A forming device for a battery separator

Abstract

The utility model relates to a kind of forming device of battery diaphragm, can install rollstock base film on a take-up mechanism, and the one end of base film is passed through first membrane inlet, second membrane inlet, second membrane outlet, first membrane outlet one by one, subsequently connected with another take-up mechanism, subsequently operate two take-up mechanisms, make rollstock base film heat treatment under the cooperation of take-up mechanism, when heat treatment, operate heating element in inner box, make heating element heat the base film passing through inner box, while heat the air in inner box, in order to the thermal shock when base film enters inner box, it is not too big, can operate exhaust fan, so that inner box is exhausted to the temperature excess cavity by exhaust grid through heat through exhaust fan simultaneously, so that base film is preliminarily heated before entering inner box, after heat treatment is completed, base film moves to temperature excess cavity, and the residual heat of inner box exhaust in temperature excess cavity makes base film not cool too fast.

Description

Technical Field

[0001] This utility model relates to the field of battery separator manufacturing, and in particular to a battery separator forming device. Background Technology

[0002] The four key materials for lithium-ion batteries are positive electrode material, negative electrode material, electrolyte, and separator. The main function of the battery separator is to isolate the positive and negative electrodes and prevent electrons from passing through, while allowing ions to pass through, thereby completing the rapid transfer of lithium ions between the positive and negative electrodes during charging and discharging. The separator needs to be heat-treated during processing and forming.

[0003] In existing technologies, large box-type or tunnel-type ovens are often used to heat-treat the diaphragm. When the diaphragm is unwound and put into the oven, the temperature of the diaphragm rises rapidly. The excessively rapid thermal shock will prevent the molecular chains from relaxing in time. The outside will melt or shrink rapidly due to heat, while the internal stress has not been released, resulting in uneven shrinkage, deformation, or even perforation, which will affect the diaphragm forming quality. Utility Model Content

[0004] (a) Technical problems to be solved To address the aforementioned problems in the prior art, this utility model provides a battery separator forming device that can gradually increase the temperature during the separator heat treatment process in a more energy-efficient manner, reducing the impact of excessively rapid thermal shock on the separator quality, thereby enabling the separator to be formed better.

[0005] (II) Technical Solution To achieve the above objectives, the main technical solutions adopted by this utility model include: A battery separator forming apparatus includes a winding and unwinding mechanism, an outer box, an inner box, a heating element, and a heat dissipation assembly. The inner box is disposed in the middle of the outer box. A first film inlet is disposed at one end of the outer box, and a first film outlet is disposed at the other end of the outer box. A second film inlet is disposed at one end of the inner box, and a second film outlet is disposed at the other end of the inner box. The winding and unwinding mechanism is disposed below the outer side of both the first film inlet and the first film outlet. Heating elements are disposed at the top and bottom of the inner box. A plurality of heat dissipation ports are disposed on both sides of the second film inlet and the second film outlet, and a heat dissipation assembly is disposed on each of the heat dissipation ports. The space between the first membrane inlet and the second membrane inlet of the outer casing is configured as a heating transition chamber, and the space between the second membrane outlet and the first membrane outlet of the outer casing is configured as a cooling transition chamber. The heat dissipation assembly includes a heat dissipation grille and a heat dissipation fan. The heat dissipation grille is provided on the heat dissipation port, and the heat dissipation fan is connected to the heat dissipation port.

[0006] Furthermore, the take-up and unwinding mechanism includes a bracket, a rotation drive, and a take-up and unwinding roller. One side of the bracket is connected to the outside of the outer casing, and the take-up and unwinding roller is rotatably connected to the other side of the bracket. The rotation drive is driven by the take-up and unwinding roller.

[0007] Furthermore, it also includes a first thermometer, which is installed inside the inner box.

[0008] Furthermore, it also includes a second thermometer, with a second thermometer installed inside both the cooling transition cavity and the heating transition cavity.

[0009] Furthermore, the outer casing surface is also provided with a heat-insulating coating.

[0010] Furthermore, it also includes guide rollers, with one guide roller rotatably connected to the outer side of both the first film inlet and the first film outlet.

[0011] Furthermore, it also includes a PLC controller, which is electrically connected to the winding and unwinding mechanism, the heating element, and the heat dissipation assembly.

[0012] (III) Beneficial Effects

[0013] The beneficial effects of this utility model are as follows: In actual production and use, when a heat treatment step is required to form the battery separator, the roll base film can be installed on a take-up and unwinding mechanism, and one end of the base film can be passed through the first inlet, the second inlet, the second outlet, and the first outlet one by one, and then connected to another take-up and unwinding mechanism. The two take-up and unwinding mechanisms are then operated, allowing the roll base film to undergo heat treatment in cooperation with the take-up and unwinding mechanisms. During heat treatment, the heating element in the inner chamber is activated to heat the base film passing through the inner chamber, while simultaneously heating the air in the inner chamber. During heating, to prevent excessive thermal shock when the base membrane enters the inner chamber, a heat exhaust fan can be operated. This allows the heat from the inner chamber to be expelled through the heat exhaust grille into the heating transition chamber while the fan exhausts the air. This provides the base membrane with preliminary heating before entering the inner chamber. After heat treatment, the base membrane moves to the cooling transition chamber. The residual heat discharged from the inner chamber in the cooling transition chamber prevents the base membrane from cooling down too quickly. This allows for a more energy-efficient, gradual heating process during the diaphragm heat treatment, reducing the impact of rapid thermal shock on the diaphragm quality and enabling better diaphragm formation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the battery separator forming device according to an embodiment of the present invention.

[0015] Figure 2 This is a cross-sectional view of the overall structure of the battery separator forming apparatus according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the inner box of the battery separator forming device according to an embodiment of the present invention;

[0017] [Explanation of Labels in the Attached Image]

[0018] 1. Outer box; 2. Guide roller; 3. Bracket; 4. Take-up and untake-off roller; 5. Rotation drive component; 6. Door panel; 7. Second thermometer; 8. Insulation coating; 9. Heating transition cavity; 10. Heating component; 11. Inner box; 12. Cooling transition cavity; 13. First film outlet; 14. Second film outlet; 15. Exhaust fan; 16. First thermometer; 17. Second film inlet; 18. First film inlet; 19. Partition plate; 20. Exhaust grid. Detailed Implementation

[0019] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Please refer to Figures 1 to 3 As shown, a battery separator forming device of the present invention includes a winding and unwinding mechanism, an outer box 1, an inner box 11, a heating element 10, and a heat dissipation assembly. The inner box 11 is disposed in the middle of the outer box 1. A first film inlet 18 is disposed at one end of the outer box 1, and a first film outlet 13 is disposed at the other end of the outer box 1. A second film inlet 17 is disposed at one end of the inner box 11, and a second film outlet 14 is disposed at the other end of the inner box 11. A winding and unwinding mechanism is disposed below the outer side of both the first film inlet 18 and the first film outlet 13. Heating elements 10 are disposed at the top and bottom of the inner box 11. A plurality of heat dissipation ports are disposed on both sides of the second film inlet 17 and the second film outlet 14, and a heat dissipation assembly is disposed on each of the heat dissipation ports. The space between the first membrane inlet 18 and the second membrane inlet 17 of the outer casing 1 is configured as a heating transition chamber 9, and the space between the second membrane outlet 14 and the first membrane outlet 13 of the outer casing 1 is configured as a cooling transition chamber 12. The heat dissipation assembly includes a heat dissipation grille 20 and a heat dissipation fan 15. The heat dissipation grille 20 is provided on the heat dissipation port, and the heat dissipation fan 15 is connected to the heat dissipation port.

[0021] The working principle of this utility model is as follows: In actual production and use, when a heat treatment step is required to form the battery separator, the roll base film can be installed on a take-up and unwinding mechanism, and one end of the base film is passed through the first inlet 18, the second inlet 17, the second outlet 14, and the first outlet 13 one by one, and then connected to another take-up and unwinding mechanism. The two take-up and unwinding mechanisms are then operated, allowing the roll base film to undergo heat treatment in cooperation with the take-up and unwinding mechanisms. During heat treatment, the heating element 10 in the inner box 11 is activated, causing the heating element 1... The base film passing through the inner chamber 11 is heated, and the air in the inner chamber 11 is also heated. In order to prevent excessive thermal shock when the base film enters the inner chamber 11, the exhaust fan 15 can be operated so that the inner chamber 11 exhausts heat through the exhaust grille 20 to the heating transition chamber 9 while the exhaust fan 15 exhausts the heat. This allows the base film to be preheated before entering the inner chamber 11. After the heat treatment is completed, the base film moves to the cooling transition chamber 12. The residual heat discharged through the inner chamber 11 in the cooling transition chamber 12 prevents the base film from cooling too quickly.

[0022] Furthermore, the take-up and unwinding mechanism includes a bracket 3, a rotation drive 5, and a take-up and unwinding roller 4. One side of the bracket 3 is connected to the outside of the outer casing 1, and the take-up and unwinding roller 4 is rotatably connected to the other side of the bracket 3. The rotation drive 5 is drivenly connected to the take-up and unwinding roller 4.

[0023] As can be seen from the above description, when it is necessary to unwind or wind the roll base film, the roll base film can be installed with a take-up / unwind roller 4, and then the rotation drive 5 can be run to rotate the take-up / unwind roller 4 to achieve the purpose of unwinding. At the same time, one end of the base film can be connected to another take-up / unwind roller 4, and the take-up / unwind roller 4 can be rotated to wind it up.

[0024] Furthermore, it also includes a first thermometer 16, which is disposed inside the inner box 11.

[0025] As can be seen from the above description, it is beneficial to monitor the temperature of the inner chamber 11 through the first thermometer 16, so that after the temperature reaches a certain range, the excess temperature is discharged to the interior of the heating transition chamber 9 and the cooling transition chamber 12 by the heat dissipation fan 15.

[0026] Furthermore, it also includes a second thermometer 7, and a second thermometer 7 is provided inside both the cooling transition cavity 12 and the heating transition cavity 9.

[0027] As can be seen from the above description, it is beneficial to monitor the internal temperature of the heating transition cavity 9 and the cooling transition cavity 12 through the second thermometer 7, so that when the internal temperature of the heating transition cavity 9 and the cooling transition cavity 12 is insufficient, the heat dissipation fan 15 can be operated in time to raise the temperature.

[0028] Furthermore, the outer casing 1 is also provided with a heat-insulating coating 8.

[0029] As can be seen from the above description, it helps to reduce the rate of heat dissipation.

[0030] Furthermore, it also includes a guide roller 2, which is rotatably connected to the outer side of both the first film inlet 18 and the first film outlet 13.

[0031] As can be seen from the above description, it is beneficial for the base film to pass through the guide roller 2 and enter and exit the inner box 1 more effectively.

[0032] Furthermore, it also includes a PLC controller, which is electrically connected to the winding and unwinding mechanism, the heating element 10, and the heat dissipation assembly.

[0033] As can be seen from the above description, it is beneficial to adjust the parameters of the battery separator forming device through the PLC controller, and to make it more convenient for operators to operate the battery separator forming device.

[0034] Example 1

[0035] Please refer to Figures 1 to 3 A battery separator forming apparatus includes a winding and unwinding mechanism, an outer box 1, an inner box 11, a heating element 10, and a heat dissipation assembly. The inner box 11 is disposed in the middle of the outer box 1. A first film inlet 18 is disposed at one end of the outer box 1, and a first film outlet 13 is disposed at the other end of the outer box 1. A second film inlet 17 is disposed at one end of the inner box 11, and a second film outlet 14 is disposed at the other end of the inner box 11. The winding and unwinding mechanism is disposed below the outer side of both the first film inlet 18 and the first film outlet 13. The heating element 10 is disposed at the top and bottom of the inner box 11. A plurality of heat dissipation ports are disposed on both sides of the second film inlet 17 and the second film outlet 14, and the heat dissipation assembly is disposed on each of the heat dissipation ports. The exhaust fan 15 near the heating transition cavity 9 and the exhaust fan 15 near the cooling transition cavity 12 are separately controlled, which is beneficial to be able to operate the exhaust fans 15 on both sides according to the needs of the heating transition cavity 9 and the cooling transition cavity 12. The heating element 10 is an infrared heater; The space between the first membrane inlet 18 and the second membrane inlet 17 of the outer casing 1 is configured as a heating transition chamber 9, and the space between the second membrane outlet 14 and the first membrane outlet 13 of the outer casing 1 is configured as a cooling transition chamber 12. It also includes a partition 19, the upper and lower parts of the inner box 11 are connected to the inner surface of the outer box 1 through the partition 19, and the heating transition cavity 9 and the cooling transition cavity 12 are isolated by the partition 19. The heat dissipation assembly includes a heat dissipation grille 20 and a heat dissipation fan 15. The heat dissipation grille 20 is provided on the heat dissipation port, and the heat dissipation fan 15 is connected to the heat dissipation port. The take-up and unwinding mechanism includes a bracket 3, a rotation drive 5, and a take-up and unwinding roller 4. One side of the bracket 3 is connected to the outside of the outer box 1. The take-up and unwinding roller 4 is rotatably connected to the other side of the bracket 3 through a bearing. The rotation drive 5 is drivenly connected to the take-up and unwinding roller 4 through a coupling. The rotation drive component 5 is a geared motor; It also includes a first thermometer 16, which is installed inside the inner box 11; It also includes a second thermometer 7, and a second thermometer 7 is provided inside both the cooling transition cavity 12 and the heating transition cavity 9; The outer casing 1 is also provided with a heat-insulating coating 8; It also includes a guide roller 2, and the guide roller 2 is rotatably connected to the outer side of both the first film inlet 18 and the first film outlet 13; It also includes a door panel 6. Both the outer box 1 and the inner box 11 have an installation opening on one side, and the door panel 6 can be detached from the installation opening. It also includes a PLC controller, which is electrically connected to the winding and unwinding mechanism, the heating element 10 and the heat dissipation assembly respectively; The PLC controller is a Siemens SL-1500, and it is electrically connected to the first thermometer 16, the second thermometer 7, the heating element 10, the heat dissipation fan 15, and the rotation drive element 5.

[0036] The above describes the basic principles, main features, and advantages of this utility model. All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be detailed here.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A battery separator forming apparatus, characterized in that: The device includes a winding and unwinding mechanism, an outer box, an inner box, heating elements, and heat dissipation components. The inner box is located in the middle of the outer box. A first film inlet is located at one end of the outer box, and a first film outlet is located at the other end of the outer box. A second film inlet is located at one end of the inner box, and a second film outlet is located at the other end of the inner box. The winding and unwinding mechanism is located below the outer side of both the first film inlet and the first film outlet. Heating elements are located at the top and bottom of the inner box. Several heat dissipation ports are located on both sides of the second film inlet and the second film outlet, and heat dissipation components are located on each heat dissipation port. The space between the first membrane inlet and the second membrane inlet of the outer casing is configured as a heating transition chamber, and the space between the second membrane outlet and the first membrane outlet of the outer casing is configured as a cooling transition chamber. The heat dissipation assembly includes a heat dissipation grille and a heat dissipation fan. The heat dissipation grille is provided on the heat dissipation port, and the heat dissipation fan is connected to the heat dissipation port.

2. The battery separator forming apparatus as described in claim 1, characterized in that: The take-up and unwind mechanism includes a bracket, a rotation drive, and a take-up and unwind roller. One side of the bracket is connected to the outside of the outer casing, and the take-up and unwind roller is rotatably connected to the other side of the bracket. The rotation drive is driven by the take-up and unwind roller.

3. The battery separator forming apparatus as described in claim 1, characterized in that: It also includes a first thermometer, which is installed inside the inner box.

4. The battery separator forming apparatus as described in claim 1, characterized in that: It also includes a second thermometer, and a second thermometer is provided inside both the cooling transition cavity and the heating transition cavity.

5. The battery separator forming apparatus as described in claim 1, characterized in that: The outer casing surface is also provided with a heat-insulating coating.

6. The battery separator forming apparatus as described in claim 1, characterized in that: It also includes guide rollers, and each of the first film inlet and the first film outlet is rotatably connected to a guide roller.

7. The battery separator forming apparatus as described in claim 1, characterized in that: It also includes a PLC controller, which is electrically connected to the winding and unwinding mechanism, the heating element, and the heat dissipation assembly.

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