Ion membrane automatic stacking equipment, battery stack stacking equipment and stacking method

Abstract

The present invention provides an automatic ion membrane stacking device, a stacking device and a stacking method. The automatic ion membrane stacking device includes a tray, a first winding roller, a second winding roller, a separation roller and a moving roller. The moving roller is located on the upper side of the tray in the vertical direction, and the separation roller is located on the side of the moving roller away from the tray; the first winding roller and the second winding roller are both located on the side of the separation roller away from the tray, and the first winding roller and the second winding roller are respectively located on both sides of the separation roller in the horizontal direction, the ion membrane is tensioned on the first winding roller, at least part of the separation roller is arranged between the ion exchange membrane and the back membrane to separate the two, and the moving roller can reciprocate between the first position and the second position along the surface of the tray to release the ion exchange membrane to the surface of the tray to form a Z-shaped stacked multilayer structure. The present invention can effectively improve the stacking efficiency of the ion exchange membrane and the stacking efficiency of the stack.

Description

Technical Field

[0001] The present invention relates to the field of liquid flow battery production and manufacturing, and in particular to an ion membrane automatic stacking device, a battery stack stacking device and a stacking method. Background Art

[0002] All-vanadium liquid flow batteries have broad application prospects in the fields of new energy access and smart grid construction due to their advantages of independent power capacity design, safe operation, long service life, environmental friendliness, and recyclable electrolyte. All-vanadium liquid flow batteries are composed of two end plates, inlet and outlet plates, current collecting plates, carbon felt electrodes, electrode frames, bipolar plates, ion exchange membranes, etc. The above components are stacked in a certain order and then pressed and locked by a press to complete the assembly of the battery stack.

[0003] Most of the existing vanadium liquid flow battery stacks rely on manual assembly, and it takes an average of 2 to 3 hours to complete a battery stack, which has low production efficiency. With the improvement and development of technology, some structures can now be stacked automatically. However, due to the soft and thin characteristics of the ion exchange membrane after cutting, the pick-up and placement operations through the transmission grabbing equipment are prone to wrinkles and inaccurate placement. As a result, the automated equipment still requires manual participation and has low production efficiency.

[0004] It can be seen that the prior art has the problems of low efficiency in the ion exchange membrane stacking process and low efficiency in the battery stack stacking process. Summary of the invention

[0005] The present invention provides an ion membrane automatic stacking device, a battery stack stacking device and a stacking method, which solve the problems of low efficiency in the ion exchange membrane stacking process and low efficiency in the battery stack stacking process in the prior art.

[0006] The invention provides an automatic ion membrane stacking device, comprising a tray, a first winding roller, a second winding roller, a separation roller and a moving roller; the ion membrane comprises an ion exchange membrane and a back membrane which are pasted together.

[0007] The moving roller is located on the upper side of the tray in the vertical direction, and the separating roller is located on the side of the moving roller away from the tray; the first winding roller and the second winding roller are both located on the side of the separating roller away from the tray, and the first winding roller and the second winding roller are respectively located on both sides of the separating roller in the horizontal direction, the ion membrane is tensioned on the first winding roller, at least part of the separating roller is arranged between the ion exchange membrane and the back membrane to separate the two, the back membrane separated from the ion exchange membrane is tensioned on the second winding roller, and the ion exchange membrane separated from the back membrane is tensioned on the separating roller and the moving roller.

[0008] The moving roller can reciprocate between a first position and a second position along the surface of the tray to release the ion exchange membrane between the moving roller and the tray to the surface of the tray and form a Z-shaped stacked multi-layer structure.

[0009] The present invention can automatically peel the ion membrane and form a Z-shaped stacked multilayer structure through the first winding roller, the second winding roller, the separation roller and the moving roller. On the one hand, it eliminates the cutting process of the ion membrane, greatly shortens the production cycle, and improves the stacking efficiency of the ion exchange membrane. On the other hand, it does not require manual assembly of the soft sheet ion membrane, avoids problems such as wrinkles and inaccurate placement caused by manual operation, further improves the stacking efficiency of the ion exchange membrane, and thus helps to improve the stacking efficiency of the liquid flow battery stack.

[0010] Optionally, the ion membrane automatic stacking device further includes a driving unit, a first fixing member and a second fixing member;

[0011] The first fixing member and the second fixing member are arranged relatively spaced apart along the extending direction of the moving roller, and the driving part is connected to the first fixing member and the second fixing member to drive the first fixing member and the second fixing member to move between the pressing position and the non-pressing position.

[0012] When the first fixing member and the second fixing member are in the pressing position, the ion exchange membrane released to the surface of the tray is pressed against the surface of the tray.

[0013] The embodiment of the present invention can prevent the ion exchange membrane from wrinkling during the folding process by disposing the first fixing member and the second fixing member, thereby improving the accuracy of ion exchange membrane stacking.

[0014] Optionally, the cross-sectional shapes of the first fixing member and the second fixing member are both L-shaped;

[0015] When the first fixing member and the second fixing member are in the pressing position, the first fixing member and the second fixing member overlap toward the inner wall of the tray and press the ion exchange membrane on the corresponding edge of the tray and the surface of the tray.

[0016] Optionally, there are multiple moving rollers, which are arranged at intervals in the vertical direction and move synchronously.

[0017] The present invention also provides a stacking device for a flow battery stack, including the automatic ion membrane stacking device involved in the above-mentioned embodiments and possible implementations. It also includes a synchronous belt, a tray is arranged on the synchronous belt, and the synchronous belt is used to transfer the tray from the initial station to the target station; the automatic ion membrane stacking device is located between the initial station and the target station.

[0018] The present invention can automatically stack ion exchange membranes through ion membrane automatic stacking equipment, and can use a synchronous belt to achieve material transfer and stacking without manual intervention, thereby significantly improving the stacking efficiency of the flow battery stack.

[0019] The present invention also provides a stacking method for a flow battery stack, which is stacked using the stacking device for the flow battery stack. The flow battery stack includes a lower end plate, a lower liquid inlet and outlet plate, a lower current collecting plate, a lower electrode frame composite, an upper electrode frame composite, an upper current collecting plate, an upper liquid inlet and outlet plate, and an upper end plate; the stacking method includes:

[0020] Step S1: Control the synchronous belt to transfer the tray to the initial station, and stack the lower end plate, the lower inlet and outlet plate, the lower collecting plate and the lower electrode frame composite to form an initial stack; wherein the lower electrode frame composite includes a stacked lower bipolar plate, a lower electrode frame and a lower graphite felt, and the lower graphite felt is embedded in the lower electrode frame.

[0021] Step S2: Control the synchronous belt to transfer the tray and the initial stack to the folding station, and use the ion membrane automatic stacking equipment to perform the ion membrane stacking process to form an ion membrane stack on the surface of the initial stack. The ion membrane stack includes an upper graphite felt, an ion exchange membrane and a plurality of graphite felt stacks arranged in layers, and the ion exchange membrane is a multilayer structure stacked in a Z shape.

[0022] Step S3: Control the synchronous belt to transfer the tray, the initial stack and the ion membrane stack to the target station, and stack the upper electrode frame composite, the upper current collecting plate, the upper inlet and outlet plate and the upper end plate and place them on the surface of the ion membrane stack to form a target stack. The upper electrode frame composite includes a stacked upper bipolar plate, an upper electrode frame and an upper graphite felt, and the upper graphite felt is embedded in the upper electrode frame.

[0023] The stacking method of the liquid flow battery stack provided by the present invention avoids stacking electrode frame units, ion exchange membranes, graphite felt and other materials one by one, and there is no need to cut the ion exchange membrane. The ion exchange membrane is placed in a Z-shaped folding manner, thereby avoiding problems such as wrinkles and inaccurate positioning when the single ion exchange membrane is folded, and significantly improving the stacking efficiency of the liquid flow battery stack.

[0024] Optionally, the initial station includes a first station and a second station, and step S1 includes:

[0025] Step S11: Control the synchronous belt to transfer the tray to the first station, and stack the lower end plate and the lower inlet and outlet plate in sequence and place them on the surface of the tray to form a first stack.

[0026] Step S12: controlling the synchronous belt to transfer the tray and the first stack to the second station, and sequentially stacking the lower current collecting plate and the lower electrode frame composite and placing them on the surface of the first stack to form an initial stack.

[0027] Optionally, a graphite felt stack is provided between every two layers of ion exchange membranes in the ion membrane stack, and the graphite felt stack includes a first graphite felt, a bipolar plate, a double-layer electrode frame, and a second graphite felt that are stacked. The first graphite felt is embedded in a first side of the double-layer electrode frame, the second graphite felt is embedded in a second side of the double-layer electrode frame opposite to the first side, and the bipolar plate is located between the first graphite felt and the second graphite felt; the upper graphite felt is stacked on the topmost surface of the Z-shaped stacked multilayer structure.

[0028] Optionally, the plurality of graphite felt stacks include a first graphite felt stack and a second graphite felt stack; and using an ion membrane automatic stacking device to perform an ion membrane stacking process to form an ion membrane stack on the surface of an initial stack includes:

[0029] Step S21: driving the moving roller to move from the first position to the second position to form a first layer of ion exchange membrane.

[0030] Step S22: stacking a first graphite felt stack on the surface of the first ion exchange membrane;

[0031] Step S23: driving the movable roller to move from the second position to the first position to form a second layer of ion exchange membrane.

[0032] Step S24: stacking a second graphite felt stack on the surface of the second ion exchange membrane;

[0033] Step S25: driving the moving roller to move from the first position to the second position to form a third ion exchange membrane.

[0034] Step S26: stacking the upper graphite felt layer on the surface of the third ion exchange membrane layer.

[0035] Optionally, after step S3, the method further includes:

[0036] Step S4: Control the synchronous belt to transfer the tray and the target stacked parts to the press-fitting station, and press-fit the target stacked parts through the stack press to form the stacked parts to be locked.

[0037] Step S5: Control the synchronous belt to transport the tray and the stacked pieces to be locked to the locking station, and lock and fix the stacked pieces to be locked by the locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1a~Figure 1f This is a schematic diagram of the structure of an automatic ion membrane stacking device according to an embodiment of the present invention;

[0039] Figure 2 It is a schematic structural diagram of a first fixing member and a second fixing member in an automatic ion membrane stacking device according to an embodiment of the present invention;

[0040] Figure 3It is a schematic diagram of a workpiece flow process of a stacking device for a liquid flow battery stack according to an embodiment of the present invention;

[0041] Figure 4a A schematic diagram of the three-dimensional structure of the lower electrode frame composite member in an embodiment of the present invention;

[0042] Figure 4b Schematic diagram of the cross-sectional structure of the lower electrode frame composite member in an embodiment of the present invention;

[0043] Figure 5a Schematic diagram of the three-dimensional structure of the graphite felt stack in an embodiment of the present invention;

[0044] Figure 5b Schematic diagram of the cross-sectional structure of a graphite felt stack in an embodiment of the present invention;

[0045] Figure 6 It is a schematic cross-sectional structural diagram of a target stack of a flow battery stack in an embodiment of the present invention;

[0046] Figure 7 Schematic diagram 1 of the process structure of the stacking method of the flow battery stack according to the embodiment of the present invention;

[0047] Figure 8 The schematic diagram of the process structure of the stacking method of the flow battery stack in the embodiment of the present invention is as follows Figure 2 ;

[0048] Fig. 9 The schematic diagram of the process structure of the stacking method of the flow battery stack in the embodiment of the present invention is as follows Figure 3 ;

[0049] Fig.10 Schematic diagram 4 of the process structure of the stacking method of the liquid flow battery stack in the embodiment of the present invention.

[0050] Description of reference numerals:

[0051] 1: Ion membrane automatic stacking equipment;

[0052] 10: tray; 101: first fixing member; 102: second fixing member; 103: first tension spring; 11: first winding roller; 12: second winding roller; 13: separation roller; 14: moving roller;

[0053] 2: ion membrane; 21: ion exchange membrane; 22: back membrane; 232: graphite felt stack; 2321: first graphite felt; 2322: second graphite felt; 2323: bipolar plate; 2324: double-layer electrode frame;

[0054] 241: lower end plate; 242: lower inlet and outlet plate; 243: lower current collecting plate; 244: lower electrode frame composite; 2441: lower bipolar plate; 2442: lower electrode frame; 2443: lower graphite felt; 251: upper end plate; 252: upper inlet and outlet plate; 253: upper current collecting plate; 254: upper electrode frame composite;

[0055] 3: Stacking equipment for flow battery stacks; 31: Synchronous belt; 321a: First unloading car; 321b: Second unloading car; 322a: Third unloading car; 322b: Fourth unloading car; 323a: Fifth unloading car; 323b: Sixth unloading car; 324a: Seventh unloading car; 324b: Eighth unloading car; 325a: Ninth unloading car; 325b: Tenth unloading car; 326: Stack press; 327: Locking device. DETAILED DESCRIPTION

[0056] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0057] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0058] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0060] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0061] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0062] See also Figure 1a~Figure 1f The automatic ion membrane stacking device 1 provided by the present invention comprises a tray 10, a first winding roller 11, a second winding roller 12, a separation roller 13 and a moving roller 14. The ion membrane 2 comprises an ion exchange membrane 21 and a back membrane 22 which are attached together.

[0063] like Figure 1a As shown, the moving roller 14 is located on the upper side of the tray 10 in the vertical direction, and the separating roller 13 is located on the side of the moving roller 14 away from the tray 10. The first winding roller 11 and the second winding roller 12 are both located on the side of the separating roller 13 away from the tray 10, and the first winding roller 11 and the second winding roller 12 are respectively located on both sides of the separating roller 13 in the horizontal direction, the ion membrane 2 (which can be understood as the roll material not separated from the back membrane) is stretched on the first winding roller 11, at least part of the separating roller 13 is arranged between the ion exchange membrane 21 and the back membrane 22 to separate the two, the back membrane 22 separated from the ion exchange membrane 21 is stretched on the second winding roller 12, and the ion exchange membrane 21 separated from the back membrane 22 is stretched on the separating roller 13 and the moving roller 14.

[0064] The moving roller 14 can reciprocate between the first position and the second position along the surface of the tray 10 to release the ion exchange membrane 21 between the moving roller 14 and the tray 10 to the surface of the tray 10, and form a Z-shaped stacked multilayer structure. The first position and the second position can be, for example, two opposite sides of the tray 10, such as two opposite sides along the length direction or two sides along the width direction. In other alternative embodiments, they can also be any position of the tray 10, as long as the ion exchange membrane 21 can be released to the tray surface in a Z shape, it does not depart from the scope of the embodiment of the present invention.

[0065] The present invention can automatically peel the ion membrane and form a Z-shaped stacked multilayer structure through the first winding roller 11, the second winding roller 12, the separation roller 13 and the moving roller 14. On the one hand, the cutting process of the ion membrane is eliminated, the production cycle is greatly shortened, and the stacking efficiency of the ion exchange membrane is improved. On the other hand, there is no need for manual assembly of the soft sheet ion membrane, which avoids problems such as wrinkles and inaccurate placement caused by manual operation, further improving the stacking efficiency of the ion exchange membrane, and thus helping to improve the stacking efficiency of the liquid flow battery stack.

[0066] In one implementation, see Figure 2 , and combined with Figure 1a~Figure 1fIt is understood that the ion membrane automatic stacking device 1 also includes a driving unit (not shown in the figure), a first fixing member 101 and a second fixing member 102. The first fixing member 101 and the second fixing member 102 are arranged relatively spaced along the extension direction of the moving roller 14, and the driving unit (not shown in the figure) is connected to the first fixing member 101 and the second fixing member 102 to drive the first fixing member 101 and the second fixing member 102 to move between the pressing position and the non-pressing position. When the first fixing member 101 and the second fixing member 102 are in the pressing position, the ion exchange membrane 21 released to the surface of the tray 10 is pressed against the surface of the tray 10.

[0067] The driving part can be, for example, a cylinder, a driving motor, an actuator, etc., which is not limited in the present invention. The pressing position can be understood as: the first fixing member 101 and the second fixing member 102 are facing the surface of the tray 10 to abut at least part of the ion exchange membrane 21 against the surface of the tray 10. Therefore, it can be understood by those skilled in the art that the driving part can drive the first fixing member 101 and the second fixing member 102 away from or close to the surface of the tray 10. At the same time, as the number of folded layers of the ion exchange membrane 21 increases, its thickness increases, and the driving part can drive the first fixing member 101 and the second fixing member 102 to move along the thickness direction of the ion exchange membrane 21 (or can be understood as the height direction of the flow battery stack).

[0068] The shape and quantity of the first fixing member 101 and the second fixing member 102 are not limited. In one embodiment, the first fixing member 101 and the second fixing member 102 may be, for example, a planar sheet structure. In other alternative embodiments, they may also be a bent sheet structure, such as an L-shape, a U-shape, etc. In an exemplary embodiment, the cross-sectional shape of the first fixing member 101 and the second fixing member 102 are both L-shaped. When the first fixing member 101 and the second fixing member 102 are in the pressing position, the first fixing member 101 and the second fixing member 102 overlap toward the inner wall of the tray 10 and press against the corresponding edge of the tray and the ion exchange membrane 21 on the surface of the tray.

[0069] Furthermore, the number of the first fixing member 101 and the second fixing member 102 may be one or more. The extension length of one first fixing member 101 (or second fixing member 102) may be greater than the side length of the tray 10, or may be less than or equal to the side length of the tray 10. Figure 2 As shown, the number of the first fixing member 101 and the number of the second fixing member 102 are both two, and their shapes are L-shaped sheet structures.

[0070] In the embodiment of the present invention, the first fixing member and the second fixing member are arranged to prevent the ion exchange membrane 21 from wrinkling during the folding process, thereby improving the stacking accuracy of the ion exchange membrane 21 .

[0071] Further, in one embodiment, see Figure 1a There are multiple moving rollers 14, which are arranged at intervals in the vertical direction and move synchronously. The multiple moving rollers 14 can increase the stretching degree of the ion exchange membrane 21 and further avoid wrinkles.

[0072] The present invention also provides a stacking device 3 for a flow battery stack, such as Figure 3 As shown, the automatic ion membrane stacking equipment 1 involved in the above-mentioned embodiments and possible implementation methods also includes a synchronous belt 31, and the tray 10 is arranged on the synchronous belt 31. The synchronous belt 31 is used to transport the tray from the initial station to the target station. The automatic ion membrane stacking equipment 1 is located between the initial station and the target station.

[0073] In one embodiment, the stacking device 3 of the flow battery stack further includes a plurality of unloading vehicles (e.g. Figure 3 As shown in the figure, there are the first unloading trolley 321a to the tenth unloading trolley 325b, and multiple unloading trolleys are arranged at intervals on both sides of the synchronous belt 31 along the extension direction of the synchronous belt 31, and are used to transport and grab stacked materials (such as the lower end plate 241, the lower liquid inlet and outlet plate 242, the lower collecting plate 243, the lower electrode frame composite 244, the upper electrode frame composite 254, the upper collecting plate 253, the upper liquid inlet and outlet plate 252, the upper end plate 251, etc. mentioned later) to the designated position on the synchronous belt 31.

[0074] The present invention can automatically stack ion exchange membranes 21 through the ion membrane automatic stacking device 1, and can use the synchronous belt 31 to realize material transfer and stacking without manual intervention, thereby significantly improving the stacking efficiency of the flow battery stack.

[0075] The present invention also provides a method for stacking a flow battery stack, see Figure 7 , and combined with Figure 3 , Figure 4a~Figure 5b as well as Figure 6 Understand. Figure 6 As shown, the flow battery stack includes a lower end plate 241, a lower liquid inlet and outlet plate 242, a lower current collecting plate 243, a lower electrode frame composite 244, an upper electrode frame composite 254, an upper current collecting plate 253, an upper liquid inlet and outlet plate 252, and an upper end plate 251. The stacking method includes:

[0076] Step S1: Control the synchronous belt 31 to transfer the tray to the initial station, and stack the lower end plate 241, the lower liquid inlet and outlet plate 242, the lower current collecting plate 243 and the lower electrode frame composite part 244 to form an initial stack.

[0077] Among them, Figure 4a and Figure 4bAs shown, the lower electrode frame composite 244 includes a lower bipolar plate 2441 , a lower electrode frame 2442 and a lower graphite felt 2443 which are stacked, and the lower graphite felt 2443 is embedded in the lower electrode frame 2442 .

[0078] Step S2: controlling the synchronous belt 31 to transfer the tray and the initial stack to the folding station, and using the ion membrane automatic stacking equipment to perform the ion membrane stacking process to form the ion membrane stack on the surface of the initial stack.

[0079] The ion membrane stack includes an upper graphite felt, an ion exchange membrane 21 and a plurality of graphite felt stacks 232, wherein the ion exchange membrane 21 is a multilayer structure stacked in a Z shape (eg Figure 6 as shown).

[0080] Step S3: Control the synchronous belt 31 to transport the tray, the initial stack and the ion membrane stack to the target station, and stack the upper electrode frame composite 254, the upper current collecting plate 253, the upper liquid inlet and outlet plate 252 and the upper end plate 251 and place them on the surface of the ion membrane stack to form a target stack.

[0081] The upper electrode frame composite part 254 has a similar structure to the lower electrode frame composite part 244 , and includes a stacked upper bipolar plate, an upper electrode frame and an upper graphite felt, wherein the upper graphite felt is embedded in the upper electrode frame.

[0082] The stacking method of the liquid flow battery stack provided by the present invention avoids stacking the electrode frame, the ion exchange membrane 21, the graphite felt and other materials one by one, and there is no need to cut the ion exchange membrane. The ion exchange membrane is placed in a Z-shaped folding manner, thereby avoiding the problems of wrinkles and inaccurate positioning generated when the ion exchange membrane 21 is folded as a single piece, and significantly improving the stacking efficiency of the liquid flow battery stack.

[0083] For details, see Figure 5a and Figure 5b , and combined with Figure 6 It is understood that a graphite felt stack 232 is provided between every two layers of ion exchange membranes 21 in the ion membrane stack, and the graphite felt stack 232 includes a first graphite felt 2321, a bipolar plate 2323, a double-layer electrode frame 2324, and a second graphite felt 2322 that are stacked. The first graphite felt 2321 is embedded in the first side of the double-layer electrode frame 2324, the second graphite felt 2322 is embedded in the second side of the double-layer electrode frame 2324 opposite to the first side, and the bipolar plate 2323 is located between the first graphite felt 2321 and the second graphite felt 2322. The upper graphite felt is stacked on the topmost surface of the Z-shaped stacked multilayer structure.

[0084] In one embodiment, if Figure 3 As shown, the initial station includes the first station and the second station, and then, see Figure 8, step S1 comprises:

[0085] Step S11: Control the synchronous belt 31 to transfer the tray to the first station, and stack the lower end plate 241 and the lower liquid inlet and outlet plate 242 in sequence and place them on the surface of the tray to form a first stack;

[0086] Step S12: controlling the synchronous belt 31 to transfer the tray and the first stack to the second station, and sequentially stacking the lower current collecting plate 243 and the lower electrode frame composite 244 on the surface of the first stack to form an initial stack.

[0087] It can be understood by those skilled in the art that the number of folded layers of the ion exchange membrane 21 can be set as needed, and thus the number of graphite felt stacks 232 between every two layers of ion exchange membranes varies according to the number of layers of the ion exchange membrane 21. In one embodiment, the number of layers of the ion exchange membrane 21 is three, and thus the number of graphite felt stacks is two, including a first graphite felt stack and a second graphite felt stack.

[0088] See also Fig. 9 , step S2 comprises:

[0089] Step S20: Control the synchronous belt to transfer the tray and the initial stack to the folding station.

[0090] The step S2 of using the ion membrane automatic stacking equipment to perform the ion membrane stacking process to form an ion membrane stack on the surface of the initial stack includes:

[0091] Step S21: driving the moving roller to move from the first position to the second position to form a first layer of ion exchange membrane;

[0092] Step S22: stacking a first graphite felt stack on the surface of the first ion exchange membrane;

[0093] Step S23: driving the movable roller to move from the second position to the first position to form a second layer of ion exchange membrane;

[0094] Step S24: stacking a second graphite felt stack on the surface of the second ion exchange membrane;

[0095] Step S25: driving the moving roller to move from the first position to the second position to form a third layer of ion exchange membrane;

[0096] Step S26: stacking the upper graphite felt layer on the surface of the third ion exchange membrane layer.

[0097] An example of the folding process is as follows. Figure 1a~Figure 1f , Figure 3 and Figure 6 understand:

[0098] The rolled ion membrane is unwound by the first winding roller 11 to obtain the ion membrane 2 with the backing membrane 22, and then separated by the separation roller 13 to obtain the separated backing membrane 22 and the ion exchange membrane 21, wherein the backing membrane 22 is recovered and collected by the second winding roller 12. The ion exchange membrane 21 is stacked by changing the position of the ion exchange membrane 21 by moving the moving roller 14 left and right. Before the tray 10 is transferred to the folding station, the state of the ion membrane automatic stacking device 1 is as follows: Figure 1a As shown, when the tray 10 is moved to the folding station, the state of the ion membrane automatic stacking device 1 is as follows: Figure 1b As shown, the moving roller 14 moves rightward to the first position, and the first fixing member 101 presses the edge of the ion exchange membrane 21 (as shown in FIG. Figure 1c As shown in FIG. 1 ), at this time, a graphite felt stack 232 is stacked on the surface of the ion exchange membrane by the fifth unloading car 323a and the sixth unloading car 323b. Then the moving roller 14 moves leftward to the second position, and the second fixing member 102 presses the edge of the ion exchange membrane 21 (as shown in FIG. 1 ). Figure 1d As shown in the figure, a graphite felt stack 232 is stacked on the surface of the ion exchange membrane, and the above steps can be repeated until the set number of stacking layers is reached. The last layer of ion exchange membrane 21 is moved to the second position under the drive of the moving roller 14, and the second fixing member 102 presses the edge of the ion exchange membrane to cut the ion exchange membrane according to the setting. Then the upper layer of graphite felt is grabbed and stacked on top of the last layer of ion exchange membrane. At this point, the Z-shaped folding of the ion exchange membrane at the folding station is completed.

[0099] Further, in one embodiment, if Figure 3 As shown, the above-mentioned target stations may include a third station and a fourth station, and then the upper electrode frame composite 254, the upper current collecting plate 253, the upper liquid inlet and outlet plate 252 and the upper end plate 251 are stacked in batches on the third station and the fourth station, and the specific stacking process is similar to step S11 and step S12.

[0100] Further, in one embodiment, see Fig.10 , and combined with Figure 3 It is understood that after step S3, it also includes:

[0101] Step S4: Control the synchronous belt 31 to transfer the tray 10 and the target stack to the press-fitting station, and press-fit the target stack through the stack press 326 to form a stack to be locked;

[0102] Step S5: Control the synchronous belt 31 to transport the tray 10 and the stacked pieces to be locked to the locking station, and lock and fix the stacked pieces to be locked by the locking device 327.

[0103] The locking device 327 can be understood as an automatic twisting device, such as a manipulator, etc., to install and lock the fixing member (such as a bolt, etc.) to the stacking member. It can also be understood as a wrench for locking.

[0104] The following is an example of the stacking process of the flow battery stack, please refer to Figure 1a~Figure 1f , Figure 3 as well as Figure 6 understand.

[0105] The overall running direction of the synchronous belt 31 is from left to right. First, step S11 is performed, that is, the tray 10 is transferred to the first station, the lower end plate 241 is clamped and transported from the first unloading car 321a of the equipment to the tray 10, and then the lower inlet and outlet plate 242 is clamped and transported from the second unloading car 321b of the equipment to the tray 10, and stacked on the lower end plate 241. Then step S12 is performed, that is, the tray 10 is transferred to the second station, the lower current collecting plate 243 is clamped and transported from the third unloading car 322a to the tray 10, and stacked on the lower inlet and outlet plate 242, and then the lower electrode frame composite 244 (including the lower bipolar plate 2441, the lower electrode frame 2442 and the lower graphite felt 2443) is clamped and transported from the fourth unloading car 322b of the equipment to the tray 10, and stacked on the lower current collecting plate 243. Then, step S2 is performed, the tray 10 is transferred to the folding station, and the graphite felt stack 232, the upper graphite felt and the ion exchange membrane 21 are folded in a Z shape. After folding the required number of layers, the ion exchange membrane 21 is cut.

[0106] Then, step S3 is performed, that is, the tray 10 is transferred to the third station, and the upper electrode frame composite 254 (with the same structure as the lower electrode frame composite 244) is clamped and transported from the seventh unloading car 324a to the tray 10, and stacked on the upper part of the stacking completed in the previous station; the upper current collecting plate 253 is clamped and transported from the eighth unloading car 324b to the tray 10, and stacked on the upper electrode frame composite 254. Next, the tray 10 is transferred to the fourth station, and the upper inlet and outlet plate 252 is clamped and transported from the ninth unloading car 325a to the tray 10, and stacked on the upper current collecting plate 253. The upper end plate 251 is clamped and transported from the tenth unloading car 325b to the tray 10, and stacked on the upper inlet and outlet plate 252.

[0107] Then, step S4 is executed, the tray 10 is transferred to the press-fitting station, the stack press 326 performs press-fitting, and completes the locking of bolts and nuts and air tightness test. Then, step S5 is executed, the tray 10 is transferred to the locking station, and after being locked by the locking device 327, the stack is turned over and taken off the line.

[0108] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An ion membrane automatic stacking device, characterized in that: It includes a tray, a first winding roller, a second winding roller, a separation roller and a moving roller; the ion membrane includes an ion exchange membrane and a back membrane that are attached together; The moving roller is located on the upper side of the tray in the vertical direction, and the separating roller is located on the side of the moving roller away from the tray; the first winding roller and the second winding roller are both located on the side of the separating roller away from the tray, and the first winding roller and the second winding roller are respectively located on both sides of the separating roller in the horizontal direction, the ion membrane is tensioned on the first winding roller, at least part of the separating roller is arranged between the ion exchange membrane and the back membrane to separate the two, the back membrane separated from the ion exchange membrane is tensioned on the second winding roller, and the ion exchange membrane separated from the back membrane is tensioned on the separating roller and the moving roller; The moving roller can reciprocate between a first position and a second position along the surface of the tray to release the ion exchange membrane between the moving roller and the tray to the surface of the tray and form a Z-shaped stacked multi-layer structure.

2. The automatic ion membrane stacking device according to claim 1, characterized in that: It also includes a driving part, a first fixing member and a second fixing member; The first fixing member and the second fixing member are arranged relatively spaced apart along the extending direction of the moving roller, and the driving part is connected to the first fixing member and the second fixing member to drive the first fixing member and the second fixing member to move between a pressing position and a non-pressing position; When the first fixing member and the second fixing member are in the pressing position, the ion exchange membrane released to the surface of the tray is pressed against the surface of the tray.

3. The automatic ion membrane stacking device according to claim 2, characterized in that: The cross-sectional shapes of the first fixing member and the second fixing member are both L-shaped; When the first fixing member and the second fixing member are in the pressing position, the first fixing member and the second fixing member overlap toward the inner wall of the tray and press against the corresponding edge of the tray and the ion exchange membrane on the surface of the tray.

4. The automatic ion membrane stacking device according to claim 1, characterized in that: There are multiple moving rollers, which are arranged at intervals along the vertical direction and move synchronously.

5. A stacking device for a flow battery stack, characterized in that: It comprises the automatic ion membrane stacking equipment as described in any one of claims 1 to 4; it also comprises a synchronous belt, the tray is arranged on the synchronous belt, and the synchronous belt is used to transport the tray from an initial station to a target station; the automatic ion membrane stacking equipment is located between the initial station and the target station.

6. A method for stacking a flow battery stack, characterized in that: Using the stacking device for liquid flow battery stacks as claimed in claim 5 for stacking; The flow battery stack comprises a lower end plate, a lower liquid inlet and outlet plate, a lower current collecting plate, a lower electrode frame composite, an upper electrode frame composite, an upper current collecting plate, an upper liquid inlet and outlet plate, and an upper end plate; the stacking method comprises: Step S1: controlling the synchronous belt to transfer the tray to the initial station, and stacking the lower end plate, the lower inlet and outlet plate, the lower current collecting plate and the lower electrode frame composite to form an initial stack; wherein the lower electrode frame composite comprises a stacked lower bipolar plate, a lower electrode frame and a lower graphite felt, and the lower graphite felt is embedded in the lower electrode frame; Step S2: controlling the synchronous belt to transfer the tray and the initial stack to the folding station, and using the ion membrane automatic stacking equipment to perform an ion membrane stacking process to form an ion membrane stack on the surface of the initial stack; wherein the ion membrane stack includes an upper graphite felt, an ion exchange membrane and a plurality of graphite felt stacks arranged in layers, and the ion exchange membrane is a multilayer structure stacked in a Z shape; Step S3: Control the synchronous belt to transport the tray, the initial stack and the ion membrane stack to the target workstation, and stack the upper electrode frame composite, the upper current collecting plate, the upper inlet and outlet plate and the upper end plate and place them on the surface of the ion membrane stack to form a target stack; wherein the upper electrode frame composite includes a stacked upper bipolar plate, an upper electrode frame and an upper graphite felt, and the upper graphite felt is embedded in the upper electrode frame.

7. The method for stacking a flow battery stack according to claim 6, characterized in that: The initial station includes a first station and a second station, and the step S1 includes: Step S11: controlling the synchronous belt to transfer the tray to the first station, and sequentially stacking the lower end plate and the lower liquid inlet and outlet plate and placing them on the surface of the tray to form a first stack; Step S12: controlling the synchronous belt to transfer the tray and the first stack to the second station, and sequentially stacking the lower current collecting plate and the lower electrode frame composite and placing them on the surface of the first stack to form the initial stack.

8. The method for stacking a flow battery stack according to claim 6, characterized in that: A graphite felt stack is provided between every two layers of ion exchange membranes in the ion membrane stack, and the graphite felt stack includes a first graphite felt, a bipolar plate, a double-layer electrode frame and a second graphite felt that are stacked; the first graphite felt is embedded in the first side of the double-layer electrode frame, the second graphite felt is embedded in the second side of the double-layer electrode frame opposite to the first side, and the bipolar plate is located between the first graphite felt and the second graphite felt; the upper graphite felt is stacked on the topmost surface of the Z-shaped stacked multilayer structure.

9. The method for stacking a flow battery stack according to claim 8, characterized in that: The plurality of graphite felt stacks include a first graphite felt stack and a second graphite felt stack; The method of using the ion membrane automatic stacking device to perform an ion membrane stacking process to form an ion membrane stack on the surface of the initial stack includes: Step S21: driving the moving roller to move from the first position to the second position to form a first layer of ion exchange membrane; Step S22: stacking the first graphite felt stack on the surface of the first ion exchange membrane; Step S23: driving the movable roller to move from the second position to the first position to form a second layer of ion exchange membrane; Step S24: stacking the second graphite felt stack on the surface of the second ion exchange membrane; Step S25: driving the moving roller to move from the first position to the second position to form a third layer of ion exchange membrane; Step S26: stacking the upper graphite felt layer on the surface of the third ion exchange membrane layer.

10. The method for stacking a flow battery stack according to claim 6, characterized in that: After step S3, the method further includes: Step S4: controlling the synchronous belt to convey the tray and the target stacked component to a press-fitting station, and performing press-fitting on the target stacked component through a stack press to form a stacked component to be locked; Step S5: Control the synchronous belt to transport the tray and the stacked pieces to be locked to the locking station, and lock and fix the stacked pieces to be locked by a locking device.

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