CN218238252U - Pole piece conveying auxiliary mechanism and pole piece drying box - Google Patents

Abstract

The utility model provides a pole piece conveying complementary unit and pole piece stoving case, this pole piece conveying complementary unit, a pole piece in the position support conveying is predetermineeing, pole piece width direction's both sides have respectively not been left white district by the coating, this pole piece conveying complementary unit is including the support element that sets up corresponding to at least one of which leaves white district, the support element is including the supporting part of locating pole piece thickness direction both sides, each supporting part includes can order about the annular support area of pivoted because of external force, each support area has the butt in the support surface of leaving white district, inject the passageway that the district passes through of leaving white in order to supply the conveying between two support surfaces. Pole piece conveying complementary unit, through the cooperation of two holding surfaces on two annular support bands, can support pole piece at least one side in the conveying and leave white district, compare in the mode of adopting the backing roll among the prior art, have bigger supporting area to do benefit to the support effect who improves pole piece in the conveying.

Description

Pole piece conveying auxiliary mechanism and pole piece drying box

Technical Field

The utility model relates to a power battery technical field, in particular to pole piece conveying complementary unit. And simultaneously, the utility model discloses still relate to a pole piece stoving case with this pole piece conveying complementary unit.

Background

The foil needs to be coated during the production of lithium batteries. Coating means that the slurry is coated on the surface of the foil at intervals and uniformly by a die head, and the coated pole piece is provided with an uncoated margin area and a coated area. Generally, both sides of the pole piece are blank areas, and the blank areas and the coating areas are alternately arranged along the width direction of the pole piece, namely, the coating part is positioned between two adjacent blank areas.

And the coated pole piece needs to enter a drying box for drying and then is rolled. In the prior art, a drying box is internally provided with nozzles for respectively jetting hot air flow to the upper surface and the lower surface of a pole piece. Support rollers are typically rotatably disposed within the drying oven adjacent the inlet outlet to support the blank areas of the pole pieces so that the pole pieces are dried while being transported within the oven.

However, the pole piece conveyed in the drying box is also subjected to the acting force of the air flow sprayed from the upper nozzle and the lower nozzle, and particularly when the acting force applied to the pole piece by the upper nozzle and the lower nozzle is unbalanced, the pole piece is easy to shake, unevenness of the pole piece is easy to be influenced, the nozzles can scratch the pole piece, and accordingly a defective product is easy to generate. In addition, the pole piece is in the in-process of drying by the stoving incasement, and the margin district that is located the outermost side is heated easily and takes place to warp to influence the planarization of pole piece.

In order to improve the smoothness of the pole piece in the drying box, the mode of increasing the number of the supporting rollers in the box body is generally adopted. However, this method is not good for improving the flatness of the pole piece.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a pole piece conveying complementary unit to improve the supporting effect to pole piece in the transmission, and do benefit to the planarization that improves the pole piece.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a pole piece conveying auxiliary mechanism is used for supporting pole pieces in conveying at a preset position, two sides of the width direction of the pole pieces are respectively provided with uncoated blank areas, the pole piece conveying auxiliary mechanism comprises a supporting unit corresponding to at least one of the blank areas, the supporting unit comprises supporting parts arranged on two sides of the thickness direction of the pole pieces, each supporting part comprises an annular supporting belt capable of rotating under the driving of external force, each supporting belt is provided with a supporting surface abutted against the blank areas, and a channel for the blank areas in conveying to pass through is defined between the two supporting surfaces.

Furthermore, the two supporting surfaces clamp the blank area, and the supporting part comprises a driving part for driving the supporting belt to rotate.

Furthermore, the supporting portion comprises two rotating rollers arranged at intervals along the transmission direction of the pole piece, the supporting belt surrounds the two rotating rollers, one of the rotating rollers bears external force to drive the supporting belt to rotate, and the supporting surface is an outer surface of the supporting belt, which is arranged to face the blank area.

Furthermore, the supporting part also comprises a plurality of press rollers which are rotatably arranged between the two rotating rollers, and the supporting belt can be pressed by the press rollers to keep the supporting surface to be abutted against the blank area.

Furthermore, the supporting part further comprises a plurality of tensioning rollers which are rotatably arranged between the two rotating rollers, the tensioning rollers are arranged at intervals of the blank space, and the supporting belt can be tensioned by the tensioning rollers.

Further, the width of the supporting surface is smaller than or equal to the width of the blank area.

Furthermore, the supporting units are arranged corresponding to the blank regions on two sides, and the distance between the two supporting units in the width direction of the pole piece is adjustable.

Furthermore, the supporting unit comprises a mounting seat, and the two supporting bodies are rotatably arranged on the mounting seat; at least one of the mounting seats can be driven to approach or depart from the other mounting seat so as to adjust the distance between the two supporting units.

Compared with the prior art, the utility model discloses following advantage has:

pole piece conveying complementary unit, through the cooperation of two holding surfaces on two annular support bands, can support the pole piece in the conveying in the at least one side area of staying white, compare in the mode that adopts the backing roll among the prior art, have bigger support area to do benefit to the supporting effect that improves the pole piece in the conveying, and do benefit to the planarization that improves the pole piece.

In addition, the two supporting surfaces clamp the blank leaving area, so that the friction force between the supporting belts and the blank leaving area can be reduced while the pole piece is supported, and the transmission of the pole piece is facilitated. The two rotating rollers have simple structures, and are convenient for mounting and rotating the supporting belt. The arrangement of the compression roller is beneficial to improving the supporting effect of the supporting surface to the blank area. The tension roller is beneficial to improving the stability of the supporting belt in use.

In addition, the width of the supporting surface does not exceed the width of the blank area, so that the supporting surface can be prevented from influencing the coating area coated on the pole piece. The distance between the two supporting units is adjustable, so that the pole pieces with different width specifications can be supported, and the use flexibility is better. The mounting seat is simple in structure and convenient to arrange and is driven to move.

Additionally, another aim at of the utility model provides a pole piece stoving case for pole piece after the stoving coating, pole piece stoving case is including having the box of import and export, in be equipped with in the box as above pole piece conveying complementary unit, pole piece conveying complementary unit is arranged in supporting the conveying the white district of leaving of pole piece.

Furthermore, a feeding roller positioned at the upstream of the inlet is rotatably arranged outside the box body and used for conveying the pole pieces into the box body.

Compared with the prior art, the utility model discloses following advantage has:

pole piece stoving case, through set up as above in the box pole piece conveying complementary unit, do benefit to the planarization that improves the pole piece in the box conveying to improve the quality of pole piece, and have better practicality. In addition, the feed roller is simple in structure and convenient for conveying pole pieces into the box body.

Drawings

The accompanying drawings, which form a part of the present disclosure, are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain the present disclosure. In the drawings:

fig. 1 is a schematic structural view of a pole piece conveying auxiliary mechanism according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a supporting unit according to a first embodiment of the present invention at a viewing angle;

fig. 3 is a schematic structural diagram of the supporting unit according to the first embodiment of the present invention at another viewing angle;

fig. 4 is a schematic structural view of the pole piece conveying auxiliary mechanism according to the second embodiment of the present invention applied in a drying oven at one viewing angle;

fig. 5 is a schematic structural view of the pole piece conveying auxiliary mechanism according to the second embodiment of the present invention, applied to another view angle inside the drying box;

description of reference numerals:

1. pole pieces; 2. a feed roller; 3. a mounting seat; 4. an upper support band; 5. a lower support band; 6. a motor;

101. a white region is left outside; 102. a coating area; 103. an inner white region;

201. a support ring;

301. a slider;

401. an upper rotating roller; 402. an upper compression roller; 403. an upper tension roller;

501. a lower rotating roller; 502. a lower pressing roller; 503. and a lower tension roller.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to a pole piece conveying auxiliary mechanism, which is used for supporting a pole piece 1 in conveying at a preset position, wherein both sides of the pole piece 1 in the width direction are respectively provided with an uncoated blank area. In an overall structure, the pole piece transfer assist mechanism includes a support unit provided corresponding to at least one of the margin regions. The supporting unit comprises supporting parts arranged on two sides of the pole piece 1 in the thickness direction, each supporting part comprises an annular supporting belt which can rotate due to external force driving, each supporting belt is provided with a supporting surface which is abutted against the blank area, and a channel for the blank area in conveying to pass through is defined between the two supporting surfaces.

Based on the above general description, an exemplary structure of the pole piece transfer assisting mechanism described in the present embodiment is shown in fig. 1. The pole piece 1 in transport can be in particular a pole piece 1 after coating has been completed, which has four blank areas and three coating areas 102. For convenience of description, in the present embodiment, the margin regions located on both sides of the pole piece 1 in the width direction are referred to as outer margin regions 101, and the margin region located between the outer margin regions 101 is referred to as an inner margin region 103. Three coating zones 102 are located between the two outer whitespace zones 101 and are separated by two inner whitespace zones 103. Of course, the number and specification of the coating area 102 and the inner margin area 103 on the pole piece 1 can be adjusted according to the specific use requirement.

As a preferable embodiment, the supporting unit in this embodiment is disposed corresponding to the two outer blank areas 101, so as to achieve a better supporting effect in the transmission of the pole piece 1. The position of the supporting unit is the position where the pole piece 1 needs to be supported, that is, the preset position. Of course, it is also possible that the supporting units are provided only corresponding to one of the outer margin regions 101, but the supporting effect on the pole piece 1 is not as good as that when the supporting units are provided on both sides.

In this embodiment, the two support surfaces clamp the outer margin 101, and the support portions include drive portions for driving the support bands to rotate. Here, through the clamping of two supporting surfaces to the outer margin area 101, the tension and the flatness of the pole piece 1 in the transmission process are improved, and the pole piece 1 is effectively prevented from deforming, wrinkling and the like in the transmission process. The driving part drives the supporting belt to rotate, so that the friction force of the pole piece 1 in the transmission process can be reduced, and the supporting effect on the pole piece 1 is improved. In addition, the driving part can also be used as a power source for driving the pole piece 1 to transmit, and at this time, the supporting unit can also play a role in transmitting the pole piece 1 besides supporting the pole piece 1.

It will be appreciated that in addition to the drive section being used to rotate the support bands in this embodiment, the support bands may also rotate due to the frictional forces between the margins 101 and the support bands during transport. However, the transmission of the pole piece 1 is driven by another external driving force.

The supporting portion in this embodiment includes two rollers spaced apart from each other along the conveying direction of the pole piece 1, the supporting belt surrounds the two rollers, one roller receives an external force to drive the supporting belt to rotate, and the supporting surface is an outer surface of the supporting belt facing the outer margin region 101. In specific implementation, the power output end of the driving part is connected with one roller of the driving part so as to drive the two rollers and the supporting belt to rotate. The roller in this embodiment has a simple structure, and is convenient for mounting and rotating the support belt.

In order to improve the use effect of the supporting belt, the supporting portion in this embodiment further includes a plurality of pressing rollers rotatably disposed between the two rotating rollers, and the supporting belt can be pressed by the pressing rollers to maintain the supporting surface in abutment with the outer margin area 101. In addition, the supporting part also comprises a plurality of tensioning rollers which are rotatably arranged between the two rotating rollers, the tensioning rollers are arranged at intervals with the outer white space 101, and the supporting belt can be tensioned by the tensioning rollers.

Through setting up the compression roller in this implementation, do benefit to the butt effect that improves holding surface and outer margin 101 to improve the planarization of pole piece 1 in the conveying. The tension roller is beneficial to improving the stability of the supporting belt in use by tensioning the supporting belt, so that the use effect of the supporting belt can be further improved.

In detail, as shown in fig. 2 and 3, two support portions are provided above and below the outer margin 101, respectively, in the present embodiment, to support the pole piece 1 in conveyance in the horizontal direction. For convenience of description, in the present embodiment, the support located above the outer margin area 101 is referred to as an upper support, the support band on the upper support is referred to as an upper support band 4, the support band located below the outer margin area 101 is referred to as a lower support, and the support band on the lower support is referred to as a lower support band 5.

In the concrete structure, the mounting seats 3 are respectively arranged on two sides of the pole piece 1, and the upper supporting part and the lower supporting part which are positioned on the same side of the pole piece 1 are both arranged on the corresponding mounting seats 3. The mounting base 3 is plate-shaped and can be mounted on a carrier as a mounting carrier. Here, the mount pad 3 is simple in structure, convenient to arrange and implement, and excellent in use effect.

As a preferred embodiment, the upper support part and the lower support part are symmetrically arranged on both sides of the pole piece 1, and the structure of the upper support part is explained in the present embodiment. As shown in fig. 3, two upper rollers 401 in this embodiment are provided on the mount 3 to be rotatable about their axes. By adjusting the distance between the two upper rollers 401, the contact length and the supporting effect of the upper supporting surface on the upper supporting belt 4 with the outer margin 101 can be adjusted. Of course, even an asymmetrical arrangement of the upper support and the lower support is possible.

In this embodiment, the pressing roller on the upper supporting portion is two upper pressing rollers 402 rotatably disposed on the mounting base 3 and located between the two upper rotating rollers 401. Each upper press roll 402 is parallel to the axis of the upper press roll 401. And each upper press roller 402 abuts on the inner surface of the upper support belt 4 corresponding to the upper support surface, thereby abutting the upper support surface on the outer margin 101.

The tension roller of the upper support part in this embodiment is rotatably disposed on the mounting base 3 and is located between the two upper press rollers 402, and the two upper tension rollers 403 are located above the upper press rollers 402. The upper support belt 4 is looped around the upper rotating roller 401, the upper pressing roller 402, and the upper tension roller 403, and each of the two upper tension rollers 403 abuts on the inner surface above the upper support belt 4 and supports the upper support belt 4 upward, thereby improving the tensioning effect of the upper support belt 4. Because of the arrangement of two upper tension rollers 403, the upper support belt 4 in this embodiment is an isosceles trapezoid.

The lower support portion in this embodiment is disposed below the upper support portion with the plane of the outer margin 101 as a plane of symmetry. As shown in fig. 3, a lower pressing roller 501, a lower tension roller 502, and a lower tension roller 503 are rotatably provided on mount 3 in correspondence with upper pressing roller 401, upper pressing roller 402, and upper tension roller 403. And because the upper press roll 402 and the lower press roll 502 are symmetrically arranged, the upper press roll and the lower press roll have better supporting and conveying effects on the outer margin area 101 through the upper supporting surface and the lower supporting surface.

It should be noted that in the present embodiment, the width of the upper support surface and the width of the lower support surface are both less than or equal to the width of the outer margin region 101. With such an arrangement, while supporting the blank region 101, the influence on the coating region 102 can be reduced, thereby improving the quality of the pole piece 1. In addition, in this embodiment, the number of the upper pressing roller 402 and the upper tension roller 403 can be adaptively increased or decreased according to specific arrangement requirements.

As an embodiment, the transmission speed of the upper support belt 4 and the lower support belt 5 in this embodiment is matched with the transmission speed of the pole piece 1, that is, the pole piece 1 can be transmitted at a preset speed under the rotation of the upper support belt 4 and the lower support belt 5. It should be noted that the upper support belt 4 and the lower support belt 5 rotate in opposite directions to ensure smooth rightward transport of the pole pieces 1. Referring to fig. 2, when the pole piece 1 is transferred to the right, the upper support band 4 rotates counterclockwise and the lower support band 5 rotates clockwise.

The above-mentioned driving part can adopt a motor 6 in the prior art, and the motor 6 is installed on the installation seat 3 and can be connected with only one upper rotating roller 401 or one lower rotating roller 501. At this time, one of the upper support belt 4 and the lower support belt 5 is driven to rotate by the motor 6, and the other of the upper support belt 4 and the lower support belt 5 is rotated by the frictional force between the upper support surface and the outer margin region 101 and between the outer margin region 101 and the lower support surface, thereby supporting and transferring the pole piece 1. In addition, the motors 6 in the embodiment can also be two motors which are arranged on the mounting seat 3, and in this case, each motor 6 can independently drive the upper support belt 4 and the lower support belt 5 to rotate.

In order to improve the versatility of the pole piece conveying auxiliary mechanism in the present embodiment in use, in the present embodiment, at least one of the mounting seats 3 may be driven to approach or depart from another mounting seat 3 to form an adjustment of the distance between the two supporting units, so as to support pole pieces 1 with different width specifications.

In particular, with continued reference to the illustration in fig. 2, a cylinder is provided on the carrier body, corresponding to one of the mounting seats 3, the cylinder rod of which can be connected to the mounting seat 3. Here, can order about this mount pad 3 through the cylinder and remove along the width direction of pole piece 1, and can change the interval between two support units according to the specification of pole piece 1 to can support the pole piece 1 of different width specifications.

In order to further increase the stability of the mounting base 3 during movement, in the present embodiment the mounting base 3 connected to the cylinder rod is guided to slide on the carrier. As shown in fig. 2 and 3, two sliders 301 are provided at the top of the mounting base 3 at intervals, and corresponding to each slider 301, a slide rail may be provided on the carrier. During the process that the air cylinder drives the mounting base 3 to move, the sliding block 301 slides in the sliding rail. Here, the slider 301 and the slide rail have simple structures, are convenient to arrange and implement, and have good use stability.

The pole piece conveying auxiliary mechanism of this embodiment, through the cooperation of two holding surfaces on two annular support bands, can support pole piece 1 at least one side whitewashed out area in the conveying, compare in the mode that adopts the backing roll among the prior art, have bigger bearing area to do benefit to and improve the supporting effect to pole piece 1 in the conveying, and do benefit to and improve the planarization of pole piece 1.

Example two

The embodiment relates to a pole piece drying box, which is used for drying a coated pole piece 1. On the whole constitution, this pole piece stoving case is including the box that has import and export, is equipped with the pole piece conveying complementary unit of embodiment one in the box, and pole piece conveying complementary unit is arranged in supporting the margin district of the pole piece 1 in the conveying.

It should be noted that, the box body in this embodiment and the drying device used for drying the pole piece 1 in the box body can both adopt mature structures in the prior art. For example, the drying apparatus employs a plurality of upper and lower nozzles disposed on upper and lower sides of the pole piece 1.

To facilitate the transfer of the pole pieces 1 inside the box, as shown in figures 4 and 5, outside the box there is rotatably provided a feed roller 2 upstream of the inlet, the feed roller 2 serving to transfer the pole pieces 1 inside the box. Corresponding to each blank area on the pole piece 1, in the embodiment, a radially outward protruding support ring 201 is arranged on the outer peripheral wall of the feed roller 2. Because of the setting of support ring 201, in the transfer process of pole piece 1 to feed roller 2, the coating district 102 on the pole piece 1 can not contact with feed roller 2 to have better conveying effect.

In order to improve the supporting effect on the pole piece 1 during transmission, in this embodiment, two pole piece transmission auxiliary mechanisms arranged at intervals are arranged in the transmission direction of the pole piece 1, and each pole piece transmission auxiliary mechanism includes a supporting unit arranged on two sides of the pole piece 1. Of course, according to specific use requirements, the number of the pole piece transmission auxiliary mechanisms arranged in the box body can be increased or decreased in an adaptive manner.

Specifically, the mounting base 3 is mounted on the box, and the carrier in the first embodiment is specifically the box here, that is, the mounting bases 3 are all mounted in the box. It should be noted that, in consideration of the high temperature inside the drying box, in order to ensure the use effect and stability of the supporting unit, the supporting belt in this embodiment is made of a high temperature resistant material. For example, a high temperature resistant rubber material is used.

Preferably, the support belt is driven in rotation by a drive, for example a motor 6, the two support surfaces being arranged to grip the whitespace. So do benefit to the support element at pole piece 1 tensioning pole piece 1 in width direction to can prevent to leave the deformation of blank area 101 in the stoving in-process outward, simultaneously, even when the effort of upper nozzle and lower nozzle jetting on pole piece 1 is uneven, pole piece 1 also is difficult for taking place deformation and fold etc. thereby does benefit to and keeps pole piece leveling.

In addition, in the embodiment, the pole piece conveying auxiliary mechanism is arranged in the box body, so that the pole piece 1 can be conveniently processed when the belt is broken in the box body. Specifically, when the pole piece 1 is broken in the box body, the temperature in the box body is waited for cooling, then the motor 6 in the pole piece conveying auxiliary mechanism positioned at the upstream is started in the box body to drive the pole piece 1 to convey backwards, at the moment, the pole piece 1 conveyed out of the pole piece conveying auxiliary mechanism at the upstream is manually placed between two supporting surfaces of the pole piece conveying auxiliary mechanism positioned at the downstream, and the treatment of the broken belt connection can be completed along with the rotation of the supporting belts.

This embodiment pole piece stoving case through set up as above in the box pole piece conveying complementary unit, does benefit to and improves the planarization and the stability of pole piece 1 in the box conveying for pole piece 1 is difficult for taking place the shake and is out of shape, thereby does benefit to the quality that improves pole piece 1, and has better practicality.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A pole piece conveying auxiliary mechanism is used for supporting a pole piece (1) in conveying at a preset position, and two sides of the width direction of the pole piece (1) are respectively provided with an uncoated blank area, and the auxiliary mechanism is characterized in that: the pole piece conveying auxiliary mechanism comprises a supporting unit which is arranged corresponding to at least one of the blank areas, the supporting unit comprises supporting parts which are arranged on two sides of the pole piece (1) in the thickness direction, each supporting part comprises an annular supporting belt which can rotate under the drive of external force, each supporting belt is provided with a supporting surface which abuts against the blank area, and a channel through which the blank area in conveying passes is defined between the two supporting surfaces.

2. The pole piece transport assist mechanism of claim 1, wherein:

the two supporting surfaces clamp the blank area, and the supporting part comprises a driving part for driving the supporting belt to rotate.

3. The pole piece transport assist mechanism of claim 1, wherein:

the supporting part comprises two rotating rollers which are arranged at intervals along the transmission direction of the pole piece (1), the supporting belt surrounds the two rotating rollers, one rotating roller bears external force to drive the supporting belt to rotate, and the supporting surface is the outer surface of the supporting belt which is arranged towards the blank area.

4. The pole piece transport assist mechanism of claim 3, wherein:

the supporting part also comprises a plurality of press rollers which are rotatably arranged between the two rotary rollers, and the supporting belt can be pressed by the press rollers to keep the supporting surface in abutting connection with the blank area.

5. The pole piece transfer assist mechanism of claim 3, wherein:

the supporting part is still including rotating and locating two a plurality of tensioning rollers between the commentaries on classics roller, the tensioning roller with leave white district interval and set up, just the support area can by the tensioning roller tensioning.

6. The pole piece transport assist mechanism of claim 1, wherein:

the width of the supporting surface is smaller than or equal to the width of the white space.

7. The pole piece transfer assist mechanism of any one of claims 1 to 6, wherein:

the supporting units are arranged corresponding to the blank areas on the two sides, and the distance between the two supporting units in the width direction of the pole piece (1) is adjustable.

8. The pole piece transport assist mechanism of claim 7, wherein:

the supporting unit comprises a mounting seat (3), and the two supporting belts are rotatably arranged on the mounting seat (3);

at least one of the mounting seats (3) can be driven to approach or depart from the other mounting seat (3) so as to adjust the distance between the two supporting units.

9. The utility model provides a pole piece stoving case for pole piece (1) after the stoving coating, its characterized in that: the pole piece drying box comprises a box body with an inlet and an outlet, wherein the pole piece conveying auxiliary mechanism as claimed in any one of claims 1 to 8 is arranged in the box body, and the pole piece conveying auxiliary mechanism is used for supporting a blank area of the pole piece (1) in conveying.

10. The pole piece drying box of claim 9, wherein:

and a feeding roller (2) positioned at the upstream of the inlet is rotatably arranged outside the box body, and the feeding roller (2) is used for conveying the pole pieces (1) into the box body.

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