A lithium battery welding device

Abstract

The present invention discloses a lithium battery welding device, which relates to the technical field of lithium battery welding. The present invention provides a rectangular channel for accommodating multiple lithium batteries on a welding platform, and provides an electric push rod A and an electric push rod B at both ends of the rectangular channel for pushing the lithium batteries to move. At the same time, a laser welding mechanism including a laser welding head and a positioning and clamping structure is provided directly above the welding platform, so as to realize automatic welding during use; at the same time, a feeding system consisting of a feeding mechanism and a discharge chute connected to a vibration plate is provided on the outside of each side plate, so as to realize the feeding of the electrode sheet by the feeding system during welding, and to control the electrode sheet to be welded to be closely attached to the end of the lithium battery for positioning during welding, so as to avoid the positional displacement of the electrode sheet relative to the lithium battery during welding.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery welding, and in particular relates to a lithium battery welding device. Background Art

[0002] Lithium battery welding technology is extremely important in the production process, and its quality directly affects the performance and lifespan of lithium batteries. Lithium battery welding technology specifically includes the welding of wires / leads and the connection of electrode sheets. Electrode sheets are often welded using spot welding technology. Existing lithium battery welding operations mostly use semi-automatic spot welding machines, where the electrodes are welded manually by holding the welding head. This operation requires the position of the electrode sheet to be accurately positioned. Otherwise, human error can easily cause the electrode sheet to shift after welding, resulting in product damage and quality impact.

[0003] Based on this, CN117260048B discloses a lithium battery welding device, which includes: a machine base, on which a flip-angle bearing platform is fixedly installed; two three-axis movable mechanisms, which are respectively arranged on both sides of the bearing platform; a clamping welding part, including a connecting part detachably connected to the movable end of the three-axis movable mechanism, the connecting part is fixedly connected to a transversely arranged bearing seat, and a shaft rod is movably installed on the bearing seat, and a fine-tuning component is provided between one end of the shaft rod and the connecting part. By setting a flip-angle bearing platform in conjunction with the three-axis movable mechanism, multi-angle welding of lithium batteries of different forms can be conveniently performed, thereby increasing the flexibility and adaptability of the device, and setting a clamping plate can utilize the movement of the three-axis movable mechanism to use the clamping plate to contact the electrode sheet before welding at different angles, thereby avoiding the electrode sheet from shifting during welding, increasing safety, and ensuring welding quality; however, it cannot perform automated electrode sheet loading operations when in use. Summary of the Invention

[0004] The object of the present invention is to provide a lithium battery welding device, which is provided with a rectangular channel for accommodating multiple lithium batteries on the welding platform, and an electric push rod A and an electric push rod B are respectively provided at both ends of the rectangular channel to push the lithium batteries to move. At the same time, a laser welding mechanism including a laser welding head and a positioning and clamping structure is provided directly above the welding platform to realize automatic welding during use; at the same time, a feeding system consisting of a feeding mechanism and a discharge chute connected to a vibration disk is provided on the outer side of either side plate, so that the feeding system is used to control the feeding of the electrode sheet during welding, thereby solving the problems raised by the existing background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention relates to a lithium battery welding device, comprising a welding platform, a pair of side plates being provided on the upper surface of the welding platform, a rectangular channel for accommodating the passage of multiple lithium batteries being formed between the two side plates; an electric push rod A and an electric push rod B which are telescopic in the horizontal direction are respectively installed above the welding platform at both ends of the rectangular channel, the output ends of the electric push rod A and the electric push rod B are respectively connected to the push plate A and the push plate B; mounting seats are respectively provided on both sides of the welding platform, a U-shaped frame spanning the two side plates is installed above the two mounting seats, a guide rail and an electric slider cooperating with the guide rail are provided on the U-shaped frame, a mounting plate is provided on the electric slider, a laser welding head and a positioning and clamping structure are respectively provided at both ends of the mounting plate; the positioning and clamping structure comprises a first telescopic cylinder fixed on the mounting plate, a rectangular frame being fixed on the end, a through hole being respectively provided on the opposite side walls of the rectangular frame, and a laser beam emitted by the laser welding head passes through two through holes in a concentric structure.

[0007] Furthermore, the inner wall of the side panel is provided with a plurality of rectangular grooves with equal intervals along its length direction, and rollers are rotatably arranged in the rectangular grooves; at least two rectangular openings are respectively provided on both sides of the upper surface of the welding platform, and the length direction of the rectangular openings is perpendicular to the length direction of the welding platform; one side of the side panel is provided with a protrusion A which is inserted into the rectangular opening and slides along the length direction of the rectangular opening, and the end of the protrusion A is fixed with a T-shaped fixing block by bolts; the end face of the protrusion A is recessed to form a positioning slot, and the end of the T-shaped fixing block is provided with a positioning column inserted into the positioning slot; the bottom side surface of the positioning slot is provided with a threaded blind hole threadedly connected to the bolt, and the T-shaped fixing block is provided with a center hole which penetrates the positioning column and is used for the bolt to pass through.

[0008] Furthermore, the outer wall of the side panel is provided with a loading mechanism for loading electrode sheets, and the loading mechanism includes a discharge chute connected to the vibration plate, and the outer wall of the side panel facing the discharge end of the discharge chute is provided with an electric push rod C that can be extended and retracted in the horizontal direction through an L-shaped bracket, and the end of the electric push rod C is connected to a box body for inserting electrode sheets; the outer wall of the side panel located on one side of the box body is provided with a clamping displacement structure for extracting the electrode sheet from the box body and placing it on the end face of the lithium battery; a U-shaped bracket is provided directly above the discharge end of the discharge chute, and a clamping cylinder is provided on the U-shaped bracket, and the end of the clamping cylinder is provided with a pressure block that presses against an electrode sheet.

[0009] Furthermore, the clamping displacement structure includes an electric push rod D installed on the outer side wall of the side panel, the end of the electric push rod D is connected to a vertical plate, a second telescopic cylinder is installed on the top of a side wall where the vertical plate is connected to the electric push rod D, the end of the second telescopic cylinder is connected to a base block, a third telescopic cylinder is installed on the bottom side of the base block, the end of the third telescopic cylinder is connected to a connecting seat, a pair of circular clamping rods are installed on one side of the connecting seat, a fourth telescopic cylinder is connected to the bottom side of the connecting seat, the end of the fourth telescopic cylinder is connected to a rectangular support rod; the rectangular support rod is located directly below between the two circular clamping rods.

[0010] Furthermore, one side of the electric push rod A is connected to a U-shaped support seat A fixed on the upper surface of the welding platform; a rectangular slot is provided at one end of the welding platform along its length direction, and guide slides are provided on the opposite side walls of the rectangular slot along its length direction, and a movable seat that is movable along the length direction of the rectangular slot is provided in the rectangular slot, and guide slides that cooperate with the guide slides are provided on both sides of the movable seat; a connecting plate is provided on the bottom side surface of the movable seat, and an electric push rod E arranged along the length direction of the welding platform is installed on the bottom side surface of the welding platform; the upper surface of the movable seat is connected to a U-shaped support seat B, and the electric push rod B is installed on the U-shaped support seat B.

[0011] Furthermore, the upper surface of the welding platform is provided with at least one row of detection mechanisms for detecting the position of the lithium battery on the upper surface of the welding platform; the upper surface of the welding platform is provided with a row of concave cavities at equal intervals along its length direction, and the detection mechanism includes a spring A connected to the bottom side of the concave cavity, and the end of the spring A is connected to a movable column that moves up and down along the inner wall of the concave cavity, the top of the movable column is provided with a spherical structure, the bottom end is provided with a convex column, and the end of the convex column is provided with an elastic block; the bottom side of the concave cavity is provided with a pressure sensor; in a natural state, part of the spherical structure protrudes from the upper surface of the welding platform; when the lithium battery slides along the upper surface of the welding platform until it presses against the spherical structure, the movable column is driven to move downward until the elastic block presses against the upper surface of the pressure sensor, and a signal is generated on the upper surface of the pressure sensor at this time; and the multiple pressure sensors are numbered in sequence along the length direction of the welding platform from the electric push rod B to the electric push rod A, and the numbering order is a1, a2,..., an.

[0012] Furthermore, the lithium battery welding method includes the following steps:

[0013] Step 1: Place m lithium batteries side by side on the upper surface of the welding platform, control the electric push rod A to extend to the maximum extension length, and extend the electric push rod B until the two ends of the side-by-side lithium batteries touch the push plate A and push plate B respectively;

[0014] Step 2: Control the electric push rod B to slowly extend and synchronously control the electric push rod A to retract. When the pressure sensors corresponding to numbered a1, a2, ..., am detect pressure signals in sequence, control the laser welding head and the positioning and pressing structure to weld the nickel sheet placed on the lithium battery, thereby completing the welding of one side of the m lithium batteries arranged side by side.

[0015] Step 3: Control the electric slider to move along the length direction of the guide rail to the other side of the m lithium batteries;

[0016] Step 4: Control the electric push rod A to slowly extend and synchronously control the electric push rod B to retract. When the pressure sensors corresponding to numbered am, am-1, ..., a2, and a1 detect the loss of pressure signals in sequence, control the laser welding head and the positioning and pressing structure to weld the nickel sheet placed on the lithium battery, thereby completing the welding of the other side of the m lithium batteries arranged side by side.

[0017] Step 5. After welding is completed, control the electric push rod A to extend to the maximum extent, control the electric push rod E to extend to the maximum extent, and simultaneously control the electric push rod B to retract. At this time, remove the lithium battery that has been welded on the upper surface of the welding platform.

[0018] Furthermore, two rows of concave cavities are provided on the upper surface of the welding platform at equal intervals along its length direction; a cavity connected to the concave cavity is provided in the welding platform directly below any row of concave cavities, and a guide hole is provided on the bottom side of the cavity directly below the concave cavity; a movable seat that moves up and down along its inner wall is movably inserted into the bottom of the concave cavity, and the movable seat is connected to one side of a movable beam A, and the other side of the movable beam A is connected to a guide column that guides through the guide hole, and the end of the guide column is connected to a movable beam B located directly below the welding platform, and between the movable beam B and the welding platform An inner guide sleeve and an outer guide sleeve are connected and sealed with each other, and a spring B is connected between the movable beam B inside the inner guide sleeve and the outer guide sleeve and the welding platform; and one row of the pressure sensors are numbered in sequence along the direction from the electric push rod B to the electric push rod A, and the numbering sequence is a1, a2, ..., an; another row of the pressure sensors are numbered in sequence along the direction from the electric push rod A to the electric push rod B, and the numbering sequence is b1, b2, ..., bn; and several elastic telescopic modules composed of the spring B, the inner guide sleeve and the outer guide sleeve are all connected to an air supply pump.

[0019] Furthermore, the lithium battery welding method includes the following steps:

[0020] Step 11: Place m lithium batteries side by side on the upper surface of the welding platform, control the electric push rod A to extend to its maximum extension length, and control the electric push rod B to extend until the two ends of the side-by-side lithium batteries contact the push plates A and B respectively; and control the elastic telescopic modules corresponding to the pressure sensors numbered a1, a2, ..., an to extend until the movable beam A contacts the inner top side of the cavity;

[0021] Step 12: Control the electric push rod B to slowly extend and synchronously control the electric push rod A to retract. When the pressure sensors corresponding to numbered a1, a2, ..., am detect pressure signals in sequence, control the laser welding head and the positioning and pressing structure to weld the nickel sheet placed on the lithium battery, thereby completing the welding of one side of the m lithium batteries arranged side by side.

[0022] Step 13: Control the electric slider to move along the length direction of the guide rail to the other side of the m lithium batteries;

[0023] Step 14: Control the elastic expansion modules corresponding to the pressure sensors numbered a1, a2, ..., an; and control the elastic expansion modules corresponding to the pressure sensors numbered b1, b2, ..., bn to extend until the movable beam A abuts against the inner top side of the cavity;

[0024] Step 15: Control the electric push rod A to slowly extend and synchronously control the electric push rod B to retract. When the pressure sensors numbered b1, b2, ..., bm detect signals in sequence, the laser welding head and the positioning and pressing structure are controlled to weld the nickel sheet placed on the lithium battery, thereby completing the welding of the other side of the m lithium batteries arranged side by side.

[0025] Step 16: After welding is completed, control the electric push rod A to extend to the maximum extent, control the electric push rod E to extend to the maximum extent, and simultaneously control the electric push rod B to retract. At this time, remove the lithium battery on the upper surface of the welding platform that has been welded.

[0026] Furthermore, the distance between two adjacent cavities is L, which is equal to the width of a lithium battery, and m≤n; the distance between the two cavities numbered an and bn is L1, and L1=2*L+L; and the distance between the two cavities numbered a1 and b1 is L2, and L2=L.

[0027] The present invention has the following beneficial effects:

[0028] The present invention provides a rectangular channel for accommodating multiple lithium batteries on the welding platform, and provides an electric push rod A and an electric push rod B at both ends of the rectangular channel for pushing the lithium batteries to move. At the same time, a laser welding mechanism including a laser welding head and a positioning and clamping structure is provided directly above the welding platform, so as to realize automatic welding during use; at the same time, a feeding system consisting of a feeding mechanism and a discharge chute connected to a vibration plate is provided on the outer side of either side plate, so that the feeding system is used to control the feeding of the electrode sheet during welding, and the feeding system is used to control the electrode sheet to be welded to be tightly attached to the end of the lithium battery for positioning during welding, so as to avoid positional displacement of the electrode sheet relative to the lithium battery during welding.

[0029] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic structural diagram of the lithium battery welding device of the present invention from the right side perspective;

[0032] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0033] Figure 3 for Figure 2 A partial enlarged view of point C in the middle;

[0034] Figure 4 This is a schematic diagram of the structure of the lithium battery welding device of the present invention from the left side perspective;

[0035] Figure 5 This is a schematic diagram of the structure of the lithium battery welding device of the present invention when viewed from bottom up;

[0036] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0037] Figure 7 Schematic diagram of the matching structure of the protrusion A and the T-shaped fixing block of the present invention;

[0038] Figure 8 Schematic diagram of the detection mechanism structure of the present invention;

[0039] Figure 9 Schematic diagram of the distribution structure of the detection mechanism of the present invention;

[0040] Figure 10 This is a schematic diagram of the end position structure of the discharge chute of the present invention;

[0041] Figure 11 This is a schematic diagram of the distribution of two rows of pressure sensors in the present invention. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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.

[0043] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] See also Figure 1 and 4 -5, the present invention is a lithium battery welding device, comprising a welding platform 1, support side panels 18 are provided on both sides of the welding platform 1, a pair of side panels 2 are provided on the upper surface of the welding platform 1, and a rectangular channel for accommodating a plurality of lithium batteries 100 is formed between the two side panels 2; an electric push rod A15 and an electric push rod B14 that are retractable in the horizontal direction are respectively installed above the welding platform 1 at both ends of the rectangular channel, and the output ends of the electric push rod A15 and the electric push rod B14 are respectively connected to a push plate A150 and a push plate B140; and when in use, the electric push rod A15 and the electric push rod B14 are extended and retracted to control the movement of the plurality of lithium batteries 100 back and forth along the length direction thereof in the rectangular channel, and during the movement, the electrode sheet 200 is placed on the top of the lithium battery 100 for welding.

[0045] In order to facilitate the control of the electrode sheet 200 for loading during use, and to control the electrode sheet 200 to be close to the top of the lithium battery 100 to maintain stability during welding, to avoid the electrode sheet 200 from shifting relative to the lithium battery 100 during welding; Figure 2-3The present invention sets a feeding mechanism 4 for feeding the electrode sheet 200 on the outer wall of the side panel 2. The feeding mechanism 4 includes a discharge chute 3 connected to the vibration plate. The outer wall of the side panel 2 facing the discharge end of the discharge chute 3 is installed with an electric push rod C46 that is telescopic in the horizontal direction through an L-shaped bracket 45. The end of the electric push rod C46 is connected to a box body 47 for inserting the electrode sheet 200; the outer wall of the side panel 2 on one side of the box body 47 is installed with a clamping displacement structure for extracting the electrode sheet 200 from the box body 47 and placing it on the end face of the lithium battery 100; and the clamping displacement structure includes a clamping mechanism installed on the outer wall of the side panel 2 The electric push rod D40 has a vertical plate 41 connected to the end of the electric push rod D40, and a second telescopic cylinder 42 is installed on the top of the side wall where the vertical plate 41 is connected to the electric push rod D40. The end of the second telescopic cylinder 42 is connected to the base block 421, and the bottom side of the base block 421 is installed with a third telescopic cylinder 43. The end of the third telescopic cylinder 43 is connected to the connecting seat 431, and a pair of circular clamping rods 433 are installed on one side of the connecting seat 431. The bottom side of the connecting seat 431 is connected to the fourth telescopic cylinder 44, and the end of the fourth telescopic cylinder 44 is connected to the rectangular support rod 441; the rectangular support rod 441 is located directly below between the two circular clamping rods 433.

[0046] It can be known that when in use, the vibration plate is controlled to vibrate and transport the electrode sheet 200 located inside it to the discharge chute 3. At this time, the electrode sheet 200 moves along the length direction of the discharge chute 3 until it falls into the box body 47. When the end of the electrode sheet 200 is completely inserted into the box body 47, the electric push rod C46 is controlled to retract and the end of the electrode sheet 200 is controlled to be separated from the discharge chute 3. At this time, a pair of circular clamping rods 433 and rectangular support rods 441 of the clamping displacement structure are controlled to clamp the upper and lower parts of the middle of the electrode sheet 200. After the surface has clamped the electrode sheet 200, the control electric push rod C46 continues to contract, and the control electrode sheet 200 is completely moved out of the box body 47. At this time, the control electric push rod D40, the second telescopic cylinder 42, the third telescopic cylinder 43 and the fourth telescopic cylinder 44 place the electrode sheet 200 on the top of the lithium battery 100, and during welding, the control electrode sheet 200 is tightly attached to the top of the lithium battery 100 to remain stable, so as to avoid position displacement of the electrode sheet 200 relative to the lithium battery 100 during welding.

[0047] In the above process, when the electric push rod C46 is controlled to retract, the electrode sheet 200 at the discharge end of the discharge chute 3 is prevented from falling from the discharge end of the discharge chute 3; Figure 10A U-shaped bracket 31 is provided just above the discharge end of the discharge trough 3, and a clamping cylinder 32 is provided on the U-shaped bracket 31. The end of the clamping cylinder 32 is provided with a pressing block 33 that presses against an electrode sheet 200. Then, when the electric push rod C46 is controlled to retract, the clamping cylinder 32 is controlled to extend to the end of the pressing block 33 to press against the electrode sheet 200, thereby preventing the electrode sheet 200 located at the discharge end of the discharge trough 3 from falling from the discharge end of the discharge trough 3.

[0048] In order to weld the electrode sheets 200 on both sides of the lithium battery 100 during use, the welding platform 1 provided by the present invention is provided with mounting seats 11 on both sides. Figure 2-3 A U-shaped frame 5 spanning the two side plates 2 is installed above the two mounting seats 11. The U-shaped frame 5 is provided with a guide rail 51 and an electric slider 52 cooperating with the guide rail 51. A mounting plate 53 is provided on the electric slider 52. Both ends of the mounting plate 53 are respectively provided with a laser welding head 54 and a positioning and clamping structure; the positioning and clamping structure includes a first telescopic cylinder 55 fixed on the mounting plate 53, and a rectangular frame 56 is fixed at the end thereof. A through hole 561 is respectively provided on the opposite side walls of the rectangular frame 56. The laser beam emitted by the laser welding head 54 passes through the two through holes 561 in a concentric structure. When in use, the through hole 561 is provided. By controlling the electric slider 52 to move on the guide rail 51, the laser welding mechanism composed of the laser welding head 54 and the positioning and clamping structure can be conveniently controlled to generate horizontal displacement during use, thereby achieving welding of the electrode sheets 200 on both sides of the lithium battery 100 while controlling the lithium battery 100 to move back and forth along its length in the rectangular channel; and when welding, the first telescopic cylinder 55 is controlled to extend to drive the rectangular frame 56 to rest on the electrode sheet 200 placed on the top of the lithium battery 100, and then the laser welding head 54 is controlled to work to weld the electrode sheet 200 to the top of the lithium battery 100.

[0049] During the actual welding operation, when an electrode sheet 200 is welded and connected between the tops of two adjacent lithium batteries 100, the clamping displacement structure is controlled to grab the electrode sheet 200 and control the electrode sheet 200 to be placed on the top of the lithium battery 100. After one end of the electrode sheet 200 is welded to the top of the lithium battery 100, the clamping displacement structure is controlled to move away from the electrode sheet 200, and then the lithium battery 100 is controlled to move along its length direction in the rectangular channel by a distance of the thickness of the lithium battery 100, and then the laser welding head 54 is controlled to work and then weld the other end of the electrode sheet 200 to the top of another lithium battery 100.

[0050] It can be known that in order to facilitate the control of the lithium battery 100 to move back and forth along its length in the rectangular channel during use, the inner wall of the side plate 2 provided by the present invention is provided with a plurality of rectangular grooves 20 at equal intervals along its length, and rollers 21 are rotatably arranged in the rectangular grooves 20; at least two rectangular openings 10 are respectively provided on both sides of the upper surface of the welding platform 1, and the length direction of the rectangular openings 10 is perpendicular to the length direction of the welding platform 1; and thus, during use, it is convenient to control the end faces of both sides of the lithium battery 100 to respectively rest against the rollers 21, and drive the rollers 21 to rotate in the process of controlling the movement of the lithium battery 100 along the upper surface of the welding platform 1.

[0051] When in use, in order to adjust the distance between the two side plates 2 according to the size of the lithium battery 100, as shown in FIG. Figure 6 and 7 One side of the side panel 2 provided by the present invention is provided with a protrusion A23 inserted into the rectangular opening 10 and sliding along the length direction of the rectangular opening 10, and the end of the protrusion A23 is fixed with a T-shaped fixing block 24 by a bolt 25; the end surface of the protrusion A23 is recessed to form a positioning slot 231, and the end of the T-shaped fixing block 24 is provided with a positioning column 241 inserted into the positioning slot 231; the bottom side surface of the positioning slot 231 is provided with a threaded blind hole 232 threadedly connected to the bolt 25, and the T-shaped fixing block 24 is provided with a center hole 242 that penetrates the positioning column 241 and is used for the bolt 25 to pass through.

[0052] Due to the limitation of the maximum and minimum extension lengths of the electric push rod B14 in actual use, in order to facilitate the control of the lithium battery 100 to be placed on the welding platform 1 in actual operation, and to facilitate the use of the electric push rod B14 and the electric push rod A15 to control the lithium battery 100 to move along its length direction in the rectangular channel; one side of the electric push rod A15 provided by the present invention is connected to a U-shaped support seat A151 fixed to the upper surface of the welding platform 1; one end of the welding platform 1 is provided with a rectangular notch 12 along its length direction, and the rectangular notch 12 is provided with a U-shaped support seat A151 fixed to the upper surface of the welding platform 1; one end of the welding platform 1 is provided with a rectangular notch 12 along its length direction, and the rectangular notch 12 is provided with a U-shaped support seat A151 fixed to the upper surface of the welding platform 1; the U-shaped support seat A151 is ... Guide slides 121 are provided on both side walls along their length directions, and a movable seat 13 that is movable along the length direction of the rectangular slot 12 is provided in the rectangular slot 12, and guide slots 130 that cooperate with the guide slides 121 are provided on both sides of the movable seat 13; a connecting plate 131 is provided on the bottom side surface of the movable seat 13, and an electric push rod E132 arranged along the length direction of the welding platform 1 is installed on the bottom side surface of the welding platform 1; the upper surface of the movable seat 13 is connected to a U-shaped support seat B141, and the electric push rod B14 is installed on the U-shaped support seat B141.

[0053] It can be known that in order to conveniently control the movement of the lithium battery 100 along its length in the rectangular channel during use, by controlling the extension and contraction of the electric push rod B14 and the electric push rod A15, and synchronously controlling the laser welding mechanism to weld the lithium battery 100 placed on the electrode sheet 100, at least one row of detection mechanisms 6 for detecting the position of the lithium battery 100 on the upper surface of the welding platform 1 is provided on the upper surface of the welding platform 1; ten concave cavities 16 are provided on the upper surface of the welding platform 1 at equal intervals along its length direction; Figure 8 The detection mechanism 6 includes a spring A63 connected to the bottom side of the cavity 16, and the end of the spring A63 is connected to a movable column 60 that moves up and down along the inner wall of the cavity 16, and a spherical structure 61 is provided at the top of the movable column 60, and a convex column 62 is provided at the bottom end, and an elastic block 65 is provided at the end of the convex column 62; a pressure sensor 64 is provided on the bottom side of the cavity 16; in a natural state, part of the spherical structure 61 protrudes from the upper surface of the welding platform 1; when the lithium battery 100 slides along the upper surface of the welding platform 1 until it is pressed against the spherical structure 61, the movable column 60 is driven to move downward until the elastic block 65 is pressed against the upper surface of the pressure sensor 64, and at this time a signal is generated on the upper surface of the pressure sensor 64; and multiple pressure sensors 64 are numbered in sequence along the length direction of the welding platform 1 from the electric push rod B14 to the electric push rod A15, and the numbering sequence is a1, a2,..., a10.

[0054] Based on the above, the lithium battery welding method based on the lithium battery welding device of the present invention specifically includes the following steps:

[0055] Step 1: Place seven lithium batteries 100 side by side on the upper surface of the welding platform 1, control the electric push rod A15 to extend to the maximum extension length, and extend the electric push rod B14 until the two ends of the side-by-side lithium batteries 100 contact the push plate A150 and push plate B140 respectively;

[0056] Step 2: Control the electric push rod B14 to slowly extend, and synchronously control the electric push rod A15 to retract. When the pressure sensors 64 corresponding to the numbers a1, a2, ..., a7 detect the pressure signals in sequence, control the laser welding head 54 and the positioning and pressing structure to weld the nickel sheet 200 placed on the lithium battery 100, thereby completing the welding of one side of the seven lithium batteries 100 arranged side by side.

[0057] Step 3: Control the electric slider 52 to move along the length direction of the guide rail 51 to the other side of the seven lithium batteries 100;

[0058] Step 4: Control the electric push rod A15 to slowly extend and synchronously control the electric push rod B14 to retract. When the pressure sensors 64 corresponding to the numbers a7, a6, ..., a2, and a1 detect the loss of pressure signals in sequence, control the laser welding head 54 and the positioning and pressing structure to weld the nickel sheet 200 placed on the lithium battery 100, thereby completing the welding of the other side of the m lithium batteries 100 arranged side by side.

[0059] Step 5: After welding is completed, control the electric push rod A15 to extend to the maximum extent, control the electric push rod E132 to extend to the maximum extent, and synchronously control the electric push rod B14 to retract, and then take out the lithium battery 100 located on the upper surface of the welding platform 1 that has been welded.

[0060] Of course, based on the above, if Figure 9 and 11 , when two rows of concave cavities 16 are provided on the upper surface of the welding platform 1 along its length direction with equal spacing; a cavity 17 communicating with the concave cavity 16 is provided in the welding platform 1 directly below any row of concave cavities 16, and a guide hole 19 is provided on the bottom side of the cavity 17 directly below the concave cavity 16; a movable seat 66 movable up and down along its inner wall is movably inserted into the bottom of the concave cavity 16, and the movable seat 66 is connected to one side of a movable beam A65, and the other side of the movable beam A65 is connected to a guide column 67 guiding through the guide hole 19, and the end of the guide column 67 is connected to a movable beam B69 located directly below the welding platform 1, and the movable beam B69 and the welding platform 1 are connected to each other closely. The inner guide sleeve 681 and the outer guide sleeve 682 are sealed and matched, and the spring B68 is connected between the movable beam B69 inside the inner guide sleeve 681 and the outer guide sleeve 682 and the welding platform 1; and a row of pressure sensors 64 are numbered in sequence along the direction from the electric push rod B14 to the electric push rod A15, and the numbering sequence is a1, a2, ..., a10; another row of pressure sensors 64 are numbered in sequence along the direction from the electric push rod A15 to the electric push rod B14, and the numbering sequence is b1, b2, ..., b10; and several elastic telescopic modules composed of the spring B68, the inner guide sleeve 681 and the outer guide sleeve 682 are all connected to an air supply pump.

[0061] Furthermore, the lithium battery welding method includes the following steps:

[0062] Step 11: Place seven lithium batteries 100 side by side on the upper surface of the welding platform 1, control the electric push rod A15 to extend to its maximum extension length, and control the electric push rod B14 to extend until the two ends of the side-by-side lithium batteries 100 contact the push plates A150 and B140 respectively; and control the elastic expansion modules corresponding to the numbered a1, a2, ..., a10 of the pressure sensor 64 to extend until the movable beam A65 abuts against the inner top side of the cavity 17;

[0063] Step 12: Control the electric push rod B14 to slowly extend, and synchronously control the electric push rod A15 to retract. When the pressure sensors 64 corresponding to numbers a1, a2, ..., a7 detect pressure signals in sequence, control the laser welding head 54 and the positioning and pressing structure to weld the nickel sheet 200 placed on the lithium battery 100, thereby completing the welding of one side of the seven lithium batteries 100 arranged side by side.

[0064] Step 13: Control the electric slider 52 to move along the length direction of the guide rail 51 to the other side of the m lithium batteries 100;

[0065] Step 14: Control the elastic expansion modules corresponding to the pressure sensors 64 numbered a1, a2, ..., a10; and control the elastic expansion modules corresponding to the pressure sensors 64 numbered b1, b2, ..., b10 to extend until the movable beam A65 abuts against the inner top side of the cavity 17;

[0066] Step 15: Control the electric push rod A15 to slowly extend and synchronously control the electric push rod B14 to retract. When the pressure sensors 64 corresponding to the numbers b1, b2, ..., b7 detect signals in sequence, the laser welding head 54 and the positioning and pressing structure are controlled to weld the nickel sheet 200 placed on the lithium battery 100, thereby completing the welding of the other side of the seven lithium batteries 100 arranged side by side.

[0067] Step 16: After welding is completed, control the electric push rod A15 to extend to the maximum extent, control the electric push rod E132 to extend to the maximum extent, and synchronously control the electric push rod B14 to retract, and then remove the welded lithium battery 100 located on the upper surface of the welding platform 1.

[0068] The distance between two adjacent cavities 16 is L, which is equal to the width of a lithium battery 100; the distance between the two cavities 16 numbered a10 and b10 is L1, L1=17L; and the distance between the two cavities 16 numbered a1 and b1 is L2, L2=L.

[0069] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0070] 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 lithium battery welding device, characterized in that: It comprises a welding platform (1), wherein a pair of side plates (2) are provided on the upper surface of the welding platform (1), and a rectangular channel for accommodating a plurality of lithium batteries (100) is formed between the two side plates (2); An electric push rod A (15) and an electric push rod B (14) that extend and retract in the horizontal direction are respectively installed above the welding platforms (1) at both ends of the rectangular channel, and the output ends of the electric push rod A (15) and the electric push rod B (14) are respectively connected to the push plate A (150) and the push plate B (140); The outer side wall of the side plate (2) is provided with a loading mechanism (4) for loading the electrode sheet (200), the loading mechanism (4) comprising a discharge chute (3) connected to a vibration plate, and an electric push rod C (46) that is telescopic in a horizontal direction is installed on the outer side wall of the side plate (2) facing the discharge end of the discharge chute (3) via an L-shaped bracket (45), and the end of the electric push rod C (46) is connected to a box body (47) for inserting the electrode sheet (200); The outer side wall of the side plate (2) located on one side of the box body (47) is equipped with a clamping displacement structure for extracting the electrode sheet (200) located in the box body (47) from the box body (47) and placing it on the end surface of the lithium battery (100); A U-shaped bracket (31) is provided just above the discharge end of the discharge chute (3), a clamping cylinder (32) is provided on the U-shaped bracket (31), and a pressing block (33) is provided at the end of the clamping cylinder (32) to press against an electrode sheet (200); Mounting seats (11) are respectively provided on both sides of the welding platform (1), a U-shaped frame (5) spanning the two side panels (2) is installed above the two mounting seats (11), a guide rail (51) and an electric slider (52) cooperating with the guide rail (51) are provided on the U-shaped frame (5), a mounting plate (53) is provided on the electric slider (52), and laser welding heads (54) and a positioning and pressing structure are respectively provided at both ends of the mounting plate (53); The positioning and pressing structure comprises a first telescopic cylinder (55) fixed on the mounting plate (53), a rectangular frame (56) being fixed to the end of the first telescopic cylinder (55), a through hole (561) being respectively provided on opposite side walls of the rectangular frame (56), and a laser beam emitted by the laser welding head (54) passing through the two concentric through holes (561); The upper surface of the welding platform (1) is provided with at least one row of detection mechanisms (6) for detecting the position of the lithium battery (100) on the upper surface of the welding platform (1); when a pressure signal is detected, the laser welding head (54) and the positioning and pressing structure are controlled to weld the nickel sheet (200) placed on the lithium battery (100).

2. A lithium battery welding device according to claim 1, characterized in that: The inner side wall of the side plate (2) is provided with a plurality of rectangular grooves (20) at equal intervals along its length direction, and rollers (21) are rotatably provided in the rectangular grooves (20); At least two rectangular openings (10) are respectively provided on both sides of the upper surface of the welding platform (1), and the length direction of the rectangular openings (10) is perpendicular to the length direction of the welding platform (1); One side of the side plate (2) is provided with a protrusion A (23) inserted into the rectangular opening (10) and sliding along the length direction of the rectangular opening (10), and the end of the protrusion A (23) is fixed with a T-shaped fixing block (24) by means of a bolt (25); the end surface of the protrusion A (23) is recessed to form a positioning slot (231), and the end of the T-shaped fixing block (24) is provided with a positioning column (241) inserted into the positioning slot (231); The bottom side of the positioning slot (231) is provided with a threaded blind hole (232) threadedly connected to the bolt (25), and the T-shaped fixing block (24) is provided with a center hole (242) penetrating the positioning column (241) and for the bolt (25) to pass through.

3. A lithium battery welding device according to claim 1, characterized in that: The clamping displacement structure includes an electric push rod D (40) installed on the outer wall of the side plate (2), the end of the electric push rod D (40) is connected to a vertical plate (41), a second telescopic cylinder (42) is installed on the top of a side wall where the vertical plate (41) and the electric push rod D (40) are connected, the end of the second telescopic cylinder (42) is connected to a base block (421), a third telescopic cylinder (43) is installed on the bottom side of the base block (421), the end of the third telescopic cylinder (43) is connected to a connecting seat (431), a pair of circular clamping rods (433) are installed on one side of the connecting seat (431), the bottom side of the connecting seat (431) is connected to a fourth telescopic cylinder (44), and the end of the fourth telescopic cylinder (44) is connected to a rectangular support rod (441); The rectangular support rod (441) is located directly below between the two circular clamping rods (433).

4. A lithium battery welding device according to claim 1, characterized in that: One side of the electric push rod A (15) is connected to a U-shaped support seat A (151) fixed on the upper surface of the welding platform (1); A rectangular notch (12) is provided at one end of the welding platform (1) along its length direction, and guide slides (121) are provided on opposite side walls of the rectangular notch (12) along its length direction, and a movable seat (13) movable along the length direction of the rectangular notch (12) is provided in the rectangular notch (12), and guide grooves (130) are provided on both sides of the movable seat (13) respectively for cooperating with the guide slides (121); The bottom side of the movable seat (13) is provided with a connecting plate (131), and the bottom side of the welding platform (1) is provided with an electric push rod E (132) arranged along the length direction of the welding platform (1); The upper surface of the movable seat 1 (13) is connected to a U-shaped support seat B (141), and the electric push rod B (14) is installed on the U-shaped support seat B (141).

5. A lithium battery welding device according to claim 4, characterized in that: A row of concave cavities (16) are provided on the upper surface of the welding platform (1) at equal intervals along its length direction. The detection mechanism (6) includes a spring A (63) connected to the bottom side of the concave cavity (16), and the end of the spring A (63) is connected to a movable column (60) that moves up and down along the inner wall of the concave cavity (16). The top of the movable column (60) is provided with a spherical structure (61), and the bottom end is provided with a convex column (62), and the end of the convex column (62) is provided with an elastic block (65); the bottom side of the concave cavity (16) is provided with a pressure sensor (64); In a natural state, a portion of the spherical structure (61) protrudes from the upper surface of the welding platform (1); when the lithium battery (100) slides along the upper surface of the welding platform (1) until it presses against the spherical structure (61), the movable column (60) is driven to move downward until the elastic block (65) presses against the upper surface of the pressure sensor (64), and at this time, a signal is generated on the upper surface of the pressure sensor (64); The plurality of pressure sensors (64) are numbered in sequence along the length direction of the welding platform (1) from the electric push rod B (14) to the electric push rod A (15), and the numbering sequence is a1, a2, ..., an.

6. A lithium battery welding device according to claim 5, characterized in that: The lithium battery welding method based on the above lithium battery welding device includes the following steps: Step 1: Place m parallel lithium batteries (100) on the upper surface of the welding platform (1), control the electric push rod A (15) to extend to the maximum extension length, and extend the electric push rod B (14) until both ends of the parallel lithium batteries (100) contact the push plate A (150) and the push plate B (140) respectively; Step 2: Control the electric push rod B (14) to slowly extend, and synchronously control the electric push rod A (15) to retract. When the pressure sensors (64) corresponding to the numbers a1, a2, ..., am detect the pressure signals in sequence, control the laser welding head (54) and the positioning and pressing structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of one side of the m lithium batteries (100) arranged side by side. Step 3: Control the electric slider (52) to move along the length direction of the guide rail (51) to the other side of the m lithium batteries (100); Step 4: Control the electric push rod A (15) to slowly extend and synchronously control the electric push rod B (14) to retract. When the pressure sensors (64) corresponding to the numbers am, am-1, ..., a2, and a1 detect the loss of pressure signals in sequence, control the laser welding head (54) and the positioning and pressing structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of the other side of the m lithium batteries (100) arranged side by side. Step 5: After the welding is completed, the electric push rod A (15) is controlled to extend to the maximum extent, the electric push rod E (132) is controlled to extend to the maximum extent, and the electric push rod B (14) is controlled to retract simultaneously. At this time, the lithium battery (100) located on the upper surface of the welding platform (1) that has been welded is removed.

7. The lithium battery welding device according to claim 5, characterized in that: The upper surface of the welding platform (1) is provided with two rows of concave cavities (16) at equal intervals along its length direction; A cavity (17) communicating with the cavity (16) is provided in the welding platform (1) located directly below any row of the cavities (16), and a guide hole (19) is provided on the bottom side of the cavity (17) located directly below the cavities (16); A movable seat 2 (66) that moves up and down along the inner wall of the concave cavity (16) is movably inserted into the bottom of the concave cavity (16), and the movable seat 2 (66) is connected to one side of a movable beam A (65). The other side of the movable beam A (65) is connected to a guide column (67) that guides through the guide hole (19). The end of the guide column (67) is connected to a movable beam B (69) located directly below the welding platform (1). An inner guide sleeve (681) and an outer guide sleeve (682) that seal and guide each other are connected between the movable beam B (69) and the welding platform (1), and a spring B (68) is connected between the movable beam B (69) and the welding platform (1) inside the inner guide sleeve (681) and the outer guide sleeve (682). A row of the pressure sensors (64) are numbered in sequence along the direction from the electric push rod B (14) to the electric push rod A (15), and the numbering sequence is a1, a2, ..., an; The pressure sensors (64) in another row are numbered in sequence from the electric push rod A (15) to the electric push rod B (14), and the numbering sequence is b1, b2, ..., bn; Furthermore, a plurality of elastic telescopic modules composed of the spring B (68), the inner guide sleeve (681) and the outer guide sleeve (682) are all connected to an air supply pump.

8. The lithium battery welding device according to claim 5, characterized in that: The lithium battery welding method based on the above lithium battery welding device includes the following steps: Step 11: Place m parallel lithium batteries (100) on the upper surface of the welding platform (1), control the electric push rod A (15) to extend to the maximum extension length, and control the electric push rod B (14) to extend until the two ends of the parallel lithium batteries (100) contact the push plate A (150) and the push plate B (140) respectively; and control the elastic telescopic modules corresponding to the numbered a1, a2, ..., an of the pressure sensor (64) to extend until the movable beam A (65) abuts against the inner top side of the cavity (17); Step 12: Control the electric push rod B (14) to slowly extend, and synchronously control the electric push rod A (15) to retract. When the pressure sensors (64) corresponding to the numbers a1, a2, ..., am detect the pressure signals in sequence, control the laser welding head (54) and the positioning and pressing structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of one side of the m lithium batteries (100) arranged side by side. Step 13: Control the electric slider (52) to move along the length direction of the guide rail (51) to the other side of the m lithium batteries (100); Step 14: Control the elastic expansion modules corresponding to the pressure sensors (64) numbered a1, a2, ..., an; and control the elastic expansion modules corresponding to the pressure sensors (64) numbered b1, b2, ..., bn to extend until the movable beam A (65) abuts against the inner top side of the cavity (17); Step 15, controlling the electric push rod A (15) to slowly extend and synchronously controlling the electric push rod B (14) to retract, when the pressure sensors (64) numbered b1, b2, ..., bm detect signals in sequence, simultaneously controlling the laser welding head (54) and the positioning and pressing structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of the other side of the m lithium batteries (100) arranged side by side; Step 16: After the welding is completed, the electric push rod A (15) is controlled to extend to the maximum extent, the electric push rod E (132) is controlled to extend to the maximum extent, and the electric push rod B (14) is controlled to retract simultaneously. At this time, the lithium battery (100) located on the upper surface of the welding platform (1) is taken out.

9. A lithium battery welding device according to claim 8, characterized in that: The distance between two adjacent concave cavities (16) is L, which is equal to the width of a lithium battery (100), and m≤n; The distance between the two concave cavities (16) numbered an and bn is L1, where L1=2(n-2)*L+L; The distance between the two concave cavities (16) numbered a1 and b1 is L2, where L2=L.

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