A sodium-ion battery negative electrode sheet cold spraying sodium supplement device and a sodium supplement method

Abstract

The application provides a sodium-ion battery negative electrode sheet cold spraying sodium supplement device and a sodium supplement method, and relates to the technical field of sodium-ion battery processing. The sodium-ion battery negative electrode sheet cold spraying sodium supplement device comprises a sodium supplement operation table, and the upper surface of the sodium supplement operation table is fixedly connected with a sodium supplement spraying box. In the application, a cold air blower and a first air compressor are started, cold air is pressurized by the first air compressor, and then is delivered to the sodium powder inlet pipeline inside through a first gas pipeline. High-pressure gas blows the sodium powder in the sodium powder inlet pipeline inside to the inside of three sodium powder delivery pipelines. A second air compressor is started, high-pressure air is sent into the gas output main pipeline by the second air compressor, and then is delivered into the three sodium powder delivery pipelines through three second gas pipelines to pressurize and deliver the sodium powder again. Finally, the sodium powder is sprayed out of the multiple sodium powder spraying branch pipelines along with the high-pressure gas, so that the sodium powder is sprayed on the negative electrode sheet to supplement sodium, and the process is efficient and safe.

Description

Technical Field

[0001] This invention relates to the field of sodium-ion battery processing technology, specifically to a sodium-ion battery negative electrode cold spraying sodium replenishment device and method. Background Technology

[0002] In recent years, with increasing attention being paid to sodium-ion batteries, more and more technological approaches have been explored to improve their performance. Compared to lithium-ion batteries, lower energy density is the main disadvantage of sodium-ion batteries; and the initial efficiency of the battery has a significant impact on the energy density of sodium-ion batteries. Therefore, improving energy density through pre-sodium absorption has become an essential approach.

[0003] Current pre-sodium methods are still in the early stages of research and development. Referring to lithium-ion battery pre-lithiation, possible routes for pre-sodium are expected to include: sodium powder pre-sodium, rolled pre-sodium, cathode pre-sodium, and electrochemical pre-sodium. Among these, sodium powder pre-sodium has significant safety risks, as sodium is more reactive than lithium and is difficult to process; rolled pre-sodium also has considerable safety risks, the amount of pre-sodium is difficult to control, and sodium foil processing is difficult; cathode pre-sodium has limited pre-sodium capacity; and electrochemical pre-sodium has high process difficulty and cost. Summary of the Invention

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a sodium-replenishing device and method for cold spraying sodium-replenishing on the negative electrode of a sodium-ion battery, thus resolving the defects and deficiencies in the prior art. Technical Solution

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sodium-ion battery negative electrode sheet cold spraying sodium replenishment device, comprising a sodium replenishment operating table, a sodium replenishment spraying box fixedly connected to the upper surface of the sodium replenishment operating table, three sodium powder conveying pipes fixedly connected to the front and rear sides of the sodium replenishment spraying box, a sodium powder transfer pipe fixedly connected to one end of each of the three sodium powder conveying pipes, multiple sodium powder ejection branch pipes fixedly connected to one side of the sodium powder transfer pipe, and a sodium powder inlet pipe fixedly connected to the other end of the three sodium powder conveying pipes, three sets of feeding components connected to the upper surface of the sodium powder inlet pipe, a first air supply component installed on the side wall of the sodium replenishment operating table, two sets of second air supply components installed on the top of the sodium replenishment spraying box, a discharge component installed on one side of the upper surface of the sodium replenishment operating table, and a receiving component installed on the other side of the upper surface of the sodium replenishment operating table.

[0006] Preferably, the feeding assembly includes a sodium powder adding pipe fixedly connected to the upper surface of the sodium powder inlet pipe, a sodium powder storage hopper fixedly connected to the top of the sodium powder adding pipe, and a valve installed on the outer surface of the sodium powder adding pipe.

[0007] Preferably, the first gas supply component includes a connecting mounting base fixedly connected to one side of the sodium replenishment operating table. A cooler and a first air compressor are fixedly connected to the upper surface of the connecting mounting base. A cooler duct is fixedly connected to the outlet of the cooler. The end of the cooler duct away from the cooler is fixedly connected to the inlet of the first air compressor. A first gas pipe is fixedly connected to the outlet of the first air compressor. The end of the first gas pipe away from the first air compressor is fixedly connected to the sodium powder inlet pipe.

[0008] Preferably, the second air supply assembly includes a second air compressor fixedly connected to the top of the sodium spraying box. An air pipe is fixedly connected to the outlet of the second air compressor. A gas output main pipe is fixedly connected to the end of the air pipe away from the second air compressor. Three second gas pipes are fixedly connected to one side of the gas output main pipe. The end of the second gas pipe away from the gas output main pipe is fixedly connected to a corresponding sodium powder conveying pipe. A first one-way valve is installed on the outer surface of the sodium powder conveying pipe, and a second one-way valve is installed on the outer surface of the second gas pipe.

[0009] Preferably, the sodium replenishment spray box has an inlet on one side and an outlet on the other side.

[0010] Preferably, the feeding assembly includes a first rotating column rotatably connected to the upper surface of the sodium replenishment operating table, and a feeding roller is fixedly connected to the top of the first rotating column.

[0011] Preferably, the receiving assembly includes a second rotating column rotatably connected to the upper surface of the sodium replenishment operating table. A receiving roller is fixedly connected to the top of the second rotating column, and a rotating gear is fixedly connected to the outer surface of the second rotating column. A rotating connecting shaft is rotatably connected through the surface of the sodium replenishment operating table. A sector gear is fixedly connected to the top of the rotating connecting shaft, and the rotating gear meshes with the sector gear. A first pulley is fixedly connected to the bottom of the rotating connecting shaft. A servo motor is fixedly connected to the lower surface of the sodium replenishment operating table, and a second pulley is fixedly connected to the output shaft of the servo motor. The first pulley and the second pulley are connected by belt drive.

[0012] A method for sodium replenishment using a cold spray sodium replenishment device for sodium-ion battery negative electrode sheets, the method comprising the following steps: S1. The negative electrode sheet is wound on the unloading roller, then passes through the feed port and the discharge port, and is wound on the take-up roller; S2. After the negative electrode sheet roll enters the sodium coating box, open the valve on the sodium powder adding pipe so that the sodium powder in the sodium powder storage hopper enters the sodium powder entering pipe through the sodium powder adding pipe. Then start the cold air blower and the first air compressor. The cold air generated by the cold air blower enters the first air compressor through the cold air pipe. After the cold air is pressurized by the first air compressor, it is then transported to the sodium powder entering pipe through the first gas pipe. The high-pressure gas blows the sodium powder in the sodium powder entering pipe into the three sodium powder conveying pipes. S3. At the same time, start the second air compressor. The second air compressor sends high-pressure air into the gas output main pipe, and then enters the three sodium powder conveying pipes through three second gas pipes to pressurize and convey the sodium powder again. Finally, the sodium powder is sprayed out from multiple sodium powder spraying branch pipes along with the high-pressure gas, so that the sodium powder is sprayed onto the negative electrode sheet to replenish sodium. S4. Start the servo motor. The output shaft of the servo motor drives the second pulley to rotate, which in turn drives the rotary connecting shaft to rotate. The rotary connecting shaft drives the sector gear to rotate, and the sector gear drives the rotary gear to rotate, which in turn causes the take-up roller to rotate for intermittent winding. Beneficial effects

[0013] This invention provides a sodium-ion battery negative electrode cold spraying sodium replenishment device and method. It has the following beneficial effects: This invention involves starting a cooler and a first air compressor. The cool air generated by the cooler enters the first air compressor through a cooler duct. After being pressurized by the first air compressor, the cool air is then transported through a first gas pipeline to the sodium powder entry pipeline. The high-pressure gas blows the sodium powder into the three sodium powder delivery pipelines. Then, a second air compressor is started, which sends high-pressure air into the gas output main pipe. The air then enters the three sodium powder delivery pipelines through three second gas pipelines, further pressurizing and transporting the sodium powder. Finally, the sodium powder, along with the high-pressure gas, is ejected from multiple sodium powder ejection branch pipes, allowing the sodium powder to be sprayed onto the negative electrode plate for sodium replenishment, which is highly efficient and safe.

[0014] In this invention, the servo motor is started, and the output shaft of the servo motor rotates the second pulley, which in turn rotates the rotating connecting shaft. The rotating connecting shaft rotates the sector gear, which in turn rotates the rotating gear, ultimately causing the take-up roller to rotate for intermittent winding, providing sufficient time for sodium replenishment to the negative electrode sheet. Attached Figure Description

[0015] Figure 1 This is a first-view three-dimensional structural diagram of a sodium-ion battery negative electrode cold spray sodium replenishment device provided by the present invention; Figure 2 This is a second-view three-dimensional structural diagram of a sodium-ion battery negative electrode cold spray sodium replenishment device provided by the present invention; Figure 3 A front view of a sodium-ion battery negative electrode cold spraying sodium replenishment device provided by the present invention; Figure 4 A top view of a sodium-ion battery negative electrode cold spraying sodium replenishment device provided by the present invention; Figure 5 This is a schematic diagram of the sodium powder conveying pipeline structure of a sodium-ion battery negative electrode cold spraying sodium replenishment device provided by the present invention; Figure 6 This is a partial enlarged view (5-A) of a sodium-ion battery negative electrode cold spray sodium replenishment device provided by the present invention.

[0016] The components include: 1. Sodium replenishment operating table; 2. Sodium replenishment spray box; 3. Sodium powder conveying pipeline; 4. Sodium powder transfer pipeline; 5. Sodium powder spraying branch pipe; 6. Sodium powder inlet pipeline; 7. Sodium powder adding pipeline; 8. Sodium powder storage hopper; 9. Connecting mounting base; 10. Air cooler; 11. First air compressor; 12. First gas pipeline; 13. Second air compressor; 14. Gas output main pipe; 15. Second gas pipeline; 16. Discharge port; 17. First rotating column; 18. Feeding roller; 19. Receiving roller; 20. Rotary gear; 21. Servo motor; 22. Rotary connecting shaft; 23. Sector gear. Detailed Implementation

[0017] 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. Example

[0018] like Figures 1-6As shown, this embodiment of the invention provides a sodium-ion battery negative electrode sheet cold spraying sodium replenishment device, including a sodium replenishment operating table 1. A sodium replenishment spraying box 2 is fixedly connected to the upper surface of the sodium replenishment operating table 1. A feed inlet is opened on one side of the sodium replenishment spraying box 2, and a discharge outlet 16 is opened on the other side of the sodium replenishment spraying box 2. Three sodium powder conveying pipes 3 are fixedly connected through the front and rear sides of the sodium replenishment spraying box 2. A sodium powder transfer pipe 4 is fixedly connected to one end of each of the three sodium powder conveying pipes 3. Multiple sodium powder spray outlets are fixedly connected to one side of the sodium powder transfer pipe 4. Branch pipe 5 and the other ends of the three sodium powder conveying pipes 3 are fixedly connected to sodium powder inlet pipe 6. Three sets of feeding components are connected to the upper surface of sodium powder inlet pipe 6. The feeding components include sodium powder adding pipe 7 fixedly connected to the upper surface of sodium powder inlet pipe 6. Sodium powder storage hopper 8 is fixedly connected to the top of sodium powder adding pipe 7. A valve is installed on the outer surface of sodium powder adding pipe 7. When the valve on sodium powder adding pipe 7 is opened, sodium powder in sodium powder storage hopper 8 enters the interior of sodium powder inlet pipe 6 through sodium powder adding pipe 7. A first air supply assembly is installed on the side wall of the sodium replenishment workbench 1. The first air supply assembly includes a connecting mounting base 9 fixedly connected to one side of the sodium replenishment workbench 1. A cold air fan 10 and a first air compressor 11 are fixedly connected to the upper surface of the connecting mounting base 9. A cold air pipe is fixedly connected to the outlet of the cold air fan 10. The end of the cold air pipe away from the cold air fan 10 is fixedly connected to the inlet of the first air compressor 11. A first gas pipeline 12 is fixedly connected to the outlet of the first air compressor 11. The end of the first gas pipeline 12 away from the first air compressor 11 is fixedly connected to the sodium powder inlet pipeline 6. When the cold air fan 10 and the first air compressor 11 are started, the cold air generated by the cold air fan 10 enters the first air compressor 11 through the cold air pipe. After the cold air is pressurized by the first air compressor 11, it is then transported to the inside of the sodium powder inlet pipeline 6 through the first gas pipeline 12. The high-pressure gas blows the sodium powder inside the sodium powder inlet pipeline 6 into the inside of the three sodium powder conveying pipelines 3. Two sets of second air supply components are installed on the top of the sodium replenishment spraying box 2. The second air supply components include a second air compressor 13 fixedly connected to the top of the sodium replenishment spraying box 2. An air pipe is fixedly connected to the outlet of the second air compressor 13. A gas output main pipe 14 is fixedly connected to the end of the air pipe away from the second air compressor 13. Three second gas pipes 15 are fixedly connected to one side of the gas output main pipe 14. The end of the second gas pipe 15 away from the gas output main pipe 14 is fixedly connected to the corresponding sodium powder conveying pipe 3. A first one-way valve is installed on the outer surface of the sodium powder conveying pipe 3. A second one-way valve is installed on the outer surface of the second gas pipe 15. When the second air compressor 13 is started, the second air compressor 13 sends high-pressure air into the gas output main pipe 14, and then enters the three sodium powder conveying pipes 3 through the three second gas pipes 15 to pressurize and convey the sodium powder again. Finally, the sodium powder is sprayed out from multiple sodium powder spraying branch pipes 5 along with the high-pressure gas, so that the sodium powder is sprayed onto the negative electrode sheet to replenish sodium. A feeding assembly is installed on one side of the upper surface of the sodium replenishment operating table 1. The feeding assembly includes a first rotating column 17 rotatably connected to the upper surface of the sodium replenishment operating table 1, and a feeding roller 18 is fixedly connected to the top of the first rotating column 17. A receiving assembly is installed on the other side of the upper surface of the sodium replenishment operating table 1. The receiving assembly includes a second rotating column rotatably connected to the upper surface of the sodium replenishment operating table 1. A receiving roller 19 is fixedly connected to the top of the second rotating column. A rotating gear 20 is fixedly connected to the outer surface of the second rotating column. A rotating connecting shaft 22 is rotatably connected through the surface of the sodium replenishment operating table 1. A sector gear 23 is fixedly connected to the top of the rotating connecting shaft 22. The rotating gear 20 and the sector gear 23 are meshed together. A first pulley is fixedly connected to the bottom end of the rotating connecting shaft 22. A servo motor 21 is fixedly connected to the lower surface of the sodium replenishment operating table 1. A second pulley is fixedly connected to the output shaft of the servo motor 21. The first pulley and the second pulley are connected by belt drive. When the servo motor 21 is started, the output shaft of the servo motor 21 rotates the second pulley, thereby rotating the rotating connecting shaft 22. The rotating connecting shaft 22 rotates the sector gear 23, and the sector gear 23 rotates the rotating gear 20. Finally, the receiving roller 19 rotates to perform intermittent winding.

[0019] A method for sodium replenishment using a cold spray sodium replenishment device for sodium-ion battery negative electrode sheets, the method comprising the following steps: S1. The negative electrode sheet is wound on the unloading roller 18, then passes through the feed port and the discharge port 16, and is wound on the take-up roller 19. S2. After the negative electrode sheet roll enters the sodium coating box 2, the valve on the sodium powder adding pipe 7 is opened, so that the sodium powder in the sodium powder storage hopper 8 enters the sodium powder entering pipe 6 through the sodium powder adding pipe 7. Then, the cold air blower 10 and the first air compressor 11 are started. The cold air generated by the cold air blower 10 enters the first air compressor 11 through the cold air pipe. After the cold air is pressurized by the first air compressor 11, it is then transported to the sodium powder entering pipe 6 through the first gas pipe 12. The high-pressure gas blows the sodium powder in the sodium powder entering pipe 6 into the three sodium powder conveying pipes 3. S3. At the same time, the second air compressor 13 is started. The second air compressor 13 sends high-pressure air into the gas output main pipe 14, and then enters the three sodium powder conveying pipes 3 through the three second gas pipes 15 to pressurize and convey the sodium powder again. Finally, the sodium powder is sprayed out from the multiple sodium powder spraying branch pipes 5 along with the high-pressure gas, so that the sodium powder is sprayed onto the negative electrode sheet to replenish sodium. S4. Start the servo motor 21. The output shaft of the servo motor 21 rotates with the second pulley, which in turn rotates the rotating connecting shaft 22. The rotating connecting shaft 22 rotates the sector gear 23, which in turn rotates the rotating gear 20. Finally, the take-up roller 19 rotates to perform intermittent winding.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sodium-ion battery negative electrode cold spraying sodium replenishment device, comprising a sodium replenishment operating table (1), characterized in that: The sodium replenishment operating table (1) is fixedly connected to a sodium replenishment spray box (2). Three sodium powder conveying pipes (3) are fixedly connected through the front and rear sides of the sodium replenishment spray box (2). One end of each of the three sodium powder conveying pipes (3) is fixedly connected to a sodium powder transfer pipe (4). One side of the sodium powder transfer pipe (4) is fixedly connected to multiple sodium powder ejection branch pipes (5). The other end of the three sodium powder conveying pipes (3) is fixedly connected to a sodium powder inlet pipe (6). Three sets of feeding components are connected to the upper surface of the sodium powder inlet pipe (6). A first air supply component is installed on the side wall of the sodium replenishment operating table (1). Two sets of second air supply components are installed on the top of the sodium replenishment spray box (2). A discharge component is installed on one side of the upper surface of the sodium replenishment operating table (1). A receiving component is installed on the other side of the upper surface of the sodium replenishment operating table (1).

2. The sodium-ion battery negative electrode cold spraying sodium replenishment device according to claim 1, characterized in that: The feeding assembly includes a sodium powder adding pipe (7) fixedly connected to the upper surface of the sodium powder inlet pipe (6), a sodium powder storage hopper (8) fixedly connected to the top of the sodium powder adding pipe (7), and a valve installed on the outer surface of the sodium powder adding pipe (7).

3. The sodium-ion battery negative electrode cold spraying sodium replenishment device according to claim 2, characterized in that: The first gas supply assembly includes a connecting mounting base (9) fixedly connected to one side of the sodium replenishment operating table (1). A cooler (10) and a first air compressor (11) are fixedly connected to the upper surface of the connecting mounting base (9). A cooler pipe is fixedly connected to the outlet of the cooler (10). The end of the cooler pipe away from the cooler (10) is fixedly connected to the inlet of the first air compressor (11). A first gas pipe (12) is fixedly connected to the outlet of the first air compressor (11). The end of the first gas pipe (12) away from the first air compressor (11) is fixedly connected to the sodium powder inlet pipe (6).

4. The sodium-ion battery negative electrode cold spraying sodium replenishment device according to claim 3, characterized in that: The second air supply assembly includes a second air compressor (13) fixedly connected to the top of the sodium spraying box (2). An air pipe is fixedly connected to the outlet of the second air compressor (13). A gas output main pipe (14) is fixedly connected to one end of the air pipe away from the second air compressor (13). Three second gas pipes (15) are fixedly connected to one side of the gas output main pipe (14). The end of the second gas pipe (15) away from the gas output main pipe (14) is fixedly connected to the corresponding sodium powder conveying pipe (3). A first one-way valve is installed on the outer surface of the sodium powder conveying pipe (3). A second one-way valve is installed on the outer surface of the second gas pipe (15).

5. The sodium-ion battery negative electrode cold spraying sodium replenishment device according to claim 4, characterized in that: The sodium replenishing spray box (2) has an inlet on one side and an outlet (16) on the other side.

6. The sodium-ion battery negative electrode cold spraying sodium replenishment device according to claim 5, characterized in that: The feeding assembly includes a first rotating column (17) rotatably connected to the upper surface of the sodium replenishment operating table (1), and a feeding roller (18) is fixedly connected to the top of the first rotating column (17).

7. The sodium-ion battery negative electrode cold spraying sodium replenishment device and method according to claim 6, characterized in that: The receiving assembly includes a second rotating column rotatably connected to the upper surface of the sodium replenishment operating table (1). A receiving roller (19) is fixedly connected to the top of the second rotating column. A rotating gear (20) is fixedly connected to the outer surface of the second rotating column. A rotating connecting shaft (22) is rotatably connected through the surface of the sodium replenishment operating table (1). A sector gear (23) is fixedly connected to the top of the rotating connecting shaft (22). The rotating gear (20) meshes with the sector gear (23). A first pulley is fixedly connected to the bottom end of the rotating connecting shaft (22). A servo motor (21) is fixedly connected to the lower surface of the sodium replenishment operating table (1). A second pulley is fixedly connected to the output shaft of the servo motor (21). The first pulley and the second pulley are connected by belt drive.

8. The sodium replenishment method of the sodium-ion battery negative electrode cold spraying sodium replenishment device according to claim 7, characterized in that: The method includes the following steps: S1. The negative electrode sheet is wound on the unloading roller (18), and then passes through the feed port and the discharge port (16) and is wound on the take-up roller (19); S2. When the negative electrode sheet roll enters the sodium spraying box (2), open the valve on the sodium powder adding pipe (7) so that the sodium powder in the sodium powder storage hopper (8) enters the sodium powder entering pipe (6) through the sodium powder adding pipe (7). Then start the cold air blower (10) and the first air compressor (11). The cold air generated by the cold air blower (10) enters the first air compressor (11) through the cold air pipe. After the cold air is pressurized by the first air compressor (11), it is transported to the sodium powder entering pipe (6) through the first gas pipe (12). The high-pressure gas blows the sodium powder in the sodium powder entering pipe (6) into the three sodium powder conveying pipes (3). S3. At the same time, the second air compressor (13) is started. The second air compressor (13) sends high-pressure air into the gas output main pipe (14), and then enters the three sodium powder conveying pipes (3) through the three second gas pipes (15) to pressurize and convey the sodium powder again. Finally, the sodium powder is sprayed out from the multiple sodium powder spraying branch pipes (5) along with the high-pressure gas, so that the sodium powder is sprayed onto the negative electrode sheet to replenish sodium. S4. Start the servo motor (21). The output shaft of the servo motor (21) rotates with the second pulley, which in turn rotates the rotating connecting shaft (22). The rotating connecting shaft (22) rotates with the sector gear (23), and the sector gear (23) rotates with the rotating gear (20). Finally, the take-up roller (19) rotates to perform intermittent winding.

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