A battery cell welding machine

Abstract

The present invention relates to the technical field of battery cell production, and in particular to a battery cell welding machine; the machine comprises a bracket, a welding platform, a welding device and a wire feeding device; the welding platform moves relative to a first bracket, and the welding device is arranged on the first bracket; the wire feeding device comprises a coil rack, a guide rail, a traction assembly, a wire supporting assembly and a wire cutting assembly, the traction assembly is slidably connected to the guide rail, the wire cutting assembly is arranged between the traction assembly and the wire supporting assembly, and the wire cutting assembly is arranged between the welding device and the wire supporting assembly; the traction assembly clamps the end of an external welding wire coil and pulls it out, the body of the external welding wire coil slides along the wire supporting assembly, the wire cutting assembly cuts the pulled welding wire to form welding wire segments and new ends of the welding wire coil, the welding device welds the cut welding wire segments to an external battery cell placed on the welding platform, and the wire supporting assembly is used to support the new end of the welding wire coil; the repeated clamping of the traction assembly is convenient, and the rapid welding wire processing requirements are achieved while meeting the high-frequency wire supply requirements, thereby improving production efficiency and reducing energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production, and in particular to a battery cell welding machine. Background Art

[0002] In the production process of battery cell string welding, welding wire is needed to connect multiple battery cells in series, that is, to connect multiple battery cells in a long string. According to different production requirements, welding wires of different lengths are provided to string multiple battery cells. When the production requires only welding two adjacent battery cells, there is a demand for multiple supplies of shorter welding wires, that is, a larger number of welding wire segments are required to be supplied to two adjacent battery cells in sequence along the length direction of the multiple battery cells, so the wire supply frequency is increased. Under normal circumstances, the end of the welding wire coil is in a drooping state under the action of gravity, resulting in the traction mechanism repeatedly clamping the end of the welding wire coil. It needs to be repeatedly lifted and lowered to clamp the end of the welding wire and then pull out the welding wire to complete the cutting, resulting in a long production cycle and the disadvantage of energy consumption. It cannot meet production requirements and needs to be improved. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art such as long production cycle and energy consumption, the present invention aims to provide a battery cell welding machine which improves production efficiency and reduces energy consumption.

[0004] To achieve the above object, the technical solution of the present invention is:

[0005] A battery cell welding machine comprises a first bracket, a welding table, a welding device and a wire supply device;

[0006] The welding platform is used to carry external battery cells, the welding platform moves horizontally relative to the first bracket, and the welding device is arranged on the first bracket and is located directly above the welding platform;

[0007] The wire feeding device comprises a material coil rack, a guide rail, a traction assembly, a wire supporting assembly and a wire cutting assembly, wherein the guide rail is arranged parallel to the welding platform, the traction assembly is slidably connected to the guide rail, the wire supporting assembly is arranged on the guide rail, the wire cutting assembly is arranged between the traction assembly and the wire supporting assembly, and the wire cutting assembly is arranged between the welding device and the wire supporting assembly;

[0008] The coil rack is used to carry the external welding wire coil, the traction assembly clamps the end of the external welding wire coil and pulls it out, the body of the external welding wire coil slides along the wire supporting assembly, the wire cutting assembly cuts the pulled welding wire to form welding wire segments and a new end of the welding wire coil, the welding device welds the cut welding wire segments to the external battery cell placed on the welding table, and the wire supporting assembly is used to support the new end of the welding wire coil.

[0009] Furthermore, the soldering station includes a slide, a support body, a heat insulating member, a base plate, a first loading plate, a soldering station drive source and a heating member. The soldering station drive source is arranged on the slide and drives the support body to slide along the slide. The heat insulating member is arranged on the support body so that the base plate and the support body are spaced apart. The first loading plate is arranged on the base plate. The heating member is arranged on the first loading plate. The first loading plate is used to carry external battery cells.

[0010] Furthermore, the welding device includes a first jig, a second jig, a laser welding assembly, a first driving member and a second driving member, the first driving member is arranged on the first bracket and drives the first jig to rise and fall, the second driving member is arranged on the first bracket and drives the second jig to rise and fall, the laser welding assembly is located between the first jig and the second jig, and the horizontal distance between the first jig and the second jig is adjustable.

[0011] Furthermore, the traction assembly includes a first mounting plate, a wire clamping member and a third driving member, the third driving member drives the first mounting plate to move, the wire clamping member is arranged on the first mounting plate, the wire clamping member includes a second mounting plate, a wire clamping cylinder and a first pressure rod, the second mounting plate is arranged on the first mounting plate, the wire clamping cylinder is arranged on the second mounting plate and drives the first pressure rod to swing so that the first pressure rod presses the original end of the external welding wire coil or the new end of the welding wire coil on the second mounting plate.

[0012] Furthermore, the wire supporting assembly includes a second loading plate, a trough body, an inner supporting member and a fourth driving member, the fourth driving member drives the second loading plate to move, the trough bodies are arranged along the width direction of the second loading plate and penetrate the second loading plate, the inner supporting member is arranged in the trough body, the original end of the external welding wire coil or the new end of the welding wire coil is clamped and pulled out via the traction assembly, the main body of the welding wire slides in the trough body, the wire cutting assembly cuts the pulled welding wire into welding wire segments and new ends of the welding wire coil, and the inner supporting member supports the new end of the external welding wire coil.

[0013] Furthermore, the inner support member includes a feed section, a middle section and a discharge section which are connected in sequence, the feed section is arranged close to the material roll rack, and the upper surface of the feed section is higher than the upper surface of the discharge section.

[0014] Furthermore, the second loading plate includes a front portion and a rear portion, the thickness of the front portion is smaller than the thickness of the rear portion, the front portion is arranged close to the traction assembly, and the trough body is located at the front portion and the rear portion.

[0015] Furthermore, the wire cutting assembly includes a second bracket, a wire pressing piece and a shearing piece. The wire pressing piece and the shearing piece are both arranged on the second bracket and located directly above the welding platform. The wire pressing piece is arranged close to the wire supporting assembly.

[0016] Furthermore, the wire pressing member includes a wire plate, a second pressure rod and a second pressure rod driving source. The wire plate is arranged on the second bracket. The second pressure rod driving source drives the second pressure rod to approach or move away from the wire plate so that the external welding wire is pressed on the wire plate by the second pressure rod.

[0017] Furthermore, the shearing member includes a lower cutter, an upper cutter and an upper cutter driving member, the lower cutter is arranged on the second bracket, and the upper cutter driving member is arranged on the second bracket and drives the upper cutter to move towards or away from the lower cutter.

[0018] The beneficial effects of the present invention are as follows: a wire supply device consisting of a material coil rack, a guide rail, a traction assembly, a wire supporting assembly and a wire cutting assembly is provided, the wire cutting assembly is located between the traction assembly and the wire supporting assembly, the welding platform moves horizontally relative to the first bracket, the welding device is provided on the first bracket, the wire cutting assembly is located between the welding device and the wire supporting assembly, the end of the external welding wire material coil is always located in the wire supporting assembly, and repeated clamping of the traction assembly is convenient, thereby achieving rapid welding wire processing requirements while meeting higher frequency wire supply needs, improving production efficiency and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1-1 It is a schematic diagram of the three-dimensional structure from a first viewing angle of the present invention;

[0020] Figure 1-2 is a schematic diagram of a second viewing angle stereoscopic structure of the present invention;

[0021] Figure 2-1 It is a schematic diagram of the position structure of the traction assembly, the wire assembly and the guide rail of the present invention;

[0022] Figure 2-2 It is a schematic diagram of the three-dimensional structure of the traction assembly of the present invention;

[0023] Figure 2-3 It is a schematic diagram of the structure of the wire clamping member of the present invention;

[0024] Figure 2-4 It is a schematic diagram of the three-dimensional structure of the tow wire assembly of the present invention;

[0025] Figure 2-5 It is a schematic diagram of the structure of the carrier plate and the tank body of the present invention;

[0026] Figure 2-6 It is a schematic diagram of the structure of the inner support member of the present invention;

[0027] Figure 3-1 It is a schematic diagram of the structure of the shredding assembly of the present invention;

[0028] Figure 3-2 It is a three-dimensional cross-sectional view of the slicing assembly of the present invention;

[0029] Figure 3-3 for Figure 3-2 A partial enlarged schematic diagram of part A;

[0030] Figure 3-4 It is a schematic diagram of the disassembled structure of the wire pressing part of the present invention;

[0031] Figure 4-1 It is a structural schematic diagram of the present invention;

[0032] Figure 4-2 It is a structural schematic diagram of the present invention;.

[0033] Reference numerals include:

[0034] 1—first bracket 2—welding table 20—sliding table

[0035] 21 - support 22 - thermal insulation 23 - bottom plate

[0036] 24 - first carrier plate 25 - soldering station drive source

[0037] 3—Welding device 31—First fixture 32—Second fixture

[0038] 33 - Laser welding assembly 34 - First driving member 35 - Second driving member

[0039] 4—Wire feeding device 41—Reel stand 42—Guide rail

[0040] 43—traction assembly 431—first mounting plate 432—wire clamp

[0041] 4321 Second mounting plate 4322 - Wire clamping cylinder 4323 - First pressure rod

[0042] 433 - first slide 434 - first lifting drive source 44 - toss assembly

[0043] 441 - second loading plate 4411 - front part 4412 - rear part

[0044] 442—tank body 443—inner support 4431—feeding section

[0045] 4432—middle section 4433—discharging section 444—second slide

[0046] 445 - second lifting drive source 45 - wire cutting assembly 451 - second bracket

[0047] 452—wire pressing piece 4521—wire plate 45211—wire trough

[0048] 4522—Second pressing rod 4523—Second pressing rod driving source 4524—Upper pressing plate

[0049] 453—Shearing piece 4531—Lower cutting knife 4532—Upper cutting knife

[0050] 4533—upper cutter driving member 100—battery cell. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0052] See also Figure 1-1 to Figure 1-2 , a battery cell welding machine of the present invention comprises a first bracket 1, a welding table 2, a welding device 3 and a wire supply device 4;

[0053] The soldering station 2 is used to carry the external battery cell 100. The soldering station 2 moves horizontally relative to the first bracket 1. The welding device 3 is arranged on the first bracket 1 and is located directly above the soldering station 2.

[0054] The wire feeding device 4 includes a material coil rack 41, a guide rail 42, a traction assembly 43, a wire support assembly 44 and a wire cutting assembly 45. The guide rail 42 is arranged parallel to the welding table 2. The traction assembly 43 is slidably connected to the guide rail 42. The wire support assembly 44 is arranged on the guide rail 42. The wire cutting assembly 45 is arranged between the traction assembly 43 and the wire support assembly 44. The wire cutting assembly 45 is arranged between the welding device 3 and the wire support assembly 44.

[0055] The coil rack 41 is used to carry the external welding wire coil, the traction assembly 43 clamps the original end of the external welding wire coil and pulls it out, the body of the external welding wire coil slides along the wire supporting assembly 44, the wire cutting assembly 45 cuts the pulled welding wire to form welding wire segments and a new end of the welding wire coil, the welding device 3 welds the cut welding wire segments to the external battery cell 100 placed on the welding station 2, and the wire supporting assembly 44 is used to support the original end of the external welding wire coil or the new end of the welding wire coil.

[0056] Specifically, in this embodiment, the external battery cells 100 in series are placed on the upper surface of the welding table 2, the traction component 43 and the wire support component 44 are both slidably connected to the guide rail 42, the wire support component 44 is close to the coil rack 41, and the position of the wire support component 44 on the guide rail 42 is adjusted according to different production requirements. The traction component 43 slides along the guide rail 42, and the wire cutting component 45 is in a stationary state relative to the guide rail 42. The wire cutting component 45 is located between the traction component 43 and the wire support component 44 and is arranged close to the wire support component 44. The welding device 3 is arranged on the first bracket 1 and is located directly above the welding table 2. The wire cutting component 45 is located between the welding device 3 and the wire support component 44. Preferably, the wire cutting component 45 is arranged at a parallel distance from the first bracket 1, and the coil rack 41 is provided with a plurality of rotating shaft components, each of which is used to carry an external welding wire coil. In the initial state, the original end of each welding wire coil passes through the wire support component 44 and the wire cutting component 45, and then the traction component 4 3 clamps a number of original ends of the welding wires and simultaneously pulls out a preset length, the main body of the welding wire slides on the wire support assembly 44, and then the wire cutting assembly 45 cuts the multiple welding wires into welding wire segments of preset length, so that the welding wire segments are separated from the external welding wire coils, and at the same time forms a new end of the welding wire coil, and the welding wire segments are transported to the upper surface of the external battery cell 100 for welding, and the new end of the external welding wire coil stays on the wire support assembly 44. When the welding of two adjacent battery cells 100 is completed, the welding station 2 moves, so that the next group of adjacent two battery cells 100 to be welded moves to the bottom of the welding device 3, and the pulling assembly 43 clamps the new end of the wire coil located at the wire support assembly 44 again and pulls it out, the wire cutting assembly 45 shears the pulled welding wire, and the welding device 3 welds the newly cut welding wire segments and the battery cell 100 to complete the processing, and the newly formed welding wire ends are supported by the wire support assembly 44, and the above steps are repeated to complete the string welding production requirements of multiple battery cells 100.

[0057] By setting up a wire supply device 4 composed of a material coil rack 41, a guide rail 42, a traction assembly 43, a wire support assembly 44 and a wire cutting assembly 45, the wire cutting assembly 45 is located between the traction assembly 43 and the wire support assembly 44, the welding table 2 moves horizontally relative to the first bracket 1, the welding device 3 is arranged on the first bracket 1, the wire cutting assembly 45 is located between the welding device 3 and the wire support assembly 44, and the end of the external welding wire coil is always located in the wire support assembly 44, which is convenient for repeated clamping of the traction assembly 43, and the rapid welding wire processing requirements are achieved while meeting the high frequency wire supply demand, thereby improving production efficiency and reducing energy consumption.

[0058] See also Figure 4-1The soldering station 2 includes a slide 20, a support 21, a heat insulating member 22, a bottom plate 23, a first material carrier 24, a soldering station driving source 25 and a heating member. The soldering station driving source 25 is arranged on the slide 20 and drives the support 21 to slide along the slide 20. The heat insulating member 22 is arranged on the support 21 so that the bottom plate 23 and the support 21 are arranged at a distance. The first material carrier 24 is arranged on the bottom plate 23. The heating member is arranged on the first material carrier 24. The first material carrier 24 is used to carry external battery cells 100. Preferably, the bottom plate 23 is made of marble material, so that the bottom plate 23 has the characteristics of large weight and high hardness, which improves the stability of the first material carrier 24 in the working state. The heating member (not shown) is arranged on the first material carrier 24 so that the first material carrier 24 is in the working process. During the welding process, the external battery cell 100 is heated to improve the controllability of the welding quality between the welding wire and the battery cell and shorten the welding wire processing time. Preferably, a plurality of transverse channels and a plurality of longitudinal channels are processed on the first carrier plate 24, and the outlet of the longitudinal channel is located on the upper surface of the first carrier plate 24. The longitudinal channel is connected to the transverse channel, and the transverse channel is connected to the external heating medium, so that the temperature of the upper surface of the first carrier plate 24 reaches a preset value, thereby improving production efficiency. The number of heat insulating members 22 is multiple, and the distance between two adjacent heat insulating members 22 is set to reduce heat loss. The welding table driving source 25 is a servo motor structure, which drives the support body 21 to move horizontally along the slide 20, so that the battery cells 100 to be welded are moved to the bottom of the welding device 3 in turn, so as to realize the processing requirements of rapid welding and improve production efficiency.

[0059] See also Figure 4-2 The welding device 3 includes a first jig 31, a second jig 32, a laser welding assembly 33, a first driving member 34 and a second driving member 35. The first driving member 34 is arranged on the first bracket 1 and drives the first jig 31 to rise and fall. The second driving member 35 is arranged on the first bracket 1 and drives the second jig 32 to rise and fall. The laser welding assembly 33 is located between the first jig 31 and the second jig 32. The horizontal distance between the first jig 31 and the second jig 32 is adjustable. The first driving member 34 drives the first jig 31 to rise and fall. The second driving member 35 drives the second jig 32 to rise and fall. The first jig 31 and the second jig 32 are independent structures and rise and fall respectively. When the number of battery cells 100 to be welded is an even number, the first jig 31 and the second jig 32 descend at the same time to press the battery cells 100 against the surface of the welding table 2 respectively, so as to ensure the quality stability of the welding process. When the number of battery cells 100 to be welded is an odd number, the first jig 31 or the second jig 32 descends to fix the single battery cell to meet different processing requirements. According to the specification requirements of the battery cells, the horizontal spacing between the first jig 31 and the second jig 32 is manually adjusted to achieve operational flexibility.

[0060] See also Figure 2-1 to Figure 2-6The traction assembly 43 includes a first mounting plate 431, a wire clamping member 432 and a third driving member. The third driving member drives the first mounting plate 431 to move. The wire clamping member 432 is arranged on the first mounting plate 431. The wire clamping member 432 includes a second mounting plate 4321, a wire clamping cylinder 4322 and a first pressure rod 4323. The second mounting plate 4321 is arranged on the first mounting plate 431. The wire clamping cylinder 4322 is arranged on the second mounting plate 4321 and drives the first pressure rod 4323 to swing so that the first pressure rod 4323 presses the end of the external welding wire coil on the second mounting plate 4321. The third driving member includes a first slide 433, a first horizontal driving source (not shown), and a first lifting driving source 434. The first horizontal driving source drives the first slide 433 along the guide rail 42 Horizontal movement, the first lifting drive source 434 is arranged on the first slide seat 433 and drives the first mounting plate 431 to lift and lower, that is, to realize the lifting and lowering movement and horizontal movement of the wire clamping member 432, to realize the pulling out of the welding wire in the horizontal direction and the lifting and lowering in the vertical direction, so that the welding wire is transported to the surface of the external battery cell 100 located on the upper surface of the welding table 2. Preferably, the number of wire clamping cylinders 4322 is multiple, the number of first pressure rods 4323 is multiple, one wire clamping cylinder 4322 drives one first pressure rod 4323 to swing, and one first pressure rod 4323 presses a welding wire on the second mounting plate 4321. The setting of the second mounting plate 4321 is convenient for assembling several wire clamping cylinders 4322 and several first pressure rods 4323 first and then installing them on the first mounting plate 431, which is convenient for assembly and maintenance.

[0061] The wire supporting assembly 44 includes a second material carrier plate 441, a trough body 442, an inner supporting member 443 and a fourth driving member. The fourth driving member drives the second material carrier plate 441 to move. The trough body 442 is arranged along the width direction of the second material carrier plate 441 and penetrates the second material carrier plate 441. The inner supporting member 443 is arranged in the trough body 442. The original end of the external welding wire coil is clamped and pulled out by the traction assembly 43, and the main body of the welding wire slides in the trough body 442. The wire cutting assembly 45 cuts the pulled welding wire to form welding wire segments and new ends of the welding wire coil. The inner supporting member 443 supports the new end of the external welding wire coil. The fourth driving member includes a second slide 444, a second horizontal driving source (not shown), and a second lifting driving source 445. The second horizontal driving source drives the second slide 444 to move horizontally along the guide rail 42 for fine adjustment. The second lifting driving source 44 The second material carrier plate 441 is driven to rise and fall, that is, the second material carrier plate 441 cooperates with the wire clamping member 432 to move in the longitudinal and horizontal directions at the same time, so as to meet the production requirements. When the traction assembly 43 clamps a number of welding wire ends and simultaneously pulls out a preset length, the main body of the welding wire slides in the groove body 442, and then the wire cutting assembly 45 cuts the plurality of welding wires into welding wire segments of preset length, so that the welding wire segments are separated from the external welding wire coil, and a new end of the welding wire coil is formed at the same time. The second lifting driving source 445 drives the second material carrier plate 441 to fall so that the welding wire segments fall to the upper surface of the external battery cell 100 on the surface of the welding table 2, and the new end of the external welding wire coil stays on the inner supporting member 443 of the groove body 442. The inner supporting member 443 supports the new end of the welding wire coil, so that it is convenient for the traction assembly 43 to clamp the new end of the welding wire coil again when returning to the initial position, thereby shortening the production cycle and reducing energy consumption.

[0062] The inner support member 443 includes a feed section 4431, a middle section 4432 and a discharge section 4433 connected in sequence. The feed section 4431 is arranged close to the coil rack 41. The upper surface of the feed section 4431 is higher than the upper surface of the discharge section 4433. Preferably, the middle section 4432 is connected to the feed section 4431 and the discharge section 4433 in a concave arc shape. The end of the welding wire coil stays at the position of the discharge section 4433. The feed section 4431 supports the body of the welding wire coil to prevent the end of the welding wire coil from sliding out of the groove body 442. The concave arc-shaped middle section 4432 is arranged to further make the end of the welding wire coil fit into the inner support member 443 to enhance the supporting purpose.

[0063] The second loading plate 441 includes a front portion 4411 and a rear portion 4412, the thickness of the front portion 4411 is less than the thickness of the rear portion 4412, the front portion 4411 is arranged close to the traction assembly 43, and the groove body 442 is located at the front portion 4411 and the rear portion 4412, which is convenient for the traction assembly 43 to clamp the supported welding wire end, thereby facilitating production.

[0064] See also Figure 3-1 to Figure 3-4The wire cutting assembly 45 includes a second bracket 451, a wire pressing piece 452 and a shearing piece 453. The wire pressing piece 452 and the shearing piece 453 are both arranged on the second bracket 451 and located directly above the welding table 2. The wire pressing piece 452 is arranged close to the material support wire assembly 44. Preferably, the second bracket 451 is processed with a long through hole, and the long through hole is arranged along the thickness direction of the second bracket 451 and penetrates the second bracket 451. The wire pressing piece 452 passes through the long hole and is close to the shearing piece 453. When it is necessary to cut the welding wire, the wire pressing piece 452 first presses and fixes the welding wire, and then the shearing piece 453 shears the welding wire to form a welding wire segment of a preset length.

[0065] The wire pressing member 452 includes a wire plate 4521, a second pressure rod 4522 and a second pressure rod driving source 4523. The wire plate 4521 is arranged on the second bracket 451. The second pressure rod driving source 4523 drives the second pressure rod 4522 to approach or move away from the wire plate 4521 so that the external welding wire is pressed on the wire plate 4521 by the second pressure rod 4522. A plurality of wire grooves 45211 are processed on the guide plate 4521. One wire groove 45211 is used for one welding wire to pass through. The number of the second pressure rod 4522 is multiple, one A second pressure rod 4522 is located directly above a wire groove 45211, and there are multiple second pressure rod driving sources 4523. A second pressure rod driving source 4523 drives a second pressure rod 4522 to rise and fall, thereby achieving the purpose of the second pressure rod 4522 pressing a welding wire. Preferably, the wire pressing member 452 also includes an upper pressure plate 4524, and the upper pressure plate 4524 and the wire groove 45211 are arranged to form a channel for the welding wire to pass through. The upper pressure plate 4524 is arranged to prevent the welding wire from shifting during the traction process, thereby improving the stability of production quality.

[0066] The shearing piece 453 includes a lower cutter 4531, an upper cutter 4532 and an upper cutter driving piece 4533. The lower cutter 4531 is arranged on the second bracket 451. The upper cutter driving piece 4533 is arranged on the second bracket 451 and drives the upper cutter 4532 to move toward or away from the lower cutter 4531. The upper cutter driving piece 4533 adopts a structure in which a servo motor drives a cam to rotate, so that the upper cutter 4532 moves back and forth along the second bracket 451, so that the upper cutter 4532 cooperates with the lower cutter 4531 to achieve the purpose of cutting the welding wire.

[0067] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A battery cell welding machine, comprising a first bracket (1), characterized in that: It also includes a welding platform (2), a welding device (3) and a wire supply device (4); The welding platform (2) is used to carry an external battery cell (100), the welding platform (2) moves horizontally relative to the first bracket (1), and the welding device (3) is arranged on the first bracket (1) and is located directly above the welding platform (2); The wire supply device (4) comprises a material coil rack (41), a guide rail (42), a traction assembly (43), a wire support assembly (44) and a wire cutting assembly (45); the guide rail (42) is arranged in parallel with the welding platform (2); the traction assembly (43) is slidably connected to the guide rail (42); the wire support assembly (44) is arranged on the guide rail (42); the wire cutting assembly (45) is arranged between the traction assembly (43) and the wire support assembly (44); and the wire cutting assembly (45) is arranged between the welding device (3) and the wire support assembly (44); The coil rack (41) is used to carry an external welding wire coil, the pulling assembly (43) clamps the end of the external welding wire coil and pulls it out, the body of the external welding wire coil slides along the wire support assembly (44), the wire cutting assembly (45) cuts the pulled welding wire to form welding wire segments and a new end of the welding wire coil, the welding device (3) welds the cut welding wire segments to an external battery cell (100) placed on the welding table (2), and the wire support assembly (44) is used to support the new end of the welding wire coil; The traction assembly (43) comprises a first mounting plate (431), a wire clamping member (432) and a third driving member, wherein the third driving member drives the first mounting plate (431) to move, the wire clamping member (432) is arranged on the first mounting plate (431), the wire clamping member (432) comprises a second mounting plate (4321), a wire clamping cylinder (4322) and a first pressure rod (4323), the second mounting plate (4321) is arranged on the first mounting plate (431), the wire clamping cylinder (4322) is arranged on the second mounting plate (4321) and drives the first pressure rod (4323) to swing so that the first pressure rod (4323) presses the original end of the external welding wire coil or the new end of the welding wire coil on the second mounting plate (4321); The wire supporting assembly (44) comprises a second material carrier plate (441), a trough body (442), an inner supporting member (443) and a fourth driving member, wherein the fourth driving member drives the second material carrier plate (441) to move, the trough body (442) is arranged along the width direction of the second material carrier plate (441) and penetrates the second material carrier plate (441), the inner supporting member (443) is arranged in the trough body (442), the original end of the external welding wire coil or the new end of the welding wire coil is clamped and pulled out via the pulling assembly (43), the main body of the welding wire slides in the trough body (442), the wire cutting assembly (45) cuts the pulled welding wire into welding wire segments and the new end of the welding wire coil, and the inner supporting member (443) supports the new end of the external welding wire coil.

2. The battery cell welding machine according to claim 1, characterized in that: The soldering station (2) comprises a slide (20), a support body (21), a heat insulating member (22), a bottom plate (23), a first material carrier (24), a soldering station driving source (25) and a heating member. The soldering station driving source (25) is arranged on the slide (20) and drives the support body (21) to slide along the slide (20). The heat insulating member (22) is arranged on the support body (21) so that the bottom plate (23) and the support body (21) are spaced apart. The first material carrier (24) is arranged on the bottom plate (23). The heating member is arranged on the first material carrier (24). The first material carrier (24) is used to carry external battery cells (100).

3. The battery cell welding machine according to claim 1, characterized in that: The welding device (3) comprises a first jig (31), a second jig (32), a laser welding assembly (33), a first driving member (34) and a second driving member (35); the first driving member (34) is arranged on the first bracket (1) and drives the first jig (31) to rise and fall; the second driving member (35) is arranged on the first bracket (1) and drives the second jig (32) to rise and fall; the laser welding assembly (33) is located between the first jig (31) and the second jig (32); and the horizontal spacing between the first jig (31) and the second jig (32) is adjustable.

4. The battery cell welding machine according to claim 1, characterized in that: The inner support member (443) comprises a feed section (4431), a middle section (4432) and a discharge section (4433) which are connected in sequence. The feed section (4431) is arranged close to the material roll rack (41), and the upper surface of the feed section (4431) is higher than the upper surface of the discharge section (4433).

5. The battery cell welding machine according to claim 1, characterized in that: The second loading plate (441) includes a front portion (4411) and a rear portion (4412), the thickness of the front portion (4411) is smaller than the thickness of the rear portion (4412), the front portion (4411) is arranged close to the traction assembly (43), and the trough (442) is located at the front portion (4411) and the rear portion (4412).

6. The battery cell welding machine according to claim 1, characterized in that: The wire cutting assembly (45) comprises a second bracket (451), a wire pressing piece (452) and a shearing piece (453); the wire pressing piece (452) and the shearing piece (453) are both arranged on the second bracket (451) and located directly above the welding platform (2); the wire pressing piece (452) is arranged close to the wire supporting assembly (44).

7. The battery cell welding machine according to claim 6, characterized in that: The wire pressing member (452) comprises a wire plate (4521), a second pressure rod (4522) and a second pressure rod driving source (4523); the wire plate (4521) is arranged on the second bracket (451); the second pressure rod driving source (4523) drives the second pressure rod (4522) to approach or move away from the wire plate (4521) so that the external welding wire is pressed on the wire plate (4521) by the second pressure rod (4522).

8. The battery cell welding machine according to claim 6, characterized in that: The shearing member (453) comprises a lower cutter (4531), an upper cutter (4532) and an upper cutter driving member (4533); the lower cutter (4531) is arranged on the second bracket (451); the upper cutter driving member (4533) is arranged on the second bracket (451) and drives the upper cutter (4532) to move in a direction close to or away from the lower cutter (4531).

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