Button battery assembly equipment and assembly method thereof

Abstract

The invention discloses button cell assembling equipment which comprises a main body and a vacuum assembly, and the vacuum assembly comprises a sealed cabin connected by an electric telescopic rod; and a honeycomb-shaped micro-channel manifold communicated with the sealed cabin is mounted on the sealed cabin. According to the button cell assembly equipment and the assembly method thereof disclosed by the embodiment of the invention, the honeycomb micro-channel manifold design is combined with a dynamic vacuum pressure regulation and control technology, and the piezoelectric micro-valves are used for regulating the opening size of the channels in real time, constructing a gradient vacuum field and accurately controlling the permeation path and speed of electrolyte in electrode pores; the industrial problems of uneven permeation, micropore bubble residues and the like caused by a traditional uniform vacuum process are effectively solved, so that the electrolyte filling uniformity and the bubble removal efficiency are remarkably improved, meanwhile, the vacuum treatment time is shortened, the electrolyte utilization rate is increased, the electrochemical performance of the battery is greatly optimized, and the production cost is reduced. And a reliable technical path is provided for large-scale high-efficiency manufacturing of the high-energy-density button cell.

Description

Technical Field

[0001] The present application relates to the technical field of battery assembly, and in particular to a button battery assembly device and an assembly method thereof. Background Art

[0002] In the manufacturing process of button batteries, electrolyte filling is a crucial step, which directly affects the electrochemical performance, stability and life of the battery.

[0003] However, traditional electrolyte filling methods generally have some technical and process challenges, which limit the large-scale and efficient production of high-energy-density button batteries. For example, when the electrolyte enters the micropores of the electrode material, air is often trapped in these micropores to form bubbles, which not only hinders the effective filling of the electrolyte, but may also cause local areas to be unable to fully contact the electrolyte, thereby affecting the battery's charge and discharge efficiency and cycle life. In order to ensure that the electrolyte can penetrate into the electrode material as much as possible and minimize the presence of bubbles, the traditional process usually requires a long vacuum treatment time, which constitutes a significant bottleneck for production efficiency. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, one purpose of the present application is to provide a button battery assembly device, which uses a piezoelectric microvalve to flexibly adjust the flow channel opening size according to actual needs, construct a gradient vacuum field, and enable the electrolyte to penetrate into the electrode pores under optimal conditions, further improving the filling effect and bubble removal efficiency.

[0006] To achieve the above-mentioned objectives, the first embodiment of the present application proposes a button battery assembly device, including a main body and a vacuum component, wherein the vacuum component includes a sealed cabin connected by an electric telescopic rod; a honeycomb microfluidic manifold connected to the sealed cabin is installed on the sealed cabin, and the honeycomb microfluidic manifold is a circular array; an interconnecting shell is installed on the top of the honeycomb microfluidic manifold; a vacuum pump is installed on the interconnecting shell; the microchannels in the honeycomb microfluidic manifold are all connected to electric microvalves; and a plurality of pressure sensors are installed at the bottom of the honeycomb microfluidic manifold.

[0007] In addition, the button battery assembly equipment proposed in the present application may also have the following additional technical features:

[0008] In one embodiment of the present application, the material of the honeycomb microchannel manifold is L stainless steel or nano-ceramic coated aluminum-based composite material.

[0009] In one embodiment of the present application, the pressure sensor scans the vacuum distribution, generates a three-dimensional pressure cloud map using the vacuum distribution data, and uses Calculate local pressure gradients in real time.

[0010] In one embodiment of the present application, each flow channel outlet in the honeycomb-shaped micro-channel manifold corresponds to a corresponding area on the surface of the battery casing.

[0011] In one embodiment of the present application, the honeycomb microfluidic manifolds are distributed in a honeycomb hexagonal array.

[0012] In one embodiment of the present application, the inlet of the flow channel in the honeycomb micro-channel manifold is chamfered at forty-five degrees.

[0013] In one embodiment of the present application, an injection inner needle is provided in the sealed cabin, an air supply cylinder is slidably provided on the surface of the injection inner needle, and a blocking groove is provided on the air supply cylinder.

[0014] In one embodiment of the present application, a spiral plate is installed in the blocking groove, and the spiral plate is used to guide the airflow to form a vortex.

[0015] In one embodiment of the present application, a fixing plate is installed in the air supply cylinder through a connecting rod, an air bag is installed on the fixing plate, the air bag is connected to an air pressure sensor, and an adjustment ring is installed at one end of the injection needle.

[0016] A method for assembling a button battery assembly device comprises the following steps:

[0017] Step 1: First, place the button battery to be assembled in a sealed chamber, and then use a honeycomb microfluidic manifold to vacuum it;

[0018] Step 2: Use the corresponding pressure sensor to monitor the pressure in the local area in real time. If the vacuum degree in the local area deviates from the set value, the opening of the corresponding micro valve is controlled to adjust the local vacuum degree;

[0019] Step 3: When vacuuming, use the injection needle on the sealed cabin to inject liquid;

[0020] Step 4: While injecting liquid, use the spiral plate inside the air supply cylinder on the sealed cabin to make the gas discharged from the barrier groove form an air curtain isolation layer to build a zero-power anti-splash barrier.

[0021] The button battery assembly equipment of the embodiment of the present application adopts a honeycomb microchannel manifold design combined with dynamic vacuum pressure control technology, uses piezoelectric microvalves to adjust the channel opening size in real time, constructs a gradient vacuum field, and accurately controls the penetration path and speed of the electrolyte in the electrode pores, effectively solving industry problems such as uneven penetration and residual micropore bubbles caused by traditional uniform vacuum processes, thereby significantly improving the electrolyte filling uniformity and bubble removal efficiency, while shortening the vacuum processing time, improving the electrolyte utilization rate, and greatly optimizing the battery electrochemical performance, providing a reliable technical path for large-scale and efficient manufacturing of high-energy-density button batteries.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 Schematic diagram of a button battery assembly device and an assembly method thereof according to one embodiment of the present application;

[0025] Figure 2 is a perspective view of a vacuum assembly according to one embodiment of the present application;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 is a perspective view of a honeycomb microfluidic manifold according to another embodiment of the present application;

[0028] Figure 5 is a perspective view of an air supply cylinder according to one embodiment of the present application;

[0029] Figure 6 It is a side view of an air supply cylinder according to one embodiment of the present application.

[0030] As shown in the figure: 1. Main body; 2. Vacuum assembly; 21. Sealed cabin; 22. Honeycomb microfluidic manifold; 23. Interconnect shell; 24. Vacuum pump; 25. Electric microvalve; 26. Pressure sensor; 3. Injection needle; 4. Air supply cylinder; 5. Barrier groove; 6. Fixing plate; 7. Air bag; 8. Adjustment ring. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] The following describes the button battery assembly device and assembly method of the embodiment of the present application in conjunction with the accompanying drawings.

[0033] Example 1:

[0034] like Figure 1-Figure 3 As shown, the button battery assembly equipment of an embodiment of the present application includes a main body 1 and a vacuum component 2, wherein the vacuum component 2 includes a sealed cabin 21 connected by an electric telescopic rod 11.

[0035] It should be noted that in order to improve the sealing between the sealed cabin 21 and the main body 1, a sealing ring is installed at the bottom of the sealed cabin 21, so that when the electric telescopic rod 11 drives the sealed cabin 21 to move downward and contact the main body 1, the sealing between the sealed cabin 21 and the main body 1 can be improved.

[0036] A honeycomb microfluidic manifold 22 connected to the sealed cabin 21 is installed on the sealed cabin 21, and the honeycomb microfluidic manifold 22 is a circular array; an interconnection shell 23 is installed on the top of the honeycomb microfluidic manifold 22; a vacuum pump 24 is installed on the interconnection shell 23; the microchannels in the honeycomb microfluidic manifold 22 are all connected to electric microvalves 25; and a plurality of pressure sensors 26 are installed at the bottom of the honeycomb microfluidic manifold 22.

[0037] Specifically, in the actual assembly process, the button battery to be assembled is moved to the bottom of the sealed cabin 21 through the main body 1, and then the output end of the electric telescopic rod 11 is controlled to move downward through the control switch. The downward movement of the output end of the electric telescopic rod 11 will drive the sealed cabin 21 to contact the main body 1. At this time, the sealed cabin 21 wraps the button battery in the sealed cabin 21, and then the vacuum pump 24 is controlled to run, so that the vacuum pump 24 vacuums the sealed cabin 21 through the interconnected shell 23 and the honeycomb microchannel manifold 22. While vacuuming, multiple pressure sensors are used to scan the vacuum distribution at a frequency of 1kHz to generate a three-dimensional pressure cloud map. The local pressure difference is calculated through the cloud map, and then the opening of the electric microvalve 25 is adjusted to adjust the vacuum pressure in the local area.

[0038] By adopting a honeycomb microchannel manifold design combined with dynamic vacuum pressure control technology, using piezoelectric microvalves to adjust the channel opening size in real time, constructing a gradient vacuum field, and precisely controlling the electrolyte penetration path and speed in the electrode pores, it effectively solves industry problems such as uneven penetration and microporous bubble residue caused by traditional uniform vacuum processes, thereby significantly improving the electrolyte filling uniformity and bubble removal efficiency. At the same time, it shortens the vacuum processing time, improves the electrolyte utilization rate, and greatly optimizes the battery electrochemical performance, providing a reliable technical path for large-scale and efficient manufacturing of high-energy-density button batteries.

[0039] In one embodiment of the present application, as shown in FIG2 , the material of the honeycomb micro-channel manifold 22 is 316L stainless steel or nano-ceramic-coated aluminum-based composite material.

[0040] It should be noted that button batteries are composed of a shell, a cover, a core and an electrolyte. The core mainly includes a positive electrode sheet, a negative electrode sheet and a separator. Both the positive electrode sheet and the negative electrode sheet are composed of a metal substrate and an active substance. The active substance is added with deionized water, a conductive agent, a gel and other materials to form a slurry. The slurry is applied to the substrate by a coating machine and then rolled into sheets.

[0041] This technology mainly adopts a three-in-one process, which means that the positive electrode sheet, negative electrode sheet and separator are made into a unified whole by gluing. In order to comply with the basic structural requirement that the positive electrode sheet is smaller than the negative electrode sheet and separator, the required electrode sheet and separator shape are obtained by laser cutting or punching to achieve the technical effect of maximizing the unit volume capacity of the button battery. Specifically, there are two ways to implement it. One is to combine the single-sided powdered negative electrode sheet and separator and the double-sided powdered positive electrode sheet into a pole core. This method is suitable for button batteries with a diameter greater than 10 mm; the other is to combine the single-sided powdered negative electrode sheet and separator with the single-sided powdered positive electrode sheet into a pole core. This method is suitable for button batteries with a diameter of less than 10 mm.

[0042] The main processes and process flow of the first implementation method:

[0043] 1. Negative electrode sheet base film: The metal copper foil surface of the negative electrode sheet roll and the adhesive base film of approximately the same size (thickness 0.05-0.1mm) are integrated into one through the reeling and unreeling device;

[0044] 2. Punching the negative electrode sheet: Use a film cutting machine and a knife to punch the negative electrode sheet into the designed shape and then rewind it after waste treatment;

[0045] 3. Punching the positive electrode sheet: Punching the positive electrode sheet into the designed shape through a punch press and a mold for standby use;

[0046] 4. Glue the negative electrode sheet and adhere the separator: Use a micro-concave glue coating machine to apply glue on the surface of the negative electrode active material, then adhere it to the separator, dry it in a constant temperature oven, and then roll it up;

[0047] 5. Laser cutting of diaphragm: Use a laser machine to cut the required diaphragm shape and remove the two-in-one combination of negative electrode sheet and diaphragm;

[0048] 6. Bonding the positive electrode sheet: Apply glue to the surface of the above-mentioned combined diaphragm and bond the positive electrode sheet to form a three-in-one combination;

[0049] 7. Folding the pole core: Fold the pole core in half and then in a Z shape and tie it with adhesive tape for later use;

[0050] 8. Spot welding the tabs: Use a spot welding machine and connecting pieces to electrically connect the aluminum foil and copper foil leading out of the positive and negative tabs to the shell and cover respectively;

[0051] 9. Liquid injection and packaging: Use vacuum immersion to inject electrolyte and seal with a sealing machine. 10. Formation and volume separation.

[0052] The main processes and process flow of the second implementation method:

[0053] 1. Apply glue to the negative electrode sheet and adhere the separator; 2. Punch the negative electrode sheet; the negative electrode and the separator have the same external dimensions; 3. Punch the positive electrode sheet; 4. Combine the three-in-one; 5. Fold the electrode core; 6. Spot weld the negative electrode connector; 7. Make the positive electrode adhesive and connector assembly; 8. Buckle the shell; 9. Fill the liquid and package; 10. Formation and capacity separation.

[0054] In one embodiment of the present application, as shown in Figure 3, the pressure sensor scans the vacuum distribution, generates a three-dimensional pressure cloud map using the vacuum distribution data, and uses Calculate local pressure gradients in real time.

[0055] In one embodiment of the present application, Figure 2 and Figure 3 As shown, each flow channel outlet in the honeycomb micro-channel manifold 22 corresponds to a corresponding area on the surface of the battery shell.

[0056] Example 2:

[0057] In one embodiment of the present application, Figure 4 As shown, the honeycomb micro-channel manifold 22 is distributed in a honeycomb hexagonal array.

[0058] It should be noted that the design of the honeycomb flow channel array affects the distribution of the fluid during vacuum extraction. The regular hexagonal structure can distribute the airflow more evenly, reduce turbulence and pressure gradients, and control the opening of the piezoelectric microvalve to adjust the vacuum degree of the local area. For example, when the vacuum degree of a certain area is lower than the set value, the opening of the corresponding microvalve increases, and the pumping rate is increased to restore the vacuum degree of the area to balance. Each microvalve corresponds to a microchannel and can respond quickly to pressure changes. When the sensor detects that the vacuum degree of a certain area is insufficient, the control system sends a signal to the corresponding piezoelectric microvalve to adjust its opening, thereby changing the pumping volume of the area. This dynamic adjustment ensures that the vacuum degree in the entire cavity remains uniform.

[0059] For example, the edge of the positive electrode sheet has an abnormal penetration rate due to a sudden change in porosity (from 30% to 35%);

[0060] 1. The sensor detected that the vacuum level in edge area B increased abnormally to -93.5kPa (target -95kPa);

[0061] 2. The control algorithm calculates that the pumping speed needs to be increased by 12%, corresponding to the microvalve opening from 60% to 73%;

[0062] 3. After 0.15 seconds, the vacuum degree in area B returns to -94.8 kPa, and the pressure difference with the central area changes from 1.5 kPa to 0.2 kPa;

[0063] 4. The electrolyte penetrates under the corrected uniform flow field, and the edge pore filling rate increases from 82% to 94%.

[0064] At the same time, under extreme conditions, the instantaneous pumping speed can be increased by fully opening the micro valve.

[0065] The pressure sensor array in the vacuum chamber structure is responsible for real-time monitoring of the pressure at each point and providing feedback data. Combined with the model optimized by CFD simulation, it can predict and adjust the state of each microvalve to maintain a uniform flow field.

[0066] In one embodiment of the present application, Figure 2 As shown, the inlet of the flow channel in the honeycomb micro-channel manifold 22 is chamfered at 45 degrees.

[0067] The flow channel network formed by the hexagonal units can offset the pressure loss caused by the path growth of the edge flow channel, reduce the pressure difference between the center and the edge, and combine with the 45° chamfer design of the flow channel inlet to reduce the flow resistance coefficient, thereby reducing the electrolyte filling defect rate, while increasing the vacuum establishment speed, increasing the assembly speed, and enhancing the honeycomb structure's anti-deformation ability.

[0068] Example 3:

[0069] In one embodiment of the present application, Figure 5As shown, an injection inner needle 3 is provided in the sealed cabin 21 , an air supply cylinder 4 is slidably provided on the surface of the injection inner needle 3 , and a blocking groove 5 is provided on the air supply cylinder 4 .

[0070] It should be noted that during vacuuming, the vacuum pump continuously exhausts gas. If the pressure at the exhaust end is high, it may be used as the gas source for the air curtain. At this time, although it appears that one side is pumping air while the other side is taking in air, the nitrogen flow rate may be very small, and the vacuum pump's exhaust capacity is large enough to maintain the required vacuum level as a whole. In addition, the air curtain's airflow is outward, which may form a protective layer to prevent liquid splashing into the pipeline. Vacuuming is performed at another location, such as the center or edge manifold group. The two are spatially separated, so the air curtain's airflow will not directly interfere with the vacuumed area.

[0071] In one embodiment of the present application, Figure 5 As shown, a spiral plate is installed in the blocking groove 5, and the spiral plate is used to guide the airflow to form a swirl.

[0072] It should be noted that the spiral angle of the spiral plate is 39 degrees to 47 degrees, the blocking groove 5 provides a flow channel for the airflow, and the design of the spiral plate enables the incoming airflow to form a vortex in the air gap ring.

[0073] It should be noted that the airflow of the air curtain is outward, which may form a protective layer to prevent liquid splashing into the pipeline, while vacuuming is carried out at another location, such as the manifold group in the center or edge. The two are spatially separated, so the airflow of the air curtain will not directly interfere with the vacuuming area. At the same time, there is a pressure difference of 40-60kPa between the air curtain area and the suction area, ensuring that the gas flows spontaneously from the high-pressure area (air curtain) to the low-pressure area (suction port) rather than reverse penetration.

[0074] It should be noted that after the nitrogen ejected by the air curtain completes the isolation of the liquid, it is sucked away by the vacuum pump and recovered through the cold trap, and then re-compressed into the gas storage tank to achieve zero gas consumption.

[0075] During vacuuming, the electrolyte needs to be injected into the button cell through the inner injection needle 3. However, when the electrolyte is injected, splashing at the edge causes the microchannel to be blocked, and the microchannel needs to be cleaned regularly.

[0076] Nitrogen is sprayed through the annular air gap to form an air curtain around the needle. The air curtain is used to block the liquid during injection, reducing the splashing of the liquid, thereby protecting the flow channel and avoiding the blockage of the flow channel caused by liquid splashing, which is difficult to clean and affects the normal operation of the flow channel.

[0077] Example 4:

[0078] In one embodiment of the present application, Figure 6As shown, a fixing plate 6 is installed in the air supply cylinder 4 through a connecting rod, an air bag 7 is installed on the fixing plate 6, and the air bag 7 is connected to an air pressure sensor. An adjusting ring 8 is installed at one end of the injection needle 3.

[0079] It should be noted that the inner injection needle 3 can be moved in the air supply cylinder 4 according to the needs of use, and can be positioned by a positioning pin or a screw after the movement.

[0080] Specifically, when adding electrolyte, the viscosity of the electrolyte is affected by factors such as raw materials, temperature, and humidity, so the air curtain may not be able to adapt to all situations.

[0081] During injection, when the fluid flows through the airbag 7, the viscous resistance will exert force on the surface of the airbag 7, causing the airbag 7 to deform. High-viscosity fluid will generate greater force, causing the airbag 7 to deform more significantly. The viscosity of the electrolyte can be judged in conjunction with the air pressure sensor. After the judgment, the injection needle 3 is moved to make the injection needle 3 drive the adjustment ring 8 to move, and then the air curtain can be adjusted according to the viscosity of the electrolyte.

[0082] It should be noted that there are two forms of air curtains. In low viscosity mode (<30mPa·s), the air curtain diffusion angle is 28 degrees to 32 degrees, and the air curtain forms an umbrella-shaped protective layer. In high viscosity mode (>80mPa·s), the air curtain diffusion angle is 3 degrees to 7 degrees, and the air curtain forms a columnar air wall protection.

[0083] A method for assembling a button battery assembly device comprises the following steps:

[0084] Step 1: First, place the button battery to be assembled in the sealed cabin 21, and then use the honeycomb microchannel manifold 22 to vacuum it;

[0085] Step 2: Monitor the pressure in the local area in real time through the corresponding pressure sensor 26. If the vacuum degree in the local area deviates from the set value, the opening of the corresponding micro valve is controlled to adjust the local vacuum degree;

[0086] Step 3: When vacuuming, use the injection needle 3 on the sealed cabin 21 to inject liquid;

[0087] Step 4: While injecting liquid, use the spiral plate inside the air supply cylinder 4 on the sealed cabin 21 to make the gas discharged from the barrier groove 5 form an air curtain isolation layer to build a zero-power anti-splash barrier.

[0088] In summary, the button battery assembly equipment of the embodiment of the present application adopts a honeycomb microchannel manifold design combined with dynamic vacuum pressure control technology, uses piezoelectric microvalves to adjust the channel opening size in real time, constructs a gradient vacuum field, and accurately controls the penetration path and speed of the electrolyte in the electrode pores, effectively solving industry problems such as uneven penetration and residual micropore bubbles caused by traditional uniform vacuum processes, thereby significantly improving the electrolyte filling uniformity and bubble removal efficiency, while shortening the vacuum processing time, improving the electrolyte utilization rate, and greatly optimizing the battery electrochemical performance, providing a reliable technical path for large-scale and efficient manufacturing of high-energy-density button batteries.

[0089] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. A button battery assembly device, characterized in that: It comprises a main body (1) and a vacuum assembly (2), wherein: The vacuum assembly (2) includes a sealed cabin (21) connected by an electric telescopic rod (11); A honeycomb microchannel manifold (22) in communication with the sealed cabin (21) is installed on the sealed cabin (21), and the honeycomb microchannel manifold (22) is a circular array; An interconnection shell (23) is installed on the top of the honeycomb microchannel manifold (22); A vacuum pump (24) is installed on the interconnected shell (23); The microchannels in the honeycomb microchannel manifold (22) are all connected to electric microvalves (25); A plurality of pressure sensors (26) are installed at the bottom end of the honeycomb micro-channel manifold (22).

2. The button battery assembly equipment according to claim 1, characterized in that: The material of the honeycomb microchannel manifold (22) is (316)L stainless steel or nano-ceramic coated aluminum-based composite material.

3. The button battery assembly equipment according to claim 1, characterized in that: The pressure sensor (26) scans the vacuum distribution, generates a three-dimensional pressure cloud map using the vacuum distribution data, and uses Calculate local pressure gradients in real time.

4. The button battery assembly equipment according to claim 1, characterized in that: Each flow channel outlet in the honeycomb micro-channel manifold (22) corresponds to a corresponding area on the surface of the battery shell.

5. The button battery assembly equipment according to claim 1, characterized in that: The honeycomb microchannel manifolds (22) are distributed in a honeycomb hexagonal array.

6. The button battery assembly equipment according to claim 5, characterized in that: The inlet of the flow channel in the honeycomb micro-channel manifold (22) is chamfered at 45 degrees.

7. The button battery assembly equipment according to claim 1, characterized in that: An injection inner needle (3) is arranged in the sealed cabin (21), an air supply cylinder (4) is slidably arranged on the surface of the injection inner needle (3), and a blocking groove (5) is opened on the air supply cylinder (4).

8. The button battery assembly equipment according to claim 7, characterized in that: A spiral plate is installed in the blocking groove (5), and the spiral plate is used to guide the airflow to form a swirl.

9. The button battery assembly equipment according to claim 7, characterized in that: A fixing plate (6) is installed in the air supply cylinder (4) via a connecting rod, an air bag (7) is installed on the fixing plate (6), and the air bag (7) is connected to an air pressure sensor. An adjusting ring (8) is installed at one end of the injection needle (3).

10. An assembly method for the button battery assembly equipment according to claims 1-9, characterized in that: The following steps are involved: Step 1: firstly, the button battery to be assembled is placed in a sealed cabin (21), and then vacuumed using a honeycomb microchannel manifold (22); Step 2: Real-time monitoring of the pressure in the local area by the corresponding pressure sensor (26), when the vacuum degree in the local area deviates from the set value, the opening of the corresponding micro valve is controlled to adjust the local vacuum degree; Step 3: When vacuuming, use the injection needle (3) on the sealed cabin (21) to inject liquid; Step 4: While injecting liquid, the spiral plate inside the air supply cylinder (4) on the sealed cabin (21) is used to make the gas discharged from the barrier groove (5) form an air curtain isolation layer to construct a zero-power anti-splash barrier.

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