A double-line rotary automatic welding equipment for explosion-proof valves of battery covers

Abstract

This invention discloses a dual-line rotary automatic welding equipment for explosion-proof valves on battery covers, comprising a base body, a first conveyor line, and a second conveyor line. The first and second conveyor lines are respectively equipped with cover carriers featuring clearance windows. The base body includes a first carrier return station, a battery cover loading station, a coding station, a barcode scanning station, an explosion-proof valve loading and assembly station, an explosion-proof valve spot welding station, a first carrier switching station, a second carrier return station, an explosion-proof valve full welding station, a welding inspection station, a post-weld unloading station, and a second carrier switching station. The base body also includes a first cover carrier switching mechanism and a second cover carrier switching mechanism. This invention enables the construction of a cyclical production line, allowing for flexible configuration of a wide range of workstations and providing precise lifting and alignment of the workpiece at each workstation. It eliminates the difficulties in setting up traditional workstations and the inability to precisely align workpieces on traditional carriers, significantly improving the quality of product assembly and welding.

Description

Technical Field

[0001] This invention relates to an automatic welding equipment for a double-line rotary battery cover explosion-proof valve, belonging to the technical field of automated welding of explosion-proof valves. Background Technology

[0002] The power battery has a battery cover plate, also called a battery sealing plate. It is a thin-walled valve body that needs to be welded with an explosion-proof valve. When the internal pressure of the battery exceeds the specified value, the explosion-proof valve body will rupture to prevent the battery from exploding. The explosion-proof valve is generally welded by laser welding, which has very high requirements for the weld.

[0003] When building an automated production line for explosion-proof valves, there are requirements for stations such as battery cover loading, explosion-proof valve loading, spot welding, full welding, and post-weld inspection. The traditional method is to use a rotating pallet switching station. The rotating pallet has relatively few stations, and when more stations are needed, its relative diameter is relatively large.

[0004] In response to this situation, the applicant filed a Chinese invention patent with publication number CN114221013A, which discloses an explosion-proof valve assembly and welding equipment for power battery cover plates. It adopts a combination of multiple sets of rotating trays to meet the needs of loading and related trays for a relatively rich number of workstations. The design of multiple rotating trays makes the overall equipment larger in size, and the workpieces it loads need to be rotated more frequently, which undoubtedly reduces the stability of operation.

[0005] In this context, the applicant filed a Chinese invention patent with authorization announcement number CN113714651B, which discloses an automatic welding equipment for explosion-proof valves of battery covers. This equipment adopts a circulating rotary conveyor line to achieve a relatively rich workstation layout, meeting the assembly requirements for automated welding of explosion-proof valves.

[0006] However, this circulating rotary conveyor line has a high degree of integration, and its weekly transfer fixtures abut against each other. Therefore, there is interference between the weekly transfer fixtures in terms of the accuracy of the workstation alignment. During alignment control, it is also impossible to accurately adjust the weekly transfer fixtures that cooperate with the workstations. This is especially true when the workstations are used for spot welding and full welding, which directly affects the product qualification rate.

[0007] In addition, the welding of explosion-proof valves will affect the flatness of the battery cover. The closed-type carrier cavity of traditional peripheral transfer fixtures is also difficult to meet the online shaping requirements, which makes it impossible to integrate the finished product shaping mechanism on the circulating rotary conveyor line. Therefore, an additional finished product shaping mechanism needs to be set up after the finished product is output, which undoubtedly increases the equipment cost and affects the production cycle. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of the prior art. In view of the many problems that exist in traditional rotary pallet station switching and circulating rotary conveyor station switching, such as the inability to guarantee alignment accuracy, difficulty in adjustment, long operating cycle, and low product qualification rate, this invention proposes a double-line rotary automatic welding equipment for battery cover explosion-proof valves.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A dual-line rotary automatic welding equipment for battery cover explosion-proof valves is used for assembling and welding battery covers and explosion-proof valves. The battery cover includes a cover body, two spaced-apart pole holes on the cover body, and an explosion-proof valve mounting slot located between the two pole holes. The system includes a base body, a first conveyor line and a second conveyor line arranged parallel to each other and spaced apart on the base body. Each of the first and second conveyor lines has two spaced-apart conveyor belts and several cover plate carriers arranged along the direction of the conveyor belts and movably bridging the two conveyor belts. Each cover plate carrier includes a carrier base plate with cover plate grooves and a clearance window opposite to the cover plate grooves. The first and second conveyor lines run in opposite directions. The base body is provided with a first carrier return station, a battery cover loading station, a coding station, a barcode scanning station, an explosion-proof valve loading and assembly station, an explosion-proof valve spot welding station, and a first carrier switching station arranged sequentially along the running direction of the first conveyor line. The base body is provided with a second carrier return station, an explosion-proof valve full welding station, a welding inspection station, a post-weld unloading station, and a second carrier switching station arranged sequentially along the running direction of the second conveyor line. The base body is provided with a first cover plate carrier switching mechanism for switching the position of the cover plate carrier between the first carrier return station and the second carrier switching station, a second cover plate carrier switching mechanism for switching the position of the cover plate carrier between the first carrier switching station and the second carrier return station, an NG conveyor belt disposed between the first conveyor line and the second conveyor line, and a qualified product conveyor belt that cooperates with the post-weld unloading station; The battery cover loading station includes an automated battery cover conveyor line and a battery cover loading mechanism for picking up battery covers from the automated battery cover conveyor line onto the cover carrier at the battery cover loading station. The marking station includes a laser marking mechanism for laser marking the battery cover. The barcode scanning station includes a barcode scanning mechanism for scanning the laser code on the battery cover. The explosion-proof valve loading and assembly station includes an automated explosion-proof valve supply line and an explosion-proof valve transfer mechanism for picking up explosion-proof valves from the automated supply line and transferring them to the explosion-proof valve mounting slot of the battery cover at the explosion-proof valve loading and assembly station. The explosion-proof valve spot welding station includes a spot welding table located at the top of the cover plate carrier and a spot welding positioning support platform with lifting displacement located at the bottom of the cover plate carrier. The spot welding positioning support platform is provided with a spot welding positioning post for relative positioning and cooperation with the pole hole through the clearance window. The explosion-proof valve full welding station includes a full welding platform located at the top of the cover plate carrier and a full welding positioning support platform with lifting displacement located at the bottom of the cover plate carrier. The full welding positioning support platform is provided with a full welding positioning column for relative positioning and cooperation with the pole hole through the clearance window. The welding inspection station includes a welding image inspection mechanism for inspecting the welded parts on the outer periphery of the explosion-proof valve. The post-weld unloading station includes a battery cover turnover mechanism for rotating battery cover plates between the post-weld unloading station and the NG conveyor belt and between the post-weld unloading station and the qualified product conveyor belt.

[0010] Preferably, the battery cover feeding mechanism includes a feeding rack body, a battery cover front and back detection unit disposed on the feeding rack body and located at the top of the battery cover automated conveyor line, a feeding slide with linear switching displacement on the feeding rack body, and a battery cover picking end with lifting displacement disposed on the feeding slide.

[0011] Preferably, the feeding slide has a switching displacement between the battery cover automated conveyor line and the battery cover feeding station, and a switching displacement between the battery cover automated conveyor line and the NG conveyor belt.

[0012] Preferably, the laser marking mechanism includes a laser marking section located at the top of the cover plate carrier, a marking positioning platform with lifting displacement located at the bottom of the cover plate carrier, and a marking positioning column for passing through the clearance window and positioning relative to the pole hole on the marking positioning platform, and an air extraction and dust removal section for dust extraction.

[0013] Preferably, the explosion-proof valve transfer mechanism includes an explosion-proof valve position detection unit located at the bottom of the feeding end of the explosion-proof valve automated supply line, an explosion-proof valve mounting slot position detection unit located at the top of the cover plate carrier, and an explosion-proof valve transfer unit for rotating the explosion-proof valve based on the detection information of the explosion-proof valve position detection unit and the explosion-proof valve mounting slot position detection unit.

[0014] Preferably, the explosion-proof valve transfer mechanism includes an assembly positioning platform with lifting displacement located at the bottom of the cover plate carrier. The assembly positioning platform is provided with an assembly positioning post for relative positioning and engagement with the pole hole through the clearance window. The explosion-proof valve transfer unit includes an explosion-proof valve picking unit for picking up the explosion-proof valve, and the explosion-proof valve picking unit has horizontal linear displacement, lifting displacement and rotational displacement.

[0015] Preferably, the spot welding positioning support platform and the full welding positioning support platform are respectively provided with a horizontal support ring composed of a plurality of elastic support columns for supporting the horizontal position of the battery cover plate.

[0016] Preferably, the base body is provided with a mounting platform located between the first conveyor line and the second conveyor line, the spot welding station and the full welding station are respectively arranged on the mounting platform, and the spot welding station and the full welding station are respectively provided with lifting and adjusting displacement.

[0017] Preferably, the cover plate body is provided with a liquid injection channel. The base body is equipped with a liquid injection channel detection station located between the barcode scanning station and the explosion-proof valve loading and assembly station, and a cover plate shaping station located between the welding detection station and the post-weld unloading station. The injection channel detection station includes an injection channel detection mechanism, which includes an illumination light source located at the bottom of the cover plate carrier and an injection channel image detection unit located at the top of the cover plate carrier and opposite to the illumination light source. The cover plate shaping station includes a cover plate shaping mechanism, which includes a shaping abutment part located at the top of the cover plate carrier and a shaping lifting platform with lifting displacement located at the bottom of the cover plate carrier. The shaping abutment part is provided with two shaping posts arranged at intervals and a shaping image acquisition part located between the two shaping posts and facing the battery cover plate. The shaping lifting platform is provided with a lifting shaping block for passing through the avoidance window.

[0018] Preferably, the cover plate carrier is provided with an annular platform located on the outer periphery of the cover plate carrier groove, and the annular platform is provided with a plurality of guide pulleys.

[0019] The beneficial effects of this invention are mainly reflected in: 1. It can realize the construction of a cyclic production line, meet the flexible configuration of a wide range of workstations, and provide precise lifting and alignment of each workstation for the workpiece itself, eliminating the difficulties in setting up traditional workstations and the inability to align workpieces on traditional carriers, thus significantly improving the quality of product assembly and welding.

[0020] 2. It features a design that combines lifting and leveling with a drop guide, ensuring a high welding qualification rate and making the production line run more smoothly and stably.

[0021] 3. It meets the flexible addition requirements of the workstation that needs to be connected to the battery cover through the carrier, so that the welding equipment can be adapted to process upgrades and workstations can be added, and the economic value of the equipment is quite significant.

[0022] 4. The overall structure of the circular production line is ingenious, with smooth and stable coordination between each workstation, resulting in stable operation and greatly improving the efficiency of automated welding. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of an automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to the present invention.

[0024] Figure 2 This is a schematic diagram of the cover plate carrier in this invention.

[0025] Figure 3 This is a schematic diagram of the cover plate carrier in use in this invention.

[0026] Figure 4 This is a schematic diagram of the battery cover loading mechanism in this invention.

[0027] Figure 5 This is a schematic diagram of the laser marking mechanism in this invention.

[0028] Figure 6 This is a schematic diagram of the explosion-proof valve transfer mechanism in this invention.

[0029] Figure 7 This is a structural schematic diagram of the explosion-proof valve spot welding station and the explosion-proof valve full welding station in this invention.

[0030] Figure 8 This is a schematic diagram of the welding image detection mechanism in this invention.

[0031] Figure 9 This is a schematic diagram of the battery cover turnover mechanism in this invention.

[0032] Figure 10 This is a schematic diagram of the liquid injection channel detection mechanism in this invention.

[0033] Figure 11 This is a schematic diagram of the cover plate shaping mechanism in this invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0036] This invention provides an automatic welding device for a dual-line rotary battery cover explosion-proof valve, such as... Figures 1 to 11 As shown, the battery cover 100 is used for assembling and welding with the explosion-proof valve 200. The battery cover 100 includes a cover body 110, two spaced-apart pole holes 120 disposed on the cover body 110, and an explosion-proof valve mounting groove 130 located between the two pole holes 120.

[0037] like Figure 1 As shown, the automatic welding equipment for double-line rotary battery cover explosion-proof valve includes a base body 1, a first conveyor line 11 and a second conveyor line 12 arranged parallel to each other on the base body 1. The first conveyor line 11 and the second conveyor line 12 are respectively provided with two conveyor belts 10 arranged at intervals and a number of cover plate carriers 2 arranged along the conveyor belt direction and bridging the two conveyor belts. The cover plate carrier 2 includes a carrier base plate 20 with a cover plate loading groove 21. The carrier base plate 20 is provided with an avoidance window 22 that is opposite to the cover plate loading groove. The first conveyor line and the second conveyor line run in opposite directions.

[0038] The base body 1 is provided with a first carrier return station 111, a battery cover loading station 112, a coding station 113, a barcode scanning station 114, an explosion-proof valve loading and assembly station 115, an explosion-proof valve spot welding station 116, and a first carrier switching station 117 arranged sequentially along the running direction of the first conveyor line 11.

[0039] The base body 1 is provided with a second carrier return station 121, an explosion-proof valve full welding station 122, a welding inspection station 123, a post-weld unloading station 124, and a second carrier switching station 125 arranged sequentially along the running direction of the second conveyor line 12.

[0040] The base body 1 is provided with a first cover plate carrier switching mechanism 131 for switching the position of the cover plate carrier between the first carrier return station 111 and the second carrier switching station 125, a second cover plate carrier switching mechanism 132 for switching the position of the cover plate carrier between the first carrier switching station 117 and the second carrier return station 121, an NG conveyor belt 13 set between the first conveyor line and the second conveyor line, and a qualified product conveyor belt 14 that cooperates with the post-weld unloading station.

[0041] The battery cover loading station 112 includes an automated battery cover conveyor line 1121 and a battery cover loading mechanism 3 for picking up battery covers from the automated battery cover conveyor line and loading them onto a cover carrier at the battery cover loading station.

[0042] The marking station 113 includes a laser marking mechanism 4 for laser marking the battery cover.

[0043] The barcode scanning station 114 includes a barcode scanning mechanism 1140 for scanning the laser code on the battery cover.

[0044] The explosion-proof valve loading and assembly station 115 includes an explosion-proof valve automated supply line and an explosion-proof valve transfer mechanism 5 for picking up explosion-proof valves from the explosion-proof valve automated supply line and transferring them to the explosion-proof valve mounting slot of the battery cover at the explosion-proof valve loading and assembly station.

[0045] The explosion-proof valve spot welding station 116 includes a spot welding table 1161 located at the top of the cover plate carrier and a spot welding positioning support table 1162 located at the bottom of the cover plate carrier with lifting displacement. The spot welding positioning support table 1162 is provided with a spot welding positioning column 1163 for relative positioning and cooperation with the pole hole through the avoidance window.

[0046] The explosion-proof valve full welding station 122 includes a full welding table 1221 located at the top of the cover plate carrier and a full welding positioning support table 1222 located at the bottom of the cover plate carrier with lifting displacement. The full welding positioning support table 1222 is provided with a full welding positioning column 1223 for passing through the avoidance window and positioning relative to the pole hole.

[0047] The welding inspection station 123 includes a welding image inspection mechanism 1230 for inspecting the welded parts on the outer periphery of the explosion-proof valve.

[0048] The post-weld unloading station 124 includes a battery cover turnover mechanism 1240 for turning battery cover between the post-weld unloading station and the NG conveyor belt and between the post-weld unloading station and the qualified product conveyor belt.

[0049] Detailed implementation process and principle explanation: Traditional explosion-proof valve production lines use indexing plates or circulation lines. The positions of the carriers on the indexing plates and circulation lines are relatively fixed, making it difficult to achieve local correction and adjustment. At the same time, their relative work positions are limited by the sink-type carriers, making it difficult to meet the needs of local adjustment, and their relatively fixed work positions make it difficult to expand capacity.

[0050] In this case, a first conveyor line 11 and a second conveyor line 12 are first used to mount a number of cover plate carriers 2. The production line return is realized by using a first cover plate carrier switching mechanism 131 that switches the position of the cover plate carrier between the first carrier return station 111 and the second carrier switching station 125, and a second cover plate carrier switching mechanism 132 that switches the position of the cover plate carrier between the first carrier switching station 117 and the second carrier return station 121.

[0051] Since both the first conveyor line 11 and the second conveyor line 12 have intervals between two conveyor belts 10, and are supplemented by a carrier base plate 20 with a cover plate trough 21 and a clearance window 22, any workstation can be lifted through the intervals and avoid the clearance window 22 for alignment, thereby ensuring the positional accuracy requirements. At the same time, since the first conveyor line 11 and the second conveyor line 12 run in opposite linear directions, it is more flexible to design the addition or removal of workstations on them.

[0052] During actual operation, the automated battery cover conveyor line 1121 supplies battery covers, and the battery cover loading mechanism 3 picks up the supplied battery covers and transfers them to the cover carrier 2 on the battery cover loading station 112, completing the battery cover loading. The first conveyor line 11 performs linear position switching of the cover carrier 2.

[0053] When the battery reaches the coding station, the laser coding mechanism 4 marks the battery cover with a code. Then, after scanning by the coding mechanism 1140 at the coding station 114, the battery is stored in the warehouse and enters the explosion-proof valve loading and assembly station 115. At this point, the explosion-proof valve transfer mechanism 5 picks up the material from the automated supply line and pre-assembles it with the battery cover. After pre-assembly, the battery proceeds to the explosion-proof valve spot welding station 116 for spot welding. During this step, the spot welding positioning support platform 1162 is raised to achieve relative positioning of the spot welding positioning post 1163 through the clearance window and the electrode hole. The battery cover is then lifted to correct its position, ensuring the spot welding accuracy of the spot welding station 1161. Normally, a sensor monitors the relative position of the electrode hole and the spot welding positioning post during the lifting operation. Lifting is only performed when the alignment accuracy is met. This relative position monitoring is existing technology and will not be elaborated further.

[0054] When the battery cover plate 2 is moved to the first carrier switching station 117 along the first conveyor line, the second cover plate carrier switching mechanism 132 picks up the cover plate carrier 2 on the first conveyor line and transfers it to the second carrier return station 121 on the second conveyor line, and the station is switched under the displacement of the second conveyor line. After passing through the explosion-proof valve full welding station 122, welding inspection station 123, and post-weld unloading station 124 in sequence, at the explosion-proof valve full welding station 122, similar to the explosion-proof valve spot welding station 116, the full welding positioning support platform 1222 rises and positions the battery cover plate through the full welding positioning column 1223, and then the full welding table 1221 performs the ring welding operation.

[0055] After the full welding operation is completed, the welding quality is inspected by the welding image inspection agency 1230. The inspection results will be fed back to the post-weld unloading station 124. The battery cover plate turnover mechanism 1240 of the post-weld unloading station 124 will transfer NG products to the NG conveyor belt and qualified products to the qualified product conveyor belt.

[0056] The specific structure and operation description of the first cover plate carrier switching mechanism 131, the second cover plate carrier switching mechanism 132, the barcode scanning mechanism 1140, the welding image detection mechanism 1230, the welding image detection mechanism 1230, and the battery cover plate turnover mechanism 1240 are omitted in the attached drawings.

[0057] The first cover plate carrier switching mechanism 131 and the second cover plate carrier switching mechanism 132 generally adopt a switching position slide with linear displacement and a carrier gripper with lifting displacement. The battery cover plate turnover mechanism 1240 generally adopts a linear displacement slide and a magnetic or negative pressure adsorption end with lifting displacement. Material turnover belongs to existing pick-and-transfer technology and will not be described in detail here. The barcode scanning mechanism 1140 and the welding image detection mechanism 1230 are conventional identification technologies and will not be described in detail here either.

[0058] In one specific embodiment, such as Figure 4 As shown, the battery cover feeding mechanism 3 includes a feeding rack body 31, a battery cover front and back detection part 32 disposed on the feeding rack body 31 and located at the top of the battery cover automated conveyor line, a feeding slide 33 on the feeding rack body with linear switching displacement, and a battery cover picking end 34 disposed on the feeding slide with lifting displacement.

[0059] Specifically, the battery cover is supplied through an automated battery cover conveyor line. The front-end equipment generally has a mechanism to correct the reverse direction, such as flipping. However, in actual operation, misoperation or omission may still cause the battery cover to be reversed. To address this, this embodiment uses a battery cover forward and reverse detection unit 32 to distinguish the forward and reverse directions of the supplied battery cover, thereby ensuring that the picked-up battery cover meets the correct orientation requirements, preventing unexpected production line stoppages, and reducing the scrap rate.

[0060] In one specific embodiment, the feeding slide has switching displacement between the battery cover automated conveyor line and the battery cover feeding station, and switching displacement between the battery cover automated conveyor line and the NG conveyor belt.

[0061] That is, when the reverse is detected, it can directly realize the re-picking operation of the unloading NG. It should be noted that a reverse unloading chamber can also be set on the displacement path of the feeding slide. All design schemes that meet the reverse unloading requirement are within the protection scope of this case.

[0062] It is important to note that the battery cover can be flipped in both the forward and reverse directions, as well as rotated 180° in the opposite direction. Generally, the forward and reverse directions are used for battery removal.

[0063] In this case, there is a preferred solution, namely, the battery cover pickup end 34 has a rotation adjustment displacement. In this preferred solution, when a 180° reversal occurs, it can be corrected by rotating the adjustment displacement. In addition, when there is a certain supply angle deviation when supplying the battery cover, the deviation angle can also be corrected.

[0064] In one specific embodiment, such as Figure 5 As shown, the laser marking mechanism 4 includes a laser marking part 41 located at the top of the cover plate carrier, a marking positioning platform 42 located at the bottom of the cover plate carrier with lifting displacement, a marking positioning column 421 for passing through the avoidance window and positioning relative to the pole hole, and an air extraction and dust removal part 422 for dust extraction.

[0065] Specifically, by lifting and displacing the coding positioning platform 42, high-precision positioning and matching between the coding positioning column 421 and the pole hole can be achieved, thereby meeting the coding position accuracy requirements. The exhaust and dust removal unit 422 on it can discharge the smoke generated by laser coding, effectively preventing the overflow of waste gas.

[0066] In one specific embodiment, such as Figure 6As shown, the explosion-proof valve transfer mechanism 5 includes an explosion-proof valve position detection unit 51 located at the bottom of the feeding end of the explosion-proof valve automated supply line, an explosion-proof valve mounting slot position detection unit 52 located at the top of the cover plate carrier, and an explosion-proof valve transfer unit 53 for transferring the explosion-proof valve according to the detection information of the explosion-proof valve position detection unit and the explosion-proof valve mounting slot position detection unit.

[0067] Specifically, the automated supply line for explosion-proof valves generally adopts a vibratory feeder and direct vibration supply method. Explosion-proof valves will have a certain linearity deviation, that is, a linear positional deviation along the direct vibration track. To address this, the explosion-proof valve positional detection unit 51 can detect the current positional deviation of the supplied explosion-proof valve. At the same time, the explosion-proof valve mounting slot positional detection unit 52 can detect the current positional deviation of the explosion-proof valve mounting slot 130 of the battery cover. The relative displacement stroke is calculated by using the positional deviations of the two units, and the explosion-proof valve transfer unit 53 performs high-precision pre-assembly of the explosion-proof valve to ensure assembly accuracy.

[0068] In detail, such as Figure 6 As shown, the explosion-proof valve transfer mechanism includes an assembly positioning platform 54 with lifting displacement located at the bottom of the cover plate carrier. The assembly positioning platform is provided with an assembly positioning column for relative positioning and cooperation with the pole hole through the clearance window. The explosion-proof valve transfer part 53 is provided with an explosion-proof valve picking part 530 for picking up the explosion-proof valve. The explosion-proof valve picking part has horizontal linear displacement, lifting displacement and rotational displacement.

[0069] Specifically, under normal circumstances, there will be a certain lateral and longitudinal deviation between the position of the explosion-proof valve mounting slot 130 and the position of the supplied explosion-proof valve. Therefore, the traditional explosion-proof valve transfer part 53 needs to perform two linear displacements that are perpendicular to each other in the horizontal plane, and its displacement control response is relatively slow.

[0070] In this case, the design of the assembly positioning table 54 enables high-precision positioning of the battery cover on the cover carrier 2, thereby ensuring the relatively reliable position of the explosion-proof valve mounting slot 130 and reducing the amount of displacement correction in a linear direction of the explosion-proof valve transfer part 53. In addition, the design of rotational displacement gives it the need for fine adjustment correction of the explosion-proof valve angle, thus ensuring the mounting accuracy of the explosion-proof valve.

[0071] In one specific embodiment, such as Figure 7 As shown, the spot welding positioning support platform 1162 and the full welding positioning support platform 1222 are respectively provided with horizontal support rings 6 composed of several elastic support columns 60 for supporting the horizontal position of the battery cover plate.

[0072] Specifically, the flatness of traditional battery cover plates is limited by the carrier. When the carrier itself has a certain deviation or the mounting has a certain tilt deviation, the battery cover plate will have a large level deviation. At this time, spot welding and ring welding can easily cause the product to be scrapped.

[0073] In this embodiment, the guide columns on the spot welding positioning support platform 1162 and the full welding positioning support platform 1222 can achieve pre-alignment and fit with the battery cover. As it is lifted, the horizontal support ring 6 supports the battery cover and separates it from the cover carrier 2. At this time, the levelness of the battery cover is fully guaranteed, which significantly improves the welding accuracy.

[0074] In one specific embodiment, such as Figure 1 and Figure 7 As shown, the base body 1 is provided with a mounting platform 15 located between the first conveyor line and the second conveyor line. The spot welding station and the full welding station are respectively set on the mounting platform, and the spot welding station and the full welding station are respectively provided with lifting and adjusting displacement.

[0075] This satisfies the integration requirements of the explosion-proof valve spot welding station 116 and the explosion-proof valve full welding station 122, making the construction of production line stations more convenient.

[0076] In one specific embodiment, such as Figure 1 , Figure 3 , Figure 10 , Figure 11 As shown, the cover plate body 100 is provided with a liquid injection channel 140. The liquid injection channel 140 is used for the liquid injection requirements of the power battery and generally involves tests such as hole diameter and hole wall smoothness.

[0077] In this case, the base body 1 is provided with a liquid injection channel detection station 118 located between the barcode scanning station 114 and the explosion-proof valve loading and assembly station 115, and a cover plate shaping station 126 located between the welding detection station 123 and the post-weld unloading station 124.

[0078] like Figure 10 As shown, the liquid injection channel inspection station 118 includes a liquid injection channel inspection mechanism 7. The liquid injection channel inspection mechanism 7 includes an illumination light source 71 located at the bottom of the cover plate carrier and a liquid injection channel image inspection unit 72 located at the top of the cover plate carrier and opposite to the illumination light source. Due to the separation design of the conveyor belt 10 and the design of the avoidance window 22, the requirements for online mounting of the liquid injection channel inspection station 118 are met. The light source inspection that penetrates through the illumination can achieve high-precision inspection of the diameter and hole wall.

[0079] like Figure 11 As shown, the cover plate shaping station 126 includes a cover plate shaping mechanism 8. The cover plate shaping mechanism 8 includes a shaping abutment part 81 located at the top of the cover plate carrier and a shaping lifting platform 82 located at the bottom of the cover plate carrier with lifting displacement. The shaping abutment part is provided with two shaping piles 810 arranged at intervals and a shaping image acquisition part facing the battery cover plate located between the two shaping piles. The shaping lifting platform 82 is provided with a lifting shaping block 820 for passing through the avoidance window.

[0080] Specifically, during the shaping operation, the shaping lifting platform 82 lifts the shaping block 820 through the clearance window to lift the battery cover to cooperate with the shaping contact part 81 for shaping. The shaping pile 810 achieves intermittent deformation contact, meeting the support requirements for bending and shaping the battery cover. It should be noted that during the shaping process, the flatness information is collected using the shaping image acquisition unit. The shaping amount is precisely controlled by controlling the stroke and holding time of the shaping lifting platform 82. It should also be noted that during the flatness information collection, the position of the lifting shaping block 820 is also detected, enabling the second conveyor line 12 to make fine adjustments to its position, meeting the alignment accuracy requirements for shaping.

[0081] In one specific embodiment, such as Figure 2 and Figure 3 As shown, the cover plate carrier 2 is provided with an annular platform 210 located on the outer periphery of the cover plate carrier groove 21, and the annular platform 210 is provided with a number of guide pulleys 220.

[0082] Specifically, during operation at each station on the first conveyor line 11 and the second conveyor line 12, the cover plate carrier 2 is configured with a movable bridge. When the first cover plate carrier switching mechanism 131 and the second cover plate carrier switching mechanism 132 are rotating cyclically, the support of the conveyor belt 10 cannot guarantee the accuracy of the cover plate carrier 2 itself. Therefore, when there is a need for precise alignment during lifting, the position of the battery cover is adjusted by positioning columns, or the position and flatness of the battery cover is adjusted by lifting and removing it from the cover plate carrier 2. Thus, the battery cover needs to be positioned in the cover plate carrier groove 2. The battery cover has a certain displacement adjustment range. The ring platform 210 is designed to meet the displacement adjustment requirements. When the battery cover is lifted and falls back onto the cover carrier 2, it may also have some deviation or tilt. Therefore, a guide pulley 220 is designed on the ring platform 210 to guide its position when the battery cover falls back, ensuring that it falls back into the cover carrier 21. In this way, the battery covers on the entire production line are stably mounted in the cover carrier 21 and operate reliably, maintaining the stable and reliable operation of the entire production line.

[0083] The above description demonstrates that the system enables the construction of a circular production line, accommodating a wide range of flexible workstations and providing precise lifting and alignment for each workstation, eliminating the difficulties in traditional workstation setups and the inability to precisely align workpieces on traditional carriers. This significantly improves the quality of product assembly and welding. The system features a lifting, leveling, and guide design that ensures a high welding pass rate while making the production line run more smoothly and stably. It also allows for the flexible addition of workstations that require alignment and coordination with battery covers through the carrier, enabling the welding equipment to adapt to process upgrades and the addition of workstations, resulting in significant economic value. The overall circular production line is cleverly constructed, with smooth and stable coordination between workstations, resulting in stable operation and greatly improving the efficiency of automated welding.

[0084] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0085] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles 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 such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A double-line rotary automatic welding equipment for battery cover explosion-proof valves, used for assembling and welding battery cover plates and explosion-proof valves, wherein the battery cover plate includes a cover plate body, two spaced-apart pole holes disposed on the cover plate body, and an explosion-proof valve mounting groove located between the two pole holes, characterized in that: The system includes a base body, a first conveyor line and a second conveyor line arranged parallel to each other on the base body, the first conveyor line and the second conveyor line are respectively provided with two conveyor belts arranged at intervals and a plurality of cover plate carriers arranged along the direction of the conveyor belts and movably bridging the two conveyor belts, the cover plate carriers include a carrier base plate having a cover plate groove, the carrier base plate having a clearance window opposite to the cover plate groove, and the first conveyor line and the second conveyor line running in opposite directions; Both the first and second conveyor lines have intervals between two conveyor belts, allowing any workstation to be lifted through the intervals and avoid the openings for alignment. The base body is provided with a first carrier return station, a battery cover loading station, a coding station, a barcode scanning station, an explosion-proof valve loading and assembly station, an explosion-proof valve spot welding station, and a first carrier switching station arranged sequentially along the running direction of the first conveyor line. The base body is provided with a second carrier return station, an explosion-proof valve full welding station, a welding inspection station, a post-weld unloading station, and a second carrier switching station arranged sequentially along the running direction of the second conveyor line. The base body is provided with a first cover plate carrier switching mechanism for switching the position of the cover plate carrier between the first carrier return station and the second carrier switching station, a second cover plate carrier switching mechanism for switching the position of the cover plate carrier between the first carrier switching station and the second carrier return station, an NG conveyor belt disposed between the first conveyor line and the second conveyor line, and a qualified product conveyor belt that cooperates with the post-weld unloading station; The battery cover loading station includes an automated battery cover conveyor line and a battery cover loading mechanism for picking up battery covers from the automated battery cover conveyor line onto the cover carrier at the battery cover loading station. The marking station includes a laser marking mechanism for laser marking the battery cover. The barcode scanning station includes a barcode scanning mechanism for scanning the laser code on the battery cover. The explosion-proof valve loading and assembly station includes an automated explosion-proof valve supply line and an explosion-proof valve transfer mechanism for picking up explosion-proof valves from the automated supply line and transferring them to the explosion-proof valve mounting slot of the battery cover at the explosion-proof valve loading and assembly station. The explosion-proof valve spot welding station includes a spot welding table located at the top of the cover plate carrier and a spot welding positioning support platform with lifting displacement located at the bottom of the cover plate carrier. The spot welding positioning support platform is provided with a spot welding positioning post for relative positioning and cooperation with the pole hole through the clearance window. The explosion-proof valve full welding station includes a full welding platform located at the top of the cover plate carrier and a full welding positioning support platform with lifting displacement located at the bottom of the cover plate carrier. The full welding positioning support platform is provided with a full welding positioning column for relative positioning and cooperation with the pole hole through the clearance window. The welding inspection station includes a welding image inspection mechanism for inspecting the welded parts on the outer periphery of the explosion-proof valve. The post-weld unloading station includes a battery cover turnover mechanism for rotating battery cover between the post-weld unloading station and the NG conveyor belt and between the post-weld unloading station and the qualified product conveyor belt. The spot welding positioning support platform and the full welding positioning support platform are respectively provided with a horizontal support ring composed of several elastic support columns to support the horizontal position of the battery cover plate. The cover plate body is provided with a liquid injection channel. The base body is equipped with a liquid injection channel detection station located between the barcode scanning station and the explosion-proof valve loading and assembly station, and a cover plate shaping station located between the welding detection station and the post-weld unloading station. The injection channel detection station includes an injection channel detection mechanism, which includes an illumination light source located at the bottom of the cover plate carrier and an injection channel image detection unit located at the top of the cover plate carrier and opposite to the illumination light source. The cover plate shaping station includes a cover plate shaping mechanism, which includes a shaping abutment part located at the top of the cover plate carrier and a shaping lifting platform with lifting displacement located at the bottom of the cover plate carrier. The shaping abutment part is provided with two shaping posts arranged at intervals and a shaping image acquisition part located between the two shaping posts and facing the battery cover plate. The shaping lifting platform is provided with a lifting shaping block for passing through the avoidance window.

2. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to claim 1, characterized in that: The battery cover feeding mechanism includes a feeding rack body, a battery cover front and back detection unit located on the feeding rack body and at the top of the battery cover automated conveyor line, a feeding slide with linear switching displacement on the feeding rack body, and a battery cover picking end with lifting displacement located on the feeding slide.

3. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to claim 2, characterized in that: The feeding slide has a switching displacement between the battery cover automated conveyor line and the battery cover feeding station, and a switching displacement between the battery cover automated conveyor line and the NG conveyor belt.

4. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to claim 1, characterized in that: The laser marking mechanism includes a laser marking section located on the top of the cover plate carrier, a marking positioning platform with lifting displacement located at the bottom of the cover plate carrier, a marking positioning column for passing through the clearance window and positioning relative to the pole hole on the marking positioning platform, and an air extraction and dust removal section for dust extraction.

5. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to claim 1, characterized in that: The explosion-proof valve transfer mechanism includes an explosion-proof valve position detection unit located at the bottom of the feeding end of the explosion-proof valve automated supply line, an explosion-proof valve mounting slot position detection unit located at the top of the cover plate carrier, and an explosion-proof valve transfer unit for rotating the explosion-proof valve based on the detection information from the explosion-proof valve position detection unit and the explosion-proof valve mounting slot position detection unit.

6. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to claim 5, characterized in that: The explosion-proof valve transfer mechanism includes an assembly positioning platform with lifting displacement located at the bottom of the cover plate carrier. The assembly positioning platform is provided with an assembly positioning post for relative positioning and engagement with the pole hole through the clearance window. The explosion-proof valve transfer unit includes an explosion-proof valve picking unit for picking up the explosion-proof valve, and the explosion-proof valve picking unit has horizontal linear displacement, lifting displacement and rotational displacement.

7. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to claim 1, characterized in that: The base body is provided with a mounting platform located between the first conveyor line and the second conveyor line. The spot welding station and the full welding station are respectively mounted on the mounting platform, and the spot welding station and the full welding station are respectively provided with lifting and adjusting displacement.

8. The automatic welding equipment for a double-line rotary battery cover explosion-proof valve according to any one of claims 1 to 7, characterized in that: The cover plate carrier is provided with a ring platform located on the outer periphery of the cover plate carrier groove, and the ring platform is provided with a number of guide pulleys.

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