Intermittent embossing device for pole piece and pole piece

Abstract

The utility model provides a pole piece intermittent knurling device and pole piece, the pole piece intermittent knurling device comprises a mounting base, a rubber roller and a knurling roller assembly, the rubber roller and the knurling roller assembly are both installed on the mounting base, the knurling roller assembly comprises a knurling roller, a first driving piece and a second driving piece, the knurling roller and the rubber roller are arranged in parallel, and the first driving piece and the second driving piece are arranged in parallel. The second driving part is used for intermittently driving the first driving part and the knurling roller to move in the first direction, so that the first driving part and the knurling roller move close to or away from the rubber roller, and the first driving part is connected with the knurling roller and used for adjusting the pressure applied to the pole piece by the knurling roller. According to the utility model, the embossing depth of the embossing can be adjusted, so that wrinkles generated on the surface of a pole piece can be reduced, and the quality of a battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a pole piece intermittent embossing device and a pole piece. Background Art

[0002] As the demand for battery energy density continues to increase, the pole pieces are becoming thinner and thinner. When the pole pieces (including positive and negative pole pieces) and separators are wound or stacked to form a battery cell, the pole pieces are easily deformed under tension after being compacted under a certain pressure, making the pole piece surface inside the battery cell uneven, prone to wrinkles, resulting in black spots, and poor alignment of the tabs, seriously affecting the quality of the battery cell. Embossing the pole pieces can effectively alleviate this wrinkling phenomenon.

[0003] However, the existing embossing device cannot adjust the embossing depth, resulting in embossing differences, and cannot effectively improve the wrinkling phenomenon of the electrode. It may also destroy the material on the electrode and damage the electrode. Utility Model Content

[0004] The utility model aims to solve the defects of the prior art and provide an intermittent embossing device for pole pieces, which can adjust the embossing depth, thereby helping to reduce wrinkles on the pole piece surface and improve the quality of the battery cell.

[0005] In order to solve the above problems, the first aspect of the present invention provides a pole piece intermittent embossing device, comprising:

[0006] Mounting seat;

[0007] A rubber roller, the rubber roller being mounted on the mounting seat;

[0008] an embossing roller assembly, the embossing roller assembly being mounted on the mounting seat and comprising an embossing roller, a first driving member, and a second driving member. The embossing roller is arranged parallel to the rubber roller, the second driving member being used to intermittently drive the first driving member and the embossing roller to move along a first direction, so that the first driving member and the embossing roller move closer to or away from the rubber roller. The first driving member is connected to the embossing roller and is used to adjust the pressure applied by the embossing roller to the electrode sheet.

[0009] The first driving member is a cylinder, and the second driving member is a motor.

[0010] Furthermore, the embossing roller assembly also includes a embossing roller bracket and a connecting seat, the embossing roller is installed on the embossing roller bracket, one end of the first driving member is connected to the connecting seat, the other end of the first driving member is connected to the embossing roller bracket, the second driving member is connected to the connecting seat, and the second driving member is used to drive the connecting seat to move along the first direction.

[0011] Furthermore, the embossing roller assembly also includes a screw and a screw seat, the screw seat is fixedly connected to the connecting seat, one end of the screw is connected to the screw seat, and the other end of the screw is connected to the second driving member.

[0012] Furthermore, the embossing roller assembly further comprises a pressure sensor, which is disposed between the first driving member and the embossing roller, and is used to detect the pressure applied by the embossing roller to the pole piece.

[0013] Furthermore, it also includes a pressure digital display meter, which is connected to the pressure sensor and is used to measure the pressure applied by the embossing roller to the electrode.

[0014] Furthermore, it also includes an electric proportional valve, and the first driving component is connected to the electric proportional valve.

[0015] Furthermore, it also includes at least one limit column, which is installed on the mounting seat, the limit column extends along the first direction, and the limit column passes through the mounting seat and is connected to the pressure roller bracket, and a limit block is provided at one end of the limit column away from the pressure roller bracket.

[0016] Furthermore, a plurality of embossing protrusions are evenly arranged on the surface of the embossing roller.

[0017] The second aspect of the present invention provides a pole piece, which is embossed on the surface of the pole piece using the pole piece intermittent embossing device as described in the first aspect, and the embossing intervals are arranged on the surface of the pole piece along the length direction of the pole piece.

[0018] The intermittent embossing device and pole piece of the utility model are provided with a first driving member and a second driving member. The second driving member can intermittently drive the first driving member and the embossing roller to move simultaneously in the vertical direction, so that the first driving member and the embossing roller move close to or away from the rubber roller, so as to adjust the distance between the embossing roller and the rubber roller, and make the embossing roller roll the pole piece to form a pattern on the pole piece. By providing the first driving member between the second driving member and the embossing roller, the first driving member can play a buffering role to avoid the rigid pressure between the embossing roller and the rubber roller. The first driving member can fine-tune the pressure applied by the embossing roller to the pole piece. By driving the embossing roller in cooperation with the first driving member and the second driving member, the pressure applied by the embossing roller to the pole piece can be accurately adjusted. In this way, the embossing depth on the electrode can be better adjusted, which not only avoids the embossing being too shallow, which makes it impossible to release the tension of the electrode well, and the effect of improving the wrinkling of the electrode is not significant, but also avoids the embossing being too deep, which damages the electrode, forms a bad battery cell, and affects the qualified rate of the battery cell. In addition, the first driving member adopts a cylinder, which has no hysteresis and can timely adjust the pressure applied by the embossing roller to the electrode, thereby timely adjusting the embossing depth on the electrode. The space occupied by the cylinder is small, which is conducive to reducing the volume of the intermittent embossing device of the electrode. The second driving member adopts a motor, which not only has high adjustment accuracy and good repeatability, but also can control the pressure according to the torque mode of the motor, which is conducive to improving the consistency of the electrode embossing during the intermittent embossing process. In this embodiment, by reasonably arranging the various components and the connection relationship between the various components, the space volume occupied by the intermittent embossing device of the electrode can be reduced, and the various components are compactly arranged, and the action and timing settings between the various components are more reasonable, which is conducive to improving the production efficiency of the intermittent embossing of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front structural schematic diagram of the electrode intermittent embossing device provided in an embodiment of the present utility model;

[0020] Figure 2 This is a side structural schematic diagram of the electrode intermittent embossing device provided in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the pole piece provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot 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 one or more of the said features. In addition, in the description of the present invention, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this invention based on the specific circumstances.

[0024] In this specification, the term "as an alternative embodiment" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one alternative embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0025] Combine Figure 1 and Figure 2 As shown, the first aspect of this embodiment provides an intermittent embossing device for a pole piece, comprising: a mounting base 10, a rubber roller 20 and an embossing roller assembly, wherein the rubber roller 20 and the embossing roller assembly are both mounted on the mounting base 10, wherein:

[0026] The embossing roller assembly includes an embossing roller 31, a first driving member 32 and a second driving member 33. The embossing roller 31 and the rubber roller 20 are arranged in parallel. The second driving member 33 is used to intermittently drive the first driving member 32 and the embossing roller 31 along the vertical direction (i.e., the first direction, Figure 1 The first driving member 32 and the embossing roller 31 move closer to or away from the rubber roller 20. The first driving member 32 is connected to the embossing roller 31. The first driving member 32 is used to adjust the pressure applied by the embossing roller 31 to the pole piece 100. The first driving member 32 is a cylinder and the second driving member 33 is a motor.

[0027] The intermittent embossing device for the electrode in this embodiment is configured with a first driving member and a second driving member. The second driving member can intermittently drive the first driving member and the embossing roller to move simultaneously in the vertical direction, so that the first driving member and the embossing roller move closer to or away from the rubber roller, so as to adjust the distance between the embossing roller and the rubber roller, and enable the embossing roller to roll the electrode to form a pattern on the electrode. By configuring the first driving member between the second driving member and the embossing roller, the first driving member can play a buffering role to avoid the rigid pressure between the embossing roller and the rubber roller. The first driving member can fine-tune the pressure applied by the embossing roller to the electrode. By driving the embossing roller in cooperation with the first driving member and the second driving member, the pressure applied by the embossing roller to the electrode can be accurately adjusted, thereby Better adjustment of the embossing depth on the electrode can not only avoid the embossing being too shallow, which makes it impossible to release the tension of the electrode well and improve the electrode wrinkling phenomenon insignificantly, but also avoid the embossing being too deep, which damages the electrode, forms a bad battery cell, and affects the qualified rate of the battery cell. In addition, the first driving member adopts a cylinder, which has no hysteresis and can timely adjust the pressure applied by the embossing roller to the electrode, thereby timely adjusting the embossing depth on the electrode. The space occupied by the cylinder is small, which is conducive to reducing the volume of the intermittent embossing device of the electrode. The second driving member adopts a motor, which not only has high adjustment accuracy and good repeatability, but also can control the pressure according to the torque mode of the motor, which is conducive to improving the consistency of the electrode embossing during the intermittent embossing process. In this embodiment, by reasonably arranging the various components and the connection relationship between the various components, the space volume occupied by the electrode intermittent embossing device can be reduced, and the various components are compactly arranged, and the action and timing settings between the various components are more reasonable, which is conducive to improving the production efficiency of the intermittent embossing of the electrode.

[0028] Based on the above embodiment, as an optional embodiment, the embossing roller assembly further includes a embossing roller bracket 34 and a connecting seat 35. The embossing roller 31 is mounted on the embossing roller bracket 34. The first driving member 32 is connected to the embossing roller bracket 34. The other end of the first driving member 32 is fixedly connected to the connecting seat 35. The second driving member 33 is connected to the connecting seat 35, and the second driving member 33 is used to drive the connecting seat 35 to move in a vertical direction. Thus, the embossing roller 31, the embossing roller bracket 34, the first driving member 32, and the connecting seat 35 are connected to form a whole. The second driving member 33 can drive the whole to move in a vertical direction, so that the embossing roller 31 approaches or moves away from the rubber roller 20, and the embossing roller 31 rolls the electrode 100.

[0029] Based on the above embodiment, as an optional implementation, the embossing roller assembly further includes a screw rod 36 and a screw rod seat (not shown in the figure), the screw rod seat is fixedly connected to the connecting seat 35, one end of the screw rod 36 is connected to the screw rod seat, and the other end of the screw rod 36 is connected to the second driving member 33. As a result, the second driving member 33 drives the connecting seat 35 to move in the vertical direction through the screw rod 36, thereby driving the embossing roller 31, the embossing roller bracket 34 and the first driving member 32 to move in the vertical direction. Through the second driving member 33 and the screw rod 36, intermittent embossing can be achieved, and the pressure value and the embossing depth can be better adjusted.

[0030] Based on the above embodiment, as an optional implementation, the embossing roller assembly further includes a pressure sensor 37. The pressure sensor 37 is disposed between the first driving member 32 and the embossing roller 31. The pressure sensor 37 is used to detect the pressure applied by the embossing roller 31 to the pole piece 100. In this embodiment, the specific location of the pressure sensor 37 is not further limited. Those skilled in the art can configure it according to actual conditions. For example, the pressure sensor 37 can be disposed on the embossing roller bracket 34.

[0031] Based on the above embodiment, as an optional implementation, the electrode intermittent embossing device further includes a pressure digital display 40, which is connected to the pressure sensor 37 and is used to display the pressure applied by the embossing roller 31 to the electrode 100. Therefore, by providing the pressure sensor 37 and the pressure digital display 40, the pressure applied by the embossing roller 31 to the electrode 100 can be monitored in real time, thereby accurately adjusting the pressure applied by the embossing roller 31 to the electrode 100.

[0032] Based on the above embodiment, as an optional implementation, the electrode intermittent embossing device further includes an electric proportional valve 50, which is connected to the first driving member 32. Thus, the electric proportional valve 50 can accurately control the driving pressure of the first driving member 32, thereby accurately adjusting the pressure applied by the embossing roller 31 to the electrode 100, thereby adjusting the embossing depth on the electrode 100.

[0033] On the basis of the above embodiment, as an optional implementation, the electrode intermittent embossing device further includes at least one limiting column 60, which is mounted on the mounting base 10, extending in the vertical direction, and passing through the mounting base 10 to connect with the pressure roller bracket 34. A limiting block (not shown in the figure) is provided at one end of the limiting column 60 away from the pressure roller bracket 34. Thus, the limiting column 60 can guide the pressure roller bracket 34 and the pressure roller 31 when they move, ensuring the stability of the pressure roller bracket 34 and the pressure roller 31 in the vertical direction. The limiting block can limit the distance that the pressure roller bracket 34 and the pressure roller 31 move in the vertical direction, thereby reducing the risk of overpressure on the electrode 100. As an optional implementation, two limiting columns 60 are provided to further improve the stability of the pressure roller bracket 34 and the pressure roller 31 in the vertical direction.

[0034] Based on the above embodiment, as an optional implementation, a plurality of embossing protrusions are evenly arranged on the surface of the embossing roller 31. Thus, when the embossing roller 31 presses the electrode sheet 100, embossing can be formed on the surface of the electrode sheet 100, thereby preventing the electrode sheet 100 from wrinkling.

[0035] Combine Figure 3 As shown, the second aspect of this embodiment provides a pole piece, which adopts the pole piece intermittent embossing device described in the first aspect to emboss the surface of the pole piece 100. Along the length direction of the pole piece 100, the embossing 110 is arranged at intervals on the surface of the pole piece 100, and a non-embossed section 120 is provided between any two adjacent embossings 110. Therefore, the pole piece 100 adopts the above structure, which can not only better improve the wrinkling phenomenon of the pole piece 100, but also avoid damage to the pole piece 100. In addition, the pole piece 100 with this structure can avoid the rounded corner range of the piezoelectric core, which is beneficial to improving the performance of the battery core.

[0036] In this embodiment, the length of each embossed section 110 is a first preset length, and the length of each non-embossed section 120 is a second preset length. In this embodiment, the specific numerical ranges of the first preset length and the second preset length are not further limited, and those skilled in the art can set them according to actual conditions.

[0037] The following combination Figures 1 to 3 The working principle of the electrode intermittent embossing device of this embodiment is described as follows:

[0038] The electrode 100 passes through the gap between the embossing roller 31 and the rubber roller 20, and the second driving member 33 drives the connecting seat 35 to move downward in the vertical direction. At this time, the embossing roller 31, the pressing roller bracket 34 and the first driving member 32 move downward in the vertical direction along with the connecting seat 35. The embossing roller 31 is close to the rubber roller 20, and the embossing roller 31 rolls the electrode 100. At the same time, according to the pressure value on the pressure digital display 40, the electric proportional valve 50 accurately adjusts the pressure driven by the first driving member 32 to accurately adjust the pressure applied by the embossing roller 31 to the electrode 100, and the embossing depth on the electrode 100 is controlled within an appropriate range. The embossing roller 31 moves along the conveying direction of the electrode 100 ( Figure 2 After rolling the first preset length (in the y direction in the figure), the second driving member 33 drives the connecting seat 35 to move upward in the vertical direction. At this time, the embossing roller 31 moves away from the rubber roller 20. After the electrode 100 is conveyed for the second preset length, the second driving member 33 drives the connecting seat 35 to move downward in the vertical direction, so that the embossing roller 31 is close to the rubber roller 20, and the above operation is repeated to form embossings arranged at intervals on the surface of the electrode 100.

[0039] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present utility model.

Claims

1. A pole piece intermittent embossing device, characterized in that: include: Mounting seat; A rubber roller, the rubber roller being mounted on the mounting seat; an embossing roller assembly, the embossing roller assembly being mounted on the mounting seat and comprising an embossing roller, a first driving member, and a second driving member. The embossing roller is arranged parallel to the rubber roller, the second driving member being used to intermittently drive the first driving member and the embossing roller to move along a first direction, so that the first driving member and the embossing roller move closer to or away from the rubber roller. The first driving member is connected to the embossing roller and is used to adjust the pressure applied by the embossing roller to the electrode sheet. The first driving member is a cylinder, and the second driving member is a motor.

2. The electrode intermittent embossing device according to claim 1, characterized in that: The embossing roller assembly also includes a embossing roller bracket and a connecting seat. The embossing roller is installed on the embossing roller bracket. One end of the first driving member is connected to the connecting seat, and the other end of the first driving member is connected to the embossing roller bracket. The second driving member is connected to the connecting seat, and the second driving member is used to drive the connecting seat to move along the first direction.

3. The electrode intermittent embossing device according to claim 2, characterized in that: The embossing roller assembly further includes a screw and a screw seat. The screw seat is fixedly connected to the connecting seat. One end of the screw is connected to the screw seat, and the other end of the screw is connected to the second driving member.

4. The electrode intermittent embossing device according to claim 1, characterized in that: The embossing roller assembly further includes a pressure sensor, which is disposed between the first driving member and the embossing roller and is used to detect the pressure applied by the embossing roller to the pole piece.

5. The electrode intermittent embossing device according to claim 4, characterized in that: It also includes a pressure digital display meter, which is connected to the pressure sensor and is used to measure the pressure applied by the embossing roller to the pole piece.

6. The electrode intermittent embossing device according to claim 1, characterized in that: It also includes an electric proportional valve, and the first driving member is connected to the electric proportional valve.

7. The electrode intermittent embossing device according to claim 2, characterized in that: It also includes at least one limiting column, which is installed on the mounting seat, the limiting column extends along the first direction, and the limiting column passes through the mounting seat and is connected to the pressure roller bracket, and a limiting block is provided at one end of the limiting column away from the pressure roller bracket.

8. The electrode intermittent embossing device according to claim 1, characterized in that: A plurality of embossing protrusions are evenly arranged on the surface of the embossing roller.

9. A pole piece, characterized in that: The surface of the pole piece is embossed using the pole piece intermittent embossing device according to any one of claims 1 to 8, and the embossing intervals are arranged on the surface of the pole piece along the length direction of the pole piece.

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