A battery piece glue printing device and a glue printing method

Abstract

The application relates to the technical field of battery piece glue printing, and discloses a battery piece glue printing device and a glue printing method. The battery piece glue printing device comprises a glue printing platform, a silk screen glue printing machine, a turnover mechanism and a carrying mechanism. The glue printing platform comprises two groups of platform modules. The platform module comprises a first X-axis moving module, a first Z-axis lifting module and a platform base. The platform bases in the two groups of platform modules can both realize the conveying of battery pieces to the position of the silk screen glue printing machine. The Z-axis lifting module is used for adjusting the height of the platform base. Through the arrangement of the glue printing platform, the silk screen glue printing machine, the turnover mechanism and the carrying mechanism, the double-side glue printing of the battery piece is realized. The silk screen glue printing machine realizes efficient and accurate glue printing, the glue application step on the battery piece is more efficient, the whole position mechanism is matched, the accuracy of the glue point position on the battery piece is ensured, the glue printing platform is provided with two platform modules, the platform modules can alternately and circularly convey the battery pieces, and the efficiency of the glue printing process is further improved.

Description

Technical Field

[0001] This invention relates to the field of battery cell printing technology, specifically to a battery cell printing apparatus and printing method. Background Technology

[0002] Currently, most battery string production methods involve applying flux to photovoltaic cells or solder ribbons, then welding the solder ribbons and silver paste on the photovoltaic cells at high temperatures to connect the cells in series. The main drawback of this method is that photovoltaic cells are becoming increasingly larger and thinner, with denser grid lines and finer solder ribbons. High-temperature welding using traditional solder ribbons and cells easily leads to cell breakage, resulting in a higher breakage rate. The increasing size of photovoltaic cells and the number of main grid lines increase the cost of silver paste. Furthermore, the increased area covered by silver paste reduces the light-receiving area of ​​the cell, decreasing the module's power generation efficiency. Therefore, a gridless battery cell has emerged. This type of cell only has fine grid lines on its surface, eliminating main grid lines on the front and back. This increases the effective photoelectric conversion area, reduces silver paste loss, and achieves cost reduction and efficiency improvement. Currently, the common process for fabricating gridless solar cells into strings involves welding the solder strip to the solar cell and fixing it with UV adhesive. However, the application of UV adhesive to the solar cell is currently done by dispensing, which has the problem of low efficiency. In order to address the above problems, this application is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a battery cell printing apparatus and printing method to overcome the problem of low printing efficiency on battery cells at present.

[0004] The present invention is achieved through the following technical solution.

[0005] This invention discloses a battery cell printing apparatus, comprising a printing platform, a screen printing machine, a flipping mechanism, and a conveying mechanism. The printing platform includes two platform modules, each comprising a first X-axis moving module, a first Z-axis lifting module, and a platform base. The platform bases in both modules are capable of transporting the battery cell to the screen printing machine. The first Z-axis lifting module is used to adjust the height of the platform base to avoid collisions between the two platform bases. The screen printing machine includes a second X-axis moving module, a printing squeegee assembly, and a battery cell screen. The printing squeegee assembly is connected to the second X-axis moving module. The flipping mechanism includes a flipping drive and a flipping bracket, the latter connected to the drive and equipped with a suction cup. The conveying mechanism is used to transport the flipped battery cell to the printing platform for reverse printing on the front side.

[0006] Furthermore, both the printing platform and the screen printing machine are provided in two sets, which are used to print adhesive on the front and back sides of the battery cells, respectively.

[0007] Furthermore, the battery cell printing device also includes a positioning mechanism, which includes an adsorption base plate and positioning components. The adsorption base plate is provided with a positioning area, and the positioning area is provided with positioning battery cell adsorption holes. At least four sets of positioning components are arranged around the positioning area, which are used to perform positioning operations on the four sides of the battery cell. The positioning components include a driving mechanism and a positioning action part. After the battery cell is flipped by the flipping mechanism, it is placed in the positioning area. The driving mechanism drives the positioning action part to position the battery cell.

[0008] Furthermore, the alignment action unit includes an alignment base and an alignment plate, the alignment plate being movably mounted on the alignment base, and the alignment base being connected to the drive mechanism.

[0009] Furthermore, the printing squeegee assembly includes two sets of inclined squeegees, and the two sets of squeegees are respectively connected to the squeegee lifting assembly.

[0010] Furthermore, the two sets of printing platforms are arranged horizontally or vertically in space.

[0011] Furthermore, the platform base is provided with printing adhesive battery cell adsorption holes.

[0012] Furthermore, the screen printing machine also includes a second Z-axis lifting module.

[0013] A method for printing adhesive onto battery cells, based on the aforementioned battery cell adhesive printing apparatus, includes the following steps:

[0014] Place the solar cell on the platform base, move the platform base to the printing position of the screen printing machine, adjust the distance between the solar cell and the solar cell screen to the set distance, and the printing squeegee assembly moves on the solar cell screen to achieve printing on one side.

[0015] After printing, the platform base moves out of the printing position to the flipping position, and the other platform base moves to the printing position to perform printing.

[0016] The flipping mechanism flips the printed battery cells, and the transport mechanism transports the flipped battery cells to the platform base for the other side printing step.

[0017] Furthermore, during the movement of the printing squeegee assembly, the printing squeegee assembly performs at least one cycle of left and right movement. When moving to the left, the squeegee tilted to the left descends and operates; when moving to the right, the squeegee tilted to the right descends and operates.

[0018] The beneficial effects of this invention are:

[0019] By setting up an adhesive printing platform, a screen printing machine, a flipping mechanism, and a conveying mechanism, double-sided adhesive printing on the solar cells is achieved. The screen printing machine enables high-efficiency and precise adhesive printing, making the adhesive application process on the solar cells more efficient. In conjunction with the alignment mechanism, the accuracy of the adhesive dots on the solar cells is ensured. Furthermore, the adhesive printing platform is equipped with two platform modules that can alternately and cyclically transport the solar cells, further improving the efficiency of the adhesive printing process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of the battery cell printing device.

[0023] Figure 2 This is a schematic diagram of a screen printing adhesive machine;

[0024] Figure 3 This is a schematic diagram of the printing platform.

[0025] Figure 4 This is a schematic diagram of the flipping mechanism and the alignment mechanism;

[0026] Figure 5 This is a schematic diagram of the integral mechanism. Detailed Implementation

[0027] The following is combined Figure 1-5 The present invention will be described in detail below.

[0028] Example 1:

[0029] The present invention provides a battery cell printing apparatus, such as... Figure 1 The system includes an adhesive printing platform, a screen printing machine, a flipping mechanism 300, and a conveying mechanism 700. Two sets of adhesive printing platforms and two sets of screen printing machines are provided for printing adhesive on the front and back sides of the battery cells. These are adhesive printing platform 100 and adhesive printing platform 200, screen printing machine 200 and screen printing machine 200, respectively. The adhesive printing platforms 100 and 200 can be arranged horizontally or vertically in space. In this embodiment, they are arranged horizontally in sequence; in other embodiments, they can also be arranged vertically in sequence.

[0030] like Figure 3 Each printing platform includes two platform modules. Each platform module includes a first X-axis moving module 101, a first Z-axis lifting module 102, and a platform base 103. The platform base 103 is provided with printing cell adsorption holes. The two platform modules are arranged opposite each other. The first X-axis moving module 101 is used to drive the platform base 103 to translate. The Z-axis lifting module 102 is used to adjust the height of the platform base 103. The platform base 103 in both platform modules can transport the cells to the screen printing machine position. Adjusting the height can avoid the two platform bases 103 when they meet, thereby realizing the rapid switching of cells at the printing position and improving efficiency.

[0031] like Figure 2 The screen printing machine includes a fixed base 202, a second X-axis moving module 201, a printing squeegee assembly 203, and a battery cell screen 205. The battery cell screen 205 is mounted on a screen mounting frame 204. The printing squeegee assembly 203 is connected to the second X-axis moving module 201. After the battery cell moves to the underside of the battery cell screen 205, the Z-axis lifting module 102 adjusts the height of the platform base 103 so that the battery cell moves to a designated position under the battery cell screen 205.

[0032] like Figure 4 The flipping mechanism 300 includes a flipping drive 301 and a flipping bracket 303. The flipping bracket 303 is connected to the flipping drive 301, and a suction cup 304 is provided on the flipping bracket 303. Specifically, the flipping drive 301 is a flipping drive motor, which is connected to a reducer 302. The flipping bracket 303 is connected to the output shaft of the reducer 302 through a rotating frame 305. The conveying mechanism 700 (not shown in the figure) Figure 1 The mechanism marked at position 700 (usually includes a dual-axis or tri-axis moving module and a suction cup module) is used to transport the flipped battery cell to the printing platform to achieve reverse printing on the front side.

[0033] Preferably, the battery cell printing apparatus further includes an alignment mechanism 400, such as... Figure 1 , Figure 4 , Figure 5The alignment mechanism 400 includes an adsorption base plate 402 and an alignment component. The adsorption base plate 402 has an alignment zone 403 and a clearance groove for the entry and exit of the flipping bracket 303, allowing the solar cells to be placed on the adsorption base plate 402. Multiple alignment zones 403 can be provided, generally the same number as the number of solar cells that the platform base 103 can hold. The alignment zone 403 has solar cell adsorption holes 404, which are connected to the vacuum generator pipeline. At least four alignment components are arranged around zone 403, which are used to perform alignment operations on the four sides of the battery cell. The alignment components include a drive mechanism 406 and an alignment action unit. The drive mechanism 406 can use a component capable of telescopic movement, such as a cylinder, a gripper, or a hydraulic cylinder. After the battery cell is flipped by the flipping mechanism 300, it is placed in the alignment zone 403. The drive mechanism 406 drives the alignment action unit to align the battery cell. The transport mechanism 700 transports the flipped and aligned battery cell to the printing platform to ensure the accuracy of the printing position.

[0034] Optionally, the alignment action unit includes an alignment base 401 and an alignment plate 405. The alignment plate 405 is movably mounted on the alignment base 401. The alignment base 401 is connected to the drive mechanism 406. Specifically, the alignment base 401 is equipped with an adjusting bolt 406 for adjusting the position of the alignment plate 405, so that the position of the alignment plate 405 is adjustable to ensure accuracy and adaptability. The alignment plate 405 is equipped with an alignment wheel 407 that contacts the battery cells during alignment.

[0035] Preferably, such as Figure 2 The printing squeegee assembly 203 includes two sets of squeegees 206 with different tilt directions, and the two sets of squeegees 206 are respectively connected to the squeegee lifting assembly 207.

[0036] Both the platform base 103 and the adsorption base plate 402 are equipped with structures to avoid adhesive dots. These structures can be raised, recessed, hollowed out, or perforated, etc., so that the printed battery cells can avoid adhesive dots when placed on the platform, thus preventing the adhesive from being scratched.

[0037] Example 2: Based on Example 1, the screen printing machine also includes a second Z-axis lifting module, which allows the screen printing machine and the battery cell to move relative to each other during the printing process, thus achieving efficient printing operation.

[0038] Example 3: Unlike Example 1 or Example 2, this example only sets up one printing platform and screen printing machine. After printing on one side of the battery cell, it is flipped and repositioned, and the transport mechanism places the battery cell back on the platform base 103 for printing on the other side.

[0039] A method for printing adhesive onto battery cells, based on the battery cell adhesive printing apparatus in Embodiment 1 or 2 above, includes the following steps:

[0040] The photovoltaic cells are transported to the platform base 103 on the printing platform 100 by the transport mechanism of the previous process. The platform base 103 holds the cells. The first X-axis moving module 101 drives the platform base 103 to move to the underside of the cell screen 205. The Z-axis lifting module 102 drives the platform base 103 to rise through the servo motor, so that the photovoltaic cells are attached to the cell screen 205. The left scraper lifting assembly 207 makes the left scraper 206 attach to the cell screen 205, and the right scraper is lifted. The motor in the second X-axis moving module 201 drives the left scraper 206 to move to the right. After moving to the end point, the left scraper is lifted, and the right scraper is lowered and moves to the left. Through the above cycle, the UV adhesive in the cell screen 205 is printed onto the cells through the screen.

[0041] While the above actions are being performed, another platform base 103 is lowered to a certain height to wait for the next round of battery cell placement. After the battery cell is placed, it reaches below the platform base 103 that is currently printing adhesive. After the battery cell on the previous platform base 103 is printed with adhesive, it continues to move to the right, moving out of the printing position to the flipping position, and waits for the flipping action. The platform base 103 with unprinted battery cells is then raised to print adhesive.

[0042] The flipping mechanism 300 flips the printed battery cell and places it on the adsorption base plate 402 for positioning. The platform base 103 returns to its initial position to await the placement of the next battery cell. After the positioning base 401 and positioning plate 405 move closer to the battery cell for positioning, they return and are released. The transport mechanism 700 transports the flipped battery cell to the platform base 103 of another printing platform for the other side printing step, which is the same as the previous side printing step, thus achieving double-sided printing. After the transport mechanism 700 transports the flipped battery cell, the flipping mechanism 300 resets.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A battery cell printing apparatus, characterized in that: The system includes a printing platform, a screen printing machine, a flipping mechanism (300), and a conveying mechanism (700). The printing platform comprises two platform modules, each including a first X-axis moving module (101), a first Z-axis lifting module (102), and a platform base (103). The platform bases (103) in both modules can transport the battery cells to the screen printing machine. The first Z-axis lifting module (102) adjusts the height of the platform base (103), allowing for avoidance when the two platform bases (103) intersect. The screen printing machine includes a second X-axis moving module (201), a printing squeegee assembly (203), and a battery cell screen (205). The printing squeegee assembly (203) is connected to the second X-axis moving module (201). The flipping mechanism (300) includes a flipping drive (301) and a flipping bracket (303). The flipping bracket (303) is connected to the flipping drive (301). A suction cup (304) is provided on the flipping bracket (303). The conveying mechanism (700) is used to convey the flipped battery cell to the printing platform to achieve reverse printing on the front side. The battery cell printing device further includes a positioning mechanism (400), which includes an adsorption base plate (402) and positioning components. The adsorption base plate (402) is provided with a positioning area (403), and the positioning area (403) is provided with positioning battery cell adsorption holes (404). At least four sets of positioning components are provided around the positioning area (403) for positioning the four sides of the battery cell. The positioning components include a driving mechanism (406) and a positioning action part. After the battery cell is flipped by the flipping mechanism (300), it is placed in the positioning area (403). The driving mechanism (406) drives the positioning action part to position the battery cell. The alignment action unit includes an alignment base (401) and an alignment plate (405). The alignment plate (405) is movably mounted on the alignment base (401), and the alignment base (401) is connected to the drive mechanism (406).

2. The battery cell printing apparatus according to claim 1, characterized in that: The printing platform and screen printing machine are each equipped with two sets, which are used to print adhesive on the front and back of the battery cells respectively.

3. The battery cell printing apparatus according to claim 1 or 2, characterized in that: The printing squeegee assembly (203) includes two sets of inclined squeegees (206), and the two sets of squeegees (206) are respectively connected to the squeegee lifting assembly (207).

4. The battery cell printing apparatus according to claim 3, characterized in that: The two sets of printing platforms are arranged horizontally or vertically in space.

5. The battery cell printing apparatus according to claim 3, characterized in that: The platform base (103) is provided with printing adhesive battery cell adsorption holes.

6. The battery cell printing apparatus according to claim 3, characterized in that: The screen printing machine also includes a second Z-axis lifting module.

7. A method for printing adhesive onto battery cells, based on the battery cell printing adhesive apparatus according to any one of claims 1-6, characterized in that; Includes the following steps: The battery cell is placed on the platform base (103), and the platform base (103) moves to the printing position of the screen printing machine. The distance between the battery cell and the battery cell screen (205) is adjusted to the set distance. The printing squeegee assembly (203) moves on the battery cell screen (205) to achieve printing on one side. After printing, the platform base (103) moves out of the printing position to the flip position, and the other platform base (103) moves to the printing position to print. The flipping mechanism (300) flips the printed battery cell, and the transport mechanism (700) transports the flipped battery cell to the platform base (103) for the other side printing step.

8. The battery cell printing method according to claim 7, characterized in that: During the movement of the printing squeegee assembly (203), the printing squeegee assembly (203) performs at least one cycle of left and right movement. When moving to the left, the squeegee (206) tilted to the left descends and works. When moving to the right, the squeegee (206) tilted to the right descends and works.

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