CN211028533U - Welding device for composite current collector and foil of lithium ion battery - Google Patents
Welding device for composite current collector and foil of lithium ion battery Download PDFInfo
- Publication number
- CN211028533U CN211028533U CN201921698521.3U CN201921698521U CN211028533U CN 211028533 U CN211028533 U CN 211028533U CN 201921698521 U CN201921698521 U CN 201921698521U CN 211028533 U CN211028533 U CN 211028533U
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- Prior art keywords
- vacuum
- foil
- welding device
- vacuum chuck
- current collector
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- 238000003466 welding Methods 0.000 title claims abstract description 58
- 239000011888 foil Substances 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 abstract description 11
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a welding device for a composite current collector and a foil of a lithium ion battery, which comprises a base, wherein a rotating disc is arranged on the top surface of the base, and a working base station is arranged on the top surface of the rotating disc; the top surface of the working base station is provided with a vacuum suction hole, and the side surface or the bottom surface of the working base station is provided with a vacuum connector communicated with the vacuum suction hole; the first vacuum chuck, the second vacuum chuck, the third vacuum chuck, the ultrasonic welding device and the fourth vacuum chuck are sequentially arranged on the periphery of the rotating disc. This scheme is connected with external evacuation equipment through the vacuum connector, makes the hole position department of inhaling in vacuum produce little negative pressure to increase the adhesive force between foil and the work base station, guarantee at the rotation in-process of rotary disk, the position of foil does not take place to remove, ensures follow-up welding work's normal clear. This device is through welding the foil simultaneously in the both sides of compound mass flow body utmost point ear, through the switching of foil for the electric current in the electric core can be carried out, device simple structure, convenient operation.
Description
Technical Field
The utility model belongs to new forms of energy power lithium cell field, concretely relates to welding set of lithium ion battery composite current collector and foil.
Background
At present, a current collector commonly used in a lithium battery is a foil, along with the continuous development of the battery industry, a composite current collector compounded by polymers and metals appears, the composite current collector is composed of a polymer plastic layer, a metal coating layer on the surface, a conducting layer and the like, the surface density of the composite current collector is low, the energy density of the lithium ion battery is improved, the machining performance is good, the problem of belt breakage in the processes of coating, rolling and the like can be obviously improved, meanwhile, the risk of thermal runaway caused by internal short circuit can be reduced by the composite current collector, and the safety of the battery is improved. However, due to the problem of the electrical conductivity of the composite current collector, the current in the battery cell needs to be transferred by using the foil to connect with the composite current collector. In the existing welding device, the welding process of the composite current collector and the foil is complex, and the quality of a welded product is unstable, so that potential safety hazards exist in the use process of the composite current collector.
Disclosure of Invention
For solving prior art's not enough, the utility model aims at providing a welding set of lithium ion battery composite current collector and foil utilizes ultrasonic spot welding method, welds the foil in the both sides of composite current collector utmost point ear, through the switching of foil for the electric current in the electric core can be carried out, and welding strength is high, and surface quality is good, is favorable to realizing automated production.
In order to achieve the above object, the utility model adopts the following technical scheme:
a welding device for a composite current collector and a foil of a lithium ion battery comprises a base, wherein a rotating disc is arranged on the top surface of the base, and a working base station is arranged on the top surface of the rotating disc; the top surface of the working base station is provided with a vacuum suction hole, and the side surface or the bottom surface of the working base station is provided with a vacuum connector communicated with the vacuum suction hole; and a first vacuum sucker, a second vacuum sucker, a third vacuum sucker, an ultrasonic welding device and a fourth vacuum sucker are sequentially arranged on the peripheral side of the rotating disc. When the rotary disc rotates, the position on the working base is unstable and is easy to move; this scheme is connected with external evacuation equipment through the vacuum connector, makes the hole position department of inhaling in vacuum produce little negative pressure to increase the adhesive force between foil and the work base station, guarantee at the rotation in-process of rotary disk, the position of foil does not take place to remove, ensures follow-up welding work's normal clear.
Further, the first vacuum chuck, the second vacuum chuck, the third vacuum chuck, the ultrasonic welding device and the fourth vacuum chuck are arranged along the rotating disc at central angles of 72 degrees and the like. First vacuum chuck is used for carrying first foil, and second vacuum chuck is used for carrying the pole piece, and third vacuum chuck is used for carrying the second foil, and ultrasonic welding device is used for welding the current collector utmost point ear and the foil of pole piece together, fourth vacuum chuck is used for taking out the pole piece that the welding was accomplished from the work base station.
In a further scheme, the number of the working base stations is five, and the working base stations correspond to the first vacuum suction cups, the second vacuum suction cups, the third vacuum suction cups, the ultrasonic welding device and the fourth vacuum suction cups respectively.
In a further scheme, the first vacuum chuck, the second vacuum chuck, the third vacuum chuck and the fourth vacuum chuck are identical in structure and comprise a chuck for adsorbing objects and a vacuum tube located above the chuck. When the vacuum sucking disc works, the vacuum tube is communicated with the vacuumizing equipment, the vacuum tube is vacuumized, negative pressure is generated in the sucking disc, and therefore an object to be lifted is firmly sucked, and the object can be carried.
In a further aspect, the ultrasonic welding device includes a base and a welding head. The ultrasonic welding equipment is positioned above the composite current collector tab of the pole piece.
The rotating disc, the ultrasonic welding device, the first vacuum chuck, the second vacuum chuck, the third vacuum chuck, the ultrasonic welding device, the fourth vacuum chuck and the like are all commercially available products. The specific operating principle thereof will not be described herein in a repeated manner. The on and off of the above-mentioned equipment can be controlled by manual switch or automatic control by controller, and these two modes are conventional control modes in the field, are not the invention point of this equipment, and will not be described in detail here.
The utility model has the advantages that: this scheme is connected with external evacuation equipment through the vacuum connector, makes the hole position department of inhaling in vacuum produce little negative pressure to increase the adhesive force between foil and the work base station, guarantee at the rotation in-process of rotary disk, the position of foil does not take place to remove, ensures follow-up weldment work's normal clear, improves welding quality and weldment work efficiency. The utility model discloses utilize the ultrasonic welding mode to weld the foil simultaneously in the both sides of the compound mass flow body utmost point ear of pole piece, through the switching of foil for the electric current in the electric core can be carried out, and installs simple structure, is favorable to realizing automated production, improves work efficiency.
Drawings
FIG. 1 is a schematic structural view of a welding device according to the present invention;
FIG. 2 is a schematic structural view of an ultrasonic welding apparatus
FIG. 3 is a schematic structural diagram of a composite current collector tab and foil of a pole piece after welding
Reference numerals: 1-base, 2-rotating disc, 3-working base station, 4-vacuum suction hole, 201-first vacuum chuck, 202-second vacuum chuck, 203-third vacuum chuck, 204-ultrasonic welding device, 205-fourth vacuum chuck, 5-chuck, 6-vacuum tube, 7-base, 8-welding head, 10-composite current collector tab of pole piece, 11-foil material and 12-welding spot.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. The composite current collector used in the following examples was an aluminum-plated film or a copper-plated film, and the corresponding foil was an aluminum foil or a copper foil. The welding objects in this embodiment are the composite current collector tab of the die-cut single pole piece and the cut foil.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1-2, a welding device for a composite current collector and a foil of a lithium ion battery comprises a base 1, wherein a rotating disc 2 is installed on the top surface of the base 1, and a working base 3 is installed on the top surface of the rotating disc 2; the top surface of the working base 3 is provided with a vacuum suction hole 4, and the side surface or the bottom surface of the working base is provided with a vacuum connecting port (not shown) communicated with the vacuum suction hole. During working, the vacuum suction hole is connected with external vacuum pumping equipment through the vacuum connecting port, so that micro negative pressure is generated at the position of the vacuum suction hole, the adhesive force between an object positioned on the working base and the working base can be increased, and the position of the object does not deviate in the rotating process of the rotating disc; a first vacuum chuck 201, a second vacuum chuck 202, a third vacuum chuck 203, an ultrasonic welding device 204 and a fourth vacuum chuck 205 are sequentially and uniformly arranged at a central angle of 72 degrees and the like on the peripheral side of the rotating disc 2; the first vacuum chuck 201, the second vacuum chuck 202, the third vacuum chuck 203 and the fourth vacuum chuck 204 have the same structure, and comprise a chuck 5 for adsorbing an object and a vacuum tube 6 positioned above the chuck 5. When the vacuum lifting device works, the vacuum pipe is communicated with the vacuum pumping equipment, the vacuum pipe is pumped, negative pressure is generated in the sucking disc, and therefore an object to be lifted is firmly sucked, and the object can be carried; the ultrasonic welding device 204 includes a base 7 and a horn 8. The ultrasonic welding device 204 is used for welding the composite current collector tabs and the foils of the pole pieces together. As a preferred technical scheme, the number of the working base stations 3 is five, and the working base stations respectively correspond to the first vacuum chuck, the second vacuum chuck, the third vacuum chuck, the ultrasonic welding device and the fourth vacuum chuck;
when the rotary disc rotates, the position of the foil on the working base station is unstable and is easy to move; this scheme is inhaled the little negative pressure that hole position department produced through the vacuum, can increase the adhesive force between foil and the work base station, guarantees at the rotation in-process of rotary disk, and the position of foil does not take place to remove, guarantees follow-up welding work's normal clear.
The operation process of the device is as follows: firstly, a first foil is conveyed to a working base station through a first vacuum sucker 201, and the working base station can ensure the stability of the position of the first foil in the rotating process of the working base station through the action of a vacuum sucking hole; the working base station moves to the next station along with the anticlockwise rotation of the rotating disc, the second vacuum chuck 202 conveys the die-cut pole piece to the working base station at the moment, and the composite current collector tab of the pole piece covers the first foil; the working base station continuously moves to the next station along with the anticlockwise rotation of the rotating disc, at the moment, a second foil is conveyed to the working base station through a third vacuum chuck 203 and covers the composite current collector tab of the pole piece, and the bottom surface and the top surface of the composite current collector tab of the pole piece are respectively wrapped by the first foil and the second foil; the working base station continues to move to the next station under the driving of the rotating disc, at the moment, the ultrasonic welding device 204 works, and the composite current collector tabs of the pole piece and the foils positioned on the bottom surface and the top surface of the pole piece are welded to complete the welding of the composite current collector and the foils; after the welding is completed, the working base platform continues to move to the next station under the driving of the rotating disk, and at the moment, the welded pole piece is taken out from the working base platform through the fourth vacuum chuck 205, so that a cycle is completed. The structural schematic diagram of the composite current collector tab and the foil of the pole piece after welding is shown in fig. 3, two sides of the composite current collector tab 10 of the pole piece are wrapped by the foil 11, the composite current collector 10 and the foil 11 are welded together through an ultrasonic welding device, the composite current collector 10 and the foil 11 are welded together through a welding spot 12, and the current in the battery cell is transmitted through the switching of the foil; the device has high welding strength and good surface quality, and is favorable for realizing automatic production.
Claims (5)
1. The utility model provides a welding set of lithium ion battery composite current collector and foil which characterized in that: the rotary table comprises a base (1), wherein a rotary disc (2) is arranged on the top surface of the base (1), and a working base table (3) is arranged on the top surface of the rotary disc (2); the top surface of the working base (3) is provided with a vacuum suction hole (4), and the side surface or the bottom surface of the working base (3) is provided with a vacuum connector communicated with the vacuum suction hole (4); the periphery of the rotating disc (2) is sequentially provided with a first vacuum sucker (201), a second vacuum sucker (202), a third vacuum sucker (203), an ultrasonic welding device (204) and a fourth vacuum sucker (205).
2. The welding device of claim 1, wherein: the first vacuum chuck (201), the second vacuum chuck (202), the third vacuum chuck (203), the ultrasonic welding device (204) and the fourth vacuum chuck (205) are arranged along the rotating disc (2) at equal central angles of 72 degrees.
3. The welding device of claim 1, wherein: the number of the working base stations (3) is five, and the working base stations correspond to the first vacuum suction cup (201), the second vacuum suction cup (202), the third vacuum suction cup (203), the ultrasonic welding device (204) and the fourth vacuum suction cup (205) respectively.
4. The welding device of claim 1, wherein: the first vacuum chuck (201), the second vacuum chuck (202), the third vacuum chuck (203) and the fourth vacuum chuck (205) are identical in structure; comprises a suction cup (5) for absorbing objects and a vacuum tube (6) positioned above the suction cup (5).
5. The welding device of claim 1, wherein: the ultrasonic welding device (204) comprises a base (7) and a welding head (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921698521.3U CN211028533U (en) | 2019-10-11 | 2019-10-11 | Welding device for composite current collector and foil of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921698521.3U CN211028533U (en) | 2019-10-11 | 2019-10-11 | Welding device for composite current collector and foil of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211028533U true CN211028533U (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921698521.3U Active CN211028533U (en) | 2019-10-11 | 2019-10-11 | Welding device for composite current collector and foil of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211028533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523531A (en) * | 2021-07-12 | 2021-10-22 | 芜湖天弋能源科技有限公司 | Method for welding special current collector and external electrode of lithium ion battery |
-
2019
- 2019-10-11 CN CN201921698521.3U patent/CN211028533U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523531A (en) * | 2021-07-12 | 2021-10-22 | 芜湖天弋能源科技有限公司 | Method for welding special current collector and external electrode of lithium ion battery |
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