Constant-temperature drying oven for wet-process diaphragm processing
By designing a constant temperature drying oven and using fans and staggered air spray pipes to evenly dry the separator, the problem of uneven separator drying was solved, improving the separator drying speed and battery safety.
Patent Information
- Application Number
- CN202423094646.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-16
AI Technical Summary
Uneven temperature during separator drying can lead to excessively high local temperatures during stretching, which can easily create ultra-thin spots, increasing the risk of short circuits between the positive and negative electrodes of the battery and reducing battery safety.
Design a constant temperature drying oven for wet diaphragm processing, using a fan to deliver air through a distribution pipe, and staggered air spray pipes to spray out uniformly dried diaphragms, ensuring temperature uniformity.
It improves the drying speed and temperature uniformity of the separator, reduces the risk of short circuits between the positive and negative electrodes inside the battery, and enhances battery safety.
Smart Images
Figure CN223500037U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a constant temperature drying oven for wet-process separator processing, belonging to the field of lithium-ion battery technology. Background Technology
[0002] Lithium-ion batteries are rechargeable batteries that primarily function by the movement of lithium ions between the positive and negative electrodes. During charging and discharging, Li+ ions repeatedly insert and extract between the two electrodes: during charging, Li+ ions extract from the positive electrode, pass through the electrolyte, and insert into the negative electrode, leaving the negative electrode in a lithium-rich state; the reverse occurs during discharging. Lithium-ion batteries require a separator during manufacturing. Currently, the commercially available wet-process separator manufacturing process involves casting, longitudinal stretching, primary transverse stretching, extraction, secondary transverse stretching, and winding. In practical applications, the oil film undergoes extraction and drying followed by secondary transverse stretching for shaping. Key influencing factors during the separator stretching process include the stress field and temperature field. Uneven temperature distribution affects the effectiveness of the force during stretching; excessively high local temperatures increase the likelihood of stretching separation, creating ultra-thin points that can cause short circuits between the positive and negative electrodes when used inside the battery, reducing battery safety.
[0003] When processing the diaphragm, it is necessary to dry it at a low temperature, but the temperature is not uniform enough during the drying process.
[0004] This utility model proposes a new solution to the above problems. Utility Model Content
[0005] The main purpose of this invention is to solve the problem of uneven temperature during diaphragm drying, and to provide a constant temperature drying oven for wet diaphragm processing.
[0006] The objective of this utility model can be achieved by adopting the following technical solution:
[0007] A constant temperature drying oven for wet diaphragm processing includes a box body, guide rollers rotatably connected inside the box body, the guide rollers being evenly spaced and staggered inside the box body, a diaphragm body disposed on the guide rollers, a fan fixedly connected to the surface of the box body, a distributor pipe fixedly connected to the output end of the fan, a first connecting box and a second connecting box fixedly connected to the surface of the box body, and air spray pipes fixedly connected to the surfaces of both the first connecting box and the second connecting box, with air spray nozzles evenly spaced on the surface of the air spray pipes.
[0008] Preferably, the position of the air spray pipe is offset from that of the guide roller, and the air spray pipes are distributed at equal intervals.
[0009] Preferably, a first door is hinged to one side of the box body, and a first through hole is provided on the surface of the first door.
[0010] Preferably, the surface of the first door is provided with an entry groove, and a second door is hinged to the other side of the box body.
[0011] Preferably, the surface of the second box door is provided with a second through hole and a discharge groove.
[0012] Preferably, limit rods are inserted into the inner walls of both the first and second through holes, and insertion holes are provided on the surface of the housing at the locations of the first and second through holes.
[0013] Preferably, one end of the limiting rod is fixedly connected to a handle, and the surface of the handle is provided with anti-slip texture.
[0014] Preferably, the surface of the handle has a groove.
[0015] Preferably, the bottom of the box is fixedly connected to a support leg, and the surface of the support leg is fixedly connected to an anti-slip pad.
[0016] The beneficial technical effects of this utility model are as follows: the fan delivers air into the first and second connecting boxes through the diversion pipe, and the air is sprayed out from the air nozzle through the air spray pipe to dry the diaphragm body. The position of the air spray pipe is staggered from the guide roller, and the air spray pipes are evenly distributed to blow air on the diaphragm body at multiple points, thereby improving the drying speed of the diaphragm body and making the temperature more uniform during drying. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a constant temperature drying oven for wet diaphragm processing according to the present invention;
[0018] Figure 2 This is a schematic diagram of the internal structure of a constant temperature drying oven for wet diaphragm processing according to the present invention;
[0019] Figure 3 This is a flip view of the first connecting box and the second connecting box of a constant temperature drying oven for wet diaphragm processing according to the present invention;
[0020] Figure 4 This is a schematic diagram of the first door structure of a constant temperature drying oven for wet diaphragm processing according to the present invention;
[0021] Figure 5 This is a schematic diagram of the second door structure of a constant temperature drying oven for wet diaphragm processing according to the present invention;
[0022] Figure 6 This is a schematic diagram of the limiting rod structure of a constant temperature drying oven for wet diaphragm processing according to the present invention.
[0023] In the diagram: 1. Box body; 2. Guide roller; 3. Diaphragm body; 4. Fan; 5. Diverter pipe; 6. First connecting box; 7. Second connecting box; 8. Air spray pipe; 9. First box door; 10. First through hole; 11. Inlet trough; 12. Second box door; 13. Second through hole; 14. Outlet trough; 15. Handle; 16. Limiting rod; 17. Anti-slip texture; 18. Empty trough; 19. Support leg; 20. Anti-slip mat; 21. Air spray nozzle. Detailed Implementation
[0024] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.
[0025] like Figures 1-6 As shown in the figure, this embodiment provides a constant temperature drying oven for wet diaphragm processing, including a box body 1, a guide roller 2 rotatably connected inside the box body 1, the guide roller 2 being evenly spaced and staggered inside the box body 1, a diaphragm body 3 disposed on the guide roller 2, a fan 4 fixedly connected to the surface of the box body 1, a diverter pipe 5 fixedly connected to the output end of the fan 4, a first connecting box 6 and a second connecting box 7 fixedly connected to the surface of the box body 1, and air spray pipes 8 fixedly connected to the surfaces of both the first connecting box 6 and the second connecting box 7, with air spray nozzles 21 evenly spaced on the surface of the air spray pipes 8. The fan 4 delivers air to the interior of the first connecting box 6 and the second connecting box 7 through the diverter pipe 5, and the air is sprayed out from the air spray nozzles 21 through the air spray pipes 8 to dry the diaphragm body 3. The position of the air spray pipes 8 is staggered from the guide roller 2, and the air spray pipes 8 are evenly spaced, so as to blow air at multiple points on the diaphragm body 3, thereby improving the drying speed of the diaphragm body 3.
[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 5As shown, a first door 9 is hinged to one side of the box body 1. A first through hole 10 and an entry groove 11 are formed on the surface of the first door 9. A second door 12 is hinged to the other side of the box body 1. A second through hole 13 and a discharge groove 14 are formed on the surface of the second door 12. Limiting rods 16 are inserted into the inner walls of both the first through hole 10 and the second through hole 13. Insertion holes (conventional holes, not shown in the accompanying drawings) are provided on the surface of the box body 1 at the locations of the first and second through holes 10 and 13. A handle 15 is fixedly connected to one end of the limiting rod 16, allowing for easy removal of the limiting rod 16. The surface of the handle 15 is provided with anti-slip textures 17 for slip resistance. The texture 17 enhances the anti-slip ability of the handle 15. The surface of the handle 15 is provided with a groove 18, which reduces the weight of the handle 15. The bottom of the box 1 is fixedly connected to a support leg 19, and the surface of the support leg 19 is fixedly connected to an anti-slip pad 20. When the diaphragm body 3 is introduced into the box 1, the limiting rod 16 is first pulled out from the first through hole 10 and the second through hole 13 on the first box door 9 and the second box door 12 through the handle 15. Then the first box door 9 and the second box door 12 are opened to facilitate the introduction of the diaphragm body 3. The diaphragm body 3 is led out after passing through the guide roller 2. Then the first box door 9 and the second box door 12 are closed, and the limiting rod 16 is inserted into the first through hole 10 and the second through hole 13 on the first box door 9 and the second box door 12.
[0027] In this embodiment, as Figures 1-6 As shown in this embodiment, the working principle of a constant temperature drying oven for wet diaphragm processing is as follows:
[0028] First, pull the limiting rod 16 out of the first through hole 10 and the second through hole 13 on the first box door 9 and the second box door 12 through the handle 15. Then, open the first box door 9 and the second box door 12 to facilitate the introduction of the diaphragm body 3. After the diaphragm body 3 passes through the guide roller 2, it is led out. Then, close the first box door 9 and the second box door 12 and insert the limiting rod 16 into the first through hole 10 and the second through hole 13 on the first box door 9 and the second box door 12. The fan 4 delivers air to the interior of the first connecting box 6 and the second connecting box 7 through the diversion pipe 5. The air is sprayed out from the air nozzle 21 through the air spray pipe 8 to dry the diaphragm body 3. The position of the air spray pipe 8 is staggered from the guide roller 2 and the air spray pipes 8 are evenly distributed to blow air on the diaphragm body 3 at multiple points, thereby improving the drying speed of the diaphragm body 3.
[0029] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.
Claims
1. A constant temperature drying oven for wet diaphragm processing, comprising a chamber body (1), guide rollers (2) rotatably connected inside the chamber body (1), the guide rollers (2) being evenly spaced and staggered inside the chamber body (1), and a diaphragm body (3) disposed on the guide rollers (2), characterized in that, A fan (4) is fixedly connected to the surface of the housing (1), and a diverter pipe (5) is fixedly connected to the output end of the fan (4). A first connecting box (6) and a second connecting box (7) are fixedly connected to the surface of the housing (1). Air spray pipes (8) are fixedly connected to the surfaces of the first connecting box (6) and the second connecting box (7). Air spray nozzles (21) are evenly distributed on the surface of the air spray pipes (8).
2. The constant temperature drying oven for wet diaphragm processing as described in claim 1, characterized in that, The position of the air spray pipe (8) is offset from that of the guide roller (2), and the air spray pipes (8) are distributed at equal intervals.
3. The constant temperature drying oven for wet diaphragm processing as described in claim 1, characterized in that, A first door (9) is hinged to one side of the box body (1), and a first through hole (10) is provided on the surface of the first door (9).
4. The constant temperature drying oven for wet diaphragm processing as described in claim 3, characterized in that, The surface of the first door (9) is provided with an entry groove (11), and the other side of the box body (1) is hinged with a second door (12).
5. A constant temperature drying oven for wet diaphragm processing as described in claim 4, characterized in that, The surface of the second box door (12) is provided with a second through hole (13) and a discharge groove (14).
6. The constant temperature drying oven for wet diaphragm processing as described in claim 5, characterized in that, Limiting rods (16) are inserted into the inner walls of the first through hole (10) and the second through hole (13), and insertion holes are provided on the surface of the box body (1) at the first through hole (10) and the second through hole (13).
7. A constant temperature drying oven for wet diaphragm processing as described in claim 6, characterized in that, One end of the limiting rod (16) is fixedly connected to a handle (15), and the surface of the handle (15) is provided with anti-slip texture (17).
8. A constant temperature drying oven for wet diaphragm processing as described in claim 7, characterized in that, The surface of the handle (15) is provided with a groove (18).
9. A constant temperature drying oven for wet diaphragm processing as described in claim 1, characterized in that, The bottom of the box (1) is fixedly connected to a support leg (19), and the surface of the support leg (19) is fixedly connected to an anti-slip pad (20).