronization rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off. The carrying vehicle continues to move forward along the track to the track sensor b. The lower stack synchronization device receives a signal. The synchronization motor pre-accelerates the electromagnetic push-pull device carrying the mass block in the positive direction of the X axis. After the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on. The motor above the carrying vehicle drives the protection rod to open to both sides. The electromagnetic push-pull device of the lower stack area pushes the pre-sucked mass block into the carrying vehicle along the reverse direction of the Y axis. After the mass block completely enters the vehicle body, the in-vehicle sensor c inside the carrying vehicle sends a signal to start the electro-hydraulic device. At the same time, the motor above the carrying vehicle starts to retract the protection rod. After the electro-hydraulic device completely compacts the mass block, the hydraulic sensor starts the electro-hydraulic device to stop. The synchronization connection device moves along the synchronization track to the track corner. The synchronization rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off. After that, the carrying vehicle moves in the positive direction of the X axis to continue the next cycle.

[0014] Preferably, the discharging method comprises the following steps: The carrying vehicle starts from the upper stack area. Before starting, the carrying vehicle loaded with the mass block runs to the track sensor b along the reverse direction of the X axis of the track. When the synchronization connection device of the lower stack area receives a signal to prepare for synchronization connection, the synchronization motor pre-accelerates the electromagnetic push-pull device of the lower stack area in the positive direction of the X axis. After the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on. The motor above the carrying vehicle drives the protection rod to open to both sides, and the electro-hydraulic device is closed. After the electromagnetic push-pull device moves to the mass block along the reverse direction of the Y axis, the electromagnetic push-pull device starts to suck the mass block to move in the positive direction of the Y axis to complete the unloading of the mass block. After the mass block completely leaves the vehicle body, the in-vehicle sensor c inside the carrying vehicle sends a signal to make the motor above the carrying vehicle start to retract the protection rod. The synchronization connection device moves along the synchronization track to the track corner. The synchronization rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off. The carrying vehicle continues to move forward along the positive direction of the track X axis to the track sensor a, the synchronous connection device of the lower stack area receives a signal, the synchronous motor pre-accelerates the electromagnetic push-pull device carrying the mass in the reverse direction of X, after the synchronous rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered, the motor above the carrying vehicle starts to drive the protection rod to open to both sides, the electromagnetic push-pull device of the upper stack area pushes the pre-absorbed mass into the carrying vehicle in the positive direction of Y axis, after the mass completely enters the vehicle body, the in-vehicle sensor c of the carrying vehicle sends a signal, the electro-hydraulic device starts, at the same time, the motor above the carrying vehicle starts to retract the protection rod, after the electro-hydraulic device completely compacts the mass, the hydraulic sensor starts the hydraulic device to stop, the synchronous connection device moves along the synchronous track to the track corner, the synchronous rod is disconnected with the carrying vehicle, after the carrying vehicle is powered off, the carrying vehicle moves in the reverse direction of X to continue the next cycle.

[0015] Preferably, taking the charging and discharging as an example, after the system receives the working condition conversion signal, the synchronous connection devices of the upper stack area and the lower stack area convert functions, the track sensor a only pre-accelerates the synchronous connection device when the in-vehicle sensor c is not started, that is, only when the empty vehicle passes, the synchronous connection device is started to pre-accelerate to complete the loading or unloading of the mass, so that the mass in the charging working condition continues to run after reaching the top of the mountain body without entering the upper stack area, and is converted to downward power generation.

[0016] The advantages and positive effects of the gravity energy storage system are as follows: 1. The gravity energy storage system can realize the switching of charging and discharging working conditions in the state of not stopping through controlling the working conditions of the synchronous devices of the upper stack area and the lower stack area.

[0017] 2. The inside of the carrying vehicle is composed of four rollers, which can greatly reduce the friction loss of the mass entering the vehicle body.

[0018] 3. The carrying vehicle is provided with a pantograph, which can provide power for the carrying vehicle when connected with the synchronous rod, so as to provide power for the electro-hydraulic device on the carrying vehicle and the motor installed on the top of the carrying vehicle.

[0019] The technical solutions of the present application will be further described in detail through the drawings and examples. DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the gravity energy storage system of the present application; Figure 2 It is a schematic diagram of the upper stack area of the present application; Figure 3 It is a schematic diagram of the lower stack area of the present application; Figure 4 It is a schematic diagram of the connection structure of the synchronous connection device and the push-pull device of the present application; Figure 5 Fig. 1 is a schematic diagram of the connection structure of the ring track and the carrying vehicle of the present application; Figure 6 Fig. 2 is a schematic diagram of the structure of the carrying vehicle of the present application; Figure 7 Fig. 3 is a schematic diagram of the position of the carrying vehicle and the synchronous connection device at different times of the present application; Figure 8 Fig. 4 is a flow chart of the circulation process of the carrying vehicle of the present application; Figure 9 Fig. 5 is a flow chart of the charging process of the gravity energy storage system of the present application; Figure 10 Fig. 6 is a flow chart of the discharging process of the gravity energy storage system of the present application.

[0021] Reference signs 1, mountain base; 2, mountain base bottom area; 3, ring track; 301, track sensor a; 302, track sensor b; 4, carrying vehicle; 401, roller; 402, electro-hydraulic device; 403, in-vehicle sensor c; 404, protection rod; 405, pantograph; 5, synchronous connection device; 501, synchronous rod; 6, electromagnetic push-pull device; 601, push-pull rod; 7, ball conveying chain; 8, synchronous track; 9, upper stacking area; 10, lower stacking area; 11, mass block. DETAILED DESCRIPTION

[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In the present application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. If there is any inconsistency, the meaning described in the specification or derived from the content described in the specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0024] The embodiments of the present application will be described in detail below with reference to the drawings.

[0025] As Figures 1-10 shown, a gravity energy storage system includes a mountain base body 1, a ring track 3, a carrying vehicle 4, a mass block synchronization device, a mass block 11, an upper stacking area 9 and a lower stacking area 10, the side of the mountain base body 1 is provided with the ring track 3, the bottom area 2 of the mountain base body is provided with the lower stacking area 10 and the mass block 11 synchronization device, and the top of the mountain base body 1 is provided with the upper stacking area 9 and the mass block 11 synchronization device. The carrying vehicle 4 moves along the ring track 3, and the mass block 11 synchronization device loads the mass block 11 into the carrying vehicle 4 or unloads the mass block 11 from the carrying vehicle 4.

[0026] The mass block synchronization device includes a synchronization connecting device 5, an electromagnetic push-pull device 6, a ball conveying chain 7 and a synchronization track 8. The synchronization connecting device 5 and the electromagnetic push-pull device 6 are arranged on the same connecting plate and move together along the synchronization track 8. The ball conveying chain 7 is arranged on the top of the mountain base body 1 and the bottom area 2 of the mountain base body, and the ball conveying chain 7 is arranged in parallel with the top edge and the bottom edge of the ring track 3. The mass block 11 slides on the ball conveying chain 7.

[0027] Specifically, the synchronization motor drives the mass block synchronization device, and the loading of the mass block 11 is completed through the cooperation of the synchronization rod 501 and the synchronization motor. First, the synchronization motor pre-accelerates the synchronization connecting device 5 at a speed slightly slower than the running speed of the carrying vehicle 4. After the front end of the carrying vehicle 4 contacts the synchronization rod 501 through the pantograph 405, the electromagnetic push-pull device 6 pushes the mass block 11 into or unloads the mass block 11 from the carrying vehicle 4, thereby completing the synchronous loading or unloading of the mass block 11.

[0028] Specifically, the ball conveying chain 7 is composed of equidistant balls to realize the low-friction movement of the mass block on the ball conveying chain 7.

[0029] The synchronization connecting device 5 includes a synchronization rod 501, and the pantograph 405 is arranged on the side wall of the front end of the carrying vehicle 4. The synchronization rod 501 contacts the pantograph 405, so that the carrying vehicle 4, the synchronization connecting device 5 and the carried mass block 11 move at the same speed.

[0030] The electromagnetic push-pull device 6 includes a push-pull rod 601, and the end of the push-pull rod 601 electromagnetically attracts the mass block 11. The push-pull rod 601 loads the mass block 11 into the carrying vehicle 4 or unloads the mass block 11 from the carrying vehicle 4.

[0031] The carrier 4 includes rollers 401, an electro-hydraulic device 402, an in-vehicle sensor c403, and a protective rod 404. The carrier 4 is U-shaped, with multiple rollers 401 mounted on its inner wall. The in-vehicle sensor c403 is mounted on the inner wall of the carrier 4 to monitor whether the mass block 11 has completely entered or left the vehicle body.

[0032] Specifically, rollers 401 are installed on all four sides of the interior of the carrier vehicle 4. The addition of rollers 401 reduces the friction force on the mass block 11, which allows the mass block 11 to enter the interior of the carrier vehicle 4 more smoothly.

[0033] An electro-hydraulic device 402 is installed on the top of the interior of the carrier vehicle 4. A hydraulic sensor is installed inside the electro-hydraulic device 402. The electro-hydraulic device 402 is activated after the hydraulic sensor determines that the mass block 11 has completely entered the carrier vehicle 4. Once the mass block 11 is fully inside the vehicle body, the electro-hydraulic device 402 is activated to stabilize the mass block 11. A protective rod 404 and a motor are both located on the top of the carrier vehicle 4. The motor drives the protective rod 404 to rotate.

[0034] Specifically, after the mass block 11 is fully inside the carrier vehicle 4, the motor controls the protective rod 404 to rotate to both sides of the carrier vehicle to ensure that the mass block 11 operates stably during the operation of the carrier vehicle 4.

[0035] Track sensor a301 and track sensor b302 are installed on the circular track 3. Track sensor a301 is located on the upper part of the right side of the circular track 3, and track sensor b302 is located on the lower part of the left side of the circular track 3.

[0036] The interval between each vehicle is L.

[0037] A gravity energy storage system includes a charging method, comprising the following steps: The running direction of the carrying vehicle 4 on the circular track 3 is counterclockwise, the carrying vehicle 4 starts from the lower stacking area 10, before starting, the carrying vehicle 4 loaded with the mass block 11 runs along the track X axis positive direction to the track sensor a301, the synchronous connection device 5 of the upper stacking area 9 receives the signal to prepare for synchronous connection, the synchronous motor pre-accelerates the electromagnetic push-pull device 6 of the upper stacking area 9 along the X axis negative direction, after the synchronous rod 501 contacts with the pantograph 405 at the front end of the carrying vehicle 4, the carrying vehicle 4 is powered, the motor above the carrying vehicle 4 drives the protection rod 404 to open to both sides, at the same time, the electro-hydraulic device 402 is closed, after the electromagnetic push-pull device 6 advances along the Y axis positive direction to the mass block 11, the electromagnetic device starts to suck the mass block 11 to move along the Y axis negative direction to complete the unloading of the mass block 11, after the mass block 11 completely leaves the vehicle body, the in-vehicle sensor c403 of the carrying vehicle 4 sends a signal to make the motor above the carrying vehicle 4 start to retract the protection rod 404, the synchronous connection device 5 moves along the synchronous track 8 to the track corner, the synchronous rod 501 is disconnected with the carrying vehicle 4, and the carrying vehicle 4 is powered off.

[0038] The carrying vehicle 4 continues to advance along the track to the track sensor b302, the lower stacking synchronization device receives the signal, the synchronous motor pre-accelerates the electromagnetic push-pull device 6 carrying the mass block 11 along the X positive direction, after the synchronous rod 501 contacts with the pantograph 405 at the front end of the carrying vehicle 4, the carrying vehicle 4 is powered, the motor above the carrying vehicle 4 starts to drive the protection rod 404 to open to both sides, the electromagnetic push-pull device 6 of the lower stacking area 10 pushes the pre-sucked mass block 11 along the Y axis negative direction into the carrying vehicle 4, after the mass block 11 completely enters the vehicle body, the in-vehicle sensor c403 inside the carrying vehicle 4 sends a signal, the electro-hydraulic device 402 is started, at the same time, the motor above the carrying vehicle 4 starts to retract the protection rod 404, after the electro-hydraulic device 402 completely compacts the mass block 11, the hydraulic sensor starts the electro-hydraulic device 402 to stop, the synchronous connection device 5 moves along the synchronous track 8 to the track corner, the synchronous rod 501 is disconnected with the carrying vehicle 4, and the carrying vehicle 4 is powered off, after the carrying vehicle 4 moves along the X axis positive direction to continue the next cycle.

[0039] A gravity energy storage system, comprising a discharging method, the steps are as follows: The carrying vehicle 4 starts from the upper stacking area 9, and before starting, the carrying vehicle loaded with the mass blocks 11 runs to the track sensor b302 in the reverse direction of the X-axis, and the synchronous connection device 5 of the lower stacking area 10 receives a signal to prepare for synchronous connection. The synchronous motor pre-accelerates the electromagnetic push-pull device 6 of the lower stacking area 10 in the positive direction of the X-axis. When the synchronous rod 501 contacts the pantograph 405 at the front end of the carrying vehicle 4, the carrying vehicle 4 is powered on. The motor above the carrying vehicle 4 drives the protection rod 404 to open to both sides, and the electromagnetic push-pull device 6 advances to the mass blocks 11 in the reverse direction of the Y-axis. After the electromagnetic push-pull device 6 starts to suck the mass blocks 11 and moves in the positive direction of the Y-axis, the unloading of the mass blocks 11 is completed. After the mass blocks 11 completely leave the vehicle body, the in-vehicle sensor c403 inside the carrying vehicle 4 sends a signal to make the motor above the carrying vehicle 4 start to retract the protection rod 404. The synchronous connection device 5 moves to the track corner along the synchronous track 8, the synchronous rod 501 is disconnected from the carrying vehicle 4, and the carrying vehicle 4 is powered off.

[0040] The carrying vehicle 4 continues to advance in the positive direction of the X-axis to the track sensor a301, and the synchronous connection device 5 of the lower stacking area 10 receives a signal. The synchronous motor pre-accelerates the electromagnetic push-pull device 6 carrying the mass blocks 11 in the reverse direction of the X-axis. When the synchronous rod 501 contacts the pantograph 405 at the front end of the carrying vehicle 4, the carrying vehicle 4 is powered on. The motor above the carrying vehicle 4 drives the protection rod 404 to open to both sides. The electromagnetic push-pull device 6 of the upper stacking area 9 pushes the pre-sucked mass blocks 11 into the carrying vehicle 4 in the positive direction of the Y-axis. After the mass blocks 11 completely enter the vehicle body, the in-vehicle sensor c403 of the carrying vehicle 4 sends a signal, and the electro-hydraulic device 402 starts to work. At the same time, the motor above the carrying vehicle 4 starts to retract the protection rod 404. After the electro-hydraulic device 402 completely compacts the mass blocks 11, the hydraulic sensor starts the hydraulic device to stop. The synchronous connection device 5 moves to the track corner along the synchronous track 8, the synchronous rod 501 is disconnected from the carrying vehicle 4, and the carrying vehicle 4 is powered off. After that, the carrying vehicle 4 moves in the reverse direction of the X-axis to continue the next cycle.

[0041] Taking the charging and discharging as an example, after the system receives the working condition conversion signal, the synchronous connection device of the upper stacking area and the lower stacking area converts the function. The track sensor a301 will only pre-accelerate the synchronous connection device 5 when the in-vehicle sensor c403 is not started, that is, only when the empty vehicle passes through, the synchronous connection device 5 will be pre-accelerated to complete the loading or unloading of the mass blocks 11, so that the mass blocks in the charging working condition continue to run after reaching the top of the mountain body 1 and convert to downward power generation.

[0042] One specific embodiment is that the power demand P of the power grid is 1 MW, the height of the mountain body, that is, the vertical track H is 150 m, the length of the horizontal track is 45 m, the length of the mass block l is 2 m, the width w is 1 m, the height h is 1 m, and the density of the mass block is 2.7 t / m3. For 2500 kg / m 3 The running speed of the carrying vehicle is 2 m / s.

[0043] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can still be modified or equivalently replaced, and these modifications or equivalent replacements should not make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A gravitational energy storage system characterized by: The mountain body base is provided with a ring-shaped track on the side surface, a lower stacking area and a mass block synchronization device on the bottom area, and an upper stacking area and a mass block synchronization device on the top.

2. A gravitational energy storage system according to claim 1, characterized in that: The mass block synchronization device comprises a synchronous connection device, an electromagnetic push-pull device, a ball conveying chain and a synchronous track.

3. A gravitational energy storage system according to claim 2, wherein: The synchronous connection device comprises a synchronous rod, and a pantograph is arranged on the side wall of the head of the carrying vehicle.

4. A gravitational energy storage system according to claim 3, wherein: The electromagnetic push-pull device comprises a push-pull rod, and the end of the push-pull rod is electromagnetically attracted to the mass block.

5. A gravitational energy storage system according to claim 4, wherein: The carrying vehicle comprises a roller, an electro-hydraulic device, an in-vehicle sensor c and a protection rod. The top of the inside of the carrying vehicle is provided with an electro-hydraulic device, and a hydraulic sensor is arranged in the electro-hydraulic device.

6. A gravitational energy storage system according to claim 5, wherein: The interval distance of each carrying vehicle is L.

7. A gravitational energy storage system according to claim 6, characterized in that: The charging method comprises the following steps:

8. A gravitational energy storage system according to claim 7, characterized in that: The running direction of the carrying vehicle on the ring-shaped track is counterclockwise, and the carrying vehicle starts from the lower stacking area. When the carrying vehicle loaded with the mass block runs to the track sensor a along the positive direction of the X axis, the synchronous connection device of the upper stacking area receives a signal to prepare for synchronous connection. After the synchronous rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on. The motor above the carrying vehicle drives the protection rod to open to both sides, and the electro-hydraulic device is closed. After the electromagnetic device starts to attract the mass block and moves in the reverse direction of the Y axis to complete the unloading of the mass block, the in-vehicle sensor c of the carrying vehicle sends a signal to make the motor above the carrying vehicle retract the protection rod. The synchronous connection device moves to the track corner along the synchronous track, the synchronous rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off. The carrying vehicle continues to move along the track to track sensor b, the synchronization device of the lower stack area receives a signal, the synchronization motor pre-accelerates the electromagnetic push-pull device carrying the mass along the positive direction of the X axis, after the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on, the motor above the carrying vehicle starts to drive the protection rod to open to both sides, the electromagnetic push-pull device of the lower stack area pushes the pre-absorbed mass into the carrying vehicle along the negative direction of the Y axis, after the mass completely enters the vehicle body, the in-vehicle sensor c inside the carrying vehicle sends a signal, the electro-hydraulic device starts to work, at the same time, the motor above the carrying vehicle starts to retract the protection rod, after the electro-hydraulic device completely compacts the mass, the hydraulic sensor stops the electro-hydraulic device, the synchronous connection device moves along the synchronization track to the track corner, the synchronization rod is disconnected from the carrying vehicle, after the carrying vehicle is powered off, the carrying vehicle moves along the positive direction of the X axis to continue the next cycle.

9. A gravitational energy storage system according to claim 8, characterized in that: The discharge method comprises the following steps: The carrying vehicle starts from the upper stack area, before starting, the carrying vehicle loaded with the mass moves along the track in the negative direction of the X axis to track sensor b, the synchronization connection device of the lower stack area receives a signal to prepare for synchronization connection, the synchronization motor pre-accelerates the electromagnetic push-pull device of the lower stack area along the positive direction of the X axis, after the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on, the motor above the carrying vehicle drives the protection rod to open to both sides, at the same time, the electro-hydraulic device is closed, after the electromagnetic push-pull device moves to the mass along the negative direction of the Y axis, the electromagnetic push-pull device starts to absorb the mass and moves along the positive direction of the Y axis to complete the unloading of the mass, after the mass completely leaves the vehicle body, the in-vehicle sensor c inside the carrying vehicle sends a signal to make the motor above the carrying vehicle start to retract the protection rod, the synchronization connection device moves along the synchronization track to the track corner, the synchronization rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off; The carrying vehicle continues to move along the track in the positive direction of the X axis to track sensor a, the synchronization connection device of the lower stack area receives a signal, the synchronization motor pre-accelerates the electromagnetic push-pull device carrying the mass along the negative direction of the X axis, after the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on, the motor above the carrying vehicle drives the protection rod to open to both sides, the electromagnetic push-pull device of the upper stack area pushes the pre-absorbed mass into the carrying vehicle along the positive direction of the Y axis, after the mass completely enters the vehicle body, the in-vehicle sensor c of the carrying vehicle sends a signal, the electro-hydraulic device starts to work, at the same time, the motor above the carrying vehicle starts to retract the protection rod, after the electro-hydraulic device completely compacts the mass, the hydraulic sensor stops the electro-hydraulic device, the synchronization connection device moves along the synchronization track to the track corner, the synchronization rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off; The carrying vehicle continues to move along the track in the positive direction of the X axis to track sensor a, the synchronization connection device of the lower stack area receives a signal, the synchronization motor pre-accelerates the electromagnetic push-pull device carrying the mass along the negative direction of the X axis, after the synchronization rod contacts the pantograph at the front end of the carrying vehicle, the carrying vehicle is powered on, the motor above the carrying vehicle drives the protection rod to open to both sides, the electromagnetic push-pull device of the upper stack area pushes the pre-absorbed mass into the carrying vehicle along the positive direction of the Y axis, after the mass completely enters the vehicle body, the in-vehicle sensor c of the carrying vehicle sends a signal, the electro-hydraulic device starts to work, at the same time, the motor above the carrying vehicle starts to retract the protection rod, after the electro-hydraulic device completely compacts the mass, the hydraulic sensor stops the electro-hydraulic device, the synchronization connection device moves along the synchronization track to the track corner, the synchronization rod is disconnected from the carrying vehicle, and the carrying vehicle is powered off; 10. A gravitational energy storage system according to claim 9, characterized in that: For example, in the case of charging and discharging, after receiving the working condition conversion signal, the synchronization connection device of the upper stack area and the lower stack area converts the function, and the track sensor a only makes the synchronization connection device pre-accelerate when the in-vehicle sensor c is not started, that is, only when the empty car passes, the synchronization connection device pre-acceleration is started to complete the loading or unloading of the mass block, and then the mass block in the charging working condition does not enter the upper stack area after reaching the top of the mountain body, and continues to run, and converts to downward power generation.

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