A structure of a sunken all-vanadium redox flow energy storage system

Abstract

The present invention discloses a structural design of a sunken all-vanadium redox flow energy storage system, including a platform main body, a movable partition board and a rainproof rolling curtain. The movable partition board and the rainproof rolling curtain are both arranged on the platform main body. The platform main body is arranged in a sunken form below the ground. The sunken all-vanadium redox flow energy storage power station adopts a top-sealed design, and no independent shading equipment needs to be added during the later operation and maintenance of the power station, reducing equipment investment. A four-level waterproof and drainage structure is designed, making the waterproof effect of the sunken all-vanadium redox flow energy storage system better.

Description

Technical Field

[0001] The present invention relates to the field of battery waterproofing, and specifically relates to a sunken all-vanadium redox flow energy storage system structure. Background Art

[0002] At present, large-scale all-vanadium redox flow energy storage power stations all adopt an integrated container design placed on the ground or a decentralized arrangement design inside a building. Due to the low energy density of the electrolyte of the all-vanadium redox flow battery, in order to meet the long-term energy storage requirements, it is necessary to increase the electrolyte volume to achieve this goal, which also makes the floor area of the all-vanadium redox flow energy storage power station larger than that of the lithium battery energy storage power station. In order to minimize the floor area of the all-vanadium redox flow battery energy storage power station, usually the following two methods are adopted: First, for the energy storage power station with an integrated container structure, usually the methods of densely arranging the containers and stacking the power unit containers of the all-vanadium redox flow energy storage system on top of the capacity unit containers are used to reduce the floor area; Second, for the building-integrated decentralized arrangement energy storage power station, usually the methods of increasing the building floor height or densely arranging the equipment are used to reduce the floor area. Although these methods can all reduce the floor area, they increase the later operation and maintenance difficulty and the construction cost of the energy storage power station.

[0003] One of the most important problems existing in the mixed acid system vanadium electrolyte during long-term cycling is the safety problem caused by side reactions, that is, the by-products H2 and Cl2 will explode under light conditions after mixing. In the state of imbalance between the positive and negative electrolytes of the vanadium battery, the reasons for the generation of by-products at the positive and negative electrodes are: (1) Cl in the positive electrolyte - is extremely easy to be oxidized in the high SOC state, thus precipitating Cl2, which is easy to cause corrosion and environmental pollution, and has strict requirements on the sealing of the entire battery system; (2) During long-term operation, trace amounts of H at the negative electrode + will undergo a hydrogen evolution reaction (HER). After long-term operation, hydrogen will accumulate, and the existence of by-product hydrogen must be considered during the system development and actual application process. Therefore, during actual application, it is necessary to equip professional shading equipment during operation and maintenance operations, increasing the equipment investment of the energy storage power station. Summary of the Invention

[0004] The purpose of the present invention is to provide a sunken all-vanadium redox flow energy storage system structure. The sunken all-vanadium redox flow energy storage power station adopts a top-sealed design, and does not require an additional independent shading device during the later operation and maintenance of the power station, reducing the equipment investment. And a four-level waterproof and drainage structure is designed to make the waterproof effect of the sunken all-vanadium redox flow energy storage system better.

[0005] A sunken all-vanadium redox flow energy storage system structure, comprising a platform main body, a movable partition board and a rainproof rolling curtain. The movable partition board includes a canopy, a walking support, walking wheels, a walking slideway and a rainproof trough plate. The rainproof trough plate is fixedly installed at the upper end of the top of the platform main body. The walking slideway is fixedly connected to the upper end of the rainproof trough plate. The walking wheels are rollingly connected to the walking slideway. The canopy is connected to the walking wheels through the walking support.

[0006] The rainproof rolling curtain includes a reel motor, a reel, a PVC rolling curtain cloth, a hanging steel wire rope, a hanging pulley and a rolling curtain hanging cylinder. The reel motor is installed at the lower end of the top of the platform main body through a reel motor hanger. The reel is rotatably connected to the lower end of the reel motor hanger, and one end of the reel is connected to the output shaft of the reel motor. The other end of the reel is connected to the hanger bolt through a bearing. The hanger bolt is fixedly connected to the lower end of the top of the platform main body. The hanging steel wire rope is suspended at the lower end of the top of the platform main body and is perpendicular to the reel. The hanging pulley is rotatably connected to the hanging steel wire rope, and a rolling curtain hanging cylinder is also rotatably connected to the lower end of the hanging pulley. The PVC rolling curtain cloth is connected to the rolling curtain hanging cylinder.

[0007] Preferably, a cofferdam is provided on each side of the platform main body. A water isolation cavity is also provided between the cofferdam and the platform main body. Drainage grooves are provided on both sides of the upper end surface of the platform main body. A drainage pump one and a drain pipe are provided in the water isolation cavity. One end of the drain pipe is connected to the drainage pump one, and the other end communicates with the drainage groove.

[0008] Preferably, a confluence groove is also provided at the bottom on the right side of the platform main body. A drainage pump two and a drain pipe are provided in the confluence groove. One end of this drain pipe is connected to the drainage pump two, and the other end communicates with the drainage groove.

[0009] Preferably, the walking wheels are connected to the output shaft of a walking motor. The walking motor is installed at the lower end of the canopy through a motor hanger.

[0010] Preferably, a traction lifting lug is also connected to the hanging pulley. A traction motor is fixedly connected to the lower end of the top of the platform main body. The traction motor is connected to the traction lifting lug through a traction steel wire rope.

[0011] Preferably, concrete columns are fixedly connected to the lower end of the platform main body. A waterproof boss is provided at the bottom of the platform main body. An electrolyte storage tank and an electrostack device are provided on the waterproof boss.

[0012] Preferably, a hydraulic elevator is also provided on the left side of the platform main body. A hydraulic cylinder is provided at the bottom of the hydraulic elevator.

[0013] The advantages of the present invention are as follows: A four - level waterproof and drainage structure is adopted: 1. The first - level waterproof and drainage is achieved by setting a cofferdam and a drainage trough on the plane of the ground support structure of the sunken structure, ensuring the timely drainage of the flat - surface water accumulation and preventing external water from entering the upper plane of the sunken structure; 2. The second - level waterproof and drainage is achieved by setting a rain - proof curtain structure below the partition board and above the core equipment such as the all - vanadium redox flow energy storage capacity unit, power unit, BMS, and PCS. The unfolding and retracting of the rain - proof rolling curtain cloth are realized through a drum motor hanging mechanism. The head of the entire rain - proof structure is slightly higher than the tail to ensure that the accumulated water flows out along the slope; 3. The third - level waterproof and drainage is achieved by placing the core equipment such as the vanadium redox flow energy storage capacity unit, power unit, BMS, and PCS on the waterproof convex platform of the sunken structure. Once water enters the sunken structure, it can be discharged through the confluence trough and the drainage pump to protect the safety of the core equipment; 4. The fourth - level waterproof and drainage is achieved by building a waterproof structure with a water - isolation cavity and a drainage pipe around the sunken structure, which can effectively prevent underground seepage and protect the safety inside the sunken structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the device of the present invention;

[0015] Figure 2 is the structural schematic diagram of the movable partition board in the device of the present invention;

[0016] Figure 3 is Figure 2 the enlarged view of part A in

[0017] Figure 4 is the structural schematic diagram of the drum part in the device of the present invention;

[0018] Figure 5 is the structural schematic diagram of the hanging steel wire rope part in the device of the present invention.

[0019] Among them, 1. Movable partition board, 2. Rain - proof rolling curtain, 3. Cofferdam, 4. Water - isolation cavity, 5. Drainage pump 1, 6. Drainage pipe, 7. Drainage trough, 8. Hydraulic elevator, 9. Hydraulic cylinder, 10. Waterproof convex platform, 11. Electrolyte storage tank, 12. Stack device, 13. Confluence trough, 14. Drainage pump 2, 15. Concrete pillar, 101. Rain shelter, 102. Walking support, 103. Walking wheel, 104. Walking slideway, 105. Rain - proof trough board, 106. Motor hanging bracket, 107. Walking motor, 201. Drum motor, 202. Drum motor hanging bracket, 203. Drum, 204. Bearing, 205. Hanging bracket bolt, 206. PVC rolling curtain cloth, 207. Hanging steel wire rope, 208. Hanging pulley, 209. Traction ear, 210. Rolling curtain hanging cylinder, 211. Traction steel wire rope, 212. Traction motor. DETAILED DESCRIPTION OF THE INVENTION

[0020] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0021] As Figures 1 to 5 shown, the present invention includes a platform main body, a movable partition 1 and a rainproof rolling curtain 2. The movable partition 1 and the rainproof rolling curtain 2 are both arranged on the platform main body, and the platform main body is arranged below the ground in a sunken form;

[0022] The movable partition 1 includes a canopy 101, a walking support 102, walking wheels 103, a walking slideway 104 and a rainproof trough plate 105. The rainproof trough plate 105 is fixedly installed at the upper end of the top of the platform main body. The walking slideway 104 is fixedly connected to the upper end of the rainproof trough plate 105. The walking wheels 103 are rollingly connected to the walking slideway 104. The canopy 101 is connected to the walking wheels 103 through the walking support 102.

[0023] The rainproof rolling curtain 2 includes a reel motor 201, a reel 203, a PVC rolling curtain cloth 206, a hanging steel wire rope 207, a hanging pulley 208 and a rolling curtain hanging cylinder 210. The reel motor 201 is installed at the lower end of the top of the platform main body through a reel motor hanger 202. The reel 203 is rotatably connected to the lower end of the reel motor hanger 202, and one end of the reel 203 is connected to the output shaft of the reel motor 201. The other end of the reel 203 is connected to a hanger bolt 205 through a bearing 204. The hanger bolt 205 is fixedly connected to the lower end of the top of the platform main body. The hanging steel wire rope 207 is suspended at the lower end of the top of the platform main body and is perpendicular to the reel 203. The hanging pulley 208 is rotatably connected to the hanging steel wire rope 207, and a rolling curtain hanging cylinder 210 is also rotatably connected to the lower end of the hanging pulley 208. The PVC rolling curtain cloth 206 is connected to the rolling curtain hanging cylinder 210.

[0024] Particularly, a cofferdam 3 is provided on the outside of the platform main body. A water isolation cavity 4 is also provided between the cofferdam 3 and the platform main body. A drainage groove 7 is provided on the upper end surface of the platform main body. A drainage pump 5 and a drain pipe 6 are provided in the water isolation cavity 4. One end of the drain pipe 6 is connected to the drainage pump 5, and the other end communicates with the drainage groove 7.

[0025] Moreover, a confluence trough 13 is also provided at the bottom on the right side of the platform main body. A drainage pump 14 and a drain pipe 6 are also provided in the confluence trough 13. One end of this drain pipe 6 is connected to the drainage pump 14, and the other end communicates with the drainage groove 7.

[0026] Once water enters the sunken structure, it can be discharged through the confluence trough and the drainage pump to protect the safety of the core equipment.

[0027] Among them, the traveling wheels 103 are connected to the output shaft of the traveling motor 107, and the traveling motor 107 is installed at the lower end of the awning 101 through the motor hanger 106.

[0028] In addition, a traction lug 209 is also connected to the hanging pulley 208, and a traction motor 212 is fixedly connected to the lower end of the top of the platform main body. The traction motor 212 is connected to the traction lug 209 through a traction steel wire rope 211.

[0029] Specifically, a concrete pillar 15 is fixedly connected to the lower end of the platform main body, and a waterproof boss 10 is provided at the bottom of the platform main body. An electrolyte storage tank 11 and a stack device 12 are provided on the waterproof boss 10. A hydraulic elevator 8 is also provided on the left side of the platform main body, and a hydraulic cylinder 9 is provided at the bottom of the hydraulic elevator 8

[0030] Specific implementation manners and principles:

[0031] Since the energy density of the electrolyte of the all-vanadium redox flow battery is relatively low, it is necessary to increase the volume of the electrolyte to meet the demand for long-term energy storage, which makes the floor area of the all-vanadium redox flow energy storage power station generally higher than that of the mainstream lithium battery power stations in the market. In order to reduce the floor area, the methods of dense arrangement of containers and increasing the height of the integrated building are usually adopted, which also significantly increases the later operation and maintenance costs and the power station construction costs.

[0032] Therefore, the optimization of the present invention is: the sunken all-vanadium redox flow energy storage power station adopts the method of placing the all-vanadium redox flow battery capacity unit, power unit, BMS and PCS as a whole in the underground structure, and placing the primary and secondary cabins, EMU cabin and transformer of the energy storage power station on the fixed partition above the sunken structure, which minimizes the floor area and the power station construction cost of the energy storage power station.

[0033] For the independent shading device to meet the operation and maintenance requirements of the outdoor energy storage power station,

[0034] Since the by-products H2 and Cl2 generated during the actual operation of the mixed acid system electrolyte will explode under the illumination condition after mixing, it is necessary to equip with professional shading devices during the operation and maintenance operations, which increases the equipment investment.

[0035] Therefore, the optimization of the present invention is: the sunken all-vanadium redox flow energy storage power station adopts a top-sealed design, and there is no need to add an independent shading device during the later operation and maintenance of the power station, which reduces the equipment investment.

[0036] In other aspects,

[0037] In the structural design of the sunken all-vanadium redox flow energy storage power station of the present invention, the capacity unit, power unit, BMS, and PCS of the all-vanadium redox flow battery are integrally placed in the underground structure, and the transformer, primary and secondary cabins, and EMU cabin of the energy storage power station are uniformly placed on the fixed partition above the sunken structure, saving the floor area of the power station to the greatest extent. At the same time, the sunken structural design eliminates the container cost investment of the all-vanadium redox flow energy storage power station with container integrated design and the construction investment of the all-vanadium redox flow energy storage power station with building integrated design.

[0038] In the design of the sunken all-vanadium redox flow energy storage power station, the ground support structure adopts a combined structure of fixed and movable partitions. The fixed partition has good load-bearing characteristics, and the movable partition adopts full-automatic control, ensuring the convenience of equipment hoisting during the operation and maintenance of the energy storage power station. At the same time, maintenance personnel enter the interior of the sunken energy storage bin using a hydraulic lift as the daily inspection entrance.

[0039] In terms of waterproofing,

[0040] The present invention adopts a four-level waterproof and drainage structure: (1) The first-level waterproof and drainage is achieved by setting a cofferdam and a drainage trough on the plane of the ground support structure of the sunken structure, ensuring the timely discharge of accumulated water on the plane and preventing external accumulated water from entering the upper plane of the sunken structure; (2) The second-level waterproof and drainage is achieved by setting a rainproof curtain structure below the partition and above the core equipment such as the all-vanadium redox flow energy storage capacity unit, power unit, BMS, and PCS. The rainproof curtain cloth is unfolded and retracted through a drum motor hanging mechanism. The head of the entire rainproof structure is slightly higher than the tail to ensure that the accumulated water flows out along the slope; (3) The third-level waterproof and drainage is achieved by placing the core equipment such as the vanadium redox flow energy storage capacity unit, power unit, BMS, and PCS on the waterproof platform of the sunken structure. Once water enters the interior of the sunken structure, it can be discharged through the confluence trough and drainage pump to protect the safety of the core equipment; (4) The fourth-level waterproof and drainage is achieved by building a waterproof structure with a water isolation chamber and a drainage pipe around the sunken structure, which can effectively prevent underground seepage and protect the safety inside the sunken structure.

[0041] Since the by-products H2 and Cl2 generated during the actual operation of the all-vanadium redox flow battery mixed acid system electrolyte will explode under light conditions after mixing, the sunken all-vanadium redox flow energy storage power station adopts a top-sealed design, and no independent shading equipment needs to be added during the later operation and maintenance of the power station, reducing equipment investment.

[0042] The movable partition and the automatic waterproof curtain are uniformly controlled by the BMS in a chain. When maintenance personnel are preparing to perform equipment maintenance, the BMS can only allow maintenance personnel to enter the interior of the sunken power station after swiping the card and taking the hydraulic lift when the movable partition is closed and the automatic waterproof curtain is opened, ensuring that maintenance operations can be carried out under shading and waterproof conditions.

[0043] Based on the above, the sunken all-vanadium redox flow energy storage power station of the present invention adopts a top-sealed design, and there is no need to add independent shading equipment during the later operation and maintenance of the power station, reducing equipment investment. And a four-level waterproof and drainage structure is designed, making the waterproof effect of the sunken all-vanadium redox flow energy storage system better.

[0044] As is known by technical common sense, the present invention can be implemented by other embodiments that do not depart from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A sunken all-vanadium redox flow energy storage system structure, characterized in that, It includes a platform main body, a movable partition (1) and a rainproof rolling curtain (2). The movable partition (1) and the rainproof rolling curtain (2) are both arranged on the platform main body, and the platform main body is fixedly arranged below the ground in a sunken form; the ground support structure adopts a combined structure of a fixed type and a movable partition (1); the transformers, primary and secondary cabins, and EMU cabins of the all-vanadium redox flow energy storage power station are uniformly placed on the fixed partition above the sunken structure; a rainproof rolling curtain (2) is arranged below the partition, and the capacity unit, power unit, BMS and PCS are located below the rainproof rolling curtain (2); a cofferdam (3) is arranged outside the platform main body, a water isolation cavity (4) is also arranged between the cofferdam (3) and the platform main body, and a drain trough (7) is arranged on the upper end surface of the platform main body. A drain pump one (5) and a drain pipe (6) are arranged in the water isolation cavity (4). One end of the drain pipe (6) is connected to the drain pump one (5), and the other end communicates with the drain trough (7); a confluence trough (13) is also arranged at the right bottom of the platform main body, a drain pump two (14) and a drain pipe (6) are arranged in the confluence trough (13). One end of this drain pipe (6) is connected to the drain pump two (14), and the other end communicates with the drain trough (7); the lower end of the platform main body is fixedly connected with a concrete pillar (15), and a waterproof boss (10) is arranged at the bottom of the platform main body. An electrolyte storage tank (11) and a stack device (12) are arranged on the waterproof boss (10).

2. The structure of a sunken all-vanadium redox flow energy storage system according to claim 1, characterized in that: The movable partition (1) includes a rain shelter (101), a walking support (102), walking wheels (103), a walking slideway (104) and a rainproof trough plate (105). The rainproof trough plate (105) is fixedly installed on the top end of the platform main body. The walking slideway (104) is fixedly connected to the upper end of the rainproof trough plate (105). The walking wheels (103) are rollingly connected to the walking slideway (104). The rain shelter (101) is connected to the walking wheels (103) through the walking support (102); the walking wheels (103) are connected to the output shaft of a walking motor (107), and the walking motor (107) is installed at the lower end of the rain shelter (101) through a motor hanger (106).

3. The structure of a sunken all-vanadium redox flow energy storage system according to claim 1, wherein: The rainproof rolling curtain (2) includes a drum motor (201), a drum (203), a PVC rolling curtain cloth (206), a hanging steel wire rope (207), a hanging pulley (208) and a rolling curtain hanging cylinder (210). The drum motor (201) is installed at the lower end of the top of the platform main body through a drum motor hanging bracket (202). The drum (203) is rotatably connected to the lower end of the drum motor hanging bracket (202), and one end of the drum (203) is connected to the output shaft of the drum motor (201). The other end of the drum (203) is connected to a hanger bolt (205) through a bearing (204). The hanger bolt (205) is fixedly connected to the lower end of the top of the platform main body. The hanging steel wire rope (207) is suspended at the lower end of the top of the platform main body and is perpendicular to the drum (203). The hanging pulley (208) is rotatably connected to the hanging steel wire rope (207), and the lower end of the hanging pulley (208) is also rotatably connected to a rolling curtain hanging cylinder (210). The PVC rolling curtain cloth (206) is connected to the rolling curtain hanging cylinder (210). A traction lug (209) is also connected to the hanging pulley (208). A traction motor (212) is fixedly connected to the lower end of the top of the platform main body. The traction motor (212) is connected to the traction lug (209) through a traction steel wire rope (211).

4. A sunken all-vanadium redox flow energy storage system structure according to claim 1, characterized in that: A hydraulic elevator (8) is also provided on the left side of the platform main body. A hydraulic cylinder (9) is provided at the bottom of the hydraulic elevator (8).

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