Solid-state battery integrated printing device and printing method thereof

Abstract

The invention relates to a solid-state battery integrated printing device and a printing method thereof. The solid-state battery integrated printing device comprises a rack; the three-axis movement module is used for controlling the printing head to accurately move in the X direction, the Y direction and the Z direction; the ink direct-writing printing module is used for printing positive and negative pole pieces; the ink-jet printing module is used for printing an electrolyte layer and forming a thin film structure by jetting ink; the thermocuring module is used for carrying out rapid in-situ curing on the printing material in the printing process; the printing substrate module is used for providing a printing platform; the data acquisition and monitoring control system is used for controlling and coordinating the operation of the whole printing device; the vacuum pump is used for providing vacuum adsorption required by the printing substrate module; and the air compressor is used for providing pressure required by material extrusion for the ink direct-writing printing module and the ink-jet printing module. The method has the advantages that solid-state battery ink-jet printing and ink direct writing printing modes are integrated, the structure customization design of the positive and negative pole pieces is realized through ink direct writing, and the surface loading capacity of the battery is improved.

Description

Technical Field

[0001] The present invention relates to a solid-state battery integrated printing device and a printing method thereof, and belongs to the field of solid-state battery 3D printing. Background Art

[0002] Solid-state batteries are regarded as the future development direction of lithium battery technology due to their high energy density, high safety, long life and low cost. 3D printing technology is an advanced manufacturing technology that stacks raw materials layer by layer to construct three-dimensional entities based on digital design models. With its high design freedom and rapid prototyping technical advantages, it has become a new technical direction in the field of solid-state battery manufacturing. Compared with traditional electrode manufacturing methods, 3D printing technology can design and construct various complex spatial structures on the electrode surface, which can not only improve the interface contact effect of solid-state batteries and reduce interface impedance, but also effectively increase the battery surface load, thereby improving the battery's energy density and power density.

[0003] At present, the commonly used solid-state battery 3D printing technologies include ink direct writing and inkjet printing. Ink direct writing technology is to extrude a slurry of active materials, solvents and adhesives evenly mixed from a print head under high shear force. The print head moves along a set trajectory, thereby stacking layer by layer to build a solid three-dimensional structure. Ink direct writing technology has a high degree of design freedom and is suitable for the preparation of structured positive and negative electrodes. Inkjet printing is a printing technology based on droplet deposition. It uses a nozzle to spray materials directly on the surface of the printing substrate. By adjusting the volume and frequency of the sprayed ink, complex patterns with high resolution and specific thickness can be created. It is particularly suitable for the construction of high-precision nano-micron-level thin film electrolytes.

[0004] However, existing solid-state battery printing equipment is often only compatible with a single printing technology, and uses one printing technology to print the electrode and electrolyte separately or as a whole. Due to the large differences in the material properties and printing structure design of the electrode electrode and electrolyte, the use of a single printing technology for the overall printing of solid-state batteries cannot give full play to the specific advantages of different printing technologies, affecting the performance of the printed solid-state battery. If different printing technologies are used to print the electrode and electrolyte structure separately and then assemble the battery later, the production efficiency will be greatly reduced, which is not conducive to the commercial production of solid-state battery products. In addition, when printing the electrode or electrolyte, the printing ink or slurry cannot solidify quickly or completely, affecting the number of printed stacking layers. Existing printing equipment often uses the method of heating the printing substrate or transferring the oven to heat after printing. These methods often have low heating efficiency and severely limit the printing efficiency of the battery. Therefore, there is currently a lack of solid-state battery printing equipment that can be compatible with multiple printing technologies and achieve efficient integrated curing and molding. Summary of the invention

[0005] In order to overcome the defects of the prior art, the present invention provides a solid-state battery integrated printing device and a printing method thereof. The technical solution of the present invention is:

[0006] A solid-state battery integrated printing device comprises: a frame; a three-axis motion module, fixedly mounted on the frame, for controlling the precise movement of a print head in the three directions of X, Y and Z; an ink direct writing printing module, mounted on the three-axis motion module, for printing positive and negative electrode sheets, and building an electrode structure layer by layer by extruding slurry; an inkjet printing module, mounted on the three-axis motion module, for printing an electrolyte layer, and forming a thin film structure by jetting ink; a thermal curing module, for rapidly curing the printed material in situ during the printing process to ensure the stability of the printed structure and the drying of the material; a printing substrate module, for providing a printing platform and fixing a current collector by vacuum adsorption; a data acquisition and monitoring control system, for controlling and coordinating the operation of the entire printing device; a vacuum pump, for providing the vacuum adsorption required by the printing substrate module to fix the current collector; and an air compressor, for providing the pressure required for material extrusion for the ink direct writing printing module and the inkjet printing module.

[0007] The three-axis motion module comprises a first Y-axis motion module, a second Y-axis motion module, an X-axis motion module, a first Z-axis motion module, a second Z-axis motion module, a first connecting support plate, a second connecting support plate, a third connecting support plate, a first grating ruler, a second grating ruler, a third grating ruler, a fourth grating ruler and a fifth grating ruler. The first Y-axis motion module and the second Y-axis motion module are fixedly installed on the frame, the first grating ruler is installed on the outer side of the first Y-axis motion module, and the second grating ruler is installed on the outer side of the second Y-axis motion module. One end of the X-axis motion module is connected to the sliding block on the first Y-axis motion module through the first connecting support plate, and the other end is connected to the sliding block on the second Y-axis motion module through the second connecting support plate. The third grating ruler is installed on one side of the X-axis motion module for monitoring the position coordinates of the sliding block in the X-axis motion module.

[0008] The third connecting support plate is arranged vertically with the X-axis motion module and is installed on the sliding block of the X-axis motion module. The first Z-axis motion module is installed at one end of the third connecting support plate, and the second Z-axis motion module is installed at the other end. A fourth grating scale is installed on the side of the first Z-axis motion module, and a fifth grating scale is installed on the side of the second Z-axis motion module. A first support plate is installed on the sliding block of the first Z-axis motion module, and a first linear slide rail and a second linear slide rail which are parallel to each other and form a spacing are installed on the first support plate, which is used to mount a fixed bracket of the ink direct writing printing module.

[0009] The ink direct writing printing module includes a positive ink extrusion unit, a negative ink extrusion unit, a first sliding bracket, a second sliding bracket, a switching mechanism and a distance sensor. The switching mechanism is installed on a first support plate between a first linear slide rail and a second linear slide rail. The first sliding bracket is installed to slide on the first linear guide rail, and the second sliding bracket is installed to slide on the second linear slide rail. The positive ink extrusion unit is installed on the first sliding bracket, and the negative ink extrusion unit is installed on the second sliding bracket. The positive ink extrusion unit and the negative ink extrusion unit are driven by the switching mechanism.

[0010] The positive ink extrusion unit comprises a positive ink micro-stepping motor, a positive ink supply barrel, a positive ink pushing barrel, a positive ink spiral push rod and a positive ink extrusion head. A positive ink micro-stepping motor arranged in a vertical direction is installed on the first sliding bracket, and a positive ink pushing barrel coaxially arranged with the positive ink micro-stepping motor is installed on the positive ink micro-stepping motor. A positive ink extrusion head is installed at the bottom of the positive ink pushing barrel, and a spiral push rod driven by the positive ink micro-stepping motor is installed inside the positive ink pushing barrel. A positive ink feed hole is provided above the positive ink pushing barrel, the positive ink supply barrel is installed on the side of the first sliding bracket, and a positive ink discharge hole is provided at the lower end of the positive ink supply barrel, and the positive ink discharge hole is connected to the positive ink feed hole through a positive ink supply pipe; the air compressor is connected above the positive ink supply barrel to provide extrusion pressure for the slurry in the supply barrel to be supplied to the positive ink pushing barrel.

[0011] The negative electrode ink extrusion unit comprises a negative electrode ink micro-stepping motor, a negative electrode ink supply barrel, a negative electrode ink pushing barrel, a negative electrode ink spiral pushing rod and a negative electrode ink extrusion head. A negative electrode ink micro-stepping motor arranged in a vertical direction is installed on the second sliding bracket. A negative electrode ink pushing barrel coaxially arranged with the negative electrode ink micro-stepping motor is installed on the negative electrode ink micro-stepping motor. A negative electrode ink extrusion head is installed at the bottom of the negative electrode ink pushing barrel. A through hole is installed inside the negative electrode ink pushing barrel. A negative ink spiral pushing rod is driven by a negative ink micro-stepping motor, a negative ink feed hole is provided above the negative ink pushing barrel, the negative ink supply barrel is installed on the side of the second sliding bracket, a negative ink outlet hole is provided at the lower end of the negative ink supply barrel, the negative ink outlet hole is connected to the negative ink feed hole through a negative ink supply pipe; the air compressor is connected above the negative ink supply barrel to provide extrusion pressure for supplying the slurry in the supply barrel to the negative ink pushing barrel.

[0012] The switching mechanism includes a control motor, a first sliding bracket connecting rod, a middle connecting rod and a second sliding bracket connecting rod. The control motor is installed on the first support plate. The middle connecting rod is fixedly installed on the motor output shaft end of the control motor. The first sliding bracket connecting rod and the second sliding bracket connecting rod are respectively arranged on both sides of the middle connecting rod. One end of the first sliding bracket connecting rod is hinged to the middle connecting rod, and the other end is hinged to the first sliding bracket; one end of the second sliding bracket connecting rod is hinged to the middle connecting rod, and the other end is hinged to the second sliding bracket.

[0013] The inkjet printing module is connected to the sliding block of the Z-axis motion module through an inkjet printing bracket. The inkjet printing module includes an inkjet controller, an ink supply tank, and an inkjet head. The inkjet head is connected to the ink supply tank through a connecting pipe. The electrolyte ink to be printed is contained in the ink supply tank. The upper end of the ink supply tank is connected to the air compressor. The electrolyte ink is supplied to the inkjet head through the pressure of the compressed air. The inkjet head is controlled by the inkjet controller.

[0014] The thermal curing module includes an infrared heater, a hot air circulation fan and a temperature sensor. The infrared heater is installed at the lower part of the X-axis motion module. The temperature sensor is also installed at the lower part of the X-axis motion module, close to the two ends of the infrared heater. The hot air circulation fan is installed on one side of the frame, and the air outlet of the hot air circulation fan is directly opposite to the printing substrate module.

[0015] The printing substrate module is located in the central area of ​​the frame and is fixedly connected to the frame by bolts. The printing substrate module includes an upper cover plate and a lower cover plate assembled with the upper cover plate. The surface of the upper cover plate is provided with regularly arranged vacuum adsorption holes, and a hollow flow channel is provided inside. The lower cover plate is a flat plate structure and is sealed with the upper cover plate by sealing bolts. The hollow flow channel is connected to the vacuum pump through a hose, and the distance sensor is installed on the upper surface of the upper cover plate to obtain the Z-axis coordinates of the positive ink extrusion head and the negative ink extrusion head.

[0016] A printing method based on a solid-state battery integrated printing device comprises the following steps: S1. adding electrolyte slurry to the ink supply tank, adding positive electrode slurry to the positive electrode ink supply barrel, adding negative electrode slurry to the negative electrode ink supply barrel, and adsorbing the cut current collector onto the surface of the printing substrate.

[0017] S2. The ink direct writing printing module switches to the working state of the positive ink extrusion head and performs position correction. The data acquisition and monitoring control system obtains the position coordinates of the positive ink extrusion head;

[0018] S3. The three-axis motion module drives the positive electrode ink extrusion head to move along the set path, and at the same time, the positive electrode ink stepping motor in the ink extrusion unit drives the positive electrode ink spiral push rod to quantitatively extrude the positive electrode slurry; after the single layer printing of the positive electrode sheet is completed, the positive electrode ink extrusion head is lifted to the non-working position;

[0019] S4. The thermal curing module is started according to the set program, the hot air circulation fan is turned on, the infrared heater is turned on synchronously, and the entire printed substrate module is scanned horizontally under the drive of the X-axis motion module to achieve rapid curing of the positive electrode sheet; after the scanning is completed, the thermal curing module is closed;

[0020] S5. The inkjet printing module moves to the designated working position, the three-axis motion module drives the inkjet printing head to move along the set path, and the inkjet controller controls the inkjet head to spray the electrolyte material on the surface of the positive electrode sheet according to the set program to complete the electrolyte printing;

[0021] S6. The thermal curing module is started, the hot air circulation fan and the infrared heater are turned on synchronously, the infrared heater scans and heats the entire printed substrate module, and is turned off after the electrolyte curing is completed;

[0022] S7. The ink direct writing printing module switches to the negative ink extrusion head working state and performs position correction. The data acquisition and monitoring control system obtains the position coordinates of the negative ink extrusion head;

[0023] S8. The three-axis motion module drives the negative electrode ink extrusion head to move along the set path, and the ink extrusion unit simultaneously prints the negative electrode sheet on the surface of the solidified electrolyte. After the negative electrode sheet is printed, the negative electrode ink extrusion head is lifted to the non-working position;

[0024] S9. The heat curing module is started, the hot air circulation fan and the infrared heater are turned on synchronously, and the infrared heater scans and heats the entire printed substrate according to the set power, and is turned off after the negative electrode piece is cured. The advantages of the present invention are:

[0025] 1. It integrates the inkjet printing and ink direct writing printing methods of solid-state batteries, and realizes the customized structural design of positive and negative electrodes through ink direct writing to increase the battery surface load. Inkjet printing is used to realize in-situ printing of solid electrolyte films, improve interface contact effects, and increase ion conduction rate. Different printing processes are customized according to the different material properties and printing process requirements of positive and negative electrodes and electrolytes, giving full play to the specific advantages of various printing technologies, and providing a practical new path for the preparation of high-performance solid-state batteries.

[0026] 2. The printed single-layer electrode and electrolyte are heated and cured by combining infrared heater scanning heating with hot air drying. Infrared heater scanning heating can efficiently and evenly cure the single-layer printed structure, preventing deformation and collapse of the printed electrode and electrolyte structure due to long-term non-curing. Combined with hot air drying, the solvent vapor evaporated at high temperature can be blown away in time, effectively improving the curing speed of the printed electrode and electrolyte, and realizing in-situ curing of solid-state batteries.

[0027] 3. The X and Y axes in the three-axis motion module both use linear motors as power sources. Compared with traditional synchronous belt and screw drive structures, they can effectively reduce motion errors, achieve accurate and efficient control of the printing trajectory, and reduce time loss caused by print head switching and needle alignment, providing a practical way for high-precision and high-efficiency solid-state battery structure design and printing.

[0028] 4. The ink direct writing module uses screw extrusion to achieve battery slurry extrusion printing. Compared with traditional compressed air extrusion, the pressure and shear force generated by the rotation of the screw are stable and controllable, which can achieve precise control of the diameter of the printed line. The slurry is further stirred during the extrusion process, which can effectively prevent the slurry particles from agglomerating and alleviate the problem of print head clogging.

[0029] 5. The setting of the switching structure can efficiently realize the switching of multiple print heads on a single mounting bracket, reducing the complexity of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0031] Figure 2 yes Figure 1 Rear view of.

[0032] Figure 3 yes Figure 1 Schematic diagram of the ink direct writing module structure.

[0033] Figure 4 yes Figure 1 Schematic diagram of the structure of the switching mechanism.

[0034] Figure 5 yes Figure 1 Schematic diagram of the structure of the heating module. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are exemplary only and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the scope of protection of the present invention.

[0036] See also Figures 1 to 5 , the present invention relates to a solid-state battery integrated printing device, comprising: a frame 1, used as a supporting structure of the entire printing device;

[0037] The three-axis motion module 2 is fixedly mounted on the frame 1 and is used to control the precise movement of the print head in the three directions of X, Y and Z;

[0038] The ink direct writing printing module 3 is mounted on the three-axis motion module 2 and is used to print the positive and negative electrode sheets and build the electrode structure layer by layer by extruding the slurry;

[0039] The inkjet printing module 4 is mounted on the three-axis motion module 2 and is used to print the electrolyte layer and form a thin film structure by jetting ink;

[0040] Thermal curing module 5, used for rapid in-situ curing of printed materials during the printing process to ensure the stability of the printed structure and the dryness of the materials;

[0041] The printing substrate module 6 is used to provide a printing platform and fix the current collector by vacuum adsorption; the data acquisition and monitoring control system 7 is used to control and coordinate the operation of the entire printing device; the vacuum pump 8 is used to provide the vacuum adsorption required by the printing substrate module 6 to fix the current collector;

[0042] The air compressor 9 is used to provide the ink direct writing printing module 3 and the inkjet printing module 4 with the pressure required for material extrusion.

[0043] Based on the above structure, the following advantages are achieved:

[0044] The device integrates two technologies: ink direct writing printing and inkjet printing. It can simultaneously process the printing of positive and negative electrode sheets and electrolyte layers. This allows the printing of electrodes and electrolytes to be completed on one device, improving production efficiency and process flexibility.

[0045] High-precision printing: The three-axis motion module 2 can control the precise movement of the print head in the three directions of X, Y, and Z, which helps to achieve high-precision printing and ensure the accuracy and consistency of the battery structure.

[0046] Rapid in-situ curing: The thermal curing module 5 performs rapid in-situ curing of the printed material during the printing process, which helps improve production efficiency while ensuring the stability of the printed structure and the dryness of the material, thereby improving the performance and reliability of the battery.

[0047] Automatic control: The data acquisition and monitoring control system 7 can control and coordinate the operation of the entire printing device, realize automatic production, reduce manual intervention, and improve production efficiency and product consistency.

[0048] Vacuum adsorption to fix the current collector: The printing substrate module 6 fixes the current collector by vacuum adsorption, which helps to maintain a stable position of the current collector during the printing process, prevent displacement, and ensure printing quality.

[0049] Stable pressure supply: The air compressor 9 provides a stable material extrusion pressure for the ink direct writing printing module 3 and the inkjet printing module 4, which helps to maintain the continuity of the printing process and the uniformity of material extrusion.

[0050] Design flexibility: Due to the integration of multiple printing technologies, the device can be adapted to different printing needs, including different materials and designs, which provides greater flexibility in battery design.

[0051] The three-axis motion module 2 includes a first Y-axis motion module 10, a second Y-axis motion module 11, an X-axis motion module 12, a first Z-axis motion module 13, a second Z-axis motion module 14, a first connecting support plate 15, a second connecting support plate 16, a third connecting support plate 17, a first grating ruler 18, a second grating ruler 19, a third grating ruler 20, a fourth grating ruler 21 and a fifth grating ruler 22. The first Y-axis motion module 10 and the second Y-axis motion module 11 are fixedly installed on the frame 1. The outer side of the Y-axis motion module 10 is installed with a first grating ruler 18, and the outer side of the second Y-axis motion module 11 is installed with a second grating ruler 19. The first grating ruler 18 is used to monitor the position coordinates of the sliding block on the first Y-axis motion module 10; the second grating ruler 19 is used to monitor the position coordinates of the sliding block of the second Y-axis motion module 11; one end of the X-axis motion module 12 is connected to the sliding block on the first Y-axis motion module 10 through the first connecting support plate 15, and the other end is connected to the second Y-axis motion module 11 through the second connecting support plate 16. The third grating ruler 20 is installed on one side of the X-axis motion module 12 to monitor the position coordinates of the sliding block in the X-axis motion module 12; the third connecting support plate 17 is vertically arranged with the X-axis motion module 12 and is installed on the sliding block of the X-axis motion module 12, the first Z-axis motion module 13 is installed at one end of the third connecting support plate 17, and the second Z-axis motion module 14 is installed at the other end, and the side of the first Z-axis motion module 13 is installed There is a fourth grating ruler 21, which monitors the sliding block position of the first Z-axis motion module 13; a fifth grating ruler 22 is installed on the side of the second Z-axis motion module 14, and the fifth grating ruler monitors the sliding block position of the second Z-axis motion module 14, wherein a first support plate 23 is installed on the sliding block of the first Z-axis motion module 13, and a first linear slide rail 24 and a second linear slide rail 25 which are parallel to each other and form a spacing are installed on the first support plate 23, which are used to mount a fixed bracket of the ink direct writing printing module.

[0052] The design of the three-axis motion module 2 has the following advantages:

[0053] Precise positioning: By installing a grating ruler (the first grating ruler 18, the second grating ruler 19, the third grating ruler 20, the fourth grating ruler 21 and the fifth grating ruler 22) next to each motion module, the position coordinates of the sliding block on each axis can be accurately monitored, thereby achieving high-precision position control.

[0054] Modular design: Each motion module (first Y-axis motion module 10, second Y-axis motion module 11, X-axis motion module 12, first Z-axis motion module 13, second Z-axis motion module 14) is designed as an independent module, which is convenient for maintenance and replacement, and also facilitates the expansion and upgrade of the overall structure.

[0055] Stability: Since the first Y-axis motion module 10 and the second Y-axis motion module 11 are fixed on the frame 1, this design helps to reduce vibration and improve the stability of the entire system.

[0056] The ink direct writing printing module 3 includes a positive ink extrusion unit 26, a negative ink extrusion unit 27, a first sliding bracket 28, a second sliding bracket 29, a switching mechanism 30 and a distance sensor 31. The switching mechanism 30 is installed on the first support plate 23 between the first linear slide rail 24 and the second linear slide rail 25. The first sliding bracket 28 is installed to slide on the first linear guide rail 24, and the second sliding bracket 29 is installed to slide on the second linear slide rail 24. The positive ink extrusion unit 26 is installed on the first sliding bracket 28, and the negative ink extrusion unit 27 is installed on the second sliding bracket 29. The positive ink extrusion unit 26 and the negative ink extrusion unit 27 are driven by the switching mechanism 30.

[0057] The design of the ink direct writing printing module 3 has the following advantages:

[0058] Bipolar ink extrusion unit: By integrating the positive ink extrusion unit 26 and the negative ink extrusion unit 27, positive and negative inks can be processed simultaneously, which is very important for batteries or other printing applications requiring bipolar materials.

[0059] Precise control: The distance sensor 31 can monitor the distance between the print head and the printing material, ensuring precise control during the printing process, which is crucial to maintaining print quality.

[0060] Switching mechanism: The switching mechanism 30 allows for rapid switching between the positive and negative ink extrusion units, improving printing efficiency, especially in applications where alternating printing of positive and negative electrode materials is required.

[0061] The positive ink extrusion unit 26 includes a positive ink micro-stepping motor 32, a positive ink supply barrel 33, a positive ink push barrel 34, a positive ink spiral push rod 35 and a positive ink extrusion head 36. The positive ink micro-stepping motor 32 arranged in the vertical direction is installed on the first sliding bracket 28, and the positive ink push barrel 34 coaxially arranged with the positive ink micro-stepping motor 32 is installed on the positive ink micro-stepping motor 32. The positive ink extrusion head 36 is installed at the bottom of the positive ink push barrel 34. A spiral push rod 35 driven by a positive ink micro stepping motor 32 is installed inside, a positive ink feed hole is provided above the positive ink pushing barrel 34, the positive ink supply barrel 33 is installed on the side of the first sliding bracket 28, a positive ink discharge hole is provided at the lower end of the positive ink supply barrel 33, the positive ink discharge hole and the positive ink feed hole are connected by a positive ink supply pipe; the air compressor is connected above the positive ink supply barrel 33, which is used to provide extrusion pressure for supplying the slurry in the supply barrel to the positive ink pushing barrel 34.

[0062] During operation, the slurry in the supply barrel 33 enters the positive ink push barrel 34 through the supply pipe under the extrusion of compressed air, and the positive ink spiral push rod 35 in the positive ink push barrel 34 is driven by the positive ink micro-stepping motor 32 to extrude the slurry from the positive ink extrusion head 36 at a set speed. By adjusting the speed of the positive ink micro-stepping motor and the diameter of the positive ink extrusion head, the precise control of the printing slurry line diameter can be achieved, and the spiral-propelled slurry extrusion pressure is higher than the traditional compressed air extrusion method, which can effectively alleviate the problem of slurry clogging the print head. During the printing process, the slurry in the positive ink push barrel will be stirred by the positive ink spiral push rod, which can effectively prevent the slurry particles from agglomerating and further improve the printing quality of the electrode sheet.

[0063] The design of the positive electrode ink extrusion unit 26 has the following advantages:

[0064] Integrated design: The positive ink micro stepping motor 32, the positive ink supply barrel 33, the positive ink push barrel 34, the positive ink spiral push rod 35 and the positive ink extrusion head 36 are integrated into one unit, making the entire extrusion process more compact and efficient.

[0065] Precise control: The positive ink micro-stepping motor 32 can precisely control the rotation of the spiral push rod 35, thereby precisely controlling the extrusion amount and extrusion speed of the ink, which is crucial to printing accuracy.

[0066] Continuous feeding: The design of the positive ink supply cylinder 33 and the positive ink push cylinder 34 allows continuous feeding, ensuring the continuity and stability of the ink supply during the printing process.

[0067] Easy maintenance: Due to the modular design of the various components, maintenance and replacement of parts (such as the auger 35 or the print head 36) becomes more convenient.

[0068] Efficient extrusion: The air compressor provides extrusion pressure for the slurry in the positive ink supply barrel 33, thereby improving the extrusion efficiency and ensuring the fluidity of the ink during the printing process.

[0069] The negative ink extrusion unit 27 includes a negative ink micro-stepping motor 37, a negative ink supply barrel 38, a negative ink push barrel 39, a negative ink spiral push rod 40, and a negative ink extrusion head 41. The negative ink micro-stepping motor 37 arranged in the vertical direction is installed on the second sliding bracket 29, and a negative ink push barrel 39 coaxially arranged with the negative ink micro-stepping motor 37 is installed on the negative ink micro-stepping motor 37. The negative ink extrusion head 41 is installed at the bottom of the negative ink push barrel 39. A negative ink spiral push rod 40 driven by a negative ink micro-stepping motor 37 is installed inside, a negative ink feed hole is provided above the negative ink push barrel 39, the negative ink supply barrel 38 is installed on the side of the second sliding bracket 29, a negative ink discharge hole is provided at the lower end of the negative ink supply barrel 38, and the negative ink discharge hole is connected to the negative ink feed hole through a negative ink supply pipe; the air compressor is connected above the negative ink supply barrel 38 to provide extrusion pressure for the slurry in the supply barrel to the negative ink push barrel 39. The working principle is the same as that of the positive ink extrusion unit 26.

[0070] The design of the negative electrode ink extrusion unit 27 has the following advantages:

[0071] Precise control: The negative ink micro-stepping motor 37 can precisely control the rotation of the negative ink spiral push rod 40, thereby precisely controlling the extrusion amount and extrusion speed of the ink, which is crucial to printing accuracy.

[0072] Integrated design: The negative ink micro stepping motor 37, the negative ink supply barrel 38, the negative ink push barrel 39, the negative ink spiral push rod 40 and the negative ink extrusion head 41 are integrated into one unit, making the entire extrusion process more compact and efficient.

[0073] Continuous feeding: The design of the negative ink supply cylinder 38 and the negative ink push cylinder 39 allows continuous feeding, ensuring the continuity and stability of the ink supply during the printing process.

[0074] The switching mechanism 30 includes a control motor 42, a first sliding bracket connecting rod 43, a middle connecting rod 44 and a second sliding bracket connecting rod 45. The control motor 42 is installed on the first support plate 23. The middle connecting rod 44 is fixedly installed on the motor output shaft end of the control motor 42. The first sliding bracket connecting rod 43 and the second sliding bracket connecting rod 45 are respectively arranged on both sides of the middle connecting rod 44. One end of the first sliding bracket connecting rod 43 is hinged on the middle connecting rod 44, and the other end is hinged on the first sliding bracket 28; one end of the second sliding bracket connecting rod 45 is hinged on the middle connecting rod 44, and the other end is hinged on the second sliding bracket 29; the distance sensor 31 is installed on the upper surface of the printing substrate module 6, and is used to obtain the Z-axis coordinates of the positions of the tips of the positive and negative ink extruders.

[0075] When not in operation, the middle connecting rod 44 remains horizontal, the corresponding fixed bracket 28 and fixed bracket 29 are in the initial position, and the positive ink extrusion unit 26 and the negative ink extrusion unit 27 are in the zero position. When the positive ink extrusion unit 26 performs a printing task, the control motor 42 drives the middle connecting rod 44 to rotate counterclockwise to a preset angle, and the middle connecting rod 44 drives the first sliding bracket 28 to move downward to the lower limit position along the first linear slide rail 24 through the first sliding bracket connecting rod 43, and the positive ink extrusion unit 26 fixed on the first sliding bracket 28 reaches the working position. At the same time, the middle connecting rod 44 drives the second sliding bracket 29 to move upward to the upper limit position along the linear slide rail 25 through the second sliding bracket connecting rod 45, and the negative ink extrusion unit 27 is driven away from the working area by the second sliding bracket 29, thereby preventing the extrusion head from scratching the printed model.

[0076] After the printing task is completed, the control motor 42 drives the middle connecting rod 44 to return to the horizontal position, and the positive ink extrusion unit 26 and the negative ink extrusion unit 27 return to the zero position. When the negative ink extrusion unit 27 performs the printing task, the control motor 42 drives the middle connecting rod 44 to rotate clockwise by a preset angle, and the negative ink extrusion unit 27 reaches the working position driven by the second sliding bracket 29, and the positive ink extrusion unit 26 is away from the working area.

[0077] The inkjet printing module 4 is connected to the sliding block of the Z-axis motion module 14 through an inkjet printing bracket 49. The inkjet printing module 4 includes an inkjet controller 46, an ink supply tank 47, and an inkjet head 48. The inkjet head 48 is connected to the ink supply tank 47 through a connecting pipe. The ink supply tank 47 is filled with electrolyte ink to be printed. The upper end of the ink supply tank 47 is connected to the air compressor, and the electrolyte ink is supplied to the inkjet head 48 through the pressure of compressed air. The inkjet head 48 is controlled by the inkjet controller 46.

[0078] The thermal curing module 5 includes an infrared heater 50, a hot air circulation fan 51 and a temperature sensor 52. The infrared heater 50 is installed at the bottom of the X-axis motion module 12. The heater type is a linear focusing infrared heater, which can quickly and efficiently radiate heat into the linear heating area to achieve rapid heating and drying of the printed thin layer. The temperature sensor 52 is also installed at the bottom of the X-axis motion module 12, and is close to the two ends of the infrared heater 50. The temperature data in the linear heating area is obtained in real time through non-contact measurement, and the data is transmitted to the digital acquisition control system 7 to feedback and adjust the heating power and heating temperature of the infrared heater 50. The hot air circulation fan 51 is installed on one side of the frame 1, and the air outlet position of the hot air circulation fan 51 is directly opposite to the printing substrate module 6. When the hot air circulation fan is working, it can generate a stable horizontal hot air flow on the surface of the printing substrate by cooperating with the infrared heater, so as to quickly blow away the high-temperature solvent vapor generated by the radiation heating on the surface of the printing model, and accelerate the curing and drying speed of the printing model.

[0079] The printing substrate module 6 is located in the center area of ​​the frame 1 and is fixedly connected to the frame 1 by bolts. The printing substrate module 6 includes an upper cover plate and a lower cover plate assembled with the upper cover plate, and is made of high-temperature alloy or stainless steel. The upper cover plate is provided with regularly arranged vacuum adsorption holes on its surface, and a hollow flow channel is provided inside; the lower cover plate is a flat plate structure, and is sealed with the upper cover plate by sealing bolts; the hollow flow channel is connected to the vacuum pump 8 through a hose. When working, the vacuum pump 8 is turned on to extract the air in the flow channel in the substrate, and a negative pressure is generated in the printing substrate cavity, and the current collector is tightly adsorbed on the surface of the printing substrate by the negative pressure. The distance sensor 31 is installed on the upper surface of the upper cover plate 6, and is used to obtain the Z-axis coordinates of the positive and negative ink extruder heads.

[0080] The present invention also relates to a printing method based on a solid-state battery integrated printing device, comprising the following steps:

[0081] S1. Add electrolyte slurry to the ink supply tank, add positive electrode slurry to the positive electrode ink supply cylinder, add negative electrode slurry to the negative electrode ink supply cylinder, and adsorb the cut current collector to the surface of the printing substrate.

[0082] S2. The ink direct writing printing module switches to the working state of the positive ink extrusion head and performs position correction. The data acquisition and monitoring control system obtains the position coordinates of the positive ink extrusion head;

[0083] S3. The three-axis motion module drives the positive electrode ink extrusion head to move along the set path, and at the same time, the positive electrode ink stepping motor in the ink extrusion unit drives the positive electrode ink spiral push rod to quantitatively extrude the positive electrode slurry; after the single layer printing of the positive electrode sheet is completed, the positive electrode ink extrusion head is lifted to the non-working position;

[0084] S4. The thermal curing module is started according to the set program, the hot air circulation fan is turned on, the infrared heater is turned on synchronously, and the entire printed substrate module is scanned horizontally under the drive of the X-axis motion module to achieve rapid curing of the positive electrode sheet; after the scanning is completed, the thermal curing module is closed;

[0085] S5. The inkjet printing module moves to the designated working position, the three-axis motion module drives the inkjet printing head to move along the set path, and the inkjet controller controls the inkjet head to spray the electrolyte material on the surface of the positive electrode sheet according to the set program to complete the electrolyte printing;

[0086] S6. The thermal curing module is started, the hot air circulation fan and the infrared heater are turned on synchronously, the infrared heater scans and heats the entire printed substrate module, and is turned off after the electrolyte curing is completed;

[0087] S7. The ink direct writing printing module switches to the negative ink extrusion head working state and performs position correction. The data acquisition and monitoring control system obtains the position coordinates of the negative ink extrusion head;

[0088] S8. The three-axis motion module drives the negative electrode ink extrusion head to move along the set path, and the ink extrusion unit simultaneously prints the negative electrode sheet on the surface of the solidified electrolyte. After the negative electrode sheet is printed, the negative electrode ink extrusion head is lifted to the non-working position;

[0089] S9. The thermal curing module starts, the hot air circulation fan and the infrared heater are turned on synchronously, the infrared heater scans and heats the entire printed substrate according to the set power, and is turned off after the negative electrode is cured.

[0090] 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 according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solid-state battery integrated printing device, characterized in that: include: frame; The three-axis motion module is fixedly installed on the frame and is used to control the precise movement of the print head in the X, Y, and Z directions; The ink direct writing printing module is mounted on the three-axis motion module and is used to print positive and negative electrode sheets, and build the electrode structure layer by layer by extruding the slurry; The inkjet printing module is mounted on the three-axis motion module and is used to print the electrolyte layer and form a thin film structure by jetting ink; Thermal curing module, used to quickly cure the printed material in situ during the printing process to ensure the stability of the printed structure and the dryness of the material; A printing substrate module is used to provide a printing platform and fix the current collector by vacuum adsorption; Data acquisition and monitoring control system, used to control and coordinate the operation of the entire printing device; A vacuum pump is used to provide the vacuum adsorption required by the printing substrate module to fix the current collector; Air compressor, used to provide the pressure required for material extrusion for the ink direct writing printing module and inkjet printing module.

2. The solid-state battery integrated printing device according to claim 1, characterized in that: The three-axis motion module comprises a first Y-axis motion module, a second Y-axis motion module, an X-axis motion module, a first Z-axis motion module, a second Z-axis motion module, a first connecting support plate, a second connecting support plate, a third connecting support plate, a first grating ruler, a second grating ruler, a third grating ruler, a fourth grating ruler and a fifth grating ruler. The first Y-axis motion module and the second Y-axis motion module are fixedly installed on the frame, the first grating ruler is installed on the outer side of the first Y-axis motion module, and the second grating ruler is installed on the outer side of the second Y-axis motion module. One end of the X-axis motion module is connected to the sliding block on the first Y-axis motion module through the first connecting support plate, and the other end is connected to the sliding block on the second Y-axis motion module through the second connecting support plate. The third grating ruler is installed on one side of the X-axis motion module for monitoring the position coordinates of the sliding block in the X-axis motion module. The third connecting support plate is arranged vertically with the X-axis motion module and is installed on the sliding block of the X-axis motion module. The first Z-axis motion module is installed at one end of the third connecting support plate, and the second Z-axis motion module is installed at the other end. A fourth grating scale is installed on the side of the first Z-axis motion module, and a fifth grating scale is installed on the side of the second Z-axis motion module. A first support plate is installed on the sliding block of the first Z-axis motion module, and a first linear slide rail and a second linear slide rail which are parallel to each other and form a spacing are installed on the first support plate, which is used to mount a fixed bracket of the ink direct writing printing module.

3. The solid-state battery integrated printing device according to claim 1 or 2, characterized in that: The ink direct writing printing module includes a positive ink extrusion unit, a negative ink extrusion unit, a first sliding bracket, a second sliding bracket, a switching mechanism and a distance sensor. The switching mechanism is installed on a first support plate between a first linear slide rail and a second linear slide rail. The first sliding bracket is installed to slide on the first linear guide rail, and the second sliding bracket is installed to slide on the second linear slide rail. The positive ink extrusion unit is installed on the first sliding bracket, and the negative ink extrusion unit is installed on the second sliding bracket. The positive ink extrusion unit and the negative ink extrusion unit are driven by the switching mechanism.

4. The solid-state battery integrated printing device according to claim 3, characterized in that: The positive ink extrusion unit comprises a positive ink micro-stepping motor, a positive ink supply barrel, a positive ink pushing barrel, a positive ink spiral push rod and a positive ink extrusion head. A positive ink micro-stepping motor arranged in a vertical direction is installed on the first sliding bracket, and a positive ink pushing barrel coaxially arranged with the positive ink micro-stepping motor is installed on the positive ink micro-stepping motor. A positive ink extrusion head is installed at the bottom of the positive ink pushing barrel, and a spiral push rod driven by the positive ink micro-stepping motor is installed inside the positive ink pushing barrel. A positive ink feed hole is provided above the positive ink pushing barrel, the positive ink supply barrel is installed on the side of the first sliding bracket, and a positive ink discharge hole is provided at the lower end of the positive ink supply barrel, and the positive ink discharge hole is connected to the positive ink feed hole through a positive ink supply pipe; the air compressor is connected above the positive ink supply barrel to provide extrusion pressure for the slurry in the supply barrel to be supplied to the positive ink pushing barrel.

5. The solid-state battery integrated printing device according to claim 4, characterized in that: The negative electrode ink extrusion unit comprises a negative electrode ink micro-stepping motor, a negative electrode ink supply barrel, a negative electrode ink pushing barrel, a negative electrode ink spiral pushing rod and a negative electrode ink extrusion head. A negative electrode ink micro-stepping motor arranged in a vertical direction is installed on the second sliding bracket. A negative electrode ink pushing barrel coaxially arranged with the negative electrode ink micro-stepping motor is installed on the negative electrode ink micro-stepping motor. A negative electrode ink extrusion head is installed at the bottom of the negative electrode ink pushing barrel. A through hole is installed inside the negative electrode ink pushing barrel. A negative ink spiral pushing rod is driven by a negative ink micro-stepping motor, a negative ink feed hole is provided above the negative ink pushing barrel, the negative ink supply barrel is installed on the side of the second sliding bracket, a negative ink outlet hole is provided at the lower end of the negative ink supply barrel, the negative ink outlet hole is connected to the negative ink feed hole through a negative ink supply pipe; the air compressor is connected above the negative ink supply barrel to provide extrusion pressure for supplying the slurry in the supply barrel to the negative ink pushing barrel.

6. The solid-state battery integrated printing device according to claim 5, characterized in that: The switching mechanism includes a control motor, a first sliding bracket connecting rod, a middle connecting rod and a second sliding bracket connecting rod. The control motor is installed on the first support plate. The middle connecting rod is fixedly installed on the motor output shaft end of the control motor. The first sliding bracket connecting rod and the second sliding bracket connecting rod are respectively arranged on both sides of the middle connecting rod. One end of the first sliding bracket connecting rod is hinged to the middle connecting rod, and the other end is hinged to the first sliding bracket; one end of the second sliding bracket connecting rod is hinged to the middle connecting rod, and the other end is hinged to the second sliding bracket.

7. The solid-state battery integrated printing device according to claim 6, characterized in that: The inkjet printing module is connected to the sliding block of the Z-axis motion module through an inkjet printing bracket. The inkjet printing module includes an inkjet controller, an ink supply tank, and an inkjet head. The inkjet head is connected to the ink supply tank through a connecting pipe. The electrolyte ink to be printed is contained in the ink supply tank. The upper end of the ink supply tank is connected to the air compressor. The electrolyte ink is supplied to the inkjet head through the pressure of the compressed air. The inkjet head is controlled by the inkjet controller.

8. The solid-state battery integrated printing device according to claim 7, characterized in that: The thermal curing module includes an infrared heater, a hot air circulation fan and a temperature sensor. The infrared heater is installed at the lower part of the X-axis motion module. The temperature sensor is also installed at the lower part of the X-axis motion module, close to the two ends of the infrared heater. The hot air circulation fan is installed on one side of the frame, and the air outlet of the hot air circulation fan is directly opposite to the printing substrate module.

9. The solid-state battery integrated printing device according to claim 7, characterized in that: The printing substrate module is located in the central area of ​​the frame and is fixedly connected to the frame by bolts. The printing substrate module includes an upper cover plate and a lower cover plate assembled with the upper cover plate. The surface of the upper cover plate is provided with regularly arranged vacuum adsorption holes, and a hollow flow channel is provided inside. The lower cover plate is a flat plate structure and is sealed with the upper cover plate by sealing bolts. The hollow flow channel is connected to the vacuum pump through a hose, and the distance sensor is installed on the upper surface of the upper cover plate to obtain the Z-axis coordinates of the positive ink extrusion head and the negative ink extrusion head.

10. A printing method based on the solid-state battery integrated printing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Add electrolyte slurry to the ink supply tank, add positive electrode slurry to the positive electrode ink supply cylinder, add negative electrode slurry to the negative electrode ink supply cylinder, and adsorb the cut current collector to the surface of the printing substrate. S2. The ink direct writing printing module switches to the working state of the positive ink extrusion head and performs position correction. The data acquisition and monitoring control system obtains the position coordinates of the positive ink extrusion head; S3. The three-axis motion module drives the positive electrode ink extrusion head to move along the set path, and at the same time, the positive electrode ink stepping motor in the ink extrusion unit drives the positive electrode ink spiral push rod to quantitatively extrude the positive electrode slurry; after the single layer printing of the positive electrode sheet is completed, the positive electrode ink extrusion head is lifted to the non-working position; S4. The thermal curing module is started according to the set program, the hot air circulation fan is turned on, the infrared heater is turned on synchronously, and the entire printed substrate module is scanned horizontally under the drive of the X-axis motion module to achieve rapid curing of the positive electrode sheet; after the scanning is completed, the thermal curing module is closed; S5. The inkjet printing module moves to the designated working position, the three-axis motion module drives the inkjet printing head to move along the set path, and the inkjet controller controls the inkjet head to spray the electrolyte material on the surface of the positive electrode sheet according to the set program to complete the electrolyte printing; S6. The thermal curing module is started, the hot air circulation fan and the infrared heater are turned on synchronously, the infrared heater scans and heats the entire printed substrate module, and is turned off after the electrolyte curing is completed; S7. The ink direct writing printing module switches to the negative ink extrusion head working state and performs position correction, and the data acquisition and monitoring control system obtains the position coordinates of the negative ink extrusion head; S8. The three-axis motion module drives the negative electrode ink extrusion head to move along the set path, and the ink extrusion unit simultaneously prints the negative electrode sheet on the surface of the solidified electrolyte. After the negative electrode sheet is printed, the negative electrode ink extrusion head is lifted to the non-working position; S9. The thermal curing module starts, the hot air circulation fan and the infrared heater are turned on synchronously, the infrared heater scans and heats the entire printed substrate according to the set power, and is turned off after the negative electrode is cured.

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