CN114799478A - Be used for electric core utmost point post welded integral type ultrasonic welding machine - Google Patents
Be used for electric core utmost point post welded integral type ultrasonic welding machine Download PDFInfo
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- CN114799478A CN114799478A CN202210502657.2A CN202210502657A CN114799478A CN 114799478 A CN114799478 A CN 114799478A CN 202210502657 A CN202210502657 A CN 202210502657A CN 114799478 A CN114799478 A CN 114799478A
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- welding
- ultrasonic welding
- plate
- electric core
- battery cell
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- 238000003466 welding Methods 0.000 title claims abstract description 153
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 abstract description 4
- 239000005030 aluminium foil Substances 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
-
- 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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- 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
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
An integrated ultrasonic welding machine for welding a battery cell pole is disclosed. The welding device comprises a workbench, two ultrasonic welding devices and a cell clamping device, wherein the two ultrasonic welding devices and the cell clamping device are arranged on the workbench, the two ultrasonic welding devices are distributed at intervals, one ultrasonic welding device is used for welding a copper pole column of a cell, the other ultrasonic welding device is used for welding an aluminum pole column of the cell, a line rail for the cell clamping device to be in sliding fit is further arranged on the workbench, so that the cell clamping device can slide to any ultrasonic welding device along the line rail, the corresponding pole columns of the cell are welded through the two ultrasonic welding devices respectively, the line rail is linear, in-place baffles for the cell clamping device to be in abutting contact fit are arranged at the two ends of the line rail respectively, and after the cell clamping device slides to any in-place baffle, the pole columns on the cell fixed by the cell clamping device are positioned at welding positions corresponding to the ultrasonic welding devices; the method is used for improving the welding quality and the welding efficiency of the battery cell pole.
Description
Technical Field
The invention relates to the field of processing and production of lithium battery cores, in particular to an integrated ultrasonic welding machine for welding a battery core pole.
Background
The electric core of lithium cell is usually including many copper foils and the aluminium foil that distributes each other crisscross, all has the strip on copper foil and the aluminium foil and extends the area in order to form utmost point ear, and the utmost point ear of all copper foils distributes in one side of electric core tip and forms negative pole utmost point post, and the utmost point ear of all aluminium foils distributes in the opposite side of electric core tip and forms anodal utmost point post, forms electric core after welding equipment carries out the difference welded fastening respectively with all copper foil utmost point ears and all aluminium foil utmost point ears, carries out the series-parallel combination formation battery module of difference with electric core again.
Lack the welding tool to utmost point ear among the prior art, lead to the welding quality of utmost point ear to be nonstandard, different operating personnel's welding level and welding position's selection is different the end, leads to the outward appearance of electric core product not unified from this, and welding quality is difficult to guarantee.
Disclosure of Invention
The invention aims to provide an integrated ultrasonic welding machine for welding a battery cell pole so as to improve the welding quality and the welding efficiency of the battery cell pole.
In order to solve the technical problems, the invention adopts the specific scheme that: an integrated ultrasonic welding machine for welding a cell pole comprises a workbench, two ultrasonic welding devices and a cell clamping device, wherein the two ultrasonic welding devices are arranged on the workbench and are distributed at intervals, one ultrasonic welding device is used for welding a copper pole column of the battery core, the other ultrasonic welding device is used for welding an aluminum pole column of the battery core, a wire rail for the battery cell clamping device to be matched with in a sliding way is also arranged on the workbench, so that the battery cell clamping device can slide to any ultrasonic welding device along the wire rail, and the corresponding pole columns of the battery cell are respectively welded through two ultrasonic welding devices, the line rails are linear, the two ends of the wire track are respectively provided with an in-place baffle plate which is matched with the electric core clamping device in a propping and contacting way so that the electric core clamping device can slide to any one in-place baffle plate, the pole columns on the battery cell fixed by the battery cell clamping device are all positioned at the welding positions corresponding to the ultrasonic welding device;
the ultrasonic welding device is provided with a fixed welding head and a movable welding head positioned above the fixed welding head, and the movable welding head can lift along the vertical direction so as to form a welding position between the fixed welding head and the movable welding head;
the battery cell clamping device comprises a sliding plate arranged on the line rail in a sliding manner, a lifting plate arranged on the sliding plate in a lifting manner and a battery cell clamping assembly detachably connected to the lifting plate; the electric core clamping assembly is provided with a clamping groove for positioning and placing an electric core and a clamping cover plate hinged to one side of the clamping groove, facing the ultrasonic welding device, is provided with an opening for enabling a polar column of the electric core in the clamping groove to extend into a welding position, the bottom of the opening is provided with an extension plate for supporting the lower edge of the polar column of the electric core, and a pressing plate for tightly pressing the base part of the polar column of the electric core on the extension plate is arranged at a position, corresponding to the opening, on the clamping cover plate; the lifting plate is sleeved on a plurality of sliding columns fixed on the sliding plate in a sliding manner, the sliding columns are provided with first springs used for jacking the lifting plate upwards, and the sliding plate is further provided with a quick pressure head used for pressing the lifting plate downwards so that an extension plate in the battery cell clamping assembly is abutted against the upper edge of the fixed welding head.
Preferably, the workbench is provided with two parallel wire rails, the two wire rails are fixed on a seat plate arranged on the workbench, and the bottom of the sliding plate is correspondingly provided with a sliding block respectively matched with the two wire rails in a sliding manner.
Preferably, the pressing plate is L-shaped, one side of the pressing plate is fixed on the clamping cover plate through a bolt, and the other side of the pressing plate is flush with the end part of the clamping cover plate and is used for pressing a pole of the battery cell.
Preferably, the clamping groove is provided with a positioning mechanism for pushing the battery cell in the clamping groove towards the ultrasonic welding equipment, and the positioning mechanism comprises a push plate arranged in the clamping groove in a sliding manner and a second spring fixed between the push plate and the end part of the clamping groove far away from the ultrasonic welding device.
Preferably, the quick pressure head sets up on being fixed in the stand on the slide, and the pressure output end of quick pressure head and the contact cooperation of going up along of lifter plate.
Advantageous effects
The workbench is provided with an ultrasonic welding device for welding a battery cell pole and a battery cell clamping device for clamping and fixing a battery cell. The position of the welding position in the ultrasonic welding device is relatively fixed, and the electric core clamping device can clamp and fix the electric core and then move along the horizontal direction and the vertical direction, so that the pole on the electric core can be tightly pressed and fixed in the welding position. And then guarantee welding quality and outward appearance by ultrasonic welding device, avoid the utmost point ear in the utmost point post not hard up curling in welding process by the effect of compressing tightly of electric core clamping device to electric core utmost point post, lead to welding back monolithic utmost point ear to pile up, compare the welding quality that has further improved with the welding mode among the prior art.
The invention is provided with two ultrasonic welding devices, a battery cell clamping device and a linear rail for the battery cell clamping device to slide back and forth between the two ultrasonic welding devices. Two ultrasonic devices are used for welding the copper utmost point post and the aluminium utmost point post of electric core respectively, only need once press from both sides the dress location to electric core in welding process, can realize the tack weld of two utmost point posts respectively to the welding efficiency of electric core utmost point post has been improved greatly.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of a matching relationship between an ultrasonic welding device and a cell clamping device in the present invention;
fig. 3 is a schematic structural diagram of the cell clamping device in fig. 2 after a cell clamping assembly is closed;
fig. 4 is a partially enlarged schematic view of a side of the cell clamping device facing the ultrasonic welding device in fig. 3;
fig. 5 is a schematic perspective view of a cell clamping device;
the labels in the figure are: 1. the working table, 2, ultrasonic welding device, 201, move the bonding tool, 202, decide the bonding tool, 3, electric core clamping device, 4, electric core, 401, utmost point post, 5, electric core press from both sides dress subassembly, 501, extension board, 502, press from both sides dress groove, 503, clamp plate, 504, press from both sides dress apron, 6, bedplate, 7, line rail, 8, slide, 9, lifter plate, 10, stand, 11, quick pressure head, 12, push pedal, 13, second spring, 14, traveller, 15, first spring, 16, the baffle that targets in place.
Detailed Description
As shown in fig. 1, the integrated ultrasonic welding machine for welding the battery cell pole of the invention comprises a workbench 1, and two ultrasonic welding devices 2 and a battery cell clamping device 3 which are arranged on the workbench 1. The two ultrasonic welding devices 2 are spaced from each other in the left-right direction, and the welding positions thereof are oriented in the same direction and are oriented forward in fig. 1. The two ultrasonic welding devices 2 have the same structure, the welding parameters of one ultrasonic welding device 2 are adjusted to be used for welding the copper pole column 401 of the battery core 4, and the welding parameters of the other ultrasonic welding device 2 are adjusted to be used for welding the aluminum pole column 401 of the battery core 4. Two wire rails 7 for the sliding fit of the battery cell clamping device 3 are further arranged in front of the two ultrasonic welding devices 2 on the workbench 1, and the two wire rails 7 are fixed on a seat plate 6 arranged on the workbench 1. After clamping the battery cell 4 in the battery cell clamping device 3, the battery cell 4 can be moved to the two ultrasonic welding devices 2 respectively by moving the battery cell clamping device 3 along the line rail 7, so that the aluminum and copper tabs of the battery cell 4 can be welded respectively by the two ultrasonic welding devices 2. The two ends of the wire rail 7 are respectively provided with an in-place baffle 16, and after the cell clamping device 3 is pushed against any in-place baffle 16 in the sliding direction, the aluminum and copper pole columns 401 on the cell 4 are just positioned in the welding positions of the corresponding ultrasonic welding devices 2.
As shown in fig. 2 and 3, the ultrasonic welding apparatus 2 has a fixed horn 202 and a movable horn 201 located above the fixed horn 202, and the movable horn 201 is vertically movable up and down to form the above-described welding position between the fixed horn 202 and the movable horn 201. After the electric core 4 pole 401 is inserted into the welding position, the welding position can be moved downwards by moving the welding head 201 to clamp the pole 401, so that ultrasonic welding is performed. The ultrasonic welding device 2 is a conventional technique in the art, and adjusting the corresponding parameters to weld the aluminum pole column 401 and the copper pole column 401 respectively is also a conventional technique in the art, and is not described in detail.
As shown in fig. 2 to 5, the battery cell clamping device 3 includes a sliding plate 8 slidably disposed on the wire rail 7, a lifting plate 9 liftably disposed on the sliding plate 8, and a battery cell clamping assembly 5 detachably connected to the lifting plate 9.
The cell clamping assembly 5 mainly comprises a clamping groove 502 and a clamping cover plate 504 hinged on one side of the clamping groove 502. The clamping groove 502 is provided with a groove corresponding to the shape of the battery cell 4 for positioning and placing the battery cell 4, the groove is designed to be closed at the periphery and have an open top, and the open position of the top is covered by an openable clamping cover plate 504. The clamping groove 502 is provided with two openings at the left side position of the above-mentioned type groove towards the ultrasonic welding device 2, so that the pole 401 on the battery cell 4 placed in the type groove can be extended out of the opening and enter the welding position of the ultrasonic welding device 2 for welding. The bottom of the clamping groove 502 is provided with an extension plate 501 corresponding to the size of the pole 401 at a position corresponding to the opening, so that the lower edge of the pole 401 is supported by the extension plate 501. Pressing plates 503 are provided at positions corresponding to the openings on the sandwiching cover plate 504. The pressing plate 503 is L-shaped, one side of which is fixed to the clamping cover 504 by bolts, and the other side of which is flush with the left end of the clamping groove 502, so that the non-welded base of the pole 401 near the battery cell 4 is pressed against the extension plate 501 by the end of the vertical section of the pressing plate 503 in a state where the clamping cover 504 is closed to the clamping groove 502. Thereby preventing the tab in the post 401 from shifting before or during welding.
The longitudinal length of the clamping groove 502 in this embodiment is long, and a positioning mechanism for pushing the battery cell 4 in the clamping groove 502 toward the ultrasonic welding apparatus is disposed in the clamping groove 502. The positioning mechanism comprises a push plate 12 slidably disposed in the clamping groove 502 and a second spring 13 fixed between the push plate 12 and the end of the clamping groove 502 away from the ultrasonic welding device 2. After the battery cells 4 with various lengths are placed in the clamping groove 502, the left end of the battery cell 4 can be pushed to the left end of the clamping groove 502 by the pushing plate 12 under the action of the elastic force of the second spring 13, so that the pole 401 at the left end of the battery cell 4 extends out of the opening, and the invention is suitable for welding the poles 401 of the battery cells 4 with different lengths.
The lifting plate 9 is slidably sleeved on a plurality of sliding columns 14 fixed on the sliding plate 8, and the sliding columns 14 are provided with first springs 15 for jacking the lifting plate 9 upwards. After the battery cell 4 is placed in the clamping groove 502, the extending plate 501 can be automatically positioned between the fixed welding head 202 and the movable welding head 201 under the upward elastic force of the first spring 15. The slide plate 8 is further provided with a quick press head 11 for pressing the lifting plate 9 downward to make the extension plate 501 in the cell clamping assembly 5 abut against the upper edge of the fixed welding head 202. The rapid pressing head 11 is arranged on a vertical column 10 fixed on the sliding plate 8, and the pressure output end of the rapid pressing head 11 is in contact fit with the upper edge of the lifting plate 9.
The application process of the invention is as follows:
first, as shown in fig. 1, the cell clamping device 3 is moved along the wire rail 7 to the ultrasonic welding device 2 on the left side, and as shown in fig. 2, two openings on the clamping groove 502 are located on both sides of the welding position of the ultrasonic welding device 2. The battery cell 4 is placed in the clamping groove 502, so that the positive and negative poles 401 of the battery cell 4 are respectively located at two sides of the welding position, and then the clamping cover plate 504 is closed, as shown in fig. 3.
Then, the cell clamping device 3 is moved to the right-hand-side in-place baffle 16 along the line rail 7, at this time, one of the poles 401 of the cell 4 is located in the welding position, the rapid press head 11 is pressed down to make the lifting plate 9 descend to the extension plate 501 and fall on the fixed welding head 202, and the ultrasonic welding device 2 is started to make the movable welding head 201 descend to the pole 401 to start welding.
After the welding of the pole 401 is completed, the cell clamping device 3 is moved to the ultrasonic welding device 2 on the right side in fig. 1 according to the above steps, and the pole 401 made of another material is welded.
Claims (5)
1. The utility model provides an integral type ultrasonic welding machine for electric core utmost point post welded which characterized in that: the welding device comprises a workbench (1), two ultrasonic welding devices (2) and an electric core clamping device (3) which are arranged on the workbench (1), wherein the two ultrasonic welding devices (2) are distributed at intervals, one ultrasonic welding device (2) is used for welding a copper pole (401) of an electric core (4), the other ultrasonic welding device (2) is used for welding an aluminum pole (401) of the electric core (4), a wire rail (7) for the sliding fit of the electric core clamping device (3) is further arranged on the workbench (1), so that the electric core clamping device (3) can slide to any ultrasonic welding device (2) along the wire rail (7), the corresponding poles (401) of the electric core (4) are welded through the two ultrasonic welding devices (2) respectively, the wire rail (7) is linear, in-position baffles (16) for the abutting contact fit of the electric core clamping device (3) are arranged at the two ends of the wire rail (7) respectively, after the battery cell clamping device (3) slides to any in-place baffle (16), the pole (401) on the battery cell (4) fixed by the battery cell clamping device (3) is positioned at the welding position corresponding to the ultrasonic welding device (2);
the ultrasonic welding device (2) is provided with a fixed welding head (202) and a movable welding head (201) positioned above the fixed welding head (202), and the movable welding head (201) can be lifted along the vertical direction to form a welding position between the fixed welding head (202) and the movable welding head (201);
the battery cell clamping device (3) comprises a sliding plate (8) arranged on the line rail (7) in a sliding manner, a lifting plate (9) arranged on the sliding plate (8) in a lifting manner, and a battery cell clamping assembly (5) detachably connected to the lifting plate (9); the electric core clamping assembly (5) is provided with a clamping groove (502) for positioning and placing an electric core (4) and a clamping cover plate (504) hinged to one side of the clamping groove (502), one side, facing the ultrasonic welding device (2), of the clamping groove (502) is provided with an opening for enabling a pole column (401) of the electric core (4) in the clamping groove (502) to stretch into a welding position, the bottom of the opening is provided with an extension plate (501) for supporting the lower edge of the pole column (401) of the electric core (4), and a pressing plate (503) for tightly pressing the base part of the pole column (401) of the electric core (4) on the extension plate (501) is arranged on the clamping cover plate (504) corresponding to the opening; the lifting plate (9) is sleeved on a plurality of sliding columns (14) fixed on the sliding plate (8) in a sliding mode, a first spring (15) used for jacking the lifting plate (9) upwards is arranged on each sliding column (14), and a quick pressing head (11) used for pressing the lifting plate (9) downwards so that an extension plate (501) in the electric core clamping assembly (5) can be abutted to the upper edge of the fixed welding head (202) is further arranged on each sliding plate (8).
2. The integrated ultrasonic welding machine for welding the battery cell pole column of claim 1, characterized in that: two parallel linear rails (7) are arranged on the workbench (1), the two linear rails (7) are fixed on a seat plate (6) arranged on the workbench (1), and sliders which are respectively in sliding fit with the two linear rails (7) are correspondingly arranged at the bottom of the sliding plate (8).
3. The integrated ultrasonic welding machine for welding the battery cell pole column of claim 1, characterized in that: the pressing plate (503) is L-shaped, one side of the pressing plate (503) is fixed on the clamping cover plate (504) through a bolt, and the other side of the pressing plate is flush with the end part of the clamping cover plate (504) and is used for pressing the pole (401) of the battery cell (4).
4. The integrated ultrasonic welding machine for welding the battery cell pole column of claim 1, characterized in that: the clamping groove (502) is provided with a positioning mechanism for pushing the battery cell (4) in the clamping groove (502) towards the ultrasonic welding equipment, and the positioning mechanism comprises a push plate (12) arranged in the clamping groove (502) in a sliding manner and a second spring (13) fixed between the push plate (12) and the end part of the clamping groove (502) far away from the ultrasonic welding device (2).
5. The integrated ultrasonic welding machine for welding the battery cell pole column of claim 1, characterized in that: the rapid pressure head (11) is arranged on a vertical column (10) fixed on the sliding plate (8), and the pressure output end of the rapid pressure head (11) is in contact fit with the upper edge of the lifting plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502657.2A CN114799478A (en) | 2022-05-09 | 2022-05-09 | Be used for electric core utmost point post welded integral type ultrasonic welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502657.2A CN114799478A (en) | 2022-05-09 | 2022-05-09 | Be used for electric core utmost point post welded integral type ultrasonic welding machine |
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| Publication Number | Publication Date |
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| CN114799478A true CN114799478A (en) | 2022-07-29 |
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| CN202210502657.2A Pending CN114799478A (en) | 2022-05-09 | 2022-05-09 | Be used for electric core utmost point post welded integral type ultrasonic welding machine |
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| CN210306225U (en) * | 2019-05-29 | 2020-04-14 | 合肥国轩高科动力能源有限公司 | Ultrasonic welding clamp for multiple tabs of square lithium battery |
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| CN216177422U (en) * | 2021-10-25 | 2022-04-05 | 武汉市圣祥电子科技有限公司 | Round head aviation plug welding tool capable of returning quickly |
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