Automatic assembling and welding production line for negative electrode current collecting disc

Abstract

The invention discloses an automatic assembling and welding production line for a negative electrode confluence disc. The automatic assembling and welding production line comprises a station rotating disc provided with a plurality of sets of carriers, a cover plate body feeding station, a confluence disc feeding station, an assembling and detecting station, a welding station, a post-welding detecting station, an internal resistance detecting station and an unloading station. The cover plate body feeding station comprises a cover plate circulating conveying rail and a cover plate carrying mechanism. The confluence disc feeding station comprises a confluence disc circulating conveying rail and a confluence disc carrying mechanism. The assembly detection station comprises an image detection mechanism; the welding station comprises a laser welding mechanism; the post-welding detection station comprises a post-welding detection mechanism; the internal resistance detection station comprises an internal resistance detection mechanism; the unloading station comprises a good product conveying belt, an NG unloading belt and an unloading carrying mechanism. The efficient and automatic welding operation of the negative collector plate and the battery cover plate can be achieved, and operation is smooth and efficient. And various carrying positioning and transfer positioning are achieved, the pre-assembly precision of the negative electrode convergence disc and the cover plate body is guaranteed, and the welding quality is reliable and stable.

Description

Technical Field

[0001] The invention relates to an automated assembly welding production line for a negative electrode busbar, belonging to the technical field of welding assembly. Background Art

[0002] The power battery system (power battery PACK, battery pack) is the core energy source for providing driving power for new energy vehicles and is one of the most critical components of new energy vehicles. The power battery system is mainly composed of battery modules, electrical systems, thermal management systems, shells, BMS and other components. The battery modules, electrical systems, thermal management systems and BMS are packaged in the shell to form the main body of the power battery system.

[0003] Power batteries generally include cylindrical batteries and blade batteries. Regardless of whether they are cylindrical batteries or blade batteries, they all have a battery cover with electrodes. The battery cover assembly includes the assembly of the cover and the busbar, welding of the cover and the busbar, welding inspection, internal resistance inspection, helium inspection, film pasting and other operations.

[0004] At present, there is a negative battery cover, which is formed by welding the cover body and the negative busbar. The cover body is a disc, and the negative busbar includes a circular end and a connecting end connected to the circular end. The outer periphery of the circular end has a peripheral notch. Generally, a linear conveyor line or a rotary table is used for automated production line design. However, due to the structural differences between the cover body and the negative busbar, it is difficult to ensure relative assembly accuracy and welding quality. In addition, traditional welding is mostly a single-station precision positioning welding table, which cannot meet the needs of high-speed welding. At the same time, the products after traditional welding need to be tested separately by multiple testing equipment, and the welding assembly efficiency is low and the overall production cycle is long. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art. Aiming at the problems that the traditional negative busbar welding production line occupies a large space, has low efficiency and cannot guarantee the welding quality, an automated assembly welding production line for the negative busbar is proposed.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: An automated assembly welding production line for a negative busbar, used for assembly welding of a cover plate body and a negative busbar, wherein the cover plate body comprises a disc body with an eccentric hole, and the negative busbar comprises a circular ring end and a connecting end connected to the circular ring end, and the outer periphery of the circular ring end comprises an outer peripheral notch; The automated assembly and welding production line includes a station turntable with a plurality of assembly tools, a cover plate body loading station, a busbar loading station, an assembly inspection station, a welding station, a post-weld inspection station, an internal resistance inspection station, and a discharge station arranged in sequence along the rotation direction of the station turntable; The assembly tool comprises a carrier base, at least one assembly loading position provided on the carrier base and having a through passage, the assembly loading position comprises a disc body loading groove for limiting the position of the disc body, a busbar positioning portion for limiting the position of the negative busbar, the disc body loading groove is provided with an eccentric hole positioning portion matched with the eccentric hole position, the busbar positioning portion comprises a positioning groove for positioning the connection end, and a positioning pin for positioning and matching with the peripheral notch; The cover plate body loading station comprises a cover plate circulating conveying rail with a plurality of cover plate carriers, and a cover plate conveying mechanism for circulating between the cover plate carrier and the assembly carrier, the cover plate carrier is provided with a cover plate loading groove, and the cover plate loading groove is provided with an eccentric hole limiting portion matched with the eccentric hole position; The busbar loading station includes a busbar circulation conveyor rail with a plurality of busbar carriers, and a busbar transport mechanism for circulating between the busbar carrier and the assembly carrier, wherein the busbar carrier is provided with a contoured loading slot that is contoured to the negative busbar; The assembly inspection station includes an image detection mechanism for detecting the relative position of the cover plate body and the negative busbar on the assembly tool; The welding station includes a laser welding mechanism, and the laser welding mechanism includes a laser welding part for laser welding and an auxiliary crimping part with lifting displacement for auxiliary crimping of the negative busbar; The post-weld inspection station includes a post-weld inspection mechanism for post-weld image inspection; The internal resistance detection station includes an internal resistance detection mechanism, and the internal resistance detection mechanism includes a top conductive member with lifting displacement and a bottom conductive member with lifting displacement and penetrating the through channel; The unloading station includes a good product conveyor belt, an NG unloading belt, and an unloading and transporting mechanism for circulating between the good product conveyor belt and the assembly tool and between the NG unloading belt and the assembly tool.

[0007] Preferably, the cover plate conveying mechanism comprises a cover plate negative pressure picking end with linear displacement, lifting displacement and rotational displacement, and a visual guidance mechanism for visually guiding the deviation correction and loading, which is communicated with the cover plate conveying mechanism, is provided on the displacement path of the cover plate negative pressure picking end.

[0008] Preferably, a secondary positioning base for secondary positioning of the cover plate body is provided between the discharge end of the cover plate circulation conveying rail and the station turntable, and a secondary positioning groove is provided on the secondary positioning base; The cover plate conveying mechanism comprises a first cover plate negative pressure picking end for circulating between the cover plate circulating conveying rail and the secondary positioning base, and a second cover plate negative pressure picking end for circulating between the secondary positioning base and the station turntable; the first cover plate negative pressure picking end has linear displacement and lifting displacement; the second cover plate negative pressure picking end has linear displacement, lifting displacement and rotational displacement; The visual guiding mechanism is located on the turnover path of the negative pressure picking end of the cover plate between the secondary positioning base and the workstation turntable.

[0009] Preferably, the busbar transport mechanism includes a busbar picking portion with linear displacement and lifting displacement, the busbar picking portion includes at least two busbar negative pressure picking ends arranged at intervals, and a positioning and shaping fixture for secondary positioning and shaping is provided between the busbar circulation conveying rail and the workstation turntable, and the positioning and shaping fixture is provided with a positioning and shaping carrying groove arranged in the same shape as the negative electrode busbar.

[0010] Preferably, the good product conveyor belt comprises a finished product conveyor rail with a plurality of finished product peripheral transfer seats, and the finished product peripheral transfer seats are provided with finished product limiting loading grooves; The unloading and handling mechanism includes a finished product turnover part with linear displacement and lifting displacement. An angle adjustment mechanism is provided on the displacement path of the finished product turnover part. The angle adjustment mechanism includes an angle adjustment seat with rotational displacement. A finished product storage tank is provided on the angle adjustment seat.

[0011] Preferably, an automatic pallet supply device is provided at the loading end of the cover plate circulating conveyor rail, and the automatic pallet supply device includes an automatic pallet supply circulation part and a cover plate loading and unloading turnover mechanism for performing cover plate loading and unloading turnover between the automatic pallet supply circulation part and the cover plate circulating conveyor rail.

[0012] Preferably, a feed end of the manifold circulation conveyor rail is provided with a manifold supply device; The convergence plate supply device comprises a rotating plate with a plurality of convergence plate revolving seats, a convergence plate loading station, a convergence plate coding station, a convergence plate scanning station, and a convergence plate unloading station arranged in sequence along the direction of the rotating plate; The busbar loading station includes a busbar supply mechanism; The busbar coding station includes a laser marking mechanism for laser coding; The busbar scanning station includes a scanning detection station for scanning and detecting laser codes; The convergence plate unloading station includes an NG unloading mechanism and a qualified product flipping mechanism. The NG unloading mechanism includes an unloading cabin and an NG unloading turnover part for switching displacement between the unloading cabin and the convergence plate turnover seat; the qualified product flipping mechanism includes a negative convergence plate flipping part for picking up the negative convergence plate on the convergence plate turnover seat for flipping, and a qualified product turnover part for turnover between the negative convergence plate flipping part and the convergence plate circulation conveying rail.

[0013] Preferably, the convergence plate supply mechanism comprises a clip rotating plate having a plurality of convergence plate clips, and a material turnover mechanism for performing material turnover between a discharge end of the clip rotating plate and the convergence plate turnover seat.

[0014] The beneficial effects of the present invention are mainly reflected in: 1. It can realize efficient and automatic welding of negative busbar and battery cover, and the operation is smooth and efficient.

[0015] 2. With various loading and transfer positioning, the pre-assembly accuracy of the negative busbar and the cover body is guaranteed, the welding quality is reliable and stable, and the product qualification rate is significantly improved.

[0016] 3. The overall layout is compact and easy to arrange and promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a top view structural schematic diagram of an automated assembly welding production line for a negative busbar of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of an automated assembly welding production line for a negative busbar of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the assembly in the present invention.

[0020] Figure 4 It is a structural schematic diagram of the workstation turntable in the present invention.

[0021] Figure 5 It is a structural schematic diagram of the cover plate circulating conveyor rail in the present invention.

[0022] Figure 6 It is a structural schematic diagram of the cover plate conveying mechanism in the present invention.

[0023] Figure 7 It is a structural schematic diagram of the busbar circulation conveyor rail in the present invention.

[0024] Figure 8 It is a structural schematic diagram of the manifold transport mechanism in the present invention.

[0025] Fig. 9 It is a structural schematic diagram of the image detection mechanism in the present invention.

[0026] Fig.10 It is a structural schematic diagram of the laser welding mechanism in the present invention.

[0027] Fig.11 It is a structural schematic diagram of the post-weld detection mechanism in the present invention.

[0028] Fig.12 It is a structural schematic diagram of the internal resistance detection mechanism in the present invention.

[0029] Fig.13 It is a structural schematic diagram of the unloading and handling mechanism in the present invention.

[0030] Fig.14 It is a schematic structural diagram of the good product conveyor belt in the present invention.

[0031] Fig.15 It is a structural schematic diagram of the automatic tray supply device in the present invention.

[0032] Fig.16 It is a structural schematic diagram of the automated tray supply circulation unit in the present invention.

[0033] Fig.17 It is a structural schematic diagram of the cover plate material turnover mechanism in the present invention.

[0034] Fig.18 It is a structural schematic diagram of the busbar supply device in the present invention.

[0035] Fig.19 It is a structural schematic diagram of the magazine rotating disk in the present invention.

[0036] Fig. 20 It is a structural schematic diagram of the material turnover mechanism in the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0038] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the relevant inventions are shown in the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0039] The present invention provides an automated assembly welding production line for a negative busbar, such as Figure 1 and Figure 3 As shown, it is used for assembling and welding the cover body 100 and the negative bus plate 200. The cover body 100 includes a disc body with an eccentric hole, and the negative bus plate 200 includes a circular end 300 and a connecting end 400 connected to the circular end. The outer periphery of the circular end has an outer peripheral notch 500.

[0040] like Figures 1 to 14 As shown, the automated assembly and welding production line includes a station turntable 1 with a plurality of assembly tools 10, a cover body loading station 2, a busbar loading station 3, an assembly inspection station 4, a welding station 5, a post-weld inspection station 6, an internal resistance inspection station 7, and an unloading station 8, which are arranged in sequence along the rotation direction of the station turntable 1.

[0041] like Figure 3 As shown, the assembly vehicle 10 includes a carrier base 11, at least one assembly loading position 12 with a through channel arranged on the carrier base 11, the assembly loading position 12 includes a disc body loading groove 121 for limiting the loading disc body, and a busbar positioning portion 122 for limiting the negative busbar, the disc body loading groove 121 is provided with an eccentric hole positioning portion 1210 matched with the eccentric hole position, and the busbar positioning portion 122 includes a positioning groove 1221 for positioning the connection end, and a positioning pin 1222 for positioning and matching with the peripheral notch.

[0042] The cover plate body loading station 2 includes a cover plate circulating conveying rail 21 with a plurality of cover plate carriers 210, and a cover plate transporting mechanism 22 for circulation between the cover plate carriers and the assembly carriers. The cover plate carriers 210 are provided with cover plate loading grooves, and the cover plate loading grooves are provided with eccentric hole limiting parts matching the eccentric hole positions.

[0043] The bus loading station 3 includes a bus circulating conveyor track 31 with a plurality of bus carriers 310, and a bus transport mechanism 32 for circulation between the bus carriers and the assembly carriers. The bus carriers 310 are provided with contoured loading slots that are contoured to the negative bus.

[0044] The assembly inspection station 4 includes an image inspection mechanism 40 for inspecting the relative position between the upper cover plate body and the negative busbar of the assembly tool.

[0045] The welding station 5 includes a laser welding mechanism 50 , which includes a laser welding portion 501 for laser welding and an auxiliary crimping portion 502 with lifting displacement for auxiliary crimping of the negative busbar.

[0046] The post-weld inspection station 6 includes a post-weld inspection mechanism 60 for post-weld image inspection.

[0047] The internal resistance detection station 7 comprises an internal resistance detection mechanism 70 , and the internal resistance detection mechanism 70 comprises a top conductive member 701 with lifting displacement and a bottom conductive member 702 with lifting displacement and penetrating the through channel.

[0048] The unloading station 8 includes a good product conveyor belt 81, an NG unloading belt 82, and an unloading transport mechanism 83 for transferring between the good product conveyor belt and the assembly tool and between the NG unloading belt and the assembly tool.

[0049] Specific implementation process and principle description: During welding and assembly, the workstation turntable 1 carries several sets of loading tools 10 for workstation switching. The cover body is loaded at the cover body loading station 2, the negative busbar is pre-assembled at the busbar loading station, the relative position is detected at the assembly inspection station, the welding operation between the cover body and the negative busbar is carried out at the welding station, the welding is inspected at the post-weld inspection station after welding, and then classified and unloaded at the unloading station after passing the internal resistance inspection station.

[0050] Among them, when the cover body 100 and the negative bus plate 200 are pre-assembled and mounted, the disc body is limited and mounted through the disc body loading groove 121, and the eccentric hole positioning part 1210 is used to achieve precise alignment with the eccentric hole position of the disc body, and then the negative bus plate is mounted, and the positioning groove 1221 and the positioning pin 1222 cooperate to meet the mounting positioning accuracy of the negative bus plate, and the relatively overlapping welding parts between the cover body 100 and the negative bus plate 200 are reliably and accurately connected.

[0051] When the cover plate body loading station 2 is loading the cover plate body, the cover plate circulating conveyor rail 21 is used to carry the cover plate body through the cover plate carrier 210 to accurately feed the cover plate body, and the eccentric hole limiting part 2102 on its cover plate loading slot is used to achieve accurate positioning, and the cover plate handling mechanism 22 performs accurate material turnover.

[0052] When the busbar loading station 3 supplies the negative busbar, the busbar circulation conveyor rail 31 is used to supply the negative busbar with high position accuracy, and the contoured loading slot on the busbar carrier 310 is used for high-precision loading and conveying, and the busbar conveying mechanism 32 performs relatively high-precision position transfer. The pre-assembly alignment accuracy is improved.

[0053] When the laser welding mechanism 50 is in operation, the two pre-assembled workpieces are pressed against each other and maintained under pressure by the auxiliary pressing portion 502 , while the laser welding portion 501 performs corresponding welding operations.

[0054] After laser welding, a post-weld inspection is performed by the post-weld inspection mechanism 60 .

[0055] The internal resistance detection station 7 is performed by the internal resistance detection mechanism 70. Specifically, the bottom conductive member 702 is lifted through the through channel to achieve bottom conductive abutment, and the top conductive member 701 is pressed down to be conductive, so as to realize the internal resistance detection after conduction, and reset after the detection is completed.

[0056] When the unloading station 8 performs classified unloading, the unloading and transporting mechanism 83 picks up the materials and places them separately, and transfers them to the good product conveyor belt 81 and the NG unloading belt 82 according to the detection results.

[0057] In a specific embodiment, the cover plate conveying mechanism 22 includes a cover plate negative pressure picking end 220 with linear displacement, lifting displacement and rotational displacement. A visual guidance mechanism 23 for visually guiding the deviation correction and loading is provided on the displacement path of the cover plate negative pressure picking end and is communicated with the cover plate conveying mechanism.

[0058] Specifically, during the transfer process of the cover body 100 picked up by the cover negative pressure picking end 220, the visual guidance mechanism 23 collects the position influence and then adjusts the deviation to guide the loading and make the cover loading position more accurate.

[0059] In a specific embodiment, a secondary positioning base 24 for secondary positioning of the cover plate body is provided between the discharge end of the cover plate circulation conveying rail 21 and the station turntable, and a secondary positioning groove is provided on the secondary positioning base.

[0060] The cover plate transport mechanism 22 includes a first cover plate negative pressure picking end 221 for rotating between the cover plate circulating conveying rail and the secondary positioning base, and a second cover plate negative pressure picking end 222 for rotating between the secondary positioning base and the work station turntable; the first cover plate negative pressure picking end has linear displacement and lifting displacement; the second cover plate negative pressure picking end has linear displacement, lifting displacement and rotational displacement; the visual guidance mechanism is located on the turnover path of the cover plate negative pressure picking end between the secondary positioning base and the work station turntable.

[0061] Specifically, when feeding through the cover plate circulating conveyor rail 21, the cover plate body can provide materials within a certain error accuracy. The first cover plate negative pressure picking end 221 picks up the material and sends it to the secondary positioning groove for secondary positioning such as vibration, so that its relative position is adjusted. After adjustment, it is picked up by the second cover plate negative pressure picking end 222, and possible error fine-tuning is performed through the visual guidance mechanism, thereby ensuring the feeding accuracy of the cover plate body.

[0062] In a specific embodiment, the busbar transport mechanism 32 includes a busbar picking portion 320 with linear displacement and lifting displacement. The busbar picking portion 320 includes at least two busbar negative pressure picking ends 3200 that are spaced apart and have independent lifting displacements. A positioning and shaping fixture 33 for secondary positioning and shaping is provided between the busbar circulation conveying rail and the workstation turntable. The positioning and shaping fixture 33 is provided with a positioning and shaping loading groove that is shaped like the negative electrode busbar.

[0063] Specifically, the negative electrode busbar is a sheet structure, which may be tortuous in itself or during the loading process. The positioning and shaping fixture 33 can be used to achieve top pressure shaping and ensure its position in the positioning and shaping slot, thereby ensuring reliable loading position accuracy.

[0064] In a specific embodiment, the good product conveyor belt includes a finished product conveyor rail 812 with a plurality of finished product peripheral transfer seats 811, and the finished product peripheral transfer seats are provided with finished product limiting loading grooves, so that high-precision feeding of the finished product to the next link can be achieved.

[0065] The unloading and handling mechanism 83 includes a finished product turnover part 830 with linear displacement and lifting displacement. An angle adjustment mechanism 84 is provided on the displacement path of the finished product turnover part. The angle adjustment mechanism includes an angle adjustment seat with rotational displacement, and a finished product storage tank is provided on the angle adjustment seat.

[0066] Specifically, Figure 1 As shown, due to space limitations, the material angle of the unloading station 8 is inclined, and direct classification unloading is not conducive to the conveying and supplying of good products or the loading and unloading operation.

[0067] To address this situation, an angle adjustment mechanism 84 is designed. The deflected material picked up by the unloading and transporting mechanism 83 is placed in the finished product storage tank. After the direction is adjusted by rotation, the unloading and transporting mechanism 83 picks it up and loads it onto the finished product limiting loading slot of the finished product peripheral transfer seat 811. This saves space and meets the back-end finished product transportation needs.

[0068] In a specific embodiment, Figures 15 to 17 As shown, an automatic pallet supply device 25 is provided at the loading end of the cover plate circulating conveyor rail, and the automatic pallet supply device includes an automatic pallet supply circulation part 251 and a cover plate feeding turnover mechanism 252 for performing cover plate feeding turnover between the automatic pallet supply circulation part and the cover plate circulating conveyor rail.

[0069] Specifically, the automated pallet supply of the cover body is achieved through the automated pallet supply circulation unit 251, and the cover material loading and unloading mechanism 252 picks up the material thereon and places it on the cover circulation conveyor rail.

[0070] In a specific embodiment, Fig.18 As shown, a collector tray supply device 9 is provided at the loading end of the collector tray circulation conveyor track.

[0071] The convergence plate supply device 9 includes a rotating plate 91 with a plurality of convergence plate revolving seats 910, and a convergence plate loading station 92, a convergence plate coding station 93, a convergence plate code scanning station 94, and a convergence plate unloading station 95 which are sequentially arranged along the direction of the rotating plate.

[0072] The manifold loading station 92 includes a manifold supply mechanism 920 .

[0073] The busbar coding station 93 includes a laser marking mechanism 930 for laser coding.

[0074] The busbar scanning station 94 includes a scanning detection station 940 for scanning and detecting the laser codes.

[0075] The convergence tray unloading station 95 includes an NG unloading mechanism 951 and a qualified product turning mechanism 952. The NG unloading mechanism 951 includes an unloading cabin 9511 and an NG unloading turnover part 9512 for switching displacement between the unloading cabin and the convergence tray turnover seat; the qualified product turning mechanism 952 includes a negative convergence tray turning part 9521 for picking up the negative convergence tray on the convergence tray turnover seat for turning over, and a qualified product turning part 9522 for turning over between the negative convergence tray turning part and the convergence tray circulation conveying rail.

[0076] Specifically, the convergence plate supply mechanism 920 feeds materials to the convergence plate turnover seat 910. After feeding, the materials are laser coded by the laser marking mechanism 930 at the convergence plate coding station 93. After coding, they enter the unloading station after code scanning detection. During unloading, NG products are placed in the unloading chamber 9511 by the NG unloading turnover part 9512, and qualified products are flipped by the negative electrode convergence plate flipping part 9521 and then transferred by the qualified product turnover part 9522.

[0077] In a specific embodiment, Fig.19 and Fig. 20 As shown, the convergence plate supply mechanism 920 includes a clip rotating plate 9201 having a plurality of convergence plate clips, and a material turnover mechanism 9202 for performing material turnover between the discharge end of the clip rotating plate and the convergence plate turnover seat.

[0078] That is, the material is continuously supplied through the clip rotating disk 9201 , and the material turnover mechanism 9202 picks up the material and places it on the collection disk turnover seat 910 of the rotating disk 91 .

[0079] From the above description, it can be found that the efficient and automated welding operation of the negative busbar and the battery cover can be realized, and the operation is smooth and efficient. It has various loading and transportation positioning, so that the pre-assembly accuracy of the negative busbar and the cover body is guaranteed, ensuring reliable and stable welding quality, and significantly improving the product qualification rate. The overall layout is compact and easy to arrange and promote.

[0080] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0081] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An automated assembly welding production line for a negative busbar, used for assembly welding of a cover plate body and a negative busbar, wherein the cover plate body comprises a disc body with an eccentric hole, the negative busbar comprises a circular end and a connecting end connected to the circular end, the outer periphery of the circular end comprises an outer peripheral notch, and is characterized in that: The automated assembly and welding production line includes a station turntable with a plurality of assembly tools, a cover plate body loading station, a busbar loading station, an assembly inspection station, a welding station, a post-weld inspection station, an internal resistance inspection station, and a discharge station arranged in sequence along the rotation direction of the station turntable; The assembly tool comprises a carrier base, at least one assembly loading position provided on the carrier base and having a through passage, the assembly loading position comprises a disc body loading groove for limiting the position of the disc body, a busbar positioning portion for limiting the position of the negative busbar, the disc body loading groove is provided with an eccentric hole positioning portion matched with the eccentric hole position, the busbar positioning portion comprises a positioning groove for positioning the connection end, and a positioning pin for positioning and matching with the peripheral notch; The cover plate body loading station comprises a cover plate circulating conveying rail with a plurality of cover plate carriers, and a cover plate conveying mechanism for circulating between the cover plate carrier and the assembly carrier, the cover plate carrier is provided with a cover plate loading groove, and the cover plate loading groove is provided with an eccentric hole limiting portion matched with the eccentric hole position; The busbar loading station includes a busbar circulation conveyor rail with a plurality of busbar carriers, and a busbar transport mechanism for circulating between the busbar carrier and the assembly carrier, wherein the busbar carrier is provided with a contoured loading slot that is contoured to the negative busbar; The assembly inspection station includes an image inspection mechanism for detecting the relative position of the cover plate body and the negative busbar on the assembly tool; The welding station includes a laser welding mechanism, and the laser welding mechanism includes a laser welding part for laser welding and an auxiliary crimping part with lifting displacement for auxiliary crimping of the negative busbar; The post-weld inspection station includes a post-weld inspection mechanism for post-weld image inspection; The internal resistance detection station includes an internal resistance detection mechanism, and the internal resistance detection mechanism includes a top conductive member with lifting displacement and a bottom conductive member with lifting displacement and penetrating the through channel; The unloading station includes a good product conveyor belt, an NG unloading belt, and an unloading and transporting mechanism for circulating between the good product conveyor belt and the assembly tool and between the NG unloading belt and the assembly tool.

2. According to claim 1, an automated assembly welding production line for negative busbars is characterized by: The cover plate conveying mechanism includes a cover plate negative pressure picking end with linear displacement, lifting displacement and rotational displacement. A visual guidance mechanism for visually guiding deviation correction and feeding, which is communicated with the cover plate conveying mechanism, is provided on the displacement path of the cover plate negative pressure picking end.

3. The automated assembly welding production line for negative busbars according to claim 2, characterized in that: A secondary positioning base for secondary positioning of the cover plate body is provided between the discharge end of the cover plate circulation conveying rail and the station turntable, and a secondary positioning groove is provided on the secondary positioning base; The cover plate conveying mechanism comprises a first cover plate negative pressure picking end for circulating between the cover plate circulating conveying rail and the secondary positioning base, and a second cover plate negative pressure picking end for circulating between the secondary positioning base and the station turntable; the first cover plate negative pressure picking end has linear displacement and lifting displacement; the second cover plate negative pressure picking end has linear displacement, lifting displacement and rotational displacement; The visual guiding mechanism is located on the turnover path of the negative pressure picking end of the cover plate between the secondary positioning base and the workstation turntable.

4. The automated assembly welding production line for negative busbars according to claim 1, characterized in that: The busbar transport mechanism includes a busbar picking portion with linear displacement and lifting displacement, the busbar picking portion includes at least two busbar negative pressure picking ends arranged at intervals, a positioning and shaping fixture for secondary positioning and shaping is provided between the busbar circulation conveying rail and the workstation turntable, and the positioning and shaping fixture is provided with a positioning and shaping loading groove arranged in the same shape as the negative electrode busbar.

5. The automated assembly welding production line for negative busbars according to claim 1, characterized in that: The good product conveyor belt comprises a finished product conveyor rail with a plurality of finished product peripheral transfer seats, and the finished product peripheral transfer seats are provided with finished product limiting loading grooves; The unloading and handling mechanism includes a finished product turnover part with linear displacement and lifting displacement. An angle adjustment mechanism is provided on the displacement path of the finished product turnover part. The angle adjustment mechanism includes an angle adjustment seat with rotational displacement. A finished product storage tank is provided on the angle adjustment seat.

6. The automated assembly welding production line for negative busbars according to any one of claims 1 to 5, characterized in that: An automatic pallet supply device is provided at the loading end of the cover plate circulating conveyor rail, and the automatic pallet supply device includes an automatic pallet supply circulation part and a cover plate loading turnover mechanism for performing cover plate loading turnover between the automatic pallet supply circulation part and the cover plate circulating conveyor rail.

7. The automated assembly welding production line for negative busbars according to any one of claims 1 to 5, characterized in that: The feeding end of the busbar circulation conveyor rail is provided with a busbar supply device; The convergence plate supply device comprises a rotating plate with a plurality of convergence plate revolving seats, a convergence plate loading station, a convergence plate coding station, a convergence plate scanning station, and a convergence plate unloading station arranged in sequence along the direction of the rotating plate; The busbar loading station includes a busbar supply mechanism; The busbar coding station includes a laser marking mechanism for laser coding; The busbar scanning station includes a scanning detection station for scanning and detecting laser codes; The convergence plate unloading station includes an NG unloading mechanism and a qualified product flipping mechanism. The NG unloading mechanism includes an unloading cabin and an NG unloading turnover part for switching displacement between the unloading cabin and the convergence plate turnover seat; the qualified product flipping mechanism includes a negative convergence plate flipping part for picking up the negative convergence plate on the convergence plate turnover seat for flipping, and a qualified product turnover part for turnover between the negative convergence plate flipping part and the convergence plate circulation conveying rail.

8. The automated assembly welding production line for negative busbars according to claim 7, characterized in that: The confluence plate supply mechanism includes a clip rotating plate with a plurality of confluence plate clips, and a material turnover mechanism for performing material turnover between a discharge end of the clip rotating plate and the confluence plate turnover seat.

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