A presser, a presser mechanism and a lamination machine

Abstract

The utility model belongs to the field of lamination equipment, especially relate to a press knife, press knife mechanism and laminating machine, connect fixed section and press section in sequence along first direction, the press section has first plane and second plane opposite setting along second direction, along the direction away from fixed section, the distance of first plane and second plane gradually reduces, the included angle of first plane and second plane is 2.5 degree 3.5 degree, and the minimum value of first plane and second plane distance is 0.25mm 0.35mm, first direction and second direction are perpendicular. The utility model can reduce the occurrence of the bending deformation phenomenon of pole piece caused by press knife.

Description

Technical Field

[0001] This utility model belongs to the field of stacking equipment, and particularly relates to a pressing knife, a pressing knife mechanism and a stacking machine. Background Technology

[0002] The existing pressing blades are relatively thick. During the stacking process, the suction plate of the stacking machine is performing a pressing action, and the blade pulling action performed by the pressing blade can easily cause large stress deformation to the separator and electrode, which can easily lead to electrode bending. Summary of the Invention

[0003] The technical problem to be solved by this utility model is: to address the issue that the existing pressing blades are too thick and easily cause large stress deformation to the electrode sheets during the stacking process, and to provide a pressing blade, a pressing blade mechanism, and a stacking machine.

[0004] To address the aforementioned problems, one embodiment of this utility model provides a pressing knife, comprising a fixed section and a pressing section connected sequentially along a first direction; The pressing section has a first plane and a second plane arranged opposite to each other along a second direction. Along the direction away from the fixing section, the distance between the first plane and the second plane gradually decreases. The included angle between the first plane and the second plane is 2.5°-3.5°, and the minimum distance between the first plane and the second plane is 0.25mm-0.35mm. The first direction and the second direction are perpendicular.

[0005] Optionally, the angle between the first plane and the second plane is 2.8°-3.2°, and the minimum distance between the first plane and the second plane is 0.28mm-0.32mm.

[0006] Optionally, the fixing segment has a third plane and a fourth plane arranged opposite to each other along the second direction, the third plane and the fourth plane are parallel, and the fourth plane and the second plane are coplanar; a transition arc surface is provided between the first plane and the third plane, and the distance between the transition arc surface and the fourth plane gradually decreases from the fixing segment to the pressing segment.

[0007] Optionally, the transition arc surface is a circular arc surface, and the center of the transition arc surface is located on the side of the transition arc surface away from the fixed segment.

[0008] Optionally, the edges of the pressing sections are all rounded.

[0009] Optionally, along the direction close to the pressing segment, the length of the fixing segment along the third direction is first constant and then decreases until the length of the fixing segment along the third direction is the same as the length of the pressing segment along the third direction.

[0010] Optionally, the flatness of the pressing section is 0.01mm-0.03mm.

[0011] Optionally, the fixing section and the pressing section are integrally formed.

[0012] On the other hand, this utility model embodiment provides a pressing mechanism, including a power mechanism and two pressing blades as described above. The pressing sections of the two pressing blades are arranged opposite to each other. Each pressing blade is connected to the power mechanism, and the power mechanism is used to drive the pressing blade to move.

[0013] On the other hand, this utility model embodiment provides a stacking machine, characterized in that it includes a machine body and the above-mentioned pressing mechanism, wherein the pressing mechanism is connected to the machine body.

[0014] The present invention provides a pressing knife, a pressing knife mechanism, and a stacking machine. The thickness of the pressing knife is reduced to 0.25mm-0.35mm, and the angle between the first plane and the second plane is reduced to 2.5°-3.5°. When the suction plate presses the electrode sheet and the pressing knife is ready to be pulled out, the thinner pressing knife and the reduced tilt angle at this time will not cause the pressed electrode sheet to bend significantly, thus ensuring the rigidity of the stacking pressing knife while ensuring that the electrode sheet is not damaged. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.

[0016] Figure 1 This is an overall schematic diagram of the pressing knife provided in one embodiment of the present invention; Figure 2 This is a side view of a pressing knife provided in one embodiment of the present invention.

[0017] The reference numerals in the accompanying drawings are as follows: 1. Pressing blade; 11. Pressing section; 12. Fixing section; 13. First plane; 14. Second plane; 15. Third plane; 16. Fourth plane; 17. Transition arc surface; 18. Mounting hole. Detailed Implementation

[0018] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 and Figure 2 As shown, one embodiment of this utility model provides a pressing knife, including a fixed section 12 and a pressing section 11 connected sequentially along a first direction; the pressing section 11 has a first plane 13 and a second plane 14 arranged opposite each other along a second direction. Along the direction away from the fixed section 12, the distance between the first plane 13 and the second plane 14 gradually decreases, the included angle between the first plane 13 and the second plane 14 is α, where α is 2.5°-3.5°, and the minimum distance between the first plane 13 and the second plane 14 is 0.25mm-0.35mm; the first direction and the second direction are perpendicular. The first direction is the length direction of the pressing knife 1, and the second direction is the thickness direction of the pressing knife 1.

[0022] In one embodiment, the thickness of the pressing blade 1 is reduced to 0.25mm-0.35mm. If the thickness of the pressing section is too thin, the rigidity of the pressing blade contact end will be insufficient. If the thickness of the pressing section is too thick, the separator and electrode sheet will easily deform during the stacking process. The angle between the first plane 13 and the second plane 14 is reduced to 2.5°-3.5°. When the suction plate presses the electrode sheet and the pressing blade 1 is ready to be pulled out, the thinner pressing blade 1 and the reduced tilt angle will prevent the pressed electrode sheet from bending significantly. This ensures the rigidity of the stacking pressing blade 1 while preventing damage to the electrode sheet. If the angle between the first plane 13 and the second plane 14 is too small, the rigidity of the pressing blade contact end will be insufficient. If the angle between the first plane 13 and the second plane 14 is too large, the separator and electrode sheet will easily deform during the stacking process.

[0023] Specifically, in this embodiment, the length of the pressing knife 1 along the first direction is 22mm. This pressing knife 1 is suitable for small battery cells with an electrode length of less than 20mm and a width of less than 10mm. The angle between the first plane 13 and the second plane 14 is 2.8°-3.2°, and the minimum distance between the first plane 13 and the second plane 14 is 0.28mm-0.32mm.

[0024] In one embodiment, the fixing segment 12 has a third plane 15 and a fourth plane 16 arranged opposite to each other along a second direction. The third plane 15 and the fourth plane 16 are parallel, and the fourth plane 16 is coplanar with the second plane 14. A transition arc surface 17 is provided between the first plane 13 and the third plane 15. From the fixing segment 12 to the pressing segment 11, the distance between the transition arc surface 17 and the fourth plane 16 gradually decreases. In this embodiment, the fixing segment 12 is provided with a plurality of mounting holes 18. The mounting holes 18 are strip-shaped, with their length direction parallel to the first direction, their depth direction parallel to the second direction, and their width direction parallel to the width direction of the pressing knife 1. Specifically, the transition arc surface 17 is a circular arc surface, and the center of the transition arc surface 17 is located on the side of the transition arc surface 17 away from the fixing segment 12.

[0025] In this embodiment, the pressure knife 1 is connected to other components of the pressure knife mechanism through the mounting hole 18. The bottom surface of the pressure knife 1 (the plane where the fourth plane 16 and the second plane 14 are located) is flush, which facilitates processing and manufacturing. The first plane 13 is an inclined plane, which is easier to process than an arc-shaped plane.

[0026] In one embodiment, the edges of the pressing section 11 are all rounded. Each edge of the pressing section 11 in this embodiment is manufactured using a smooth rounding process, which reduces friction and wear on the electrode sheet during the cutting process.

[0027] In one embodiment, along the direction close to the pressing section 11, the length of the fixing section 12 in the third direction is first constant and then gradually decreases until the length of the fixing section 12 in the third direction is the same as the length of the pressing section 11 in the third direction, where the third direction is the width direction of the pressing blade 1. In this embodiment, since the electrode of the applicable battery cell is small, there is no need for a pressing blade 1 with an excessively large width. Therefore, the width of the pressing section 11 is relatively narrow to facilitate pressing the electrode. However, the width of the fixing section 12 does not need to be too narrow, otherwise it would be difficult to connect with other components of the pressing blade mechanism.

[0028] In one embodiment, the flatness of the pressing section 11 is 0.01mm-0.03mm. In this embodiment, the pressing section 11 is in direct contact with the electrode. If the flatness is too small (0.01-0.03mm), the processing will be difficult. If the flatness is too large, the partition and electrode will be subjected to uneven force during stacking, which may cause the stack to tilt.

[0029] In one embodiment, the fixing section 12 and the pressing section 11 are integrally formed, and the flatness of the pressing section 11 is the same as that of the fixing section 12. Since the fixing section 12 and the pressing section 11 are integrally formed, the flatness of the pressing section 11 and the fixing section 12 is generally made consistent during the processing, avoiding the need for the personnel manufacturing the pressing knife 1 to distinguish the boundary line between the pressing section 11 and the fixing section 12, thereby facilitating manufacturing.

[0030] In addition, this embodiment of the invention provides a pressing mechanism, including a power mechanism and two pressing blades 1 as described above. The pressing sections 11 of the two pressing blades 1 are arranged opposite to each other. Each pressing blade 1 is connected to the power mechanism, which drives the pressing blade 1 to move. In this embodiment, the pressing mechanism is similar to that in the prior art, typically having two pressing blades 1 arranged opposite to each other.

[0031] In addition, this utility model embodiment provides a stacking machine, including a machine body and the above-mentioned pressing mechanism, the pressing mechanism being connected to the machine body.

[0032] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A pressing knife (1), characterized in that, It includes a fixed section (12) and a pressing section (11) connected sequentially along the first direction; The pressing section (11) has a first plane (13) and a second plane (14) arranged opposite to each other along a second direction. Along the direction away from the fixing section (12), the distance between the first plane (13) and the second plane (14) gradually decreases. The included angle between the first plane (13) and the second plane (14) is 2.5°-3.5°, and the minimum distance between the first plane (13) and the second plane (14) is 0.25mm-0.35mm. The first direction and the second direction are perpendicular.

2. The pressing knife according to claim 1, characterized in that, The included angle between the first plane (13) and the second plane (14) is 2.8°-3.2°, and the minimum distance between the first plane (13) and the second plane (14) is 0.28mm-0.32mm.

3. The pressing knife according to claim 1, characterized in that, The fixed segment (12) has a third plane (15) and a fourth plane (16) arranged opposite to each other along a second direction. The third plane (15) and the fourth plane (16) are parallel, and the fourth plane (16) and the second plane (14) are coplanar. A transition arc surface (17) is provided between the first plane (13) and the third plane (15). The distance between the transition arc surface (17) and the fourth plane (16) gradually decreases from the fixed segment (12) to the pressing segment (11).

4. The pressing knife according to claim 3, characterized in that, The transition arc surface (17) is a circular arc surface, and the center of the transition arc surface (17) is located on the side of the transition arc surface (17) away from the fixed segment (12).

5. The pressing knife according to claim 1, characterized in that, The edges of the pressing section (11) are all rounded.

6. The pressing knife according to claim 1, characterized in that, Along the direction close to the pressing section (11), the length of the fixing section (12) along the third direction is first constant and then decreases until the length of the fixing section (12) along the third direction is the same as the length of the pressing section (11) along the third direction, and the third direction, the first direction and the second direction are perpendicular to each other.

7. The pressing knife according to claim 1, characterized in that, The flatness of the pressing section (11) is 0.01mm-0.03mm.

8. The pressing knife according to claim 1, characterized in that, The fixing section (12) and the pressing section (11) are integrally formed.

9. A knife-pressing mechanism, characterized in that, It includes a power mechanism and two pressing knives as described in any one of claims 1 to 8, wherein the pressing sections (11) of the two pressing knives (1) are arranged opposite to each other, and each pressing knive (1) is connected to the power mechanism, which is used to drive the pressing knives (1) to move.

10. A stacking machine, characterized in that, It includes a body and a pressing mechanism as described in any one of claims 9, wherein the pressing mechanism is connected to the body.

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