All-vanadium redox flow battery energy storage power station

Abstract

An all-vanadium redox flow battery energy storage power station comprises a battery stack, the battery stack, an anolyte tank A and a catholyte tank B are arranged in a layered mode, an anolyte outlet of the battery stack is connected with the anolyte tank A through a vertical pipeline, and a catholyte outlet of the battery stack is connected with the catholyte tank B through a vertical pipeline; the anolyte tank A is communicated with a first sulfuric acid pump through a pipeline, the first sulfuric acid pump is communicated with an anolyte inlet of the cell stack through a vertical pipeline, the catholyte tank B is communicated with a second sulfuric acid pump through a pipeline, and the second sulfuric acid pump is connected with a catholyte inlet of the cell stack through a vertical pipeline; according to the all-vanadium redox flow battery energy storage system, container type packaging is adopted, the whole system can be expanded, the energy storage capacity can be flexibly adjusted, the system is simple, the manufacturing cost is low, devices are compactly arranged, and space is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid flow batteries, and in particular relates to an all-vanadium liquid flow battery energy storage power station. Background Art

[0002] Compared with short-term energy storage, long-term energy storage can more effectively reduce the regulation pressure of the power grid and improve energy utilization efficiency. Therefore, the demand for long-term energy storage is growing. The long-term energy storage technology of all-vanadium liquid flow battery is suitable for large-scale energy storage fields such as power generation and transmission due to its safety, environmental protection and long life. As the infrastructure of the power system, it provides flexible and efficient regulation capabilities for the power system. The energy storage medium is an aqueous solution, which operates at room temperature and pressure. There is no risk of explosion or combustion. The expected life is 25 years, and it has high capacity utilization, is environmentally friendly, has a high residual value rate, and the electrolyte can be recycled.

[0003] However, the current all-vanadium liquid flow battery energy storage system has too many devices, the system is too complex, the cost is high, it takes up a lot of space, affects the convenience of use, and cannot flexibly adjust the energy storage capacity. Therefore, there is an urgent need for an energy storage system that can flexibly adjust the energy storage capacity and has a simple system. Utility Model Content

[0004] In order to solve the technical problems that the current all-vanadium liquid flow battery energy storage system has too many devices, the system is too complex, the cost is high, it occupies a large space, affects the convenience of use, and cannot flexibly adjust the energy storage capacity, the utility model provides an all-vanadium liquid flow battery energy storage power station.

[0005] The specific plan is as follows:

[0006] An all-vanadium liquid flow battery energy storage power station comprises a battery stack, wherein the battery stack, an anode electrolyte tank A and a cathode electrolyte tank B are arranged in layers, the anode electrolyte outlet of the battery stack is connected to the anode electrolyte tank A through a vertical pipe, and the cathode electrolyte outlet of the battery stack is connected to the cathode electrolyte tank B through a vertical pipe; the anode electrolyte tank A is connected to a first sulfuric acid pump through a pipe, and the first sulfuric acid pump is connected to the anode electrolyte inlet of the battery stack through a vertical pipe, and the cathode electrolyte tank B is connected to a second sulfuric acid pump through a pipe, and the second sulfuric acid pump is connected to the cathode electrolyte inlet of the battery stack through a vertical pipe;

[0007] The battery stack is arranged inside the battery stack container.

[0008] The battery stack container is electrically connected to the PCS boosting integrated cabin and the secondary monitoring cabin, and the PCS boosting integrated cabin is electrically connected to the secondary monitoring cabin.

[0009] The anode electrolyte tank A and cathode electrolyte tank B are arranged at the lower layer, the battery stack is arranged at the upper layer, and the sulfuric acid pump is arranged next to the electrolyte storage tank.

[0010] The battery stack container integrates a battery management system BMS, the battery stack is electrically connected to the battery management system BMS, and the electrolyte storage tank and the battery stack are vertically connected through a vertical pipe, and the upper and lower openings of the vertical pipe correspond to each other.

[0011] The PCS boost integrated cabin is connected to the power grid, and an energy storage converter PCS is arranged in the PCS boost integrated cabin. The energy storage converter PCS is electrically connected to the battery stack and the battery management system BMS.

[0012] The secondary monitoring cabin is electrically connected to the battery stack or photovoltaic power generation system through a cable, and the battery stack or photovoltaic power generation system supplies power to the secondary monitoring cabin. An energy management system EMS is provided in the secondary monitoring cabin, and the energy management system EMS is electrically connected to the energy storage inverter PCS and the battery management system BMS.

[0013] The secondary monitoring cabin is also provided with auxiliary systems, including a lighting system, a fire alarm system and a ventilation system.

[0014] The beneficial effects of the utility model are:

[0015] The utility model all-vanadium liquid flow battery energy storage system adopts container-type packaging, the whole system can be expanded, the energy storage capacity can be flexibly adjusted, and the system is simple, low in cost, and the equipment is compactly arranged to save space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the PCS pressurized integrated cabin of the utility model.

[0017] Figure 2 This is a schematic diagram of the connection between the two layers of containers.

[0018] Figure 3 This is a top view of a single module layer.

[0019] Figure 4 This is a top view of the second floor of a single module.

[0020] Figure 5 It is a side view of a single module.

[0021] Figure 6 This is a top view of a double-expanded layer.

[0022] Figure 7 This is a bird's-eye view of the second floor that has been doubled in size.

[0023] Figure 8 This is a top view of a layer that has been expanded twice.

[0024] Fig. 9 This is a top view of the second floor that has been expanded twice;

[0025] Fig.10This is the schematic diagram of the energy storage battery.

[0026] Among them, 1 is the anode electrolyte tank A, 2 is the cathode electrolyte tank B, 3 is the first sulfuric acid pump, 4 is the second sulfuric acid pump, 5 is the pipeline, 6 is the battery stack, 7 is the overhead bridge, 8 is the cable, 9 is the BIPV photovoltaic power generation system, 91 is the BIPV light material photovoltaic power generation system, 10 is the wall ① axis, 11 is the wall ② axis, 12 is the wall A axis, 13 is the wall B axis, 14 is the PCS boost integrated cabin DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the implementation of the utility model, not all of the implementation. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 2 , Figure 3 , Figure 4 As shown, the utility model provides an all-vanadium liquid flow battery energy storage power station, including a battery stack 6, wherein the battery stack 6 is layered with an anode electrolyte tank A1 and a cathode electrolyte tank B2, wherein the anode electrolyte outlet of the battery stack 6 is connected to the anode electrolyte tank A1 through a vertical pipe 5, and the cathode electrolyte outlet of the battery stack 6 is connected to the cathode electrolyte tank B2 through a vertical pipe 5; the anode electrolyte tank A1 is connected to a first sulfuric acid pump 3 through a pipe 5, and the first sulfuric acid pump 3 is connected to an anode electrolyte inlet of the battery stack 6 through a vertical pipe 5, and the cathode electrolyte tank B2 is connected to a second sulfuric acid pump 4 through a pipe 5, and the second sulfuric acid pump 4 is connected to a cathode electrolyte inlet of the battery stack 6 through a vertical pipe 5;

[0029] The battery stack 6 is arranged inside the battery stack container.

[0030] The utility model all-vanadium liquid flow battery energy storage system adopts container-type packaging, the whole system can be expanded, the energy storage capacity can be flexibly adjusted, and the system is simple, low in cost, and the equipment is compactly arranged to save space.

[0031] like Figure 2 As shown, the battery stack container is electrically connected to the PCS boosting integrated cabin 14 and the secondary monitoring cabin, and the PCS boosting integrated cabin 14 is electrically connected to the secondary monitoring cabin.

[0032] like Figure 3 and Figure 5As shown, the anode electrolyte tank A1 and the cathode electrolyte tank B2 are arranged in the lower layer, the battery stack 6 is arranged in the upper layer, and the sulfuric acid pump is arranged next to the electrolyte storage tank; an upper and lower three-dimensional two-side arrangement scheme is adopted, the electrolyte storage tank and the sulfuric acid pump with a large load are arranged in the lower layer, and the battery stack 6 is arranged in the upper layer, which not only reduces the occupied area but also reduces the load on the upper layer, saving construction costs, and the layers are vertically connected through vertical pipes 5, saving the length of the pipes 5.

[0033] like Figure 2 As shown, the battery stack 6 is packaged in a container to form an energy storage system. A battery management system BMS is integrated in the battery stack container. The battery stack 6 is electrically connected to the battery management system BMS, and the electrolyte storage tank is vertically connected to the battery stack 6 through a vertical pipe 5. The upper and lower openings of the vertical pipe 5 correspond to each other. The battery management system BMS is used to monitor the battery status information and send control information to the battery stack 6 to prevent the battery from being overcharged and over-discharged, thereby extending the battery life and improving the battery utilization rate.

[0034] like Figure 1 and Figure 2 As shown, the PCS boost integrated cabin 14 is connected to the power grid, and an energy storage inverter PCS is arranged in the PCS boost integrated cabin 14. The energy storage inverter PCS is electrically connected to the battery stack 6 and the battery management system BMS. The battery management system BMS transmits the battery status information to the energy storage inverter PCS, and the energy storage inverter PCS converts the battery stack between AC and DC.

[0035] The PCS boost integrated cabin 14 is in the form of an integrated prefabricated cabin and is arranged at the edge of the second floor of the plant building. The equipment rooms in the cabin are compactly arranged, and the connecting conductors between the energy storage converter PCS and the transformer are shortened, saving materials and improving safety.

[0036] like Figure 2 As shown, the secondary monitoring cabin is electrically connected to the battery stack 6 or the photovoltaic power generation system through a cable, and the battery stack 6 or the photovoltaic power generation system supplies power to the secondary monitoring cabin;

[0037] An energy management system EMS is provided in the secondary monitoring cabin, and the energy management system EMS is electrically connected to the energy storage inverter PCS and the battery management system BMS; the energy management system EMS receives the status information of the battery monitored by the battery management system BMS, and sends the control information to the battery management system BMS, and the energy management system EMS receives the status information of the energy storage inverter PCS, and sends the control information to the energy storage inverter PCS.

[0038] The secondary monitoring cabin is also equipped with an auxiliary system, which includes a lighting system, a fire alarm system, a ventilation system, etc., integrating a complete unit module, and the auxiliary system is connected to the battery stack 6 or the photovoltaic power generation system via a cable 8. The battery stack 6 or the photovoltaic power generation system supplies power to the auxiliary system, saving the power consumption of the factory and greatly improving safety.

[0039] like Figure 3 As shown, the utility model sets a cable overhead bridge 7 at the bottom of the upper floor, and horizontal cables 8 are laid along the overhead bridge 7 and hung at the bottom of the upper floor; vertical cables 8 are installed along the side of the column.

[0040] The utility model adopts liquid cooling to cool the battery stack 6, selects one host to control multiple battery stack 6 devices, replaces the cooling mode of one air conditioner for one battery stack 6, and reduces the operating power consumption by 50%.

[0041] The utility model is provided with a BIPV light material photovoltaic power generation system 91 around the first floor, and a BIPV photovoltaic power generation system 9 is provided on the top of the second floor. The electricity generated by the photovoltaic power generation system is used as the electricity for daily use of the factory.

[0042] Photovoltaic power generation systems are installed around the first floor and on the top of the second floor of the factory building of the utility model. Compared with the single-layer open horizontal setting, the closed factory building structure increases the temperature of the indoor low-temperature environment in winter, thereby improving the charging and discharging efficiency of the liquid flow battery, avoiding the difficulty of low-temperature starting of the liquid flow battery, and the electricity generated by the photovoltaic power generation system can be directly used for the power consumption of the factory building itself, reducing the power consumption rate of the factory.

[0043] like Fig.10 The schematic diagram of the energy storage battery is shown. The working process of the utility model is:

[0044] The electrolyte in the anode electrolyte tank A1 is transported to the battery stack 6 through the vertical pipe 5 by the first sulfuric acid pump 3. After the electrolyte undergoes a chemical reaction in the battery stack 6, it flows into the anode electrolyte tank A1 through the pipe 5.

[0045] The electrolyte in the cathode electrolyte tank B2 is transported to the battery stack 6 through the vertical pipe 5 by the second sulfuric acid pump 4. After the electrolyte undergoes a chemical reaction in the battery stack 6, it flows into the cathode electrolyte tank B2 through the pipe 5.

[0046] The photovoltaic power generation system or the battery stack 6 is used to supply power to the electrical equipment in the factory. The DC current flows through the battery stack and converges to the energy storage converter PCS, and is then inverted into AC and connected to the grid via a step-up transformer.

[0047] The plant and energy storage system of the present invention can be set to the following specific values, and can also be set to other values.

[0048] Basic single module 500kW: BIPV light material photovoltaic power generation system 91 is set around the first floor of the factory building. The net height of the first floor of the factory building is 6m, the length is 10.5m, the width is 6m, and the total area of ​​the single floor is 63 square meters. Anode electrolyte tank A1 and cathode electrolyte tank B2 are set on the first floor of the plant. The distance between anode electrolyte tank A1 and cathode electrolyte tank B2 is 1.5m. The distance between anode electrolyte tank A1 and wall axis 10, and the distance between cathode electrolyte tank B2 and wall axis 11 are both 1m. The distance between anode electrolyte tank A1 and wall axis A12, and the distance between cathode electrolyte tank B2 and wall axis B13 are both 1.25m. The sulfuric acid pump is set next to the electrolyte storage tank. Specifically, the first sulfuric acid pump 3 is set next to the anode electrolyte tank A1, and the second sulfuric acid pump 4 is set next to the cathode electrolyte tank B2. The pipeline 5 connecting the electrolyte storage tank is connected to the battery stack 6 through the sulfuric acid pump. The pipeline 5 between the floors of the plant is installed vertically, and the upper and lower ports correspond. The tank body of the electrolyte storage tank is designed to be 3.5m in diameter and 4.8m in height. The specific values ​​can be modified in actual projects.

[0049] A BIPV photovoltaic power generation system 9 is installed on the roof of the second floor of the factory building. The height of the second floor of the factory building is 3m, and it is open on all sides. A cable overhead bridge 7 is hoisted at the bottom of the second floor slab. The horizontal cable 8 channel is installed overhead and hung at the bottom of the second floor slab. The vertical cable 8 channel is installed along the side of the column. A battery stack container, a PCS booster integrated cabin 14 and a secondary monitoring cabin are set on the second floor of the factory building. The battery stack container is electrically connected to the PCS booster integrated cabin 14 and the secondary monitoring cabin through a cable 8. The PCS booster integrated cabin 14 is electrically connected to the secondary monitoring cabin through a cable 8. The battery stack container has an integrated battery management system BMS. The PCS booster integrated cabin 14 is equipped with an energy storage converter PCS and a transformer. The PCS booster integrated cabin 14 is set at the edge of the second floor. The equipment inside the cabin is compact. The secondary monitoring cabin is equipped with an energy management system EMS and auxiliary systems such as lighting, fire alarm, and ventilation.

[0050] If there are multiple modules, a general secondary monitoring cabin can be set up on the second floor of the factory building, and the general secondary monitoring cabin can be used to control the secondary monitoring cabins of all individual modules.

[0051] like Figure 6 and Figure 7 As shown, the extended 1MW module doubles the length or width of the basic 500kW module plant, and the connection method between the equipment remains unchanged. For example, the plant length can be 10.5m, the width can be 12m, and the total single-story area can be 126 square meters.

[0052] like Figure 8 and Fig. 9As shown, the extended 2MW module doubles the length or width of the 1MW module plant, and the connection method between the equipment remains unchanged. For example, the plant length can be 21m, the width can be 12m, and the total single-story area is 252 square meters.

[0053] The extended nMW module has a single-layer area of ​​n*63 square meters in total.

[0054] After the modules are assembled according to the capacity required by the specific project, stairs for going up and down stairs are set at the ends on both sides.

[0055] The utility model adopts a modular design, and the energy storage capacity can be freely expanded, which greatly improves the flexibility of the energy storage system configuration. The pipes 5 between the layers are installed vertically, saving the material of the pipes 5. The electrolyte storage tanks with large loads are placed on the first layer, and the containers with small loads are placed on the second layer, which reduces the load on the second layer. The three-dimensional method is adopted to reduce the floor space occupied by the energy storage system and improve the land utilization rate.

[0056] In the utility model, the lower layer is the first layer, and the upper layer is the second layer.

[0057] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. An all-vanadium liquid flow battery energy storage power station, characterized in that: The invention comprises a battery stack (6), wherein the battery stack (6) is arranged in layers with an anolyte tank A (1) and a cathode electrolyte tank B (2); the anolyte outlet of the battery stack (6) is connected to the anolyte tank A (1) via a vertical pipe (5), and the cathode electrolyte outlet of the battery stack (6) is connected to the cathode electrolyte tank B (2) via a vertical pipe (5); the anolyte tank A (1) is connected to a first sulfuric acid pump (3) via a pipe (5), the first sulfuric acid pump (3) is connected to an anolyte inlet of the battery stack (6) via a vertical pipe (5), the cathode electrolyte tank B (2) is connected to a second sulfuric acid pump (4) via a pipe (5), and the second sulfuric acid pump (4) is connected to the cathode electrolyte inlet of the battery stack (6) via a vertical pipe (5); The battery stack (6) is arranged inside the battery stack container.

2. The all-vanadium liquid flow battery energy storage power station according to claim 1 is characterized in that: The battery stack container is electrically connected to the PCS booster integrated cabin (14) and the secondary monitoring cabin, and the PCS booster integrated cabin (14) is electrically connected to the secondary monitoring cabin.

3. The all-vanadium liquid flow battery energy storage power station according to claim 1 is characterized in that: The anode electrolyte tank A (1) and the cathode electrolyte tank B (2) are arranged on the lower layer, the battery stack (6) is arranged on the upper layer, and the sulfuric acid pump is arranged close to the electrolyte storage tank.

4. The all-vanadium liquid flow battery energy storage power station according to claim 1 is characterized in that: A battery management system BMS is integrated in the battery stack container, the battery stack (6) is electrically connected to the battery management system BMS, and the electrolyte storage tank and the battery stack (6) are vertically connected via a vertical pipe (5), and the upper and lower openings of the vertical pipe (5) correspond to each other.

5. The all-vanadium liquid flow battery energy storage power station according to claim 2 is characterized in that: The PCS boost integrated cabin (14) is connected to a power grid, and an energy storage converter PCS is arranged in the PCS boost integrated cabin (14), and the energy storage converter PCS is electrically connected to a battery stack (6) and a battery management system BMS.

6. The all-vanadium liquid flow battery energy storage power station according to claim 2, characterized in that: The secondary monitoring cabin is electrically connected to the battery stack (6) or the photovoltaic power generation system via a cable, the battery stack (6) or the photovoltaic power generation system supplies power to the secondary monitoring cabin, an energy management system EMS is provided in the secondary monitoring cabin, and the energy management system EMS is electrically connected to the energy storage converter PCS and the battery management system BMS.

7. The all-vanadium liquid flow battery energy storage power station according to claim 6 is characterized in that: The secondary monitoring cabin is also provided with auxiliary systems, including a lighting system, a fire alarm system and a ventilation system.

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