Vanadium flow battery stack and method of assembling the same

Abstract

The application relates to the technical field of battery stacks, and discloses a vanadium flow battery stack and an assembling method thereof. The battery stack comprises a plurality of single-cell battery series, an upper end plate and a lower end plate. The outer parts of the upper end plate and the lower end plate are provided with pressing mechanisms. The outer walls of the pressing mechanisms are provided with connecting mechanisms I. The upper and lower sides of the single-cell battery series are respectively provided with upper and lower feeding plates. The outer four corners of the single-cell battery series, the upper feeding plate and the lower feeding plate are provided with guiding and reinforcing mechanisms. The outer four corners of the upper end plate and the lower end plate are provided with connecting mechanisms II. The guiding and reinforcing shells, the guiding grooves, the guiding rods and the guiding plates are arranged, so that each component is more flexible during the installation process. The guiding and reinforcing shells mainly provide main structure support for the plurality of single-cell battery series, and ensure that the single-cell battery series, the upper feeding plate and the lower feeding plate and the like can be orderly installed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery stack, in particular to a vanadium flow battery stack and an assembling method thereof. BACKGROUND

[0002] Vanadium battery, also known as all-vanadium redox flow battery, is a kind of redox battery with circulating flow liquid active substance. As early as in the 1960s, there was an iron-chromium system redox battery, but the vanadium redox battery was proposed by Marria Kacos of the University of New South Wales in Australia in 1985. After more than 20 years of research and development, the vanadium battery technology has been mature.

[0003] At present, the design of vanadium flow battery stack usually adopts a traditional structure, including simple end plates, single cell series groups and basic feed plates. In terms of connection, bolt connection is more common. The end plates, single cell series groups and basic feed plates are sequentially placed between the upper end plate and the lower end plate, and then the upper end plate and the lower end plate are fixed by the screw rod and the screw cap. This design can meet the basic operation requirements of the stack to a certain extent, but it has shortcomings in installation precision and long-term reliability. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a vanadium flow battery stack and an assembling method thereof, which solves the problem of insufficient installation precision and long-term reliability of the traditional structure.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: a vanadium flow battery stack, comprising a plurality of single cell series groups, an upper end plate and a lower end plate, the outer part of the upper end plate and the lower end plate is provided with a pressing mechanism, the outer wall of the pressing mechanism is provided with a connecting mechanism one, the upper and lower sides of the single cell series group are respectively provided with an upper feed plate and a lower feed plate, the outer four corners of the single cell series group, the upper feed plate and the lower feed plate are provided with a guide reinforcing mechanism, the outer four corners of the upper end plate and the lower end plate are provided with a connecting mechanism two, and the outer left and right sides of the single cell series group are provided with a reinforcing mechanism.

[0006] The guiding reinforcing mechanism comprises a guiding reinforcing shell, the bottom of the upper end plate is provided with an upper fixing groove, the top of the lower end plate is provided with a lower fixing groove, the upper and lower ends of the guiding reinforcing shell are respectively inserted into the inner walls of the upper and lower fixing grooves, the sides away from each other of the upper and lower feeding plates are provided with reinforcing plates, the outer corners of the reinforcing plates are fixedly connected with guiding rods one, the outer corners of the upper and lower feeding plates are fixedly connected with guiding rods two, the outer corners of the monolithic battery series are fixedly connected with guiding rods three, the outer sides of the guiding rods one, two and three are slidably connected with the inner wall of the guiding reinforcing shell, and the outer sides of the guiding rods one, two and three are provided with limiting assemblies.

[0007] Preferably, the limiting assembly comprises guiding plates one, two and three, the outer side of the guiding plate one is fixedly connected with the outer side of the guiding rod one, the outer side of the guiding plate two is fixedly connected with the outer side of the guiding rod two, the outer side of the guiding plate three is fixedly connected with the outer side of the guiding rod three, the inner side of the guiding reinforcing shell is provided with a guiding groove, and the outer sides of the guiding plates one, two and three are slidably connected with the inner wall of the guiding groove.

[0008] Preferably, the pressing mechanism comprises a pressing plate, a plurality of positioning rods are fixedly connected to the side of the pressing plate close to the monolithic battery series, a plurality of pressing grooves are symmetrically arranged on the sides away from each other of the upper and lower end plates, a plurality of pressing blocks are arranged in the pressing grooves in correspondence, spring one is arranged on the outer wall of the pressing block, a positioning groove is arranged on the side of the pressing block close to the spring one, the bottom of the positioning rod is inserted into the inner wall of the positioning groove in a matched mode, and a connecting assembly one is arranged on the outer wall of the pressing plate.

[0009] Preferably, the connecting assembly one comprises four connecting blocks, the outer sides of the connecting blocks are fixedly connected to the outer wall of the pressing plate, connecting grooves are arranged at the corresponding positions of the four corners of the sides away from each other of the upper and lower end plates, and the outer sides of the connecting blocks are inserted into the inner walls of the connecting grooves in a matched mode.

[0010] Preferably, the connecting mechanism one comprises connecting plates one and two, the outer sides of the four connecting plates one are respectively fixedly connected to the outer sides of the short sides of the pressing plate, the outer sides of the four connecting plates two are respectively fixedly connected to the outer sides of the long sides of the pressing plate, the two connecting plates one on the opposite sides are connected through connecting bolts one, and the two connecting plates two on the opposite sides are connected through connecting bolts two.

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

[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 comprises a reinforcing plate, the reinforcing plate is connected with the upper end plate and the lower end plate through reinforcing bolts, and the side of the reinforcing plate close to the end plate is provided with a connecting assembly two for connecting the reinforcing plate with the upper end plate and the lower end plate.

[0014] Preferably, the connecting assembly comprises two connecting plates, the outer sides of the connecting plates are fixedly connected at 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 outer sides of the connecting plates are inserted and matched with the inner walls of the connecting grooves.

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

[0016] S1, place the lower end plate stably, then insert the lower end of the guide reinforcing shell into the lower fixed groove in sequence, and slide one of the reinforcing plates through the guide plate one and the guide rod one in the guide reinforcing shell, then contact the lower end plate, then slide one of the lower feed plates through the guide plate two and the guide rod two in the guide reinforcing shell, then contact one of the reinforcing plates, then slide the installed single cell assembly through the guide plate three and the guide rod three in the guide reinforcing shell, then contact one of the lower feed plates, then install the upper feed plate and the other reinforcing plate in the corresponding position in sequence, and the operation is the same as above, at this time, the upper fixed groove on the upper end plate is inserted and matched with the upper end of the corresponding guide reinforcing plate.

[0017] S2, insert a plurality of connecting rods into the through holes in the corresponding L-shaped plates, and then connect the connecting rods with the L-shaped plates through the second springs.

[0018] S3, connect the reinforcing plate with the connecting grooves on the corresponding upper end plate and lower end plate through a plurality of connecting plates, and then fix the reinforcing plate on the outer sides of the multi-cell assembly through the reinforcing bolts.

[0019] S4, by smoothly placing one of the pressing plates, then by inserting the positioning grooves on the pressing blocks of the first driving spring into the corresponding positioning rods, then by connecting the connecting grooves on the lower end plate with the connecting blocks on one of the pressing plates, then the pressing blocks can smoothly enter the pressing grooves, at this time the pressing blocks of the first driving spring are placed into the corresponding pressing grooves on the upper end plate, then the connecting blocks on the other pressing plate are inserted into the corresponding connecting grooves on the upper end plate, at this time the positioning rods on the other pressing plate can be conveniently inserted into the positioning grooves on the corresponding pressing blocks.

[0020] S5, by inserting the connecting bolts one into the through holes on the corresponding connecting plate one, then connecting the connecting bolts one with the connecting plate one through the nuts, by inserting the connecting bolts two into the through holes on the corresponding connecting plate two, then connecting the connecting bolts two with the connecting plate two through the nuts.

[0021] The application provides a vanadium flow battery stack and an assembling method thereof.

[0022] 1, the setting of the guide reinforcing shell, the guide groove, the guide rod and the guide plate makes the components more flexible during installation.

[0023] 2, the pressing plate connecting spring one generates pressure on the end plate, ensuring that the internal structure is tightly combined.

[0024] 3, the reinforcing plate is firmly connected with the end plate through the reinforcing bolts, greatly improving the overall structural strength of the stack and effectively preventing deformation due to internal pressure or external impact. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective view of the application.

[0026] Figure 2Structure diagram of the reinforcing mechanism of the application;

[0027] Figure 3 Structure diagram of the connecting groove of the application;

[0028] Figure 4 Structure diagram of the pressing mechanism of the application;

[0029] Figure 5 Structure diagram of the pressing block of the application;

[0030] Figure 6 Structure diagram of the guiding reinforcing mechanism of the application;

[0031] Figure 7 Enlarged view of A in Figure 6

[0032] Figure 8 Structure diagram of the guiding groove of the application;

[0033] Figure 9 Structure diagram of the L-shaped plate of the application;

[0034] Figure 10 Enlarged view of B in Figure 9

[0035] In the figure, 1, single piece battery series connection; 2, upper end plate; 3, lower end plate; 4, pressing mechanism; 401, pressing plate; 402, positioning groove; 403, positioning rod; 404, connecting block; 405, pressing groove; 406, connecting groove; 407, spring one; 408, pressing block; 5, guiding reinforcing mechanism; 501, guiding reinforcing shell; 502, guiding groove; 503, reinforcing plate; 504, guiding rod one; 505, guiding plate one; 506, guiding rod two; 507, guiding plate two; 508, guiding rod three; 509, guiding plate three; 5010, upper fixed groove; 5011, lower fixed groove; 6, upper feeding plate; 7, lower feeding 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, reinforcing mechanism; 1001, reinforcing plate; 1002, reinforcing bolt; 1003, connecting plate; 1004, connecting groove; 11, electrolyte inlet; 12, electrolyte outlet. DETAILED DESCRIPTION

[0036] ​​The technical solutions of the present application will be described clearly and completely below with reference to the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0037] Please refer to Figures 1-10 The embodiment of the present application provides a vanadium flow battery stack, which comprises a plurality of single cell series 1, an upper end plate 2 and a lower end plate 3. The outer part of the upper end plate 2 and the lower end plate 3 is provided with a pressing mechanism 4. The pressing mechanism 4 ensures that the upper end plate 2 and the lower end plate 3 apply stable pressure to the single cell series 1 and other structures, prevents loosening between parts, and ensures the overall structural stability of the stack. The outer wall of the pressing mechanism 4 is provided with a connecting mechanism 8, which enhances the connection stability between the pressing mechanisms 4. The upper and lower sides of the single cell series 1 are respectively provided with an upper feeding plate 6 and a lower feeding plate 7. The upper feeding plate 6 and the lower feeding plate 7 provide a special channel and distribution area for the inflow and outflow of electrolyte, ensuring that the electrolyte can uniformly contact the single cell. The outer four corners of the single cell series 1, the upper feeding plate 6 and the lower feeding plate 7 are provided with a guide reinforcing mechanism 5, which provides support and guidance for these components from multiple directions, prevents misalignment or deviation during installation and use, ensures the accurate positional relationship of each component, and improves the assembly accuracy and running stability of the stack. The outer four corners of the upper end plate 2 and the lower end plate 3 are provided with a connecting mechanism 9, which enhances the connection tightness between the upper end plate 2 and the lower end plate 3. The outer left and right sides of the single cell series 1 are provided with a reinforcing mechanism 10. Further improve the structural strength of the single cell series 1, prevent deformation and damage caused by internal pressure or external factors during long-term use, and prolong the service life of the battery.

[0038] The guide reinforcing mechanism 5 includes a guide reinforcing shell 501, which mainly provides main body structure support for the plurality of single battery series groups 1 and ensures that the single battery series group 1, the upper feeding plate 6, and the lower feeding plate 7 can be orderly installed and operated. And can withstand certain external force, protect the internal structure from damage, and improve the structural stability of the entire stack. The bottom of the upper end plate 2 is provided with an upper fixed groove 5010, and the top of the lower end plate 3 is provided with a lower fixed groove 5011. The upper and lower ends of the guide reinforcing shell 501 are respectively inserted into the inner walls of the upper fixed groove 5010 and the lower fixed groove 5011. The provision of the upper fixed groove 5010 and the lower fixed groove 5011 provides an accurate installation position for the guide reinforcing shell 501, so that the guide reinforcing shell 501 can be closely combined with the end plate. The side away from the upper feeding plate 6 and the lower feeding plate 7 is provided with a reinforcing plate 503, which increases the strength and rigidity of the battery stack and prevents the feeding plate from deforming or being damaged under the pressure of the electrolyte. Make the flow stability of the electrolyte, improve the performance and life of the stack. The outer corner of the reinforcing plate 503 is fixedly connected with a guide rod one 504, which 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 corner of the upper feeding plate 6 and the lower feeding plate 7 is fixedly connected with a guide rod two 506, which provides additional guidance and support for the feeding plate. The outer corner of the single battery series group 1 is fixedly connected with a guide rod three 508, which provides positioning and guidance for the single battery series group 1. The outer sides of the guide rod one 504, the guide rod two 506, and the guide rod three 508 are all slidingly connected to the inner wall of the guide reinforcing shell 501, so that each component is more flexible during installation.

[0039] Please refer to Figures 6-8 The outer sides of the guide rod one 504, the guide rod two 506, and the guide rod three 508 are all provided with a limiting assembly, which can ensure that the guide rod does not displace excessively during installation. The limiting assembly is used to limit the guide rod one 504, the guide rod two 506, and the guide rod three 508 when they are connected, which can accurately install each guide rod at a predetermined position and avoid affecting the subsequent use effect due to inaccurate installation. The limiting assembly includes a guide plate one 505, a guide plate two 507, and a guide plate three 509. The outer side of the guide plate one 505 is fixedly connected to the outer side of the guide rod one 504, the outer side of the guide plate two 507 is fixedly connected to the outer side of the guide rod two 506, and the outer side of the guide plate three 509 is fixedly connected to the outer side of the guide rod three 508. The inner side of the guide reinforcing shell 501 is provided with a guide groove 502, which provides a specific space for the movement of the guide plate. The outer sides of the guide plate one 505, the guide plate two 507, and the guide plate three 509 are all slidingly connected to the inner wall of the guide groove 502, so that the guide plate can move smoothly in the guide groove 502.

[0040] Please refer to Figures 2-5 , the pressing mechanism 4 comprises a pressing plate 401, the pressing plate 401 is connected to the end plate, so that the spring 407 has pressure. The pressing plate 401 is fixedly connected with a plurality of symmetrical positioning rods 403 near one side of the single battery series group 1, the positioning rod 403 plays a role of positioning and connecting, so that the pressing block 408 can be firmly in the pressing groove 405. The upper end plate 2 and the lower end plate 3 are away from each other and are provided with a plurality of symmetrical pressing grooves 405, the pressing groove 405 provides a space for the pressing block 408. A plurality of pressing grooves 405 are provided with a plurality of pressing blocks 408, the pressing block 408 can exert pressure on the positioning rod 403 under the action of the spring, thereby realizing the pressing of the plurality of single battery series groups 1 and other components, the plurality of pressing blocks 408 can disperse the pressure, so that the pressing force is more uniform, and the reliability of the electric pile is improved. The outer wall of the pressing block 408 is provided with a spring 407, the spring can provide elastic force for the pressing block 408, so as to ensure that there is enough pressing force. The side of the pressing block 408 close to the spring 407 is provided with a positioning groove 402, the bottom of the positioning rod 403 is inserted into the inner wall of the positioning groove 402, and the positioning groove 402 can be accurately matched with the positioning rod 403, so that the position of the spring 407 is accurate.

[0041] Please refer to Figures 1-4 , the outer wall of the pressing plate 401 is provided with a connecting assembly one, the connecting assembly one is used for connecting the pressing plate 401 and the end plate, the connecting assembly one comprises four connecting blocks 404, the outer wall of the connecting block 404 is fixedly connected with the outer wall of the pressing plate 401, the connecting block 404 connects the end plate and the pressing plate 401, and the connection is more rapid and convenient. The upper end plate 2 and the lower end plate 3 are away from each other and are provided with a connecting groove 406 at the corresponding positions of the four corners, so that the connection process is more convenient and accurate. The outer wall of the connecting block 404 is inserted into the inner wall of the connecting groove 406, the end plate and the pressing plate 401 are connected, and the installation is convenient, rapid and convenient.

[0042] Please refer to Figure 1 , Figure 2 and Figure 4The connecting mechanism one 8 includes connecting plate one 801 and connecting plate two 803. The outer sides of the four connecting plate one 801 are fixedly connected to the outer sides of the short sides of the opposite compression plates 401, providing mounting positions for connecting the two compression plates 401. The outer sides of the four connecting plate two 803 are fixedly connected to the outer sides of the long sides of the opposite compression plates 401, providing mounting positions for connecting the two compression plates 401. The two connecting plate one 801 on the opposite sides are connected by connecting bolt one 802, which enables the opposite connecting plate one 801 to be firmly connected together, thereby achieving the connection and fixation of the two compression plates 401, and further connecting and fixing the two compression plates 401. The two connecting plate two 803 on the opposite sides are connected by connecting bolt two 804, which is similar to the connecting bolt one 802 and provides reliable connection between the connecting plate two 803, further enhancing the connection effect of the connecting mechanism one 8.

[0043] Please refer to Figures 1-3 The connecting mechanism two 9 includes L-shaped plate 901, which provides a specific connecting structure for the connecting mechanism two 9, 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 plate 901 at 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 the firm connection between the connecting mechanism two 9 and the end plates. The two L-shaped plates 901 are provided with connecting rods 902, which provide mounting positions for springs two 903. The connecting rods 902 are connected to the upper end plate 2 and the lower end plate 3 through the springs two 903, which connect and fix the upper end plate 2 and the lower end plate 3.

[0044] Please refer to Figures 1-3 One side of the upper end plate 2 and the lower end plate 3 is provided with electrolyte inlet 11, and the other side of the upper end plate 2 and the lower end plate 3 is provided with electrolyte outlet 12. The electrolyte inlet 11 and the electrolyte outlet 12 are prior art, and the electrolyte inlet 11 and the electrolyte outlet 12 are provided on both sides of the end plate, so that the electrolyte can flow smoothly into and out of the stack.

[0045] Please refer to Figures 1-2 The reinforcing mechanism 10 includes reinforcing plate 1001, which is connected to the upper end plate 2 and the lower end plate 3 through reinforcing bolt 1002. The side of the reinforcing plate 1001 close to the end plate is provided with connecting assembly two, which is used to connect the reinforcing plate 1001 with the upper end plate 2 and the lower end plate 3. The setting of the reinforcing plate 1001 can improve the overall structural strength of the stack, preventing deformation due to internal pressure or external impact during use. The connection through the reinforcing bolt 1002 ensures the firm and reliable connection between the reinforcing plate 1001 and the end plate.

[0046] Please refer to Figure 2 The connecting assembly two comprises two connecting plates 1003, the outer part of the connecting plate 1003 is fixedly connected to the reinforcing plate 1001 near one side of the end plate, and the connecting plate 1003 provides a specific connecting point for the connection of the reinforcing plate 1001 and the end plate. The outer side of the upper end plate 2 and the lower end plate 3 is provided with a connecting groove 1004, and the connecting groove 1004 provides an accurate installation position for the connecting plate 1003, so that the connecting process is more convenient and accurate. The outer part of the connecting plate 1003 is inserted and matched with the inner wall of the connecting groove 1004, so that the reinforcing plate 1001 is more rapid and convenient during installation.

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

[0048] S1, place the lower end plate 3 stably, then insert the lower end of the guide reinforcing shell 501 into the lower fixed groove 5011 in sequence, and slide one of the reinforcing plates 503 in the guide reinforcing shell 501 through the guide plate one 505 and the guide rod one 504, then contact the lower end plate 3, then slide one of the lower feed plates 7 in the guide reinforcing shell 501 through the guide plate two 507 and the guide rod two 506, then contact one of the reinforcing plates 503, then slide the installed single cell series 1 in the guide reinforcing shell 501 through the guide plate three 509 and the guide rod three 508, then contact one of the lower feed plates 7, then install the upper feed plate 6 and the other reinforcing plate 503 in the corresponding position in sequence, and the operation is the same as above. At this time, the upper fixed groove 5010 on the upper end plate 2 is inserted with the upper end of the corresponding guide reinforcing plate 503, the preliminary construction of the overall frame is completed, the relative position between the components is ensured to be accurate, and a foundation is laid for the stable operation of the stack.

[0049] S2, the plurality of connecting rods 902 are inserted into the through holes on the corresponding L-shaped plates 901, then the connecting rods 902 and the L-shaped plates 901 are connected through the spring two 903, and 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 the plurality of connecting plates 1003, then the reinforcing plate 1001 is fixed to the outer sides of the plurality of cell series assemblies through the 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 by the reinforcing bolts 1002, which further enhances the overall structural strength of the stack. The reinforcing plate 1001 can prevent the stack from deforming due to internal pressure or external impact during use, and improves the durability and safety of the stack.

[0051] S4, by placing one of the pressing plates 401 smoothly, then by inserting the positioning slot 402 on the pressing block 408 of the driving spring 407 into the corresponding positioning rod 403, then by connecting the connecting slot 406 on the lower end plate 3 with the connecting block 404 on one of the pressing plates 401, then the pressing block 408 can smoothly enter the pressing slot 405, at this time the pressing block 408 of the driving spring 407 is placed in the corresponding pressing slot 405 on the upper end plate 2, then the connecting block 404 on the other pressing plate 401 is inserted into the corresponding connecting slot 406 on the upper end plate 2, at this time the positioning rod 403 on the other pressing plate 401 can be conveniently inserted into the positioning slot 402 on the corresponding pressing block 408, so that the pressing plate 401 can effectively exert pressure on the internal structure, ensuring that the components such as single battery series 1 are in close contact, improving the electrical performance and stability of the stack. The setting of the spring 407 can provide elastic force for the pressing block 408, ensuring that there is always enough pressing force.

[0052] S5, by inserting the connecting bolt 802 into the through hole on the corresponding connecting plate 801, then connecting the connecting bolt 802 with the connecting plate 801 through the nut, so that the two pressing plates 401 can be firmly connected together, thereby better exerting uniform pressure on the internal structure of the stack. By inserting the connecting bolt 804 into the through hole on the corresponding connecting plate 803, then connecting the connecting bolt 804 with the connecting plate 803 through the nut, the use of the nut ensures the firmness of the connecting bolt.

[0053] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vanadium flow battery stack comprising a plurality of monolithic cell series (1), an upper end plate (2) and a lower end plate (3), characterised in that, The outer part of the upper end plate (2) and the lower end plate (3) is provided with a pressing mechanism (4), the outer wall of the pressing mechanism (4) is provided with a connecting mechanism one (8), the upper and lower sides of the single piece battery series connection group (1) are respectively provided with an upper feeding plate (6) and a lower feeding plate (7), the outer four corners of the single piece battery series connection group (1), the upper feeding plate (6) and the lower feeding plate (7) are provided with a guide strengthening mechanism (5), the outer four corners of the upper end plate (2) and the lower end plate (3) are provided with a connecting mechanism two (9), and the outer left and right sides of the single piece battery series connection group (1) are provided with a reinforcing mechanism (10); The guide strengthening mechanism (5) comprises a guide strengthening shell (501), the bottom of the upper end plate (2) is provided with an upper fixed groove (5010), the top of the lower end plate (3) is provided with a lower fixed groove (5011), the upper and lower ends of the guide strengthening shell (501) are respectively inserted into the inner walls of the upper fixed groove (5010) and the lower fixed groove (5011), the sides away from each other of the upper feeding plate (6) and the lower feeding plate (7) are provided with a reinforcing plate (503), the outer corners of the reinforcing plate (503) are fixedly connected with a guide rod one (504), the outer corners of the upper feeding plate (6) and the lower feeding plate (7) are fixedly connected with a guide rod two (506), and the outer corners of the single piece battery series connection group (1) are fixedly connected with a guide rod three (508); the outer sides of the guide rod one (504), the guide rod two (506) and the guide rod three (508) are slidably connected to the inner wall of the guide strengthening shell (501), and the outer sides of the guide rod one (504), the guide rod two (506) and the guide rod three (508) are provided with a limiting assembly; the limiting assembly is used for limiting the guide rod one (504), the guide rod two (506) and the guide rod three (508) when being connected; The limiting assembly comprises a guide plate one (505), a guide plate two (507) and a guide plate three (509), the outer side of the guide plate one (505) is fixedly connected to the outer side of the guide rod one (504), the outer side of the guide plate two (507) is fixedly connected to the outer side of the guide rod two (506), the outer side of the guide plate three (509) is fixedly connected to the outer side of the guide rod three (508), and the inner side of the guide strengthening shell (501) is provided with a guide groove (502); the outer sides of the guide plate one (505), the guide plate two (507) and the guide plate three (509) are slidably connected to the inner wall of the guide groove (502).

2. A vanadium flow battery stack according to claim 1, characterised in that, The pressing mechanism (4) comprises a pressing plate (401), a plurality of positioning rods (403) are fixedly connected to one side of the pressing plate (401) close to the single-piece battery series group (1), a plurality of pressing grooves (405) are formed in the sides of the upper end plate (2) and the lower end plate (3) away from each other, a plurality of pressing blocks (408) are arranged in the pressing grooves (405) in a corresponding manner, a spring (407) is arranged on the outer wall of the pressing block (408), a positioning groove (402) is formed in the side of the pressing block (408) close to the spring (407), the bottom of the positioning rod (403) is in plug-in fit with the inner wall of the positioning groove (402), and the outer wall of the pressing plate (401) is provided with a connecting assembly one.

3. A vanadium flow battery stack according to claim 2, characterised in that, The connecting assembly one comprises four connecting blocks (404), the outer sides of the connecting blocks (404) are fixedly connected to the outer wall of the pressing plate (401), and the sides of the upper end plate (2) and the lower end plate (3) away from each other are provided with connecting grooves (406) at the corresponding positions of the four corners.

4. A vanadium flow battery stack according to claim 3, characterised in that, The connecting mechanism one (8) comprises a connecting plate one (801) and a connecting plate two (803), the outer sides of the four connecting plate ones (801) are fixedly connected to the outer sides of the short sides of the pressing plate (401) in a corresponding manner, the outer sides of the four connecting plate twos (803) are fixedly connected to the outer sides of the long sides of the pressing plate (401) in a corresponding manner, the two connecting plate ones (801) on the opposite sides are connected through connecting bolts one (802), and the two connecting plate twos (803) on the opposite sides are connected through connecting bolts two (804).

5. A vanadium flow battery stack according to claim 4, characterised in that, The connecting mechanism two (9) comprises an L-shaped plate (901), 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), and a connecting rod (902) is arranged between the two L-shaped plates (901) and connected to the upper end plate (2) and the lower end plate (3) through a spring two (903).

6. A vanadium flow battery stack according to claim 5, characterised in that, The side of the upper end plate (2) and the side of the lower end plate (3) are provided with electrolyte inlets (11), and the other side of the upper end plate (2) and the other side of the lower end plate (3) are provided with electrolyte outlets (12).

7. A vanadium flow battery stack according to claim 6, characterised in that, The reinforcing mechanism (10) comprises a reinforcing plate (1001), the reinforcing plate (1001) is connected to the upper end plate (2) and the lower end plate (3) through reinforcing bolts (1002), and the side of the reinforcing plate (1001) close to the end plate is provided with a connecting assembly two.

8. A vanadium flow battery stack according to claim 7, characterised in that, The connecting assembly two comprises two connecting plates (1003), the outer sides of the connecting plates (1003) are fixedly connected to the side of the reinforcing plate (1001) close to the end plate, the outer sides of the upper end plate (2) and the lower end plate (3) are provided with connecting grooves (1004), and the outer sides of the connecting plates (1003) are in plug-in fit with the inner walls of the connecting grooves (1004).

9. A method of assembling a vanadium flow battery stack according to claim 8, characterised in that, The method comprises the following steps: S1, the lower end plate (3) is placed stably, then the lower end of the guide reinforcing shell (501) is inserted into the lower fixed slot (5011), one of the reinforcing plates (503) is slid in the guide reinforcing shell (501) through the guide plate one (505) and the guide rod one (504), then contacts the lower end plate (3), one of the lower feeding plates (7) is slid in the guide reinforcing shell (501) through the guide plate two (507) and the guide rod two (506), then contacts one of the reinforcing plates (503), the installed single battery series connection group (1) is slid in the guide reinforcing shell (501) through the guide plate three (509) and the guide rod three (508), then contacts one of the lower feeding plates (7), then the upper feeding plate (6) and the other reinforcing plate (503) are installed at the corresponding positions, and the operation is the same as above, and the upper fixed slot (5010) on the upper end plate (2) is inserted into the upper end of the corresponding guide reinforcing plate (503); S2, the plurality of connecting rods (902) are inserted into the through holes on the corresponding L-shaped plates (901), then the connecting rods (902) are connected with the L-shaped plates (901) through the second springs (903); S3, the reinforcing plates (1001) are connected with the connecting grooves (1004) on the corresponding upper end plates (2) and lower end plates (3) through the plurality of connecting plates (1003), then the reinforcing plates (1001) are fixed on the outer sides of the plurality of battery series connection assemblies through the reinforcing bolts (1002); S4, one of the pressing plates (401) is placed stably, then the positioning grooves (402) on the pressing blocks (408) of the plurality of driving springs one (407) are inserted into the corresponding positioning rods (403), then the plurality of connecting grooves (406) on the lower end plate (3) are connected with the connecting blocks (404) on one of the pressing plates (401), then the pressing blocks (408) can smoothly enter the pressing grooves (405), then the plurality of connecting blocks (404) on the other pressing plate (401) are inserted into the connecting grooves (406) on the corresponding upper end plate (2), then the plurality of positioning rods (403) on the other pressing plate (401) can be conveniently inserted into the positioning grooves (402) on the corresponding pressing blocks (408); S5, the plurality of connecting bolts one (802) are inserted into the through holes on the corresponding connecting plates one (801), then the connecting bolts one (802) are connected with the connecting plates one (801) through the nuts, the plurality of connecting bolts two (804) are inserted into the through holes on the corresponding connecting plates two (803), then the connecting bolts two (804) are connected with the connecting plates two (803) through the nuts.

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