Die cutting device

Abstract

The utility model discloses a die cutting device, and relates to the technical field of battery manufacturing. The die cutting device comprises a supporting plate and a positioning mechanism, the supporting plate is used for containing a battery pole piece to be subjected to die cutting, a groove is formed in the supporting plate, the shape of the groove is consistent with that of a die cutting line when the battery pole piece is subjected to die cutting, and the supporting plate is divided into a first fixing area and a second fixing area through the groove; the first fixing area and the second fixing area are used for fixing and supporting the battery pole piece before and after die cutting of the battery pole piece; a plurality of dust collection holes are formed in the groove, and the dust collection holes communicate with a dust collection connector formed in the supporting plate; and the positioning mechanism is used for limiting the battery pole piece. According to the die cutting device provided by the utility model, the shaking phenomenon of the battery pole piece in the cutting process can be avoided, the battery pole piece is prevented from shifting in the cutting process, the processing size is ensured, and the processing precision of a product process is met.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a die-cutting device. Background Technology

[0002] With the rapid development of modern economy and science and technology, the requirements for the cutting process of lithium battery electrodes are becoming increasingly stringent. Currently, the main cutting processes for lithium battery electrodes are: disc shearing, die punching, and laser cutting. Laser cutting, in particular, boasts high production efficiency and good process stability. It utilizes a high-power-density laser beam to irradiate the electrode being cut, causing it to rapidly melt, vaporize, burn, or reach its melting point, forming holes. Simultaneously, as the laser beam moves across the electrode, the holes continuously form narrow kerfs, completing the cutting of the electrode. However, during laser cutting of lithium battery electrodes, the electrode vibrates, affecting the cutting effect. Utility Model Content

[0003] The purpose of this invention is to provide a die-cutting device that can fix the battery electrode sheets before and after the cutting process, prevent the battery electrode sheets from shaking, ensure that the battery electrode sheets do not shift during the cutting process, ensure the processing dimensions, and meet the processing accuracy of the product process.

[0004] To solve the above-mentioned technical problems, this utility model provides a die-cutting device for die-cutting battery electrode sheets, comprising:

[0005] A support plate is provided for placing the battery electrode sheet to be die-cut. The support plate has a groove whose shape corresponds to the die-cutting line during battery electrode sheet die-cutting. The groove divides the support plate into a first fixing area and a second fixing area. Before and after die-cutting, both the first and second fixing areas are used to fix and support the battery electrode sheet. The groove contains several suction holes, which communicate with a suction interface located on the support plate.

[0006] A positioning mechanism, mounted on the support plate, is used to limit the position of the battery electrode.

[0007] The width of the groove is greater than the cutting width during the die-cutting of the battery electrode.

[0008] Optionally, the support plate is provided with one or more air extraction ports, and the surfaces of the first fixing area and the second fixing area are each provided with a plurality of vacuum holes, which converge inside the support plate and are connected to the air extraction ports.

[0009] Optionally, the vacuum port includes a first port and a second port, wherein the first port is used to connect to a plurality of vacuum holes in the first fixed area, and the second port is used to connect to a plurality of vacuum holes in the second fixed area.

[0010] Optionally, the support plate includes an inner support plate and an outer support plate, the surface of the inner support plate is the first fixing area, the surface of the outer support plate is the second fixing area, the second fixing area is arranged around the first fixing area, and the first fixing area and the second fixing area are on the same plane.

[0011] Optionally, the inner support plate and the outer support plate are separate structures. The outer support plate has a recessed space, and the inner support plate is embedded in the recessed space so that the second fixing area surrounds the first fixing area. The groove is the gap between the outer support plate and the inner support plate; or...

[0012] The inner support plate and the outer support plate are separate structures. The outer support plate is a ring-shaped structure, surrounding the periphery of the inner support plate so that the second fixing area surrounds the first fixing area. The groove is the gap between the outer support plate and the inner support plate; or...

[0013] The inner support plate and the outer support plate are an integral structure.

[0014] Optionally, the inner support plate and the outer support plate are fixedly connected by fasteners;

[0015] The recessed space is provided with several positioning posts, and the inner support plate is provided with corresponding positioning holes to facilitate the positioning of the inner support plate and the outer support plate during installation.

[0016] Optionally, a plurality of the suction holes are disposed on the bottom periphery of the recessed space, the suction interface is disposed on the outer support plate, and a suction pipe network is provided inside the outer support plate, the suction pipe network connecting the suction interface and the plurality of suction holes;

[0017] A plurality of vacuum holes are evenly arranged in the first fixed area and the second fixed area respectively. The inner support plate and the outer support plate are both provided with a vacuum pipe network. The first interface is provided on the inner support plate and the second interface is provided on the outer support plate. The first interface is connected to the plurality of vacuum holes in the first fixed area through the vacuum pipe network of the inner support plate, and the second interface is connected to the plurality of vacuum holes in the second fixed area through the vacuum pipe network of the outer support plate.

[0018] Optionally, the outer support plate is provided with a plurality of flow guide grooves, which are disposed through the second fixed area and offset from the vacuum hole, for guiding the gas in the groove during die cutting.

[0019] Optionally, the surface shape of the inner support plate is similar to the shape of the cut battery electrode sheet. The inner support plate includes a main body and a tab portion protruding from the main body. The main body corresponds to the main body of the electrode sheet, and the tab portion corresponds to the tab of the electrode sheet.

[0020] Optionally, the positioning mechanism can be detachably or fixedly installed on the support plate; the positioning mechanism includes a positioning element and a connecting element, the connecting element is installed on the support plate, and the positioning element is movably installed on the connecting element to adjust the position of the positioning element.

[0021] This utility model provides a die-cutting device that, by setting grooves on a support plate, allows the die-cutting line to follow the preset grooves during battery electrode die-cutting. The first fixing area and the second fixing area on the inner and outer sides of the grooves can fix and support the battery electrode before and after cutting. The first fixing area fixes and supports the electrode body, while the second fixing area fixes the edge area and blank area of ​​the battery electrode material. This can avoid the shaking phenomenon of the battery electrode during the cutting process, ensure that the battery electrode does not shift during the cutting process, ensure the processing size, and meet the processing accuracy of the product process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a die-cutting device provided by this utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the supporting inner plate of the die-cutting device is shown.

[0025] Figure 3 for Figure 2 A perspective structural diagram of the supporting inner plate shown;

[0026] Figure 4 for Figure 2 A schematic diagram of the structure on the back of the supporting inner plate is shown.

[0027] Figure 5 for Figure 1 A schematic diagram of the supporting outer plate of the device shown;

[0028] Figure 6 for Figure 5 A perspective structural diagram of the supporting outer plate shown;

[0029] Figure 7 for Figure 1 The diagram shows the structural schematic of the support outer plate of the die-cutting device.

[0030] Figure 8 for Figure 1 The diagram shows the structural schematic of the positioning mechanism of the die-cutting device. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Please refer to Figures 1-8 , Figure 1 This is a schematic diagram of a die-cutting device provided by this utility model. This die-cutting device is applicable to the cutting process of battery electrodes for lithium-ion batteries, and is particularly suitable for laser die-cutting processes. It includes a support plate 1 and a positioning mechanism 2. Specifically, the support plate 1 has a flat surface for placing the battery electrode to be die-cut. The support plate 1 has a groove 3. The groove 3 is formed along the die-cutting line during battery electrode die-cutting, and the shape of the groove 3 is consistent with the die-cutting line. When the battery electrode is cut, the cutting seam produced by laser cutting or other cutting processes is located at this groove, allowing the debris and dust generated during cutting to fall into the groove 3. The two sides of the groove 3 divide the support surface of the support plate 1 into two areas: a first fixing area 11 and a second fixing area 12. The first fixing area 11 fixes and supports the main body of the battery electrode (i.e., a battery electrode obtained after cutting), and the second fixing area 12 fixes and supports the edge area and blank area of ​​the battery electrode. A positioning mechanism 2 is installed on the side of the support plate 1. The positioning mechanism 2 can limit the battery electrode placed on the support plate 1 to ensure the position of the battery electrode when it is loaded, so that the cutting is more accurate and the processing size meets the product process precision.

[0033] Before, after, and during the cutting process of the battery electrode sheet, the first fixing area 11 and the second fixing area 12 can support and fix the battery electrode sheet, thereby preventing the battery electrode sheet from shaking during the cutting process, ensuring that the battery electrode sheet does not shift during the cutting process, ensuring the processing dimensions, and meeting the processing accuracy of the product process.

[0034] A plurality of suction holes 4 are provided within the groove 3. These suction holes 4 are evenly distributed and connected to a suction pipe within the support plate 1, and also connected to a suction port 13 located on the support plate 1. The suction port 13 can be connected to an external suction device to remove dust and debris generated during the cutting process. Optionally, the width of the groove 3 is greater than the width of the kerf during battery electrode die-cutting, so that the dust and debris generated during cutting can easily fall off and be suctioned away. Preferably, the width of the groove 3 is 1-5 mm greater than the width of the kerf.

[0035] The die-cutting device provided by this utility model first loads the battery electrode onto the support plate 1, with the edge of the battery electrode abutting against the positioning mechanism 2. Then, the support plate 1 is used to adsorb and fix the battery electrode. The external vacuuming device is turned on, and then the cutting is performed. After the cutting is completed, the adsorption of the support plate 1 is stopped, and the battery electrode can be removed.

[0036] The support plate 1 can support and fix the battery electrode sheets through vacuum adsorption, electrostatic adsorption, snap-fit ​​positioning, or other fixing methods known to those skilled in the art. Preferably, vacuum adsorption is used for fixing. Specifically, one or more vacuum ports 14 are provided on the side or bottom surface of the support plate 1. The surfaces of the first fixing area 11 and the second fixing area 12 are provided with a plurality of vacuum holes 5. Vacuum pipes are provided inside the support plate 1, and the plurality of vacuum holes 5 are respectively connected to the vacuum pipes. The vacuum pipes are connected to the vacuum ports 14, so that a vacuum device is connected to the vacuum ports 14, which can create a negative pressure at the vacuum holes 5 to adsorb and fix the battery electrode sheets on the support plate 1. Optionally, the vacuum pipes of the first fixing area 11 and the second fixing area 12 are not connected to each other and are two vacuum pipes that can be independently controlled to open and close, so as to facilitate independent control of the two areas. For example, the vacuum ports 14 include a first port 141 and a second port 142. The first port 141 is used to connect to a plurality of vacuum holes 5 in the first fixing area 11, and the second port 142 is used to connect to a plurality of vacuum holes 5 in the second fixing area 12.

[0037] This utility model provides a die-cutting device, whose support plate 1 includes an inner support plate 100 and an outer support plate 200. The surface of the inner support plate 100 is the first fixing area 11, and the surface of the outer support plate 200 is the second fixing area 12. The first fixing area 11 and the second fixing area 12 are on the same plane, and the second fixing area 12 is arranged around the first fixing area 11. The gap between the inner support plate 100 and the outer support plate 200 is the groove 3. The inner support plate 100 and the outer support plate 200 can be a separate structure or a one-piece structure. The separate structure has the advantage of simple processing.

[0038] like Figures 2-7 The diagram shown is a schematic of the split structure.

[0039] In one specific embodiment, the second fixing area 12 of the outer support plate 200 is provided with a recess, forming a recessed space 201. The inner support plate 100 is embedded in the recessed space 201, so that the second fixing area 12 surrounds the first fixing area 11. The groove 3 is the gap between the outer support plate 200 and the inner support plate 100 after installation. To make the groove 3 more precise and the installation position of the inner support plate 100 more precise, a number of positioning posts 202 are provided in the recessed space 201. The inner support plate 100 is provided with corresponding positioning holes 101 to facilitate the positioning of the inner support plate 100 and the outer support plate 200 during installation. It is understood that these are not limited to positioning posts, but can also be other types of positioning or limiting structures, such as limiting holes, limiting blocks, limiting grooves, positioning pins, etc. After the inner support plate 100 is embedded in the outer support plate 200, it can be installed and fixed by fasteners in the preset fastener mounting holes 6.

[0040] In another specific embodiment, the inner support plate 100 and the outer support plate 200 are separate structures, and the outer support plate 200 is a ring structure. The outer support plate 200 surrounds the periphery of the inner support plate 100 so that the second fixing area 12 is arranged around the first fixing area 11, and the groove 3 is the gap between the outer support plate 200 and the inner support plate 100.

[0041] Optionally, the suction holes 4 can be evenly distributed around the bottom periphery of the recessed space 201. The suction inlet 13 is disposed on the supporting outer plate 200, and the supporting outer plate 200 has a suction duct network 203 inside, which connects the suction inlet 13 and several suction holes 4. For ease of processing and cleaning maintenance, the suction duct network 203 can be designed as a hole penetrating the supporting outer plate 200, with one hole serving as the suction inlet 13 and the other holes sealed off.

[0042] A plurality of vacuum holes 5 are evenly distributed in the first fixed area 11 and the second fixed area 12. Both the inner support plate 100 and the outer support plate 200 are equipped with an air extraction pipe network 7. A first interface 141 is located on the inner support plate 100, and a second interface 142 is located on the outer support plate 200. The first interface 141, the air extraction pipe network 7 of the inner support plate 100, and the plurality of vacuum holes 5 in the first fixed area 11 are connected. The second interface 142, the air extraction pipe network 7 of the outer support plate 200, and the plurality of vacuum holes 5 in the second fixed area 12 are connected. For ease of processing and cleaning maintenance, the air extraction pipe network 7 can be designed as a hole penetrating both the inner support plate 100 and the outer support plate 200, with one hole serving as either the first interface 141 or the second interface 142, and the other holes sealed.

[0043] Preferably, the diameter of the air extraction pipe network 7 is 4-6 mm to ensure overall airflow and strength; the diameter of the vacuum holes 5 is 1-2 mm, the distance between adjacent vacuum holes 5 is 10-20 mm, and the distance between the vacuum holes 5 on the outer side of the inner support plate 100 and the edge of the inner support plate 100 is 2-3 mm. This further ensures overall vacuum strength and reduces vibration of the sheet material during cutting. It is understood that these specific dimensional data are selected by those skilled in the art based on actual needs, and only a preferred embodiment is shown here.

[0044] In another specific embodiment, the inner support plate 100 and the outer support plate 200 can also have other structural shapes. For example, the surface shape of the inner support plate 100 is similar to the shape of the cut battery electrode sheet. The outer support plate 200 surrounds the periphery of the inner support plate 100, and the groove 3 is the gap between the outer support plate 200 and the inner support plate 100. The inner support plate 100 and the outer support plate 200 are connected by fasteners. For example, fasteners can pass through the groove 3 to fix the two together, or other connecting structures can be added to fix the inner support plate 100 and the outer support plate 200 together.

[0045] Optionally, a plurality of flow channels 8 are provided on the surface of the supporting outer plate 200. The flow channels 8 are disposed through the second fixing area 12. The flow channels 8 are offset from the vacuum holes 5. One end of the flow channels 8 is connected to the groove 3. The flow channels 8 are used to guide the gas in the groove 3 during die cutting, thereby avoiding the deformation of the battery electrode due to negative pressure during vacuum adsorption or dust collection.

[0046] like Figure 2As shown, the surface shape of the inner support plate 100 is similar to the shape of the cut battery electrode sheet. The inner support plate 100 includes a main body portion and a tab portion. The tab portion protrudes from the main body portion. The main body portion corresponds to the main body of the battery electrode sheet, and the tab portion corresponds to the tab of the battery electrode sheet. Optionally, the dimensions of both the main body portion and the tab portion are slightly smaller than the dimensions of the main body and the tab of the battery electrode sheet.

[0047] like Figure 8 As shown, the present invention provides a die-cutting device, whose positioning mechanism 2 includes a positioning member 21 and a connecting member 22. The connecting member 22 is detachably or fixedly installed on the side or back of the support plate 1 using fasteners, allowing the positioning member 21 to be movably installed on the support plate 1. Optionally, the positioning member 21 has a positioning surface whose shape matches the edge shape of the battery electrode sheet, for fitting the edge of the battery electrode sheet. When the battery electrode sheet is tightly against the positioning surface, the position of the battery electrode sheet is ensured to be as required for cutting. The connecting member 22 is provided with a limiting hole, in which the positioning member 21 is installed and can move within the limiting hole, and then fixed by fasteners. It should be understood that the number of positioning mechanisms 2 can be one or more, or other positioning structures, the purpose of which is to mark the positioning of the battery electrode sheets during battery electrode sheet loading.

[0048] The present invention provides a die-cutting device, which provides a groove 3 on a support plate 1 so that the die-cutting line follows the preset groove during the die-cutting of the battery electrode sheet. The first fixing area 11 and the second fixing area 12 on the inner and outer sides of the groove can fix and support the battery electrode sheet before and after cutting, thereby avoiding the shaking phenomenon of the battery electrode sheet during the cutting process, ensuring that the battery electrode sheet does not shift during the cutting process, ensuring the processing size, and meeting the processing accuracy of the product process.

[0049] The die-cutting device provided by this utility model has a support plate 1 made of 6061 aluminum alloy with a hard anodized surface. It has a simple structure and is easy to operate. In actual use, it has been found to have the following advantages: it can effectively reduce the workload of employees and reduce the adjustment actions of employees when positioning products; it can improve the work efficiency of employees by more than 20%, eliminate the influence of smoke and dust, and improve work comfort; the good thermal conductivity of aluminum alloy can also improve the cutting effect and reduce the heat-affected zone of cutting.

[0050] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A die-cutting apparatus for die-cutting battery electrodes, characterized in that, include: A support plate is provided for placing the battery electrode sheet to be die-cut. The support plate has a groove whose shape corresponds to the die-cutting line during battery electrode sheet die-cutting. The groove divides the support plate into a first fixing area and a second fixing area. Before and after die-cutting, both the first and second fixing areas are used to fix and support the battery electrode sheet. The groove contains several suction holes, which communicate with a suction interface located on the support plate. A positioning mechanism, mounted on the support plate, is used to limit the position of the battery electrode. The width of the groove is greater than the cutting width during the die-cutting of the battery electrode.

2. The die-cutting apparatus according to claim 1, characterized in that, The support plate is provided with one or more air extraction ports. The surfaces of the first fixed area and the second fixed area are each provided with a number of vacuum holes. The number of vacuum holes converge inside the support plate and are connected to the air extraction ports.

3. The die-cutting apparatus according to claim 2, characterized in that, The vacuum port includes a first port and a second port. The first port is used to connect to a plurality of vacuum holes in the first fixed area, and the second port is used to connect to a plurality of vacuum holes in the second fixed area.

4. The die-cutting apparatus according to claim 3, characterized in that, The support plate includes an inner support plate and an outer support plate. The surface of the inner support plate is the first fixing area, and the surface of the outer support plate is the second fixing area. The second fixing area is arranged around the first fixing area, and the first fixing area and the second fixing area are on the same plane.

5. The die-cutting apparatus according to claim 4, characterized in that, The inner support plate and the outer support plate are separate structures. The outer support plate has a recessed space, and the inner support plate is embedded in the recessed space so that the second fixing area surrounds the first fixing area. The groove is the gap between the outer support plate and the inner support plate; or... The inner support plate and the outer support plate are separate structures. The outer support plate is a ring-shaped structure, surrounding the periphery of the inner support plate so that the second fixing area surrounds the first fixing area. The groove is the gap between the outer support plate and the inner support plate; or... The inner support plate and the outer support plate are an integral structure.

6. The die-cutting apparatus according to claim 5, characterized in that, The inner support plate and the outer support plate are fixedly connected by fasteners; The recessed space is provided with several positioning posts, and the inner support plate is provided with corresponding positioning holes to facilitate the positioning of the inner support plate and the outer support plate during installation.

7. The die-cutting apparatus according to claim 5, characterized in that, A plurality of suction holes are provided on the bottom periphery of the recessed space, the suction port is provided on the outer support plate, and a suction pipe network is provided inside the outer support plate, the suction pipe network connecting the suction port and the plurality of suction holes; A plurality of vacuum holes are evenly arranged in the first fixed area and the second fixed area respectively. The inner support plate and the outer support plate are both provided with a vacuum pipe network. The first interface is provided on the inner support plate and the second interface is provided on the outer support plate. The first interface is connected to the plurality of vacuum holes in the first fixed area through the vacuum pipe network of the inner support plate, and the second interface is connected to the plurality of vacuum holes in the second fixed area through the vacuum pipe network of the outer support plate.

8. The die-cutting apparatus according to claim 4, characterized in that, The outer support plate is provided with a plurality of flow guide grooves, which are disposed through the second fixed area and offset from the vacuum hole, for guiding the gas in the grooves during die cutting.

9. The die-cutting apparatus according to claim 4, characterized in that, The surface shape of the inner support plate is similar to the shape of the cut battery electrode. The inner support plate includes a main body and an electrode tab protruding from the main body. The main body corresponds to the main body of the electrode and the electrode tab corresponds to the electrode tab of the electrode.

10. The die-cutting apparatus according to any one of claims 1-9, characterized in that, The positioning mechanism is detachably or fixedly installed on the support plate; the positioning mechanism includes a positioning component and a connecting component, the connecting component is installed on the support plate, and the positioning component is movably installed on the connecting component to adjust the position of the positioning component.

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