A welding dust collection mechanism for a battery module

Abstract

The application relates to a welding dust collection mechanism for a battery module, which comprises a quick-change connecting plate, a waste gas collecting cavity for collecting waste gas is arranged in the quick-change connecting plate, a cover plate is used for covering the waste gas collecting cavity to form a sealed cavity, a negative pressure air suction pipe is installed on the quick-change connecting plate, one end of the negative pressure air suction pipe is communicated to the waste gas collecting cavity, a plurality of floating assemblies are arranged on the quick-change connecting plate, dust copper nozzles are connected to the floating assemblies, the dust copper nozzles are used for absorbing dust in a battery welding process, an adapter pipe is communicated to the dust copper nozzles at one end, and the other end of the adapter pipe is communicated to the waste gas collecting cavity. The welding dust collection mechanism for the battery module realizes optimized dust collection paths, compact waste gas collecting cavity structure, high space utilization rate, high safety coefficient, high model changing efficiency and reduced cost, and the dust collecting cavity and the dust collection interface make the structure compact, the safety coefficient high and the model changing efficiency improved.

Description

Technical Field

[0001] This invention relates to the field of new energy battery production technology, and in particular to a welding dust extraction mechanism for battery modules. Background Technology

[0002] Since the beginning of the 21st century, the international new energy market has continued to grow, accompanied by the continuous expansion of the new energy battery market. Influenced by the international environment, the domestic new energy electric vehicle market has also received significant support. As a core component of new energy electric vehicles, lithium-ion battery packs are facing increasingly stringent requirements.

[0003] In the production process of new energy batteries, the cell terminals and contacts of the battery module need to be pressed tightly together and then welded. However, the following problems may occur during the welding process:

[0004] 1. In the battery module assembly production line, the original dust collection structure often suffers from improper operation by production personnel during model changeovers, resulting in the dust collection steel wire hose not being locked and falling off, which leads to short circuits in the battery module cells and causes fire accidents.

[0005] 2. The original stainless steel vacuum cleaner hose was not smoothly bent. Dust could not be smoothly extracted from the welded joints with bends. It accumulated at the bends and even formed powdery lumps, causing blockages. If it fell on the surface of the battery cell terminals, it could even cause a deflagration during welding.

[0006] 3. The original two rows of stainless steel suction pipes require more steps to change, and they are located at the limit position of the rangefinder servo mechanism. Increasing the stroke of the servo module would not only make the structure bulky, but also increase the cost. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the problems in the prior art where dust is easily generated during the welding process, welding fumes and metal powder are easy to clog, making it impossible to observe the internal condition of the dust removal mechanism, affecting welding quality and welding safety; the changeover time is long and the flexible hose without a step at the interface is easy to fall downwards, posing a certain risk of short circuit and fire.

[0008] To solve the above-mentioned technical problems, the present invention provides a welding dust collection mechanism for battery modules, comprising: a quick-change connecting plate as a supporting component, wherein the quick-change connecting plate is provided with a waste gas collection chamber for collecting waste gas; a cover plate, which is locked to the quick-change connecting plate by fasteners, and the cover plate is used to cover the waste gas collection chamber to form a sealed cavity; a negative pressure suction pipe, one end of which is installed on the quick-change connecting plate, and the other end of the negative pressure suction pipe installed on the quick-change connecting plate is connected to the waste gas collection chamber; a floating assembly, which is configured in several parts, and the floating assembly is disposed on the quick-change connecting plate, wherein a dust suction copper nozzle is connected to the floating assembly, and the dust suction copper nozzle is used to absorb dust during battery welding; and a transfer pipe, one end of which is connected to the dust suction copper nozzle, and the other end of the transfer pipe is connected to the waste gas collection chamber. The welding dust collection mechanism for battery modules of the present invention optimizes the dust collection path, has a compact manifold structure, high space utilization, high safety factor, high changeover efficiency, and reduces costs; the dust collection manifold and dust collection interface make the structure compact, increase the safety factor, and improve the changeover efficiency.

[0009] In one embodiment of the present invention, the quick-change connecting plate is rectangular and has a plurality of through holes. The plurality of through holes and a plurality of floating components are arranged in a one-to-one correspondence, and the dust suction nozzle is connected to the through holes.

[0010] In one embodiment of the present invention, the exhaust gas manifold is a rectangular groove structure and is located on one end face of the quick-change connecting plate. A rectangular groove is provided on the end face of the quick-change connecting plate, and the rectangular groove communicates with the exhaust gas manifold. A sealing ring mounting groove is provided on the bottom surface of the rectangular groove, and a sealing ring is provided in the sealing ring mounting groove. The cover plate is a rectangular flat plate and is disposed in the rectangular groove. The cover plate contacts the sealing ring to achieve a seal.

[0011] In one embodiment of the present invention, the negative pressure suction pipe is a right-angle bend, and one end of the negative pressure suction pipe extending out of the quick-change connecting plate is connected to a dust suction interface. An inclined transition pipe is provided at the right-angle bend of the negative pressure suction pipe, and the angle between the inclined transition pipe and the negative pressure suction pipe located at one end of the quick-change connecting plate is an obtuse angle.

[0012] In one embodiment of the present invention, the floating component includes a floating block, a fixed mounting block, several bolts, several springs, and a gas pipe. The quick-change connecting plate is provided with several rectangular mounting slots, and the several rectangular mounting slots and several through holes are arranged in a one-to-one correspondence. The rectangular mounting slots and the through holes are connected. The floating block is a rectangular body and is installed in the rectangular mounting slot. The bottom surface of the rectangular mounting slot is provided with several grooves. The several bolts, several springs, and several grooves are arranged in a one-to-one correspondence. The head of the bolt is located in the groove, and the stud portion of the bolt passes through the fixed mounting block and the floating block. The spring is sleeved on the stud portion of the bolt and is located between the floating block and the fixed mounting block. The fixed mounting block is provided with a circular through hole. The gas pipe is arranged on the floating block. The lower end of the gas pipe is connected to the dust suction nozzle, and the upper end of the gas pipe is located in the circular through hole. The gas pipe is connected to the through hole through the circular through hole.

[0013] In one embodiment of the present invention, the floating block is provided with a channel, the two ends of which are respectively connected to a transfer pipe and a gas pipe, and the gas pipe, channel one and transfer pipe are connected.

[0014] In one embodiment of the present invention, the floating block is provided with a protective gas inlet channel, one end of which extends to the outer wall of the floating block to form an inlet interface, and the other end of which is connected to a dust suction copper nozzle. The protective gas inlet channel is used to allow nitrogen to enter during welding.

[0015] In one embodiment of the present invention, the vacuum nozzle includes a nozzle body and a nozzle mounting block. The nozzle mounting block is mounted on a floating block by screws. The nozzle body is disposed on the nozzle mounting block and is cylindrical. One end of the nozzle body near the welding position extends out of the nozzle mounting block, and the other end of the nozzle body is flush with the end face of the nozzle mounting block. An annular groove is provided on the end face of the nozzle mounting block. The nozzle body and the annular groove are coaxially arranged, and one end of the nozzle body is located inside the annular groove. A U-shaped groove is provided on the inner wall of the annular groove. One end of the protective gas inlet channel communicates with the U-shaped groove. The inner wall of the nozzle body at the end away from the welding position is set as a conical surface, and the diameter of the conical surface gradually increases on the side away from the welding position. A plurality of vent holes are provided on the side wall of the nozzle body at the end located inside the annular groove. The vent holes penetrate the nozzle body. The annular groove communicates with the interior of the nozzle body through the plurality of vent holes. The nozzle body is connected to a gas pipe.

[0016] In one embodiment of the present invention, the transfer pipe is a right-angle bend, one end of the transfer pipe is connected to a second mounting flange, the second mounting flange is locked to the side wall of the floating block by screws, one end of the transfer pipe is connected to a first channel, and the other end of the transfer pipe extends into the exhaust gas manifold.

[0017] In one embodiment of the present invention, a through hole three is provided on the bottom surface of the quick-change connecting plate where the exhaust gas manifold is located, and a groove four is provided on one side of the exhaust gas manifold. A support block is installed on the bottom surface of the exhaust gas manifold, and a pressing block is provided on the support block. A groove five is provided on the end face of the pressing block that contacts the support block. A limiting ring is provided in the groove five. A through hole four is provided on the pressing block, and a through hole five is provided on the support block. The limiting ring, through hole three, through hole four, and through hole five are coaxially arranged and connected. One end of the adapter pipe passes through through hole three and through hole five and is disposed in the limiting ring. The adapter pipe and the limiting ring can move relative to each other.

[0018] Compared with the prior art, the above-described technical solution of the present invention has the following advantages:

[0019] The welding dust extraction mechanism for battery modules described in this invention can centrally and uniformly extract and exhaust the waste gas and fumes generated during the welding process of new energy battery modules, reducing the space occupied by the dust extraction pipe. The travel distance of the ranging modules at both ends can also be shortened, and a viewing window is added to visualize the uniformly extracted fumes, facilitating the inspection of dust removal effectiveness and whether clogging occurs. Both the copper nozzle and the dust extraction pipe are insulated, preventing fires caused by short circuits in the battery cells in case of accidents. This achieves reduced material costs, energy savings, reduced changeover time, and ensures welding safety. Attached Figure Description

[0020] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0021] Figure 1 This is a schematic diagram of the welding dust extraction mechanism for the battery module in a preferred embodiment of the present invention. Figure 1 ;

[0022] Figure 2 This is a front view of the welding dust extraction mechanism for the battery module in a preferred embodiment of the present invention;

[0023] Figure 3 This is a preferred embodiment of the present invention. Figure 2 Sectional view along the AA direction;

[0024] Figure 4 This is a preferred embodiment of the present invention. Figure 2 Cross-sectional view along the BB direction;

[0025] Figure 5 This is a preferred embodiment of the present invention. Figure 2 Cross-sectional view along the CC direction;

[0026] Figure 6 This is a schematic diagram of the welding dust extraction mechanism for the battery module in a preferred embodiment of the present invention. Figure 2 ;

[0027] Figure 7 This is a bottom view of the welding dust extraction mechanism for the battery module in a preferred embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the floating component in a preferred embodiment of the present invention. Figure 1 ;

[0029] Figure 9 This is a schematic diagram of the structure of the floating component in a preferred embodiment of the present invention. Figure 2 ;

[0030] Figure 10 This is a schematic diagram of the structure of the vacuum nozzle in a preferred embodiment of the present invention;

[0031] Figure 11 This is a preferred embodiment of the present invention. Figure 4 A magnified view of a section at point D;

[0032] Figure 12 This is a diagram showing the gas flow direction during dust collection by the welding dust collection mechanism for the battery module in a preferred embodiment of the present invention.

[0033] Instruction manual drawing reference numerals: Quick-change connecting plate 1, exhaust gas manifold 11, through hole three 111, groove four 112, through hole one 12, rectangular groove one 13, sealing ring mounting groove one 14, sealing ring one 15, rectangular mounting groove 16, groove two 161, cover plate 2, negative pressure suction pipe 3, dust suction interface 31, inclined transition pipe 32, mounting flange one 33, floating assembly 4, floating block 41, channel one 411, protective gas inlet channel 412, insulating mica sheet 413 414 Rectangular groove 3, 42 Fixed mounting block, 421 Circular through hole 2, 43 Bolts, 44 Springs, 45 Gas pipe, 55 Dust suction copper nozzle, 50 Conical flare, 51 Copper nozzle body, 511 Conical surface, 512 Vent hole, 52 Copper nozzle mounting block, 521 Annular groove, 522 U-shaped groove, 6 Adapter pipe, 61 Mounting flange 2, 62 Support block, 621 Through hole 5, 63 Clamping block, 631 Through hole 4, 64 Groove 5, 65 Limiting ring. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0035] Reference Figure 1-7 As shown, the welding dust extraction mechanism for battery modules of the present invention includes several main components: a quick-change connecting plate 1, a cover plate 2, a negative pressure suction pipe 3, a floating assembly 4, a suction copper nozzle 5, and a connecting pipe 6; the quick-change connecting plate 1 serves as a supporting component, and the quick-change connecting plate 1 is provided with a waste gas manifold 11 for collecting waste gas; the cover plate 2 is locked to the quick-change connecting plate 1 by fasteners, and the cover plate 2 is used to cover the waste gas manifold 11 to form a sealed cavity; the negative pressure suction pipe 3, its One end is installed on the quick-change connecting plate 1, and one end of the negative pressure suction pipe 3 installed on the quick-change connecting plate 1 is connected to the exhaust gas manifold 11; a floating component 4 is provided, and the floating component 4 is provided on the quick-change connecting plate 1. The floating component 4 is connected to a dust suction copper nozzle 5, which is used to absorb dust during battery welding; a conversion pipe 6 is connected at one end to the dust suction copper nozzle 5, and the other end of the conversion pipe 6 is connected to the exhaust gas manifold 11.

[0036] In the above structure, the quick-change connecting plate 1 is rectangular and has several through holes 12. Each of the through holes 12 corresponds to one of the floating components 4, and the suction nozzle 5 communicates with the through holes 12. The through holes 12 extend through the quick-change connecting plate 1 along its height direction and are circular. The end of the through hole 12 away from the suction nozzle 5 is a tapered flare 50, and the diameter of the tapered flare 50 gradually increases along the direction away from the suction nozzle 5.

[0037] In the above structure, the exhaust gas manifold 11 is a rectangular groove structure, and the exhaust gas manifold 11 is located on one end face of the quick-change connecting plate 1. The end face of the quick-change connecting plate 1 is provided with a rectangular groove 13, which is connected to the exhaust gas manifold 11. The bottom surface of the rectangular groove 13 is provided with a sealing ring mounting groove 14, and a sealing ring 15 is provided in the sealing ring mounting groove 14. The cover plate 2 is a rectangular flat plate, and the cover plate 2 is set in the rectangular groove 13. The cover plate 2 contacts the sealing ring 15 to achieve a seal. The cross-sectional area of ​​the rectangular groove 13 is larger than that of the exhaust gas manifold 11, and the rectangular cross-section of the rectangular groove 13 is concentric with that of the exhaust gas manifold 11. When the cover plate 2 is placed in the rectangular groove 13, the cover plate 2 covers the rectangular cross-section of the exhaust gas manifold 11, thus ensuring that the exhaust gas manifold 11 is a sealed exhaust gas collection chamber. Preferably, the cover plate 2 is locked to the quick-change connecting plate 1 by several screws. The cover plate 2 is made of transparent material. By making the cover plate 2 transparent, it is convenient to see the situation inside the exhaust gas manifold 11.

[0038] In the above structure, the negative pressure suction pipe 3 is a right-angle bend. One end of the negative pressure suction pipe 3 extending out of the quick-change connecting plate 1 is connected to a dust suction interface 31. An inclined transition pipe 32 is provided at the right-angle bend of the negative pressure suction pipe 3, and the angle between the inclined transition pipe 32 and the end of the negative pressure suction pipe 3 located on the quick-change connecting plate 1 is an obtuse angle. The inclined transition pipe 32 creates an inclined transition at the right-angle bend of the negative pressure suction pipe 3, eliminating the right-angle bend and preventing dust from accumulating and clogging the negative pressure suction pipe 3. A mounting flange 33 is provided on the outer wall of the negative pressure suction pipe 3. The mounting flange 33 is screwed onto the outer wall of the quick-change connecting plate 1, thereby fixing the negative pressure suction pipe 3 onto the quick-change connecting plate 1. Preferably, the negative pressure suction pipe 3 is a round pipe.

[0039] Reference Figure 8 , 9 As shown, the floating component 4 includes a floating block 41, a fixed mounting block 42, several bolts 43, several springs 44, and a gas pipe 45. The quick-connect plate 1 has several rectangular mounting slots 16, each corresponding to a number of through holes 12, and the rectangular mounting slots 16 and through holes 12 are connected. The floating block 41 is rectangular and is installed within the rectangular mounting slot 16. The bottom surface of the rectangular mounting slot 16 has several recesses 161, and the bolts 43, springs 44, and recesses 161 are corresponding to each other. The head of bolt 43 is located in groove 161, and the stud portion of bolt 43 passes through the fixed mounting block 42 and the floating block 41. Spring 44 is sleeved on the stud portion of bolt 43 and is located between the floating block 41 and the fixed mounting block 42. The fixed mounting block 42 has a circular through hole 421. Gas pipe 45 is located on the floating block 41. The lower end of gas pipe 45 is connected to the suction nozzle 5, and the upper end of gas pipe 45 is located in the circular through hole 421. Gas pipe 45 is connected to through hole 12 through the circular through hole 421. The cross-section of the gas pipe 45 near the through hole 12 is circular, and the end of gas pipe 45 near the suction nozzle 5 is tapered, with the diameter of the tapered end of gas pipe 45 decreasing to correspond to the diameter of the suction nozzle 5. After the suction nozzle 5 is pressed into the welding position, the upward pressure on the suction nozzle 5 causes the floating block 41 to compress the spring 44 upward, which in turn causes the head of the bolt 43 to move upward in the groove 161. At the same time, the relative displacement between the gas pipe 45 and the circular through hole 421 occurs. During processing and installation, it is necessary to ensure that the gas pipe 45 and the circular through hole 421 are coaxially set.

[0040] In the above structure, the floating block 41 is provided with a channel 411, the two ends of which are connected to the transfer pipe 6 and the gas pipe 45 respectively, and the gas pipe 45, the channel 411, and the transfer pipe 6 are connected. After the dust is sucked in by the suction nozzle 5, it enters the gas pipe 45. Since the transfer pipe 6 is connected to the exhaust gas manifold 11 and is under negative pressure, the dust flows through the transfer pipe 6 into the exhaust gas manifold 11 and is collected. The floating block 41 is provided with a protective gas inlet channel 412. One end of the protective gas inlet channel 412 extends to the outer wall of the floating block 41 to form an inlet interface, and the other end of the protective gas inlet channel 412 is connected to the suction nozzle 5. The protective gas inlet channel 412 is used to introduce nitrogen gas during welding. An insulating mica sheet 413 is provided on the outer wall of the floating block 41. The insulating mica sheet 413 has a right-angled cross-section. The floating block 41 is rectangular. One right-angled side of the insulating mica sheet 413 wraps around the outer wall of the floating block 41, and the other right-angled side wraps around the bottom surface of the floating block 41, which is the surface of the floating block 41 that contacts the battery during vacuuming. The insulating mica sheet 413 prevents accidental short circuits with the battery. Nitrogen gas is delivered to the welding position through the protective gas inlet channel 412 to prevent oxidation and blackening of the weld pool.

[0041] Reference Figure 10As shown, the vacuum nozzle 5 includes a nozzle body 51 and a nozzle mounting block 52. The nozzle mounting block 52 is mounted on the floating block 41 by screws. The nozzle body 51 is mounted on the nozzle mounting block 52 and is cylindrical. One end of the nozzle body 51 near the welding position extends out of the nozzle mounting block 52, and the other end of the nozzle body 51 is flush with the end face of the nozzle mounting block 52. An annular groove 521 is provided on the end face of the nozzle mounting block 52. The nozzle body 51 and the annular groove 521 are coaxially arranged, and one end of the nozzle body 51 is located inside the annular groove 521. The inner wall of the annular groove 521 is provided with a U-shaped groove 522. One end of the protective gas inlet channel 412 is connected to the U-shaped groove 522. The inner wall of the copper nozzle body 51 at the end away from the welding position is set as a conical surface 511, and the diameter of the conical surface 511 gradually increases towards the side away from the welding position. The side wall of the copper nozzle body 51 at the end located inside the annular groove 521 is provided with several vent holes 512. The vent holes 512 penetrate the copper nozzle body 51. The annular groove 521 is connected to the interior of the copper nozzle body 51 through several vent holes 512. The copper nozzle body 51 is connected to the gas pipe 45. The bottom surface of the floating block 41 is provided with a rectangular groove 3 414. The copper nozzle mounting block 52 is rectangular and is installed in the rectangular groove 3 414. The vent holes 512 are round holes and are inclined along the axial direction of the copper nozzle body 51, and are gradually inclined outward from the inside. Nitrogen gas, supplied through the protective gas inlet channel 412, enters the U-shaped groove 522 and gradually flows into the annular groove 521. It then enters the copper nozzle body 51 through several vent holes 512 to provide protection.

[0042] In the above structure, the transition pipe 6 is a right-angle bend, one end of the transition pipe 6 is connected to the second mounting flange 61, the second mounting flange 61 is locked to the side wall of the floating block 41 by screws, one end of the transition pipe 6 is connected to the first channel 411, and the other end of the transition pipe 6 extends into the exhaust gas manifold 11.

[0043] Reference Figure 11As shown, the quick-connect plate 1 where the exhaust gas manifold 11 is located has a through hole 3 111 on its bottom surface. The through hole 3 111 has a groove 4 112 on one side of the exhaust gas manifold 11. A support block 62 is installed on the bottom surface of the exhaust gas manifold 11. A clamping block 63 is provided on the support block 62. A groove 5 64 is provided on the end face of the clamping block 63 that contacts the support block 62. A limiting ring 65 is provided in the groove 5 64. The clamping block 63 has a through hole 4 631. The support block 62 has a through hole 5 621. The limiting ring 65, through hole 3 111, through hole 4 631 and through hole 5 621 are coaxially arranged and connected. One end of the adapter pipe 6 passes through through hole 3 111 and through hole 5 621 and is located in the limiting ring 65. The adapter pipe 6 and the limiting ring 65 can move relative to each other. Since the change in the position of the floating block 41 will cause the transfer pipe 6 to move, the end of the transfer pipe 6 located inside the limiting ring 65 is set to be movable, so that when the transfer pipe 6 moves, the transfer pipe 6 and the limiting ring 65 can move relative to each other to avoid interference.

[0044] The direction of gas flow for dust extraction during the application of the welding dust extraction mechanism for battery modules of the present invention is referenced. Figure 12 As shown, the Z-axis servo, carrying the battery module, is pressed downwards by the welding and dust collection mechanism. The compression compatibility of the floating component 4 tightly presses the battery module's cell terminals and contacts together. After distance compensation, welding begins. During welding, protective gas is blown while the vacuum cleaner simultaneously collects dust. The dust and exhaust gas first pass through the exhaust gas manifold 11 and then enter the internal dust removal channel, finally being drawn to the main dust collection pipe through the negative pressure suction pipe 3. The exhaust gas manifold 11 integrates the original two pairs of stainless steel suction pipes on the outside into the inside of the copper nozzle, leaving only one pair on the outside and avoiding distance measurement space. This makes the structure more compact while ensuring welding safety, achieving the desired effect.

[0045] This battery module uses a welding dust extraction mechanism. By improving the dust extraction structure, a series of safety accidents can be avoided and the cost can be reduced; space utilization, safety factor, production changeover efficiency, and cost reduction can be achieved.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A welding dust extraction mechanism for battery modules, characterized in that: include, A quick-change connecting plate serves as a support component, and the quick-change connecting plate is provided with an exhaust gas manifold for collecting exhaust gas. The cover plate is fastened to the quick-connect plate by fasteners, and the cover plate is used to cover the exhaust gas manifold to form a sealed cavity; The negative pressure suction pipe has one end installed on the quick-change connecting plate, and the other end of the negative pressure suction pipe installed on the quick-change connecting plate is connected to the exhaust gas manifold. A floating assembly is provided, which is configured in several parts and is disposed on a quick-change connection plate. A dust suction copper nozzle is connected to the floating assembly, which is used to absorb dust during the battery welding process. A connecting pipe, one end of which is connected to a vacuum nozzle, and the other end of which is connected to an exhaust gas manifold; The floating block is provided with a protective gas inlet channel. One end of the protective gas inlet channel extends to the outer wall of the floating block to form an inlet interface, and the other end of the protective gas inlet channel is connected to the dust suction copper nozzle. The protective gas inlet channel is used to introduce nitrogen gas during welding. The quick-change connecting plate is rectangular and has several through holes. The several through holes and several floating components are arranged in a one-to-one correspondence, and the dust suction nozzle is connected to the through holes. The floating assembly includes a floating block, a fixed mounting block, several bolts, several springs, and a gas pipe. The quick-change connecting plate has several rectangular mounting slots, and the rectangular mounting slots and several through holes are arranged in a one-to-one correspondence. The rectangular mounting slots and through holes are connected. The floating block is a rectangular body. The bottom surface of the rectangular mounting slots has several grooves. The bolts, springs, and grooves are arranged in a one-to-one correspondence. The head of the bolt is located in the groove, and the stud portion of the bolt passes through the fixed mounting block and the floating block. The spring is sleeved on the stud portion of the bolt and is located between the floating block and the fixed mounting block. The fixed mounting block has a circular through hole. The gas pipe is set on the floating block. The lower end of the gas pipe is connected to the dust suction nozzle, and the upper end of the gas pipe is located in the circular through hole. The circular through hole and the through hole are connected through the gas pipe. The vacuum nozzle includes a nozzle body and a nozzle mounting block. The nozzle mounting block is mounted on a floating block with screws. The nozzle body is mounted on the nozzle mounting block and is cylindrical. One end of the nozzle body near the welding position extends out of the nozzle mounting block, and the other end of the nozzle body is flush with the end face of the nozzle mounting block. An annular groove is provided on the end face of the nozzle mounting block. The nozzle body and the annular groove are coaxially arranged, and one end of the nozzle body is located inside the annular groove. A U-shaped groove is provided on the inner wall of the annular groove. One end of the protective gas inlet channel communicates with the U-shaped groove. The inner wall of the nozzle body at the end away from the welding position is set as a conical surface, and the diameter of the conical surface gradually increases on the side away from the welding position. Several vent holes are provided on the side wall of the nozzle body at the end located inside the annular groove. The vent holes penetrate the nozzle body. The annular groove communicates with the interior of the nozzle body through the several vent holes. The nozzle body is connected to a gas pipeline.

2. The welding dust extraction mechanism for battery modules according to claim 1, characterized in that: The exhaust gas manifold is a rectangular groove structure and is located on one end face of the quick-change connecting plate. A rectangular groove is provided on the end face of the quick-change connecting plate, and the rectangular groove is connected to the exhaust gas manifold. A sealing ring mounting groove is provided on the bottom surface of the rectangular groove, and a sealing ring is provided in the sealing ring mounting groove. The cover plate is a rectangular flat plate and is set in the rectangular groove. The cover plate contacts the sealing ring to achieve a seal.

3. The welding dust extraction mechanism for battery modules according to claim 1, characterized in that: The negative pressure suction pipe is a right-angle bend. One end of the negative pressure suction pipe extending out of the quick-change connecting plate is connected to a dust suction interface. An inclined transition pipe is provided at the right-angle bend of the negative pressure suction pipe. The angle between the inclined transition pipe and the negative pressure suction pipe located at one end of the quick-change connecting plate is an obtuse angle.

4. The welding dust extraction mechanism for battery modules according to claim 1, characterized in that: The floating block is provided with a channel 1, the two ends of which are connected to a transfer pipe and a gas pipe, respectively, and the gas pipe, channel 1 and transfer pipe are connected.

5. The welding dust extraction mechanism for battery modules according to claim 4, characterized in that: The transfer pipe is a right-angle bend. One end of the transfer pipe is connected to a second mounting flange, which is locked to the side wall of the floating block by screws. One end of the transfer pipe is connected to a first channel, and the other end of the transfer pipe extends into the exhaust gas manifold.

6. The welding dust extraction mechanism for battery modules according to claim 1, characterized in that: The quick-connect plate containing the exhaust gas manifold has a through hole three on its bottom surface. The through hole three has a groove four on one side of the exhaust gas manifold. A support block is installed on the bottom surface of the exhaust gas manifold. A clamping block is provided on the support block. A groove five is provided on the end face of the clamping block that contacts the support block. A limiting ring is provided in the groove five. The clamping block has a through hole four. The support block has a through hole five. The limiting ring, through hole three, through hole four, and through hole five are coaxially arranged and connected. One end of the adapter pipe passes through through hole three and through hole five and is located in the limiting ring. The adapter pipe and the limiting ring can move relative to each other.

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