Battery pack assembling device

Abstract

The battery pack assembling device comprises an operation table, a conveying mechanism, a positive electrode spot welding mechanism, a turnover mechanism and a negative electrode spot welding mechanism, the positive electrode spot welding mechanism and the negative electrode spot welding mechanism are located on the two sides of the turnover mechanism respectively, and the turnover mechanism and the conveying mechanism are both located on the operation table; and the turnover mechanism is used for turning over the battery monomers from the positive electrode conveying strip to the negative electrode conveying strip or turning over the battery monomers from the negative electrode conveying strip to the positive electrode conveying strip. According to the invention, the positive and negative electrode plates can be welded on the front and back surfaces of the battery monomer, after one surface of the battery monomer is welded with the positive or negative electrode plate, the battery monomer can be turned over and then the negative or positive electrode plate is welded, and in the process of moving the battery monomer and turning over the battery monomer, the welding efficiency is greatly improved. The battery monomers can be positioned in the accommodating grooves, and the accuracy of the welding positions of the front and back electrode plates is ensured, so that the welding reliability of the electrode plates is ensured.

Description

Technical Field

[0001] The present invention relates to a battery packaging and assembling device. Background Art

[0002] With the continuous development of new energy, electric vehicles have been widely promoted and used. As the core energy storage component of new energy vehicles, the assembly quality of the battery pack is directly related to the performance, safety and reliability of the vehicle. During the assembly process of the battery pack for new energy vehicles, there are multiple key links and complex technical requirements. The battery pack of an electric vehicle includes multiple battery cells, and each battery cell is connected with positive and negative electrodes. Since the positive and negative electrodes need to be welded on the front and back sides of the battery cell, the welding mechanism can weld the electrode plates on the battery cell. After welding the positive or negative electrode plate on one side of the battery cell, it is necessary to turn over the battery cell and then weld the negative or positive electrode plate. Therefore, after turning over, it is necessary to ensure the accurate positioning of the battery cell to ensure the accuracy of the welding positions of the electrode plates on the front and back sides, thereby ensuring the reliability of the electrode plate welding. Deviation of the welding position may cause the electrode plate to easily fall off or protrude from the battery cell and be prone to collision and dropping. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: In order to achieve reliable connection between the battery cell and the electrode and realize automatic assembly, the present invention provides a battery packaging and assembling device.

[0004] The technical solution adopted by the present invention to solve its technical problems is: A battery packaging and assembling device includes an operation table, a conveying mechanism, a positive electrode spot welding mechanism, a turning mechanism and a negative electrode spot welding mechanism. The positive electrode spot welding mechanism and the negative electrode spot welding mechanism are respectively located on both sides of the turning mechanism, and both the turning mechanism and the conveying mechanism are located on the operation table; the conveying mechanism includes a positive electrode conveying strip and a negative electrode conveying strip. The turning mechanism is located between the positive electrode conveying strip and the negative electrode conveying strip. Both the positive electrode conveying strip and the negative electrode conveying strip include two relatively arranged tracks, and a plurality of grooves are formed on the opposite surfaces of the tracks. The two relatively arranged tracks are spaced apart so that there is a strip-shaped sliding space between the two tracks. The grooves of the two tracks are opposite to form a receiving groove matching the outer diameter of the battery cell. One of the two tracks has a notch; the turning mechanism is used to turn over the battery cell from the positive electrode conveying strip to the negative electrode conveying strip or from the negative electrode conveying strip to the positive electrode conveying strip. Here, turning over means turning the battery cell over.

[0005] The positive spot welding mechanism and the negative spot welding mechanism both include an electrode sheet loading mechanism, a feeding mechanism and a spot welding assembly. The feeding mechanism is fixed under the operating table, and the feeding mechanism of the positive spot welding mechanism is located below the positive electrode conveying bar, and the feeding mechanism of the negative spot welding mechanism is located below the negative electrode conveying bar. The feeding mechanism is used to drive the battery cell to move from one accommodating slot to another accommodating slot; the spot welding assembly includes a spot welding unit and a positioning unit, and the spot welding unit is located above the positive electrode conveying bar or the negative electrode conveying bar.

[0006] The flipping mechanism includes a flipping drive assembly, a rotating rod and a chuck, wherein the chuck is fixed on the rotating rod, and the rotating rod is fixed to the operating table through a supporting seat, and the flipping drive assembly drives the rotating rod to rotate, and the electrode sheet feeding mechanism includes a stepping motor, a turntable and a plurality of clamping plates, and the stepping motor drives the turntable to rotate, and each clamping plate is evenly distributed on the turntable, one end of each clamping plate is fixed to the turntable, and the other end of the clamping plate has a protruding clamping end, and the protruding clamping end has a spot welding groove and a suction cup, and the suction cup is located on the lower surface of the clamping plate.

[0007] The extended clamping end of the electrode sheet feeding mechanism is also provided with a positioning bayonet.

[0008] The flip driving assembly comprises a flip cylinder, a connecting rod, a rack and a gear. The flip cylinder is transmission-connected to the rack through the connecting rod. The rack is meshed with the gear. The gear is coaxially fixed with the rotating rod.

[0009] The spot welding unit includes a displacement drive mechanism and a spot welding head. The displacement drive mechanism is arranged on the operating table. The displacement drive mechanism drives the spot welding head to move. The electric welding head is located directly above the positive electrode conveying bar or the negative electrode conveying bar. The displacement drive mechanism mainly realizes the up and down movement of the spot welding head to avoid interference when the electrode sheet is loaded and the battery cell is moved. For example, the spot welding head can be driven by a cylinder to achieve up and down movement. The positioning unit and the electrode sheet loading mechanism are respectively located on both sides of the positive electrode conveying bar or the negative electrode conveying bar and are arranged oppositely. The positioning unit includes a pushing cylinder and a push plate. The cylinder body of the pushing cylinder is fixed to the operating table. One of the two tracks has a notch. The push plate is located in the notch of the track with the notch. The protruding end of the pushing cylinder is fixed to one side of the push plate, and the other side of the push plate faces the other track, that is, the track without the notch, the track opposite to the track with the notch.

[0010] The feeding mechanism includes a left - right moving unit and an up - down moving unit. The up - down moving unit includes a lower air cylinder and a fixing plate. The extending end of the lower air cylinder is fixed to the fixing plate, and the cylinder body of the lower air cylinder is fixed through a base other than the operating table. The left - right moving unit includes an upper air cylinder, a slide rail, and a connecting block. The slide rail is fixed on the fixing plate. The cylinder body of the upper air cylinder is fixed to the fixing plate, and the extending end of the upper air cylinder is fixed to the connecting block. A plurality of sliders are provided at the bottom of the connecting block, and the connecting block is slidably connected to the slide rail through the sliders. A number of support rods are fixed to the top of the connecting block. The interval between each pair of support rods is equal to the interval between each accommodating groove formed by the two tracks, and an adsorption unit is provided at the top end of each support rod. The outer diameter of the support rod matches the inner diameter of the strip - shaped sliding space. One end of the support rod is fixed to the connecting block, and the other end of the support rod extends into the strip - shaped sliding space or the accommodating groove 5.

[0011] The feeding mechanism further includes a limiting unit. The limiting unit includes a limiting column and a limiting block. The limiting column passes through the limiting block and is slidably connected to the limiting block. One end of the limiting column is fixed to the operating table, and the other end of the limiting column is relatively fixed in position with the cylinder body of the lower air cylinder. The limiting block is fixed to the fixing plate.

[0012] The chuck includes two clamping rods, and the two clamping rods of the chuck are driven to move away from or towards each other by a chuck driving assembly.

[0013] The rotating rod and the support seat are rotatably connected through a bearing.

[0014] The groove is an arc - shaped groove, and the accommodating groove is a circular groove. Of course, the accommodating groove can also be of other shapes, which is determined by the shape of the battery cell.

[0015] The beneficial effect of the present invention is that a battery packaging and assembling device of the present invention can weld the positive and negative electrode plates on the front and back sides of the battery cell. After welding the positive or negative electrode plate on one side of the battery cell, the battery cell can be turned over and then the negative or positive electrode plate can be welded. Moreover, during the process of moving the battery cell and turning it over, the battery cell can be guaranteed to be positioned in the accommodating groove, ensuring the accuracy of the welding positions of the electrode plates on the front and back sides, thereby ensuring the reliability of the electrode plate welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a schematic structural diagram of the battery packaging and assembling device of the present invention.

[0018] Figure 2 is Figure 1 a partial enlarged view of part A in

[0019] Figure 3It is a top - view structural schematic diagram of the battery packaging and assembling device of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the flipping mechanism of the battery packaging and assembling device of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the spot - welding unit of the battery packaging and assembling device of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the electrode - sheet feeding mechanism of the battery packaging and assembling device of the present invention.

[0023] Figure 7 It is a structural schematic diagram of an embodiment of the clamping piece of the electrode - sheet feeding mechanism of the battery packaging and assembling device of the present invention.

[0024] Figure 8 It is a structural schematic diagram of another embodiment of the clamping piece of the electrode - sheet feeding mechanism of the battery packaging and assembling device of the present invention.

[0025] Figure 9 It is a structural schematic diagram of the feeding mechanism of the battery packaging and assembling device of the present invention.

[0026] In the figure, 1 is the operating table, 2 is the positive - electrode conveying strip, 3 is the negative - electrode conveying strip, 4 is the strip - shaped sliding space, 5 is the accommodating groove, 6 is the notch, 7 is the stepping motor, 8 is the turntable, 9 is the clamping piece, 9 - 1 is the protruding clamping end, 9 - 2 is the spot - welding groove, 9 - 3 is the positioning bayonet, 10 is the pushing cylinder, 11 is the push plate, 12 is the flipping driving assembly, 13 is the rotating rod, 14 is the chuck, 15 is the support seat, 16 is the flipping cylinder, 17 is the connecting rod, 18 is the rack, 19 is the bearing, 20 is the displacement driving mechanism, 21 is the spot - welding head, 22 is the lower cylinder, 23 is the fixing plate, 24 is the upper cylinder, 25 is the slide rail, 26 is the connecting block, 27 is the slider, 28 is the support rod, 29 is the limiting column, 30 is the limiting block, 100 is the battery cell, 200 is the electrode sheet. Detailed implementation manners

[0027] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic way, so they only show the components related to the present invention.

[0028] Such as Figure 1 、 3As shown, a battery pack assembly device of the present invention includes an operating table 1, a conveying mechanism, a positive spot welding mechanism, a flipping mechanism and a negative spot welding mechanism. The positive spot welding mechanism and the negative spot welding mechanism are respectively located on both sides of the flipping mechanism, and the flipping mechanism and the conveying mechanism are both located on the operating table 1. The conveying mechanism includes a positive conveying bar 2 and a negative conveying bar 3. The flipping mechanism is located between the positive conveying bar 2 and the negative conveying bar 3. The positive conveying bar 2 and the negative conveying bar 3 each include two tracks arranged opposite to each other, and a plurality of grooves are provided on the opposite surfaces of the tracks. The two tracks arranged opposite to each other are arranged at intervals so that there is a strip-shaped sliding space 4 between the two tracks. The grooves of the two tracks are relatively formed to form a receiving groove 5 matching the outer diameter of the battery cell 100, and one of the two tracks has a notch 6. The groove is an arc groove, and the receiving groove 5 is a circular groove. Of course, the receiving groove 5 can also be of other shapes, which is determined by the shape of the battery cell 100. The receiving groove 5 matches the outer diameter of the battery cell 100, so that the battery cell 100 can be ensured not to be offset when being conveyed on the positive conveying bar 2 and the negative conveying bar 3.

[0029] The flipping mechanism is used to flip the battery cell 100 from the positive electrode conveying bar 2 to the negative electrode conveying bar 3 or from the negative electrode conveying bar 3 to the positive electrode conveying bar 2. More specifically, the flipping mechanism is used to flip the battery cell 100 from a receiving slot 5 of the positive electrode conveying bar 2 to the negative electrode conveying bar 3 or from the negative electrode conveying bar 3 to a receiving slot 5 of the positive electrode conveying bar 2. Flipping here means turning the battery cell 100 over. Figure 4 As shown, the flip mechanism includes a flip drive assembly 12, a rotating rod 13 and a chuck 14, wherein the chuck 14 is fixed on the rotating rod 13, and the rotating rod 13 is fixed to the operating table 1 through a support seat 15, and the flip drive assembly 12 drives the rotating rod 13 to rotate. The flip drive assembly 12 includes a flip cylinder 16, a connecting rod 17, a rack 18 and a gear, wherein the flip cylinder 16 is connected to the rack 18 through a connecting rod 17, the rack 18 is meshed with the gear, and the gear is coaxially fixed with the rotating rod 13. The chuck 14 includes two clamping rods, and the two clamping rods of the chuck 14 are driven to move in opposite directions or relative to each other by the chuck 14 driving assembly. For example, the two clamping rods can be driven by a cylinder or driven by a screw mechanism to realize the opposite or relative movement of the two clamping rods. The rotating rod 13 is connected to the support seat 15 through a bearing 19 for rotation.

[0030] like Figure 6 As shown, the electrode sheet feeding mechanism includes a stepper motor 7, a turntable 8 and a plurality of clamping sheets 9. The stepper motor 7 drives the turntable 8 to rotate. The clamping sheets 9 are evenly distributed on the turntable 8. One end of each clamping sheet 9 is fixed to the turntable 8. The other end of the clamping sheet 9 has a protruding clamping end 9-1. The protruding clamping end 9-1 has a spot welding groove 9-2 and a suction cup. The suction cup is located on the lower surface of the clamping sheet 9. The electrode sheet 200 is manually attached to the suction cup, and the electrode sheet 200 is fixed by the suction cup. Then, the position of the electrode sheet 200 is moved by driving the clamping sheet 9 to rotate.Figure 7 Shown is a schematic structural view of an embodiment of the clamping piece. As Figure 8 Shown is a schematic structural view of another embodiment of the clamping piece. A positioning bayonet 9-3 is further provided at the protruding clamping end 9-1 of the electrode sheet feeding mechanism. The electrode sheet 100 may have different shapes, such as a flat sheet shape or an L-shaped bent shape. For different shapes, different clamping pieces 9 can be used. For example, for a flat sheet shape, the Figure 7 shown clamping piece 9 can be used, and for an L-shaped bent shape, the Figure 8 shown clamping piece 9 can be used. One side of the L-shaped bent electrode sheet 100 is snapped into the positioning bayonet 9-3, so as to realize the positioning of the electrode sheet 100. Figure 1 、 3 The electrode sheet feeding mechanism shown in and 6 has three clamping pieces 9, and the stepping motor 7 rotates 60° each time.

[0031] As Figure 1 、 3 shown, both the positive electrode spot welding mechanism and the negative electrode spot welding mechanism include an electrode sheet feeding mechanism, a feeding mechanism, and a spot welding assembly. The feeding mechanism is fixed below the operation table 1, and the feeding mechanism of the positive electrode spot welding mechanism is located below the positive electrode conveyor strip 2, and the feeding mechanism of the negative electrode spot welding mechanism is located below the negative electrode conveyor strip 3. The feeding mechanism is used to drive the battery cell 100 to move from one receiving groove 5 to another receiving groove 5. The spot welding assembly includes a spot welding unit and a positioning unit. The spot welding unit is located above the positive electrode conveyor strip 2 or the negative electrode conveyor strip 3, and the positioning unit and the electrode sheet feeding mechanism are respectively located on both sides of the positive electrode conveyor strip 2 or the negative electrode conveyor strip 3 and are oppositely arranged.

[0032] As Figure 1-3 shown, the positioning unit includes a pushing cylinder 10 and a pushing plate 11. The cylinder body of the pushing cylinder 10 is fixed to the operation table 1. One of the two tracks has a notch 6. The pushing plate 11 is located in the notch 6 of the track with the notch 6. The protruding end of the pushing cylinder 10 is fixed to one side of the pushing plate 11, and the other side of the pushing plate 11 faces the other track, that is, the track without the notch 6, the track opposite to the track with the notch 6.

[0033] As Figure 5 shown, the spot welding unit includes a displacement driving mechanism 20 and a spot welding head 21. The displacement driving mechanism 20 is arranged on the operation table 1. The displacement driving mechanism 20 drives the spot welding head 21 to move, and the electric welding head is located directly above the positive electrode conveyor strip 2 or the negative electrode conveyor strip 3. The displacement driving mechanism 20 mainly realizes the up and down movement of the spot welding head 21 to avoid interference during the feeding of the electrode sheet 200 and the movement of the battery cell 100. For example, the up and down movement of the spot welding head 21 can be realized by driving with a cylinder.

[0034] As Figure 9As shown in the figure, the feeding mechanism includes a left - right moving unit and an up - down moving unit. The up - down moving unit includes a lower cylinder 22 and a fixing plate 23. The extending end of the lower cylinder 22 is fixed to the fixing plate 23, and the cylinder body of the lower cylinder 22 is fixed through a base other than the operating table 1; The left - right moving unit includes an upper cylinder 24, a slide rail 25 and a connecting block 26. The slide rail 25 is fixed on the fixing plate 23. The cylinder body of the upper cylinder 24 is fixed to the fixing plate 23, and the extending end of the upper cylinder 24 is fixed to the connecting block 26. A plurality of sliders 27 are provided at the bottom of the connecting block 26, and the connecting block 26 is slidably connected to the slide rail 25 through the sliders 27. A number of support rods 28 are fixed to the top of the connecting block 26. The interval between each support rod 28 is equal to the interval between each accommodation groove 5 formed by the two tracks, and the top end of each support rod 28 has an adsorption unit, such as a suction cup or a pumping adsorption mechanism, to ensure that when the support rod 28 moves, the battery cells 100 on each support rod 28 do not shift. The outer diameter of the support rod 28 matches the inner diameter of the strip - shaped sliding space 4. One end of the support rod 28 is fixed to the connecting block 26, and the other end of the support rod 28 extends into the strip - shaped sliding space 4 or the accommodation groove 5.

[0035] The feeding mechanism further includes a limiting unit. The limiting unit includes a limiting column 29 and a limiting block 30. The limiting column 29 passes through the limiting block 30 and is slidably connected to the limiting block 30. One end of the limiting column 29 is fixed to the operating table 1, and the other end of the limiting column 29 is relatively fixed to the cylinder body position of the lower cylinder 22. The limiting block 30 is fixed to the fixing plate 23.

[0036] In the present invention, the positive electrode plate or the negative electrode plate can be selected for welding according to needs. Here, taking the welding of the positive electrode plate first as an example, the left side of the flipping mechanism is the positive electrode spot - welding mechanism, and the right side is the negative electrode spot - welding mechanism. Figure 1 The operation is carried out in the order from left to right, and the working process is as follows:

[0037] 1. First, manually place the battery cell 100 into the accommodation groove 5 of the positive electrode conveyor strip 2 on the left side. Since it is a flow - type operation from left to right, generally, the battery cell 100 is placed in the left - most accommodation groove 5 here. The initial position of the support rod 28 of the left - right moving unit is located in Figure 1 the accommodation groove 5 of the positive electrode conveyor strip 2, and the battery cell 100 is adsorbed on the top of the support rod 28. There is a corresponding support rod 28 for each accommodation groove 5. In this way, a battery cell 100 support mechanism is provided in each accommodation groove 5, and the position movement of the battery cell 100 in each accommodation groove 5 can also be realized.

[0038] 2. Manually attach the positive electrode plate 200 to the suction cup part on the lower surface of the clamping piece 9, and the positive electrode plate 200 is adsorbed and fixed by the suction cup. The initial position of the clamping piece 9 is as Figure 1 shown in the electrode plate feeding mechanism on the left side.

[0039] 3. The stepping motor 7 of the driving electrode sheet feeding mechanism rotates. The electrode sheet feeding mechanism has three clamping pieces 9. Each time the stepping motor 7 rotates 60°, the turntable 8 rotates 60°, driving the clamping piece 9 to rotate 60°, and the clamping piece 9 adsorbed with the positive electrode sheet 200 is rotated above the receiving groove 5 of the positive electrode conveying bar 2.

[0040] 4. In the up-and-down moving unit of the feeding mechanism, the lower air cylinder 22 pushes the fixing plate 23 upward. Since the left-and-right moving unit is fixed on the fixing plate 23, the whole left-and-right moving unit is pushed upward together. The support rod 28 moves upward, and the battery cell 100 is pushed out of the receiving groove 5 upward. Then, the upper air cylinder 24 pushes the connecting block 26 to the right, driving the slider 27 to slide to the right in the slide rail 25. Each support rod 28 on the connecting block 26 moves to the right as the connecting block 26 moves, and the whole support rods 28 move to the right by a distance equal to the interval of one receiving groove 5 and stop. At this time, the battery cell 100 moves above the receiving groove 5 adjacent to the right of its original position. The lower air cylinder 22 pushes the fixing plate 23 downward to reset, then the whole left-and-right moving unit is pushed downward together, the support rod 28 moves downward, and the battery cell 100 falls downward into the receiving groove 5 below it. In this way, the operation of moving the battery cell 100 from one receiving groove 5 to another is realized. At this time, the clamping piece 9 adsorbed with the positive electrode sheet 200 is located above the battery cell 100, and the pushing air cylinder 10 and the push plate 11 of the positioning unit are also located here. That is, the positions of the notch 6 of the track, the spot welding head 21, and the clamping piece 9 correspond to each other, so that when welding, the push plate 11 holds the battery cell 100, and the suction cup of the clamping piece 9 and the spot welding head 21 are both located above the battery cell 100.

[0041] 5. The pushing air cylinder 10 of the positioning unit pushes the push plate 11 to hold the battery cell 100. On the one hand, the push plate 11 and the groove on the other track realize the positioning of the battery cell 100 at the notch 6. On the other hand, it realizes the fixation of the battery cell 100 to prevent the battery cell 100 from moving during welding.

[0042] 6. The initial position of the spot welding head 21 is above the conveying mechanism to avoid interference during the feeding of the electrode sheet 200 and the movement of the battery cell 100. The displacement driving mechanism 20 drives the spot welding head 21 to move downward, and the spot welding head 21 just extends into the spot welding groove 9-2 of the clamping piece 9 to weld the positive electrode sheet 200 and the battery cell 100.

[0043] 7. Subsequently, repeat the rightward feeding action of the feeding mechanism of the positive electrode spot welding mechanism on the left in step 4 to convey the battery cell 100 welded with the positive electrode sheet 200 to the right.

[0044] 8. The two clamping rods of the clamp 14 are initially in an open state, and the clamp 14 is located above the rightmost receiving groove 5 of the positive electrode conveying strip 2. When the battery cell 100 welded with the positive electrode sheet 200 is conveyed to the right to the position of the clamp 14 of the flip mechanism, the lower cylinder 22 of the feeding mechanism pushes the fixed plate 23 upward to push the battery cell 100 welded with the positive electrode sheet 200 upward out of the receiving groove 5, and then the driving assembly drives the two clamping rods of the clamp 14 to move relative to each other, thereby clamping the battery cell 100. The flip cylinder 16 of the flip driving assembly 12 pushes the rack 18 to move, and the rack 18 drives the gear to rotate, thereby rotating the rotating rod 13. The direction and distance of the push of the flip cylinder 16 are set to make the clamp 14 flip 180° to the right to the leftmost receiving groove 5 above the negative electrode conveying strip 3 on the right.

[0045] 9. Then, the feeding mechanism of the negative spot welding mechanism on the right side operates the feeding action to the right as in step 4, so that the battery cell 100 welded with the positive electrode sheet 200 is conveyed to the right into the receiving groove 5 below the right spot welding head 21, and the negative electrode sheet 200 is manually attached to the suction cup portion of the lower surface of the clamping sheet 9 of the negative spot welding mechanism, and the positive electrode sheet 200 is fixed by the suction cup, and the initial position of the clamping sheet 9 is the same as that of the positive electrode sheet 200. Figure 1 The electrode sheet feeding mechanism of the positive electrode sheet on the left is in the same position state.

[0046] 10. Drive the stepper motor 7 of the electrode sheet feeding mechanism on the right side to rotate. When the stepper motor 7 rotates 60°, the turntable 8 rotates 60°, driving the clamping sheet 9 to rotate 60°, and the clamping sheet 9 with the negative electrode sheet 200 adsorbed thereon is transferred to the top of the receiving groove 5 of the negative electrode conveying strip 3, that is, Figure 1 The electrode sheet feeding mechanism on the right side shows the position status.

[0047] 12. The displacement driving mechanism 20 of the negative spot welding mechanism on the right side drives the spot welding head 21 to move downward, and the spot welding head 21 just extends into the spot welding groove 9 - 2 of the clamping sheet 9 to weld the positive electrode sheet 200 and the battery cell 100 .

[0048] 13. Then the feeding mechanism of the negative spot welding mechanism on the right side repeats the rightward feeding action as in step 4, and transmits the battery cell 100 welded with the negative electrode sheet 200 to the right, and then is taken out manually or sent to the next process. At this point, the positive and negative electrode sheets 200 on both sides of the battery cell 100 have been welded.

[0049] A battery packaging and assembling device of the present invention can weld positive and negative electrode plates 200 on the front and back sides of a battery cell 100. After welding a positive or negative electrode plate 200 on one side of the battery cell 100, the battery cell 100 can be turned over to weld the negative or positive electrode plate. Moreover, during the process of moving the battery cell 100 and turning it over, the battery cell 100 can be positioned in the receiving groove 5 to ensure the accuracy of the welding positions of the electrode plates on the front and back sides, thereby ensuring the reliability of the electrode plate welding.

[0050] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can make various changes and modifications completely within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A battery pack assembly device, characterized in that: It comprises an operating table (1), a conveying mechanism, a positive spot welding mechanism, a flipping mechanism and a negative spot welding mechanism, wherein the positive spot welding mechanism and the negative spot welding mechanism are respectively located on both sides of the flipping mechanism, and the flipping mechanism and the conveying mechanism are both located on the operating table (1); The conveying mechanism comprises a positive electrode conveying bar (2) and a negative electrode conveying bar (3), the flipping mechanism is located between the positive electrode conveying bar (2) and the negative electrode conveying bar (3), the positive electrode conveying bar (2) and the negative electrode conveying bar (3) each comprise two tracks arranged opposite to each other, and a plurality of grooves are provided on opposite surfaces of the tracks, the two tracks arranged opposite to each other are spaced apart so that a strip-shaped sliding space (4) is provided between the two tracks, and the grooves of the two tracks are arranged opposite to each other to form a receiving groove (5) matching the outer diameter of the battery cell (100); The flipping mechanism is used to flip the battery cell (100) from the positive electrode transmission bar (2) to the negative electrode transmission bar (3) or from the negative electrode transmission bar (3) to the positive electrode transmission bar (2); The positive spot welding mechanism and the negative spot welding mechanism both comprise an electrode sheet loading mechanism, a feeding mechanism and a spot welding assembly. The feeding mechanism is fixed below the operating table (1), and the feeding mechanism of the positive spot welding mechanism is located below the positive electrode conveying bar (2), and the feeding mechanism of the negative spot welding mechanism is located below the negative electrode conveying bar (3). The feeding mechanism is used to drive the battery cell (100) to move from one receiving slot (5) to another receiving slot (5). The spot welding assembly comprises a spot welding unit and a positioning unit. The spot welding unit is located above the positive electrode conveying bar (2) or the negative electrode conveying bar (3). The positioning unit and the electrode sheet loading mechanism are respectively located on both sides of the positive electrode conveying bar (2) or the negative electrode conveying bar (3) and are arranged opposite to each other.

2. The battery pack assembly device according to claim 1, characterized in that: The flipping mechanism comprises a flipping drive assembly (12), a rotating rod (13) and a clamp (14); the clamp (14) is fixed on the rotating rod (13); the rotating rod (13) is fixed to the operating table (1) via a support seat (15); the flipping drive assembly (12) drives the rotating rod (13) to rotate; the electrode sheet feeding mechanism comprises a stepping motor (7), a rotating disk (8) and a plurality of clamping sheets (9); the stepping motor (7) drives the rotating disk (8) to rotate; the clamping sheets (9) are evenly distributed on the rotating disk (8); one end of each clamping sheet (9) is fixed to the rotating disk (8); the other end of the clamping sheet (9) has a protruding clamping end (9-1); the protruding clamping end (9-1) has a spot welding groove (9-2) and a suction cup; the suction cup is located on the lower surface of the clamping sheet (9).

3. The battery pack assembly device according to claim 1, characterized in that: The extended clamping end (9-1) of the electrode sheet feeding mechanism is also provided with a positioning bayonet (9-3).

4. The battery pack assembly device according to claim 1, characterized in that: The flip driving assembly (12) comprises a flip cylinder (16), a connecting rod (17), a rack (18) and a gear; the flip cylinder (16) is transmission-connected to the rack (18) via the connecting rod (17); the rack (18) is meshed with the gear; and the gear is coaxially fixed to the rotating rod (13).

5. The battery pack assembly device according to claim 1, characterized in that: The spot welding unit comprises a displacement drive mechanism (20) and a spot welding head (21), wherein the displacement drive mechanism (20) is arranged on an operating table (1), and the displacement drive mechanism (20) drives the spot welding head (21) to move, wherein the electric welding head is located directly above the positive electrode conveying bar (2) or the negative electrode conveying bar (3), and the positioning unit comprises a pushing cylinder (10) and a push plate (11), wherein the cylinder body of the pushing cylinder (10) is fixed to the operating table (1), wherein one of the two tracks has a notch (6), wherein the push plate (11) is located in the notch (6) of the track having the notch (6), wherein the protruding end of the pushing cylinder (10) is fixed to one side of the push plate (11), and the other side of the push plate (11) faces the other track.

6. The battery pack assembly device according to claim 1, characterized in that: The feeding mechanism comprises a left-right moving unit and an up-down moving unit, wherein the up-down moving unit comprises a lower cylinder (22) and a fixed plate (23), wherein the protruding end of the lower cylinder (22) is fixed to the fixed plate (23); the left-right moving unit comprises an upper cylinder (24), a slide rail (25) and a connecting block (26), wherein the slide rail (25) is fixed to the fixed plate (23), the cylinder body of the upper cylinder (24) is fixed to the fixed plate (23), the protruding end of the upper cylinder (24) is fixed to the connecting block (26), and the bottom of the connecting block (26) is provided with a plurality of sliding blocks ( 27), the connecting block (26) is slidably connected to the slide rail (25) through a slider (27), a plurality of support rods (28) are fixed on the top of the connecting block (26), the interval between each support rod (28) is equal to the interval between each receiving groove (5) formed by the two tracks, and the top of each support rod (28) has an adsorption unit, the outer diameter of the support rod (28) matches the inner diameter of the strip sliding space (4), one end of the support rod (28) is fixed to the connecting block (26), and the other end of the support rod (28) extends into the strip sliding space (4) or the receiving groove (5).

7. The battery pack assembly device according to claim 1, characterized in that: The feeding mechanism further comprises a limiting unit, the limiting unit comprising a limiting column (29) and a limiting block (30), the limiting column (29) is inserted into the limiting block (30) and is slidably connected to the limiting block (30), one end of the limiting column (29) is fixed to the operating table (1), the other end of the limiting column (29) is relatively fixed to the cylinder body position of the lower cylinder (22), and the limiting block (30) is fixed to the fixing plate (23).

8. The battery pack assembly device according to claim 1, characterized in that: The chuck (14) comprises two clamping rods, and the two clamping rods of the chuck (14) are driven to move in opposite directions or relative to each other by a chuck (14) driving assembly.

9. The battery pack assembly device according to claim 1, characterized in that: The rotating rod (13) and the supporting seat (15) are rotatably connected via a bearing (19).

10. The battery pack assembly device according to claim 1, characterized in that: The groove is an arc groove, and the accommodating groove (5) is a circular groove.

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