Pole piece blanking mechanism, detection mechanism and die cutting equipment

Abstract

The utility model relates to the technical field of battery production, in particular to a pole piece discharging mechanism, a detection mechanism and die cutting equipment, the pole piece discharging mechanism comprises a machine body, a conveying belt and a discharging piece, a first cavity is formed in the machine body, the first cavity is used for forming a negative pressure environment, a first air hole is formed in the outer wall of the machine body, and the first air hole communicates with the first cavity; the conveying belt is located at the first air hole, and a belt hole is formed in the conveying belt; the discharging piece is arranged in the first cavity, the discharging piece moves to a first position to enable the first air hole to be communicated with the first cavity, and a negative pressure environment is formed at the first air hole so that the pole piece can be adsorbed to the conveying belt to move along with the conveying belt; and the blanking piece moves to the second position to enable the first air hole to be disconnected from the first cavity, so that the pole piece originally adsorbed on the conveying belt loses adhesive force, and falls off from the conveying belt under the action of gravity to realize active blanking. And no contact with the pole piece exists in the blanking process, so that the pole piece is prevented from being damaged.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a pole piece blanking mechanism, a testing mechanism and a die-cutting device. Background Art

[0002] There is a slicing process in the production process of lithium-ion batteries. After coating and rolling, the positive and negative electrode rolls are cut into single pole pieces of target size by die-cutting equipment. After cutting into single pole pieces, the positive and negative poles are alternately stacked on the stacking machine. The pole pieces are cut into target size by die-cutting machines. First, the laser cuts out the size of the pole ear, and then the cutting knife cuts them into pole pieces according to the positioning of the pole ear. During the transmission of the pole piece by the belt, the CCD will detect the size and surface defects. Finally, the pole piece is knocked off the belt by the unloading mechanism and falls into the corresponding clip.

[0003] At present, most of the unloading mechanisms of die-cutting equipment are physical unloading rods that push the pole piece off the belt and fall into the clip. In order to realize the unloading function, the transmission belt is divided into strips, and the purpose is to install a downward pressing unloading rod between the strips of the belt. The unloading rod works after receiving the unloading signal from the PLC communication of the equipment, and pushes the pole piece off the transmission belt. This physical contact unloading method is easy to cause damage to the pole piece, affecting the product yield and production cost. Utility Model Content

[0004] The present application provides a pole piece feeding mechanism, a detection mechanism and a die-cutting device, which are used to solve the problem in the prior art that the pole piece feeding method of pushing the pole piece feeding by a feeding rod easily causes pole piece damage.

[0005] On the one hand, the present application provides a pole piece blanking mechanism, comprising:

[0006] A machine body, wherein a first cavity is formed inside the machine body, the first cavity is used to form a negative pressure environment, and a first air hole is opened on the outer wall of the machine body, the first air hole is connected to the first cavity;

[0007] A conveyor belt is located at the first air hole, and a belt hole is opened on the conveyor belt;

[0008] The blanking piece is arranged in the first cavity and has a first position and a second position. The blanking piece keeps the first air hole connected to the first cavity by moving to the first position, and disconnects the first air hole from the first cavity by moving to the second position.

[0009] In a possible design, the blanking piece has a covering portion, and the blanking piece is moved to the second position so that the covering portion covers the first air hole.

[0010] In one possible design, a second cavity is formed inside the unloading piece, the second cavity is used to form a positive pressure environment, a second air hole is opened on the covering part, the second air hole is connected to the second cavity, and the material piece is moved to the second position to connect the first air hole with the second air hole.

[0011] In a possible design, the covering portion and the inner wall of the first cavity are in contact with each other, and the blanking piece moves to the first position so that the inner wall of the first cavity covers the second air hole.

[0012] In a possible design, the covering portion includes spaced protrusions, the blanking piece moves to the first position so that the first air hole is located in the gap between two adjacent protrusions, and the blanking piece moves to the second position so that the protrusion covers the first air hole.

[0013] In a possible design, the first air hole is a strip hole, the length direction of the strip hole is parallel to the length direction of the protrusion, and the width of the strip hole is not greater than the width of the protrusion.

[0014] In a possible design, the spacing between two adjacent rows of strip holes is equal to the width of the strip holes; the spacing between two adjacent protrusions is equal to the width of the protrusions; and the width of the protrusions is equal to the width of the strip holes.

[0015] In a possible design, the pole piece unloading mechanism further includes:

[0016] A guide rail is arranged on the inner wall of the first cavity and is slidably connected to the blanking piece, and the length direction of the guide rail is perpendicular to the length direction of the protrusion;

[0017] The driving member is arranged on the inner wall of the first cavity and is used for driving the blanking member to slide along the guide rail.

[0018] On the other hand, the present application also provides a pole piece detection mechanism, including the pole piece feeding mechanism as described above.

[0019] On the other hand, the present application also provides a die-cutting device, including the pole piece blanking mechanism as described above.

[0020] The beneficial effects of this application are as follows:

[0021] The electrode unloading mechanism provided by the present application is provided with an unloading piece in the first cavity of the machine body, and the unloading piece can move between the first position and the second position. When the unloading piece is in the first position, the first air hole is connected with the first cavity, so that a negative pressure environment is formed at the first air hole to adsorb the electrode on the conveyor belt and move with the conveyor belt; when the unloading piece is in the second position, the first air hole is disconnected from the first cavity, thereby breaking the negative pressure environment at the first air hole, so that the electrode originally adsorbed on the conveyor belt loses its adhesion, and falls from the conveyor belt under the action of gravity to realize active unloading. This active unloading method will not have physical contact with the electrode during the entire unloading process, and will not cause damage to the electrode.

[0022] The pole piece detection mechanism provided in the present application includes the pole piece feeding mechanism in the present application, and therefore also includes all the above-mentioned advantages of the pole piece feeding mechanism.

[0023] The die-cutting equipment provided in the present application includes the pole piece blanking mechanism in the present application, and therefore also includes all the above-mentioned advantages of the pole piece blanking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a top view of a pole piece blanking mechanism in the prior art;

[0026] Figure 2 It is a front view of a pole piece blanking mechanism in the prior art;

[0027] Figure 3 It is a side view of a pole piece unloading mechanism in the prior art;

[0028] Figure 4 A top view of a pole piece feeding mechanism provided in one embodiment of the present application;

[0029] Figure 5 A front view of a pole piece feeding mechanism provided in one embodiment of the present application;

[0030] Figure 6 A side view of a pole piece unloading mechanism provided for one embodiment of the present application.

[0031] Reference numerals:

[0032] 1'-negative pressure chamber; 2'-transmission belt, 3'-unloading rod, 4'-unloading plate;

[0033] 100 - machine body, 110 - first cavity, 120 - first air hole, 200 - conveyor belt, 300 - blanking piece, 310 - covering part, 311 - protrusion, 312 - second air hole, 320 - second cavity, 400 - guide rail. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] At present, the unloading of die-cutting equipment is that the unloading push rod presses down the pole piece to push the pole piece off the transmission belt 2'. Figure 1-Figure 3 As shown, the negative pressure chambers 1' are arranged at intervals, each of which is provided with a negative pressure hole, and each of which corresponds to a transmission belt 2', and the electrode piece is adsorbed on the transmission belt 2' by negative pressure. A discharge rod 3' is provided between two adjacent negative pressure chambers 1', and a discharge plate 4' is connected to the lower end of the discharge rod 3'. The discharge rod 3' moves downward to drive the discharge plate 4' to push the electrode piece on the transmission belt 2' off the transmission belt 2' to achieve discharge. The above-mentioned disadvantages of physical contact discharge by the discharge push rod are as follows:

[0036] The negative pressure chamber 1' should be made into a split type, and each split negative pressure chamber 1' should have a separate air port;

[0037] The split negative pressure chamber 1' needs to be equipped with a split transmission belt 2'. The width of the transmission belt 2' is 100mm and the length is greater than 10000mm. The edge of the transmission belt 2' is prone to warping and bulging.

[0038] Since the gap between the adjacent negative pressure chamber 1' and the transmission belt 2' is only 50mm, the width of the blanking plate 4' is 30mm, and the blanking rod 3' is 20mm, the gap is very small. If the transmission belt 2' deviates slightly, it will rub against the blanking rod 3' or the blanking plate 4' to produce foreign matter. The environment of the battery cell process has very strict requirements on foreign matter control. There is a great risk that foreign matter produced by friction falls on the pole piece, which increases the risk of the battery cell process.

[0039] When the pole piece is traveling on the transmission belt 2', due to the existence of gaps and the warping of the belt edge, the pole piece will have marks or scratches;

[0040] Since the pole piece is transported on the split transmission belt 2', the pole piece is not in a completely flat state. When passing through the defect CCD inspection, the distance and color difference will affect the accuracy of visual inspection, which will increase the risk of defective pole pieces flowing out;

[0041] The blanking method is a method of blanking by physical contact of the blanking plate 4', which may cause scratches and other damages to the pole piece to varying degrees;

[0042] In general, the damage to electrodes and the outflow of defective electrodes have seriously affected product yield and production costs.

[0043] Combine the following Figure 4-Figure 6 , describing the electrode unloading mechanism provided in the embodiment of the present application, including a body 100, a conveyor belt 200 and a unloading piece 300, a first cavity 110 is formed inside the body 100, the first cavity 110 is used to form a negative pressure environment, the outer wall of the body 100 is provided with a first air hole 120, the first air hole 120 is connected with the first cavity 110; the conveyor belt 200 is located at the first air hole 120, and the conveyor belt 200 is provided with a belt hole; the unloading piece 300 is arranged in the first cavity 110, the unloading piece 300 has a first position and a second position, the unloading piece 300 keeps the first air hole 120 connected with the first cavity 110 by moving to the first position, and disconnects the first air hole 120 from the first cavity 110 by moving to the second position. In some of the embodiments, the lower end surface of the body 100 is a plane, a plurality of first air holes 120 are opened on the lower end surface of the body 100, a plurality of belt holes are opened on the conveyor belt 200, the upper end surface of the conveyor belt 200 is opposite to the lower end surface of the body 100, and the lower end surface of the conveyor belt 200 is used to convey the electrode sheet. Specifically, the first cavity 110 is connected to the vacuum equipment to form a negative pressure environment in the first cavity 110, and the electrode sheet is adsorbed under the conveyor belt under the action of the negative pressure, and is transported to the next workstation as the conveyor belt moves. In some embodiments, the blanking piece 300 is shaped to match the first air hole 120, and the blanking piece 300 can approach the first air hole 120 to reach the first position or move away from the first air hole 120 to reach the second position, wherein when the blanking piece 300 moves to the first position, it is separated from the first air hole 120, so that the first air hole 120 and the first cavity 110 remain connected; when the blanking piece 300 moves to the second position, it can block the first air hole 120, thereby cutting off the connection between the first cavity 110 and the first air hole 120.

[0044] By using the technical solution of the above embodiment, by setting the unloading piece 300 in the first cavity 110 of the machine body 100, the unloading piece 300 can move between the first position and the second position. When the unloading piece 300 is in the first position, the first air hole 120 is kept in communication with the first cavity 110, so that a negative pressure environment is formed at the first air hole 120 to adsorb the electrode piece on the conveyor belt 200 and move with the conveyor belt 200; when the unloading piece 300 is in the second position, the first air hole 120 is disconnected from the first cavity 110, thereby breaking the negative pressure environment at the first air hole 120, so that the electrode piece originally adsorbed on the conveyor belt 200 loses its adhesion and falls from the conveyor belt 200 under the action of gravity to realize active unloading. This active unloading method will not have physical contact with the electrode piece during the entire unloading process, and will not cause damage to the electrode piece.

[0045] It should be noted that, since the blanking piece 300 is entirely arranged in the first cavity 110, the body 100 can be integrated, so that the entire first cavity 110 can be uniformly connected to the air intake port; correspondingly, the conveyor belt 200 can also be integrated to avoid warping of the edges of the split conveyor belt 200, so as to prevent the edges of the conveyor belt 200 from leaving indentations and scratching the pole pieces; at the same time, the integrated conveyor belt 200 can make the surface of the conveyor belt 200 smoother, which will greatly improve the accuracy of defective CCD detection and reduce the risk of defective product outflow and misjudgment.

[0046] Reference Figure 4 , Figure 5 , Figure 6 As shown, in some embodiments of the present application, the blanking member 300 has a covering portion 310, and the blanking member 300 moves to the second position so that the covering portion 310 covers the first air hole 120. In some embodiments, the covering portion 310 is plate-shaped, and the covering portion 310 blocks the first air hole 120 by covering the end of the first air hole 120. In this way, the accuracy requirement for the moving distance of the covering portion 310 does not need to be too high relative to the covering portion 310 entering the first air hole 120 to block the first air hole 120. For ease of understanding, Figure 4 Two left and right blanking pieces 300 are shown in the figure, among which the blanking piece 300 on the left is in the second position, i.e. the blanking state, at which the blanking plate on the left covers the first air hole 120, and correspondingly, the electrode piece under the blanking plate on the left falls into the clip due to the loss of negative pressure adsorption force; the blanking piece 300 on the right is in the first position, i.e. the non-blanking state, at which the blanking plate does not cover the first air hole 120, and the electrode piece under the blanking plate on the right is conveyed backward along the conveyor belt 200 under the action of the negative pressure adsorption force.

[0047] Reference Figure 5 , Figure 6As shown, in some embodiments of the present application, a second cavity 320 is formed inside the blanking piece 300, and the second cavity 320 is used to form a positive pressure environment. A second air hole 312 is opened on the cover 310, and the second air hole 312 is connected to the second cavity 320. The blanking piece is moved to the second position to connect the first air hole 120 with the second air hole 312. In some embodiments, the second cavity 320 is connected to a blower, and air is blown into the second cavity 320 by the blower, and the air is blown out through the second air hole 312 on the bottom surface of the cover 310; when the cover 310 moves to the second position, the bottom surface of the cover 310 abuts against the inner bottom wall of the first cavity 110, thereby disconnecting the first air hole 120 from the first cavity 110 and connecting the first air hole 120 with the second air hole 312, so that air is blown out from the first air hole 120, thereby blowing the pole piece under the blanking plate into the clip. In this way, by setting the second cavity 320 to a positive pressure environment, air is blown out from the second air hole 312 and the first air hole 120 in sequence to blow off the pole piece, so that the pole piece can be quickly separated from the conveyor belt 200 and accurately fall into the clip without contacting the pole piece.

[0048] Reference Figure 5 , Figure 6 As shown, in some embodiments of the present application, the covering portion 310 and the inner wall of the first cavity 110 are in contact with each other, and the blanking member 300 moves to the first position so that the inner wall of the first cavity 110 covers the second air hole 312 . Specifically, the bottom surface of the covering portion 310 is a plane that fits with the inner bottom surface of the first cavity 110. When the blanking piece 300 moves from the first position to the second position, the bottom surface of the covering portion 310 slides along the inner bottom surface of the first cavity 110 and always fits with the inner bottom surface of the first cavity 110 to ensure that when the blanking piece 300 is in the first position, the inner bottom surface of the first cavity 110 completely covers the second air hole 312 to prevent air from being blown out of the second air hole 312; at the same time, when the blanking piece 300 is in the second position, the bottom surface of the covering portion 310 can completely block the first air hole 120 from the first cavity 110 and keep the first air hole 120 and the second air hole 312 connected to allow air to be blown out of the second air hole 312.

[0049] Reference Figure 6As shown, in some embodiments of the present application, the covering portion 310 includes spaced protrusions 311, and the blanking piece 300 moves to the first position so that the first air hole 120 is located in the gap between two adjacent protrusions 311, and the blanking piece 300 moves to the second position so that the protrusion 311 covers the first air hole 120. In this way, when the first air hole 120 is located in the gap between two adjacent protrusions 311, the first air hole 120 is equivalent to being connected with the first cavity 110, and at this time, the first air hole 120 is negative pressure, and correspondingly, the pole piece is adsorbed under the conveyor belt 200; when the first air hole 120 is covered by the protrusion 311, the first air hole 120 is equivalent to being disconnected from the first cavity 110 and reconnected with the second air hole 312, and at this time, the first air hole 120 is positive pressure, and correspondingly, the pole piece is blown down into the clip under the conveyor belt 200.

[0050] Reference Figure 4 As shown, in some embodiments of the present application, the first air hole 120 is a strip hole, the length direction of the strip hole is parallel to the length direction of the protrusion 311, and the width of the strip hole is not greater than the width of the protrusion 311. This ensures that when the lower material 300 is located at the second position, the first air hole 120 can be completely covered by the protrusion 311, and the first air hole 120 is completely disconnected from the first cavity 110.

[0051] Reference Figure 4 As shown, in some embodiments of the present application, the spacing between two adjacent rows of strip holes is equal to the width of the strip holes; the spacing between two adjacent protrusions 311 is equal to the width of the protrusion 311; the width of the protrusion 311 is equal to the width of the strip hole. For example, the width of the protrusion 311, the spacing between two adjacent protrusions 311, the width of the strip hole, and the spacing between two adjacent rows of strip holes are all 30 mm. In the non-feeding state, such as Figure 4 The blanking piece 300 on the middle right side, the protrusion 311 is located between two adjacent rows of strip holes, so that the negative pressure environment of the first air hole 120 will not be affected; in the blanking state, the blanking piece 300 moves downward 30mm to the second position, such as Figure 4 The blanking piece 300 on the middle left side makes the protrusion 311 cover the strip hole, and the second air hole 312 on the protrusion 311 is connected to the strip hole, so that the negative pressure environment of the first air hole 120 is changed into a positive pressure environment; the blanking piece 300 is arranged in this way to achieve the switching between the negative pressure environment and the positive pressure environment at the first air hole 120 by moving a very small distance.

[0052] Reference Figure 5 , Figure 6As shown, in some embodiments of the present application, the pole piece unloading mechanism further includes a guide rail 400 and a driving member, the guide rail 400 is arranged on the inner wall of the first cavity 110, the guide rail 400 is slidably connected with the unloading member 300, and the length direction of the guide rail 400 is perpendicular to the length direction of the protrusion 311; the driving member is arranged on the inner wall of the first cavity 110, and the driving member is used to drive the unloading member 300 to slide along the guide rail 400. In some specific embodiments, the guide rail 400 is installed on the inner top wall of the first cavity 110, and the unloading member 300 can slide left and right along the guide rail 400. The driving member can be a motor or an electric push rod or a cylinder or a hydraulic cylinder, and the driving member can drive the unloading member 300 to move left and right on the guide rail 400, so that the unloading member 300 switches between the first position and the second position.

[0053] The general working principle of the electrode unloading mechanism of the embodiment of the present application is as follows:

[0054] When the PLC communication system of the device sends a blanking signal to the blanking motor, the blanking motor drives the blanking piece 300 to move 30 mm on the guide rail 400, and the protrusion 311 moves to the first air hole 120 to cover the corresponding first air hole 120 (such as Figure 4 At the same time, the second air hole 312 on the bottom surface of the protrusion 311 is connected with the first air hole 120 so that the first air hole 120 blows out positive pressure gas, and the electrode piece will fall off from the lower end of the conveyor belt 200 to the lower clip; when a material unloading process is completed, the unloading motor drives the unloading piece 300 to reset (such as Figure 4 The protrusion 311 will stay in the middle of the two rows of first air holes 120, and the two protrusions 311 are not connected, so the negative pressure environment at the first air holes 120 will not be affected.

[0055] The electrode unloading mechanism of the embodiment of the present application has at least the following beneficial effects:

[0056] 1. The suspended material discharge method can make the current first chamber into an integrated one, and the integrated first chamber reduces the negative pressure equipment access structure;

[0057] 2. The integrated conveyor belt 200 will be smoother, avoiding the warping of the edges of each separate conveyor belt 200, and will not cause indentations, scratches, and other problems to the pole piece.

[0058] 3. When the conveyor belt 200 is in a very flat state, the accuracy of defect CCD detection will be greatly improved, reducing the risk of defective products flowing out and the occurrence of misjudgment;

[0059] 4. The blanking plate and blanking rod can be omitted, completely solving the problem of 200° friction between the blanking rod and the conveyor belt;

[0060] 5. Floating material will not have physical contact with the electrode, so it will not cause damage, thereby improving product yield and reducing production costs.

[0061] A pole piece detection mechanism is also provided in the embodiment of the present application, including the pole piece feeding mechanism in the above embodiment, which also includes all the advantages of the pole piece feeding mechanism, which will not be repeated here.

[0062] A die-cutting device is also provided in an embodiment of the present application, including the electrode blanking mechanism in the above embodiment, which also includes all the advantages of the electrode blanking mechanism, which will not be repeated here.

[0063] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pole piece unloading mechanism, characterized in that: include: A body, wherein a first cavity is formed inside the body, the first cavity is used to form a negative pressure environment, and a first air hole is opened on the outer wall of the body, the first air hole is connected to the first cavity; A conveyor belt, located at the first air hole, and having belt holes; The blanking piece is arranged in the first cavity and has a first position and a second position. The blanking piece keeps the first air hole connected with the first cavity by moving to the first position, and disconnects the first air hole from the first cavity by moving to the second position.

2. The electrode blanking mechanism according to claim 1 is characterized in that: The blanking piece has a covering portion, and the blanking piece moves to the second position so that the covering portion covers the first air hole.

3. The electrode blanking mechanism according to claim 2 is characterized in that: A second cavity is formed inside the blanking piece, and the second cavity is used to form a positive pressure environment. A second air hole is opened on the covering part, and the second air hole is connected with the second cavity. The blanking piece is moved to the second position to connect the first air hole with the second air hole.

4. The electrode blanking mechanism according to claim 3 is characterized in that: The covering portion is in contact with the inner wall of the first cavity, and the blanking piece moves to the first position so that the inner wall of the first cavity covers the second air hole.

5. The electrode blanking mechanism according to any one of claims 2 to 4, characterized in that: The covering portion includes protrusions arranged at intervals, and the blanking piece moves to a first position so that the first air hole is located in a gap between two adjacent protrusions, and moves to a second position so that the protrusion covers the first air hole.

6. The electrode blanking mechanism according to claim 5, characterized in that: The first air hole is a strip-shaped hole, the length direction of the strip-shaped hole is parallel to the length direction of the bump, and the width of the strip-shaped hole is not greater than the width of the bump.

7. The electrode blanking mechanism according to claim 6, characterized in that: The spacing between two adjacent rows of the strip-shaped holes is equal to the width of the strip-shaped holes; the spacing between two adjacent convex blocks is equal to the width of the convex blocks; and the width of the convex blocks is equal to the width of the strip-shaped holes.

8. The electrode sheet unloading mechanism according to claim 7, characterized in that: Also includes: A guide rail is provided on the inner wall of the first cavity and is slidably connected to the blanking member, wherein the length direction of the guide rail is perpendicular to the length direction of the protrusion; A driving member is arranged on the inner wall of the first cavity and is used for driving the blanking member to slide along the guide rail.

9. A pole piece detection mechanism, characterized in that: It comprises the pole piece unloading mechanism described in any one of claims 1-8.

10. A die-cutting device, characterized in that: It comprises the pole piece unloading mechanism described in any one of claims 1-8.

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