CN111761364B - Die cutting and welding equipment and method for intermittent coating type pole piece - Google Patents
Die cutting and welding equipment and method for intermittent coating type pole piece Download PDFInfo
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- CN111761364B CN111761364B CN202010560611.7A CN202010560611A CN111761364B CN 111761364 B CN111761364 B CN 111761364B CN 202010560611 A CN202010560611 A CN 202010560611A CN 111761364 B CN111761364 B CN 111761364B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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 invention provides die cutting and welding equipment and a die cutting and welding method for an intermittent coating type pole piece, wherein the die cutting and welding equipment comprises: pole piece substrate unwinding mechanism, utmost point ear die-cutting mechanism, welding mechanism, cut the mechanism, collect the mechanism and be used for the foil material transfer mechanism of conveying metal foil material section, pole piece substrate unwinding mechanism's low reaches are equipped with utmost point ear die-cutting mechanism in proper order, welding mechanism, cut mechanism and collection mechanism, cut the mechanism and include pole piece substrate fixing device, draw fixing device, external utmost point ear turns over a device and cutting device, pole piece substrate fixing device, utmost point ear turns over a device, draw fixing device and set gradually at the welding mechanism low reaches, cutting device sets up in external utmost point ear and turns over a device one side, cutting device is used for cutting into the monolithic pole piece with the pole piece substrate that accomplishes external utmost point ear and turn over a device. The invention realizes the continuity of pole piece processing, realizes the connection of welding and cutting by externally connecting the lug and folding, and greatly reduces the difficulty of cutting.
Description
Technical Field
The invention relates to the technical field of lithium ion battery production equipment, in particular to die cutting welding equipment and a die cutting welding method for an intermittent coating type pole piece.
Background
In the production process of the lithium ion battery, the pole piece often leads to the fold of the edge of the pole lug due to different extensions of the pole lug area and the material area in the rolling process, the fold of the edge of the pole lug can be influenced by pure foil, but the crack of the edge of the pole lug can be caused to some composite current collectors, so that the internal resistance is too high, and even the pole piece cannot be used. Therefore, the problems of continuous coating and roll pressing are generally solved by a method using batch coating. However, in the intermittent coating process, the tab is in the middle of the active material, and the composite current collector needs to be welded for the second time due to the welding particularity of the composite current collector, so that the tab needs to be left, but the cutting is difficult due to the tab.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides die cutting welding equipment and a die cutting welding method for an intermittent coating type pole piece.
The invention provides die cutting and welding equipment for an intermittent coating type pole piece, which comprises: the electrode plate base material unwinding mechanism, the tab die cutting mechanism, the welding mechanism, the cutting mechanism, the collecting mechanism and the foil material transferring mechanism are arranged on the electrode plate base material unwinding mechanism;
a tab die-cutting mechanism, a welding mechanism, a splitting mechanism and a collecting mechanism are sequentially arranged at the downstream of the pole piece substrate unreeling mechanism, a foil transferring mechanism is used for transferring the metal foil section to the welding mechanism, and the welding mechanism is used for welding the metal foil section and the die-cut tabs to form external tabs;
the cutting mechanism comprises a pole piece substrate fixing device, a traction fixing device, an external tab folding device and a cutting device, wherein the pole piece substrate fixing device, the external tab folding device and the traction fixing device are sequentially arranged at the downstream of the welding mechanism, the cutting device is arranged on one side of the external tab folding device, and the cutting device is used for cutting the pole piece substrate which is turned over and folded over after the external tab is completed into a single pole piece.
Preferably, the external tab clamping and fixing device is further included, the external tab clamping and fixing device is arranged on one side of the external tab folding device, and the external tab clamping and fixing device is used for fixing the folded external tab.
Preferably, the external tab folding device further comprises a flattening mechanism for flattening the external tab, and the flattening mechanism is arranged between the external tab folding device and the traction fixing device.
Preferably, the pole piece sorting machine further comprises a detection mechanism for detecting the single pole pieces and a pole piece sorting mechanism for automatically putting the qualified single pole pieces into the collecting mechanism, wherein the detection mechanism is arranged at the downstream of the slitting mechanism, and the pole piece sorting mechanism is arranged at the downstream of the detection mechanism.
Preferably, the pole piece selection mechanism is a suction cup type manipulator.
Preferably, the detection mechanism comprises a CCD detection device and an internal resistance testing device, the CCD detection device is positioned at the downstream of the smoothing mechanism, and the internal resistance testing device is positioned at the downstream of the CCD detection device.
Preferably, the traction fixing device is a suction cup robot.
Preferably, the device further comprises a foil unwinding mechanism for unwinding the foil and a foil cutting mechanism for cutting the foil into foil sections, wherein the foil cutting mechanism is arranged at the downstream of the foil unwinding mechanism, and the foil transferring mechanism is arranged at the foil cutting mechanism.
The invention also provides a die cutting and welding method for the intermittent coating type pole piece, which comprises the following steps:
s1, performing tab die cutting on the uncoated area of the pole piece substrate to form a tab;
s2, welding the tab and the metal foil section to form an external tab;
s3, after welding is completed, turning over the part of the external tab which is grown out;
s4, cutting the pole piece substrate which is turned over by the external tab into single pole pieces;
and S5, collecting the single pole piece.
Preferably, in the step S3, the folding angle is 90 to 180 degrees.
Preferably, in the step S3, the folding angle is 90 degrees.
Preferably, in the step S4, after the cutting is completed, the external tab of the single pole piece is smoothed.
Preferably, in step S5, the single pole pieces are detected, and the single pole pieces qualified for detection are collected.
Preferably, in step S5, the qualified single pole piece is picked up by the suction cup type manipulator and sent into the collecting mechanism.
Preferably, in step S5, the single pole piece is subjected to CCD detection and internal resistance test.
The invention adopts the mode of firstly die cutting the lug for forming, welding the external lug and then cutting, meets the production requirement of the pole piece, simultaneously realizes the continuity of pole piece processing, realizes the connection of welding and cutting by a method of folding the external lug, and greatly reduces the cutting difficulty.
Drawings
Fig. 1 is a schematic structural diagram of die cutting and welding equipment for an intermittent coating type pole piece provided by the invention.
Fig. 2 is a schematic diagram of the die cutting and welding process of the pole piece substrate in the invention.
Description of reference numerals:
1-pole piece substrate 2-pole piece substrate unreeling mechanism 3-pole lug die cutting mechanism 4-welding mechanism
5-external tab folding device 6-cutting device 7-traction fixing device 8-CCD detection device
9-internal resistance testing device 10-pole piece selecting mechanism 11-collecting mechanism
Detailed Description
As shown in the attached drawings, fig. 1 is a schematic structural diagram of die cutting and welding equipment for an intermittent coating type pole piece, which is provided by the invention; fig. 2 is a schematic diagram of a die-cutting welding process of a pole piece substrate 1 in the invention, wherein a is the pole piece substrate 1 after die-cutting of a tab, B is the pole piece substrate 1 after welding of a metal foil section, C is the pole piece substrate 1 after folding of an external tab, D is a single pole piece, and E is a single pole piece with a flattened external tab.
Referring to fig. 1 and fig. 2, the invention provides a die cutting welding device for an intermittent coating type pole piece, comprising: the electrode plate base material unwinding mechanism 2, the tab die cutting mechanism 3, the welding mechanism 4, the splitting mechanism, the collecting mechanism 11 and the foil material transferring mechanism;
a tab die-cutting mechanism 3, a welding mechanism 4, a splitting mechanism and a collecting mechanism 11 are sequentially arranged at the downstream of the pole piece substrate unreeling mechanism 2, a foil transfer mechanism is arranged at one side of the welding mechanism 4 and used for transferring a metal foil section to the welding mechanism 4, and the welding mechanism 4 is used for welding the metal foil section and the die-cut tabs to form external tabs;
the cutting mechanism comprises a pole piece substrate fixing device, a traction fixing device 7, an external tab folding device 5 and a cutting device 6, the pole piece substrate fixing device, the external tab folding device 5 and the traction fixing device 7 are sequentially arranged at the downstream of a welding mechanism 4, the cutting device 6 is arranged on one side of the external tab folding device 5, and the cutting device 6 is used for cutting a pole piece substrate 1 which is turned over and folded over after the external tab is completed into a single pole piece.
According to the invention, firstly, tab die cutting is carried out on a pole piece substrate 1 coated intermittently to cut out tabs, the shape of the tabs is determined, then a metal foil section is conveyed to a welding mechanism 4 through a metal foil section conveying mechanism, so that the metal foil section and the die-cut tabs are welded to form external tabs, then two sides of a to-be-cut part of the pole piece substrate are simultaneously fixed through a pole piece substrate fixing device and a traction fixing device 7, the part where the external tabs grow out is folded through an external tab folding device 5 so that the to-be-cut part of the pole piece substrate is exposed in the moving stroke of a cutting device 6, the cutting device 6 cuts the to-be-cut part of the pole piece substrate to form a single pole piece under the condition of not influencing the external tabs, and finally the single pole piece is collected for use in a later-stage process. And the cutting device 6 and the external tab folding device 5 are reset, the traction fixing device 7 is used for fixing and traction the pole piece substrate 1 fixed by the pole piece substrate fixing device again, so that the position to be cut of the next pole piece substrate is moved to the cutting position of the cutting device 6, and the operation is repeated, so that the die cutting and welding process of the pole piece substrate 1 can be carried out.
The invention adopts the mode of firstly die cutting the lug for forming, welding the external lug and then cutting, meets the production requirement of the pole piece, simultaneously realizes the continuity of pole piece processing, realizes the connection of welding and cutting by a method of folding the external lug, and greatly reduces the cutting difficulty.
In order to avoid that the external tab after being turned over resets in the cutting process of the cutting device 6 and affects cutting, in the embodiment, the external tab clamping and fixing device is further included, the external tab clamping and fixing device is arranged on one side of the external tab turning-over device 5, and the external tab clamping and fixing device is used for fixing the external tab after being turned over.
In order to facilitate operations such as collection or detection in the next step, in the embodiment, the external tab flattening device further comprises a flattening mechanism for flattening the external tab, and the flattening mechanism is arranged between the external tab folding device 5 and the traction fixing device 7.
In order to ensure the quality of the produced single pole piece, in this embodiment, the device further includes a detection mechanism for detecting the single pole piece and a pole piece selection mechanism 10 for automatically putting the qualified single pole piece into the collection mechanism 11, the detection mechanism is arranged at the downstream of the slitting mechanism, and the pole piece selection mechanism 10 is arranged at the downstream of the detection mechanism.
In order to select and move the single pole piece without damaging the single pole piece, in the present embodiment, the pole piece selecting mechanism 10 is a suction cup type manipulator.
In order to ensure the quality of the single pole piece, in the present embodiment, the detection mechanism includes a CCD detection device 8 and an internal resistance test device 9, the CCD detection device 8 is located downstream of the smoothing mechanism, and the internal resistance test device 9 is located downstream of the CCD detection device 8.
In the present embodiment, the traction fixing device 7 is a suction cup robot.
In this embodiment, still include the foil unwinding mechanism that is used for the foil to unreel and be used for tailorring the foil into the foil cutting mechanism of foil section with the foil, foil cutting mechanism sets up in foil unwinding mechanism low reaches, and foil transfer mechanism sets up in foil cutting mechanism.
The invention also provides a die cutting and welding method for the intermittent coating type pole piece, which comprises the following steps:
s1, performing tab die cutting on the uncoated area of the pole piece substrate 1 to form a tab;
s2, welding the tab and the metal foil section to form an external tab;
s3, after welding is completed, turning over the part of the external tab which is grown out;
s4, cutting the pole piece substrate 1 which is turned over by the external tab into single pole pieces;
and S5, collecting the single pole piece.
The invention adopts the method of firstly die cutting the lug for forming, externally connecting the lug and then cutting, meets the production requirement of the pole piece, simultaneously realizes the continuity of pole piece processing, realizes the connection of welding and cutting by the method of turning the lug, and greatly reduces the cutting difficulty.
In order to reduce the influence of the folding on the circumscribed electrode tab as much as possible without affecting the cutting, in the present embodiment, in the step S3, the folding angle is 90 to 180 degrees.
In a further specific embodiment, in the step S3, the folding angle is 90 degrees.
In order to facilitate the operations such as collection or detection in the next step, in this embodiment, in step S4, after the cutting is completed, the external tab of the single-piece pole piece is smoothed.
In order to ensure the quality of the single pole piece, in the present embodiment, in step S5, the single pole piece is detected, and the single pole piece qualified for detection is collected.
In order to select and move the single pole piece without damaging the single pole piece, in the present embodiment, in step S5, the single pole piece qualified for detection is sucked by the suction cup type manipulator and sent to the collecting mechanism 11.
In this embodiment, in step S5, the single pole piece is subjected to CCD detection and internal resistance test.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a die cutting welding equipment for intermittent coating formula pole piece which characterized in that includes: the electrode plate base material unwinding mechanism (2), the tab die cutting mechanism (3), the welding mechanism (4), the cutting mechanism, the collecting mechanism (11) and the foil material transferring mechanism;
a tab die-cutting mechanism (3), a welding mechanism (4), a splitting mechanism and a collecting mechanism (11) are sequentially arranged at the downstream of the pole piece substrate unreeling mechanism (2), a foil transfer mechanism is used for transferring a metal foil section to the welding mechanism (4), and the welding mechanism (4) is used for welding the metal foil section and the die-cut tabs to form external tabs;
the cutting mechanism comprises a pole piece substrate fixing device, a traction fixing device (7), an external tab folding device (5) and a cutting device (6), the pole piece substrate fixing device, the external tab folding device (5) and the traction fixing device (7) are sequentially arranged at the downstream of the welding mechanism (4), the cutting device (6) is arranged on one side of the external tab folding device (5), and the cutting device (6) is used for cutting the pole piece substrate (1) which is folded by the external tab into single pole pieces;
the die-cutting welding equipment for the intermittent coating type pole piece further comprises an external tab clamping and fixing device, wherein the external tab clamping and fixing device is arranged on one side of the external tab folding device (5), and the external tab clamping and fixing device is used for fixing the folded external tab.
2. The die-cutting welding equipment for the intermittent coating type pole piece is characterized by further comprising a flattening mechanism for flattening the external tab, wherein the flattening mechanism is arranged between the external tab folding device (5) and the traction fixing device (7).
3. The die-cutting welding equipment for the intermittent coating type pole piece is characterized by further comprising a detection mechanism for detecting single pole pieces and a pole piece selecting mechanism (10) for automatically putting the qualified single pole pieces into a collecting mechanism (11), wherein the detection mechanism is arranged at the downstream of the cutting mechanism, and the pole piece selecting mechanism (10) is arranged at the downstream of the detection mechanism; the pole piece selecting mechanism (10) is a sucker type mechanical arm; the detection mechanism comprises a CCD detection device (8) and an internal resistance testing device (9), the CCD detection device (8) is positioned at the downstream of the smoothing mechanism, and the internal resistance testing device (9) is positioned at the downstream of the CCD detection device (8).
4. The die-cutting welding equipment for intermittent coating type pole pieces according to claim 1, characterized in that the traction fixing device (7) is a sucker manipulator.
5. The die-cutting welding equipment for the intermittent coating type pole piece as claimed in claim 1, further comprising a foil unwinding mechanism for unwinding the foil and a foil cutting mechanism for cutting the foil into foil sections, wherein the foil cutting mechanism is arranged at the downstream of the foil unwinding mechanism, and the foil transferring mechanism is arranged at the foil cutting mechanism.
6. A die cutting welding method for an intermittent coating type pole piece is characterized by comprising the following steps:
s1, carrying out tab die cutting on the uncoated area of the pole piece substrate (1) to form a tab;
s2, welding the tab and the metal foil section to form an external tab;
s3, after welding is completed, turning over the part of the external tab which is grown out;
s4, cutting the pole piece substrate (1) which is turned over by the external tab into single pole pieces;
and S5, collecting the single pole piece.
7. The die-cutting welding method for the intermittently coated pole piece according to claim 6, wherein in the step of S3, the folding angle is 90 to 180 degrees.
8. The die-cutting welding method for the intermittent coating type pole piece according to the claim 6, characterized in that in the step S4, the external connection tabs of the single pole piece are smoothed after the cutting is finished.
9. The die-cutting welding method for the intermittent coating type pole piece according to any one of the claims 6 to 8, characterized in that in the step S5, the single pole piece is detected, and the single pole piece qualified in detection is collected;
in the step S5, the qualified single pole piece is sucked by the sucker type manipulator and sent into a collecting mechanism (11); and in the step of S5, carrying out CCD detection and internal resistance test on the single pole piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010560611.7A CN111761364B (en) | 2020-06-18 | 2020-06-18 | Die cutting and welding equipment and method for intermittent coating type pole piece |
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| CN202010560611.7A CN111761364B (en) | 2020-06-18 | 2020-06-18 | Die cutting and welding equipment and method for intermittent coating type pole piece |
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| CN111761364A CN111761364A (en) | 2020-10-13 |
| CN111761364B true CN111761364B (en) | 2022-04-12 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331811A (en) * | 2020-10-30 | 2021-02-05 | 蜂巢能源科技有限公司 | Pole piece processing method and equipment |
| CN114122408B (en) * | 2021-11-15 | 2023-07-07 | 芜湖天弋能源科技有限公司 | Device and method for improving turnover of lug of interlayer current collector |
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