Processing device for performing high-precision patterning on BC battery

Abstract

The processing device comprises a field lens for a light source to penetrate through, a platform is arranged under the field lens, a battery piece to be processed is placed on the platform, a ceramic baffle is further fixedly installed between the field lens and the platform, the ceramic baffle is located under the field lens, and the field lens is fixedly installed on the platform. And the ceramic baffle plate is provided with a submicron processing pattern area. The device has the advantages that the machining precision is guaranteed, meanwhile, the equipment cost is reduced, and the efficiency and yield of the battery pieces are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser precision machining, in particular to a high-precision patterning machining device for BC batteries. BACKGROUND

[0002] BC batteries have been facing the challenge of patterning technology. The traditional mask lithography method is difficult to adapt to the demand of large-scale production in terms of complicated process, high cost and low yield. In order to overcome this technical problem, laser patterning technology has made an important breakthrough in realizing low-cost high-capacity for BC batteries. Compared with the traditional method, laser patterning technology completes the machining by femtosecond, picosecond and sub-picosecond ultrafast laser one-step method, successfully simplifies the process, reduces the production cost and improves the yield of the product. By solving the problem of patterning technology, BC batteries can better meet the market demand and promote the development of the entire industry. Laser patterning technology not only simplifies the process, but also reduces the production cost. This is of great significance for the large-scale production of BC batteries.

[0003] However, since the positive and negative electrodes of the BC battery are on the back, in order to effectively isolate the positive and negative electrodes of the BC battery and maintain high photoelectric conversion efficiency, complex pattern design needs to be performed on the positive and negative electrodes in advance. After the pattern is drawn, the laser will call the corresponding pattern file and process according to the pattern file. In order to achieve the desired effect, the laser equipment needs to have high marking precision to meet this demand. The precision of laser marking mainly depends on the precision of the galvanometer, which is an optical device for accurately controlling the deflection of the laser beam. The precision directly affects the precision and quality of the marking.

[0004] In the existing laser marking technology, high-precision galvanometers are usually used to control the deflection of the laser beam to achieve high-precision marking. At the same time, in order to ensure the precision of marking, complex pattern drawing and parameter setting need to be performed in the laser marking software.

[0005] However, the existing laser marking technology has some problems. First, high-precision galvanometers rely on imports and are expensive, increasing equipment costs. Second, the precision of the galvanometer is affected by many factors, such as galvanometer marking speed, cold and hot state of the galvanometer, service life of the galvanometer, and temperature and humidity of the surrounding environment. Once one of these factors has a problem, it will cause the precision of the galvanometer marking to decrease. Third, even if imported high-precision galvanometers are used and all conditions meet the working requirements of the galvanometer, the precision can only be controlled within 15um.

[0006] Therefore, the existing laser marking technology has the problems of high equipment cost and marking precision being easily affected by many external factors when patterning processing is performed on the battery, resulting in reduced efficiency and yield of the processed battery sheet. The utility model discloses

[0007] In order to guarantee the processing precision, reduce the equipment cost, improve the battery piece efficiency and the yield, the present application provides a kind of high-precision patterning processing device to BC battery.

[0008] The present application provides a kind of high-precision patterning processing device to BC battery, adopt following technical scheme:

[0009] A kind of high-precision patterning processing device to BC battery, including the field lens that light source passes through, the platform is equipped in the direct below of the field lens, the platform is placed with the battery piece to be processed, ceramic baffle is also fixedly installed between the field lens and platform, the ceramic baffle is located in the direct below of field lens, the ceramic baffle is with submicron level processing pattern area.

[0010] By adopting the above technical scheme, when light source passes through field lens, field lens can be divided into 100 microns level light beam, by increasing ceramic baffle, since ceramic baffle has submicron level processing pattern, light beam can process submicron level pattern to battery piece after passing through ceramic baffle, can bring good processing effect, without high-precision galvanometer setting complex parameter setting, just need to guarantee that the laser processing area passing through galvanometer can completely cover the pattern area on ceramic baffle, operation is simpler, guarantee processing precision, reduce equipment cost, improve battery piece efficiency and yield.

[0011] Optionally, the surface roughness of the ceramic baffle is less than 0.1 μm, the flatness of the ceramic baffle is less than 0.01 mm, and the precision of the ceramic baffle pattern processing area is 0.1-1 μm.

[0012] By adopting the above technical scheme, the processing precision less than 1 μm is submicron level, the precision of the ceramic baffle pattern processing area of the present application is 0.1-1 μm, which can reach submicron level and ensure high-precision processing of the battery piece.

[0013] Optionally, the ceramic baffle is made of alumina ceramic.

[0014] Optionally, the ceramic baffle is provided with a fixing column on one side, the fixing column is fixedly provided with a mounting rod, and the mounting rod is provided with a fixing assembly at an end away from the fixing column.

[0015] By adopting the above technical scheme, when the ceramic baffle needs to be disassembled and replaced, the disassembly can be realized through the fixing assembly, and when the position of the ceramic baffle needs to be fixed, the fixing assembly can fix it.

[0016] Optionally, the fixing assembly comprises a positioning pin fixed to one side of the ceramic baffle, the mounting rod is provided with a positioning slot at one end close to the ceramic baffle, the positioning pin and the positioning slot are inserted with each other, the fixing assembly further comprises a precision screw screwed to the end of the mounting rod, the precision screw penetrates the positioning pin and the mounting rod at the same time, and the axis of the precision screw is perpendicular to the positioning pin.

[0017] By adopting the above technical scheme, the precision screw penetrates the positioning pin and the mounting rod, so that the positioning pin is fixed in the positioning slot, and the ceramic baffle can be fixed to the end of the mounting rod.

[0018] Optionally, the side of the platform is provided with a limiting piece for limiting the battery piece, the limiting piece comprises an abutting portion and a mounting portion, the mounting portion is mounted to the side wall of the platform, the abutting portion is perpendicular to the mounting portion and extends upward, and the abutting portion abuts against the side of the battery piece.

[0019] By adopting the above technical scheme, the limiting piece limits the position of the battery piece, so that the accuracy of the battery piece during processing is ensured.

[0020] Optionally, the mounting portion is in sliding connection with the platform, the side wall of the platform is provided with a mounting slot, one end of the mounting portion away from the abutting portion is inserted into the mounting slot, the length direction of the mounting slot is perpendicular to the center of the platform, a tension spring is fixed in the mounting slot, one end of the tension spring is fixed to the inner wall of the mounting slot, and the other end is fixedly connected to one end of the mounting portion away from the abutting portion.

[0021] By adopting the above technical scheme, when the battery piece is placed on the platform, the tension spring gives the limiting piece a force in the direction close to the center of the platform, so that the battery piece is limited in the center position of the platform, thereby ensuring the accuracy of processing.

[0022] Optionally, the platform is further provided with a sliding groove penetrating the mounting slot, the length direction of the sliding groove is parallel to the length direction of the mounting slot, and the length of the sliding groove is smaller than that of the mounting slot, and the end of the mounting portion close to the spring is fixed with a sliding block, and the sliding block is in sliding connection with the sliding groove.

[0023] By adopting the above technical scheme, the sliding block is in sliding connection with the sliding groove, so that the condition that the mounting portion is completely separated from the mounting slot can be reduced.

[0024] In summary, the present application has the following beneficial effects:

[0025] 1、When the light source passes through the field lens, the field lens can divide the light source into a light beam of 100 microns, by increasing the ceramic baffle, since the ceramic baffle has a sub-micron processing pattern, the light beam can process a sub-micron pattern on the battery piece after passing through the ceramic baffle, which can bring good processing effect, without setting complex parameters for high-precision galvanometer, only need to ensure that the laser processing area passing through the galvanometer can completely cover the pattern area on the ceramic baffle, the operation is simpler, ensures the processing precision, reduces the equipment cost, improves the efficiency and yield of the battery piece.

[0026] 2、When the battery piece is processed in the application, the precision of the pattern mainly depends on the processing precision of the ceramic baffle, and is not affected by the galvanometer, even if a low-precision galvanometer is used, the high precision of pattern processing can be ensured, as long as the processing area can cover the pattern part of the ceramic baffle, the pattern processing precision is not easily affected by external environmental factors.

[0027] 3、The processing device of the application has the advantages of low cost, high precision, strong stability and simple operation when processing the battery piece. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic view of the field lens, the ceramic baffle and the fixed column.

[0029] Figure 2 It is a structural schematic view of the platform and the fixed column.

[0030] Figure 3 It is a partial enlarged view of the fixed assembly at A in Figure 2

[0031] Figure 4 It is a structural view of the patterned processing area of the ceramic baffle.

[0032] Figure 5 It is a sectional view of the platform and the limiting piece.

[0033] Explanation of reference signs: 1, fixed column; 11, support rod; 12, mounting rod; 13, fixed rod; 2, field lens; 3, ceramic baffle; 4, platform; 41, limiting piece; 411, abutting part; 412, mounting part; 413, sliding block; 42, mounting groove; 43, tension spring; 44, sliding groove; 5, battery piece; 6, fixed assembly; 61, positioning pin; 62, positioning groove; 63, precision screw. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings Figure 1 - the drawings Figure 5 The application will be further described in detail.

[0035] The embodiment of the application discloses a high-precision patterning processing device for BC battery.​

[0036] Referring to Figure 1 and Figure 2 , a high-precision patterning processing device for BC battery includes a vertical fixed column 1, a field lens 2, a ceramic baffle 3 and a platform 4 are sequentially fixed on the fixed column 1 from top to bottom, and the center points of the three in the vertical direction are located on the same straight line, and the platform 4 is placed with the battery piece 5 to be processed. When laser patterning processing is performed, the laser light source passes through the low-precision galvanometer (not shown in the figure) to reach the field lens 2, the field lens 2 divides the light beam into small beams of 100 microns and reaches the ceramic baffle 3, the ceramic baffle 3 has a sub-micron level patterning area, so that the laser passing through the ceramic baffle 3 to the battery piece 5 is more accurate, and the high-precision patterning processing of the battery piece 5 is ensured.

[0037] The upper end of the fixed column 1 is fixed with a horizontally arranged support rod 11, and the end away from the fixed column 1 of the support rod 11 is fixedly connected with the field lens 2. The middle section of the fixed column 1 is also fixed with a horizontally arranged mounting rod 12, and the end away from the fixed column 1 of the mounting rod 12 is provided with a fixing assembly 6. The mounting rod 12 is fixedly connected with the ceramic baffle 3 through the fixing assembly 6, so that the ceramic baffle 3 is located directly below the field lens 2.

[0038] Referring to Figure 2 and Figure 3 , the fixing assembly 6 includes a positioning pin 61 fixed on one side of the ceramic baffle 3, and the positioning pin 61 is located at the middle section of the side of the ceramic baffle 3. The fixing assembly 6 further includes a positioning groove 62 opened at the end of the mounting rod 12 away from the fixed column 1, and the positioning pin 61 is horizontally inserted into the positioning groove 62. Two precision screws 63 are threadedly connected on the mounting rod 12, and the two precision screws 63 are vertically penetrating the positioning pin 61 and the positioning groove 62, so that the positioning pin 61 is fixed in the positioning groove 62, realizing the fixed connection of the ceramic baffle 3 and the mounting rod 12. When it is necessary to disassemble the ceramic baffle 3, the positioning pin 61 is separated from the positioning groove 62 by disassembling the precision screw, so that the ceramic baffle 3 can be disassembled and replaced.

[0039] Referring to Figure 4 , the precision of the patterning area of the ceramic baffle 3 is 0.1-1μm, the size of the ceramic baffle 3 is 220mm*220mm, the thickness is 2mm, the material is alumina ceramic, the surface roughness is less than 0.1μm, and the flatness is less than 0.01mm.

[0040] Referring to Figure 2 and Figure 5The fixed column 1 is further horizontally fixed with a fixed rod 13, and the end of the fixed rod 13 away from the fixed column 1 is horizontally fixed with the platform 4, so that the platform 4 is located directly below the ceramic baffle 3, and the upper surface of the platform 4 is used for placing the battery piece 5. The platform 4 is rectangular, and the four sides of the platform 4 are all installed with a limiting piece 41, which can abut against the side edge of the battery piece 5, so that the battery piece 5 can be stably placed on the platform 4, and the stability during processing is ensured.

[0041] With reference to Figure 5 Each limiting piece 41 is in sliding connection with the side wall of the platform 4, so that each limiting piece 41 can slide horizontally towards or away from the platform 4. Each limiting piece 41 comprises an abutting portion 411 and a mounting portion 412, the abutting portion 411 is perpendicular to the mounting portion 412, so that the limiting piece 41 is L-shaped, the abutting portion 411 vertically extends upwards, and the abutting portion 411 can abut against the side edge of the battery piece 5. The mounting portion 412 is slidingly mounted on the platform 4. The side wall of the platform 4 is horizontally provided with a mounting groove 42, and the mounting portion 412 is slidingly mounted in the mounting groove 42. A tension spring 43 is fixed in the mounting groove 42. One end of the tension spring 43 is fixed with the mounting groove 42, and the other end is fixedly connected with the mounting portion 412. The upper and lower sides of the mounting portion 412 are both fixed with a sliding block 413, and the sliding block 413 is located at the end of the mounting portion 412 away from the abutting portion 411. The platform 4 is further provided with a sliding groove 44 for horizontal sliding of the sliding block 413. The sliding groove 44 is in communication with the mounting groove 42, and is parallel to the mounting groove 42. The length of the sliding groove 44 is shorter than that of the mounting groove 42, which limits the sliding of the mounting portion 412 in the horizontal direction, and reduces the condition that the limiting piece 41 completely separates from the platform 4.

[0042] The implementation principle of the high-precision patterning processing device for the BC battery is as follows: when the battery piece 5 needs to be processed, the battery piece 5 is horizontally placed on the platform 4, and the limiting piece 41 abuts against the side edge of the battery piece 5 to limit the battery piece 5, so that the battery piece 5 is located in the middle position of the platform 4, and the processing area can completely cover the pattern area of the ceramic baffle 3. The laser light source sequentially passes through the low-precision galvanometer, the field lens 2 and the ceramic baffle 3, and the high-precision processing of the battery piece 5 is realized under the action of the ceramic baffle 3, which saves the cost. Due to the improvement of the processing precision, the transportation between the carriers and the metal electrons tends to be balanced, thereby reducing the series resistance and improving the efficiency and yield of the battery piece 5.

[0043] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A high-precision patterning processing device for BC batteries, characterized by: The invention comprises a field lens (2) for a light source to pass through, a platform (4) being provided directly below the field lens (2), a cell (5) to be processed being placed on the platform (4), a ceramic baffle (3) being fixedly installed between the field lens (2) and the platform (4), the ceramic baffle (3) being located directly below the field lens (2), and having a submicron-level processed graphic area on the ceramic baffle (3).

2. The high-precision patterning device for BC battery according to claim 1, characterized in that: The surface roughness of the ceramic baffle (3) is less than 0.1 μm, the flatness of the ceramic baffle (3) is less than 0.01 mm, and the precision of the graphic processing area of ​​the ceramic baffle (3) is 0.1-1 μm.

3. The high-precision patterning device for BC battery according to claim 1, characterized in that: The material of the ceramic baffle (3) is alumina ceramic.

4. The high-precision patterning device for BC battery according to claim 1, characterized in that: A fixing column (1) is installed on one side of the ceramic baffle (3), a mounting rod (12) is fixed on the fixing column (1), a fixing assembly (6) is provided at one end of the mounting rod (12) away from the fixing column (1), and the ceramic baffle (3) is fixedly connected to the ceramic baffle (3) via the fixing assembly (6).

5. The apparatus for high-precision patterning of BC batteries according to claim 4, characterized in that: The fixing assembly (6) includes a positioning pin (61) fixed to one side of the ceramic baffle (3); a positioning groove (62) is provided at one end of the mounting rod (12) close to the ceramic baffle (3); the positioning pin (61) and the positioning groove (62) are plugged into each other; the fixing assembly (6) also includes a precision screw (63) threadedly mounted on the end of the mounting rod (12); the precision screw (63) simultaneously passes through the positioning pin (61) and the mounting rod (12); and the axis of the precision screw (63) is perpendicular to the positioning pin (61).

6. The apparatus for high-precision patterning of BC batteries according to claim 1, characterized in that: The sides of the platform (4) are all installed with limiting members (41) for limiting the position of the battery slice (5); the limiting members (41) each comprise an abutting portion (411) and a mounting portion (412); the mounting portion (412) is mounted on the side wall of the platform (4); the abutting portion (411) is perpendicular to the mounting portion (412) and extends upward; the abutting portion (411) abuts against the side of the battery slice (5).

7. The apparatus for high-precision patterning of BC batteries according to claim 6, characterized in that: The mounting portion (412) is slidably connected to the platform (4), and the side walls of the platform (4) are each provided with a mounting groove (42). One end of the mounting portion (412) away from the abutting portion (411) is plugged into the mounting groove (42), and the length direction of the mounting groove (42) is perpendicular to the center of the platform (4). A tension spring (43) is fixed in the mounting groove (42), and one end of the tension spring (43) is fixed to the inner wall of the mounting groove (42), and the other end is fixedly connected to one end of the mounting portion (412) away from the abutting portion (411).

8. The apparatus for high-precision patterning of BC batteries according to claim 7, characterized in that: The platform (4) is further provided with a slide groove (44) which is in communication with the mounting groove (42). The length direction of the slide groove (44) is parallel to the mounting groove (42), and the length of the slide groove (44) is smaller than that of the mounting groove (42). A slider (413) is fixed to the end of the mounting portion (412) close to the spring, and the slider (413) is slidably connected to the slide groove (44).

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