Vanadium redox flow battery stack and assembly method thereof

Abstract

The invention relates to the technical field of battery stacks, and discloses a vanadium redox flow battery stack and an assembling method thereof.The battery stack comprises a plurality of single battery series connection sets, an upper end plate and a lower end plate, pressing mechanisms are arranged outside the upper end plate and the lower end plate, and first connecting mechanisms are arranged on the outer walls of the pressing mechanisms; and an upper feeding plate and a lower feeding plate are installed on the upper side and the lower side of the single battery series connection set respectively, guide reinforcing mechanisms are arranged at the four corners of the outer portions of the single battery series connection set, the upper feeding plate and the lower feeding plate, and second connecting mechanisms are arranged at the four corners of the outer portions of the upper end plate and the lower end plate. Through the arrangement of the guide reinforcing shell, the guide groove, the guide rod and the guide plate, each part is more flexible in the installation process, main body structure support is mainly provided for a plurality of single battery series connection groups through the guide reinforcing shell, and the single battery series connection groups, the upper feeding plate, the lower feeding plate and the like can be orderly installed.

Description

Technical Field

[0001] The present invention relates to the technical field of battery stacks, and in particular to a vanadium liquid flow battery stack and an assembly method thereof. Background Art

[0002] Vanadium battery, whose full name is all-vanadium liquid flow battery, is a redox battery in which the active material is in a circulating flowing liquid state. As early as the 1960s, iron-chromium system redox batteries were introduced, but vanadium-based redox batteries were first proposed by Marria Kacos of the University of New South Wales, Australia in 1985. After more than 20 years of research and development, vanadium battery technology has become mature.

[0003] At present, the design of vanadium flow battery stacks usually adopts traditional structural methods, including simple end plates, single-cell battery series groups and basic feed plates. In terms of connection methods, bolt connection is more conventional. The end plates, single-cell battery series groups and basic feed plates are placed between the upper end plate and the lower end plate in sequence, and then the upper end plate and the lower end plate are fixed by screws and nuts. This design can meet the basic operating requirements of the stack to a certain extent, but it is insufficient in terms of installation accuracy and long-term reliability. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a vanadium liquid flow battery stack and an assembly method thereof, which solves the problems of insufficient installation accuracy and long-term reliability of the traditional structural method.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vanadium liquid flow battery stack, comprising a plurality of single-chip battery series groups, an upper end plate and a lower end plate, the upper end plate and the lower end plate are both provided with a clamping mechanism on their exteriors, a connecting mechanism 1 is provided on the outer wall of the clamping mechanism, an upper feed plate and a lower feed plate are respectively installed on the upper and lower sides of the single-chip battery series group, a guiding reinforcing mechanism is provided at the four external corners of the single-chip battery series group, the upper feed plate and the lower feed plate, a connecting mechanism 2 is provided at the four external corners of the upper end plate and the lower end plate, and a reinforcing mechanism is provided on both the left and right sides of the exterior of the single-chip battery series group;

[0006] The guide reinforcement mechanism includes a guide reinforcement shell, an upper fixing groove is provided at the bottom of the upper end plate, and a lower fixing groove is provided at the top of the lower end plate, the upper and lower ends of the guide reinforcement shell are respectively inserted into the inner walls of the upper fixing groove and the lower fixing groove, and reinforcement plates are provided on the sides away from the upper feed plate and the lower feed plate, and a guide rod 1 is fixedly connected at the outer corner of the reinforcement plate, and a guide rod 2 is fixedly connected at the outer corner of the upper feed plate and the lower feed plate, and a guide rod 3 is fixedly connected at the outer corner of the single-chip battery series group, and the outer sides of the guide rod 1, the guide rod 2 and the guide rod 3 are all slidably connected to the inner wall of the guide reinforcement shell, and the outer sides of the guide rod 1, the guide rod 2 and the guide rod 3 are all provided with limiting components, and the limiting components are used to limit the guide rod 1, the guide rod 2 and the guide rod 3 when they are connected.

[0007] Preferably, the limiting assembly includes guide plate one, guide plate two and guide plate three, the outer side of guide plate one is fixedly connected to the outer side of guide rod one, the outer side of guide plate two is fixedly connected to the outer side of guide rod two, the outer side of guide plate three is fixedly connected to the outer side of guide rod three, a guide groove is provided on the inner side of the guide reinforcement shell, and the outer sides of guide plate one, guide plate two and guide plate three are all slidably connected to the inner wall of the guide groove.

[0008] Preferably, the clamping mechanism includes a clamping plate, a side of the clamping plate close to the single-chip battery series group is fixedly connected with a plurality of symmetrically distributed positioning rods, a side of the upper end plate and the lower end plate away from each other are provided with a plurality of symmetrically distributed clamping grooves, a plurality of clamping grooves are correspondingly provided with clamping blocks, a spring 1 is provided on the outer wall of the clamping block, a positioning groove is provided on the side of the clamping block close to the spring 1, the bottom of the positioning rod is plugged into the inner wall of the positioning groove, a connecting component 1 is provided on the outer wall of the clamping plate, and the connecting component 1 is used to connect the clamping plate and the end plate.

[0009] Preferably, the connecting component 1 includes four connecting blocks, the outside of the connecting blocks are fixedly connected to the outer wall of the clamping plate, and connecting grooves are provided at corresponding positions of the four corners on one side away from the upper end plate and the lower end plate, and the outside of the connecting blocks are plugged into the inner wall of the connecting groove.

[0010] Preferably, the connecting mechanism 1 includes a connecting plate 1 and a connecting plate 2, the outer sides of the four connecting plates 1 are respectively fixedly connected to the outer sides of the short sides of the relative clamping plate, the outer sides of the four connecting plates 2 are respectively fixedly connected to the outer sides of the long sides of the relative clamping plate, the two connecting plates 1 on the opposite sides are connected by a connecting bolt 1, and the two connecting plates 2 on the opposite sides are connected by a connecting bolt 2.

[0011] Preferably, the second connecting mechanism includes an L-shaped plate, the outer sides of the two L-shaped plates are respectively fixedly connected to the outer corners of the upper end plate and the lower end plate, a connecting rod is arranged between the two L-shaped plates, and the connecting rod is connected to the upper end plate and the lower end plate through spring 2.

[0012] Preferably, one side of the upper end plate and the lower end plate is provided with an electrolyte inlet, and the other side of the upper end plate and the lower end plate is provided with an electrolyte outlet.

[0013] Preferably, the reinforcing mechanism includes a reinforcing plate, which is connected to the upper end plate and the lower end plate through reinforcing bolts, and a connecting component 2 is provided on the side of the reinforcing plate close to the end plate, and the connecting component 2 is used to connect the reinforcing plate to the upper end plate and the lower end plate.

[0014] Preferably, the connecting assembly includes two connecting plates, the outside of the connecting plates is fixedly connected to the side of the reinforcing plate close to the end plate, the outer sides of the upper end plate and the lower end plate are provided with connecting grooves, and the outside of the connecting plates is plugged into the inner wall of the connecting groove.

[0015] The present invention also provides a vanadium liquid flow battery stack assembly method, comprising the following steps:

[0016] S1. Place the lower end plate steadily, then insert the lower end of the guide reinforcement shell into the lower fixed groove in turn, and slide one of the reinforcement plates in the guide reinforcement shell through guide plate one and guide rod one, and then contact with the lower end plate, then slide one of the lower feed plates in the guide reinforcement shell through guide plate two and guide rod two, and then contact with one of the reinforcement plates, slide the installed single-chip battery series group in the guide reinforcement shell through guide plate three and guide rod three, and then contact with one of the lower feed plates, and then install the upper feed plate and the other reinforcement plate in the corresponding positions in turn, and operate the same as above. At this time, plug the upper fixed groove on the upper end plate into the upper end of the corresponding guide reinforcement plate.

[0017] S2. Insert a plurality of connecting rods into the corresponding through holes on the L-shaped plate, and then connect the connecting rods to the L-shaped plate through spring 2.

[0018] S3. The reinforcing plate is connected to the connecting grooves on the corresponding upper end plate and lower end plate through multiple connecting plates, and then the reinforcing plate is fixed to the two sides of the outside of the multi-cell series assembly through reinforcing bolts.

[0019] S4. Place one of the clamping plates steadily, then connect the positioning grooves on the clamping block of the multiple driving springs 1 with the corresponding positioning rods, and then connect the multiple connecting grooves on the lower end plate with the connecting blocks on one of the clamping plates. Then the clamping block can smoothly enter the clamping groove. At this time, put the multiple clamping blocks of the driving springs 1 into the corresponding clamping grooves on the upper end plate, and then insert the multiple connecting blocks on the other clamping plate into the corresponding upper end plate connecting grooves. At this time, the multiple positioning rods on the other clamping plate can be easily inserted into the positioning grooves on the corresponding clamping blocks.

[0020] S5. Insert multiple connecting bolts 1 into the corresponding through holes on the connecting plate 1, and then connect the connecting bolts 1 to the connecting plate 1 through nuts. Insert multiple connecting bolts 2 into the corresponding through holes on the connecting plate 2, and then connect the connecting bolts 2 to the connecting plate 2 through nuts.

[0021] The present invention provides a vanadium liquid flow battery stack and an assembly method thereof, which has the following beneficial effects:

[0022] 1. The arrangement of the guide reinforcement shell, guide groove, guide rod and guide plate of the present invention makes each component more flexible during the installation process. The guide reinforcement shell mainly provides the main structural support for multiple single-chip battery series groups, and ensures that the single-chip battery series groups, upper feed plates and lower feed plates can be installed in an orderly manner. And it can withstand a certain external force, protect the internal structure from damage, and improve the structural stability of the entire battery stack. The reinforcement plate increases the strength and rigidity of the battery stack, and prevents the feed plate from being deformed or damaged under the pressure of the electrolyte.

[0023] 2. The clamping plate of the present invention is connected to spring 1, so that the spring generates pressure on the end plates to ensure that the internal structure is tightly combined. The cooperation between the positioning rod and the clamping block, as well as the provision of multiple clamping blocks, can effectively disperse the pressure, make the clamping force more uniform, and improve the reliability of the battery stack. Spring 1 provides elastic force for the clamping block to ensure sufficient clamping force in different situations. The accurate cooperation between the positioning groove and the positioning rod ensures the accurate position of the spring, thereby improving the structural stability and performance of the battery stack as a whole.

[0024] 3. The reinforcing plate of the present invention is firmly connected to the end plate through reinforcing bolts, which greatly improves the overall structural strength of the stack and effectively prevents deformation due to internal pressure or external impact. The connecting plate is used as a connection point and is plugged into the connecting groove on the end plate, providing an accurate position for the installation of the reinforcing plate, making the installation process more convenient, quick and accurate, and further enhancing the stability and reliability of the stack structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2It is a schematic diagram of the structure of the enhancement mechanism of the present invention;

[0027] Figure 3 It is a schematic diagram of the connection groove structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the compression block of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the guide reinforcement mechanism of the present invention;

[0031] Figure 7 for Figure 6 A in the enlarged view;

[0032] Figure 8 It is a schematic diagram of the guide groove structure of the present invention;

[0033] Fig. 9 It is a schematic diagram of the L-shaped plate structure of the present invention;

[0034] Fig.10 for Fig. 9 Enlarged view of point B in .

[0035] Among them, 1. a single-chip battery series group; 2. an upper end plate; 3. a lower end plate; 4. a clamping mechanism; 401. a clamping plate; 402. a positioning groove; 403. a positioning rod; 404. a connecting block; 405. a clamping groove; 406. a connecting groove; 407. a spring; 408. a clamping block; 5. a guide reinforcement mechanism; 501. a guide reinforcement shell; 502. a guide groove; 503. a reinforcement plate; 504. a guide rod; 505. a guide plate; 506. a guide rod; 507. a guide plate; 508. a guide rod; 509 , guide plate three; 5010, upper fixing groove; 5011, lower fixing groove; 6, upper feed plate; 7, lower feed plate; 8, connecting mechanism one; 801, connecting plate one; 802, connecting bolt one; 803, connecting plate two; 804, connecting bolt two; 9, connecting mechanism two; 901, L-shaped plate; 902, connecting rod; 903, spring two; 10, reinforcement mechanism; 1001, reinforcement plate; 1002, reinforcement bolt; 1003, connecting plate; 1004, connecting groove; 11, electrolyte inlet; 12, electrolyte outlet. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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.

[0037] See also Figure 1-Figure 10 The embodiment of the present invention provides a vanadium liquid flow battery stack, including a plurality of monolithic battery series groups 1, an upper end plate 2 and a lower end plate 3. The upper end plate 2 and the lower end plate 3 are both provided with a clamping mechanism 4 on the outside. The clamping mechanism 4 ensures that the upper end plate 2 and the lower end plate 3 apply stable pressure to the monolithic battery series group 1 and other structures to prevent looseness between the components and ensure the overall structural stability of the battery stack. The outer wall of the clamping mechanism 4 is provided with a connecting mechanism 8 to enhance the connection stability between the clamping mechanisms 4. The upper and lower sides of the monolithic battery series group 1 are respectively installed with an upper feed plate 6 and a lower feed plate 7. The upper feed plate 6 and the lower feed plate 7 provide special channels and distribution areas for the inflow and outflow of the electrolyte, ensuring that the electrolyte can be in uniform contact with the monolithic battery. The four external corners of the single-chip battery series group 1, the upper feed plate 6 and the lower feed plate 7 are all provided with guiding and reinforcing mechanisms 5 to provide support and guidance for these components from multiple directions to prevent dislocation or offset during installation and use, ensure the accurate position relationship of each component, and improve the assembly accuracy and operation stability of the battery stack. The four external corners of the upper end plate 2 and the lower end plate 3 are all provided with connecting mechanisms 9 to enhance the tightness of the connection between the upper end plate 2 and the lower end plate 3. Reinforcement mechanisms 10 are provided on both sides of the outside of the single-chip battery series group 1. The structural strength of the single-chip battery series group 1 is further improved to prevent deformation and damage caused by internal pressure or external factors during long-term use, thereby extending the service life of the battery.

[0038] The guide reinforcement mechanism 5 includes a guide reinforcement shell 501, which mainly provides the main structural support for the multiple single-chip battery series group 1, and ensures that the single-chip battery series group 1, the upper feed plate 6 and the lower feed plate 7 can be installed and operated in an orderly manner. And it can withstand a certain external force, protect the internal structure from damage, and improve the structural stability of the entire battery stack. An upper fixing groove 5010 is provided at the bottom of the upper end plate 2, and a lower fixing groove 5011 is provided at the top of the lower end plate 3. The upper and lower ends of the guide reinforcement shell 501 are respectively plugged into the inner walls of the upper fixing groove 5010 and the lower fixing groove 5011. The setting of the upper fixing groove 5010 and the lower fixing groove 5011 provides an accurate installation position for the guide reinforcement shell 501, so that the guide reinforcement shell 501 can be tightly combined with the end plate. A reinforcement plate 503 is provided on the side away from the upper feed plate 6 and the lower feed plate 7. The reinforcement plate 503 increases the strength and rigidity of the battery stack and prevents the feed plate from being deformed or damaged under the pressure of the electrolyte. So as to maintain the flow stability of the electrolyte and improve the performance and life of the battery stack. A guide rod 1 504 is fixedly connected to the outer corner of the reinforcing plate 503, and the guide rod 1 504 provides accurate guidance for the reinforcing plate 503, so that the reinforcing plate 503 can maintain the correct position during installation and use. The outer corners of the upper feed plate 6 and the lower feed plate 7 are fixedly connected to the guide rod 2 506, and the guide rod 2 506 provides additional guidance and support for the feed plate. A guide rod 3 508 is fixedly connected to the outer corner of the single-chip battery series group 1, and the guide rod 3 508 provides positioning and guidance for the single-chip battery series group 1. The outer sides of the guide rod 1 504, the guide rod 2 506 and the guide rod 3 508 are all slidably connected to the inner wall of the guide reinforcement shell 501, so that each component is more flexible during installation.

[0039] See also Figure 6-Figure 8 The outer sides of the guide rod 1 504, the guide rod 2 506 and the guide rod 3 508 are all provided with limiting components, and the setting of the limiting components can ensure that the guide rods will not be excessively displaced during the installation process. The limiting components are used to limit the guide rods 1 504, the guide rod 2 506 and the guide rod 3 508 when they are connected. When the guide rods are connected, the limiting components can enable each guide rod to be accurately installed at a predetermined position, avoiding the subsequent use effect being affected by inaccurate installation. The limiting components include a guide plate 1 505, a guide plate 2 507 and a guide plate 3 509. The outer side of the guide plate 1 505 is fixedly connected to the outer side of the guide rod 1 504, the outer side of the guide plate 2 507 is fixedly connected to the outer side of the guide rod 2 506, and the outer side of the guide plate 3 509 is fixedly connected to the outer side of the guide rod 3 508. A guide groove 502 is provided on the inner side of the guide reinforcement shell 501, and the guide groove 502 provides a specific space for the movement of the guide plate. The outer sides of the guide plate 1 505 , the guide plate 2 507 and the guide plate 3 509 are all slidably connected to the inner wall of the guide groove 502 , so that the guide plates can move smoothly in the guide groove 502 .

[0040] See also Figure 2-Figure 5 The clamping mechanism 4 includes a clamping plate 401, which has a connecting function so that the spring 407 exerts pressure on the end plate. A plurality of symmetrically distributed positioning rods 403 are fixedly connected to the side of the clamping plate 401 close to the single-chip battery series group 1. The positioning rods 403 play a role of positioning and connection, so that the clamping block 408 can be firmly in the clamping groove 405. A plurality of symmetrically distributed clamping grooves 405 are provided on the side away from the upper end plate 2 and the lower end plate 3, and the clamping grooves 405 provide a placement space for the clamping block 408. A plurality of clamping grooves 405 are correspondingly provided with clamping blocks 408. The clamping blocks 408 can exert pressure on the positioning rods 403 under the action of the spring, thereby achieving the clamping of the plurality of single-chip battery series groups 1 and other components. The plurality of clamping blocks 408 can disperse the pressure, make the clamping force more uniform, and improve the reliability of the battery stack. The outer wall of the clamping block 408 is provided with a spring 1 407, which can provide elastic force for the clamping block 408 to ensure that there is always sufficient clamping force. A positioning groove 402 is provided on the side of the clamping block 408 close to the spring 1 407, and the bottom of the positioning rod 403 is plugged into the inner wall of the positioning groove 402. The positioning groove 402 can accurately match the positioning rod 403, so that the position of the spring 1 407 is accurate.

[0041] See also Figure 1-Figure 4 The outer wall of the clamping plate 401 is provided with a connecting component 1, which is used to connect the clamping plate 401 with the end plate. The connecting component 1 includes four connecting blocks 404. The outside of the connecting block 404 is fixedly connected to the outer wall of the clamping plate 401. The connecting block 404 makes the connection between the end plate and the clamping plate 401 faster and more convenient. Connecting grooves 406 are provided at the corresponding positions of the four corners of the side away from the upper end plate 2 and the lower end plate 3, making the connection process more convenient and accurate. The outside of the connecting block 404 is plugged into the inner wall of the connecting groove 406, which makes it easy to install when connecting the end plate and the clamping plate 401, and is faster and more convenient.

[0042] See also Figure 1 , Figure 2 and Figure 4The connection mechanism 1 8 includes a connection plate 1 801 and a connection plate 2 803. The outer sides of the four connection plates 1 801 are respectively fixedly connected to the outer sides of the short sides of the relative clamping plates 401, providing installation positions for connecting the two clamping plates 401. The outer sides of the four connection plates 2 803 are respectively fixedly connected to the outer sides of the long sides of the relative clamping plates 401, providing installation positions for connecting the two clamping plates 401. The two connection plates 1 801 on the opposite sides are connected by a connection bolt 1 802. The connection bolt 1 802 enables the relative connection plates 1 801 to be firmly connected together, thereby realizing the connection and fixation of the clamping plates 401 on both sides, and then the connection and fixation of the two clamping plates 401. The two connection plates 2 803 on the opposite sides are connected by a connection bolt 2 804. The connection bolt 2 804 is similar to the connection bolt 1 802, providing a reliable connection between the connection plates 2 803, and further strengthening the connection effect of the connection mechanism 1 8.

[0043] See also Figure 1-Figure 3 The connection mechanism 29 includes an L-shaped plate 901, which provides a specific connection infrastructure for the connection mechanism 29, and its shape design can better adapt to the outer corners of the upper end plate 2 and the lower end plate 3. The outer sides of the two L-shaped plates 901 are fixedly connected to the outer corners of the upper end plate 2 and the lower end plate 3, respectively. Fixing the L-shaped plates 901 to the outer corners of the upper end plate 2 and the lower end plate 3 can effectively utilize the space at the outer corners, while ensuring that the connection between the connection mechanism 29 and the end plate is firm. A connecting rod 902 is provided between the two L-shaped plates 901, and the connecting rod 902 provides an installation position for the spring 2 903. The connecting rod 902 is connected to the upper end plate 2 and the lower end plate 3 through the spring 2 903, and the upper end plate 2 is connected and fixed to the lower end plate 3 through the spring 2 903.

[0044] See also Figure 1-Figure 3 An electrolyte inlet 11 is provided on one side of the upper end plate 2 and the lower end plate 3, and an electrolyte outlet 12 is provided on the other side of the upper end plate 2 and the lower end plate 3. The electrolyte inlet 11 and the electrolyte outlet 12 are existing technologies. The electrolyte inlet 11 and the electrolyte outlet 12 are respectively provided on both sides of the end plate, so that the electrolyte can flow into and out of the battery stack smoothly.

[0045] See also Figure 1-Figure 2 The reinforcement mechanism 10 includes a reinforcement plate 1001, which is connected to the upper end plate 2 and the lower end plate 3 by reinforcement bolts 1002. A connection component 2 is provided on the side of the reinforcement plate 1001 close to the end plate. The connection component 2 is used to connect the reinforcement plate 1001 to the upper end plate 2 and the lower end plate 3. The arrangement of the reinforcement plate 1001 can improve the overall structural strength of the stack and prevent deformation due to internal pressure or external impact during use. The connection is made by reinforcement bolts 1002 to ensure that the connection between the reinforcement plate 1001 and the end plate is firm and reliable.

[0046] See also Figure 2 The second connection assembly includes two connecting plates 1003. The outside of the connecting plates 1003 is fixedly connected to the side of the reinforcing plate 1001 close to the end plate. The connecting plates 1003 provide specific connection points for the connection between the reinforcing plate 1001 and the end plate. The outer sides of the upper end plate 2 and the lower end plate 3 are both provided with connecting grooves 1004. The setting of the connecting grooves 1004 provides an accurate installation position for the connecting plates 1003, making the connection process more convenient and accurate. The outer side of the connecting plate 1003 is plugged into the inner wall of the connecting groove 1004, making the reinforcing plate 1001 faster and more convenient to install.

[0047] Please refer to the attached Figure 1-Figure 10 The present invention also provides a vanadium liquid flow battery stack assembly method, comprising the following steps:

[0048] S1. Place the lower end plate 3 steadily, then insert the lower end of the guide reinforcement shell 501 into the lower fixed groove 5011 in turn, and slide one of the reinforcement plates 503 in the guide reinforcement shell 501 through the guide plate 1 505 and the guide rod 1 504, and then contact with the lower end plate 3, then slide one of the lower feed plates 7 in the guide reinforcement shell 501 through the guide plate 2 507 and the guide rod 2 506, and then contact with one of the reinforcement plates 503, slide the installed single-chip battery series group 1 in the guide reinforcement shell 501 through the guide plate 3 509 and the guide rod 3 508, and then contact with one of the lower feed plates 7, and then install the upper feed plate 6 and the other reinforcement plate 503 in the corresponding positions in turn, and operate the same as above. At this time, plug the upper fixed groove 5010 on the upper end plate 2 with the upper end of the corresponding guide reinforcement plate 503 to complete the preliminary construction of the overall frame, ensure the relative position of each component is accurate, and lay the foundation for the stable operation of the battery stack.

[0049] S2. By inserting a plurality of connecting rods 902 into the corresponding through holes on the L-shaped plate 901, and then connecting the connecting rods 902 to the L-shaped plate 901 through the second spring 903, the stability and reliability of the stack structure are ensured.

[0050] S3, the reinforcing plate 1001 is connected to the connecting grooves 1004 on the corresponding upper end plate 2 and lower end plate 3 through multiple connecting plates 1003, and then the reinforcing plate 1001 is fixed to the outer sides of the multi-cell series assembly through reinforcing bolts 1002. The reinforcing plate 1001 is connected to the connecting grooves 1004 on the upper end plate and the lower end plate through the connecting plates 1003, and then fixed with reinforcing bolts 1002, further enhancing the overall structural strength of the battery stack. The reinforcing plate 1001 can prevent the battery stack from being deformed due to internal pressure or external impact during use, thereby improving the durability and safety of the battery stack.

[0051] S4. Place one of the clamping plates 401 steadily, then connect the positioning grooves 402 on the clamping block 408 of the multiple driving springs 407 with the corresponding positioning rods 403, and then connect the multiple connecting grooves 406 on the lower end plate 3 with the connecting blocks 404 on one of the clamping plates 401, and then the clamping block 408 can smoothly enter the clamping groove 405. At this time, put the clamping block 408 of the multiple driving springs 407 into the clamping groove 405 on the corresponding upper end plate 2, and then insert the multiple connecting blocks 404 on the other clamping plate 401 into the corresponding connecting grooves 406 on the upper end plate 2. At this time, the multiple positioning rods 403 on the other clamping plate 401 can be easily inserted into the positioning grooves 402 on the corresponding clamping block 408, so that the clamping plate 401 can effectively exert pressure on the internal structure, ensure close contact between components such as the single-chip battery series group 1, and improve the electrical performance and stability of the battery stack. The setting of spring 1 407 can provide elastic force for the pressing block 408 to ensure that there is always sufficient pressing force.

[0052] S5. Insert multiple connecting bolts 802 into the through holes on the corresponding connecting plate 801, and then connect the connecting bolts 802 to the connecting plate 801 through nuts, so that the two clamping plates 401 can be firmly connected together, so as to better apply uniform pressure to the internal structure of the battery stack. Insert multiple connecting bolts 804 into the through holes on the corresponding connecting plate 803, and then connect the connecting bolts 804 to the connecting plate 803 through nuts. The use of nuts ensures the firmness of the connecting bolts.

[0053] 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. A vanadium liquid flow battery stack, comprising a plurality of monolithic battery cells connected in series (1), an upper end plate (2) and a lower end plate (3), characterized in that: The outer sides of the upper end plate (2) and the lower end plate (3) are both provided with a clamping mechanism (4), the outer wall of the clamping mechanism (4) is provided with a connecting mechanism 1 (8), the upper and lower sides of the single-chip battery series group (1) are respectively provided with an upper feed plate (6) and a lower feed plate (7), the outer four corners of the single-chip battery series group (1), the upper feed plate (6) and the lower feed plate (7) are all provided with a guiding reinforcement mechanism (5), the outer four corners of the upper end plate (2) and the lower end plate (3) are both provided with a connecting mechanism 2 (9), and the outer left and right sides of the single-chip battery series group (1) are both provided with a reinforcement mechanism (10); The guide reinforcement mechanism (5) comprises a guide reinforcement shell (501), an upper fixing groove (5010) is provided at the bottom of the upper end plate (2), a lower fixing groove (5011) is provided at the top of the lower end plate (3), the upper and lower ends of the guide reinforcement shell (501) are respectively inserted into the inner walls of the upper fixing groove (5010) and the lower fixing groove (5011), and a reinforcement plate (503) is provided on the side away from the upper feed plate (6) and the lower feed plate (7), and a guide rod (504) is fixedly connected at the outer corner of the reinforcement plate (503), and the upper feed plate (6) and the lower feed plate (7) are connected to each other. The outer corners of the material plate (7) are fixedly connected with guide rods 2 (506), the outer corners of the single-chip battery series group (1) are fixedly connected with guide rods 3 (508), the outer sides of the guide rods 1 (504), 2 (506) and 3 (508) are slidably connected to the inner wall of the guide reinforcement shell (501), and the outer sides of the guide rods 1 (504), 2 (506) and 3 (508) are provided with limiting components, and the limiting components are used for limiting the guide rods 1 (504), 2 (506) and 3 (508) when they are connected.

2. A vanadium liquid flow battery stack according to claim 1, characterized in that: The limit assembly comprises a guide plate 1 (505), a guide plate 2 (507) and a guide plate 3 (509); the outer side of the guide plate 1 (505) is fixedly connected to the outer side of the guide rod 1 (504); the outer side of the guide plate 2 (507) is fixedly connected to the outer side of the guide rod 2 (506); the outer side of the guide plate 3 (509) is fixedly connected to the outer side of the guide rod 3 (508); a guide groove (502) is provided on the inner side of the guide reinforcement shell (501); the outer sides of the guide plate 1 (505), the guide plate 2 (507) and the guide plate 3 (509) are all slidably connected to the inner wall of the guide groove (502).

3. The vanadium liquid flow battery stack according to claim 1, characterized in that: The clamping mechanism (4) comprises a clamping plate (401), a side of the clamping plate (401) close to the single-cell battery series group (1) is fixedly connected with a plurality of symmetrically distributed positioning rods (403), a side of the upper end plate (2) and the lower end plate (3) away from each other is provided with a plurality of symmetrically distributed clamping grooves (405), a plurality of clamping blocks (408) are correspondingly arranged in the plurality of clamping grooves (405), an outer wall of the clamping block (408) is provided with a spring 1 (407), a side of the clamping block (408) close to the spring 1 (407) is provided with a positioning groove (402), the bottom of the positioning rod (403) is plugged into the inner wall of the positioning groove (402), and the outer wall of the clamping plate (401) is provided with a connecting component 1, the connecting component 1 is used to connect the clamping plate (401) with the end plate.

4. A vanadium liquid flow battery stack according to claim 3, characterized in that: The connection assembly 1 comprises four connection blocks (404), the exterior of the connection blocks (404) being fixedly connected to the outer wall of the clamping plate (401), and connection grooves (406) are provided at corresponding positions of four corners on a side away from the upper end plate (2) and the lower end plate (3), and the exterior of the connection blocks (404) are plugged into and matched with the inner wall of the connection groove (406).

5. The vanadium liquid flow battery stack according to claim 1, characterized in that: The connecting mechanism 1 (8) includes a connecting plate 1 (801) and a connecting plate 2 (803). The outer sides of the four connecting plates 1 (801) are respectively fixedly connected to the outer sides of the short sides of the relative clamping plate (401). The outer sides of the four connecting plates 2 (803) are respectively fixedly connected to the outer sides of the long sides of the relative clamping plate (401). The two connecting plates 1 (801) on the opposite sides are connected by a connecting bolt 1 (802). The two connecting plates 2 (803) on the opposite sides are connected by a connecting bolt 2 (804).

6. The vanadium liquid flow battery stack according to claim 1, characterized in that: The second connecting mechanism (9) comprises an L-shaped plate (901), the outer sides of the two L-shaped plates (901) are respectively fixedly connected to the outer corners of the upper end plate (2) and the lower end plate (3), and a connecting rod (902) is provided between the two L-shaped plates (901), and the connecting rod (902) is connected to the upper end plate (2) and the lower end plate (3) via a second spring (903).

7. The vanadium liquid flow battery stack according to claim 1, characterized in that: One side of the upper end plate (2) and the lower end plate (3) is provided with an electrolyte inlet (11), and the other side of the upper end plate (2) and the lower end plate (3) is provided with an electrolyte outlet (12).

8. The vanadium liquid flow battery stack according to claim 1, characterized in that: The reinforcing mechanism (10) comprises a reinforcing plate (1001), wherein the reinforcing plate (1001) is connected to an upper end plate (2) and a lower end plate (3) via reinforcing bolts (1002), and a second connecting component is provided on a side of the reinforcing plate (1001) close to the end plate, wherein the second connecting component is used to connect the reinforcing plate (1001) to the upper end plate (2) and the lower end plate (3).

9. The vanadium liquid flow battery stack according to claim 1, characterized in that: The second connection component comprises two connecting plates (1003), the outside of the connecting plates (1003) being fixedly connected to a side of the reinforcing plate (1001) close to the end plate, the outsides of the upper end plate (2) and the lower end plate (3) being provided with connecting grooves (1004), the outside of the connecting plates (1003) being plugged into and fitted with the inner wall of the connecting grooves (1004).

10. A method for assembling a vanadium redox flow battery stack, according to the vanadium redox flow battery stack according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the lower end plate (3) steadily, then insert the lower end of the guide reinforcement shell (501) into the lower fixing groove (5011) in sequence, and slide one of the reinforcement plates (503) in the guide reinforcement shell (501) through the guide plate 1 (505) and the guide rod 1 (504), and then contact the lower end plate (3), and then slide one of the lower feed plates (7) in the guide reinforcement shell (501) through the guide plate 2 (507) and the guide rod 2 (506), and then Contact with one of the reinforcing plates (503), slide the installed single-chip battery series group (1) in the guide reinforcing shell (501) through the guide plate three (509) and the guide rod three (508), and then contact with one of the lower feed plates (7), and then install the upper feed plate (6) and another reinforcing plate (503) in the corresponding position in turn, and operate the same as above, at this time, plug the upper fixing groove (5010) on the upper end plate (2) into the upper end of the corresponding guide reinforcing plate (503); S2, inserting a plurality of connecting rods (902) into corresponding through holes on the L-shaped plate (901), and then connecting the connecting rods (902) to the L-shaped plate (901) through spring 2 (903); S3, the reinforcing plate (1001) is connected to the connecting grooves (1004) on the corresponding upper end plate (2) and lower end plate (3) through a plurality of connecting plates (1003), and then the reinforcing plate (1001) is fixed to both sides of the outside of the multi-cell battery series assembly through reinforcing bolts (1002); S4, by placing one of the clamping plates (401) stably, and then by plugging the positioning grooves (402) on the clamping block (408) of the plurality of driving springs (407) with the corresponding positioning rods (403), and then by connecting the plurality of connecting grooves (406) on the lower end plate (3) with the connecting blocks (404) on one of the clamping plates (401), the clamping block (408) can then smoothly enter the clamping groove (405), and then the clamping blocks (408) of the plurality of driving springs (407) are placed into the clamping grooves (405) on the corresponding upper end plate (2), and then the plurality of connecting blocks (404) on another clamping plate (401) are inserted into the corresponding connecting grooves (406) of the upper end plate (2), and then the plurality of positioning rods (403) on the other clamping plate (401) can be conveniently inserted into the positioning grooves (402) on the corresponding clamping blocks (408); S5. Insert multiple connecting bolts (802) into the corresponding through holes on connecting plate (801), and then connect connecting bolts (802) to connecting plate (801) through nuts. Insert multiple connecting bolts (804) into the corresponding through holes on connecting plate (803), and then connect connecting bolts (804) to connecting plate (803) through nuts.

Images