CN112824006B - Tab welding device and tab welding method - Google Patents
Tab welding device and tab welding method Download PDFInfo
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- CN112824006B CN112824006B CN201911151901.XA CN201911151901A CN112824006B CN 112824006 B CN112824006 B CN 112824006B CN 201911151901 A CN201911151901 A CN 201911151901A CN 112824006 B CN112824006 B CN 112824006B
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- 238000003466 welding Methods 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011888 foil Substances 0.000 claims abstract description 366
- 239000002131 composite material Substances 0.000 claims abstract description 183
- 230000007246 mechanism Effects 0.000 claims abstract description 160
- 238000004804 winding Methods 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims description 39
- 230000007723 transport mechanism Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 description 24
- 230000008569 process Effects 0.000 description 13
- 239000003292 glue Substances 0.000 description 8
- 230000032258 transport Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000011149 active material Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- 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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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The application provides a tab welding device and a tab welding method, and belongs to the technical field of secondary battery processing. The tab welding device includes: the first foil conveying mechanism is used for conveying the first foil. And the current collector conveying mechanism is used for conveying the composite current collector. And the second foil conveying mechanism is used for conveying the second foil. The welding device is configured to simultaneously clamp the first foil and the second foil so as to clamp the composite current collector between the first foil and the second foil and simultaneously weld the first foil and the second foil on two opposite surfaces of the composite current collector respectively. And the winding mechanism is used for winding the composite current collector with the first foil and the second foil welded on the two opposite surfaces respectively. The tab welding device can weld the first foil and the second foil on the two surfaces of the composite current collector respectively in a one-time welding mode, so that welding efficiency is improved.
Description
Technical Field
The application relates to the technical field of secondary battery processing, in particular to a tab welding device and a tab welding method.
Background
The structure of a composite current collector used in the existing secondary battery generally includes: the middle polymer layer and the metal plating layers on both surfaces of the polymer layer are usually connected to the tabs on both surfaces in order to collect the current of the metal plating layers on both surfaces.
The mode of current connection tab is usually: and the first foil is welded on the first metal layer of the composite current collector by one-time welding, and the second foil is welded on the second metal layer of the composite current collector by two-time welding, so that the welding mode is complex, and the welding efficiency is low.
Disclosure of Invention
The application aims to provide a tab welding device and a tab welding method, wherein a first foil and a second foil are respectively welded on two opposite surfaces of a composite current collector in a one-time welding mode, so that welding efficiency is improved.
In a first aspect, an embodiment of the present application provides a tab welding device, including: the first foil conveying mechanism is used for conveying the first foil. And the current collector conveying mechanism is used for conveying the composite current collector. And the second foil conveying mechanism is used for conveying the second foil. The welding device is configured to simultaneously sandwich the first foil and the second foil to sandwich the composite current collector between the first foil and the second foil and simultaneously weld the first foil and the second foil to opposite surfaces of the composite current collector, respectively. And the winding mechanism is used for winding the composite current collector with the first foil and the second foil welded on the two opposite surfaces respectively.
The first foil is conveyed by the first foil conveying mechanism, the composite current collector is conveyed by the current collector conveying mechanism, the second foil is conveyed by the second foil conveying mechanism, the three materials are conveyed to the welding equipment at the same time, the first foil is welded on the first surface of the composite current collector by the welding equipment at the same time, the second foil is welded on the second surface of the composite current collector (the first surface and the second surface are opposite two surfaces of the composite current collector, namely the first metal layer and the second metal layer of the composite current collector), and the first foil and the second foil can be welded on the two surfaces of the composite current collector respectively at one time by one welding equipment at the same time, so that the welding efficiency is improved.
In one possible embodiment, the welding device further comprises an overlapping mechanism, the overlapping mechanism comprises a first roller, the first roller is located at the rear ends of the first foil conveying mechanism, the current collector conveying mechanism and the second foil conveying mechanism, the first roller is used for dragging the overlapped first foil, the composite current collector and the second foil, at least one part of the overlapping part is in a three-layer overlapping structure, and the first roller is located at the front end of the welding device.
Before welding, the first foil, the composite current collector and the second foil are guided through the first passing roller, the first foil, the composite current collector and the second foil can be gathered together and pulled to a certain extent before welding equipment, the composite current collector is clamped between the first foil and the second foil, the first foil and the second foil can be attached to two opposite surfaces of the composite current collector at one time, the first foil and the second foil can be corresponding, and then the first foil and the second foil enter a welding head and a welding seat of the welding equipment to be welded, so that the welding effect is better, and the first foil and the second foil can be accurately and simultaneously welded on two opposite surfaces of the composite current collector at one time.
In one possible embodiment, the overlapping mechanism further comprises a second pass roller located at a front end of the first pass roller and located at a rear end of the first foil conveying mechanism, the current collector conveying mechanism and the second foil conveying mechanism, the second pass roller being for overlapping the first foil, the composite current collector and the second foil.
The first foil, the composite current collector and the second foil are compositely overlapped on the second passing roller, and then the first passing roller is used for traction, so that the first foil, the composite current collector and the second foil can be tightly attached together in a layer structure before welding, and the subsequent welding is facilitated.
In one possible embodiment, the overlapping mechanism further comprises a third pass roller located at a front end of the second pass roller, and the third pass roller is located at a rear end of the first foil conveying mechanism, the current collector conveying mechanism and the second foil conveying mechanism, the third pass roller being for overlapping the first foil and the composite current collector, the second pass roller being for overlapping the second foil and the overlapping first foil and the composite current collector.
The first foil and the composite current collector are compositely overlapped through the third passing roller, and then the second foil is compositely overlapped on the second passing roller, so that the overlapping effect of the first foil, the second foil and the composite current collector is better.
In one possible embodiment, the rolling mechanism comprises a rolling mechanism, the rolling mechanism is located at the rear end of the welding device, and the rolling mechanism is used for synchronously rolling the welding marks at the first foil, the composite current collector and the second foil.
Because the first foil and the second foil are respectively welded on two opposite surfaces of the composite current collector, after the welding is finished, the welding marks are thicker, the thickness of the welding marks can be reduced through rolling shaping of a rolling mechanism, the welding marks can be more balanced, and the probability of offset of the welded composite current collector in the conveying process is reduced.
In one possible embodiment, the rolling mechanism comprises a steel press roll and a drive roll, wherein the steel press roll and the drive roll are used for clamping the welded composite current collector and rolling the welded seal on the composite current collector. The welded composite current collector can be flattened.
In one possible embodiment, the winding mechanism further comprises a driving mechanism, the driving mechanism is located at the rear end of the rolling mechanism, and the driving mechanism is used for providing power for conveying the rolled composite current collector to the rear end. The rolling of the rolled composite current collector can be facilitated.
In one possible embodiment, the first foil conveying mechanism includes a first rectifying mechanism for rectifying a first foil in conveyance, the current collector conveying mechanism includes a second rectifying mechanism for rectifying a composite current collector in conveyance, the second foil conveying mechanism includes a third rectifying mechanism for rectifying a second foil in conveyance, and the first rectifying mechanism, the second rectifying mechanism and the third rectifying mechanism are all located at the front end of the welding apparatus.
The first foil, the composite current collector and the second foil in the conveying process can be corrected, so that the positions of the first foil, the composite current collector and the second foil relative to the welding head can be adjusted, the first foil and the second foil can be accurately welded on two opposite surfaces of the composite current collector at the same time, and the welding size on the welded composite current collector can be controlled.
In one possible embodiment, the first deviation rectifying mechanism comprises a first deviation rectifying sensor and a first deviation rectifying component which are sequentially arranged, and the first deviation rectifying sensor is located at the rear end of the first deviation rectifying component.
The first deviation rectifying sensor detects that the conveying of the first foil material is deviated, the signal is transmitted to the first deviation rectifying component, and deviation rectifying is carried out through the first deviation rectifying component.
In a second aspect, an embodiment of the present application provides a method for welding a tab on a composite current collector, which is applicable to the tab welding device, and the method includes:
The first foil is disposed on the first foil transport mechanism, the composite current collector is disposed on the current collector transport mechanism, and the second foil is disposed on the second foil transport mechanism. The first foil on the first foil conveying mechanism, the composite current collector on the current collector conveying mechanism and the second foil on the second foil conveying mechanism pass through between a welding head and a welding seat of the welding equipment. And controlling the welding head and the welding seat to extrude relatively, and simultaneously welding the first foil and the second foil on two opposite surfaces of the composite current collector respectively, so that the composite current collector is clamped between the first foil and the second foil.
The first foil and the second foil can be welded on the two opposite surfaces of the composite current collector at one time through one welding device, so that the welding efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to the drawings without inventive effort for a person skilled in the art, which also belong to the protection scope of the present application.
Fig. 1 is a schematic layer structure of a composite current collector;
FIG. 2 is a schematic view of a tab welding device;
FIG. 3 is a plan view of the first foil, composite current collector and second foil after being fed to a first pass roller;
fig. 4 is a section A-A of fig. 3.
Icon: 10-composite current collector; 11-an insulating layer; 12-a first metal layer; 13-a second metal layer; 14-a first foil; 15-a second foil; 20-tab welding device; 21-a first foil transport mechanism; 22-collector transport mechanism; 23-a second foil transport mechanism; 24-welding equipment; 25-a winding mechanism; 26-an overlap mechanism; 211-a first foil transport path; 221-collector transport path; 231-a second foil conveyance path; 212-a first foil unreeling roller; 213-a first deviation rectifying mechanism; 214-third pass roller; 215-second pass roller; 216-first pass roller; 222—collector unwind roll; 223-a second deviation correcting mechanism; 232-a second foil unwind roller; 233-a third deviation correcting mechanism; 2131-a first deviation correcting sensor; 2132-a first deskew assembly; 2133-first deviation correcting and roller passing; 2134-second deviation correcting and roller passing; 241—welding head; 242-welding seats; 243-first driving means; 251-a rolling mechanism; 252-a drive mechanism; 253—wind-up roll; 2511-steel press rolls; 2512—drive rolls; 2513-second drive means; 2521-main traction roller; 2522-glue press roll.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
Fig. 1 is a schematic layer structure of a composite current collector 10. Referring to fig. 1, a composite current collector 10 has a three-layer structure, which is an insulating layer 11 (e.g., a polymer layer) in the middle, and a first metal layer 12 and a second metal layer 13 on two surfaces of the insulating layer 11 (two opposite surfaces of the insulating layer 11), respectively, so that in order to collect currents on the first metal layer 12 and the second metal layer 13 onto the electrode posts, it is necessary to connect a first electrode tab to the first metal layer 12, and connect a second electrode tab to the second metal layer 13. The first tab and the second tab are welded to two opposite surfaces (the outer surface of the first metal layer 12 and the outer surface of the second metal layer 13) of the composite current collector 10, respectively, by the tab welding device 20. In the welding process, the composite current collector 10 is typically a long roll having a certain width, the first foil 14 is a long roll having a certain width, and the second foil 15 is also a long roll having a certain width.
In the embodiment of the present application, the composite current collector 10 to be welded with the first tab and the second tab is the composite current collector 10 after being coated with the active material layer; or may be a composite current collector 10 prior to application of the active material layer. The embodiment of the application is not limited.
Fig. 2 is a schematic structural view of a tab welding device 20; FIG. 3 is a plan view of the first foil, composite current collector and second foil after being fed to a first pass roller; fig. 4 is a section A-A of fig. 3. Referring to fig. 2-4, in an embodiment of the present application, a tab welding device 20 includes a first foil conveying mechanism 21, a current collector conveying mechanism 22, a second foil conveying mechanism 23, a welding apparatus 24, a winding mechanism 25, and an overlapping mechanism 26.
The first foil 14 (first tab) is conveyed along the first foil conveying path 211, and the first foil conveying mechanism 21 can unwind the first foil 14 from the corresponding long roll and convey the first foil along the first foil conveying path 211. The composite current collector 10 is conveyed along the current collector conveyance path 221, and the current collector conveyance mechanism 22 can unwind the composite current collector 10 from the corresponding long roll and convey along the current collector conveyance path 221. The second foil 15 (second tab) is conveyed along the second foil conveying path 231, and the second foil conveying mechanism 23 can unwind the second foil 15 from the corresponding long roll and convey along the second foil conveying path 231. The welded composite current collector 10 is transported along a winding transport path, and the welded composite current collector 10 is transported and wound by using a winding mechanism 25.
In the embodiment of the present application, the first foil conveying mechanism 21 includes a first foil unreeling roller 212 and a first deviation rectifying mechanism 213 sequentially disposed along the first foil conveying path 211. The current collector conveyance mechanism 22 includes a current collector unreeling roller 222 and a second deviation rectification mechanism 223 that are disposed in order along the current collector conveyance path 221. The second foil conveying mechanism 23 includes a second foil unreeling roller 232 and a third deviation rectifying mechanism 233 which are sequentially disposed along the second foil conveying path 231. The overlapping mechanism 26 is located at the rear ends of the first foil conveyance mechanism 21, the current collector conveyance mechanism 22, and the second foil conveyance mechanism 23, and at the front end of the welding apparatus 24.
In the embodiment of the present application, the overlapping mechanism 26 includes a third passing roller 214, a second passing roller 215 and a first passing roller 216 that are sequentially arranged, where the third passing roller 214 is located at the rear ends of the first foil conveying mechanism 21, the current collector conveying mechanism 22 and the second foil conveying mechanism 23, and the first passing roller 216 is located at the front end of the welding device 24. The first foil conveyance path 211 passes through a third passing roller 214, a second passing roller 215, and a first passing roller 216 in this order; the current collector conveyance path 221 passes through the third passing roller 214, the second passing roller 215, and the first passing roller 216 in this order; the second foil transport path 231 passes through the second pass roller 215 and the first pass roller 216 in this order. By the mutual cooperation of the third passing roller 214, the second passing roller 215 and the first passing roller 216, after the first foil 14 on the first foil conveying path 211, the composite current collector 10 on the current collector conveying path 221 and the second foil 15 on the second foil conveying path 231 pass through the first passing roller 216, the first foil 14, the composite current collector 10 and the second foil 15 are gathered and pulled at the first passing roller 216 for subsequent welding.
With continued reference to fig. 2-4, after the first foil 14, the composite current collector 10 and the second foil 15 are all conveyed onto the first roller 216, the first foil 14, the composite current collector 10 and the second foil 15 are all stacked in a top view, the first foil 14 is located above the composite current collector 10, the first foil 14 covers a portion of the composite current collector 10, one side of the composite current collector 10 in the width direction is sandwiched between the first foil 14 and the second foil 15, and one side of the composite current collector 10 in the width direction overlaps one side of the first foil 14 in the width direction and one side of the second foil 15 in the width direction, the first foil 14 and the second foil 15 are sandwiched on the same side of the composite current collector 10, the first foil 14 and the second foil 15 are substantially completely stacked, at least a portion of the overlapped portion of the first foil 14, the composite current collector 10 and the second foil 15 is in an overlapped structure (i.e., the first foil 14, the composite current collector 10 and the second foil 15 are sequentially stacked in sequence), and then the first foil 14 and the second foil 15 are welded on the two surfaces of the first foil 10 and the second foil 15 at the same time.
The first foil conveying path 211, the current collector conveying path 221 and the second foil conveying path 231 are independent conveying paths before the third passing roller 214 so as to convey the first foil 14, the composite current collector 10 and the second foil 15 respectively at the earlier stage, and the conveying of each coil can be independently regulated and do not interfere with each other. At the third passing roller 214, the first foil 14 on the first foil conveying path 211 and the composite current collector 10 on the current collector conveying path 221 are gathered and overlapped together and then pass through the second passing roller 215, meanwhile, the second foil 15 on the second foil conveying path 231 is gathered and overlapped at the second passing roller 215, that is to say, the first foil 14, the composite current collector 10 and the second foil 15 enter the first passing roller 216 after passing through the gathered and overlapped by the second passing roller 215, are overlapped and pulled at the first passing roller 216, and then enter the subsequent welding equipment 24.
In other embodiments, at the third pass roller 214, the second foil 15 on the second foil conveying path 231 and the composite current collector 10 on the current collector conveying path 221 are converged and overlapped together and then pass through the second pass roller 215, and at the same time, the first foil 14 on the first foil conveying path 211 is converged and overlapped at the second pass roller 215, that is, the first foil 14, the composite current collector 10 and the second foil 15 together pass through the converged and overlapped of the second pass roller 215 and then enter the first pass roller 216, are overlapped and pulled at the first pass roller 216, and then enter the subsequent welding equipment 24. In some embodiments, either the first foil transport mechanism 21 or the second foil transport mechanism 23 may be selected for use in order to increase the range of use of the tab welding device. The embodiment of the application is not limited.
In order to convey the first foil 14, the composite current collector 10 and the second foil 15 respectively, the first foil conveying mechanism 21 further includes a plurality of passing rollers, a tension mechanism, and the like, so that the first foil 14 on the first foil conveying path 211 may be in a tensioned state during the conveying process, so as to convey the first foil 14. The current collector conveying mechanism 22 may also include a plurality of rollers, a tension mechanism, etc., which may put the composite current collector 10 on the current collector conveying path 221 under tension during conveying so as to convey the composite current collector 10. The second foil conveying mechanism 23 further includes a plurality of rollers, a tension mechanism, etc., which can make the second foil 15 on the second foil conveying path 231 be in a tensioned state during the conveying process, so as to convey the second foil 15. The embodiments of the present application are not described in detail.
With continued reference to fig. 2, further, after the first deviation rectifying mechanism 213, the second deviation rectifying mechanism 223, and the third deviation rectifying mechanism 233 convey the first foil 14, the composite current collector 10, and the second foil 15 onto the first passing roller 216, the first foil 14, the composite current collector 10, and the second foil 15 may be overlapped according to a preset relative position (for example, as shown in fig. 4). The first deviation rectifying mechanism 213, the second deviation rectifying mechanism 223, and the third deviation rectifying mechanism 233 are described below. The first deviation rectifying mechanism 213, the second deviation rectifying mechanism 223 and the third deviation rectifying mechanism 233 have the same structure and similar functions, and only the deviation rectifying objects are different, the deviation rectifying object of the first deviation rectifying mechanism 213 is the first foil 14, and the first deviation rectifying mechanism 213 is used for rectifying the first foil 14 in conveying. The deviation rectifying object of the second deviation rectifying mechanism 223 is the composite current collector 10, and the second deviation rectifying mechanism 223 is used for rectifying the composite current collector 10 in conveying. The deviation rectifying object of the third deviation rectifying mechanism 233 is the second foil 15, and the third deviation rectifying mechanism 233 is used for rectifying the second foil 15 in conveying. So that the first foil 14, the composite current collector 10 and the second foil 15 can be accurately positioned at the corresponding positions when all the three are conveyed to the first passing roller 216. The structure of the first deviation correcting mechanism 213 and the operation principle of the first deviation correcting mechanism 213 will be specifically described below.
In the embodiment of the present application, the first deviation rectifying mechanism 213 includes a first deviation rectifying sensor 2131 and a first deviation rectifying component 2132 that are sequentially disposed, where the first deviation rectifying sensor 2131 is located at the rear end of the first deviation rectifying component 2132. That is, the first foil transport path 211 passes through the first foil unwind roller 212, the first rectifying assembly 2132, and the first rectifying sensor 2131 in sequence. During the process of conveying the first foil 14, the first foil passes through the first deviation rectifying component 2132 and then passes through the first deviation rectifying sensor 2131.
Optionally, the first deviation rectifying mechanism 213 further includes a first deviation rectifying controller (not shown), the first deviation rectifying component 2132 includes a deviation rectifying motor (not shown), a deviation rectifying frame (not shown), a first deviation rectifying roller 2133 and a second deviation rectifying roller 2134, an output shaft of the deviation rectifying motor is connected to the deviation rectifying frame, the first deviation rectifying roller 2133 and the second deviation rectifying roller 2134 are both fixed on the deviation rectifying frame, the first deviation rectifying sensor 2131 is electrically connected to the first deviation rectifying controller, and the first deviation rectifying controller is electrically connected to the deviation rectifying motor.
The first foil 14 sequentially passes through the second deviation rectifying roller 2134, the first deviation rectifying roller 2133 and the first deviation rectifying sensor 2131 in the conveying process. When the first deviation correcting sensor 2131 detects that the first foil 14 is right in conveying, a first signal is obtained, the first signal is sent to the first deviation correcting controller, after the first deviation correcting controller receives the first signal, the first signal is processed, a second signal is sent to the deviation correcting motor, after the deviation correcting motor receives the second signal, the deviation correcting frame is controlled to deviate leftwards, and the first deviation correcting roller 2133 and the second deviation correcting roller 2134 fixed on the deviation correcting frame deviate leftwards, so that the first foil 14 is corrected.
Correspondingly, when the first deviation correcting sensor 2131 detects that the conveying of the first foil 14 is deviated to the left, a third signal is obtained, the third signal is sent to the first deviation correcting controller, after the first deviation correcting controller receives the third signal, the third signal is processed, a fourth signal is sent to the deviation correcting motor, after the deviation correcting motor receives the fourth signal, the deviation correcting frame is controlled to deviate to the right, and the first deviation correcting roller 2133 and the second deviation correcting roller 2134 fixed on the deviation correcting frame deviate to the right, so that the deviation of the first foil 14 is corrected. When the first deviation rectifying controller no longer sends a signal to the deviation rectifying motor, the deviation rectifying process of the first foil 14 is indicated to be completed, and the first foil 14 is conveyed according to a preset position.
The first deviation rectifying mechanism 213 rectifies the conveying process of the first foil 14, the second deviation rectifying mechanism 223 rectifies the conveying process of the composite current collector 10, and the third deviation rectifying mechanism 233 rectifies the conveying process of the second foil 15, so that when the first foil 14, the composite current collector 10 and the second foil 15 are on the first passing roller 216, a layered structure formed by overlapping the first foil 14, the composite current collector 10 and the second foil 15 can be formed, and the three are not completely overlapped but partially overlapped (as shown in fig. 4), so that the positions of the first foil 14, the composite current collector 10 and the second foil 15 relative to the welding equipment 24 can be adjusted, and the welding size on the welded composite current collector 10 can be controlled.
The first foil 14 is transported to the outer surface of the first metal layer 12 of the composite current collector 10 by the first foil transport mechanism 21, and the second foil transport mechanism 23 transports the second foil 15 to the outer surface of the second metal layer 13 of the composite current collector 10. After the first foil 14, the composite current collector 10, and the second foil 15 are overlapped, they are transported together to the welding device 24, and the first foil 14, the composite current collector 10, and the second foil 15 are welded at the welding device 24 in a state where they are overlapped and not welded at the first passing roller 216.
In the embodiment of the present application, the welding apparatus 24 is configured to sandwich the first foil 14 and the second foil 15 at the same time, so as to sandwich the composite current collector 10 between the first foil 14 and the second foil 15 and weld the first foil 14 and the second foil 15 at opposite surfaces of the composite current collector 10 at the same time, respectively.
Further, the welding device 24 includes a welding head 241 and a welding seat 242, the welding head 241 abuts against the first foil 14, the welding seat 242 abuts against the second foil 15, after the first foil 14, the composite current collector 10 and the second foil 15 are converged on the first roller 216, the first foil 14 and the second foil 15 together pass between the welding head 241 and the welding seat 242, and the welding device 24 is used for simultaneously welding the first foil 14 and the second foil 15 on two opposite surfaces of the composite current collector 10 (the welding head 241 and the welding seat 242 are mutually extruded, the first foil 14 is welded on the first metal layer 12 of the composite current collector 10, and the second foil 15 is welded on the second metal layer 13 of the composite current collector 10), so that the composite current collector 10 is sandwiched between the first foil 14 and the second foil 15. In order to achieve the above conveying objective, please continue with fig. 2, the first foil conveying path 211, the current collector conveying path 221 and the second foil conveying path 231 are respectively disposed in sequence from top to bottom, that is, the current collector conveying path 221 is sandwiched between the first foil conveying path 211 and the second foil conveying path 231.
After the first foil 14 is conveyed through the first foil conveying path 211, the composite current collector 10 is conveyed through the current collector conveying path 221, and the second foil 15 is conveyed through the second foil conveying path 231, collected at the first passing roller 216, and then passed through the welding device 24 together, and welded at the welding device 24. Optionally, the welding apparatus 24 further includes a welding motor (not shown), the welding head 241 is an ultrasonic rolling head 241, an output shaft of the welding motor is connected to a connecting shaft of the ultrasonic rolling head 241, a first driving device 243 (such as a cylinder, a hydraulic cylinder, etc.) is connected to the welding base 242, the first foil 14, the composite current collector 10 and the second foil 15 pass through a welding station of the welding base 242 together, the cylinder rises during welding and keeps pressure stable during welding, the ultrasonic rolling head 241 emits high-frequency ultrasonic vibration, and the ultrasonic rolling head 241 is driven by the welding motor to roll, so that the first foil 14 and the second foil 15 are welded on two surfaces of the composite current collector 10 simultaneously, and meanwhile, the welded composite current collector 10 is conveyed to the rear end so as to continue to weld the subsequent first foil 14 and the second foil 15 on two surfaces of the composite current collector 10.
With continued reference to fig. 4, the welded composite current collector 10 has a three-layer structure, wherein the middle layer structure is the composite current collector 10, the upper layer structure is the first foil 14, the lower layer structure is the second foil 15, the first foil 14 and the second foil 15 are partially overlapped with the composite current collector 10, the unwelded portion of the composite current collector 10 is used for coating an active material layer, the unwelded portion of the first foil 14 and the unwelded portion of the second foil 15 are used for connecting a pole, and the current on the first metal layer 12 and the second metal layer 13 of the composite current collector 10 is led out through the first foil 14 and the second foil 15.
After the composite current collector 10 is welded on the welding device 24, the welded composite current collector 10 is wound up through the winding mechanism 25. The winding mechanism 25 includes a rolling mechanism 251, a driving mechanism 252, and a winding roller 253, which are sequentially disposed along the winding conveying path, the rolling mechanism 251 being located at the rear end of the welding device 24. The rolling mechanism 251 is used for synchronously rolling the welding marks at the first foil 14, the composite current collector 10 and the second foil 15, so that the welding marks of the welded composite current collector 10 are smoother, and the welded composite current collector 10 is convenient to roll by the rolling roller 253.
It should be noted that: with continued reference to fig. 4, the welded composite current collector 10 is not of a uniform thin film structure, and has a relatively thick thickness at the welding points where the first foil 14, the composite current collector 10 and the second foil 15 overlap, and a relatively thin thickness at the non-overlapping positions, and if the thickness is not uniform, the welded composite current collector 10 is easily deviated during transportation during winding. Therefore, the thickness of the welding marks is reduced by the rolling mechanism 251, thereby reducing the thickness difference of each position of the welded composite current collector 10 so as to better wind up the welded composite current collector 10.
Optionally, the rolling mechanism 251 includes a steel press roll 2511 and a drive roll 2512, where the steel press roll 2511 and the drive roll 2512 are used to sandwich the welded composite current collector 10 and form a roll on the welded seal on the composite current collector 10. When the welded composite current collector 10 is subjected to rolling shaping, the steel press roller 2511 is located above the first foil 14, a second driving device 2513 (such as a cylinder, a hydraulic cylinder and the like) is connected to the steel press roller 2511, the driving roller 2512 is located below the second foil 15, and the cylinder controls the steel press roller 2511 to lift or press down, so that the welded part is subjected to rolling shaping. The steel compression roller 2511 has a certain pressure to the driving roller 2512, the roller surface linear speed of the driving roller 2512 is consistent with the linear speed of the welded composite current collector 10, and the welded composite current collector 10 is not damaged in the process of conveying the welded composite current collector, so that the welded welding is prevented from being separated.
In the embodiment of the application, the traction speed of the welded composite current collector 10 and the linear speed of the ultrasonic rolling head 241 can be kept consistent by the arrangement of the driving mechanism 252 so as to convey the welded composite current collector 10.
Optionally, the driving mechanism 252 includes a main traction roller 2521 and a glue roller 2522, and the main traction roller 2521 and the glue roller 2522 are used for driving the rolled composite current collector 10. The glue compression roller 2522 presses the welded composite current collector 10, so that the pressure between the welded composite current collector 10 and the main traction roller 2521 can be increased, friction force is increased, and the main traction roller 2521 can drive the welded composite current collector 10 to move backwards and avoid slipping. And the surface of the glue compression roller 2522 is made of rubber, so that the welded composite current collector 10 is prevented from being damaged.
Further, the outer diameter of the glue roll 2522 is smaller than the outer diameter of the main pulling roll 2521. The outer diameter of the main traction roller 2521 is larger than that of the glue compression roller 2522, the main traction roller 2521 has a larger wrap angle, so that a larger friction force with the welded composite current collector 10 is ensured, and meanwhile, a pressure bearing position is provided for the glue compression roller 2522, so that the welded composite current collector 10 can be better towed.
It should be noted that: the driving roller 2512 has the same rotational speed as the main pulling roller 2521 in order to transport the welded composite current collector 10. The winding mechanism 25 further comprises a plurality of passing rollers, a tension mechanism, a deviation correcting mechanism and the like, so that the welded composite current collector 10 on the winding conveying path is in a tensioning state in the conveying process, and the welded composite current collector 10 is conveyed and wound. The embodiments of the present application are not described in detail.
In the embodiment of the present application, the method for welding the tab on the composite current collector 10 by using the tab welding arrangement includes:
(1) The first foil 14 is set on the first foil conveyor 21, the composite current collector 10 is set on the current collector conveyor 22, and the second foil 15 is set on the second foil conveyor 23.
The first foil unreeling roller 212 unreels the first foil 14, so that the first foil 14 sequentially passes through the first deviation rectifying mechanism 213, the third passing roller 214, the second passing roller 215 and the first passing roller 216 along the direction of the first foil conveying path 211. The current collector unreeling roller 222 unreels the composite current collector 10, and the composite current collector 10 sequentially passes through the second deviation correcting mechanism 223, the third passing roller 214, the second passing roller 215 and the first passing roller 216 along the direction of the current collector conveying path 221. The second foil unreeling roller 232 unreels the second foil 15, so that the second foil 15 sequentially passes through the third deviation rectifying mechanism 233, the second passing roller 215 and the first passing roller 216 along the direction of the second foil conveying path 231. The first foil 14 and the composite current collector 10 are gathered at the third roller 214 into the second roller 215, and after being gathered at the second roller 215 with the second foil 15, enter the first roller 216 to form a layer structure of the composite current collector 10 sandwiched between the first foil 14 and the second foil 15.
(2) The first foil 14 on the first foil conveyor 21, the composite current collector 10 on the current collector conveyor 22, and the second foil 15 on the second foil conveyor 23 pass between the welding head 241 and the anvil 242 of the welding device 24.
After the first foil 14 on the first foil conveying path 211, the composite current collector 10 on the current collector conveying path 221, and the second foil 15 on the second foil conveying path 231 are converged and overlapped on the first passing roller 216, the first foil 14 is located on the outer surface of the first metal layer 12 of the composite current collector 10, the second foil 15 is located on the outer surface of the second metal layer 13 of the composite current collector 10, and the first foil 14 and the second foil 15 are located on the same side of the composite current collector 10, the welding heads 241 and the welding seats 242 are together passed.
(3) The welding head 241 and the welding seat 242 are controlled to be extruded relatively, and meanwhile, the first foil 14 and the second foil 15 are respectively welded on two opposite surfaces of the composite current collector 10, so that the composite current collector 10 is clamped between the first foil 14 and the second foil 15.
The cylinder is controlled to ascend, so that the welding seat 242 presses the second foil 15, the ultrasonic rolling head 241 emits high-frequency ultrasonic vibration, the ultrasonic rolling head 241 is driven to roll by the welding motor, and meanwhile, the first foil 14 and the second foil 15 are respectively welded on two opposite surfaces of the composite current collector 10.
(4) The welded composite current collector 10 is disposed on the winding conveying path and wound through the winding conveying path.
The welded composite current collector 10 passes through the rolling mechanism 251 and the driving mechanism 252 in sequence along the direction of the rolling conveying path, and is rolled by the rolling roller 253.
The tab welding device and the tab welding method provided by the embodiment of the application have the beneficial effects that:
(1) The first foil 14 and the second foil 15 can be welded on the two opposite surfaces of the composite current collector 10 at one time, so that the composite current collector 10 is clamped between the first foil 14 and the second foil 15, and the welding efficiency can be improved.
(2) Before the first foil 14, the composite current collector 10 and the second foil 15 are assembled, the conveying speed, the conveying tension and the conveying position of the first foil 14, the composite current collector 10 and the second foil 15 can be independently adjusted, and the conveying positions are not interfered with each other.
(3) After the welded composite current collector 10 passes through the rolling mechanism 251 and the driving mechanism 252, the composite current collector is rolled up, so that the rolling up can be smoother.
The above description is only a few embodiments of the present application and is not intended to limit the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a utmost point ear welding set which characterized in that, utmost point ear welding set includes:
the first foil conveying mechanism is used for conveying the first foil;
The current collector conveying mechanism is used for conveying the composite current collector;
The second foil conveying mechanism is used for conveying the second foil;
A welding device configured to sandwich the first foil and the second foil simultaneously to sandwich the composite current collector between the first foil and the second foil and to weld the first foil and the second foil to opposite surfaces of the composite current collector, respectively; and
And the winding mechanism is used for winding the composite current collector with the first foil and the second foil welded on the two opposite surfaces respectively.
2. The tab welding device of claim 1, further comprising an overlap mechanism comprising a first over-roller positioned at a rear end of the first foil conveying mechanism, the current collector conveying mechanism, and the second foil conveying mechanism, the first over-roller configured to pull at least a portion of the overlapped first foil, the composite current collector, and the second foil in a three-over-one configuration, the first over-roller positioned at a front end of the welding apparatus.
3. The tab welding device of claim 2, wherein the overlap mechanism further comprises a second pass roller positioned at a front end of the first pass roller and positioned at a rear end of the first foil transport mechanism, the current collector transport mechanism, and the second foil transport mechanism, the second pass roller being configured to overlap the first foil, the composite current collector, and the second foil.
4. The tab welding device of claim 3 wherein the overlap mechanism further comprises a third pass roller positioned at a front end of the second pass roller and positioned at a rear end of the first foil transport mechanism, the current collector transport mechanism, and the second foil transport mechanism, the third pass roller being configured to overlap the first foil and the composite current collector, the second pass roller being configured to overlap the second foil and the overlapped first foil and the composite current collector.
5. The tab welding device of any one of claims 1-4, wherein the rolling mechanism comprises a rolling mechanism located at a rear end of the welding apparatus, the rolling mechanism being configured to synchronously roll the weld at the first foil, the composite current collector, and the second foil.
6. The tab welding device according to claim 5, wherein the rolling mechanism comprises a steel press roller and a drive roller for sandwiching the welded composite current collector and rolling the welded seal on the composite current collector.
7. The tab welding device of claim 5 wherein the winding mechanism further comprises a drive mechanism located at a rear end of the rolling mechanism, the drive mechanism for providing power to transport the rolled composite current collector to the rear end.
8. The tab welding device of any one of claims 1-4, wherein the first foil conveying mechanism comprises a first rectifying mechanism for rectifying the first foil in conveyance, the current collector conveying mechanism comprises a second rectifying mechanism for rectifying the composite current collector in conveyance, the second foil conveying mechanism comprises a third rectifying mechanism for rectifying the second foil in conveyance, and the first rectifying mechanism, the second rectifying mechanism and the third rectifying mechanism are all located at the front end of the welding apparatus.
9. The tab welding device of claim 8, wherein the first deviation rectifying mechanism comprises a first deviation rectifying sensor and a first deviation rectifying assembly, which are sequentially arranged, and the first deviation rectifying sensor is located at the rear end of the first deviation rectifying assembly.
10. A method of welding a tab, adapted for use in a tab welding device as claimed in any one of claims 1 to 9, the method comprising:
The first foil is arranged on the first foil conveying mechanism, the composite current collector is arranged on the current collector conveying mechanism, and the second foil is arranged on the second foil conveying mechanism;
a first foil on the first foil conveying mechanism, a composite current collector on the current collector conveying mechanism and a second foil on the second foil conveying mechanism pass through between a welding head and a welding seat of the welding equipment;
And controlling the welding head and the welding seat to extrude relatively, and simultaneously welding the first foil and the second foil on two opposite surfaces of the composite current collector respectively, so that the composite current collector is clamped between the first foil and the second foil.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151901.XA CN112824006B (en) | 2019-11-21 | 2019-11-21 | Tab welding device and tab welding method |
| PCT/CN2021/071680 WO2021098890A1 (en) | 2019-11-21 | 2021-01-14 | Tab soldering apparatus and tab soldering method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911151901.XA CN112824006B (en) | 2019-11-21 | 2019-11-21 | Tab welding device and tab welding method |
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| CN112824006A CN112824006A (en) | 2021-05-21 |
| CN112824006B true CN112824006B (en) | 2024-04-30 |
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| CN113725396B (en) * | 2021-09-02 | 2024-03-12 | 上海联净电子科技有限公司 | Current collector production method and production device |
| CN114700604A (en) * | 2022-03-18 | 2022-07-05 | 江阴纳力新材料科技有限公司 | Ultrasonic welding method for tabs |
| WO2023174410A1 (en) * | 2022-03-18 | 2023-09-21 | 江阴纳力新材料科技有限公司 | Tab ultrasonic welding method and tab welding device |
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