A flow battery stack fixation structure and test system

Abstract

The utility model discloses a kind of liquid flow battery stack fixing structure and test system, liquid flow battery stack fixing structure is configured in connection test cabinet and liquid flow battery stack, the inside of test cabinet is hollow, and one side is open, comprising: placing plate and fixed assembly, placing plate is slidably connected in test cabinet through opening, and with the first state of sliding into test cabinet and the second state of sliding out test cabinet, fixed assembly includes fixed seat, clamping piece and at least one connecting piece, fixed seat is connected to placing plate, clamping piece is spaced apart from fixed seat, and is slidably connected to placing plate, and the clamping gap for clamping liquid flow battery stack is formed between clamping piece and fixed seat, connecting piece is connected to fixed seat and clamping piece, and with liquid flow battery stack detachably connected.The utility model can effectively solve the problem that short and small clamping plate arranged on both sides of liquid flow battery stack cannot effectively fix liquid flow battery stack, leading to unstable connection of liquid flow battery stack and placing platform.

Description

Technical Field

[0001] This utility model relates to the field of flow battery testing technology, specifically to a flow battery stack fixing structure and testing system. Background Technology

[0002] To facilitate industrial testing of flow battery stacks, related testing devices or systems have emerged.

[0003] For example, Chinese utility model patent CN222979642U, entitled "A Multifunctional Zinc-Bromine Flow Battery Stack Testing Device," includes a test cabinet and a placement platform. A base is installed inside the test cabinet, and a second double-threaded screw is movably installed inside the base. A slider is threaded onto the outer sides of both ends of the second double-threaded screw. The tops of the two sliders extend out of the base, and a support rod is movably fitted onto the top of each slider. A sleeve rod is welded to both sides of the bottom of the placement platform, and one end of the support rod is movably fitted onto the outer side of the sleeve rod. This device extends the placement platform out of the test cabinet, allowing operators to easily place the battery stack on top of the platform. Then, by rotating the output of a second motor, the platform, along with the battery stack mounted on top, is retracted into the test cabinet for testing, facilitating the operator's handling and placement of the battery stack.

[0004] However, the above structure only uses short clamps on both sides of the flow battery stack to fix the flow battery stack, which leads to unstable installation when the placement platform and the battery installed on top slide relative to the test cabinet. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a flow battery stack fixing structure and testing system to solve the technical problem in the prior art that the short clamps set on both sides of the flow battery stack cannot effectively fix the flow battery stack when it slides relative to the test cabinet with the placement plate, resulting in unstable connection between the flow battery stack and the placement platform.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a flow battery stack fixing structure, configured to connect a test cabinet and a flow battery stack. The test cabinet is hollow inside and open on one side, comprising: The placement plate is slidably connected to the test cabinet through the opening, and has a first state of sliding into the test cabinet and a second state of sliding out of the test cabinet; and The fixing assembly includes a fixing base, a clamping member, and at least one connecting member. The fixing base is connected to the placement plate. The clamping member is spaced apart from the fixing base and slidably connected to the placement plate. The clamping member and the fixing base form a clamping gap for clamping the flow battery stack. The connecting member is connected to the fixing base and the clamping member and is detachably connected to the flow battery stack.

[0007] In some embodiments, the clamping member includes a clamping block and a first driving part. The clamping block is disposed relative to the fixed base and slidably connected to the placement plate. The first driving part is connected to the placement plate and the clamping block and is used to drive the clamping block closer to or away from the placement plate.

[0008] In some embodiments, the clamping block has a first wedge-shaped surface on the side opposite to the fixed base. The first driving part includes a fixed bracket and a movable block. The fixed bracket is arranged perpendicular to the placement plate and connected to the placement plate. The fixed bracket has a first sliding groove along its setting direction. One end of the movable block is slidably embedded in the fixed bracket, and the other end abuts against the clamping block. It also has a second wedge-shaped surface that cooperates with the first wedge-shaped surface. The movable block slides close to the placement plate along the setting direction of the fixed bracket to push the clamping block closer to or away from the placement plate.

[0009] In some embodiments, the fixed bracket further has a receiving cavity communicating with the first sliding groove, the movable block has a threaded hole, the first driving part further includes a screw and a first driving motor, one end of the screw is threadedly connected to the threaded hole and rotatably connected to the inner wall of the receiving cavity, the fixed end of the first driving motor is connected to the inner wall of the receiving cavity, and the output shaft is connected to the other end of the screw.

[0010] In some embodiments, the first drive unit further includes at least one spring disposed between the fixed bracket and the clamping block, and connected to the fixed bracket and the clamping block.

[0011] In some embodiments, the flow battery stack has at least one mounting hole, and the connector includes two fixing blocks, a connecting rod, and at least two fixing nuts. The two fixing blocks are arranged opposite to each other and are respectively connected to the fixing base or the clamping block. The two fixing blocks have through holes opposite to the mounting hole. The two ends of the connecting rod are respectively provided with external threads and pass through the two through holes. The two fixing nuts are respectively threaded to the two ends of the connecting rod and abut against the two fixing blocks.

[0012] In some embodiments, the fixing base and the clamping block are respectively provided with a second sliding groove, and one end of the fixing block is slidably embedded in the second sliding groove.

[0013] In some embodiments, the number of connectors in the fixing assembly is two, the two fixing blocks are spaced apart from each other, and both are slidably connected to the fixing base or clamping block.

[0014] In some embodiments, the flow battery stack fixing structure further includes a connecting assembly, which includes two racks, two drive gears, a connecting shaft, and a second drive motor. The two racks are spaced apart from each other and are both connected to the placement plate. The drive gears are arranged in a one-to-one correspondence with the racks and mesh with each other. The connecting shaft is coaxial with both drive gears and is connected to both drive gears. The fixed end of the second drive motor is connected to the test cabinet, and the output shaft is connected to the connecting shaft, for driving the placement plate to slide relative to the test cabinet.

[0015] Secondly, this utility model also provides a flow battery stack testing system, including a test cabinet and the flow battery stack fixing structure as described above.

[0016] Compared with the prior art, the beneficial effects of the flow battery stack fixing structure and testing system provided by this utility model include: the placement plate is slidably connected to the test cabinet and has a first state of sliding into the test cabinet and a second state of sliding out of the test cabinet, which is used to facilitate the placement and removal of the flow battery stack; the clamping member is slidably connected to the fixing base and forms a clamping gap between the clamping member and the fixing base for clamping the flow battery stack; the connecting member is connected to the fixing base and the clamping member and is detachably connected to the flow battery stack. Compared to existing technologies, this invention uses clamping components that can slide relative to the fixed base to clamp and fix the flow battery stack. It also utilizes a detachable connector to the flow battery stack, and the connection between the connector, the fixed base, and the clamping components restricts the flow battery stack, improving the connection stability between the flow battery stack and the placement plate. This prevents relative sliding between the flow battery stack and the placement plate, solving the technical problem in existing technologies where the short clamps on both sides of the flow battery stack cannot effectively fix the flow battery stack when it slides relative to the test cabinet with the placement plate, leading to unstable connection between the flow battery stack and the placement platform. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a flow battery stack fixing structure and testing system provided in an embodiment of this utility model; Figure 2 This is a cross-sectional view of a flow battery stack fixing structure connected to the flow battery stack according to an embodiment of the present invention; Figure 3 This is a cross-sectional view from another perspective of a flow battery stack fixing structure and testing system provided in one embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures: Test cabinet 100; flow battery stack 200; placement plate 300; fixing assembly 400; fixing base 410; clamping component 420; clamping gap 423; clamping block 421; first drive unit 422; fixed bracket 4221; movable block 4222; screw 4223; first drive motor 4224; spring 4225; connector 430; fixing block 431; connecting rod 432; fixing nut 433; connecting assembly 500; rack 510; drive gear 520; connecting shaft 530; second drive motor 540. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem of unstable connection between the flow battery stack 200 and the placement platform caused by the inability of the short clamps on both sides of the flow battery stack 200 to effectively fix the flow battery stack 200 when it slides relative to the test cabinet 100 along with the placement plate 300, this utility model provides a flow battery stack fixing structure and testing system. This system enables the clamping and fixing of the flow battery stack 200 by allowing the clamping member 420 to slide relative to the fixing base 410. Simultaneously, the detachable connection between the connecting member 430 and the flow battery stack 200, and the connection between the connecting member 430 and the fixing base 410 and clamping member 420, restricts the flow battery stack 200, improves the connection stability between the flow battery stack 200 and the placement plate 300, and prevents relative sliding between the flow battery stack 200 and the placement plate 300.

[0021] Please see Figures 1 to 3 , Figure 1 , Figure 3This is a schematic diagram of a flow battery stack fixing structure and testing system according to an embodiment of the present invention. The flow battery stack fixing structure is configured to connect a test cabinet 100 and a flow battery stack 200. The test cabinet 100 is hollow inside and has an opening on one side, including a placement plate 300 and a fixing component 400. The placement plate 300 is slidably connected to the test cabinet 100 through the opening and has a first state of sliding into the test cabinet 100 and a second state of sliding out of the test cabinet 100. The fixing component 400 includes a fixing base 410, a clamping member 420 and at least one connecting member 430. The fixing base 410 is connected to the placement plate 300. The clamping member 420 is spaced apart from the fixing base 410 and slidably connected to the placement plate 300. The clamping member 420 and the fixing base 410 together form a clamping gap 423 for clamping the flow battery stack 200. The connecting member 430 is connected to the fixing base 410 and the clamping member 420 and is detachably connected to the flow battery stack 200.

[0022] In this device, compared to the prior art, the clamping member 420 can slide relative to the fixed base 410 to clamp and fix the flow battery stack 200. At the same time, the connector 430 is detachably connected to the flow battery stack 200. The connection between the connector 430 and the fixed base 410 and the clamping member 420 restricts the flow battery stack 200, improves the connection stability between the flow battery stack 200 and the placement plate 300, and avoids relative sliding between the flow battery stack 200 and the placement plate 300. This solves the technical problem in the prior art where the short clamps on both sides of the flow battery stack 200 cannot effectively fix the flow battery stack 200 when it slides relative to the test cabinet 100 along with the placement plate 300, resulting in unstable connection between the flow battery stack 200 and the placement platform.

[0023] Furthermore, in this device, the user fixes the flow battery stack 200 onto the placement plate 300. The placement plate 300 has a first state and a second state, allowing the flow battery stack 200 to be internally housed in the test cabinet 100 for measurement, and also externally housed for easy access. The test cabinet 100 is also equipped with a testing instrument for testing the flow battery stack 200. This is a conventional setup known to those skilled in the art; reference can be made to Chinese Utility Model Patent Publication No. CN222979642U, entitled "A Multifunctional Zinc-Bromine Flow Battery Stack 200 Testing Device," which will not be elaborated upon here.

[0024] In this embodiment, as Figures 1 to 3As shown, the clamping member 420 includes a clamping block 421 and a first driving part 422. The clamping block 421 is disposed relative to the fixed base 410 and is slidably connected to the placement plate 300. The first driving part 422 is connected to the placement plate 300 and the clamping block 421 and is used to drive the clamping block 421 to move closer to or away from the placement plate 300.

[0025] The clamping block 421 is spaced apart from the fixing base 410, and the clamping block 421 is slidably connected to the placement plate 300 to form an adjustable clamping gap 423. Under the drive of the first driving part 422, the clamping block 421 can slide close to the fixing base 410 and abut against the flow battery stack 200, so that the flow battery stack 200 is fixed in the clamping gap 423.

[0026] In some embodiments, the placement plate 300 is provided with a guide groove, one end of the guide block is slidably embedded in the guide groove, and the other end is connected to the clamping block 421 to realize the sliding connection between the clamping block 421 and the placement plate 300.

[0027] Furthermore, in order to improve the stability of the relative sliding between the clamping block 421 and the placement plate 300, the guide block is in an inverted "T" shape, which will not be described in detail here.

[0028] In one embodiment, please refer to Figure 2 The clamping block 421 has a first wedge-shaped surface on the side opposite to the fixed base 410. The first driving part 422 includes a fixed bracket 4221 and a movable block 4222. The fixed bracket 4221 is set perpendicular to the placement plate 300 and connected to the placement plate 300. The fixed bracket 4221 has a first sliding groove along its setting direction. One end of the movable block 4222 is slidably embedded in the fixed bracket 4221 and the other end abuts against the clamping block 421. It also has a second wedge-shaped surface that cooperates with the first wedge-shaped surface. The movable block 4222 slides close to the placement plate 300 along the setting direction of the fixed bracket 4221 to push the clamping block 421 closer to or away from the placement plate 300.

[0029] By using the sliding of the movable block 4222 relative to the fixed bracket 4221, the contact surface of the first wedge surface and the second wedge surface is adjusted. As the movable block 4222 moves closer to the placement plate 300, the movable block 4222 can continuously push the clamping block 421 closer to the fixed seat 410 to achieve clamping of the flow battery stack 200.

[0030] Furthermore, in order to reduce the sliding friction between the first wedge surface and the second wedge surface, steel balls or rollers can be provided on the first wedge surface and the second wedge surface, which will not be elaborated here.

[0031] In one embodiment, please refer to Figure 2 , Figure 3The fixed bracket 4221 is also provided with a receiving cavity that communicates with the first slide groove. The movable block 4222 is provided with a threaded hole. The first drive part 422 also includes a screw 4223 and a first drive motor 4224. One end of the screw 4223 is threaded to the threaded hole and rotatably connected to the inner wall of the receiving cavity. The fixed end of the first drive motor 4224 is connected to the inner wall of the receiving cavity, and the output shaft is connected to the other end of the screw 4223.

[0032] By utilizing the threaded holes on the screw 4223 and the movable block 4222, a linear drive structure similar to a ball screw and nut pair is formed, thereby enabling the movable block 4222 to slide relative to the fixed bracket 4221.

[0033] Furthermore, the first drive motor 4224 here is a common and readily available servo motor on the market, capable of rotating in either the forward or reverse direction. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0034] In some embodiments, the movable block 4222 can also be directly connected to the telescopic end of the push rod motor, hydraulic cylinder and pneumatic cylinder. The telescopic end of the push rod motor, hydraulic cylinder and pneumatic cylinder moves relative to its fixed end, which can drive the movable block 4222 to slide relative to the fixed bracket 4221.

[0035] In one embodiment, please refer to Figure 2 The first drive unit 422 also includes at least one spring 4225, which is disposed between the fixed bracket 4221 and the clamping block 421 and connected to the fixed bracket 4221 and the clamping block 421.

[0036] The elastic restoring force generated by the spring 4225 drives the clamping block 421 to slide away from the fixed base 410, thereby releasing the flow battery stack 200.

[0037] In this embodiment, the flow battery stack 200 has at least one mounting hole. The connector 430 includes two fixing blocks 431, a connecting rod 432, and at least two fixing nuts 433. The two fixing blocks 431 are arranged opposite each other and are respectively connected to the fixing base 410 or the clamping block 421. The two fixing blocks 431 have through holes opposite the mounting hole. The two ends of the connecting rod 432 are respectively provided with external threads and pass through the two through holes. The two fixing nuts 433 are respectively threaded to the two ends of the connecting rod 432 and abut against the two fixing blocks 431 respectively.

[0038] The flow battery stack 200 forms a stable connection structure with the clamping block 421 and the fixing base 410 through two fixing blocks 431, connecting rod 432 and at least two fixing nuts 433.

[0039] Furthermore, by using the connecting rod 432 to pass through the mounting hole on the flow battery stack 200, a detachable connection is made between the connecting rod 432 and the flow battery stack 200. The two ends of the connecting rod 432 are respectively connected to the fixing block 431 through the fixing nut 433.

[0040] In one embodiment, please refer to Figure 1 , Figure 2 The fixing base 410 and the clamping block 421 are respectively provided with second sliding grooves, and one end of the fixing block 431 is slidably embedded in the second sliding groove.

[0041] A second sliding groove is provided to achieve a sliding connection between the fixing block 431 and the fixing seat 410 or the clamping block 421, which is adapted to different flow battery stacks 200.

[0042] In one embodiment, please refer to Figure 2 The number of connectors 430 in the fixing component 400 is two, and the two fixing blocks 431 are arranged at intervals and are slidably connected to the fixing base 410 or the clamping block 421.

[0043] By setting two sets of fixing members spaced apart along the height direction, the connection stability between the flow battery stack 200 and the clamping block 421 and the fixing base 410 can be improved.

[0044] Furthermore, two fixing blocks 431 are respectively provided at intervals in the second slide groove located on the clamping block 421 or the fixing seat 410.

[0045] In this embodiment, the flow battery stack fixing structure further includes a connecting component 500. The connecting component 500 includes two racks 510, two drive gears 520, a connecting shaft 530, and a second drive motor 540. The two racks 510 are spaced apart from each other and are both connected to the placement plate 300. The drive gears 520 are arranged in a one-to-one correspondence with the racks 510 and mesh with each other. The connecting shaft 530 is coaxial with both drive gears 520 and is connected to both drive gears 520. The fixed end of the second drive motor 540 is connected to the test cabinet 100, and the output shaft is connected to the connecting shaft 530, which is used to drive the placement plate 300 to slide relative to the test cabinet 100.

[0046] The placement plate 300 and the cabinet of the test cabinet 100 are slidably connected by two racks 510, two drive gears 520, a connecting shaft 530 and a second drive motor 540.

[0047] Furthermore, the second drive motor 540 here is a common and readily available servo motor on the market, capable of rotating in the forward or reverse direction. This is a conventional setting known to those skilled in the art and will not be described in detail here. The forward or reverse rotation of the second drive motor 540 can respectively push the rack 510 and the placement plate 300 to slide relative to the test cabinet 100, thereby realizing the first state of sliding into the test cabinet 100 and the second state of sliding out of the test cabinet 100.

[0048] In addition, in some embodiments, the inner walls of the two opposite sides of the test cabinet 100 are provided with two limiting strips respectively. The two limiting strips are parallel to each other and spaced apart, and together form a guide groove for guiding the sliding of the placement plate 300.

[0049] In addition, in some embodiments, the opening of the test cabinet 100 is provided with at least one cabinet door, which is hinged to the test cabinet 100 by means of hinges or hinges, which will not be described in detail here.

[0050] In this embodiment, a flow battery stack testing system is also provided, including a test cabinet 100 and a flow battery stack fixing structure.

[0051] In this device, the user fixes the flow battery stack 200 onto the placement plate 300. The placement plate 300 has a first state and a second state, which allows the flow battery stack 200 to be built into the test cabinet 100 for measurement, and can also be placed externally on the flow battery stack 200 for easy access. The test cabinet 100 is also equipped with a tester for testing the flow battery stack 200. This is a conventional setup known to those skilled in the art and will not be described in detail here.

[0052] In addition, in some embodiments, the flow battery stack testing system of this application further includes a control component, which includes a PLC controller, a memory and a driver. The PLC controller is electrically connected to the first drive motor 4224 and the second drive motor 540 respectively, and is used to realize the automated and intelligent setting of the first drive motor 4224 and the second drive motor 540. Here, the PLC controller, memory and driver are conventional settings known to those skilled in the art, and will not be described in detail here.

[0053] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail below: The placement plate 300 is slidably connected to the test cabinet 100 and has a first state of sliding into the test cabinet 100 and a second state of sliding out of the test cabinet 100, for convenient handling of the flow battery stack 200. The clamping member 420 is slidably connected to the fixed base 410 and forms a clamping gap 423 between the clamping member 420 and the fixed base 410 for clamping the flow battery stack 200. The connecting member 430 is connected to the fixed base 410 and the clamping member 420 and is detachably connected to the flow battery stack 200. Compared to existing technologies, the clamping member 420 can slide relative to the fixed base 410 to clamp and fix the flow battery stack 200. At the same time, the connector 430 is detachably connected to the flow battery stack 200. The connection between the connector 430 and the fixed base 410 and the clamping member 420 restricts the flow battery stack 200, improves the connection stability between the flow battery stack 200 and the placement plate 300, and avoids relative sliding between the flow battery stack 200 and the placement plate 300.

[0054] In the specific workflow of this utility model, the user first drives the second drive motor 540. The forward or reverse rotation of the output shaft of the second drive motor 540 drives the drive gear 520 and the rack 510 to mesh, so that the placement plate 300 slides out relative to the test cabinet 100. Then, the user places the flow battery stack 200 to be tested into the clamping gap 423 and drives the first drive motor 4224 to drive the movable block 4222 to slide relative to the fixed bracket 4221, thereby pushing the clamping block 4222. 21. Push the flow battery stack 200 to be tested until it is pressed against the fixed base 410. Then, the user passes the connecting rod 432 through the mounting hole of the flow battery stack 200 to be tested and connects it to both ends of the connecting rod 432 with the fixing nut 433 to achieve abutment with the fixing block 431. Finally, the second drive motor 540 drives the drive gear 520 and the rack 510 to mesh, so that the placement plate 300 slides into the test cabinet 100 and the test can be started. The operation is simple and the connection is stable.

[0055] The present application provides the above structure, which can solve the technical problem in the prior art that the short clamps set on both sides of the flow battery stack 200 cannot effectively fix the flow battery stack 200 when it slides relative to the test cabinet 100 together with the placement plate 300, resulting in unstable connection between the flow battery stack 200 and the placement platform.

[0056] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A flow battery stack fixing structure, configured to connect a test cabinet and a flow battery stack, wherein the test cabinet is hollow inside and open on one side, characterized in that, include: The placement plate is slidably connected to the test cabinet through the opening, and has a first state of sliding into the test cabinet and a second state of sliding out of the test cabinet; as well as The fixing assembly includes a fixing base, a clamping member, and at least one connecting member. The fixing base is connected to the placement plate. The clamping member is spaced apart from the fixing base and slidably connected to the placement plate. The clamping member and the fixing base form a clamping gap for clamping the flow battery stack. The connecting member is connected to the fixing base and the clamping member and is detachably connected to the flow battery stack.

2. The flow battery stack fixing structure according to claim 1, characterized in that, The clamping member includes a clamping block and a first driving part. The clamping block is disposed relative to the fixed base and slidably connected to the placement plate. The first driving part is connected to the placement plate and the clamping block and is used to drive the clamping block to move closer to or away from the placement plate.

3. The flow battery stack fixing structure according to claim 2, characterized in that, The clamping block has a first wedge-shaped surface on the side opposite to the fixed base. The first driving part includes a fixed bracket and a movable block. The fixed bracket is arranged perpendicular to the placement plate and connected to the placement plate. The fixed bracket has a first sliding groove along its setting direction. One end of the movable block is slidably embedded in the fixed bracket and the other end abuts against the clamping block. It also has a second wedge-shaped surface that cooperates with the first wedge-shaped surface. The movable block slides close to the placement plate along the setting direction of the fixed bracket to push the clamping block closer to or away from the placement plate.

4. The flow battery stack fixing structure according to claim 3, characterized in that, The fixed bracket also has a receiving cavity that communicates with the first sliding groove. The movable block has a threaded hole. The first driving part also includes a screw and a first driving motor. One end of the screw is threaded to the threaded hole and rotatably connected to the inner wall of the receiving cavity. The fixed end of the first driving motor is connected to the inner wall of the receiving cavity, and the output shaft is connected to the other end of the screw.

5. The flow battery stack fixing structure according to claim 3, characterized in that, The first driving unit further includes at least one spring, which is disposed between the fixed bracket and the clamping block and connected to the fixed bracket and the clamping block.

6. The flow battery stack fixing structure according to claim 3, characterized in that, The flow battery stack has at least one mounting hole. The connector includes two fixing blocks, a connecting rod, and at least two fixing nuts. The two fixing blocks are arranged opposite each other and are respectively connected to the fixing base or the clamping block. The two fixing blocks have through holes opposite the mounting hole. The two ends of the connecting rod are respectively provided with external threads and pass through the two through holes. The two fixing nuts are respectively threaded to the two ends of the connecting rod and abut against the two fixing blocks.

7. The flow battery stack fixing structure according to claim 6, characterized in that, The fixing base and the clamping block are respectively provided with a second sliding groove, and one end of the fixing block is slidably embedded in the second sliding groove.

8. The flow battery stack fixing structure according to claim 7, characterized in that, The fixing assembly consists of two connectors, with the two fixing blocks spaced apart from each other and slidably connected to the fixing base or clamping block.

9. The flow battery stack fixing structure according to claim 1, characterized in that, The flow battery stack fixing structure also includes a connecting assembly, which includes two racks, two drive gears, a connecting shaft, and a second drive motor. The two racks are spaced apart from each other and are both connected to the placement plate. The drive gears are arranged one-to-one with the racks and mesh with each other. The connecting shaft is coaxial with both drive gears and is connected to both drive gears. The fixed end of the second drive motor is connected to the test cabinet, and the output shaft is connected to the connecting shaft, for driving the placement plate to slide relative to the test cabinet.

10. A flow battery stack testing system, characterized in that, It includes a test cabinet and a flow battery stack fixing structure as described in any one of claims 1-9.

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