Gravure liquid injection equipment

Abstract

The utility model provides gravure liquid injection equipment, which belongs to the technical field of lithium batteries, and comprises a liquid storage tank, a lower gravure roller, a sealing shell, an upper gravure roller and a liquid supply assembly, the liquid storage tank is used for being arranged on a liquid injection coating station on a winding machine or a lamination machine; a lower gravure roller is rotationally connected to an opening in the top of the liquid storage tank, and a scraper close to the peripheral face of the lower gravure roller is arranged in the liquid storage tank. The sealing shell is arranged above the liquid storage tank and is provided with a lower opening; the upper gravure roller is rotationally connected with the bottom opening of the sealing shell, a pole piece penetrates through the space between the lower gravure roller and the upper gravure roller, and a gap for electrolyte to pass through is formed between the peripheral surface of the lower gravure roller and one side, facing the pole piece feeding direction, of the lower opening of the sealing shell; the liquid supply assembly is arranged between the liquid storage tank and the sealing shell. According to the utility model, the tedious degree of subsequent liquid injection into the battery shell can be reduced, the lithium battery production process is optimized, and the stability of the lithium battery production quality is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium batteries, and more specifically, it relates to a gravure liquid injection device. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. They include lithium-sulfur batteries, which are currently a hot research topic, and lithium-ion batteries, which are widely used. Both of these are composed of a positive electrode, a negative electrode, a separator, and an electrolyte.

[0003] In the lithium battery production process, the wound or stacked cells need to be installed into the battery case, and then the electrolyte is injected into the battery case. However, the electrolyte often appears in the cells and the cell material is not sufficiently or evenly impregnated, which affects the quality of lithium battery production. Summary of the Invention

[0004] The purpose of this invention is to provide a gravure injection device to solve the technical problem in the prior art where the electrolyte often appears in the cell, resulting in insufficient and uneven impregnation of the cell material, which affects the quality of lithium battery production.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A gravure printing liquid injection device is provided, comprising a liquid storage tank, a lower gravure roller, a sealing shell, an upper gravure roller, and a liquid supply assembly. The liquid storage tank is used to be installed at the liquid injection coating station on a winding machine or a stacking machine. The lower gravure roller is rotatably connected to the top opening of the liquid storage tank, and a scraper is provided inside the liquid storage tank near the outer circumferential surface of the lower gravure roller. The sealing shell is located above the liquid storage tank and has a lower opening. The upper gravure roller is rotatably connected to the bottom opening of the sealing shell. An electrode passes between the lower gravure roller and the upper gravure roller, and the outer circumferential surface of the lower gravure roller and the side of the lower opening of the sealing shell facing the electrode feeding direction have a gap for the electrolyte to pass through. The liquid supply assembly is located between the liquid storage tank and the sealing shell, and the liquid supply assembly is used to supply the electrolyte in the liquid storage tank into the sealing shell.

[0006] In one possible implementation, based on the above technical solutions, a liquid guide plate is provided at the top of the sealed shell, directly above the upper gravure roller, and a plurality of liquid guide plates are provided at the bottom of the liquid guide plate facing the grooves on the outer circumference of the lower gravure roller. The liquid supply assembly is used to draw the electrolyte in the storage tank onto the liquid guide plate.

[0007] In one possible implementation, based on the above technical solutions, a pressure roller parallel to the upper gravure roller is rotatably connected inside the sealing shell. The outer circumferential surface of the pressure roller abuts against the outer circumferential surface of the upper gravure roller. The pressure roller is located behind the liquid guide plate along the rotation direction of the upper gravure roller. The rotation direction of the pressure roller is opposite to that of the upper gravure roller. A drive motor for driving the pressure roller to rotate is provided on the outside of the sealing shell.

[0008] In one possible implementation, based on the above technical solutions, the liquid supply assembly includes a liquid supply pump, a liquid supply pipe, and a liquid distribution pipe. The liquid supply pump is connected to the outside of the liquid storage tank. One end of the liquid supply pipe is connected to the liquid supply pump, and the other end extends to the top of the sealed housing. The liquid distribution pipes are disposed inside the sealed housing and are all connected to the liquid supply pipes. The outlet end of each liquid distribution pipe faces the liquid guide plate above the corresponding liquid guide plate.

[0009] In one possible implementation, based on the above technical solutions, the gravure printing liquid injection device further includes a collection tank and a scraping mechanism. The collection tank is located below the lower opening of the sealing shell and the side of the upper gravure roller facing the electrode protrusion direction, and the upper gravure roller is in contact with the side of the lower opening of the sealing shell facing the electrode protrusion direction. The collection tank is inclined, and the bottom end of the collection tank is located directly above the position of the liquid storage tank before passing the electrode. The scraping mechanism is located at the bottom of the sealing shell and is used to scrape the electrolyte in the collection tank into the liquid storage tank.

[0010] In one possible implementation, based on the above technical solutions, the scraping mechanism includes a scraping screw, a smooth rod, a scraping motor, a threaded block, and a scraper. The scraping screw is rotatably connected below the sealing shell and parallel to the length direction of the collection tank; the smooth rod is fixed below the sealing shell and parallel to the scraping screw; the scraping motor is located below the sealing shell, and the output shaft of the scraping motor is coaxially fixed with the scraping screw; the threaded block is threadedly connected to the scraping screw and penetrated by the smooth rod; the scraper is located on the threaded block and is used to scrape the electrolyte in the collection tank.

[0011] In one possible implementation, based on the above technical solutions, the scraping mechanism further includes a rotating shaft, a linkage screw, and a one-way limiting component; the rotating shaft is rotatably connected to the threaded block, one end of the scraper is fixed to the rotating shaft, and the other end of the scraper is attached to the inner wall of the collection tank; the linkage screw has two ends located below the sealing shell, the linkage screw is parallel to the scraping screw, and the rotating shaft has threaded holes at both ends for the corresponding linkage screws to enter; the threaded block drives the rotating shaft to engage with the linkage screw at the bottom of the collection tank. When the rod is threaded, the scraper rotates upward to disengage from the collection groove; when the threaded block drives the rotating shaft to connect with the linkage screw at the top of the collection groove, the scraper rotates downward to re-enter the collection groove; the rotational friction between the rotating shaft and the threaded block is greater than the sum of the scraper's weight and the threaded friction between the rotating shaft and the linkage screw; there are two one-way limiting members and they are set at the corresponding linkage screws. The one-way limiting members are used to restrict the linkage screws to rotate only when the threads are screwed into the threaded hole of the rotating shaft.

[0012] In one possible implementation, based on the above technical solutions, the one-way limiting component is a one-way bearing, and the one-way limiting component is located at the rotational connection between the linkage screw and the bottom of the sealing shell.

[0013] The beneficial effects of the gravure coating equipment provided by this utility model are as follows: Compared with the prior art, when performing double-sided coating of the electrode sheet, the electrode sheet passes between the lower and upper gravure rollers. Parts of the outer circumferential surfaces of the lower and upper gravure rollers are immersed in the electrolyte in the storage tank and the sealed shell. The rotation of the lower and upper gravure rollers coats both sides of the electrode sheet with electrolyte. When the electrolyte in the sealed shell decreases, the electrolyte supply component draws electrolyte from the storage tank into the sealed shell. When the electrolyte in the storage tank decreases, the operator pours electrolyte back into the storage tank to maintain continuous operation, thus improving the overall efficiency of simultaneously coating both sides of the electrode sheet. This utility model can perform double-sided coating of the electrode sheet during the winding or stacking process, and by increasing the viscosity of the electrolyte with additives, the electrolyte can be coated more stably on the electrode sheet. This significantly reduces the cumbersome process of subsequent electrolyte injection into the battery casing, optimizes the lithium battery production process, and improves the stability of lithium battery production quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the process of applying this utility model embodiment in a stacking machine;

[0016] Figure 2 A schematic diagram of the gravure injection device provided in this embodiment of the utility model;

[0017] Figure 3 A cross-sectional view of the gravure injection device provided in an embodiment of this utility model;

[0018] Figure 4 Right view of the intaglio printing liquid injection device provided in an embodiment of this utility model;

[0019] Figure 5 This is a schematic diagram of the scraping mechanism provided in an embodiment of the present utility model.

[0020] The labels for the attached figures are as follows:

[0021] 1. Liquid storage tank; 11. Scraper;

[0022] 2. Lower gravure roller;

[0023] 3. Sealing shell; 31. Liquid guide plate; 32. Liquid guide sheet; 33. Pressure roller; 34. Drive motor;

[0024] 4. Upper gravure roller;

[0025] 5. Liquid supply assembly; 51. Liquid supply pump; 52. Liquid supply pipe; 53. Distributor pipe;

[0026] 6. Collection tank;

[0027] 7. Scraping mechanism; 71. Scraping screw; 72. Polished rod; 73. Scraping motor; 74. Threaded block; 75. Scraper; 76. Rotating shaft; 761. Threaded hole; 77. Linkage screw; 78. One-way limiting component;

[0028] 8. Battery positive electrode plate; 9. Battery negative electrode plate; 10. Separator. Detailed Implementation

[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be further explained that the accompanying drawings and embodiments of this utility model mainly describe the concept of this utility model. Based on this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this utility model, they can implement the above-mentioned specific forms and settings in a well-known manner.

[0031] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] The directional terms "inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] The present invention will now describe a gravure printing liquid injection device.

[0035] like Figure 1 and Figure 2As shown, one embodiment of this utility model provides a gravure printing liquid injection device, including a liquid storage tank 1, a lower gravure roller 2, a sealing shell 3, an upper gravure roller 4, and a liquid supply assembly 5. The liquid storage tank 1 is used to be installed at the liquid injection coating station on a winding machine or a stacking machine. The lower gravure roller 2 is rotatably connected to the top opening of the liquid storage tank 1, and a scraper 11 is provided in the liquid storage tank 1 near the outer peripheral surface of the lower gravure roller 2. The sealing shell 3 is located above the liquid storage tank 1 and has a lower opening. The upper gravure roller 4 is rotatably connected to the bottom opening of the sealing shell 3. An electrode passes through the lower gravure roller 2 and the upper gravure roller 4. The outer peripheral surface of the lower gravure roller 2 and the side of the lower opening of the sealing shell 3 facing the electrode feeding direction have a gap for the electrolyte to pass through. The liquid supply assembly 5 is located between the liquid storage tank 1 and the sealing shell 3, and the liquid supply assembly 5 is used to supply the electrolyte in the liquid storage tank 1 into the sealing shell 3.

[0036] A lithium battery winding machine is a specialized piece of equipment used in lithium battery production. Its core function is to assemble the positive electrode 8, negative electrode 9, and separator 10 into a core pack through continuous rotation, thereby forming a lithium battery cell. A lithium battery stacking machine is a specialized piece of equipment used in the manufacture of lithium-ion batteries. It is mainly used to precisely stack the positive electrode 8, negative electrode 9, and separator 10 in a specific order and number of layers to form a battery cell.

[0037] When using, follow these steps: S1. Add additives to the electrolyte in advance to increase the electrolyte viscosity to above 4000 Pa·s; S2. Add two electrolyte injection and coating stations to the winding machine or stacking machine, and set up gravure injection equipment at the corresponding stations for coating the positive or negative electrode sheets with electrode liquid; S3. The positive and negative electrode sheets are coated on both sides using the corresponding gravure injection equipment; S4. After coating, the electrode sheets are wound or stacked. Specifically, the additive is 5%-10% of PVDF powder in the original electrolyte formula.

[0038] This embodiment provides a gravure printing liquid injection device. Compared with the prior art, when performing double-sided coating of the electrode sheet, the electrode sheet passes between the lower gravure roller 2 and the upper gravure roller 4. Parts of the outer peripheral surfaces of the lower gravure roller 2 and the upper gravure roller 4 are immersed in the electrolyte in the storage tank 1 and the sealing shell 3. The rotation of the lower gravure roller 2 and the upper gravure roller 4 coats both sides of the electrode sheet with electrolyte. When the electrolyte in the sealing shell 3 decreases, the liquid supply component 5 draws the electrolyte in the storage tank 1 into the sealing shell 3. When the electrolyte in the storage tank 1 decreases, the operator pours electrolyte into the storage tank 1 to maintain the continuity of the operation. Overall, this improves the efficiency of simultaneously coating both sides of the electrode sheet.

[0039] It can coat the electrodes on both sides during the winding or stacking process, and increase the viscosity of the electrolyte by adding additives, so that the electrolyte can be coated on the electrodes more stably. This greatly reduces the cumbersome process of subsequent electrolyte injection into the battery case, optimizes the lithium battery production process, and improves the stability of lithium battery production quality.

[0040] like Figure 3 As shown, based on the above embodiments, this utility model provides another specific embodiment as follows:

[0041] The top of the sealed housing 3 is provided with a liquid guide plate 31 located directly above the upper gravure roller 4. The bottom of the liquid guide plate 31 is provided with multiple liquid guide pieces 32 facing the grooves on the outer periphery of the lower gravure roller 2. The liquid supply assembly 5 is used to draw the electrolyte in the liquid storage tank 1 onto the liquid guide plate 31.

[0042] The electrolyte supply assembly 5 continuously and slowly delivers electrolyte into the sealing shell 3 and sends the electrolyte to the guide plate 31. The electrolyte on the guide plate 31 flows downward through each guide plate 32 into the grooves on the outer periphery of the rotating upper gravure roller 4. After the grooves are filled with electrolyte, the roller rotates back into the electrolyte. This minimizes the possibility of air bubbles remaining in the grooves on the outer periphery of the upper gravure roller 4 after it has rotated in the electrolyte inside the sealing shell 3, thus improving the coating quality of the electrode sheet.

[0043] like Figures 2 to 3 As shown, based on the above embodiments, this utility model provides another specific embodiment as follows:

[0044] Inside the sealing shell 3, a pressure roller 33 parallel to the upper gravure roller 4 is rotatably connected. The outer circumferential surface of the pressure roller 33 abuts against the outer circumferential surface of the upper gravure roller 4. The pressure roller 33 is located behind the liquid guide plate 31 along the rotation direction of the upper gravure roller 4. The rotation direction of the pressure roller 33 is opposite to the rotation direction of the upper gravure roller 4. A drive motor 34 for driving the pressure roller 33 to rotate is provided on the outside of the sealing shell 3.

[0045] Specifically, the side of the pressure roller 33 facing away from the liquid guide plate 31 is immersed in the electrolyte.

[0046] When the groove on the outer periphery of the upper gravure roller 4, after being filled with electrolyte, rotates to the pressure roller 33, the drive motor 34 drives the pressure roller 33 to rotate, which can re-immerse the groove on the outer periphery of the upper gravure roller 4 with electrolyte. Before being coated after rotating out of the sealing shell 3, the groove on the outer periphery of the upper gravure roller 4 has undergone three processes in sequence: liquid guiding sheet 32 ​​for guiding and filling, pressure roller 33 for wetting, and electrolyte immersion, which further improves the gravure coating quality of the electrode sheet.

[0047] like Figures 3 to 4 As shown, based on the above embodiments, this utility model provides another specific embodiment as follows:

[0048] The liquid supply assembly 5 includes a liquid supply pump 51, a liquid supply pipe 52, and multiple liquid distribution pipes 53; the liquid supply pump 51 is connected to the outside of the liquid storage tank 1; one end of the liquid supply pipe 52 is connected to the liquid supply pump 51, and the other end extends to the top of the sealing shell 3; the liquid distribution pipes 53 are arranged inside the sealing shell 3 and are all connected to the liquid supply pipe 52, and the outlet end of each liquid distribution pipe 53 faces the liquid guide plate 31 above the corresponding liquid guide plate 32.

[0049] Starting the supply pump 51 draws the electrolyte from the storage tank 1 into the supply pipe 52, and then sprays it through each distribution pipe 53 to the corresponding position of the guide plate 31 above the corresponding guide plate 32, thereby improving the electrolyte delivery efficiency.

[0050] like Figures 3 to 5 As shown, based on the above embodiments, this utility model provides another specific embodiment as follows:

[0051] The gravure printing liquid injection equipment also includes a collection tank 6 and a scraping mechanism 7; the collection tank 6 is located below the lower opening of the sealing shell 3 and the side of the upper gravure roller 4 facing the electrode exit direction, and the upper gravure roller 4 is in contact with the side of the lower opening of the sealing shell 3 facing the electrode exit direction; the collection tank 6 is inclined, and the bottom end of the collection tank 6 is directly above the position of the liquid storage tank 1 before passing the electrode; the scraping mechanism 7 is located at the bottom of the sealing shell 3, and the scraping mechanism 7 is used to scrape the electrolyte in the collection tank 6 into the liquid storage tank 1.

[0052] The opening at the bottom of the sealing shell 3, facing the electrode exit direction, allows for the scraping of electrolyte from the outer circumferential surface of the coated upper gravure roller 4. This allows the electrolyte to re-enter the grooves on the outer circumferential surface of the upper gravure roller 4, facilitating subsequent filling of these grooves. Electrolyte that cannot immediately enter the grooves falls into the inclined collection tank 6 and flows back into the storage tank 1. This improves the coating quality of the electrode and achieves electrolyte recycling. The scraping mechanism 7 can also periodically scrape the electrolyte from the collection tank 6, further enhancing the electrolyte recycling effect.

[0053] like Figures 3 to 5 As shown, based on the above embodiments, this utility model provides another specific embodiment as follows:

[0054] The scraping mechanism 7 includes a scraping screw 71, a polished rod 72, a scraping motor 73, a threaded block 74, and a scraper 75. The scraping screw 71 is rotatably connected below the sealing shell 3 and parallel to the length direction of the collection tank 6. The polished rod 72 is fixed below the sealing shell 3 and parallel to the scraping screw 71. The scraping motor 73 is located below the sealing shell 3, and the output shaft of the scraping motor 73 is coaxially fixed with the scraping screw 71. The threaded block 74 is threadedly connected to the scraping screw 71 and is penetrated by the polished rod 72. The scraper 75 is located on the threaded block 74 and is used to scrape the electrolyte in the collection tank 6.

[0055] When the threaded block 74 and scraper 75 are in their initial positions, they are located at the top of the collection tank 6. When it is necessary to scrape the inside of the collection tank 6, the scraping motor 73 is started to make the scraping screw 71 rotate. The scraping screw 71 drives the threaded block 74 and scraper 75 to slide along the length of the smooth rod 72, so that the scraper 75 scrapes the electrolyte in the collection tank 6 tilted downward into the storage tank 1, which improves the efficiency of scraping the electrolyte in the collection chamber.

[0056] like Figures 3 to 5 As shown, based on the above embodiments, this utility model provides another specific embodiment as follows:

[0057] The scraping mechanism 7 also includes a rotating shaft 76, a linkage screw 77, and a one-way limiting member 78. The rotating shaft 76 is rotatably connected to the threaded block 74, one end of the scraper 75 is fixed to the rotating shaft 76, and the other end of the scraper 75 is attached to the inner wall of the collection tank 6. The linkage screw 77 has two ends located below the sealing shell 3. The linkage screw 77 is parallel to the scraping screw 71. The rotating shaft 76 has threaded holes 761 at both ends for the corresponding linkage screw 77 to enter. When the threaded block 74 drives the rotating shaft 76 to connect with the linkage screw 77 at the bottom of the collection tank 6, the scraper 76... 5. Rotate upwards to disengage from the collection trough 6; when the threaded block 74 drives the rotating shaft 76 to connect with the linkage screw 77 at the top of the collection trough 6, the scraper 75 rotates downwards and re-fits into the collection trough 6; the rotational friction between the rotating shaft 76 and the threaded block 74 is greater than the sum of the weight of the scraper 75 and the thread friction between the rotating shaft 76 and the linkage screw 77; there are two one-way limiting members 78 and they are set at the corresponding linkage screw 77. The one-way limiting members 78 are used to limit the linkage screw 77 to rotate only when the thread is screwed into the threaded hole 761 of the rotating shaft 76.

[0058] To ensure continuous operation, when the scraping motor 73 drives the scraping screw 71 to rotate, causing the threaded block 74 and scraper 75 to move to the bottom of the collection tank 6, the linkage screw 77 near the bottom of the collection tank 6 is screwed into the threaded hole 761 of the rotating shaft 76. At this time, the linkage screw 77 rotates, and the scraper 75 remains in the collection tank 6 to ensure the scraping effect of the scraper 75 on the electrolyte in the collection tank 6 as much as possible. When the threaded block 74 and scraper 75 move toward the top of the collection tank 6 to reset, the one-way limiting member 78 prevents the linkage screw 77 from rotating. Then, the movement of the threaded block 74 and scraper 75 causes the rotating shaft 76 to drive the scraper 75 to rotate. At this time, the scraper 75 rotates out of the collection tank 6 to avoid pushing the electrolyte that subsequently falls into the collection tank 6 upwards. There is no need to stop the electrode coating operation when scraping the electrolyte in the collection tank 6, thus realizing continuous electrode coating operation.

[0059] When the scraping motor 73 drives the scraping screw 71 to rotate, causing the threaded block 74 and scraper 75 to move to the top of the collection tank 6, the linkage screw 77 near the top of the collection tank 6 is screwed into the threaded hole 761. At this time, the angle of the scraper 75 remains unchanged. When it is necessary to scrape the collection tank 6 again, the threaded block 74 and scraper 75 move towards the bottom of the collection tank 6. The one-way limiting member 78 restricts the linkage screw 77, causing the scraper 75 to rotate back into the collection tank 6. The scraping motor 73 continues to drive the scraping screw 71 to rotate, which improves the scraping efficiency of the electrolyte in the collection tank 6.

[0060] Specifically, the greater rotational friction between the rotating shaft 76 and the threaded block 74 can be achieved through the interference fit between the two, which can improve the stability of the scraper 75 in scraping the electrolyte inside the collection tank 6 when it moves toward the bottom of the collection tank 6, and also improve the stability of the scraper 75 outside the collection tank 6 when it moves toward the top of the collection tank 6.

[0061] Furthermore, the one-way limiting component 78 is a one-way bearing, and it is located at the rotational connection between the linkage screw 77 and the bottom of the sealing shell 3. The use of a one-way bearing in the one-way limiting component 78 ensures that the linkage screw 77 rotates in only one direction, resulting in good performance and low cost.

[0062] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gravure printing liquid injection device, characterized in that, include: A liquid storage tank (1) is used to be installed on a winding machine or a stacking machine; The lower gravure roller (2) is rotatably connected to the top opening of the liquid storage tank (1), and a scraper (11) is provided in the liquid storage tank (1) near the outer peripheral surface of the lower gravure roller (2); A sealing shell (3) is disposed above the liquid storage tank (1) and has a bottom opening; The upper gravure roller (4) is rotatably connected to the bottom opening of the sealing shell (3). The electrode passes between the lower gravure roller (2) and the upper gravure roller (4). The outer circumferential surface of the lower gravure roller (2) and the side of the lower opening of the sealing shell (3) facing the electrode feeding direction have a gap for the electrolyte to pass through. as well as A liquid supply assembly (5) is disposed between the liquid storage tank (1) and the sealing shell (3). The liquid supply assembly (5) is used to supply the electrolyte in the liquid storage tank (1) into the sealing shell (3).

2. The gravure printing liquid injection device as described in claim 1, characterized in that, The top of the sealing shell (3) is provided with a liquid guide plate (31) located directly above the upper gravure roller (4). The bottom of the liquid guide plate (31) is provided with a plurality of liquid guide pieces (32) facing the grooves on the outer periphery of the lower gravure roller (2). The liquid supply assembly (5) is used to draw the electrolyte in the liquid storage tank (1) onto the liquid guide plate (31).

3. The gravure printing liquid injection device as described in claim 2, characterized in that, A pressure roller (33) parallel to the upper gravure roller (4) is rotatably connected inside the sealing shell (3). The outer circumferential surface of the pressure roller (33) abuts against the outer circumferential surface of the upper gravure roller (4). The pressure roller (33) is located behind the liquid guide plate (31) along the rotation direction of the upper gravure roller (4). The rotation direction of the pressure roller (33) is opposite to the rotation direction of the upper gravure roller (4). A drive motor (34) for driving the pressure roller (33) to rotate is provided on the outside of the sealing shell (3).

4. The gravure printing liquid injection device as described in claim 2, characterized in that, The liquid supply assembly (5) includes: A liquid supply pump (51) is connected to the outside of the liquid storage tank (1); A liquid supply pipe (52), one end of which is connected to the liquid supply pump (51), and the other end extending to the top of the sealed housing (3); and Liquid distribution tubes (53) are disposed inside the sealing shell (3) and are all connected to the liquid supply tube (52). The outlet end of each liquid distribution tube (53) faces the liquid guide plate (31) above the corresponding liquid guide plate (32).

5. The gravure printing liquid injection device as described in claim 1, characterized in that, The gravure printing liquid injection equipment also includes: A collection trough (6) is located below the lower opening of the sealing shell (3) and on the side of the upper gravure roller (4) facing the electrode protrusion direction; the upper gravure roller (4) is in contact with the lower opening of the sealing shell (3) on the side facing the electrode protrusion direction; the collection trough (6) is inclined, and the bottom end of the collection trough (6) is located directly above the position of the liquid storage tank (1) before it passes the electrode; and A scraping mechanism (7) is provided at the bottom of the sealing shell (3). The scraping mechanism (7) is used to scrape the electrolyte in the collection tank (6) into the storage tank (1).

6. The gravure printing liquid injection device as described in claim 5, characterized in that, The scraping mechanism (7) includes: The scraping screw (71) is rotatably connected below the sealing shell (3) and parallel to the length direction of the collection groove (6); The polished rod (72) is fixed below the sealing shell (3) and parallel to the scraping screw (71); A scraping motor (73) is located below the sealing shell (3), and the output shaft of the scraping motor (73) is coaxially fixed with the scraping screw (71); A threaded block (74), threadedly connected to the scraping screw (71) and penetrated by the polished rod (72); and A scraper (75) is provided on the threaded block (74) and is used to scrape off the electrolyte in the collection tank (6).

7. The gravure printing liquid injection device as described in claim 6, characterized in that, The scraping mechanism (7) also includes: A rotating shaft (76) is rotatably connected to the threaded block (74), one end of the scraper (75) is fixed to the rotating shaft (76), and the other end of the scraper (75) is attached to the inner wall of the collection groove (6); The linkage screw (77) has two ends located below the sealing shell (3). The linkage screw (77) is parallel to the scraping screw (71). The two ends of the rotating shaft (76) are provided with threaded holes (761) for the linkage screw (77) to enter. When the threaded block (74) drives the rotating shaft (76) to connect with the linkage screw (77) at the bottom of the collection groove (6), the scraper (75) rotates upward to disengage from the collection groove (6). When the threaded block (74) drives the rotating shaft (76) to connect with the linkage screw (77) at the top of the collection groove (6), the scraper (75) rotates downward to re-fit into the collection groove (6). The rotational friction between the rotating shaft (76) and the threaded block (74) is greater than the sum of the weight of the scraper (75) and the threaded friction between the rotating shaft (76) and the linkage screw (77). Two one-way limiting members (78) are provided at the corresponding linkage screw (77). The one-way limiting members (78) are used to restrict the linkage screw (77) to rotate only when it is screwed into the threaded hole (761) of the rotating shaft (76).

8. The gravure printing liquid injection device as described in claim 7, characterized in that, The one-way limiting member (78) is a one-way bearing, and the one-way limiting member (78) is located at the rotational connection between the linkage screw (77) and the bottom of the sealing shell (3).

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