CN216120425U

CN216120425U - Blanking device and conveying equipment for die cutting of laminated sheet

Info

Publication number: CN216120425U
Application number: CN202122618111.7U
Authority: CN
Inventors: 高旭; 孙晓辉; 杨树涛
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-22
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a blanking device and a conveying device for lamination die cutting, wherein the blanking device comprises: the blanking device is provided with a blanking area, and the conveyor belt passes through the blanking area; the negative pressure mechanism acts on the conveying belt to form negative pressure below the conveying belt through the through hole for adsorbing the pole piece; the positive and negative pressure mechanism acts on the part of the conveying belt corresponding to the blanking area and can be switched between a negative pressure state and a positive pressure state, negative pressure is formed below the conveying belt when the positive and negative pressure mechanism is in the negative pressure state, and positive pressure is formed below the conveying belt when the positive and negative pressure mechanism is in the positive pressure state. The blanking device for die cutting of the laminated sheet can avoid the contact with the pole piece during the blanking operation of the pole piece, avoid the risk of damage to the surface of the pole piece and effectively reduce the loss of the pole piece.

Description

Blanking device and conveying equipment for die cutting of laminated sheet

Technical Field

The utility model relates to the field of battery processing, in particular to a blanking device and conveying equipment for lamination die cutting.

Background

In the lithium battery industry at the present stage, the lamination process is widely used because the produced battery cell has the characteristics of higher safety and energy density. The last procedure of the lamination process is a die cutting procedure, and the pole piece needs to be transferred into the cartridge clip through a conveying belt.

In the pole piece transfer process, the conveying belt adsorbs the pole piece by means of negative pressure and conveys the pole piece, and when blanking is needed, the pole piece is separated from the conveying belt under the action of the knockout rod.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model aims to provide a blanking device for lamination die cutting, which can solve the problem that the blanking of the pole piece is easy to damage in the prior art.

The utility model also aims to propose a conveying device for a lamination process.

The blanking device for die cutting of the lamination comprises: the blanking device comprises a conveying belt, a plurality of blanking devices and a blanking device, wherein through holes are formed in the conveying belt, a plurality of through holes are formed in the conveying belt along the length direction of the conveying belt, and the conveying belt passes through the blanking regions; the negative pressure mechanism acts on the conveying belt to form negative pressure below the conveying belt through the through hole for adsorbing the pole piece; the positive and negative pressure mechanism acts on the part, corresponding to the blanking area, of the conveying belt and can be switched between a negative pressure state and a positive pressure state, the positive and negative pressure mechanism is in a negative pressure state, negative pressure is formed below the conveying belt, and positive pressure is formed below the conveying belt when the positive and negative pressure mechanism is in a positive pressure state.

According to the blanking device for die cutting of the laminated sheet, the through hole is formed in the conveying belt, the negative pressure mechanism acts on the conveying belt and forms negative pressure below the conveying belt through the through hole, the positive and negative pressure mechanism acts on the part, corresponding to the blanking area, of the conveying belt and can be switched between the negative pressure state and the positive pressure state, negative pressure is formed below the conveying belt when the positive and negative pressure mechanism is in the negative pressure state, positive pressure is formed below the conveying belt when the positive and negative pressure mechanism is in the positive pressure state, contact with the pole piece can be avoided during pole piece blanking operation, the risk that the surface of the pole piece is damaged is avoided, and loss of the pole piece is effectively reduced.

In some embodiments, a plurality of rows of the through holes are formed in the length direction of the conveyor belt, and each row of the through holes is provided in plurality along the width direction of the conveyor belt.

In some embodiments, the positive and negative pressure mechanism comprises: the first air hood is provided with a first opening, and the first opening covers the upper part of the conveyor belt; the first air source mechanism is communicated with the first air hood, the positive and negative pressure mechanism is in a negative pressure state, the first air source mechanism exhausts air into the first air hood, and the first air source mechanism transmits air into the first air hood when the positive and negative pressure mechanism is in a positive pressure state.

In some embodiments, the positive and negative pressure mechanism further comprises: the control piece is in communication connection with the first air source mechanism so that the positive and negative pressure mechanism is switched to the negative pressure state when the positive pressure state exceeds preset time, or the positive and negative pressure mechanism is controlled to be switched to the negative pressure state from the positive pressure state after the pole piece blanking is detected.

In some embodiments, the width of the first air hood is greater than or equal to the width of the blanking area, and the length of the first air hood is greater than or equal to the length of the blanking area.

In some embodiments, the length of the blanking region is equal to or greater than the length of the pole piece.

In some embodiments, the first gas hood is a conical hood, the conical hood includes a large end and a small end, the first opening is disposed on the large end, and the small end is disposed with a vent connected to the first gas source mechanism.

In some embodiments, the blanking device further comprises: and the storage box is arranged below the blanking area and used for storing the falling pole pieces.

In some embodiments, the negative pressure mechanism comprises: the two second gas hoods are arranged on two sides of the blanking area, and are provided with second openings which cover the conveying belt; and the second air source mechanism is connected with the two second air hoods, and can pump air into the second air hoods to form negative pressure below the conveying belt.

According to the embodiment of the utility model, the conveying equipment for the lamination process comprises: the blanking device is the blanking device described above; the first detection mechanism is used for detecting defects of the pole piece; the second detection mechanism is used for detecting the size of the pole piece; the dust removal mechanism is used for negative pressure dust removal of the pole pieces, the first detection mechanism, the second detection mechanism and the dust removal mechanism are sequentially arranged along the conveying direction of the conveying belt, and the blanking device is located on the front side of the dust removal mechanism along the conveying direction.

According to the conveying equipment for the lamination process, the blanking device is arranged, so that the contact with the pole piece can be avoided during the pole piece blanking operation, the risk of damage to the surface of the pole piece is eliminated, and the loss of the pole piece is effectively reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a first schematic diagram of a blanking device according to an embodiment of the present invention;

FIG. 2 is a second schematic diagram of a blanking device in an embodiment of the present invention;

FIG. 3 is a schematic illustration of the mating of the conveyor belt and a second air cowl in an embodiment of the present invention;

FIG. 4 is a schematic illustration of a conveyor belt in an embodiment of the utility model;

fig. 5 is a schematic diagram of a transfer device in an embodiment of the utility model.

Reference numerals:

100. a blanking device;

10. a conveyor belt; 101. a through hole; 102. a blanking area;

20. a negative pressure mechanism;

210. a second gas hood; 220. a second air supply mechanism;

30. a positive and negative pressure mechanism;

310. a first gas hood; 301. a large end; 302. a small end; 3021. a vent; 320. a first air supply mechanism;

40. a material storage box;

1000. a transfer device; 200. a first detection mechanism; 300. a second detection mechanism; 400. a dust removal mechanism; 1. and (6) pole pieces.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A blanking device 100 for lamination die cutting according to an embodiment of the present invention is described below with reference to fig. 1-4.

As shown in fig. 1 to 4, a blanking device 100 for lamination die cutting according to an embodiment of the present invention includes: a conveyor belt 10, a negative pressure mechanism 20 and a positive and negative pressure mechanism 30.

The conveyor belt 10 is provided with a plurality of through holes 101, the through holes 101 are arranged along the length direction of the conveyor belt 10, the blanking device 100 is provided with a blanking area 102, and the conveyor belt 10 passes through the blanking area 102; the negative pressure mechanism 20 acts on the conveyor belt 10 to form negative pressure below the conveyor belt 10 through the through hole 101 for adsorbing the pole piece 1; the positive/negative pressure mechanism 30 acts on a portion of the conveyor belt 10 corresponding to the blanking area 102 and is switchable between a negative pressure state in which the positive/negative pressure mechanism 30 forms a negative pressure below the conveyor belt 10 and a positive pressure state in which the positive/negative pressure mechanism 30 forms a positive pressure below the conveyor belt 10.

When the die cutting is performed, the negative pressure mechanism 20 forms negative pressure below the conveyor belt 10 through the through hole 101 (see fig. 1, an arrow in the figure is an air pressure direction), so that the pole piece 1 is adsorbed at the bottom of the conveyor belt 10, the pole piece 1 is conveyed along with the movement of the conveyor belt 10, wherein the positive and negative pressure mechanism 30 maintains a negative pressure state, and the magnitude of the negative pressure formed below the conveyor belt 10 by the negative pressure mechanism 20 is equal, so that the pole piece can be conveyed along with the movement of the conveyor belt 10 towards the blanking area 102. When the pole piece 1 enters the blanking area 102, the positive and negative pressure mechanism 30 is switched from a negative pressure state to a positive pressure state, the positive and negative pressure mechanism 30 forms a positive pressure below the conveyor belt 10 (see fig. 2, an arrow in the figure is an air pressure direction), the pole piece 1 can be pushed to be separated from the conveyor belt 10, the blanking of the pole piece 1 is realized under the action of gravity, and at the moment when the conveyor belt 10 continues to convey, the positive and negative pressure mechanism 30 returns to the negative pressure state again, and drives the next pole piece 1 to convey to the blanking area 102.

In the blanking process of the pole piece 1, the pole piece 1 is driven to be separated from the negative pressure suction force on the conveying belt 10 without other tools, for example, the pole piece 1 is hit by a material beating rod to be separated from the conveying belt 10, so that the surface of the pole piece 1 can be prevented from being damaged in the blanking operation.

According to the blanking device 100 for lamination die cutting, the through hole 101 is formed in the conveyor belt 10, the negative pressure mechanism 20 acts on the conveyor belt 10 and forms negative pressure below the conveyor belt 10 through the through hole 101, the positive and negative pressure mechanism 30 acts on the part, corresponding to the blanking area 102, of the conveyor belt 10, switching can be performed between a negative pressure state and a positive pressure state, the negative pressure is formed below the conveyor belt 10 when the positive and negative pressure mechanism 30 is in the negative pressure state, the positive pressure is formed below the conveyor belt 10 when the positive and negative pressure mechanism 30 is in the positive pressure state, contact with the pole piece 1 can be avoided during the blanking operation of the pole piece 1, the risk that the surface of the pole piece 1 is damaged is avoided, and loss of the pole piece 1 is effectively reduced.

In some embodiments, as shown in fig. 2 and 3, a plurality of rows of through holes 101 are formed in the length direction of the conveyor belt 10, and each row of through holes 101 is provided in plurality along the width direction of the conveyor belt 10. Through set up the through-hole 101 that distributes compactly on conveyer belt 10 to guarantee that negative pressure mechanism 20 and positive negative pressure mechanism 30 can form the negative pressure below conveyer belt 10, and the size of negative pressure is suitable, thereby ensure to adsorb pole piece 1.

In some embodiments, as shown in fig. 1, positive and negative pressure mechanism 30 includes: a first air hood 310 and a first air source mechanism 320, wherein the first air hood 310 is provided with a first opening (not shown), and the first opening covers the upper part of the conveyor belt 10; the first air source mechanism 320 is communicated with the first air hood 310, the first air source mechanism 320 sucks air into the first air hood 310 when the positive and negative pressure mechanism 30 is in a negative pressure state, and the first air source mechanism 320 transmits air into the first air hood 310 when the positive and negative pressure mechanism 30 is in a positive pressure state. The first air hood 310 is not in contact with the conveyor belt 10 when being arranged so as to avoid influencing the movement of the conveyor belt 10, the first opening of the first air hood 310 only needs to cover the upper part of the corresponding blanking area 102 of the conveyor belt 10, and when the first air source mechanism 320 is used for exhausting air into the first air hood 310, negative pressure can be formed below the conveyor belt 10 through the through hole 101, so that the pole piece 1 can be conveyed to the blanking area 102 along with the conveyor belt 10. When the first air source mechanism 320 transmits air into the first air hood 310, positive pressure can be formed below the conveyor belt 10 through the through hole 101, the pole piece 1 is pushed to be separated from the conveyor belt 10, and blanking can be realized on the pole piece 1 under the action of gravity. By adopting the mode, the operation is simple, the positive pressure can uniformly act on the pole piece 1 during blanking, the concentrated stress at a certain position on the pole piece 1 is avoided, and the pole piece 1 can be prevented from being damaged.

In some embodiments, positive and negative pressure mechanism 30 further comprises: and the control part is in communication connection with the first air source mechanism 320, so that the positive and negative pressure mechanism 30 is switched to a negative pressure state when the positive pressure state exceeds the preset time, or the positive and negative pressure mechanism 30 is controlled to be switched to the negative pressure state from the positive pressure state after the blanking of the pole piece 1 is detected. The control piece is used for realizing the rapid switching of air suction and air transmission of the first air source mechanism 320, namely ensuring that the positive and negative pressure mechanism 30 can be rapidly switched between a negative pressure state and a positive pressure state, improving the switching sensitivity and ensuring that the die cutting process of the pole piece 1 can be efficiently carried out.

For example, the time for the first air source mechanism 320 to deliver air may be preset, so that the positive pressure state of the positive and negative pressure mechanism 30 is in a preset time, and when the pole piece 1 is successfully blanked after reaching a specified time, the control element instantaneously controls the first air source mechanism 320 to extract air, so as to form a negative pressure below the conveyor belt 10, thereby ensuring that the material can be timely adsorbed and delivered to the blanking area 102.

Specifically, the control component may be a single chip microcomputer controller, and only needs to control the first air source mechanism 320 to start the air delivery function and start the air suction function after timing when the air delivery function is started.

For example, the blanking device 100 may further include a detecting element, the detecting element is configured to detect a position of the pole piece 1 to determine whether blanking is achieved, and send a message to the control element after detecting that the pole piece 1 is blanked, and the control element controls the first air source mechanism 320 to pump air so as to enable the positive and negative pressure mechanism 30 to be in a negative pressure state. Or, the detecting element is used to detect whether the conveyor belt 10 moves, and it may be set that the conveyor belt 10 stops moving when the pole piece 1 on the conveyor belt 10 reaches the blanking area 102, and after blanking is completed, the conveyor belt 10 moves again, and at this time, the detecting element detects a moving signal of the conveyor belt 10 and sends the signal to the control element, and the control element controls the first air source mechanism 320 to pump air, so that the positive and negative pressure mechanism 30 is in a negative pressure state.

In some embodiments, the first air supply mechanism 320 may include: the control part is in communication connection with the air pumping mechanism and the air conveying mechanism to respectively control air pumping and air conveying, namely, the air pumping and the air conveying are realized by two different mechanisms, and the air pumping mechanism and the air conveying mechanism are easy to control and use.

In some embodiments, the air pumping mechanism and the air delivery mechanism are fans.

In some embodiments, the first air source mechanism 320 may be a fan, and the air suction or air delivery is realized by setting the wind wheel of the fan to rotate.

In some embodiments, the width of the first gas cap 310 is greater than or equal to the width of the blanking area 102, and the length of the first gas cap 310 is greater than or equal to the length of the blanking area 102. The width of the first gas hood 310 may be equal to the width of the blanking area 102 and the length of the first gas hood 310 may be equal to the length of the blanking area 102, or the width of the first gas hood 310 is greater than the width of the blanking area 102 and the length of the first gas hood 310 is greater than the length of the blanking area 102. Adopt this mode to form the negative pressure in order to guarantee all positions homoenergetic of the corresponding blanking region 102 of conveyer belt 10, make all can receive the negative pressure effort on pole piece 1 of conveyer belt 10 below everywhere, can receive even reliable adsorption affinity on pole piece 1, perhaps guarantee that all positions homoenergetic of the corresponding blanking region 102 of conveyer belt 10 can form the malleation, make all can receive the malleation effort on the pole piece 1 of conveyer belt 10 below everywhere, can receive even reliable malleation thrust on the pole piece 1.

In some embodiments, the length of the blanking region 102 is equal to or greater than the length of the pole piece 1. The length of the blanking area 102 can be equal to that of the pole piece 1, or the length of the blanking area 102 is greater than that of the pole piece 1, so that the pole piece 1 can be ensured to be positioned in the shadow of the blanking area 102 and can be better adsorbed on or separated from the conveyor belt 10.

In some embodiments, as shown in FIG. 3, the first gas shield 310 is a conical shield comprising: a large end 301 and a small end 302, a first opening is arranged on the large end 301, a vent port 3021 is arranged on the small end 302, and the vent port 3021 is connected with the first air source mechanism 320. The conical cover can guarantee that the bottom forms great first uncovered covering on conveyer belt 10, enables self volume simultaneously less, save material, sets up blow vent 3021 on the tip 302, and the design is simple, and first air supply mechanism 320 is bled or is defeated gas through blow vent 3021 to realize negative pressure or malleation control.

In some embodiments, as shown in fig. 1 and fig. 2, the blanking device 100 further includes: and the storage box 40 is arranged below the blanking area 102, and is used for storing the fallen pole pieces 1. Alternatively, the magazine 40 may be a cartridge.

In some embodiments, as shown in fig. 1 and 2, the negative pressure mechanism 20 includes: the two second gas hoods 210 are arranged at two sides of the blanking area 102, and a second opening is formed in each second gas hood 210 and covers the upper part of the conveyor belt 10; the second air supply mechanism 220 is connected to the two second air hoods 210, and the second air supply mechanism 220 can pump air into the second air hoods 210 to form negative pressure below the conveyor belt 10. The second air supply mechanism 220 is connected with the two second air covers 210, negative pressure is formed below the conveyor belt 10 through the through hole 101, and the pole piece 1 is adsorbed on the conveyor belt 10.

In some embodiments, second air supply mechanism 220 is a fan.

An embodiment of the blanking device 100 for die cutting of lamination of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the blanking device 100 for lamination die cutting includes: the device comprises a conveyor belt 10, a negative pressure mechanism 20, a positive and negative pressure mechanism 30 and a storage box 40.

The conveyor belt 10 is provided with a plurality of through holes 101, the through holes 101 are arranged in a plurality of rows along the length direction of the conveyor belt 10, the through holes 101 in each row are arranged in a plurality along the width direction of the conveyor belt 10, the blanking device 100 is provided with a blanking area 102, and the conveyor belt 10 passes through the blanking area 102.

The negative pressure mechanism 20 acts on the conveyor belt 10 to form negative pressure below the conveyor belt 10 through the through hole 101 for adsorbing the pole piece 1.

The positive/negative pressure mechanism 30 acts on a portion of the conveyor belt 10 corresponding to the blanking area 102 and is switchable between a negative pressure state in which the positive/negative pressure mechanism 30 forms a negative pressure below the conveyor belt 10 and a positive pressure state in which the positive/negative pressure mechanism 30 forms a positive pressure below the conveyor belt 10.

The positive/negative pressure mechanism 30 includes: the first air hood 310 is provided with a first opening which covers the upper part of the conveyor belt 10; the first air source mechanism 320 is communicated with the first air hood 310, the first air source mechanism 320 sucks air into the first air hood 310 when the positive and negative pressure mechanism 30 is in a negative pressure state, and the first air source mechanism 320 transmits air into the first air hood 310 when the positive and negative pressure mechanism 30 is in a positive pressure state.

The width of the first air hood 310 is equal to the width of the blanking area 102, the length of the first air hood 310 is equal to the length of the blanking area 102, and the length of the blanking area 102 is equal to the length of the pole piece 1.

The first gas shield 310 is a conical shield comprising: a large end 301 and a small end 302, a first opening is arranged on the large end 301, a vent port 3021 is arranged on the small end 302, and the vent port 3021 is connected with the first air source mechanism 320.

The storage box 40 is a cartridge, is arranged below the blanking area 102, and is used for storing the fallen pole pieces 1.

The blanking device 100 for lamination die cutting has the following advantages:

the blanking device 100 of the utility model can achieve the purposes of improving the blanking action and reducing the damage of the pole piece 1 by changing the structural design and the blanking mode of the blanking unit of the die-cutting machine.

As shown in fig. 5, the transfer apparatus 1000 of the lamination process according to the embodiment of the present invention includes: the blanking device 100, the first detection mechanism 200, the second detection mechanism 300 and the dust removal mechanism 400.

The blanking device 100 is the blanking device 100 in the previous paragraph; the first detection mechanism 200 is used for detecting defects of the pole piece 1; the second detection mechanism 300 is used for detecting the size of the pole piece 1; the dust removing mechanism 400 is used for negative pressure dust removal of the pole piece 1, the first detection mechanism 200, the second detection mechanism 300 and the dust removing mechanism 400 are sequentially arranged along the conveying direction of the conveyor belt 10, and the blanking device 100 is located on the front side of the dust removing mechanism 400 along the conveying direction.

Get into conveyer belt 10 after the cross cutting of pole piece 1 is accomplished, rely on the negative pressure on the conveyer belt 10, make the smooth firm absorption of pole piece 1 on the conveyer belt 10 surface, pole piece 1 realizes the flaw through first detection mechanism 200 in proper order and detects, realizes size detection through second detection mechanism 300, realizes the negative pressure through dust removal mechanism 400 and removes dust, passes through doffer 100 blanking at last.

According to the conveying equipment 1000 of the lamination process, the blanking device 100 is arranged, so that the pole piece 1 can be prevented from being contacted with the pole piece 1 during the blanking operation of the pole piece 1, the risk of damage to the surface of the pole piece 1 is avoided, and the loss of the pole piece 1 is reduced.

In some embodiments, the first detection mechanism 200 is a CCD industrial camera.

In some embodiments, the second detection mechanism 300 is a CCD industrial camera.

Other configurations and operations of the blanking device 100 for lamination die cutting according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A blanking device (100) for lamination die cutting, comprising:

the blanking device comprises a conveyor belt (10), through holes (101) are formed in the conveyor belt (10), a plurality of through holes (101) are formed in the length direction of the conveyor belt (10), the blanking device (100) is provided with a blanking area (102), and the conveyor belt (10) passes through the blanking area (102);

the negative pressure mechanism (20) acts on the conveyor belt (10) so as to form negative pressure below the conveyor belt (10) through the through hole (101) for adsorbing the pole piece (1);

positive and negative pressure mechanism (30), positive and negative pressure mechanism (30) are used in conveyer belt (10) correspond on the part of blanking region (102), and can switch between negative pressure state and malleation state, positive and negative pressure mechanism (30) are in when the negative pressure state form the negative pressure below conveyer belt (10), when positive pressure mechanism (30) are in the malleation state form the malleation below conveyer belt (10).

2. The blanking device (100) for lamination die cutting according to claim 1, wherein a plurality of rows of said through holes (101) are provided in the length direction of said conveyor belt (10), and each row of said through holes (101) is provided in plurality along the width direction of said conveyor belt (10).

3. The blanking device (100) for lamination die cutting according to claim 1, wherein the positive and negative pressure mechanism (30) comprises:

the first air hood (310) is provided with a first opening, and the first opening covers the upper part of the conveyor belt (10);

the first air source mechanism (320), the first air source mechanism (320) communicates with the first air hood (310), the first air source mechanism (320) pumps air into the first air hood (310) when the positive and negative pressure mechanism (30) is in the negative pressure state, and the first air source mechanism (320) transmits air into the first air hood (310) when the positive and negative pressure mechanism (30) is in the positive pressure state.

4. The blanking device (100) for lamination die cutting according to claim 3, wherein the positive and negative pressure mechanism (30) further comprises: the control piece is in communication connection with the first air source mechanism (320), so that the positive and negative pressure mechanism (30) is switched to the negative pressure state when the positive pressure state exceeds preset time, or the positive and negative pressure mechanism (30) is controlled to be switched to the negative pressure state from the positive pressure state after the pole piece (1) blanking is detected.

5. The blanking device (100) for lamination die cutting according to claim 3, wherein the width of the first air hood (310) is greater than or equal to the width of the blanking area (102), and the length of the first air hood (310) is greater than or equal to the length of the blanking area (102).

6. The blanking device (100) for lamination die cutting according to claim 5, characterized in that the length of the blanking area (102) is greater than or equal to the length of the pole piece (1).

7. The blanking device (100) for lamination die cutting according to claim 3, wherein the first air cover (310) is a conical cover, the conical cover comprises a large end (301) and a small end (302), the first opening is arranged on the large end (301), a vent hole (3021) is arranged on the small end (302), and the vent hole (3021) is connected with the first air source mechanism (320).

8. The blanking device (100) for lamination die cutting according to claim 1, wherein said blanking device (100) further comprises: the storage box (40) is arranged below the blanking area (102) and used for storing the falling pole pieces (1).

9. The blanking device (100) for lamination die cutting according to claim 1, wherein the negative pressure mechanism (20) comprises:

the two second air hoods (210) are arranged on two sides of the blanking area (102), and second openings are formed in the second air hoods (210) and cover the conveyor belt (10);

and the second air source mechanism (220) is connected with the two second air hoods (210), and the second air source mechanism (220) can pump air into the second air hoods (210) to form negative pressure below the conveyor belt (10).

10. A transfer apparatus (1000) for lamination processes, comprising:

a blanking device (100), the blanking device (100) being the blanking device (100) of any one of claims 1 to 9;

the first detection mechanism (200) is used for detecting defects of the pole piece (1);

a second detection mechanism (300) for detecting the size of the pole piece (1);

the dust removal mechanism (400) is used for negative pressure dust removal of the pole piece (1), the first detection mechanism (200), the second detection mechanism (300) and the dust removal mechanism (400) are sequentially arranged along the conveying direction of the conveying belt (10), and the blanking device (100) is located on the front side of the conveying direction along the dust removal mechanism (400).