CN220144420U - Lug bending assembly, lug bending device and winding equipment - Google Patents

Abstract

The utility model discloses a tab bending assembly, a tab bending device and winding equipment, wherein the tab bending assembly comprises: a mounting base; the connecting piece is connected with the mounting seat in a sliding manner in the X direction; the bending piece is arranged at one end part of the connecting piece and is used for bending the lug; the limiting piece is fixedly connected with the connecting piece; the elastic piece is arranged between the limiting piece and the mounting seat; in the state that the bending piece receives the pressing force in the X direction, the elastic piece provides elastic force opposite to the pressing force direction for the bending piece. The technical scheme provided by the utility model can improve the bending effect of the tab, thereby improving the product quality.

Description

Lug bending assembly, lug bending device and winding equipment

Technical Field

The utility model belongs to the technical field of lithium battery manufacturing equipment, and particularly relates to a tab bending assembly, a tab bending device and winding equipment.

Background

In the manufacturing process of the lithium battery, a material belt (comprising a positive plate, a negative plate and a diaphragm) is required to be wound to form an electric core. And a plurality of tabs are arranged or formed on the positive plate and the negative plate.

The multipolar lug is cut into a small-width lug on the pole piece by adopting a laser mode, a slit with the width of 0.1mm or other widths is only cut between the lug and the lug, and the multipolar lug on the pole piece needs to be uniformly bent towards the center direction of the cross section of the battery cell in the winding process of the pole piece.

In the battery cell winding process, the lug on two sides of a winding needle feeding belt is required to be bent, after the bending piece of the existing lug bending device reaches a bending station, the bending piece is in rigid contact with the lug, the problem that the supporting pressure is too large or too small is usually caused between the lug and the lug, the problem is more serious along with the increase of the diameter of the battery cell due to the winding of the material belt, and therefore the lug bending effect is poor and the quality is low.

There is a need for improvements in tab bending assemblies.

Disclosure of Invention

The embodiment of the utility model aims to provide a tab bending assembly, a tab bending device and winding equipment.

According to a first aspect of an embodiment of the present utility model, there is provided a tab bending assembly, including:

a mounting base;

the connecting piece is connected with the mounting seat in a sliding manner in the X direction;

the bending piece is arranged at one end part of the connecting piece and is used for propping against the lug, and the battery cell rotates to drive the bending piece to rotate and bend the lug;

the limiting piece is fixedly connected with the connecting piece;

the elastic piece is arranged between the limiting piece and the mounting seat;

in the state that the bending piece receives the pressing force in the X direction, the elastic piece provides elastic force opposite to the pressing force direction for the bending piece.

Optionally, the connecting piece is a guide rod, and the limiting piece is a limiting block;

the mounting seat is provided with a first guide hole;

the limiting block is provided with a second guide hole;

the guide rod passes through the first guide hole and is in sliding connection with the mounting seat, and the guide rod passes through the second guide hole and is fixedly connected with the limiting block;

the elastic piece is sleeved on the guide rod.

Optionally, the tab bending assembly further includes a first limiting rod, where the first limiting rod is used to adjust the pretightening force of the elastic element.

Optionally, the tab bending assembly further comprises a mounting block, and the other end part of the connecting piece is fixedly connected with the mounting block;

the mounting block is provided with a threaded hole, the first limiting rod is in threaded fit with the threaded hole, and the end part of the first limiting rod can be abutted to the mounting seat.

Optionally, the bending piece is a guide wheel with a conical surface, and the conical surface is used for pressing the tab;

or, the bending piece is a ball, and the ball is used for pressing the lug.

According to a second aspect of the embodiment of the present utility model, there is provided a tab bending device, including:

the lug bending assembly is arranged on the fixing seat;

the first driving assembly is connected with the fixing base, and can drive the fixing base to move towards the battery cell or gradually increase along with the battery cell so far, and can drive the fixing base to gradually keep away from the battery cell.

Optionally, the fixing seat is provided with a second driving component and a third driving component;

at least two lug bending assemblies;

one of the lug bending assemblies is connected with the second driving assembly, and the second driving assembly can drive the lug bending assembly to move along the X direction;

the other tab bending component is connected with the third driving component, and the third driving component can drive the tab bending component to move along the X direction.

Optionally, the mounting seat of the tab bending component is provided with a limiting hole formed along the Z direction, the second driving component and/or the third driving component is provided with a second limiting rod, the second limiting rod is inserted into the limiting hole, and the mounting seat can move in the Z direction relative to the second limiting rod through the limiting hole so as to adjust the distance between the two tab bending components.

Optionally, the tab bending device further includes a first pressing portion, a second pressing portion, and a cutting assembly, which are disposed on the fixing base, and the first pressing portion, the cutting assembly, and the second pressing portion are sequentially disposed along the Y direction;

the first pressing part comprises a fourth driving assembly and a first roller, the fourth driving assembly is connected with the first roller, and the fourth driving assembly can drive the first roller to move in the X direction;

the second pressing part comprises a fifth driving component and a second roller, the sixth driving component is connected with the second roller, and the fifth driving component can drive the second roller to move in the X direction;

the cutting assembly comprises a sixth driving assembly and a cutter, the sixth driving assembly is connected with the cutter, and the sixth driving assembly can drive the cutter to move in the X direction.

According to a third aspect of an embodiment of the present utility model, there is provided a winding apparatus including:

the turret is provided with a winding needle which is used for winding the material strip into a battery core;

according to the tab bending device, the tab bending component of the tab bending device can bend the tab.

Optionally, a guide plate is mounted on the turret;

the first pressing part and the second pressing part of the tab bending device can move towards the guide plate so as to press the material belt on the guide plate;

the cutting assembly of the tab bending device can move towards the guide plate so as to cut the material belt pressed on the guide plate.

The technical effect of the embodiment of the utility model is that the elastic piece is arranged between the limiting piece and the mounting seat, and the connecting piece is in sliding fit with the mounting seat in the X direction, so that the bending piece can be elastically contacted with the tab, the bending piece can be always flexibly pressed against the tab, the bending effect of the tab is improved, and the quality of a product is improved.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural diagram of a tab bending assembly according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a tab bending device according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an operating state of two tab bending assemblies according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating a tab bending device according to another embodiment of the present utility model;

FIG. 5 is a schematic view of a winding apparatus according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a winding apparatus in another embodiment of the present utility model.

Reference numerals illustrate:

a tab bending device 100; the first tab bending assembly 1; a second lug bending assembly 2; a second drive assembly 3; a second stopper rod 31; a third drive assembly 4; a fixing seat 5; a first drive assembly 6; a first pressing portion 7; a fourth drive assembly 71; a first roller 72; a second pressing portion 8; a fifth drive assembly 81; a second roller 82; a cutting assembly 9; a sixth drive assembly 91; a cutter 92;

a winding device 200; a turret 20; a turntable 201; a winding needle 202; a winding station 203; a cutting station 204; a blanking station 205; a guide plate 206; a recess 2061; a guide 2062;

a tape feeding mechanism 300; a cell 400; a tab 401; a material strip 402;

the tab bending assembly 500; a mounting base 51; a first guide hole 511; a limiting hole 512; a stopper 52; a second guide hole 521; a connecting member 53; guide wheels 54; a tapered surface 541; an elastic member 55; a support shaft 56; a mounting block 57; a threaded hole 571; a first stop lever 58.

Detailed Description

Various exemplary embodiments of the present utility model 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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

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

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

First, referring to fig. 4 and 5, reference is made to the X direction, the Y direction, and the Z direction in the embodiments of the present utility model for convenience of explanation, not limitation.

According to a first aspect of the embodiment of the present utility model, there is provided a tab bending assembly 500, including a mounting seat 51, a connecting piece 53, a bending piece, a limiting piece, and an elastic piece 55, where the connecting piece 53 is slidably connected with the mounting seat 51 in an X direction; the bending piece is arranged at one end of the connecting piece 53, and is used for bending the tab 401; the limiting piece is fixed with the connecting piece 53; the elastic member 55 is disposed between the limiting member and the mounting seat 51; in a state where the bending member receives the pressing force in the X direction, the elastic member 55 provides the bending member with an elastic force in a direction opposite to the pressing force.

In the process of winding the material strip 402 consisting of the positive electrode plate, the negative electrode plate and the diaphragm into the battery cell, the tab bending assembly 500 is used for bending the tab on the battery cell 400. In general, the bending piece of the tab bending assembly 500 is in rigid contact with the tab 401, the diameter of the battery cell gradually increases in the process of winding the material strip 402 into the battery cell, when the distance between the bending piece and the tab is adjusted, more precise adjustment is needed, otherwise, the situation that the pressure between the bending piece and the tab is too large or too small is caused, which is not beneficial to bending the tab. Although the material tape 402, the battery cell 400, the tab 401, etc. are described in the present utility model, the material tape 402, the battery cell 400, the tab 401 cannot be regarded as a part of the tab bending assembly 500, the tab bending device 100, and the winding apparatus 200 for the purpose of more clearly explaining the operation principle of the tab bending assembly 500, the tab bending device 100, and the winding apparatus 200.

Further, the mount 51 is slidably connected to the connector 53 in the X direction.

In one embodiment, the mounting base 51 is provided with a guide rail, and the connecting piece 53 is provided with a slider, which is slidably connected to the guide rail and is movable in the X direction in the guide rail.

In another embodiment, the mounting seat 51 is provided with a guide hole, the connecting piece 53 is slidably connected to the guide hole, and the connecting piece 53 can move in the X direction in the guide hole.

Further, the stopper is fixedly connected to the connecting member 53.

In one embodiment, the limiting member may be a limiting member 52, and the limiting member 52 is fixedly connected to the connecting member 53.

In another embodiment, the limiting member is a protrusion machined on the connecting member 53, in which case the protrusion may still be considered as fixedly connected to the connecting member 53.

The elastic member 55 may be a coil spring, an air spring, or the like.

Further illustratively, the resilient member 55 is disposed between the limiter and the mount 51. When the bending piece is close to the lug, the bending piece bends the lug 401, the bending piece correspondingly receives the pressing force from the lug 401, if the low pressure is too high, the bending piece can move along with the connecting piece 53 in the direction away from the lug 401, the limiting piece can move along with the connecting piece, the limiting piece can extrude the elastic piece 55, and after the elastic piece 55 is extruded, the bending piece can be provided with an elastic force opposite to the pressing force through the limiting piece, so that the bending piece can be always abutted on the lug 401.

In the embodiment shown in fig. 1, the elastic member 55 is a compression spring, the stopper is located on the side of the mounting seat 51 near the bending member, and the movement of the stopper in the X direction changes the pressure of the elastic member 55. In other embodiments of the present utility model, the elastic member 55 may also be a tension spring, for example, a limiting member is disposed on a side of the mounting seat 51 away from the bending member, two ends of the elastic member 55 are respectively connected to the mounting seat 51 and the limiting member, and at this time, the movement of the limiting member in the X direction changes the tension of the elastic member 55. Whether tension or pressure is provided, the elastic member 55 makes the force between the bending member and the tab 401 softer and adjustable, and as the diameter of the coiled battery cell of the material belt 402 gradually increases, the elastic member 55 can also provide an elastic yielding allowance for the bending member, so that the pressing force applied to the tab 401 cannot be excessive.

Optionally, the connecting piece 53 is a guide rod, and the limiting piece is a limiting block 52; the mounting seat 51 is provided with a first guide hole 511; the limiting block 52 is provided with a second guide hole 521; the guide rod passes through the first guide hole 511 to be in sliding connection with the mounting seat 51, the guide rod passes through the second guide hole 511 to be fixedly connected with the limiting block 52, the sliding connection can be realized through clearance fit and the like between the guide rod and the first guide hole 511, and the fixed connection can be realized through interference fit or welding connection and the like between the guide rod and the second guide hole 511; the elastic piece 55 is sleeved on the guide rod.

As shown in fig. 1, in the embodiment in which the limiting member is the limiting block 52 and the connecting member 53 is a guide rod, the mounting seat 51 is provided with a first guide hole 511, where the first guide hole 511 is disposed along the X direction; the limiting block 52 is provided with a second guide hole 521, wherein the second guide hole 521 is arranged along the X direction; the guide rod passes through the first guide hole 511 and the second guide hole 521, wherein the guide rod is in sliding connection with the first guide hole 511, and the guide rod is fixedly connected with the second guide hole 521, so that the guide rod can move along the X direction in the first guide hole 511, and when the guide rod moves along the X direction, the limiting block 52 can also move along the X direction along with the guide rod; the elastic piece 55 is arranged between the limiting block 52 and the mounting seat 51 and sleeved on the guide rod, and two ends of the elastic piece 55 can be respectively abutted against the limiting block 52 and the mounting seat 51, so that the bending piece can be always abutted against the lug 401, uneven pressure between the bending piece and the lug 401 can be avoided, and inconsistent bending angles or tightness of each layer can be caused. In addition, the limiting block 52 and the guide rod are used as two independent structures, so that the processing requirement on the guide rod is not high. Of course, if the limiting block 52 is a protruding structure formed on the guide rod, such as a flange on the guide rod, the limiting block 52 is fixedly connected to the guide rod, which brings about an advantage of simple assembly process.

Optionally, the tab bending assembly 500 further includes a first limiting rod 58, where the first limiting rod 58 can adjust the pretightening force of the elastic member 55, so that the elastic member 55 can provide a sufficient elastic force for the bending member, so that the bending member can be pressed against the tab.

In one embodiment, the limiting member is provided with a through hole, the mounting seat 51 is provided with a threaded hole, and the first limiting rod 58 is in threaded fit with the threaded hole on the mounting seat 51 after passing through the through hole on the limiting member, for example, the first limiting rod 58 may be a screw rod, and a nut is in threaded connection with the first limiting rod 58 between the limiting member and the bending member, so as to adjust the elastic quantity of the elastic member 55 by adjusting the position of the nut on the first limiting rod 58.

In another embodiment, optionally, the tab bending assembly 500 further includes a mounting block 57, and the second end of the connecting piece 53 is fixedly connected to the mounting block 57; the mounting block 57 is provided with a threaded hole 571, the first stop lever 58 is in threaded fit with the threaded hole 571, and an end portion of the first stop lever 58 can abut against the mounting seat 51. Thus, the pretightening force of the elastic member 55 can be adjusted by rotating the first stopper 58. The advantage of this construction is that the mounting block 57 is located on the side of the mounting block 51 remote from the bending member and is adjusted so that the bending member is not subject to a false collision.

As shown in fig. 1, in one embodiment, the tab bending assembly 500 further includes a mounting block 57, wherein the other end of the connecting piece 53 is fixedly connected with the mounting block 57, and a threaded hole 571 is formed in the mounting block 57, wherein the threaded hole 571 is disposed along the X direction, the first stop lever 58 can pass through the threaded hole 571, the first stop lever 58 is in threaded engagement with the threaded hole 571, an end portion of the first stop lever 58 can abut against the mounting seat 51, and the first stop lever 58 can adjust a distance between the mounting block 57 and the mounting seat 51. By rotating the first limiting rod 58, the distance between the mounting seat 51 and the mounting block 57 can be adjusted, and accordingly the pretightening force of the elastic member 55 can be adjusted, so that the elastic member 55 can provide enough elastic force for the bending member.

Optionally, the bending piece is a guide wheel 54 with a conical surface 541, and the conical surface 541 is used for pressing against the tab 401; or, the bending piece is a ball, and the ball is used for pressing against the tab 401.

Further, the bending member is used for bending the tab 401 on the cell 400. The bending member may be a structure suitable for bending the tab 401, such as a guide wheel 54 or a ball.

As shown in fig. 1, in this embodiment, it is preferable that the guide wheel 54 is provided with a conical surface 541, and an end of the conical surface 541 with a smaller section abuts against the root of the tab 401, so as to bend the tab 401; the inclination of this conical surface 541 can be according to the angle of waiting to buckle of utmost point ear 401, supports through guide pulley 54 and utmost point ear 401 and presses the contact, can make the atress between guide pulley 54 and the utmost point ear 401 more even, and its effect of bending is better to be provided with conical surface 541, can select inclination as required, its compatibility is higher.

Further, the guide rod has a first end and a second end, wherein the first end is an end close to the tab 401 in a bending working state of the tab 401, the second end is an end far away from the tab 401, and the guide wheel 54 is disposed at the first end of the guide rod, and the guide wheel 54 can be abutted against the tab 401;

in a preferred embodiment, the first end of the guide bar is provided with a support shaft 56, one end of the support shaft 56 being connected to the guide bar, the other end of the support shaft 56 being connected to the guide wheel 54, wherein the guide wheel 54 is rotatable relative to the axis of the support shaft 56.

In a preferred embodiment, tab bending assembly 500 includes two guide rods positioned side-by-side with guide wheel 54 positioned on the guide rod adjacent tab 401. The stability of the tab bending assembly 500 can be improved by providing two guide rods.

According to a second aspect of the present utility model, there is provided a tab bending device 100, including at least two tab bending assemblies 500 described above; the pole lug bending assembly 500 is arranged on the fixed seat 5; the first driving component 6, the first driving component 6 is connected with the fixing base 5, the first driving component 6 can drive the fixing base 5 to move towards the battery cell, or gradually increase along with the diameter of the battery cell, and the first driving component 6 can drive the fixing base 5 to gradually keep away from the battery cell 400.

As shown in fig. 2 and 3, the tab bending device 100 includes at least two tab bending assemblies 500, and for clarity, the two tab bending assemblies 500 are respectively labeled as a first tab bending assembly 1 and a second tab bending assembly 2, where the first tab bending assembly 1 and the second tab bending assembly 2 are respectively used for bending tabs 401 at two ends of the battery cell 400.

As shown in fig. 2, the first driving component 6 is connected with the fixing base 5, the first driving component 6 can drive the fixing base 5 to move in the X direction, and the first tab bending component 1 and the second tab bending component 2 are installed on the fixing base 5. When the first driving component 6 drives the fixing seat 5 to move, the first tab bending component 1 and the second tab bending component 2 can be simultaneously driven to move.

Further, when the tab 401 needs to be bent, the first tab bending component 1 and the second tab bending component 2 are driven to approach the tab 401 through the first driving component 6; along with the gradual increase of the diameter of the battery cell 400, the first driving assembly 6 can drive the first tab bending assembly 1 and the second tab bending assembly 2 to move towards one side far away from the tab 401 at the same time so as to adapt to the gradual increase of the diameter of the tab.

In one embodiment, the first drive assembly 6 may be driven by a motor rail, a motor lead screw, a gear drive, or a chain drive.

Optionally, the fixing base 5 is provided with a second driving assembly 3 and a third driving assembly 4; one tab bending assembly 500 is connected with the second driving assembly 3, and the second driving assembly 3 can drive the tab bending assembly 500 to move along the X direction; the other tab bending component 500 is connected to the third driving component 4, and the third driving component 4 can drive the tab bending component 500 to move along the X direction.

As shown in fig. 2, the tab bending device 100 further includes a second driving assembly 3 and a third driving assembly 4, where the second driving assembly 3 and the third driving assembly 4 are both installed on the fixing base 5, and the second driving assembly 3 and the fixing base 5, and the third driving assembly 4 and the fixing base 5 can be connected by bolts, adhesion, welding, or fastening.

As shown in fig. 2 and fig. 3, the second driving component 3 is connected with the first tab bending component 1, and the second driving component 3 can drive the first tab bending component 1 to approach or separate from one tab 401 on the electric core 400 in the X direction; the third driving component 4 is connected with the second tab bending component 2, and the third driving component 4 can drive the second tab bending component 2 to approach or depart from the other tab 401 on the battery cell 400 in the X direction.

Further, in this embodiment, the second driving component 3 is connected with the first tab bending component 1, and the third driving component 4 is connected with the second tab bending component 2, so that the first tab bending component 1 and the second tab bending component 2 can move independently, when the tab 401 needs to be bent, one of the tab bending components 500 and the tab 401 is loose or tight, and then the position relationship between the first tab bending component 1 or the second tab bending component 2 and the tab 401 can be adjusted by the corresponding driving component, thereby improving the automation performance of the tab bending device 100 and improving the quality of products. In addition, when the cutting assembly 9 is needed to cut the material belt 402 as described below, the second driving assembly 3 and the third driving assembly 4 can also drive the first tab bending assembly 1 and the second tab bending assembly 2 to enter the avoiding position, so that the cutting work of the material belt 402 is not affected.

In one embodiment, the second driving assembly 3 may adopt an air cylinder or a hydraulic cylinder, wherein the first tab bending assembly 1 is connected with the piston rod to drive the first tab bending assembly 1 to move; the third driving assembly 4 may adopt an air cylinder or a hydraulic cylinder, wherein the second lug bending assembly 2 is connected with a piston rod to drive the second lug bending assembly 2 to move. In another embodiment, the second driving assembly 3 and the third driving assembly 4 may also adopt a driving mode of a motor screw or a motor guide rail, so long as the first tab bending assembly 1 and the second tab bending assembly 2 can be driven to move in a preset direction.

Optionally, the mounting seat 51 of the tab bending component 500 has a limiting hole 512 formed along the Z direction, the second driving component 3 and/or the third driving component 4 is provided with a second limiting rod 31, the second limiting rod 31 is inserted into the limiting hole 512, and the mounting seat 51 can move relative to the second limiting rod 31 in the Z direction through the limiting hole 512 so as to adjust the distance between the two tab bending components 500.

Further, the mounting seat 51 is provided with a limiting hole 512, and the limiting hole 512 is a long hole or a waist hole and extends in the Z direction. The second stop lever 31 can pass through the stop hole 512, and the stop hole 512 is moved, so that the second stop lever 31 and the stop hole 512 move relatively in the Z direction, and the distance between the first tab bending component 1 and the second tab bending component 2 in the Z direction is adjusted, so that the material belt 402 with different sizes can be adapted.

In one embodiment, the mounting seat 51 of the first tab bending component 1 is provided with a limiting hole 512, the corresponding second driving component 3 is provided with a second limiting rod 31, the limiting hole 512 is matched with the second limiting rod 31, and the first tab bending component 1 moves in the Z direction, so that the distance between the first tab bending component 1 and the second tab bending component 2 in the Z direction is adjusted.

In one embodiment, the mounting seat 51 of the second tab bending component 2 is provided with a limiting hole 512, the corresponding third driving component 4 is provided with a second limiting rod 31, the limiting hole 512 is matched with the second limiting rod 31, and the second tab bending component 2 moves in the Z direction, so that the distance between the first tab bending component 1 and the second tab bending component 2 in the Z direction is adjusted.

In one embodiment, the mounting seat 51 of the first tab bending component 1 is provided with a limiting hole 512, and the second driving component 3 is provided with a second limiting rod 31; the mounting seat 51 of the second lug bending assembly 2 is provided with a limiting hole 512, and the third driving assembly 4 is provided with a second limiting rod 31. The first tab bending component 1 and the second tab bending component 2 can both move in the Z direction, so that the distance between the first tab bending component 1 and the second tab bending component 2 in the Z direction is adjusted.

Optionally, the tab bending device 100 further includes a first pressing portion 7, a second pressing portion 8, and a cutting assembly 9 that are disposed on the fixing base 5, where the first pressing portion 7, the cutting assembly 9, and the second pressing portion 8 are sequentially disposed along the Y direction;

the first pressing part 7 comprises a fourth driving component 71 and a first roller 72, the fourth driving component 71 is connected with the first roller 72, and the fourth driving component 71 can drive the first roller 72 to move in the X direction;

the second pressing part 8 comprises a fifth driving assembly 81 and a second roller 82, the fifth driving assembly 81 is connected with the second roller 82, and the fifth driving assembly 81 can drive the second roller 82 to move in the X direction;

the cutting assembly 9 comprises a sixth driving assembly 91 and a cutter 92, the sixth driving assembly 91 is connected with the cutter 92, and the sixth driving assembly 91 can drive the cutter 92 to move in the X direction.

Further describing, the tab bending device 100 further includes a first pressing portion 7, a second pressing portion 8, and a cutting assembly 9, wherein the cutting assembly 9 is used for cutting the material strip 402, and the first pressing portion 7 and the second pressing portion 8 are used for fixing the material strip 402 when the cutting assembly 9 cuts the material strip 402, so as to facilitate cutting.

As shown in fig. 4, in the Y direction, the first pressing portion 7 is provided adjacent to the tab bending member 500. Wherein the first pressing part 7 is arranged on the fixing seat 5. The first pressing part 7 comprises a first roller 72 and a fourth driving component 71, the first roller 72 is connected with the fourth driving component 71, the fourth driving component 71 can drive the first roller 72 to move in the X direction, before the material belt 402 is cut, the material belt 402 needs to be fixed, the fourth driving component 71 drives the first roller 72 to approach the material belt 402, and the material belt 402 is abutted against the guide plate 206, so that the cutting component 9 is convenient for cutting the material belt 402. The second pressing portion 8 operates in the same principle as the first pressing portion 7 and will not be described in detail.

As shown in fig. 4, in the Y direction, the cutting assembly 9 is disposed between the first pressing portion 7 and the second pressing portion 8, so that the first pressing portion 7 and the second pressing portion 8 are convenient for fixing the material tape 402, and the cutting assembly 9 is convenient for cutting the material tape 402 between the two pressing portions. Further illustratively, the cutting assembly 9 includes a sixth drive assembly 91 and a cutter 92, wherein the cutter 92 is coupled to the sixth drive assembly 91, and the sixth drive assembly 91 is capable of driving the cutter 92 to move in the X-direction so as to cut the web 402 when approaching the web 402 and away from the web 402 after cutting is completed. The second pressing part 8 includes a fifth driving component 81 and a second roller 82, wherein the second roller 82 is connected with the fifth driving component 81, and the fifth driving component 81 can drive the second roller 82 to move in the X direction, so that the second roller 82 can approach or separate from the material belt 402.

Further, the fourth driving unit 71, the fifth driving unit 81, and the sixth driving unit 91 may be driven by an air cylinder, a hydraulic cylinder, a motor rail, or a motor screw.

According to a third aspect of the embodiment of the present utility model, there is provided a winding apparatus 200 comprising a turret 20 and a tab bending device 100 as previously described. The turret 20 is provided with a winding needle 202, and the winding needle 202 is used for winding the material belt 402 into the battery cell 400; the tab bending assembly 500 of the tab bending device 100 can bend the tab 401. Tab bending device 100 can be mounted in any suitable location, such as a housing or equipment enclosure, near turret 20.

As shown in fig. 6, the turret 20 has three stations, namely, a winding station 203, a cutting station 204, and a blanking station 205, wherein the winding station 203 is used for winding the material tape 402 into the battery cells 400, the cutting station 204 is located downstream of the winding station 203 for cutting the material tape 402 after winding is completed, and the blanking station 205 is located downstream of the cutting station 204 for transferring the wound battery cells 400 to a transport area.

As shown in fig. 5, the turret 20 includes a turntable 201 and three winding pins 202, and the three winding pins 202 are uniformly disposed around the center of the turntable 201, wherein the number of winding pins 202 is the same as the number of stations, so that each station can operate simultaneously to improve the working efficiency of the winding apparatus 200.

Further, the tab bending assembly 500 is disposed at the winding station 203, so that before the material strip 402 is wound, the tab bending assembly 500 can move towards the winding needle 202 through the first driving assembly 6, and the tab bending assembly 500 bends the tab 401.

Optionally, the turret 20 is fitted with a guide plate 206; the first pressing part 7 and the second pressing part 8 can move towards the guide plate 206 so as to press the material belt 402 on the guide plate 206; the cutting assembly 9 is able to move towards the guide plate 206 to cut the material strips 402 pressed against the guide plate 206.

As shown in fig. 5, the turret 20 is further provided with guide plates 206, wherein the number of guide plates 206 is the same as the number of winding pins 202, and in the embodiment in which three winding pins 202 are provided, three guide plates 206 are also provided. Since the guide plates 202 rotate with the turret 20, as one of the winding pins 202 rotates from the winding station 203 to the cutting station 204, the guide plates 206 move with it, so each winding pin 202 has a corresponding guide plate 206 to facilitate cutting of the web 402.

As shown in fig. 5, the first pressing part 7, the second pressing part 8 and the cutting assembly 9 are disposed between the winding station 203 and the cutting station 204, when the material tape 402 is wound at the winding station 203, the turret 20 rotates to transfer the wound battery cell 400 to the cutting station 204, the first pressing part 7, the cutting assembly 9 and the second pressing part 8 can move towards the direction of the guide plate 206, wherein the first pressing part 7 and the second pressing part 8 respectively drive the first roller 72 and the second roller 82 to move towards the guide plate 206, so that the first roller 72 and the second roller 82 press the material tape 402 against the guide plate 206, the cutting assembly 9 drives the cutter 92 to move towards the guide plate 206, and the cutter 92 cuts the material tape 402, so that the wound battery cell 400 moves to the blanking station 205 for blanking. In addition to the mechanical cutters 92, the cutting assembly 9 can be laser cut.

In a preferred embodiment, a groove 2061 is provided in the side of the guide plate 206 facing the cutting assembly 9, and when the strip 402 is to be cut, the groove 2061 is positioned opposite the cutter 92, the cutter 92 is moved toward the guide plate 206, and the cutter 92 is moved into the groove 2061 to facilitate cutting the strip 402.

In a preferred embodiment, a guide 2062 is provided at the edge of the guide plate 206, wherein the guide 2062 is arcuate, which may provide a more gradual transition of the web 402 as the web 402 moves along the guide plate 206 from the winding station 203 to the cutting station 204.

In a preferred embodiment, as shown in fig. 6, a web feeding mechanism 300 is further included, wherein the web feeding mechanism 300 is used to transport the web 402 to the winding station 203.

Further, the material strip 402 in the present utility model may be a sheet material, and is mainly used for winding the positive electrode sheet, the negative electrode sheet and the separator together to form a battery cell, so as to bend the tabs 401 at two ends of the electrode sheet.

Further illustrating the operation of the winding apparatus 200: the positive plate, the negative plate and the diaphragm are conveyed to a winding needle 202 positioned on a winding station 203 through a material belt feeding mechanism 300 and are clamped through the winding needle 202; the first driving component 6 drives the fixed seat 5 to approach to the direction of the winding needle 202, so that the bending piece is pressed against the tab 401, the winding needle 202 rotates to realize winding of the material belt 402 on the winding needle 202, meanwhile, the tab bending component 500 bends the tab 401 on the battery cell 400, in the process, if the pressing force between the first tab bending component 1, the second tab bending component 2 and the tab 401 is different or any tab bending component 500 is deviated, buffering can be provided through the elastic piece 55, adjustment can be performed, the diameter of the battery cell 400 can be gradually increased in the winding process of the battery cell 400, and the first driving component 6 can drive the fixed seat 5 to gradually move in the direction away from the winding needle 202 so as to adapt to the gradually increased diameter of the tab 401; after the winding is completed, the first driving assembly 6 drives the fixed seat 5 to move away from the winding needle 202 so as to withdraw from the winding station 203, and the material belt 402 which is wound at the winding station 203 moves towards the cutting station 204 through the rotating turret 20; after moving to the cutting station 204, the first driving assembly 6 drives the fixing seat 5 to move towards the winding station 203, and the second driving assembly 3 and the third driving assembly 4 respectively drive the first bending assembly 1 and the second bending assembly 2 to enter positions avoiding the cutting assembly 9; since the cutting assembly 9, the first pressing portion 7 and the second fixing portion 8 correspond to the position of the guide plate 206 in the X direction, the fourth driving assembly 71 drives the first roller 72 to move toward the guide plate 206, the fifth driving assembly 81 drives the second roller 82 to move toward the guide plate 206, so that the first roller 81 and the second roller 82 press the material strip 402 against the guide plate 206, and the sixth driving assembly 91 drives the cutter 92 to move toward the guide plate 206 to cut the material strip 402; the empty winding needle 202 at the winding station 203 continues to repeat the winding operation described above; the wound cell 400, which is rotated to the blanking station 205 after cutting, is blanked.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (11)

1. The utility model provides a utmost point ear subassembly of bending which characterized in that includes:

a mounting base (51);

the connecting piece (53), the said connecting piece (53) is slidably connected with said mount pad (51) in X direction;

the bending piece is arranged at one end part of the connecting piece (53) and is used for bending the lug;

the limiting piece is fixedly connected with the connecting piece (53);

an elastic member (55), wherein the elastic member (55) is arranged between the limiting member and the mounting seat (51);

the elastic member (55) provides elastic force to the bending member in a direction opposite to the pressing force in a state that the bending member is pressed in the X direction.

2. The tab bending assembly according to claim 1, wherein the connecting piece (53) is a guide rod and the limiting piece is a limiting block (52);

the mounting seat (51) is provided with a first guide hole (511);

the limiting block (52) is provided with a second guide hole (521);

the guide rod passes through the first guide hole (511) to be in sliding connection with the mounting seat (51), and passes through the second guide hole (521) to be fixedly connected with the limiting block (52);

the elastic piece (55) is sleeved on the guide rod.

3. The tab bending assembly of claim 1, wherein the tab bending assembly (500) further comprises a first stop lever (58), the first stop lever (58) being used to adjust the preload of the resilient member (55).

4. A tab bending assembly according to claim 3, wherein the tab bending assembly (500) further comprises a mounting block (57), the other end of the connecting member (53) being fixedly connected to the mounting block (57);

threaded holes (571) are formed in the mounting blocks (57), the first limiting rods (58) are in threaded fit with the threaded holes (571), and the end portions of the first limiting rods (58) can be abutted to the mounting seats (51).

5. The tab bending assembly of claim 1, wherein the bending member is a guide wheel (54) having a tapered surface (541), the tapered surface (541) being configured to press against the tab (401);

or, the bending piece is a ball, and the ball is used for pressing the lug (401).

6. A tab bending device is characterized by comprising:

at least two tab bending assemblies (500) according to any one of claims 1-5;

the pole lug bending assembly (500) is installed with the fixing seat (5);

the first driving assembly (6), the first driving assembly (6) is connected with the fixed seat (5), and the first driving assembly (6) can drive the fixed seat (5) to move towards the battery cell (400); or along with the gradual increase of the diameter of the battery cell (400), the first driving component (6) can drive the fixing seat (5) to be gradually far away from the battery cell (400).

7. The tab bending device of claim 6, wherein,

the fixed seat (5) is provided with a second driving component (3) and a third driving component (4);

one lug bending assembly (500) is connected with the second driving assembly (3), and the second driving assembly (3) can drive the lug bending assembly (500) to move along the X direction;

the other tab bending component (500) is connected with the third driving component (4), and the third driving component (4) can drive the tab bending component (500) to move along the X direction.

8. The tab bending device according to claim 7, wherein the mounting base (51) of the tab bending component (500) is provided with a limiting hole (512) formed along the Z direction, the second driving component (3) and/or the third driving component (4) is provided with a second limiting rod (31), the second limiting rod (31) is inserted into the limiting hole (512), and the mounting base (51) can move in the Z direction relative to the second limiting rod (31) through the limiting hole (512) so as to adjust the distance between the two tab bending components (500).

9. The tab bending device according to claim 6, wherein the tab bending device (100) further comprises a first pressing part (7), a second pressing part (8) and a cutting assembly (9) which are arranged on the fixing base (5), and the first pressing part (7), the cutting assembly (9) and the second pressing part (8) are sequentially arranged along the Y direction;

the first pressing part (7) comprises a fourth driving assembly (71) and a first roller (72), the fourth driving assembly (71) is connected with the first roller (72), and the fourth driving assembly (71) can drive the first roller (72) to move in the X direction;

the second pressing part (8) comprises a fifth driving assembly (81) and a second roller (82), the fifth driving assembly (81) is connected with the second roller (82), and the fifth driving assembly (81) can drive the second roller (82) to move in the X direction;

the cutting assembly (9) comprises a sixth driving assembly (91) and a cutter (92), the sixth driving assembly (91) is connected with the cutter (92), and the sixth driving assembly (91) can drive the cutter (92) to move in the X direction.

10. A winding apparatus, characterized by comprising:

a turret (20), wherein a winding needle (202) is arranged on the turret (20), and the winding needle (202) is used for winding a material belt (402) into a battery cell (400);

the tab bending device (100) according to any one of claims 6-9, wherein the tab bending assembly (500) of the tab bending device (100) is capable of bending a tab (401).

11. The winding device according to claim 10, characterized in that the turret (20) is equipped with a guide plate (206);

the first pressing part (7) and the second pressing part (8) of the tab bending device can move towards the guide plate (206) so as to press the material belt on the guide plate (206);

the cutting assembly (9) of the tab bending device can move towards the guide plate (206) so as to cut the material belt (402) pressed on the guide plate (206).