Automatic cleaning device of lithium battery liquid injection machine

Abstract

The utility model discloses an automatic cleaning device of a lithium battery liquid injection machine, which comprises a liquid injection mechanism and a cleaning mechanism used for cleaning the liquid injection mechanism, the liquid injection mechanism comprises a pneumatic control assembly, a liquid discharging assembly and a battery assembly, the output end of the liquid discharging assembly is connected with the battery upper port of the battery assembly, and the cleaning mechanism is used for cleaning the liquid injection mechanism. The pneumatic control assembly is connected with the liquid discharging assembly and the battery assembly through the pipeline assembly, the cleaning mechanism comprises a DMC assembly and a pneumatic control assembly used for controlling circulation of a cavity where the battery assembly is located, and the DMC assembly is connected with the pneumatic control assembly. The automatic cleaning device integrates vacuumizing, nitrogen filling, waste gas discharging and cleaning, can achieve the purposes of rapid cleaning, reduction of shutdown cleaning maintenance time and improvement of efficiency, and guarantees a good cleaning effect.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery preparation, in particular to an automatic cleaning device for a lithium battery liquid injection machine. Background Art

[0002] The filling machine is affected by the temperature and humidity of the workshop. The electrolyte will crystallize due to moisture. Electrolyte crystallization will inevitably occur inside the filling machine. If electrolyte crystallization occurs, the crystals will adhere to the inside of the filling machine. As time goes by, the filling machine cavity air pipe, lower cup air pipe, lower cup pressure head, air exhaust, and lower cup nozzle will be blocked, forming a large and long-term pressure difference inside and outside the battery shell, causing the battery to swell or sag, and thus become scrapped.

[0003] At present, most of the domestic filling stations adopt manual disassembly and disassembly, and then clean the connecting air pipes and the lower cup barrel one by one. This method is time-consuming, inefficient, and has high labor costs. In addition, frequent disassembly can easily cause poor sealing of the filling machine structure and cause other faults. Utility Model Content

[0004] Based on the technical problems existing in the background technology, the utility model proposes an automatic cleaning device for a lithium battery liquid filling machine to realize automatic cleaning of the liquid filling machine.

[0005] The utility model proposes an automatic cleaning device for a lithium battery liquid filling machine, comprising a cleaning mechanism for cleaning the liquid filling mechanism, wherein the liquid filling mechanism comprises an air control component, a lower liquid component and a battery component, wherein the output end of the lower liquid component is connected to the battery upper port of the battery component, the air control component is connected to the lower liquid component and the battery component through a pipeline component, the cleaning mechanism comprises a DMC component and a pneumatic control component for controlling the flow of a cavity in which the battery component is located, and the DMC component is connected to the air control component.

[0006] Furthermore, the lower liquid assembly includes an upper cup assembly, a lower cup assembly and a liquid flow pipe, the output end of the upper cup assembly is connected to the input end of the lower cup assembly through the liquid flow pipe, and the output end of the lower cup assembly is connected to the battery assembly.

[0007] Furthermore, the upper cup assembly includes an upper cup pressure rod cylinder, an upper cup pressure rod, an upper cup barrel and an upper cup pressure head, one end of the upper cup pressure rod is connected to the output end of the upper cup pressure rod cylinder, and the other end is inserted into the upper cup barrel and fixedly connected to the upper cup pressure head, the upper cup barrel is loaded with electrolyte, an upper cup hole is opened at the bottom of the upper cup barrel, the upper cup pressure head completely covers the upper cup hole, one end of the liquid flow tube is connected to the upper cup hole, and the other end is connected to the input end of the lower cup assembly.

[0008] Furthermore, the lower cup assembly includes a lower cup pressure rod cylinder, a lower cup pressure rod, a lower cup barrel, a lower cup pressure head and a lower cup nozzle, one end of the lower cup pressure rod is connected to the output end of the lower cup pressure rod cylinder, and the other end is inserted into the lower cup barrel and fixedly connected to the lower cup pressure rod, a lower cup hole is opened at the bottom of the lower cup pressure head, the upper part of the lower cup hole is completely covered by the lower cup pressure head, and the lower part is connected to the lower cup nozzle, and the lower cup nozzle is in contact with the top of the lithium battery in the battery assembly.

[0009] Furthermore, the battery assembly includes a liquid injection sealed cavity, a lithium battery and a sealed tray. The liquid injection sealed cavity is a space cavity formed by the lower part of the lower cup barrel and the upper part of the lithium battery, and the lithium battery part is arranged on the sealed tray.

[0010] Furthermore, the air control component includes a vacuum pneumatic ball valve, a nitrogen pneumatic ball valve, an atmospheric pneumatic ball valve and a bus; the pipeline component includes a cavity air pipe and a lower cup air pipe; one end of the vacuum pneumatic ball valve, the nitrogen pneumatic ball valve, the atmospheric pneumatic ball valve and the cleaning pneumatic ball valve are all connected to the bus; one end of the cavity air pipe is connected to the bus and the other end is connected to the liquid injection sealing cavity; one end of the lower cup air pipe is connected to the bus and the other end is connected to the lower cup barrel.

[0011] Furthermore, the bus is provided with a bus block connected to the bus cavity.

[0012] Furthermore, the DMC assembly includes a cleaning pipe, an anti-corrosion pump, an anti-corrosion pump pneumatic ball valve and a DMC box. One end of the anti-corrosion pump is connected to the DMC box through the anti-corrosion pump pneumatic ball valve, and the other end of the anti-corrosion pump is connected to the bus through the cleaning pipe, and the DMC box is connected to the sealing tray.

[0013] Furthermore, a cleaning pneumatic ball valve for controlling the on / off of the cleaning pipe is provided on the cleaning pipe.

[0014] Furthermore, the pneumatic control component includes a pallet pneumatic ball valve and an exhaust pneumatic ball valve, one end of the exhaust pneumatic ball valve is connected to the sealed pallet and the other end is connected to the external environment, and one end of the pallet pneumatic ball valve is connected to the sealed pallet and the other end is connected to the DMC box.

[0015] The advantages of the automatic cleaning device of a lithium battery liquid filling machine provided by the utility model are as follows: the automatic cleaning device of a lithium battery liquid filling machine provided in the structure of the utility model injects liquid into the lithium battery in battery drilling through a liquid lowering component, and during the liquid filling process of the liquid lowering component, the liquid lowering state of the liquid lowering component is controlled by the air control component to realize the liquid filling operation of the lithium battery; when cleaning the liquid filling machine, the DMC component controls the injection of DMC solvent into the liquid lowering component through the pneumatic control component to realize automatic cleaning of the liquid filling machine; the cleaning device integrates vacuuming, nitrogen filling, exhaust gas exhaust and cleaning in one, which can achieve the purpose of rapid cleaning, reduce downtime for cleaning and maintenance, and improve efficiency, and ensure good cleaning effect, will not cause poor cavity sealing, solve the problems of low maintenance and cleaning efficiency, high labor cost and concurrent battery deformation and scrapping, and will not cause other faults that lead to battery deformation and scrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Among them, 1-liquid injection mechanism, 2-cleaning mechanism, 11-air control assembly, 12-liquid lower assembly, 13-battery assembly, 14-upper cup assembly, 15-lower cup assembly, 16-liquid flow pipe, 17-pipeline assembly, 21-DMC assembly, 22-pneumatic control assembly, 23-cleaning pipe, 24-anti-corrosion pump, 25-anti-corrosion pump pneumatic ball valve, 26-DMC box, 27-cleaning pneumatic ball valve, 28-tray pneumatic ball valve, 29-exhaust pneumatic ball valve, 30-DMC solvent, 111-vacuum air Pneumatic ball valve, 112-nitrogen pneumatic ball valve, 113-atmospheric pneumatic ball valve, 114-bus, 131-liquid injection sealing cavity, 132-lithium battery, 133-sealing tray, 141-upper cup pressure rod cylinder, 142-upper cup pressure rod, 143-upper cup barrel, 144-upper cup pressure head, 145-electrolyte, 151-lower cup pressure rod cylinder, 152-lower cup pressure rod, 153-lower cup barrel, 154-lower cup pressure head, 155-lower cup nozzle, 171-cavity air pipe, 172-lower cup air pipe. DETAILED DESCRIPTION

[0018] Below, the technical solution of the utility model is described in detail through specific embodiments. Many specific details are described in the following description to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementation disclosed below.

[0019] like Figure 1As shown, the utility model proposes an automatic cleaning device for a lithium battery liquid filling machine, including a cleaning mechanism 2 for cleaning a liquid filling mechanism 1, the liquid filling mechanism 1 includes an air control component 11, a lower liquid component 12 and a battery component 13, the output end of the lower liquid component 12 is connected to the battery upper port of the battery component 13, the air control component 11 is connected to the lower liquid component 12 and the battery component 13 through a pipeline component 17, the cleaning mechanism 2 includes a DMC component 21 and a pneumatic control component 22 for controlling the flow of the cavity where the battery component 13 is located, and the DMC component 21 is connected to the air control component 11.

[0020] The lithium battery 132 in the battery drill 13 is injected with liquid through the liquid lowering component 12. During the liquid injection process of the liquid lowering component 12, the liquid lowering state of the liquid lowering component 12 is controlled by the air control component 11 to realize the liquid injection operation of the lithium battery; when the liquid injector is cleaned, the DMC component 21 controls the injection of DMC solvent 30 into the liquid lowering component 12 through the pneumatic control component 22 to realize automatic cleaning of the liquid injector; the cleaning device integrates vacuuming, nitrogen filling, exhaust gas exhaust and cleaning, which can achieve the purpose of rapid cleaning, reduce downtime for cleaning and maintenance, and improve efficiency, and ensure good cleaning effect, will not cause poor cavity sealing, solve the problems of low maintenance and cleaning efficiency, high labor cost and concurrent battery deformation and scrapping, and will not cause other faults that lead to battery deformation and scrapping.

[0021] In addition, the gas control component 11 and the pneumatic control component 22 in this embodiment can be automatically controlled. Only the DMC solvent 30 needs to be added or removed, and the other steps are automatically implemented, which simplifies the cleaning process, facilitates operation, and improves efficiency.

[0022] (A) In this embodiment, the lower liquid component 12 is specifically: the lower liquid component 12 includes an upper cup component 14, a lower cup component 15 and a liquid flow tube 16, the output end of the upper cup component 14 is connected to the input end of the lower cup component 15 through the liquid flow tube 16, and the output end of the lower cup component 15 is connected to the battery component 13.

[0023] The upper cup assembly 14 and the lower cup assembly 15 are connected via a liquid flow tube 16, so that the upper cup assembly 14 can quantitatively inject electrolyte 145 into the lower cup assembly 15, and then the electrolyte 145 is injected into the lithium battery 132 through the lower cup assembly 15, thereby achieving effective liquid injection of the lithium battery.

[0024] In this embodiment, the upper cup assembly 14 includes an upper cup pressure rod cylinder 141, an upper cup pressure rod 142, an upper cup barrel 143 and an upper cup pressure head 144. One end of the upper cup pressure rod 142 is connected to the output end of the upper cup pressure rod cylinder 141, and the other end is inserted into the upper cup barrel 143 and fixedly connected to the upper cup pressure head 144. The upper cup barrel 143 is loaded with electrolyte 145. An upper cup hole is opened at the bottom of the upper cup barrel 143, and the upper cup pressure head 144 completely covers the upper cup hole. One end of the liquid flow tube 16 is connected to the upper cup hole, and the other end is connected to the input end of the lower cup assembly 15.

[0025] The lower cup assembly 15 includes a lower cup pressure rod cylinder 151, a lower cup pressure rod 152, a lower cup barrel 153, a lower cup pressing head 154 and a lower cup nozzle 155. One end of the lower cup pressure rod 152 is connected to the output end of the lower cup pressure rod cylinder 151, and the other end is inserted into the lower cup barrel 153 and fixedly connected to the lower cup pressure rod 152. A lower cup hole is opened at the bottom of the lower cup pressing head 154, the upper part of the lower cup hole is completely covered by the lower cup pressing head 154, and the lower part is connected to the lower cup nozzle 155. The lower cup nozzle 155 is in contact with the top of the lithium battery 132 in the battery assembly 13.

[0026] The battery assembly 13 includes a liquid injection sealed cavity 131 , a lithium battery 132 and a sealed tray 133 . The liquid injection sealed cavity 131 is a space cavity formed by the lower portion of the lower cup barrel 153 and the upper portion of the lithium battery 132 . The lithium battery 132 is partially disposed on the sealed tray 133 .

[0027] The air control component 11 includes a vacuum pneumatic ball valve 111, a nitrogen pneumatic ball valve 112, an atmospheric pneumatic ball valve 113 and a bus 114. The pipeline component 17 includes a cavity air pipe 171 and a lower cup air pipe 172. One ends of the vacuum pneumatic ball valve 111, the nitrogen pneumatic ball valve 112, the atmospheric pneumatic ball valve 113 and the cleaning pneumatic ball valve 27 are all connected to the bus 114. One end of the cavity air pipe 171 is connected to the bus 114, and the other end is connected to the liquid injection sealing cavity 131. One end of the lower cup air pipe 172 is connected to the bus 114, and the other end is connected to the lower cup barrel 153.

[0028] The electrolyte 145 is automatically pumped into the upper cup barrel 143 by the pump device. The lithium battery 132 is in contact with the lower cup nozzle 155 in the space formed by the liquid injection sealing cavity 131 and the sealing tray 133. The cavity air pipe 171 is connected to the bus 114 and the liquid injection sealing cavity 131. The lower cup air pipe 172 is connected to the bus 114 and the lower cup barrel 153. The lower cup barrel 153 is a sealed container. The liquid injection machine adopts the pressure difference liquid injection method. The lower liquid component 12 controls the liquid injection process to the lithium battery 132 through the air control component 11 as follows:

[0029] ① The lower cup pressure rod cylinder 141 is lifted, driving the lower cup pressure rod 152 and the lower cup pressure head 154 to lift, the lower cup pressure head 154 is separated from the bottom of the lower cup barrel 153, and the vacuum pneumatic ball valve 111 is opened. At this time, the gas in the lithium battery 132 is extracted through the lower cup nozzle 155 → lower cup barrel 153 → lower cup air pipe 172 → bus 114, and the gas in the space composed of the liquid injection sealing cavity 131 and the sealing tray 133 is extracted through the cavity air pipe 171 → bus 114. After standing for a period of process time, the vacuum pneumatic ball valve 111 is closed and the lower cup pressure rod cylinder 151 is lowered at the same time, driving the lower cup pressure rod 152 and the lower cup pressure head 154. The lower cup pressure head 154 is pressed against the bottom of the lower cup barrel 153. The purpose of this step is to extract the gas inside the lithium battery 132 and maintain a negative pressure state to facilitate subsequent liquid injection.

[0030] ② At this time, there is a slight negative pressure inside the lithium battery 132, the bus 114, the lower cup air pipe 172, the cavity air pipe 171, the lower cup barrel 153, the liquid injection sealing cavity 131, and the sealing tray 133. Open the atmospheric pneumatic ball valve 113, and close the atmospheric pneumatic ball valve 113 after a period of process time. The purpose of this step is to neutralize the internal pressure of the bus 114, the lower cup air pipe 172, the cavity air pipe 171, the lower cup barrel 153, the liquid injection sealing cavity 131, and the sealing tray 133 to make it normal pressure, and keep the inside of the lithium battery 132 at a negative pressure.

[0031] ③ The upper cup pressure rod cylinder 141 is lifted, driving the upper cup pressure rod 142 and the upper cup pressure head 144 to be lifted. The upper cup pressure head 144 is separated from the bottom of the upper cup barrel 143, and the electrolyte 145 flows into the lower cup barrel 153 through the liquid flow pipe 16. After standing for a period of process time, the upper cup pressure rod cylinder 141 is lowered. The purpose of this step is to allow the electrolyte 145 to fully flow into the lower cup barrel 153.

[0032] ④ Lift the lower cup pressure rod cylinder 141. At this time, the electrolyte 145 is sucked back into the lithium battery 132 due to the negative pressure; after standing for a period of process time, open the nitrogen pneumatic ball valve 112, and the high-pressure nitrogen passes through the bus 114 → cavity air pipe 171 and the lower cup air pipe 172, and enters the space composed of the liquid injection sealing cavity 131 and the sealing tray 133, and the lower cup barrel 153 respectively. The purpose of this step is to form a pressure difference between the inside and outside of the lithium battery 132, and use high-pressure nitrogen to assist in liquid injection. The pressure in the lower cup barrel 153, the liquid injection sealing cavity 131, the sealing tray 133, and the lithium battery 132 gradually becomes consistent, so that the electrolyte can fully penetrate into the lithium battery 132.

[0033] ⑤Finally, the nitrogen pneumatic ball valve 112 is closed, and the atmospheric pneumatic ball valve 113 is opened for a period of process time and then closed, thereby completing one liquid injection process cycle.

[0034] In this process, the filling machine inputs a fixed amount of electrolyte 145 into the lithium battery. The electrolyte 145 contains main solvents such as ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate. Under ideal conditions, it remains in a liquid state. However, affected by the temperature and humidity in the workshop, the electrolyte will be damp and crystallized. Electrolyte crystallization will inevitably occur inside the filling machine. If electrolyte crystallization occurs, the crystals will adhere to the inside of the filling machine. As time goes by, the cavity air pipe of the filling machine, the lower cup air pipe, the lower cup pressure head, the air exhaust, and the lower cup nozzle will be blocked, and a large and long-term pressure difference will be formed inside and outside the battery shell, causing the battery to swell or Therefore, the present embodiment integrates a cleaning mechanism (2) on the liquid filling machine for cleaning the liquid filling machine, thereby avoiding the following problems in the traditional cleaning process: the cavity air pipe 171, the lower cup air pipe 172, and the bus 114 need to be manually disassembled, and then the lower cup air pipe 172, the lower cup nozzle 155, the cavity air pipe 171, and the lower cup barrel 153 need to be cleaned with a DMC, and the bus 114 needs to be brushed with a brush; external nitrogen is used for drying; and manual reinstallation is performed. The present embodiment integrates vacuuming, nitrogen filling, exhaust gas exhaust, and cleaning, thereby solving the problems of low maintenance and cleaning efficiency, high labor costs, and concurrent battery deformation and scrapping.

[0035] (B) Before cleaning the liquid injection machine through the cleaning mechanism 2, it is necessary to restore the liquid injection machine to its initial state, lower the upper cup pressure rod cylinder 141, and theoretically, there is no electrolyte residue in the liquid flow pipe 16 and the lower cup barrel 153 at this time, and then automatically or manually remove the lithium battery 132, close the high vacuum pneumatic ball valve 18, nitrogen pneumatic ball valve 112, atmospheric pneumatic ball valve 113, and exhaust pneumatic ball valve, lift the lower cup pressure rod cylinder 141, and add a certain amount of DMC solvent 30 into the DMC box 26. At this time, the preparation work is completed.

[0036] The principle flow of this automatic cleaning technology is as follows: ① Open the cleaning pneumatic ball valve 27, the anti-corrosion pump pneumatic ball valve 25, and the tray pneumatic ball valve 28. At this time, the DMC box 26, the bus bar 114, the lower cup barrel 153, and the sealing tray 133 form a loop space;

[0037] ② Start the anti-corrosion pump 24, and the DMC solvent will be cleaned in the order of DMC box 26 → anti-corrosion pump 24 → cleaning pipe 23 → bus 114 → cavity air pipe 171, lower cup air pipe 172 → lower cup barrel 153 → lower cup nozzle 155 → sealing tray 133 → DMC box 26. Because the bus is installed horizontally, the DMC solvent can flow evenly to each lower cup barrel;

[0038] ③ After a period of cleaning process time, turn off the anti-corrosion pump 24, clean the pneumatic ball valve 27, the anti-corrosion pump pneumatic ball valve 25, and the pallet pneumatic ball valve 28;

[0039] ④ After a period of process standing, open the exhaust pneumatic ball valve 29, open the nitrogen pneumatic ball valve 112, and then the high-pressure nitrogen will be blown out along the bus 114 → cavity air pipe 171, lower cup air pipe 172 → lower cup barrel 153 → lower cup nozzle 155 → sealing tray 133 → exhaust pneumatic ball valve 29. The purpose of this step is to blow out the residual DMC / electrolyte mixed solvent to ensure that the pipeline and cavity are unblocked and dry;

[0040] ⑤Finally, close the nitrogen pneumatic ball valve 112 and the exhaust pneumatic ball valve 29 to complete one cleaning process cycle.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic cleaning device for a lithium battery filling machine, characterized in that: The invention comprises a cleaning mechanism (2) for cleaning a liquid injection mechanism (1), wherein the liquid injection mechanism (1) comprises an air control component (11), a liquid lowering component (12) and a battery component (13), wherein the output end of the liquid lowering component (12) is connected to the battery upper port of the battery component (13), the air control component (11) is connected to the liquid lowering component (12) and the battery component (13) via a pipeline component (17), the cleaning mechanism (2) comprises a DMC component (21) and a pneumatic control component (22) for controlling the flow of a cavity in which the battery component (13) is located, and the DMC component (21) is connected to the air control component (11); The lower liquid assembly (12) comprises an upper cup assembly (14), a lower cup assembly (15) and a liquid flow pipe (16), the output end of the upper cup assembly (14) is connected to the input end of the lower cup assembly (15) through the liquid flow pipe (16), and the output end of the lower cup assembly (15) is connected to the battery assembly (13); The air control component (11) comprises a vacuum pneumatic ball valve (111), a nitrogen pneumatic ball valve (112), an atmospheric pneumatic ball valve (113) and a bus (114); the pipeline component (17) comprises a cavity air pipe (171) and a lower cup air pipe (172); one end of the vacuum pneumatic ball valve (111), the nitrogen pneumatic ball valve (112), the atmospheric pneumatic ball valve (113) and the cleaning pneumatic ball valve (27) are all connected to the bus (114); one end of the cavity air pipe (171) is connected to the bus (114) and the other end is connected to the liquid injection sealing cavity (131) in the battery component (13); one end of the lower cup air pipe (172) is connected to the bus (114) and the other end is connected to the lower cup barrel (153) in the lower cup component (15); The DMC assembly (21) comprises a cleaning pipe (23), an anti-corrosion pump (24), an anti-corrosion pump pneumatic ball valve (25) and a DMC box (26); one end of the anti-corrosion pump (24) is connected to the DMC box (26) via the anti-corrosion pump pneumatic ball valve (25); the other end of the anti-corrosion pump (24) is connected to the bus bar (114) via the cleaning pipe (23); and the DMC box (26) is connected to a sealing tray (133) in the battery assembly (13); The cleaning pipe (23) is provided with a cleaning pneumatic ball valve (27) for controlling the on / off of the cleaning pipe (23); The pneumatic control assembly (22) comprises a tray pneumatic ball valve (28) and an exhaust pneumatic ball valve (29), wherein one end of the exhaust pneumatic ball valve (29) is connected to the sealing tray (133) and the other end is communicated with the external environment, and one end of the tray pneumatic ball valve (28) is connected to the sealing tray (133) and the other end is connected to the DMC box (26).

2. The automatic cleaning device for a lithium battery filling machine according to claim 1, characterized in that: The upper cup assembly (14) comprises an upper cup pressure rod cylinder (141), an upper cup pressure rod (142), an upper cup barrel (143) and an upper cup pressure head (144); one end of the upper cup pressure rod (142) is connected to the output end of the upper cup pressure rod cylinder (141), and the other end is inserted into the upper cup barrel (143) and fixedly connected to the upper cup pressure head (144); the upper cup barrel (143) is loaded with electrolyte (145); an upper cup hole is provided at the bottom of the upper cup barrel (143); the upper cup pressure head (144) completely covers the upper cup hole; one end of the liquid flow pipe (16) is connected to the upper cup hole, and the other end is connected to the input end of the lower cup assembly (15).

3. The automatic cleaning device for a lithium battery filling machine according to claim 2, characterized in that: The lower cup assembly (15) comprises a lower cup pressing rod cylinder (151), a lower cup pressing rod (152), a lower cup barrel (153), a lower cup pressing head (154) and a lower cup glue nozzle (155); one end of the lower cup pressing rod (152) is connected to the output end of the lower cup pressing rod cylinder (151), and the other end is inserted into the lower cup barrel (153) and fixedly connected to the lower cup pressing rod (152); a lower cup hole is provided at the bottom of the lower cup pressing head (154); the upper part of the lower cup hole is completely covered by the lower cup pressing head (154), and the lower part is connected to the lower cup glue nozzle (155); the lower cup glue nozzle (155) contacts the top of the lithium battery (132) in the battery assembly (13).

4. The automatic cleaning device for a lithium battery liquid filling machine according to claim 3, characterized in that: The battery assembly (13) comprises a liquid injection sealed cavity (131), a lithium battery (132) and a sealed tray (133); the liquid injection sealed cavity (131) is a space cavity formed by the lower part of the lower cup barrel (153) and the upper part of the lithium battery (132); the lithium battery (132) is partially arranged on the sealed tray (133).

5. The automatic cleaning device for a lithium battery liquid filling machine according to claim 1, characterized in that: The bus bar (114) is provided with a bus bar (114) plug which is in communication with the bus bar (114) cavity.

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