CN223184818U - Coating device and cell stringing machine - Google Patents

Abstract

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

Description

Coating device and battery piece series welding machine

Technical Field

The utility model relates to the technical field of photovoltaic panel processing equipment, in particular to a coating device and a battery piece series welding machine.

Background

In the related art, the soldering ribbon is generally required to be coated with flux on the soldering surface of the soldering ribbon before soldering, and at present, the soldering ribbon is generally pressed into a groove filled with the flux directly, and the method easily causes the soldering ribbon to be stressed and bent, so that the subsequent soldering effect is affected.

Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of utility model

It is an object of the present utility model to provide a new solution for a coating device.

According to a first aspect of the present utility model, a coating apparatus is provided. The coating device includes:

the coating body is provided with a liquid storage tank which is suitable for containing coating liquid;

the adsorption piece is arranged in the liquid storage tank and 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 piece is suitable for adsorbing the coating liquid;

Wherein the coating end is capable of contacting a workpiece to coat the workpiece with the coating liquid.

Optionally, the device further comprises a discharge pipe, wherein the discharge pipe is communicated with the liquid storage tank.

Optionally, the discharge pipe is communicated with the bottom wall of the liquid storage tank.

Optionally, the device further comprises a first liquid inlet pipe, wherein the first liquid inlet pipe is communicated with the bottom of the liquid storage tank.

Optionally, the coating device further comprises a first liquid level mechanism, wherein the first liquid level mechanism is connected to the coating body and is suitable for detecting the coating liquid in the liquid storage tank.

Optionally, the first liquid level mechanism includes first liquid level pipe, the bottom of first liquid level pipe communicate in the bottom of reservoir, liquid level in the first liquid level pipe can with the liquid level parallel and level of reservoir.

Optionally, the first liquid level mechanism further comprises a liquid level meter, the liquid level meter is connected to the first liquid level pipe, and the liquid level meter can detect the liquid level of the first liquid level pipe.

Optionally, the coating device further comprises a liquid storage tank, wherein the liquid storage tank is connected to the liquid storage tank, and the liquid storage tank can convey the coating liquid to the liquid storage tank.

Optionally, the coating device further comprises a first liquid level mechanism and an electromagnetic valve, wherein the first liquid level mechanism is suitable for detecting the coating liquid in the liquid storage tank, the electromagnetic valve is electrically connected to the first liquid level mechanism, the liquid storage tank is communicated with the liquid storage tank through the electromagnetic valve, and the first liquid level mechanism can send a signal to the electromagnetic valve so that the electromagnetic valve can be opened or closed.

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.

According to a second aspect of the application, a battery piece stringer is provided. The battery piece series welding machine comprises the coating device of the embodiment.

The coating device has the technical effects that the coating body is provided with the liquid storage tank, the adsorption piece is arranged in the liquid storage tank, the coating end of the adsorption piece is flush with the opening end of the liquid storage tank or protrudes out of the opening end, the adsorption piece can adsorb the coating liquid, the workpiece can be contacted with the coating end of the adsorption piece, and therefore the surface of the workpiece can be coated with the coating liquid.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a partial schematic structure of a coating apparatus according to an embodiment of the present application.

Fig. 2 is a schematic partial structure of a coating apparatus according to another embodiment of the present application.

Fig. 3 is a side view of the coating apparatus of fig. 1 of the present application.

Fig. 4 is a rear view of the coating device shown in fig. 3.

Fig. 5 is a left side view of the coating device shown in fig. 3.

Fig. 6 is a schematic diagram of a liquid storage tank according to an embodiment of the present application.

Fig. 7 is a schematic view of a solenoid valve according to an embodiment of the application.

Fig. 8 is a side view of the solenoid valve shown in fig. 7.

Reference numerals:

1. Coating a body, 11, a liquid storage tank, 12, a first liquid inlet pipe, 13, a second communicating pipe, 2, an adsorption piece, 3, a discharge pipe, 4, a first communicating pipe, 5, a first liquid level mechanism, 51, a first liquid level pipe, 52, a liquid level meter, 53, a third communicating pipe, 54, a fourth communicating pipe, 6, a liquid storage tank, 61, a second liquid level mechanism, 62, a transfusion pipe, 63, a second liquid inlet pipe, 64, a pressure meter, 7, an electromagnetic valve, 71, an air source, 72, a pressure gauge, 73, a valve body, 74, a first air inlet, 75, a second air inlet, 76, a second mounting seat, 8, a first mounting seat, 9 and a workpiece.

Detailed Description

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

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

According to one embodiment of the present application, a coating apparatus is provided. As shown in fig. 1 to 8, the coating device comprises a coating body 1, an adsorption piece 2, wherein the coating body 1 is provided with a liquid storage groove 11, the liquid storage groove 11 is suitable for containing coating liquid, the adsorption piece 2 is arranged in the liquid storage groove 11, the adsorption piece 2 is provided with a coating end, the coating end is flush with or protrudes out of the opening end of the liquid storage groove 11, the adsorption piece 2 is suitable for adsorbing the coating liquid, and the coating end can be in contact with a workpiece 9 so as to coat the workpiece 9 with the coating liquid.

In this example, the coating body 1 is provided with a liquid storage tank 11, the adsorbing member 2 is arranged in the liquid storage tank 11, the coating end of the adsorbing member 2 is flush with the opening end of the liquid storage tank 11 or protrudes out of the opening end, the adsorbing member 2 can adsorb the coating liquid, the workpiece 9 can be contacted with the coating end of the adsorbing member 2, and thus the surface of the workpiece 9 can be coated with the coating liquid, and the coating device of the application does not need to apply pressure to the workpiece 9, so that the workpiece 9 can be prevented from being bent under stress. Further, by the contact coating of the suction member 2 with the surface of the workpiece 9, the surface coating of the workpiece 9 can be more uniform. And, the surface of the workpiece 9 contacting the adsorbing member 2 can be coated only, so that the coating accuracy is higher, and the waste of the coating liquid is avoided.

As shown in fig. 2, for example, the coating liquid is soldering flux, the liquid storage tank 11 of the present application is suitable for containing soldering flux, the adsorbing member 2 is at least partially contained in the liquid storage tank 11, and the adsorbing member 2 is capable of adsorbing soldering flux. The work 9 may be a solder strip, and when it is necessary to apply flux to the solder strip, the flux can be applied by bringing one side of the solder strip into contact with the application end of the adsorbing member 2, and by moving the solder strip along the surface of the application end, the flux can be applied to one side of the solder strip. Of course, the workpiece 9 and the coating liquid of the present application may have other structures or types, and those skilled in the art may depend on the actual situation, and are not specifically limited herein.

In this example, the upper end surface of the adsorbing member 2 may be provided as a coating end, which may be flush with the upper end surface of the liquid reservoir 11, or which protrudes from the upper end surface of the liquid reservoir 11, so that the work 9 can be coated with the coating liquid after sliding along the coating end.

In this example, the absorbing member 2 has a good water absorption property, and after the absorbing member 2 absorbs the coating liquid, the coating liquid can wet the coating end of the absorbing member 2, so that the coating end can have a good coating effect. For example, the adsorbing member 2 may be a sponge, which has good water absorbability, and has a simple structure and low cost. In addition, the sponge is soft, and the workpiece 9 can be prevented from being scratched. Of course, the absorbent member 2 may be of other types, such as super elastic polymer absorbent resin, nonwoven fabric, and other synthetic or natural materials. Those skilled in the art will recognize the actual situation, and are not particularly limited herein.

In one example, as shown in fig. 3, the coating apparatus further comprises a discharge pipe 3, said discharge pipe 3 being in communication with said reservoir 11.

As shown in fig. 3, the liquid storage tank 11 is also connected with a discharge pipe 3, and the discharge pipe 3 is suitable for discharging the waste materials in the liquid storage tank 11. For example, when the type of coating liquid in the liquid storage tank 11 needs to be replaced or when the liquid storage tank 11 needs to be cleaned, the valve of the discharging pipe 3 can be opened, and the residual materials in the liquid storage tank 11 can be discharged through the discharging pipe 3, so that the efficiency is high, and time and labor are saved.

In this instance, the discharge pipe 3 may be connected to the bottom wall of the liquid storage tank 11, and when discharging is required, the coating liquid may flow out of the discharge pipe 3 through the gravity action without a pumping device having an additional water pump, thereby reducing the cost.

In this example, the other end of the discharge pipe 3 may be connected to a recovery tank, and the discharged coating liquid may flow out of the recovery tank for secondary use.

In one example, as shown in fig. 4, the coating apparatus further includes a first liquid inlet pipe 12, and the first liquid inlet pipe 12 is connected to the bottom of the liquid storage tank 11.

As shown in fig. 4, in this example, the coating body 1 is further provided with a first liquid inlet pipe 12, and the first liquid inlet pipe 12 communicates with the bottom position of the liquid storage tank 11. The first liquid inlet pipe 12 is used for supplementing the coating liquid into the liquid storage tank 11. The first liquid inlet pipe 12 is communicated with the bottom position of the liquid storage tank 11. When the coating liquid is replenished into the liquid storage tank 11, the coating liquid can fill the liquid storage tank 11 more quickly, and the liquid storage tank 11 is prevented from being overflowed easily due to the shielding of the absorbing member 2 when the liquid is injected from the upper side.

In one example, as shown in fig. 1 to 5, the coating device further comprises a first level mechanism 5, the first level mechanism 5 being connected to the coating body 1, the first level mechanism 5 being adapted to detect the coating liquid in the reservoir 11.

In this example, the coating device further comprises a first level mechanism 5, the first level mechanism 5 being adapted to detect the remaining amount of coating liquid in the reservoir 11. When the residual amount of the coating liquid in the liquid storage tank 11 is insufficient, a signal can be sent out so as to facilitate the timely addition of the coating liquid in the liquid storage tank 11, thereby ensuring the coating effect of the absorption part 2 on the workpiece 9.

In one example, as shown in fig. 1 to 5, the first liquid level mechanism 5 includes a first liquid level pipe 51, the bottom end of the first liquid level pipe 51 is communicated with the bottom of the liquid storage tank 11, and the liquid level in the first liquid level pipe 51 can be level with the liquid level of the liquid storage tank 11.

As shown in fig. 4 and 5, in this example, the first liquid level pipe 51 may be vertically disposed. One side of the coating body 1 is provided with a first communication pipe 4 and a second communication pipe 13, respectively. The first communication pipe 4 is communicated with the upper part of the liquid storage tank 11, and the second communication pipe 13 is communicated with the bottom of the liquid storage tank 11. The first level pipe 51 is provided at both ends thereof with a third communication pipe 53 and a fourth communication pipe 54, respectively. The third communication pipe 53 communicates with the first communication pipe 4, and the fourth communication pipe 54 communicates with the second communication pipe 13. After the coating liquid is added to the reservoir 11, the coating liquid can flow from the second communication pipe 13 into the first liquid level pipe 51 through the fourth communication pipe 54. The liquid level of the first liquid level pipe 51 can be flush with the liquid level of the liquid reservoir 11, so that the coating liquid remaining in the liquid reservoir 11 can be monitored by the first liquid level pipe 51. When the allowance is insufficient, the addition is needed in time. When the addition is to the preset value, the addition is stopped. The third communication pipe 53 communicates with the first communication pipe 4, and can balance the pressure in the first liquid level pipe 51 with the external pressure, so as to more accurately measure the liquid level of the coating liquid in the liquid reservoir 11.

Wherein, can pass through hose connection between first communicating pipe 4 and the third communicating pipe 53, also can pass through hose connection between fourth communicating pipe 54 and the second communicating pipe 13, hose connection is convenient to can be convenient arrange the position of first liquid level mechanism 5 and coating body 1. Of course, the connection between the first communication pipe 4 and the third communication pipe 53, and the connection between the fourth communication pipe 54 and the second communication pipe 13 may be made by other types of pipe bodies, and those skilled in the art may be determined according to actual situations, and are not particularly limited herein.

In one example, as shown in fig. 3 and 5, the first level mechanism 5 further includes a level gauge 52, the level gauge 52 is connected to the first level pipe 51, and the level gauge 52 is capable of detecting the liquid level of the first level pipe 51.

As shown in fig. 3 and 5, a level gauge 52 is connected to the first level pipe 51, and the level gauge 52 is capable of detecting the liquid level of the first level pipe 51, thereby being capable of detecting the remaining amount of the coating liquid in the liquid reservoir 11.

In this example, the level gauge 52 may be electrically connected to a control valve of the reservoir 6, and when the level gauge 52 detects that the coating liquid in the reservoir 11 is insufficient, the level gauge 52 may send an open electrical signal to the control valve, which is open, and the reservoir 6 may deliver the coating liquid to the reservoir 11, and when the coating liquid in the reservoir 11 reaches a preset position, the level gauge 52 sends a close electrical signal to the control valve, which is closed.

In this example, as shown in fig. 1 to 5, the coating apparatus further includes a first mount 8, and the coating body 1 and the first liquid level mechanism 5 are mounted to the first mount 8. The first level means 5 is located at one side of the coating body 1.

In one example, as shown in fig. 6, the coating apparatus further includes a liquid storage tank 6, the liquid storage tank 6 is connected to the liquid storage tank 11, and the liquid storage tank 6 is capable of delivering the coating liquid to the liquid storage tank 11.

As shown in fig. 6, in this example, a reservoir 6 is used to store the coating liquid. The liquid storage tank 6 is provided with a liquid conveying pipe 62, and the liquid conveying pipe 62 can be communicated with the first liquid inlet pipe 12 on the coating body 1, so that the liquid storage tank 6 can supplement coating liquid to the liquid storage tank 11. Wherein, the infusion tube 62 and the first liquid inlet tube 12 can be connected through a hose. Of course, the infusion tube 62 and the first liquid inlet tube 12 may be connected by other types of tube bodies, and those skilled in the art may depend on the actual situation, which is not specifically limited herein.

In this example, a pressure mechanism is provided inside the reservoir 6, which is capable of applying pressure to the interior of the reservoir 6, thereby enabling the coating liquid inside the reservoir 6 to be hydraulically drawn into the reservoir 11. For example, the pressure mechanism may be a structure such as a gas-liquid pressurizing device, a booster pump, etc., and those skilled in the art may depend on the actual situation, and is not specifically limited herein,

As shown in fig. 6, the reservoir 6 is also fitted with a pressure gauge 64. A pressure gauge 64 may be mounted on the upper end surface of the reservoir 6. A pressure gauge 64 may be used to measure the pressure of the fluid reservoir 6. When the pressure is too high, the pressure mechanism is closed so as not to damage the pressure tank or cause too fast delivery of the coating liquid due to the excessive pressure, and the liquid level of the coating liquid in the liquid storage tank 11 rises too fast.

As shown in fig. 6, in this example, a transfer line 62 is located at the upper end of the reservoir 6. The lower end of the liquid storage tank 6 is also provided with a liquid outlet which is suitable for discharging the waste liquid in the liquid storage tank 6.

In this example, the liquid reservoir 6 is also connected to a second liquid inlet pipe 63. The second liquid inlet pipe 63 can feed the coating liquid, other liquid, or the like into the liquid storage tank 6. The second liquid inlet pipe 63 may be integrally formed with the liquid storage tank 6, or may be tightly connected to the liquid storage tank 6 by screwing or clamping. Wherein, the open end of the second liquid inlet pipe 63 can be provided with a funnel for feeding.

In one example, as shown in fig. 6, the liquid storage tank 6 is further provided with a second liquid level mechanism 61, and the second liquid level mechanism 61 is adapted to detect the coating liquid in the liquid storage tank 6.

As shown in fig. 6, in this example, the second liquid level mechanism 61 is provided to the outer wall of the liquid reservoir tank 6. The second liquid level mechanism 61 can detect the remaining amount of the 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.

In this example, the second liquid level mechanism 61 includes a second liquid level pipe, and two ends of the second liquid level pipe are respectively communicated with the inner cavity of the liquid storage tank 6. The second liquid level pipe is vertically arranged, the upper end of the second liquid level pipe is communicated with the upper part of the inner cavity of the liquid storage tank 6, and the part which is not filled with liquid is communicated. The lower extreme of second liquid level pipe communicates in the bottom of oil storage tank inner chamber, and the liquid in the liquid storage tank 6 can flow from the lower extreme of second liquid level pipe to in the second liquid level pipe to make the liquid level in the second liquid level pipe and the liquid level parallel and level in the liquid storage tank 6, thereby can detect the surplus of the liquid in the liquid storage tank 6.

Wherein, the upper end of second liquid level pipe communicates in the upper portion of liquid storage pot 6 inner chamber, and the partial intercommunication of unfilled liquid also can play the effect of the pressure in the balanced second liquid level pipe to the liquid level of the liquid in the liquid storage pot 6 of second liquid level pipe detection that the second liquid level pipe can be more accurate.

In one example, the coating device further comprises 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 communicated with the liquid storage tank 11 through the solenoid valve 7, and 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.

In this example, the first level mechanism 5 comprises a level gauge 52 and a first level pipe 51, the first level pipe 51 being by communicating with the reservoir 11, by means of a communicating vessel principle, flush with the liquid level of the reservoir 11. The level gauge 52 is capable of detecting the level of said first level pipe 51. The level gauge 52 is electrically connected to the solenoid valve 7. The liquid storage tank 6 is communicated with the liquid storage tank 11 through the electromagnetic valve 7. The liquid level meter 52 can send a signal to the electromagnetic valve 7, for example, when the coating liquid in the liquid storage tank 11 is insufficient, the liquid level meter 52 can send a valve opening signal to the electromagnetic valve 7, the electromagnetic valve 7 can be opened, the liquid storage tank 6 can convey 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 meter 52 can send a valve closing signal to the electromagnetic valve 7, the electromagnetic valve 7 is closed, and the liquid storage tank 6 stops conveying the coating liquid into the liquid storage tank 11. By electrically connecting and matching the first liquid level mechanism 5 and the electromagnetic valve 7, the automation degree of the coating device can be improved.

As shown in fig. 7 and 8, in this example, the solenoid valve 7 includes a valve body 73, one end opening of the valve body 73 is in communication with the liquid supply pipe 62 of the liquid reservoir 6 through a hose, and the other end opening is in communication with the first liquid supply pipe 12 of the liquid reservoir 11 through a hose. The valve body 73 can be closed to block communication of the reservoir 6 with the reservoir 11. The valve body 73 can also be opened to put the reservoir 6 in communication with the reservoir 11 to deliver the coating liquid to the reservoir 11.

In this example, the solenoid valve 7 further includes an air supply 71, the valve body 73 is provided with a second air inlet 75, and the air supply 71 is capable of communicating with the second air inlet 75 to supply air to the valve body 73 to control the valve body 73 to be opened or closed. The air source 71 is provided with a first air inlet 74, through which first air inlet 74 the air source 71 can be inflated. The air source 71 is also connected with a pressure gauge 72, and the pressure gauge 72 can detect the pressure in the air source 71.

As shown in fig. 7 and 8, in this example, the solenoid valve 7 further includes a second mount 76. The valve body 73 is mounted to a second mounting seat 76, and the air source 71 may be mounted to a side of the second mounting seat 76 facing away from the valve body 73. The second mounting seat 76 may be configured as a mounting plate. Those skilled in the art will recognize the actual situation, and are not particularly limited herein.

According to another aspect of the application, a battery piece stringer is provided. The battery piece series welding machine comprises the coating device.

In this example, the coating apparatus of the present application can apply flux to the solder strip without applying pressure to the work 9, so that the work 9 can be prevented from being bent by force. Further, by the contact coating of the suction member 2 with the surface of the workpiece 9, the surface coating of the workpiece 9 can be more uniform. And, the surface of the workpiece 9 contacting the adsorbing member 2 can be coated only, so that the coating accuracy is higher, and the waste of the coating liquid is avoided.

In this example, the battery piece string welding machine further comprises a feeding device, and is suitable for taking materials from the storage bin. The device is glued in seal, is applicable to the surface silk screen printing point to the silicon chip and glues, seal the device with still be provided with first transfer mechanism between the loading attachment, first transfer mechanism is applicable to with loading attachment's silicon chip is transported to seal the device. The welding strip processing device is positioned on one side of the glue printing device, and can cover the welding strip on the surface of the glued silicon chip, and the welding strip corresponds to the glue dispensing position so that the welding strip can be adhered to the silicon chip. And the welding device is positioned at one side of the welding strip processing device and is suitable for welding the welding strip to the silicon wafer so as to prepare the battery piece. The detection device is suitable for detecting the welded battery piece.

Before the welding strip treatment device covers the welding strip on the surface of the silicon wafer, the coating device can be used for coating the surface of the welding strip with the soldering flux so as to facilitate the welding of the welding strip on the silicon wafer.

The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (11)

1. A coating device, comprising: 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 is 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 is characterized in that it further comprises a first liquid inlet pipe (12), wherein the first liquid inlet pipe (12) is connected to the bottom of the liquid storage tank (11). 5. The coating device according to claim 1 is characterized in that it also includes a first liquid level mechanism (5), the first liquid level mechanism (5) is connected to the coating body (1), and the first liquid level mechanism (5) is suitable for detecting the coating liquid in the liquid storage tank (11). 6. The coating device according to claim 5 is characterized in that 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). 7. The coating device according to claim 6 is characterized in that the first liquid level mechanism (5) further includes a liquid level gauge (52), the liquid level gauge (52) is connected to the first liquid level tube (51), and the liquid level gauge (52) can detect the liquid level of the first liquid level tube (51). 8. The coating device according to claim 1 is characterized in that it further comprises a liquid storage tank (6), wherein the liquid storage tank (6) 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 is characterized in that it 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), and 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 by comprising the coating device according to any one of claims 1 to 10.