A multi-point welding device for lithium battery production

Abstract

The present invention relates to the field of lithium battery production technology, and specifically discloses a multi-point welding device for lithium battery production and preparation, comprising a base plate and a vertical plate, wherein the vertical plate is mounted on the top of the base plate, a movable seat is mounted on the top of the base plate, a limiting mechanism is arranged inside the movable seat, the limiting mechanism comprises a rotating frame, two placement plates are rotatably mounted on both ends of the rotating frame, a clamping plate is arranged on the side away from each other of the two placement plates, a first cleaning mechanism is arranged on one side of the two clamping plates, a second cleaning mechanism is arranged on one side of the vertical plate, and a welding mechanism is arranged on the other two sides of the vertical plate. In the invention, after a plurality of lithium batteries and iron sheets are placed inside the limiting mechanism, the first cleaning mechanism can automatically clean the plurality of lithium batteries and iron sheets, avoiding the presence of impurities in the contact area between the lithium batteries and the iron sheets, which affects the quality of subsequent welding, and can also indirectly improve the production quality of lithium battery packs, facilitating the preparation of qualified lithium battery packs.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to a multi-point welding device used in the production and preparation of lithium batteries. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. With the development of science and technology, lithium batteries have become mainstream. A lithium battery pack is composed of multiple lithium battery cells connected in a certain circuit method. These cells can be prismatic, cylindrical, or soft polymer batteries, and can be connected in series or parallel as needed to adjust the voltage and current output. Lithium battery packs are characterized by high efficiency, safety, and reliability, and are widely used in mobile power supplies, energy storage devices, electric vehicles, and other fields. During the production of lithium battery packs, relevant welding equipment is required to firmly connect the positive and negative electrodes of multiple lithium batteries to ensure that the battery pack has a long-lasting and reliable power output capability.

[0003] When welding multiple lithium batteries and iron sheets, the welding device in the prior art can use an automated welding device to control the welding head to automatically weld the lithium batteries and iron sheets, which can greatly improve the production efficiency of the lithium battery pack. However, after the lithium batteries and iron sheets are placed in the relevant fixed mold manually or with the help of a related loading robot, if impurities are attached to the positive and negative electrodes of the lithium batteries or the surfaces of the iron sheets, and these impurities are not convenient to be cleaned and removed, the subsequent welding quality between the lithium batteries and the iron sheets will be affected, which is not conducive to the production and preparation of the lithium battery pack, and reduces the production quality of the lithium battery pack, making the welding device in the prior art unable to meet people's usage needs. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a multi-point welding device for the production and preparation of lithium batteries.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-point welding device for lithium battery production and preparation comprises a base plate and a vertical plate, wherein the vertical plate is mounted on the top of the base plate, a movable seat is slidably mounted on the top of the base plate, a limiting mechanism for limiting and fixing multiple lithium batteries to be welded is provided inside the movable seat, the limiting mechanism comprises a rotating frame rotatably mounted inside the movable seat, two placement plates are rotatably mounted at both ends of the rotating frame, a clamping plate is provided on the side away from each other of the two placement plates, a first cleaning mechanism for cleaning the two ends of the multiple lithium batteries and one side of the iron sheet is provided on the side of the two clamping plates close to the placement plate, a second cleaning mechanism for cleaning the other side of the iron sheet after welding is provided on the side of the vertical plate close to the movable seat, and welding mechanisms for spot welding the lithium batteries and the iron sheet are provided on the other two sides of the vertical plate.

[0007] Optionally, a first slide groove is opened on the top of the base plate, a first slider is installed inside the first slide groove, the top of the first slider is connected to the moving seat, a driving motor is installed on one side outer wall of the moving seat, and the output end of the driving motor is connected to the rotating part of one end of the rotating frame.

[0008] Optionally, multiple first through slots are provided inside the two placement plates, and limiting plates are installed on the inner walls on both sides of the multiple first through slots inside one of the placement plates, and an arc plate is installed above the limiting plate of the multiple first through slots inside one of the placement plates.

[0009] Optionally, two second sliding grooves are provided on the inner walls on both sides of the two placement plates, and second sliders are installed inside the two second sliding grooves. The outer walls on both sides of the two splints are connected to the second sliders adjacent to them. Second through grooves corresponding to the positions of multiple first through grooves are provided inside the two splints, and the width of the second through grooves is smaller than that of the first through grooves. Multiple groups of rubber strips are installed on the outer walls of the two splints on one side close to the placement plates, and the multiple groups of rubber strips are respectively located on both sides of the multiple second through grooves.

[0010] Optionally, the first cleaning mechanism includes a fixed block installed on the outer wall of the two clamping plates close to the placement plate, a third sliding groove is opened on the outer wall of one side of the two fixed blocks, a third slider is installed inside the two third sliding grooves, and a rotating block is rotatably installed on the end of the two third sliders away from the third sliding groove.

[0011] Optionally, the two rotating blocks are rotatably mounted with a first rotating rod at one end away from the third slider, the outer walls on both sides of the two first rotating rods are mounted with a first cleaning pad, the outer walls on the other two sides of the two first rotating rods are mounted with multiple industrial cameras, and the interior of the two placement plates is provided with a third through groove for the fixed block and the first rotating rod to pass through.

[0012] Optionally, the second cleaning mechanism includes a fourth slide groove opened on the outer wall of one side of the vertical plate close to the movable seat, a fourth slider is installed inside the fourth slide groove, a rotating plate is rotatably installed on the end of the fourth slider away from the fourth slide groove, a first groove is opened on the outer wall of the rotating plate away from the fourth slider, a first double-headed screw is rotatably installed inside the first groove, and two first moving blocks are threadedly installed on the outer wall of the first double-headed screw.

[0013] Optionally, the two first movable blocks are rotatably mounted on one end away from the first double-headed screw, the two second rotating rods are provided with a second groove at the bottom end, the second double-headed screws are rotatably mounted inside the two second grooves, the outer walls of the two second double-headed screws are threaded with two second movable blocks, the two second movable blocks are installed with a vacuum suction cup at one end away from the second double-headed screw, and the tops of the two second rotating rods are installed with a second cleaning pad.

[0014] Optionally, the welding mechanism includes a fifth chute opened on the other two outer walls of the vertical plate, a fifth slider is installed inside the two fifth chute, and a first moving rod is installed at one end of the two fifth sliders away from the fifth chute.

[0015] Optionally, a first sliding groove is provided on the outer wall of the two first moving rods close to the moving seat, a first sliding block is installed inside the two first sliding grooves, a second moving rod is installed on the end of the two first sliding blocks away from the first sliding groove, a second sliding groove is provided inside the two second moving rods, a second sliding block is slidably installed inside the two second sliding grooves, and two spot welding heads are installed inside the two second sliding blocks.

[0016] The beneficial effects of the present invention are:

[0017] 1. In this invention, after placing multiple lithium batteries and iron sheets inside the limiting mechanism, the first cleaning mechanism provided on the two clamping plates can be used to automatically clean the connection parts of the multiple lithium batteries and the iron sheets, thereby avoiding the presence of impurities in the contact parts between the lithium batteries and the iron sheets, which may affect the subsequent welding quality. This can also indirectly improve the production quality of the lithium battery pack and facilitate the preparation of qualified lithium battery packs.

[0018] 2. In this invention, by arranging industrial cameras on both sides of the first rotating rod, multiple lithium battery positive electrodes and multiple iron sheets can be comprehensively identified and inspected before welding the multiple lithium batteries and iron sheets, and whether there are defects on the surface of the lithium battery positive electrodes and the iron sheets. If there are defects on the side close to the positive electrodes of some lithium batteries and the iron sheets, the industrial camera can transmit the detection data to an external preset display screen, and the staff can remove and replace the defective lithium batteries and iron sheets to avoid affecting the subsequent welding work of the lithium batteries and iron sheets.

[0019] 3. In this invention, after the two welding mechanisms complete the welding process of the lithium battery pack, the second cleaning mechanism provided on one side of the vertical plate can automatically clean the iron sheets on both sides of the welded lithium battery pack, thereby improving the cleanliness of the surface of the iron sheets after welding, which is beneficial for the subsequent further processing of the lithium battery pack.

[0020] 4. In this invention, after the two second cleaning pads clean the outer walls of the iron sheets on both sides of the lithium battery pack, with the help of the cooperation between the two vacuum suction cups and other related components, the two groups of vacuum suction cups can be driven to pull the iron sheets on both sides of the lithium battery pack, thereby being able to test the strength between the welded iron sheets and the lithium battery. The staff can also adjust the welding parameters related to the spot welding head according to the test results, so that the quality of the spot welding head for subsequent lithium battery welding processing is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of a multi-point welding device for lithium battery production and preparation proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the limiting mechanism of the present invention when in use;

[0024] Figure 3 This is a schematic diagram of the structure in which both placement plates are rotated to a horizontal state in the present invention;

[0025] Figure 4 This is a schematic diagram of the structure in which two placement plates are separated from the rotating frame in the present invention;

[0026] Figure 5 A cross-sectional view of the structure of one of the placement plates in the present invention;

[0027] Figure 6 This is a schematic structural diagram of one of the splints in the present invention;

[0028] Figure 7 This is a schematic structural diagram of the present invention after one of the rotating blocks drives the first rotating rod to rotate;

[0029] Figure 8 A schematic structural diagram of a third sliding block and a first rotating rod in the present invention;

[0030] Figure 9 Schematic diagram of the structure of the second cleaning mechanism in the present invention;

[0031] Figure 10 A cross-sectional view of the structure of one of the second rotating rods in the present invention;

[0032] Figure 11 It is a structural schematic diagram of one of the welding mechanisms in the present invention;

[0033] Figure 12 It is a structural schematic diagram of one of the second sliding blocks and two spot welding heads in the present invention.

[0034] In the figure: 1, bottom plate; 2, vertical plate; 3, first slide; 4, moving seat; 5, rotating frame; 6, placing plate; 7, clamping plate; 8, fourth slide; 9, fifth slide; 10, rotating plate; 11, second rotating rod; 12, first moving rod; 13, second moving rod; 14, first slider; 15, driving motor; 16, first through-slot; 17, curved plate; 18, third through-slot; 19, second slide; 20, second slider; 21, second through-slot; 22, rubber strip; 23, fixed Fixed block; 24, third slide groove; 25, first rotating rod; 26, third slider; 27, rotating block; 28, first cleaning pad; 29, industrial camera; 30, fourth slider; 31, first moving block; 32, vacuum suction cup; 33, first double-headed screw; 34, second cleaning pad; 35, second double-headed screw; 36, second moving block; 37, fifth slider; 38, first sliding groove; 39, spot welding head; 40, first sliding block; 41, second sliding block; 42, second sliding groove. DETAILED DESCRIPTION

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] Reference Figures 1-12A multi-point welding device for lithium battery production and preparation includes a base plate 1 and a vertical plate 2. The vertical plate 2 is mounted on the top of the base plate 1. A movable seat 4 is slidably mounted on the top of the base plate 1. The movable seat 4 is provided with a limiting mechanism for limiting the position of multiple lithium batteries to be welded. The limiting mechanism includes a rotating frame 5 rotatably mounted inside the movable seat 4. Two placement plates 6 are rotatably mounted on both ends of the rotating frame 5. The two placement plates 6 are each provided with a clamping plate 7 on the side away from each other. The two clamping plates 7 are each provided with a first cleaning mechanism on the side close to the placement plates 6 for cleaning the ends of the multiple lithium batteries and one side of the iron sheet. The side of the vertical plate 2 close to the movable seat 4 is provided with a second cleaning mechanism for cleaning the other side of the iron sheet after welding. The other two sides of the vertical plate 2 are provided with a welding mechanism for spot welding the lithium batteries and the iron sheet. Two first drive devices are preset on the outer wall of one side of the rotating frame 5. The output ends of the two first drive devices are respectively connected to the rotating parts of one end of the two placement plates 6, thereby driving the two placement plates 6 to rotate and adjust at both ends of the rotating frame 5.

[0037] As a technical optimization solution of the present invention, a first chute 3 is provided at the top of the base plate 1. A first slider 14 is installed inside the first chute 3. The top of the first slider 14 is connected to the movable seat 4. A drive motor 15 is installed on one outer wall of the movable seat 4. The output end of the drive motor 15 is connected to the rotating portion of one end of the rotating frame 5. A first linear motor is preset inside the first chute 3. The first linear motor can drive the first slider 14 to move back and forth and adjust within the first chute 3, thereby driving the movable seat 4 and other components to move and adjust together. The rotating frame 5 can rotate and adjust synchronously within the movable seat 4 by rotating the output end of the drive motor 15, thereby driving the rotating frame 5 and the placement plates 6 provided at both ends to rotate and adjust synchronously.

[0038] As a technical optimization solution of the present invention, multiple first through slots 16 are provided inside the two placement plates 6, and the inner walls of the multiple first through slots 16 inside one of the placement plates 6 are both installed with limit plates, and the multiple first through slots 16 inside one of the placement plates 6 are both installed with arc plates 17 above the limit plates. Figure 5 As shown, by arranging two limiting plates inside the multiple first through grooves 16 inside one of the placement plates 6, when the positive electrode of the lithium battery is placed on top of the two limiting plates, the raised portion of the positive electrode of the lithium battery can pass downward from the gap between the two limiting plates, and when the lithium battery is placed inside the first through groove 16, it can be limited by the two arc-shaped plates 17, which is convenient for subsequent welding, and can also leave gaps between the multiple lithium batteries to avoid the problem that the multiple lithium batteries are too close to each other after welding, which affects the subsequent use of the lithium battery pack.

[0039] As a technical optimization solution of the present invention, two second sliding grooves 19 are provided on the inner walls on both sides of the two placement plates 6, and second sliders 20 are installed inside the two second sliding grooves 19. The outer walls on both sides of the two splints 7 are connected to the second sliders 20 close to them. The interiors of the two splints 7 are provided with second through grooves 21 corresponding to the positions of multiple first through grooves 16, and the width of the second through grooves 21 is smaller than the first through grooves 16. Multiple groups of rubber strips 22 are installed on the outer walls of the two splints 7 on one side close to the placement plate 6, and the multiple groups of rubber strips 22 are respectively located on both sides of the multiple second through grooves 21. A second linear motor is preset inside the two second slides 19, and the two second linear motors can drive the two second sliders 20 to move up and down and adjust inside the corresponding second slides 19, and drive the corresponding clamping plates 7 to move and adjust inside the placement plate 6; the multiple second through slots 21 opened inside the two clamping plates 7 can facilitate the subsequent spot welding head 39 to pass through the inside of the second through slots 21 to weld the iron sheet and the lithium battery end placed between the two rubber strips 22; the length of the iron sheet used for welding with the two ends of multiple lithium batteries will be slightly shorter than the length of the first through slot 16, and the width of the iron sheet will be slightly shorter than the gap between the two limit plates, so that after the lithium battery is welded to the iron sheet, the iron sheet can pass between the two limit plates and the inside of the first through slot 16, which is convenient for welding after welding The lithium battery and the iron sheet are taken out; and the width of the iron sheet is greater than the width of the second through groove 21, so that when the iron sheet is placed between the two rubber strips 22, it will not fall out of the inside of the second through groove 21, and the elasticity of the two rubber strips 22 can be used to squeeze and limit the two ends of the iron sheet to prevent the iron sheet from falling off between the two rubber strips 22; and the thickness of the iron sheet is slightly greater than the height of the rubber strips 22, so that the subsequent first cleaning mechanism can clean the side of the iron sheet close to the lithium battery; the thickness of the parts of the iron sheet that do not abut the lithium battery at both ends is thinner, so that the two thinner iron sheets placed horizontally can be stacked with the ends of multiple iron sheets placed vertically and placed in the notches at both ends of multiple groups of rubber strips 22, so that the subsequent two thinner iron sheets can be welded with the other multiple iron sheets welded to the lithium battery.

[0040] As a technical optimization solution of the present invention, the first cleaning mechanism includes a fixed block 23 installed on the outer wall of the two clamping plates 7 near the placement plate 6. A third sliding groove 24 is provided on the outer wall of each of the two fixed blocks 23. A third slider 26 is installed inside the two third sliding grooves 24. A rotating block 27 is rotatably installed on one end of the two third sliders 26 away from the third sliding grooves 24. A third linear motor is preset inside the two third sliding grooves 24. The two third linear motors can drive the two third sliders 26 to move back and forth inside the corresponding third sliding grooves 24, and drive the rotating block 27 to move together; a second driving device is preset on the outer wall of each of the two third sliders 26. The output ends of the two second driving devices are respectively connected to the rotating parts of one end of the two rotating blocks 27, thereby driving the two rotating blocks 27 to rotate and adjust inside the corresponding third sliders 26.

[0041] As a technical optimization solution of the present invention, the ends of the two rotating blocks 27 away from the third slider 26 are each rotatably mounted with a first rotating rod 25. A first cleaning pad 28 is mounted on one of the outer walls of each of the first rotating rods 25. Multiple industrial cameras 29 are mounted on the other outer walls of each of the two first rotating rods 25. The interiors of the two placement plates 6 are each provided with a third through-slot 18 for the fixed block 23 and the first rotating rod 25 to pass through. A third drive device is pre-installed within each rotating block 27. The output ends of the two third drive devices are respectively connected to the rotating parts of the two first rotating rods 25, thereby driving the two first rotating rods 25 for rotational adjustment. The multiple industrial cameras 29 are all XT9202B industrial cameras in the prior art.

[0042] As a technical optimization solution of the present invention, the second cleaning mechanism includes a fourth slide groove 8 opened on the outer wall of one side of the vertical plate 2 close to the movable seat 4, and a fourth slider 30 is installed inside the fourth slide groove 8. A rotating plate 10 is rotatably installed on the end of the fourth slider 30 away from the fourth slide groove 8, and a first groove is opened on the outer wall of the rotating plate 10 away from the fourth slider 30. A first double-headed screw 33 is rotatably installed inside the first groove, and two first moving blocks 31 are threadedly installed on the outer wall of the first double-headed screw 33. A fourth linear motor is preset inside the fourth slide 8, and the fourth linear motor can drive the fourth slider 30 to move up and down inside the fourth slide 8; a fourth driving device is preset inside the fourth slider 30, and the output end of the fourth driving device is connected to the rotating part of the rotating plate 10, thereby driving the rotating plate 10 to rotate and adjust; and a first servo motor is preset on the outer wall of one side of the rotating plate 10, and the output end of the first servo motor is connected to one end of the first double-headed screw 33, thereby driving the first double-headed screw 33 to rotate inside the first groove, thereby driving the two first moving blocks 31 to move and adjust in the direction of approaching or moving away from each other.

[0043] As a technical optimization solution of the present invention, the two first movable blocks 31 are rotatably installed with the second rotating rod 11 at one end away from the first double-headed screw 33, the bottom ends of the two second rotating rods 11 are provided with a second groove, the insides of the two second grooves are rotatably installed with the second double-headed screws 35, the outer walls of the two second double-headed screws 35 are threadedly installed with two second movable blocks 36, the ends of the two second movable blocks 36 away from the second double-headed screw 35 are installed with a vacuum suction cup 32, and the tops of the two second rotating rods 11 are installed with a second cleaning pad 34. A second servo motor is preset inside the two first moving blocks 31, and the output ends of the two second servo motors are respectively connected to the rotating parts of the second rotating rod 11 close to them, so as to drive the two second rotating rods 11 to rotate and adjust; and a third servo motor is preset inside the two second rotating rods 11, and the output ends of the two third servo motors are respectively connected to one end of the corresponding second double-headed screw 35, so as to drive the two double second-headed screws 35 to rotate inside the corresponding second grooves, and drive the two second moving blocks 36 and the vacuum suction cups 32 to move and adjust in the direction of approaching or moving away from each other; the two vacuum suction cups 32 are connected to the external preset vacuum equipment through a hose, so that the two vacuum suction cups 32 are in a vacuum state when in use, which is convenient for adsorbing and fixing the iron sheet with a smooth surface.

[0044] As a technical optimization solution of the present invention, the welding mechanism includes a fifth chute 9 defined on the other two outer walls of the riser 2. Fifth sliders 37 are mounted within each of the five chute 9, and first movable rods 12 are mounted on the ends of the two fifth sliders 37 away from the five chute 9. Fifth linear motors are pre-installed within each of the five chute 9 to drive the two fifth sliders 37 to move up and down within the corresponding five chute 9, thereby driving the two first movable rods 12 to move up and down on both sides of the riser 2.

[0045] As a technical optimization solution of the present invention, the outer walls of the two first moving rods 12 on one side close to the moving seat 4 are each provided with a first sliding groove 38, the interior of the two first sliding grooves 38 is each installed with a first sliding block 40, the two first sliding blocks 40 are each installed with a second moving rod 13 on one end away from the first sliding groove 38, the interior of the two second moving rods 13 is provided with a second sliding groove 42, the interior of the two second sliding grooves 42 is each slidably installed with a second sliding block 41, and the interior of the two second sliding blocks 41 is each installed with two spot welding heads 39. A first driving screw is preset inside the two first sliding grooves 38, one end of the first driving screw is connected to the preset first driving device, and the first sliding block 40 is threadedly connected to the outer wall of the first driving screw, so that the first driving screw can drive the first sliding block 40 to move back and forth and adjust inside the first sliding groove 38, and drive the second moving rod 13 to move and adjust; and a second driving screw is preset inside the two second sliding grooves 42, one end of the second driving screw is connected to the preset second driving device, and the second sliding block 41 is threadedly connected to the outer wall of the second driving screw, so that the second driving screw can drive the second sliding block 41 and the two spot welding heads 39 to move back and forth and adjust inside the second moving rod 13.

[0046] In the present invention, when the user uses the device, Figure 2 、 Figure 4 and Figure 5 As shown, the multiple lithium battery positive electrodes to be welded can be placed in sequence inside the multiple first through grooves 16 inside the left end placement plate 6, and ensure that the multiple lithium battery positive electrodes are respectively located between the corresponding two arc plates 17, so that the raised parts of the multiple lithium battery positive electrodes are located below the placement plate 6 after passing through the gap between the two limiting plates, and then the multiple iron sheets are placed in sequence between the two rubber strips 22 on the side of the two clamping plates 7 close to the placement plate 6. At this time, the rotating block 27 on the top of the left end clamping plate 7 can be controlled to drive the first rotating rod 25 to rotate inside one of the third sliders 26. Figure 7 In the state shown, with the help of multiple industrial cameras 29 arranged on the upper and lower sides of the first rotating rod 25, the multiple lithium battery positive electrodes and multiple iron sheets inside the multiple first through grooves 16 and the second through grooves 21 are respectively identified and detected, and the third slider 26 is controlled to move toward the other end inside the third slide groove 24, driving the multiple industrial cameras 29 on the upper and lower sides of the first rotating rod 25 to comprehensively identify and detect the multiple lithium battery positive electrodes and multiple iron sheets, and detect whether there are defects on the surfaces of the lithium battery positive electrodes and the iron sheets. For example, if there are defects on the side close to the lithium battery positive electrodes and the iron sheets, the industrial camera 29 can transmit the detection data to an external preset display screen, and the staff can take out and replace the defective lithium batteries and iron sheets to avoid affecting the subsequent lithium battery and iron sheet welding work.

[0047] After inspecting the multiple lithium batteries and iron sheets to be welded, the first rotating rod 25 is controlled to rotate 90 degrees, so that the first cleaning pads 28 set on both sides of the first rotating rod 25 rotate to abut against the positive electrodes of the multiple lithium batteries and the iron sheets. At this time, as the third slider 26 moves back and forth inside the third slide groove 24, the first cleaning pads 28 on the upper and lower sides of the first rotating rod 25 can be driven to clean the positive electrodes of the multiple lithium batteries and the iron sheets, avoiding the presence of impurities in the contact area between the lithium batteries and the iron sheets, which may affect the subsequent welding quality.

[0048] After cleaning the side where the positive electrode of the lithium battery and the multiple iron sheets are close to each other, the staff can then place the other two thinner iron sheets whose surfaces have been cleaned horizontally in the gaps opened at both ends of the multiple groups of rubber strips 22, and then control the placement plate 6 at the right end to drive the other clamping plate 7 to rotate toward the direction close to the left end placement plate 6 to a horizontal state. Since the width of the multiple first through grooves 16 is greater than the diameter of the lithium batteries to be welded, the multiple lithium battery negative electrodes placed on the top of the left end placement plate 6 can pass through the multiple first through grooves 16 inside the other placement plate 6 rotated to a horizontal state, and then the other multiple iron sheets can be placed in turn between the multiple groups of rubber strips 22 on the side of the other clamping plate 7 close to the placement plate 6, and repeat the above-mentioned steps of detecting and cleaning the positive electrode of the lithium battery and the multiple iron sheets by one of the first cleaning mechanisms, so that the other A cleaning mechanism can detect and clean the negative electrodes of multiple lithium batteries and multiple other iron sheets, and then place the other two thinner iron sheets in the gaps opened at both ends of the other multiple rubber strips 22. Since the two placement plates 6 are close to the gaps at both ends of the multiple rubber strips 22 and are provided with raised parts, the multiple second sliders 20 move in the direction close to the placement plate 6 inside the corresponding second slide groove 19, driving the two clamping plates 7 to move in the direction close to the corresponding placement plate 6, so that the iron sheets placed in the multiple second through grooves 21 inside the two clamping plates 7 can respectively tightly abut against the positive and negative electrodes of the multiple lithium batteries, and can drive the two thinner iron sheets to tightly abut against the raised parts of the placement plate 6, which is convenient for subsequent tight welding between the multiple iron sheets and the multiple lithium batteries, thereby improving the welding stability and quality of the subsequent multiple lithium batteries and iron sheets.

[0049] After the two clamping plates 7 of the limiting mechanism are used to limit and fix the multiple lithium batteries and iron sheets to be welded, the rotating frame 5 can be controlled to rotate 90 degrees upward inside the movable seat 4, and the two placement plates 6 and the clamping plates 7 can be driven to rotate upward together to a vertical state, and then the first slider 14 can be controlled to move inside the first chute 3 toward the direction close to the vertical plate 2 to the position as shown in FIG. Figure 1In the state shown, the two second rotating rods 11 located above the two placement plates 6 can be rotated 90 degrees and then moved downward inside the fourth slide groove 8 with the help of the fourth slider 30, driving the two second rotating rods 11 after rotation adjustment and the top end of the two placement plates 6 to press and limit, ensuring the stability of the two placement plates 6 and the clamping plate 7 after rotating upward, and then the fifth sliders 37 of the two welding mechanisms can be moved up and down inside the fifth slide groove 9, the first sliding block 40 can be moved and adjusted inside the first sliding groove 38, and the second sliding block 41 can be moved and adjusted inside the second sliding groove 42, so as to drive the two spot welding heads 39 to perform multi-point welding at both ends of multiple lithium batteries simultaneously, thereby improving the welding efficiency of the two ends of multiple lithium batteries and iron sheets.

[0050] After the two welding mechanisms have completed welding of the multiple lithium batteries and the multiple iron sheets, the multiple lithium batteries and the iron sheets are now located between the two placement plates 6 to form a complete lithium battery pack. At this time, the multiple second sliders 20 can be controlled to move the two clamping plates 7 in the corresponding second slide grooves 19 to reset in the direction away from the placement plates 6, so that the two clamping plates 7 release the clamping of the two ends of the welded lithium battery pack. Then, the two placement plates 6 can be slowly controlled to rotate downward in the direction away from each other, so that the lithium battery pack slowly slides down and is placed on the top of the rotating frame 5. Since the two placement plates 6 are in an inclined state after being rotated downward, there is a large gap between the top of the two placement plates 6 and the lithium battery pack. The two second rotating rods 11 can be controlled to rotate and adjust, driving the side of the two second rotating rods 11 with the second cleaning pad 34 to rotate to a close position, and then the first double-headed The rotation of the screw 33 drives the spacing between the two second rotating rods 11 to move and adjust in the direction of approaching each other, and finally, with the help of the fourth slider 30, it moves downward inside the fourth slide 8, driving the two second rotating rods 11 after rotation adjustment to move to the gap between the two placement plates 6 and the lithium battery pack. As the first double-headed screw 33 continues to rotate, it drives the two second rotating rods 11 to move in the direction of approaching each other, and drives the two second cleaning pads 34 to respectively contact the iron sheets on both sides of the lithium battery pack. At this time, the two placement plates 6 can be controlled to rotate downward to a position away from the lithium battery pack, so that the fourth slider 30 moves up and down inside the fourth slide 8, driving the two second cleaning pads 34 to automatically clean the outer walls of the iron sheets on both sides of the lithium battery pack, thereby improving the cleanliness of the iron sheet surface after welding, which is conducive to the subsequent further processing of the lithium battery pack.

[0051] After the two second cleaning pads 34 clean the outer walls of the iron sheets on both sides of the lithium battery pack, the two second rotating rods 11 can be controlled to move upward together to a position away from the lithium battery pack, and while the two second rotating rods 11 move slowly upward, the two placing plates 6 can be controlled to move slowly in a direction close to each other to support and limit the two sides of the lithium battery pack. Then, the two second rotating rods 11 are controlled to rotate and adjust so that the sides of the two second rotating rods 11 with the vacuum suction cups 32 are rotated to a close position. Then, the two placing plates 6 are controlled to rotate slowly in a direction away from each other, and the two second rotating rods 11 are controlled to move slowly downward to both sides of the lithium battery pack. As the first double-headed screw 33 continues to rotate, the two second rotating rods 11 are driven to move in a direction close to each other, and the two vacuum suction cups 32 are driven to abut against the outer wall of one of the iron sheets. After the vacuum suction cups 32 are controlled to start, The two groups of vacuum suction cups 32 are respectively adsorbed with the iron sheets on both sides of the lithium battery pack, and with the help of the reversal of the first double-headed screw 33, the two groups of vacuum suction cups 32 are driven to pull the iron sheets on both sides of the lithium battery pack, so that the strength between the iron sheets and the lithium batteries after welding can be tested, and with the help of the rotation of the second double-headed screw 35, the lateral positions of the two vacuum suction cups 32 can be driven to adjust, which is convenient for adsorbing and pulling different positions of an iron sheet; the fourth slider 30 can also be used to move up and down inside the fourth slide groove 8 to drive the vertical positions of the two groups of vacuum suction cups 32 to move and adjust, which is convenient for adsorbing and pulling multiple iron sheets in turn, thereby improving the comprehensiveness of the strength test of the iron sheets and lithium batteries after welding. The staff can also adjust the welding parameters related to the spot welding head 39 according to the test results, so that the spot welding head 39 has better quality for subsequent lithium battery welding processing.

[0052] At the same time, after the above-mentioned inspection of the lithium battery pack is completed, according to the inspection result of the welded lithium battery pack, the two second rotating rods 11 with the second cleaning pad 34 are first controlled to rotate to a close position, and then the two second rotating rods 11 and the second cleaning pad 34 are driven to cooperate with each other by the rotation of the first double-headed screw 33 to clamp and fix the lithium battery pack. After the two placing plates 6 are controlled to rotate downward and reset to a horizontal state, the two second rotating rods 11 and the clamped lithium battery pack can be driven by the rotating plate 10 to rotate and adjust. If the lithium battery pack passes the inspection, the lithium battery pack can be controlled to be cleaned. The positive pole of the battery pack rotates to the top, and qualified lithium battery packs are unloaded by manual or preset robotic arms; if the lithium battery pack fails the inspection, the negative pole of the lithium battery pack can be controlled to rotate to the top, and the unqualified lithium battery packs can continue to be unloaded by manual or preset robotic arms. Manual or preset visual inspection equipment can quickly identify qualified and unqualified lithium battery packs based on the changes in the positive and negative poles of the lithium battery packs during unloading, thereby achieving the effect of classified unloading of qualified and unqualified lithium battery packs, without the need for subsequent manual identification and inspection of the lithium battery packs, thereby improving the production efficiency of lithium battery packs.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-point welding device for lithium battery production, comprising a bottom plate (1) and a vertical plate (2), characterized in that: The vertical plate (2) is mounted on the top of the bottom plate (1), and a movable seat (4) is slidably mounted on the top of the bottom plate (1). A limiting mechanism for limiting and fixing a plurality of lithium batteries to be welded is provided inside the movable seat (4), and the limiting mechanism comprises a rotating frame (5) rotatably mounted inside the movable seat (4). Two placement plates (6) are rotatably mounted at both ends of the rotating frame (5). A clamping plate (7) is provided on the side away from the two placement plates (6). A first cleaning mechanism for cleaning the two ends of the plurality of lithium batteries and one side of the iron sheet is provided on the side of the two clamping plates (7) close to the placement plates (6). A second cleaning mechanism for cleaning the other side of the iron sheet after welding is provided on the side of the vertical plate (2) close to the movable seat (4). The other two sides of the vertical plate (2) are provided with welding mechanisms for spot welding the lithium batteries and the iron sheet. A plurality of first through slots (16) are provided inside the two placement plates (6), and both inner walls of the plurality of first through slots (16) inside one of the placement plates (6) are installed with limiting plates, and an arc-shaped plate (17) is installed above the limiting plate on the plurality of first through slots (16) inside one of the placement plates (6); Two second slide grooves (19) are provided on both inner walls of the two placement plates (6), and second sliders (20) are installed inside the two second slide grooves (19). The outer walls of the two clamping plates (7) are connected to the second sliders (20) adjacent to them. The inner walls of the two clamping plates (7) are provided with second through grooves (21) corresponding to the positions of the plurality of first through grooves (16), and the width of the second through grooves (21) is smaller than that of the first through grooves (16). The outer walls of the two clamping plates (7) on one side close to the placement plate (6) are provided with a plurality of groups of rubber strips (22), and the plurality of groups of rubber strips (22) are respectively located on both sides of the plurality of second through grooves (21). The first cleaning mechanism includes a fixed block (23) mounted on the outer wall of one side of the two clamping plates (7) close to the placement plate (6), a third sliding groove (24) is provided on the outer wall of one side of the two fixed blocks (23), a third sliding block (26) is mounted inside the two third sliding grooves (24), and a rotating block (27) is rotatably mounted on one end of the two third sliding blocks (26) away from the third sliding groove (24); The first rotating rod (25) is rotatably mounted on one end of the two rotating blocks (27) away from the third sliding block (26), first cleaning pads (28) are mounted on the outer walls of both sides of the two first rotating rods (25), and multiple industrial cameras (29) are mounted on the outer walls of the other two sides of the two first rotating rods (25), and third through slots (18) are provided inside the two placement plates (6) for the fixed block (23) and the first rotating rod (25) to pass through.

2. The multi-point welding device for lithium battery production according to claim 1, characterized in that: A first slide groove (3) is provided on the top of the base plate (1), a first slider (14) is installed inside the first slide groove (3), the top end of the first slider (14) is connected to the movable seat (4), a driving motor (15) is installed on one side outer wall of the movable seat (4), and the output end of the driving motor (15) is connected to the rotating part of one end of the rotating frame (5).

3. The multi-point welding device for lithium battery production according to claim 1, characterized in that: The second cleaning mechanism comprises a fourth chute (8) provided on an outer wall of a side of the vertical plate (2) close to the movable seat (4), a fourth slider (30) being installed inside the fourth chute (8), a rotating plate (10) being rotatably installed on one end of the fourth slider (30) away from the fourth chute (8), a first groove being provided on an outer wall of a side of the rotating plate (10) away from the fourth slider (30), a first double-headed screw (33) being rotatably installed inside the first groove, and two first movable blocks (31) being threadedly installed on the outer wall of the first double-headed screw (33).

4. The multi-point welding device for lithium battery production according to claim 3, characterized in that: The ends of the two first moving blocks (31) away from the first double-headed screw (33) are both rotatably mounted with a second rotating rod (11), the bottom ends of the two second rotating rods (11) are both provided with a second groove, the interiors of the two second grooves are both rotatably mounted with a second double-headed screw (35), the outer walls of the two second double-headed screws (35) are both threadedly mounted with two second moving blocks (36), the ends of the two second moving blocks (36) away from the second double-headed screw (35) are both mounted with a vacuum suction cup (32), and the top ends of the two second rotating rods (11) are both mounted with a second cleaning pad (34).

5. The multi-point welding device for lithium battery production according to claim 1, characterized in that: The welding mechanism includes a fifth chute (9) opened on the other two outer walls of the vertical plate (2), a fifth slider (37) is installed inside the two fifth chute (9), and a first moving rod (12) is installed at one end of the two fifth sliders (37) away from the fifth chute (9).

6. The multi-point welding device for lithium battery production according to claim 5, characterized in that: The outer walls of the two first moving rods (12) on one side close to the moving seat (4) are each provided with a first sliding groove (38), the interior of the two first sliding grooves (38) is each installed with a first sliding block (40), the ends of the two first sliding blocks (40) away from the first sliding groove (38) are each installed with a second moving rod (13), the interior of the two second moving rods (13) is provided with a second sliding groove (42), the interior of the two second sliding grooves (42) is each slidably installed with a second sliding block (41), and the interior of the two second sliding blocks (41) is each installed with two spot welding heads (39).

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