Laser scribing machine for pole piece production

Abstract

A laser scribing machine for pole piece production comprises a dust removal mechanism used for treating dust generated on a pole piece in the pole piece laser scribing process; the pole piece conduction mechanism is arranged in the dust removal mechanism and is used for transmitting pole pieces arranged on the pole piece conduction mechanism; and the laser emitting mechanism is arranged outside the dust removal mechanism, moves in the length direction and the height direction of the dust removal mechanism and is used for emitting laser to perform laser scribing on the pole piece arranged on the pole piece conduction mechanism. Compared with the prior art, by changing the horizontal position and the distance between the laser emitting mechanism and the dust removal mechanism, laser emitted by the laser emitting mechanism can generate laser scribing lines with different depths at different positions of the surface of the pole piece, so that the position requirements and the depth requirements of different pole piece products on the laser scribing lines are met; and meanwhile, the dust removal mechanism treats dust generated by laser scribing, so that the dust generated by laser scribing is separated from the surface of the pole piece, and the production quality of subsequent products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece processing, in particular to a laser scribing machine for pole piece production. Background Art

[0002] The general manufacturing process of lithium batteries includes: positive and negative electrode slurrying, coating, rolling, slitting, scribing, winding, shelling and liquid injection, formation and capacity separation. Among them, the scribing process can increase the electrolyte infiltration effect and speed, reduce the pore tortuosity of the electrode, improve the effective lithium ion diffusion coefficient, and form grooves to store electrolyte. At the same time, it helps lithium ions to diffuse quickly in thick electrodes, reducing the optimization of the negative electrode under high current charging conditions, thereby improving the battery cycle retention rate, reducing the battery internal resistance, effectively inhibiting negative electrode lithium plating, and significantly improving the battery's cycle performance under fast charging conditions. Dust will be generated during the laser scribing process. If the dust adheres to the electrode coil and flows into the subsequent process, it can easily pierce the diaphragm paper in the battery cell, causing a micro-short circuit in the battery, affecting the quality of subsequent battery products.

[0003] To address the above issues, Chinese patent application number 202321140005.5 discloses a dust removal device and electrode cutting equipment for laser cutting. These devices isolate the smoke and dust generated by laser cutting from the outside through a protective device. Furthermore, a dust suction device connected to a dust removal port and an air knife are used to remove the internal smoke and dust, preventing it from accumulating and entraining or scratching the electrode. When laser cutting the electrode, this device and electrode cutting equipment have a single cutting point and cannot meet the position and depth requirements for laser cutting of electrode pieces of different sizes. Utility Model Content

[0004] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a laser marking machine for pole piece production, which changes the horizontal position and distance of the laser acting on the pole piece surface when laser marking the pole piece, so that lines of different horizontal positions and depths are formed on the pole piece surface.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a laser marking machine for electrode production, including a dust removal mechanism for processing the dust generated on the electrode during the laser marking process of the electrode; a electrode conduction mechanism, arranged inside the dust removal mechanism, for transmitting the electrode arranged on the electrode conduction mechanism; a laser emitting mechanism, arranged outside the dust removal mechanism and moving along the length and height directions of the dust removal mechanism, for emitting laser to perform laser marking on the electrode arranged on the electrode conduction mechanism.

[0006] As a preferred solution of the present invention, the dust removal mechanism includes a dust removal cover, a blowing device and a dust suction device arranged in the dust removal cover; the blowing device is located at the top of the dust removal cover, and the dust suction device is located at the bottom of the dust removal cover and connects the inside and outside of the dust removal cover.

[0007] As a preferred solution of the present invention, a laser incident port is formed on one side of the dust removal cover, and the laser incident port is arranged corresponding to the laser emitting mechanism.

[0008] As a preferred solution of the present invention, a pole piece inlet and a pole piece outlet arranged in parallel are formed on the other side of the dust removal cover, and the pole piece enters the dust removal cover from the pole piece inlet and exits from the pole piece outlet.

[0009] As a preferred solution of the present invention, the pole piece conduction mechanism includes a transmission roller fixing assembly and a back roller and a passing roller arranged on the transmission roller fixing assembly; the transmission roller fixing assembly is arranged inside the dust removal mechanism; the back roller is arranged corresponding to the pole piece inlet, and the passing roller is arranged corresponding to the pole piece outlet.

[0010] As a preferred solution of the present invention, the laser emitting mechanism includes a laser integration component and an azimuth adjustment component. The laser integration component is fixed on the azimuth adjustment component and moves along the length and height directions of the dust removal mechanism under the drive of the azimuth adjustment component.

[0011] As a preferred solution of the present invention, the laser integration component includes a field lens, a galvanometer and a laser collimator; the galvanometer is arranged between the field lens and the laser collimator and is connected to the field lens and the laser collimator respectively.

[0012] As a preferred solution of the present invention, the azimuth adjustment assembly includes a first fine-tuning slide and a second fine-tuning slide. The second fine-tuning slide is arranged vertically on the first fine-tuning slide and moves along the length direction of the first fine-tuning slide.

[0013] As a preferred solution of the present invention, the first fine-tuning slide includes a first hand-cranked wheel and a first slider connected to the first hand-cranked wheel; the second fine-tuning slide includes a second hand-cranked wheel and a second slider connected to the second hand-cranked wheel; the second fine-tuning slide is fixed on the first slider, and the laser integration component is fixed on the second slider.

[0014] As a preferred solution of the present invention, an armored cable is provided on the laser collimator, one end of the armored cable is connected to the laser collimator, and the other end is connected to an external laser input device.

[0015] Compared with the prior art, the beneficial effects of the present invention are: by changing the horizontal position and distance between the laser emitting mechanism and the dust removal mechanism, the laser emitted by the laser emitting mechanism can produce laser lines of different depths at different positions on the surface of the pole piece, so as to adapt to the position requirements and depth requirements of different pole piece products for laser lines; the dust removal mechanism processes the dust generated by the laser lines, so that the dust generated by the laser lines is separated from the surface of the pole piece, thereby ensuring the production quality of subsequent products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a laser scribing machine for electrode production provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the structure of the dust removal mechanism provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of the electrode conduction mechanism provided in an embodiment of the present application;

[0019] Figure 4 A schematic diagram of the structure of the laser emission mechanism provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of the structure of the laser emission mechanism provided in an embodiment of the present application;

[0021] Figure markings: dust removal mechanism 1, dust removal cover 1-1, laser incident port 1-11, pole piece inlet 1-12, pole piece outlet 1-13, blowing device 1-2, dust suction device 1-3, pole piece conduction mechanism 2, transmission roller fixing assembly 2-1, back roller 2-2, passing roller 2-3, laser emitting mechanism 3, laser integration assembly 3-1, field lens 3-11, galvanometer 3-12, laser collimator 3-13, armor cable 3-14, azimuth adjustment assembly 3-2, first fine-tuning slide 3-21, first hand-cranked wheel 3-211, first slider 3-212, second fine-tuning slide 3-22, second hand-cranked wheel 3-221, second slider 3-222. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0023] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements described without departing from the scope of the present application. Various examples may appropriately omit, replace, or add various processes or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. In addition, features described in some examples may be combined in other examples.

[0024] See also Figure 1 , Figure 1 The figure shows a schematic diagram of the structure of a laser marking machine for producing electrode sheets provided in an embodiment of the present application. Figure 1 As shown, a laser marking machine for electrode production includes a dust removal mechanism 1 for processing dust generated on the electrode during the laser marking process of the electrode; a electrode conduction mechanism 2 arranged inside the dust removal mechanism 1, for transmitting the electrode arranged on the electrode conduction mechanism 2; a laser emitting mechanism 3, arranged outside the dust removal mechanism 1 and moving along the length direction and height direction of the dust removal mechanism 1, for emitting laser to laser mark the electrode arranged on the electrode conduction mechanism 2.

[0025] Specifically, the pole piece conduction mechanism 2 is located inside the dust removal mechanism 1, and the laser emitting mechanism 3 located outside the dust removal mechanism 1 emits a laser through the dust removal mechanism 1 to act on the pole piece surface on the pole piece conduction mechanism 2, and laser marks the pole piece surface. The dust removal mechanism 1 processes the dust generated by the laser marking so that the dust generated by the laser marking is separated from the pole piece surface; the horizontal position and distance between the laser emitting mechanism 3 and the dust removal mechanism 1 are changed so that the laser emitted by the laser emitting mechanism 3 can produce laser markings of different depths at different positions on the pole piece surface to adapt to the position requirements and depth requirements of laser marking for different pole piece products.

[0026] Preferably, the dust removal mechanism 1 includes a dust removal cover 1-1, a blowing device 1-2 and a dust suction device 1-3 arranged on the dust removal cover 1-1; the blowing device 1-2 is arranged inside the dust removal cover 1-1 and is located at the top of the dust removal cover 1-1, and is used to output flowing wind from top to bottom, and the flowing wind acts on the pole piece to blow the dust generated on the surface of the pole piece away from the surface of the pole piece; the dust suction device 1-3 is arranged at the bottom of the dust removal cover 1-1, one end of the dust suction device 1-3 is connected to the interior of the dust removal cover 1-1, and the other end is connected to the outside of the dust removal cover 1-1, and the dust blown away from the surface of the pole piece is discharged from the inside of the dust removal cover 1-1 to the outside to avoid dust accumulation.

[0027] Preferably, a laser incident port 1-11 is formed on one side of the dust removal cover 1-1, and the laser incident port 1-11 is arranged corresponding to the laser emitting mechanism 3. The laser emitted by the laser emitting mechanism 3 reaches the pole piece inside the dust removal cover 1-1 through the laser incident port 1-11, and marks the surface of the pole piece.

[0028] Preferably, the pole piece conduction mechanism 2 includes a transmission roller fixing assembly 2-1, a back roller 2-2 and a passing roller 2-3, the transmission roller fixing assembly 2-1 is fixed on the inner wall of the dust removal cover 1-1, and the back roller 2-2 and the passing roller 2-3 are arranged on the transmission roller fixing assembly 2-1; a pole piece entrance 1-12 and a pole piece exit 1-13 arranged in parallel are formed on the side of the dust removal cover 1-1 away from the laser incident port 1-11, the back roller 2-2 is arranged corresponding to the pole piece entrance 1-12, and the passing roller 2-3 is arranged corresponding to the pole piece exit 1-13; the pole piece enters the dust removal cover 1-1 from the pole piece entrance 1-12, is wound around the back roller 2-2 and the passing roller 2-3 in turn, and then passes through the dust removal cover 1-1 from the pole piece exit 1-13, the back roller 2-2 and the passing roller 2-3 rotate in the same direction to drive the pole piece wound around the back roller 2-2 and the passing roller 2-3 in turn to move along the rotation direction.

[0029] Specifically, the back roller 2-2 is also arranged corresponding to the laser incident port 1-11, and the laser emitted by the laser emitting mechanism 3 acts on the surface of the pole piece wound on the back roller 2-2 through the laser incident port 1-11.

[0030] Furthermore, the back roller material hardness is greater than 700HV, and the circular runout is less than 0.02mm.

[0031] Preferably, the laser emitting mechanism 3 includes a laser integration component 3-1 and an azimuth adjustment component 3-2; the laser integration component 3-1 is used to perform beam collimation, aberration correction and beam focusing operations on the laser input from an external laser input device to converge the divergent laser and improve the efficiency of laser marking; the laser integration component 3-1 is fixed on the azimuth adjustment component 3-2 and moves along the length and height directions of the dust removal mechanism 1 under the drive of the azimuth adjustment component 3-2, so that the laser emitted by the laser integration component 3-1 can act on different positions on the surface of the electrode and produce different degrees of marking depth to adapt to the marking process requirements of different electrode products and improve product quality.

[0032] Preferably, the laser integration component 3-1 includes a field lens 3-11, a galvanometer 3-12 and a laser collimator 3-13. The galvanometer 3-12 is arranged between the field lens 3-11 and the laser collimator 3-13 and is connected to the field lens 3-11 and the laser collimator 3-13 respectively; an armored cable 3-14 is arranged on the laser collimator 3-13, one end of the armored cable 3-14 is connected to the laser collimator 3-13, and the other end is connected to an external laser input device. The external laser input device inputs the laser to the laser collimator 3-13 through the armored cable 3-14. The laser collimator 3-13 collimates the external input laser and converges the external input divergent laser. Then the laser collimator 3-13 transmits the converged laser beam to the galvanometer 3-12. The galvanometer 3-12 corrects the aberration of the laser beam and compensates for the field curvature and distortion of the system. Then the galvanometer 3-12 transmits the corrected laser beam to the field lens 3-11. The field lens 3-11 focuses the laser beam to obtain a concentrated light spot with high energy density, thereby improving the efficiency of laser processing.

[0033] Preferably, the azimuth adjustment assembly 3-2 includes a first fine-tuning slide 3-21 and a second fine-tuning slide 3-22, both of which can move in a straight line. Therefore, the second fine-tuning slide 3-22 is arranged perpendicularly on the first fine-tuning slide 3-21, so that the first fine-tuning slide 3-21 can drive the second fine-tuning slide 3-22 to move along the length of the first fine-tuning slide 3-21. Simultaneously, the laser integration assembly 3-1 is arranged parallel to the second fine-tuning slide 3-22, so that the second fine-tuning slide 3-22 can drive the laser integration assembly 3-1 to move along the length of the second fine-tuning slide 3-22. That is, the laser integration assembly 3-1 moves along the length and height of the azimuth adjustment assembly 3-2 under the drive of the first fine-tuning slide 3-21 and the second fine-tuning slide 3-22.

[0034] Preferably, the first fine-tuning slide 3-21 includes a first hand-cranked wheel 3-211 and a first slider 3-212 that is transmission-connected to the first hand-cranked wheel 3-211; the second fine-tuning slide 3-22 includes a second hand-cranked wheel 3-221 and a second slider 3-222 that is transmission-connected to the second hand-cranked wheel 3-221; the second fine-tuning slide 3-22 is fixed on the first slider 3-212, and the laser integration assembly 3-1 is fixed on the second slider 3-222.

[0035] Specifically, a screw transmission is used between the first hand-cranked wheel 3-211 and the first slider 3-212. The first hand-cranked wheel 3-211 converts the curvilinear motion when the operator turns the first hand-cranked wheel 3-211 into the linear motion of the first slider 3-212, and the first slider 3-212 drives the second fine-tuning slide 3-22 fixed thereon to perform linear motion; a screw transmission is also used between the second hand-cranked wheel 3-221 and the second slider 3-222. The second hand-cranked wheel 3-221 converts the curvilinear motion when the operator turns the second hand-cranked wheel 3-221 into the linear motion of the second slider 3-222, and the second slider 3-222 drives the laser integration component 3-1 fixed thereon to perform linear motion; the laser integration component 3-1 realizes the motion in the linear direction and perpendicular to the linear direction under the joint action of the first fine-tuning slide 3-21 and the second fine-tuning slide 3-22, that is, the motion in the length direction and height direction of the dust removal mechanism 1, so as to change the horizontal position and depth of the laser beam acting on the surface of the pole piece.

[0036] The above description of the disclosed embodiments will enable those skilled in the art to implement 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 limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0037] Although this document frequently uses the following terms: dust removal mechanism 1, dust removal cover 1-1, laser incident port 1-11, pole piece inlet 1-12, pole piece outlet 1-13, blowing device 1-2, dust suction device 1-3, pole piece conducting mechanism 2, transmission roller fixing assembly 2-1, back roller 2-2, passing roller 2-3, laser emitting mechanism 3, laser integration assembly 3-1, field lens 3-11, galvanometer 3-12, laser collimator 3-13, armor cable 3-14, azimuth adjustment assembly 3-2, first fine-tuning slide 3-21, first hand-cranked wheel 3-211, first slider 3-212, second fine-tuning slide 3-22, second hand-cranked wheel 3-221, second slider 3-222, etc., the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A laser marking machine for electrode production, characterized in that: include: A dust removal mechanism (1) for processing dust generated on the pole piece during the pole piece laser scribing process; A pole piece conducting mechanism (2) is arranged inside the dust removal mechanism (1) and is used to transmit the pole piece provided on the pole piece conducting mechanism (2); The laser emitting mechanism (3) is arranged outside the dust removal mechanism (1) and moves along the length direction and height direction of the dust removal mechanism (1), and is used for emitting laser light to perform laser marking on the pole piece provided on the pole piece conducting mechanism (2).

2. A laser marking machine for electrode production according to claim 1, characterized in that: The dust removal mechanism (1) comprises a dust removal outer cover (1-1), a blowing device (1-2) and a dust suction device (1-3) arranged on the dust removal outer cover (1-1); the blowing device (1-2) is located at the top of the dust removal outer cover (1-1), and the dust suction device (1-3) is located at the bottom of the dust removal outer cover (1-1) and communicates with the inside and outside of the dust removal outer cover (1-1).

3. A laser marking machine for electrode production according to claim 2, characterized in that: A laser incident port (1-11) is formed on one side of the dust removal cover (1-1), and the laser incident port (1-11) is arranged corresponding to the laser emitting mechanism (3).

4. A laser marking machine for electrode production according to claim 3, characterized in that: A pole piece inlet (1-12) and a pole piece outlet (1-13) arranged in parallel are formed on the other side of the dust removal outer cover (1-1); the pole piece enters the dust removal outer cover (1-1) from the pole piece inlet (1-12) and exits from the pole piece outlet (1-13).

5. A laser marking machine for electrode production according to claim 4, characterized in that: The pole piece conduction mechanism (2) comprises a drive roller fixing assembly (2-1) and a back roller (2-2) and a passing roller (2-3) arranged on the drive roller fixing assembly (2-1); the drive roller fixing assembly (2-1) is fixed on the inner wall of the dust removal cover (1-1); the back roller (2-2) is arranged corresponding to the pole piece inlet (1-12), and the passing roller (2-3) is arranged corresponding to the pole piece outlet (1-13).

6. The laser marking machine for electrode production according to claim 1, characterized in that: The laser emitting mechanism (3) comprises a laser integration component (3-1) and an azimuth adjustment component (3-2); the laser integration component (3-1) is fixed on the azimuth adjustment component (3-2) and moves along the length direction and height direction of the dust removal mechanism (1) under the drive of the azimuth adjustment component (3-2).

7. A laser marking machine for electrode production according to claim 6, characterized in that: The laser integration component (3-1) comprises a field mirror (3-11), a galvanometer (3-12) and a laser collimator (3-13); the galvanometer (3-12) is arranged between the field mirror (3-11) and the laser collimator (3-13) and is connected to the field mirror (3-11) and the laser collimator (3-13) respectively.

8. The laser marking machine for electrode production according to claim 6, characterized in that: The azimuth adjustment component (3-2) comprises a first fine-tuning slide (3-21) and a second fine-tuning slide (3-22); the second fine-tuning slide (3-22) is arranged vertically on the first fine-tuning slide (3-21) and moves along the length direction of the first fine-tuning slide (3-21).

9. A laser marking machine for electrode production according to claim 8, characterized in that: The first fine-tuning slide (3-21) comprises a first hand-cranked wheel (3-211) and a first slider (3-212) in transmission connection with the first hand-cranked wheel (3-211); the second fine-tuning slide (3-22) comprises a second hand-cranked wheel (3-221) and a second slider (3-222) in transmission connection with the second hand-cranked wheel (3-221); the second fine-tuning slide (3-22) is fixedly mounted on the first slider (3-212), and the laser integration component (3-1) is fixedly mounted on the second slider (3-222).

10. The laser marking machine for electrode production according to claim 7, characterized in that: An armored cable (3-14) is provided on the laser collimator (3-13); one end of the armored cable (3-14) is connected to the laser collimator (3-13), and the other end is connected to an external laser input device.

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