Pole piece punching device

Abstract

The utility model belongs to the technical field of pole piece production, and particularly relates to a pole piece punching device which comprises a cutting mechanism and a punching mechanism used for driving the cutting mechanism to downwards press and cut pole pieces, the cutting mechanism comprises a cutting assembly and a cutting unit, the cutting assembly comprises a fixing frame and the cutting unit, the fixing frame is installed at the output end of the punching mechanism, and the cutting unit is installed on the fixing frame; the cutting unit is mounted on the fixing frame and is used for cutting the pole piece; the gluing assembly is mounted on the fixing frame and is used for coating a binding agent to the cutting position of the pole piece; the pole piece cutting device has the advantages that a binder is attached to the edge of a cut pole piece, active substances on the surface of the pole piece can be blocked through the binder, the active substances on the surface of the pole piece are prevented from falling off from the edge of the pole piece, and the production quality of the pole piece is improved; meanwhile, the adhesive is used for lubricating the cutting end, so that dry friction between the cutting end of the cutting unit and the pole piece is converted into wet friction, abrasion of the cutting end is reduced, and the service life of the cutting unit is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the production technology field of pole piece, especially relate to a pole piece punching device. BACKGROUND

[0002] Battery pole piece is one of the core components of battery, mainly including positive pole piece and negative pole piece, they bear the charge and discharge function of battery respectively, and the active material on the surface of pole piece is mostly bonded on the current collector by adhesive, in order to pursue that the battery pole piece has higher energy density, usually the use of adhesive is reduced to improve the proportion of active material, thereby the energy density is improved.

[0003] In the prior art, in the cutting preparation of battery pole piece, the punching device is usually used to control the down pressure of cutting knife die, and the foil coated with active material is cut, so that the battery pole piece is prepared. However, due to the reduction of the amount of adhesive used for improving the energy density, the active material on the battery pole piece produced by cutting is prone to dropping along the cutting edge, which affects the production quality. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above-mentioned technical problem, provides a pole piece punching device to reduce the adverse phenomenon of pole piece dropping.

[0005] Therefore, the utility model provides a pole piece punching device, which comprises a cutting mechanism and a punching mechanism for driving the cutting mechanism to cut the pole piece downward, and the cutting mechanism comprises:

[0006] The cutting assembly comprises a fixing frame and a cutting unit, the fixing frame is installed on the output end of the punching mechanism, and the cutting unit is installed on the fixing frame for cutting the pole piece.

[0007] The glue applying assembly is installed on the fixing frame and is used for applying adhesive to the cutting position of the pole piece.

[0008] Further, the cutting unit comprises:

[0009] The knife seat is installed on the fixing frame, and the center of the knife seat is provided with a hollow area.

[0010] The cutting knife is installed on the knife seat and is arranged around the periphery of the hollow area.

[0011] Further, the cutting knife further comprises a pole lug cutting area and a pole piece cutting area.

[0012] Further, the glue applying assembly is located in the pole piece cutting area.

[0013] Further, the glue applying assembly comprises:

[0014] A support is installed in the fixing frame;

[0015] A plurality of glue applying units are installed on the support and are used for applying adhesive to the cutting part of the pole piece.

[0016] Further, the glue applying assembly further comprises:

[0017] A lifting control unit is installed on the fixing frame;

[0018] The support is movably installed in the fixing frame along a third direction, and the lifting control unit is used for driving the support to move along the third direction.

[0019] Further, the plurality of glue applying units comprise a first glue applying unit arranged along a first direction and a second glue applying unit arranged along a second direction.

[0020] Further, the first glue applying unit and the second glue applying unit each comprise:

[0021] A glue applying member is provided with a plurality of glue applying holes and is internally provided with a fluid passage;

[0022] A material conveying pipe is installed on the glue applying member and is communicated with the glue applying holes through the fluid passage;

[0023] The glue applying member is located inside the pole piece cutting area.

[0024] Further, the glue applying assembly further comprises:

[0025] A first driving unit is installed on the support;

[0026] The first glue applying unit is movably installed on the support along the second direction, and the first driving unit is used for driving the first glue applying unit to move along the second direction.

[0027] Further, the glue applying assembly further comprises:

[0028] A second driving unit is installed on the support;

[0029] The second glue applying unit is movably installed on the support along the first direction, and the second driving unit is used for driving the second glue applying unit to move along the first direction.

[0030] The beneficial effects of the utility model are:

[0031] When the cutting unit moves down to the designated position above the electrode, the adhesive application assembly applies adhesive to the electrode. Then, the cutting end of the cutting unit cuts the electrode along the application mark, leaving adhesive adhering to the edges of the cut electrode. This adhesive further bonds the active material on the electrode surface, preventing it from falling off and improving electrode production quality. Simultaneously, during electrode cutting, the cutting end comes into contact with the adhesive, which lubricates the cutting end, transforming dry friction between the cutting end and the electrode into wet friction. This reduces wear on the cutting end and extends the service life of the cutting unit. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0034] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0035] The markings in the diagram are as follows:

[0036] 1. Fixing frame; 2. Blade holder; 21. Hollowed-out area; 3. Cutting blade; 31. Electrode cutting area; 32. Electrode cutting area; 4. Support; 5. Lifting control unit; 6. First gluing unit; 61. First drive unit; 7. Second gluing unit; 71. Second drive unit; 8. Gluing component; 81. Gluing hole; 82. Fluid channel; 9. Material conveying pipe; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be considered as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] Embodiment 1:

[0040] The present embodiment provides a pole piece punching device, comprising a cutting mechanism and a punching mechanism for driving the cutting mechanism to press down and cut the pole piece, the cutting mechanism comprising:

[0041] The cutting assembly comprises a fixed frame 1 and a cutting unit, the fixed frame 1 is mounted on the output end of the punching mechanism, and the cutting unit is mounted on the fixed frame 1 for cutting the pole piece.

[0042] The glue applying assembly is mounted on the fixed frame 1 for applying adhesive to the cutting part of the pole piece.

[0043] In the technical solution, the cutting mechanism is composed of the cutting assembly and the glue applying assembly, the cutting assembly is composed of the fixed frame 1 and the cutting unit mounted on the fixed frame 1, and the glue applying assembly is mounted on the fixed frame 1. The fixed frame 1 is connected to the output end of the punching mechanism (the punching mechanism is not shown in the drawings). When the pole piece is punched, the fixed frame 1 is first driven to move down by the punching mechanism, driving the cutting unit to move down, when the cutting unit moves to the specified position above the pole piece, the glue applying assembly applies adhesive to the pole piece in the oblique downward direction close to the cutting end, and then the punching mechanism further drives the cutting unit to move down, and the cutting end of the cutting unit cuts the pole piece along the trace of the adhesive.

[0044] Through the above structure design, the edge of the cut pole piece will be attached with adhesive, and the adhesive can further bond the active substances on the surface of the pole piece, so as to prevent the active substances on the surface of the pole piece from falling off from the edge of the pole piece, and improve the production quality of the pole piece. In addition, when cutting the pole piece, the cutting end of the cutting unit will contact the adhesive, and the adhesive will lubricate the cutting end, so that the dry friction between the cutting end of the cutting unit and the pole piece is changed to wet friction, reducing the wear of the cutting end and prolonging the service life of the cutting unit.

[0045] Embodiment 2:

[0046] The embodiment provides an electrode sheet punching device, in addition to comprising the technical scheme of the above embodiment, further having the following technical features.

[0047] Further, the cutting unit comprises:

[0048] The knife seat 2 is installed on the fixed frame 1, and the center of the knife seat 2 is provided with a hollow area 21;

[0049] The cutting knife 3 is installed on the knife seat 2, and is provided around the periphery of the hollow area 21.

[0050] In the technical scheme, the knife seat 2 can be a fixed plate, and the hollow area 21 is formed by hollowing out the center position of the fixed plate, and the cutting knife 3 is arranged around the periphery of the hollow area 21, and the glue applying assembly is located in the hollow area 21, so as to facilitate the adhesion of the binder to the electrode sheet. Through the structural design, the weight and production material of the knife seat 2 are reduced, the energy consumption and production cost are reduced, and the economic benefit is improved.

[0051] Further, the cutting knife 3 further comprises an electrode tab cutting area 31 and an electrode sheet cutting area 32. Through the structural design, the cutting unit can directly process the electrode tab area of the electrode sheet from the foil material, improve the cutting precision, reduce material waste, and has high practicability.

[0052] Embodiment 3:

[0053] The embodiment provides an electrode sheet punching device, in addition to comprising the technical scheme of the above embodiment, further having the following technical features.

[0054] Further, the glue applying assembly is located in the electrode sheet cutting area 32.

[0055] In the technical scheme, since the electrode tab area of the electrode sheet is free of active substances, the glue applying assembly does not need to adhere the binder to the edge of the electrode tab, and by locating the glue applying assembly in the electrode sheet cutting area 32, the glue applying assembly will only adhere the binder to the electrode sheet area, so as to ensure that the active substances on the electrode sheet will not fall off and flow into the electrode tab area, and improve the production quality of the electrode sheet.

[0056] Embodiment 4:

[0057] The embodiment provides an electrode sheet punching device, in addition to comprising the technical scheme of the above embodiment, further having the following technical features.

[0058] Further, the glue applying assembly comprises:

[0059] The support 4 is installed in the fixed frame 1;

[0060] The glue applying units are mounted on the support 4 and used to apply adhesive to the cutting part of the pole piece.

[0061] In the technical solution, the glue applying assembly is composed of the support 4 and the glue applying units, the support 4 is mounted on the fixed frame 1 and located in the pole piece cutting area 32, and the glue applying units are mounted along the circumferential side of the support 4 and arranged opposite to the pole piece cutting area 32 of the cutting knife 3. The spraying port of the glue applying unit is obliquely downward arranged toward the pole piece. When the stamping mechanism controls the fixed frame 1 to move downward, the support 4 moves downward together with the fixed frame 1. When the cutting knife 3 is about to contact the foil, the glue applying unit sprays adhesive on the pole piece. The adhesive forms a score line structure facilitating cutting. The pole piece cutting area 32 of the cutting knife 3 cuts the foil along the score line.

[0062] Embodiment 5:

[0063] The embodiment provides a pole piece punching device, in addition to comprising the technical solutions of the above-mentioned embodiments, further has the following technical features.

[0064] Further, the glue applying assembly further comprises:

[0065] The lifting control unit 5 is mounted on the fixed frame 1.

[0066] The support 4 is movably mounted in the fixed frame 1 along the third direction Z, and the lifting control unit 5 is used to drive the support 4 to move along the third direction Z.

[0067] In the technical solution, the support 4 can be movably mounted in the fixed frame 1 along the third direction Z, and the lifting control unit 5 can be a pneumatic cylinder. The lifting control unit 5 is fixedly mounted in the fixed frame 1, and the support 4 is mounted and connected to the output end of the lifting control unit 5. The lifting control unit 5 can control the support 4 to move in the fixed frame 1 along the third direction Z. When the pole piece punching device works, the lifting control unit 5 can be used to control the support 4 to descend first, so that the glue applying units on the support 4 apply adhesive to the pole piece, then the lifting control unit 5 is used to control the support 4 to ascend back to the original position, and then the stamping mechanism is used to control the fixed frame 1 to move downward to cut the pole piece. Through the structural design, the glue applying units are independent of the cutting unit structure, so that the glue applying units can accurately and uniformly cover the adhesive on the cutting part of the pole piece, and the installation distance between the glue applying units and the cutting knife 3 in the third direction Z does not need to be considered, the installation difficulty is reduced, and the troubleshooting and maintenance cost are low.

[0068] Embodiment 6:

[0069] The embodiment provides a pole piece punching device, in addition to comprising the technical solutions of the above-mentioned embodiments, further has the following technical features.

[0070] Further, the several glue applying units include a first glue applying unit 6 arranged along a first direction X and a second glue applying unit 7 arranged along a second direction Y.

[0071] In the technical solution, the first glue applying unit 6 is used for applying the adhesive to the long side of the pole piece, and the second glue applying unit 7 is used for applying the adhesive to the short side of the pole piece, so that the adhesive is effectively ensured to be attached to the edge of the pole piece and the active substance is prevented from falling off.

[0072] Embodiment 7:

[0073] The embodiment provides a pole piece punching device, in addition to comprising the technical solutions of the above embodiments, further having the following technical features.

[0074] Further, the first glue applying unit 6 and the second glue applying unit 7 each include:

[0075] a glue applying piece 8, the glue applying piece 8 is provided with several glue applying holes 81 and is internally provided with a fluid passage 82;

[0076] a material conveying pipe 9, the material conveying pipe 9 is installed on the glue applying piece 8 and is in communication with the glue applying holes 81 through the fluid passage 82;

[0077] The glue applying piece 8 is located inside the pole piece cutting area 32.

[0078] In the technical solution, the glue applying piece 8 can be made of rubber, the fluid passage 82 is internally provided in the glue applying piece 8, the glue applying holes 81 are provided on the surface of the glue applying piece 8 and are in communication with the fluid passage 82, and the other end of the fluid passage 82 is connected with an external material storage mechanism through the material conveying pipe 9. The material storage mechanism is designed to convey the adhesive into the material conveying pipe 9 in a timed and quantitative manner, so that the adhesive can overflow from the glue applying holes 81 when the cutting knife 3 is close to the pole piece, and the adhesive is applied to the pole piece.

[0079] Embodiment 8:

[0080] The embodiment provides a pole piece punching device, in addition to comprising the technical solutions of the above embodiments, further having the following technical features.

[0081] Further, the glue applying assembly further includes:

[0082] a first driving unit, the first driving unit is installed on the support 4;

[0083] The first glue applying unit 6 is movably installed on the support 4 along the second direction Y, and the first driving unit 61 is used for driving the first glue applying unit 6 to move along the second direction Y.

[0084] In this technical solution, the first driving unit 61 can be a needle-type cylinder, and the first coating unit 6 is installed on the output end of the first driving unit 61 through a connecting plate. After the electrode is cut, the lifting control unit 5 controls the bracket 4 to descend separately along the third direction Z to above the electrode. Then, the first driving unit 61 controls the first coating unit 6 to move along the second direction Y. The first coating unit 6 sweeps across the long side of the electrode to clean the burrs generated by the cutting of the long side of the electrode, so as to avoid the burrs perpendicular to the electrode from piercing the separator in subsequent processes and affecting the battery production quality.

[0085] Furthermore, the adhesive application assembly also includes:

[0086] The second drive unit 71 is mounted on the bracket.

[0087] The second glue-applying unit 7 is movably mounted on the bracket 4 along the first direction X, and the second drive unit 71 is used to drive the second glue-applying unit 7 to move along the first direction X.

[0088] With this structural design, the second drive unit 71 can also be a needle cylinder. The second glue application unit 7 is installed on the output end of the second drive unit 71 through a connecting plate. The second drive unit 71 controls the second glue application unit 7 to move along the first direction X. The second glue application unit 7 sweeps across the short side of the electrode sheet to clean the burrs generated at the short side of the electrode sheet.

[0089] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electrode stamping device, comprising a cutting mechanism and a stamping mechanism for driving the cutting mechanism to press down and cut the electrode, characterized in that, The cutting mechanism includes: A cutting assembly, comprising a fixing frame (1) and a cutting unit, wherein the fixing frame (1) is mounted on the output end of the stamping mechanism, and the cutting unit is mounted on the fixing frame (1) for cutting electrode sheets; An adhesive application assembly, which is mounted on a mounting bracket (1), is used to apply adhesive to the cut edges of the electrode sheet.

2. The electrode stamping apparatus according to claim 1, characterized in that, The cutting unit includes: A tool holder (2) is mounted on a fixed frame (1), and a hollow area (21) is provided in the center of the tool holder (2); A cutting blade (3) is mounted on a blade holder (2) and is arranged around the periphery of the cutout area (21).

3. The electrode stamping apparatus according to claim 2, characterized in that, The cutting blade (3) also includes a tab cutting area (31) and a electrode cutting area (32).

4. The electrode stamping apparatus according to claim 3, characterized in that, The adhesive coating assembly is located within the electrode cutting area (32).

5. The electrode stamping apparatus according to claim 4, characterized in that, The adhesive application assembly includes: A bracket (4) is installed inside the fixing frame (1); Several adhesive application units are mounted on a bracket (4) for applying adhesive to the cut edges of the electrode sheet.

6. The electrode stamping apparatus according to claim 5, characterized in that, The adhesive coating assembly also includes: A lifting control unit (5) is mounted on a fixed frame (1); The bracket (4) is movably installed in the fixed frame (1) along the third direction (Z), and the lifting control unit (5) is used to drive the bracket (4) to move along the third direction (Z).

7. The electrode stamping apparatus according to claim 6, characterized in that, The plurality of adhesive coating units include a first adhesive coating unit (6) disposed along a first direction (X) and a second adhesive coating unit (7) disposed along a second direction (Y).

8. The electrode stamping apparatus according to claim 7, characterized in that, Both the first adhesive coating unit (6) and the second adhesive coating unit (7) include: The adhesive coating part (8) has a plurality of adhesive coating holes (81) and a fluid channel (82) inside. Material delivery pipe (9), which is installed on the adhesive coating part (8) and communicates with the adhesive coating hole (81) through the fluid channel (82); The adhesive coating part (8) is located inside the electrode cutting area (32).

9. The electrode stamping apparatus according to claim 7, characterized in that, The adhesive coating assembly also includes: The first drive unit (61) is mounted on the bracket (4); The first glue-applying unit (6) is movably mounted on the bracket (4) along the second direction (Y), and the first drive unit (61) is used to drive the first glue-applying unit (6) to move along the second direction (Y).

10. The electrode stamping apparatus according to claim 7, characterized in that, The adhesive coating assembly also includes: The second drive unit (71) is mounted on the bracket (4); The second glue-applying unit (7) is movably mounted on the bracket (4) along the first direction (X), and the second drive unit (71) is used to drive the second glue-applying unit (7) to move along the first direction (X).

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