CN113601850A - Ultrasonic welding device and method for lithium battery insulating film - Google Patents
Ultrasonic welding device and method for lithium battery insulating film Download PDFInfo
- Publication number
- CN113601850A CN113601850A CN202110739938.5A CN202110739938A CN113601850A CN 113601850 A CN113601850 A CN 113601850A CN 202110739938 A CN202110739938 A CN 202110739938A CN 113601850 A CN113601850 A CN 113601850A
- Authority
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- China
- Prior art keywords
- insulating film
- winding core
- plate
- ultrasonic welding
- fixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 77
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 50
- 238000009499 grossing Methods 0.000 claims abstract description 9
- 239000002985 plastic film Substances 0.000 claims abstract description 8
- 229920006255 plastic film Polymers 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 37
- 238000001514 detection method Methods 0.000 claims description 23
- 230000007306 turnover Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 6
- 238000005491 wire drawing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 206010067482 No adverse event Diseases 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides an ultrasonic welding method for an insulating film of a lithium battery, which comprises the following steps: s1, fixing the winding core wrapped with the insulating film, and smoothing the insulating film on the surface of the winding core; s2, placing a battery cover plate on the surface of the winding core, and welding the insulating film on the surface of the winding core to the PP plastic film of the battery cover plate by using an ultrasonic welding device; s3, turning over the winding core and fixing again to smooth the insulation film on the surface of the winding core; and S4, placing a battery cover plate on the surface of the winding core, and welding the insulating film on the surface of the winding core to the PP plastic film of the battery cover plate by using an ultrasonic welding device. The invention uses ultrasonic welding to weld the insulating film on the battery cover plate, and no wire drawing phenomenon occurs when the insulating film and the cover plate are fixed, thereby avoiding the explosion point during cover closing welding, solving the leakage situation after the battery explosion point, and greatly improving the qualified rate of cover closing laser welding.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to an ultrasonic welding device and method for an insulating film of a lithium battery.
Background
Lithium ion batteries are used as power energy sources of new energy automobiles, the demand is increasing day by day, and the safety is always the focus of people's attention. The lithium ion battery is internally provided with a battery roll core, the shell of the common battery is an aluminum shell or a steel shell, an insulating film is required to be wrapped outside the roll core to isolate the roll core from a battery shell conductor, and the lithium ion roll core is required to be ensured not to be contacted with any conductor except positive and negative terminal posts after electrolyte is injected into the electrolyte.
The traditional insulating film is formed by hot melting the insulating film on the cover plate in a hot melting mode, although the insulating film and the cover plate can be firmly connected through hot melting, the insulating film after hot melting is easy to generate filaments due to overhigh temperature, the filaments can be exposed outside a battery shell after being covered, and a spot explosion site is caused during welding, so that unstable welding leakage is caused, the battery is directly scrapped, and meanwhile, manual full inspection is carried out on a production site, and manpower is wasted.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an ultrasonic welding device and method for an insulating film of a lithium battery.
The invention provides an ultrasonic welding method for an insulating film of a lithium battery, which comprises the following steps:
s1, fixing the winding core wrapped with the insulating film, and smoothing the insulating film on the surface of the winding core;
s2, placing a battery cover plate on the surface of the winding core, and welding the insulating film on the surface of the winding core to the PP plastic film of the battery cover plate by using an ultrasonic welding device;
s3, turning over the winding core and fixing again to smooth the insulation film on the surface of the winding core;
and S4, placing a battery cover plate on the surface of the winding core, and welding the insulating film on the surface of the winding core to the PP plastic film of the battery cover plate by using an ultrasonic welding device.
The invention also provides an ultrasonic welding device for the insulating film of the lithium battery, which comprises a workbench, wherein a turntable is rotatably arranged on the workbench, a plurality of fixing mechanisms for fixing the winding core wrapped with the insulating film are arranged on the turntable and are distributed circumferentially, and a welding station and a detection station are sequentially arranged on the workbench along the rotating direction of the turntable; a flattening mechanism and an ultrasonic welding mechanism are installed at the welding station, the flattening mechanism is used for flattening the insulating film on the surface of the winding core on the fixing mechanism at the welding station, and the ultrasonic welding mechanism is used for carrying out ultrasonic welding on the flattened winding core at the welding station; and a CCD detection mechanism is installed at the detection station and used for carrying out appearance detection on the welded roll core on the fixing mechanism at the detection station.
Preferably, the fixing mechanism comprises a protection plate, a fixed plate, a movable plate and a first driving cylinder, the protection plate is fixed on the turntable, the bottom of the protection plate is connected with a plurality of connecting columns, the connecting columns penetrate through the turntable, the fixed plate is located below the turntable and connected with the connecting columns, the movable plate is located between the turntable and the fixed plate, a plurality of vertically-arranged limiting rods are mounted on the movable plate, the limiting rods are distributed in a square shape, the limiting rods vertically penetrate through the turntable and the protection plate, and the limiting rods are in sliding fit with the turntable and the protection plate; the first driving cylinder is arranged on the fixed plate and is used for driving the moving plate to move up and down in the vertical direction.
Preferably, the movable plate is connected with the connecting columns in a sliding fit mode.
Preferably, the smoothing mechanism comprises a mounting rack, a moving rack, a sliding block, a pushing plate and a second driving cylinder, the mounting rack is mounted on the workbench, the moving rack is slidably mounted on the mounting rack and is provided with a vertically arranged sliding rail, the sliding block is slidably mounted on the sliding rail, the pushing plate is horizontally arranged above the turntable and is mounted on the sliding block, and the second driving cylinder is mounted on the mounting rack and is used for driving the moving rack to move along the radial direction of the turntable.
Preferably, the number of the turntables is two, and a turning manipulator is arranged between the two turntables.
According to the ultrasonic welding method for the insulating film of the lithium battery, provided by the invention, the insulating film is welded on the battery cover plate by ultrasonic welding, and no wire drawing phenomenon occurs when the insulating film and the cover plate are fixed, so that the explosion point during cover closing welding is avoided, the problem of liquid leakage after the explosion point of the battery is solved, and the qualified rate of cover closing laser welding is greatly improved. The ultrasonic welding device for the insulating film of the lithium battery provided by the invention has the advantages that the insulating film is welded on the battery cover plate through ultrasonic welding, the operation is convenient, the effect after welding is detected by the CCD detection mechanism in real time, the welding effect is ensured, no adverse reaction is caused, all the defects of hot-melt welding are eliminated, the primary qualified rate of the battery is greatly improved, and the automation of production lines is realized.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic welding device for an insulating film of a lithium battery according to the present invention;
fig. 2 is a schematic structural diagram of a turntable in an ultrasonic welding device for an insulating film of a lithium battery according to the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Referring to fig. 1 and 2, the invention provides an ultrasonic welding device for an insulating film of a lithium battery, which comprises a workbench 1, wherein two turntables 2 are rotatably arranged on the workbench 1, and a turnover manipulator 15 is arranged between the two turntables 2. Wherein:
all install a plurality of fixed establishment and a plurality of fixed establishment that are used for fixed parcel to have the core of rolling up of insulating film on each carousel 2 and be the circumference and distribute, have set gradually welding station and detection station along 2 rotation directions of carousel on the workstation 1.
A flattening mechanism and an ultrasonic welding mechanism 16 are installed at the welding station, the flattening mechanism is used for flattening the insulating film on the surface of the winding core on the fixing mechanism at the welding station, and the ultrasonic welding mechanism 16 is used for carrying out ultrasonic welding on the flattened winding core at the welding station.
The CCD detection mechanism 17 is installed at the detection station, and the CCD detection mechanism 17 is used for carrying out appearance detection on the core welded on the fixing mechanism at the detection station.
In a specific embodiment, the fixing mechanism includes a protection plate 3, a fixing plate 4, a moving plate 5 and a first driving cylinder 6, the protection plate 3 is fixed on the turntable 2, the bottom of the protection plate 3 is connected with a plurality of connecting columns 7, the connecting columns 7 penetrate through the turntable 2, the fixing plate 4 is located below the turntable 2, the fixing plate 4 is connected with the connecting columns 7, the moving plate 5 is located between the turntable 2 and the fixing plate 4, and the moving plate 5 is connected with the connecting columns 7 in a sliding fit manner. A plurality of vertically arranged limiting rods 8 and a plurality of limiting rods 8 are arranged on the movable plate 5 in a square distribution mode, and the limiting rods 8 vertically penetrate through the rotary table 2 and the protection plate 3 and are in sliding fit with the rotary table 2 and the protection plate 3. A first driving cylinder 6 is installed on the fixed plate 4 and serves to drive the moving plate 5 to move up and down in the vertical direction.
In a specific embodiment, the smoothing mechanism comprises a mounting frame 9, a moving frame 10, a sliding block 12, a pushing plate 13 and a second driving cylinder 14, wherein the mounting frame 9 is mounted on the workbench 1, the moving frame 10 is slidably mounted on the mounting frame 9 and a vertically arranged sliding rail 11 is mounted on the moving frame 10, the sliding block 12 is slidably mounted on the sliding rail 11, the pushing plate 13 is horizontally arranged above the turntable 2 and mounted on the sliding block 12, and the second driving cylinder 14 is mounted on the mounting frame 9 and used for driving the moving frame 10 to move along the radial direction of the turntable 2.
The invention provides a welding method of an ultrasonic welding device for an insulating film of a lithium battery, which comprises the following steps of:
s1, placing the winding core wrapped with the insulating film on the protection plate 3, enabling the first driving cylinder 6 to work to drive the moving plate 5 to move upwards, and enabling the limiting rods 8 to be erected around the winding core to fix the winding core and protect the winding core from excessive deviation; the rotary table 2 is rotated to drive the winding core to move to a welding station, the sliding block 12 moves downwards along the sliding rail 11, so that the push plate 13 compresses the insulating film, and the second driving air cylinder 14 works to drive the push plate 13 to move back and forth to smooth the insulating film on the surface of the winding core;
s2, placing a battery cover plate on the surface of the winding core, and welding the insulation film on the surface of the winding core to the PP plastic film of the battery cover plate by using the ultrasonic welding mechanism 16;
s3, rotating the rotary table 2 to drive the winding core to move to a detection station, after the CCD detection mechanism 17 detects that the appearance of the winding core is qualified, clamping the winding core by the turnover manipulator 15 and rotating 180 degrees to move the winding core to the protection plate 3 of the other rotary table 2, enabling the first driving cylinder 6 to work to drive the moving plate 3 to move upwards, and enabling the limiting rods 8 to be erected around the winding core to fix the winding core; the rotary table 3 is rotated to drive the winding core to move to a welding station, the sliding block 12 moves downwards along the sliding rail 11, so that the push plate 13 compresses the insulating film, and the second driving air cylinder 14 works to drive the push plate 13 to move back and forth to smooth the insulating film on the surface of the winding core;
s4, placing a battery cover plate on the surface of the winding core, and welding the insulation film on the surface of the winding core to the PP plastic film of the battery cover plate by using the ultrasonic welding mechanism 16; the rotary table is rotated to drive the roll core to move to the detection station, and the CCD detection mechanism 17 detects the qualified roll core appearance and then carries out blanking.
In the embodiment, the insulating film is welded on the battery cover plate by ultrasonic welding, and no wire drawing phenomenon occurs when the insulating film and the cover plate are fixed, so that the explosion point during cover closing welding is avoided, the leakage situation after the battery explodes the point is solved, and the laser welding qualification rate of the cover closing is greatly improved; the operation is convenient, the effect after welding is detected by the CCD detection mechanism 17 in real time, the welding effect is ensured, no adverse reaction is caused, all the defects of the thermal welding are eliminated, the one-time qualification rate of the battery is greatly improved, and the production line automation is realized.
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 (6)
1. An ultrasonic welding method for an insulating film of a lithium battery is characterized by comprising the following steps:
s1, fixing the winding core wrapped with the insulating film, and smoothing the insulating film on the surface of the winding core;
s2, placing a battery cover plate on the surface of the winding core, and welding the insulating film on the surface of the winding core to the PP plastic film of the battery cover plate by using an ultrasonic welding device;
s3, turning over the winding core and fixing again to smooth the insulation film on the surface of the winding core;
and S4, placing a battery cover plate on the surface of the winding core, and welding the insulating film on the surface of the winding core to the PP plastic film of the battery cover plate by using an ultrasonic welding device.
2. The ultrasonic welding device for the insulating film of the lithium battery is characterized by comprising a workbench (1), wherein a rotary table (2) is rotatably mounted on the workbench (1), a plurality of fixing mechanisms for fixing a winding core wrapped with the insulating film are mounted on the rotary table (2) and are distributed circumferentially, and a welding station and a detection station are sequentially arranged on the workbench (1) along the rotating direction of the rotary table (2); a smoothing mechanism and an ultrasonic welding mechanism (16) are arranged at the welding station, the smoothing mechanism is used for smoothing the insulating film on the surface of the winding core on the fixing mechanism at the welding station, and the ultrasonic welding mechanism (16) is used for carrying out ultrasonic welding on the smoothed winding core at the welding station; and a CCD detection mechanism (17) is installed at the detection station, and the CCD detection mechanism (17) is used for carrying out appearance detection on the welded roll core on the fixing mechanism at the detection station.
3. The ultrasonic welding device for the insulating film of the lithium battery as claimed in claim 2, wherein the fixing mechanism comprises a protection plate (3), a fixing plate (4), a moving plate (5) and a first driving cylinder (6), the protection plate (3) is fixed on the turntable (2), the bottom of the protection plate (3) is connected with a plurality of connecting columns (7), the connecting columns (7) penetrate through the turntable (2), the fixing plate (4) is positioned below the turntable (2), the fixing plate (4) is connected with the connecting columns (7), the moving plate (5) is positioned between the turntable (2) and the fixing plate (4), the moving plate (5) is provided with a plurality of vertically arranged limiting rods (8) and the limiting rods (8) are distributed in a square shape, the limiting rod (8) vertically penetrates through the turntable (2) and the protection plate (3), and the limiting rod (8) is in sliding fit with the turntable (2) and the protection plate (3); the first driving air cylinder (6) is arranged on the fixed plate (4) and is used for driving the moving plate (5) to move up and down in the vertical direction.
4. The ultrasonic welding device for the insulating film of the lithium battery as claimed in claim 3, wherein the moving plate (5) is connected with a plurality of connecting posts (7) in a sliding fit manner.
5. The ultrasonic welding device for the insulating film of the lithium battery as claimed in claim 2, wherein the smoothing mechanism comprises a mounting frame (9), a moving frame (10), a sliding block (12), a pushing plate (13) and a second driving cylinder (14), the mounting frame (9) is mounted on the workbench (1), the moving frame (10) is slidably mounted on the mounting frame (9) and a vertically arranged sliding rail (11) is mounted on the moving frame (10), the sliding block (12) is slidably mounted on the sliding rail (11), the pushing plate (13) is horizontally arranged above the turntable (2) and mounted on the sliding block (12), and the second driving cylinder (14) is mounted on the mounting frame (9) and used for driving the moving frame (10) to move radially along the turntable (2).
6. The ultrasonic welding device for the insulation film of the lithium battery as claimed in claim 2, wherein the number of the turntables (2) is two, and a turnover manipulator (15) is installed between the two turntables (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739938.5A CN113601850A (en) | 2021-06-30 | 2021-06-30 | Ultrasonic welding device and method for lithium battery insulating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739938.5A CN113601850A (en) | 2021-06-30 | 2021-06-30 | Ultrasonic welding device and method for lithium battery insulating film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113601850A true CN113601850A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110739938.5A Pending CN113601850A (en) | 2021-06-30 | 2021-06-30 | Ultrasonic welding device and method for lithium battery insulating film |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913029A (en) * | 2010-08-11 | 2010-12-15 | 周均 | Automatic welding machine of aluminum-nickel compound piece of lithium ion battery cover plate |
| CN103311569A (en) * | 2012-08-10 | 2013-09-18 | 宁德新能源科技有限公司 | Lithium ion power battery |
| CN106711494A (en) * | 2016-11-12 | 2017-05-24 | 广东鸿宝科技有限公司 | Final welding device for power batteries |
| CN108963177A (en) * | 2018-09-13 | 2018-12-07 | 中兴高能技术有限责任公司 | A kind of lithium battery electric core and lithium battery electric core packet insulate film method |
| CN111902901A (en) * | 2017-12-13 | 2020-11-06 | 凯尊创新有限公司 | Lithium ion battery |
| CN112388145A (en) * | 2020-10-22 | 2021-02-23 | 合肥国轩高科动力能源有限公司 | Battery roll core tab welding device and equipment |
-
2021
- 2021-06-30 CN CN202110739938.5A patent/CN113601850A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913029A (en) * | 2010-08-11 | 2010-12-15 | 周均 | Automatic welding machine of aluminum-nickel compound piece of lithium ion battery cover plate |
| CN103311569A (en) * | 2012-08-10 | 2013-09-18 | 宁德新能源科技有限公司 | Lithium ion power battery |
| CN106711494A (en) * | 2016-11-12 | 2017-05-24 | 广东鸿宝科技有限公司 | Final welding device for power batteries |
| CN111902901A (en) * | 2017-12-13 | 2020-11-06 | 凯尊创新有限公司 | Lithium ion battery |
| CN108963177A (en) * | 2018-09-13 | 2018-12-07 | 中兴高能技术有限责任公司 | A kind of lithium battery electric core and lithium battery electric core packet insulate film method |
| CN112388145A (en) * | 2020-10-22 | 2021-02-23 | 合肥国轩高科动力能源有限公司 | Battery roll core tab welding device and equipment |
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Application publication date: 20211105 |
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| RJ01 | Rejection of invention patent application after publication |