End plate pressing component for assembling galvanic pile of flow battery

Abstract

The invention relates to the technical field of electrochemical energy storage, and discloses an end plate pressing component for assembling a galvanic pile of a flow battery, which comprises an upper pressing plate and a lower pressing plate, and is characterized in that the upper pressing plate and the lower pressing plate are connected through four connecting columns, the close sides of the upper pressing plate and the lower pressing plate are fixedly connected with feeding plates, and the feeding plates are connected with the connecting columns. The close sides of the two feeding plates are fixedly connected with a battery body, buckle assemblies are arranged on the upper side and the lower side of the interior of a connecting column and used for fixing an upper pressing plate and a lower pressing plate, and connecting assemblies are arranged on the close sides of the upper pressing plate and the lower pressing plate and used for fixing the upper pressing plate and the lower pressing plate. The connecting device is used for connecting the upper pressing plate and the upper end plate and connecting the lower pressing plate and the lower end plate. And through the positioning blocks and the buckle assemblies, modular assembly becomes more efficient and convenient. By means of the design, the tedious steps that workers need to adjust and install all the bolts one by one in the assembling process are effectively reduced, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of electrochemical energy storage, and in particular to an end plate pressing component for assembling a stack of a liquid flow battery. Background Art

[0002] The assembly of the flow battery stack is its core component process, which involves integrating multiple battery cells in a specific order and manner to ensure efficient energy conversion and stable operation of the battery. The stack is usually composed of components such as positive and negative electrodes, diaphragms, flow channels and end plates. Each battery cell includes positive and negative electrodes, electrolyte flow channels and diaphragms, while the flow channel plate is responsible for guiding the flow of electrolyte and optimizing the contact between the electrolyte and the electrodes. The battery cells are fixed and compressed by the end plate clamping member to ensure good contact and sealing between the various components, prevent leakage and reduce internal resistance. In the assembly of the flow battery stack, the end plate clamping member is an important component to ensure close contact between the internal components of the stack and the performance of the battery. Usually, the end plate is used to squeeze and fix the internal battery components, and mechanically apply pressure to maintain good sealing between the battery cells. Generally, the end plate is fixed and compressed by bolts around the upper and lower end plates. The clamping member can not only effectively prevent electrolyte leakage, but also reduce the internal resistance of the battery during operation and improve energy conversion efficiency.

[0003] In the prior art, in the end plate clamping components for flow battery stack assembly, the use of bolts to fix the end plate in a circle can effectively ensure the compression and sealing of the battery cell, but too many bolts will cause the following problems: a large number of bolts will increase the complexity of the assembly process, and workers will need to spend more time and energy to install and adjust each bolt, which reduces production efficiency. In addition, when too many bolts are used, the pressure applied will be uneven, especially if the bolts are not tightened in sequence or evenly, which may cause certain parts to be subjected to excessive pressure and cause damage to the battery cell. In addition, although the end plate is fixed and clamped by bolts, since the bolts are mainly distributed at the edge of the end plate, the end plate will often be deformed during the force application process, resulting in insufficient clamping force in the middle area, thereby causing the contact resistance of the internal center part to increase, thereby affecting the battery performance. For this reason, those skilled in the art have proposed an end plate clamping component for flow battery stack assembly to solve the above problems. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides an end plate clamping component for assembling a liquid flow battery stack, which solves the problem of using bolts to fix the end plate in a circle in the end plate clamping component for assembling a liquid flow battery stack in the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an end plate clamping member for assembling a stack of a flow battery, comprising an upper clamping plate and a lower clamping plate, characterized in that the upper clamping plate and the lower clamping plate are connected by four connecting columns, the adjacent sides of the upper end plate and the lower end plate are fixedly connected with a feed plate, and the adjacent sides of the two feed plates are fixedly connected with a battery body;

[0006] Buckle assemblies are provided on both upper and lower sides of the interior of the connecting column, which are used to fix the upper clamping plate and the lower clamping plate;

[0007] The upper pressing plate and the lower pressing plate are both provided with a connecting assembly on the adjacent side thereof, which is used to connect the upper pressing plate and the upper end plate with the lower pressing plate and the lower end plate;

[0008] Four limiting components are arranged inside the upper end plate and the lower end plate, which are used to limit and fix the side plates.

[0009] Preferably, the buckle assembly includes four installation slots, and the four installation slots are all opened inside the connecting column. Four springs are arranged inside the connecting column, one end of the spring is fixedly connected to the inner wall of the installation slot, and the other end of the spring is fixedly connected to a limiting block, the outer side of the limiting block is fixedly connected with a clamping block, and the inner side of the limiting block is fixedly connected with a pull rope, four clamping slots are opened inside the upper clamping plate, and the clamping slots match the outer side of the clamping block, the interior of the connecting column is rotatably connected with a rotating rod, and the top end of the rotating rod is fixedly connected with a knob.

[0010] Preferably, the connecting assembly on the upper side includes two electric push rods, which are fixedly connected to the left and right sides of the upper pressure plate, and the output end of the electric push rod is fixedly connected to a positioning block, and the front and rear sides of the upper pressure plate are fixedly connected to guide rods, and the front and rear sides of the positioning block are fixedly connected to guide blocks, a pressure sensor is arranged inside the positioning block, and position sensors are installed on the front and rear sides of the upper pressure plate, a positioning groove is opened inside the upper end plate, and a plurality of disc spring groups are fixedly connected to the bottom end of the upper pressure plate, and the pressure sensor and the position sensor transmit the collected data to the central control system.

[0011] Preferably, the upper end plate and the lower end plate are connected by connecting bolts, and a liquid inlet is provided on one side of the upper end plate and the lower end plate, and a liquid outlet is provided on the other side of the upper end plate and the lower end plate.

[0012] Preferably, the limit assembly includes a limit groove, which is opened inside the upper end plate, and a spring 2 is arranged inside the upper end plate, one end of the spring 2 is fixedly connected to the inner wall of the limit groove, and the other end of the spring 2 is fixedly connected to a limit block 2, and a protrusion is fixedly connected to the outer side of the limit block 2, and a groove is opened inside the side plate, and the inside of the groove matches the outside of the protrusion.

[0013] Preferably, one end of the pressure sensor is fixedly connected to the inner wall of the positioning block, and the other end of the pressure sensor is fixedly connected to the top end of the upper end plate.

[0014] Preferably, the interior of the guide block is slidably connected to the exterior of the guide rod, and the exterior of the positioning block is slidably connected to the interior of the positioning groove.

[0015] Preferably, the interior of the mounting groove is slidably connected to the exterior of the limiting block 1, the interior of the connecting column is slidably connected to the exterior of the pull rope, and the lower side of the rotating rod is fixedly connected to the adjacent side of the four pull ropes.

[0016] Preferably, the interior of the limiting groove is slidably connected to the exterior of the second limiting block, and the exterior of the protrusion is arc-shaped.

[0017] Preferably, the central control system includes:

[0018] The acquisition module is used to transmit the information collected by the pressure sensor and the position sensor to the central control system;

[0019] An analysis module, which is used to analyze the information collected in the central control system;

[0020] The drive module is used to drive the electric push rod according to the analyzed information.

[0021] Working principle: First, place the lower clamping plate, lower end plate, lower feed plate, battery body, upper feed plate, upper end plate and upper clamping plate in order from bottom to top. The positioning blocks on the upper and lower clamping plates match the positioning grooves of the upper and lower end plates, and multiple disc spring groups are welded at the connection between the upper and lower clamping plates and the upper and lower end plates.

[0022] Secondly, the upper clamping plate is connected to the lower clamping plate through the connecting column, so that the rotating rod can be driven to rotate by turning the knob, thereby driving the pull rope to move inward. This process will cause the limit block 1 to move accordingly, further driving the card block to move, and adjusting the upper and lower clamping plates to the appropriate position. Subsequently, the elastic action of the spring 1 causes the limit block to move outward and drives the card block into the card slot, thereby achieving a firm combination of the card block and the card slot, ensuring that the upper and lower clamping plates can apply sufficient pressure to the upper and lower end plates.

[0023] Next, use the connecting bolts to fix the upper end plate and the lower end plate, so that the side plate is aligned with the notches of the upper and lower end plates and spliced. At this time, the extrusion convex block moves inward, driving the limit block 2 to move with it. When the side plate moves to the appropriate position, the elastic action of the second spring causes the limit block 2 to move outward and drive the convex block into the groove, thereby achieving a firm combination of the convex block and the groove, ensuring that the side plate is effectively fixed, and completing the entire assembly process.

[0024] Finally, the position and pressure of the two positioning blocks are collected through pressure sensors and position sensors. When one side is offset or the pressure is too high, the collected data is transmitted to the central control system, and then transmitted to the drive module after analysis by the analysis module, thereby starting the operation of the electric push rod on one side, thereby driving the positioning block on one side to move, so that the positioning block can be adaptively adjusted.

[0025] The present invention provides an end plate clamping component for assembling a flow battery stack. The end plate clamping component has the following beneficial effects:

[0026] 1. The present invention makes modular assembly more efficient and convenient through positioning blocks and buckle assemblies. This design effectively reduces the tedious steps that workers need to adjust and install each bolt one by one during the assembly process, greatly improving work efficiency. In addition, the use of connecting columns and buckle assemblies between the upper and lower clamping plates not only significantly reduces the number of bolts required, but also further simplifies the overall assembly process. By reducing the number of components and assembly links, the present invention effectively reduces the complexity of assembly, thereby saving valuable time costs and improving production efficiency.

[0027] 2. The present invention ensures uniform distribution of force when applying pressure through the design of the disc spring group and the spring. The elastic effect of the second spring helps the side plate absorb the local uneven pressure. In addition, the coordinated movement of the rotating knob and the pull rope allows the pressure between the upper and lower clamping plates to be flexibly adjusted, thereby ensuring uniform distribution of pressure between each battery cell. This design not only improves the stability of the system, but also extends the service life of the battery and reduces potential failures caused by uneven pressure.

[0028] 3. The present invention makes the disassembly of the upper clamping plate and the lower clamping plate more efficient through the integrated rotation mechanism. Workers only need to turn the knob to easily loosen them without removing all the bolts one by one, and pull the side plate to squeeze the protrusion to move, so that the side plate can be easily removed, thereby reducing the risk of bolts being lost or damaged during maintenance, simplifying the subsequent maintenance process, and improving work efficiency.

[0029] 4. The present invention monitors the positioning block through pressure sensors and position sensors, and transmits the data to the central control system for analysis, thereby driving the adaptive adjustment of the electric push rod, which can significantly improve the safety, efficiency and reliability of the system, and also bring better experience and operational convenience to users. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A perspective view of the present invention;

[0031] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0032] Figure 3 It is a schematic diagram of the structure of the position sensor of the present invention;

[0033] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0034] Figure 5 It is a schematic diagram of the structure of the disc spring assembly of the present invention;

[0035] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0036] Figure 7 It is a schematic diagram of the upper end plate structure of the present invention;

[0037] Figure 8 for Figure 7 Enlarged view of point D

[0038] Fig. 9 It is a schematic diagram of the central control system of the present invention.

[0039] Among them, 1. upper clamping plate; 2. lower clamping plate; 3. connecting column; 4. buckle assembly; 401. mounting slot; 402. spring one; 403. limit block one; 404. block; 405. slot; 406. pull rope; 407. rotating rod; 408. knob; 5. connecting assembly; 501. electric push rod; 502. positioning block; 503. guide rod; 504. guide block; 505. pressure sensor; 506. position sensor; 507. positioning slot; 508. disc spring group; 6. upper end plate; 7. lower end plate; 8. feed plate; 9. battery body; 10. connecting bolt; 11. side plate; 12. limit assembly; 1201. limit slot; 1202. spring two; 1203. limit block two; 1204. protrusion; 1205. groove; 13. liquid inlet; 14. liquid outlet. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example:

[0042] Please refer to the attached Figure 1 -Attached Figure 8 An embodiment of the present invention provides an end plate clamping component for assembling a flow battery stack, comprising an upper clamping plate 1 and a lower clamping plate 2, wherein the upper clamping plate 1 and the lower clamping plate 2 are connected by four connecting columns 3, and the adjacent sides of the upper end plate 6 and the lower end plate 7 are fixedly connected with a feed plate 8, and the adjacent sides of the two feed plates 8 are fixedly connected with a battery body 9, the upper end plate 6 and the lower end plate 7 are connected by connecting bolts 10, and one side of the upper end plate 6 and the lower end plate 7 is provided with a liquid inlet 13, and the other side of the upper end plate 6 and the lower end plate 7 is provided with a liquid outlet 14, and the outer side of the upper end plate 6 and the lower end plate 7 is provided with a temperature sensor 15.

[0043] Specifically, the upper clamping plate 1 and the lower clamping plate 2 are respectively located at the top and bottom of the battery assembly, and the four connecting columns 3 are evenly distributed between the upper clamping plate 1 and the lower clamping plate 2 to play a role of fixing and clamping. The upper end plate 6 and one side of the lower end plate 7 are fixedly connected to the feed plate 8 for the inlet and outlet of liquid to ensure the circulation of electrolyte in the battery. The adjacent sides of the two feed plates 8 are fixedly connected to the battery body 9 to ensure the stability and sealing of the battery body 9 to avoid liquid leakage. The battery body 9 is a plurality of battery cells (including electrodes, diaphragms and flow channel plates) stacked together in a designed order. The basic structure of the battery stack is formed, and the upper end plate 6 and the lower end plate 7 are connected by connecting bolts 10 to ensure the tight connection between the upper and lower end plates. A liquid inlet 13 is provided on one side of the upper end plate 6 and the lower end plate 7 for injecting electrolyte, corresponding to the positive electrode and the negative electrode respectively. A liquid outlet 14 is provided on the other side of the upper end plate 6 and the lower end plate 7 for discharging electrolyte, corresponding to the positive electrode and the negative electrode respectively, to ensure the normal operation of the battery. A temperature sensor 15 is provided on the outside of the upper end plate 6 and the lower end plate 7 for real-time monitoring of the operating temperature of the battery to prevent overheating.

[0044] Please refer to the attached Figure 1 , Attachment Figure 3 and attached Figure 4, buckle assemblies 4 are provided on both upper and lower sides of the interior of the connecting column 3, which are used to fix the upper clamping plate 1 and the lower clamping plate 2, and the buckle assembly 4 includes four mounting grooves 401, and the four mounting grooves 401 are all opened inside the connecting column 3, and four springs 402 are provided inside the connecting column 3, one end of the spring 402 is fixedly connected to the inner wall of the mounting groove 401, and the other end of the spring 402 is fixedly connected to the limiting block 403, and the inside of the mounting groove 401 is slidably connected to the outside of the limiting block 403 Then, the outer side of the limit block 403 is fixedly connected with a clamping block 404, the inner side of the limit block 403 is fixedly connected with a pull rope 406, the inside of the connecting column 3 is slidably connected with the outside of the pull rope 406, four clamping grooves 405 are opened inside the upper clamping plate 1, the clamping grooves 405 match the outer side of the clamping block 404, the inside of the connecting column 3 is rotatably connected with a rotating rod 407, the lower side of the rotating rod 407 is fixedly connected to the adjacent side of the four pull ropes 406, and the top of the rotating rod 407 is fixedly connected with a knob 408.

[0045] Specifically, the interior of the connecting column is provided with a buckle assembly 4 on the upper and lower sides for fixing the upper clamping plate 1 and the lower clamping plate 2. The connecting column 3 provides a stable foundation to carry the upper clamping plate 1 and the lower clamping plate 2 and ensure their stability. The buckle assembly 4 includes four mounting grooves 401, which are respectively arranged on the inner side of the connecting column 3. A spring 402 is installed in each mounting groove 401 to facilitate elastic fixation of a limit block 403. The design of the mounting groove 401 allows the limit block 403 to slide within a certain range, thereby facilitating installation and disassembly. The outer portion of the limit block 403 is slidably connected to the inner wall of the mounting groove 401, and a clamping block 404 is fixed on one side to match the clamping groove 405 of the upper clamping plate 1 to achieve To fix the clamping plate, one end of a spring 402 is fixed to the inner wall of the mounting groove 401, and the other end is fixedly connected to a limit block 403, providing elastic force to ensure that the clamping plate does not loosen when under pressure. A clamping block 404 is arranged on the outer side of the limit block 403, and perfectly matches the clamping groove 405 of the upper clamping plate 1, ensuring that the two can be tightly combined. The rotating rod 407 is rotatably connected to the inside of the connecting column 3, and the lower side is fixedly connected to the adjacent side of the four pull ropes 406, so as to facilitate applying a rotational force to adjust the position of the limit block 403. The knob 408 is fixedly connected to the top of the rotating rod 407. The user can adjust the tightness of the pull rope 406 by rotating the knob 408, thereby achieving the fixation and release of the clamping plates 1 and 2.

[0046] Please refer to the attached Figure 2 , Attachment Figure 5 and attached Figure 6, the upper clamping plate 1 and the lower clamping plate 2 are both provided with a connecting assembly 5 on the adjacent side, which is used to connect the upper clamping plate 1 and the upper end plate 6 with the lower clamping plate 2 and the lower end plate 7, the upper connecting assembly 5 includes two electric push rods 501, the two electric push rods 501 are fixedly connected to the left and right sides of the interior of the upper clamping plate 1, the output end of the electric push rod 501 is fixedly connected to a positioning block 502, the front and rear sides of the interior of the upper clamping plate 1 are both fixedly connected to guide rods 503, the front and rear sides of the positioning block 502 are both fixedly connected to guide blocks 504, a pressure sensor 505 is provided inside the positioning block 502, the front and rear sides of the upper clamping plate 1 are both installed with position sensors 506, a positioning groove 507 is provided inside the upper end plate 6, and the bottom end of the upper clamping plate 1 is fixedly connected There are multiple disc spring groups 508, and the pressure sensor 505 and the position sensor 506 transmit the collected data to the central control system. One end of the pressure sensor 505 is fixedly connected to the inner wall of the positioning block 502, and the other end of the pressure sensor 505 is fixedly connected to the top of the upper end plate 6. The inside of the guide block 504 is slidably connected to the outside of the guide rod 503, and the outside of the positioning block 502 is slidably connected to the inside of the positioning groove 507. The central control system includes: a collection module, which is used to transmit the information collected by the pressure sensor 505 and the position sensor 506 to the central control system, an analysis module, which is used to analyze the information collected in the central control system, and a drive module, which is used to drive the electric push rod 501 according to the analyzed information.

[0047] Specifically, the design of the connecting component 5 is intended to ensure a stable connection between the upper clamping plate 1 and the lower clamping plate 2. By arranging the connecting component 5 between the upper clamping plate 1 and the upper end plate 6, the pressure can be effectively transmitted and the stability of the structure can be maintained. The electric push rod 501 is arranged on the left and right sides of the interior of the upper clamping plate 1. There are two electric push rods 501 in total. The output end of the electric push rod 501 is fixedly connected with a positioning block 502 to achieve a precise clamping function. The front and rear sides of the interior of the upper clamping plate 1 are fixedly connected with guide rods 503 to provide stable guiding support to ensure that the positioning block 502 maintains linear motion during the clamping process. The positioning block 502 is located at the output end of the electric push rod 501, and the front and rear sides are fixedly connected with guide blocks 504 to ensure the stability of the positioning block 502 during movement. The pressure sensor 505 is arranged inside the positioning block 502 and is responsible for real-time monitoring of the clamping force. One end of the pressure sensor is fixedly connected to the inner wall of the positioning block 502, and the other end is fixedly connected to the inner wall of the upper end plate 6. The top is fixedly connected to obtain accurate pressure data. Position sensors 506 are respectively installed on the front and rear sides of the upper clamping plate 1 to monitor the position changes of the positioning block 502 in real time and feed back to the central control system. A positioning slot 507 is provided inside the upper end plate 6. The outside of the positioning block 502 is slidably connected to the inside of the positioning slot 507 to ensure the stability and accuracy of the positioning block 502 during movement. A plurality of disc spring groups 508 are fixedly connected to the bottom end of the upper clamping plate 1 to provide necessary elastic support to ensure that external disturbances can be effectively resisted during the clamping process. The acquisition module is used to collect information from the pressure sensor 505 and the position sensor 506 and transmit the data to the central control system. The analysis module performs real-time analysis on the collected information to evaluate the battery status and the clamping effect. The drive module accurately drives the electric push rod 501 according to the analyzed information and adjusts the clamping force to ensure the optimal working state of the battery stack.

[0048] Please refer to the attached Figure 5 , Attachment Figure 7 and attached Figure 8 Four limit assemblies 12 are arranged inside the upper end plate 6 and the lower end plate 7, which are used to limit and fix the side plate 11. The limit assembly 12 includes a limit groove 1201, which is opened inside the upper end plate 6, and a spring 2 1202 is arranged inside the upper end plate 6. One end of the spring 2 1202 is fixedly connected to the inner wall of the limit groove 1201, and the other end of the spring 2 1202 is fixedly connected to a limit block 2 1203. The interior of the limit groove 1201 is slidably connected to the exterior of the limit block 2 1203, and the outer side of the limit block 2 1203 is fixedly connected with a protrusion 1204. A groove 1205 is opened inside the side plate 11, and the interior of the groove 1205 matches the exterior of the protrusion 1204, and the exterior of the protrusion 1204 is arranged in an arc shape.

[0049] Specifically, the limit groove 1201 is located inside the upper end plate 6 and is used to accommodate the limit block 1203. The design of the groove allows the limit block 1203 to slide freely in the groove, but is limited by the boundary of the groove. The spring 1202 is an elastic element. Its function is to provide thrust to keep the limit block 1203 always in contact. One end of the spring is fixed to the inner wall of the limit groove 1201, and the other end is fixedly connected to the limit block 1203 to ensure that during the movement of the side plate 11, the limit block 1203 is always thrust by the spring 1202, and the protrusion 1204 slides in the limit groove 1201. Its main function is to cooperate with the groove 1205 of the side plate 11. The protrusion on the outside of the limit block 1203 is arc-shaped, which can better match the groove 1205, and the arc shape makes the limit block 1203 move inward under compression.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An end plate clamping member for assembling a flow battery stack, comprising an upper clamping plate (1) and a lower clamping plate (2), characterized in that: The upper pressing plate (1) and the lower pressing plate (2) are connected via four connecting columns (3); the adjacent sides of the upper end plate (6) and the lower end plate (7) are fixedly connected to a feed plate (8); and the adjacent sides of the two feed plates (8) are fixedly connected to a battery body (9); Buckle assemblies (4) are provided on both upper and lower sides of the interior of the connecting column (3) for fixing the upper clamping plate (1) and the lower clamping plate (2); A connecting assembly (5) is provided on the adjacent side of the upper pressing plate (1) and the lower pressing plate (2), and is used to connect the upper pressing plate (1) and the upper end plate (6) with the lower pressing plate (2) and the lower end plate (7); Four limiting components (12) are arranged inside the upper end plate (6) and the lower end plate (7), and are used to limit and fix the side plates (11).

2. The end plate pressing member for assembling a flow battery stack according to claim 1, characterized in that: The buckle assembly (4) comprises four installation slots (401), and the four installation slots (401) are all opened inside the connecting column (3). Four springs (402) are arranged inside the connecting column (3), one end of the spring (402) is fixedly connected to the inner wall of the installation slot (401), and the other end of the spring (402) is fixedly connected to a limit block (403). The outer side of the limit block (403) is fixedly connected to a clamping block (404), and the inner side of the limit block (403) is fixedly connected to a pull rope (406). Four clamping slots (405) are opened inside the upper clamping plate (1), and the clamping slots (405) match the outer side of the clamping block (404). The interior of the connecting column (3) is rotatably connected to a rotating rod (407), and the top end of the rotating rod (407) is fixedly connected to a knob (408).

3. The end plate pressing member for assembling a flow battery stack according to claim 1, characterized in that: The connecting assembly (5) comprises two electric push rods (501), the two electric push rods (501) are fixedly connected to the left and right sides of the upper clamping plate (1), the output end of the electric push rod (501) is fixedly connected to a positioning block (502), the front and rear sides of the upper clamping plate (1) are fixedly connected to guide rods (503), the front and rear sides of the positioning block (502) are fixedly connected to guide blocks (504), a pressure sensor (505) is arranged inside the positioning block (502), the front and rear sides of the upper clamping plate (1) are installed with a position sensor (506), a positioning groove (507) is opened inside the upper end plate (6), and a plurality of disc spring groups (508) are fixedly connected to the bottom end of the upper clamping plate (1), and the pressure sensor (505) and the position sensor (506) transmit the collected data to the central control system.

4. The end plate pressing member for assembling a flow battery stack according to claim 1, characterized in that: The upper end plate (6) and the lower end plate (7) are connected via connecting bolts (10); one side of the upper end plate (6) and the lower end plate (7) are both provided with a liquid inlet (13); and the other side of the upper end plate (6) and the lower end plate (7) are both provided with a liquid outlet (14).

5. The end plate pressing member for assembling a flow battery stack according to claim 1, characterized in that: The limiting assembly (12) comprises a limiting groove (1201), wherein the limiting groove (1201) is provided inside the upper end plate (6), a second spring (1202) is arranged inside the upper end plate (6), one end of the second spring (1202) is fixedly connected to the inner wall of the limiting groove (1201), the other end of the second spring (1202) is fixedly connected to a second limiting block (1203), the outer side of the second limiting block (1203) is fixedly connected to a protrusion (1204), and a groove (1205) is provided inside the side plate (11), the inner part of the groove (1205) matches the outer part of the protrusion (1204).

6. The end plate pressing member for assembling a flow battery stack according to claim 3, characterized in that: One end of the pressure sensor (505) is fixedly connected to the inner wall of the positioning block (502), and the other end of the pressure sensor (505) is fixedly connected to the top end of the upper end plate (6).

7. The end plate pressing member for assembling a flow battery stack according to claim 3, characterized in that: The interior of the guide block (504) is slidably connected to the exterior of the guide rod (503), and the exterior of the positioning block (502) is slidably connected to the interior of the positioning groove (507).

8. The end plate pressing member for assembling a flow battery stack according to claim 2, characterized in that: The interior of the installation groove (401) is slidably connected to the exterior of the limit block (403), the interior of the connecting column (3) is slidably connected to the exterior of the pull rope (406), and the lower side of the rotating rod (407) is fixedly connected to the adjacent side of the four pull ropes (406).

9. The end plate pressing member for assembling a flow battery stack according to claim 5, characterized in that: The interior of the limiting groove (1201) is slidably connected to the exterior of the second limiting block (1203), and the exterior of the protrusion (1204) is arc-shaped.

10. The end plate pressing member for assembling a flow battery stack according to claim 3, characterized in that: The central control system comprises: A collection module, which is used to transmit the information collected by the pressure sensor (505) and the position sensor (506) to the central control system; An analysis module, which is used to analyze the information collected in the central control system; A driving module is used to drive the electric push rod (501) according to the analyzed information.

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