A modular gravity energy storage system

Abstract

The present invention discloses a modular gravity energy storage system, including multiple mass blocks, mass blocks, automatic telescopic slings, slings, and automatic telescopic load-bearing devices, characterized in that: the multiple mass blocks are stacked in a vertical direction and each mass block layer is provided with an automatic telescopic storage position, each layer can support and accommodate the mass blocks through the automatic telescopic storage position, the mass blocks are provided with through holes, which are convenient for the automatic telescopic sling to pass through to achieve lifting and release, and the sling can pass through multiple mass blocks to achieve simultaneous lifting or release of multiple mass blocks. The present invention can accommodate multiple mass blocks, with high utilization rate of floor space; it is easy to control, without the need for elevator devices and horizontal transportation devices, and reduces energy loss; it can form an abandoned mine gravity energy storage system or a building frame gravity energy storage system, with high stability and a wide range of applications; it can realize dynamic adjustment of grid energy storage and discharge power by controlling the number of lifted and released mass blocks.

Description

Technical Field

[0001] The invention relates to the technical field of gravity energy storage, and in particular to a modular gravity energy storage system. Background Art

[0002] The grid connection and absorption problems caused by the intermittency and volatility of renewable energy such as wind energy and solar energy have become one of the difficulties in building a new power system. The energy storage system can play a variety of functions in the operation of the power system, such as peak regulation, frequency regulation, voltage regulation, standby, black start, inertia response, etc., and is an important supporting technology for building a new power system.

[0003] Energy Vault of Switzerland proposed a structure that uses a crane to stack concrete blocks into a tower, which uses the lifting and dropping of blocks to store and release energy. However, the crane needs a high-load, high-precision mechanical gripper to lift the blocks, which is difficult to manufacture, and there are problems such as cable shaking and difficulty in positioning, and low tower stability, which limits its promotion and application.

[0004] Energy Vault has turned from high towers to 20-story modular buildings (EVRC) for gravity energy storage. 30 tons of bricks are lifted from a low place to a height of 120 meters through a lifting frame similar to an elevator, and the electrical energy is converted into gravitational potential energy and stored; when the power grid needs electricity, the bricks are controlled to descend from a high place, and the gravitational potential energy is converted into kinetic energy, which drives the generator to generate electricity and transmit the electricity back to the power grid. However, the elevator can only lift or lower a fixed weight block each time. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a modular gravity energy storage system with small footprint, high space utilization, simple control and the ability to achieve dynamic adjustment of discharge power.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows: A modular gravity energy storage system includes multiple layers of mass blocks, mass blocks, automatic telescopic slings, slings, and automatic telescopic load-bearing devices, and is characterized in that the multiple layers of mass blocks are stacked in a vertical direction and each layer of mass blocks is provided with an automatic telescopic load-bearing device, each layer can support and accommodate the mass blocks through the automatic telescopic load-bearing device, the mass blocks are provided with through holes to facilitate the automatic telescopic sling to pass through for lifting and releasing, the sling can pass through multiple mass blocks to simultaneously lift or release multiple mass blocks, convert electrical energy into gravitational potential energy when lifting, and convert the gravitational potential energy of the mass blocks into electrical energy when releasing.

[0007] Furthermore, the bottom of the multi-layer mass block layer is provided with an automatic telescopic load-bearing device, such as Figure 1 shown.

[0008] Furthermore, the mass block has a countersunk hole at the bottom and a chamfer at the top, such as Figure 2 shown.

[0009] Furthermore, the automatic telescopic load-bearing device can adopt various mechanisms such as an aperture mechanism, a telescopic load-bearing beam, etc. to support the mass block, such as Figure 1 and Figure 3 shown.

[0010] Furthermore, the modular gravity energy storage system can constitute an abandoned mine gravity energy storage system or a frame gravity energy storage system, such as Figure 4 and Figure 5 shown.

[0011] Compared with the prior art, the present invention has the following advantages and effects: 1. A vertical unit of the present invention can accommodate multiple layers of mass blocks, and the utilization rate of floor space is high; 2. The present invention can form an abandoned mine gravity energy storage system or a building frame gravity energy storage system, which has high stability and a wide range of applications; 3. The present invention does not require an elevator device and a horizontal transportation device, thus reducing energy loss; 4. The present invention can realize dynamic adjustment of energy storage and discharge power by controlling the number of lifted and released mass blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a longitudinal unit of a modular gravity energy storage system of the present invention.

[0013] Figure 2 Schematic diagram of the mass block of the present invention.

[0014] Figure 3 It is a schematic diagram of the automatic telescopic load-bearing device of the present invention.

[0015] Figure 4 It is a schematic diagram of the frame type gravity energy storage system of the present invention.

[0016] Figure 5 It is a schematic diagram of the abandoned mine gravity energy storage system of the present invention.

[0017] Figure 6 , Figure 7 , Figure 8 A schematic diagram of a workflow of the present invention.

[0018] Marking instructions: 1-mass block; 2-automatic telescopic sling; 3-sling; 4-automatic telescopic load-bearing device; 5-mass block layer; 6-earth. DETAILED DESCRIPTION

[0019] In order to elaborate on the technical scheme adopted by the present invention to achieve the predetermined technical purpose, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only partial embodiments of the present invention, not all embodiments, and the technical means or technical features in some embodiments of the present invention can be replaced without paying creative labor. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0020] Figure 1 It is a schematic diagram of a longitudinal unit of a modular gravity energy storage system of the present invention. As shown in the figure, a modular gravity energy storage system includes multiple layers of mass block layers, mass blocks, automatic telescopic slings, slings, and automatic telescopic load-bearing devices, characterized in that: the multiple layers of mass block layers 5 are stacked in a vertical direction and each layer of mass block layers 5 is provided with an automatic telescopic load-bearing device 4, each layer can support and accommodate mass blocks 1 through the automatic telescopic load-bearing device 4, the mass blocks 1 are provided with through holes to facilitate the automatic telescopic slings 2 to pass through for lifting and releasing, the slings can pass through multiple mass blocks 1 to simultaneously lift or release multiple mass blocks 1, convert electrical energy into gravitational potential energy when lifting, and convert the gravitational potential energy of the mass blocks 1 into electrical energy when releasing.

[0021] Figure 2 This is a schematic diagram of the mass block of the present invention. As shown in the figure, the mass block 1 is provided with a through hole to facilitate the passage of the automatic telescopic spreader 2. The upper part of the through hole is provided with a chamfer to facilitate the positioning and correct entry of the automatic telescopic spreader 2 into the through hole. The lower part of the through hole is provided with a countersunk hole to facilitate the opening of the automatic telescopic spreader 2.

[0022] Figure 3 This is a schematic diagram of the automatic telescopic load-bearing device of the present invention. As shown in the figure, the automatic telescopic load-bearing device 4 can adopt various mechanisms such as an aperture mechanism, a telescopic load-bearing beam, etc. to support the mass block. When the automatic telescopic load-bearing device 4 is opened, the mass block 1, the automatic telescopic sling 2 and the sling 3 can pass freely; when the automatic telescopic load-bearing device 4 is closed, only the automatic telescopic sling 2 and the sling 3 can pass, and the mass block 1 is placed on the automatic telescopic load-bearing device 4.

[0023] Figure 4 This is a schematic diagram of the frame type gravity energy storage system of the present invention. As shown in the figure, multiple Figure 1 The longitudinal units of a modular gravity energy storage system shown in the figure can be arranged horizontally into Figure 4 The frame-type gravity energy storage system is a combined application of the present invention on the ground, wherein the mass block layers 5 can be stacked in the vertical direction and each mass block layer 5 is provided with an automatic telescopic load-bearing device 4, and each layer can support and accommodate the mass block 1 through the automatic telescopic load-bearing device 4. This expansion combination in the horizontal and vertical directions can greatly increase the energy storage capacity.

[0024] Figure 5 This is a schematic diagram of the abandoned mine gravity energy storage system of the present invention. As shown in the figure, the abandoned mine can be transformed into a gravity energy storage device, which is an application of the present invention underground. The mass block layer 5 is close to the ground, and the layout can be completed by transforming the shallower part of the abandoned mine.

[0025] Figure 6 , Figure 7 , Figure 8 A schematic diagram of a workflow of the present invention.

[0026] like Figure 6 As shown, the sling 3 is connected to the motor, and the automatic telescopic sling 2 and the sling 3 descend, wherein the automatic telescopic sling 2 is in a retracted state, and descends to the countersunk hole of the second mass block 1. The automatic telescopic sling 2 opens, and the motor drives the sling 3 to pull the two mass blocks 1 up by the automatic telescopic sling 2. During this process, the three automatic telescopic load-bearing devices 4 from top to bottom are always in an open state. When the two mass blocks 1 are just lifted to the second automatic telescopic load-bearing device 4, the second automatic telescopic load-bearing device 4 shrinks, and the automatic telescopic sling 2 shrinks, and the second mass block 1 from top to bottom is placed on the second automatic telescopic load-bearing device 4, and then the automatic telescopic sling 2 rises to the countersunk hole of the first mass block 1 and opens, and continues to lift the first mass block 1 to the first automatic telescopic load-bearing device 4, the first automatic telescopic load-bearing device 4 shrinks, and the automatic telescopic sling 2 shrinks, and the first mass block 1 is placed on the first automatic telescopic load-bearing device 4, thereby completing a one-way energy storage of two mass blocks.

[0027] like Figure 7 As shown, the automatic telescopic spreader 2 and the sling 3 descend, wherein the automatic telescopic spreader 2 is in a retracted state, and the automatic telescopic spreader 2 opens when it descends to the countersunk hole of the third mass block 1, and the motor drives the sling 3 to pull the third mass block 1 up by the automatic telescopic spreader 2. During this process, the first and second automatic telescopic load-bearing devices 4 from top to bottom are always in a retracted state, and the third automatic telescopic load-bearing device 4 is in an open state. When the third mass block 1 is just lifted to the third automatic telescopic load-bearing device 4, the third automatic telescopic load-bearing device 4 contracts, and the automatic telescopic spreader 2 contracts to place the third mass block 1 on the third automatic telescopic load-bearing device 4, thereby completing the energy storage of one mass block in a single trip.

[0028] like Figure 8As shown, the automatic telescopic sling 2 and the sling 3 move to the countersunk hole of the third mass block 1 and open, the automatic telescopic load-bearing device 4 opens, and the weight of the mass block 1 pulls the automatic telescopic sling 2 and the sling 3 down, thereby driving the generator to generate electricity. Similarly, the automatic telescopic sling 2 moves to the countersunk hole of the second mass block 1 and opens, the first and second automatic telescopic load-bearing devices 4 open, and the weight of the two mass blocks 1 pulls the automatic telescopic sling 2 and the sling 3 down, thereby driving the generator to output more power than releasing a single mass block 1.

[0029] In addition to using the aperture mechanism as the automatic telescopic load-bearing device 4, the present invention can also be used for other automatic telescopic load-bearing devices with a structure matching the mass block 1 of the present invention to bear weight.

[0030] Obviously, the principle explanation of the above-mentioned embodiments of the present invention is only an example for clearly illustrating the present invention, and is not a limitation on the implementation mode of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above-mentioned description. Not all implementation forms are exhaustively listed here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

[0031] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A modular gravity energy storage system, characterized in that: It comprises a multi-layer mass block layer (5), a mass block (1), an automatic telescopic sling (2), a sling (3), and an automatic telescopic load-bearing device (4); The multi-layer mass block layers (5) are stacked in a vertical direction; The mass block layer (5) is provided with an automatic telescopic load-bearing device (4), and each layer can support and accommodate the mass block (1) through the automatic telescopic load-bearing device (4); The mass block (1) is provided with a through hole to allow the automatic telescopic sling (2) to pass through and perform a lifting or releasing operation; The automatic telescopic lifting device (2) is capable of passing through a plurality of mass blocks (1) to perform lifting or releasing actions simultaneously; The sling (3) is connected to the automatic telescopic sling (2) and is used to transmit power; when the mass block (1) is lifted, electrical energy is converted into gravitational potential energy; when the mass block (1) is lowered, the gravitational potential energy is converted into kinetic energy and then generates electrical energy.

2. The modular gravity energy storage system according to claim 1, characterized in that: An automatic telescopic load-bearing device (4) is also provided at the bottom of the mass block layer (5) and serves as an initial support platform.

3. The modular gravity energy storage system according to claim 1 or 2, characterized in that: In addition to using an aperture mechanism as the automatic telescopic load-bearing device (4), the automatic telescopic load-bearing device (4) can also be used for bearing loads in other automatic telescopic load-bearing devices having a structure matching that of the mass block (1) of the present invention.

4. The modular gravity energy storage system according to claim 1, characterized in that: The mass block (1) is designed with a countersunk hole at the bottom and a chamfered edge at the top to facilitate the positioning and correct entry of the automatic telescopic sling (2); The mass blocks (1) are multiple in number.

5. The modular gravity energy storage system according to claim 1, characterized in that: The upper part of the sling (3) is connected to a motor or a generator.

6. The modular gravity energy storage system according to claim 1, characterized in that: The energy storage and discharge power can be dynamically adjusted by controlling the number of lifted and released mass blocks (1).

7. The modular gravity energy storage system according to claim 1, characterized in that: The modular gravity energy storage system can constitute a frame-type gravity energy storage system or an abandoned mine gravity energy storage system.

8. The modular gravity energy storage system according to claim 7, characterized in that: The frame-type gravity energy storage system is a combined application of a modular gravity energy storage system of the present invention on the ground, wherein a plurality of modular gravity energy storage systems described in claim 1 form a frame-type building structure; The multiple mass block layers (5) of the frame-type gravity energy storage system are stacked in a vertical direction.

9. The modular gravity energy storage system according to claim 7, characterized in that: The abandoned mine gravity energy storage system is a combined application of a modular gravity energy storage system of the present invention underground, which can transform the abandoned mine into a gravity energy storage device; The mass block layer (5) of the abandoned mine gravity energy storage system is relatively close to the ground, and the arrangement can be completed by modifying a shallower part of the abandoned mine.

10. The frame type gravity energy storage system or abandoned mine gravity energy storage system according to claim 7, characterized in that: It consists of one or more modular gravity energy storage systems as described in claim 1.

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