CN-122000410-A - Device and method for heat sealing and stacking of diaphragms

Abstract

Disclosed herein may be an apparatus and method for membrane heat sealing and stacking. The apparatus may include a continuous film supply unit configured to supply films in the form of continuous sheets, a heat sealing unit configured to heat-seal two films supplied from the continuous film supply unit, an electrode plate inserting unit configured to insert an electrode plate between the two films heat-sealed, and a cutting unit configured to cut the two films between which the electrode plate is inserted to produce a unit group.

Inventors

• JIN MINZHU
• JIN FUXUAN
• Zhao Zhenheng
• An Chengxun
• Jin Shanglv
• ZHENG MINRONG
• LIN XIUXIAN

Assignees

• 三星SDI株式会社
• 首尔大学校产学协力团

Dates

Publication Date

20260508

Application Date

20251104

Priority Date

20241107

Claims (20)

1. 1. An apparatus for heat sealing and stacking of diaphragms, comprising: A continuous diaphragm supply unit configured to supply a diaphragm in the form of a continuous sheet; A heat-sealing unit configured to heat-seal the two sheets of separator supplied from the continuous separator supply unit; An electrode plate inserting unit configured to insert an electrode plate between the two separator sheets that are heat-sealed, and A cutting unit configured to cut the two separators interposed therebetween to produce a cell group.
2. 2. The apparatus of claim 1, wherein the continuous membrane supply unit comprises: a roller unit configured to supply the separator in the form of the continuous sheet, and A conveyor belt configured to simultaneously receive the two diaphragms from the roller unit and convey the two diaphragms at the same speed.
3. 3. The apparatus of claim 1 wherein the heat seal unit comprises: a silicone rubber part; A heat seal provided on one side of the silicone rubber portion for forming a heat seal area on the two sheets of separator, and And a sealing motor configured to move the silicone rubber portion and the heat seal bar upward or downward.
4. 4. A device according to claim 3, Wherein the heat-seal unit comprises a first heat-seal unit and a second heat-seal unit, which are positioned consecutively and are each provided with the heat-seal strip in different areas, Wherein the first heat-seal unit is configured to form a first heat-seal land on one side of the two sheets of separator, and Wherein the second heat seal unit is configured to form a second heat seal area on the other side of the two sheets of separator.
5. 5. A device according to claim 3, wherein the heat seal bar is coated with a teflon material to prevent adhesion between the membrane and the heat seal bar.
6. 6. The apparatus of claim 4 wherein the electrode plate insertion unit is configured to insert a first electrode plate into the first heat seal zone and a second electrode plate into the second heat seal zone.
7. 7. The apparatus of claim 6 wherein the first and second electrode plates are inserted in opposite directions and aligned by contact with the first and second heat seal lands, respectively, during insertion.
8. 8. The apparatus of claim 1, wherein the cutting unit comprises: A cutter configured to cut the two diaphragms interposed between the electrode plates, and A cutting motor configured to move the cutter up or down.
9. 9. The apparatus of claim 1, further comprising a stacking unit configured to receive and stack the produced group of cells while aligning the produced group of cells.
10. 10. The apparatus of claim 9, wherein the stacking unit comprises: A stacking table configured to receive the produced unit group and to be inclined to allow the unit group to slide downward; a stopper configured to stop and align the unit group sliding downward, and And a stacking motor configured to move the stacking table upward or downward.
11. 11. A method for membrane heat sealing and stacking comprising: Supplying the separator in the form of a continuous sheet by a continuous separator supply unit; Heat-sealing the two sheets of separator supplied from the continuous separator supply unit by a heat-sealing unit; inserting an electrode plate between the two separator sheets heat-sealed by an electrode plate inserting unit, and The two separators interposed between the electrode plates are cut by a cutting unit to produce a cell group.
12. 12. The method of claim 11, wherein the supplying of the diaphragm comprises: supplying the diaphragm in the form of the continuous sheet by a roller unit of the continuous diaphragm supply unit, and The two diaphragms are simultaneously received from the roller unit by a conveyor belt of the continuous diaphragm supply unit, and are conveyed at the same speed.
13. 13. The method according to claim 11, Wherein the heat sealing unit comprises a silicone rubber part, a heat sealing strip provided on one side of the silicone rubber part, and a sealing motor, and Wherein the heat-sealing includes moving the silicone rubber portion and the heat-sealing bar upward or downward by the sealing motor, and forming heat-sealing lands on the two sheets of diaphragms by the heat-sealing bar.
14. 14. The method according to claim 13, Wherein the heat-seal unit comprises a first heat-seal unit and a second heat-seal unit which are positioned in succession and are each provided with the heat-seal strip in different regions, and Wherein the heat sealing comprises: Forming a first heat-seal land on one side of the two sheets of separator by the first heat-seal unit, and A second heat seal area is formed on the other side of the two sheets of separator by the second heat seal unit.
15. 15. The method of claim 13, further comprising coating the heat seal with a teflon material to prevent adhesion between the membrane and the heat seal.
16. 16. The method of claim 14, wherein the inserting of the electrode plate comprises: Inserting a first electrode plate into the first heat-seal land, and And inserting a second electrode plate into the second heat-seal zone.
17. 17. The method of claim 16, wherein the inserting of the first and second electrode plates comprises inserting the first and second electrode plates in opposite directions and aligning the first and second electrode plates by contact with the first and second heat seal lands, respectively, during insertion.
18. 18. The method of claim 11, wherein the cutting unit comprises a cutter and a cutting motor, and The production of the unit group includes moving the cutter up or down by the cutting motor, and cutting the two diaphragms interposed therebetween by the cutter.
19. 19. The method of claim 11, further comprising receiving and stacking the produced set of cells by stacking cells while aligning the produced set of cells.
20. 20. The method of claim 19, wherein the stacking unit includes a stacking table configured to receive the produced unit group and tilt to allow the unit group to slide downward, a stopper configured to stop and align the unit group sliding downward, and a stacking motor, and Wherein the receiving and stacking of the unit groups includes moving the stacking table up or down by the stacking motor.

Description

Device and method for heat sealing and stacking of diaphragms The present application claims priority and benefit from korean patent application No. 10-2024-0157526 filed at the korean intellectual property office on day 11 and 7 of 2024, the entire disclosure of which is incorporated herein by reference. Technical Field The present disclosure relates to an apparatus and method for heat sealing and stacking a separator, and more particularly, to an apparatus and method for heat sealing and stacking a separator, in which an electrode plate is in physical contact with a sealing portion through a guide wire formed by heat sealing, thereby being automatically aligned. Background Unlike primary batteries, which are not designed to be charged, secondary batteries are designed to be discharged and recharged. Low-capacity secondary batteries are used for portable small-sized electronic devices such as smart phones, function phones, notebook computers, digital cameras, and video cameras, while high-capacity secondary batteries are widely used for driving motors such as hybrid vehicles or electric vehicles and power sources for electric power storage. The secondary battery includes an electrode assembly including a positive electrode and a negative electrode, a case accommodating the electrode assembly, a terminal part connected to the electrode assembly, and the like. Such information is disclosed in the background section to enhance understanding of the background of the disclosure and, therefore, it may contain information that does not form a related (or prior) art. Disclosure of Invention Embodiments of the present disclosure are directed to an apparatus and method for heat sealing and stacking a separator, in which an electrode plate is in physical contact with a sealing portion through a guide wire formed by heat sealing, thereby being automatically aligned. However, technical problems to be solved by the present disclosure are not limited to the above problems, and other problems not mentioned herein and aspects and features of the present disclosure to be solved by the present disclosure will be clearly understood by those skilled in the art from the description of the present disclosure herein. An apparatus for heat sealing and stacking of diaphragms according to an embodiment of the present disclosure may include a continuous diaphragm supply unit configured to supply diaphragms in the form of continuous sheets, a heat sealing unit configured to heat seal two diaphragms supplied from the continuous diaphragm supply unit, an electrode plate inserting unit configured to insert an electrode plate between the two diaphragms that are heat sealed, and a cutting unit configured to cut the two diaphragms between which the electrode plate is inserted to produce a cell group. In an embodiment, the continuous membrane supply unit may include a roller unit configured to supply the membrane in the form of a continuous sheet, and a conveyor belt configured to simultaneously receive the membrane from the roller unit and convey the membrane at the same speed. In an embodiment, the heat sealing unit may include a silicone rubber part, a heat sealing bar provided on one side of the silicone rubber part to form a heat sealing region on the two sheets of the separator, and a sealing motor configured to move the silicone rubber part and the heat sealing bar upward or downward. The silicone rubber portion and the heat seal may provide uniform pressure to the diaphragm. In an embodiment, the heat sealing unit may comprise a first heat sealing unit and a second heat sealing unit, which are positioned consecutively and each provided with heat seals in different areas. The first heat sealing unit may be configured to form a first heat sealing region on one side of the two sheets of the separator, and the second heat sealing unit may be configured to form a second heat sealing region on the other side of the two sheets of the separator. In an embodiment, the heat seal may be coated with a teflon material to prevent adhesion between the membrane and the heat seal strip. In an embodiment, the electrode plate inserting unit may be configured to insert the first electrode plate into the first heat-seal lands and insert the second electrode plate into the second heat-seal lands. In an embodiment, the first and second electrode plates may be inserted in opposite directions and aligned by contact with the first and second heat seal lands, respectively, during insertion. In an embodiment, the cutting unit may include a cutter configured to cut two diaphragms with electrode plates interposed therebetween, and a cutting motor configured to move the cutter upward or downward. In an embodiment, an apparatus may include a stacking unit configured to receive and stack a produced group of cells and align the produced group of cells. In an embodiment, the stacking unit may include a stacking table configured to receive the produced unit group and t