Solid-state battery production process and battery production equipment

Abstract

The utility model relates to battery production technical field discloses solid state battery production process flow and battery production equipment, include: the solid state battery production process flow is based on the realization of integrated production line in full -enclosed production environment, wherein, production environment adopts full -enclosed glove box, and the inert gas is filled in glove box inside, in the utility model, through the full -enclosed inert gas circulation glove box construction core production environment, and the supporting water oxygen detection module can monitor in real time and open gas circulation filtration automatically, and the inert gas airtight dehydration deoxygenation is realized in combination with circulating fan and purifier, and the dehydration deoxygenation material can also be regenerated through the program, and the waterless anaerobic state in the box is always maintained, simultaneously, the glove box pressure is automatically controlled by PLC, and the external material can enter only after dehydration deoxygenation through the transition box, effectively avoids moisture, oxygen and impurity pollution, guarantees the material stability in solid state battery production process from the root, and reduces the battery performance difference caused by environmental fluctuation, improves product consistency.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to the production process and equipment for solid-state batteries. Background Technology

[0002] Solid-state batteries, as a new generation of energy storage devices, have significant advantages over traditional liquid electrolyte lithium batteries, such as high energy density, fast charging speed, and strong safety (no risk of electrolyte leakage). They have broad application prospects in new energy vehicles, portable electronic devices, energy storage systems, and other fields, and have become one of the core directions of battery technology research and development and industrial layout.

[0003] However, current solid-state battery production technology has the following problems: the electrode materials and solid electrolytes of solid-state batteries are extremely sensitive to moisture and oxygen. Even trace amounts of water and oxygen can cause material deterioration and abnormal interface reactions, thereby reducing the battery's cycle life and safety performance. Moreover, existing solid-state battery production relies heavily on segmented equipment operations. From separator / electrode cutting, cell stacking, tab welding to aluminum-plastic film encapsulation, manual material handling or equipment fixture replacement is required. This not only poses a risk of material contamination but also leads to low production efficiency and high labor costs. At the same time, there is a lack of coordinated control logic between different pieces of equipment. For example, the cutting of positive and negative electrodes is prone to cross-contamination, affecting battery performance. Key parameters such as stacking accuracy and encapsulation temperature and pressure are difficult to control uniformly, resulting in poor product consistency and difficulty in improving yield. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a solid-state battery production process and battery production equipment.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a solid-state battery manufacturing process and battery manufacturing equipment, including:

[0006] The solid-state battery production process is based on a fully enclosed production environment and an integrated production line. The production environment uses a fully enclosed glove box, which is filled with inert gas. All pneumatic components in the production line are driven by inert gas to avoid product contamination.

[0007] The integrated production line consists of an inert gas circulating glove box, a diaphragm cutting machine, a diaphragm straightening machine, a negative electrode cutting machine, a positive electrode cutting machine, positive and negative electrode material boxes, a stacking machine, a U-shaped adhesive applicator, a flat press, a cell straightening machine, an ultrasonic welding machine, a tab adhesive applicator, an aluminum-plastic film straightening machine, a top and side sealing machine, a liquid injection platform, a vacuum sealing machine, a fixture platform, and a fully automatic seven-axis robotic arm.

[0008] Material transfer and workstation docking in the production line are all completed by the fully automatic seven-axis robotic arm, and the negative electrode cutting machine and the positive electrode cutting machine are used to cut the positive electrode and the negative electrode respectively to prevent cross-contamination.

[0009] As a further description of the above technical solution: the inert gas circulating glove box is equipped with a water and oxygen detection module, which can automatically activate the internal gas circulation and filtration function based on the water and oxygen detection results inside the box; the glove box is also equipped with a large feed transition hopper and a small feed transition hopper, and the internal pressure is automatically controlled by a PLC control system, and the pressure parameters can be set on the glove box control touch screen; the inert gas inside the glove box is continuously dehydrated and deoxygenated through a closed-loop circulation fan and purifier, and the dehydrated and deoxygenated material can be regenerated through program control; external production materials must be dehydrated and deoxygenated in the transition box before entering the glove box and being transferred to the designated material placement box.

[0010] As a further description of the above technical solution: the diaphragm cutting machine uses a stepper motor and an unwinding shaft connected by a synchronous belt to achieve active unwinding of the diaphragm; both the front and back sides of the diaphragm path of the diaphragm cutting machine are equipped with antistatic devices; the diaphragm path is also equipped with a tension control mechanism, which can achieve different tension control by adjusting the cylinder pressure according to the diaphragm width; the material pulling mechanism of the diaphragm cutting machine is driven by a servo motor and a ball screw, with a repeatability accuracy of ±0.05mm; the diaphragm cutting adopts a heating wire hot cutting method, and the heating system is an integrated structure.

[0011] As a further description of the above technical solution: the power source for the negative electrode cutting machine and the positive electrode cutting machine is a large-diameter cylinder, which is equipped with a cutting depth adjustment function, and the cutting pressure is adjusted by a precision pressure regulating valve; the lifting guide structure of the negative electrode cutting machine and the positive electrode cutting machine is a linear bearing, and two electrode sheets can be formed in a single cut; the lower template of the negative electrode cutting machine and the positive electrode cutting machine is designed with a vacuum suction cup to fix the electrode sheets and prevent displacement; the left side of the negative electrode cutting machine and the positive electrode cutting machine is equipped with an electrode sheet storage magazine, which can be automatically switched to pick up and cut electrode sheets in real time or electrode sheets in the material box through the whole machine control touch screen; both sides of the positive and negative electrode sheet material boxes are equipped with air blowing functions, which, together with the up and down shaking of the seven-axis robotic arm, prevent excess electrode sheets from being brought out when grabbing electrode sheets.

[0012] As a further description of the above technical solution: the power structure of the stacking machine includes three sets of three-axis cylinders, namely a filling cylinder, a telescopic cylinder, and a lifting cylinder; the filling cylinder is used to fill the clearance caused by material feeding, and extends in the normal state and retracts to avoid clearance during material feeding; the telescopic cylinder is used to drive the pressure knife to be pulled out or retracted from the stacked cells; the lifting cylinder and the telescopic cylinder are linked: when the telescopic cylinder extends to the position, the lifting cylinder rises; when the telescopic cylinder retracts to the position, the lifting cylinder descends and presses down on the product.

[0013] As a further description of the above technical solution: the U-shaped adhesive applicator is equipped with a push-and-buffer cylinder, a servo motor synchronous belt drive mechanism, and a servo synchronous belt module that works in conjunction with a finger cylinder for adhesive applicator structure; wherein, the push-and-buffer cylinder is triggered once for each adhesive applicator action; the tape pulling process is powered by a servo motor driving the synchronous belt, and the tape pulling length can be adjusted autonomously according to the cell size and adhesive applicator requirements to meet the adaptability of different battery specifications; the adhesive applicator finger is controlled by the servo synchronous belt module to control the movement precision, and in conjunction with the gripping and extending actions of the finger cylinder, the tape is accurately applied to the designated position of the cell after stacking, thereby fixing the cell and preventing the cell structure from shifting in subsequent processes.

[0014] As a further description of the above technical solution: the power system of the flat press consists of a servo motor and a reducer, and the power is output to the upper die through an electric cylinder; the guiding structure of the flat press adopts high-precision guide posts and guide sleeves; a pressure sensor is installed at the connection between the upper die and the electric cylinder of the flat press, and the pressure value can be displayed on the corresponding interface of the whole machine control touch screen; the lower die of the flat press is embedded with a lifting probe, and the lower die probe hole is processed with high-precision slow wire EDM to avoid indentation after the battery cell is pressed.

[0015] As a further description of the above technical solution: the ultrasonic welding machine is provided with two units, corresponding to welding the positive and negative electrodes respectively; the ultrasonic welding machine converts the ultrasonic high-power oscillation signal into mechanical energy of the corresponding frequency through a transducer and applies it to the contact surface of the metal sheet to be welded; the ultrasonic welding machine generates heat instantaneously through the contact surface of the metal sheet, causing the metal lattice particles to be activated and achieve molecular interpenetration to complete the welding.

[0016] As a further description of the above technical solution: the tab applicator includes a pusher buffer cylinder, a screw stepper transmission mechanism, and a two-stage cylinder applicator structure. The tape pulling process is driven by the screw stepper mechanism, which can precisely adjust the tape pulling length according to the tab size and the tape protection requirements to ensure that the tape covers the tab welding area. The applicator fingers adopt a two-stage cylinder design. The first stage pick-up cylinder picks up the tape from the roll and sends it to the designated position. The second stage applicator presses the tape firmly onto the front and back sides of the ultrasonic welding point of the battery cell tab, achieving insulation and protection of the tab welding area and avoiding the risk of tab damage or short circuit in subsequent processes.

[0017] As a further description of the above technical solution: the sealing structure of the top-side sealing machine adopts a cylinder-driven output form; the guiding structure of the top-side sealing machine is a linear bearing with a guide shaft; the output of the top-side sealing machine is adjusted by a precision pressure regulating valve, and the parallelism of the sealing head is adjusted by a pull-top type; the heating device of the top-side sealing machine is a heating tube, the temperature adjustment range of the sealing head is room temperature to 260℃, the temperature adjustment accuracy is 0.1℃, and the temperature control accuracy is ±5℃.

[0018] As a further description of the above technical solution: the sealing structure of the vacuum sealing machine adopts a cylinder-driven output form; the guiding structure of the vacuum sealing machine is a linear bearing with a guide shaft; the output of the vacuum sealing machine is adjusted by a precision pressure regulating valve, and the parallelism of the sealing head is adjusted by a pull-top type; the heating device of the vacuum sealing machine is a heating tube, the temperature adjustment range of the sealing head is room temperature to 260℃, the temperature adjustment accuracy is 0.1℃, and the temperature control accuracy is ±5℃.

[0019] As a further description of the above technical solution: the fully automated seven-axis robotic arm consists of a self-built seventh axis and a standard six-axis robotic arm; the production line also includes a fixture storage platform, which houses all the head fixtures required by the seven-axis robotic arm; the seven-axis robotic arm achieves docking and transfer of materials at each workstation by cooperating with the fixtures in the fixture storage platform.

[0020] As a further description of the above technical solution: the bottom of the diaphragm straightening machine, the battery cell straightening machine, and the aluminum-plastic film straightening machine are all equipped with finger cylinders, which can realize the simultaneous straightening of four sides; the diaphragm fixture of the diaphragm straightening machine is equipped with material shortage detection and remaining material detection functions, and during production, it can independently choose to use the diaphragm cut by the diaphragm cutting machine or the diaphragm straightening machine; the aluminum-plastic film of the aluminum-plastic film straightening machine needs to be placed manually in the manner of "pairs of adhesive side facing each other", and the aluminum-plastic film needs to be dehydrated and deoxygenated in the transition box before entering the glove box.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a core production environment is constructed through a fully enclosed inert gas circulating glove box. The accompanying water and oxygen detection module can monitor in real time and automatically activate the gas circulation filtration. Combined with the circulating fan and purifier, the inert gas achieves sealed dehydration and deoxygenation. The dehydration and deoxygenation materials can also be regenerated through a program to always maintain a water-free and oxygen-free state inside the box. At the same time, the pressure of the glove box is automatically controlled by PLC. External materials must pass through a transition box for dehydration and deoxygenation before entering, effectively avoiding contamination by moisture, oxygen, and impurities. This ensures the material stability in the solid-state battery production process from the root, significantly improves the battery's energy density, charging speed, and other core performance characteristics, and reduces battery performance differences caused by environmental fluctuations, thereby improving product consistency.

[0023] 2. In this utility model, by adopting an integrated production line design, the entire process of equipment such as separator cutting, electrode processing, stacking, welding, and packaging is integrated. The material docking and transfer at each station is completed by a self-built fully automatic seven-axis robotic arm, eliminating the need for manual intervention and reducing labor costs and operational errors. At the same time, the equipment design combines high efficiency and flexibility. For example, the separator cutting machine is driven by a servo motor and ball screw, the positive and negative electrode cutting machine cuts two electrodes at a time, and the stacking machine achieves rapid stacking through the linkage of three sets of three-axis cylinders. It can also independently select the source of separators / electrodes. The overall process is simplified and closely connected, which increases production capacity while reducing equipment footprint and energy consumption, thus facilitating the large-scale production of solid-state batteries.

[0024] 3. Among them, each core piece of equipment has been improved in detail to meet the production needs of solid-state batteries. For example, the positive and negative electrode sheets are cut by two independent cutting machines to prevent cross-contamination. The material box is equipped with an air blowing function and a robotic arm to avoid carrying multiple electrode sheets. The flat press uses high-precision guide pillars and sleeves and pressure sensors to ensure pressing accuracy. The lower mold lifting probe is processed by slow wire cutting to avoid cell indentation. The top and side sealing machine and the vacuum sealing machine are driven by cylinders and temperature controlled by heating tubes to ensure packaging quality. At the same time, the whole machine is equipped with a unified control touch screen, which can realize pressure setting, electrode sheet gripping mode switching, equipment status monitoring and other operations. In case of abnormality, it will automatically pause and alarm. This not only ensures the production accuracy of each process, but also reduces the difficulty of operation and makes it easy for staff to quickly get started and maintain. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the solid-state battery manufacturing process and battery manufacturing equipment proposed in this utility model. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the solid-state battery manufacturing process and battery manufacturing equipment proposed in this utility model. Figure 2 .

[0027] Legend:

[0028] 1. Diaphragm cutting machine; 2. Diaphragm straightening machine; 3. Negative electrode sheet cutting machine; 4. Positive electrode sheet cutting machine; 5. Stacking machine; 6. U-shaped adhesive applicator; 7. Flatbed press; 8. Cell straightening machine; 9. Ultrasonic welding machine; 10. Tab adhesive applicator; 11. Aluminum-plastic film straightening machine; 12. Top and side sealing machine; 13. Liquid injection platform; 14. Vacuum sealing machine; 15. Fixture platform; 16. Seven-axis robotic arm; 17. Large feed transition hopper; 18. Small feed transition hopper; 19. Whole machine control touch screen. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Example

[0033] Please see Figures 1-2 As shown, this utility model provides a technical solution: a solid-state battery production process and battery production equipment, including:

[0034] The solid-state battery production process is based on a fully enclosed production environment and an integrated production line. The production environment uses a fully enclosed glove box, which is filled with inert gas. All pneumatic components in the production line are driven by inert gas to avoid product contamination.

[0035] The integrated production line consists of an inert gas circulating glove box, a diaphragm cutting machine 1, a diaphragm straightening machine 2, a negative electrode cutting machine 3, a positive electrode cutting machine 4, positive and negative electrode material boxes, a stacking machine 5, a U-shaped adhesive applicator 6, a flat press 7, a cell straightening machine 8, an ultrasonic welding machine 9, an electrode tab adhesive applicator 10, an aluminum-plastic film straightening machine 11, a top and side sealing machine 12, a liquid injection platform 13, a vacuum sealing machine 14, a fixture platform 15, and a fully automatic seven-axis robotic arm 16.

[0036] Material transfer and workstation docking on the production line are all completed by a fully automatic seven-axis robotic arm 16, and the negative electrode cutting machine and the positive electrode cutting machine are used to cut the positive electrode and the negative electrode respectively to prevent cross-contamination.

[0037] In this embodiment, specifically: the inert gas circulating glove box is equipped with a water and oxygen detection module, which can automatically activate the internal gas circulation and filtration function based on the water and oxygen detection results inside the box; the glove box is also equipped with a large feed transition hopper 17 and a small feed transition hopper 18, and the internal pressure is automatically controlled by the PLC control system, and the pressure parameters can be set on the glove box control touch screen 19; the inert gas inside the glove box is continuously dehydrated and deoxygenated through a closed circulation fan and purifier, and the dehydrated and deoxygenated material can be regenerated through program control; external production materials must be dehydrated and deoxygenated in the transition box before entering the glove box and being transferred to the designated material placement box.

[0038] In this embodiment, specifically: the diaphragm cutting machine 1 uses a stepper motor and an unwinding shaft connected by a synchronous belt to achieve active unwinding of the diaphragm; both the front and back sides of the diaphragm path of the diaphragm cutting machine 1 are equipped with antistatic devices; the diaphragm path is also equipped with a tension control mechanism, which can achieve different tension control by adjusting the cylinder pressure according to the diaphragm width; the material pulling mechanism of the diaphragm cutting machine 1 is driven by a servo motor and a ball screw, with a repeatability of ±0.05mm; the diaphragm cutting adopts a heating wire hot cutting method, and the heating system is an integrated structure.

[0039] In this embodiment, specifically: the power source for the negative electrode cutting machine 3 and the positive electrode cutting machine 4 is a large-diameter cylinder, which is equipped with a cutting depth adjustment function, and the cutting pressure is adjusted by a precision pressure regulating valve; the lifting guide structure of the negative electrode cutting machine 3 and the positive electrode cutting machine 4 is a linear bearing, which can form two electrode sheets in a single cut; the lower template of the negative electrode cutting machine 3 and the positive electrode cutting machine 4 is designed with a vacuum suction cup to fix the electrode sheets and prevent displacement; the left side of the negative electrode cutting machine 3 and the positive electrode cutting machine 4 is equipped with an electrode sheet storage clip, which can be automatically switched to pick up and cut electrode sheets in real time or electrode sheets in the material box through the whole machine control touch screen 19; both sides of the positive and negative electrode material boxes are equipped with air blowing function, which, together with the up and down shaking of the seven-axis robotic arm 16, prevents excess electrode sheets from being brought out when grabbing electrode sheets.

[0040] In this embodiment, specifically: the power structure of the stacking machine 5 includes three sets of three-axis cylinders, namely a filling cylinder, a telescopic cylinder, and a lifting cylinder; the filling cylinder is used to fill the clearance caused by material feeding, it extends in the normal state and retracts to avoid clearance during material feeding; the telescopic cylinder is used to drive the pressure knife to be pulled out or retracted from the stacked cells; the lifting cylinder and the telescopic cylinder are linked: when the telescopic cylinder extends to the position, the lifting cylinder rises; when the telescopic cylinder retracts to the position, the lifting cylinder descends and presses down on the product.

[0041] In this embodiment, specifically: the U-shaped adhesive applicator 6 is equipped with a push-and-buffer cylinder, a servo motor synchronous belt drive mechanism, and a servo synchronous belt module that works in conjunction with the finger cylinder for adhesive application; wherein, the push-and-buffer cylinder is triggered once after each adhesive application action; the tape pulling process is powered by the servo motor driving the synchronous belt, and the tape pulling length can be adjusted autonomously according to the cell size and adhesive application requirements to meet the adaptability of different battery specifications; the adhesive application fingers are controlled by the servo synchronous belt module to control the movement precision, and in conjunction with the gripping and extending actions of the finger cylinder, the tape is accurately applied to the designated position of the cell after the stacking is completed, thereby fixing the cell and preventing the cell structure from shifting in subsequent processes.

[0042] In this embodiment, specifically: the power system of the flat press 7 consists of a servo motor and a reducer, and the power is output to the upper die through the electric cylinder; the guide structure of the flat press 7 adopts high-precision guide pillars and guide sleeves; a pressure sensor is installed at the connection between the upper die and the electric cylinder of the flat press 7, and the pressure value can be displayed on the corresponding interface of the whole machine control touch screen 19; the lower die of the flat press 7 is inlaid with a lifting probe, and the lower die probe hole is processed with high-precision slow wire EDM to avoid indentation after the battery cell is pressed.

[0043] In this embodiment, specifically: two ultrasonic welding machines 9 are provided, corresponding to welding the positive and negative electrodes respectively; the ultrasonic welding machine 9 converts the ultrasonic high-power oscillation signal into mechanical energy of the corresponding frequency through the transducer and applies it to the contact surface of the metal sheet to be welded; the ultrasonic welding machine 9 generates heat instantaneously through the contact surface of the metal sheet, causing the metal lattice particles to be activated and achieve molecular interpenetration to complete the welding.

[0044] In this embodiment, specifically: the tab applicator 10 includes a push-and-buffer cylinder, a lead screw stepper transmission mechanism, and a two-stage cylinder applicator structure. The tape pulling process is driven by the lead screw stepper mechanism, which can precisely adjust the tape pulling length according to the tab size and the applicator protection requirements to ensure that the tape covers the tab welding area. The applicator fingers adopt a two-stage cylinder design. The first stage pick-up cylinder picks up the tape from the roll and sends it to the designated position. The second stage applicator rod presses the tape firmly onto the front and back sides of the ultrasonic welding area of ​​the battery cell tab, achieving insulation and protection of the tab welding area and avoiding the risk of tab damage or short circuit in subsequent processes.

[0045] In this embodiment, specifically: the top-side sealing machine 12 adopts a cylinder-driven output structure for its sealing structure; the top-side sealing machine 12's guiding structure is a linear bearing with a guide shaft; the output of the top-side sealing machine 12 is adjusted by a precision pressure regulating valve, and the parallelism of the sealing head is adjusted by a pull-top type; the heating device of the top-side sealing machine 12 is a heating tube, the sealing head temperature adjustment range is room temperature to 260℃, the temperature adjustment accuracy is 0.1℃, and the temperature control accuracy is ±5℃.

[0046] It should be noted that the robotic arm grips the product and moves it to the designated position, and the end cap cylinder drives the product to seal the edges.

[0047] In this embodiment, specifically: the sealing structure of the vacuum sealing machine 14 adopts a cylinder-driven output form; the guiding structure of the vacuum sealing machine 14 is a linear bearing with a guide shaft; the output of the vacuum sealing machine 14 is adjusted by a precision pressure regulating valve, and the parallelism of the sealing head is adjusted by a pull-top type; the heating device of the vacuum sealing machine 14 is a heating tube, the temperature adjustment range of the sealing head is room temperature to 260℃, the temperature adjustment accuracy is 0.1℃, and the temperature control accuracy is ±5℃.

[0048] It should be noted that after the product is placed in place, the cylinder drives the product to move into position and closes the cavity door, starts vacuuming, and when the pressure reaches the set value, the end cap cylinder drives the product to seal the edges.

[0049] In this embodiment, specifically: the fully automatic seven-axis robotic arm 16 is composed of a self-built seventh axis and a standard six-axis robotic arm; the production line also includes a fixture storage platform, which contains all the head fixtures required by the seven-axis robotic arm 16; the seven-axis robotic arm 16 achieves docking and transfer of materials at each workstation by cooperating with the fixtures in the fixture storage platform.

[0050] In this embodiment, specifically: the bottom of the diaphragm straightening machine 2, the battery cell straightening machine 8, and the aluminum-plastic film straightening machine 11 are all equipped with finger cylinders, which can realize the simultaneous straightening of four sides; the diaphragm fixture of the diaphragm straightening machine 2 is equipped with material shortage detection and remaining material detection functions, and during production, it can choose to use the diaphragm cut by the diaphragm cutting machine 1 or the diaphragm straightened by the diaphragm straightening machine 2; the aluminum-plastic film of the aluminum-plastic film straightening machine 11 needs to be placed manually in the manner of "pairs of adhesive side facing each other", and the aluminum-plastic film needs to be dehydrated and deoxygenated in the transition box before entering the glove box.

[0051] Working principle: First, external production materials (such as diaphragms, positive and negative electrode sheets, and aluminum-plastic film) are placed into the large and small feed transition hoppers of the inert gas circulating glove box. The transition hoppers are first evacuated and then filled with inert gas to complete the dehydration and deoxygenation. After that, the materials enter the glove box.

[0052] Next, the diaphragm processing is divided into two methods. One is that the diaphragm cutting machine 1 drives the unwinding shaft to unwind the diaphragm through a stepper motor. After static elimination and tension control, the servo motor and ball screw pull the material to the specified length, and then the heating wire is used for hot cutting. The other is that the diaphragm straightening machine 2 straightens the four sides of the pre-cut diaphragm through the bottom finger cylinder. The operator can choose the source of the diaphragm independently.

[0053] The positive and negative electrode sheets are processed by the negative electrode sheet cutting machine 3 and the positive electrode sheet cutting machine 4 respectively. The large-diameter cylinder provides power. After the cutting depth is adjusted, the pressure is adjusted, and the vacuum suction cup is fixed, two electrode sheets are cut at a time. The electrode sheets can be temporarily stored in the clip or directly grabbed. The material box is blown with the mechanical arm to prevent multiple electrode sheets from being carried. The positive and negative electrode sheet material box aligns the pre-cut electrode sheets outside.

[0054] Subsequently, the seven-axis robotic arm 16 (composed of a self-built seventh-axis and a standard six-axis robotic arm, which can be replaced with the corresponding fixture from the fixture storage platform) transports the processed separator and positive and negative electrode sheets to the stacking machine 5. The stacking machine 5 uses the linkage of the filling cylinder, the telescopic cylinder, and the lifting cylinder to cross-stack the battery cells in the order of "separator-positive electrode sheet-separator-negative electrode sheet". After stacking, the robotic arm sends the cells to the U-shaped adhesive applicator 6. The pushing buffer cylinder works with the servo motor to pull the adhesive and the finger cylinder to apply the adhesive to fix the battery cells.

[0055] After being fixed, the battery cell is sent to the flat press 7. The servo motor drives the electric cylinder to lower the upper mold. High-precision guide pillars and guide sleeves ensure parallelism. Pressure sensors monitor the pressure. The lower mold lifting probe avoids indentation. After flat pressing, the battery cell is aligned by the finger cylinder at the bottom of the battery cell alignment machine 8.

[0056] After correction, the battery cells are sent to two independent ultrasonic welding machines 9. The transducer converts the oscillation signal into mechanical energy and applies it to the contact surface of the electrode tabs. Instant heat generation achieves molecular penetration welding. After welding, the electrode tabs are protected by the electrode tab adhesive applicator 10 through a pusher buffer cylinder, a lead screw stepping adhesive puller, and a two-stage cylinder adhesive applicator.

[0057] After the aluminum-plastic film is dehydrated and deoxygenated in the transition hopper, it is manually placed into the aluminum-plastic film straightening machine 11 with the adhesive side facing each other. The bottom finger cylinder straightens the film, and the robotic arm puts the battery cell into the straightened aluminum-plastic film and sends it to the top side sealing machine 12. The cylinder drives the sealing head, and the heating tube controls the temperature (room temperature ~ 260℃, adjustment accuracy 0.1℃, control accuracy ±5℃) to complete the top side heat sealing.

[0058] After sealing, the battery cells are sent to the liquid injection platform 13. The platform can store four batteries to be injected and detect their positions. After the liquid injection is completed manually, the robotic arm sends them to the vacuum sealing machine 14. First, a vacuum is drawn, and then the tail is heat-sealed according to the same structure as the top and side sealing machine 12, thus completing the solid-state battery production. Throughout the process, the glove box maintains a water-free and oxygen-free environment through gas circulation purification and water and oxygen detection and control. The status of each device is fed back to the whole machine control touch screen 19 through the PLC system. In case of abnormality, the system will automatically pause and alarm.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Solid-state battery manufacturing process and battery manufacturing equipment, characterized in that: include: The solid-state battery production process is based on a fully enclosed production environment and an integrated production line. The production environment uses a fully enclosed glove box, which is filled with inert gas. All pneumatic components in the production line are driven by inert gas to avoid product contamination. The integrated production line consists of an inert gas circulating glove box, a diaphragm cutting machine (1), a diaphragm straightening machine (2), a negative electrode cutting machine (3), a positive electrode cutting machine (4), a positive and negative electrode material box, a stacking machine (5), a U-shaped adhesive applicator (6), a flat press (7), a cell straightening machine (8), an ultrasonic welding machine (9), an electrode tab adhesive applicator (10), an aluminum-plastic film straightening machine (11), a top and side sealing machine (12), a liquid injection platform (13), a vacuum sealing machine (14), a fixture platform (15), and a fully automatic seven-axis robotic arm (16). Material transfer and workstation docking of the production line are completed by the fully automatic seven-axis robotic arm (16), and the negative electrode cutting machine (3) and the positive electrode cutting machine (4) are used to cut the positive electrode and the negative electrode respectively to prevent cross-contamination.

2. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The inert gas circulating glove box is equipped with a water and oxygen detection module, which can automatically activate the internal gas circulation filtration function according to the water and oxygen detection results inside the box. The glove box is also equipped with a large feed transition hopper (17) and a small feed transition hopper (18), and the internal pressure is automatically controlled by the PLC control system. The pressure parameters can be set on the glove box control touch screen (19). The inert gas inside the glove box is continuously dehydrated and deoxygenated through a closed circulation fan and purifier. The dehydrated and deoxygenated material can be regenerated through program control. External production materials need to be dehydrated and deoxygenated in the transition box before entering the glove box and being transferred to the designated material placement box.

3. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The diaphragm cutting machine (1) uses a stepper motor and an unwinding shaft connected by a synchronous belt to achieve active unwinding of the diaphragm; the diaphragm path of the diaphragm cutting machine (1) is equipped with an antistatic device on both the front and back sides; the diaphragm path is also equipped with a tension control mechanism, which can achieve different tension control by adjusting the cylinder pressure according to the diaphragm width; the material pulling mechanism of the diaphragm cutting machine (1) is driven by a servo motor and a ball screw, with a repeatability of ±0.05mm; the diaphragm cutting adopts a heating wire hot cutting method, and the heating system is an integrated structure.

4. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The negative electrode cutting machine (3) and the positive electrode cutting machine (4) are powered by large-diameter cylinders. The large-diameter cylinders are equipped with a cutting depth adjustment function, and the cutting pressure is adjusted by a precision pressure regulating valve. The lifting guide structure of the negative electrode cutting machine (3) and the positive electrode cutting machine (4) is a linear bearing, and two electrode sheets can be formed in a single cut. The lower template of the negative electrode cutting machine (3) and the positive electrode cutting machine (4) is designed with a vacuum suction cup to fix the electrode sheets and prevent them from shifting. The left side of the negative electrode cutting machine (3) and the positive electrode cutting machine (4) is equipped with an electrode sheet storage clip, which can be switched independently by the whole machine control touch screen (19) to pick up and cut electrode sheets in real time or electrode sheets in the material box. Both sides of the positive and negative electrode material boxes are equipped with an air blowing function, which, together with the up and down shaking of the seven-axis robotic arm (16), prevents excess electrode sheets from being pulled out when grabbing the electrode sheets.

5. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The power structure of the stacking machine (5) includes three sets of three-axis cylinders, namely a filling cylinder, a telescopic cylinder and a lifting cylinder; the filling cylinder is used to fill the clearance caused by material feeding, and extends in the normal state and retracts to avoid clearance during material feeding; the telescopic cylinder is used to drive the pressure knife to be pulled out or retracted from the stacked cells; the lifting cylinder and the telescopic cylinder are linked: when the telescopic cylinder extends to the position, the lifting cylinder rises; when the telescopic cylinder retracts to the position, the lifting cylinder descends and presses down on the product.

6. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The U-shaped adhesive applicator (6) is equipped with a push-and-buffer cylinder, a servo motor synchronous belt drive mechanism, and a servo synchronous belt module that works in conjunction with a finger cylinder for adhesive application. The push-and-buffer cylinder is triggered once for each adhesive application action. The tape pulling process is powered by a servo motor-driven synchronous belt, which can adjust the tape pulling length according to the cell size and adhesive application requirements to meet the adaptability of different battery specifications. The adhesive application fingers are controlled by the servo synchronous belt module to control the movement accuracy. In conjunction with the gripping and extending actions of the finger cylinder, the tape is accurately applied to the designated position of the cell after stacking, thereby fixing the cell and preventing the cell structure from shifting in subsequent processes.

7. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The power system of the flat press (7) consists of a servo motor and a reducer, and the power is output to the upper die through the electric cylinder; the guide structure of the flat press (7) adopts high-precision guide pillars and guide sleeves; a pressure sensor is installed at the connection between the upper die and the electric cylinder of the flat press (7), and the pressure value can be displayed on the corresponding interface of the whole machine control touch screen (19); the lower die of the flat press (7) is inlaid with a lifting probe, and the lower die probe is perforated with high-precision slow wire cutting to avoid indentation after the battery cell is pressed.

8. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The ultrasonic welding machine (9) is provided in two units, which are respectively used to weld the positive electrode and the negative electrode. The ultrasonic welding machine (9) converts the ultrasonic high-power oscillation signal into mechanical energy of the corresponding frequency through the transducer and applies it to the contact surface of the metal sheet to be welded. The ultrasonic welding machine (9) generates heat instantaneously through the contact surface of the metal sheet, which activates the metal lattice particles and realizes molecular interpenetration to complete the welding.

9. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 6, characterized in that: The tab applicator (10) includes a push-and-buffer cylinder, a screw-stepping transmission mechanism, and a two-stage cylinder applicator structure. The tape pulling process is driven by the screw-stepping mechanism, which can precisely adjust the tape pulling length according to the tab size and the tape protection requirements to ensure that the tape covers the tab welding area. The applicator fingers adopt a two-stage cylinder design. The first stage pick-up cylinder picks up the tape from the roll and sends it to the designated position. The second stage applicator presses the tape firmly onto the front and back sides of the ultrasonic welding point of the battery cell tab, achieving insulation and protection of the tab welding area and avoiding the risk of tab damage or short circuit in subsequent processes.

10. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The top-side sealing machine (12) adopts a cylinder-driven output structure for its sealing structure; the top-side sealing machine (12) uses a linear bearing with a guide shaft for its guiding structure; the output of the top-side sealing machine (12) is adjusted by a precision pressure regulating valve, and the parallelism of the sealing head is adjusted by a pull-top type; the heating device of the top-side sealing machine (12) is a heating tube, the temperature adjustment range of the sealing head is room temperature to 260℃, the temperature adjustment accuracy is 0.1℃, and the temperature control accuracy is ±5℃.

11. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The vacuum sealing machine (14) adopts a cylinder-driven output structure for its sealing structure; the vacuum sealing machine (14) uses a linear bearing with a guide shaft for its guiding structure; the output of the vacuum sealing machine (14) is adjusted by a precision pressure regulating valve, and the parallelism of the sealing head is adjusted by a pull-top type; the heating device of the vacuum sealing machine (14) is a heating tube, the temperature adjustment range of the sealing head is room temperature to 260℃, the temperature adjustment accuracy is 0.1℃, and the temperature control accuracy is ±5℃.

12. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The fully automatic seven-axis robotic arm (16) consists of a self-built seventh axis and a standard six-axis robotic arm; the production line also includes a fixture storage platform, which contains all the head fixtures required by the seven-axis robotic arm (16); the seven-axis robotic arm (16) achieves docking and transfer of materials at each workstation by cooperating with the fixtures in the fixture storage platform.

13. The solid-state battery manufacturing process and battery manufacturing equipment according to claim 1, characterized in that: The bottom of the diaphragm straightening machine (2), the battery cell straightening machine (8), and the aluminum-plastic film straightening machine (11) are all equipped with finger cylinders, which can achieve simultaneous straightening of four sides; the diaphragm fixture of the diaphragm straightening machine (2) is equipped with a material shortage detection and a remaining material detection function, and during production, the diaphragm can be selected to be cut by the diaphragm cutting machine (1) or straightened by the diaphragm straightening machine (2); the aluminum-plastic film of the aluminum-plastic film straightening machine (11) needs to be placed manually in the manner of "pairs of adhesive side facing each other", and the aluminum-plastic film needs to be dehydrated and deoxygenated in the transition box before entering the glove box.

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