Gluing head and gluing equipment

Abstract

The utility model discloses a gluing head and gluing equipment. The gluing head is provided with a glue passing channel, the glue passing channel is provided with a glue outlet, and the gluing head is further provided with a guiding arc face and an avoiding inclined face. Wherein the guiding cambered surface and the avoiding inclined surface are arranged back to back at an interval in the first direction, and the glue outlet is located between the guiding cambered surface and the avoiding inclined surface; the guide cambered surface is arranged to be a convex cambered surface, an included angle is formed between the avoiding inclined surface and the center line of the glue outlet, and the distance between the avoiding inclined surface and the guide cambered surface is reduced in the glue outlet direction of the glue outlet. According to the technical scheme provided by the utility model, the possibility that glue is accumulated on the gluing head and drips to form hard particles so as to cause subsequent damage to a tab can be reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a coating head and a coating device using the coating head. Background Technology

[0002] In the battery manufacturing process, the technology of welding tabs onto the electrode sheets is becoming increasingly widespread. After the tabs are welded, an insulating coating is typically applied to the welded area using an adhesive coating machine. This prevents weld slag from falling off during the welding process and avoids direct contact between the welded area and the separator, which could affect the stability of the battery's performance.

[0003] However, in the process of applying adhesive to the welded tab area using the adhesive coating equipment in the relevant technology, when the electrode sheet moves relative to the adhesive coating head of the equipment, the movement of the electrode sheet will carry the adhesive flowing out of the adhesive outlet of the adhesive coating head along the direction of movement to the side of the adhesive coating head opposite to the direction of movement, causing the adhesive to accumulate on the adhesive coating head. After accumulating to a certain extent, it will drip down to form hard particles, which can easily break and damage the tab. Utility Model Content

[0004] The main purpose of this application is to provide a glue applicator that reduces the possibility of glue accumulating and dripping to form hard particles, which could subsequently damage the tabs.

[0005] To achieve the above objectives, the glue applicator proposed in this application is provided with a glue passage, and the glue passage has a glue outlet;

[0006] The applicator head is also provided with a guide arc surface and a clearance slope that are arranged back-to-back in the first direction, and the dispensing port is located between the guide arc surface and the clearance slope.

[0007] The guide arc surface is set as an outwardly convex arc surface, and the avoidance slope and the center line of the glue outlet are set at an angle. In the glue dispensing direction of the glue outlet, the distance between the avoidance slope and the guide arc surface is set to decrease.

[0008] The adhesive applicator of this application allows the electrode to be moved from the side of the guide arc surface to the side of the avoidance slope during use. This allows the electrode to pass through the adhesive outlet located between the guide arc surface and the avoidance slope, carrying the adhesive flowing out of the outlet to apply adhesive to the area of ​​the electrode tab to be welded. Furthermore, during this application process, the avoidance slope on the side of the adhesive applicator away from the guide arc surface allows the adhesive to be avoided when it is carried by the electrode to the side of the avoidance slope. This reduces the possibility of contact between the adhesive applicator and the adhesive, thereby reducing the possibility of adhesive accumulating on the applicator and dripping down to form hard particles, which could subsequently damage the electrode tab.

[0009] Optionally, the angle between the avoidance ramp and the plane where the glue outlet is located is defined as α, satisfying the relationship: 60°≤α≤80°.

[0010] This improves the avoidance effect of the inclined plane on the glue brought to that side by the movement of the electrode sheet.

[0011] Optionally, the dispensing port includes a first side and a second side spaced apart in the first direction, with the first side being closer to the guide arc surface than the second side;

[0012] The end of the avoidance ramp near the glue outlet is connected to the second side; or, the end of the avoidance ramp near the glue outlet and the second side are spaced apart, and the glue applicator is also provided with a transition wall, which connects the avoidance ramp and the second side.

[0013] Therefore, by directly connecting the end of the avoidance ramp near the glue outlet to the second side, the avoidance ramp can be positioned closer to the glue outlet, thereby further improving its ability to avoid glue carried to the left side of the applicator head by the moving electrode. Furthermore, by providing a transition wall between the end of the avoidance ramp near the glue outlet and the second side, the strength of the applicator head near the glue outlet on the left side can be enhanced, reducing the possibility of insufficient strength of the applicator head on the side where the avoidance ramp is located due to its placement.

[0014] Optionally, when the dispensing head has a transition wall, in the first direction, the distance between the first side and the second side is defined as L1, and the distance between the end of the avoidance slope connected to the transition wall and the second side is defined as L2, satisfying the relationship: 0.3≤L2 / L1≤0.7;

[0015] And / or, the transition wall is set as a convex arc surface, and the radius of the transition wall is equal to the radius of the guiding arc surface.

[0016] Therefore, setting the ratio of L2 to L1 between 0.3 and 0.7 effectively balances the strength of the dispensing head and the ability to avoid the adhesive from the inclined surface. Furthermore, designing the transition wall as a convex arc surface allows it to also avoid adhesive carried to the left side of the dispensing head by the moving electrode. Simultaneously, the transition wall and the guiding arc surface have the same radius, which improves the ease of processing and shaping.

[0017] Optionally, the end of the guide arc surface near the first side is connected to the first side;

[0018] And / or, both the first and second sides are linear and arranged in parallel.

[0019] This improves the guiding effect of the guide arc on the electrode. Furthermore, setting the first and second sides as straight edges and parallel to each other ensures that the spacing between them is equal at all points, facilitating uniform coating of the electrode along the extension direction parallel to the first and second sides, thus improving the coating effect.

[0020] Optionally, the dispensing port includes a third side and a fourth side that are spaced apart from each other in a second direction intersecting the first direction, and the third side, the fourth side, the first side and the second side are arranged to form the dispensing port.

[0021] The applicator head is also provided with two flat wall surfaces spaced apart in the second direction, both of which are located between the guide arc surface and the avoidance slope surface;

[0022] The two flat walls and the glue outlet are located on the same plane, and one of the two flat walls is connected to the third side, while the other is connected to the fourth side.

[0023] Therefore, the two flat walls and the electrode can make contact, reducing the possibility of glue flowing out from the front and back sides of the glue outlet.

[0024] Optionally, in the second direction, at least one of the two flat walls is configured as a shortened plane, and in the second direction, the projected length of the shortened plane is defined as L3, satisfying the relationship: 0.1 mm ≤ L3 ≤ 0.5 mm.

[0025] Therefore, by setting the flat wall surface as a shortening plane, the dimension of the flat wall surface in the second direction can be shortened so as to control the flatness of the flat wall surface during processing, while reducing the contact area between the flat wall surface and the electrode tab, thereby helping to reduce the possibility of local protrusions on the flat wall surface causing scratches to the electrode tab.

[0026] Optionally, one of the flat wall surfaces is configured as a shortened plane, and the other flat wall surface is configured as a non-shortened plane;

[0027] In the second direction, the projected length of the shortened plane is less than the projected length of the non-shortened plane.

[0028] Therefore, the flat wall surface with the corresponding tab in one of the two flat wall surfaces can be set as a shortened plane to improve the blocking effect of the other flat wall surface on the glue flowing out from that side.

[0029] Optionally, in the second direction, the projected length of the shortened plane is defined as L3, and the projected length of the non-shortened plane is defined as L4, satisfying the relationship: 0.1≤L3 / L4≤0.5;

[0030] And / or, 0.1 mm ≤ L3 ≤ 0.5 mm.

[0031] Therefore, it is possible to effectively balance the blocking effect of the shortened plane on the glue flowing out from this side, as well as the control effect on the flatness of the shortened plane.

[0032] Optionally, the applicator head is also provided with two convex side arc surfaces that are spaced apart from each other in the second direction, and the shortened plane and the non-shortened plane are located between the two side arc surfaces;

[0033] One side arc surface connects the guide arc surface, the shortening plane, and the avoidance slope, while the other side arc surface connects the guide arc surface, the non-shortening plane, and the avoidance slope.

[0034] Therefore, the coating head on this side can reduce the possibility of contact between the electrode and the tab, further improving the accuracy of coating the electrode.

[0035] Optionally, in the second direction, the projected length of the side arc surface connected to the shortening plane is greater than the projected length of the side arc surface connected to the non-shortening plane;

[0036] And / or, the guiding arc surface, the avoidance ramp surface, and the ends of the two side arc surfaces away from the glue outlet are located on the same plane.

[0037] This improves the regularity of the glue applicator's shape, thereby enhancing the ease of processing and shaping the glue applicator.

[0038] Optionally, the applicator head includes:

[0039] The fixing base has a connecting surface and a first channel; and

[0040] A glue nozzle protrudes from the connecting surface and has a second channel. The second channel and the first channel are connected to form a glue passage. The end of the second channel away from the first channel has a glue outlet.

[0041] Both the guide arc surface and the avoidance slope are located on the nozzle, and the ends of the guide arc surface and the avoidance slope that are away from the nozzle are connected to the connecting surface.

[0042] Therefore, a relatively large mounting base can be used to set up the connection structure to achieve external installation connection, while a small nozzle can be used to apply adhesive to the electrode, reducing the possibility of interference with the electrode or other objects.

[0043] Optionally, in the dispensing direction of the glue outlet, the cross-section of the glue passage is reduced;

[0044] And / or, the mounting base is provided with mounting holes that penetrate the connecting surface of the mounting base and the side opposite to the connecting surface;

[0045] And / or, the mounting base and the nozzle are integrated into one unit.

[0046] Therefore, reducing the cross-section of the glue channel decreases the possibility of foreign objects falling onto the electrode from the glue outlet. The mounting holes allow for the passage of fastening screws, thus improving the ease of mounting the glue applicator on the frame or other objects in the glue applicator equipment. Integrating the mounting base and nozzle into a single structure eliminates subsequent assembly processes, improving the production efficiency of the glue applicator. Simultaneously, it enhances the connection and sealing strength between the mounting base and the nozzle.

[0047] This application also proposes an adhesive applicator, including the aforementioned adhesive applicator head. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of an embodiment of the adhesive applicator of this application;

[0050] Figure 2 for Figure 1 Another perspective view of the intermediate coating nozzle;

[0051] Figure 3 for Figure 2 Another perspective view of the coating head;

[0052] Figure 4 for Figure 3 Another perspective diagram of the intermediate coating nozzle;

[0053] Figure 5 for Figure 4 A schematic diagram of the nozzle structure of the intermediate coating adhesive head;

[0054] Figure 6 for Figure 3 A cross-sectional view of the intermediate coating head.

[0055] Explanation of icon numbers:

[0056] label name label name 100 Glue applicator 37 Side arc surface 10 Fixed base 50 glue channel 11 Connection surface 51 First Channel 13 Mounting holes 53 Second Channel 30 rubber nozzle 55 Inlet 31 Guide arc surface 57 Glue outlet 33 Avoiding the slope 551 First side 34 transition wall 553 Second side 35 Smooth wall surface 555 Third side 35A shortening plane 557 Fourth side 35B Non-shortened plane

[0057] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0059] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0060] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0062] Batteries, which are devices used to store electrical energy, are widely used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields.

[0063] The battery cell is the smallest unit that makes up a battery. The structure of a battery cell typically includes a battery casing and an electrode assembly housed within the casing. The electrode assembly is the component within the battery cell where the actual electrochemical reaction occurs. Further, the electrode assembly includes a positive electrode, a negative electrode, and a separator located between them. The positive electrode, negative electrode, and separator can be formed by winding or stacking. Moreover, to connect the battery to an external circuit, the electrodes (i.e., the positive and negative electrodes) need to be provided with tabs to connect the electrodes to the external circuit.

[0064] In the battery manufacturing process, the technology of welding tabs onto the electrode sheets is becoming increasingly widespread. After the tabs are welded, an insulating coating is typically applied to the welded area using an adhesive coating machine. This prevents weld slag from falling off during the welding process and avoids direct contact between the welded area and the separator, which could affect the stability of the subsequent battery performance.

[0065] However, in the process of applying adhesive to the welded tab area using the adhesive coating equipment in the relevant technology, when the electrode moves relative to the adhesive coating head of the equipment, the movement of the electrode will carry the adhesive flowing from the adhesive outlet of the adhesive coating head to the side of the adhesive coating head opposite to the direction of movement. For example, when the electrode moves from right to left to apply adhesive, the adhesive will be carried to the left side of the adhesive coating head, causing the adhesive to accumulate on the adhesive coating head. After accumulating to a certain extent, it will drip down to form hard particles, which can easily break and damage the tab.

[0066] Therefore, based on the above considerations, in order to solve the problem in related technologies where adhesive tends to accumulate on the coating head and drip down to form hard particles when applying adhesive to the tab area welded on the electrode sheet, which can easily break and damage the tab, this application proposes a novel coating head for use in coating equipment. This coating head innovatively features a clearance slope on the side opposite to the guide arc surface. This clearance slope avoids adhesive carried to the side of the clearance slope during the movement of the electrode sheet relative to the coating head, reducing the possibility of contact between the coating head and the adhesive on that side, and thus reducing the possibility of adhesive accumulation on that side of the coating head.

[0067] In addition, it should be noted that the adhesive applicator proposed in this application can be used not only for applying adhesive to the tab area on the electrode sheet after welding, but also for applying adhesive to other products, such as adhesive encapsulation of integrated circuits and semiconductors. This application does not limit the application scenario of the adhesive applicator.

[0068] The structure of the adhesive applicator proposed in this application will be explained and illustrated below with examples:

[0069] Please refer to the reference. Figures 1 to 3 ,as well as Figure 6In one embodiment of this application, the glue applicator 100 is provided with a glue passage 50, which has a glue outlet 57. The glue applicator 100 is also provided with a guide arc surface 31 and a relief slope 33 that are arranged back-to-back in a first direction. The glue outlet 57 is located between the guide arc surface 31 and the relief slope 33. The guide arc surface 31 is configured as an outwardly convex arc surface. The center lines of the relief slope 33 and the glue outlet 57 are arranged at an angle. In the glue dispensing direction of the glue outlet 57, the distance between the relief slope 33 and the guide arc surface 31 is reduced.

[0070] The coating head 100 can be used to form a glue passage 50, with a glue inlet 55 and a glue outlet 57 at each end. The glue inlet 55 can be connected to the glue container in the coating equipment via a connecting pipe, allowing the glue contained in the container to enter the glue passage 50 through the connecting pipe and the glue inlet 55. The glue outlet 57 allows the glue to flow out of the glue passage 50, so that when the electrode sheet moves against the end of the coating head 100 with the glue outlet 57, as described above, the glue flowing out of the outlet 57 can be carried away, thereby achieving the coating of the electrode sheet by the coating head 100. Furthermore, the glue passage 50 can extend linearly. At this point, the glue inlet direction of the glue inlet 55, the glue passage direction of the section of the glue passage 50 between the glue inlet 55 and the glue outlet 57, and the glue outlet direction of the glue outlet 57 are all consistent, which simplifies the structure of the glue passage 50 and improves its processing and molding convenience. Simultaneously, this arrangement also improves the smoothness of glue flow within the applicator head 100. For example, if the first direction is horizontal, the glue passage 50 can extend vertically, forming the glue inlet 55 at the upper end and the glue outlet 57 at the lower end. Furthermore, the cross-sectional shape of the glue passage 50 can be racetrack-shaped or rectangular to meet the glue application width requirements of the applicator head 100. Of course, the cross-sectional shape of the glue passage 50 can also be square; this application does not limit the cross-sectional shape of the glue passage. Furthermore, in the glue-passing direction of the glue-passing channel 50, which can also be described as the direction from the glue inlet 55 to the glue outlet 57, the cross-sectional area of ​​the glue-passing channel 50 at various points can be set to be equal, or it can be set to be reduced, in order to prevent foreign objects from falling from the glue outlet 57 onto the electrode being coated. In addition, the glue-applying head 100 can be the structure type including the fixing base 10 and the glue nozzle 30 as described below, or it can be a cylindrical structure type. This application does not limit the structure type and shape of the glue-applying head 100.

[0071] The guiding arc surface 31 can be positioned on one side of the coating head 100 in the direction of movement when it is moving away from the electrode sheet for coating. For example, when the electrode sheet is moved for coating from right to left, the guiding arc surface 31 can be positioned on the right side of the coating head 100. Thus, when the electrode sheet to be coated is moved for coating from right to left via the conveyor line in the coating equipment, the guiding arc surface 31 can guide the electrode sheet or other product to be coated, ensuring it accurately passes between the end of the coating head 100 with the glue outlet 57 and the conveyor line, improving the reliability of the coating process. The guiding arc surface 31 can be positioned at the end of the coating head 100 near the glue outlet 57. Alternatively, in the direction from the glue inlet 55 to the glue outlet 57, when the length of the coating head 100 is small, the guiding arc surface 31 can extend further to the end of the coating head 100 with the glue inlet 55.

[0072] The avoidance slope 33 can be located on the side of the applicator head 100 facing away from the guide arc surface 31. For example, when the guide arc surface 31 is located on the right side of the applicator head 100 as described above, the avoidance slope 33 can be located on the left side of the applicator head 100. Furthermore, in the dispensing direction of the dispensing port 57, or in the direction from top to bottom, the avoidance slope 33 can be tilted to the right. In this case, when the electrode sheet to be applicated moves from right to left and some adhesive is carried to the left side of the applicator head 100, the avoidance slope 33 can avoid this adhesive, reducing the possibility of the applicator head 100 contacting the adhesive on that side, thereby reducing the possibility of adhesive accumulation on the left side of the applicator head 100.

[0073] In use, the adhesive applicator 100 of this application allows the electrode to be moved from the side of the guide arc surface 31 to the side of the avoidance slope 33. This allows the electrode to pass through the adhesive outlet 57 located between the guide arc surface 31 and the avoidance slope 33, carrying the adhesive flowing out of the outlet 57 to apply adhesive to the area of ​​the electrode tab to be welded. Furthermore, during this application process, the avoidance slope 33 on the side of the adhesive applicator 100 away from the guide arc surface 31 allows the adhesive to be avoided by the avoidance slope 33 as it is carried by the electrode to this side. This reduces the possibility of contact between the adhesive applicator 100 and the adhesive, thereby reducing the possibility of adhesive accumulating on the applicator 100 and dripping down to form hard particles, which could subsequently damage the electrode tab. Additionally, the convex arc shape of the guide arc surface 31 allows for a smooth transition without sharp edges, further reducing the possibility of damage to the electrode tab.

[0074] In one embodiment of this application, the angle between the plane containing the avoidance slope 33 and the glue outlet 57 is defined as α, satisfying the relationship: 60°≤α≤80°.

[0075] When the first direction is horizontal as described above, the glue outlet 57 can be located at the lower end of the glue applicator 100, and the plane where the glue outlet 57 is located can also be said to be a horizontal plane.

[0076] In this embodiment, setting the included angle α to between 60° and 80° allows the avoidance slope 33 to have a relatively large inclination, thereby improving the avoidance effect of the avoidance slope 33 on the adhesive brought to that side by the movement of the electrode. The included angle α can be 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, or 80°, or any value within the above range.

[0077] Please refer to the reference. Figures 3 to 5 In one embodiment of this application, the dispensing port 57 includes a first side 551 and a second side 553 that are spaced apart from each other in a first direction. The first side 551 is closer to the guide arc surface 31 than the second side 553. The end of the avoidance slope 33 near the dispensing port 57 is connected to the second side 553.

[0078] When the guiding arc surface 31 and the avoidance slope surface 33 are located on the right and left sides of the glue applicator 100, respectively, as described above and below, the first side 551 can be the right side of the glue outlet 57, and the second side 553 can be the left side of the glue outlet 57. Furthermore, the first side 551 can be linear or curved. Similarly, the second side 553 can also be linear or curved. When both the first side 551 and the second side 553 are linear, they are parallel, or their extension directions can intersect. Additionally, the end of the guiding arc surface 31 near the first side 551, or the lower end of the guiding arc surface 31, can be directly connected to the first side 551. Alternatively, the end of the guiding arc surface 31 near the first side 551 and the first side 551 can be spaced apart. In this case, the glue applicator 100 can be connected by a transitional wall between the guiding arc surface 31 and the first side 551. The transition wall can be a slope or a plane; this application does not limit this. The end of the avoidance slope 33 near the dispensing port 57 can be considered the lower end of the avoidance slope 33.

[0079] In this embodiment, the end of the avoidance slope 33 near the glue outlet 57 is directly connected to the second side 553, which makes the avoidance slope 33 closer to the glue outlet 57, thereby further improving the avoidance effect of the avoidance slope 33 on the glue brought to the left side of the glue application head 100 by the electrode sheet movement.

[0080] Please refer to the reference. Figure 3and Figure 4 In one embodiment of this application, the avoidance slope 33 is spaced apart from the end near the glue outlet 57 and the second side 553, and the glue applicator 100 is also provided with a transition wall 34, which connects the avoidance slope 33 and the second side 553.

[0081] The transition wall 34 can be disposed between the lower end of the avoidance slope 33 and the second side 553 to connect the avoidance slope 33 and the second side 553. The transition wall 34 can be an arc surface or a plane, and this application does not limit it.

[0082] In this embodiment, a transition wall 34 is provided between the end of the avoidance slope 33 near the glue outlet 57 and the second side 553, which can enhance the strength of the end of the glue applicator 100 near the glue outlet 57 on the left side and reduce the possibility that the glue applicator is not strong enough on the side where the avoidance slope 33 is located due to the setting of the avoidance slope 33.

[0083] In one embodiment of this application, in the first direction, the distance between the first side 551 and the second side 553 is defined as L1, and the distance between the end of the avoidance slope 33 connected to the transition wall 34 and the second side 553 is defined as L2, satisfying the relationship: 0.3≤L2 / L1≤0.7.

[0084] In this embodiment, setting the ratio of L2 to L1 between 0.3 and 0.7 ensures that the end of the avoidance ramp 33 connected to the transition wall 34 is not too close to the glue outlet 57, thereby improving the strength of the glue outlet on the side where the avoidance ramp 33 is located. Simultaneously, it also ensures that the end of the avoidance ramp 33 connected to the transition wall 34 is not too far from the glue outlet 57, thus improving the avoidance effect of the avoidance ramp 33 on the glue brought to the left side of the glue applicator 100 by the electrode movement. In other words, this setting of the L2 to L1 ratio range effectively balances the strength of the glue outlet and the avoidance effect of the avoidance ramp 33 on the glue. The ratio of L2 to L1 can be 0.3, 0.4, 0.5, 0.6, or 0.7, or any value within the above range. In some embodiments, the value of L2 can be 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13 or 0.14, or any value within the above range.

[0085] Please refer to the reference. Figures 2 to 5 In one embodiment of this application, the transition wall 34 is configured as an outwardly convex arc surface, and the radius of the transition wall 34 is equal to the radius of the guiding arc surface 31.

[0086] In this embodiment, the transition wall 34 is also configured as a convex arc surface, so that the transition wall 34 can also avoid the glue brought to the left side of the coating head 100 by the electrode movement. Furthermore, setting the radius of the transition wall 34 and the radius of the guide arc surface 31 to be equal can make them have consistent radii, which is beneficial to improving the convenience of processing and shaping.

[0087] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the end of the guide arc surface 31 near the first side 551 is connected to the first side 551.

[0088] In this embodiment, the lower end of the guiding arc surface 31 is directly connected to the first side 551, so that the guiding effect of the guiding arc surface 31 on the electrode sheet can be continuously guided to the glue outlet 57, thereby improving the guiding effect of the guiding arc surface 31 on the electrode sheet. At the same time, this setting can also simplify the outer surface setting of the glue applicator 100, thereby improving the convenience of processing and shaping the glue applicator 100.

[0089] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the first side 551 and the second side 553 are both linear and arranged in parallel.

[0090] Both the first side 551 and the second side 553 are linear, meaning they are both straight edges.

[0091] In this embodiment, the first side 551 and the second side 553 are set as straight edges and arranged in parallel, so that the spacing between the first side 551 and the second side 553 is equal at all points. This facilitates uniform coating of the electrode sheet at all points along the extension direction parallel to the first side 551 and the second side 553 (i.e., the second direction described below), improving the coating effect on the electrode sheet. At the same time, this arrangement also allows for a more regular shape of the glue outlet 57, which in turn improves the convenience of its processing and shaping.

[0092] Please refer to the reference. Figure 4 and Figure 5In one embodiment of this application, the glue outlet 57 includes a third side 555 and a fourth side 557 spaced apart in a second direction intersecting the first direction. The third side 555, the fourth side 557, the first side 551, and the second side 553 are arranged to form the glue outlet 57. The glue applicator 100 is also provided with two flat wall surfaces 35 spaced apart in the second direction. Both flat wall surfaces 35 are located between the guide arc surface 31 and the avoidance slope surface 33. The two flat wall surfaces 35 and the glue outlet 57 are located on the same plane, and one of the two flat wall surfaces 35 is connected to the third side 555, and the other is connected to the fourth side 557.

[0093] When the first direction is left-right as described above, the second direction can be front-back. In this case, the third side 555 can be the rear side of the glue outlet 57, and the fourth side 557 can be the front side of the glue outlet 57. The two flat wall surfaces 35 can be located on the rear and front sides of the glue outlet 57, respectively. In addition, when the cross-section of the glue channel 50 is racetrack-shaped or rectangular as described above, the distance between the first side 551 and the second side 553 can be less than the distance between the third side 555 and the fourth side 557. In other words, the length direction of the glue outlet 57 is parallel to the second direction, and the width direction is parallel to the first direction. In addition, when the guide arc surface 31 is directly connected to the first side 551 of the glue outlet 57 as described above, the right side of the two flat wall surfaces 35 can be connected to the lower end of the guide arc surface 31. When the guide arc surface 31 is spaced apart from the first side 551 as described above, the right sides of the two flat wall surfaces 35 can connect to the wall surface located between the guide arc surface 31 and the first side 551. Similarly, when the avoidance slope 33 is directly connected to the second side 553 as described above, the left sides of the two flat wall surfaces 35 can connect to the avoidance slope 33. When the avoidance slope 33 is connected to the second side 553 through the transition wall surface 34 as described above, the left sides of the two flat wall surfaces 35 can connect to the transition wall surface 34.

[0094] In this embodiment, flat wall surfaces 35 are provided on both the front and rear sides of the adhesive outlet 57. Since the flat wall surfaces 35 and the adhesive outlet 57 are located on the same plane, when the electrode moves from the lower end of the adhesive outlet 57, it can contact the electrode through the two flat wall surfaces 35, thereby reducing the possibility of adhesive flowing out from the front and rear sides of the adhesive outlet 57. This facilitates the formation of an adhesive layer on the electrode with the same size as the front and rear direction of the adhesive outlet, and improves the control effect on the width of the adhesive layer.

[0095] Please refer to the reference. Figure 4 and Figure 5In one embodiment of this application, the third side 555 and the fourth side 557 can be arc-shaped so that the cross-section of the adhesive channel can be formed into a racetrack shape, thereby improving the convenience of processing and shaping the adhesive channel.

[0096] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, in the second direction, at least one of the two flat wall surfaces 35 is configured as a shortened plane 35A. In the second direction, the projected length of the shortened plane 35A is defined as L3, satisfying the relationship: 0.1 mm ≤ L3 ≤ 0.5 mm.

[0097] At least one of the two flat wall surfaces 35, that is, one flat wall surface 35 can be set as a shortening plane 35A, or both flat wall surfaces 35 can be set with shortening planes 35A.

[0098] In this embodiment, when the adhesive applicator 100 is used to apply adhesive to the tab area on the electrode sheet after welding, the tab area is located in the area of ​​the current collector of the electrode sheet that is not coated with an active material layer, making this area relatively thin. Therefore, by setting the length of the flat wall surface 35 corresponding to the tab area in the second direction to 0.1 mm to 0.5 mm, the dimension of the flat wall surface 35 in the second direction can be shortened while reducing the possibility of adhesive flowing out from the front and rear sides of the adhesive outlet 57 as described above. At this time, the area of ​​the flat wall surface 35 is small, which makes it easier to control the flatness of the flat wall surface 35 during processing. At the same time, it can also reduce the contact area between the flat wall surface 35 and the tab, thereby helping to reduce the possibility of local protrusions of the flat wall surface 35 causing scratches to the tab. The value of L3 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm, or any value within the above range.

[0099] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, one of the flat wall surfaces 35 is configured as a shortened plane 35A, and the other flat wall surface 35 is configured as a non-shortened plane 35B; in the second direction, the projected length of the shortened plane 35A is less than the projected length of the non-shortened plane 35B.

[0100] In this embodiment, when the glue applicator 100 is used to apply glue to the tab area that has been welded on the electrode sheet, since the current collector in the electrode sheet is coated with an active material layer in the area other than the tab, it is sufficient to set the flat wall 35 corresponding to the tab in the two flat wall surfaces 35 as a shortened plane 35A, so as to improve the blocking effect of the other flat wall surface 35 on the glue flowing out from that side.

[0101] In one embodiment of this application, in the second direction, the projected length of the shortened plane 35A is defined as L3, and the projected length of the non-shortened plane 35B is defined as L4, satisfying the relationship: 0.1≤L3 / L4≤0.5.

[0102] In this embodiment, setting the L3 / L4 ratio to 0.1 to 0.5 ensures that the projected length of the shortened plane 35A in the second direction is not too small, thus preventing it from affecting the blocking effect on the glue flowing out from that side. Simultaneously, it also ensures that the projected length of the shortened plane 35A in the second direction is not too large, thus preventing it from affecting the control of its flatness. In other words, this setting of the L3 / L4 ratio range effectively balances the blocking effect of the shortened plane 35A on the glue flowing out from that side with the control effect on the flatness of the shortened plane 35A. The value of L3 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm, or any value within the above range.

[0103] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the glue applicator 100 is further provided with two outwardly convex side arc surfaces 37 arranged back-to-back in a second direction, and the shortening plane 35A and the non-shortening plane 35B are located between the two side arc surfaces 37; one side arc surface 37 connects the guide arc surface 31, the shortening plane 35A and the avoidance slope 33, and the other side arc surface 37 connects the guide arc surface 31, the non-shortening plane 35B and the avoidance slope 33.

[0104] When the second direction is the front-to-back direction as described above, one side arc surface 37 can be located in front of the front flat wall surface 35 (i.e., the shortened plane 35A), and the other arc surface can be located behind the rear flat wall surface 35 (i.e., the non-shortened plane 35B). Additionally, when the glue applicator 100 is also provided with a transition wall surface 34 as described above, the lower ends of the two side arc surfaces 37 can also connect to the transition wall surface 34.

[0105] In this embodiment, a side arc surface 37 is further provided on the second direction of the coating head 100, so that the coating head 100 can reduce the possibility of contact between the electrode and the tab on this side, and further improve the accuracy of coating the electrode.

[0106] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, in the second direction, the projected length of the side arc surface 37 connected to the shortening plane 35A is greater than the projected length of the side arc surface 37 connected to the non-shortening plane 35B.

[0107] In this embodiment, the projected length connected to the shortened plane 35A is greater than the projected length connected to the non-shortened plane 35B. In other words, the size of the side arc surface 37 connected to the shortened plane 35A can be extended to form a smoother arc surface, which in turn helps to further reduce the possibility of contact between the glue applicator 100 and the tab.

[0108] Please refer to the reference. Figure 3 and Figure 4 In one embodiment of this application, the guide arc surface 31, the avoidance slope surface 33, and the ends of the two side arc surfaces 37 that are away from the glue outlet 57 are located on the same plane.

[0109] The guide arc surface 31, the avoidance slope surface 33, and the two side arc surfaces 37 are located at the ends away from the glue outlet 57, or the upper ends of the guide arc surface 31, the avoidance slope surface 33, and the two side arc surfaces 37 are at the same height.

[0110] In this embodiment, setting the guide arc surface 31, the avoidance slope surface 33, and the ends of the two side arc surfaces 37 away from the glue outlet 57 to the same height can improve the regularity of the shape of the glue applicator 100, thereby improving the convenience of processing and shaping the glue applicator 100.

[0111] Please refer to the reference. Figures 1 to 6 In one embodiment of this application, the glue applicator 100 includes a fixing base 10 and a glue nozzle 30. The fixing base 10 is provided with a connecting surface 11 and a first channel 51. The glue nozzle 30 protrudes from the connecting surface 11 and is provided with a second channel 53. The second channel 53 and the first channel 51 are connected to form a glue passage 50. The end of the second channel 53 away from the first channel 51 has a glue outlet 57. A guide arc surface 31 and a relief slope 33 are both provided on the glue nozzle 30. The ends of the guide arc surface 31 and the relief slope 33 away from the glue outlet 57 are both connected to the connecting surface 11.

[0112] The mounting base 10 can be used to provide a mounting position for connection with the frame or other objects in the glue application equipment. When the glue channel 50 extends vertically as described above, the shape of the mounting base 10 on the horizontal projection plane can be square, rectangular, or other shapes; this application does not limit the shape of the mounting base 10. Furthermore, the upper end of the first channel 51 can penetrate the upper surface of the mounting base 10 to form the glue inlet 55 described above, and the connecting surface 11 can be the lower surface of the mounting base 10. The glue nozzle 30 can be connected to the lower surface of the mounting base 10, and on the horizontal projection plane, the projection of the glue nozzle 30 can be located inside the connecting surface 11. The guide arc surface 31, the avoidance slope 33, and the ends of the two side arc surfaces 37 away from the glue outlet 57 described above can all be connected to the connecting surface 11.

[0113] In this embodiment, the coating head 100 is configured to include a mounting base 10 and a nozzle 30. This allows the relatively large mounting base 10 to be connected to the frame or other objects in the coating equipment, thus enabling the connection structure to be installed on the relatively large mounting base 10. The relatively small nozzle 30, on the other hand, can be used to apply adhesive in contact with the electrode, thereby reducing the possibility of interference between the coating head 100 and the electrode or other objects during coating.

[0114] Please refer to Figure 6 In one embodiment of this application, the cross-section of the glue channel 50 is reduced in the glue dispensing direction of the glue outlet 57.

[0115] When the glue channel 50 is provided with an inlet 55 at the upper end and an outlet 57 at the lower end as described above, it can also be said that the cross-section of the glue channel 50 is reduced from top to bottom, so that the glue channel 50 can be inverted cone shape, and the area of ​​the inlet 55 is larger than the area of ​​the outlet 57.

[0116] In this embodiment, the cross-section of the glue channel 50 is reduced to decrease the possibility of foreign objects falling from the glue outlet 57 onto the electrode.

[0117] Please refer to the reference. Figure 1 , Figure 3 , Figure 4 as well as Figure 6 In one embodiment of this application, the fixing base 10 is provided with a mounting hole 13, which penetrates the connecting surface 11 of the fixing base 10 and the side opposite to the connecting surface 11.

[0118] Mounting holes 13 are used to insert fastening screws to mount the mounting base 10 onto the frame or other object in the glue application equipment. The number of mounting holes 13 can be one, two, or more, and they can be distributed on opposite sides of the glue application head 100, or more sides thereof.

[0119] In this embodiment, a mounting hole 13 is provided on the fixing base 10, through which a fastening screw can pass, thereby improving the convenience of installing the glue applicator 100 on the frame or other objects in the glue applicator equipment.

[0120] In one embodiment of this application, the fixing seat 10 and the nozzle 30 are an integral structure.

[0121] Integrated structure, meaning it is manufactured in one piece, such as casting and injection molding.

[0122] In this embodiment, the fixing base 10 and the nozzle 30 are configured as an integral structure, which can eliminate the need for subsequent assembly processes and improve the production efficiency of the dispensing head 100. At the same time, it can also enhance the connection strength and sealing strength between the fixing base 10 and the nozzle 30. Of course, this application is not limited to this; in other embodiments, the fixing base 10 and the nozzle 30 can also be configured as separate structures, and then assembled by any connection method such as adhesive bonding or welding.

[0123] Please refer to the reference. Figures 1 to 6In one embodiment of this application, the glue applicator 100 is provided with a glue passage 50, which has a glue outlet 57. The glue applicator 100 is also provided with a guide arc surface 31 and a relief slope 33 arranged back-to-back in a first direction, and the glue outlet 57 is located between the guide arc surface 31 and the relief slope 33. The guide arc surface 31 is configured as an outwardly convex arc surface, and the center lines of the relief slope 33 and the glue outlet 57 are set at an angle. In the glue dispensing direction of the glue outlet 57, the distance between the relief slope 33 and the guide arc surface 31 decreases. The angle between the plane containing the relief slope 33 and the glue outlet 57 is defined as α, satisfying the relationship: 60°≤α≤80°. The dispensing port 57 includes a first side 551 and a second side 553 spaced apart in the first direction. The first side 551 is closer to the guide arc surface 31 than the second side 553. A clearance slope 33 is spaced apart from the second side 553 at one end near the dispensing port 57. The dispensing head 100 also has a transition wall 34 connecting the clearance slope 33 and the second side 553. In the first direction, the distance between the first side 551 and the second side 553 is defined as L1, and the distance between the end of the clearance slope 33 connected to the transition wall 34 and the second side 553 is defined as L2, satisfying the relationship: 0.3 ≤ L2 / L1 ≤ 0.7. The transition wall 34 is configured as a convex arc surface, and the radius of the transition wall 34 is equal to the radius of the guide arc surface 31. The end of the guide arc surface 31 near the first side 551 is connected to the first side 551. Both the first side 551 and the second side 553 are linear and parallel. The dispensing port 57 includes a third side 555 and a fourth side 557 spaced apart in a second direction intersecting the first direction. The third side 555, the fourth side 557, the first side 551, and the second side 553 are arranged to enclose the dispensing port 57. The applicator head 100 also has two flat wall surfaces 35 spaced apart in the second direction. Both flat wall surfaces 35 are located between the guide arc surface 31 and the avoidance slope surface 33. The two flat wall surfaces 35 and the dispensing port 57 are located on the same plane, and one of the two flat wall surfaces 35 is connected to the third side 555, and the other is connected to the fourth side 557. One of the flat wall surfaces 35 is configured as a shortened plane 35A, and the other flat wall surface 35 is configured as a non-shortened plane 35B. In the second direction, the projected length of the shortened plane 35A is less than the projected length of the non-shortened plane 35B. Define the projected length of the shortened plane 35A as L3 and the projected length of the non-shortened plane 35B as L4, satisfying the following relationships: 0.1≤L3 / L4≤0.5, 0.1mm≤L3≤0.5mm.The applicator head 100 is also provided with two outwardly convex side arc surfaces 37 arranged back-to-back in a second direction. The shortened plane 35A and the non-shortened plane 35B are located between the two side arc surfaces 37. One side arc surface 37 connects the guide arc surface 31, the shortened plane 35A, and the avoidance slope 33, while the other side arc surface 37 connects the guide arc surface 31, the non-shortened plane 35B, and the avoidance slope 33. In the second direction, the projected length of the side arc surface 37 connected to the shortened plane 35A is greater than the projected length of the side arc surface 37 connected to the non-shortened plane 35B. The guide arc surface 31, the avoidance slope 33, and the ends of the two side arc surfaces 37 away from the glue outlet 57 are located on the same plane. The glue applicator 100 includes a base 10 and a nozzle 30. The base 10 has a connecting surface 11 and a first channel 51. The nozzle 30 protrudes from the connecting surface 11 and has a second channel 53. The second channel 53 and the first channel 51 are connected to form a glue passage 50. The end of the second channel 53 away from the first channel 51 has a glue outlet 57. A guide arc surface 31 and a relief slope 33 are both provided on the nozzle 30, and the ends of the guide arc surface 31 and the relief slope 33 away from the glue outlet 57 are both connected to the connecting surface 11. In the glue dispensing direction of the glue outlet 57, the cross-section of the glue passage 50 is reduced. The base 10 has a mounting hole 13 that penetrates the connecting surface 11 and the side away from the connecting surface 11. The base 10 and the nozzle 30 are an integral structure.

[0124] This application also proposes a coating device, which includes a coating head 100. The specific structure of the coating head 100 is as described in the above embodiments. Since this coating device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. In addition, the coating device may also include a frame, a glue container, a connecting pipe, and a pump body. The glue container and the coating head 100 can be disposed on the frame, the connecting pipe can connect the glue container and the glue inlet 55 of the coating head 100, and the pump body can be disposed on the connecting pipe. Thus, driven by the pump body, the glue in the glue container can be driven into the coating head 100 through the connecting pipe, and then flow out from the glue outlet 57 of the coating head 100. Further, the coating device may also include a conveyor line to transport the electrode sheet or other products that need to be coated through the conveyor line past the glue outlet 57 of the coating head 100. The conveyor line can be a belt conveyor or a roller conveyor.

[0125] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An applicator tip, characterized by, The glue applying head is provided with a glue passing channel, and the glue passing channel has a glue outlet; The glue applying head is further provided with a guide arc surface and an avoiding inclined surface which are oppositely arranged in the first direction, and the glue outlet is located between the guide arc surface and the avoiding inclined surface; The guide arc surface is arranged as an outward convex arc surface, the avoiding inclined surface and the center line of the glue outlet are arranged at an angle, and the distance between the avoiding inclined surface and the guide arc surface decreases in the glue outlet direction of the glue outlet.

2. The applicator tip of claim 1, wherein The angle between the plane where the avoiding inclined surface and the glue outlet are located is defined as α, and the relationship is 60°≤α≤80°.

3. The applicator tip of claim 1, wherein The glue outlet includes a first side edge and a second side edge which are oppositely arranged in the first direction, and the first side edge is closer to the guide arc surface than the second side edge; One end of the avoiding inclined surface close to the glue outlet is connected to the second side edge; Alternatively, one end of the avoiding inclined surface close to the glue outlet is arranged apart from the second side edge, and the glue applying head is further provided with a transition wall surface which connects the avoiding inclined surface and the second side edge.

4. The applicator tip of claim 3, wherein In the case that the glue applying head is provided with the transition wall surface, in the first direction, the distance between the first side edge and the second side edge is defined as L1, the distance between one end of the transition wall surface close to the avoiding inclined surface and the second side edge is defined as L2, and the relationship is 0.3≤L2 / L1≤0.7; And / or, the transition wall surface is arranged as an outward convex arc surface, and the radius of the transition wall surface is equal to the radius of the guide arc surface.

5. The applicator tip of claim 3, wherein One end of the guide arc surface close to the first side edge is connected to the first side edge; And / or, the first side edge and the second side edge are both linear and arranged in parallel.

6. The applicator tip of claim 3, wherein The glue outlet includes a third side edge and a fourth side edge which are oppositely arranged in a second direction intersecting the first direction, and the third side edge, the fourth side edge, the first side edge and the second side edge are arranged to enclose the glue outlet; The glue applying head is further provided with two flat wall surfaces which are oppositely arranged in the second direction, and both of the flat wall surfaces are located between the guide arc surface and the avoiding inclined surface; Both of the flat wall surfaces and the glue outlet are located in the same plane, and one of the flat wall surfaces is connected to the third side edge, and the other is connected to the fourth side edge.

7. The applicator tip of claim 6, wherein In the second direction, at least one of the flat wall surfaces is arranged as a shortened plane, and the projection length of the shortened plane in the second direction is defined as L3, and the relationship is 0.1㎜≤L3≤0.5㎜.

8. The applicator tip of claim 6, wherein the tip is formed from a material having a Shore A hardness of about 50 to about 90. One of the flat wall surfaces is arranged as a shortened plane, and the other is arranged as a non-shortened plane; In the second direction, the projection length of the shortened plane is smaller than the projection length of the non-shortened plane.

9. The applicator tip of claim 8, wherein the tip is formed from a material having a Shore A hardness of about 50 to about 90. In the second direction, the projection length of the shortened plane is defined as L3, and the projection length of the non-shortened plane is defined as L4, and the relationship is 0.1≤L3 / L4≤0.5; And / or, 0.1㎜≤L3≤0.5㎜.

10. The applicator tip of claim 8, wherein the tip is formed from a material having a Shore A hardness of about 50 to about 90. The glue applying head is further provided with two outward convex side curved surfaces arranged opposite to each other in the second direction, the shortening plane and the non-shortening plane are further located between the two side curved surfaces; One of the side curved surfaces is connected with the guide curved surface, the shortening plane and the avoiding inclined surface, and the other side curved surface is connected with the guide curved surface, the non-shortening plane and the avoiding inclined surface.

11. The applicator tip of claim 10, wherein the tip is formed from a material having a Shore A hardness of about 50 to about 90. In the second direction, the projection length of the side curved surface connected with the shortening plane is greater than the projection length of the side curved surface connected with the non-shortening plane; And / or, the guide curved surface, the avoiding inclined surface and the two side curved surfaces are located in the same plane away from the glue outlet end.

12. The applicator tip of any one of claims 1 to 11, wherein, The glue applying head comprises: a fixing seat provided with a connecting surface and a first channel; and a glue nozzle protruding from the connecting surface, the glue nozzle is provided with a second channel, the second channel and the first channel are in communication and configured as the glue applying channel, the second channel has the glue outlet away from the first channel end; the guide curved surface and the avoiding inclined surface are both arranged in the glue nozzle, and the guide curved surface and the avoiding inclined surface are both connected with the connecting surface away from the glue outlet end.

13. The applicator tip of claim 12, wherein the tip is formed from a material having a Shore A hardness of about 50 to about 90. In the glue outlet direction, the channel cross section of the glue applying channel is arranged in a decreasing manner; And / or, the fixing seat is provided with a mounting hole, the mounting hole penetrates through the connecting surface and the side away from the connecting surface of the fixing seat; And / or, the fixing seat and the glue nozzle are in an integrated structure.

14. A gluing apparatus characterized by, The glue applying head comprises the glue applying head according to any one of claims 1 to 13. The glue applying head comprises the glue applying head according to any one of claims 1 to 13.

Images