CN211654975U - Lithium-sulfur battery bag-making and laminating device - Google Patents
Lithium-sulfur battery bag-making and laminating device Download PDFInfo
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- CN211654975U CN211654975U CN202020132718.7U CN202020132718U CN211654975U CN 211654975 U CN211654975 U CN 211654975U CN 202020132718 U CN202020132718 U CN 202020132718U CN 211654975 U CN211654975 U CN 211654975U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a lithium sulfur battery bag-making and laminating device, which comprises a lithium belt conveying unit, a pole lug cold rolling unit, a diaphragm welding unit, a folding unit and a cutting unit; the lithium belt transmission unit, the lug cold rolling unit and the diaphragm welding unit are sequentially arranged; a folding unit is arranged below the diaphragm welding unit and comprises a tension controller, a pendulum and a metal fork, wherein the tension controller comprises a rope and a hammer head; the pendulum bob comprises a rope and a hammer head, one end of the pendulum bob rope is fixed below the tension controller and does not interfere with the hammer head of the tension controller, the other end of the pendulum bob rope is fixed with the pendulum bob hammer head, and a gap for penetrating and wrapping a bag body of the lithium belt is formed in the pendulum bob hammer head; the metal fork is connected with a metal fork driving device; the cutting unit comprises a cutter, a traction clamping piece and an adhesive tape. The utility model discloses lithium sulphur battery system bag lamination method has saved lithium area cross cutting pole piece process to make the automatic lamination of lithium piece become for probably.
Description
Technical Field
The utility model relates to a lithium sulphur battery preparation technique especially relates to a lithium sulphur battery system bag lamination device.
Background
With the development of modern society, the application of lithium batteries is more and more extensive, wherein lithium sulfur batteries are more and more concerned by people as high energy density batteries. The lithium-sulfur battery is a lithium battery with sulfur as the positive electrode and metal lithium as the negative electrode. The specific capacity of the lithium cobaltate lithium battery reaches 1675mAh/g, which is far higher than the capacity (<150mAh/g) of the lithium cobaltate battery widely used in commerce. And the sulfur which is used as the main component of the battery anode material is an element which is friendly to the environment, and basically has no pollution to the environment. In summary, lithium sulfur batteries are a very promising lithium battery.
The main materials in lithium sulfur batteries are: sulfur (positive electrode material), lithium (negative electrode material), separator, aluminum plastic film, tab, electrolyte, and the like. The manufacturing process of the lithium-sulfur battery cell mainly comprises the following steps: die cutting positive and negative pole pieces, laminating (stacking a positive pole material, a diaphragm and a negative pole material together), welding (welding a current collector), packaging (packaging an electric core by an aluminum plastic film), injecting liquid (injecting electrolyte), vacuumizing and the like. In the lamination process, generally, positive and negative electrode sheets are laminated with a separator interposed therebetween ("zigzag lamination") to form a pouch battery, as shown in fig. 1.
The current lithium sulfur battery lamination method is as follows: before lamination, the positive and negative pole pieces are required to be subjected to die cutting, and then manual lamination is carried out. In the lamination process, lamination is generally performed with the positive electrode sheet 1 and the negative electrode sheet 3 being sandwiched with the separator 2 therebetween ("zigzag lamination") to produce a pouch battery, as shown in fig. 1. The problems of the existing lamination method are as follows: the lithium metal can not be automatically produced and processed, and the thinner the lithium metal is, the more difficult the lithium metal is to be processed, manual die cutting is needed, and the production efficiency is extremely low. When the negative plate subjected to manual die cutting and the automatic lamination are used for matched production, the production efficiency is low, the processing precision is poor, and the rejection rate is high; when the pure manual lamination is adopted, the process is complex, the production efficiency is low, and the industrial batch production cannot be realized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lithium sulphur battery system bag lamination device to the problem that the existence inefficiency of present lithium sulphur battery cross cutting, lamination method different degree, rejection rate height and precision are poor, adopt the device preparation folding electric core, saved lithium area cross cutting pole piece process to make the automatic lamination of lithium piece become for probably.
In order to achieve the purpose, the utility model discloses a lithium sulfur battery bag-making and laminating device, which comprises a lithium belt conveying unit, a pole lug cold rolling unit, a diaphragm welding unit, a folding unit and a cutting unit; the lithium belt conveying unit, the lug cold rolling unit and the diaphragm welding unit are sequentially arranged, a folding unit is arranged below the diaphragm welding unit and comprises a tension controller, a pendulum bob and a metal fork, the tension controller comprises a rope and a hammer head, one end of the tension controller rope is fixed below an outlet of the diaphragm welding unit, the other end of the tension controller rope is fixed with the hammer head of the tension controller, and a gap for penetrating and wrapping a bag body of the lithium belt is formed in the hammer head of the tension controller; the lithium battery charging device comprises a tension controller, a pendulum bob, a lithium belt and a battery, wherein the pendulum bob comprises a rope and a hammer head, one end of the pendulum bob rope is fixed below the tension controller and does not interfere with the hammer head of the tension controller, the other end of the pendulum bob rope is fixed with the pendulum bob hammer head, and a gap for penetrating and wrapping a bag body of the lithium belt is formed in the pendulum bob hammer head; the metal fork driving device can respectively drive the two metal forks to move to bending positions at two ends of the folding battery cell;
the cutting unit comprises a cutter, a traction clamping piece and an adhesive tape; the traction clamping piece is arranged on the outer side of the folding battery cell and is connected with the traction clamping piece driving device; the cutter sets up in the folding electric core outside, is connected with cutter drive arrangement, the sticky tape middle part sets up in folding electric core bottom, and the sticky tape both ends are stretched out from folding electric core bottom, can realize folding electric core's fixed after the laminating of sticky tape both ends.
Further, the diaphragm welding unit is a hot-melt sealing welding device. The utility model discloses the system bag is realized through the mode of hot melt, and the sealing head of hot melt sealing equipment has one row of archs, and the sealing head passes through the hot melt and realizes the diaphragm seal.
Further, the cold rolling unit for the electrode lug is a cylinder, and cold rolling is performed through the cylinder.
The method for manufacturing the lithium-sulfur battery bag-making lamination by adopting the device comprises the following steps: after the lithium belt is pressed and connected with the tab in a pressing mode, the upper face and the lower face are covered with the diaphragms, the diaphragms are sealed and welded to form a bag body (diaphragm-negative electrode-diaphragm) wrapped with the lithium belt, and the bag body wrapped with the lithium belt is laminated and cut to obtain the folding battery cell.
Further, the thickness of the lithium strip is 20-200 microns and 50-100 microns.
Further, the diaphragm is one or more of a PP-PE dry method composite film, a PP basal film, a ceramic coating diaphragm and a wet method diaphragm.
Further, the tab is a copper foil.
Furthermore, the lithium belt is subjected to tab compression joint through tab cold rolling equipment, the lithium belt is subjected to copper foil compression joint through tab cold rolling, and the compression joint position of the copper foil corresponds to the tab welding position of the stacked battery cell.
Further, the step of laminating the bag body wrapped with the lithium tape comprises the following steps: the bag body wrapped with the lithium belt is sequentially arranged in the hammer head of the tension controller and the hammer head of the pendulum hammer in a penetrating mode, and the hammer head of the tension controller controls the tension of the bag body wrapped with the lithium belt through swinging; the hammer head of the pendulum bob swings to enable the bag body wrapped with the lithium belt to cover and cling to the upper surface of the folding battery cell, so that feeding of a negative electrode (the bag body wrapped with the lithium belt) is realized; after the feeding of the negative electrode is finished, feeding the positive electrode; after the positive pole is fed, the metal fork at the side to be reversed presses the positive pole, and then the hammer head of the pendulum bob swings in a reversing way. The hammer head of the pendulum bob can realize feeding and reversing of a Z-shaped negative electrode (a bag body wrapped with a lithium belt) under the swinging.
Further, the cutting step is as follows: the cutting step is as follows: controlling the swinging times (5-50 times) of a hammer head of a pendulum hammer according to the requirement of a folding battery core; after lamination is finished, the bag body wrapped with the lithium belt is clamped tightly by the traction clamping piece, the cutter stretches out and cuts off the bag body wrapped with the lithium belt from the position between the traction clamping piece and the folding battery cell, the folding battery cell is attached by using an adhesive tape and is moved away (manually or automatically), and the bag body wrapped with the lithium belt is pulled to the initial position of the lamination by the traction clamping piece to carry out next lamination.
The utility model discloses lithium sulphur battery lamination device simple structure, science, reasonable is applicable to the lithium cell, is particularly useful for lithium sulphur battery, compares with prior art and has following advantage:
1) the utility model discloses carry out the diaphragm seal welding with the lithium area after covering the diaphragm and make the bag body (diaphragm-negative pole-diaphragm) that the parcel has the lithium area, saved lithium area (negative pole) cross cutting pole piece process, make the automatic lamination of lithium piece become for the possibility.
2) The utility model discloses a lithium sulphur battery system bag lamination device, the device include utmost point ear cold rolling unit, diaphragm welding unit, folding unit and cut the unit, can realize quick system bag and the quick lamination of machine.
3) The automatic thin lithium lamination greatly improves the production efficiency of the laminated battery cell, saves the labor cost and reduces the rejection rate; after the processing precision is improved, the cell energy density and the cell safety are both improved.
Drawings
FIG. 1 is a schematic view of a conventional lamination stack of a lithium sulfur battery;
fig. 2 is a schematic structural diagram of a lithium sulfur battery lamination device of the present invention;
FIG. 3 is a top view of the folding unit and cutting unit of the present invention;
fig. 4 is a schematic diagram of a structure of a folding battery cell manufactured by the present invention.
Detailed Description
The invention is further illustrated below with reference to the following examples:
example 1
The embodiment discloses a bag-making and laminating device for a lithium-sulfur battery, which comprises a lithium belt conveying unit, a pole lug cold rolling unit, a diaphragm welding unit, a folding unit and a cutting unit, wherein the lithium belt conveying unit is arranged on the lithium belt conveying unit; the lithium belt transmission unit, the lug cold rolling unit and the diaphragm welding unit are sequentially arranged. The lithium belt transfer unit may employ a conventional transfer belt. The diaphragm welding unit is a hot-melt sealing and welding device 6. The utility model discloses the system bag is realized through the mode of hot melt, and the sealing head of hot melt sealing equipment has one row of archs, and the sealing head passes through the hot melt and realizes the diaphragm seal. The cold rolling unit for the electrode lug is an air cylinder 13, and the electrode lug is subjected to cold rolling through the air cylinder 13.
A folding unit is arranged below the diaphragm welding unit and comprises a tension controller 7, a pendulum bob 8 and a metal fork 9, the tension controller 7 comprises a rope and a hammer head, one end of the rope of the tension controller 7 is fixed below an outlet of the diaphragm welding unit, the other end of the rope of the tension controller 7 is fixed with the hammer head of the tension controller 7, and a gap for penetrating and wrapping a bag body with a lithium belt is formed in the hammer head of the tension controller 7; the pendulum bob 8 comprises a rope and a hammer head, one end of the rope of the pendulum bob 8 is fixed below the tension controller 7 (and is not interfered with the hammer head of the tension controller 7), the other end of the rope of the pendulum bob 8 is fixed with the hammer head of the pendulum bob 8, and a gap for penetrating and wrapping a bag body of a lithium belt is formed in the hammer head of the pendulum bob 8; a gap on the hammer head of the tension controller 7 is parallel to a gap arranged on the hammer head of the pendulum bob 8; the length of the pendulum bob 8 rope should satisfy: when the pendulum bob 8 swings to the position above the base for placing the folding battery cell, the lower edge of the pendulum bob 8 just contacts the base for placing the folding battery cell; the number of the metal forks is two, the two metal forks are respectively arranged on the outer sides of the folding battery cell, the metal forks are connected with a metal fork driving device, and the metal fork 9 driving device can respectively drive the two metal forks 9 to move to bending positions at two ends of the folding battery cell;
the cutting unit comprises a cutter, a traction clamping piece and an adhesive tape; the traction clamping piece is arranged on the outer side of the folding electric core and is connected with the traction clamping piece driving device, and the traction clamping piece driving device can drive the traction clamping piece to move above the folding electric core; the cutter sets up in the folding electric core outside, is connected with cutter drive arrangement, and cutter drive arrangement can drive the cutter and move to the centre of pulling clamping piece and folding electric core, and the bag body that will wrap up the lithium area cuts from pulling between clamping piece 11 and the folding electric core, the sticky tape middle part sets up in folding electric core bottom, and the sticky tape both ends are stretched out from folding electric core bottom, can realize folding electric core's fixed after the laminating of sticky tape both ends.
The method for laminating the lithium-sulfur battery bag-making and laminating device comprises the following steps: and (3) pressing a lithium belt 4 to a tab, wherein the lithium belt is pressed to a copper foil tab through tab cold rolling equipment, and the pressing position of the copper foil corresponds to the welding position of the metal tab of the stacked battery cell. And covering the upper surface and the lower surface of the lithium belt after the pole lugs are pressed and welded with the diaphragms, and sealing and welding the diaphragms to form a bag body (diaphragm-negative electrode-diaphragm) wrapped with the lithium belt. Specifically, two rolls of diaphragms 5 (an upper roll and a lower roll) and the lithium belt with the electrode lug pressed are passed through a diaphragm welding position, the lithium belt with the electrode lug pressed is fixed in the process, the two rolls of diaphragms are subjected to deviation rectification and alignment, and the diaphragm-negative electrode-diaphragm is subjected to diaphragm seal welding through a diaphragm seal welding platform.
The bag body wrapped with the lithium tape is laminated and cut to obtain a folded battery cell as shown in fig. 4, and the tab 14 in this embodiment is a copper foil. The thickness of the lithium strip is 20-100 microns. The diaphragm is one or more of a PP-PE dry method composite film, a PP basal film, a ceramic coating diaphragm and a wet method diaphragm.
The method comprises the following steps of laminating a bag body wrapped with a lithium tape: the bag body wrapped with the lithium belt is sequentially arranged in the hammer head of the tension controller 7 and the hammer head of the pendulum bob 8 in a penetrating manner, and the hammer head of the tension controller 7 controls the tension of the bag body wrapped with the lithium belt through swinging; the hammer head of the pendulum bob 8 swings to enable the bag body wrapped with the lithium belt to cover and cling to the upper surface of the folding battery cell, so that feeding of a negative electrode (the bag body wrapped with the lithium belt) is realized; after the feeding of the negative electrode is finished, feeding the positive electrode; after the positive pole is fed, the metal fork 9 on the side to be reversed presses the positive pole, and then the hammer head of the pendulum bob 8 swings in a reversed way. The hammer head of the pendulum bob 8 can realize feeding and reversing of a Z-shaped negative electrode (a bag body wrapped with a lithium belt) under the swinging action.
The cutting steps are as follows: the cutting step is as follows: controlling the swinging times of a hammer head of a pendulum bob 8 according to the requirement of a folding battery cell, wherein the preferable times are 5-50 times; after lamination is finished, the traction clamping piece 11 clamps the bag body wrapped with the lithium belt, the cutter 10 extends out and cuts off the bag body wrapped with the lithium belt from the traction clamping piece 11 to the folding battery cell, the adhesive tape 12 is used for attaching the folding battery cell, the folding battery cell is moved away by a manual or automatic device, and the traction clamping piece 11 pulls the bag body wrapped with the lithium belt to the lamination starting position to perform next lamination.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (3)
1. The lithium-sulfur battery bag-making and laminating device is characterized by comprising a lithium belt conveying unit, a pole lug cold-rolling unit, a diaphragm welding unit, a folding unit and a cutting unit; the lithium belt transmission unit, the lug cold rolling unit and the diaphragm welding unit are sequentially arranged;
a folding unit is arranged below the diaphragm welding unit and comprises a tension controller (7), a pendulum (8) and a metal fork (9), the tension controller (7) comprises a rope and a hammer head, one end of the rope of the tension controller (7) is fixed below an outlet of the diaphragm welding unit, the other end of the rope of the tension controller (7) is fixed with the hammer head of the tension controller (7), and a gap for penetrating and wrapping a bag body with a lithium belt is formed in the hammer head of the tension controller (7); the pendulum bob (8) comprises a rope and a hammer head, one end of the rope of the pendulum bob (8) is fixed below the tension controller (7) and is not interfered with the hammer head of the tension controller (7), the other end of the rope of the pendulum bob is fixed with the hammer head of the pendulum bob (8), and a gap for penetrating and wrapping a bag body with a lithium belt is formed in the hammer head of the pendulum bob (8); the two metal forks are respectively arranged on the outer sides of the folding battery cell and are connected with a metal fork driving device;
the cutting unit comprises a cutter (10), a traction clamping piece (11) and an adhesive tape (12); the traction clamping piece is arranged on the outer side of the folding battery cell and is connected with the traction clamping piece driving device; the cutter sets up in the folding electric core outside, is connected with cutter drive arrangement, the sticky tape middle part sets up in folding electric core bottom, and the sticky tape both ends are stretched out from folding electric core bottom.
2. The lithium sulfur battery bagging and laminating device of claim 1, wherein the membrane welding unit is a hot melt sealing and welding device.
3. The lithium sulfur battery bagging and laminating device of claim 1, wherein the tab cold rolling unit is a cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020132718.7U CN211654975U (en) | 2020-01-21 | 2020-01-21 | Lithium-sulfur battery bag-making and laminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020132718.7U CN211654975U (en) | 2020-01-21 | 2020-01-21 | Lithium-sulfur battery bag-making and laminating device |
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| CN211654975U true CN211654975U (en) | 2020-10-09 |
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| CN202020132718.7U Active CN211654975U (en) | 2020-01-21 | 2020-01-21 | Lithium-sulfur battery bag-making and laminating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129607A (en) * | 2020-01-21 | 2020-05-08 | 中科派思储能技术有限公司 | Method and device for manufacturing and laminating lithium-sulfur battery bag |
| CN114665163A (en) * | 2022-03-11 | 2022-06-24 | 上海兰钧新能源科技有限公司 | Composite lamination equipment and composite lamination process |
-
2020
- 2020-01-21 CN CN202020132718.7U patent/CN211654975U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129607A (en) * | 2020-01-21 | 2020-05-08 | 中科派思储能技术有限公司 | Method and device for manufacturing and laminating lithium-sulfur battery bag |
| CN114665163A (en) * | 2022-03-11 | 2022-06-24 | 上海兰钧新能源科技有限公司 | Composite lamination equipment and composite lamination process |
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