A filling machine for lithium battery raw material production

Abstract

The present invention discloses a filling machine for the production of lithium battery raw materials, relating to the technical field of lithium battery raw material filling, comprising a frame, on which a stirring assembly, a filtering assembly, a buffer adjustment assembly, and a filling assembly are arranged in sequence from top to bottom, a transmission assembly is arranged below the filling assembly, the buffer adjustment assembly comprises a shell 2, a connecting pipe 2, and a shell 3 which are arranged in sequence from top to bottom, a buffer cavity is provided in the shell 2, a vacuum cavity is provided in the shell 3, a vacuum pump is provided on one side of the shell 3, the vacuum pump is connected to the vacuum cavity through a pipeline, the buffer cavity is connected to the vacuum cavity through the connecting pipe 2, the volume of the buffer cavity is 5 times the volume of the connecting pipe 2, a viscosity sensor 2 is provided on the side where the buffer cavity is connected to the connecting pipe 2, and an electric control valve is fixedly connected to the connection between the connecting pipe 2 and the buffer cavity. The present invention has the characteristics of improving the filling efficiency and filling accuracy of lithium battery raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery raw material filling, in particular to a filling machine for lithium battery raw material production. Background Art

[0002] Lithium battery raw material filling machines are a core piece of equipment in lithium battery production, primarily used to precisely fill raw materials such as positive and negative electrode slurries and electrolytes into battery casings or coating equipment. However, changes in raw material viscosity during the filling process often lead to a series of process issues, directly impacting battery performance, production efficiency, and equipment stability.

[0003] Lithium battery slurry typically consists of active materials (such as lithium cobalt oxide and graphite), a conductive agent (carbon black), a binder (PVDF and SBR), and a solvent (NMP and water). Its rheological properties exhibit non-Newtonian fluid behavior, with viscosity significantly affected by factors such as shear rate, solids content, and temperature.

[0004] Filling must meet high precision (error <±1%), uniformity, and continuity requirements. For example, when slurry is filled into lithium batteries via a filling machine, viscosity fluctuations can lead to poor filling accuracy, which in turn affects battery capacity and cycle life. Furthermore, electrolyte filling must be free of bubbles and impurities; excessive viscosity or poor fluidity can easily cause filling interruptions or equipment blockages.

[0005] Therefore, it is necessary to design a filling machine for the production of lithium battery raw materials that can improve the filling efficiency and filling accuracy of lithium battery raw materials. Summary of the Invention

[0006] The object of the present invention is to provide a filling machine for the production of lithium battery raw materials to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: A filling machine for producing lithium battery raw materials, comprising a frame, on which a stirring assembly, a filtering assembly, a buffer adjustment assembly, and a filling assembly are arranged in order from top to bottom, and a transmission assembly is arranged below the filling assembly;

[0008] The buffer adjustment assembly includes a second shell, a second connecting pipe, and a third shell, which are arranged in sequence from top to bottom. A buffer chamber is defined in the second shell, a vacuum chamber is defined in the third shell, and a vacuum pump is provided on one side of the third shell. The vacuum pump is connected to the vacuum chamber through a pipeline, and the buffer chamber is connected to the vacuum chamber through the second connecting pipe. The volume of the buffer chamber is 5 times that of the second connecting pipe.

[0009] A second viscosity sensor is provided on one side of the buffer chamber connected to the second connecting pipe, an electric control valve is fixedly connected to the connection between the second connecting pipe and the buffer chamber, a first pulse recoil air pump is provided at the connection between the second connecting pipe and the vacuum chamber, and the electric control valve, the second viscosity sensor and the first pulse recoil air pump are all signal-connected to a processor;

[0010] An annular elastic airbag that undergoes elastic deformation in the radial direction is provided at the port of the buffer chamber close to the side of the connecting pipe 2. The connecting pipe 2 includes an inner tube and an outer tube. The inner tube is sleeved in the outer tube. A sealed constant temperature chamber is formed between the inner tube and the outer tube. A spiral guide plate is provided in the constant temperature chamber along its axial direction. The constant temperature chamber is filled with a heat-conducting fluid that can circulate.

[0011] According to the above technical solution, the annular elastic airbag is provided with an air cavity, the corresponding liquid cavity of the second shell is penetrated by an air pipe, the input end of the air pipe is provided with a pressure pump, the pressure pump is fixedly connected to the frame, the output end of the pressure pump is fixedly connected to the air pipe, and the second shell is further penetrated by an air pressure sensor, and the air pressure sensor and the pressure pump are both connected to the processor signal.

[0012] According to the above technical solution, a circulating pump is fixedly connected to the frame, the output end of the circulating pump is connected to one end of the constant temperature chamber close to the buffer chamber, the input end of the circulating pump is connected to one end of the constant temperature chamber close to the vacuum chamber, and a heater and a refrigerator are fixedly connected to the output end pipe of the circulating pump.

[0013] According to the above technical solution, the stirring assembly includes a stirring cylinder, which is fixedly connected to the frame, and the top of the stirring cylinder is fixedly connected to a feed pipe and a liquid inlet pipe connected to the stirring cylinder. A rotatable agitator is provided in the stirring cylinder, and a viscosity sensor 1 is passed through the stirring cylinder. A flow control valve is fixedly connected to the port at the lower end of the stirring cylinder, and the flow control valve and the viscosity sensor 1 are both connected to the processor signal.

[0014] According to the above technical solution, the filter assembly includes a housing 1, a filter chamber is defined in the housing 1, an end cap is detachably connected to the upper end of the housing 1, a connecting pipe 1 is fixedly connected to the end cap, one end of the connecting pipe 1 is connected to the output end of the flow control valve, and the other end of the connecting pipe 1 passes through the end cap and is connected to the filter chamber;

[0015] A filter screen cartridge is rotatably connected in the filter cavity, and a first discharge port and a second discharge port are provided at the lower end of the filter cavity. The lower end of the filter screen cartridge is sleeved in the first discharge port and is sealed and rotatably connected to the inner wall of the first discharge port. The upper end of the filter screen cartridge is sealed and rotatably connected to the end cover.

[0016] The second discharge port is located outside the filter cylinder, the inner wall of the lower side of the filter cavity is inclined toward the second discharge port, and the second discharge port pipeline is connected to the buffer adjustment component;

[0017] The discharge port is connected to a waste box through a pipe, and the waste box is fixedly connected to the frame.

[0018] According to the above technical solution, the filling components include a metering pump, a filling head, a second pulse recoil air pump, and a filling needle. The output end of the vacuum chamber is connected to the input end of the metering pump. A dosimeter is provided on the pipe connecting the vacuum chamber to the metering pump. The dosimeter is vertically fixed to the frame.

[0019] The output end pipeline of the metering pump is connected to the filling head, the output end of the filling head is fixedly connected to the filling needle, and the input end port of the filling head is embedded with a pressure sensor;

[0020] The output end of the pulse recoil air pump 2 is connected to the junction of the filling head and the filling needle through a three-way valve. A one-way valve is provided on the pipeline connecting the pulse recoil air pump 2 to the three-way valve. The pulse recoil air pump 2, the dosimeter and the pressure sensor in the filling head are evenly connected to the processor signal.

[0021] According to the above technical solution, a micro camera is provided on the side of the filling head facing the transmission component, the center of the camera angle of the micro camera is facing the output end of the filling needle, and the micro camera is connected to the processor signal;

[0022] An electric telescopic rod is fixedly connected to the frame, and an output end of the electric telescopic rod is fixedly connected to the filling head.

[0023] According to the above technical solution, the transmission component includes a linear motor, and a mounting base is fixedly connected to the output end of the linear motor. A plurality of grooves for placing lithium batteries are opened in the mounting base, and a weighing sensor is embedded in the bottom of the groove. The weighing sensor is connected to the processor signal.

[0024] According to the above technical solution, the center of the upper side of the end cover is fixedly connected to the second drive motor, and one end of the output shaft of the second drive motor passes through the end cover and is located in the filter cavity;

[0025] A connecting frame is provided in the filter screen cylinder, and the connecting frame includes a connecting shaft and a plurality of connecting rods fixedly connected to the outer wall of the connecting shaft. The plurality of connecting rods are provided in two groups, and each group of connecting rods is evenly distributed in a circle with the center of the connecting shaft as the center of the circle. The two groups of connecting rods are distributed on both sides of the axial direction of the connecting shaft, and the ends of the plurality of connecting rods away from the connecting shaft are fixedly connected to the cylinder frame of the filter screen cylinder.

[0026] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a buffering and regulating component to buffer the lithium battery raw materials during the transmission process, thereby reducing the transmission pressure of the slurry and preventing the filling needle from causing injection volume deviation due to sudden pressure changes;

[0027] By setting up an annular elastic airbag, a viscosity sensor, a connecting pipe 2, a pulse recoil air pump 1 and a pulse recoil air pump 2, the viscosity change of the slurry is monitored during the slurry transmission process, and the slurry viscosity is maintained by regulating the flow rate of the annular elastic airbag and the temperature of the connecting pipe 2, thereby ensuring smooth transmission in the pipeline, preventing congestion, and improving the quality and efficiency of lithium battery filling.

[0028] By setting up dosimeters, metering pumps and weighing sensors, the filling accuracy of lithium batteries can be improved through multiple monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the overall front structure of the present invention;

[0032] Figure 3 It is a schematic diagram of the cross-sectional structure of the front view of the stirring assembly of the present invention;

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure of the front view of the filter assembly of the present invention;

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of the front portion of the buffer adjustment assembly of the present invention;

[0035] Figure 6 The present invention Figure 5 Schematic diagram of the local enlarged structure of area A;

[0036] Figure 7 The present invention Figure 5 Schematic diagram of the local enlarged structure of area B;

[0037] Figure 8 The present invention Figure 2 Schematic diagram of the local enlarged structure of the C area;

[0038] Figure 9 It is a schematic diagram of the cross-sectional structure of the front view of the transmission component of the present invention;

[0039] In the figure: 1. Frame; 2. Stirring assembly; 3. Filter assembly; 4. Buffer adjustment assembly; 5. Filling assembly; 6. Transmission assembly; 7. Stirring tank; 8. Feed pipe; 9. Liquid inlet pipe; 10. Agitator; 11. Drive motor 1; 12. Viscosity sensor 1; 13. Flow control valve; 14. Housing 1; 15. Filter chamber; 16. End cover; 17. Connecting pipe 1; 18. Filter screen; 19. Discharge port 1; 20. Discharge port 2; 21. Drive motor 2; 22. Connecting frame; 23. Connecting shaft; 24. Connecting rod; 25. Waste box; 26. Housing 2; 27 , connecting pipe 2; 28, shell 3; 29, buffer chamber; 30, vacuum chamber; 31, vacuum pump; 32, viscosity sensor 2; 33, annular elastic airbag; 34, air cavity; 35, air pipe; 36, pressure pump; 37, inner tube; 38, outer tube; 39, constant temperature chamber; 40, spiral guide vane; 41, metering pump; 42, filling head; 43, pulse recoil air pump 1; 44, filling needle; 45, pulse recoil air pump 2; 46, dosimeter; 47, electric telescopic rod; 48, linear motor; 49, mounting seat; 50, groove; 51, electric control valve; 52, weighing sensor. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] See also Figure 1-9 The present invention provides a technical solution: a filling machine for the production of lithium battery raw materials, comprising a frame 1, on which a stirring component 2, a filtering component 3, a buffer adjustment component 4, and a filling component 5 are arranged from top to bottom, and a transmission component 6 is arranged below the filling component 5.

[0042] like Figure 3 The stirring assembly 2 includes a stirring cylinder 7, which is fixedly connected to the frame 1. The top of the stirring cylinder 7 is fixedly connected to a feed pipe 8 and a liquid feed pipe 9 connected to the stirring cylinder 7. The feed pipe 8 and the liquid feed pipe 9 can respectively quantitatively introduce raw materials and stock liquid into the stirring cylinder 7;

[0043] A rotatable agitator 10 is provided in the mixing tank 7. The agitator 10 is an existing conventional technology. A driving motor 11 is fixedly connected to the center of the outer top of the mixing tank 7. The output shaft of the driving motor 11 passes through the mixing tank 7 and is fixedly connected to the main shaft of the agitator 10, so that the agitator 10 is driven to rotate by the driving motor 11 to mix and evenly stir the materials and liquids input into the mixing tank 7.

[0044] A viscosity sensor 12 is provided on the mixing tank 7 for real-time monitoring of the viscosity of the slurry after stirring in the mixing tank 7 and monitoring whether the slurry viscosity meets the standard. The signal of the viscosity sensor 12 is connected to the processor.

[0045] The lower part of the mixing tank 7 is a conical funnel structure. A flow control valve 13 is fixedly connected to the port at the lower end of the mixing tank 7. The processor is connected to the flow control valve 13 by signal.

[0046] like Figure 4 The filter assembly 3 includes a housing 14, which is fixedly connected to the frame 1. A filter cavity 15 is provided in the housing 14, and the filter cavity 15 is a cavity with an inverted cone structure;

[0047] The upper end of the shell 14 is detachably connected to an end cover 16, and a connecting pipe 17 is fixedly connected to the end cover 16. One end of the connecting pipe 17 is connected to the output end of the flow control valve 13, and the other end of the connecting pipe 17 passes through the end cover 16 and is connected to the filter chamber 15.

[0048] A filter screen cartridge 18 is rotatably connected to the filter chamber 15. The filter screen cartridge 18 is a funnel-shaped structure, and both ends of the filter screen cartridge 18 along the axial direction are open.

[0049] The filter chamber 15 has a discharge port 19 and a discharge port 20 at its lower end. The lower end of the filter screen cylinder 18 is sleeved in the discharge port 19 and is sealed and rotatably connected to the inner wall of the discharge port 19.

[0050] The upper end of the filter screen cylinder 18 is sealed and rotatably connected to the end cover 16. A second drive motor 21 is fixedly connected to the center of the upper side of the end cover 16. One end of the output shaft of the second drive motor 21 passes through the end cover 16 and is located in the filter cavity 15.

[0051] A connecting frame 22 is provided in the filter screen cartridge 18, and the connecting frame 22 includes a connecting shaft 23 and a plurality of connecting rods 24 fixedly connected to the outer wall of the connecting shaft 23. The plurality of connecting rods 24 are provided in two groups, and each group of connecting rods 24 is evenly distributed in a circle with the center of the connecting shaft 23 as the center of the circle. The two groups of connecting rods 24 are distributed on both sides of the axial direction of the connecting shaft 23, and the ends of the plurality of connecting rods 24 away from the connecting shaft 23 are fixedly connected to the cartridge frame of the filter screen cartridge 18.

[0052] The second discharge port 20 is located outside the filter screen cylinder 18 , and the lower inner wall of the filter chamber 15 is inclined toward the second discharge port 20 , so as to facilitate the discharge of the slurry after centrifugal filtration by the filter screen cylinder 18 .

[0053] The discharge port 19 is connected to a waste box 25 through a pipeline. The waste box 25 is fixedly connected to the frame 1 and is used to store large particle slurry that has not been centrifugally filtered out of the filter cylinder 18.

[0054] like Figure 5 The second discharge port 20 is connected to the buffer adjustment component 4, which includes a second shell 26, a second connecting pipe 27, and a third shell 28 arranged in sequence from top to bottom;

[0055] The second shell 26 is fixedly connected to the frame 1. A buffer chamber 29 is provided in the second shell 26. The buffer chamber 29 is an inverted conical cavity. One end of the pipe connecting the second discharge port 20 passes through the second shell 26 and is connected to the buffer chamber 29. The lower port of the buffer chamber 29 is connected to the second connecting pipe 27.

[0056] Shell three 28 is fixedly connected to the frame 1. A vacuum chamber 30 is provided in shell three 28. The vacuum chamber 30 is a quadrangular pyramid-shaped cavity. The output end of connecting tube two 27 is connected to the vacuum chamber 30. A vacuum pump 31 is provided on one side of shell three 28. The vacuum pump 31 is connected to the vacuum chamber 30 through a pipeline. The vacuum pump 31 is fixedly connected to the frame 1 and is connected to the processor signal.

[0057] A viscosity sensor 2 32 is provided on one side where the buffer chamber 29 is connected to the connecting pipe 2 27 for real-time monitoring of the viscosity changes of the slurry. An electric control valve 51 is fixedly connected to the connection between the connecting pipe 2 27 and the buffer chamber 29. A pulse recoil air pump 1 43 is provided at the connection between the connecting pipe 2 27 and the vacuum chamber 30. The electric control valve 51, the viscosity sensor 2 32 and the pulse recoil air pump 1 43 are all connected to the processor signal.

[0058] The output end of the pulse recoil air pump 43 is connected to the connecting pipe 2 27 through a three-way valve. A one-way valve is provided on the pipeline connected to the three-way valve of the pulse recoil air pump 43 to prevent the slurry from entering. The output end of the pulse recoil air pump 43 is facing the direction of slurry inflow, which is convenient for the pulsating recoil air pump to clear the pipeline.

[0059] like Figure 6 , an annular elastic airbag 33 is provided at the port of the buffer chamber 29 near the connecting pipe 27, and the annular elastic airbag 33 is fixedly connected to the inner wall of the buffer chamber 29;

[0060] The annular elastic airbag 33 defines an air cavity 34. An air pipe 35 is provided through the second housing 26 corresponding to the liquid cavity. A pressure pump 36 is provided at the input end of the air pipe 35. The pressure pump 36 is fixedly connected to the frame 1. The output end of the pressure pump 36 is fixedly connected to the air pipe 35. An air pressure sensor is also provided through the second housing 26. The receiving end of the air pressure sensor is located in the air cavity 34 and is used to monitor the air pressure in the air cavity 34.

[0061] The viscosity of the slurry is monitored by the second viscosity sensor 32 on the buffer chamber 29, and the inner diameter of the annular elastic airbag 33 is adjusted by the pressure pump 36, thereby controlling the flow rate of the slurry entering the connecting pipe.

[0062] The air pressure sensor and the pressure pump 36 are both connected to the processor signal. The air pressure in the air cavity 34 is negatively correlated with the inner diameter of the annular elastic airbag 33, that is, the greater the air pressure in the air cavity 34, the smaller the inner diameter of the annular elastic airbag 33.

[0063] The volume of the buffer chamber 29 is 5 times that of the connecting pipe 2 27, thereby buffering the slurry.

[0064] like Figure 7 The second connecting pipe 27 is a double-layer jacket structure. The second connecting pipe 27 includes an inner pipe 37 and an outer pipe 38. The inner pipe 37 is sleeved in the outer pipe 38. A sealed constant temperature chamber 39 is formed between the inner pipe 37 and the outer pipe 38. A spiral guide plate 40 is provided in the constant temperature chamber 39 along its axial direction. The constant temperature chamber 39 is filled with a flowable heat transfer fluid, which is silicone oil.

[0065] A circulating pump is fixedly connected to the frame 1, and the output end of the circulating pump is connected to one end of the constant temperature chamber 39 close to the buffer chamber 29, and the input end of the circulating pump is connected to one end of the constant temperature chamber 39 close to the vacuum chamber 30. A heater and a refrigerator are fixedly connected to the output end pipe of the circulating pump. The heater and the refrigerator are fixedly connected to the frame 1. The heater, refrigerator and circulating pump are all connected to the processor signal. The heater and refrigerator adopt existing conventional technology.

[0066] like Figure 8 The filling components 5 each include a metering pump 41, a filling head 42, a pulse backwash air pump 45 and a filling needle 44;

[0067] The output end of the vacuum chamber 30 is connected to the input end of the metering pump 41. A dosimeter 46 is provided on the pipe connecting the vacuum chamber 30 to the metering pump 41. The dosimeter 46 is vertically fixed to the frame 1.

[0068] The metering pump 41 adopts a precision gear pump or a rotary piston pump, and the dose meter 46 adopts a mass flow meter, which can monitor the dynamic flow of the slurry in the pipeline in real time.

[0069] The output pipe of the metering pump 41 is connected to the filling head 42. The output end of the filling head 42 is fixedly connected to the filling needle 44. The input port of the filling head 42 is embedded with a pressure sensor for monitoring the pressure in the cavity of the filling head 42 to determine whether the filling head is blocked.

[0070] The output end of the pulse recoil air pump 2 45 is connected to the junction of the filling head 42 and the filling needle 44 through a three-way valve. A one-way valve is provided on the pipeline connecting the pulse recoil air pump 2 45 to the three-way valve to prevent the slurry from flowing back. The output end of the pulse recoil air pump 2 45 is facing the direction of the slurry inflow, which facilitates the pulsating recoil air pump to dredge the pipeline;

[0071] When the input end of the filling head 42 is blocked, the pipeline is switched by the three-way valve, so that the pulsating recoil air pump 2 releases a compressed air pulse of 0.5 MPa with a duration of 50 ms, forming an instantaneous reverse shock wave, which is opposite to the normal flow direction of the slurry. At the same time, the shear force generated by the shock wave can break up the agglomerated slurry, thereby clearing the pipeline.

[0072] The pulse recoil air pump 2 45, the dose meter 46 and the pressure sensor in the filling head 42 are evenly connected to the processor signal.

[0073] A micro camera is provided on the side of the filling head 42 facing the transmission component 6, the center of the micro camera's camera angle is facing the output end of the filling needle 44, and the micro camera is connected to the processor signal;

[0074] An electric telescopic rod 47 is fixedly connected to the frame 1 , and an output end of the electric telescopic rod 47 is fixedly connected to the filling head 42 . The filling head 42 is raised and lowered by driving the electric telescopic rod 47 .

[0075] like Figure 9 The transmission component 6 includes a linear motor 48, and a mounting base 49 is fixedly connected to the output end of the linear motor 48. The mounting base 49 has a plurality of grooves 50 for placing lithium batteries. The bottom of the groove 50 is embedded with a weighing sensor 52, and the weighing sensor 52 is connected to the processor signal.

[0076] The weighing sensor 52 is used to monitor the weight of the slurry filled into the lithium battery by the filling component 5, perform static weighing calibration on the lithium battery being filled, and correct the cumulative error generated by the dosimeter 46.

[0077] In this embodiment, a fixed amount of raw materials is delivered into the mixing tank 7 through the feed pipe 8 and the liquid inlet pipe 9, and the drive motor 11 is started to drive the stirrer 10 to rotate, thereby uniformly mixing the material and liquid in the mixing tank 7 into a slurry;

[0078] The viscosity sensor 12 is used to monitor the viscosity of the slurry being stirred in the stirring tank 7 in real time, and the processor presets the target viscosity value of the slurry, which is recorded as A1;

[0079] When the viscosity sensor 12 detects that the viscosity of the slurry in the glue stick tank reaches A1, stirring is stopped and the flow control valve 13 is opened accordingly, so that the slurry in the mixing tank 7 enters the filter assembly 3 through the flow control valve 13;

[0080] The slurry enters the filter screen drum 18 of the filter chamber 15 through the connecting pipe 17, and the driving motor 21 is started to drive the filter screen drum 18 to rotate. As a result, the slurry falling into the filter screen drum 18 generates centrifugal force under the action of rotation. Under the action of centrifugal force, the filter screen drum 18 intercepts large particles of slurry in the filter screen drum 18, and the slurry that passes through the filter screen flows downward from the discharge port 20 into the buffer adjustment component 4;

[0081] The large particle slurry intercepted in the filter screen cylinder 18 enters the waste box 25 through the connecting pipe of the discharge port 19.

[0082] The slurry passing through the filter cylinder 18 enters the buffer chamber 29 and flows downward into the inner tube 37 of the second connecting tube 27. The entering slurry is monitored by the second viscosity sensor 32.

[0083] In the initial state, the inner diameter of the annular elastic airbag 33 is 1 / 2 of the inner diameter of the inner tube 37;

[0084] The actual viscosity value of the slurry monitored by the viscosity sensor 2 32 is preset by the processor and is recorded as A2. When the actual viscosity value A2 of the slurry monitored by the viscosity sensor 2 32 changes based on the viscosity standard value A1 preset by the processor, the temperature of the annular elastic airbag 33 and the heat transfer fluid is adjusted as follows:

[0085] When the viscosity change of A2>A1 does not exceed 50%, the inner diameter of the annular elastic airbag 33 expands outward by a corresponding percentage. At the same time, the silicone oil is heated by 3-8°C under the action of the heater and circulates.

[0086] When the viscosity change of A2>A1 exceeds 50%, there is a risk of blockage. The inner diameter of the annular elastic airbag 33 expands outward to the same diameter as the inner tube 37. At the same time, the silicone oil is heated by 8-10°C under the action of the heater to circulate, and the pulse recoil air pump 1 43 is started to pulse-clear the slurry in the connecting tube 2 27.

[0087] When the viscosity change of A2<A1 does not exceed 50%, the inner diameter of the annular elastic airbag 33 is reduced by a corresponding percentage. At the same time, the silicone oil is cooled by 5-10°C under the action of the heater and circulates.

[0088] When the viscosity change of A2<A1 exceeds 50%, the electric control valve 51 is closed and the machine is shut down.

[0089] The slurry enters the vacuum chamber 30 through the connecting pipe 27, and the vacuum pump 31 is started to make the vacuum chamber 30 at -0.08 to -0.095 MPa, so that the bubbles mixed in the slurry float up and separate from the slurry under the action of the pressure difference.

[0090] Under the action of the metering pump 41, the slurry passes through the vacuum chamber 30 through the pipeline and enters the filling component 5. During this process, the dynamic flow rate of the slurry passing through is monitored by the dosimeter 46.

[0091] Finally, under the action of the metering pump 41, the slurry enters the filling head 42 and flows out through the filling needle 44;

[0092] At this time, the linear motor 48 controls the output end to move through the monitoring of the micro camera, so that the lithium battery on the output end of the linear motor 48 is accurately located below the filling needle 44;

[0093] Under the dual coordinated monitoring of the dosimeter 46 and the weighing sensor 52 , the metering pump 41 is used to accurately inject the slurry into the lithium battery.

[0094] When the pressure sensor embedded in the input end of the filling head 42 detects an abnormal pressure value, the pulse recoil air pump 45 is started to release a 0.5 MPa compressed air pulse with a duration of 50 ms, forming an instantaneous reverse shock wave. The shear force generated by the shock wave can break up the agglomerated slurry, thereby clearing the filling head 42 and preventing the filling needle 44 from being blocked, which affects the filling effect.

[0095] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0096] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A filling machine for lithium battery raw material production, characterized by: The machine comprises a frame (1), wherein a stirring assembly (2), a filtering assembly (3), a buffer adjustment assembly (4), and a filling assembly (5) are sequentially arranged on the frame (1) from top to bottom, and a transmission assembly (6) is arranged below the filling assembly (5); The buffer adjustment component (4) includes a shell 2 (26), a connecting pipe 2 (27), and a shell 3 (28) arranged in sequence from top to bottom, a buffer chamber (29) is provided in the shell 2 (26), a vacuum chamber (30) is provided in the shell 3 (28), a vacuum pump (31) is provided on one side of the shell 3 (28), the vacuum pump (31) is connected to the vacuum chamber (30) through a pipeline, the buffer chamber (29) is connected to the vacuum chamber (30) through the connecting pipe 2 (27), and the volume of the buffer chamber (29) is 5 times the volume of the connecting pipe 2 (27); A second viscosity sensor (32) is provided on the side where the buffer chamber (29) is connected to the second connecting pipe (27); an electric control valve (51) is fixedly connected to the connection between the second connecting pipe (27) and the buffer chamber (29); a first pulse recoil air pump (43) is provided at the connection between the second connecting pipe (27) and the vacuum chamber (30); and the electric control valve (51), the second viscosity sensor (32) and the first pulse recoil air pump (43) are all signal-connected to a processor; The buffer cavity (29) is provided with an annular elastic airbag (33) that undergoes elastic deformation in the radial direction at a port close to one side of the connecting pipe (27). The connecting pipe (27) comprises an inner tube (37) and an outer tube (38). The inner tube (37) is sleeved in the outer tube (38). A sealed constant temperature cavity (39) is formed between the inner tube (37) and the outer tube (38). A spiral guide plate (40) is provided in the constant temperature cavity (39) along its axial direction. The constant temperature cavity (39) is filled with a heat transfer fluid that can circulate.

2. The filling machine for lithium battery raw material production according to claim 1, characterized in that: The annular elastic airbag (33) is provided with an air cavity (34), and the shell 2 (26) is provided with an air pipe (35) corresponding to the liquid cavity. The input end of the air pipe (35) is provided with a pressure pump (36), and the pressure pump (36) is fixedly connected to the frame (1). The output end of the pressure pump (36) is fixedly connected to the air pipe (35). The shell 2 (26) is also provided with an air pressure sensor, and the air pressure sensor and the pressure pump (36) are both connected to the processor signal.

3. The filling machine for lithium battery raw material production according to claim 2, characterized in that: A circulating pump is fixedly connected to the frame (1), the output end of the circulating pump is connected to one end of the constant temperature chamber (39) close to the buffer chamber (29), the input end of the circulating pump is connected to one end of the constant temperature chamber (39) close to the vacuum chamber (30), and a heater and a refrigerator are fixedly connected to the output end pipeline of the circulating pump.

4. The filling machine for lithium battery raw material production according to claim 3, characterized in that: The stirring assembly (2) includes a stirring cylinder (7), the stirring cylinder (7) is fixedly connected to the frame (1), the top of the stirring cylinder (7) is fixedly connected to a feed pipe (8) and a liquid inlet pipe (9) connected to the stirring cylinder (7), a rotatable stirrer (10) is provided in the stirring cylinder (7), a viscosity sensor (12) is passed through the stirring cylinder (7), and a flow control valve (13) is fixedly connected to the port at the lower end of the stirring cylinder (7), and the flow control valve (13) and the viscosity sensor (12) are both connected to the processor signal.

5. The filling machine for lithium battery raw material production according to claim 4, characterized in that: The filter assembly (3) includes a housing (14), a filter chamber (15) is provided in the housing (14), an end cap (16) is detachably connected to the upper end of the housing (14), a connecting pipe (17) is fixedly connected to the end cap (16), one end of the connecting pipe (17) is connected to the output end of the flow control valve (13), and the other end of the connecting pipe (17) passes through the end cap (16) and is connected to the filter chamber (15); A filter screen cartridge (18) is rotatably connected in the filter chamber (15), and a discharge port 1 (19) and a discharge port 2 (20) are provided at the lower end of the filter chamber (15). The lower end of the filter screen cartridge (18) is sleeved in the discharge port 1 (19) and is sealed and rotatably connected to the inner wall of the discharge port 1 (19), and the upper end of the filter screen cartridge (18) is sealed and rotatably connected to the end cover (16); The second discharge port (20) is located outside the filter screen cylinder (18), the lower inner wall of the filter cavity (15) is inclined toward the second discharge port (20), and the second discharge port (20) pipeline is connected to the buffer adjustment component (4); The discharge port 1 (19) is connected to a waste box (25) through a pipe, and the waste box (25) is fixedly connected to the frame (1).

6. The filling machine for lithium battery raw material production according to claim 5, characterized in that: The filling components (5) each include a metering pump (41), a filling head (42), a second pulse recoil air pump (45), and a filling needle (44); the output end of the vacuum chamber (30) is connected to the input end of the metering pump (41); a dosimeter (46) is provided on the pipe connecting the vacuum chamber (30) to the metering pump (41); the dosimeter (46) is vertically fixedly connected to the frame (1); The output end pipeline of the metering pump (41) is connected to the filling head (42), the output end of the filling head (42) is fixedly connected to the filling needle (44), and the input end port of the filling head (42) is embedded with a pressure sensor; The output end of the pulse recoil air pump 2 (45) is connected to the junction of the filling head (42) and the filling needle (44) through a three-way valve. A one-way valve is provided on the pipeline connecting the pulse recoil air pump 2 (45) to the three-way valve. The pulse recoil air pump 2 (45), the dose meter (46) and the pressure sensor in the filling head (42) are evenly connected to the processor signal.

7. The filling machine for lithium battery raw material production according to claim 6, characterized in that: A micro camera is provided on the side of the filling head (42) facing the transmission component (6), the center of the camera angle of the micro camera faces the output end of the filling needle (44), and the micro camera is connected to the processor signal; An electric telescopic rod (47) is fixedly connected to the frame (1), and an output end of the electric telescopic rod (47) is fixedly connected to the filling head (42).

8. The filling machine for lithium battery raw material production according to claim 7, characterized in that: The transmission assembly (6) includes a linear motor (48), an output end of the linear motor (48) is fixedly connected to a mounting seat (49), a plurality of grooves (50) for placing lithium batteries are provided in the mounting seat (49), a weighing sensor (52) is embedded in the bottom of the groove (50), and the weighing sensor (52) is connected to the processor signal.

9. The filling machine for lithium battery raw material production according to claim 8, characterized in that: A second drive motor (21) is fixedly connected to the center of the upper side of the end cover (16), and one end of the output shaft of the second drive motor (21) passes through the end cover (16) and is located in the filter cavity (15); A connecting frame (22) is provided in the filter screen cartridge (18), and the connecting frame (22) includes a connecting shaft (23) and a plurality of connecting rods (24) fixedly connected to the outer wall of the connecting shaft (23). The plurality of connecting rods (24) are provided in two groups, and each group of connecting rods (24) is evenly distributed in a circle with the center of the connecting shaft (23) as the center. The two groups of connecting rods (24) are respectively provided on both sides of the axial direction of the connecting shaft (23), and one end of the plurality of connecting rods (24) away from the connecting shaft (23) is fixedly connected to the cartridge frame of the filter screen cartridge (18).

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