Automatic assembling and welding production line for power battery cover plate

Abstract

The invention discloses an automatic assembling and welding production line for a power battery cover plate. Comprising an automatic turnover line, and an electrode pin column feeding and assembling station, an insulation pad sleeve feeding and assembling station, a battery cover plate feeding and assembling station, a sealing ring feeding and assembling station, a sealing ring detection station, a plastic substrate feeding and assembling station, an electrode pressing ring feeding and assembling station, a pre-assembling detection station and a riveting and pressing assembling station which are sequentially arranged in the direction of the production line. The device comprises a welding station, a post-welding detection station, an NG unloading station, a flatness shaping station and a finished product unloading station. The automatic assembling and welding operation requirement of the improved product is met, the preassembling precision and the welding quality are ensured, and the product forming qualification rate is remarkably increased. Through reasonable station arrangement and guiding design, effective operation of all stations is greatly improved, the assembling NG rate and the after-welding NG rate are remarkably reduced, and therefore control over the product backflow rate is guaranteed. And operation is smooth and stable, and the continuous and efficient assembling and welding production requirement is met.

Description

Technical Field

[0001] The invention relates to an automated assembly welding production line for a power battery cover plate, and belongs to the technical field of battery cover plate 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] As the carrier of the battery module, the power battery system housing (battery shell) plays a key role in the stable operation and safety protection of the battery module. In addition to ensuring the strength, rigidity and collision safety requirements, it can also meet the IP67 protection level design requirements for the electrical equipment housing. Many vehicle manufacturers have specially developed electric vehicle platforms that adopt a floor platform battery system layout, and even integrate the battery shell and the body floor into one, changing the traditional body shape and making the battery shell a part of the body, which has a great impact on the strength, rigidity and collision safety of the vehicle. Therefore, although the battery shell is generally considered to be a component of the battery pack of new energy vehicles, it involves the body system and electrical safety and is a key component of new energy vehicles.

[0004] The power battery cover is a core part of the battery shell, which generally includes a substrate, a top cover, and positive and negative poles. There is an explosion-proof valve on the substrate. During assembly, the substrate and the top cover are assembled into one, and then the positive and negative poles are assembled and welded to ensure that the poles are assembled and fixed.

[0005] Referring to the battery cover welding devices of publication number CN114102157A and publication number CN115415718A, it is necessary to set a conductive structure on the top cover, such as an aluminum block, and perform relative conductive welding after the pole passes through the substrate and the top cover. The welding process requires positioning, pressing, rotating spot welding control, etc., and the assembly operation is cumbersome and the cost is high.

[0006] In response to this situation, the applicant has proposed an improved method and equipment with publication number CN116937082A, which made structural adjustments to omit the aluminum block and adopted injection molding after assembly to achieve the fastening of the free end of the pole. It omits the welding process while ensuring the locking stability of the pole, thereby significantly improving production efficiency and product qualification rate.

[0007] The current mainstream method is: welding the aluminum block to the electrode, and bonding the aluminum block to the electrode through injection molding or one-piece injection molding. Welding the aluminum block to the electrode can undoubtedly increase the structural strength and conduction stability, but in the traditional welding assembly structure, the structure of the electrode penetrating the cover plate and the substrate makes it difficult to control the relative position accuracy between the electrode and the aluminum block, resulting in poor welding quality and unable to meet the product qualification rate. The sampling one-piece injection molding or injection molding riveting method requires a large number of positioning holes and positioning pins to be set on it, and high-precision assembly and coordination through multiple precision stations or to meet the assembly accuracy before injection molding. Both have very high requirements on the equipment assembly accuracy, and the pre-assembly qualification rate is poor. At the same time, the conductivity of the riveted structure cannot be guaranteed. Summary of the invention

[0008] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art. In view of the problem that traditional welding or injection molding riveting has poor assembly precision and affects product qualification rate, an automated assembly welding production line for power battery cover is proposed.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is: An automated assembly welding production line for a power battery cover, the power battery cover comprising a plastic substrate, a battery cover, and two electrode assemblies spaced apart from each other, the electrode assembly comprising an electrode pin, an insulating gasket, a sealing ring, and an electrode pressing ring, the electrode pin comprising a prism penetrating the insulating gasket, the insulating gasket comprising a prism limiting sleeve sleeved on the prism, the sealing ring being a prism ring body sleeved on the prism limiting sleeve and supported on the battery cover, the battery cover being provided with a prism opening matching the prism limiting sleeve, the plastic substrate being provided with a matching position matching the prism opening, the matching position being provided with a pressing ring carrying groove for carrying the electrode pressing ring and a window portion for the prism penetrating the prism and matching the electrode pressing ring, the inner ring wall of the window portion matching the outer peripheral wall of the prism ring body; The automated assembly welding production line includes an automated turnover line with a plurality of assembly tools, an electrode pin loading and assembly station, an insulating gasket loading and assembly station, a battery cover loading and assembly station, a sealing ring loading and assembly station, a sealing ring inspection station, a plastic substrate loading and assembly station, an electrode pressure ring loading and assembly station, a pre-assembly inspection station, a riveting assembly station, a welding station, a post-welding inspection station, an NG unloading station, a flatness shaping station, and a finished product unloading station, which are sequentially arranged along the running direction of the automated turnover line; The electrode pin loading and assembly station comprises an electrode pin loader and an electrode pin assembly mechanism for picking up the electrode pins of the electrode pin loader and assembling them on the assembly vehicle; The insulating sleeve loading and assembly station comprises an insulating sleeve loading machine and an insulating sleeve assembly mechanism for picking up the insulating sleeve of the insulating sleeve loading machine and assembling the insulating sleeve on the electrode pin; The battery cover plate feeding and assembly station comprises a battery cover plate supply line arranged in parallel with the automated turnover line, and a battery cover plate transfer and assembly mechanism arranged at the discharge end of the battery cover plate supply line; The sealing ring loading and assembly station comprises a sealing ring loader and a sealing ring assembly mechanism for picking up the sealing ring of the sealing ring loader, which is sleeved on the insulating gasket and abuts against the battery cover; The sealing ring detection station includes a sealing ring visual detection mechanism for detecting the position of the sealing ring; The plastic substrate loading and assembly station comprises a plastic substrate loading machine and a plastic substrate assembly mechanism for picking up the plastic substrate of the plastic substrate loading machine and pressing it onto the battery cover; The electrode pressure ring loading and assembly station comprises an electrode pressure ring loader and an electrode pressure ring assembly mechanism for picking up the electrode pressure ring of the electrode pressure ring loader and loading it into the pressure ring loading groove; The pre-assembly inspection station includes a pressure ring visual inspection mechanism for detecting the mounting position of the electrode pressure ring; The riveting assembly station includes a riveting assembly mechanism for riveting the electrode pin and the electrode pressure ring; The welding station includes a welding mechanism for welding the electrode pin and the electrode pressure ring; The post-weld inspection station includes a welding visual inspection mechanism for inspecting welding quality; The NG unloading station includes an NG conveyor belt and an NG turnover mechanism; The flatness shaping station includes a flatness shaping mechanism; The finished product unloading station includes a finished product conveying line and a finished product turnover mechanism.

[0010] Preferably, the automated assembly welding production line comprises a jig cover plate circulation device for providing jig cover plates; The jig cover plate circulation device includes a jig cover plate loading station arranged between the plastic substrate loading and assembly station and the electrode pressure ring loading and assembly station, a jig cover plate unloading station arranged between the post-weld inspection station and the NG unloading station, and a cover plate circulation turnover line for the circulation of jig cover plates arranged between the jig cover plate loading station and the jig cover plate unloading station.

[0011] Preferably, a viewing angle guide part for visual assembly guidance is respectively provided on the assembly paths of the electrode pin assembly mechanism, the insulating gasket assembly mechanism and the electrode pressure ring assembly mechanism.

[0012] Preferably, the battery cover transfer assembly mechanism includes a battery cover transfer part with lifting displacement and linear displacement, a code scanning mechanism located on the turnover path of the battery cover transfer part, a buffer feeding part, and a reverse unloading cabin; The battery cover is provided with a liquid injection port, and the battery cover transfer portion is provided with a vacuum detection portion for being arranged opposite to the liquid injection port.

[0013] Preferably, secondary positioning tooling for secondary positioning of workpieces is respectively provided on the assembly paths of the sealing ring assembly mechanism and the plastic substrate assembly mechanism.

[0014] Preferably, the riveting assembly mechanism includes a riveting lifting portion located at the bottom of the automated turnover line and a riveting seat located at the top of the automated turnover line, and the riveting lifting portion has a lifting displacement relative to the riveting seat.

[0015] Preferably, the welding mechanism comprises a welding bracket located at the top of the automated turnover line, a laser welder located at the top of the welding bracket, and a welding lifting seat with lifting displacement located at the bottom of the welding bracket.

[0016] Preferably, the welding bracket is provided with a welding cabin arranged opposite to the assembly vehicle, the welding cabin is provided with a dust removal pipeline, and the laser welder has a lifting displacement.

[0017] Preferably, the flatness shaping station comprises a shaping and transporting mechanism for switching displacement between the flatness shaping mechanism and the automated turnover line; The flatness shaping mechanism comprises a shaping top die seat with lifting displacement and a shaping bottom die seat with linear switching displacement arranged at the bottom of the shaping top die seat.

[0018] Preferably, the assembly vehicle includes a supporting platform, on which is provided a cover plate recess for carrying a power battery cover plate, and a plurality of guide rollers arranged on the outer periphery of the cover plate recess, and the cover plate recess is provided with an electrode pin positioning groove for assembling and limiting the electrode pin.

[0019] The beneficial effects of the present invention are mainly reflected in: 1. Meet the needs of automated assembly and welding operations for improved products, ensure pre-installation accuracy and welding quality, and significantly improve the product molding qualification rate.

[0020] 2. Through reasonable workstation layout and guide design, the effective operation of each workstation is greatly improved, so that the assembly NG rate and post-welding NG rate are significantly reduced, so that the product reflow rate control is guaranteed.

[0021] 3. The operation is smooth and stable, meeting the needs of continuous and efficient assembly and welding production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 structural schematic diagram of the automated assembly and welding production line of the power battery cover plate of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the first stage equipment in the present invention.

[0024] Figure 3 It is a structural schematic diagram of the second stage equipment in the present invention.

[0025] Figure 4 It is a structural schematic diagram of the third stage equipment in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the electrode pin assembly mechanism in the present invention.

[0027] Figure 6 It is a structural schematic diagram of the insulating gasket assembly mechanism of the present invention.

[0028] Figure 7 It is a structural schematic diagram of the battery cover transfer assembly mechanism in the present invention.

[0029] Figure 8 It is a structural schematic diagram of the sealing ring assembly mechanism in the present invention.

[0030] Fig. 9 It is a structural schematic diagram of the sealing ring visual detection mechanism in the present invention.

[0031] Fig.10 It is a structural schematic diagram of the plastic substrate assembly mechanism in the present invention.

[0032] Fig.11 It is a structural schematic diagram of the electrode pressure ring assembly mechanism in the present invention.

[0033] Fig.12 It is a structural schematic diagram of the visual detection mechanism of the pressure ring in the present invention.

[0034] Fig.13 It is a structural schematic diagram of the riveting assembly mechanism in the present invention.

[0035] Fig.14 It is a structural schematic diagram of the welding mechanism in the present invention.

[0036] Fig.15 It is a structural schematic diagram of the welding visual inspection mechanism in the present invention.

[0037] Fig.16It is a structural schematic diagram of the NG turnover mechanism in the present invention.

[0038] Fig.17 It is a structural schematic diagram of the flatness shaping mechanism in the present invention.

[0039] Fig.18 It is a structural schematic diagram of the finished product turnover mechanism in the present invention.

[0040] Fig.19 It is a structural schematic diagram of the jig cover plate circulation device in the present invention.

[0041] Fig. 20 It is a schematic diagram of the explosion structure of the power battery cover plate in the present invention. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] The present invention provides an automated assembly and welding production line for a power battery cover plate, such as Fig. 20 As shown, the power battery cover 100 includes a plastic substrate 110, a battery cover 120, and two electrode assemblies arranged at intervals. The electrode assembly includes an electrode pin 130, an insulating gasket 140, a sealing ring 150, and an electrode pressure ring 160. The electrode pin 130 includes a prism 1301 that passes through the insulating gasket, and the insulating gasket 140 includes a prism limiting sleeve 1401 that is sleeved on the prism. The sealing ring 150 is a prism ring body that is sleeved on the prism limiting sleeve and supported on the battery cover. The battery cover 120 is provided with a prism window 1201 that is shaped like the prism limiting sleeve, and the plastic substrate 110 is provided with a matching position 1101 that matches the prism window. The matching position is provided with a pressure ring carrying groove for carrying the electrode pressure ring and a window portion for the prism to pass through and match the electrode pressure ring. The inner ring wall of the window portion matches the outer peripheral wall of the prism ring body.

[0045] First, Fig. 20As shown, the product is an improved structural part for assembly. Through the structure of the prism 1301, the reliability of its assembly circumferential limit and the relative assembly matching stability between the components are met. Under the condition of relatively reliable assembly, the riveted combination is realized. The relative pre-assembly accuracy is guaranteed, so that the quality of the rear-end assembly welding is reliable and stable. After assembly on the production line, the qualified rate of the finished products is significantly improved.

[0046] In order to meet the requirements of battery cover assembly after improving the structure, in this case, Figures 1 to 19 As shown, the automated assembly welding production line includes an automated turnover line 1 with a plurality of assembly tools 10, an electrode pin loading and assembly station 11, an insulating gasket loading and assembly station 12, a battery cover loading and assembly station 13, a sealing ring loading and assembly station 21, a sealing ring inspection station 22, a plastic substrate loading and assembly station 23, an electrode pressure ring loading and assembly station 24, a pre-assembly inspection station 31, a riveting assembly station 32, a welding station 33, a post-weld inspection station 34, an NG unloading station 35, a flatness shaping station 36, and a finished product unloading station 37.

[0047] like Figures 1 to 4 As shown, the automated assembly welding production line includes a first section of equipment, a second section of equipment, and a third section of equipment that are spliced ​​together, and the entirety is constructed as an overall production line.

[0048] The electrode pin loading and assembly station 11 comprises an electrode pin loader 111 and an electrode pin assembly mechanism 112 for picking up electrode pins from the electrode pin loader and assembling them on an assembly vehicle.

[0049] The insulating sleeve loading and assembly station 12 comprises an insulating sleeve loading machine 121 and an insulating sleeve assembly mechanism 122 for picking up the insulating sleeve of the insulating sleeve loading machine and assembling the insulating sleeve on the electrode pin.

[0050] The battery cover plate feeding and assembly station 13 comprises a battery cover plate supply line 131 arranged in parallel with the automated turnover line, and a battery cover plate transfer and assembly mechanism 132 arranged at the discharge end of the battery cover plate supply line.

[0051] The sealing ring loading and assembly station 21 comprises a sealing ring loader 211 and a sealing ring assembly mechanism 212 for picking up the sealing ring of the sealing ring loader, sleeved on the insulating gasket and abutting against the battery cover.

[0052] The sealing ring inspection station 22 includes a sealing ring visual inspection mechanism 220 for inspecting the position of the sealing ring.

[0053] The plastic substrate loading and assembly station 23 comprises a plastic substrate loading machine 231 and a plastic substrate assembly mechanism 232 for picking up the plastic substrate from the plastic substrate loading machine and pressing it onto the battery cover.

[0054] The electrode pressing ring loading and assembly station 24 comprises an electrode pressing ring loader 241 and an electrode pressing ring assembly mechanism 242 for picking up the electrode pressing ring from the electrode pressing ring loader and loading it into the pressing ring loading groove.

[0055] The pre-assembly inspection station 31 includes a pressure ring visual inspection mechanism 310 for inspecting the mounting position of the electrode pressure ring.

[0056] The riveting assembly station 32 includes a riveting assembly mechanism 320 for riveting the electrode pin and the electrode pressing ring.

[0057] The welding station 33 includes a welding mechanism 330 for welding the electrode pin and the electrode pressure ring.

[0058] The post-weld inspection station 34 includes a weld visual inspection mechanism 340 for inspecting weld quality.

[0059] The NG unloading station 35 includes an NG conveyor belt 351 and an NG turnover mechanism 352 .

[0060] The flatness shaping station 36 includes a flatness shaping mechanism 360 .

[0061] The finished product unloading station 37 includes a finished product conveying line 371 and a finished product turnover mechanism 372 .

[0062] Specific implementation process and principle description: The automated turnover line 1 is equipped with an assembly tool 10 to switch workstations in sequence along the production line direction.

[0063] At the electrode pin feeding and assembly station 11 , the electrode pin loader 111 supplies electrode pins, and the electrode pin assembly mechanism 112 picks up the electrode pins from the electrode pin loader and assembles them on the assembly vehicle 10 .

[0064] At the insulating sleeve loading and assembly station 12, the insulating sleeve assembly mechanism 122 picks up the insulating sleeve assembly sleeve of the insulating sleeve loading machine 121 and connects it to the electrode pin.

[0065] At the battery cover plate feeding and assembly station 13 , the battery cover plate transfer assembly mechanism 132 picks up the battery cover plate from the battery cover plate supply line 131 and places it on the assembly vehicle 10 to achieve assembly and connection with the insulating gasket.

[0066] At the sealing ring loading and assembly station 21 , the sealing ring assembly mechanism 212 picks up the sealing ring supplied by the sealing ring loader 211 , sleeves it on the insulating gasket and abuts against the battery cover.

[0067] After the sealing ring is assembled, it is inspected for position by the sealing ring visual inspection mechanism 220 of the sealing ring inspection station 22. If it is qualified, the plastic substrate is assembled. If it is unqualified, it is directly sent to the NG position.

[0068] At the plastic substrate loading and assembling station 23 , the plastic substrate assembling mechanism 232 picks up the plastic substrate supplied by the plastic substrate loading machine 231 and presses it onto the battery cover.

[0069] At the electrode pressing ring loading and assembly station 24, the electrode pressing ring assembly mechanism 242 picks up the electrode pressing ring supplied by the electrode pressing ring loader 241 and places it in the pressing ring loading groove.

[0070] This enables smoother pre-installation operations.

[0071] Next, at the pre-assembly inspection station 31, the pre-assembled product is visually inspected by the pressure ring visual inspection mechanism 310. If the assembly accuracy meets the requirements, it will enter the next station for riveting assembly. If the pre-assembly fails, it will directly run along the production line to the NG position for unloading.

[0072] At the riveting and pressing assembly station 32, the riveting and pressing assembly mechanism 320 performs riveting of the electrode pin and the electrode pressing ring.

[0073] At the welding station 33, the welding mechanism 330 performs welding operation on the electrode pin and the electrode pressure ring.

[0074] After the product is welded, it moves to the post-weld inspection station 34 for inspection by the welding visual inspection mechanism 340 .

[0075] Unqualified products are detected and transported to the NG unloading station 35 through the NG turnover mechanism 352 and placed on the NG conveyor belt 351 for unloading.

[0076] It should be noted that the NG turnover mechanism 352 has a prism adsorption portion corresponding one-to-one to the prism 1301 and a plurality of negative pressure adsorption ends for the battery cover 120, so as to ensure the stable unloading of the un-riveted assembly NG products without the loss of parts.

[0077] The qualified products are qualified products. Before going off the production line, the flatness shaping station 36 is flattened by the flatness shaping mechanism 360. After shaping, the products are directly unloaded on the finished product conveying line by the finished product turnover mechanism at the finished product unloading station 37. Flatness is the overall shaping of the product. Due to the riveting and welding combination adopted in this case, the overall structural strength and reliability of the electrode column assembly are guaranteed. Therefore, shaping will not cause damage to the welding parts, and there is no need to set up an additional product inspection station after flattening.

[0078] In a specific embodiment, Figures 1 to 4 , Fig.19As shown, the automated assembly welding production line includes a jig cover plate circulation device 4 for providing jig cover plates.

[0079] The jig cover plate circulation device 4 includes a jig cover plate loading station 41 arranged between the plastic substrate loading and assembly station and the electrode pressure ring loading and assembly station, a jig cover plate unloading station 42 arranged between the post-weld inspection station and the NG unloading station, and a cover plate circulation turnover line 43 for the circulation of jig cover plates arranged between the jig cover plate loading station and the jig cover plate unloading station.

[0080] Specific implementation process and principle description: The jig cover can be used to press the plastic substrate before the electrode pressing ring is loaded, so that the relative stability of the product after pressing is guaranteed. At the same time, the jig cover can guide the electrode pressing ring so that the position of the electrode pressing ring is reliable. During riveting and welding, the overall pre-installation reliability is guaranteed, and no large product deformation will occur during riveting or welding. In this way, the product qualification rate is significantly improved.

[0081] The jig cover plate is refluxed through the cover plate circulation turnover line 43 to meet the circulation and production needs.

[0082] In a specific embodiment, a viewing angle guide part 5 for visual assembly guidance is respectively provided on the assembly paths of the electrode pin assembly mechanism 112 , the insulating sleeve assembly mechanism 122 , and the electrode pressure ring assembly mechanism 242 .

[0083] That is, the viewing angle guide part 5 is used to guide and ensure that the assembly position is accurate and reliable.

[0084] In a specific embodiment, the battery cover transfer assembly mechanism 132 includes a battery cover transfer part 1321 with lifting displacement and linear displacement, a code scanning mechanism 1322 located on the turnover path of the battery cover transfer part, a buffer replenishment part 1323, and a reverse unloading cabin 1324; The battery cover 120 is provided with a liquid injection port 1202, and the battery cover transfer portion is provided with a vacuum detection portion for being arranged opposite to the liquid injection port.

[0085] That is, it can realize vacuum detection on both sides of the battery cover transfer part 1321 during its turnover process, and at the same time meet the requirements of material scanning and traceability. In addition, when the battery cover is transferred for reverse unloading, it is discarded in the reverse unloading cabin 1324, and then the material on the cache replenishment part 1323 is picked up, so that there will be no empty space.

[0086] In a specific embodiment, secondary positioning tools 6 for secondary positioning of workpieces are respectively provided on the assembly paths of the sealing ring assembly mechanism 212 and the plastic substrate assembly mechanism 232 .

[0087] That is, the secondary positioning tool 6 can ensure the feeding position accuracy of the sealing ring and the plastic substrate, and the pre-installation qualification rate is significantly improved.

[0088] In a specific embodiment, the riveting assembly mechanism 320 includes a riveting lifting portion 321 located at the bottom of the automated turnover line and a riveting seat 322 located at the top of the automated turnover line, and the riveting lifting portion has a lifting displacement relative to the riveting seat.

[0089] That is, the assembly tool is lifted up by the riveting press seat to achieve the relative matching riveting operation. There is no need for the production line to support it, and there will be no crimping damage to the production line.

[0090] In a specific embodiment, the welding mechanism 330 includes a welding bracket 331 located at the top of the automated turnover line, a laser welder 332 located at the top of the welding bracket, and a welding lifting seat 333 with lifting displacement located at the bottom of the welding bracket.

[0091] That is, the welding operation is performed with relative limiting after the assembled vehicle is lifted.

[0092] Specifically, the welding bracket is provided with a welding cabin 334 which is arranged opposite to the assembly vehicle, the welding cabin 334 is provided with a dust removal pipeline 3340, and the laser welder has a lifting displacement.

[0093] This meets the positioning restrictions and dust removal requirements during the welding process. In addition, the flexible adjustment requirements of the welding stroke can be met by adjusting the lifting displacement.

[0094] In a specific embodiment, the flatness shaping station includes a shaping transport mechanism 7 for switching displacement between the flatness shaping mechanism 360 and the automated turnover line.

[0095] The flatness shaping mechanism 360 includes a shaping top die seat 361 with lifting displacement and a shaping bottom die seat 362 with linear switching displacement arranged at the bottom of the shaping top die seat.

[0096] Specifically, the shaping and conveying mechanism picks up the product on the automated turnover line, places it on the shaping bottom die seat 362 and moves it to the bottom of the shaping top die seat 361 for crimping and shaping. After shaping, the shaping and conveying mechanism carries out the conveying and unloading.

[0097] In a specific embodiment, the assembly vehicle includes a supporting platform, which is provided with a cover plate groove for carrying the power battery cover plate, a plurality of guide rollers arranged on the outer periphery of the cover plate groove, and an electrode pin positioning groove for assembling and limiting the electrode pin.

[0098] In this way, the guiding and mounting requirements for each component workpiece during pre-assembly are met, and the pre-assembly accuracy is guaranteed.

[0099] From the above description, we can find that the automated assembly and welding operation requirements of the improved products are met, the pre-installation accuracy and welding quality are ensured, and the product molding qualification rate is significantly improved. Through reasonable station layout and guide design, the effective operation of each station is greatly improved, so that the assembly NG rate and post-welding NG rate are significantly reduced, so that the product reflow rate control is guaranteed. The operation is smooth and stable, meeting the continuous and efficient assembly and welding production requirements.

[0100] 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.

[0101] 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 power battery cover, the power battery cover comprising a plastic substrate, a battery cover, and two electrode assemblies spaced apart from each other, the electrode assembly comprising an electrode pin, an insulating gasket, a sealing ring, and an electrode pressure ring, the electrode pin comprising a prism penetrating the insulating gasket, the insulating gasket comprising a prism limiting sleeve sleeved on the prism, the sealing ring being a prism ring body sleeved on the prism limiting sleeve and supported on the battery cover, the battery cover being provided with a prism opening matching the prism limiting sleeve, the plastic substrate being provided with a matching position matching the prism opening, the matching position being provided with a pressure ring carrying groove for carrying the electrode pressure ring and a window portion for the prism penetrating the prism and matching the electrode pressure ring, the inner ring wall of the window portion matching the outer peripheral wall of the prism ring body; characterized in that: The automated assembly welding production line includes an automated turnover line with a plurality of assembly tools, an electrode pin loading and assembly station, an insulating gasket loading and assembly station, a battery cover loading and assembly station, a sealing ring loading and assembly station, a sealing ring inspection station, a plastic substrate loading and assembly station, an electrode pressure ring loading and assembly station, a pre-assembly inspection station, a riveting assembly station, a welding station, a post-welding inspection station, an NG unloading station, a flatness shaping station, and a finished product unloading station, which are sequentially arranged along the running direction of the automated turnover line; The electrode pin loading and assembly station comprises an electrode pin loader and an electrode pin assembly mechanism for picking up the electrode pins of the electrode pin loader and assembling them on the assembly vehicle; The insulating sleeve loading and assembly station comprises an insulating sleeve loading machine and an insulating sleeve assembly mechanism for picking up the insulating sleeve of the insulating sleeve loading machine and assembling the insulating sleeve on the electrode pin; The battery cover plate feeding and assembly station comprises a battery cover plate supply line arranged in parallel with the automated turnover line, and a battery cover plate transfer and assembly mechanism arranged at the discharge end of the battery cover plate supply line; The sealing ring loading and assembly station comprises a sealing ring loader and a sealing ring assembly mechanism for picking up the sealing ring of the sealing ring loader, which is sleeved on the insulating gasket and abuts against the battery cover; The sealing ring detection station includes a sealing ring visual detection mechanism for detecting the position of the sealing ring; The plastic substrate loading and assembly station comprises a plastic substrate loading machine and a plastic substrate assembly mechanism for picking up the plastic substrate of the plastic substrate loading machine and pressing it onto the battery cover; The electrode pressure ring loading and assembly station comprises an electrode pressure ring loader and an electrode pressure ring assembly mechanism for picking up the electrode pressure ring of the electrode pressure ring loader and loading it into the pressure ring loading groove; The pre-assembly inspection station includes a pressure ring visual inspection mechanism for detecting the mounting position of the electrode pressure ring; The riveting assembly station includes a riveting assembly mechanism for riveting the electrode pin and the electrode pressure ring; The welding station includes a welding mechanism for welding the electrode pin and the electrode pressure ring; The post-weld inspection station includes a welding visual inspection mechanism for inspecting welding quality; The NG unloading station includes an NG conveyor belt and an NG turnover mechanism; The flatness shaping station includes a flatness shaping mechanism; The finished product unloading station includes a finished product conveying line and a finished product turnover mechanism.

2. The automated assembly and welding production line for power battery cover plates according to claim 1, characterized in that: The automated assembly welding production line includes a jig cover plate circulation device for providing jig cover plates; The jig cover plate circulation device includes a jig cover plate loading station arranged between the plastic substrate loading and assembly station and the electrode pressure ring loading and assembly station, a jig cover plate unloading station arranged between the post-weld inspection station and the NG unloading station, and a cover plate circulation turnover line for the circulation of jig cover plates arranged between the jig cover plate loading station and the jig cover plate unloading station.

3. The automated assembly and welding production line for power battery cover plates according to claim 1 is characterized in that: The assembly paths of the electrode pin assembly mechanism, the insulating gasket assembly mechanism, and the electrode pressure ring assembly mechanism are respectively provided with viewing angle guide parts for visual assembly guidance.

4. The automated assembly and welding production line for power battery cover plates according to claim 1, characterized in that: The battery cover transfer assembly mechanism includes a battery cover transfer part with lifting displacement and linear displacement, a code scanning mechanism located on the turnover path of the battery cover transfer part, a buffer feeding part, and a reverse unloading cabin; The battery cover is provided with a liquid injection port, and the battery cover transfer portion is provided with a vacuum detection portion for being arranged opposite to the liquid injection port.

5. The automated assembly and welding production line for power battery cover plates according to claim 1, characterized in that: Secondary positioning tooling for secondary positioning of workpieces is respectively provided on the assembly paths of the sealing ring assembly mechanism and the plastic substrate assembly mechanism.

6. The automated assembly and welding production line for power battery cover plates according to claim 1, characterized in that: The riveting assembly mechanism includes a riveting lifting part located at the bottom of the automated turnover line and a riveting seat located at the top of the automated turnover line. The riveting lifting part has a lifting displacement relative to the riveting seat.

7. The automated assembly and welding production line for power battery cover plates according to claim 1, characterized in that: The welding mechanism comprises a welding bracket located at the top of the automated turnover line, a laser welder located at the top of the welding bracket, and a welding lifting seat with lifting displacement located at the bottom of the welding bracket.

8. The automated assembly and welding production line for power battery cover plates according to claim 7, characterized in that: The welding bracket is provided with a welding cabin body which is arranged opposite to the assembly vehicle, the welding cabin body is provided with a dust removal pipeline, and the laser welder has a lifting displacement.

9. The automated assembly and welding production line for power battery cover plates according to claim 1, characterized in that: The flatness shaping station includes a shaping and transporting mechanism for switching displacement between the flatness shaping mechanism and the automated turnover line; The flatness shaping mechanism comprises a shaping top die seat with lifting displacement and a shaping bottom die seat with linear switching displacement arranged at the bottom of the shaping top die seat.

10. The automated assembly and welding production line for power battery cover plates according to any one of claims 1 to 9, characterized in that: The assembly vehicle includes a supporting platform, on which a cover plate recess for carrying a power battery cover plate and a plurality of guide rollers arranged on the periphery of the cover plate recess are provided, and within the cover plate recess are electrode pin positioning grooves for assembling and limiting the electrode pins.

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