Device for reducing pseudo soldering of lithium battery module and welding method thereof

Abstract

The invention relates to the technical field of lithium battery module production and welding, and particularly discloses a device for reducing pseudo soldering of a lithium battery module and a welding method of the lithium battery module. A positioning frame; a shaping assembly; and welding the assembly. The lifting plate drives the positioning frame to move downwards through the portal frame, the positioning frame is located on the peripheries of the two pole columns, the first telescopic pieces on the two sides stretch to enable the pressing plates on the two sides to abut against the top ends of the two pole columns respectively, the heights of the two shaping frames are different, and the connecting piece moves to the two pole columns from the two shaping frames. Due to the fact that the heights of the two shaping frames are different, the connecting piece is bent and deformed in the moving process, the connecting piece can be matched with the two pole columns with the height difference, the connecting piece can be fully attached to the top ends of the two pole columns, and therefore the situation that due to the fact that one side of the connecting piece cannot be fully attached to the pole columns, pseudo soldering is caused is effectively avoided; and the qualified rate of the welded battery module is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery module welding, and particularly relates to a device for reducing virtual welding of lithium battery module welding and a welding method thereof. BACKGROUND

[0002] During production of a lithium battery PACK module, a plurality of groups of battery cells are assembled together in a series-parallel manner, and during assembly, a connecting sheet is used to connect the positive and negative poles of adjacent battery cells, so that the plurality of groups of battery cells are connected in series / parallel; the connecting sheet is generally welded to the pole of the battery cell by laser welding.

[0003] In actual production, the height of the pole on the battery cell may be deviated, and the connecting sheet has a certain hardness; if the connecting sheet is welded to the lower pole first, the other end of the connecting sheet is raised and cannot be in full contact with the top end of the higher pole; if the connecting sheet is welded to the higher pole first, the other end of the connecting sheet is in a suspended state and cannot be in contact with the top end of the lower pole; even if the connecting sheet is pressed down by the welding head during laser welding, the connecting sheet cannot be in contact with the top end of one of the poles due to poor flexibility of the connecting sheet; the area that is not in full contact forms virtual welding, which increases the contact resistance, and the welding point is prone to falling off or breaking during use, thereby reducing the manufacturing yield of the battery module and seriously causing safety risks during use. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides a device for reducing virtual welding of lithium battery module welding and a welding method thereof, so as to solve the technical problem that, when the connecting sheet is welded, the height difference between the two poles causes the connecting sheet to not be in contact with the top end of one of the poles, thereby causing virtual welding and resulting in unqualified lithium battery module.

[0005] The purpose of the present application can be achieved by the following technical solutions: A device for reducing virtual welding of lithium battery module welding, comprising a workbench, a gantry and a positioning plate, and further comprising: a lifting plate, the lifting plate being installed on the driving end of the gantry; a positioning frame, the positioning frame being installed below the lifting plate; The positioning frame is provided with a molding assembly installed in the positioning frame, the molding assembly comprises a pressing plate, symmetrically installed holes are formed on the positioning frame, a sliding block is longitudinally installed in the installed hole, a telescopic piece one is installed between the sliding block and the installed hole, the pressing plate is slidingly installed at the bottom of the sliding block, the pressing plate abuts against the top end of the pole, a N-shaped plate is slidingly installed at the bottom of the pressing plate, a molding frame is connected to the end of the N-shaped plate, symmetrically formed through holes are formed on the other two sides of the positioning frame, the molding frame passes through the through hole, the opposite sides of the two molding frames are in a hollow state, a notch is formed on the part of the molding frame in the positioning frame, the notch exposes the pole, the molding frame is above the pressing plate, the connecting piece is pushed into the two molding frames from the side of the two molding frames, and finally the connecting piece is pushed above the two poles. The welding assembly comprises a telescopic piece two and a welding head, the telescopic piece two is installed at the bottom of the lifting plate, two groups of welding heads are installed at the output end of the telescopic piece two, the two groups of welding heads correspond to the two poles, and the two groups of welding heads are inserted into the positioning frame.

[0006] As a preferred embodiment of the above technical scheme, the two ends of the molding frame are provided with an adjusting assembly, and the adjusting assembly comprises: A fixed frame is fixed to the side of the positioning frame, and the two groups of molding frames are longitudinally slidingly installed on the inner wall of the fixed frame. A guide plate is hinged to the bottom of one end of the fixed frame, both ends of the guide plate are provided with a sliding rod, a groove is formed in the bottom of the inner cavity of the fixed frame, and the sliding rod is slidingly installed on the side wall of the groove. Two top plates are installed at the top of the inner cavity of the fixed frame, an elastic piece one is connected between the top plate and the fixed frame, and the bottom of the top plate abuts against the top of the molding frame.

[0007] As a preferred embodiment of the above technical scheme, the other side of the fixed frame is provided with a storage box, the storage box penetrates through and is fixed to the lifting plate, the connecting piece is stored in the storage box, symmetrically formed pushing holes are formed on the storage box, a pushing assembly is installed at the pushing hole, the pushing assembly comprises a telescopic piece four, the telescopic piece four is installed on the side of the storage box away from the fixed frame, a connecting piece is connected to the output end of the telescopic piece four, a pushing plate is arranged at the other end of the connecting piece, and the pushing plate penetrates into the pushing hole.

[0008] As a preferred embodiment of the above technical scheme, the bottom of the lifting plate is provided with a pressing assembly, the pressing assembly comprises a telescopic piece three, the telescopic piece three is installed at the bottom of the lifting plate, a pressing frame is installed at the output end of the telescopic piece three, and the pressing frame is located outside the two welding heads.

[0009] As a preferred embodiment of the above technical scheme, a transmission assembly is installed between the molding assembly and the pressing frame, and the transmission assembly comprises: a gear mounted on the sliding block; a first toothed plate mounted on the top of the pressing plate, and the first toothed plate is engaged with the gear; a second toothed plate mounted on the two sides of the pressing frame, and the second toothed plate is engaged with the gear, and the second toothed plate is perpendicular to the first toothed plate.

[0010] As a preferred technical solution of the above, the top of the pressing plate is provided with a telescopic slot, one end of the first toothed plate is slidingly mounted in the telescopic slot, and the first toothed plate is connected with the telescopic slot through the second elastic member.

[0011] As a preferred technical solution of the above, the cleaning brush is slidingly mounted on the inner wall of the shaping frame, and the wiping strip is mounted in the pushing hole of the storage box close to the fixed frame.

[0012] A welding method of a device for reducing virtual welding of lithium battery module welding, the method is applied to the device for reducing virtual welding of lithium battery module welding as described above, and the method comprises the following steps: Step S1: a plurality of connecting pieces are placed in two storage boxes, then the position of the lifting plate is adjusted through the gantry, the positioning frame is lowered above the two pole columns, and the two pressing plates are respectively pressed against the top ends of the two pole columns through the first telescopic member; Step S2: the lowermost connecting piece of the storage box is pushed into the fixed frame through the pushing assembly, the connecting piece continuously moves into the shaping frame and is deformed by bending, and finally moves above the two pole columns; Step S3: the lower pressing frame is lowered to be sleeved on the periphery of the connecting piece, and then the two welding heads are lowered to press the connecting piece for laser welding; Step S4: after welding, the welding heads, the lower pressing frame and the lifting plate are withdrawn in sequence, and one welding is completed, and other connecting pieces are welded according to the above steps.

[0013] The beneficial effects of the present application are: 1、In the present application, the lifting plate with the positioning frame is lowered through the gantry, the positioning frame is located around the two pole columns, and when the positioning frame is flush with the top of the battery cell, the movement is stopped, then the two pressing plates are respectively pressed against the top ends of the two pole columns through the elongation of the telescopic members on the two sides, due to the height difference between the two pole columns, the heights of the two pressing plates are different, so that the heights of the two shaping frames are different, at this time, the connecting piece is inserted into the two shaping frames, and the connecting piece moves from the two shaping frames to the two pole columns, when the connecting piece moves, due to the height difference between the two shaping frames, the connecting piece is deformed by bending when moving, so that the connecting piece can adapt to the two pole columns with height difference, so that the connecting piece can fully fit the top ends of the two pole columns, thereby effectively avoiding the situation that virtual welding is caused by the fact that one side of the connecting piece cannot fully fit the pole column, and ensuring the qualified rate of the battery module after welding; 2、The connecting sheet is first inserted into the fixed frame before being inserted into the two shaping frames, and the inclination of the guide plate is automatically adjusted following the height of the shaping frame when the connecting sheet is moving, the connecting sheet first contacts the guide plate with small inclination and slowly moves up, and the other side of the connecting sheet is blocked by the top plate above the guide plate with large inclination when moving up, so that the side of the connecting sheet is deformed by bending, thereby preliminarily deforming the connecting sheet, and the connecting sheet will slowly enter the two shaping frames after continuing to move, and the connecting sheet is completely deformed by bending after entering the two shaping frames, so that the connecting sheet is not easily blocked when entering the two shaping frames, thereby improving the bending deformation efficiency of the connecting sheet; 3、In the present application, after the connecting sheet is completely inserted into the two shaping frames, the top and bottom of the connecting sheet are clamped by the two shaping frames, so that the two different height surfaces formed by bending the bottom of the connecting sheet remain in a flush state, so that when the connecting sheet moves above the two pole columns, the bottom of the connecting sheet can better fit the top end of the pole column, thereby effectively avoiding the situation that the connecting sheet cannot fully fit the pole column on one side, causing a virtual welding, further ensuring the qualified rate of the battery module after welding; The connecting sheet needs to move a distance in the two shaping frames, so that the connecting sheet can be shaped after deformation, avoiding the phenomenon that the connecting sheet rebounds when moving above the two pole columns after deformation, thereby ensuring that the two different height surfaces of the bottom of the connecting sheet are always in a flush state after deformation, so that the bottom of the connecting sheet can better fit the top end of the pole column, thereby effectively avoiding the situation that the connecting sheet cannot fully fit the pole column on one side, causing a virtual welding, further ensuring the qualified rate of the battery module after welding. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure when spot welding; Figure 3 It is a schematic diagram of the structure after separating part of the structure; Figure 4 It is a schematic diagram of the internal structure of the storage box; Figure 5 It is a schematic diagram of the structure of the adjusting assembly; Figure 6 It is a schematic diagram of the structure of the shaping assembly; Figure 7 It is a schematic diagram of the structure of the transmission assembly; Figure 8 It is a schematic diagram of the structure of the cleaning brush.

[0015] In the drawings: 1. Lifting plate; 2. Positioning frame; 21. Mounting hole; 22. Through hole; 3. Shaping component; 31. Pressure plate; 32. Shaping frame; 321. U-shaped plate; 33. Slider; 34. Telescopic component one; 4. Adjustment component; 41. Fixing frame; 411. Groove; 42. Guide plate; 421. Slide rod; 43. Top plate; 431. Elastic component one; 5. Storage box; 51. Wiping strip; 6. Welding component; 61. Telescopic component two; 62. Welding head; 7. Pressing component; 71. Telescopic component three; 72. Pressing frame; 8. Transmission component; 81. Gear; 82. Gear plate one; 83. Gear plate two; 84. Elastic component two; 9. Pushing component; 91. Telescopic component four; 92. Connector; 93. Push plate; 10. Cleaning brush; 11. Workbench; 12. Gantry frame; 13. Positioning plate. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figures 1-7 As shown, an apparatus for reducing cold solder joints in lithium battery modules includes a workbench 11, a gantry frame 12, and a positioning plate 13. The apparatus further includes: Lifting plate 1 is installed on the drive end of the gantry frame 12; Positioning frame 2 is installed below the lifting plate 1; The shaping component 3 is installed inside the positioning frame 2. The shaping component 3 includes a pressure plate 31. The positioning frame 2 has symmetrically opened mounting holes 21. A slider 33 is longitudinally slidably installed in the mounting holes 21. A telescopic component 34 is installed between the slider 33 and the mounting holes 21. The pressure plate 31 is slidably installed at the bottom of the slider 33 and abuts against the top of the pole. A U-shaped plate 321 is slidably installed at the bottom of the pressure plate 31. The end of the U-shaped plate 321 is connected to the shaping frame 32. The other two sides of the positioning frame 2 have symmetrically opened through holes 22. The shaping frame 32 passes through the through holes 22. The opposite side of the two sets of shaping frames 32 is hollow. The part of the shaping frame 32 located inside the positioning frame 2 has a notch. This notch exposes the pole. The shaping frame 32 is located above the pressure plate 31. The connecting piece is pushed into the two sets of shaping frames 32 from the side and finally pushed above the two poles. The welding assembly 6 comprises the telescopic member two 61 and the welding head 62. The telescopic member two 61 is installed at the bottom of the lifting plate 1. The output end of the telescopic member two 61 is provided with two groups of welding heads 62. The two groups of welding heads 62 correspond to two pole columns. The two groups of welding heads 62 extend into the positioning frame 2.

[0018] In one case of the embodiment, the telescopic member one 34 can be a pneumatic cylinder or other component capable of driving the sliding block 33 to move the pressing plate 31 downward and fixed.

[0019] In actual application, the gantry 12 drives the lifting plate 1 and the positioning frame 2 to move downward, so that the positioning frame 2 is located at the periphery of the two pole columns. When the positioning frame 2 is flush with the top of the battery cell, the movement is stopped. Then the telescopic member one 34 on both sides is elongated to make the pressing plate 31 on both sides abut against the top end of the two pole columns, respectively. Due to the height difference between the two pole columns, the height of the two pressing plates 31 is different, so that the height of the two shaping frames 32 is different. At this time, the connecting sheet is inserted into the two shaping frames 32, so that the connecting sheet moves from the two shaping frames 32 to the two pole columns. When the connecting sheet moves, due to the height difference between the two shaping frames 32, the connecting sheet is bent and deformed during the movement, so that the connecting sheet can adapt to the two pole columns with height difference. Since the height difference between the two shaping frames 32 is determined by the height difference between the two pressing plates 31, and the height difference between the two pressing plates 31 is determined by the height difference between the two pole columns, the connecting sheet can fully fit the top end of the two pole columns. At this time, the connecting sheet is laser welded by the welding head 62. Thus, the height difference between the different pole columns can be automatically adapted, so as to effectively avoid the situation that the connecting sheet cannot fully fit the pole column on one side, causing virtual welding, and ensure the qualified rate of the battery module after welding. The position of the two pole columns can be positioned by the positioning frame 2, so that the position of the connecting sheet is relatively accurate after the connecting sheet moves to the two pole columns. Moreover, due to the limitation of the positioning frame 2, the connecting sheet is not easy to deviate during welding, so as to effectively avoid virtual welding caused by inaccurate position of the connecting sheet, and further ensure the quality of the lithium battery module after welding. The telescopic member two 61 is provided with two welding heads 62 through a connecting frame. The connecting frame can be telescopic. The two welding heads 62 are laser welded by moving downward and pressing the two sides of the connecting sheet at the same time. Thus, compared with single welding head 62 welding, the situation that the connecting sheet is raised on one end is effectively avoided. Moreover, the two welding heads 62 can better contact the two planes of the top of the connecting sheet after bending through the telescopic connecting frame, so as to effectively avoid the situation that the connecting sheet cannot fully fit the pole column on one side, causing virtual welding, and ensure the qualified rate of the battery module after welding. At the same time, the two welding heads 62 press the connecting sheet at the same time, so that the connecting sheet remains in a fixed state during welding, further avoiding deviation of the connecting sheet during welding, so as to further effectively avoid virtual welding caused by inaccurate position of the connecting sheet, and further ensure the quality of the lithium battery module after welding.

[0020] Further, the two ends of the shaping frame 32 are provided with an adjusting assembly 4, which comprises: A fixed frame 41 is fixed to the side of the positioning frame 2, and the two groups of shaping frames 32 are longitudinally slidingly installed on the inner wall of the fixed frame 41; A guide plate 42 is hinged to the bottom of one end of the fixed frame 41, and the two ends of the guide plate 42 are provided with sliding rods 421, and the bottom of the inner cavity of the fixed frame 41 is provided with a groove 411, and the sliding rod 421 is slidingly installed on the side wall of the groove 411; Two top plates 43 are installed on the top of the inner cavity of the fixed frame 41, and the elastic member one 431 is connected between the top plate 43 and the fixed frame 41, and the bottom of the top plate 43 abuts against the top of the shaping frame 32.

[0021] In one case of the embodiment, the elastic member one 431 can be a spring, or other components that can make the top plate 43 abut against the top of the shaping frame 32.

[0022] In actual application, the connecting piece is first inserted into the fixed frame 41 before being inserted into the two shaping frames 32, and when the connecting piece moves, the inclination of the guide plate 42 is automatically adjusted according to the height of the shaping frame 32, the connecting piece first contacts the guide plate 42 with small inclination and slowly moves upward, and when moving upward, the other side of the connecting piece is blocked by the top plate 43 above the guide plate 42 with large inclination, so that the connecting piece is preliminarily bent and deformed, and after the connecting piece continues to move, the connecting piece slowly enters the two shaping frames 32, and after the connecting piece completely enters the two shaping frames 32, the connecting piece is completely bent and deformed, so that the connecting piece is not easily blocked when entering the two shaping frames 32, thereby improving the bending and deforming efficiency of the connecting piece; After the connecting piece completely enters the two shaping frames 32, the top and bottom of the connecting piece are clamped by the two shaping frames 32, so that the two surfaces with different heights formed after the bottom of the connecting piece is bent remain in a flush state, so that when the connecting piece moves above the two pole columns, the bottom of the connecting piece can better fit the top end of the pole column, thereby effectively avoiding the situation that the connecting piece cannot fully fit the pole column on one side, causing a virtual welding, and ensuring the qualified rate of the battery module after welding; The connecting piece needs to move a distance in the two shaping frames 32, so that the connecting piece can be shaped after being bent and deformed, avoiding the phenomenon that the connecting piece rebounds when moving above the two pole columns after being deformed, thereby ensuring that the two surfaces with different heights at the bottom of the connecting piece are always in a flush state after being deformed, so that the bottom of the connecting piece can better fit the top end of the pole column, thereby effectively avoiding the situation that the connecting piece cannot fully fit the pole column on one side, causing a virtual welding, and further ensuring the qualified rate of the battery module after welding.

[0023] Further, the other side of the fixed frame 41 is provided with a storage box 5, the top of the storage box 5 penetrates through the lifting plate 1 and is fixed on the lifting plate 1, the storage box 5 stores connecting pieces, symmetrically provided with a pushing hole on the storage box 5, and a pushing assembly 9 is installed at the pushing hole, the pushing assembly 9 comprises a telescopic piece four 91, the telescopic piece four 91 is installed on the side of the storage box 5 away from the fixed frame 41, the output end of the telescopic piece four 91 is connected with a connecting piece 92, and the other end of the connecting piece 92 is provided with a pushing plate 93, the pushing plate 93 extends into the pushing hole.

[0024] In one case of the embodiment, the telescopic piece four 91 can be a pneumatic cylinder, or can be other components capable of driving the pushing plate 93 to move.

[0025] In actual application of the embodiment, a large number of connecting pieces can be stored in the storage box 5, and the lowermost connecting piece is pushed into the two shaping frames 32 by the pushing assembly 9, so that the automatic feeding of the connecting pieces is realized, and thus the workers are not required to place the connecting pieces one by one, thereby improving the welding efficiency.

[0026] Further, the bottom of the lifting plate 1 is provided with a pressing assembly 7, the pressing assembly 7 comprises a telescopic piece three 71, the telescopic piece three 71 is installed on the bottom of the lifting plate 1, and the output end of the telescopic piece three 71 is provided with a pressing frame 72, the pressing frame 72 is located outside the two welding heads 62.

[0027] In one case of the embodiment, the telescopic piece three 71 can be a pneumatic cylinder, or can be other components capable of driving the pressing frame 72 to move.

[0028] In actual application of the embodiment, when the connecting piece moves above the two pole columns, the telescopic piece three 71 is elongated to make the pressing frame 72 move downward to be sleeved on the periphery of the connecting piece, so that the position of the connecting piece is fixed and cannot be deviated before welding, and since one of the two welding heads 62 will first contact the top of one side of the connecting piece when the two welding heads 62 move downward, the connecting piece is effectively limited, so that the position deviation of the connecting piece caused by the downward pressing of the welding head 62 on the connecting piece is avoided, thereby further effectively avoiding the virtual welding caused by the inaccurate position of the connecting piece, and further ensuring the quality of the lithium battery module after welding.

[0029] Further, a transmission assembly 8 is installed between the shaping assembly 3 and the pressing frame 72, the transmission assembly 8 comprises: a gear 81, the gear 81 is installed on the sliding block 33; a toothed plate one 82, the toothed plate one 82 is installed on the top of the pressing plate 31 and is in mesh with the gear 81; a toothed plate two 83, the toothed plate two 83 is installed on the two sides of the pressing frame 72 and is in mesh with the gear 81, and the toothed plate two 83 is perpendicular to the toothed plate one 82.

[0030] Further, the top of the pressing plate 31 is provided with an extension slot, one end of the first toothed plate 82 is slidingly installed in the extension slot, and the first toothed plate 82 is connected with the extension slot through the second elastic member 84.

[0031] In one case of the embodiment, the second elastic member 84 can be a spring, and can also be other components capable of elastic extension and contraction.

[0032] In actual application of the embodiment, since the pressing plate 31 is arranged above the pole, when the connecting piece moves to the upper side of the pole, the bottom of the connecting piece can be arranged above the pressing plate 31, and if the connecting piece is welded, the area of the connecting piece arranged at the pressing plate 31 can be warped, which can cause incomplete welding of the connecting piece, and thus can cause the situation of virtual welding between the connecting piece and the pole. When the lower pressing frame 72 moves downward, the second toothed plate 83 on the lower pressing frame 72 can slowly approach the gear 81 and drive the gear 81 to rotate, and after the gear 81 rotates, the gear 81 can drive the first toothed plate 82 to move away from the shaping frame 32, so that the first toothed plate 82 drives the pressing plate 31 to move away from the shaping frame 32, and the pressing plate 31 moves away from the pole, so that the bottom of the connecting piece can be completely attached to the top end of the pole, which can effectively avoid the situation that the connecting piece cannot be completely attached due to incomplete welding, and further effectively avoid the situation of virtual welding between the connecting piece and the pole, and further ensure the qualified rate of the battery module after welding.

[0033] As shown in Figure 4 and Figure 8 , the cleaning brush 10 is slidingly installed on the inner wall of the shaping frame 32, and the wiping strips 51 are installed in the pushing holes of the storage boxes 5 close to the fixed frame 41.

[0034] In actual application of the embodiment, when the pushing assembly 9 pushes the connecting piece away from the storage box 5, the top and bottom of the connecting piece are respectively in contact with the upper and lower wiping strips 51, so that the wiping strips 51 clean the impurities on the surface of the connecting piece. When the connecting piece enters the two shaping frames 32, the cleaning brush 10 can be driven to move towards the pole when the connecting piece moves, so that the cleaning brush 10 cleans the top end of the pole. Since two groups of storage boxes 5 are provided, the two groups of storage boxes 5 can be alternately fed in actual use, so that the cleaning brush 10 can always clean the top end of the pole. In summary, the top and bottom of the connecting piece are cleaned by the wiping strips 51, and the top ends of the two poles are cleaned by the cleaning brush 10, which can effectively avoid the situation that the connecting piece is virtually welded due to impurities remaining on the surface of the connecting piece or the top end of the pole, and further effectively avoid the situation of virtual welding between the connecting piece and the pole, and further ensure the qualified rate of the battery module after welding.

[0035] A welding method of a device for reducing virtual welding of lithium battery module welding, the method is applied to the device for reducing virtual welding of lithium battery module welding as described above, and the method comprises the following steps: Step S1: Put several connecting pieces into two storage boxes 5, then adjust the position of the lifting plate 1 through the gantry 12, so that the positioning frame 2 is lowered above the two pole columns, and at the same time, the two pressing plates 31 are respectively pressed against the top ends of the two pole columns through the telescopic part 34; Step S2: Push the lowermost connecting piece in the storage box 5 into the fixing frame 41 through the pushing assembly 9, and the connecting piece continuously moves into the shaping frame 32 to be bent and deformed, and finally moves above the two pole columns; Step S3: Lower the pressing frame 72 to make the pressing frame 72 fit around the connecting piece, and then lower the two welding heads 62 to press the connecting piece to perform laser welding; Step S4: After welding, the welding heads 62, the pressing frame 72 and the lifting plate 1 are withdrawn in turn, and one welding is completed. Other connecting pieces are welded according to the above steps.

[0036] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A device for reducing false welding of lithium battery module welding, comprising a workbench (11), a gantry (12) and a positioning plate (13), characterized in that, The device also includes: Lifting plate (1), the driving end of the gantry (12) is provided with a lifting plate (1); Positioning frame (2), the lifting plate (1) is provided with a positioning frame (2) below; Shaping assembly (3), the positioning frame (2) is provided with a shaping assembly (3) inside, the shaping assembly (3) comprises a pressing plate (31), the positioning frame (2) is provided with a mounting hole (21) symmetrically on the upper surface, the mounting hole (21) is provided with a sliding block (33) slidingly installed inside in the longitudinal direction, the sliding block (33) and the mounting hole (21) are provided with a telescopic member (34) therebetween, the pressing plate (31) is slidingly installed at the bottom of the sliding block (33), the pressing plate (31) is abutted against the top end of the pole, the bottom of the pressing plate (31) is slidingly provided with a N-shaped plate (321), the end of the N-shaped plate (321) is connected with a shaping frame (32), the positioning frame (2) is provided with a through hole (22) symmetrically on the other two surfaces, the shaping frame (32) penetrates through the through hole (22), the opposite sides of the two groups of shaping frames (32) are in a hollow state, the part of the shaping frame (32) located inside the positioning frame (2) is provided with a notch, which exposes the pole, the shaping frame (32) is located above the pressing plate (31), the connecting sheet is pushed into the two groups of shaping frames (32) from the side surface of the two groups of shaping frames (32), and finally the connecting sheet is pushed above the two poles; Welding assembly (6), the welding assembly (6) comprises a telescopic member (61) and a welding head (62), the telescopic member (61) is installed at the bottom of the lifting plate (1), and the output end of the telescopic member (61) is provided with two groups of welding heads (62). Two groups of the welding heads (62) correspond to two poles, and two groups of welding heads (62) are inserted into the positioning frame (2).

2. The apparatus of claim 1, wherein, Both ends of the shaping frame (32) are provided with an adjusting assembly (4), and the adjusting assembly (4) comprises: Fixed frame (41), the fixed frame (41) is fixed on the side surface of the positioning frame (2), and the two groups of shaping frames (32) are slidingly installed on the inner wall of the fixed frame (41) in the longitudinal direction; Guide plate (42), the bottom of one end of the positioning frame (2) located in the fixed frame (41) is hinged with a guide plate (42), both ends of the guide plate (42) are provided with a sliding rod (421), and the bottom of the inner cavity of the fixed frame (41) is provided with a groove (411); Top plate (43), two top plates (43) are installed at the top of the inner cavity of the fixed frame (41), and the top plate (43) is connected with the fixed frame (41) through an elastic member (431), and the bottom of the top plate (43) is abutted against the top of the shaping frame (32).

3. The apparatus of claim 2, wherein, The other side of the fixed frame (41) is provided with a storage box (5), the top of the storage box (5) penetrates through the lifting plate (1) and is fixed on the lifting plate (1), the storage box (5) is provided with a connecting piece, the storage box (5) is provided with a pushing hole symmetrically, the pushing assembly (9) is installed on the pushing hole, the pushing assembly (9) comprises a telescopic piece four (91), the telescopic piece four (91) is installed on the side of the storage box (5) away from the fixed frame (41), the output end of the telescopic piece four (91) is connected with a connecting piece (92), the other end of the connecting piece (92) is provided with a push plate (93), and the push plate (93) extends into the pushing hole.

4. The apparatus of claim 3, wherein, The bottom of the lifting plate (1) is provided with a pressing assembly (7), the pressing assembly (7) comprises a telescopic piece three (71), the telescopic piece three (71) is installed on the bottom of the lifting plate (1), and the output end of the telescopic piece three (71) is provided with a pressing frame (72). The pressing frame (72) is located outside the two welding heads (62).

5. The apparatus of claim 4, wherein, The transmission assembly (8) is installed between the shaping assembly (3) and the pressing frame (72), and the transmission assembly (8) comprises: A gear (81) is installed on the sliding block (33); A toothed plate one (82) is installed on the top of the pressing plate (31), and the toothed plate one (82) is in meshing connection with the gear (81); A toothed plate two (83) is installed on the two sides of the pressing frame (72), and the toothed plate two (83) is in meshing connection with the gear (81). The toothed plate two (83) is perpendicular to the toothed plate one (82).

6. The apparatus of claim 5, wherein, The top of the pressing plate (31) is provided with a telescopic slot, one end of the toothed plate one (82) is slidably installed in the telescopic slot, and the toothed plate one (82) and the telescopic slot are connected with an elastic piece two (84).

7. The apparatus of claim 3, wherein, A cleaning brush (10) is slidably installed on the inner wall of the shaping frame (32), and wiping strips (51) are installed in the pushing hole of the storage box (5) near the fixed frame (41).

8. A welding method of a device for reducing virtual welding of lithium battery module welding, the method is applied to the device for reducing virtual welding of lithium battery module welding as claimed in any one of claims 1-7, and the method comprises the following steps: Step S1: a plurality of connecting pieces are placed in the two storage boxes (5), then the position of the lifting plate (1) is adjusted through the gantry (12), the positioning frame (2) is lowered to above the two pole columns, and the two pressing plates (31) are respectively abutted against the top ends of the two pole columns through the telescopic piece one (34); Step S2: the lowermost connecting piece in the storage box (5) is pushed into the fixed frame (41) through the pushing assembly (9), the connecting piece continuously moves into the shaping frame (32) and is deformed by being bent, and finally moves to above the two pole columns; Step S3: the pressing frame (72) is lowered to be sleeved on the periphery of the connecting piece, and the two welding heads (62) are lowered to press the connecting piece for laser welding. Step S4: after welding, the welding head (62), the pressing frame (72) and the lifting plate (1) are withdrawn in sequence, and one welding is completed. Other connecting pieces are welded according to the above steps.

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