Slidable electric pile module supporting structure of flow battery

Abstract

A slidable pile module supporting structure of a flow battery comprises a main support bottom beam, a power container is fixed on the main support bottom beam, the power container comprises a frame formed by fixing main support vertical beams and a pile bearing bottom beam together, and a plurality of main support vertical beams are fixed on the edges of the two sides of the main support bottom beam. A plurality of parallel galvanic pile bearing bottom beams are arranged above the main body bracket bottom beams; and the edges of the galvanic pile bearing bottom beams are fixed on the main body bracket vertical beams. Compared with the prior art, the invention has the technical effects that the movable electric pile is arranged, a special forklift for the electric pile is not relied on any more, only a worker passes through a maintenance road, and the width of the maintenance road is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrochemical energy storage, and in particular relates to a slidable stack module support structure for a liquid flow battery. Background Art

[0002] Liquid flow battery energy storage is a type of electrochemical energy storage. Currently, the most widely used ones include iron-chromium liquid flow batteries, all-vanadium liquid flow batteries, organic liquid flow batteries, etc. Compared with other electrochemical energy storage forms such as lithium iron phosphate and sodium-sulfur batteries, which currently have a higher market share, liquid flow batteries have the advantages of high safety, fast charging and discharging speed, environmental friendliness, and long service life. It has become the focus of research and development in the current large-scale energy storage field. However, liquid flow batteries currently also have low energy density, large volume and weight, and high equipment costs. In particular, the low capacity density of liquid flow batteries leads to a large volume and weight of equipment per unit energy capacity, which has become one of the key factors restricting the promotion of liquid flow battery energy storage. In addition, the stacks of liquid flow batteries are generally arranged in rows in power containers. The inspection and maintenance of the equipment requires the stacks to be moved out with a special forklift, so a 2.5-3.5 meter wide inspection road needs to be reserved in the power station or power station building (see Figure 5 800), further reducing the energy capacity per unit area of ​​the flow battery. For projects with limited floor space such as thermal power plants or renovations, the low energy capacity per unit area of ​​the flow battery becomes an insurmountable disadvantage.

[0003] At the same time, the electrolyte of liquid flow battery energy storage is an acidic solution of metal oxides or organic matter. For example, for all-vanadium liquid flow battery energy storage, the electrolyte is a vanadium pentoxide solution in sulfuric acid solution. Although there is no fire risk, the nature of the weak acid will cause acid corrosion to the metal material. In order to ensure the long-term safe operation of the system, it is necessary to set up a special electrolyte leakage collection and treatment device in the power container to minimize the pollution area of ​​the leaked electrolyte. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to design a slidable stack module support structure for a flow battery to reduce the width of the maintenance road.

[0005] The technical solution of the present invention is specifically as follows: A slidable stack module support structure for a liquid flow battery comprises a power container fixed on a main support bottom beam, the power container comprises a frame formed by fixing a main support vertical beam and a stack load-bearing bottom beam together, a number of main support vertical beams are fixed to both side edges of the main support bottom beam, a plurality of parallel stack load-bearing bottom beams are arranged above the main support bottom beam, the edges of the stack load-bearing bottom beams are fixed on the main support vertical beams, which divide the space above the main support bottom beam into a plurality of stack spaces, a stack is arranged in each stack space, the stack is placed on the stack load-bearing bottom beam, a slidable component of the slidable stack module support structure is arranged between the stack and the stack load-bearing bottom beam, and the slidable component is used for sliding the stack on the stack load-bearing bottom beam.

[0006] The main support bottom beam, the main support vertical beam and the stack load-bearing bottom beam are fixed together by welding as an integrated structure.

[0007] The slidable component includes an upper groove of the slidable component, a lower groove of the slidable component and a rolling component. The bottom of the battery stack body includes a load-bearing beam and an outer supporting bottom beam of the battery stack. The lower side of the load-bearing beam and the outer supporting bottom beam of the battery stack is fixed with the upper groove of the slidable component. The upper surface of the load-bearing bottom beam of the battery stack is fixed with the lower groove of the slidable component. The upper groove of the slidable component corresponds to the lower groove of the slidable component up and down, and the rolling component is rotatably connected to the upper groove of the slidable component or the lower groove of the slidable component.

[0008] Upper groove limit angle steels are welded and fixed at the two inner upper feet of the upper groove of the sliding component. The inclination angle of the upper groove limit angle steel is welded and fixed at °-°. The two upper groove limit angle steels are symmetrically arranged in the upper groove of the sliding component to form a guide groove for stable sliding of the rolling component; lower groove limit angle steels are also symmetrically welded and fixed in the lower groove of the sliding component to form a guide groove for stable sliding of the rolling component, and the rolling component is fixed in the lower groove of the sliding component through the bearing of the rolling component.

[0009] The space between the battery stack and the battery stack load-bearing bottom beam above it is the upper space of the battery stack main support, and the space between the battery stack and the battery stack load-bearing bottom beam below it is the lower space of the battery stack main support. The battery stack is connected to one end of the electrolyte delivery pipeline, and one end of the electrolyte delivery pipeline is coiled through the lower space of the battery stack main support or the upper space of the battery stack main support, and then led out to the power container and connected to the electrolyte storage tank.

[0010] A stack towing hook is fixed on the inspection side of the outer supporting bottom beam of the stack, and at least two stack towing hooks are provided for one stack.

[0011] A leaked electrolyte collection tank is arranged at the bottom of the bottom beam of the main support, and the lowest part of the bottom plate of the leaked electrolyte collection tank is connected to one end of the electrolyte lead-out pipe.

[0012] The bottom plate of the leaked electrolyte collection tank is high in the middle and low around. Its bottom surface slopes toward the middle with a slope of not less than 5‰, so that the leaked electrolyte can flow to the electrolyte outlet pipe. The leaked electrolyte collection tank should have good airtightness and the material should be resistant to acid corrosion. One end of the electrolyte outlet pipe is connected to the leaked electrolyte collection tank, and the other end is led out of the power container and led to the accident collection pool of the energy storage power station through a transmission pipeline. The outlet direction of the electrolyte outlet pipe should be located on the pipeline side of the power container, and the overall layout should be coordinated with the electrolyte transmission pipeline.

[0013] Compared with the prior art, the technical effect of the present invention is that the present invention is provided with a movable fuel cell stack, and no longer relies on a dedicated forklift for the fuel cell stack. The maintenance road only requires workers to pass through manually, thereby reducing the width of the maintenance road. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention.

[0015] Figure 2 It is an enlarged schematic diagram of the slidable component.

[0016] Figure 3 It is a side view schematic diagram of a single battery stack.

[0017] Figure 4 It is a schematic diagram of the equipment layout of the fuel cell stack support structure.

[0018] Figure 5 It is a schematic diagram of the equipment layout of the battery stack support structure in the prior art. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

[0020] like Figure 1-2 A slidable stack module support structure for a flow battery comprises a power container fixed on a main support bottom beam 1, the power container comprises a frame formed by fixing a main support vertical beam 2 and a stack load-bearing bottom beam 3 together, a plurality of main support vertical beams 2 are fixed to the edges of both sides of the main support bottom beam 1, a plurality of parallel stack load-bearing bottom beams 3 are arranged above the main support bottom beam 1, the edges of the stack load-bearing bottom beams 3 are fixed on the main support vertical beam 2, which divides the space above the main support bottom beam 1 into a plurality of stack spaces, and a stack 4 is arranged in each stack space.

[0021] The main support bottom beam 1, the main support vertical beam 2, and the stack load-bearing bottom beam 3 are fixed together by welding of an integrated structure.

[0022] The main support bottom beam 1 also serves as the bottom support frame of the power container, and is a welded integral structure with the power container. The main support vertical beam 2 is rooted on the main support bottom beam 1, and is also welded to the main support bottom beam 1. The main support vertical beam 2 also serves as the supporting structural beam of the wall panels around the power container. The battery stack load-bearing bottom beam 3 is welded and fixed on the main support vertical beam 2. The number of battery stack load-bearing bottom beams 3 is determined by the number of battery stack layers arranged in the vertical direction in the power container. It can be seen that the main support bottom beam 1 is the main load-bearing beam of the power container. When determining the model of the main support bottom beam 1, it is necessary to comprehensively consider the weight Q1 of the battery stack, the weight Q2 of the container shell, the main support vertical beam Q3 and the weight Q4 of the battery stack load-bearing bottom beam 3, and the weight Q5 of the electrolyte pipeline and the connecting cable between the battery stack must also be considered. The total load is ΣQ1-Q5.

[0023] like Figure 1-2 As shown, the battery stack 4 is placed on the battery stack load-bearing bottom beam 3, and a slidable component 9 of a slidable battery stack module support structure is provided between the battery stack 4 and the battery stack load-bearing bottom beam 3. The slidable component 9 is used for the battery stack 4 to slide on the battery stack load-bearing bottom beam 3.

[0024] like Figure 1-2 As shown, the slidable component 9 includes a slidable component upper groove 91, a slidable component lower groove 93 and a rolling component 95. The bottom of the battery stack 4 body includes a load-bearing beam and a battery stack outer supporting bottom beam 8. The slidable component upper groove 91 is fixed to the lower side of the load-bearing beam and the battery stack outer supporting bottom beam 8. The upper surface of the battery stack load-bearing bottom beam 3 is fixed to the slidable component lower groove 93. The slidable component upper groove 91 corresponds to the slidable component lower groove 93 up and down, and the rolling component 95 is rotatably connected to the slidable component upper groove 91 or the slidable component lower groove 93.

[0025] It is a slidable component 9 of a slidable battery stack module support structure. The slidable component upper groove 91 of the slidable component 9 and the battery stack outer support bottom beam 8 are an integrated structure. When the battery stack 4 is inspected, it is moved out simultaneously with the battery stack 4.

[0026] like Figure 1-2 As shown, the lower groove 93 of the slidable component and the load-bearing bottom beam 3 of the battery stack are an integrated structure, and the battery stack 4 remains in the power container when it is moved out.

[0027] like Figure 1-2As shown, upper groove limiting angle steels 92 are welded and fixed at the two inner upper feet of the upper groove 91 of the sliding component. The inclination angle of the upper groove limiting angle steel 92 is welded and fixed at 45°-60°. The two upper groove limiting angle steels 92 are symmetrically arranged in the upper groove 91 of the sliding component to form a guide groove for stable sliding of the rolling component; lower groove limiting angle steels 94 are also symmetrically welded and fixed in the lower groove 92 of the sliding component to form a guide groove for stable sliding of the rolling component. The rolling component 95 is fixed in the lower groove 92 of the sliding component by the bearing 96 of the rolling component. Only when the battery stack 4 moves outward, the rolling component 95 rotates around the bearing 96 of the rolling component. Therefore, when the battery stack 4 moves outward, it is only affected by the rolling friction of the component 95, which greatly reduces the drag load.

[0028] like Figure 1 As shown, for the sake of stability, the space between the battery stack 4 and the battery stack load-bearing bottom beam 3 above it is the upper space 72 of the battery stack main support, and the space between the battery stack 4 and the battery stack load-bearing bottom beam 3 below it is the lower space 71 of the battery stack main support. The battery stack 4 is connected to one end of the electrolyte delivery pipeline 6, and one end of the electrolyte delivery pipeline 6 is coiled through the lower space 71 of the battery stack main support or the upper space 72 of the battery stack main support, and then led out of the power container and connected to the electrolyte storage tank.

[0029] like Figure 1 As shown, for convenience, a stack towing hook 5 is fixed to the maintenance side of the outer supporting bottom beam 8 of the stack, and at least two stack towing hooks 5 are provided for one stack to ensure that the stack 4 is stable during the removal process.

[0030] like Figure 3 As shown, a leaked electrolyte collection tank 10 is provided at the bottom of the main support bottom beam 1 , and the lowest point of the bottom plate of the leaked electrolyte collection tank 10 is connected to one end of an electrolyte outlet pipe 11 .

[0031] like Figure 3 As shown, the bottom plate of the leaked electrolyte collection tank 10 is high in the middle and low around, and its bottom surface slopes toward the middle with a slope of not less than 5‰, so that the leaked electrolyte can flow to the electrolyte outlet pipe 11. The leaked electrolyte collection tank 10 should have good airtightness, and the material should be resistant to acid corrosion. One end of the electrolyte outlet pipe 11 is connected to the leaked electrolyte collection tank 10, and the other end is led out of the power container and led to the accident collection pool of the energy storage power station through a transmission pipeline. The outlet direction of the electrolyte outlet pipe 11 should be located on the pipeline side of the power container, and the overall layout is coordinated with the electrolyte transmission pipeline.

[0032] like Figure 5As shown, the equipment layout diagram of the existing power container using a conventional battery stack support structure, according to the maintenance trolley requirements, the width of the maintenance channel 800 reserved on the battery stack side of the power container is 3.0 meters, the energy storage power station covers an area of ​​48.5×17.5 meters, the power station capacity is 15MWh, and the energy density is 17.67kWh / ㎡.

[0033] like Figure 4 When the present invention adopts a slidable stack module support structure for a liquid flow battery, the maintenance of the stack no longer requires a professional maintenance cart. The width of the maintenance channel 800 reserved on the side of the power container stack only needs to be 1.2 meters for normal maintenance by personnel. The energy storage power station covers an area of ​​51.5×17.5 meters, the power station capacity is 18MWh, the energy density is 19.97kWh / ㎡, and the energy density is increased by 13%. The larger the scale of the energy storage power station, the more obvious the improvement in the capacity density per unit area. When it is difficult to increase the energy density of the electrolyte itself, it provides good conditions for the promotion of liquid flow batteries.

[0034] For other contents, please refer to the prior art.

[0035] The above description is only the preferred implementation mode of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A slidable stack module support structure for a flow battery, comprising a power container fixed on a main support bottom beam (1), the power container comprising a frame formed by fixing a main support vertical beam (2) and a stack load-bearing bottom beam (3) together, a plurality of main support vertical beams (2) are fixed to the edges of both sides of the main support bottom beam (1), a plurality of parallel stack load-bearing bottom beams (3) are arranged above the main support bottom beam (1), the edges of the stack load-bearing bottom beams (3) are fixed on the main support vertical beam (2), the space above the main support bottom beam (1) is divided into a plurality of stack spaces, a stack (4) is arranged in each stack space, and the structure is characterized in that: The cell stack (4) is placed on the cell stack load-bearing bottom beam (3), and a slidable component (9) of a slidable cell stack module support structure is provided between the cell stack (4) and the cell stack load-bearing bottom beam (3). The slidable component (9) is used for the cell stack (4) to slide on the cell stack load-bearing bottom beam (3).

2. The slidable stack module support structure of a flow battery according to claim 1, characterized in that: The main frame bottom beam (1), the main frame vertical beam (2) and the stack load-bearing bottom beam (3) are fixed to each other by welding of an integrated structure.

3. The slidable stack module support structure of a flow battery according to claim 2, characterized in that: The slidable component (9) comprises a slidable component upper groove (91), a slidable component lower groove (93) and a rolling component (95); the bottom of the battery stack (4) body comprises a load-bearing beam battery stack outer supporting bottom beam (8); the slidable component upper groove (91) is fixed to the lower side of the load-bearing beam battery stack outer supporting bottom beam (8); the upper surface of the battery stack load-bearing bottom beam (3) is fixed to the slidable component lower groove (93); the slidable component upper groove (91) corresponds to the slidable component lower groove (93) in upper and lower directions; and the rolling component (95) is rotatably connected to the slidable component upper groove (91) or the slidable component lower groove (93).

4. The slidable stack module support structure of a flow battery according to claim 3, characterized in that: Upper groove limiting angle steels (92) are welded and fixed at two inner upper feet of the upper groove (91) of the slidable component. The upper groove limiting angle steels (92) are welded and fixed at an inclination angle of (45)°-(60)°. The two upper groove limiting angle steels (92) are symmetrically arranged in the upper groove (91) of the slidable component to form a guide groove for stabilizing the sliding of the rolling component. Lower groove limiting angle steels (94) are also symmetrically welded and fixed in the lower groove (92) of the slidable component to form a guide groove for stabilizing the sliding of the rolling component. The rolling component (95) is fixed in the lower groove (92) of the slidable component through a bearing (96) of the rolling component.

5. The slidable stack module support structure of a flow battery according to claim 4, characterized in that: The space between the cell stack (4) and the cell stack load-bearing bottom beam (3) above it is the cell stack main support upper space (72), and the space between the cell stack (4) and the cell stack load-bearing bottom beam (3) below it is the cell stack main support lower space (71). The cell stack (4) is connected to one end of an electrolyte delivery pipeline (6), and one end of the electrolyte delivery pipeline (6) is coiled through the cell stack main support lower space (71) or the cell stack main support upper space (72), led out of the power container, and then connected to the electrolyte storage tank.

6. The slidable stack module support structure of a flow battery according to claim 5, characterized in that: A cell stack towing hook (5) is fixed on the maintenance side of the cell stack outer supporting bottom beam (8), and at least two cell stack towing hooks (5) are provided for one cell stack.

7. The slidable stack module support structure of a flow battery according to claim 6, characterized in that: A leaked electrolyte collection tank (10) is provided at the bottom of the main frame bottom beam (1), and the lowest point of the bottom plate of the leaked electrolyte collection tank (10) is connected to one end of an electrolyte outlet pipe (11).

8. The slidable stack module support structure of a flow battery according to claim 7, characterized in that: The bottom plate of the leaked electrolyte collection tank (10) is high in the middle and low around the edges, and its bottom surface slopes toward the middle at a slope of not less than 5‰, so that the leaked electrolyte can flow to the electrolyte outlet pipe (11). One end of the electrolyte outlet pipe (11) is connected to the leaked electrolyte collection tank (10), and the other end is led out of the power container.

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