Coating device and battery piece series welding machine

Abstract

The utility model discloses a coating device and a battery piece series welding machine. The coating device comprises a coating body which is provided with a liquid storage tank, and the liquid storage tank is suitable for containing coating liquid; the adsorption part is arranged in the liquid storage tank, the adsorption part is provided with a coating end, the coating end is flush with the opening end of the liquid storage tank or protrudes out of the opening end, and the adsorption part is suitable for adsorbing the coating liquid; and the coating end can be in contact with a workpiece so as to coat the workpiece with the coating liquid. According to the coating device, pressure does not need to be applied to the workpiece, and therefore the workpiece can be prevented from being bent due to stress.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic panel processing equipment, and more specifically, to a coating device and a battery cell string welding machine. Background Art

[0002] In related technologies, the welding surface of the welding ribbon generally needs to be coated with flux before welding. Currently, the welding ribbon is generally pressed directly into a groove filled with flux. This method can easily cause the welding ribbon to bend under stress, thereby affecting the subsequent welding effect.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a coating device.

[0005] According to a first aspect of the present invention, a coating device is provided. The coating device comprises:

[0006] The coating body is provided with a liquid storage tank, and the liquid storage tank is suitable for containing the coating liquid;

[0007] An adsorbent, the adsorbent being disposed in the liquid reservoir, the adsorbent having a coating end, the coating end being flush with the open end of the liquid reservoir or protruding from the open end, the adsorbent being adapted to adsorb the coating liquid;

[0008] The coating end is capable of contacting a workpiece to coat the workpiece with the coating liquid.

[0009] Optionally, a discharge pipe is further included, and the discharge pipe is connected to the liquid storage tank.

[0010] Optionally, the discharge pipe is connected to the bottom wall of the liquid storage tank.

[0011] Optionally, a first liquid inlet pipe is further included, and the first liquid inlet pipe is connected to the bottom of the liquid storage tank.

[0012] Optionally, it further includes a first liquid level mechanism, which is connected to the coating body and is suitable for detecting the coating liquid in the liquid storage tank.

[0013] Optionally, the first liquid level mechanism includes a first liquid level tube, the bottom end of the first liquid level tube is connected to the bottom of the liquid storage tank, and the liquid level in the first liquid level tube can be flush with the liquid level of the liquid storage tank.

[0014] Optionally, the first liquid level mechanism further includes a liquid level gauge, which is connected to the first liquid level tube and can detect the liquid level of the first liquid level tube.

[0015] Optionally, a liquid storage tank is further included, which is connected to the liquid storage tank and can transport the coating liquid to the liquid storage tank.

[0016] Optionally, it also includes a first liquid level mechanism and a solenoid valve. The first liquid level mechanism is suitable for detecting the coating liquid in the liquid storage tank. The solenoid valve is electrically connected to the first liquid level mechanism. The liquid storage tank is connected to the liquid storage tank through the solenoid valve. The first liquid level mechanism can send a signal to the solenoid valve to enable the solenoid valve to open or close.

[0017] Optionally, the liquid storage tank is further provided with a second liquid level mechanism, and the second liquid level mechanism is suitable for detecting the coating liquid in the liquid storage tank.

[0018] According to a second aspect of the present application, a cell stringer is provided, which includes the coating device of the above embodiment.

[0019] One of the technical effects of the present application is that the coating body is provided with a liquid storage tank, and the adsorption element is provided in the liquid storage tank. The coating end of the adsorption element is flush with the open end of the liquid storage tank, or protrudes from the open end. The adsorption element can adsorb the coating liquid, and the workpiece can contact the coating end of the adsorption element, so that the surface of the workpiece can be coated with the coating liquid. The coating device of the present application does not need to apply pressure to the workpiece, thereby avoiding the workpiece from being bent under force.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 It is a schematic diagram of the partial structure of a coating device according to an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the partial structure of a coating device according to another embodiment of the present application.

[0024] Figure 3 This application Figure 1 A side view of the coating apparatus is shown.

[0025] Figure 4 yes Figure 3 A rear view of the coating apparatus is shown.

[0026] Figure 5 yes Figure 3A left side view of the coating apparatus is shown.

[0027] Figure 6 It is a structural schematic diagram of a liquid storage tank according to an embodiment of the present application.

[0028] Figure 7 This is a schematic diagram of the solenoid valve structure of an embodiment of the present application.

[0029] Figure 8 yes Figure 7 A side view of a solenoid valve is shown.

[0030] Reference numerals:

[0031] 1. Coating body; 11. Liquid storage tank; 12. First liquid inlet pipe; 13. Second connecting pipe; 2. Adsorption element; 3. Discharge pipe; 4. First connecting pipe; 5. First liquid level mechanism; 51. First liquid level pipe; 52. Liquid level gauge; 53. Third connecting pipe; 54. Fourth connecting pipe; 6. Liquid storage tank; 61. Second liquid level mechanism; 62. Liquid infusion pipe; 63. Second liquid inlet pipe; 64. Pressure gauge; 7. Solenoid valve; 71. Air source; 72. Pressure gauge; 73. Valve body; 74. First air inlet; 75. Second air inlet; 76. Second mounting seat; 8. First mounting seat; 9. Workpiece. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] According to one embodiment of the present application, a coating device is provided. Figures 1 to 8As shown, the coating device includes a coating body 1, which is provided with a liquid storage tank 11, and the liquid storage tank 11 is suitable for containing the coating liquid; an adsorption component 2, which is arranged in the liquid storage tank 11, and the adsorption component 2 has a coating end, and the coating end is flush with the open end of the liquid storage tank 11, or protrudes from the open end, and the adsorption component 2 is suitable for adsorbing the coating liquid; wherein, the coating end can contact the workpiece 9 to coat the workpiece 9 with the coating liquid.

[0038] In this example, the coating body 1 is provided with a liquid storage tank 11, and the adsorbent 2 is provided in the liquid storage tank 11. The coating end of the adsorbent 2 is flush with the open end of the liquid storage tank 11, or protrudes from the open end. The adsorbent 2 can adsorb the coating liquid, and the workpiece 9 can contact the coating end of the adsorbent 2, so that the surface of the workpiece 9 can be coated with the coating liquid. The coating device of the present application does not need to apply pressure to the workpiece 9, thereby avoiding bending of the workpiece 9 under stress. Moreover, by coating the adsorbent 2 in contact with the surface of the workpiece 9, the surface of the workpiece 9 can be coated more evenly. In addition, coating can be performed only on the surface of the workpiece 9 in contact with the adsorbent 2, so that the coating accuracy is higher to avoid wasting the coating liquid.

[0039] like Figure 2 As shown, for example, the coating liquid is flux, and the liquid storage tank 11 of the present application is suitable for containing flux, and the adsorbent 2 is at least partially contained in the liquid storage tank 11, and the adsorbent 2 can adsorb flux. The workpiece 9 can be a welding strip. When the welding strip needs to be coated with flux, the flux can be applied by contacting one side of the welding strip with the coating end of the adsorbent 2. By moving the welding strip along the surface of the coating end, the flux can be applied to one side of the welding strip. Of course, the workpiece 9 and the coating liquid of the present application can also be of other structures or types. Those skilled in the art can determine according to actual conditions, and no specific limitation is made here.

[0040] In this example, the upper end surface of the adsorption part 2 can be set as a coating end, and the coating end can be flush with the upper end surface of the liquid storage tank 11, or the coating end protrudes from the upper end surface of the liquid storage tank 11, so that the workpiece 9 can be coated with coating liquid after sliding along the coating end.

[0041] In this example, the adsorbent 2 has good water absorption. After the adsorbent 2 absorbs the coating liquid, the coating liquid can soak the coating end of the adsorbent 2, so that the coating end can have a good coating effect. For example, the adsorbent 2 can be a sponge, which has good water absorption, a simple structure, and low cost. In addition, the sponge is soft and can avoid scratching the workpiece 9. Of course, the adsorbent 2 can also be of other types, such as super elastic polymer water-absorbing resin, non-woven fabric, and other synthetic or natural materials. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0042] In one example, Figure 3 As shown, the coating device further includes a discharge pipe 3 , which is connected to the liquid storage tank 11 .

[0043] like Figure 3 As shown, the liquid reservoir 11 is also connected to a discharge pipe 3, which is suitable for discharging waste materials in the liquid reservoir 11. For example, when the type of coating liquid in the liquid reservoir 11 needs to be changed or the liquid reservoir 11 needs to be cleaned, the valve of the discharge pipe 3 can be opened to discharge the residual materials in the liquid reservoir 11 through the discharge pipe 3, which is efficient and saves time and effort.

[0044] In this example, the discharge pipe 3 can be connected to the bottom wall of the liquid storage tank 11. When unloading is required, the coating liquid can flow out of the discharge pipe 3 by gravity without the need for additional water pumping equipment, which can reduce costs.

[0045] In this example, the other end of the discharge pipe 3 can be connected to a recovery barrel, and the discharged coating liquid can flow out of the recovery barrel for secondary use.

[0046] In one example, Figure 4 As shown, the coating device further includes a first liquid inlet pipe 12 , which is connected to the bottom of the liquid storage tank 11 .

[0047] like Figure 4 As shown, in this example, the coating body 1 is further provided with a first liquid inlet pipe 12, which is connected to the bottom of the liquid reservoir 11. The first liquid inlet pipe 12 is used to replenish the coating liquid into the liquid reservoir 11. The first liquid inlet pipe 12 is connected to the bottom of the liquid reservoir 11. When the coating liquid is replenished into the liquid reservoir 11, the coating liquid can fill the liquid reservoir 11 relatively quickly, avoiding overflow of the liquid reservoir 11 due to obstruction by the adsorbent 2 when the liquid is poured from the top.

[0048] In one example, Figures 1 to 5 As shown, the coating device further includes a first liquid level mechanism 5 , which is connected to the coating body 1 , and is suitable for detecting the coating liquid in the liquid storage tank 11 .

[0049] In this example, the coating apparatus further includes a first liquid level mechanism 5, which is adapted to detect the remaining amount of coating liquid in the liquid reservoir 11. When the remaining amount of coating liquid in the liquid reservoir 11 is insufficient, a signal is generated to facilitate timely addition of coating liquid to the liquid reservoir 11 to ensure that the adsorption element 2 effectively coats the workpiece 9.

[0050] In one example, Figures 1 to 5As shown, the first liquid level mechanism 5 includes a first liquid level tube 51 , the bottom end of the first liquid level tube 51 is connected to the bottom of the liquid storage tank 11 , and the liquid level in the first liquid level tube 51 can be flush with the liquid level of the liquid storage tank 11 .

[0051] like Figure 4 and Figure 5 As shown, in this example, the first liquid level tube 51 can be arranged vertically. A first connecting tube 4 and a second connecting tube 13 are respectively provided on one side of the coating body 1. The first connecting tube 4 is connected to the upper part of the liquid storage tank 11, and the second connecting tube 13 is connected to the bottom of the liquid storage tank 11. A third connecting tube 53 and a fourth connecting tube 54 are respectively provided at both ends of the first liquid level tube 51. The third connecting tube 53 is connected to the first connecting tube 4, and the fourth connecting tube 54 is connected to the second connecting tube 13. When the coating liquid is added to the liquid storage tank 11, the coating liquid can flow from the second connecting tube 13 and then into the first liquid level tube 51 through the fourth connecting tube 54. The liquid level of the first liquid level tube 51 can be flush with the liquid level of the liquid storage tank 11, so that the remaining amount of coating liquid in the liquid storage tank 11 can be monitored through the first liquid level tube 51. When the remaining amount is insufficient, it is necessary to add it in time. When it is added to the preset value, the addition is stopped. The third communicating tube 53 is in communication with the first communicating tube 4 , and can balance the pressure in the first liquid level tube 51 with the external pressure, so as to more accurately measure the liquid level of the coating liquid in the liquid storage tank 11 .

[0052] The first connecting pipe 4 and the third connecting pipe 53 can be connected by a hose, and the fourth connecting pipe 54 and the second connecting pipe 13 can also be connected by a hose. The hose connection is convenient and can facilitate the arrangement of the first liquid level mechanism 5 and the coating body 1. Of course, the first connecting pipe 4 and the third connecting pipe 53, and the fourth connecting pipe 54 and the second connecting pipe 13 can also be connected by other types of pipes. Those skilled in the art can determine according to actual conditions and are not specifically limited here.

[0053] In one example, Figure 3 and Figure 5 As shown, the first liquid level mechanism 5 further includes a liquid level gauge 52 , which is connected to the first liquid level tube 51 , and can detect the liquid level of the first liquid level tube 51 .

[0054] like Figure 3 and Figure 5 As shown, the liquid level gauge 52 is connected to the first liquid level tube 51 . The liquid level gauge 52 can detect the liquid level of the first liquid level tube 51 , thereby detecting the remaining amount of the coating liquid in the liquid storage tank 11 .

[0055] In this example, the liquid level gauge 52 can be electrically connected to the control valve of the liquid storage tank 6. When the liquid level gauge 52 detects that there is insufficient coating liquid in the liquid storage tank 11, the liquid level gauge 52 can send an open electrical signal to the control valve, the control valve opens, and the liquid storage tank 6 can transport the coating liquid to the liquid storage tank 11; when the coating liquid in the liquid storage tank 11 reaches a preset position, the liquid level gauge 52 sends a close electrical signal to the control valve, and the control valve closes.

[0056] In this example, if Figures 1 to 5 As shown, the coating device further comprises a first mounting seat 8, and the coating body 1 and the first liquid level mechanism 5 are mounted on the first mounting seat 8. The first liquid level mechanism 5 is located on one side of the coating body 1.

[0057] In one example, Figure 6 As shown, the coating device further includes a liquid storage tank 6 , which is connected to the liquid storage tank 11 , and can transport the coating liquid to the liquid storage tank 11 .

[0058] like Figure 6 As shown in this example, the liquid storage tank 6 is used to store the coating liquid. The liquid storage tank 6 is provided with a liquid infusion tube 62, which is connected to the first liquid inlet tube 12 on the coating body 1, so that the liquid storage tank 6 can replenish the coating liquid to the liquid reservoir 11. The liquid infusion tube 62 and the first liquid inlet tube 12 can be connected by a hose. Of course, the liquid infusion tube 62 and the first liquid inlet tube 12 can also be connected by other types of tubes. Those skilled in the art will determine the connection based on actual conditions, and this is not specifically limited here.

[0059] In this example, a pressure mechanism is provided inside the liquid storage tank 6, which can apply pressure to the inner cavity of the liquid storage tank 6, thereby pressurizing the coating liquid in the liquid storage tank 6 into the liquid storage tank 11. For example, the pressure mechanism can be a gas-liquid booster device, a booster pump, etc., and those skilled in the art can determine it according to actual conditions, and it is not specifically limited here.

[0060] like Figure 6 As shown, the liquid storage tank 6 is also equipped with a pressure gauge 64. The pressure gauge 64 can be mounted on the upper end surface of the liquid storage tank 6. The pressure gauge 64 can be used to measure the pressure of the liquid storage tank 6. When the pressure is too high, the pressure mechanism is shut off to avoid damaging the pressure tank or causing the coating liquid to be delivered too quickly due to excessive pressure, resulting in the coating liquid level in the liquid storage tank 11 rising too quickly.

[0061] like Figure 6 As shown, in this example, the infusion tube 62 is located at the upper end of the liquid storage tank 6. The lower end of the liquid storage tank 6 is also provided with a drain port, which is suitable for discharging the waste liquid in the liquid storage tank 6.

[0062] In this example, the liquid storage tank 6 is further connected to a second liquid inlet pipe 63. The coating liquid or other liquids can be delivered into the liquid storage tank 6 through the second liquid inlet pipe 63. The second liquid inlet pipe 63 can be integrally formed with the liquid storage tank 6, or can be tightly connected to the liquid storage tank 6 via a screw connection or a snap connection. A funnel can also be provided at the open end of the second liquid inlet pipe 63 to facilitate material addition.

[0063] In one example, Figure 6 As shown, the liquid storage tank 6 is further provided with a second liquid level mechanism 61 , and the second liquid level mechanism 61 is suitable for detecting the coating liquid in the liquid storage tank 6 .

[0064] like Figure 6 As shown, in this example, the second liquid level mechanism 61 is provided on the outer wall of the liquid storage tank 6. The second liquid level mechanism 61 can detect the remaining amount of liquid in the liquid storage tank 6. When the liquid in the liquid storage tank 6 is too little, a signal can be sent to replenish the liquid.

[0065] In this example, the second liquid level mechanism 61 includes a second liquid level tube, the two ends of which are connected to the inner cavity of the liquid storage tank 6. The second liquid level tube is vertically arranged, with the upper end of the second liquid level tube connected to the upper portion of the inner cavity of the liquid storage tank 6, and the unfilled portion is also connected. The lower end of the second liquid level tube is connected to the bottom of the inner cavity of the oil storage tank. The liquid in the liquid storage tank 6 can flow from the lower end of the second liquid level tube into the second liquid level tube, so that the liquid level in the second liquid level tube is flush with the liquid level in the liquid storage tank 6, thereby detecting the remaining liquid in the liquid storage tank 6.

[0066] Among them, the upper end of the second liquid level tube is connected to the upper part of the inner cavity of the liquid storage tank 6, and the part not filled with liquid is connected, which can also balance the pressure in the second liquid level tube, so that the second liquid level tube can more accurately detect the liquid level height of the liquid in the liquid storage tank 6.

[0067] In one example, the coating device also includes a first liquid level mechanism 5 and a solenoid valve 7. The first liquid level mechanism 5 is suitable for detecting the coating liquid in the liquid storage tank 11. The solenoid valve 7 is electrically connected to the first liquid level mechanism 5. The liquid storage tank 6 is connected to the liquid storage tank 11 through the solenoid valve 7. The first liquid level mechanism 5 can send a signal to the solenoid valve 7 so that the solenoid valve 7 can be opened or closed.

[0068] In this example, the first liquid level mechanism 5 includes a liquid level gauge 52 and a first liquid level tube 51. The first liquid level tube 51 is connected to the liquid storage tank 11 and can be flush with the liquid level of the liquid storage tank 11 through the principle of a communicating vessel. The liquid level gauge 52 can detect the liquid level of the first liquid level tube 51. The liquid level gauge 52 is electrically connected to the solenoid valve 7. The liquid storage tank 6 is connected to the liquid storage tank 11 through the solenoid valve 7. The liquid level gauge 52 can send a signal to the solenoid valve 7. For example, when the coating liquid in the liquid storage tank 11 is insufficient, the liquid level gauge 52 can send a valve opening signal to the solenoid valve 7, the solenoid valve 7 can be opened, and the liquid storage tank 6 can transport the coating liquid into the liquid storage tank 11; when the coating liquid in the liquid storage tank 11 reaches a preset value, the liquid level gauge 52 can send a valve closing signal to the solenoid valve 7, the solenoid valve 7 is closed, and the liquid storage tank 6 stops transporting the coating liquid into the liquid storage tank 11. By electrically connecting and cooperating the first liquid level mechanism 5 and the electromagnetic valve 7 , the degree of automation of the coating device can be improved.

[0069] like Figure 7 and Figure 8 As shown, in this example, the solenoid valve 7 includes a valve body 73. One end opening of the valve body 73 is connected to the liquid delivery tube 62 of the liquid storage tank 6 via a flexible tube, and the other end opening is connected to the first liquid inlet tube 12 of the liquid storage tank 11 via a flexible tube. The valve body 73 can be closed to isolate the liquid storage tank 6 from the liquid storage tank 11. The valve body 73 can also be opened to connect the liquid storage tank 6 with the liquid storage tank 11 to deliver the coating liquid to the liquid storage tank 11.

[0070] In this example, the solenoid valve 7 further includes an air source 71. The valve body 73 is provided with a second air inlet 75. The air source 71 can communicate with the second air inlet 75 to supply air to the valve body 73, thereby controlling the opening or closing of the valve body 73. The air source 71 is provided with a first air inlet 74, through which air can be charged into the air source 71. The air source 71 is also connected to a pressure gauge 72, which can detect the pressure within the air source 71.

[0071] like Figure 7 and Figure 8 As shown, in this example, the solenoid valve 7 further includes a second mounting base 76. The valve body 73 is mounted on the second mounting base 76, and the air source 71 can be mounted on the side of the second mounting base 76 facing away from the valve body 73. The second mounting base 76 can be mounted on a plate or other structure. Those skilled in the art may determine the design based on actual circumstances, and this is not specifically limited here.

[0072] According to another aspect of the present application, a cell stringer is provided, which includes the coating device described in the above embodiment.

[0073] In this example, the coating device of the present application can apply flux to a soldering ribbon. The coating device of the present application does not require applying pressure to the workpiece 9, thereby preventing the workpiece 9 from bending under force. Furthermore, by applying the coating through contact between the adsorbent 2 and the surface of the workpiece 9, the surface of the workpiece 9 can be coated more evenly. Furthermore, coating can be performed only on the surface of the workpiece 9 that contacts the adsorbent 2, thereby achieving higher coating accuracy and avoiding waste of coating liquid.

[0074] In this example, the cell stringing machine further includes a loading device, which is suitable for taking materials from a silo. A glue printing device is suitable for screen printing glue on the surface of the silicon wafer. A first transfer mechanism is also provided between the glue printing device and the loading device. The first transfer mechanism is suitable for transferring the silicon wafer of the loading device to the glue printing device. A soldering tape processing device is located on one side of the glue printing device. The soldering tape processing device can cover the silicon wafer with glue on the surface with soldering tape. The soldering tape corresponds to the glue dispensing position so that the soldering tape can be bonded to the silicon wafer. A welding device is located on one side of the soldering tape processing device. The welding device is suitable for welding the soldering tape to the silicon wafer to prepare a cell. A detection device is suitable for detecting the cell after welding.

[0075] Among them, before the soldering ribbon processing device covers the soldering ribbon on the surface of the silicon wafer, the coating device of the present application can first coat the surface of the soldering ribbon with flux to facilitate soldering the soldering ribbon to the silicon wafer.

[0076] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0077] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A coating device, characterized in that: include: The coating body (1) is provided with a liquid storage tank (11), wherein the liquid storage tank (11) is suitable for containing the coating liquid; An adsorption member (2), the adsorption member (2) being arranged in the liquid storage tank (11), the adsorption member (2) having a coating end, the coating end being flush with the open end of the liquid storage tank (11) or protruding from the open end, the adsorption member (2) being suitable for adsorbing the coating liquid; The coating end is capable of contacting a workpiece (9) to coat the workpiece (9) with the coating liquid.

2. The coating device according to claim 1, characterized in that It also includes a discharge pipe (3), and the discharge pipe (3) is connected to the liquid storage tank (11).

3. The coating device according to claim 2, characterized in that The discharge pipe (3) is connected to the bottom wall of the liquid storage tank (11).

4. The coating device according to claim 1, characterized in that It also includes a first liquid inlet pipe (12), which is connected to the bottom of the liquid storage tank (11).

5. The coating device according to claim 1, characterized in that It also includes a first liquid level mechanism (5), which is connected to the coating body (1) and is suitable for detecting the coating liquid in the liquid storage tank (11).

6. The coating device according to claim 5, characterized in that The first liquid level mechanism (5) comprises a first liquid level tube (51), the bottom end of the first liquid level tube (51) is connected to the bottom of the liquid storage tank (11), and the liquid level in the first liquid level tube (51) can be flush with the liquid level of the liquid storage tank (11).

7. The coating device according to claim 6, characterized in that The first liquid level mechanism (5) further comprises a liquid level meter (52), the liquid level meter (52) being connected to the first liquid level tube (51), and the liquid level meter (52) being capable of detecting the liquid level of the first liquid level tube (51).

8. The coating device according to claim 1, characterized in that It also includes a liquid storage tank (6), which is connected to the liquid storage tank (11), and the liquid storage tank (6) can transport the coating liquid to the liquid storage tank (11).

9. The coating device according to claim 8, characterized in that The invention also includes a first liquid level mechanism (5) and a solenoid valve (7). The first liquid level mechanism (5) is suitable for detecting the coating liquid in the liquid storage tank (11). The solenoid valve (7) is electrically connected to the first liquid level mechanism (5). The liquid storage tank (6) is connected to the liquid storage tank (11) through the solenoid valve (7). The first liquid level mechanism (5) can send a signal to the solenoid valve (7) to enable the solenoid valve (7) to be opened or closed.

10. The coating device according to claim 8, characterized in that The liquid storage tank (6) is further provided with a second liquid level mechanism (61), and the second liquid level mechanism (61) is suitable for detecting the coating liquid in the liquid storage tank (6).

11. A battery cell string welding machine, characterized in that: Comprising the coating device according to any one of claims 1 to 10.

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