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, a first compounding assembly and a second compounding assembly, the first pole piece unwinding assembly is used for conveying a first pole piece to the first composite assembly, the first diaphragm unwinding assembly is used for conveying a first diaphragm to the first composite assembly, and the second diaphragm unwinding assembly is used for conveying a second diaphragm to the first composite assembly; the first composite assembly is used for extruding the first pole piece, the first diaphragm and the second diaphragm to perform first composite; in the conveying direction of the first pole piece, the second composite assembly is arranged at the downstream of the first composite assembly, and the second composite assembly is used for extruding the first pole piece, the first diaphragm and the second diaphragm so as to carry out second-time composite to form a second composite material belt. The requirement for high-speed winding of the battery cell can be met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery production equipment, in particular to an electrode piece compounding device and a battery cell winding device. BACKGROUND

[0002] In a battery production process, an electrode piece compounding device is used to compound electrode pieces and separators into a compound material tape. However, in the prior art, only a single compounding assembly is used to compound the electrode pieces and the separators, which results in poor quality of the compound material tape compounded, and cannot meet the needs of high-speed winding of battery cells.

[0003] Therefore, there is a need to provide a new technical solution to solve the above technical problems. UTILITY MODEL CONTENT

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

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

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

[0007] The first electrode piece unwinding assembly is configured to deliver first electrode pieces to the first compounding assembly, the first separator unwinding assembly is configured to deliver first separators to the first compounding assembly, the second separator unwinding assembly is configured to deliver second separators to the first compounding assembly, and the first compounding assembly is configured to extrude the first electrode pieces, the first separators and the second separators to perform first compounding.

[0008] In the delivery direction of the first electrode pieces, the second compounding assembly is arranged downstream of the first compounding assembly, and the second compounding assembly is configured to extrude the first electrode pieces, the first separators and the second separators to perform second compounding to form a second compound material tape.

[0009] Optionally, in the delivery direction of the first electrode pieces, an electrode piece cutting and inserting assembly is arranged between the first electrode piece unwinding assembly and the first compounding assembly, and the electrode piece cutting and inserting assembly is configured to cut the first electrode pieces and deliver the cut first electrode pieces to the first compounding assembly.

[0010] Optionally, in the delivery direction of the first electrode pieces, the first compounding assembly and the second compounding assembly are arranged in a vertical direction.

[0011] Optionally, the first compounding assembly and / or the second compounding assembly comprises a first compounding roller, a second compounding roller, a first driving member, a second driving member, a third driving member, a support and a moving seat.

[0012] 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 capable of driving the first composite roller to rotate;

[0013] The second driving member and the second composite roller are arranged on the moving seat, and the second driving member is capable of driving the second composite roller to rotate;

[0014] The third driving member is capable of driving 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.

[0015] Optionally, the moving seat comprises a first bearing seat, a second bearing seat and a connecting seat, the connecting seat connecting the first bearing seat and the second bearing seat, and the first bearing seat and the second bearing seat being used for supporting the second composite roller;

[0016] The pole piece compounding device further comprises a connecting plate and a connecting rod, one end of the connecting rod being connected with the connecting seat, and the other end of the connecting rod being connected with the connecting plate through a support plate of the support;

[0017] The connecting plate is provided with a limiting member, and the limiting member is capable of limiting the moving stroke of the moving seat.

[0018] Optionally, a cladding part is further included, and the cladding part clads the outer surface of the second composite roller.

[0019] Optionally, the first composite assembly is provided with at least one of a first heating rod and a first thermocouple;

[0020] and / or, the second composite assembly is provided with at least one of a second heating rod and a second thermocouple.

[0021] According to the second aspect of the present application, an electrode core winding device is further provided, comprising the pole piece compounding device according to any one of the preceding aspects.

[0022] Optionally, a turret is further included, and the turret is provided with a winding needle, and the turret is capable of rotating to make the winding needle be in a winding station or a tail-end adhesive station;

[0023] In the first pole piece conveying direction, a main driving assembly is arranged between the second composite assembly and the winding station, and the main driving assembly is used for driving the second composite material belt to move towards the winding station.

[0024] Optionally, in the first pole piece conveying direction, a composite material belt inserting piece assembly is arranged upstream of the winding station, and the composite material belt inserting piece assembly is used for conveying the second composite material belt to the winding needle.

[0025] Optionally, a second pole piece insert assembly for conveying a second pole piece to the winding needle and a second pole piece cutter for cutting off the second pole piece are further included. A cutter assembly is arranged between the winding station and the end-taping station, and is used to cut off the first and second separators between the winding station and the end-taping station.

[0026] The pole piece composite device in the embodiment of the present application forms a composite material belt through twice compounding of the first and second composite assemblies, increases the heating time of the pole piece and the separator by the pole piece composite device, improves the quality of the composite material belt, and thus makes the composite material belt better meet the demand of high-speed winding of the battery cell.

[0027] Other features and advantages of the present application will become apparent from the following detailed description of illustrative embodiments thereof, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0029] Figure 1 is a structural schematic diagram of a battery cell winding equipment in an embodiment of the present application.

[0030] Figure 2 is a structural schematic diagram of a first composite assembly in an embodiment of the present application.

[0031] Figure 3 is a structural schematic diagram of a first composite assembly in an embodiment of the present application.

[0032] Legend of reference signs:

[0033] 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, first composite material belt; 9, second composite assembly; 10, second composite material belt; 11, pole piece cutting and inserting assembly; 1101, first pole piece conveying roller; 1102, first pole piece cutter; 12, first pole piece buffer; 13, first pole piece deviation rectifying device; 14, main drive assembly; 15, composite material belt buffer; 16, composite material belt deviation rectifying device; 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 sealing and adhesive applying station; 21, cutter assembly; 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. DETAILED DESCRIPTION

[0034] 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 arrangements, numerical expressions, and values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0035] 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.

[0036] 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.

[0037] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0038] It should be noted that like numbers and letters refer to like items throughout the drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0039] In the following description, "connected" can include both direct connection and indirect connection through, for example, intervening parts, intermediate devices, etc.

[0040] 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.

[0041] In the following description, each drive component can be driven by a variety of power sources such as cylinders and motors.

[0042] like Figures 1 to 3 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, a first composite assembly 7, and a second composite assembly 9; the first electrode unwinding assembly 1 is used to feed a first electrode 2 to the first composite assembly 7, the first diaphragm unwinding assembly 3 is used to feed a first diaphragm 4 to the first composite assembly 7, the second diaphragm unwinding assembly 5 is used to feed a second diaphragm 6 to the first composite assembly 7, and the first composite assembly 7 is used to compress the first electrode 2, the first diaphragm 4, and the second diaphragm 6 for a first composite; in the conveying direction of the first electrode 2, the second composite assembly 9 is disposed downstream of the first composite assembly 7, and the second composite assembly 9 is used to compress the first electrode 2, the first diaphragm 4, and the second diaphragm 6 for a second composite to form a second composite strip 10.

[0043] 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 and composite components. The mounting plate 23 includes mounting holes 42, through which the first composite component 7 and the second composite component 9 can be mounted on the mounting plate 23.

[0044] 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.

[0045] In operation, the first pole piece unwinding assembly 1 feeds the first pole piece 2 to the first composite assembly 7, the first diaphragm unwinding assembly 3 feeds the first diaphragm 4 to the first composite assembly 7, and the second diaphragm unwinding assembly 5 feeds the second diaphragm 6 to the first composite assembly 7, so that the first composite assembly 7 can extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 for the first time to perform the first composite, and the first diaphragm 4 and the second diaphragm 6 are attached on both sides of the first pole piece 2 to form the first composite material belt 8 after the first composite. In the conveying direction of the first pole piece 2 (at this time, it is also the conveying direction of the first composite material belt 8), the second composite assembly 9 is arranged downstream of the first composite assembly 7, 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 composite, so that the attachment of the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 is more reliable. In order to distinguish, the material belt after the second composite is marked as the second composite material belt 10. Compared with the prior art in which only a single composite assembly is arranged to extrude the first pole piece 2, the first diaphragm 4 and the second diaphragm 6 to perform single composite to form the first composite material belt 8, 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 twice composite of the first composite assembly 7 and the second composite assembly 9, so that the extrusion and attachment effect of the composite assembly to the pole piece and the diaphragm is better, thereby effectively improving the quality of the second composite material belt 10, and making the formed second composite material belt 10 better meet the demand of high-speed winding of the battery cell.

[0046] In one embodiment, in the conveying direction of the first pole piece 2, a pole piece cutting and inserting assembly 11 is arranged between the first pole piece unwinding assembly 1 and the first composite assembly 7, and the pole piece cutting and inserting assembly 11 is used to cut the first pole piece 2 and feed the cut first pole piece 2 to the first composite assembly 7.

[0047] Specifically, as shown in Figure 1 The pole piece cutting and inserting assembly 11 includes a first pole piece conveying roller 1101 and a first pole piece cutter 1102, the first pole piece cutter 1102 is used to cut the first pole piece 2, and the first pole piece conveying roller 1101 is used to feed the cut first pole piece 2 to the first composite assembly 7, so as to facilitate 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, and then perform the second composite. Compared with the prior art in which the first pole piece cutter 1102 is arranged upstream of the winding station, the present application can cut the first pole piece 2 before it enters the first composite, ensuring the continuity of the second composite material belt 10 during the winding process of the battery cell, without the need to arrange a cutter at the inserting mechanism upstream of the winding station.

[0048] In addition, a first pole piece buffer 12 and a first pole piece deviation rectifier 13 are arranged between the first pole piece unwinding assembly 1 and the pole piece cutting and inserting assembly 11 in the conveying direction of the first pole piece 2. The first pole piece buffer 12 is used to buffer the first pole piece 2 to avoid the influence of the first composite assembly 7 and the second composite assembly 9 caused by the too fast first pole piece 2. The first pole piece deviation rectifier 13 is used to rectify the deviation of the first pole piece 2 to ensure the extrusion effect of the first composite assembly 7 on the first pole piece 2, the first diaphragm 4 and the second diaphragm 6, and prevent the deviated first pole piece 2 from causing the formed second composite material belt 10 to fail to meet the production requirements of the battery cell.

[0049] In one embodiment, the first composite assembly 7 and the second composite assembly 9 are arranged in a vertical direction in the conveying direction of the first pole piece 2.

[0050] 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, and the mounting plate 23 is installed on the reference surface (ground, table top, workbench surface, etc.), which extends in the horizontal direction.

[0051] 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, that is, 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 during the first and second compounding, effectively avoiding the problem that the first pole piece 2 is in a horizontal state during compounding and 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 first composite material belt 8 is further conveyed to the second composite assembly 9.

[0052] In addition, it should be noted that the first composite assembly 7 and the second composite assembly 9 arranged in a vertical direction allow an included angle between them and the vertical direction, for example, the included angle is 3°, 5° and 7°, etc. Such an included angle is generally allowed by the installation tolerance, and is also regarded as the first composite assembly 7 and the second composite assembly 9 arranged in a vertical direction.

[0053] In one embodiment, the first composite assembly 7 and / or the second composite assembly 9 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, the first driving member 26 is capable of driving 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, the second driving member 27 is capable of driving the second composite roller 25 to rotate; the third driving member 30 is capable of driving 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.

[0054] Specifically, as shown in Figure 2 and Figure 3 the first composite assembly 7 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 the first composite. The first driving member 26 is capable of driving 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 is capable of driving 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 is capable of driving 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 by using a rotary motor, a cylinder multi-link mechanism or the like.

[0055] 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 move 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 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 approach 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 the first 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 arrangement, and further guarantees the quality of the second composite material belt 10 formed.

[0056] In addition, the second composite assembly 9 can have the same structure as the first composite assembly 7, and thus the description of the first composite assembly 7 is not repeated here.

[0057] In addition, the support 28 can be mounted 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 threaded, riveted, bonded, or welded manner. The second driving member 27 and the second composite roller 25 can be arranged on the moving seat 29 in a threaded, riveted, bonded, or welded manner.

[0058] The moving seat 29 can be in sliding fit with the linear rail 41, and the linear rail 41 is 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.

[0059] Of course, the moving seat 29 can also be arranged on the support 28 in other movable manners, and those skilled in the art can select according to actual needs, and the application does not make specific limitations here.

[0060] In one embodiment, the moving seat 29 includes 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, and the first bearing seat 2901 and the second bearing seat 2902 are used to support the second composite roller 25; the pole piece compounding device further includes 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.

[0061] Specifically, as shown in FIG. 4, the connecting rod 33 is connected with the connecting seat 31 through a first connecting hole 3101, and the other end of the connecting rod 33 is connected with the connecting plate 32 through a second connecting hole 3201. Figure 2 and Figure 3As shown, the movable seat 29 of this embodiment includes a first bearing seat 2901 and a second bearing seat 2902, which are disposed at both ends of the second composite roller 25 to support the second composite roller 25. The movable seat 29 also includes a connecting seat 31, which is used to connect the first bearing seat 2901 and the second bearing seat 2902, and is disposed on the side of the second composite roller 25 away from the first composite roller 24. The support 28 includes a support plate 2801, and multiple support plates 2801 are provided to form an open receiving cavity, in which the first composite roller 24, the second composite roller 25 and the movable seat 29 are installed.

[0062] The electrode composite device further includes a connecting plate 32 and a connecting rod 33. One end of the connecting rod 33 is connected to a connecting seat 31 installed in the receiving cavity, and the other end of the connecting rod 33 passes through the support plate 2801 of the support 28 and is connected to the connecting plate 32 located outside the receiving cavity. The connecting plate 32 is provided with a limiting member 34, which can limit the movement stroke of the movable seat 29.

[0063] During operation, the third driving member 30 drives the movable seat 29 to move relative to the support 28, causing the second composite roller 25 to move closer to or further away from the first composite roller 24. When the distance between the first composite roller 24 and the second composite roller 25 reaches a preset value, the limiting member 34 presses against the support 28 to prevent the movable seat 29 from moving further. By controlling the travel of the movable seat 29, the limiting member 34 effectively ensures the composite space between the first composite roller 24 and the second composite roller 25 for extruding the first electrode 2, the first diaphragm 4, and the second diaphragm 6, further improving the composite effect of the electrode composite device on the electrode and the diaphragm, and improving the quality of the formed second composite strip 10.

[0064] Furthermore, in this embodiment of the application, the movable seat 29 and the support 28 are provided with a linear rail 41 so that the third driving member 30 can drive the movable seat 29 to move relative to the support 28.

[0065] In one embodiment, the electrode composite device further includes a covering portion 35, which covers the outer surface of the second composite roller 25.

[0066] Specifically, such as Figure 3 As shown, by providing the covering portion 35 on the outer surface of the second composite roller 25, this application effectively improves the composite effect of the electrode composite device on the electrode and the diaphragm, and further improves the quality of the formed second composite strip 10.

[0067] The material of the covering part 35 can be 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 limitations here.

[0068] In one embodiment, the first composite assembly 7 is provided with at least one of a first heating rod 36 and a first thermocouple 37; and / or, the second composite assembly 9 is provided with at least one of a second heating rod 38 and a second thermocouple 39.

[0069] Specifically, as shown in Figure 3 The present application effectively improves the extrusion effect of the pole piece composite device on the pole piece and the separator by providing at least one of a heating rod and a thermocouple on the first composite assembly 7 and / or the second composite assembly 9.

[0070] According to a second aspect of the present application, an electrode core winding device is provided, comprising the pole piece composite device according to any one of the preceding aspects.

[0071] Specifically, as shown in Figure 1 The electrode core winding device according to the embodiments of the present application can increase the heating time of the composite assembly on the pole piece and the separator in the same time by twice extrusion of the first composite assembly 7 and the second composite assembly 9, so that the extrusion effect of the composite assembly on the pole piece and the separator is better, thereby effectively improving the quality of the second composite material tape 10, and making the formed second composite material tape 10 better meet the needs of high-speed winding of the electrode core.

[0072] In one embodiment, the electrode core winding device further comprises a turret 20, the turret 20 is 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 gluing station 2003; in the first pole piece 2 conveying direction, the second composite assembly 9 and the winding station 2002 are provided with a main drive assembly 14, the main drive assembly 14 is used for driving the second composite material tape 10 to move towards the winding station 2002.

[0073] Specifically, as shown in Figure 1As shown, the turret 20 includes a winding station 2002 and a tail-end adhesive application station 2003, and the winding station 2002 and the tail-end adhesive application station 2003 are both provided with a winding needle 2001, and the winding needle 2001 has an extended state and a retracted state. The turret 20 is provided with a seventh driving member and an eighth driving member. The seventh driving member can drive the turret 20 to rotate around its own axis by using a rotary motor, a cylinder multi-link mechanism or the like, so as to drive the winding needle 2001 located at the winding station 2002 to flip to the tail-end adhesive application station 2003, or to drive the winding needle 2001 located at the tail-end adhesive application station 2003 to flip to a dispensing station or the winding station 2002. The eighth driving member can drive the winding needle 2001 to rotate around its own axis by using a rotary motor, a linear motor, a cylinder or the like, so as to wind the second composite tape 10 and the second pole piece 43 on the outer surface of the battery cell. The turret 20 is further provided with a ninth driving member, and the ninth driving 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 cylinder or the like.

[0074] In order to be clear, 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".

[0075] In the conveying direction of the first pole piece 2, a main driving assembly 14 is arranged between the second composite assembly 9 and the winding station 2002, and the main driving assembly 14 is used to drive the second composite tape 10 to move towards the winding station 2002, so as to effectively ensure the winding efficiency of the battery cell.

[0076] In addition, in the conveying direction of the first pole piece 2, a composite tape buffer 15 and a composite tape deviation correcting member 16 are arranged between the main driving assembly 14 and the winding station 2002. The composite tape buffer 15 is used to buffer the second composite tape 10, so as to avoid the influence of the second composite tape 10 with too high speed on the winding effect of the winding station 2002. The composite tape deviation correcting member 16 is used to correct the deviation of the second composite tape 10, so as to ensure the winding effect of the winding station 2002 on the second composite tape 10, and prevent the deviated second composite tape 10 from causing the formed battery cell to fail to meet the quality requirement of the battery cell winding.

[0077] In one embodiment, in the conveying direction of the first pole piece 2, a composite tape plug assembly 17 is arranged upstream of the winding station 2002, and the composite tape plug assembly 17 is used to convey the second composite tape 10 to the winding needle 2001. As described above, in the case where the first pole piece cutter 1102 is arranged upstream of the first composite assembly 7, the cutter is not required to be arranged at the composite tape plug assembly 17 or to be actuated.

[0078] Specifically, as shown in Figure 1 The electrode core winding device further comprises a composite tape tab assembly 17 arranged upstream of the winding station 2002. The composite tape tab assembly 17 comprises a composite tape tab roller for feeding the second composite tape 10 to the winding needle 2001 of the winding station 2002 at the beginning of the winding of the first electrode core, so as to effectively ensure the tabbing effect of the second composite tape 10.

[0079] In one embodiment, the electrode core winding device further comprises a second tab tabbing assembly 19 for feeding the second tab 43 to the winding needle 2001 and a second tab cutter 22 for cutting the second tab 43. A cutter assembly 21 is arranged between the winding station 2002 and the end-taping station 2003, and is used to cut the first separator 4 and the second separator 6 between the winding station 2002 and the end-taping station 2003.

[0080] Specifically, as shown in Figure 1 The electrode core winding device further comprises a second tab unwinding assembly 18, a second tab tabbing assembly 19, a second tab cutter 22 and a cutter assembly 21, which are all capable of being mounted on a mounting plate 23. The second tab unwinding assembly 18 is used to unwind the second tab 43 to feed the second tab 43 to the second tab tabbing assembly 19. The second tab tabbing assembly 19 comprises a second tab tabbing roller for feeding 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 cutter assembly 21 is arranged between the winding station 2002 and the end-taping station 2003, and is used to cut the first separator 4 and the second separator 6 between the winding station 2002 and the end-taping station 2003.

[0081] In operation, the second composite material belt insert piece assembly 17 delivers the second composite material belt 10 to the winding needle 2001, the second pole piece insert piece assembly 19 delivers the second pole piece 43 to the winding needle 2001, the winding needle 2001 on the winding station 2002 extends out of the turret 20 under the drive of the ninth driving member, and the winding needle 2001 rotates under the drive of the eighth driving member to simultaneously wind the second composite material belt 10 and the second pole piece 43. The seventh driving member drives the turret 20 to revolve to drive the winding needle 2001 on the winding station 2002 to turn to the finishing and adhesive applying station 2003, and the cutter assembly 21 cuts the second composite material belt 10, at this time, since the first pole piece 2 and the second pole piece 43 have been cut off before the winding station, the cutter assembly 21 only cuts two diaphragms. Compared with the prior art battery cell winding device, the pole piece composite device effectively improves the winding efficiency of the battery cell.

[0082] The above embodiments mainly describe the differences between the embodiments, and the different optimization features between the embodiments can be combined to form a better embodiment without contradiction. For the sake of brevity, the details are not repeated here.

[0083] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, 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 first pole piece unwinding assembly (1), a first diaphragm unwinding assembly (3), a second diaphragm unwinding assembly (5), a first composite assembly (7) and a second composite assembly (9). The first pole piece unwinding assembly (1) is used for conveying a first pole piece (2) to the first composite assembly (7), the first diaphragm unwinding assembly (3) is used for conveying a first diaphragm (4) to the first composite assembly (7), the second diaphragm unwinding assembly (5) is used for conveying a second diaphragm (6) to the first composite assembly (7), and 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-time compounding. 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-time compounding and form a second composite material belt (10). In the conveying direction of the first pole piece (2), a pole piece cutting and inserting assembly (11) is arranged between the first pole piece unwinding assembly (1) and the first composite assembly (7), the pole piece cutting and inserting assembly (11) is used for cutting the first pole piece (2) and conveying the cut first pole piece (2) to the first composite assembly (7).

2. The pole piece composite device of claim 1, wherein, 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.

3. The pole piece composite of claim 1, wherein, The first composite assembly (7) and / or the second composite assembly (9) 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 base (29).

4. The pole piece composite of claim 1, wherein, The first composite roller (24), the first driving member (26), the third driving member (30) and the moving base (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 base (29), and the second driving member (27) can drive the second composite roller (25) to rotate. The third driving member (30) can drive the moving base (29) to move relative to the support (28) so that the second composite roller (25) is close to or away from the first composite roller (24). The moving base (29) comprises a first bearing base (2901), a second bearing base (2902) and a connecting base (31), the connecting base (31) connects the first bearing base (2901) and the second bearing base (2902), and the first bearing base (2901) and the second bearing base (2902) are used for supporting the second composite roller (25).

5. The pole piece composite of claim 4, wherein, ​ The pole piece composite 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 supporting plate (2801) of the support (28); The connecting plate (32) is provided with a limiting piece (34) capable of limiting the movement stroke of the moving seat (29).

6. The pole piece composite of claim 4, wherein, Further comprising a cladding part (35) cladded on the outer surface of the second composite roller (25).

7. The pole piece composite of claim 1, wherein, The first composite assembly (7) is provided with at least one of a first heating rod (36) and a first thermocouple (37); And / or, the second composite assembly (9) is provided with at least one of a second heating rod (38) and a second thermocouple (39).

8. An electrode core winding apparatus characterized by comprising: The pole piece composite device according to any one of claims 1-7.

9. The cell winding apparatus according to claim 8, 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 first pole piece (2) conveying direction, a main drive assembly (14) is arranged between the second composite assembly (9) and the winding station (2002), and the main drive assembly (14) is used for driving the second composite material belt (10) to move towards the winding station (2002).

10. The cell winding apparatus according to claim 9, characterized by, In the first pole piece (2) conveying direction, a composite material belt inserting piece assembly (17) is arranged upstream of the winding station (2002), and the composite material belt inserting piece assembly (17) is used for conveying the second composite material belt (10) to the winding needle (2001).

11. The cell winding apparatus according to claim 9, characterized by, Further comprising a second pole piece inserting piece assembly (19) used for conveying the second pole piece (43) to the winding needle (2001), and a second pole piece cutter (22) used for cutting off the second pole piece (43); a cutter assembly (21) is arranged between the winding station (2002) and the end-taped station (2003), and the cutter assembly (21) is used for cutting off the first diaphragm (4) and the second diaphragm (6) between the winding station (2002) and the end-taped station (2003).

Images