Liquid injection device for sodium ion battery processing and use method thereof

Abstract

The invention relates to the technical field of sodium ion battery processing, and discloses a liquid injection device for sodium ion battery processing and a use method thereof.The liquid injection device adopts a liquid injection structure with an inner barrel and an outer barrel separated independently, the layout is compact, the structural size is small, and a gas path port in the upper portion of a liquid injection inner barrel is alternately communicated with a vacuum pump and a gas storage tank through a reversing valve; residual bubbles in injected liquid can be effectively removed through secondary vacuum bubble removal before liquid injection, and when the injected liquid overflows due to abnormal conditions, the injected liquid can be intensively retained in the air exhaust outer cylinder through cooperation of the anti-overflow ring block and the inner cavity of the air exhaust outer cylinder, so that equipment damage caused by backflow of the injected liquid through an air path can be avoided, and the service life of the injection liquid is prolonged. The conveying structure that cylinder body pushing feeding is matched with rail base moving feeding is adopted, feeding and discharging work of the sodium ion batteries can be efficiently completed, the sodium ion batteries can be orderly stored on the upper portion of the battery positioning frame after being machined and can be integrally transferred to a next-stage machining mechanism, connection is smooth, and the overall machining efficiency of the equipment can be improved.

Description

Technical Field

[0001] This invention relates to the field of sodium-ion battery processing technology, specifically to a liquid injection device for sodium-ion battery processing and its usage method. Background Technology

[0002] With the continuous development of energy storage technology, the application of ion batteries is becoming more and more widespread. Sodium-ion batteries, as an emerging energy storage device, are similar in principle to lithium batteries. The difference is that sodium-ion batteries rely on the reversible migration of sodium ions between the positive and negative electrodes to achieve battery charging and discharging. Due to its abundant raw material resources and low cost, it has shown great application potential in the field of large-scale energy storage.

[0003] Liquid injection is a crucial step in the production of sodium-ion batteries, directly impacting battery performance and quality. Controlling air bubbles during liquid injection is paramount. While traditional injection devices perform pre-air bubble removal within the storage tank, bubbles still form during pumping, affecting overall quality. Furthermore, existing injection devices often employ a clamping feeding structure for battery feeding and discharging, resulting in complex operation and low feeding efficiency. Therefore, this paper proposes a liquid injection device for sodium-ion battery processing and its application method. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid injection device for sodium-ion battery processing and its usage method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid injection device for sodium-ion battery processing, comprising a material conveying mechanism and a liquid injection mechanism for sodium-ion battery liquid injection processing. The material conveying mechanism is used for loading and unloading sodium-ion batteries. The material conveying mechanism includes a material conveying rail, a material conveying drive motor, a material conveying platform, a battery positioning frame, and a pushing cylinder. The material conveying platform is horizontally slidably mounted on the upper part of the material conveying rail driven by the material conveying drive motor. The sodium-ion batteries, which are distributed at equal intervals, are supported and positioned on the upper part of the material conveying platform by the battery positioning frame. The pushing cylinder is equidistantly arranged on the side of the material conveying rail. The push rod end of the pushing cylinder is provided with a pushing end block, and the head end of the pushing end block is provided with a magnetic end seat. The liquid injection mechanism is used for liquid injection processing of sodium-ion batteries. The liquid injection mechanism includes a support base, a vertical support, a lifting drive motor, a liquid injection pump, a vacuum pump, a gas storage tank, and a liquid injection assembly. The vertical support is installed at equal intervals on the upper part of the support base. The liquid injection assembly is vertically movable and installed on the front part of the vertical support by the lifting drive motor. The support base has a positioning slot on its side. The liquid injection assembly includes an outer vacuum cylinder, an outer cylinder end cap, a liquid injection inner cylinder, and an anti-overflow ring. The outer vacuum cylinder is connected to and installed in connection with a vacuum pump. An air extraction end column is provided at the lower part of the outer vacuum cylinder. The anti-overflow ring is installed on the air passage connection side of the air extraction end column. The liquid injection inner cylinder is sealed inside the outer vacuum cylinder through the outer cylinder end cap. The air passage end of the liquid injection inner cylinder is alternately connected to the vacuum pump and the gas storage tank through a reversing valve. The liquid passage end of the liquid injection inner cylinder is connected to the liquid injection pump. A liquid injection end pipe is provided at the lower part of the liquid injection inner cylinder.

[0006] Preferably, the upper part of the above-mentioned material conveying rail is fixedly installed with a support guide rail in a parallel shape, and the lower part of the material conveying platform is fixedly installed with a support rail seat, and the groove at the lower part of the support rail seat is slidably fitted and supported by the support guide rail.

[0007] Preferably, the aforementioned material conveying drive motor is fixedly installed to the edge of the material conveying rail seat by bolts, and a transmission screw is fixedly installed on the drive shaft end of the material conveying drive motor. A transmission screw seat is provided at the lower part of the material conveying platform, and the screw part of the transmission screw is threadedly installed into the screw hole in the middle of the transmission screw seat.

[0008] Preferably, a positioning block is provided on the upper part of the above-mentioned feeding platform, and the battery positioning frame is fixedly installed on the upper part of the feeding platform by the positioning block. The middle part of the battery positioning frame is provided with positioning grooves evenly spaced at equal intervals. The sodium-ion battery is aligned and fitted and installed on the inner side of the positioning groove. A push-through groove is provided through the rear part of the positioning groove.

[0009] Preferably, the aforementioned pushing cylinder is fixedly installed on the side of the material conveying rail seat in an equidistant manner by a support, the positioning slot is evenly opened on the side of the support seat in an equidistant manner, the pushing cylinder and the positioning slot are positioned correspondingly, the pushing end block is fixedly installed on the push rod end of the pushing cylinder, and the magnetic end seat is fixedly installed on the front material picking side of the pushing end block. During operation, the pushing end block is fixedly adsorbed and connected to the side of the sodium-ion battery through the magnetic end seat.

[0010] Preferably, the vertical supports are fixedly installed on the upper part of the support platform by bolts in an equidistant manner. A vertical slide is installed on the front part of the support platform. The lifting drive motor is installed on the upper drive side of the vertical slide. The lower part of the exhaust cylinder is fixedly installed to the lower support part of the vertical slide by bolts.

[0011] Preferably, the vacuum pump is fixedly installed on the rear support side of the vertical support by bolts. The side of the outer cylinder is fixedly connected to an air extraction end pipe, which is connected to the main air extraction end of the vacuum pump through a conduit. The air extraction end column is fixedly installed in the middle of the bottom side of the outer cylinder. The lower part of the air extraction end column is uniformly provided with air extraction holes in a circular shape. The upper part of the air extraction end column is provided with a docking support. The air extraction holes are connected to the groove of the docking support. The anti-overflow ring is fitted into the inner side of the groove of the docking support. The groove of the docking support is uniformly provided with a connecting slot on the periphery.

[0012] Preferably, the lower part of the injection inner cylinder is fixedly installed to the upper part of the docking support by bolts, the injection end pipe is fixedly connected to the lower part of the injection inner cylinder, and after installation, the injection end pipe is inserted into the through hole in the middle of the suction end column. A miniature solenoid valve is provided in the middle of the injection end pipe, the outer cylinder end cap is fixedly installed to the upper opening side of the suction outer cylinder by bolts, and the upper opening side of the injection inner cylinder is fixedly installed with an inner cylinder end cap by bolts. After installation, the upper part of the inner cylinder end cap is fitted and pushed against the annular groove on the bottom side of the injection inner cylinder.

[0013] Preferably, a liquid guide column is fixedly installed through the middle of the inner cylinder end cap, the liquid injection pump is fixedly installed at the front of the vertical support by bolts, the upper end of the liquid guide column is connected to the liquid outlet of the liquid injection pump through a conduit, a gas guide pipe is fixedly installed at the upper part of the inner cylinder end cap, the gas storage tank is fixedly installed at the side of the vertical support, and the gas guide pipe is alternately connected to the auxiliary suction end of the vacuum pump and the gas outlet end of the gas storage tank through a reversing valve.

[0014] The present invention also provides a method of using a liquid injection device for sodium-ion battery processing, comprising the following steps: S1. Work preparation: Before processing, the battery positioning frame with sodium-ion batteries installed is moved and installed on the upper part of the conveying platform by the conveying device. The battery positioning frame is installed and positioned by the interlocking positioning block on the upper part of the conveying platform. The station status of the push cylinder is detected and the positioning calibration of the conveying platform is completed through trial displacement work, and the feeding work is completed. S2. Feeding: During operation, the liquid injection mechanism is in a ready state. The feeding drive motor drives the feeding platform to move the battery positioning frame to the feeding position. The device feeds from the end. The last pushing cylinder corresponds to the first positioning slot on the upper part of the battery positioning frame. The slot on the upper part of the battery positioning frame is divided into three equal sections by three sets of pushing cylinders. Feeding is carried out by pushing in sequence. The feeding of three sets of sodium-ion batteries can be completed at one time. During feeding, the pushing cylinder drives the pushing end block to contact the sodium-ion battery through the pushing channel. The magnetic end seat at the front is attracted and connected to the side seat of the sodium-ion battery. Then, the sodium-ion battery is pushed into the inner side of the positioning slot by moving forward. The precise positioning and feeding of the sodium-ion battery is completed by guiding and positioning through the slot opening in the positioning slot. After that, the pushing cylinder maintains the working position and presses and limits the sodium-ion battery after feeding to complete the feeding limit work. S3. Liquid Injection Process: After the sodium-ion battery is positioned and installed, the three sets of liquid injection components are driven by a lifting drive motor to move synchronously downwards. Upon reaching the liquid injection station, the evacuation end column is tightly fitted into the interface at the top of the sodium-ion battery. Simultaneously, the liquid injection end tube is aligned and inserted into the inner hole of the interface at the top of the sodium-ion battery. Then, the liquid injection pump is started, and electrolyte is slowly injected into the inner cylinder at a preset injection speed using precise metering. After liquid injection is completed, the liquid injection passage is closed, and the venting end tube at the top of the inner cylinder is switched to connect with the vacuum pump. The vacuum pump is started to perform vacuum evacuation of the inner cavities of both the sodium-ion battery and the inner cylinder, removing excess air from the sodium-ion battery. After vacuuming is completed by removing air bubbles from the electrolyte in the inner cylinder, the miniature solenoid valve on the side of the injection end pipe opens, allowing the electrolyte in the inner cylinder to enter the sodium-ion battery. Then, by switching the gas valve, the gas guide pipe at the top of the inner cylinder is connected to the gas storage tank. By controlling the gas supply, inert gas is injected into the sodium-ion battery and the electrolyte in the inner cylinder is drained, completing the injection process. During the process, if electrolyte overflow occurs, the electrolyte is first buffered and adsorbed by the anti-overflow ring block with a porous structure and water absorption properties to prevent liquid splashing. Then, the electrolyte is temporarily collected in the inner cavity of the outer cylinder, which can prevent equipment damage caused by electrolyte backflow through the gas path. S4. After the liquid injection process is completed, the liquid injection assembly is driven upward and reset by the lifting drive motor. Then, the push cylinder retracts to pull back the liquid-injected sodium-ion battery and separates it from the sodium-ion battery through the support push end block of the rear bracket of the battery positioning frame. Then, the battery positioning frame moves forward one station and completes the work of loading the next group of sodium-ion batteries through the push cylinder. This cycle continues until the material on the upper part of the battery positioning frame is exhausted. Then, the next group of battery positioning frames moves to the loading position to continue the loading work. At the same time, the battery positioning frames after liquid injection are transferred as a whole to the subsequent processing mechanism through the conveying mechanism and the unprocessed battery positioning frames are reloaded. After the liquid injection process of the batteries on the upper part of another group of battery positioning frames is completed, the conveying platform moves and resets to the starting position to continue the lateral feeding. At the same time, the conveying mechanism on the other side completes the transfer and loading of the processed battery positioning frames, completing the processing cycle.

[0015] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects: 1. This liquid injection device adopts an independently separated inner and outer cylinder liquid injection structure. The outer vacuum cylinder is connected to the vacuum pump and installed on the outside for vacuum pumping during battery liquid injection. The inner liquid injection cylinder is integrated and installed inside the outer vacuum cylinder. The layout is compact and has a small structural volume. Furthermore, the gas port at the top of the inner liquid injection cylinder is alternately connected to the vacuum pump and the gas storage tank through a reversing valve, which can separately complete the secondary defoaming and inert gas filling work of liquid injection. The secondary vacuum defoaming before liquid injection can effectively remove residual air bubbles in the liquid injection, which is beneficial to improving the quality of battery liquid injection.

[0016] 2. The outer suction cylinder adopts a sealed cylinder seat structure, and an anti-overflow ring block is installed at the suction connection at the bottom of the outer suction cylinder. In case of overflow caused by abnormal conditions, the porous structure of the anti-overflow ring block and the absorption effect of the injected liquid, together with the inner cavity of the outer suction cylinder, can concentrate the injected liquid in the outer suction cylinder, which can avoid equipment damage caused by the backflow of injected liquid through the air path and improve the stability of equipment operation.

[0017] 3. The feeding structure adopts a cylinder-push feeding combined with a rail-mounted moving feeding system. The feeding platform installed on the upper part of the feeding rail drives the displacement of the battery positioning frame. The sodium-ion batteries installed at equal intervals on the upper part of the battery positioning frame are pushed and fed by the spaced-out push cylinders. The push end block of the push cylinder push rod is magnetically attached. The sodium-ion batteries can be filled, pressed and pulled back by pushing and pulling. Combined with the lateral movement of the battery positioning frame, the loading and unloading of sodium-ion batteries can be completed efficiently without complicated transfer and handling, which greatly improves the working efficiency of the device. After processing, the sodium-ion batteries can be neatly stored on the upper part of the battery positioning frame and can be transferred as a whole to the next processing mechanism. The smooth connection is conducive to improving the overall processing efficiency of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall front-side structure of the present invention. Figure 2 This is a schematic diagram of the overall rear structure of the present invention; Figure 3 This is a schematic diagram of the working installation structure of the material conveying mechanism of the present invention; Figure 4 This is a schematic diagram of the working and installation structure of the push cylinder and battery positioning frame of the present invention; Figure 5 This is a schematic diagram of the overall installation structure of the injection mechanism of the present invention; Figure 6 This is a schematic diagram of the upper structure of the liquid injection assembly in operation according to the present invention; Figure 7 This is a schematic diagram of the lower structure of the liquid injection assembly of the present invention during operation; Figure 8 This is a schematic diagram of the installation structure of the liquid injection inner cylinder of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Conveying rail seat; 2. Conveying drive motor; 3. Conveying platform; 4. Battery positioning frame; 5. Pushing cylinder; 6. Positioning slot; 7. Pushing channel; 8. Pushing end block; 9. Support platform; 10. Vertical support; 11. Lifting drive motor; 12. Liquid injection pump; 13. Vacuum pump; 14. Gas storage tank; 15. Positioning slot; 16. Vacuum outer cylinder; 17. Outer cylinder end cap; 18. Liquid injection inner cylinder; 19. Anti-overflow ring block; 20. Vacuum end column; 21. Connecting support; 22. Liquid injection end pipe; 23. Inner cylinder end cap; 24. Liquid guiding end column. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] Example Please see Figure 1-8 This invention provides a technical solution: a liquid injection device for sodium-ion battery processing, comprising a material conveying mechanism and a liquid injection mechanism for sodium-ion battery liquid injection processing, specifically: The feeding mechanism is used for loading and unloading sodium-ion batteries. It includes a feeding rail 1, a feeding drive motor 2, a feeding platform 3, a battery positioning frame 4, and a pushing cylinder 5. The feeding platform 3 is horizontally slidably mounted on top of the feeding rail 1, driven by the feeding drive motor 2. See attached diagram for details. Figure 3 As shown, in order to achieve the sliding guide support of the conveying platform 3, a support guide rail is fixedly installed in parallel on the upper part of the conveying rail seat 1, and a support rail seat is fixedly installed on the lower part of the conveying platform 3. The slot at the lower part of the support rail seat slides and engages with the support guide rail for support, which can ensure the stability of the sliding support of the conveying platform 3. The conveying drive motor 2 is a servo motor used for driving the work of the conveying platform 3. The conveying drive motor 2 is fixedly installed on the edge of the conveying rail seat 1 by bolts. A transmission screw is fixedly installed on the drive shaft end of the conveying drive motor 2. A transmission screw seat is provided at the lower part of the conveying platform 3. The screw part of the transmission screw is threaded into the screw hole in the middle of the transmission screw seat to achieve precise driving of the displacement of the conveying platform 3. In order to facilitate the positioning and installation of the battery positioning frame 4, a positioning block is provided on the upper part of the conveying platform 3. The battery positioning frame 4 is fixedly installed on the upper part of the conveying platform 3 by the positioning block.

[0024] Battery positioning bracket 4 is used for positioning and installing sodium-ion batteries, as shown in the attached document. Figure 4As shown, to facilitate the positioning and installation of sodium-ion batteries, positioning slots 6 are evenly spaced in the middle of the battery positioning frame 4. Sodium-ion batteries are aligned and fitted inside the positioning slots 6. The evenly spaced sodium-ion batteries are positioned and mounted on the upper part of the conveying platform 3 by the battery positioning frame 4. To facilitate the feeding and pushing of sodium-ion batteries, a pushing groove 7 is provided through the rear of the positioning slots 6. The pushing cylinder 5 is a pneumatic cylinder, and is fixedly installed on the side of the conveying rail 1 by a support. The positioning slots 6 are evenly spaced on the side of the support platform 9, and the positions of the pushing cylinder 5 and the positioning slots 6 correspond. To facilitate material feeding and pushing, a pushing end block 8 is provided at the push rod end of the pushing cylinder 5. A magnetic end seat is provided at the end of the pushing end block 8. The pushing end block 8 is fixedly installed on the push rod end of the pushing cylinder 5, and the magnetic end seat is fixedly installed on the pushing end block 8. The front of the material-picking side of the material-end block 8 is fixedly connected to the edge of the sodium-ion battery through a magnetic end seat during operation. It adopts a cylinder-push feeding and rail-mounted moving feeding conveying structure. The feeding platform 3 installed on the upper part of the feeding rail seat 1 drives the displacement of the battery positioning frame 4. The push cylinders 5, which are set at intervals, push the sodium-ion batteries installed at equal intervals on the upper part of the battery positioning frame 4. The push end block 8 at the push rod end of the push cylinder 5 is magnetically attached. The sodium-ion battery can be filled, pressed and pulled back by pushing and pulling. With the lateral movement of the battery positioning frame 4, the loading and unloading of sodium-ion batteries can be completed efficiently without complicated transfer and handling, which greatly improves the working efficiency of the device. After processing, the sodium-ion batteries can be neatly stored on the upper part of the battery positioning frame 4 and can be transferred as a whole to the next processing mechanism. The smooth connection is conducive to improving the overall processing efficiency of the equipment.

[0025] Liquid injection mechanism: Used for liquid injection processing of sodium-ion batteries. The liquid injection mechanism includes a support base 9, a vertical support 10, a lifting drive motor 11, a liquid injection pump 12, a vacuum pump 13, a gas storage tank 14, and liquid injection components. The vertical support 10 is installed equidistantly on the upper part of the support base 9. (See attached diagram for details.) Figure 5As shown, the vertical support 10 is fixedly installed on the upper part of the support base 9 at equal intervals by bolts. A vertical slide is installed on the front part of the support base 9. The lifting drive motor 11 is installed on the upper drive side of the vertical slide, and the lifting drive of the vertical slide is realized through the screw drive. The liquid injection assembly is vertically movable and installed on the front part of the vertical support 10 by the lifting drive motor 11. Specifically, the liquid injection assembly includes an outer suction cylinder 16, an outer cylinder end cap 17, a liquid injection inner cylinder 18, and an anti-overflow ring block 19. The outer suction cylinder 16 is connected to the vacuum pump 13. Specifically, the lower part of the outer suction cylinder 16 is fixedly installed on the lower support part of the vertical slide by bolts. The vacuum pump 13 is fixedly installed on the rear support side of the vertical support 10 by bolts. An air extraction end pipe is fixedly connected to the side of the outer suction cylinder 16. The air extraction end pipe is connected to the main air extraction end of the vacuum pump 13 through a conduit. In order to realize the air extraction operation, as shown in the attached figure... Figure 6 As shown, an air extraction end column 20 is provided at the lower part of the air extraction outer cylinder 16. The air extraction end column 20 is fixedly connected and installed in the middle of the bottom side of the air extraction outer cylinder 16. The lower part of the air extraction end column 20 is uniformly provided with air extraction holes in a circular shape.

[0026] The anti-overflow ring 19 can be made of porous sponge. The anti-overflow ring 19 is installed on the air passage connection side of the suction end column 20. Specifically, for docking installation, see attached... Figure 6 As shown, a docking support 21 is provided on the upper part of the suction end column 20. The suction hole is connected to the groove of the docking support 21. The anti-overflow ring block 19 is fitted into the inner side of the groove of the docking support 21. In order to facilitate the air passage connection, a connecting slot is evenly opened through the periphery of the groove of the docking support 21. When the liquid overflows due to abnormal conditions, the porous structure of the anti-overflow ring block 19 and the absorption effect of the liquid, combined with the inner cavity of the suction outer cylinder 16, can concentrate the liquid in the suction outer cylinder 16, which can avoid the equipment damage caused by the liquid flowing back through the air passage and improve the working stability of the equipment.

[0027] The inner injection cylinder 18 is sealed inside the outer suction cylinder 16 via the outer cylinder end cap 17, as detailed in the attached document. Figure 7As shown, the lower part of the injection inner cylinder 18 is fixedly installed to the upper part of the docking support 21 by bolts. The injection end pipe 22 is fixedly installed in the lower part of the injection inner cylinder 18. After installation, the injection end pipe 22 is inserted through the through hole in the middle of the suction end column 20. In order to realize the connection and switching control of the injection end pipe 22, a miniature solenoid valve is installed in the middle of the injection end pipe 22. The outer cylinder end cap 17 is fixedly installed to the upper opening side of the suction outer cylinder 16 by bolts. The injection inner cylinder 18... The inner cylinder end cap 23 is fixedly installed on the upper open side by bolts. After installation, the upper part of the inner cylinder end cap 23 is fitted and pushed against the bottom groove of the liquid injection inner cylinder 18 to realize the installation limit of the upper part of the liquid injection inner cylinder 18. The device adopts an independent liquid injection structure with separate inner and outer cylinders. The external vacuum cylinder 16 is connected to the vacuum pump 13 for vacuum pumping during battery liquid injection. The liquid injection inner cylinder 18 is integrated and installed inside the vacuum cylinder 16. The layout is compact and has a small structural volume.

[0028] The inner cylinder end cap 23 is used for intermediate storage of electrolyte. The liquid passage end of the inner cylinder 18 is connected to the injection pump 12. See attached diagram for details. Figure 8 As shown, to achieve liquid supply connectivity, a liquid guide column 24 is fixedly installed through the middle of the inner cylinder end cap 23. The liquid injection pump 12 is fixedly installed at the front of the vertical support 10 by bolts. The upper end of the liquid guide column 24 is connected to the liquid outlet of the liquid injection pump 12 through a conduit to achieve quantitative supply and delivery of electrolyte. The gas path end of the liquid injection inner cylinder 18 is alternately connected to the vacuum pump 13 and the gas storage tank 14 through a reversing valve. To facilitate gas connection, a connection device is fixedly installed at the upper part of the inner cylinder end cap 23. Equipped with a gas guide pipe, the gas storage tank 14 is fixedly installed on the side of the vertical support 10. The gas guide pipe is alternately connected to the auxiliary suction end of the vacuum pump 13 and the gas outlet end of the gas storage tank 14 through a reversing valve. The gas port at the top of the liquid injection inner cylinder 18 is alternately connected to the vacuum pump 13 and the gas storage tank 14 through a reversing valve. This allows for the completion of secondary defoaming and inert gas filling during liquid injection. The secondary vacuum defoaming before liquid injection can effectively remove residual air bubbles in the liquid, which is beneficial to improving the quality of battery liquid injection.

[0029] Working principle or structural principle: Before processing, the battery positioning frame 4 with sodium-ion batteries is moved and installed on the upper part of the conveying platform 3 by the conveying device. The battery positioning frame 4 is installed and positioned by the interlocking positioning block on the upper part of the conveying platform 3. The station status of the pushing cylinder 5 is detected and the positioning calibration of the conveying platform 3 is completed through trial displacement work, and the feeding work is completed. During operation, the liquid injection mechanism is in a ready state. The feeding drive motor 2 drives the feeding platform 3 to move the battery positioning frame 4 to the feeding position. The device feeds from the end. The last pushing cylinder 5 corresponds to the first positioning slot 6 on the upper part of the battery positioning frame 4. The slot on the upper part of the battery positioning frame 4 is divided into three equal sections by three sets of pushing cylinders 5. The feeding is carried out by pushing in sequence. The feeding of three sets of sodium-ion batteries can be completed at one time. During feeding, the pushing cylinder 5 drives the pushing end block 8 to contact the sodium-ion battery through the pushing channel 7. The magnetic end seat at the front is attracted and connected to the side seat of the sodium-ion battery. Then, the sodium-ion battery is pushed into the inner side of the positioning slot 15 by pushing forward. The precise positioning and feeding of the sodium-ion battery is completed by the slot guide positioning in the positioning slot 15. After that, the pushing cylinder 5 maintains the working position and presses and limits the sodium-ion battery after feeding to complete the feeding limit work. After the sodium-ion battery is positioned and installed, the three sets of electrolyte injection components are driven by the lifting drive motor 11 to move synchronously downwards. Upon reaching the injection station, the evacuation end column 20 is tightly fitted into the interface at the top of the sodium-ion battery. Simultaneously, the electrolyte injection end tube 22 is aligned and inserted into the inner hole of the interface at the top of the sodium-ion battery. Then, the electrolyte injection pump 12 starts and slowly injects electrolyte into the inner injection cylinder 18 at a preset injection speed using precise metering. After injection, the injection passage is closed, and the venting end tube at the top of the inner injection cylinder 18 is switched to connect with the vacuum pump 13. The vacuum pump 13 starts to evacuate the inner cavities of both the sodium-ion battery and the inner injection cylinder 18, removing excess air from the sodium-ion battery. After the air bubbles in the electrolyte inside the inner injection cylinder 18 are removed and the vacuum is completed, the miniature solenoid valve on the side of the injection end pipe 22 is opened, allowing the electrolyte in the inner injection cylinder 18 to enter the sodium-ion battery. Then, the gas valve is switched to connect the gas guide pipe at the top of the inner injection cylinder 18 to the gas storage tank 14. By controlling the gas supply, inert gas is injected into the sodium-ion battery and the electrolyte in the inner injection cylinder 18 is drained, completing the injection process. During the process, if electrolyte overflow occurs, the electrolyte is first buffered and adsorbed by the anti-overflow ring block 19 with a porous structure and water absorption characteristics to prevent liquid splashing. Then, the electrolyte is temporarily collected in the inner cavity of the outer vacuum cylinder 16 to prevent the electrolyte from flowing back through the gas path and causing equipment damage. After the liquid injection process is completed, the injection assembly is driven upward and reset by the lifting drive motor 11. Then, the push cylinder 5 retracts to pull back the injected sodium-ion battery and separates it from the sodium-ion battery through the support push end block 8 of the rear bracket of the battery positioning frame 4. Then, the battery positioning frame 4 moves forward one station and completes the loading of the next group of sodium-ion batteries by the push cylinder 5. This cycle continues until the material on the upper part of the battery positioning frame 4 is exhausted. Then, the next group of battery positioning frames 4 moves to the loading position to continue the loading work. At the same time, the battery positioning frames 4 after liquid injection are transferred as a whole to the subsequent processing mechanism by the conveying mechanism and the unprocessed battery positioning frames 4 are reloaded. After the liquid injection processing of the batteries on the upper part of another group of battery positioning frames 4 is completed, the conveying platform 3 moves and resets to the starting position to continue the transverse feeding. At the same time, the conveying mechanism on the other side completes the transfer and loading of the processed battery positioning frames 4, completing the processing cycle.

[0030] In summary, this liquid injection device adopts an independently separated inner and outer cylinder liquid injection structure. The external vacuum cylinder 16 is connected to the vacuum pump 13 for vacuum pumping during battery liquid injection. The inner liquid injection cylinder 18 is integrated inside the vacuum cylinder 16, resulting in a compact layout and small structural volume. Furthermore, the gas port at the top of the inner liquid injection cylinder 18 is alternately connected to the vacuum pump 13 and the gas storage tank 14 via a reversing valve, allowing for secondary defoaming and inert gas filling during liquid injection. Secondary vacuum defoaming before liquid injection effectively removes residual air bubbles, improving the quality of battery liquid injection. The vacuum cylinder 16 adopts a sealed cylinder-type structure, and an anti-overflow ring 19 is installed at the lower vacuum connection point of the outer cylinder 16. In case of overflow due to abnormal conditions, the porous structure of the anti-overflow ring 19, combined with its absorption effect and the capacity of the inner cavity of the vacuum cylinder 16, ensures that the liquid is concentrated and retained. Inside the outer vacuum cylinder 16, equipment damage caused by liquid backflow from the air path during liquid injection is avoided, which is beneficial to improving the stability of equipment operation. A conveying structure with cylinder pushing and rail seat moving feeding is adopted. The conveying platform 3 installed on the upper part of the conveying rail seat 1 drives the displacement of the battery positioning frame 4, and the sodium-ion batteries installed at equal intervals on the upper part of the battery positioning frame 4 are pushed and fed by the spaced pushing cylinders 5. The pushing end block 8 at the push rod end of the pushing cylinder 5 is magnetically attached. The liquid injection, feeding, pressing and resetting of the sodium-ion batteries can be completed by pushing and pulling back. With the lateral movement of the battery positioning frame 4, the loading and unloading of sodium-ion batteries can be completed efficiently without complicated transfer and handling, which greatly improves the working efficiency of the device. After processing, the sodium-ion batteries can be neatly stored on the upper part of the battery positioning frame 4 and can be transferred as a whole to the lower processing mechanism. The smooth connection is beneficial to improving the overall processing efficiency of the equipment.

[0031] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A liquid injection device for sodium-ion battery processing, comprising a material conveying mechanism and a liquid injection mechanism for sodium-ion battery liquid injection processing, characterized in that, The feeding mechanism is used for loading and unloading sodium-ion batteries. The feeding mechanism includes a feeding rail (1), a feeding drive motor (2), a feeding platform (3), a battery positioning frame (4), and a pushing cylinder (5). The feeding platform (3) is driven by the feeding drive motor (2) to slide horizontally on the upper part of the feeding rail (1). The sodium-ion batteries, which are distributed at equal intervals, are supported and positioned on the upper part of the feeding platform (3) by the battery positioning frame (4). The pushing cylinder (5) is arranged at equal intervals on the side of the feeding rail (1). The push rod end of the pushing cylinder (5) is provided with a pushing end block (8), and the end head of the pushing end block (8) is provided with a magnetic end seat. The liquid injection mechanism is used for liquid injection processing of sodium-ion batteries. The liquid injection mechanism includes a support base (9), a vertical support (10), a lifting drive motor (11), a liquid injection pump (12), a vacuum pump (13), a gas storage tank (14), and a liquid injection assembly. The vertical support (10) is installed at equal intervals on the upper part of the support base (9). The liquid injection assembly is driven vertically to be installed on the front part of the vertical support (10) by the lifting drive motor (11). The support base (9) is provided with a positioning slot (15) on its side. The liquid injection assembly includes an outer suction cylinder (16), an outer cylinder end cap (17), an inner injection cylinder (18), and an anti-overflow ring block (19). The outer suction cylinder (16) is connected to the vacuum pump (13). An suction end column (20) is provided at the lower part of the outer suction cylinder (16). The anti-overflow ring block (19) is installed on the gas path connection side of the suction end column (20). The inner injection cylinder (18) is sealed inside the outer suction cylinder (16) through the outer cylinder end cap (17). The gas path end of the inner injection cylinder (18) is alternately connected to the vacuum pump (13) and the gas storage tank (14) through a reversing valve. The liquid path end of the inner injection cylinder (18) is connected to the liquid injection pump (12). An injection end pipe (22) is provided at the lower part of the inner injection cylinder (18).

2. The electrolyte injection device for sodium-ion battery processing according to claim 1, characterized in that, The upper part of the material conveying rail seat (1) is fixedly installed with a support rail in a parallel shape, and the lower part of the material conveying platform (3) is fixedly installed with a support rail seat. The groove at the lower part of the support rail seat is slidably fitted with the support rail for support installation.

3. The electrolyte injection device for sodium-ion battery processing according to claim 2, characterized in that, The material conveying drive motor (2) is fixedly installed to the side of the material conveying rail seat (1) by bolts. A transmission screw is fixedly installed at the drive shaft end of the material conveying drive motor (2). A transmission screw seat is provided at the lower part of the material conveying platform (3). The screw part of the transmission screw is threadedly installed with the screw hole in the middle of the transmission screw seat.

4. The electrolyte injection device for sodium-ion battery processing according to claim 3, characterized in that, The upper part of the feeding platform (3) is provided with a positioning block. The battery positioning frame (4) is fixedly installed on the upper part of the feeding platform (3) by the positioning block. The middle part of the battery positioning frame (4) is provided with positioning grooves (6) at equal intervals. The sodium-ion battery is installed on the inner side of the positioning groove (6) for alignment and fitting support. The rear part of the positioning groove (6) is provided with a pusher groove (7).

5. The electrolyte injection device for sodium-ion battery processing according to claim 4, characterized in that, The push cylinder (5) is fixedly installed on the side of the material conveying rail seat (1) in an equidistant manner by a support. The positioning groove (6) is evenly opened on the side of the support platform (9) in an equidistant manner. The positions of the push cylinder (5) and the positioning groove (6) are corresponding. The push end block (8) is fixedly installed on the push rod end of the push cylinder (5). The magnetic end seat is fixedly installed on the front material picking side of the push end block (8). During operation, the push end block (8) is fixedly adsorbed and connected to the side of the sodium ion battery through the magnetic end seat.

6. The electrolyte injection device for sodium-ion battery processing according to claim 1, characterized in that, The vertical support (10) is fixedly installed on the upper part of the support platform (9) by bolts in an equidistant manner. A vertical slide is installed on the front part of the support platform (9). The lifting drive motor (11) is installed on the upper drive side of the vertical slide. The lower part of the exhaust cylinder (16) is fixedly installed on the lower support part of the vertical slide by bolts.

7. The electrolyte injection device for sodium-ion battery processing according to claim 6, characterized in that, The vacuum pump (13) is fixedly installed on the rear support side of the vertical support (10) by bolts. The side of the outer cylinder (16) is fixedly connected with the suction end pipe. The suction end pipe is connected to the main suction end of the vacuum pump (13) through the conduit. The suction end column (20) is fixedly connected to the middle of the bottom side of the outer cylinder (16). The lower part of the suction end column (20) is uniformly provided with suction holes in a circular shape. The upper part of the suction end column (20) is provided with a docking support (21). The suction holes are connected to the groove of the docking support (21). The anti-overflow ring block (19) is fitted into the inner side of the groove of the docking support (21). The groove of the docking support (21) is uniformly opened with a connecting slot on the periphery.

8. The electrolyte injection device for sodium-ion battery processing according to claim 7, characterized in that, The lower part of the injection inner cylinder (18) is fixedly installed to the upper part of the docking support (21) by bolts. The injection end pipe (22) is fixedly connected to the lower part of the injection inner cylinder (18). After installation, the injection end pipe (22) and the through hole in the middle of the suction end column (20) are inserted and connected. The micro solenoid valve is set in the middle of the injection end pipe (22). The outer cylinder end cap (17) is fixedly installed to the upper opening side of the suction outer cylinder (16) by bolts. The upper opening side of the injection inner cylinder (18) is fixedly installed with the inner cylinder end cap (23) by bolts. After installation, the upper part of the inner cylinder end cap (23) is fitted and pushed against the annular groove on the bottom side of the injection inner cylinder (18).

9. The electrolyte injection device for sodium-ion battery processing according to claim 8, characterized in that, A liquid guide column (24) is fixedly installed through the middle of the inner cylinder end cap (23). The liquid injection pump (12) is fixedly installed at the front of the vertical support (10) by bolts. The upper end of the liquid guide column (24) is connected to the liquid outlet of the liquid injection pump (12) through a conduit. A gas guide pipe is fixedly installed on the upper part of the inner cylinder end cap (23). The gas storage tank (14) is fixedly installed on the side of the vertical support (10). The gas guide pipe is alternately connected to the auxiliary suction end of the vacuum pump (13) and the gas outlet end of the gas storage tank (14) through a reversing valve.

10. A method of using the electrolyte injection device for sodium-ion battery processing according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Before processing, the battery positioning frame (4) with sodium ion batteries installed is moved and installed on the upper part of the conveying platform (3) by the conveying device. The battery positioning frame (4) is installed and positioned by the fitting of the positioning block on the upper part of the conveying platform (3). The station status of the push cylinder (5) is detected and the positioning calibration of the conveying platform (3) is completed through trial displacement work. The loading work is completed. S2. Loading: During operation, the liquid injection mechanism is in a ready state. The feeding drive motor (2) drives the feeding platform (3) to move the battery positioning frame (4) to the feeding position. The device feeds from the end. The last push cylinder (5) corresponds to the first positioning slot (6) on the upper part of the battery positioning frame (4). The three sets of push cylinders (5) divide the slot on the upper part of the battery positioning frame (4) into three equal sections. The feeding is carried out by pushing in sequence. The loading of three sets of sodium-ion batteries can be completed in one operation. At that time, the push cylinder (5) drives the push end block (8) to contact the sodium-ion battery through the push groove (7), and the front magnetic end seat is adsorbed and connected to the side seat of the sodium-ion battery. Then, the sodium-ion battery is pushed into the inner side of the positioning slot (15) by moving forward. The precise positioning and feeding of the sodium-ion battery is completed by guiding and positioning through the slot in the positioning slot (15). Then, the push cylinder (5) maintains the working position and presses and limits the sodium-ion battery after feeding to complete the feeding and limiting work. S3. Liquid Injection Processing: After the sodium-ion battery is positioned and installed, the three sets of liquid injection components are driven by the lifting drive motor (11) to move down synchronously. After reaching the liquid injection station, the suction end column (20) is tightly fitted and connected to the interface part on the upper part of the sodium-ion battery. At the same time, the liquid injection end pipe (22) is aligned and inserted into the inner hole of the interface on the upper part of the sodium-ion battery. Then, the liquid injection pump (12) is started and the electrolyte is slowly injected into the liquid injection inner cylinder (18) according to the preset liquid injection speed through precise metering. After the liquid injection is completed, the liquid injection passage is closed, and the gas guide end pipe on the upper part of the liquid injection inner cylinder (18) is switched to the state of being connected to the vacuum pump (13). The vacuum pump (13) is started to perform vacuum pumping work on the inner cavity of the sodium-ion battery and the liquid injection inner cylinder (18) respectively to remove excess gas in the sodium-ion battery. After the air and the air bubbles in the electrolyte in the inner cylinder (18) are vacuumed, the micro solenoid valve on the side of the injection end pipe (22) is opened, allowing the electrolyte in the inner cylinder (18) to enter the sodium-ion battery. Then, the air valve is switched to connect the air guide pipe at the top of the inner cylinder (18) with the gas storage tank (14). By controlling the gas supply, inert gas is injected into the sodium-ion battery and the electrolyte in the inner cylinder (18) is drained, completing the injection process. When electrolyte overflow occurs during the process, the electrolyte is first buffered and adsorbed by the anti-overflow ring block (19) with a porous structure and water absorption characteristics to prevent liquid splashing. Then, the electrolyte is temporarily collected in the inner cavity of the outer cylinder (16) to avoid damage to the equipment caused by the electrolyte flowing back through the gas path. S4. After completing the liquid injection process, the liquid injection assembly is driven to move up and reset by the lifting drive motor (11). Then, the push cylinder (5) retracts to pull back the liquid-injected sodium-ion battery and separates it from the sodium-ion battery through the support push end block (8) of the rear bracket of the battery positioning frame (4). Then, the battery positioning frame (4) moves forward one station and completes the work of loading the next group of sodium-ion batteries through the push cylinder (5). The cycle continues until the material on the upper part of the battery positioning frame (4) is exhausted. Then, the next group of battery positioning frames (4) moves to the loading position to continue the loading work. At the same time, the liquid-injected battery positioning frame (4) is transferred as a whole to the subsequent processing mechanism through the conveying mechanism and the unprocessed battery positioning frame (4) is reloaded. After completing the liquid injection process of the battery on the upper part of another group of battery positioning frames (4), the conveying platform (3) moves as a whole to reset to the starting position and continues to perform transverse feeding. At the same time, the other side conveying mechanism completes the transfer and loading work of the processed battery positioning frame (4) and completes the processing cycle.

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