Low-silver metallization-containing slurry preparation device applied to photovoltaic heterojunction cell

Abstract

The utility model discloses a low-silver metallization-containing slurry preparation device applied to a photovoltaic heterojunction cell. The low-silver metallization-containing slurry preparation device comprises a supporting frame and a stirring device, the stirring device is rotatably arranged on the supporting frame, the stirring device comprises a stirring barrel body and a stirring rod, one end of the stirring rod is detachably connected with the supporting frame, the other end of the stirring rod is located in the stirring barrel body, the stirring rod is provided with at least one scraping mechanism, and when the stirring barrel body rotates, the scraping mechanism is located in the stirring barrel body. The scraping mechanism can be used for scraping slurry adhered to the inner wall of the stirring barrel body. According to the utility model, slurry is prevented from remaining on the inner wall of the stirring device, and the quality of photovoltaic silver slurry processed next time is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of silver paste preparation, in particular to a low-silver-containing metallization paste preparation device applied to photovoltaic heterojunction cells. Background Art

[0002] Silver paste is a low-silver metallization paste. Silver paste is a functional material based on silver powder, glass oxide and organic resin. Functionally, it is divided into conductive silver paste, resistive silver paste and electro-melting silver paste. Conductive silver paste accounts for 90% of the market. Photovoltaic silver paste is the main demand area for silver paste, accounting for 87% of the demand for silver paste. In the process of preparing photovoltaic silver paste, it is necessary to go through the processes of batching, mixing, grinding, filtering, screening, testing, storage, etc.

[0003] Silver paste plays an important conductive role as an electrode material in the battery cell. Its performance is directly related to the photoelectric performance of the photovoltaic cell. After the mixing and stirring is completed, it will be temporarily stored in a stirring device when entering the next process. The stirring device is equipped with a corresponding stirring mechanism to prevent condensation inside it, which will affect the quality of the slurry. After the existing photovoltaic silver paste stirring device has been used and stored for a long time, a lot of viscous slurry will remain on its inner wall, which will affect the quality of the photovoltaic silver paste in the next processing.

[0004] Therefore, it is necessary to provide a device for preparing low-silver-containing metallization slurry for use in photovoltaic heterojunction cells. Utility Model Content

[0005] In order to overcome the above shortcomings, the purpose of the utility model is to provide a low-silver metallization slurry preparation device for photovoltaic heterojunction cells, so as to avoid the slurry remaining on the inner wall of the stirring device and avoid affecting the quality of the photovoltaic silver paste in the next processing.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a low-silver metallization slurry preparation device for photovoltaic heterojunction cells, including a support frame and a stirring device; the stirring device is rotatably arranged on the support frame, the stirring device includes a stirring barrel body and a stirring rod, one end of the stirring rod is detachably connected to the support frame, and the other end is located in the stirring barrel body, and at least one group of scraping mechanisms is arranged on the stirring rod, and when the stirring barrel body rotates, the scraping mechanism can scrape off the sticky slurry on the inner wall of the stirring barrel body.

[0007] Furthermore, the stirring device includes a stirring barrel cover, which is movably connected to the stirring barrel body, and a plurality of stirring blades are arranged on the stirring rod along its length direction, and one end of the stirring rod is detachably connected to the support frame through a fixing member. The stirring barrel body and the stirring barrel cover can be connected by a hinge, and the stirring barrel cover can also be directly covered on the stirring barrel body, so that the barrel cover can be opened to repair or replace the stirring rod.

[0008] Furthermore, the fixing member is provided with a fixing groove for inserting the stirring rod along its height direction, and an anti-drop mechanism is symmetrically provided on both sides of the fixing groove. It should be noted that the fixing groove and the stirring rod are interference fit, which can ensure that the stirring rod will not be offset after being inserted.

[0009] Furthermore, the anti-drop mechanism includes a clamping spring, the clamping spring is located in the spring installation groove, and one end of the clamping spring away from the wall of the spring installation groove is connected to a clamping block, and the fixing member is provided with a guide groove for the clamping block to move. The clamping block can clamp the stirring rod from both sides under the elastic force of the clamping spring, further limiting the movement of the stirring rod in the horizontal, vertical or circumferential direction. The stirring rod can stir the slurry in the barrel only by rotating the stirring barrel body.

[0010] Furthermore, the scraping mechanism includes a scraper arranged along the height direction of the mixing barrel, one side of the scraper abuts against the inner wall of the mixing barrel, and the other side is connected to the mixing rod through a connecting rod. The scraper matches the height of the mixing barrel, and the mixing barrel can rotate as a whole, so only one scraper is provided to scrape off the slurry on the inner wall of the mixing barrel.

[0011] Furthermore, a connecting seat is provided at the bottom of the mixing barrel body, and the connecting seat is movably connected to the annular fixing seat on the support frame through a connecting bearing. By providing the connecting bearing and the annular fixing seat, the connecting seat can drive the mixing barrel body to rotate.

[0012] Furthermore, it also includes a rotating gear and a driving member driving the rotating gear, and the bottom surface of the mixing barrel body is provided with a gear along its edge, and the gear meshes with the rotating gear. The driving member drives the rotating gear to rotate, so that the gear meshed with the rotating gear can drive the entire mixing barrel body to rotate, thereby achieving the stirring of the internal stirring rod and the scraper to scrape off the sticky slurry on the inner wall of the barrel body.

[0013] Furthermore, a feed hopper is arranged on the top of the mixing barrel body, and a handle and a discharge port are arranged on the side of the mixing barrel body.

[0014] Beneficial effects of the utility model:

[0015] In the utility model, the stirring device, the support frame and the scraping mechanism cooperate with each other, the stirring barrel body can rotate on the support frame, the stirring rod and the support frame have an interference fit, and can maintain the position without changing during the rotation of the stirring barrel body. At this time, the stirring blades located in the stirring barrel body can stir the slurry to avoid the phenomenon of slurry coagulation and ensure the quality of the silver paste; the stirring rod is provided with a scraping mechanism, and the scraper on the scraping mechanism can scrape off the residual material on the inner wall of the slurry after the slurry is output from the stirring barrel body. On the one hand, it can prevent the slurry from remaining on the inner wall of the stirring device and avoid affecting the quality of the photovoltaic silver paste processed next time. On the other hand, it can also reduce the waste of slurry and save the production cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an isometric view of the overall structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of a stirring device according to an embodiment of the present utility model;

[0018] Figure 3 for Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0019] Figure 4 It is a partial structural schematic diagram of an embodiment of the utility model;

[0020] In the figure: 1. support frame; 2. stirring device; 21. stirring barrel body; 22. stirring barrel cover; 23. stirring rod; 24. stirring blade; 3. connecting rod; 4. scraping mechanism; 41. scraper; 5. fixing part; 51. fixing groove; 52. anti-drop mechanism; 521. clamping block; 522. clamping spring; 523. spring mounting groove; 524. guide groove; 6. gear condition; 7. annular fixing seat; 8. connecting bearing; 9. connecting seat; 10. connecting block; 11. rotating gear; 12. driving part; 13. handle; 14. feed hopper; 15. discharge port. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] See attached Figures 1 to 4As shown, a low-silver-containing metallization slurry preparation device for photovoltaic heterojunction cells in this embodiment includes a support frame 1 and a stirring device 2; the stirring device 2 is rotatably arranged on the support frame 1, and the stirring device 2 includes a stirring barrel body 21 and a stirring rod 23, one end of the stirring rod 23 is detachably connected to the support frame 1, and the other end is located in the stirring barrel body 21, and at least one group of scraping mechanisms 4 is arranged on the stirring rod 23, and when the stirring barrel body 21 rotates, the scraping mechanism 4 can scrape off the slurry sticking to the inner wall of the stirring barrel body 21.

[0023] The stirring device 2, the support frame 1 and the scraping mechanism 4 cooperate with each other, the stirring barrel body 21 can rotate on the support frame 1, and the stirring rod 23 is interference fit with the support frame 1, and can maintain its position without changing during the rotation of the stirring barrel body 21. At this time, the stirring blade 24 located in the stirring barrel body 21 can stir the slurry to avoid the phenomenon of slurry coagulation and ensure the quality of the silver paste; the stirring rod 23 is provided with a scraping mechanism 4, and the scraper 41 on the scraping mechanism 4 can scrape off the residual material on the inner wall of the slurry after the slurry is output from the stirring barrel body 21. On the one hand, it can prevent the slurry from remaining on the inner wall of the stirring device 2, thereby avoiding affecting the quality of the photovoltaic silver paste processed next time. On the other hand, it can also reduce the waste of slurry and save the production cost of the enterprise.

[0024] The stirring device 2 includes a stirring barrel cover 22, which is movably connected to the stirring barrel body 21, and a plurality of stirring blades 24 are arranged on the stirring rod 23 along its length direction, and one end of the stirring rod 23 is detachably connected to the support frame 1 through a fixing member 5. The stirring barrel body 21 and the stirring barrel cover 22 can be connected by a hinge, and the stirring barrel cover 22 can also be directly covered on the stirring barrel body 21, so as to facilitate opening the barrel cover to repair or replace the stirring rod 23. It should be noted that the hinge can be a hinge or a hinged seat. The stirring blades 24 stir the slurry inside the stirring barrel body 21 during its rotation to avoid the slurry from coagulating. The stirring rod 23 is detachable, which is convenient for removing the stirring rod 23 for cleaning, maintenance or replacement at any time.

[0025] The fixing member 5 is provided with a fixing groove 51 for inserting the stirring rod 23 along its height direction, and an anti-drop mechanism 52 is symmetrically provided on both sides of the fixing groove 51. It should be noted that the fixing groove 51 and the stirring rod 23 are interference-fitted, which can ensure that the stirring rod 23 will not be offset after being inserted.

[0026] The anti-drop mechanism 52 includes a clamping spring 522, which is located in a spring installation groove 523, and one end of the clamping spring 522 away from the groove wall of the spring installation groove 523 is connected to a clamping block 521. The fixing member 5 is provided with a guide groove 524 for the clamping block 521 to move. The clamping block 521 can clamp the stirring rod 23 from both sides under the elastic force of the clamping spring 522, further limiting the movement of the stirring rod 23 in the horizontal, vertical or circumferential direction. The stirring rod 23 can stir the slurry in the barrel only by rotating the stirring barrel body 21.

[0027] The scraping mechanism 4 includes a scraper 41 arranged along the height direction of the mixing barrel body 21, one side of the scraper 41 abuts against the inner wall of the mixing barrel body 21, and the other side is connected to the mixing rod 23 through the connecting rod 3. The scraper 41 matches the height of the mixing barrel body 21, and the mixing barrel body 21 can rotate as a whole, so only one scraper 41 is provided to scrape off the slurry on the inner wall of the mixing barrel body 21. It should be noted that the number of scrapers 41 is not limited. When two or three scrapers 41 are provided, the scraping efficiency can be correspondingly improved while scraping off the slurry.

[0028] A connecting seat 9 is provided at the bottom of the mixing barrel body 21, and the connecting seat 9 is movably connected to the annular fixing seat 7 on the support frame 1 through a connecting bearing 8. By providing the connecting bearing 8 and the annular fixing seat 7, the connecting seat 9 can drive the mixing barrel body 21 to rotate.

[0029] It also includes a rotating gear 11 and a driving member 12 that drives it to rotate. The bottom surface of the mixing barrel body 21 is provided with a gear condition 6 along its edge, and the gear condition 6 is meshed with the rotating gear 11. The driving member 12 drives the rotating gear 11 to rotate, so that the gear condition 6 meshing with the rotating gear 11 can drive the entire mixing barrel body 21 to rotate, thereby achieving the stirring of the internal stirring rod 23 and the scraping of the sticky slurry on the inner wall of the barrel body by the scraper 41. In some embodiments, the rotating gear 11 is connected to the annular fixing seat 7 through the connecting block 10. It should be noted that the specific structure of the driving member 12 is not limited. It can be a driving motor or a driving screw that can rotate the rotating gear 11, as long as it can drive it to rotate.

[0030] A feed hopper 14 is disposed on the top of the mixing barrel body 21 , and a handle 13 and a discharge port 15 are disposed on the side of the mixing barrel body 21 .

[0031] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for preparing low-silver metallization slurry for photovoltaic heterojunction cells, characterized in that: It includes a supporting frame and a stirring device; the stirring device is rotatably arranged on the supporting frame, the stirring device includes a stirring barrel body and a stirring rod, one end of the stirring rod is detachably connected to the supporting frame, and the other end is located in the stirring barrel body, at least one set of scraping mechanisms is arranged on the stirring rod, and when the stirring barrel body rotates, the scraping mechanism can scrape off the sticky slurry on the inner wall of the stirring barrel body.

2. The device for preparing low-silver metallization slurry for photovoltaic heterojunction cells according to claim 1, characterized in that: The stirring device comprises a stirring barrel cover, which is movably connected to the stirring barrel body. A plurality of stirring blades are arranged on the stirring rod along its length direction. One end of the stirring rod is detachably connected to a supporting frame through a fixing piece.

3. The low silver-containing metallization slurry preparation device for photovoltaic heterojunction cells according to claim 2, characterized in that: The fixing piece is provided with a fixing groove for inserting the stirring rod along its height direction, and an anti-drop mechanism is symmetrically provided on both sides of the fixing groove.

4. The device for preparing low silver-containing metallization slurry for photovoltaic heterojunction cells according to claim 3, characterized in that: The anti-drop mechanism comprises a clamping spring, which is located in the spring installation groove, and one end of the clamping spring away from the wall of the spring installation groove is connected to a clamping block, and the fixing member is provided with a guide groove for the clamping block to move.

5. The device for preparing low silver-containing metallization slurry for photovoltaic heterojunction cells according to claim 1, characterized in that: The scraping mechanism comprises a scraper arranged along the height direction of the stirring barrel body, one side of the scraper abuts against the inner wall of the stirring barrel body, and the other side is connected to the stirring rod through a connecting rod.

6. The device for preparing low silver-containing metallization slurry for photovoltaic heterojunction cells according to claim 1, characterized in that: A connecting seat is arranged at the bottom of the mixing barrel body, and the connecting seat is movably connected to an annular fixing seat on the supporting frame through a connecting bearing.

7. The device for preparing low silver-containing metallization slurry for photovoltaic heterojunction cells according to claim 6, characterized in that: It also includes a rotating gear and a driving member for driving the rotating gear. The bottom surface of the mixing barrel body is provided with a gear condition along its edge, and the gear condition is meshed with the rotating gear.

8. The device for preparing low silver-containing metallization slurry for photovoltaic heterojunction cells according to claim 1, characterized in that: A feeding hopper is arranged on the top of the mixing barrel body, and a handle and a discharge port are arranged on the side of the mixing barrel body.

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