Pole piece edge gluing equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses pole piece edge gluing equipment which comprises two oppositely arranged conveying belts and a gluing assembly, the space between the two conveying belts is used for clamping and conveying a piece to be glued, the gluing assembly is arranged on one side of the conveying belts and comprises a gluing seat and a glue spraying nozzle, and the gluing seat is arranged on the other side of the conveying belts. A gluing groove is defined by the gluing base, a glue spraying groove which extends in the first direction and penetrates through the side wall of the gluing base is formed in the side, close to the conveying belt, of the gluing groove, and the glue spraying nozzle is arranged in the gluing groove and corresponds to the glue spraying groove. The pole piece edge gluing equipment can be used for stably gluing the side surface of the pole piece, the probability that insulation glue overflows to the upper surface and the lower surface of the pole piece is reduced, the edge thickness of the pole piece is not increased while the isolation sealing edge is stabilized, and the energy density of a battery cell is favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to an electrode edge coating device. Background Technology

[0002] When applying insulating adhesive to the edges of the electrode for isolation and sealing, the adhesive application area is difficult to control. The adhesive applied to the sides of the electrode can easily overflow onto the upper and lower surfaces of the electrode, resulting in an increase in the thickness of the electrode edges. After the cell is formed, the thickness at the end of the cell will also be relatively thick, which is not conducive to improving the energy density of the cell. Utility Model Content

[0003] The purpose of this invention is to provide an electrode edge coating device that can stably coat the side of the electrode, reducing the probability of insulating adhesive overflowing to the upper and lower surfaces of the electrode. While stabilizing the sealing edge, it does not increase the thickness of the electrode edge, which is beneficial to improving the energy density of the battery cell.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An electrode edge coating device includes: two oppositely arranged conveyor belts, the space between the two conveyor belts being used to clamp and transport parts to be coated; and a coating assembly disposed on one side of the conveyor belts, the coating assembly including a coating seat and a spray nozzle, the coating seat defining a coating groove, the coating groove having a spray nozzle extending in a first direction and penetrating the side wall of the coating seat on the side near the conveyor belt, and the spray nozzle disposed within the coating groove and corresponding to the spray nozzle.

[0006] The beneficial effects of this electrode edge coating equipment are as follows: By clamping and conveying the part to be coated with adhesive using two conveyor belts, the stability of the part's position during conveying can be ensured, preventing positional shifts or vibrations. When the edge of the part passes the corresponding position of the adhesive spraying trough during conveying, the adhesive spraying nozzle sprays adhesive onto the side of the edge of the part. This ensures that the adhesive is only sprayed onto the side of the edge of the part, and the insulating adhesive sprayed onto the upper and lower surfaces of the part is blocked by the side walls around the adhesive spraying trough, precisely controlling the coating area to the side of the part. This reduces the probability of insulating adhesive overflowing onto the upper and lower surfaces of the part, ensuring stable sealing without increasing the edge thickness of the part, which is beneficial for improving the energy density of the battery cell.

[0007] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0008] Figure 1This is a schematic diagram of the electrode edge coating device according to an embodiment of the present invention;

[0009] Figure 2 This is a partial structural schematic diagram of the electrode edge coating device according to an embodiment of the present invention;

[0010] Figure 3 This is another partial structural schematic diagram of the electrode edge coating device according to an embodiment of the present invention;

[0011] Figure 4 This is a partial structural cross-sectional view of the electrode edge coating device according to an embodiment of the present invention;

[0012] Figure 5 This is a schematic diagram of the conveyor belt structure according to an embodiment of the present utility model;

[0013] Figure 6 This is a partial structural cross-sectional view of another electrode edge coating device according to an embodiment of this utility model;

[0014] Figure 7 This is a schematic diagram of another conveyor belt structure according to an embodiment of the present utility model.

[0015] Figure label:

[0016] 100. Conveyor belt;

[0017] 200. Glue application assembly; 210. Glue application base; 211. Base body; 212. Side plate; 2121. Glue spray tank; 220. Glue spray nozzle; 201. Glue application tank;

[0018] 300. Scrapered parts;

[0019] 400. Glue storage assembly; 410. Glue storage tank; 420. Heating element; 430. Transfer pump; 440. Piping;

[0020] 10. Electrode. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] This utility model discloses an electrode edge coating device, referenced Figure 1 As shown, the electrode edge coating equipment includes two oppositely arranged conveyor belts 100 and a coating assembly 200. The space between the two conveyor belts 100 is used to clamp and transport the workpiece to be coated (in this embodiment, the electrode 10 is described as the workpiece to be coated). The coating assembly 200 is located on one side of the conveyor belts 100. The coating assembly 200 includes a coating seat 210 and a spray nozzle 220. The coating seat 210 defines a coating groove 201. A spray nozzle 2121 extending in a first direction and penetrating the side wall of the coating seat 210 is provided on the side of the coating groove 201 near the conveyor belts 100. The spray nozzle 220 is located in the coating groove 201 and is correspondingly arranged with the spray nozzle 2121.

[0025] First, it should be noted that in the prior art, since the position of the glue nozzle 220 is fixed, once the electrode 10 is displaced or shakes, the coverage area of ​​the glue nozzle 220 on the electrode 10 will change, which is not conducive to the control of the glue spraying area.

[0026] In this embodiment, by clamping and conveying the electrode 10 with two conveyor belts 100, the stability of the electrode 10's position during the conveying process can be ensured, avoiding positional shifts or jitters. During the conveying of the electrode 10, when the edge of the electrode 10 passes the position corresponding to the glue spraying groove 2121, the glue spraying nozzle 220 sprays glue onto the side of the edge of the electrode 10. During the glue spraying process, the glue spraying nozzle 220 can only spray insulating glue onto the side of the edge of the electrode 10, and the insulating glue sprayed onto the upper and lower surfaces of the electrode 10 is blocked by the side walls around the glue spraying groove 2121. This achieves the function of precisely controlling the glue application area on the side of the electrode 10, thereby reducing the probability of insulating glue overflowing onto the upper and lower surfaces of the electrode 10. While stabilizing the sealing edge, it does not increase the edge thickness of the electrode 10, which is beneficial to improving the energy density of the battery cell.

[0027] Optional, see reference Figure 3 and Figure 4 As shown, the glue application holder 210 includes a body 211 and a side plate 212. The body 211 is open on the side facing the conveyor belt 100, and the side plate 212 is connected to the body 211 on the side facing the conveyor belt 100. A glue spraying groove 2121 is disposed on the side plate 212. It is understood that separating the glue application holder 210 into two structures, the body 211 and the side plate 212, facilitates the processing of the glue spraying groove 2121. Furthermore, during actual assembly, the glue nozzle 220 can be placed into the body 211 first, and then the side plate 212 can be installed onto the glue application holder 210. This facilitates the installation of the glue nozzle 220 and ensures that the glue nozzle 220 is aligned with the glue spraying groove 2121. Optionally, the body 211 and the side plate 212 can be connected according to actual needs through welding, bonding, connectors, snap-fit ​​connections, etc. Of course, in an alternative embodiment of this utility model, the glue application base 210 can be a box-shaped integral structure, and a glue spraying groove 2121 can be machined on one side wall of the glue application base 210.

[0028] Optionally, the two conveyor belts 100 can travel at the same speed. Understandably, having both conveyor belts 100 travel at the same speed allows for synchronous transport of the electrode 10, preventing relative sliding friction between the conveyor belts 100 and the electrode 10. This further ensures the clamping effect on the electrode 10 and guarantees transport stability. The more stable the transport, the more stable the position of the electrode 10, and the more stable the area of ​​the insulating adhesive covering the electrode 10 during adhesive application, ensuring precise control of the adhesive application area on the side of the electrode 10.

[0029] Optional, see reference Figure 7As shown, the ratio of the width of the upper conveyor belt 100 along the second direction to the width of the lower conveyor belt 100 along the second direction is greater than 2 / 3. It can be understood that the closer the coverage areas of the two conveyor belts 100 along the second direction, the more balanced the force on the upper and lower surfaces of the electrode 10, resulting in more stable transmission. In this embodiment, controlling the ratio of the width of the upper conveyor belt 100 along the second direction to the width of the lower conveyor belt 100 along the second direction to a range greater than 2 / 3 helps ensure the stable movement of the electrode 10 under the clamping transmission action of the two conveyor belts 100.

[0030] Further optional, see reference Figure 5 As shown, the edges of the two conveyor belts 100 are flush. This means that the width of the upper conveyor belt 100 along the second direction is equal to the width of the lower conveyor belt 100 along the second direction. The upper and lower conveyor belts 100 have the same specifications, facilitating selection and reducing the overall manufacturing cost of the electrode edge coating equipment.

[0031] Optional, see reference Figure 6 As shown, the nozzle 220 is tilted, and the angle between the nozzle's spraying direction and the second direction is less than 30°. It is understood that during the spraying process, the larger the tilt angle of the nozzle 220, the easier it is to spray insulating adhesive onto the upper and / or lower surfaces of the electrode 10, resulting in a thicker adhesive layer on the side of the electrode 10 closest to the nozzle 220, thus leading to lower adhesive layer thickness uniformity. In this embodiment, by setting the angle between the nozzle 220's spraying direction and the second direction to less than 30°, the probability of insulating adhesive being sprayed onto the upper and / or lower surfaces of the electrode 10 can be reduced, thereby controlling the thickness on the side of the electrode 10 closest to the nozzle 220 and ensuring consistent adhesive layer thickness. Optionally, the angle between the nozzle 220's spraying direction and the second direction can be 30°, 25°, 20°, 15°, 10°, 5°, or other values ​​less than 30°.

[0032] Preferred, Reference Figure 4 As shown, the glue spray nozzle 220 is positioned directly opposite the glue spraying tank 2121. When the glue spray nozzle 220 is positioned directly opposite the glue spraying tank 2121, the glue spraying direction of the glue spray nozzle 220 is the second direction, which can minimize the probability of spraying insulating glue onto the upper and / or lower surface of the electrode 10, thereby ensuring the consistency of the insulating glue layer thickness.

[0033] Optional, see reference Figure 3As shown, the distance between the side wall (i.e., side plate 212) of the glue application base 210 with the glue spraying groove 2121 and the glue spraying nozzle 220 is L, where L satisfies the relationship: 0 < L ≤ 0.5 mm. L can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm, or other values ​​less than 0.5 mm. It is understandable that in actual installation, the larger the distance between the glue spraying nozzle 220 and the side plate 212, the easier it is for the sprayed insulating glue to spread, thereby reducing the accuracy of glue spraying. On the other hand, if the distance between the glue spraying nozzle 220 and the side plate 212 is too small, it is inconvenient to install the glue spraying nozzle 220. In this embodiment, the distance between the side plate 212 and the glue spraying nozzle 220 is controlled within the range of greater than 0 and less than 0.5 mm, which can improve the accuracy of glue spraying, accurately control the glue application area on the side area of ​​the electrode 10, and facilitate the installation of the glue spraying nozzle 220, making it convenient for users to assemble. Of course, in other embodiments of this utility model, the distance between the side plate 212 and the glue nozzle 220 can be adjusted according to actual needs, and is not limited to the above range.

[0034] Optional, see reference Figure 2 As shown, the ratio of the dimension of the adhesive spraying groove 2121 along the third direction to the thickness of the electrode 10 is 1-1.3. The ratio of the dimension of the adhesive spraying groove 2121 along the third direction to the thickness of the electrode 10 can be 1, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, or other values ​​within the range of 1-1.3.

[0035] It is understandable that the dimension of the glue spraying groove 2121 along the third direction is the height of the groove. If the height is too small, it is easy to cause friction with the electrode 10; if the height is too large, the insulating glue will easily cover the upper surface of the electrode 10 during glue spraying. In this embodiment, the ratio of the dimension of the glue spraying groove 2121 along the third direction to the thickness of the electrode 10 is controlled within the range of 1-1.3. This can avoid friction between the side plate 212 and the electrode 10, and also effectively prevent the phenomenon of insulating glue covering the upper surface of the electrode 10 during glue spraying. Of course, in other embodiments of this utility model, the ratio of the dimension of the glue spraying groove 2121 along the third direction to the thickness of the electrode 10 can be adjusted according to actual needs and is not limited to the above range.

[0036] Optional, see reference Figure 5 As shown, along the second direction, the edge of the electrode 10 is located outside the inner wall of the adhesive coating tank 201, or the edge of the electrode 10 is flush with the inner wall of the adhesive coating tank 201. Therefore, during the transport of the electrode 10 by the conveyor belt 100, the edge of the electrode 10 will not extend beyond the adhesive spraying tank 2121 and enter the interior of the adhesive coating tank 201, avoiding the phenomenon that the upper and lower surfaces of the electrode 10 will be exposed to the adhesive spraying area, thereby minimizing the probability of insulating adhesive overflowing onto the upper and lower surfaces of the electrode 10.

[0037] Optional, see reference Figure 3 As shown, the electrode edge coating equipment also includes a scraper 300, which is rotatably mounted inside the coating tank 201 and spaced apart from the spray nozzle 220. The scraper end 300 of the scraper is also spaced apart from the side wall of the coating seat 210 where the spray tank 2121 is located. It can be understood that the distance between the scraper 300 and the side plate 212 is equal to the set thickness of the insulating adhesive layer on the side of the electrode 10. The spaced arrangement between the scraper end 300 and the side wall of the coating seat 210 where the spray tank 2121 is located ensures the sealing effect and controls the total width of the electrode 10.

[0038] In an alternative embodiment, the scraping end 300 of the scraper abuts against the side wall of the adhesive application seat 210 provided with the adhesive spraying groove 2121.

[0039] Optionally, the electrode edge coating equipment also includes a heating mechanism connected to the scraper 300 to heat the scraper 300. It is understood that the heated scraper 300 facilitates scraping the adhesive, thereby easily controlling the thickness of the insulating adhesive layer. Further optionally, the heating mechanism can be a heating rod installed inside the scraper 300 or a heating unit located on the outside of the scraper 300, depending on actual needs.

[0040] Optionally, two adhesive application assemblies 200 are provided, and the two adhesive application assemblies 200 are symmetrically arranged on both sides of the conveyor belt 100 along the second direction. It can be understood that by setting two adhesive application assemblies 200, and placing them on both sides of the conveyor belt 100 along the second direction, adhesive can be applied and sealed to both sides at one time during the conveying of the electrode sheet 10, which is beneficial to improving work efficiency.

[0041] Optional, see reference Figure 1 As shown, the electrode edge coating equipment also includes a glue storage assembly 400, which includes a glue storage tank 410, a heating element 420 for heating the glue storage tank 410, and a delivery pump 430 connected to the glue storage tank 410 and the glue spray nozzle 220. It is understood that during actual operation, the glue storage assembly 400 continuously supplies insulating glue to the glue spray nozzle 220, ensuring that the electrode edge coating equipment can stably and continuously perform the edge coating process on the electrode 10.

[0042] Optionally, the heating element 420 is formed as a heating cylinder and is fitted onto the adhesive storage tank 410. This ensures that the adhesive storage tank 410 is heated uniformly, thereby ensuring a high temperature consistency of the insulating adhesive stored in the adhesive storage tank 410. In this embodiment, the temperature inside the adhesive storage tank 410 is maintained within the range of 160°C-180°C, ensuring that the insulating adhesive has good flowability.

[0043] Alternatively, the transfer pump 430 can be a low-speed gear pump. Other configurations of the transfer pump 430 can also be selected based on actual needs.

[0044] Alternatively, the pipes 440 connected to both ends of the delivery pump 430 can also have heating and insulation capabilities, preferably with a double-layer pipe design to improve their insulation performance, and the inner diameter is in the range of 1mm-2mm.

[0045] The electrode edge coating equipment of this utility model has the following advantages:

[0046] First, the glue storage component 400 and the glue application component 200 are highly integrated, increasing space utilization;

[0047] Secondly, the use of spray coating mode effectively avoids the problems of uniformity and thickness of ultra-thin adhesive coating;

[0048] Third, it has the ability to control the liquefaction state of insulating adhesive, transfer, spray, and scrape, and can control the sealing thickness to about 15um, further improving the safety and life of the battery.

[0049] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electrode edge coating device, characterized in that, include: Two oppositely arranged conveyor belts (100), the space between the two conveyor belts (100) is used for clamping and transporting the parts to be coated with adhesive; An adhesive application assembly (200) is disposed on one side of the conveyor belt (100). The adhesive application assembly (200) includes an adhesive application base (210) and an adhesive spray nozzle (220). The adhesive application base (210) defines an adhesive application groove (201). The adhesive application groove (201) is provided with an adhesive spray groove (2121) extending in a first direction and penetrating the side wall of the adhesive application base (210) on the side of the adhesive application groove (201) near the conveyor belt (100). The adhesive spray nozzle (220) is disposed in the adhesive application groove (201) and is correspondingly disposed to the adhesive spray groove (2121).

2. The electrode edge coating equipment according to claim 1, characterized in that, The two conveyor belts (100) have the same conveying speed.

3. The electrode edge coating equipment according to claim 1, characterized in that, The ratio of the width of the upper conveyor belt (100) along the second direction to the width of the lower conveyor belt (100) along the second direction is greater than 2 / 3.

4. The electrode edge coating equipment according to claim 3, characterized in that, The edges of the two conveyor belts (100) are flush.

5. The electrode edge coating equipment according to claim 1, characterized in that, The glue nozzle (220) is inclined, and the angle between the glue spraying direction of the glue nozzle (220) and the second direction is less than 30°.

6. The electrode edge coating equipment according to claim 1, characterized in that, The glue nozzle (220) is positioned directly opposite the glue spraying tank (2121).

7. The electrode edge coating equipment according to claim 1, characterized in that, The distance between the side wall of the glue application seat (210) with the glue spraying groove (2121) and the glue spraying nozzle (220) is L, and L satisfies the relationship: 0 < L ≤ 0.5 mm.

8. The electrode edge coating equipment according to claim 1, characterized in that, The ratio of the dimension of the glue spraying tank (2121) along the third direction to the thickness of the part to be coated is 1-1.

3.

9. The electrode edge coating equipment according to claim 1, characterized in that, Along the second direction, the edge of the part to be coated is located outside the inner wall of the coating groove (201), or the edge of the part to be coated is flush with the inner wall of the coating groove (201).

10. The electrode edge coating equipment according to claim 1, characterized in that, It also includes a scraper (300), which is rotatably mounted on the inner side of the glue application tank (201) and spaced apart from the glue spray nozzle (220). The scraping end of the scraper (300) is spaced apart from the side wall of the glue application seat (210) on which the glue spray tank (2121) is located.

11. The electrode edge coating equipment according to claim 10, characterized in that, It also includes a heating mechanism connected to the scraper (300) to heat the scraper (300).

12. The electrode edge coating equipment according to claim 1, characterized in that, Two adhesive application assemblies (200) are provided, and the two adhesive application assemblies (200) are symmetrically arranged on both sides of the conveyor belt (100) along the second direction.

13. The electrode edge coating equipment according to claim 1, characterized in that, It also includes a glue storage assembly (400), which includes a glue storage tank (410), a heating element (420) for heating the glue storage tank (410), and a delivery pump (430) connected to the glue storage tank (410) and the glue nozzle (220).

14. The electrode edge coating equipment according to claim 1, characterized in that, The glue application stand (210) includes a stand body (211) and a side plate (212). The stand body (211) is open on one side facing the conveyor belt (100). The side plate (212) is connected to the side of the stand body (211) facing the conveyor belt (100), and the glue spraying groove (2121) is disposed on the side plate (212).

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