Tower type gravity energy storage system using energy storage container as weight block

Abstract

The utility model relates to a tower type gravity energy storage system using an energy storage container as a weight block. The utility model is applicable to the technical field of energy storage equipment. According to the technical scheme, the tower type gravity energy storage system with the energy storage container as the weight block is provided with a door frame structure, an energy storage container and a weight block, the weight structure is arranged below the portal structure, the weight structure is provided with a frame, and an energy storage container can be placed in the frame; the connecting mechanism is arranged between the door frame structure and the weight structure, and the connecting mechanism can drive the weight structure to ascend and descend in the door frame structure; the driving mechanism is connected to the connecting mechanism, and the driving mechanism can drive the connecting mechanism to operate and drive the weight structure to move; the power generation mechanism is connected to the connecting mechanism, and the power generation mechanism can convert gravitational potential energy of the weight structure into electric energy when the weight structure descends; the controller, the driving mechanism and the power generation mechanism are all connected with the communication device, and the controller can control the driving mechanism and the power generation mechanism to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of tower type gravity energy storage systems with energy storage container as heavy block. BACKGROUND

[0002] The tower type gravity energy storage system adopts high tower structure, and the heavy block is lifted to the top of the tower for storage. When energy is needed, the heavy block is released and descends, and the kinetic energy is converted into electrical energy by the generator. The efficiency of this energy storage method depends mainly on the mass of the heavy block, the height, and the energy conversion process loss. In terms of storage capacity and output power, the capacity and power of the tower type gravity energy storage mainly depend on the mass of the heavy block and the height of the energy storage tower, and are greatly limited by technical conditions. Therefore, compared with other energy storage technologies, the average storage capacity is smaller, and the flexibility of output power is poorer. In terms of energy storage period, the tower type gravity energy storage is mainly suitable for short-term energy storage. During the low electricity consumption period, excess electricity is stored in the tower type gravity energy storage, and during the peak electricity consumption period, the electricity stored in the tower type gravity energy storage is released, which plays a good energy-saving role. With the increasing demand for tower type gravity energy storage, it is urgent to integrate energy storage technologies to improve the storage capacity and energy storage density, optimize the flexibility of output power, and extend the energy storage period. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a tower type gravity energy storage system with energy storage container as heavy block to solve the above technical problems.

[0004] The utility model adopts the technical scheme of a tower type gravity energy storage system with energy storage container as heavy block, which has:

[0005] Portal structure;

[0006] Heavy structure, arranged below the portal structure, the heavy structure has a frame, and the energy storage container can be placed in the frame;

[0007] Connecting mechanism, arranged between the portal structure and the heavy structure, the connecting mechanism can drive the heavy structure to move up and down in the portal structure;

[0008] Driving mechanism, connected to the connecting mechanism, the driving mechanism can drive the connecting mechanism to operate and move the heavy structure;

[0009] Generating mechanism, connected to the connecting mechanism, the generating mechanism can convert the gravitational potential energy of the heavy structure into electrical energy when the heavy structure descends;

[0010] Controller, the driving mechanism and the generating mechanism are connected in communication, and the controller can control the driving mechanism and the generating mechanism to operate.

[0011] The connecting mechanism has a winding shaft installed on the portal structure, a traction rope is wound on the winding shaft, and the end of the traction rope is connected to the frame through a pulley block above the weight structure.

[0012] The driving mechanism has a motor, the output shaft of the motor is connected with the winding shaft, and the motor can drive the winding shaft to rotate.

[0013] The power generation mechanism has a generator, the input shaft of the generator is connected with the winding shaft.

[0014] An adjusting mechanism is arranged on the portal structure, the adjusting mechanism has a first sliding rail installed on the portal structure, a first sliding block in sliding cooperation with the first sliding rail is installed on the first sliding rail, a second sliding rail arranged in a direction perpendicular to the length direction of the first sliding rail is installed on the first sliding block, a second sliding block in sliding cooperation with the second sliding rail is installed on the second sliding rail, and the pulley block is installed on the second sliding block.

[0015] The energy storage container has a battery compartment and a device compartment; the battery compartment is provided with a battery rack, the battery rack is provided with a battery cluster composed of battery cells, and the battery compartment is provided with a BMS control cabinet; the device compartment is provided with a converter PCS and an EMS control cabinet.

[0016] A monitoring camera is arranged in the battery compartment, the monitoring camera is in communication connection with the controller, the monitoring camera can obtain image information in the battery compartment and send the image information to the controller.

[0017] A fire extinguishing cabinet is arranged in the battery compartment.

[0018] Guide rails arranged in a vertical direction are arranged at both sides of the frame of the portal structure, guide shoes in sliding cooperation with the guide rails are arranged at the corresponding positions of the side walls of the frame, and safety clamps are arranged at the corresponding positions of the guide rails on the side walls of the frame.

[0019] Heat dissipation channels are arranged on the side walls of the frame.

[0020] The utility model discloses an advantageous effect is: the utility model discloses through setting up heavy structure in the portal structure, and make heavy structure connect on the portal structure through the lifting structure, facilitate in the low -power consumption period by the power drive drive mechanism operation drive connecting mechanism operation and make heavy structure rise to the corresponding position, realize the electric power conversion for the gravitational potential energy of heavy structure, when the high -power consumption period, heavy structure removes downward, drive the traction rope that winds on the winding shaft and drive generator rotor rotation and run, realize the gravitational potential energy of heavy structure conversion for electric energy, played good energy storage effect, the utility model discloses make drive mechanism, power generation mechanism all with control terminal communication connection, facilitate in the storage by control terminal control motor operation, generator stops, when discharging by control terminal control motor stop, generator operation, the utility model discloses through setting up energy storage container in heavy structure, expanded the application scene of energy storage container, increased the energy storage density of tower type gravitational energy storage system, improved the energy -saving effect of this tower type gravitational energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure schematic diagram of the embodiment one in the utility model.

[0022] Figure 2 The connection block diagram of the embodiment one in the utility model.

[0023] Figure 3 The structure schematic diagram of the embodiment two in the utility model.

[0024] Figure 4 The connection block diagram of the embodiment two in the utility model.

[0025] Figure 5 The structure schematic diagram of the energy storage container in the utility model.

[0026] Figure 6 The structure schematic diagram on the frame side wall in the utility model.

[0027] In the drawing: 1, portal structure, 1-1, guide rail, 2, frame, 2-1, guide shoe, 2-2, safety tongs, 2-3, heat dissipation channel, 3, energy storage container, 3-1, monitoring camera, 3-2, radiator, 3-3, battery rack, 3-4, battery cluster, 3-5, BMS control cabinet, 3-6, fire extinguishing cabinet, 3-7, converter PCS, 3-8, EMS control cabinet, 4, connecting mechanism, 4-1, pulley block, 4-2, traction rope, 4-3, winding shaft, 5, drive mechanism, 5-1, motor, 6, power generation mechanism, 6-1, generator, 7, adjusting mechanism, 7-1, first sliding rail, 7-2, first sliding block, 7-3, second sliding rail, 7-4, second sliding block, 8, controller. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail in combination with the drawings and by examples, the following examples are the explanation of the utility model and the utility model is not limited to the following examples.

[0029] Example one is a tower type gravity energy storage system taking the energy storage container 3 as a heavy block.

[0030] In this embodiment, the portal structure 1 has two support columns, and a cross beam is connected between the two support columns.

[0031] In this embodiment, a heavy structure is arranged in the portal structure 1, and the heavy structure is arranged below the cross beam. The heavy structure has a frame 2, and the energy storage container 3 can be placed on the frame 2. The energy storage container 3 has a battery compartment and a device compartment. A radiator 3-2 is arranged on the side wall of the battery compartment, a battery rack 3-3 is arranged in the battery compartment, and a battery cluster 3-4 composed of battery cells is arranged on the battery rack 3-3. The types of battery cells include but are not limited to lithium ion batteries, lead-carbon batteries, lead-acid batteries, etc. The battery rack 3-3 is used to fix the battery cluster 3-4 to avoid displacement and collision of the battery cluster 3-4 during lifting. The protection of the battery cluster 3-4 in the battery compartment adopts a combination of software and hardware, and the BMS control cabinet 3-5 realizes active control, combined with physical isolation of circuit breakers and fuses, to realize rapid breaking when short circuit or overcurrent fault occurs. The BMS control cabinet 3-5 is arranged in the battery compartment, and can monitor, manage and protect the battery cluster 3-4. Through the voltage, current and temperature sensors arranged in the battery compartment, the real-time data of the energy storage container 3 are collected and uploaded to the cloud, the effective monitoring and prediction of the state of the battery cells are realized, the battery cluster 3-4 is ensured to operate within the normal working range, and the battery performance is optimized and the battery life is prolonged. The device compartment is provided with a converter PCS 3-7 and an EMS control cabinet 3-8, the converter PCS 3-7 is used to control the charging and discharging process and the conversion of AC and DC, and the EMS control cabinet 3-8 is used to collect the real-time state of the battery and detect the change of load power in real time.

[0032] In this embodiment, a monitoring camera 3-1 is arranged in the battery compartment, and the monitoring camera 3-1 is in communication connection with the controller 8. The monitoring camera 3-1 can obtain image information in the battery compartment and send it to the controller 8. It is convenient to monitor the operating environment of the battery in the battery compartment. In this embodiment, a fire extinguishing cabinet 3-6 is arranged in the battery compartment, which is convenient for personnel to use the fire extinguishing tools in the fire extinguishing cabinet 3-6 to extinguish fire when the storage battery in the battery compartment is on fire.

[0033] In this embodiment, a heat dissipation channel 2-3 is arranged on the side wall of the frame 2. In this way, the heat generated during the operation of the energy storage container 3 in the frame 2 can be discharged in time, thereby reducing the probability of fire.

[0034] In the embodiment, guide rails 1-1 are arranged on both sides of the frame 2 in the vertical direction, and guide shoes 2-1 are arranged on the side walls of the frame 2 in corresponding positions of the guide rails 1-1. In this way, the guide rails 1-1 and the guide shoes 2-1 on the frame 2 guide the lifting of the heavy structure in the gantry structure 1.

[0035] Further, safety clamps 2-2 are arranged on the side walls of the frame 2 in corresponding positions of the guide rails 1-1, and the safety clamps 2-2 are in communication connection with the controller 8, which can control the safety clamps 2-2 to clamp the guide rails 1-1. In this way, when an accident occurs or the traction rope 4-2 is broken, the safety clamps 2-2 can clamp the guide rails 1-1, thereby avoiding the damage caused by the direct falling of the heavy structure.

[0036] In the embodiment, a connecting mechanism 4 is arranged between the heavy structure and the gantry structure 1, wherein the connecting mechanism 4 has a winding shaft 4-3 mounted on the gantry structure 1, a traction rope 4-2 wound on the winding shaft 4-3, and one end of the traction rope 4-2 connected to the frame 2 through a pulley block 4-1 above the heavy structure. The pulley block 4-1 has a plurality of movable pulleys and fixed pulleys, the movable pulleys are arranged on the frame 2, the fixed pulleys are mounted on the cross beam of the gantry structure 1, one end of the traction rope 4-2 is fixedly connected to the frame 2, and the other end of the traction rope 4-2 is alternately wound on the fixed pulleys on the cross beam and the movable pulleys on the frame 2 and then wound on the winding shaft 4-3. In the embodiment, the electric power is converted into the gravitational potential energy of the heavy structure by driving the driving mechanism 5 to drive the connecting mechanism 4 to move and make the heavy structure rise to the corresponding position during the off-peak period of electricity use; during the peak period of electricity use, the heavy structure moves downward, the traction rope 4-2 wound on the winding shaft 4-3 moves outward and drives the power generation mechanism 6 to operate, thereby converting the gravitational potential energy of the heavy structure into electric energy and achieving good energy storage effect. By arranging a plurality of movable pulleys on the frame 2, the stress on the frame 2 is more uniform during the lifting of the frame 2. In the embodiment, the driving mechanism 5 is an electric motor 5-1, and the power generation mechanism 6 is a generator 6-1.

[0037] The operation method of the embodiment is as follows:

[0038] During the off-peak period of electricity use, the controller 8 controls the energy storage container 3 to operate and store electricity, and the controller 8 controls the electric motor 5-1 to operate and controls the generator 6-1 to stop, at this time, the electric motor 5-1 drives the winding shaft 4-3 to rotate and wind the traction rope 4-2, and drives the frame 2 and the energy storage container 3 on the frame 2 to rise, and during the rising process, the electric energy is converted into the gravitational potential energy of the frame 2 and the energy storage container 3.

[0039] During the peak power consumption, the controller 8 controls the operation of the energy storage container 3 and the power supply by the energy storage container 3, and the controller 8 controls the motor 5-1 to be turned off and the generator 6-1 to be operated, at this time, the frame 2 and the energy storage container 3 on the frame 2 fall under the action of gravity, in the falling process, the traction rope 4-2 is pulled out from the winding shaft 4-3 and drives the winding shaft 4-3 to rotate, the rotation of the winding shaft 4-3 drives the input shaft of the generator 6-1 to rotate, thereby realizing the conversion of the gravitational potential energy of the frame 2 and the energy storage container 3 into electrical energy.

[0040] When the steel wire rope is broken, the safety clamp 2-2 can automatically clamp the guide rail 1-1, thereby avoiding the frame 2 and the energy storage container 3 on the frame 2 from falling.

[0041] The second embodiment is a tower type gravitational energy storage system taking the energy storage container 3 as a heavy block. It is substantially the same as the first embodiment, and the difference is that in the present embodiment, the guide rail 1-1 is not arranged in the portal structure 1. An adjusting mechanism 7 is arranged at the top position of the portal structure 1.

[0042] In the present embodiment, the adjusting mechanism 7 has a first sliding rail 7-1 installed on the beam of the portal structure 1 in the horizontal direction, a first sliding block 7-2 slidably matched with the first sliding rail 7-1 is installed on the first sliding rail 7-1, a second sliding rail 7-3 arranged in the vertical direction of the length direction of the first sliding rail 7-1 is installed on the first sliding block 7-2, the second sliding rail 7-3 is arranged in the horizontal direction, a second sliding block 7-4 slidably matched with the second sliding rail 7-3 is installed on the second sliding rail 7-3, and the pulley block 4-1 is installed on the second sliding block 7-4. In this way, by controlling the movement of the second sliding block 7-4 on the second sliding rail 7-3 and the movement of the first sliding block 7-2 on the first sliding rail 7-1, the position of the pulley block 4-1 and the frame 2 installed on the second sliding block 7-4 in the horizontal direction is adjusted. In this way, the energy storage container 3 is stacked on the ground below the portal structure 1, the frame 2 is moved to the corresponding position of the energy storage container 3 by the adjusting mechanism 7, and the energy storage container 3 is stacked on the frame 2.

[0043] In the present embodiment, the first sliding block 7-2 and the second sliding block 7-4 are in communication connection with the controller. In this way, the controller can control the movement of the first sliding block 7-2 and the second sliding block 7-4 on the first sliding rail 7-1 and the second sliding rail 7-3 respectively, thereby realizing the adjustment of the position of the frame 2.

[0044] In the present embodiment, the portal structure 1 is provided with a guide groove arranged in the length direction of the first sliding rail 7-1 at the positions of both ends of the second sliding rail 7-3, and the second sliding rail 7-3 and the guide groove are slidably matched.

[0045] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A tower type gravitational energy storage system using energy storage containers as heavy blocks, characterized by: Have: Portal structure (1) ; Heavy structure, arranged below the portal structure (1), the heavy structure has a frame (2), the frame (2) can be placed in the energy storage container (3); Connecting mechanism (4) is arranged between the portal structure (1) and the heavy structure, the connecting mechanism (4) can drive the heavy structure to move up and down in the portal structure (1); Drive mechanism (5) is connected to the connecting mechanism (4), and the drive mechanism (5) can drive the connecting mechanism (4) to run and drive the heavy structure to move; The power generation mechanism (6) is connected to the connecting mechanism (4), and the power generation mechanism (6) can convert the gravitational potential energy of the heavy structure into electrical energy when the heavy structure descends; The controller (8) is in communication connection with the drive mechanism (5) and the power generation mechanism (6), and the controller (8) can control the drive mechanism (5) and the power generation mechanism (6) to run.

2. The tower mass gravity energy storage system using energy storage containers as masses according to claim 1, characterized in that: The connecting mechanism (4) has a winding shaft (4-3) mounted on the portal structure (1), the winding shaft (4-3) winds the traction rope (4-2), and the end of the traction rope (4-2) is connected to the frame (2) through the pulley block (4-1) above the heavy structure.

3. The tower mass gravity energy storage system using energy storage containers as masses according to claim 2, characterized in that: The drive mechanism (5) has a motor (5-1), the output shaft of the motor (5-1) is connected with the winding shaft (4-3), and the motor (5-1) can drive the winding shaft (4-3) to rotate.

4. The tower mass gravity energy storage system using energy storage containers as masses according to claim 2, characterized in that: The power generation mechanism (6) has a generator (6-1), and the input shaft of the generator (6-1) is connected with the winding shaft (4-3).

5. The tower mass gravity energy storage system using energy storage containers as masses according to claim 2, characterized in that: An adjusting mechanism (7) is arranged on the portal structure (1), the adjusting mechanism (7) has a first sliding rail (7-1) mounted on the portal structure (1), a first sliding block (7-2) slidably connected with the first sliding rail (7-1) is mounted on the first sliding rail (7-1), a second sliding rail (7-3) arranged perpendicular to the length direction of the first sliding rail (7-1) is mounted on the first sliding block (7-2), a second sliding block (7-4) slidably connected with the second sliding rail (7-3) is mounted on the second sliding rail (7-3), and the pulley block (4-1) is mounted on the second sliding block (7-4). The adjusting mechanism (7) can drive the pulley block (4-1) to move in the horizontal direction.

6. The tower mass gravity energy storage system using energy storage containers as masses according to claim 1, characterized in that: The energy storage container (3) has a battery compartment and an equipment compartment; the battery compartment is provided with a battery rack (3-3), the battery rack (3-3) is provided with a battery cluster (3-4) composed of battery cores, and the battery compartment is provided with a BMS control cabinet (3-5); the equipment compartment is provided with a converter PCS (3-7) and an EMS control cabinet (3-8).

7. The tower mass gravity energy storage system using energy storage containers as masses according to claim 6, characterized in that: A monitoring camera (3-1) is arranged in the battery compartment, the monitoring camera (3-1) is in communication connection with the controller (8), and the monitoring camera (3-1) can obtain image information in the battery compartment and send it to the controller (8).

8. The tower mass gravity energy storage system using energy storage containers as masses according to claim 6, characterized in that: A radiator (3-2) is arranged on the side wall of the battery compartment, and a fire extinguishing cabinet (3-6) is arranged in the battery compartment.

9. The tower mass gravity energy storage system using energy storage containers as masses according to claim 1, characterized in that: The portal structure (1) is provided with guide rails (1-1) arranged in vertical direction at both sides of the frame (2), the frame (2) is provided with guide shoes (2-1) slidingly matched with the guide rails (1-1) at corresponding positions of the side walls of the frame (2) and the guide rails (1-1), and the frame (2) is provided with safety clamps (2-2) at corresponding positions of the side walls of the frame (2) and the guide rails (1-1).

10. The tower mass gravity energy storage system using energy storage containers as masses according to claim 1, wherein: The frame (2) is provided with heat dissipation channels (2-3) on the side walls.

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