Modularized flow battery system

Abstract

The utility model discloses a modularized flow battery system, which comprises a power unit bin, an anode storage tank bin and a cathode storage tank bin, the upper surface of the anode storage tank bin is fixedly connected with the power unit bin, one side of the anode storage tank bin is provided with the cathode storage tank bin, the power unit bin is internally and fixedly connected with two electric pile frames, and the two electric pile frames are fixedly connected with the anode storage tank bin. Eight electric pile bodies are fixedly connected to each electric pile frame, a pipe system is arranged in the power unit bin, and the pipe system is fixedly connected to the electric pile frames. According to the utility model, the power unit bin and the anode storage tank bin are stacked, so that the cathode storage tank bin can be used as an overhaul platform, later overhaul and maintenance are facilitated, sixteen electric pile bodies and four storage tank bodies are designed, energy storage of large electric quantity can be realized, and the heat exchange assembly is additionally arranged on the storage tank bodies, so that the heat exchange efficiency is improved. According to the storage tank, high-temperature electrolyte can be rapidly cooled, and by additionally arranging the tank pressure sensor and the water sealing pipe assembly on the storage tank body, the gas pressure in the tank can be monitored and automatic pressure relief can be realized, so that the safety of a battery system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage, and particularly relates to a modular flow battery system. Background Technique

[0002] A flow battery is composed of a stack unit, electrolytes, an electrolyte storage and supply unit, a management and control unit, etc. It is a high-performance storage battery that separates the positive and negative electrolytes and circulates them separately, and has the characteristics of high capacity, wide application fields, and long cycle service life.

[0003] An existing flow battery, such as a movable flow battery unit disclosed in a Chinese patent with the application number CN201410127367.X, adopts a double-layer layout of 2 20-foot standard containers. Two electrolyte storage tanks and 2 electrolyte circulation pumps are placed in the lower container; a stack, a heat exchange device, a battery management system, an inverter device, a UPS backup power supply, and a temperature regulation device are placed in the upper container. Although the double-layer layout of 2 containers adopted by this patent can reduce the floor space of the system, it also brings many inconveniences to the operation of maintenance personnel and the later maintenance of the stack and electrical control equipment. Therefore, an external operation and maintenance platform needs to be built additionally.

[0004] An existing flow battery, such as a movable flow battery unit disclosed in a Chinese patent with the application number 201922225253.X, includes a container, a power unit, a control unit, and a capacity unit; it is applicable to a zinc-based battery system; among them, the power unit includes at least one stack, pipelines, brackets, pumps and other devices, and the capacity unit includes positive and negative storage tanks, realizing the integration of a containerized flow battery energy storage unit; however, this flow battery has the following defects: first, the volume of the storage tank is small, the stored energy is limited, and the practical application value is small; second, when the temperature of the electrolyte is too high, effective heat exchange cannot be carried out, and it is very difficult to exchange the heat of the electrolyte inside the stack and in the storage tank only by the cabinet air conditioner; third, the safety protection is low and it does not have a gas protection function. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a modular flow battery system to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions: A modular flow battery system includes a power unit bin, a positive electrode storage tank bin, and a negative electrode storage tank bin. The upper surface of the positive electrode storage tank bin is fixedly connected to the power unit bin, and a negative electrode storage tank bin is arranged on one side of the positive electrode storage tank bin. Two stack racks are fixedly connected in the power unit bin, and eight stack bodies are fixedly connected to each stack rack. A pipe system is arranged in the power unit bin, and the pipe system is fixedly connected to the stack racks. The stack bodies are conductively connected to the pipe system. Two storage tank bodies are arranged in each of the positive electrode storage tank bin and the negative electrode storage tank bin, and the storage tank bodies are conductively connected to the pipe system.

[0007] Preferably, a tension beam is fixedly connected in each of the positive electrode storage tank bin and the negative electrode storage tank bin, and the tension beam is arranged at the top of the storage tank body.

[0008] Preferably, a BMS cabinet is arranged in the power unit bin, and the BMS cabinet is arranged on one side of one of the stack racks.

[0009] Preferably, a chiller is fixedly connected to the upper surface of the negative electrode storage tank bin, and a guardrail is fixedly connected to the negative electrode storage tank bin.

[0010] Preferably, heat exchange components are installed on all four storage tank bodies. The heat exchange component includes a base, a heat exchanger, a return liquid pipe, a water inlet pipe, a water outlet pipe, a heat exchange pipe, and a water outlet hole. The base is fixedly connected inside the storage tank body, the heat exchanger is fixedly connected to the base, the return liquid pipe is fixedly connected to the heat exchanger, and the return liquid pipe is fixedly connected to the storage tank body. A plurality of water outlet holes are evenly distributed on the return liquid pipe, and the aperture of the water outlet holes decreases sequentially from bottom to top. The heat exchange pipe is fixedly connected to the heat exchanger, the input end of the heat exchange pipe is conductively fixed with a water inlet pipe, the output end of the heat exchange pipe is conductively fixed with a water outlet pipe, and the water inlet pipe and the water outlet pipe are conductively connected to the chiller.

[0011] Preferably, electrolyte pump components are installed on all four storage tank bodies. The electrolyte pump component includes a pump body, an electric ball valve, a manual butterfly valve, a liquid inlet pipe body, and a rib plate. The liquid inlet pipe body is fixedly connected inside the storage tank body through the rib plate, the output end of the liquid inlet pipe body is conductively connected to the manual butterfly valve, the output end of the manual butterfly valve is conductively connected to the electric ball valve, and the output end of the electric ball valve is conductively fixed with the pump body.

[0012] Preferably, the input ends of the four return liquid pipes and the output ends of the four pump bodies are all conductively connected with corrugated pipes, and the corrugated pipes are conductively connected to the pipe system.

[0013] Preferably, one end of the corrugated pipe is fixedly connected with a semi-circular flange, and the semi-circular flange is fixedly connected to the pipe system. The other end of the corrugated pipe is fixedly connected with a flange body.

[0014] Preferably, a water seal pipe assembly is installed on each of the four storage tank bodies. The water seal pipe assembly includes a water tank, a first exhaust pipe, and a transparent pipe. One end of the transparent pipe is conductively fixed to the storage tank body, and the other end of the transparent pipe is conductively fixed to the water tank. The first exhaust pipe is conductively fixed to the water tank.

[0015] Preferably, a liquid level observation pipe is installed on each of the four storage tank bodies. Both ends of the liquid level observation pipe are conductively fixed to the storage tank body, and a second exhaust pipe is conductively fixed to each of the four storage tank bodies.

[0016] The modular flow battery system provided by the present invention has the following advantages: by stacking the power unit compartments and the positive electrode storage tank compartments, the negative electrode storage tank compartment can be used as a maintenance platform, which facilitates later maintenance and repair. The present invention is designed with sixteen stack bodies and four storage tank bodies, which can achieve large-capacity energy storage. By adding a heat exchange component to the storage tank body, rapid cooling of the high-temperature electrolyte can be achieved. By adding a tank pressure sensor and a water seal pipe assembly to the storage tank body, the gas pressure inside the tank can be monitored and automatic pressure relief can be realized, so as to improve the safety of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present invention;

[0019] Figure 2 It is a schematic three-dimensional structure diagram of the stack frame of the present invention;

[0020] Figure 3 It is a schematic three-dimensional structure diagram of the corrugated pipe of the present invention;

[0021] Figure 4 It is a schematic top view structure diagram of the storage tank body of the present invention;

[0022] Figure 5 It is a schematic front view sectional structure diagram of the storage tank body of the present invention;

[0023] Figure 6 It is a schematic three-dimensional structure diagram of the heat exchanger of the present invention;

[0024] Figure 7 It is a schematic three-dimensional structure diagram of the electrolyte pump assembly of the present invention;

[0025] Figure 8 This is the front view structural schematic diagram of the water seal pipe assembly of the present utility model.

[0026] In the figure: 1. Power unit bin; 11. Stack rack; 12. Stack body; 13. BMS cabinet; 14. Pipe system; 15. Bellows; 151. Half-moon flange; 152. Flange body; 2. Positive electrode storage tank bin; 3. Negative electrode storage tank bin; 4. Chiller; 5. Guardrail; 6. Storage tank body; 61. Heat exchange assembly; 611. Base; 612. Heat exchanger; 613. Return liquid pipe; 614. Water inlet pipe; 615. Water outlet pipe; 616. Heat exchange pipe; 617. Water outlet hole; 62. Electrolyte pump assembly; 621. Pump body; 622. Electric ball valve; 623. Manual butterfly valve; 624. Inlet liquid pipe body; 625. Rib plate; 63. Water seal pipe assembly; 631. Water tank; 632. First exhaust pipe; 633. Transparent pipe; 64. Liquid level observation pipe; 65. Second exhaust pipe; 7. Tie beam. Specific embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to the attached Figure 1 - attached Figure 8, an embodiment provided by the present utility model: a modular flow battery system, including a power unit compartment 1, a positive electrode storage tank compartment 2, and a negative electrode storage tank compartment 3. The upper surface of the positive electrode storage tank compartment 2 is fixedly connected to the power unit compartment 1. A negative electrode storage tank compartment 3 is arranged on one side of the positive electrode storage tank compartment 2. Two stack racks 11 are fixedly connected in the power unit compartment 1. Eight stack bodies 12 are fixedly connected to the stack racks 11. A pipe system 14 is arranged in the power unit compartment 1, and the pipe system 14 is fixedly connected to the stack racks 11. The stack bodies 12 are conductively connected to the pipe system 14. Two storage tank bodies 6 are arranged in both the positive electrode storage tank compartment 2 and the negative electrode storage tank compartment 3, and the storage tank bodies 6 are conductively connected to the pipe system 14. The power unit compartment 1 places the stack bodies 12 through the stack racks 11. The pipe system 14 is used to connect the stack bodies 12 and the storage tank bodies 6. The storage tank bodies 6 are used to store electrolyte solution. The positive electrode storage tank compartment 2 and the negative electrode storage tank compartment 3 are used to protect the storage tank bodies 6; A tie beam 7 is fixedly connected in both the positive electrode storage tank compartment 2 and the negative electrode storage tank compartment 3, and the tie beam 7 is arranged at the top of the storage tank body 6. The tie beam 7 is used to improve the strength of the positive electrode storage tank compartment 2 and the negative electrode storage tank compartment 3; A BMS cabinet 13 is arranged in the power unit compartment 1, and the BMS cabinet 13 is arranged on one side of one of the stack racks 11. The BMS cabinet 13 is a battery management system; A chiller 4 is fixedly connected to the upper surface of the negative electrode storage tank compartment 3. A guardrail 5 is fixedly connected to the negative electrode storage tank compartment 3. The chiller 4 is used to store cold water and also used for heat dissipation treatment of hot water. The guardrail 5 is used to protect operators; Heat exchange components 61 are installed on all four storage tank bodies 6. The heat exchange component 61 includes a base 611, a heat exchanger 612, a return liquid pipe 613, a water inlet pipe 614, a water outlet pipe 615, a heat exchange pipe 616, and a water outlet hole 617. The base 611 is fixedly connected inside the storage tank body 6. The heat exchanger 612 is fixedly connected to the base 611. The return liquid pipe 613 is fixedly connected to the heat exchanger 612, and the return liquid pipe 613 is fixedly connected to the storage tank body 6. A plurality of water outlet holes 617 are evenly distributed on the return liquid pipe 613, and the aperture of the water outlet holes 617 decreases sequentially from bottom to top. The heat exchange pipe 616 is fixedly connected to the heat exchanger 612. The input end of the heat exchange pipe 616 is conductively fixed with a water inlet pipe 614, and the output end of the heat exchange pipe 616 is conductively fixed with a water outlet pipe 615, and the water inlet pipe 614 and the water outlet pipe 615 are conductively connected to the chiller 4. The heat exchange component 61 installs the heat exchanger 612 by using the base 611. The return liquid pipe 613 is used to transport high-temperature electrolyte solution and discharge it into the storage tank body 6 through the water outlet holes 617. The heat exchange pipe 616 of the heat exchanger 612 is used to provide a heat exchange place. The water inlet pipe 614 and the water outlet pipe 615 are used to connect the chiller 4, so as to continuously provide cold water for the heat exchange pipe 616;An electrolyte pump assembly 62 is installed on each of the four storage tank bodies 6. The electrolyte pump assembly 62 includes a pump body 621, an electric ball valve 622, a manual butterfly valve 623, a liquid inlet pipe body 624, and a rib plate 625. The liquid inlet pipe body 624 is fixedly connected inside the storage tank body 6 through the rib plate 625. The output end of the liquid inlet pipe body 624 is conductively connected to the manual butterfly valve 623. The output end of the manual butterfly valve 623 is conductively connected to the electric ball valve 622. The output end of the electric ball valve 622 is conductively fixed to the pump body 621. The electrolyte pump assembly 62 uses the pump body 621 to transport the electrolyte, and transports the cooled electrolyte from the storage tank body 6 to the stack body 12 through the liquid inlet pipe body 624. The electric ball valve 622 and the manual butterfly valve 623 are used to control the on-off of the liquid inlet pipe body 624, and the rib plate 625 is used to fix the liquid inlet pipe body 624; the input ends of the four return pipes 613 and the output ends of the four pump bodies 621 are both conductively connected to a bellows 15, and the bellows 15 is conductively connected to the pipe system 14. The bellows 15 is used to connect the pipe system 14 and the input end of the return pipe 613, and connect the pipe system 14 and the output end of the pump body 621; one end of the bellows 15 is fixedly connected to a semi-moon flange 151, and the semi-moon flange 151 is fixedly connected to the pipe system 14. The other end of the bellows 15 is fixedly connected to a flange body 152. The semi-moon flange 151 is used to facilitate the disassembly and assembly of the bellows 15; a tank pressure sensor and a water seal pipe assembly 63 are installed on each of the four storage tank bodies 6. The water seal pipe assembly 63 includes a water tank 631, a first exhaust pipe 632, and a transparent pipe 633. One end of the transparent pipe 633 is conductively fixed to the storage tank body 6, and the other end of the transparent pipe 633 is conductively fixed to the water tank 631. The first exhaust pipe 632 is conductively fixed to the water tank 631. The water seal pipe assembly 63 uses the water column height in the transparent pipe 633 to display the magnitude of the negative pressure inside the storage tank body 6, and discharges the gas inside the storage tank body 6 through the first exhaust pipe 632. The water tank 631 is used for storing water; a liquid level observation pipe 64 is installed on each of the four storage tank bodies 6, and both ends of the liquid level observation pipe 64 are conductively fixed to the storage tank body 6. A second exhaust pipe 65 is conductively fixed to each of the four storage tank bodies 6. The liquid level observation pipe 64 is used to observe the liquid level of the electrolyte, and the second exhaust pipe 65 is used to discharge the gas inside the storage tank body 6.;

[0029] Working principle: When using the utility model, the stack rack 11 is forklifted to the designated position in the power unit bin 1 and fixed with bolts. Then, the stack body 12 is transported to the stack rack 11 by forklift and fixed with bolts. The BMS cabinet 13 is placed on one side of one of the stack racks 11 and fixed with bolts. Then, the stack body 12 is connected through the pipe system 14. The pipe system 14 has four input main pipes and four output main pipes, specifically the positive forward liquid inlet pipe, negative forward liquid outlet pipe, negative forward liquid inlet pipe, positive forward liquid outlet pipe, positive backward liquid inlet pipe, negative backward liquid outlet pipe, negative backward liquid inlet pipe, and positive backward liquid outlet pipe. The main pipes are connected to the input end and output end of the storage tank body 6 through the bellows 15. The connection part between the bellows 15 and the pipe system 14 is realized by the semi-moon flange 151 for easy disassembly and assembly. The connection part between the bellows 15 and the storage tank body 6 uses the flange body 152; the return pipe 613 of the heat exchange component 61 is the input end of the storage tank body 6, and the output end of the pump body 621 of the electrolyte pump assembly 62 is the output end of the storage tank body 6. The high-temperature electrolyte enters the return pipe 613 and sprays out from the water outlet hole 617, and exchanges heat with the heat exchange pipe 616 on the heat exchanger 612. The chiller 4 transports cold water to the heat exchange pipe 616 through the water inlet pipe 614. The cold water after heat exchange is transported to the chiller 4 through the water outlet pipe 615 for cooling treatment. The electrolyte after heat exchange then enters the storage tank body 6; after the electric ball valve 622 and the manual butterfly valve 623 are opened, the electrolyte in the storage tank body 6 is sucked out from the liquid inlet pipe body 624 through the pump body 621, and is sent into the stack body 12 after passing through the manual butterfly valve 623, the electric ball valve 622, the pump body 621, the bellows 15, and the pipe system 14; when the storage tank body 6 is under positive pressure, the gas in the storage tank body 6 is discharged into the water tank 631 through the transparent pipe 633 and then discharged into the atmosphere through the first exhaust pipe 632. When the storage tank body 6 is under negative pressure, the transparent pipe 633 will suck in the water in the water tank 631, thus forming a water column of a certain height, and the observation can be carried out through the transparent pipe 633; among them, both the positive storage tank bin 2 and the negative storage tank bin 3 are made by welding profiles and steel plates, and a 50-mm-thick polyurethane insulation board is pasted on the inner wall to protect the storage tank body 6. The tie beam 7 is used to improve the strength and stability of the positive storage tank bin 2 and the negative storage tank bin 3, and is used to reduce the deformation of the storage tank body 6. The base 611 is used to install the heat exchanger 612. The rib plate 625 is used to fix the liquid inlet pipe body 624. The liquid level observation pipe 64 is used to observe the electrolyte liquid level in the storage tank body 6. The second exhaust pipe 65 is used to discharge the gas generated in the storage tank body 6 to the outside. The guardrail 5 is used to protect the operators and prevent personnel from falling.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A modular liquid flow battery system, comprising a power unit compartment (1), a positive electrode storage tank compartment (2) and a negative electrode storage tank compartment (3), characterized in that: The upper surface of the positive electrode storage tank bin (2) is fixedly connected to a power unit bin (1), a negative electrode storage tank bin (3) is arranged on one side of the positive electrode storage tank bin (2), two battery stack frames (11) are fixedly connected in the power unit bin (1), eight battery stack bodies (12) are fixedly connected to the battery stack frames (11), a pipe system (14) is arranged in the power unit bin (1), and the pipe system (14) is fixedly connected to the battery stack frames (11), the battery stack bodies (12) are conductively connected to the pipe system (14), two tank bodies (6) are arranged in the positive electrode storage tank bin (2) and the negative electrode storage tank bin (3), and the tank bodies (6) are conductively connected to the pipe system (14).

2. A modular liquid flow battery system according to claim 1, characterized in that: A tension beam (7) is fixedly connected inside the positive electrode storage tank bin (2) and the negative electrode storage tank bin (3), and the tension beam (7) is arranged at the top end of the storage tank body (6).

3. A modular liquid flow battery system according to claim 1, characterized in that: A BMS cabinet (13) is arranged in the power unit compartment (1), and the BMS cabinet (13) is arranged on one side of one of the battery stack racks (11).

4. A modular liquid flow battery system according to claim 3, characterized in that: A chiller (4) is fixedly connected to the upper surface of the negative electrode storage tank bin (3), and a guardrail (5) is fixedly connected to the negative electrode storage tank bin (3).

5. A modular liquid flow battery system according to claim 3, characterized in that: The four storage tank bodies (6) are all equipped with a heat exchange assembly (61), the heat exchange assembly (61) comprising a base (611), a heat exchanger (612), a liquid return pipe (613), a water inlet pipe (614), a water outlet pipe (615), a heat exchange pipe (616) and a water outlet hole (617), and the base (611) is fixedly connected to the storage tank body (6), the heat exchanger (612) is fixedly connected to the base (611), the liquid return pipe (613) is fixedly connected to the heat exchanger (612), and the liquid return pipe (613) is fixedly connected to the heat exchanger (612). 613) is fixedly connected to the storage tank body (6), a plurality of water outlet holes (617) are evenly distributed on the liquid return pipe (613), and the apertures of the water outlet holes (617) decrease from bottom to top. A heat exchange tube (616) is fixedly connected to the heat exchanger (612), the input end of the heat exchange tube (616) is connected and fixed with a water inlet pipe (614), the output end of the heat exchange tube (616) is connected and fixed with a water outlet pipe (615), and the water inlet pipe (614) and the water outlet pipe (615) are connected and connected to the chiller (4).

6. A modular liquid flow battery system according to claim 5, characterized in that: An electrolyte pump assembly (62) is installed on each of the four storage tank bodies (6). The electrolyte pump assembly (62) comprises a pump body (621), an electric ball valve (622), a manual butterfly valve (623), a liquid inlet pipe body (624) and a rib plate (625). The liquid inlet pipe body (624) is fixedly connected to the storage tank body (6) via the rib plate (625). The output end of the liquid inlet pipe body (624) is conductively connected to the manual butterfly valve (623). The output end of the manual butterfly valve (623) is conductively connected to the electric ball valve (622). The output end of the electric ball valve (622) is conductively fixed to the pump body (621).

7. A modular liquid flow battery system according to claim 5, characterized in that: The input ends of the four liquid return pipes (613) and the output ends of the four pump bodies (621) are all conductively connected to a bellows (15), and the bellows (15) is conductively connected to the pipe system (14).

8. A modular liquid flow battery system according to claim 7, characterized in that: One end of the bellows (15) is fixedly connected to a half-moon flange (151), and the half-moon flange (151) is fixedly connected to the pipe system (14), and the other end of the bellows (15) is fixedly connected to a flange body (152).

9. A modular liquid flow battery system according to claim 6, characterized in that: A water seal pipe assembly (63) is installed on each of the four storage tank bodies (6), and the water seal pipe assembly (63) comprises a water tank (631), a first exhaust pipe (632) and a transparent tube (633), and one end of the transparent tube (633) is connected and fixed to the storage tank body (6), and the other end of the transparent tube (633) is connected and fixed to the water tank (631), and the first exhaust pipe (632) is connected and fixed to the water tank (631).

10. A modular liquid flow battery system according to claim 9, characterized in that: The four storage tank bodies (6) are all equipped with a liquid level observation tube (64), and both ends of the liquid level observation tube (64) are connected and fixed to the storage tank body (6). The four storage tank bodies (6) are all connected and fixed with a second exhaust pipe (65).

Images