An accordion-style temperature and pressure controlled flexible packaging formation device
By designing an accordion-style temperature and pressure controlled soft package formation equipment, and using a combination of heating elements, clamping components, and pressurizing components, the problem of long formation time caused by the inability to apply pressure to soft packages in existing technologies has been solved, achieving high efficiency and stability in the formation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACAD OF SCI
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-30
AI Technical Summary
Existing high-temperature formation cabinets cannot apply pressure to pouch lithium-ion capacitors, resulting in long formation times and reduced processing efficiency.
An accordion-style temperature and pressure controlled soft package forming device was designed. It adopts a combination of heating elements, clamping components and pressurizing components. Through the cooperation of clamping plates and springs, uniform pressure and temperature control of the soft package are achieved, ensuring that the temperature and pressure are within the optimal range during the forming process.
It improves the efficiency of the formation process, promotes the uniform formation of SEI film, reduces the damage of gas to the film structure, reduces the incidence of side reactions, and enhances the consistency and stability of formation.
Smart Images
Figure CN224437417U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of flexible packaging formation equipment, specifically to an accordion-style temperature and pressure controlled flexible packaging formation equipment. Background Technology
[0002] Lithium-ion capacitors are a new type of energy storage device that combines the high energy density of lithium-ion batteries with the high power density of supercapacitors, thus attracting widespread attention. Formation is a crucial step in the production process of lithium-ion capacitors. On one hand, the formation process fully activates the active materials in the positive and negative electrodes, allowing the lithium-ion capacitor to reach its optimal charge and discharge state. On the other hand, during the formation process, an SEI film (solid electrolyte interface film) is formed on the surface of the negative electrode while releasing gas. A good formation method can ensure that the active materials of the lithium-ion capacitor reach their optimal charge and discharge state, forming a uniform and stable SEI film, greatly reducing the occurrence of side reactions during subsequent charge and discharge processes. However, existing high-temperature formation cabinets cannot apply pressure to the pouch cells, resulting in long formation times and reduced processing efficiency. To address this issue, we propose an accordion-style temperature and pressure controlled pouch cell formation device. Utility Model Content
[0003] The present invention aims to provide an accordion-style temperature and pressure controlled soft packaging formation equipment to solve the problem that the existing high-temperature formation cabinet cannot apply pressure to the soft packaging, resulting in a long soft packaging formation time and reduced processing efficiency.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: an accordion-style temperature and pressure controlled soft-pack formation device, comprising a housing, a heat-conducting plate on the inner wall of the housing, dividing the housing into a formation zone and a heating zone, a plurality of heating elements in the heating zone, a clamping assembly and two sets of pressurizing assemblies in the formation zone, the two sets of pressurizing assemblies being symmetrically arranged on both sides of the formation zone, the clamping assembly being located between the two sets of pressurizing assemblies, the pressurizing assemblies being able to apply pressure to the clamping assembly, the clamping assembly including a support member and a plurality of clamping plates, the support member including two guide rails, the two guide rails being symmetrically arranged on the inner wall of the formation zone, the plurality of clamping plates being slidably installed between the two guide rails, springs being symmetrically arranged between two adjacent clamping plates, a limiting plate being provided at the lower end of two adjacent clamping plates, the limiting plate being able to support the lithium battery soft pack, and the two adjacent clamping plates being able to clamp the lithium battery soft pack, each clamping plate having a charging and discharging assembly on its side wall.
[0005] The beneficial effects of this solution are as follows: the heating element can raise the temperature of the heating zone, and then transfer the temperature to the formation zone through the heat conduction plate, ensuring that the electrolyte of the soft pack works within the optimal temperature range, thereby improving the fluidity of the electrolyte, enabling it to fully wet the electrode material, form a dense SEI film, and increase the cycle life of the cell. Each clamping plate can slide along the guide rail, and each adjacent clamping plate is equipped with a limiting plate at its lower end. The limiting plate supports the soft pack, preventing the soft pack from contacting the guide rail and causing friction as it moves with the clamping plate. Furthermore, the springs between adjacent clamping plates provide elastic buffering for the soft pack, ensuring stable clamping of soft packs of different thicknesses. The pressure components on both sides can apply pressure evenly to the clamping components, ensuring uniform pressure on the soft pack during the formation process, avoiding problems such as battery deformation or uneven SEI film caused by excessive or insufficient local force.
[0006] By coordinating the heating components, clamping components, and heating elements, operators can adjust the temperature and pressure during the formation process of the flexible package. This not only promotes the uniform formation of the SEI film and reduces gas damage to the membrane structure, but also shortens the formation time, reduces the incidence of side reactions, and significantly improves the consistency and stability of the flexible package formation.
[0007] Preferably, rollers are rotatably mounted on both sides of the lower end of each clamping plate, and both guide rails are concave, with the rollers slidably mounted in the corresponding guide rails.
[0008] Preferably, as an improvement, the charging and discharging assembly includes two conductive wires and several electrode clips. The two conductive wires are installed between the left and right inner walls of the formation zone. A power source is provided on the outer wall of the housing. One end of one conductive wire passes through the housing and is connected to the positive terminal of the power source, and one end of the other conductive wire passes through the housing and is connected to the negative terminal of the power source. Each clamping plate has a symmetrical conductive plate on its side wall, and the two conductive wires pass through the conductive plates located on the same horizontal line. Several electrode clips are respectively provided on the side wall of each conductive plate, and the electrode clips can hold the tabs of the soft package.
[0009] The beneficial effects are as follows: the electrode clips can quickly connect the tabs of the flexible package, eliminating the tedious wire soldering or plugging and unplugging steps. Operators can complete the circuit connection of multiple flexible packages in a short time, which greatly reduces the intensity of manual operation and time costs. By sliding the conductive wire through the conductive plate on the same horizontal line, and the conductive plate and conductive wire are always in contact during the movement of the clamping plate, a complete conductive link of "power supply-conductive wire-conductive plate-electrode clip-tab" is formed. This not only ensures the stable contact between the conductive plate and conductive wire during the pressurization process of flexible packages of different thicknesses, but also can adapt to the slight deformation of the flexible package caused by gas release during the formation process.
[0010] Preferably, as an improvement, a pressure sensor is provided between the two clamping plates located in the middle of the clamping assembly.
[0011] The beneficial effect is that the pressure sensor can accurately detect the pressure of the soft pack between the two clamping blocks in real time, which facilitates the accuracy of workers when pressurizing or depressurizing.
[0012] Preferably, as an improvement, the pressurizing assembly includes a driving member and an extrusion plate. The driving member is located on the side wall of the housing, and the output end of the driving member is located in the formation zone. The extrusion plate is located at the output end of the driving member, and the driving member can push the pressurizing plate to extend and retract. The extrusion plate has bosses at all four corners of the end near the clamping assembly, and the bosses can contact the clamping plate.
[0013] The beneficial effects are as follows: the driving component can push the extrusion plate to extend and retract, realizing dynamic adjustment of the pressure of the clamping component. The staff can accurately set the pressure parameters according to the specifications of the soft package and the formation process requirements, avoiding the problem of excessive pressure causing damage to the soft package or insufficient pressure affecting the formation of SEI film. The extrusion plate has protrusions at the four corners near the clamping component, and the protrusions can contact the clamping plate. Through point contact pressure transmission, the force of the driving component is concentrated on the key force points of the clamping plate, reducing pressure loss, and avoiding the problem of uneven force that may occur when the extrusion plate and the clamping plate are in full contact.
[0014] Preferably, the driving component is a hydraulic press.
[0015] Preferably, as an improvement, temperature sensors are provided at the four corners of the left and right inner walls of the formation zone.
[0016] The beneficial effects are: the four corner temperature sensors on the left and right inner walls of the formation zone can capture temperature data in the area from multiple directions, covering key locations such as the edges and corners of the formation zone, avoiding the limitations that may exist in single-point temperature measurement.
[0017] Preferably, the heating element is a heating tube.
[0018] Preferably, as an improvement, a door is hinged to the upper end of the housing, and cooling fans are symmetrically provided on the inner wall of the end of the housing away from the clamping assembly.
[0019] The beneficial effects are as follows: the hinged door can be opened and closed flexibly, and when closed, it can form a closed space in the formation zone, reducing the heat exchange between the formation zone and the external environment. At the same time, it can also increase the circulation of heat flow in the formation zone, improve the temperature uniformity of the formation zone, and enhance the stability of temperature control in conjunction with the heat conduction plate and heating element. It avoids local temperature fluctuations caused by external airflow interference. The symmetrically arranged cooling fans can quickly dissipate excess heat in the formation zone, forming a dynamic balance mechanism of "heating-heat dissipation" with the heating element. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural schematic diagram of the flexible packaging formation device according to an embodiment of the present invention;
[0021] Figure 2 This is a cross-sectional structural diagram of the flexible packaging formation equipment according to an embodiment of the present utility model;
[0022] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle. Detailed Implementation
[0023] The following detailed description illustrates the specific implementation method:
[0024] The reference numerals in the accompanying drawings include: 1. Box body; 2. Box door; 3. Heat-conducting plate; 4. Heating element; 5. Cooling fan; 6. Driving element; 7. Extrusion plate; 8. Boss; 9. Guide rail; 10. Clamping plate; 11. Roller; 12. Spring; 13. Limiting plate; 14. Pressure sensor; 15. Conductive wire; 16. Power supply; 17. Conductive plate; 18. Temperature sensor.
[0025] Example
[0026] The basic implementation examples are as follows: Figures 1-3 As shown, Figure 1 The accordion-style temperature and pressure controlled soft packaging forming equipment shown includes a housing 1. A door 2 is hinged to the upper end of the housing 1. A latching groove is provided on the front side of the upper end of the door 2 to facilitate the operator to open the door 2. Figure 2 The inner wall of the chamber 1 shown is fixedly equipped with a heat-conducting plate 3, which divides the chamber 1 into a formation zone and a heating zone from top to bottom. Several heating elements 4 are fixedly installed on the front and rear inner walls of the heating zone. The heating elements 4 are heating tubes. A cooling fan 5 is symmetrically fixedly installed at the rear end of the formation zone. The cooling fan 5 can quickly dissipate excess heat from the formation zone, forming a dynamic balance mechanism of "heating-heat dissipation" with the heating elements 4. The formation zone is equipped with clamping components and two sets of pressurizing components. Of course, the number of clamping components and corresponding pressurizing components can be increased according to the actual production needs. Each set of clamping components is separated by a partition. The two sets of pressurizing components are symmetrically arranged on the left and right side walls of the formation zone. The clamping assembly is located between two sets of pressurizing assemblies, and the pressurizing assemblies can apply pressure to the clamping assembly. The pressurizing assembly includes a driving component 6 and an extrusion plate 7. The driving component 6 is fixedly installed on the side wall of the housing 1, and the output end of the driving component 6 extends through the housing 1 into the formation zone. The driving component 6 is configured as a hydraulic press. The extrusion plate 7 is fixedly installed at the output end of the driving component 6, and the driving component 6 can push the pressurizing plate to extend and retract. Each of the four corners of one opposite end of the two extrusion plates 7 has a boss 8 fixedly installed, and the boss 8 can contact the clamping plate 10. The clamping assembly includes a support component and several clamping plates 10. The support component includes two guide rails 9, which are symmetrically fixedly installed between the left and right inner walls of the formation zone. Figure 3Rollers 11 are rotatably mounted on both the front and rear sides of the lower end of the clamping plate 10 shown. The cross-sections of the two guide rails 9 are both concave. The rollers 11 on the front and rear sides of each clamping plate 10 are slidably mounted within the corresponding guide rails 9. Springs 12 are symmetrically fixed between adjacent clamping plates 10. Adjacent clamping plates 10 can clamp the lithium battery pouch. Limiting plates 13 are fixedly mounted on the lower ends of adjacent clamping plates 10. The limiting plates 13 support the lithium battery pouch, preventing it from contacting the guide rails 9 and generating friction as it moves with the clamping plate 10. Furthermore, when pressure is applied to the pouch, the adjacent limiting plates 13 will not contact each other. Figure 2 As shown, a pressure sensor 14 is installed between the two clamping plates 10 in the middle of the clamping assembly. The pressure sensor 14 is set as a planar tension and compression sensor.
[0027] like Figure 2 Each clamping plate 10 shown has a charging / discharging assembly at its front end. The charging / discharging assembly includes two conductive wires 15 and several electrode clips. The two conductive wires 15 are fixedly installed between the left and right inner walls of the formation zone. A power supply 16 is fixedly installed on the outer wall of the left end of the housing 1. The left end of the upper conductive wire 15 passes through the housing 1 and connects to the positive terminal of the power supply 16, while the left end of the lower conductive wire 15 passes through the housing 1 and connects to the negative terminal of the power supply 16. Each clamping plate 10 has a conductive plate 17 symmetrically fixedly installed at its front end. Each conductive plate 17 has a through hole, and the through hole is rounded. In this embodiment, two conductive wires 15 slide through a through hole and pass through a conductive plate 17 located on the same horizontal line. The conductive plate 17 is always in contact with the conductive wires 15 during the movement. Several electrode clips are fixedly installed on the side wall of each conductive plate 17 (not shown in the figure). The electrode clips are made of pure copper, thus forming a complete conductive link of "power supply 16-conductive wire 15-conductive plate 17-electrode clip-tab". In this embodiment, the positive electrode of the lithium battery soft pack is connected to the electrode clip located above, and the negative electrode of the lithium battery soft pack is connected to the electrode clip located below.
[0028] Temperature sensors 18 are fixedly installed at the four corners of the left and right inner walls of the formation zone, enabling the device to capture temperature data in the area from multiple directions, covering key locations such as the edges and corners of the formation zone, and avoiding the limitations that may exist in single-point temperature measurement.
[0029] The specific implementation process is as follows:
[0030] When forming lithium battery pouches, the operator first opens the door 2, then places each lithium battery pouch between adjacent clamping plates 10 for clamping, ensuring the lower end of the pouch contacts the limiting plate 13 so that the lower end does not contact the guide rail 9. Next, the tabs of each pouch are connected to the corresponding electrode clips. In this embodiment, the positive electrode of the lithium battery pouch is connected to the upper electrode clip, and the negative electrode is connected to the lower electrode clip. After the tabs are connected, the door 2 is closed, creating a closed space in the formation area. The operator then raises the temperature of the heating area using the heating element 4, and transfers the temperature to the formation area through the heat-conducting plate 3. Inside, the electrolyte in the soft pack is kept within the optimal temperature range to improve its fluidity, allowing it to fully wet the electrode material and form a dense SEI film, thus increasing the cycle life of the cell. During the heating process of the formation zone, the operator can also push the extrusion plate 7 to squeeze the clamping assembly by activating the drive unit 6, so that the clamping plate 10 moves in the guide rail 9 under the action of the roller 11, thereby applying pressure to the lithium battery soft pack. At this time, the spring 12 is compressed under pressure and can provide elastic buffer for the soft pack, ensuring that uniform pressure is applied to the soft pack during the formation process, avoiding problems such as battery deformation or uneven SEI film caused by excessive or insufficient local force.
[0031] Through the cooperation of the heating components, clamping components, and heating element 4, the operator can adjust the temperature and pressure of the soft package during the formation process. This not only promotes the uniform formation of the SEI film and reduces the damage of gas to the film structure, but also shortens the formation time, reduces the incidence of side reactions, and significantly improves the consistency and stability of the soft package formation.
[0032] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An accordion-style temperature and pressure controlled flexible packaging formation device, characterized in that: The device includes a housing with a heat-conducting plate on the inner wall, dividing the housing into a formation zone and a heating zone. The heating zone contains several heating elements, while the formation zone contains a clamping assembly and two sets of pressurizing assemblies. The two sets of pressurizing assemblies are symmetrically arranged on both sides of the formation zone, and the clamping assembly is located between the two sets of pressurizing assemblies. The pressurizing assemblies can apply pressure to the clamping assembly. The clamping assembly includes a support member and several clamping plates. The support member includes two guide rails, which are symmetrically arranged on the inner wall of the formation zone. The clamping plates are slidably installed between the two guide rails. Springs are symmetrically arranged between two adjacent clamping plates. A limiting plate is provided at the lower end of two adjacent clamping plates. The limiting plate can support the lithium battery pouch, and the two adjacent clamping plates can clamp the lithium battery pouch. Each clamping plate has a charging and discharging assembly on its side wall.
2. The accordion-type temperature and pressure controlled soft packaging formation equipment according to claim 1, characterized in that: Each clamping plate has rollers rotatably mounted on both sides of its lower end, and both guide rails are concave, with the rollers slidably mounted within the corresponding guide rails.
3. The accordion-type temperature and pressure controlled soft packaging formation equipment according to claim 2, characterized in that: The charging and discharging assembly includes two conductive wires and several electrode clips. The two conductive wires are installed between the left and right inner walls of the formation zone. A power source is provided on the outer wall of the housing. One end of one conductive wire passes through the housing and is connected to the positive terminal of the power source, and one end of the other conductive wire passes through the housing and is connected to the negative terminal of the power source. Each clamping plate has a symmetrical conductive plate on its side wall, and the two conductive wires pass through the conductive plates located on the same horizontal line. Several electrode clips are respectively provided on the side wall of each conductive plate, and the electrode clips can hold the tabs of the soft package.
4. The accordion-type temperature and pressure controlled soft packaging formation equipment according to claim 3, characterized in that: A pressure sensor is located between the two clamping plates in the middle of the clamping assembly.
5. The accordion-type temperature and pressure controlled flexible packaging formation equipment according to claim 4, characterized in that: The pressurizing assembly includes a driving component and an extrusion plate. The driving component is located on the side wall of the housing, and the output end of the driving component is located in the formation zone. The extrusion plate is located at the output end of the driving component, and the driving component can push the pressurizing plate to extend and retract. The extrusion plate has bosses at all four corners of the end near the clamping assembly, and the bosses can contact the clamping plate.
6. The accordion-type temperature and pressure controlled soft packaging formation equipment according to claim 5, characterized in that: The driving component is a hydraulic press.
7. The accordion-type temperature and pressure controlled flexible packaging formation equipment according to claim 6, characterized in that: Temperature sensors are installed at the four corners of the inner walls on both sides of the formation zone.
8. The accordion-type temperature and pressure controlled soft packaging formation equipment according to claim 7, characterized in that: The heating element is a heating tube.
9. An accordion-type temperature and pressure controlled flexible packaging formation device according to claim 8, characterized in that: The top of the enclosure is hinged with a door, and cooling fans are symmetrically installed on the inner wall of the end of the enclosure away from the clamping components.