Pole piece compounding device and battery cell winding equipment

Abstract

The utility model discloses a pole piece compounding device and battery cell winding equipment. The pole piece compounding device comprises a first pole piece unwinding assembly, a first diaphragm unwinding assembly, a second diaphragm unwinding assembly and a compounding assembly, the composite assembly is used for compounding the first pole piece, the first diaphragm and the second diaphragm to form a composite material belt; in the conveying direction of the first pole pieces, a clamping and cutting assembly and a rubberizing assembly are arranged between the first pole piece unwinding assembly and the compounding assembly, and the clamping and cutting assembly is used for cutting off the first pole pieces and pulling a gap between every two adjacent cut-off first pole pieces; the rubberizing assembly is used for bonding two adjacent cut first pole pieces through an adhesive tape and keeping a gap between the two adjacent first pole pieces. The risk that burrs of the first pole piece pierce the diaphragm to cause short circuit of the battery cell can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production equipment, and more particularly to a pole piece compounding device and a battery cell winding device. BACKGROUND

[0002] In the battery production process, the pole piece compounding device is used to compound the pole piece and the separator into a compound material tape. However, in the prior art, whether the pole piece is cut off before the pole piece and the separator are compounded or the compound material tape is cut off after the battery cell is wound (at this time, the separator will be cut off together with the pole piece), the burr generated at the head or tail of the pole piece is easy to pierce the separator, thereby causing the risk of short circuit of the battery cell.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. SUMMARY

[0004] An object of the present application is to provide a new technical solution of a pole piece compounding device and a battery cell winding device.

[0005] To achieve the above object, according to a first aspect of the present application, a pole piece compounding device is provided, comprising:

[0006] a first pole piece unwinding assembly, a first separator unwinding assembly, a second separator unwinding assembly, and a compounding assembly;

[0007] The first pole piece unwinding assembly is configured to deliver the first pole piece to the compounding assembly, the first separator unwinding assembly is configured to deliver the first separator to the compounding assembly, the second separator unwinding assembly is configured to deliver the second separator to the compounding assembly, and the compounding assembly is configured to compound the first pole piece, the first separator, and the second separator to form a compound material tape.

[0008] In the delivery direction of the first pole piece, a clamping and cutting assembly and a taping assembly are arranged between the first pole piece unwinding assembly and the compounding assembly, the clamping and cutting assembly is configured to cut off the first pole piece and pull apart the adjacent two first pole pieces after cutting, and the taping assembly is configured to bond the adjacent two first pole pieces after cutting by a tape and maintain the gap between the adjacent two first pole pieces.

[0009] Optionally, the clamping and cutting assembly comprises a first clamping piece, a second clamping piece, and a first cutter, the first cutter is located between the first clamping piece and the second clamping piece; the first clamping piece and the second clamping piece are configured to clamp the first pole piece and pull apart the two adjacent first pole pieces after cutting, and the first cutter is configured to cut off the first pole piece.

[0010] Optionally, the composite assembly comprises a first composite assembly and a second composite assembly, the first composite assembly is configured to press the first pole piece, the first diaphragm and the second diaphragm to perform a first time of composite;

[0011] The second composite assembly is arranged downstream of the first composite assembly in the conveying direction of the first pole piece, and the second composite assembly is configured to press the first pole piece, the first diaphragm and the second diaphragm to perform a second time of composite to form a composite material belt.

[0012] Optionally, the first composite assembly and the second composite assembly are arranged in a vertical direction in the conveying direction of the first pole piece.

[0013] Optionally, the composite assembly comprises a first composite roller, a second composite roller, a first driving member, a second driving member, a third driving member, a support and a moving seat;

[0014] The first composite roller, the first driving member, the third driving member and the moving seat are arranged on the support, and the first driving member is configured to drive the first composite roller to rotate;

[0015] The second driving member and the second composite roller are arranged on the moving seat, and the second driving member is configured to drive the second composite roller to rotate;

[0016] The third driving member is configured to drive the moving seat to move relative to the support so as to make the second composite roller close to or away from the first composite roller.

[0017] Optionally, the moving seat comprises a first bearing seat, a second bearing seat and a connecting seat, the connecting seat connects the first bearing seat and the second bearing seat, and the first bearing seat and the second bearing seat are configured to support the second composite roller;

[0018] The pole piece composite device further comprises a connecting plate and a connecting rod, one end of the connecting rod is connected with the connecting seat, and the other end of the connecting rod is connected with the connecting plate through a support plate of the support;

[0019] The connecting plate is provided with a limiting member, and the limiting member is configured to limit the moving stroke of the moving seat.

[0020] Optionally, a cladding part is further arranged, and the cladding part clads the outer surface of the second composite roller.

[0021] Optionally, the first composite roller is provided with at least one of a first heating rod and a first thermocouple;

[0022] And / or, the second composite roller is provided with at least one of a second heating rod and a second thermocouple.

[0023] According to the second aspect of the present application, there is also provided an electrode core winding device comprising the electrode tab composite device according to any one of the preceding aspects.

[0024] Optionally, a turret is further included, the turret is provided with a winding needle, the turret can rotate to make the winding needle be in a winding station or a tail-end adhesive station;

[0025] In the first electrode tab conveying direction, a main driving assembly is arranged between the composite assembly and the winding station, the main driving assembly is used for driving the composite material belt to move towards the winding station.

[0026] Optionally, in the first electrode tab conveying direction, a composite material belt inserting assembly is arranged upstream of the winding station, the composite material belt inserting assembly is used for conveying the composite material belt to the winding needle.

[0027] Optionally, a second electrode tab inserting assembly and a second electrode tab cutter are further included, the second electrode tab inserting assembly is used for conveying a second electrode tab to the winding needle, the second electrode tab cutter is used for cutting off the second electrode tab; a composite material belt cutter is arranged between the winding station and the tail-end adhesive station, the composite material belt cutter is used for cutting off the first diaphragm, the second diaphragm and the adhesive tape at the gap between the winding station and the tail-end adhesive station.

[0028] The electrode tab composite device in the embodiment of the present application cuts off the first electrode tab through the clamping and cutting assembly, and makes the adjacent two first electrode tabs be pulled apart by a gap, and then the adjacent two first electrode tabs are bonded through the adhesive assembly, and the gap between the adjacent two first electrode tabs is kept, which effectively avoids the risk that the burrs generated at the head or tail of the first electrode tab pierce the diaphragm after the first electrode tab and the diaphragm are compounded, and cause the short circuit of the electrode core.

[0029] Other features of the present application, and their advantages, will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0031] Figure 1 is a structural schematic diagram of an electrode core winding device in an embodiment of the present application.

[0032] Figure 2 is a working principle diagram of an adhesive assembly in an embodiment of the present application.

[0033] Figure 3 is a structural schematic diagram of a first composite assembly in an embodiment of the present application.

[0034] Figure 4 is a structural schematic diagram of a first composite assembly in one embodiment of the present application.

[0035] Explanation of reference signs:

[0036] 1, first pole piece unwinding assembly; 2, first pole piece; 3, first diaphragm unwinding assembly; 4, first diaphragm; 5, second diaphragm unwinding assembly; 6, second diaphragm; 7, first composite assembly; 8, adhesive application assembly; 9, second composite assembly; 10, composite material belt; 11, clamping and cutting assembly; 1101, first clamping member; 1102, second clamping member; 1103, first cutter; 12, first buffer member; 13, second buffer member; 14, main drive assembly; 15, composite material belt buffer member; 16, composite material belt deviation rectifying member; 17, composite material belt inserting assembly; 18, second pole piece unwinding assembly; 19, second pole piece inserting assembly; 20, turret; 2001, winding needle; 2002, winding station; 2003, end adhesive application station; 21, composite material belt cutter; 22, second pole piece cutter; 23, mounting plate; 24, first composite roller; 25, second composite roller; 26, first drive member; 27, second drive member; 28, support; 2801, support plate; 29, moving seat; 2901, first bearing seat; 2902, second bearing seat; 30, third drive member; 31, connecting seat; 32, connecting plate; 33, connecting rod; 34, limiting member; 35, cladding portion; 36, first heating rod; 37, first thermocouple; 38, second heating rod; 39, second thermocouple; 41, wire rail; 42, mounting hole; 43, second pole piece; 44, adhesive tape; 45, gap. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, numerical expressions, and numerical values are not limiting to the scope of the present application unless specifically stated otherwise.

[0038] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0039] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the description if appropriate.

[0040] In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0042] In the following description, “connection” includes both direct connection between the two and indirect connection between the two through, for example, adapters, middleware, etc.

[0043] In the following description, "electrode" and "diaphragm" are used only to illustrate the working principle of the electrode composite device and should not be considered as part of the electrode composite device.

[0044] In the following description, each drive component can be driven by a variety of power sources such as cylinders and motors.

[0045] like Figures 1 to 4 As shown, the electrode composite device in this embodiment includes: a first electrode unwinding assembly 1, a first diaphragm unwinding assembly 3, a second diaphragm unwinding assembly 5, and a composite assembly; the first electrode unwinding assembly 1 is used to feed a first electrode 2 to the composite assembly, the first diaphragm unwinding assembly 3 is used to feed a first diaphragm 4 to the composite assembly, the second diaphragm unwinding assembly 5 is used to feed a second diaphragm 6 to the composite assembly, and the composite assembly is used to composite the first electrode 2, the first diaphragm 4, and the second diaphragm 6 to form a composite strip 10; in the conveying direction of the first electrode 2, a clamping and cutting assembly 11 and an adhesive applicator 8 are provided between the first electrode unwinding assembly 1 and the composite assembly, the clamping and cutting assembly 11 is used to cut the first electrode 2 and pull apart two adjacent first electrode 2 after cutting by a gap 45, and the adhesive applicator 8 is used to bond two adjacent first electrode 2 after cutting by adhesive tape 44 and maintain a gap 45 between the two adjacent first electrode 2.

[0046] Specifically, the electrode composite device described in this application embodiment can be mounted on a mounting plate 23. The mounting plate 23 can be a plate-shaped component or other suitable structure, and its main function is to support the various unwinding components, composite components, clamping and cutting components 11, and adhesive application components 8. The mounting plate 23 includes mounting holes 42, through which the composite components can be mounted on the mounting plate 23.

[0047] In the embodiment shown below, the first electrode unwinding assembly 1 is used to unwind the first electrode 2 to deliver the first electrode 2 to the first composite assembly 7. The first diaphragm unwinding assembly 3 is used to unwind the first diaphragm 4 to deliver the first diaphragm 4 to the first composite assembly 7. The second diaphragm unwinding assembly 5 is used to unwind the second diaphragm 6 to deliver the second diaphragm 6 to the first composite assembly 7.

[0048] In operation, the first pole piece unwinding assembly 1 feeds the first pole piece 2 to the clamping and cutting assembly 11, the clamping and cutting assembly 11 cuts the first pole piece 2 and pulls apart the two adjacent first pole pieces 2 by a gap 45, then the adhesive assembly 8 adheres the two adjacent first pole pieces 2 by the adhesive tape 44 and keeps the gap 45 between the two adjacent first pole pieces 2. Then the laminating assembly laminates the first separator 4 and the second separator 6 on both sides of the first pole piece 2, and at the gap 45, only the first separator 4, the second separator 6 and the adhesive tape 44 are laminated together. By separating the two adjacent first pole pieces 2 by the clamping and cutting assembly 11 and adhering the head or tail of the first pole piece 2 which is prone to burr by the adhesive assembly 8, the application effectively avoids the risk of the burr of the head or tail of the first pole piece 2 piercing the separator after the pole piece and the separator are laminated, causing the short circuit of the battery cell. At the same time, after the winding of the battery cell is completed, the laminated material belt can be cut at the gap 45, at this time, only the first separator 4, the second separator 6 and the adhesive tape 44 are cut, and the first pole piece 2 is not cut, so there is no risk of burr piercing the separator.

[0049] In addition, in the feeding direction of the first pole piece 2, the adhesive assembly 8 feeds the first pole piece 2 after adhering the adhesive tape 44 to the laminating assembly, the first separator unwinding assembly 3 feeds the first separator 4 to the laminating assembly, and the second separator unwinding assembly 5 feeds the second separator 6 to the laminating assembly, so that the laminating assembly can extrude the first pole piece 2, the first separator 4 and the second separator 6 to form a laminated material belt 10.

[0050] In addition, it should be noted that the head of the first pole piece 2 refers to the end close to the first pole piece unwinding assembly 1 in the feeding direction of the first pole piece 2, and the tail of the first pole piece 2 refers to the end away from the first pole piece unwinding assembly 1 in the feeding direction of the first pole piece 2.

[0051] In one embodiment, the clamping and cutting assembly 11 includes a first clamping piece 1101, a second clamping piece 1102 and a first cutter 1103, the first cutter 1103 is located between the first clamping piece 1101 and the second clamping piece 1102; the first clamping piece 1101 and the second clamping piece 1102 are used to clamp the first pole piece 2 and pull apart the two adjacent first pole pieces 2 by a gap 45, and the first cutter 1103 is used to cut the first pole piece 2.

[0052] Specifically, as shown in Figure 1 and Figure 2As shown, the clamping and cutting assembly 11 includes a first clamping member 1101, a second clamping member 1102, and a first cutter 1103. The first clamping member 1101 is arranged on the side of the clamping and cutting assembly 11 close to the first pole piece unwinding assembly 1. The second clamping member 1102 is arranged on the side of the clamping and cutting assembly 11 away from the first pole piece unwinding assembly 1. The first cutter 1103 is located between the first clamping member 1101 and the second clamping member 1102. The first clamping member 1101 includes a clamping drive member which can be a rotary motor, a cylinder multi-link mechanism, or the like to drive the first clamping member 1101 to move close to or away from the second clamping member 1102. Alternatively, the second clamping member 1102 includes a clamping drive member which can be a rotary motor, a cylinder multi-link mechanism, or the like to drive the second clamping member 1102 to move close to or away from the first clamping member 1101. Alternatively, both the first clamping member 1101 and the second clamping member 1102 include clamping drive members which can be rotary motors, cylinder multi-link mechanisms, or the like to drive the first clamping member 1101 and the second clamping member 1102 to move close to or away from each other.

[0053] In operation, the first cutter 1103 is used to cut the first pole piece 2. The first clamping member 1101 and the second clamping member 1102 are used to clamp two adjacent first pole pieces 2 and pull the two adjacent first pole pieces 2 apart by a gap 45. Then the adhesive assembly 8 uses the adhesive tape 44 to bond the two adjacent first pole pieces 2 and keep a gap 45 between the two adjacent first pole pieces 2. The pole piece compounding device described in the present application can effectively avoid the risk of the burrs at the head or tail of the first pole piece 2 piercing the separator after the pole piece and the separator are compounded, causing the battery cell to short circuit. Moreover, the burrs generated after the compounding material belt 10 is cut can also be avoided from piercing the separator.

[0054] In addition, a first buffer 12 is arranged between the first pole piece unwinding assembly 1 and the clamping and cutting assembly 11 in the conveying direction of the first pole piece 2. The first buffer 12 is used to buffer the first pole piece 2 to avoid the first pole piece 2 moving at too high a speed affecting the use of the clamping and cutting assembly 11.

[0055] In one embodiment, the compounding assembly includes a first compounding assembly 7 and a second compounding assembly 9. The first compounding assembly 7 is used to press the first pole piece 2, the first separator 4, and the second separator 6 to perform the first compounding. The second compounding assembly 9 is arranged downstream of the first compounding assembly 7 in the conveying direction of the first pole piece 2. The second compounding assembly 9 is used to press the first pole piece 2, the first separator 4, and the second separator 6 to perform the second compounding to finally form the compounding material belt 10.

[0056] Specifically, as shown in Figure 1 the first composite assembly 7 to extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 for the first time to form a composite material belt 10. Compared with the prior art, the first composite assembly 7 and the second composite assembly 9 are used to extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 twice to increase the heating time of the pole piece and the diaphragm by the composite assembly in the same time, so that the extrusion effect of the pole piece and the diaphragm by the composite assembly is better, thereby effectively improving the quality of the composite material belt 10, and making the formed composite material belt 10 better meet the demand of high-speed winding of the battery cell.

[0057] In addition, in the conveying direction of the first pole piece 2, the second buffer 13 is arranged between the adhesive assembly 8 and the first composite assembly 7. The second buffer 13 is used to buffer the first pole piece 2 after the adhesive tape 44 is pasted to avoid the influence of the first pole piece 2 with too high speed on the composite effect of the first composite assembly 7 and the second composite assembly 9.

[0058] In one embodiment, in the conveying direction of the first pole piece 2, the first composite assembly 7 and the second composite assembly 9 are arranged in the vertical direction.

[0059] Specifically, as shown in Figure 1 the first composite assembly 7 and the second composite assembly 9 can be installed on the mounting plate 23 through the mounting hole 42, the mounting plate 23 is installed on the reference surface (ground, table top, workbench surface, etc.), and the reference surface extends in the horizontal direction.

[0060] In the conveying direction of the first pole piece 2, the first composite assembly 7 and the second composite assembly 9 are arranged in a vertical direction, i.e. the second composite assembly 9 is arranged downstream of the first composite assembly 7 in a vertical direction perpendicular to the horizontal direction, so that the first pole piece 2 can always be in a vertical state when the first and second compositing are performed, effectively avoiding the problem that the first pole piece 2 is in a horizontal state when compositing and thus causes the first pole piece 2 to sag under the action of gravity. In other words, in the embodiment of the present application, the second composite assembly 9 is arranged downstream of the first composite assembly 7 in a vertical direction perpendicular to the horizontal direction, so that the natural sagging direction of the first pole piece 2 is also the direction in which the composite material belt 10 is further conveyed towards the second composite assembly 9.

[0061] In addition, it should be noted that the first composite assembly 7 and the second composite assembly 9 are arranged in a vertical direction, which allows a certain angle between them and the vertical direction, for example, the angle is 3°, 5° and 7°, etc. Such an angle is generally allowed by the installation tolerance and is also considered as the first composite assembly 7 and the second composite assembly 9 being arranged in a vertical direction.

[0062] In one embodiment, the composite assembly comprises a first composite roller 24, a second composite roller 25, a first driving member 26, a second driving member 27, a third driving member 30, a support 28 and a moving seat 29; the first composite roller 24, the first driving member 26, the third driving member 30 and the moving seat 29 are arranged on the support 28, and the first driving member 26 can drive the first composite roller 24 to rotate; the second driving member 27 and the second composite roller 25 are arranged on the moving seat 29, and the second driving member 27 can drive the second composite roller 25 to rotate; and the third driving member 30 can drive the moving seat 29 to move relative to the support 28 so as to make the second composite roller 25 approach or move away from the first composite roller 24.

[0063] Specifically, as Figure 3 and Figure 4As shown, the first composite assembly 7 in the embodiment of the present application is taken as an example for illustration, which comprises a first composite roller 24, a second composite roller 25, a first driving member 26, a second driving member 27, a third driving member 30, a support 28 and a moving seat 29. The first composite roller 24 and the second composite roller 25 are used to extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 to perform one-time composite. The first driving member 26 can drive the first composite roller 24 to rotate around its own axis by using a rotary motor, a cylinder multi-link mechanism or the like. The second driving member 27 can drive the second composite roller 25 to rotate around its own axis by using a rotary motor, a cylinder multi-link mechanism or the like. The third driving member 30 can drive the moving seat 29 to move relative to the support 28 by using a rotary motor, a cylinder multi-link mechanism or the like so as to make the second composite roller 25 close to or away from the first composite roller 24.

[0064] In operation, the third driving member 30 first drives the moving seat 29 to move relative to the support 28 so as to make the second composite roller 25 away from the first composite roller 24; then, the first pole piece unwinding assembly 1 sends the first pole piece 2 to the first composite assembly 7, the first diaphragm unwinding assembly 3 sends the first diaphragm 4 to the first composite assembly 7, and the second diaphragm unwinding assembly 5 sends the second diaphragm 6 to the first composite assembly 7; after the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 reach between the first composite roller 24 and the second composite roller 25, the third driving member 30 drives the moving seat 29 to move relative to the support 28 so as to make the second composite roller 25 close to the first composite roller 24, so as to realize that the first composite roller 24 and the second composite roller 25 extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 to perform one-time composite. Compared with the composite assembly in the prior art, the pole piece composite device in the present application effectively improves the composite effect of the pole piece and the diaphragm by the above-mentioned arrangement, and further guarantees the quality of the composite material belt 10 formed.

[0065] In addition, the structure of the second composite assembly 9 in the embodiment of the present application is the same as that of the first composite assembly 7, and the present application will not be described again.

[0066] In addition, the support 28 in the embodiment of the present application can be installed on the mounting plate 23 through the mounting hole 42. The first composite roller 24, the first driving member 26 and the third driving member 30 can be arranged on the support 28 in a screwing, riveting, bonding or welding manner. The second driving member 27 and the second composite roller 25 can be arranged on the moving seat 29 in a screwing, riveting, bonding or welding manner.

[0067] The moving seat 29 can be in sliding fit with a wire rail 41 arranged on the support 28, so that the third driving member 30 can drive the moving seat 29 to move relative to the support 28.

[0068] Of course, the moving seat 29 can also be arranged on the support 28 in other movable manners, which can be selected according to actual needs by those skilled in the art, and the present application does not make specific limitation here.

[0069] In an embodiment, the moving seat 29 comprises a first bearing seat 2901, a second bearing seat 2902, and a connecting seat 31 connecting the first bearing seat 2901 and the second bearing seat 2902, the first bearing seat 2901 and the second bearing seat 2902 being used for supporting the second composite roller 25; the pole piece composite device further comprises a connecting plate 32 and a connecting rod 33, one end of the connecting rod 33 being connected with the connecting seat 31, and the other end of the connecting rod 33 being connected with the connecting plate 32 through a support plate 2801 of the support 28; the connecting plate 32 is provided with a limiting piece 34 capable of limiting the moving stroke of the moving seat 29.

[0070] Specifically, as shown in Figure 3 and Figure 4 The moving seat 29 comprises a first bearing seat 2901 and a second bearing seat 2902, which are arranged at two ends of the second composite roller 25 to support the second composite roller 25. The moving seat 29 further comprises a connecting seat 31 for connecting the first bearing seat 2901 and the second bearing seat 2902, and the connecting seat 31 is arranged on a side of the second composite roller 25 away from the first composite roller 24. The support 28 comprises a support plate 2801, and a plurality of support plates 2801 are provided and form a containing cavity with an opening, and the first composite roller 24, the second composite roller 25, and the moving seat 29 are installed in the containing cavity.

[0071] The pole piece composite device further comprises a connecting plate 32 and a connecting rod 33, one end of the connecting rod 33 being connected with the connecting seat 31 installed in the containing cavity, and the other end of the connecting rod 33 being connected with the connecting plate 32 located outside the containing cavity through the support plate 2801 of the support 28. The connecting plate 32 is provided with a limiting piece 34 capable of limiting the moving stroke of the moving seat 29.

[0072] In operation, the third driving member 30 drives the moving seat 29 to move relative to the support 28 to make the second composite roller 25 approach or move away from the first composite roller 24, and when the distance between the first composite roller 24 and the second composite roller 25 reaches a preset value, the limiting member 34 is in abutment against the support 28 to prevent the moving seat 29 from further moving. The limiting member 34 controls the moving stroke of the moving seat 29, effectively ensures the composite space between the first composite roller 24 and the second composite roller 25 for extruding the first pole piece 2, the first diaphragm 4 and the second diaphragm 6, further improves the composite effect of the pole piece composite device on the pole piece and the diaphragm, and improves the quality of the formed composite material belt 10.

[0073] In addition, the moving seat 29 and the support 28 have a linear rail 41 therebetween, so that the third driving member 30 can drive the moving seat 29 to move relative to the support 28.

[0074] In one embodiment, the pole piece composite device further comprises a cladding part 35 cladded to the outer surface of the second composite roller 25.

[0075] Specifically, as shown in Figure 4 The cladding part 35 is arranged on the outer surface of the second composite roller 25, effectively improving the composite effect of the pole piece composite device on the pole piece and the diaphragm, and further improving the quality of the formed composite material belt 10.

[0076] The cladding part 35 can be made of at least one of rubber, silicone and polyurethane, which can be selected by those skilled in the art according to actual needs, and the present application does not make specific limitation here.

[0077] In one embodiment, the first composite roller 24 is provided with at least one of a first heating rod 36 and a first thermocouple 37; and / or, the second composite roller 25 is provided with at least one of a second heating rod 38 and a second thermocouple 39.

[0078] Specifically, as shown in Figure 4 The heating rod and the thermocouple are arranged on the first composite roller 24 and / or the second composite roller 25, effectively improving the extrusion effect of the pole piece composite device on the pole piece and the diaphragm.

[0079] According to a second aspect of the present application, there is provided an electrode core winding device comprising the pole piece composite device according to any one of the preceding embodiments.

[0080] Specifically, as shown in Figure 1As shown, the battery cell winding device provided by the embodiment of the present application is provided with the pole piece composite device, so that the first composite assembly 7 can extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 to perform the first time of compounding, and the second composite assembly 9 can extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 again to perform the second time of compounding to form the composite material belt 10. Compared with the prior art which is provided with a single composite assembly to extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 to perform single compounding to form the composite material belt 10, the present application can increase the heating time of the composite assembly to the pole piece and the diaphragm within the same time through the two times of compounding of the first composite assembly 7 and the second composite assembly 9, so that the extrusion effect of the composite assembly to the pole piece and the diaphragm is better, thereby effectively improving the quality of the composite material belt 10, and making the formed composite material belt 10 better meet the demand of high-speed winding of the battery cell.

[0081] In one embodiment, the battery cell winding device further comprises a turret 20 provided with a winding needle 2001, the turret 20 can rotate to make the winding needle 2001 be in a winding station 2002 or an end-taping station 2003; a main drive assembly 14 is arranged between the second composite assembly 9 and the winding station 2002 in the conveying direction of the first pole piece 2, and the main drive assembly 14 is used to drive the composite material belt 10 to move towards the winding station 2002.

[0082] Specifically, as shown, Figure 1 As shown, the turret 20 of the embodiment of the present application comprises a winding station 2002 and an end-taping station 2003, the winding station 2002 and the end-taping station 2003 are both provided with a winding needle 2001, and the winding needle 2001 has an extended state of extending out of the turret 20 and a retracted state of retracting into the turret 20. The turret 20 is provided with a seventh drive member and an eighth drive member, the seventh drive member can drive the turret 20 to rotate around its own axis by using a rotary motor, a multi-link mechanism of a pneumatic cylinder and the like, so as to drive the winding needle 2001 located at the winding station 2002 to flip to the end-taping station 2003, or to drive the winding needle 2001 located at the end-taping station 2003 to flip to a feeding station or the winding station 2002. The eighth drive member can drive the winding needle 2001 to rotate around its own axis by using a rotary motor, a linear motor, a pneumatic cylinder and the like, so as to wind the composite material belt 10 and the second pole piece 43 on the outer surface of the battery cell. The turret 20 is further provided with a ninth drive member, the ninth drive member can drive the winding needle 2001 to extend out of the turret 20 or retract into the turret 20 by using a rotary motor, a linear motor, a pneumatic cylinder and the like.

[0083] Wherein, for the sake of clarity, the rotation of the turret 20 around its own axis is referred to as "revolution", and the rotation of the winding needle 2001 around its own axis is referred to as "rotation".

[0084] In the conveying direction of the first tab 2, a main driving assembly 14 is arranged between the second composite assembly 9 and the winding station 2002, which is used to drive the composite material tape 10 to move towards the winding station 2002, so as to effectively ensure the winding efficiency of the battery cell.

[0085] In addition, in the conveying direction of the first tab 2, a composite material tape buffer 15 and a composite material tape deviation rectifying device 16 are arranged between the main driving assembly 14 and the winding station 2002. The composite material tape buffer 15 is used to buffer the composite material tape 10, so as to avoid the influence of the composite material tape 10 with too high speed on the winding effect of the winding station 2002. The composite material tape deviation rectifying device 16 is used to rectify the deviation of the composite material tape 10, so as to ensure the winding effect of the winding station 2002 on the composite material tape, and prevent the battery cell formed by the composite material tape 10 with deviation from meeting the quality requirement of the battery cell winding.

[0086] In an embodiment, in the conveying direction of the first tab 2, a composite material tape tab assembly 17 is arranged upstream of the winding station 2002, which is used to convey the composite material tape 10 to the winding needle 2001.

[0087] Specifically, as shown in Figure 1 The battery cell winding device further comprises a composite material tape tab assembly 17, which is arranged upstream of the winding station 2002. The composite material tape tab assembly 17 comprises a composite material tape tab roller, which is used to convey the composite material tape 10 to the winding needle 2001 of the winding station 2002 at the beginning of the winding of the first battery cell, so as to effectively ensure the tab effect of the composite material tape 10.

[0088] In an embodiment, the battery cell winding device further comprises a second tab tab assembly 19 and a second tab cutter 22. The second tab tab assembly 19 is used to convey the second tab 43 to the winding needle 2001, and the second tab cutter 22 is used to cut the second tab 43. A composite material tape cutter 21 is arranged between the winding station 2002 and the end gluing station 2003, which is used to cut the first diaphragm 4, the second diaphragm 6 and the adhesive tape 44 at the gap 45 between the winding station 2002 and the end gluing station 2003.

[0089] Specifically, as shown in Figure 1As shown, the battery cell winding device also comprises a second tab unwinding assembly 18, a second tab inserting assembly 19, a second tab cutter 22 and a composite tape cutter 21, which are all capable of being installed on the mounting plate 23 through the mounting holes 42. The second tab unwinding assembly 18 is used to unwind the second tab 43 to feed the second tab 43 to the second tab inserting assembly 19. The second tab inserting assembly 19 comprises a second tab inserting roller, which is used to feed the second tab 43 to the winding needle 2001 of the winding station 2002. The second tab cutter 22 is used to cut the second tab 43. The composite tape cutter 21 is arranged between the winding station 2002 and the end-taping station 2003, and is used to cut the first separator 4, the second separator 6 and the adhesive tape 44 at the gap 45 between the winding station 2002 and the end-taping station 2003. At this time, since the first tab 2 is not cut, burrs will not be generated, and there will be no risk of piercing the separator.

[0090] In operation, the composite tape inserting assembly 17 feeds the composite tape 10 to the winding needle 2001, the second tab inserting assembly 19 feeds the second tab 43 to the winding needle 2001, and the winding needle 2001 on the winding station 2002 extends from the turret 20 under the driving of the ninth driving member, and rotates under the driving of the eighth driving member to wind the composite tape 10 and the second tab 43 on the outer surface of the battery cell at the same time. Then the turret 20 is driven to revolve by the seventh driving member to drive the winding needle 2001 on the winding station 2002 to the end-taping station 2003, and the first separator 4, the second separator 6 and the adhesive tape 44 at the gap 45 are cut by the composite tape cutter 21. Compared with the battery cell winding device in the prior art, the tab composite device effectively improves the winding efficiency of the battery cell through the above arrangement.

[0091] In the above embodiments, the differences between the embodiments are mainly described, and the optimization features different between the embodiments can be combined to form a better embodiment as long as they are not contradictory. In view of the brevity of the writing, the details are not described here.

[0092] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, but not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A pole piece compounding apparatus characterized by, The application relates to a composite material belt production device. The first pole piece unwinding assembly (1) is used for conveying the first pole piece (2) to the composite assembly, the first diaphragm unwinding assembly (3) is used for conveying the first diaphragm (4) to the composite assembly, the second diaphragm unwinding assembly (5) is used for conveying the second diaphragm (6) to the composite assembly, and the composite assembly is used for compositing the first pole piece (2), the first diaphragm (4) and the second diaphragm (6) to form a composite material belt (10). In the conveying direction of the first pole piece (2), a clamping and cutting assembly (11) and a tape sticking assembly (8) are arranged between the first pole piece unwinding assembly (1) and the composite assembly, the clamping and cutting assembly (11) is used for cutting the first pole piece (2) and pulling apart the adjacent two first pole pieces (2) by a gap (45), and the tape sticking assembly (8) is used for sticking the adjacent two first pole pieces (2) by a tape (44) and keeping the gap (45) between the adjacent two first pole pieces (2). The clamping and cutting assembly (11) comprises a first clamping piece (1101), a second clamping piece (1102) and a first cutter (1103), the first cutter (1103) is located between the first clamping piece (1101) and the second clamping piece (1102), the first clamping piece (1101) and the second clamping piece (1102) are used for clamping the first pole piece (2) and pulling apart the two adjacent first pole pieces (2) by a gap (45), and the first cutter (1103) is used for cutting the first pole piece (2).

2. The pole piece composite device of claim 1, wherein, The composite assembly comprises a first composite assembly (7) and a second composite assembly (9), the first composite assembly (7) is used for extruding the first pole piece (2), the first diaphragm (4) and the second diaphragm (6) to perform first compositing.

3. The pole piece composite of claim 1, wherein, In the conveying direction of the first pole piece (2), the second composite assembly (9) is arranged downstream of the first composite assembly (7), and the second composite assembly (9) is used for extruding the first pole piece (2), the first diaphragm (4) and the second diaphragm (6) to perform second compositing and form the composite material belt (10). In the conveying direction of the first pole piece (2), the first composite assembly (7) and the second composite assembly (9) are arranged in the vertical direction.

4. The pole piece composite of claim 3, wherein, The composite assembly comprises a first composite roller (24), a second composite roller (25), a first driving piece (26), a second driving piece (27), a third driving piece (30), a support (28) and a moving base (29).

5. The pole piece composite of claim 1, wherein, The first composite roller (24), the first driving piece (26), the third driving piece (30) and the moving base (29) are arranged on the support (28), and the first driving piece (26) can drive the first composite roller (24) to rotate. The second driving piece (27) and the second composite roller (25) are arranged on the moving base (29), and the second driving piece (27) can drive the second composite roller (25) to rotate. ​ The third driving member (30) can drive the moving seat (29) to move relative to the support (28) to make the second composite roller (25) close to or away from the first composite roller (24).

6. The pole piece composite of claim 5, wherein, The moving seat (29) comprises a first bearing seat (2901), a second bearing seat (2902) and a connecting seat (31), the connecting seat (31) connects the first bearing seat (2901) and the second bearing seat (2902), and the first bearing seat (2901) and the second bearing seat (2902) are used for supporting the second composite roller (25); The pole piece compounding device further comprises a connecting plate (32) and a connecting rod (33), one end of the connecting rod (33) is connected with the connecting seat (31), and the other end of the connecting rod (33) is connected with the connecting plate (32) through the support plate (2801) of the support (28); The connecting plate (32) is provided with a limiting piece (34), and the limiting piece (34) can limit the moving stroke of the moving seat (29).

7. The pole piece composite of claim 5, wherein, Further comprising a cladding part (35) cladded on the outer surface of the second composite roller (25).

8. The pole piece composite of claim 5, wherein, The first composite roller (24) is provided with at least one of a first heating rod (36) and a first thermocouple (37); And / or, the second composite roller (25) is provided with at least one of a second heating rod (38) and a second thermocouple (39).

9. An electrode core winding apparatus characterized by comprising: The pole piece compounding device comprises the pole piece compounding device according to any one of claims 1-8.

10. The cell winding apparatus according to claim 9, characterized by, Further comprising a turret (20) provided with a winding needle (2001), the turret (20) can rotate to make the winding needle (2001) be in a winding station (2002) or an end-taped station (2003); In the conveying direction of the first pole piece (2), a main driving assembly (14) is arranged between the compounding assembly and the winding station (2002), and the main driving assembly (14) is used for driving the compounding material belt (10) to move towards the winding station (2002).

11. The cell winding apparatus according to claim 10, characterized by, In the conveying direction of the first pole piece (2), a compounding material belt inserting assembly (17) is arranged upstream of the winding station (2002), and the compounding material belt inserting assembly (17) is used for conveying the compounding material belt (10) to the winding needle (2001).

12. The cell winding apparatus according to claim 10, characterized by, Further comprising a second pole piece inserting assembly (19) and a second pole piece cutter (22), the second pole piece inserting assembly (19) is used for conveying the second pole piece (43) to the winding needle (2001), and the second pole piece cutter (22) is used for cutting off the second pole piece (43); a compounding material belt cutter (21) is arranged between the winding station (2002) and the end-taped station (2003), and the compounding material belt cutter (21) is used for cutting off the first diaphragm (4), the second diaphragm (6) and the adhesive tape (44) at the gap (45) between the winding station (2002) and the end-taped station (2003).

Images