Soft package battery module assembly welding line body

Abstract

The invention relates to the field of soft package battery module production, and discloses a soft package battery module assembling and welding line body which comprises a tool jig, a conveying mechanism, a busbar mounting station, a tab bending and rolling mechanism and a tab welding mechanism, and the busbar mounting station, the tab bending and rolling mechanism and the tab welding mechanism are sequentially arranged in the conveying direction of the conveying mechanism. The conveying mechanism is used for conveying tool jigs, the busbar mounting station is used for mounting busbars on the battery modules, the tab bending and rolling mechanism is used for bending tabs on the battery modules and rolling the bent tabs, and the tab welding mechanism is used for welding the rolled tabs and the busbars. According to the soft package battery module assembling and welding device, assembling and welding automation of the soft package battery module is achieved, the machining stations are connected together in series through the conveying mechanism, workpieces are conveyed at a high speed, and therefore the production takt is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of production and processing of soft-pack battery modules, and in particular relates to a soft-pack battery module assembly welding line. Background Art

[0002] In recent years, new energy vehicles have developed rapidly. Soft-pack batteries have been favored by new energy vehicle manufacturers year by year due to their high energy density, small size and good safety performance. The problem that is prone to occur in the assembly process of soft-pack battery modules is the connection between the tabs and the busbars. There are certain requirements for the space for assembly and welding. The overall process is relatively complicated, resulting in a low degree of automation. Summary of the invention

[0003] The purpose of the present invention is to provide a soft-pack battery module assembly welding line body capable of realizing the automation of soft-pack battery module assembly welding in view of the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A soft pack battery module assembly welding line body, comprising a tooling fixture, a conveying mechanism, and a busbar installation station, a tab bending and rolling mechanism, and a tab welding mechanism sequentially arranged along the conveying direction of the conveying mechanism;

[0006] The tooling fixture is used to carry the battery module;

[0007] The conveying mechanism is used to transport the tooling fixture;

[0008] The busbar installation station is used to install the busbar on the battery module;

[0009] The tab bending and rolling mechanism is used to bend the tabs on the battery module and roll the bent tabs flat;

[0010] The pole lug welding mechanism is used to weld the flattened pole lug to the busbar.

[0011] The tooling fixture comprises a fixed base plate and a battery module clamping assembly. The battery module clamping assembly is arranged on the upper surface of the fixed base plate and is used to clamp the battery module and center the battery module.

[0012] The tooling fixture also includes a rotating assembly arranged on the lower surface of the fixed base plate, the rotating assembly includes a rotating gear, a rack, and a driving assembly, the rotating gear is arranged on the lower surface of the fixed base plate, the rotating gear is meshed with the rack, and the driving assembly is connected to the rack for driving the rack to move so as to drive the rotating gear to rotate.

[0013] The driving assembly includes a linear module and a first driving member. The mover of the linear module is connected to the first driving member. The movable end of the first driving member is connected to a plug-in block. A slot is provided on the rack. The first driving member is used to plug the plug-in block into the slot when the movable end of the first driving member is extended. The linear module is used to drive the rack to move.

[0014] A clamping block is also provided on the lower surface of the fixed base plate, and the module fixture also includes a lower mounting plate and a rotation locking assembly. The lower mounting plate is arranged below the rotating gear, and the rotation locking assembly includes a second driving member, a moving block, and an elastic member. One end of the moving block is connected to the lower mounting plate through the elastic member, and the other end of the moving block can be clamped with the clamping block. The movable end of the second driving member is connected to the moving block for driving the moving block to withdraw from the clamping block.

[0015] The battery module clamping assembly includes a rotating motor, a threaded rod, and two symmetrically arranged clamping blocks. The two clamping blocks are slidably arranged on the fixed base plate. The bottoms of the two clamping blocks are connected to threaded sleeves. The threads of the two threaded sleeves have opposite rotation directions. The outer wall of the threaded rod is matched with the inner walls of the two threaded sleeves through threads. The output shaft of the rotating motor is connected to one end of the threaded rod for driving the threaded rod to rotate forward to drive the two clamping blocks to move toward each other, and to drive the threaded rod to rotate reversely to drive the two clamping blocks to move away from each other.

[0016] The tab bending and rolling mechanism includes a No. 1 three-axis motion mechanism and two groups of bending and rolling mechanisms. The tab bending and rolling mechanism includes a No. 1 three-axis motion mechanism and two groups of bending and rolling mechanisms. The two groups of bending and rolling mechanisms are symmetrically arranged on the No. 1 three-axis motion mechanism. The bending and rolling mechanism includes a bending mechanism and a rolling mechanism.

[0017] The tab welding mechanism includes a clamping mechanism and a welding mechanism. The clamping mechanism includes a No. 2 three-axis motion mechanism and two pressure head assemblies. The two pressure head assemblies are symmetrically arranged on the No. 2 three-axis motion mechanism for clamping the tabs of the battery module. The welding mechanism includes a welding motion mechanism and a galvanometer assembly. The galvanometer assembly is arranged on the welding motion mechanism for welding the tabs of the battery module.

[0018] The post-weld detection mechanism includes a No. 3 three-axis motion mechanism and two micro-resistance testing and weld detection mechanisms. The two micro-resistance testing and weld detection mechanisms are symmetrically arranged on the No. 3 three-axis motion mechanism. The micro-resistance testing and weld detection mechanism includes a micro-resistance testing mechanism and a weld detection mechanism. The micro-resistance testing mechanism is used to perform micro-resistance detection on the battery module, and the weld detection mechanism is used to perform weld quality detection on the battery module.

[0019] It also includes an upper line docking platform and a return flow docking platform; the conveying mechanism includes an upper working line and a lower return line; the upper line docking platform is arranged at the line ends of the upper working line and the lower return line, and is used to lift the tooling fixture from the lower return line to the upper working line, and the return flow docking platform is arranged at the line ends of the upper working line and the lower return line, and is used to lower the tooling fixture from the upper working line to the lower return line.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention discloses a soft-pack battery module assembly welding line, comprising a jig, a conveying mechanism, and a busbar installation station, a tab bending and rolling mechanism, and a tab welding mechanism sequentially arranged along the conveying direction of the conveying mechanism. The jig is used to carry the battery module, and the conveying mechanism is used to convey the jig to each processing station to realize the assembly and welding of the soft-pack battery module. The busbar is installed on the battery module through the busbar installation station, the tabs on the battery module are bent and the bent tabs are rolled flat through the tab bending and rolling mechanism, and the flattened tabs are welded to the busbar through the tab welding mechanism. The above design realizes the automation of the assembly and welding of the soft-pack battery module, and because the processing stations are connected in series through the conveying mechanism, the efficient flow of the battery module can be realized, thereby improving the production rhythm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the tooling fixture in the present invention.

[0024] Figure 3 It is the front view of the tooling fixture in the present invention.

[0025] Figure 4 It is a side view of the tooling fixture in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the rotating assembly in the present invention.

[0027] Figure 6 It is a structural schematic diagram of the power mechanism in the present invention.

[0028] Figure 7 It is a structural schematic diagram of the code engraving and scanning mechanism in the present invention.

[0029] Figure 8 It is a schematic structural diagram of the tab bending and rolling mechanism in the present invention.

[0030] Fig. 9 for Figure 8 Schematic diagram of the structure of the bending mechanism and the rolling mechanism.

[0031] Fig.10 It is a structural schematic diagram of the tab welding mechanism in the present invention.

[0032] Fig.11 It is a structural schematic diagram of the post-weld detection mechanism in the present invention.

[0033] Fig.12 It is a structural schematic diagram of the conveying mechanism in the present invention.

[0034] In the above figure, 1, conveying mechanism; 11, upper working line; 12, lower return line;

[0035] 2. Fixture; 21. Fixed base plate; 211. Snap-on block; 22. Battery module clamping assembly; 221. Rotating motor; 222. Threaded rod; 223. Clamping block; 224. Threaded sleeve; 225. Snap-on joint; 226. Slot; 227. Power mechanism; 23. Rotating assembly; 231. Rotating gear; 232. Rack; 233. Linear module; 234. First driving member; 235. Plug-in block; 236. Slot; 24. Lower mounting plate; 25. Rotating locking assembly; 251. Second driving member; 252. Moving block; 253. Elastic member;

[0036] 3. Code engraving and scanning mechanism; 31. Code engraving and scanning motion mechanism; 32. Laser code engraving machine; 33. Code scanning gun; 34. Coaxial dust removal mechanism;

[0037] 4. Tab bending and rolling mechanism; 41. No. 1 three-axis motion mechanism; 411. Double-actuator X-axis linear module; 412. Y-axis linear module; 413. Z-axis linear module; 42. Bending mechanism; 43. Rolling mechanism;

[0038] 5. Tab welding mechanism; 51. Clamping mechanism; 511. Press head assembly; 52. Welding mechanism; 521. Welding motion mechanism; 522. Galvanometer assembly;

[0039] 6. Post-weld inspection mechanism; 61. Micro-resistance test and weld inspection mechanism; 611. Micro-resistance test mechanism; 612. Weld inspection mechanism;

[0040] 7. Launch the docking platform;

[0041] 8. Reflux connection platform. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with specific implementation methods and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] See also Figure 1 The present invention proposes a soft-pack battery module assembly welding line, comprising a jig 2, a conveying mechanism 1, and a busbar installation station, a tab bending and flattening mechanism 4, and a tab welding mechanism 5 which are sequentially arranged along the conveying direction of the conveying mechanism 1. The jig 2 is used to carry the battery module, and the conveying mechanism 1 is used to transport the jig 2 to each processing station to realize the assembly welding of the soft-pack battery module; the busbar installation station is used to install the busbar on the battery module, the tab bending and flattening mechanism 4 is used to bend the tabs on the battery module and flatten the bent tabs, and the tab welding mechanism 5 is used to weld the flattened tabs to the busbar.

[0046] The assembly welding automation of the soft-pack battery module is realized through the above-mentioned soft-pack battery module assembly welding line, and because the various processing stations in the above-mentioned soft-pack battery module assembly welding line are connected in series through the conveying mechanism, the efficient flow of the battery module can be realized, thereby improving the production cycle. Specifically, the conveying mechanism 1 is a magnetic levitation line, which has high conveying speed and high precision, reduces the product conveying time, improves the precision of the overall mechanism, and thus improves the product production quality and production efficiency.

[0047] See also Figure 2 In one embodiment of the present invention, the tooling fixture 2 includes a fixed base plate 21 and a battery module clamping assembly 22. The battery module clamping assembly 22 is arranged on the upper surface of the fixed base plate 21 and is used to clamp the battery module and center the battery module; centering is beneficial to improving the accuracy of subsequent processing technology.

[0048] Since some processes in assembly welding require processing on both sides of the battery module, for example, bus bars need to be installed on both sides of the battery module, the traditional soft-pack module assembly line usually adopts a symmetrical arrangement of two sets of bus bar installation stations to ensure that the bus bar installation requirements on the front and back sides of the battery module are completed. However, this method will significantly increase production costs.

[0049] To solve the above problems, see Figure 2 In one embodiment of the present invention, the tooling fixture 2 also includes a rotating assembly 23 arranged on the lower surface of the fixed base plate 21, the rotating assembly 23 includes a rotating gear 231, a rack 232, and a driving assembly. The rotating gear 231 is fixedly connected to the lower surface of the fixed base plate 21, the rotating gear 231 is meshed with the rack 232, and the driving assembly is connected to the rack 232, which is used to drive the rack 232 to move to drive the rotating gear 231 to rotate, thereby driving the fixed base plate 21 to rotate on a horizontal plane.

[0050] The tooling fixture 2 is of rotatable design. Specifically, the rotation angle is set to 180 degrees to completely reverse the front and back of the battery module. When installing the bus, first install the bus on the front of the battery module through the bus installation station, and then rotate the battery module to the back through the rotatable tooling fixture 2, so that the bus on the back of the battery module can be installed using the same set of bus installation stations; since there is no need to set up two sets of bus installation stations, the processing requirements of the front and back of the battery module can be met, which greatly reduces the production cost. Specifically, the bus installation station can be used to manually install the bus or use a robot to install the bus, which is not limited in this embodiment.

[0051] See also Figures 3 to 5 In one embodiment of the present invention, the driving assembly includes a linear module 233 and a first driving member 234. The mover of the linear module 233 is connected to the first driving member 234. The movable end of the first driving member 234 is connected to a plug-in block 235. A slot 236 is provided on the rack 232. The first driving member 234 is used to plug the plug-in block 235 into the slot 236 when the movable end of the first driving member 234 is extended. The linear module 233 is used to drive the rack 232 to move along the first direction to drive the rotating gear 231 to rotate, thereby driving the fixed base plate 21 to rotate on the horizontal plane. Specifically, the first driving member 234 is preferably a telescopic cylinder, which is not limited in this embodiment.

[0052] See also Figure 4 , Figure 5 In one embodiment of the present invention, a clamping block 211 is further provided on the lower surface of the fixed base plate 21, and the module fixture 2 also includes a lower mounting plate 24 and a rotation locking assembly 25. The lower mounting plate 24 is arranged below the rotating gear 231. The rotation locking assembly 25 includes a second driving member 251, a moving block 252, and an elastic member 253. One end of the moving block 252 is connected to the lower mounting plate 24 through the elastic member 253, and the other end of the moving block 252 can be clamped with the clamping block 211. The movable end of the second driving member 251 is connected to the moving block 252, and is used to drive the moving block 252 to move along the second direction so that the moving block 252 exits the clamping block 211.

[0053] The movable block 252 is engaged with the engaging block 211 to lock the fixed base plate 21, thereby preventing the fixed base plate 21 and the battery module placed on the fixed base plate 21 from rotating due to accidental touching. When the battery module needs to be flipped, the movable block 252 is driven by the second driving member 251 to withdraw from the engaging block 211 to achieve unlocking. At this time, the fixed base plate 21 can rotate freely.

[0054] Specifically, the movable block 252 is a T-shaped structure, a first end of which is connected to the lower mounting plate 24 through an elastic member 253, a second end of which can be clamped with the clamping block 211, and a pulley is provided at the third end. The movable end of the second driving member 251 is connected to a push block, and a chamfer is provided on the side of the push block close to the pulley. When the movable end of the second driving member 251 is extended, the pulley contacts the chamfered inclined surface, and the pulley rolls along the chamfered inclined surface. Under the pressure of the chamfered inclined surface, the elastic member 253 is squeezed and the movable block 252 withdraws from the clamping block 211.

[0055] Specifically, a plurality of ball bearings are arranged between the lower mounting plate 24 and the fixed base plate 21, which provide support for the rotation of the fixed base plate 21 while reducing the friction between the lower mounting plate 24 and the fixed base plate 21 and improving the smoothness of rotation; the number of ball bearings may be four, which are respectively arranged at the four corners of the lower mounting plate 24.

[0056] See also Figure 2In one embodiment of the present invention, the battery module clamping assembly 22 includes a rotating motor 221, a threaded rod 222, and two symmetrically arranged clamping blocks 223. The two clamping blocks 223 are both slidably arranged on the fixed base plate 21. Specifically, a slide rail is provided on the fixed base plate 21, and a slider matching the slide rail is provided at the bottom of the clamping blocks 223; the bottoms of the two clamping blocks 223 are both connected with threaded sleeves 224, and the threads of the two threaded sleeves 224 are rotated in opposite directions. The outer wall of the threaded rod 222 matches the inner wall of the two threaded sleeves 224 through threads. The output shaft of the rotating motor 221 is coaxially arranged with the threaded rod 222, and the output shaft of the rotating motor 221 is connected to one end of the threaded rod 222. The rotating motor 221 is used to drive the threaded rod 222 to rotate forward to drive the two clamping blocks 223 to move toward each other to clamp the battery module in the middle, or drive the threaded rod 222 to rotate reversely to drive the two clamping blocks 223 to move backwards to release the battery module in the middle.

[0057] By using a rotating motor 221 as the only power source and cooperating with the threaded rod 222 and the threaded sleeve 224, the movements of the two clamping blocks 223 can be kept synchronized at all times, thereby ensuring the centering accuracy of the battery module. In addition, a floating block is provided on the clamping block 223, and the floating block is connected to the clamping block 223 via a spring. By providing a floating block and a spring, deformation or damage of the battery module caused by excessive clamping can be prevented.

[0058] See also Figure 4 , Figure 6 The output shaft of the rotating motor 221 is provided with a clamping joint 225, and one end of the threaded rod 222 is provided with a clamping groove 226. The battery module clamping assembly 22 also includes a power mechanism 227, and the output end of the power mechanism 227 is coaxially arranged with the rotating shaft of the rotating motor 221, and the output end of the power mechanism 227 is connected to the rotating shaft of the rotating motor 221.

[0059] When the output end of the power mechanism 227 extends out, the driving rotating motor 221 moves toward one end of the threaded rod 222 until the clamping joint 225 is clamped with the clamping slot 226. At this time, the rotating motor 221 and the threaded rod 222 are in a connected state and can transmit power normally. When the output end of the power mechanism 227 retracts, the driving rotating motor 221 moves in a direction away from the threaded rod 222 until the clamping joint 225 exits the clamping slot 226.

[0060] The rotating motor 221 and the threaded rod 222 are detachably connected. After clamping and centering the battery module, the rotating motor 221 and the threaded rod 222 are turned into a separated state, so that the rotating motor 221 will not interfere with other subsequent processing mechanisms, thereby ensuring the processing reliability of the overall mechanism.

[0061] See also Figure 7In one embodiment of the present invention, the soft-pack battery module assembly welding line also includes a code engraving and scanning mechanism 3, which includes a code engraving and scanning motion mechanism 31, and the code engraving and scanning motion mechanism 31 is provided with a laser engraving machine 32, a code scanning gun 33 and a coaxial dust removal mechanism 34.

[0062] Specifically, the code engraving and scanning motion mechanism 31 is a three-dimensional motion mechanism, including an X-axis cantilever, a Y-axis cantilever arranged on the X-axis cantilever, and a Z-axis cantilever arranged on the Y-axis cantilever. The laser engraving machine 32, the scanning gun 33 and the coaxial dust removal mechanism 34 are all arranged on the Z-axis cantilever.

[0063] The working principle of the code engraving and scanning mechanism 3 is as follows: when working, the code engraving and scanning motion mechanism 31 carries the laser code engraving machine 32, the code scanning gun 33 and the coaxial dust removal mechanism 34 to the product engraving position, the laser code engraving machine 32 laser engraves the product bracket, and the coaxial dust removal mechanism 34 simultaneously processes the processing dust of the laser processing. After the laser processing is completed, the code scanning gun 33 reads and binds the module code.

[0064] See also Figure 8 , Fig. 9 In one embodiment of the present invention, there are two groups of tab bending and rolling mechanisms 4, which are symmetrically arranged on both sides of the conveying mechanism 1. Each group of tab bending and rolling mechanisms 4 includes a No. 1 three-axis motion mechanism 41 and two groups of bending and rolling mechanisms. The No. 1 three-axis motion mechanism 41 includes a double-moving X-axis linear module 411. Each of the two movers of the double-moving X-axis linear module 411 is provided with a Y-axis linear module 412, and each Y-axis linear module 412 is provided with a Z-axis linear module 413. The two groups of bending and rolling mechanisms are symmetrically arranged on the movers of the two Z-axis linear modules 413. The bending and rolling mechanisms include a bending mechanism 42, a rolling mechanism 43, a visual mechanism, a distance measuring mechanism, and a key mechanism missing detection mechanism.

[0065] The working principle of the tab bending and rolling mechanism 4 is as follows: the visual mechanism and the distance measuring mechanism jointly detect the position of the tab of the battery module, and after the detection is completed, the position information is fed back to the first three-axis motion mechanism 41, and then the first three-axis motion mechanism 41 first carries the bending mechanism 42 to bend the tab, and then carries the rolling mechanism 43 to roll the tab to make the tab flat. The key mechanism missing detection mechanism is used to detect whether the components in the tab bending and rolling mechanism 4 are missing. If missing, a warning is issued in the form of a warning light or a prompt sound.

[0066] Specifically, the bending mechanism 42 is a bending sheet, and the rolling mechanism 43 is a circular roller; through the action of the No. 1 three-axis motion mechanism 41, the bending sheet is first driven to move a certain distance along the X-axis direction, so that the bending sheet coincides with the pole ear to be bent, and then the bending sheet is driven to move a certain distance along the Y-axis direction to complete the bending work of the pole ear, which is generally set to a 90-degree bending; after bending, through the action of the No. 1 three-axis motion mechanism 41, the circular roller is first driven to move a certain distance along the X-axis direction, so that the circular roller contacts the bent pole ear, and then the circular roller 4 is driven to move a certain distance along the Y-axis direction, thereby completing the rolling work of the bent pole ear.

[0067] See also Fig.10 In one embodiment of the present invention, the tab welding mechanism 5 includes a clamping mechanism 51 and a welding mechanism 52. The clamping mechanism 51 includes a No. 2 three-axis motion mechanism and two pressure head assemblies 511. Specifically, the No. 2 three-axis motion mechanism has the same structure as the No. 1 three-axis motion mechanism 41. The two pressure head assemblies 511 are respectively arranged on the movers of the two Z-axis linear modules 413 of the No. 2 three-axis motion mechanism, and are used to clamp the tabs of the battery module and the bus. The welding mechanism 52 includes a welding motion mechanism 521 and a galvanometer assembly 522. The galvanometer assembly 522 is arranged on the welding motion mechanism 521, and is used to weld the flattened tabs to the bus.

[0068] The working principle of the tab welding mechanism 5 is as follows: the No. 2 three-axis motion mechanism carries a set of pressure head assemblies 511 to press the tabs and the bus on the front side of the battery module. After pressing, the welding motion mechanism 521 carries the galvanometer assembly 522 to weld the tabs and the bus on the front side of the battery module together; while waiting for the tabs on one side of the battery module to be welded, the No. 2 three-axis motion mechanism carries another set of pressure head assemblies 511 to press the tabs on the other side of the front of the battery module. The two sets of pressure head assemblies 511 are pressed alternately, so that the galvanometer assembly 522 maintains non-stop processing; after the tabs on both sides of the front of the battery module are welded, the above-mentioned front tab welding process is repeated to complete the welding of the back tabs of the battery module.

[0069] See also Fig.11 In one embodiment of the present invention, the post-weld detection mechanism 6 includes a No. 3 three-axis motion mechanism and two micro-resistance testing and weld detection mechanisms 61. Specifically, the No. 3 three-axis motion mechanism has the same structure as the No. 1 three-axis motion mechanism 41. The two micro-resistance testing and weld detection mechanisms 61 are symmetrically arranged on the movers of the two Z-axis linear modules 413 of the No. 3 three-axis motion mechanism. The micro-resistance testing and weld detection mechanisms 61 include a micro-resistance testing mechanism 611 and a weld detection mechanism 612. The micro-resistance testing mechanism 611 is used to perform micro-resistance detection on the battery module, and the weld detection mechanism 62 is used to perform weld quality detection on the battery module.

[0070] The working principle of the post-weld inspection mechanism 6 is: the No. 3 three-axis motion mechanism carries the micro-resistance test and weld inspection mechanism 61 to perform micro-resistance inspection and weld quality inspection on the front of the battery module. After the front inspection is completed, the above front inspection process is repeated to complete the back inspection of the battery module.

[0071] See also Fig.12 In one embodiment of the present invention, the conveying mechanism 1 includes an upper working line 11 and a lower reflow line 12, and the soft-pack battery module assembly welding line body also includes an upper line docking platform 7 and a reflow docking platform 8. The upper line docking platform 7 is arranged at the line ends of the upper working line 11 and the lower reflow line 12, and is used to lift the tooling fixture 2 from the lower reflow line 12 to the upper working line 11. The reflow docking platform 8 is arranged at the line ends of the upper working line 11 and the lower reflow line 12, and is used to lower the tooling fixture 2 from the upper working line 11 to the lower reflow line 12.

[0072] During operation, the empty jig 2 is moved from the lower return line 12 to the upper line docking platform 7, and the upper line docking platform 7 lifts the empty jig 2 to the upper working line 11; the manipulator grabs the battery module onto the jig 2, and the battery module clamping assembly 22 on the jig 2 locks and centers the battery module; the code engraving and scanning mechanism 3 engraves and scans the code at the first station; the jig 2 moves to the second station, and the busbar is installed at the second station by the busbar installation station; the jig 2 moves to the third station, and the pole ear bending and rolling mechanism 4 folds the pole ear on the battery module toward the busbar at the third station Bend and flatten the bent tabs; move the jig 2 to the fourth station, where the tab welding mechanism 5 welds the flattened tabs to the busbars; move the jig 2 to the fifth station, where the post-weld inspection mechanism 6 performs tab micro-resistance inspection and weld quality inspection; the battery module clamping assembly 22 on the jig 2 releases the battery module, and the robot takes out the battery module and sends it to the storage area for storage, and the empty jig 2 is lowered from the reflux docking platform 8 to the lower reflux line 12, and then moved from the lower reflux line 12 to the upper line docking platform 7; this forms a cycle of the jig 2.

Claims

1. A soft pack battery module assembly welding line, characterized in that: include A tooling fixture (2), a conveying mechanism (1), and a busbar installation station, a tab bending and rolling mechanism (4), and a tab welding mechanism (5) which are sequentially arranged along the conveying direction of the conveying mechanism (1); The tooling fixture (2) is used to carry the battery module; The conveying mechanism (1) is used to transport the tooling fixture (2); The busbar installation station is used to install the busbar on the battery module; The tab bending and rolling mechanism (4) is used to bend the tabs on the battery module and to roll the bent tabs flat; The pole lug welding mechanism (5) is used for welding the flattened pole lug and the busbar.

2. The soft pack battery module assembly welding line according to claim 1, characterized in that: The tooling fixture (2) comprises a fixed base plate (21) and a battery module clamping assembly (22); the battery module clamping assembly (22) is arranged on the upper surface of the fixed base plate (21) and is used to clamp the battery module and center the battery module.

3. The soft pack battery module assembly welding line according to claim 2, characterized in that: The jig (2) further comprises a rotating assembly (23) arranged on the lower surface of the fixed base plate (21), the rotating assembly (23) comprising a rotating gear (231), a rack (232), and a driving assembly, the rotating gear (231) being arranged on the lower surface of the fixed base plate (21), the rotating gear (231) being meshed with the rack (232), and the driving assembly being connected to the rack (232) and being used for driving the rack (232) to move so as to drive the rotating gear (231) to rotate.

4. The soft pack battery module assembly welding line according to claim 3, characterized in that: The driving assembly comprises a linear module (233) and a driving member (234); a mover of the linear module (233) is connected to the driving member (234); a plug-in block (235) is connected to a movable end of the driving member (234); a slot (236) is provided on the rack (232); the driving member (234) is used to plug the plug-in block (235) into the slot (236) when the movable end of the driving member (234) is extended; and the linear module (233) is used to drive the rack (232) to move.

5. The soft pack battery module assembly welding line according to claim 2, characterized in that: A clamping block (211) is also provided on the lower surface of the fixed base plate (21). The module fixture (2) further comprises a lower mounting plate (24) and a rotation locking assembly (25). The lower mounting plate (24) is arranged below the rotation assembly (23). The rotation locking assembly (25) comprises a second driving member (251), a moving block (252), and an elastic member (253). One end of the moving block (252) is connected to the lower mounting plate (24) via the elastic member (253). The other end of the moving block (252) can be clamped with the clamping block (211). The movable end of the second driving member (251) is connected to the moving block (252) and is used to drive the moving block (252) to withdraw from the clamping block (211).

6. The soft pack battery module assembly welding line according to claim 2, characterized in that: The battery module clamping assembly (22) comprises a rotating motor (221), a threaded rod (222), and two symmetrically arranged clamping blocks (223); the two clamping blocks (223) are both slidably arranged on the fixed base plate (21); the bottoms of the two clamping blocks (223) are both connected to threaded sleeves (224); the threads of the two threaded sleeves (224) are in opposite directions; the outer wall of the threaded rod (222) and the inner walls of the two threaded sleeves (224) are matched via threads; the output shaft of the rotating motor (221) is connected to one end of the threaded rod (222) and is used to drive the threaded rod (222) to rotate in a forward or reverse direction, thereby driving the two clamping blocks (223) to move towards or away from each other.

7. The soft pack battery module assembly welding line according to claim 1, characterized in that: The tab bending and rolling mechanism (4) comprises a first three-axis motion mechanism (41) and two sets of bending and rolling mechanisms, the two sets of bending and rolling mechanisms being symmetrically arranged on the first three-axis motion mechanism (41), and the bending and rolling mechanisms comprising a bending mechanism (42) and a rolling mechanism (43).

8. The soft pack battery module assembly welding line according to claim 1, characterized in that: The tab welding mechanism (5) comprises a clamping mechanism (51) and a welding mechanism (52); the clamping mechanism (51) comprises a No. 2 three-axis motion mechanism and two pressing head assemblies (511); the two pressing head assemblies (511) are symmetrically arranged on the No. 2 three-axis motion mechanism and are used to clamp the tab of the battery module; the welding mechanism (52) comprises a welding motion mechanism (521) and a galvanometer assembly (522); the galvanometer assembly (522) is arranged on the welding motion mechanism (521) and is used to weld the tab of the battery module.

9. The soft pack battery module assembly welding line according to claim 1, characterized in that: The post-weld detection mechanism (6) comprises a No. 3 three-axis motion mechanism and two micro-resistance testing and weld detection mechanisms (61). The two micro-resistance testing and weld detection mechanisms (61) are symmetrically arranged on the No. 3 three-axis motion mechanism. The micro-resistance testing and weld detection mechanism (61) comprises a micro-resistance testing mechanism (611) and a weld detection mechanism (612). The micro-resistance testing mechanism (611) is used to perform micro-resistance detection on a battery module, and the weld detection mechanism (62) is used to perform weld quality detection on a battery module.

10. The soft pack battery module assembly welding line according to claim 1, characterized in that: It also comprises an upper line docking platform (7) and a return flow docking platform (8); the conveying mechanism (1) comprises an upper working line (11) and a lower return flow line (12); the upper line docking platform (7) is arranged at the line ends of the upper working line (11) and the lower return flow line (12), and is used to lift the tooling fixture (2) from the lower return flow line (12) to the upper working line (11); the return flow docking platform (8) is arranged at the line ends of the upper working line (11) and the lower return flow line (12), and is used to lower the tooling fixture (2) from the upper working line (11) to the lower return flow line (12).

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