Multi-track parallel gravity energy storage heavy object stacking system

Abstract

The present application relates to the technical field of gravity energy storage, and particularly relates to a multi-track parallel gravity energy storage heavy object stacking system, which aims to solve the problems of low electric-electric conversion efficiency, high construction cost and insufficient system safety of the existing solid gravity energy storage system caused by stacking. The present application comprises an upper parking track, a lower parking track, a communication track, a track lifting device and energy storage heavy objects; the two ends of the communication track are respectively communicated with the upper parking track and the lower parking track; the track lifting device is connected with one end of the upper parking track away from the communication track; the track lifting device is connected with one end of the lower parking track away from the communication track. The present application drives the parking track to swing through the track lifting device to form a slope, so that the energy storage heavy objects can be moved only by gravity, without the need to set a stacking machine, avoiding the stacking of heavy objects, improving the safety, avoiding the risk of collapse, reducing the energy consumption of stacking, and improving the electric-electric conversion efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gravity energy storage, and particularly relates to a multi-track parallel gravity energy storage heavy object stacking system. BACKGROUND

[0002] At present, the power consumption load in the power grid changes in real time and the peak-valley difference is large, in order to ensure the utilization rate level of energy, various forms of energy storage systems are added to the power grid to carry out peak clipping and valley filling and electric energy storage, among which, the development of gravity energy storage system is particularly rapid.

[0003] At present, the most developed and widely used form of gravity energy storage is pumped storage, and solid gravity energy storage has also developed rapidly in recent years. In the current field, there are many studies on the energy storage and release process of energy storage systems, but there are few studies on the stacking system of heavy objects. There is no reliable and feasible stacking technology, and the stacking technology proposed in a few patents has problems such as complex structure, low efficiency, high construction cost, and great difficulty. The invention patent CN114922787A discloses a gravity energy storage system operation method for mountainous areas. This method uses high and low platform spiral tracks and inclined tracks to form a closed track, and the energy storage heavy objects enter the spiral track and queue themselves and operate according to the principle of first-in first-out. However, the heavy objects in this method still need to be driven by a power system during the energy storage and release process, i.e. an additional power system is needed to provide driving force for the stacking and sending of heavy objects, which will increase the construction and operation cost of the energy storage system. The invention patent CN111980874A discloses a gravity energy storage technology along the track uphill and downhill. This technology uses a power device to cooperate with the heavy objects, and the motor at both ends of the U-shaped port drags the single heavy object to move back and forth for energy storage and release. This technology does not have a heavy object storage yard, and does not need to consider the stacking of heavy objects, but the number of heavy objects is limited, the energy storage capacity is small, and the capacity is greatly limited. Due to the small energy storage capacity, the investment cost of electromechanical and track accounts for a high proportion, resulting in high degree of electric cost and poor economic efficiency, which cannot be popularized and applied. The stacking technology of heavy objects in the energy storage system disclosed in the invention patent CN103867408A, the invention patent CN115653856A and the invention patent CN115681035A is realized by a stacking machine. This technology uses upper and lower storage yards to greatly expand the number of heavy object carriers, thereby solving the problem of system energy storage capacity. However, the stacking machine vertically stacks and moves the heavy objects, which needs to be driven by electric energy, causing the loss of electric-electric efficiency due to the large difference in stacking height. Moreover, the vertical stacking of heavy objects is prone to collapse, causing safety accidents and high safety risks. In addition, the loading and unloading system of the stacking machine is complex and has high cost, resulting in increased system cost and high operation and maintenance cost. Therefore, the technology scheme of using a stacking machine in the storage yard leads to low economic efficiency, safety hazards and high operation and maintenance cost.

[0004] That is, the existing solid gravity energy storage system has problems such as low electric-electric conversion efficiency, high construction cost and insufficient system safety due to stacking. SUMMARY

[0005] The purpose of the present application is to provide a multi-track parallel gravity energy storage heavy object stacking system to solve the problems of low electric-electric conversion efficiency, high construction cost and insufficient system safety of the existing solid gravity energy storage system due to stacking.

[0006] To solve the above technical problems, the technical scheme provided by the present application is characterized in that:

[0007] A multi-track parallel gravity energy storage heavy object stacking system comprises an upper parking track, a lower parking track, a communication track, a track lifting device and an energy storage heavy object. The two ends of the communication track are respectively communicated with the upper parking track and the lower parking track. The track lifting device is connected with one end of the upper parking track away from the communication track to drive the one end of the upper parking track away from the communication track to lift. The track lifting device is connected with one end of the lower parking track away from the communication track to drive the one end of the lower parking track away from the communication track to lift. The energy storage heavy object can move between the upper parking track, the communication track and the lower parking track to change its own gravitational potential energy.

[0008] Further, the multi-track parallel gravity energy storage heavy object stacking system further comprises an upper stacking platform and a lower stacking platform. The lower end of the track lifting device is connected with the upper stacking platform, and the upper end is connected with the upper parking track. The lower end of the track lifting device is connected with the lower stacking platform, and the upper end is connected with the lower parking track.

[0009] Further, the multi-track parallel gravity energy storage heavy object stacking system further comprises a limiting control device. The limiting control device is arranged at one end of the upper parking track connected with the communication track to control the entry and exit of the energy storage heavy object. The limiting control device is arranged at one end of the lower parking track connected with the communication track to control the entry and exit of the energy storage heavy object.

[0010] Further, the communication track comprises a conveyor belt, and a scraper is arranged on the conveyor belt. The scraper abuts against the energy storage heavy object to make the conveyor belt drive the energy storage heavy object to move or make the energy storage heavy object drive the conveyor belt to move.

[0011] Further, the communication track comprises a first transmission roller and a second transmission roller. The first transmission roller and the second transmission roller are installed at both ends of the conveyor belt and can rotate around their own axes.

[0012] Further, the communication track further comprises a generator and a driving motor. The generator is connected with the first transmission roller through a clutch, and the driving motor is connected with the second transmission roller through a clutch.

[0013] Further, the multi-track parallel gravity energy storage heavy object stacking system comprises a plurality of upper parking tracks and a blocking device. The plurality of upper parking tracks converge at a point with the communication track. The blocking device is arranged at the convergence point of the upper parking track and the communication track to block the energy storage heavy object to make the energy storage heavy object enter different upper parking tracks.

[0014] Further, the multi-track parallel gravity energy storage weight stacking system comprises a plurality of lower parking tracks and a blocking device, the plurality of lower parking tracks intersect with the communication track at a point; the blocking device is arranged at the intersection of the lower parking track and the communication track, and is used for blocking the energy storage weight to make the energy storage weight enter different lower parking tracks.

[0015] Further, the blocking device is arranged as a swing baffle, and the swing baffle swings to guide the energy storage weight to enter the upper parking track or the lower parking track.

[0016] In some embodiments, the multi-track parallel gravity energy storage weight stacking system comprises a plurality of upper parking tracks and a plurality of lower parking tracks, and further comprises a track switching device, the track switching device comprising a rotating disc and a swing track; one end of the swing track is connected with the rotating disc, and the other end is connected with the upper parking track or the lower parking track; the rotating disc is connected with the communication track and can rotate around its own axis to drive the swing track to swing.

[0017] In combination with the above technical solutions, the technical effects that can be achieved by the present application are as follows:

[0018] The multi-track parallel gravity energy storage weight stacking system provided by the present application comprises an upper parking track, a lower parking track, a communication track, a track lifting device and an energy storage weight; two ends of the communication track are respectively communicated with the upper parking track and the lower parking track; the track lifting device is connected with one end of the upper parking track away from the communication track, and is used to lift one end of the upper parking track away from the communication track; the track lifting device is connected with one end of the lower parking track away from the communication track, and is used to lift one end of the lower parking track away from the communication track; the energy storage weight can move between the upper parking track, the communication track and the lower parking track to change its gravitational potential energy.

[0019] The multi-track parallel gravity energy storage weight stacking system provided by the present application uses the track lifting device to drive the parking track to swing, so that the parking track can have an inclined state or a horizontal state. Before the energy storage weight enters the parking track, the track lifting device lowers one end of the parking track away from the communication track, so that the energy storage weight enters the parking track under the action of gravity; before the energy storage weight leaves the parking track, the track lifting device raises one end of the parking track away from the communication track, so that the energy storage weight leaves the parking track under the action of gravity and enters the communication track; when the energy storage weight is stored, the track lifting device makes the parking track in a horizontal state, so that the energy storage weight can be stably stored.

[0020] The present application enables the energy storage weight to move on the upper parking track or the lower parking track without relying on additional power, only by gravity, without the need for additional stacker, and without the need for setting power on the energy storage device for walking, greatly simplifying the structure, reducing the cost, and improving the reliability. The energy storage weight is arranged along the length direction of the track, avoiding the stacking of the weight in the height direction, improving the safety, avoiding the risk of collapse, reducing the energy consumption when stacking, and improving the electric-electric conversion efficiency. In addition, the release speed of the energy storage weight can be adjusted by adjusting the inclination angle of the parking track, so as to match the energy storage or energy release demand, and improve the flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 A schematic diagram of the multi-track parallel gravity energy storage weight stacking system provided by the embodiment of the present application is shown in the figure.

[0023] Figure 2 A top view schematic diagram of the multi-track parallel gravity energy storage weight stacking system provided by the embodiment of the present application is shown in the figure.

[0024] Figure 3 A schematic diagram of the energy storage weight entering the parking track is shown in the figure.

[0025] Figure 4 A schematic diagram of the energy storage weight leaving the parking track is shown in the figure.

[0026] Figure 5 Another schematic diagram of the multi-track parallel gravity energy storage weight stacking system provided by the embodiment of the present application is shown in the figure.

[0027] Figure 6 A structural schematic diagram of the conveying belt is shown in the figure.

[0028] Figure legend: 100-upper parking track; 200-lower parking track; 300-communication track; 400-track lifting device; 500-energy storage weight; 600-upper stacking platform; 700-lower stacking platform; 800-limiting control device; 900-track switching device; 1000-track support device; 810-rotating disc; 820-swinging track; 311-conveying belt; 312-first transmission roller; 313-second transmission roller; 311a-scraper; a-mountain. DETAILED DESCRIPTION

[0029] So that the purposes, technical solutions and advantages of the embodiments of the present application are more apparent, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0031] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] The existing solid gravity energy storage system has problems of low electric-electric conversion efficiency, high construction cost, insufficient system safety and the like due to stacking.

[0033] Therefore, the present application provides a multi-track parallel gravity energy storage heavy object stacking system, which comprises an upper parking track 100, a lower parking track 200, a communication track 300, a track lifting device 400 and an energy storage heavy object 500. The two ends of the communication track 300 are respectively communicated with the upper parking track 100 and the lower parking track 200. The track lifting device 400 is connected with one end of the upper parking track 100 away from the communication track 300, so as to drive the one end of the upper parking track 100 away from the communication track 300 to lift. The track lifting device 400 is connected with one end of the lower parking track 200 away from the communication track 300, so as to drive the one end of the lower parking track 200 away from the communication track 300 to lift. The energy storage heavy object 500 can move between the upper parking track 100, the communication track 300 and the lower parking track 200 to change its own gravitational potential energy.

[0034] The multi-track parallel gravity energy storage heavy object stacking system provided by the application can have an inclined state or a horizontal state by using the track lifting device 400 to drive the parking track to swing. Before the energy storage heavy object 500 enters the parking track, the track lifting device 400 lowers the end of the parking track away from the communication track 300, so that the energy storage heavy object 500 enters the parking track under the action of gravity; before the energy storage heavy object 500 leaves the parking track, the track lifting device 400 raises the end of the parking track away from the communication track 300, so that the energy storage heavy object 500 leaves the parking track under the action of gravity and enters the communication track 300; when storing the heavy object, the track lifting device 400 makes the parking track in a horizontal state, so that the energy storage heavy object 500 can be stably stored.

[0035] The application makes the energy storage heavy object 500 move on the upper parking track 100 or the lower parking track 200 without relying on additional power through a small amplitude swing of the parking track in the vertical plane, and only through gravity, without the need for additional setting of a stacking machine, and without the need for setting power on the energy storage device for walking, greatly simplifying the structure, reducing the cost, and improving the reliability. The energy storage heavy object 500 is arranged along the length direction of the track, avoiding the stacking of the heavy object in the height direction, improving the safety, avoiding the risk of collapse, reducing the energy consumption when stacking, and improving the electric-electric conversion efficiency. In addition, the release speed of the energy storage heavy object 500 can be adjusted by adjusting the inclination angle of the parking track, so as to match the energy storage or energy release demand, and improve the flexibility.

[0036] The following will be described in detail Figures 1-6 The structure and shape of the multi-track parallel gravity energy storage heavy object stacking system provided by the embodiment will be described in detail:

[0037] In an optional scheme of the embodiment, the multi-track parallel gravity energy storage heavy object stacking system is built on the mountain body a, and further comprises an upper stacking platform 600, a lower stacking platform 700 and a track support device 1000, the upper stacking platform 600 is higher in altitude than the lower stacking platform 700. As shown in Figure 1 、 Figure 3 、 Figure 4As shown, one end of the upper parking track 100 is hinged to the track support device 1000, and the other end is connected to the track lifting device 400. Specifically, the lower end of the track lifting device 400 is connected to the upper stacking platform 600, and the upper end is connected to the upper parking track 100. Similarly, one end of the lower parking track 200 is hinged to the track support device 1000, and the other end is connected to the track lifting device 400. Specifically, the lower end of the track lifting device 400 is connected to the lower stacking platform 700, and the upper end is connected to the lower parking track 200. The track support device 1000 and the track lifting device 400 lift the parking track and make it swing in the vertical plane, so that the end of the parking track away from the communication track 300 can be lifted and lowered to form a slope, facilitating the movement of the energy storage heavy object 500 along the parking track under the action of gravity.

[0038] When the energy is released, the track lifting device 400 swings the upper parking track 100 upward, so that the energy storage heavy object 500 enters the communication track 300 from the upper parking track 100 under the action of gravity, as shown in Figure 3 At the same time, the track lifting device 400 swings the lower parking track 200 downward, so that the energy storage heavy object 500 enters the lower parking track 200 from the communication track 300 under the action of gravity and moves along the lower parking track 200. When the energy is stored, the track lifting device 400 swings the upper parking track 100 upward, as shown in Figure 4 so that the energy storage heavy object 500 enters the communication track 300 from the lower parking track 200 under the action of gravity and is transported to the upper parking track 100 from the communication track 300. At the same time, the track lifting device 400 swings the upper parking track 100 downward, so that the energy storage heavy object 500 moves along the lower parking track 200 and the upper parking track 100 under the action of gravity.

[0039] In an optional embodiment of the present embodiment, the communication track 300 includes a conveyor belt 311, a first transmission roller 312, a second transmission roller 313, a drive motor and a generator. As shown in Figure 6As shown, the conveying belt 311 is provided with a scraper 311a abutting against the energy storage device, so as to drive the energy storage weight 500 or make the weight drive the scraper 311a to drive the conveying belt 311 to move; the first transmission roller 312 and the second transmission roller 313 are located at two ends of the conveying belt 311, for tensioning the conveying belt 311 and transmitting power with the conveying belt 311. The driving motor is connected with the first transmission roller 312 through a clutch, and the generator is connected with the second transmission roller 313 through a clutch. When the energy storage weight 500 moves upward, the driving motor is connected with the first transmission roller 312 to drive the conveying belt 311, and the generator is disconnected with the second transmission roller 313, so that the conveying belt 311 drives the energy storage weight 500 to move upward to the parking track 100; when the energy storage weight 500 moves downward, the driving motor is disconnected with the first transmission roller 312, and the generator is connected with the second transmission roller 313, so that the energy storage weight 500 drives the conveying belt 311 under the action of gravity, and then the conveying belt 311 drives the second transmission roller 313 to rotate, and finally drives the generator to generate electricity, so that the energy storage weight 500 moves downward to the parking track 200 under the action of gravity.

[0040] In addition, the form of the communication track 300 includes but is not limited to belt drive, chain drive, cable drive and the like, and the driving power of the communication track 300 can also use a motor / generator set, the shaft of which is connected with the track transmission system to transmit power. Specifically, the shaft of the motor / generator set is connected with the first transmission roller 312 or the second transmission roller 313, so that the clutch is no longer needed to switch.

[0041] In addition, the form of the communication track 300 includes but is not limited to belt drive, chain drive, cable drive and the like, and the driving power of the communication track 300 can also use a motor / generator set, the shaft of which is connected with the track transmission system to transmit power. Specifically, the shaft of the motor / generator set is connected with the first transmission roller 312 or the second transmission roller 313, so that the clutch is no longer needed to switch.

[0042] In the optional scheme of the embodiment, the multi-track parallel gravity energy storage weight stacking system further includes a limiting control device 800, such as Figure 1 、 Figure 2As shown, the limiting control device 800 is arranged at one end of the upper parking track 100 connected with the communication track 300, for controlling the entry and exit of the energy storage weight 500; the limiting control device 800 is arranged at one end of the lower parking track 200 connected with the communication track 300, for controlling the entry and exit of the energy storage weight 500. Specifically, the limiting control device 800 can adopt the structure of electromagnetic adsorption plus mechanical baffle, when the energy storage weight 500 moves to the limiting control device 800, it is first braked by electromagnetic adsorption, and after stopping, the mechanical baffle is swung down to block the movement of the energy storage weight 500, and it can prevent the electromagnetic adsorption from failing due to power failure. When releasing the energy storage weight 500, the mechanical baffle is opened to make the first energy storage weight 500 enter the communication track 300 under the action of gravity, and the next energy storage weight 500 is fixed by electromagnetic adsorption, thereby preventing continuous release of the energy storage weight 500 from causing interruption, and ensuring that the energy storage weight 500 enters the communication track 300 one by one. That is, the continuously arranged energy storage weights 500 can be released individually by electromagnetic adsorption and mechanical baffle, the energy release can be flexibly controlled, and the energy storage weight 500 can be corresponded to the scraper 311a one by one, avoiding that a single scraper 311a bears the weight of multiple energy storage weights 500.

[0043] In the storage state, the track lifting device 400 makes the parking track horizontal, so as to reduce the load on the limiting control device 800 and make the energy storage weight 500 stably stored.

[0044] In an optional scheme of the embodiment, in order to increase the energy storage capacity, the multi-track parallel gravity energy storage weight stacking system includes multiple upper parking tracks 100, corresponding multiple lower parking tracks 200 and a blocking device. As shown, Figure 2 As shown, the multiple upper parking tracks 100 and the communication track 300 meet at one point, the blocking device is arranged at the meeting point of the upper parking track 100 and the communication track 300, for blocking the energy storage weight 500 to make the energy storage weight 500 enter different upper parking tracks 100; similarly, the multiple lower parking tracks 200 and the communication track 300 meet at one point, the blocking device is arranged at the meeting point of the lower parking track 200 and the communication track 300, for blocking the energy storage weight 500 to make the energy storage weight 500 enter different lower parking tracks 200, so as to switch the tracks in time according to the storage conditions of each upper parking track 100 and lower parking track 200, avoiding that the energy storage weight 500 still enters when there is no storage space in one track.

[0045] Specifically, the blocking device is arranged as a swing baffle, which swings to guide the energy storage weight 500 to enter different upper parking tracks 100 or lower parking tracks 200. Alternatively, the meeting point can also be arranged as a turnout and a switch machine for making the communication track 300 communicate with different upper parking tracks 100 or lower parking tracks 200.

[0046] In an optional solution of the embodiment, the multi-track parallel gravity energy storage weight stacking system comprises a plurality of upper parking tracks 100 and a plurality of lower parking tracks 200, and further comprises a track switching device 900, as shown in the figure. Figure 5 The track switching device 900 comprises a rotating disc 810 and a swing track 820; one end of the swing track 820 is connected with the rotating disc 810, and the other end is connected with the upper parking track 100 or the lower parking track 200; the rotating disc 810 is connected with the communication track 300 and can rotate around its own axis to drive the swing track 820 to swing, so as to make the communication track 300 communicate with different upper parking tracks 100 or lower parking tracks 200. The swing track 820 has the same structure as the communication track 300, comprising a conveyor belt 311, a first transmission roller 312, a second transmission roller 313, a driving motor and a generator, and the specific structure is not described again. The energy storage weight 500 can enter the swing track 820 by relying on inertia in the process of entering the upper parking track 100 upward, and can rely on gravity downward.

[0047] The working process of the multi-track parallel gravity energy storage weight stacking system provided by the embodiment is as follows:

[0048] During energy storage, the track lifting device 400 lifts the lower parking track 200, so that the energy storage weight 500 enters the communication track 300 from the lower parking track 200 under the action of gravity, and enters the upper parking track 100 under the drive of the conveyor belt 311, at the same time, the track lifting device 400 makes the upper parking track 100 fall, and finally the energy storage weight 500 entering the upper parking track 100 under the action of gravity slides along the upper parking track 100 and is arranged in turn, at this time, the electric energy is converted into gravitational potential energy.

[0049] During energy release, the track lifting device 400 lifts the upper parking track 100, so that the energy storage weight 500 enters the communication track 300 from the upper parking track 100 under the action of gravity and drives the conveyor belt 311 to rotate, at the same time, the track lifting device 400 makes the lower parking track 200 fall, and finally the energy storage weight 500 entering the lower parking track 200 under the action of gravity slides along the lower parking track 200 and is arranged in turn, at this time, the gravitational potential energy is converted into electric energy.

[0050] The weight stacking system for gravity energy storage provided by the embodiment considers comprehensive efficiency, construction cost, safety stability and economy. When stacking the weight, no stacking machine is needed, and no additional lifting and stacking is needed, the energy storage weight 500 is arranged in turn along the length direction of the track by adjusting the angle of the parking track itself, which greatly reduces the energy loss and reduces the problem of transportation efficiency in the process of lifting the weight. And because of less additional mechanical equipment, the weight does not need to be stacked and lifted frequently, so the safety is high, the maintainability is good, and the operation cost is low.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-rail parallel gravitational energy storage weight stacking system characterized by, The device comprises an upper parking track (100), a lower parking track (200), a communication track (300), a track lifting device (400) and an energy storage weight (500); Two ends of the communication track (300) are respectively communicated with the upper parking track (100) and the lower parking track (200); The track lifting device (400) is connected with one end of the upper parking track (100) away from the communication track (300), so as to drive the one end of the upper parking track (100) away from the communication track (300) to lift; The track lifting device (400) is connected with one end of the lower parking track (200) away from the communication track (300), so as to drive the one end of the lower parking track (200) away from the communication track (300) to lift; The energy storage weight (500) can move between the upper parking track (100), the communication track (300) and the lower parking track (200) to change its gravitational potential energy; The communication track (300) comprises a conveyor belt (311), and a scraper (311a) is arranged on the conveyor belt (311), the scraper (311a) abuts against the energy storage weight (500), so that the conveyor belt (311) drives the energy storage weight (500) to move or the energy storage weight (500) drives the conveyor belt (311) to move; The communication track (300) comprises a first transmission roller (312) and a second transmission roller (313); The first transmission roller (312) and the second transmission roller (313) are installed at two ends of the conveyor belt (311) and can rotate around their own axes; Further comprising a generator and a driving motor; The generator is connected with the first transmission roller (312) through a clutch, and the driving motor is connected with the second transmission roller (313) through a clutch; A plurality of the upper parking tracks (100) and a blocking device are comprised, and the plurality of the upper parking tracks (100) meet the communication track (300) at a point; The blocking device is arranged at the meeting point of the upper parking track (100) and the communication track (300), and is used for blocking the energy storage weight (500) to make the energy storage weight (500) enter different upper parking tracks (100); A plurality of the lower parking tracks (200) and the blocking device are comprised, and the plurality of the lower parking tracks (200) meet the communication track (300) at a point; The blocking device is arranged at the meeting point of the lower parking track (200) and the communication track (300), and is used for blocking the energy storage weight (500) to make the energy storage weight (500) enter different lower parking tracks (200); Further comprising a track switching device (900), and the track switching device (900) comprises a rotating disc (810) and a swing track (820); One end of the swing track (820) is connected with the rotating disc (810), and the other end is connected with the upper parking track (100) or the lower parking track (200); The rotating disc (810) is connected with the communication track (300) and can rotate around its axis to drive the swing track (820) to swing.

2. The multi-rail, parallel, gravitational potential energy weight stacking system of claim 1, wherein, The upper stacking platform (600) and the lower stacking platform (700) are further included. The lower end of the track lifting device (400) is connected with the upper stacking platform (600), and the upper end is connected with the upper parking track (100). The lower end of the track lifting device (400) is connected with the lower stacking platform (700), and the upper end is connected with the lower parking track (200).

3. The multi-rail, parallel, gravitational potential energy weight stacking system of claim 2, wherein, The limiting control device (800) is arranged at one end of the upper parking track (100) connected with the communication track (300) to control the entry and exit of the energy storage weight (500). The limiting control device (800) is arranged at one end of the lower parking track (200) connected with the communication track (300) to control the entry and exit of the energy storage weight (500).

4. The multi-rail, parallel, gravitational potential energy weight stacking system of claim 3, wherein, The blocking device is arranged as a swing baffle, which swings to guide the energy storage weight (500) to enter the upper parking track (100) or the lower parking track (200).

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