CN114535804B - Intelligent welding equipment and method for lithium battery parallel welding - Google Patents
Intelligent welding equipment and method for lithium battery parallel welding Download PDFInfo
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- CN114535804B CN114535804B CN202210441245.2A CN202210441245A CN114535804B CN 114535804 B CN114535804 B CN 114535804B CN 202210441245 A CN202210441245 A CN 202210441245A CN 114535804 B CN114535804 B CN 114535804B
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—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
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention belongs to the technical field of lithium battery production and processing, and particularly relates to intelligent welding equipment and method for parallel welding of lithium batteries, wherein the intelligent welding equipment comprises a welding light source; a positioning table; a material storage unit; a feeding mechanism; a material pressing mechanism; the parallel pole pieces are composed of vertical metal strips and transverse metal strips which are vertically crossed; a longitudinal arched part is arranged on the longitudinal metal belt between two longitudinally adjacent welding parts, and a transverse arched part is arranged on the transverse metal belt between two transversely adjacent welding parts; the pressing mechanism comprises a plane pressing plate, and through holes which correspond to the battery cores of the lithium battery module one to one are formed in the plane pressing plate. The invention can ensure that each cell has certain movement allowance after welding is finished, and the cell is prevented from being detached from welding, in addition, the parallel pole piece of the structure does not need to apply pressure to a welding area in the welding process, and the parallel pole piece can be ensured to be reliably attached to the cell only by applying pressure to the arch part, thereby vacating space for welding operation and avoiding shielding a dare-joint light source.
Description
Technical Field
The invention belongs to the technical field of lithium battery production and processing, and particularly relates to intelligent welding equipment and method for parallel welding of lithium batteries.
Background
The power battery is generally formed by welding a plurality of battery cells in parallel into a module, and then welding a plurality of modules in series into a power battery module. Nowadays, laser welding equipment is generally adopted to weld the power battery. When welding in parallel, generally adopt otter board form pole piece to connect as an organic whole with the electrode of each electric core in the module. However, the parallel pole pieces in the prior art are generally flat-plate-shaped structures, after welding and forming, no moving allowance exists between the battery cells, and the battery cell support can generate gaps after being used for a long time, so that the battery cells can fall off from the parallel pole pieces due to vibration. In addition, in the welding process of the flat parallel pole pieces, in order to ensure that the pole pieces are tightly attached to the end parts of the battery core, certain pressure must be applied to the pole pieces near a welding area, but the effective surface area of the parallel pole pieces is small, and the exposed space of the welding area is very narrow due to the arrangement of the pressing mechanism, so that laser beams are easily shielded. Moreover, the thickness of the parallel pole pieces is relatively thin, and the parallel pole pieces are easy to deform when the traditional manipulator takes and places the parallel pole pieces.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide an intelligent welding apparatus and method for parallel welding of lithium batteries, which can effectively prevent the core from being detached, and can obtain a large exposed area during the welding process to avoid the laser beam being blocked by the pressing mechanism.
To achieve the above and other related objects, the present invention provides an intelligent welding device for parallel welding of lithium batteries, comprising:
a welding light source;
the positioning table is positioned below the welding light source and used for positioning the lithium battery module;
the storage unit is positioned beside the positioning table and used for placing the parallel pole pieces;
the feeding mechanism is used for transferring the parallel pole pieces in the storage rack to the electrodes of the lithium battery module;
the material pressing mechanism is positioned between the welding light source and the positioning table and is arranged in a reciprocating manner along the vertical direction;
the parallel pole pieces are composed of vertical metal strips and transverse metal strips which are vertically crossed, and the crossed areas of the vertical metal strips and the transverse metal strips form welding parts; a longitudinal arched part is arranged on the longitudinal metal belt between two longitudinally adjacent welding parts, and a transverse arched part is arranged on the transverse metal belt between two transversely adjacent welding parts;
the pressing mechanism comprises a plane pressing plate, and through holes which correspond to the battery cores of the lithium battery module one by one are formed in the plane pressing plate;
during welding, each welding part of the parallel pole pieces corresponds to and is attached to the top surface of each battery cell of the lithium battery module one by one, and the plane pressing plate presses the longitudinal arch part and the transverse arch part.
In an optional embodiment of the invention, the magazine unit comprises a tray, and the tray is provided with at least one rib matched with the longitudinal arch part or the transverse arch part.
In an alternative embodiment of the invention, the feeding mechanism comprises a feeding manipulator mounted on a lifting carriage mounted on a drive unit, the drive unit being mounted with two degrees of freedom of horizontal and vertical movement.
In an optional embodiment of the present invention, the feeding manipulator includes a positioning column, and the positioning column is matched with a grid formed by interweaving the longitudinal metal belt and the transverse metal belt; the lower end of the positioning column is provided with a telescopic unit, the telescopic unit is movably connected with the positioning column at least along the length direction of the transverse metal belt or the longitudinal metal belt, so that the telescopic unit can be extended to the outer side of the positioning column in a protruding mode or contracted inside the positioning part, and when the telescopic unit is extended to the outer side of the positioning column in a protruding mode, the telescopic unit can be inserted into the lower portion of the longitudinal arch portion or the transverse arch portion.
In an optional embodiment of the invention, a linkage mechanism is arranged between the telescopic unit and the positioning column, and the linkage mechanism is configured to enable the telescopic unit to protrude to the outer side of the positioning column when the lower end of the positioning column abuts against the tray, and to enable the telescopic unit to retract into the positioning column when the lower end of the positioning column abuts against the upper end of the lithium battery module.
In an optional embodiment of the present invention, the positioning column includes a base portion, a first movable portion and a second movable portion, which are separately arranged from top to bottom, the base portion is fixedly connected to the lifting bracket, the first movable portion is movably connected to the base portion along a vertical direction, and the second movable portion is movably connected to the first movable portion along a vertical direction; a first pressure spring is arranged between the base part and the first movable part, a second pressure spring is arranged between the first movable part and the second movable part, and the hardness of the first pressure spring is greater than that of the second pressure spring.
In an optional embodiment of the present invention, the telescopic unit is movably connected to the second movable portion along a horizontal direction, the linkage mechanism includes a driving block, the driving block is movably connected to the telescopic unit along a vertical direction, and the driving block is movably connected to the first movable portion along the horizontal direction; the two sides of the convex edge are slope surfaces, the lower end of the second movable part is provided with an arch groove matched with the convex edge, and the lower end of the driving block is provided with a first wedge-shaped part matched with the slope surfaces.
In an optional embodiment of the present invention, the linkage mechanism further includes a wedge block disposed at a lower end of the base, and a second wedge portion disposed at an upper end of the telescopic unit or the driving block and engaged with the wedge block.
In an optional embodiment of the present invention, the positioning table includes a horizontal table surface, a first positioning block and a second positioning block are disposed on the horizontal table surface, and the first positioning block and the second positioning block are respectively abutted to two adjacent sidewalls of the lithium battery module.
In order to achieve the purpose and other related purposes, the invention also provides a method for welding the lithium battery module by adopting the intelligent welding equipment for the parallel welding of the lithium batteries.
The invention has the technical effects that: the parallel pole piece adopts a special structural design, can ensure that each electric core has certain movement allowance after welding is finished, and prevents the electric core from being detached from welding. The feeding manipulator disclosed by the invention can support the parallel pole pieces from the lower part of the parallel pole pieces, and can effectively prevent the parallel pole pieces from deforming in the transfer process.
Drawings
Fig. 1 is a perspective view of an intelligent welding device for parallel welding of lithium batteries according to an embodiment of the present invention;
fig. 2 is a side view of an intelligent welding device for parallel welding of lithium batteries according to an embodiment of the present invention;
fig. 3 is an exploded view of a lithium battery module, a positioning table and a pressing mechanism according to an embodiment of the present invention;
fig. 4 is a schematic view of an assembly structure of a loading manipulator according to an embodiment of the present invention;
figure 5 is a cross-sectional view of one of the stations of the loading robot provided by an embodiment of the present invention;
figure 6 is a cross-sectional view of another station of the loading robot provided by an embodiment of the present invention;
figure 7 is an exploded view of a loading robot provided by an embodiment of the present invention;
figure 8 is a perspective view of one of the loading robots shown in a neutral position in accordance with an embodiment of the present invention;
fig. 9 is a perspective view of another station of the loading robot provided by the embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
Referring to fig. 1-9, an intelligent welding device for parallel welding of lithium batteries includes a welding light source 10, a positioning table 20, a storage unit 30, a feeding mechanism 40, and a pressing mechanism 50.
Referring to fig. 1 to 3, the positioning table 20 is located below the welding light source 10 and is used for positioning the lithium battery module 100, specifically, the positioning table 20 includes a horizontal table surface, a first positioning block 21 and a second positioning block 22 are arranged on the horizontal table surface, and the first positioning block 21 and the second positioning block 22 are respectively abutted to two adjacent side walls of the lithium battery module 100.
Referring to fig. 1 and 2, the storage unit 30 is located beside the positioning table 20 and is used for placing the parallel pole pieces 200.
Referring to fig. 3, the parallel pole piece 200 is composed of a vertical metal strip 201 and a horizontal metal strip 202 which are vertically crossed, and the crossed area of the vertical metal strip 201 and the horizontal metal strip 202 forms a welding part 203; the longitudinal metal strip 201 between two longitudinally adjacent welds 203 is provided with a longitudinal arch 204, and the transverse metal strip 202 between two transversely adjacent welds 203 is provided with a transverse arch 205.
Referring to fig. 4, the magazine unit 30 includes a tray, and the tray is provided with at least one rib 31 matching with the longitudinal arch portion 204 or the transverse arch portion 205.
Referring to fig. 1 and 2, the feeding mechanism 40 is used for transferring the parallel-connected pole pieces 200 in the storage rack to the electrodes of the lithium battery module 100.
Referring to fig. 4 to 6, the loading mechanism 40 includes a loading robot 41, the loading robot 41 is mounted on a lifting bracket 42, the lifting bracket 42 is mounted on a driving unit, and the driving unit is configured to have two degrees of freedom in horizontal movement and vertical movement.
Referring to fig. 4-6, the feeding manipulator 41 includes positioning pillars, and the positioning pillars are matched with the grid formed by the interweaving of the longitudinal metal belt 201 and the transverse metal belt 202; the lower end of the positioning column is provided with a telescopic unit 414, the telescopic unit 414 is movably connected with the positioning column at least along the length direction of the transverse metal belt 202 or the longitudinal metal belt 201, so that the telescopic unit 414 can be protruded to the outer side of the positioning column or contracted inside the positioning part, and when the telescopic unit 414 is protruded to the outer side of the positioning column, the telescopic unit can be inserted below the longitudinal arch part 204 or the transverse arch part 205.
Referring to fig. 4-6, a linkage mechanism is disposed between the telescopic unit 414 and the positioning post, and the linkage mechanism is configured to enable the telescopic unit 414 to protrude to the outside of the positioning post when the lower end of the positioning post abuts against the tray, and to enable the telescopic unit 414 to retract into the positioning post when the lower end of the positioning post abuts against the upper end of the lithium battery module 100.
Referring to fig. 5-9, the positioning column includes a base 411, a first movable portion 412 and a second movable portion 413 which are separately arranged from top to bottom, the base 411 is fixedly connected to the lifting support 42, the first movable portion 412 is movably connected to the base 411 along the vertical direction, and the second movable portion 413 is movably connected to the first movable portion 412 along the vertical direction; a first compression spring 416 is arranged between the base 411 and the first movable part 412, a second compression spring 417 is arranged between the first movable part 412 and the second movable part 413, and the hardness of the first compression spring 416 is greater than that of the second compression spring 417.
Referring to fig. 5-9, the telescopic unit 414 is movably connected to the second movable portion 413 along a horizontal direction, the linkage mechanism includes a driving block 415, the driving block 415 is movably connected to the telescopic unit 414 along a vertical direction, and the driving block 415 is movably connected to the first movable portion 412 along a horizontal direction; the two sides of the protruding rib 31 are slope surfaces, the lower end of the second movable part 413 is provided with an arch groove 4131 matched with the protruding rib 31, and the lower end of the driving block 415 is provided with a first wedge-shaped part 4151 matched with the slope surfaces.
Referring to fig. 5 to 9, the linkage mechanism further includes a wedge block 4111 disposed at a lower end of the base 411, and a second wedge portion 4141 disposed at an upper end of the telescopic unit 414 or the driving block 415 and engaged with the wedge block 4111.
Referring to fig. 1 to 3, the pressing mechanism 50 is located between the welding light source 10 and the positioning table 20 and is disposed to reciprocate along a vertical direction, specifically, the pressing mechanism 50 includes a planar pressing plate 51, and through holes 52 corresponding to the battery cores 101 of the lithium battery module 100 are disposed on the planar pressing plate 51.
Referring to fig. 2, during welding, the welding portions 203 of the parallel pole pieces 200 correspond to and are attached to the top surfaces of the battery cells 101 of the lithium battery module 100, and the planar pressing plate 51 presses the longitudinal arched portion 204 and the transverse arched portion 205.
Based on the intelligent welding equipment for the parallel welding of the lithium batteries, the invention also provides a method for welding the lithium battery module 100 by adopting the intelligent welding equipment for the parallel welding of the lithium batteries, and the specific working process and principle are as follows:
firstly, placing the parallel pole piece 200 on a tray, and clamping the rib 31 with the transverse arch part 205 to realize the primary positioning of the parallel pole piece 200; then, the feeding manipulator 41 is transferred to the upper portion of the tray, and then the feeding manipulator 41 is driven to descend, during the descending process, the second movable portion 413 is abutted against the tray, the second compression spring 417 is compressed first, at this time, the first movable portion 412 descends relative to the second movable portion 413, when the lower end of the driving block 415 is abutted against the side wall of the rib 31, the driving block 415 can be separated towards two sides, and then the telescopic portion is driven to be inserted below the longitudinal arch portion 204, then the feeding manipulator 41 starts to ascend, and the parallel pole piece 200 is transferred to the top surface of the lithium battery module 100 along the horizontal direction, the top surface of the lithium battery module 100 is provided with the cell 101 supporting frame, the feeding manipulator 41 starts to descend above the lithium battery module 100, the second movable portion 413 is abutted against the cell 101 supporting frame, at this time, the second compression spring 417 is compressed first, but because the rib 31 is not arranged on the cell 101 supporting frame, no any force is generated on the driving block 415 in the process, as the feeding manipulator 41 continues to move downwards, the first pressure spring 416 also starts to be compressed, and the wedge block 4111 on the base 411 gradually collides with the second wedge part 4141, so that the telescopic part is driven to be drawn out from the longitudinal arch part 204, and the parallel pole piece 200 is separated from the feeding manipulator 41 and falls on the top surface of the lithium battery module 100; and then the feeding manipulator 41 is moved away from the upper part of the lithium battery module 100, the planar pressing plate 51 descends, the parallel pole pieces 200 are pressed tightly, and at the moment, the welding light source 10 can weld the welding parts 203 on the parallel pole pieces 200 through the through holes 52 on the planar pressing plate 51.
In summary, the parallel pole piece 200 of the present invention adopts a special structural design, which can make each cell 101 have a certain movement margin after welding, and prevent the cell 101 from being detached from welding, and in addition, the parallel pole piece 200 of the structure does not need to apply pressure to the welding area during welding, and only needs to apply pressure to the arch part to ensure the reliable attachment of the parallel pole piece 200 and the cell 101, thereby vacating a space for welding operation and avoiding shielding of a light source. The feeding manipulator 41 can support the parallel pole piece 200 from the lower part of the parallel pole piece 200, and can effectively prevent the parallel pole piece 200 from deforming in the transferring process.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (2)
1. The utility model provides a lithium cell is intelligent welding equipment for parallel connection welding which characterized in that includes:
a welding light source;
the positioning table is positioned below the welding light source and used for positioning the lithium battery module;
the storage unit is positioned beside the positioning table and used for placing the parallel pole pieces;
the feeding mechanism is used for transferring the parallel pole pieces in the storage rack to the electrodes of the lithium battery module;
the material pressing mechanism is positioned between the welding light source and the positioning table and is arranged in a reciprocating mode along the vertical direction;
the parallel pole pieces are composed of vertical metal strips and transverse metal strips which are vertically crossed, and the crossed areas of the vertical metal strips and the transverse metal strips form welding parts; a longitudinal arched part is arranged on the longitudinal metal belt between two longitudinally adjacent welding parts, and a transverse arched part is arranged on the transverse metal belt between two transversely adjacent welding parts;
the pressing mechanism comprises a plane pressing plate, and through holes which correspond to the battery cores of the lithium battery module one by one are formed in the plane pressing plate;
during welding, the welding parts of the parallel pole pieces correspond to the top surfaces of the battery cores of the lithium battery module one by one and are attached to the top surfaces, and the plane pressing plate presses the longitudinal arched part and the transverse arched part;
the material storage unit comprises a tray, and at least one convex edge matched with the longitudinal arch part or the transverse arch part is arranged on the tray;
the feeding mechanism comprises a feeding mechanical arm, the feeding mechanical arm is arranged on a lifting support, the lifting support is arranged on a driving unit, and the driving unit is assembled to have two degrees of freedom of horizontal movement and vertical movement;
the feeding manipulator comprises a positioning column, and the positioning column is matched with a grid formed by interweaving the longitudinal metal belt and the transverse metal belt; the lower end of the positioning column is provided with a telescopic unit, the telescopic unit is movably connected with the positioning column at least along the length direction of the transverse metal belt or the longitudinal metal belt, so that the telescopic unit can be protruded to the outer side of the positioning column or contracted in the positioning part, and when the telescopic unit is protruded to the outer side of the positioning column, the telescopic unit can be inserted below the longitudinal arched part or the transverse arched part;
a linkage mechanism is arranged between the telescopic unit and the positioning column, and is assembled to enable the telescopic unit to protrude to the outer side of the positioning column when the lower end of the positioning column abuts against the tray, and enable the telescopic unit to retract into the positioning column when the lower end of the positioning column abuts against the upper end of the lithium battery module;
the positioning column comprises a base part, a first movable part and a second movable part which are arranged in a split manner from top to bottom, the base part is fixedly connected with the lifting support, the first movable part is movably connected with the base part along the vertical direction, and the second movable part is movably connected with the first movable part along the vertical direction; a first pressure spring is arranged between the base part and the first movable part, a second pressure spring is arranged between the first movable part and the second movable part, and the hardness of the first pressure spring is greater than that of the second pressure spring;
the telescopic unit is movably connected with the second movable part along the horizontal direction, the linkage mechanism comprises a driving block, the driving block is movably connected with the telescopic unit along the vertical direction, and the driving block is movably connected with the first movable part along the horizontal direction; the two sides of the convex edge are slope surfaces, the lower end of the second movable part is provided with an arch groove matched with the convex edge, and the lower end of the driving block is provided with a first wedge-shaped part matched with the slope surfaces;
the linkage mechanism further comprises a wedge block arranged at the lower end of the base part and a second wedge part which is arranged at the upper end of the telescopic unit or the driving block and matched with the wedge block.
2. The intelligent welding equipment for the parallel welding of the lithium batteries as in claim 1, wherein the positioning table comprises a horizontal table surface, a first positioning block and a second positioning block are arranged on the horizontal table surface, and the first positioning block and the second positioning block are respectively abutted against two adjacent side walls of the lithium battery module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210441245.2A CN114535804B (en) | 2022-04-26 | 2022-04-26 | Intelligent welding equipment and method for lithium battery parallel welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210441245.2A CN114535804B (en) | 2022-04-26 | 2022-04-26 | Intelligent welding equipment and method for lithium battery parallel welding |
Publications (2)
| Publication Number | Publication Date |
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| CN114535804A CN114535804A (en) | 2022-05-27 |
| CN114535804B true CN114535804B (en) | 2022-08-12 |
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| CN202210441245.2A Active CN114535804B (en) | 2022-04-26 | 2022-04-26 | Intelligent welding equipment and method for lithium battery parallel welding |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081588B (en) * | 2015-06-26 | 2017-01-25 | 浙江时空能源技术有限公司 | Multi-point laser welding clamping device for battery pack busbar |
| CN206353580U (en) * | 2016-12-24 | 2017-07-25 | 惠州市蓝微新源技术有限公司 | A kind of cylindrical battery core parallel-connection structure |
| CN108436265A (en) * | 2018-04-02 | 2018-08-24 | 深圳市联赢激光股份有限公司 | A kind of battery modules welder |
| CN110625249A (en) * | 2019-09-27 | 2019-12-31 | 浦北高迈新能源科技有限公司 | Laser welding device for lithium ion battery module of heavy truck |
| CN214706169U (en) * | 2021-03-15 | 2021-11-12 | 安克创新科技股份有限公司 | Battery module and power supply device |
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