Solid-state battery assembly line laser online patterning processing device

Abstract

The utility model discloses a solid-state battery assembly line laser on-line patterning processing device, which adopts a one-dimensional scanning galvanometer to vertically scan 1 * n linear array sub-beams obtained by a diffraction beam splitting element to realize array scanning etching processing, by combining the movement of a current collector, an electrode membrane or an electrolyte membrane in a solid-state battery assembly line, a staggered network micro-nano structure pattern is prepared on the surface of the current collector, the electrode membrane or the electrolyte membrane of the solid-state battery; the beam splitting number n of the diffraction beam splitting element is determined by the movement speed v of a solid-state battery current collector, an electrode membrane or an electrolyte membrane, the scanning processing linear speed omega of the one-dimensional scanning galvanometer, the length L of a scanning line segment and the focusing sub-spot spacing d; a lithium ion three-dimensional transmission network is constructed on the surfaces of a current collector, an electrode membrane and an electrolyte membrane by adopting an ultrafast laser online patterning processing method, so that the lithium ion transmission performance and the energy density are improved, and the technical effects of high energy storage density and rapid charging and discharging are achieved.

Description

Technical Field

[0001] The utility model relates to a laser online patterning processing device for a solid-state battery assembly line, belonging to the technical field of solid-state battery manufacturing. Background Art

[0002] The essential difference between solid-state batteries and liquid batteries is that the electrolyte is replaced by a solid electrolyte, which makes it have higher safety and energy density, fast charging, long battery life, strong cycle performance and good low-temperature performance. In solid-state batteries, the current collector and the electrode membrane, the electrode membrane, and the electrode membrane and the electrolyte membrane are all formed by calendering. Due to the lack of wettability between the solid phases, the charge transfer is slow and the interface resistance is large, which is not conducive to the transmission of lithium ions between the positive and negative electrodes. It seriously limits the utilization rate of the electrode active material, the uniformity of the charge and discharge reaction, and the actual electrical properties of the electrode as a whole, such as energy density, power density and cycle life, thus affecting the fast charging performance and cycle life. It has been reported that femtosecond laser two-dimensional scanning is used to perform patterned etching on the surface of the positive electrolyte film or the negative electrolyte film, thereby improving the wettability between the positive electrolyte film and the negative electrolyte film, but it is limited to patterning the surface of the statically placed film and cannot meet the online production and processing requirements of the production line. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a solid-state battery assembly line laser online patterning processing method and device, which adopts a one-dimensional scanning galvanometer to vertically scan the 1×n line array sub-beam to realize array scanning etching processing, and combines the movement of the solid-state battery assembly line to realize the online preparation of an interlaced network of micro-nano structure patterns on the surface of the solid-state battery current collector, electrode membrane or electrolyte membrane.

[0004] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a solid-state battery assembly line laser online patterning processing device, the device includes an ultrafast laser, a machine platform, a beam expander, a reflective and folding optical path, a diffraction beam splitting element and a scanning processing head;

[0005] The light beam output by the ultrafast laser passes through a beam expander and a reflective folding optical path, and is evenly split into 1×n linear array sub-beams by a diffraction beam splitting element. After passing through a scanning processing head, 1×n linear array focused sub-spots are formed on the focal plane of the scanning processing head. The spacing between the focused sub-spots is d. The scanning processing head scans n focused line segments of length L at a linear speed ω. The current collector, electrode membrane or electrolyte membrane in the solid-state battery assembly line moves in a straight line at a speed of υ under the traction of an external traction force, thereby preparing a staggered network of micro-nanostructure patterns on the surface of the current collector, electrode membrane or electrolyte membrane of the solid-state battery.

[0006] The ultrafast laser is preferably a picosecond laser or a femtosecond laser, with a maximum repetition frequency of not less than 100kHz and a pulse width of not more than 20ps. The depth and width of the scanning etching groove are controlled by adjusting the output power, repetition frequency, single pulse energy and scanning speed of the ultrafast laser.

[0007] The machine is a gantry-type marble platform, which is used to support the ultrafast laser, beam expander, reflective and refractive optical path, diffraction beam splitter element and scanning head;

[0008] The beam expander is a beam expander system composed of a negative lens and a positive lens, which is used to expand the light beam output by the ultrafast laser, thereby compressing the divergence angle of the light beam; the reflective folding optical path is composed of three 45° reflectors and an optical path sealing tube, and the reflectivity of the reflector to the ultrafast laser output light beam is not less than 98%, and is used to fold the light beam output by the ultrafast laser;

[0009] The diffraction beam splitting element is a one-dimensional Dammann grating with 1×n beam splitting, the beam splitting number n is shown in the following formula, the beam splitting angle is d / f, and the beam output by the ultrafast laser is split into n sub-beams with energy consistency exceeding 95%, and each sub-beam is located in the same plane;

[0010]

[0011] The scanning processing head is composed of a one-dimensional scanning galvanometer and a field lens, and the n sub-beams output by the diffraction beam splitting element are formed into 1×n focusing dot array line segments on the focal plane of the field lens. The dot array line segments are parallel to the movement direction of the assembly line of the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The one-dimensional scanning galvanometer is used to etch and process n grooves on the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The scanning direction of the one-dimensional scanning galvanometer is perpendicular to the movement direction of the assembly line of the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The one-dimensional scanning galvanometer is composed of a high-speed swing motor, a reflector and a drive controller. Under the drive control of the drive controller, the high-speed swing motor drives the reflector to swing back and forth at high speed alternately clockwise and counterclockwise, and the swing angle is not greater than ±20°, thereby realizing the reciprocating swing processing of the 1×n focusing dot array. The focal length of the field lens is f, and the maximum receiving angle is not greater than ±20°.

[0012] Beneficial effects: The utility model provides a solid-state battery assembly line laser online patterning processing device, which uses a one-dimensional scanning galvanometer to vertically scan the 1×n line array sub-beams obtained by the diffraction beam splitting element to realize array scanning etching processing, and combines the movement of the solid-state battery collector, electrode membrane or electrolyte membrane to realize the preparation of a staggered network of micro-nano structure patterns on the surface of the solid-state battery collector, electrode membrane or electrolyte membrane; the number of beams n of the diffraction beam splitting element is determined by the movement speed υ of the solid-state battery collector, electrode membrane or electrolyte membrane, the scanning processing linear speed ω of the one-dimensional scanning galvanometer, the length L of the scanning line segment and the focusing sub-spot spacing d; an ultrafast laser online patterning processing method is used to construct a three-dimensional lithium ion transmission network on the surface of the collector, electrode membrane and electrolyte membrane, thereby improving the lithium ion transmission performance and energy density, and achieving the technical effects of high energy storage density and rapid charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a solid-state battery assembly line laser online patterning processing device.

[0014] Figure 2 It is a schematic diagram of the laser online patterning processing of a solid-state battery assembly line.

[0015] Figure 3 It is an interlaced network structure pattern. DETAILED DESCRIPTION

[0016] Example 1: A solid-state battery assembly line laser online patterning processing device.

[0017] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a device used in a laser online patterning processing method for a solid-state battery assembly line includes an ultrafast laser, a machine, a beam expander, a reflective refraction optical path, a diffraction beam splitting element, and a scanning processing head; the light beam output by the ultrafast laser passes through the beam expander and the reflective refraction optical path, and is evenly split into 1×11 linear array sub-beams by the diffraction beam splitting element, and after passing through the scanning processing head, 1×11 linear array focusing sub-spots are formed on the focal plane of the scanning processing head, and the spacing between the focusing sub-spots is 1.0 mm. The scanning processing head scans 11 focusing line segments with a length of 100 mm at a linear speed of 2000 mm / s, and the current collector, electrode membrane or electrolyte membrane in the solid-state battery assembly line moves linearly at a speed of 110 mm / s under the traction of an external traction force, thereby preparing a staggered network of micro-nano structure patterns on the surface of the current collector, electrode membrane or electrolyte membrane of the solid-state battery;

[0018] The ultrafast laser is a UV picosecond laser with a maximum repetition frequency of 500kHz and a pulse width of 10ps. The depth and width of the scanning etching groove are controlled by adjusting the output power, repetition frequency, single pulse energy and scanning speed of the ultrafast laser.

[0019] The machine is a gantry-type marble platform, which is used to support the ultrafast laser, beam expander, reflective and refractive optical path, diffraction beam splitter element and scanning head;

[0020] The beam expander is a triple beam expander system composed of a negative lens and a positive lens, which is used to triple expand the light beam output by the ultrafast laser, thereby compressing the divergence angle of the light beam; the reflective folding optical path is composed of three 45° reflectors and an optical path sealing tube, and the reflectivity of the reflector to the ultrafast laser output light beam is 99%, which is used to fold the light beam output by the ultrafast laser;

[0021] The diffraction beam splitting element is a one-dimensional Dammann grating with a 1×n beam splitting angle of d / f, which splits the light beam output by the ultrafast laser into n sub-beams with energy consistency exceeding 95%, and each sub-beam is located in the same plane;

[0022] The diffraction beam splitting element is a one-dimensional Dammann grating with a 1×11 beam splitting angle of 10 mrad, which splits the beam output by the ultrafast laser into 11 sub-beams with an energy consistency of 98%, and each sub-beam is located in the same plane;

[0023] The scanning processing head is composed of a one-dimensional scanning galvanometer and a field lens. The 11 sub-beams output by the diffraction beam splitting element form a 1×11 focusing dot matrix line segment on the focal plane of the field lens. The dot matrix line segment is parallel to the movement direction of the assembly line of the solid-state battery collector, electrode membrane or electrolyte membrane. 11 grooves are etched on the solid-state battery collector, electrode membrane or electrolyte membrane by scanning with the one-dimensional scanning galvanometer. The scanning direction of the one-dimensional scanning galvanometer is perpendicular to the movement direction of the assembly line of the solid-state battery collector, electrode membrane or electrolyte membrane. The one-dimensional scanning galvanometer is composed of a high-speed swing motor, a reflector and a drive controller. Under the drive control of the drive controller, the high-speed swing motor drives the reflector to swing back and forth at a high speed alternately clockwise and counterclockwise, and the swing angle is ±20°, thereby realizing the reciprocating swing processing of the 1×11 focusing dot matrix. The focal length of the field lens is 100 mm, and the maximum receiving angle is ±20°.

[0024] Example 2: A method and apparatus for laser online patterning of a solid-state battery current collector, an electrode membrane, and an electrolyte membrane, wherein the ultrafast laser is an infrared femtosecond laser, a green light femtosecond laser, or an ultraviolet femtosecond laser, with a maximum repetition frequency of 2.0 MHz and a pulse width of 300 fs; the rest is the same as Example 1.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A solid-state battery assembly line laser online patterning processing device, characterized in that: The device includes an ultrafast laser, a machine platform, a beam expander, a reflective and deflecting optical path, a diffraction beam splitting element and a scanning processing head; The light beam output by the ultrafast laser passes through a beam expander and a reflective folding optical path, and is evenly split into 1×n linear array sub-beams by a diffraction beam splitting element. After passing through a scanning processing head, 1×n linear array focused sub-spots are formed on the focal plane of the scanning processing head. The spacing between the focused sub-spots is d. The scanning processing head scans n focused line segments of length L at a linear speed ω. The current collector, electrode membrane or electrolyte membrane in the solid-state battery assembly line moves in a straight line at a speed of υ under the traction of an external traction force, thereby preparing a staggered network of micro-nano structure patterns on the surface of the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The ultrafast laser is a picosecond laser or a femtosecond laser, with a maximum repetition frequency of not less than 100 kHz and a pulse width of not more than 20 ps; The machine platform is a gantry-type marble platform; The beam expander is a beam expander system composed of a negative lens and a positive lens; The reflection and folding optical path is composed of three 45° reflectors and an optical path sealing tube, and the reflectivity of the reflectors to the output beam of the ultrafast laser is not less than 98%; The diffraction beam splitting element is a one-dimensional Dammann grating with 1×n beam splitting, the beam splitting number n is shown in the following formula, the beam splitting angle is d / f, and the beam output by the ultrafast laser is split into n sub-beams with energy consistency exceeding 95%, and each sub-beam is located in the same plane; The scanning processing head is composed of a one-dimensional scanning galvanometer and a field lens. The n sub-beams output by the diffraction beam splitting element form a 1×n focusing dot matrix line segment on the focal plane of the field lens. The dot matrix line segment is parallel to the movement direction of the assembly line of the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The one-dimensional scanning galvanometer scans and processes n grooves on the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The scanning direction of the one-dimensional scanning galvanometer is perpendicular to the movement direction of the assembly line of the current collector, electrode membrane or electrolyte membrane of the solid-state battery. The one-dimensional scanning galvanometer is composed of a high-speed swing motor, a reflector and a drive controller. Under the drive control of the drive controller, the high-speed swing motor drives the reflector to swing back and forth at a high speed alternately clockwise and counterclockwise, and the swing angle is not greater than ±20°, thereby realizing the reciprocating swing processing of the 1×n focusing dot matrix. The focal length of the field lens is f, and the maximum receiving angle is not greater than ±20°.

2. A solid-state battery assembly line laser online patterning processing device as claimed in claim 1, characterized in that A one-dimensional scanning galvanometer is used to vertically scan the 1×n line array sub-beams obtained by the diffraction beam splitting element to realize array scanning etching processing, and combined with the movement of the current collector, electrode membrane or electrolyte membrane in the solid-state battery assembly line, an interlaced network of micro-nano structure patterns is prepared on the surface of the solid-state battery current collector, electrode membrane or electrolyte membrane.

3. A solid-state battery assembly line laser online patterning processing device as claimed in claim 1, characterized in that The number of beam splitting n of the diffraction beam splitting element is determined by the movement speed υ of the current collector, electrode membrane or electrolyte membrane in the solid-state battery production line, the scanning processing linear speed ω of the one-dimensional scanning galvanometer, the length L of the scanning line segment and the focusing sub-spot spacing d.

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