Vacuum sealing structure and battery cell baking equipment
By designing a vacuum sealing structure and guide rod, the problem of the heating plate being unable to move in a vacuum environment is solved, achieving efficient heating and stability of the battery cell baking equipment and improving the baking quality of the battery cells.
Patent Information
- Application Number
- CN202423109931.3
- 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
Existing battery cell baking equipment cannot achieve reciprocating movement of the heating plate in a vacuum environment, which affects baking efficiency and battery cell quality.
The system employs a vacuum-sealed structure, with the heating plate moving within the sealed cavity via a first driving component. A first guide rod connects to the heating plate, ensuring stable movement of the heating plate in a vacuum environment. Combined with a ceramic linear bearing and a bellows sealing structure, the system achieves both stability and sealing of the heating plate.
This technology enables stable movement of the heating plate in a vacuum environment, improving the efficiency and quality of cell baking and ensuring the stability and sealing of the heating process.
Smart Images
Figure CN223499969U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell baking technology, and in particular to a vacuum sealing structure and battery cell baking equipment. Background Technology
[0002] During the production of lithium-ion batteries, if moisture is present in the cell, the lithium ions react with the water to generate gas, leading to increased internal pressure and reduced effective capacity, thus affecting the cell's performance and safety. Therefore, cell baking equipment is needed to evaporate the moisture inside the cell to a safe level.
[0003] Currently, battery cell baking equipment uses contact heating plates to ensure uniform and effective heating of the cells. To achieve simultaneous heating and shaping, pressure is applied during heating. The heating plate is directly attached to the cell surface, utilizing the heat generated by the plate to process the cell. The heating plate not only provides the necessary heat energy but also ensures uniform heating of the cell during baking through pressure, thereby improving baking efficiency and cell quality. Furthermore, to enhance baking efficiency and quickly evaporate internal moisture, vacuuming is typically used during heating.
[0004] However, due to the low heating efficiency of the heating plate, and the fact that the heating plate needs to reciprocate continuously in a vacuum environment, traditional fixed structures or simple linear motion mechanisms cannot meet this complex requirement, thus failing to achieve the reciprocating movement of the heating plate in a vacuum environment, affecting baking efficiency and cell quality. Utility Model Content
[0005] The main purpose of this invention is to propose a vacuum sealing structure and a battery cell baking device, which aims to realize the reciprocating movement of the heating plate in a vacuum environment and improve the battery cell baking efficiency.
[0006] To achieve the above objectives, this utility model proposes a vacuum sealing structure, which includes:
[0007] The housing includes a sealed cavity and a first guide hole communicating with the sealed cavity. The outer wall of the housing also has a first sealing cylinder, which forms a sealed movable cavity communicating with the first guide hole.
[0008] A heating mechanism is provided in the housing and includes a first driving member, a heating plate, and a first guide rod. The first driving member is located in the housing, the heating plate is located in the sealed cavity and connected to the output end of the first driving member, and the heating plate is used to heat the battery cell in the sealed cavity. One end of the first guide rod is connected to the heating plate, and the other end of the first guide rod moves through the first guide hole and extends into the sealed movable cavity.
[0009] The first driving member drives the heating plate closer to the battery cell and moves the first guide rod along the first guide hole.
[0010] In one embodiment, the first sealing cylinder is mounted on the first guide hole via a first flange.
[0011] In one embodiment, a linear bearing is provided inside the sealed movable cavity. The linear bearing is installed on the first flange and is coaxially arranged with the first flange. The first guide rod movably passes through the inner ring of the linear bearing.
[0012] In one embodiment, the linear bearing is made of ceramic.
[0013] In one embodiment, a sealing ring is provided at the connection of the first flange.
[0014] In one embodiment, the housing is further provided with a first drive hole communicating with the sealing cavity, and the heating mechanism further includes a first mounting base and a second sealing cylinder. The first mounting base is disposed on the housing and corresponds to the first drive hole, and the second sealing cylinder is disposed on the first mounting base. The second sealing cylinder forms a downward transmission cavity communicating with the first drive hole.
[0015] The output end of the first driving member is provided with a first transmission shaft. One end of the first transmission shaft passes through the pressing transmission cavity and the first driving hole in sequence, extends into the sealing cavity, and is connected to the heating plate.
[0016] The first driving component drives the first transmission shaft, thereby moving the heating plate.
[0017] In one embodiment, the output end of the first driving member is connected to the second sealing cylinder via a second flange, the second sealing cylinder being a bellows, and the first driving member drives the bellows to compress or extend.
[0018] In one embodiment, a plurality of first guide holes are provided, and the plurality of first guide holes are arranged in a ring around the first drive hole. A plurality of first guide rods are also provided, and each first guide rod corresponds to a first guide hole.
[0019] In one embodiment, the heating plate is provided with a first electromagnetic coil, which generates a first alternating magnetic field to heat the battery cell.
[0020] This utility model also proposes a battery cell baking device, which includes the above-mentioned vacuum sealing structure.
[0021] The technical solution of this utility model uses a first driving component to directly drive the heating plate to move within the sealed cavity to heat the battery cell. At the same time, a first guide rod is connected to the heating plate to assist in the stable movement of the heating plate and prevent shaking. Furthermore, the first guide rod moves within a sealed movable cavity in a vacuum environment, thereby effectively ensuring the stability and sealing of the heating process. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0023] Figure 1 A schematic diagram of an embodiment of the vacuum sealing structure provided by this utility model;
[0024] Figure 2 for Figure 1 Schematic diagram of the middle box structure;
[0025] Figure 3 for Figure 1 Schematic diagram of the heating mechanism;
[0026] Figure 4 for Figure 1 Another structural schematic diagram of the heating mechanism;
[0027] Figure 5 for Figure 4 Schematic diagram of the structure of section AA in the middle;
[0028] Figure 6 for Figure 3 A schematic diagram of the structure of the heating plate.
[0029] Explanation of icon numbers:
[0030] 100. Vacuum sealing structure; 1. Housing; 11. Sealing cavity; 12. First guide hole; 121. First sealing cylinder; 122. Sealing movable cavity; 123. First flange; 1231. Sealing ring; 13. First drive hole; 2. Heating mechanism; 21. First drive component; 211. First transmission shaft; 212. Second flange; 22. Heating plate; 221. First electromagnetic coil; 222. First plate; 223. Second plate; 224. Mounting cavity; 23. First guide rod; 24. Linear bearing; 25. First mounting base; 26. Second sealing cylinder; 261. Downward transmission cavity; 200. Battery cell baking equipment.
[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0035] During the production of lithium-ion batteries, if moisture is present in the cell, the lithium ions react with the water to generate gas, leading to increased internal pressure and reduced effective capacity, thus affecting the cell's performance and safety. Therefore, cell baking equipment is needed to evaporate the moisture inside the cell to a safe level.
[0036] Currently, battery cell baking equipment uses contact heating plates to ensure uniform and effective heating of the cells. To achieve simultaneous heating and shaping, pressure is applied during heating. The heating plate is directly attached to the cell surface, utilizing the heat generated by the plate to process the cell. The heating plate not only provides the necessary heat energy but also ensures uniform heating of the cell during baking through pressure, thereby improving baking efficiency and cell quality. Furthermore, to enhance baking efficiency and quickly evaporate internal moisture, vacuuming is typically used during heating.
[0037] However, due to the low heating efficiency of the heating plate, and the fact that the heating plate needs to reciprocate continuously in a vacuum environment, traditional fixed structures or simple linear motion mechanisms cannot meet this complex requirement, thus failing to achieve the reciprocating movement of the heating plate in a vacuum environment, affecting baking efficiency and cell quality.
[0038] The main purpose of this utility model is to propose a vacuum sealing structure 100 and a battery cell baking device 200, which aims to realize the reciprocating movement of the heating plate 22 in a vacuum environment.
[0039] Please see Figures 1 to 6 In one embodiment of this utility model, the vacuum sealing structure 100 includes a housing 1 and a heating mechanism 2. The housing 1 is provided with a sealing cavity 11 and a first guide hole 12 communicating with the sealing cavity 11. The outer wall of the housing 1 is also provided with a first sealing cylinder 121, and the first sealing cylinder 121 and the housing 1 form a sealed movable cavity 122 communicating with the first guide hole 12. The heating mechanism 2 is disposed in the housing 1 and includes a first driving member 21, a heating plate 22 and a first guide rod 23. The first driving member 21 is disposed in the housing 1, the heating plate 22 is located in the sealing cavity 11 and is connected to the output end of the first driving member 21. The heating plate 22 is used to heat the battery cell in the sealing cavity 11. One end of the first guide rod 23 is connected to the heating plate 22, and the other end of the first guide rod 23 moves through the first guide hole 12 and extends into the sealed movable cavity 122. The first driving member 21 drives the heating plate 22 to approach the battery cell and drives the first guide rod 23 to move along the first guide hole 12.
[0040] The technical solution of this utility model uses the first driving member 21 to directly drive the heating plate 22 to move within the sealed cavity 11 to heat the battery cell. At the same time, the first guide rod 23 is connected to the heating plate 22 to assist the heating plate 22 in moving stably and avoid shaking. Furthermore, the first guide rod 23 moves within the sealed movable cavity 122 in a vacuum environment, thereby effectively ensuring the stability and sealing of the heating process.
[0041] Please see Figure 3 In one embodiment, the first sealing cylinder 121 is installed in the first guide hole 12 via the first flange 123.
[0042] In this embodiment, the first sealing cylinder 121 is installed in the first guide hole 12 through the first flange 123, thereby ensuring that the first sealing cylinder 121 can be stably connected to the housing 1 and ensuring the vacuum environment of the sealing cavity 11.
[0043] Understandably, if the first guide rod 23 is directly disposed on the inner ring of the first flange 123, then a certain gap must be left between the first guide rod 23 and the inner ring of the first flange 123 in order for the first guide rod 23 to move. However, when there is a gap, since there is no circumferential limit on the first guide rod, the first guide rod 23 is prone to wobbling when it moves along the axial direction, which will still cause the heating plate 22 to wobble.
[0044] Please see Figures 3 to 5 To solve the above problems, in one embodiment, a linear bearing 24 is provided in the sealed movable cavity 122. The linear bearing 24 is installed on the first flange 123 and is coaxially arranged with the first flange 123. The first guide rod 23 is movably inserted through the inner ring of the linear bearing 24.
[0045] Understandably, a linear bearing 24 is provided in the inner ring of the first flange 123, and the first guide rod 23 is movably inserted through the inner ring of the linear bearing 24. The limiting effect of the linear bearing 24 can prevent the first guide rod 23 from shaking.
[0046] In one embodiment, the linear bearing 24 is made of ceramic.
[0047] Alternatively, the linear bearing 24 may be made of ceramic material due to its wear resistance and high temperature stability.
[0048] In one embodiment, a sealing ring 1231 is provided at the connection of the first flange 123.
[0049] Optionally, a sealing ring 1231 is provided at the connection of the first flange 123 to improve the sealing performance and ensure the vacuum environment of the sealing cavity 11. The sealing ring 1231 can be made of rubber, silicone, etc.
[0050] Please see Figures 1 to 3 In one embodiment, the housing 1 is further provided with a first drive hole 13 communicating with the sealing cavity 11. The heating mechanism 2 also includes a first mounting base 25 and a second sealing cylinder 26. The first mounting base 25 is disposed on the housing 1 and corresponds to the first drive hole 13. The second sealing cylinder 26 is disposed on the first mounting base 25 and forms a downward transmission cavity 261 communicating with the first drive hole 13. The output end of the first driving member 21 is provided with a first transmission shaft 211. One end of the first transmission shaft 211 passes through the downward transmission cavity 261 and the first drive hole 13 in sequence, extends into the sealing cavity 11, and is connected to the heating plate 22. The first driving member 21 drives the first transmission shaft 211, thereby moving the heating plate 22.
[0051] In this embodiment, one end of the second sealing cylinder 26 is fixed to the housing 1 and corresponds to the first driving hole 13, forming a downward transmission cavity 261 communicating with the first driving hole 13. The first driving member 21 is mounted on the first mounting base 25. The first drive shaft 211 of the first driving member 21 extends into the sealing cavity 11 through the downward transmission cavity 261 and the first driving hole 13, and is connected to the heating plate 22. The downward transmission cavity 261 can effectively prevent gas leakage from the first drive shaft 211 during movement, thereby destroying the vacuum environment of the sealing cavity 11. The first driving member 21 may be an electric motor, a pneumatic cylinder, or a hydraulic cylinder.
[0052] Understandably, when the first driving member 21 drives the first transmission shaft 211 to move, the output end of the first driving member 21 will also move relative to the lower transmission cavity 261. In order to ensure the gas sealing at the connection, the conventional approach is to place the first driving member 21 in the lower transmission cavity 261 and use the second sealing cylinder 26 to completely cover the first driving member 21. However, this will result in a large volume of the second sealing cylinder 26.
[0053] Please see Figures 3 to 5 To solve the above problems, in one embodiment, the output end of the first driving member 21 is connected to the second sealing cylinder 26 through the second flange 212. The second sealing cylinder 26 is a bellows, and the first driving member 21 drives the bellows to compress or extend.
[0054] Understandably, the second sealing cylinder 26 is a bellows. The end of the bellows away from the first driving hole 13 is connected to the output end of the first driving member 21 through the second flange 212. Thus, when the first driving member 21 drives the first transmission shaft 211 to move, it will simultaneously drive the bellows to compress or extend, causing the downward transmission cavity 261 to shorten or extend accordingly. The first driving member 21 seals one end of the downward transmission cavity 261, thereby solving the airtightness problem.
[0055] In one embodiment, a plurality of first guide holes 12 are provided, and the plurality of first guide holes 12 are arranged in a ring around the first drive hole 13. A plurality of first guide rods 23 are also provided, and each first guide rod 23 corresponds to a first guide hole 12.
[0056] In this embodiment, four first guide holes 12 are provided in a cross shape. The first drive hole 13 is located at the center of the four first guide holes 12. Each guide hole is provided with a first guide rod 23. The first guide shaft is mounted on the mounting base plate and surrounds the first drive shaft 211, thereby ensuring that the heating plate 22 can move stably.
[0057] In one embodiment, the heating plate 22 is provided with a first electromagnetic coil 221, which generates a first alternating magnetic field to heat the battery cell.
[0058] In this embodiment, the heating plate 22 is provided with a first electromagnetic coil 221. When the first electromagnetic coil 221 is energized, it generates a first alternating magnetic field. The first alternating magnetic field cuts the battery cell, thereby converting electrical energy into heat energy and realizing rapid heating and drying of the battery cell.
[0059] Please see Figure 6 In one embodiment, the heating plate 22 includes a first plate 222 and a second plate 223 connected to each other, and a mounting cavity 224 is formed between the first plate 222 and the second plate 223. The first electromagnetic coil 221 is laid in the mounting cavity 224.
[0060] In this embodiment, to avoid the first electromagnetic coil 221 being directly pressed, the heating plate 22 is provided with a first plate 222 and a second plate 223 connected to each other. The first electromagnetic coil 221 is placed between the first plate 222 and the second plate 223. The first plate 222 and the second plate 223 can be made of materials with excellent insulation properties to reduce the impact on electromagnetic induction, such as insulating ceramics.
[0061] Understandably, the first electromagnetic coil 221 is laid in the mounting cavity 224. The first electromagnetic coil 221 is first wound to form a loop, which can be circular, elliptical or rectangular, and then placed in the mounting cavity 224.
[0062] Please see Figure 1 This utility model also proposes a battery cell baking device 200, which includes a vacuum sealing structure 100. The specific structure of the vacuum sealing structure 100 is as described in the above embodiments. Since this battery cell baking device 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0063] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A vacuum sealing structure, characterized in that, The vacuum sealing structure includes: The housing includes a sealed cavity and a first guide hole communicating with the sealed cavity. The outer wall of the housing also has a first sealing cylinder, which forms a sealed movable cavity communicating with the first guide hole. A heating mechanism is provided in the housing and includes a first driving member, a heating plate, and a first guide rod. The first driving member is located in the housing, the heating plate is located in the sealed cavity and connected to the output end of the first driving member, and the heating plate is used to heat the battery cell in the sealed cavity. One end of the first guide rod is connected to the heating plate, and the other end of the first guide rod moves through the first guide hole and extends into the sealed movable cavity. The first driving member drives the heating plate closer to the battery cell and moves the first guide rod along the first guide hole.
2. The vacuum sealing structure as described in claim 1, characterized in that, The first sealing cylinder is installed in the first guide hole via the first flange.
3. The vacuum sealing structure as described in claim 2, characterized in that, A linear bearing is provided inside the sealed movable cavity. The linear bearing is installed on the first flange and is coaxially arranged with the first flange. The first guide rod is movably inserted through the inner ring of the linear bearing.
4. The vacuum sealing structure as described in claim 3, characterized in that, The linear bearing is made of ceramic.
5. The vacuum sealing structure as described in claim 2, characterized in that, A sealing ring is provided at the connection of the first flange.
6. The vacuum sealing structure as described in any one of claims 1 to 5, characterized in that, The housing is also provided with a first drive hole communicating with the sealing cavity. The heating mechanism also includes a first mounting base and a second sealing cylinder. The first mounting base is provided on the housing and corresponds to the first drive hole. The second sealing cylinder is provided on the first mounting base and forms a downward transmission cavity communicating with the first drive hole. The output end of the first driving member is provided with a first transmission shaft. One end of the first transmission shaft passes through the pressing transmission cavity and the first driving hole in sequence, extends into the sealing cavity, and is connected to the heating plate. The first driving component drives the first transmission shaft, thereby moving the heating plate.
7. The vacuum sealing structure as described in claim 6, characterized in that, The output end of the first driving component is connected to the second sealing cylinder through a second flange. The second sealing cylinder is a bellows. The first driving component drives the bellows to compress or extend.
8. The vacuum sealing structure as described in claim 6, characterized in that, The first guide hole is provided in multiple ways, and the multiple first guide holes are arranged in a ring around the first drive hole. The first guide rod is also provided in multiple ways, and each first guide rod corresponds to a first guide hole.
9. The vacuum sealing structure as described in claim 1, characterized in that, The heating plate is equipped with a first electromagnetic coil, which generates a first alternating magnetic field to heat the battery cell.
10. A battery cell baking device, characterized in that, The cell baking equipment includes the vacuum sealing structure as described in any one of claims 1 to 9.