Dispensing coating device, dispensing coating system and battery production line

Abstract

The utility model relates to the technical field of manufacturing equipment of lithium batteries, and discloses a coating device and a coating system for dispensing and a battery production line, which can adjust the coating flow and improve the uniformity of dispensing and coating. The coating device comprises a head structure, a fluid channel is formed in the head structure, and a feeding port, a discharging port and a mounting port are formed in the head structure of the fluid channel; at least part of the adjusting rod is arranged in the fluid channel in a penetrating mode through the mounting opening, and a gap is formed between the adjusting rod and the fluid channel; and the driving mechanism is connected with the adjusting rod, and the driving mechanism is suitable for adjusting the relative position of the adjusting rod in the fluid channel so as to adjust the section size of the gap.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing equipment, and in particular to a dispensing coating device, a coating system and a battery production line. Background Art

[0002] In the coating process of the positive electrode of lithium batteries, the positive electrode slurry needs to be evenly coated on the aluminum foil, and an insulating coating (usually ceramic, called dispensing process) is added on both sides of the edge of the slurry coating. If the insulating coating protection is lacking, burrs, curling, misalignment and other undesirable phenomena will appear. During the production and use of lithium batteries, the edges of the positive and negative electrodes are affected by these undesirable phenomena, which are easy to contact and short-circuit. In severe cases, it may even cause the lithium battery to catch fire and explode.

[0003] In the glue dispensing process, two glue dispensing devices are required to apply glue slurry to both sides of the electrode. However, in the related art, the flow rate of glue slurry input into each glue dispensing device is difficult to accurately control, which easily makes the flow rate of glue slurry of the glue dispensing devices on both sides of the electrode inconsistent, resulting in uneven coating on both sides. Utility Model Content

[0004] In view of this, the technical problem to be solved by the utility model is to overcome the defect in the prior art that the flow rate of the glue slurry input into the glue dispensing device is difficult to accurately control, resulting in uneven coating on both sides of the electrode, and a glue dispensing coating device and coating system are provided.

[0005] In the first aspect, the utility model provides a dispensing coating device, comprising: a head structure, a fluid channel is formed in the head structure, and the fluid channel is formed with a feed port, a discharge port and an installation port on the head structure; an adjusting rod, at least partially passed through the installation port in the fluid channel, and a gap is formed between the adjusting rod and the fluid channel; a driving mechanism, connected to the adjusting rod, and the driving mechanism is suitable for adjusting the relative position of the adjusting rod in the fluid channel to adjust the cross-sectional size of the gap.

[0006] Optionally, the fluid channel includes a feed section, a discharge section and an adjustment section, the feed section forms a feed port on the head structure, the discharge section forms a discharge port on the head structure, the adjustment section is connected between the feed section and the discharge section, and the installation port is connected to the side of the adjustment section; the adjustment rod is inserted into the adjustment section and forms the above-mentioned gap with the adjustment section.

[0007] Optionally, the fluid channel includes a feed section, a discharge section and an adjustment section, the feed section forms a feed port on the head structure, the discharge section forms a discharge port on the head structure, the first end of the adjustment section forms a mounting port on the head structure, the second end of the adjustment section is connected to the discharge section, and the feed section is connected to the side of the adjustment section; the adjustment rod is inserted into the adjustment section, and an annular gap is formed between the adjustment rod and the adjustment section; the driving mechanism is suitable for adjusting the axial cross-sectional size of the gap.

[0008] Optionally, the second end of the adjusting section is provided with a neck portion, and the end of the adjusting rod comprises a matching bevel; the matching bevel is suitable for closing the fluid channel when abutting against the inner wall of the neck portion.

[0009] Optionally, the drive mechanism comprises a cylinder and a piston, and a piston rod of the piston forms the adjustment rod.

[0010] Optionally, the end wall of the rodless cavity of the cylinder body is provided with a position adjustment member, which is suitable for adjusting the movement stroke of the piston in the cylinder body to adjust the relative position of the adjustment rod in the adjustment section.

[0011] Optionally, the head structure includes a first part and a second part connected to each other, the feeding section and the adjusting section are arranged in the first part, the discharging section is arranged between the connecting surfaces of the first part and the second part, and the connecting surface of the first part and the second part is an inclined surface.

[0012] In a second aspect, the utility model further provides a glue dispensing coating system, comprising: a plurality of glue dispensing coating devices as described above.

[0013] Optionally, the glue dispensing coating system further includes: a feeding device; and a constant pressure valve, wherein the constant pressure valve is connected between the feeding device and the feed ports of the plurality of glue dispensing coating devices.

[0014] Optionally, the dispensing coating system further includes a reflux pipeline, and the reflux pipeline is connected between the feeding device and the constant pressure valve.

[0015] In a third aspect, the utility model further provides a battery production line, including: a dispensing coating system as described above.

[0016] In the technical solution of the utility model, the driving mechanism changes the cross-sectional size of the gap by adjusting the relative position of the adjusting rod in the fluid channel, thereby changing the flow rate of the dispensing slurry in the fluid channel. When the flow rates of the dispensing slurry input into different dispensing coating devices are different, the flow rate in the dispensing coating device can be adjusted by the driving mechanism to compensate for the difference in the flow rates of the dispensing slurry input into each dispensing coating device, thereby improving the uniformity of the dispensing on both sides of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a dispensing coating device according to an embodiment of the utility model;

[0019] Figure 2 This is a front view of a glue dispensing coating device according to an embodiment of the utility model;

[0020] Figure 3 for Figure 2 A cross-sectional view of

[0021] Figure 4 for Figure 3 A is a partial enlarged schematic diagram;

[0022] Figure 5 A side view of a dispensing coating device according to an embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of a dispensing coating device in an application state according to an embodiment of the utility model;

[0024] Figure 7 The present invention is a schematic structural diagram of a dispensing coating system according to an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Glue dispensing device; 11. First part; 12. Second part; 13. Feed section; 14. Adjustment section; 141. Neck contraction section; 15. Discharge section; 16. Cylinder body; 161. First air inlet; 162. Second air inlet; 17. Piston; 171. Adjustment rod; 18. Position adjustment member; 181. Adjustment section; 2. Feed assembly; 3. Screw pump; 4. Constant pressure valve; 5. Reflux line; 6. Substrate; 7. Coating roller; 8. Die head. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.

[0029] According to an embodiment of the present utility model, on the one hand, a dispensing coating device 1 is provided, including a head structure, a driving mechanism and an adjusting rod 171 .

[0030] Specifically, a fluid channel is formed in the head structure, and the fluid channel is formed with a feed port, a discharge port and an installation port on the head structure; an adjusting rod 171 is at least partially inserted into the fluid channel through the installation port, and a gap is formed between the adjusting rod 171 and the fluid channel; a driving mechanism is connected to the adjusting rod 171, and the driving mechanism is suitable for adjusting the relative position of the adjusting rod 171 in the fluid channel to adjust the cross-sectional size of the gap.

[0031] In this embodiment, the adjustment rod 171 is inserted into the fluid channel and forms a gap with the fluid channel. The glue slurry enters the fluid channel from the feed port, flows through the gap, and then flows out from the discharge port to the electrode to be glued to form an insulating coating. Utilizing the technical solution of the utility model, the driving mechanism changes the cross-sectional size of the gap by adjusting the relative position of the adjustment rod 171 in the fluid channel, thereby changing the flow rate of the glue slurry in the fluid channel. When the flow rates of the glue slurry input into different glue coating devices 1 are different, the flow rate in the glue coating device 1 can be adjusted by the driving mechanism to compensate for the difference in the flow rates of the glue slurry input into each glue coating device 1, thereby improving the uniformity of glue on both sides of the electrode.

[0032] Further, such as Figures 1 to 6 As shown, the fluid passage includes a feed section 13, a discharge section 15 and an adjustment section 14. The feed section 13 forms a feed port on the head structure, the discharge section 15 forms a discharge port on the head structure, the first end of the adjustment section 14 forms a mounting port on the head structure, the second end of the adjustment section 14 is connected to the discharge section 15, and the feed section 13 is connected to the side of the adjustment section 14.

[0033] Furthermore, at least part of the structure of the adjusting rod 171 is inserted into the adjusting section 14 through the installation opening, and an annular gap is formed between the adjusting rod 171 and the adjusting section 14, and the connection between the feeding section 13 and the adjusting section 14 is connected to the gap.

[0034] Furthermore, the driving mechanism is arranged on the outside of the head structure and connected to the adjusting rod 171. The driving mechanism is suitable for adjusting the relative position of the adjusting rod 171 in the adjusting section 14 to adjust the axial length of the annular gap along the adjusting section 14, thereby adjusting the axial cross-sectional size of the gap.

[0035] It can be understood that in this embodiment, the dispensing slurry (such as ceramic slurry) flows into the feed section 13 of the fluid channel from the feed port, flows through the annular gap, flows into the discharge section 15 from the second end of the adjustment section 14, and finally flows out from the discharge port of the discharge section 15 and is coated on the electrode to be dispensed to form an insulating coating.

[0036] It should be noted that the flow formula of liquid flowing through the annular gap is: Where Q is the flow rate of the annular gap; l is the axial length of the annular gap. In other words, the flow rate of the liquid is inversely proportional to the axial length of the annular gap.

[0037] In this embodiment, an annular gap is formed between the adjusting rod 171 and the adjusting section 14, and the glue dispensing slurry enters the annular gap from the feeding section 13 and finally flows out from the discharging section 15. Therefore, in the glue dispensing coating device 1 of the utility model, the flow rate of the glue dispensing slurry is inversely proportional to the axial length of the annular gap. In addition, the driving mechanism adjusts the axial length of the annular gap along the adjusting section 14 by adjusting the relative position of the adjusting rod 171 in the adjusting section 14, thereby realizing the flow rate adjustment of the glue dispensing slurry.

[0038] Further, such as Figure 4 , the second end of the adjustment section 14 is provided with a constricted neck 141, and the end of the adjustment rod 171 includes a matching bevel; the matching bevel is suitable for closing the fluid channel when it abuts against the inner wall of the constricted neck 141. Specifically, the driving mechanism is suitable for adjusting the relative position of the adjustment rod 171 in the adjustment section 14, so that the matching bevel at the end of the adjustment rod 171 abuts against the inner wall of the constricted neck 141 to achieve the closure of the fluid channel. In addition, the driving mechanism can make the end of the adjustment rod 171 away from the constricted neck 141 to achieve the opening of the fluid channel. In other words, the driving mechanism can not only drive the adjustment rod 171 to achieve the opening and closing of the fluid channel, but also adjust the flow rate of the dispensing slurry, and the control method and structure are relatively simple and easy to implement.

[0039] In this embodiment, the necking portion 141 may be configured as a conical structure, and accordingly, the end of the adjusting rod 171 may also be configured as a conical structure matching the necking portion 141 to form the above-mentioned matching inclined surface. Alternatively, in some embodiments not shown in the figures, a step surface may also be formed inside the necking portion 141, and the radial dimension of the end of the adjusting rod 171 is greater than the radial dimension of the inner wall of the step surface. When the end of the adjusting rod 171 abuts against the step surface, the fluid channel is closed.

[0040] Specifically, it can be achieved, such as Figure 3 As shown, the driving mechanism includes a cylinder 16 and a piston 17, and the piston rod of the piston 17 forms the adjusting rod 171. The piston rod of the piston 17 is inserted into the adjusting section 14 through the installation opening, and the position of the piston 17 in the cylinder 16 is adjusted, so that the matching inclined surface of the adjusting rod 171 is in contact with the neck 141, or is away from the neck 141.

[0041] Specifically, Figure 1 and Figure 3 As shown, a first air inlet 161 and a second air inlet 162 are respectively provided on the side walls of the top and bottom of the cylinder body 16. The first air inlet 161 is connected to the rodless chamber of the cylinder body 16. When the compressed gas enters the rodless chamber from the first air inlet 161, the piston 17 is pushed to the bottom of the cylinder body 16. At this time, the end of the adjusting rod 171 cooperates with the neck 141, so that the fluid channel is closed. The second air inlet 162 is connected to the rod chamber of the cylinder body 16. When the compressed gas enters the rod chamber from the second air inlet 162, the piston 17 is pushed to the top of the cylinder body 16. At this time, the end of the adjusting rod 171 is away from the neck 141, so that the fluid channel is opened.

[0042] Furthermore, in some embodiments, Figure 3 The end wall of the rodless cavity of the cylinder body 16 is provided with a position adjustment member 18, which is suitable for adjusting the movement stroke of the piston 17 in the cylinder body 16 to adjust the relative position of the adjustment rod 171 in the adjustment section 14, thereby adjusting the axial length of the above-mentioned gap to achieve the adjustment of the flow rate in the dispensing coating device 1.

[0043] In this embodiment, if Figure 3As shown, the position adjustment member 18 includes an adjustment portion 181, and the adjustment portion 181 extends from the top of the cylinder body 16 into the rodless cavity, and the position adjustment member 18 is suitable for adjusting the length of the adjustment portion 181 extending into the rodless cavity. In the driving mechanism configured in this way, when the second air inlet 162 is introduced with compressed gas, the piston 17 cannot move further when it moves to abut against the adjustment portion 181, so that the movement stroke of the piston 17 in the cylinder body 16 is limited between the adjustment portion 181 and the bottom of the cylinder body 16. By adjusting the length of the adjustment portion 181 extending into the rodless cavity, the movement stroke of the piston 17 in the cylinder body 16 can be adjusted, and then the relative position of the adjustment rod 171 formed on the piston 17 in the adjustment section 14 can be adjusted, and finally the flow rate can be adjusted.

[0044] Exemplarily, the adjusting portion 181 of the position adjusting member 18 can be a threaded section, and is threadedly connected to the top of the cylinder body 16. Alternatively, the position adjusting member 18 can be a micrometer, and the movable scale of the micrometer forms the above-mentioned adjusting portion 181, which has a simple structure and is easy to implement.

[0045] Furthermore, in this embodiment, the position adjustment member 18, the driving mechanism, the adjustment rod 171 and the head structure are sequentially connected and coaxially arranged, and the entire structure is integrated, which simplifies the connection structure and facilitates cleaning.

[0046] Furthermore, the head structure includes a first part 11 and a second part 12 connected to each other, a feed section 13 and an adjustment section 14 are arranged on the first part 11, and a discharge section 15 is arranged between the connection surfaces of the first part 11 and the second part 12. Dividing the head structure into two parts is convenient for opening the fluid channel and processing.

[0047] Among them, the position adjustment member 18, the driving mechanism, the adjusting rod 171 and the first part 11 are coaxially arranged, and the connection surface of the first part 11 toward the second part 12 is an inclined surface, and correspondingly, the connection surface of the second part 12 toward the first part 11 is also an inclined surface, and the discharge section 15 is formed on the inclined surface of the first part 11 and the second part 12. It can be understood that the inclined surface in this embodiment refers to the inclination of the connection surface relative to the axis of the position adjustment member 18, the driving mechanism, the adjusting rod 171 and the first part 11.

[0048] like Figure 6 As shown, in actual application, the substrate 6 is stretched on the coating roller 7, and the coating roller 7 drives the substrate 6 to move, and the coating device for dispensing glue and the die head 8 for coating the positive electrode slurry are both located on the same side of the substrate 6. When the substrate 6 moves, the dispensing glue of the substrate 6 and the coating of the positive electrode slurry are realized. In the technical solution of the utility model, the discharging section 15 is arranged on the inclined surface, so that the coating device 1 for dispensing glue can be placed vertically, improve the space utilization rate, and avoid interference with the die head 8.

[0049] Exemplarily, in this embodiment, the discharge section 15 is provided on the connection surface of the second part 12. Alternatively, an illustrative gasket is provided between the first part 11 and the second part 12, and the discharge section 15 is provided on the gasket. Alternatively, the discharge section 15 may also be provided on the connection surface of the first part 11.

[0050] The discharge section 15 is a straight flat channel section, one end of which is connected to the second end of the adjustment section 14, and the other end forms the above-mentioned discharge port. It can be understood that the discharge section 15 is also inclined, and the discharge port is formed between the first part 11 and the second part 12. Exemplarily, the first part 11 and the second part 12 can be bolted to facilitate disassembly.

[0051] In some embodiments not shown in the figures, the fluid channel includes a feed section 13, a discharge section 15 and an adjustment section 14. The feed section 13 forms a feed port on the head structure, the discharge section 15 forms a discharge port on the head structure, the two ends of the adjustment section 14 are respectively connected to the feed section 13 and the discharge section 15, and the installation port is connected to the side of the adjustment section 14.

[0052] Furthermore, at least part of the structure of the adjusting rod 171 is inserted into the adjusting section 14 through the installation opening, and the above-mentioned gap is formed between the adjusting rod 171 and the adjusting section 14. The feeding section 13 and the discharging section 15 are connected through the gap.

[0053] Furthermore, the driving mechanism is connected to the head structure through the mounting opening, and the driving mechanism is connected to the adjusting rod 171 , and the driving mechanism is suitable for adjusting the relative position of the adjusting rod 171 in the adjusting section 14 to adjust the cross-sectional size of the gap.

[0054] It can be understood that, in this embodiment, the above-mentioned gap is formed between the end of the adjusting rod 171 and the inner wall of the adjusting section 14. The driving mechanism can change the cross-sectional size of the gap by changing the distance between the end of the adjusting rod 171 and the inner wall of the adjusting section 14, thereby changing the flow rate of the dispensing slurry in the fluid channel.

[0055] Exemplarily, the driving mechanism includes a position adjustment member 18 and an adjustment rod 171, wherein the adjustment rod 171 is telescopically arranged on the position adjustment member 18, and the position adjustment member 18 is suitable for driving the adjustment rod 171 to extend or shorten toward the adjustment section 14 to adjust the distance between the end of the adjustment rod 171 and the inner wall of the adjustment section 14, thereby adjusting the cross-sectional size of the gap.

[0056] According to an embodiment of the utility model, on the other hand, a dispensing coating system is also provided, comprising a plurality of dispensing coating devices 1 as described in the above embodiment. When the dispensing coating system inputs a difference in the flow rate of the dispensing slurry into the plurality of dispensing coating devices 1, the flow rate in the dispensing coating device 1 can be adjusted by a driving mechanism to compensate for the difference in the flow rate of the dispensing slurry input into each dispensing coating device 1, thereby improving the uniformity of dispensing.

[0057] Further, such as Figure 7 As shown, the glue dispensing coating system also includes a feeding device and a constant pressure valve 4, and the constant pressure valve 4 is connected between the feeding device and the feed ports of multiple glue dispensing coating devices 1. In this arrangement, the feeding device conveys the glue dispensing slurry to the constant pressure valve 4, and the constant pressure valve 4 inputs the glue dispensing slurry into each glue dispensing coating device 1 after stabilizing the pressure, so that the flow rate input into each glue dispensing coating device 1 has a certain stability to avoid excessive differences, so as to further ensure the uniformity of glue dispensing.

[0058] Specifically, the feeding device includes a feeding assembly 2 and a screw pump 3, and the screw pump 3 is connected between the feeding assembly 2 and the constant pressure valve 4. The glue dispensing slurry is stored in the feeding assembly 2, and the screw pump 3 pumps out the glue dispensing slurry in the feeding assembly 2 and inputs it to the constant pressure valve 4.

[0059] It should be noted that the glue dispensing coating system of the present invention includes a main pipeline and multiple branch pipelines, the main pipeline is connected between the feeding assembly 2, the screw pump 3 and the constant pressure valve 4, and the multiple branch pipelines are connected between the constant pressure valve 4 and multiple glue dispensing coating devices 1. Among them, each branch pipeline is connected and communicated with the feed port on the head structure respectively to input the glue dispensing slurry into the fluid channel.

[0060] In actual application scenarios, the flow rate in the main pipeline can be controlled by the screw pump 3, while the branch pipelines are affected by different pipeline lengths, different flow channel processing and installation accuracy, etc., which makes the pressure loss in each fluid channel uneven, resulting in uneven flow in each branch pipeline, affecting the final coating size of the insulating coating. By using the technical solution of the utility model, the flow in each branch pipeline is initially controlled by setting a constant pressure valve 4, and then the flow rate in the dispensing coating device 1 is further controlled by the driving mechanism and the adjusting rod 171, so as to compensate for the pressure loss in each branch pipeline, improve the consistency of the insulating coating size, and ensure the uniformity of the coating.

[0061] On the other hand, in actual application, if the coating is suspended for a long time, the dispensing slurry is easy to settle in the pipeline to form larger particles. When working again, the large particles of slurry are easy to form scratches, pits and other defects on the surface of the substrate 6, affecting the dispensing quality and may even cause pipeline blockage.

[0062] like Figure 7The dispensing coating system of the present invention further includes a reflux pipeline 5, which is connected between the feeding device and the constant pressure valve 4. Specifically, the reflux pipeline 5 is connected between the reflux port of the feeding assembly 2 and the pressure relief port of the constant pressure valve 4.

[0063] When the fluid channel is closed, the screw pump 3 continues to work, causing the pressure in the main pipeline and the branch pipeline to increase. When the pressure is greater than the working pressure of the constant pressure valve 4, the pressure relief port of the constant pressure valve 4 opens, and the dispensing slurry enters the reflux pipeline 5 through the pressure relief port, and flows back to the feeding assembly 2 through the reflux port, realizing the circulation of the dispensing slurry in the pipeline, thereby avoiding deposition.

[0064] According to an embodiment of the present utility model, on another aspect, a battery production line is provided, comprising a dispensing coating system as described in the above embodiment.

[0065] Because the battery production line of the present invention includes the glue dispensing coating system of the above-mentioned embodiment, it has the same technical effect as the glue dispensing coating system of the present invention, and will not be described in detail here.

[0066] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A dispensing coating device, characterized in that: include: A head structure, wherein a fluid channel is formed in the head structure, and the fluid channel is formed with a feed port, a discharge port and a mounting port on the head structure; an adjusting rod (171), at least partly passing through the installation opening and being arranged in the fluid channel, and a gap is formed between the adjusting rod (171) and the fluid channel; A driving mechanism is connected to the adjusting rod (171), and the driving mechanism is suitable for adjusting the relative position of the adjusting rod (171) in the fluid channel to adjust the cross-sectional size of the gap.

2. The glue dispensing coating device according to claim 1, characterized in that: The fluid channel comprises a feed section (13), a discharge section (15) and an adjustment section (14); the feed section (13) forms the feed port on the head structure; the discharge section (15) forms the discharge port on the head structure; the adjustment section (14) is connected between the feed section (13) and the discharge section (15); and the installation port is connected to the side of the adjustment section (14); The adjusting rod (171) is inserted into the adjusting section (14) and forms the gap with the adjusting section (14).

3. The glue dispensing coating device according to claim 1, characterized in that: The fluid channel comprises a feed section (13), a discharge section (15) and an adjustment section (14); the feed section (13) forms the feed port on the head structure; the discharge section (15) forms the discharge port on the head structure; the first end of the adjustment section (14) forms the mounting port on the head structure; the second end of the adjustment section (14) is in communication with the discharge section (15); and the feed section (13) is in communication with a side portion of the adjustment section (14); The adjusting rod (171) is inserted into the adjusting section (14) and forms an annular gap with the adjusting section (14); the driving mechanism is suitable for adjusting the axial cross-sectional dimension of the gap.

4. The glue dispensing coating device according to claim 3, characterized in that: The second end of the adjustment section (14) is provided with a constricted portion (141), and the end of the adjustment rod (171) comprises a matching bevel; the matching bevel is suitable for closing the fluid channel when abutting against the inner wall of the constricted portion (141).

5. The glue dispensing coating device according to claim 3, characterized in that: The driving mechanism comprises a cylinder (16) and a piston (17), and the piston rod of the piston (17) forms the adjusting rod (171).

6. The glue dispensing coating device according to claim 5, characterized in that: The end wall of the rodless chamber of the cylinder body (16) is provided with a position adjustment member (18), and the position adjustment member (18) is suitable for adjusting the movement stroke of the piston (17) in the cylinder body (16) to adjust the relative position of the adjustment rod (171) in the adjustment section (14).

7. The glue dispensing coating device according to any one of claims 2 to 6, characterized in that: The head structure comprises a first part (11) and a second part (12) connected to each other, the feeding section (13) and the adjusting section (14) are arranged on the first part (11), and the discharging section (15) is arranged between the connecting surfaces of the first part (11) and the second part (12), and the connecting surface of the first part (11) and the second part (12) is an inclined surface.

8. A dispensing coating system, characterized in that: include: A plurality of glue dispensing coating devices (1) as described in any one of claims 1-7.

9. The dispensing coating system according to claim 8, characterized in that: The dispensing coating system also includes: Feeding device; A constant pressure valve (4), the constant pressure valve (4) being connected between the feeding device and the feeding ports of the plurality of glue dispensing coating devices (1).

10. The dispensing coating system according to claim 9, characterized in that: The glue dispensing coating system further comprises a return pipeline (5), wherein the return pipeline (5) is connected between the feeding device and the constant pressure valve (4).

11. A battery production line, characterized in that: include: A dispensing coating system as described in any one of claims 8 to 10.

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