Module magnetic suspension variable pitch welding equipment and module welding method

Abstract

The invention provides module magnetic suspension variable-pitch welding equipment and a module welding method.The module magnetic suspension variable-pitch welding equipment comprises a recognition welding mechanism, the recognition welding mechanism comprises an adjusting frame, a welder and a shooting camera, and the interior of the adjusting frame is a welding space; a transmission line body; the jacking mechanism comprises a second-stage jacking assembly and a supporting table, the second-stage jacking assembly comprises a driving part and a driven part, the driving part comprises a first-stage jacking inclined plane and a second-stage jacking inclined plane, and the driven part comprises a driven frame and rolling wheels; the variable-pitch protection mechanism comprises a fixing frame and a plurality of protection positioning assemblies, a magnetic rail is arranged on the fixing frame, and each protection positioning assembly comprises a magnetic suspension rotor and a plurality of copper nozzles. Compared with an existing conventional welding technology, the automatic welding device has the advantages of being high in automation degree, high in controllability, wide in application range, high in machining precision, high in welding efficiency, stable in welding quality and the like, and brand-new automatic equipment is provided for module machining.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of module processing, and particularly relates to a module magnetic suspension variable-distance welding device and a module welding method. BACKGROUND

[0002] In the assembly and production process of a power battery module, a plurality of battery cells are arranged in sequence, and a separator is embedded in the gap between adjacent battery cells. In the subsequent welding process of the pole and the copper bar, the copper nozzle of the welding device needs to be accurately aligned with the pole of each battery cell to ensure the penetration, welding point strength and electrical connection reliability of the welding.

[0003] However, the position deviation of the pole of the battery cell caused by the thickness of the module separator or the assembly deviation of the battery cell itself causes the copper nozzle that supplies protective gas to fail to accurately position all the poles during welding, thereby frequently causing the phenomenon of "offset welding", that is, the welding point deviates from the center of the pole, which not only reduces the welding strength, but also may increase the contact resistance between the pole and the copper bar, thereby affecting the overall performance of the module.

[0004] At present, the industry mainly adopts the one-by-one calibration method, that is, the device detects and adjusts the single point before welding, but this method is extremely low in efficiency and cannot meet the needs of large-scale and automatic production of the power battery module. Some enterprises try to improve the manufacturing precision of the separator and optimize the control of the pre-tightening force of the module, but due to the tolerance of the battery cell, the assembly process and other factors, the position deviation of the pole and the inaccurate positioning of the copper nozzle have not been effectively solved, which has become a key technical bottleneck affecting the production efficiency, product quality and reliability of the power battery module. SUMMARY

[0005] Therefore, the present application aims to solve the problem that the pole and the copper nozzle cannot be accurately matched during the welding of the module in the prior art, and provides a module magnetic suspension variable-distance welding device and a module welding method.

[0006] To solve the above technical problems, the application provides a modular magnetic suspension variable-distance welding device, which comprises a recognition welding mechanism, a transmission line body, a jacking mechanism and a variable-distance protection mechanism.

[0007] In an embodiment of the application, the jacking mechanism further comprises an assembly table, wherein the assembly table is provided with at least one guide module extending in the first direction, and the bottom of the driving member is provided with a sliding block which is slidingly connected to the guide module.

[0008] In an embodiment of the application, the support table is provided with a positioning pin, side blocks and a guide column, wherein the positioning pin protrudes from the upper surface of the support table and can be inserted into a positioning hole in the bottom of the to-be-welded module, a plurality of side blocks are arranged at the edges of the support table in the second direction, and the guide column extends in the height direction of the jacking mechanism, one end of the guide column is connected to the support table, and the other end of the guide column is slidingly inserted into the assembly table.

[0009] In one embodiment of the present application, the driving member further comprises a first buffer surface and a second buffer surface, both of which extend along the first direction, wherein the two ends of the first buffer surface are in communication with the top end of the first jacking inclined surface and the bottom end of the second jacking inclined surface respectively, and the second buffer surface is in communication with the top end of the second jacking inclined surface, and the driven member can support the buffer on the first buffer surface or the second buffer surface.

[0010] In one embodiment of the present application, the second jacking assembly comprises at least two driving members, at least two driven members, a connecting frame and a driver, the at least two driving members and the at least two driven members are arranged one by one, the driver is arranged at one end of the connecting frame, and the driving members are all connected to the connecting frame to move synchronously along the first direction by the driver.

[0011] In one embodiment of the present application, the jacking mechanism further comprises two limiting assemblies, both of which are arranged at the two ends of the support table in the first direction, and any of the limiting assemblies comprises a stop driving device and a stop pin, the stop pin is arranged at the power output end of the stop driving device and moves along the height direction of the jacking mechanism to stop / avoid the support table.

[0012] In one embodiment of the present application, the protective positioning assembly further comprises a linkage plate and a heat insulation plate, the linkage plate is connected to the magnetic levitation rotor, the heat insulation plate is connected to the linkage plate and extends along the horizontal direction, and the copper nozzle is arranged at the middle part of the heat insulation plate.

[0013] In one embodiment of the present application, the protective positioning assembly further comprises a floating assembly frame and a plurality of elastic members, the floating assembly frame is arranged on the heat insulation plate, and the plurality of elastic members are connected between the floating assembly frame and the copper nozzle respectively.

[0014] In one embodiment of the present application, the variable distance protection mechanism further comprises a plurality of gas transmission pipelines and a plurality of flow valves, the plurality of gas transmission pipelines are in communication with the plurality of copper nozzles respectively, and the plurality of flow valves are arranged on the plurality of gas transmission pipelines one by one.

[0015] In one embodiment of the present application, the adjusting frame comprises a first horizontal module, a second horizontal module, a lifting carriage and a mounting base frame, the second horizontal module extends along the second direction, the first horizontal module is slidingly connected to the second horizontal module and extends along the first direction, the lifting carriage is slidingly connected to the first horizontal module and is provided with a lifting module thereon, and the mounting base frame is slidingly connected to the lifting module, and the welding device and the shooting camera are both arranged on the mounting base frame.

[0016] In one embodiment of the present application, the modular magnetic suspension variable-distance welding device further comprises a mounting plate and at least two pedestals, the identification welding mechanism is supported on the mounting plate, the mounting plate is provided with at least two machining stations, any of the machining stations is provided with a transmission line body, the jacking mechanism and the variable-distance protection mechanism, and the pedestals are arranged in one-to-one correspondence with the machining stations.

[0017] In one embodiment of the present application, the modular magnetic suspension variable-distance welding device further comprises a control mechanism, and the welding device, the shooting camera, the jacking mechanism and the variable-distance protection mechanism are respectively connected to the control mechanism.

[0018] The present application also provides a modular welding method, which uses the above-mentioned modular magnetic suspension variable-distance welding device for modular welding processing, which comprises the following steps: S1, transmitting a to-be-welded module into a welding space; S2, first jacking the to-be-welded module to make it separate from the transmission line body; S3, shooting and identifying the mark points on the to-be-welded module to determine the pole column distance on the module; S4, adjusting the position of the protection positioning assembly according to the pole column distance, so that the plurality of copper mouths on the protection positioning assembly correspond to the pole columns on the to-be-welded module in the vertical direction one by one; S5, second jacking the to-be-welded module until the pole columns on the to-be-welded module respectively abut against the corresponding copper mouths; and S6, sequentially welding a plurality of to-be-welded pole columns while supplying protection gas to the welding sites through the copper mouths to complete the modular welding processing.

[0019] In one embodiment of the present application, the to-be-welded module is second jacked by the jacking mechanism, in step S2, the driving member is first moved in the first direction, and then the driven member is moved to the first buffer surface along the first jacking slope; and in step S5, the driving member is second moved in the first direction, and then the driven member is moved to the second buffer surface along the second jacking slope.

[0020] In one embodiment of the present application, step S5 specifically comprises: second jacking the to-be-welded module by the jacking mechanism until the pole columns on the to-be-welded module respectively abut against the bottom surfaces of the corresponding copper mouths, and in this process, the elastic member is gradually compressed at the top of the copper mouth to form a buffer for the compression process of the copper mouth.

[0021] The above technical solutions of the present application have the following advantages compared with the prior art: The modular magnetic levitation variable-pitch welding equipment and method described in this invention transports the module to be welded via a transmission line. A lifting mechanism performs a secondary lifting of the module. The first lifting, in conjunction with a camera, identifies the position of the module's electrode post. Then, a variable-pitch protection mechanism adjusts the position of the protective positioning component, achieving a one-to-one correspondence between the copper nozzle and the battery cell electrode post. A second lifting by the lifting mechanism ensures a tight fit between the module and the copper nozzle, providing a welding reference and supplying protective gas to the welder. Finally, welding is performed by the welder, achieving a high-precision welding process. Compared to existing conventional welding technologies, this application offers advantages such as high automation, strong controllability, wide applicability, high processing accuracy, high welding efficiency, and stable welding quality, providing a novel automated equipment for module processing. Attached Figure Description

[0022] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the module magnetic levitation variable pitch welding equipment in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A three-dimensional structural diagram of the identification welding mechanism in the magnetic levitation variable pitch welding equipment shown in the figure; Figure 3 yes Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 yes Figure 1 A three-dimensional structural diagram of the transmission line and lifting mechanism in the magnetic levitation variable pitch welding equipment shown in the figure. Figure 5 yes Figure 1 A three-dimensional structural diagram of the lifting mechanism in the magnetic levitation variable pitch welding equipment shown in the figure; Figure 6 yes Figure 5 Enlarged structural diagram at point B; Figure 7 yes Figure 1 A three-dimensional structural diagram of the pitch protection mechanism in the magnetic levitation pitch welding equipment shown. Figure 8 It is part Figure 1 A three-dimensional structural diagram of the pitch protection mechanism in the magnetic levitation pitch welding equipment shown. Figure 9 yes Figure 7 Enlarged structural diagram at point C.

[0024] Description of the drawings: 100, mounting plate; 200, identification welding mechanism; 210, adjusting frame; 211, first horizontal module; 212, second horizontal module; 213, lifting carriage; 214, lifting module; 215, mounting base frame; 216, 3D camera; 220, welder; 230, shooting camera; 300, transmission line body; 400, jacking mechanism; 410, assembly table; 411, guide module; 420, secondary jacking assembly; 421, driving piece; 4211, primary jacking slope; 4212, primary buffer surface; 4213, secondary jacking slope; 4214, secondary buffer surface; 4215, sliding block; 422, driven piece; 4221, driven frame; 4222, roller; 423, connecting frame; 424, driver; 430, support table; 431, positioning pin; 432, side stop block; 433, guide column; 440, limiting assembly; 441, stop driver; 442, stop pin; 500, variable distance protection mechanism; 510, fixed frame; 511, magnetic track; 520, protection positioning assembly; 521, magnetic levitation mover; 522, linkage plate; 523, heat insulation plate; 524, copper nozzle; 525, elastic piece; 526, floating assembly frame; 530, gas transmission pipeline; 531, flow valve; 600, stepping platform; 700, to-be-welded module; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. The embodiments are not intended to limit the present application.

[0026] Embodiment one:

[0027] Reference Figure 1As shown, the embodiment provides a modular magnetic suspension variable distance welding device, which comprises a recognition welding mechanism 200, the recognition welding mechanism 200 comprises an adjusting frame 210, a welding device 220 and a shooting camera 230, the inside of the adjusting frame 210 is a welding space, the welding device 220 and the shooting camera 230 are both slidingly connected to the adjusting frame 210 and move in the welding space; a transmission line body 300, the transmission line body 300 penetrates through the welding space along a first direction, a to-be-welded module 700 moves into the welding space through the transmission line body 300; a jacking mechanism 400, the jacking mechanism 400 is arranged on the extension path of the transmission line body 300, which comprises a two-stage jacking assembly 420 and a supporting table 430, the two-stage jacking assembly 420 comprises a driving member 421 and a driven member 422, the driving member 421 and the driven member 422 can move relatively along the first direction, wherein the driving member 421 is arranged below the transmission line body 300, which comprises a first-stage jacking slope 4211 and a second-stage jacking slope 4213 which extend obliquely along the height direction of the driving member 421 in the first direction, and the top end of the first-stage jacking slope 4211 is communicated with the bottom end of the second-stage jacking slope 4213, the driven member 422 comprises a driven frame 4221 and a roller 4222, the roller 4222 is rotationally connected to the bottom of the driven frame 4221 and rolls on the first-stage jacking slope 4211 or the second-stage jacking slope 4213 of the driving member 421 to drive the driven frame 4221 to move up and down, the supporting table 430 is connected to the top surface of the driven frame 4221 to jack the to-be-welded module 700; a variable distance protection mechanism 500, the variable distance protection mechanism 500 comprises a fixed frame 510 and a plurality of protection positioning assemblies 520, the fixed frame 510 is arranged on one side of the transmission line body 300 and is provided with a magnetic track 511 thereon, any protection positioning assembly 520 comprises a magnetic suspension rotor 521 and a plurality of copper nozzles 524 which are connected to each other, the magnetic suspension rotor 521 is slidingly connected to the magnetic track 511 to adjust the interval distance between adjacent protection positioning assemblies 520, the copper nozzles 524 can abut against the to-be-welded module 700, and the welding device 220 contacts the to-be-welded pole through the copper nozzles 524.

[0028] The modular magnetic suspension variable-distance welding device described in the embodiment can transport the to-be-welded module 700 through the transmission line body 300, and the jacking mechanism 400 can perform secondary jacking on the to-be-welded module 700, wherein the first jacking is used to cooperate with the shooting camera 230 to identify the position of the module pole, and then the variable-distance protection mechanism 500 is used to correspondingly adjust the position of the protection positioning assembly 520, so as to realize the one-to-one corresponding structure of the copper nozzle 524 and the battery pole, and then the second jacking of the jacking mechanism 400 is used to realize the close fit between the to-be-welded module 700 and the copper nozzle 524, so as to provide a welding reference for the welder 220 and supply protection gas, and finally the welder 220 is used for welding, so as to realize the high-precision processing welding process.

[0029] It should be noted that, for the convenience of description, the transmission direction of the transmission line body 300 is defined as the first direction X, the width direction of the modular magnetic suspension variable-distance welding device is defined as the second direction Y, and the height direction of the modular magnetic suspension variable-distance welding device is defined as the third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other, and the first direction X and the second direction Y are located in the same plane.

[0030] Referring to Figure 2 and Figure 3 In the embodiment, the identification welding mechanism 200 is the core structure for realizing module identification and accurate welding of the device, which cooperates with the adjusting frame 210, the welder 220 and the shooting camera 230 to complete the pole positioning and final welding operation of the to-be-welded module 700, wherein the adjusting frame 210 is the mounting and moving carrier of the welder 220 and the shooting camera 230, and the welding space reserved in the adjusting frame 210 provides a closed and suitable working area for subsequent processes such as feeding of the transmission line body 300, jacking of the module by the jacking mechanism 400, positioning of the variable-distance protection mechanism 500, etc. At the same time, the adjusting frame 210 can provide a stable moving path for the welder 220 and the shooting camera 230, so as to ensure that the welder 220 and the shooting camera 230 can be flexibly adjusted in position in the welding space along multiple directions such as horizontal and vertical directions, and adapt to the welding requirements of modules of different sizes.

[0031] Specifically, referring to Figure 4As shown, the adjusting frame 210 in the embodiment includes a first horizontal module 211, a second horizontal module 212, a lifting carriage 213, and a mounting base 215. The second horizontal module 212 extends in the second direction, the first horizontal module 211 is slidingly connected to the second horizontal module 212 and extends in the first direction, the lifting carriage 213 is slidingly connected to the first horizontal module 211 and is provided with a lifting module 214 thereon, and the mounting base 215 is slidingly connected to the lifting module 214. The welding device 220 and the camera 230 are arranged on the mounting base 215. The second horizontal module 212 serves as a basic guide structure of the adjusting frame 210 and provides sliding support for the first horizontal module 211. The first horizontal module 211 can drive the subsequent components to move synchronously in the second direction, thereby achieving position adjustment in the horizontal plane perpendicular to the conveying direction. The lifting carriage 213 is slidingly connected to the first horizontal module 211 and can move in the first direction to adjust the horizontal position parallel to the conveying direction. The lifting module 214 arranged on the lifting carriage 213 can convert rotary power into linear lifting power. The mounting base 215 is slidingly connected to the lifting module 214 and can be driven by the lifting module 214 to achieve height adjustment in the vertical direction. The welding device 220 and the camera 230 are both fixed on the mounting base 215. Through the linkage of the modules, the welding device 220 and the camera 230 can be flexibly and accurately displaced in the horizontal and vertical directions to adapt to the pole positioning and identification and welding operation requirements of the welding module 700 of different sizes.

[0032] Further, after the camera 230 performs shooting identification, the 3D camera 216 arranged on the other side of the mounting base 215 can be used for height detection to further improve the welding precision by determining the actual welding height of the pole.

[0033] In the embodiment, the welding device 220 is the welding execution component of the device, and its core function is to output welding energy. The energy output end of the welding device 220 is coaxially aligned with the middle avoiding through hole of the copper nozzle 524 through cooperation with the copper nozzle 524 of the variable distance protection mechanism 500. After the copper nozzle 524 is accurately connected with the pole to be welded, the welding device 220 can accurately transmit energy to the pole welding area, thereby realizing metal fusion. In addition, the welding device 220 can slide with the adjusting frame 210 to further fine-tune the welding position, compensate for small positioning deviations, and ensure the welding precision.

[0034] The shooting camera 230 is used as a visual identification sensor of the pole position, mainly for shooting and identifying the mark point at the end of the module 700 to be welded, so as to collect the pole position information thereon. When the jacking mechanism 400 jacks the module for the first time, the shooting camera 230 moves to the upper side of the end of the module with the adjusting frame 210, captures the mark point of the module by high-definition imaging, and transmits the position data to the equipment control system. The control system calculates the parameters that the variable-distance protection mechanism 500 needs to adjust according to the data, so as to provide accurate basis for the distance adjustment of the subsequent protection positioning assembly 520, and avoid welding misplacement caused by module assembly error.

[0035] Referring to Figure 2 The transmission line body 300 is the basis for the equipment to realize continuous production, and its core function is to directionally and stably transport the module 700 to be welded. The transmission line body 300 is connected to the external production line at both ends, and can accurately stop the module above the jacking mechanism 400. After the positioning identification and variable-distance adjustment are completed, the jacking mechanism 400 is actuated to ensure that the module remains stable during the welding process, and to avoid the influence of transportation deviation on the welding precision.

[0036] Referring to Figure 5 and Figure 6 The jacking mechanism 400 cooperates with the support table 430 through the secondary jacking assembly 420 to realize twice jacking of the module 700 to be welded, and serves the pole positioning identification and welding lamination, respectively. The driving member 421 is fixed to the power output end below the transmission line body 300, and the first jacking slope 4211 and the second jacking slope 4213 on the surface thereof are the key structures for realizing the step jacking. The first jacking slope 4211 can drive the driven member 422 to slowly rise to the positioning identification height, so that the mark point of the module is just in the clear imaging range of the shooting camera 230, and the pole does not contact the copper nozzle 524 of the variable-distance protection mechanism 500. The second jacking slope 4213 can drive the driven member 422 to further rise to the welding lamination height, so that the pole of the module tightly abuts against the copper nozzle 524, and provides a stable reference for welding. Meanwhile, the top end of the first jacking slope 4211 is communicated with the bottom end of the second jacking slope 4213, so that the roller 4222 of the driven member 422 can smoothly transition, and avoid jamming during the jacking process.

[0037] Further, the driving member 421 further includes a first buffer surface 4212 and a second buffer surface 4214, both of which extend along the first direction. The two ends of the first buffer surface 4212 are respectively communicated with the top end of the first jacking slope 4211 and the bottom end of the second jacking slope 4213, the second buffer surface 4214 is communicated with the top end of the second jacking slope 4213, and the driven member 422 can support the buffer on the first buffer surface 4212 or the second buffer surface 4214.

[0038] Specifically, in the driving part 421 of the module magnetic suspension variable pitch welding equipment jacking mechanism 400, the first-level cache surface 4212 and the second-level cache surface 4214 are key auxiliary structures for ensuring smooth transition of the jacking action and realizing accurate stopping of the module. Both extend along the first direction and form orderly connection with the jacking slope. The two ends of the first-level cache surface 4212 are respectively communicated with the top end of the first-level jacking slope 4211 and the bottom end of the second-level jacking slope 4213. When the roller 4222 of the driven part 422 rolls along the first-level jacking slope 4211 to the top end, it will smoothly transition to the first-level cache surface 4212. At this time, the driven part 422 and the connected support table 430 and the module to be welded 700 will be stably supported on the first-level cache surface 4212. This state corresponds to the first jacking stop position of the jacking mechanism 400, which can keep the module at a fixed positioning and recognition height, provide a stable shooting environment for the camera 230 to capture the pole position, avoid the shaking of the module caused by incomplete stopping of the jacking action, and ensure the accuracy of the pole position recognition. The second-level cache surface 4214 is communicated with the top end of the second-level jacking slope 4213. When the roller 4222 of the driven part 422 rolls along the second-level jacking slope 4213 to the top end, it will transition to the second-level cache surface 4214, so that the driven part 422, the support table 430 and the module are stably supported on the surface. This state corresponds to the second jacking stop position of the jacking mechanism 400, which can accurately fix the module at the welding and adhering height, ensure that the copper nozzle 524 tightly abuts against the pole and keeps the position stable, provide a reliable reference for the subsequent welding of the welding device 220, and avoid the influence of the module height deviation on the welding precision during the welding process. Thus, the first-level cache surface 4212 and the second-level cache surface 4214 provide stable support and stopping areas, realize the staged stopping of the jacking process, provide stable height references for pole positioning and recognition and welding and adhering, and are important structures for ensuring the accurate implementation of the functions of the jacking mechanism 400.

[0039] Further, the jacking mechanism 400 in the embodiment further comprises an assembly table 410, the assembly table 410 is provided with at least one guide module 411 extending in the first direction, and the bottom of the driving member 421 is provided with a sliding block 4215 which is slidingly connected to the guide module 411. In the jacking mechanism 400 of the module magnetic levitation variable-pitch welding device in the embodiment, the assembly table 410 is the installation bearing and movement guide basis of the driving member 421, and its core role is to provide stable support and precise guide constraint for the movement of the driving member 421 through the integrated guide module 411: as the fixed base of the jacking mechanism 400, the assembly table 410 provides the installation reference for the entire secondary jacking assembly 420 on the one hand, ensures that the relative positions of the components remain stable on the same horizontal plane, and avoids the deviation of the jacking action caused by the shaking of the base; on the other hand, the at least one guide module 411 extending in the first direction provided on the assembly table 410 forms a sliding fit structure with the sliding block 4215 at the bottom of the driving member 421, when the driving member 421 needs to move in the first direction to drive the roller 4222 of the driven member 422 to roll on the jacking slope, the sliding block 4215 can slide smoothly along the guide module 411, and through the limiting action of the guide module 411 on the sliding block 4215, the movement trajectory of the driving member 421 is strictly constrained, preventing the driving member 421 from deviating in the horizontal direction during movement, ensuring the precise controllability of the relative movement between the driving member 421 and the driven member 422, and further ensuring the accuracy of the lifting height of the support table 430, avoiding the inaccuracy of the module jacking height caused by the deviation of the movement of the driving member 421, and affecting the precision of the subsequent pole positioning identification or copper nozzle 524 fitting welding.

[0040] The driven member 422 in the embodiment is a transmission unit connecting the support table 430 and the driving member 421, which converts the horizontal relative movement of the driving member 421 into the vertical lifting of the driven frame 4221 through the roller 4222 rotatingly connected at the bottom, when the driving member 421 moves in the first direction, the roller 4222 rolls on the inclined jacking slope, and due to the change of the height of the slope, the driven frame 4221 is lifted synchronously. The rotation design of the roller 4222 can reduce the friction with the slope of the driving member 421, and improve the stability and service life of the jacking action.

[0041] The support table 430 is the direct carrier of the module stable support, which is connected to the top surface of the driven frame 4221. During the first jacking, the support table 430 lifts the module to the positioning identification height, and cooperates with the shooting camera 230 to complete the pole position capture; during the second jacking, the support table 430 lifts the module to the welding fitting height, so that the pole and the copper nozzle 524 of the variable-pitch protection mechanism 500 are in close contact, ensuring the coaxiality of the copper nozzle 524 and the pole, and providing a precise welding reference for the welding device 220.

[0042] Further, the support table 430 in the embodiment is provided with a positioning pin 431, a side stopper 432 and a guide column 433. The positioning pin 431 protrudes from the upper surface of the support table 430 and can be inserted into the positioning hole at the bottom of the module to be welded. The side stopper 432 is arranged at the edge of the support table 430 in the second direction. The guide column 433 extends along the height direction Z of the jacking mechanism 400, with one end connected to the support table 430 and the other end slidingly inserted into the assembly table 410. The positioning pin 431 serves as the positioning anchor point at the bottom of the module, protrudes from the upper surface of the support table 430, and can be accurately inserted into the pre-set positioning hole at the bottom of the module to be welded when the transmission line body 300 transports the module to above the support table 430. The module is prevented from shifting in the first direction X and the second direction Y on the surface of the support table 430 by mechanical insertion, avoiding the module from shifting due to vibration or external force during the jacking process, ensuring that the pole of the module is always within the recognition range of the camera 230 and on the docking path of the copper nozzle 524, and providing a basic position guarantee for subsequent positioning recognition and welding. The side stopper 432 serves as an auxiliary limiting barrier in the horizontal direction of the module, and multiple side stoppers 432 are arranged along the edge of the support table 430 in the second direction Y. The side stopper 432 can guide the module to accurately fall into the pre-set area of the support table 430 during the process of transporting the module to the support table 430 by the transmission line body 300, playing a role in pre-positioning. On the other hand, the side stopper 432 can further limit the displacement of the module in the second direction Y during the jacking and welding process, supplementing the limiting effect of the positioning pin 431, especially for modules without positioning holes or with insufficient positioning hole accuracy. The cooperation of the side stopper 432 and the positioning pin 431 can achieve more reliable horizontal positioning. The guide column 433 serves as a vertical guide rod for the lifting of the support table 430, extending along the height direction Z of the jacking mechanism 400, with one end fixedly connected to the support table 430 and the other end slidingly inserted into the assembly table 410. When the secondary jacking assembly 420 drives the support table 430 to lift, the guide column 433 can smoothly slide along the pre-set channel of the assembly table 410, limiting the horizontal shaking or tilting of the support table 430 during the lifting process through its rigid structure, ensuring that the support table 430 always remains horizontal, avoiding the displacement of the pole of the module due to the tilting of the support table 430, and thus ensuring the accuracy of the positioning recognition of the camera 230 and the stability of the welding of the copper nozzle 524. The guide column 433 is a core guide component for the smooth and accurate lifting of the support table 430.

[0043] Specifically, the secondary jacking assembly 420 in the embodiment includes at least two driving members 421, at least two driven members 422, a connecting frame 423, and a driver 424. The at least two driving members 421 and the at least two driven members 422 are one-to-one correspondingly arranged, the driver 424 is arranged at one end of the connecting frame 423, the driving members 421 are all connected to the connecting frame 423, and the driving members 421 are synchronously moved along the first direction X by the driver 424. Compared with the structure of a single driving member 421 and a single driven member 422, multiple sets of corresponding designs can provide jacking force from different positions of the support table 430, so as to avoid the inclination of the support table 430 caused by single-point force. Each set of driving members 421 converts horizontal movement into vertical lifting of the driven member 422 by cooperation of the primary jacking slope 4211, the secondary jacking slope 4213 of the driving member 421, and the roller 4222 of the corresponding driven member 422. The synchronous action of multiple sets of structures can ensure that the lifting heights of all points of the support table 430 are consistent, further improve the horizontal stability during the jacking process of the module, and prevent the module from deviating due to uneven support. The connecting frame 423 is used for integrating the at least two driving members 421 into one whole. By fixedly connecting all the driving members 421 to the connecting frame 423, it can be ensured that the relative positions of the driving members 421 remain unchanged during movement, so as to avoid the misalignment of multiple sets of driving members 421 and driven members 422 caused by displacement deviation of a single driving member 421, and lay a structural foundation for subsequent synchronous jacking. The driver 424, as a power output source of the secondary jacking assembly 420, is preferably a linear motor, which is arranged at one end of the connecting frame 423 and can output linear driving force. When the driver 424 is started, the connecting frame 423 is moved along the first direction X, and the connecting frame 423 synchronously drives all the driving members 421 to move, so that the driving members 421 and the rollers 4222 of the corresponding driven members 422 form synchronous relative motion, and finally convert into synchronous lifting of all the driven members 422, so as to realize smooth and uniform jacking of the support table 430 and the to-be-welded module 700, avoid jacking jamming or inclination of the support table 430 caused by asynchronous driving, and guarantee the accuracy of subsequent pole positioning identification and welding.

[0044] In the embodiment, the jacking mechanism 400 further comprises two limiting assemblies 440, and the two limiting assemblies 440 are respectively arranged at two ends of the support table 430 in the first direction X. Any limiting assembly 440 comprises a stop driver 441 and a stop pin 442. The stop pin 442 is arranged at the power output end of the stop driver 441 and moves along the height direction Z of the jacking mechanism 400 to stop / avoid the support table 430. In the jacking mechanism 400 of the modular magnetic levitation variable-pitch welding device, the two limiting assemblies 440 correspond to the two ends of the support table 430 in the first direction X respectively, and bidirectional limiting can be formed from the two ends of the support table 430, so as to ensure that the support table 430 is always in the preset station within the welding space, avoid that the modular pole deviates from the recognition range of the shooting camera 230 or the copper nozzle 524 deviates from the docking path due to the deviation of the support table 430, and provide position guarantee for subsequent positioning recognition and welding adhesion. The stop driver 441 can output driving force along the height direction Z of the jacking mechanism 400 to control the lifting of the stop pin 442. The stop pin 442 directly limits the structure carrier and moves along the height direction Z of the jacking mechanism 400 to limit the displacement of the support table 430 through physical blocking, forms rigid blocking, and fixes the position of the support table 430 from both ends to avoid the sliding of the support table 430 along the first direction X.

[0045] Referring to Figures 7 to 9 As shown in the figure, the variable-pitch protection mechanism 500 realizes one-to-one correspondence between the copper nozzle 524 and the pole through the cooperation of the fixed frame 510 and the plurality of protection positioning assemblies 520, and simultaneously has the functions of protection and positioning, which is the key to solving the deviation of the pole pitch. The fixed frame 510 is fixed to one side of the transmission line body 300 to provide a stable installation basis for the protection positioning assembly 520. The magnetic rail 511 arranged thereon is the track for the magnetic levitation mover 521 to slide, and through the preset track accuracy, the protection positioning assembly 520 can keep accurate position when adjusting the pitch, so as to avoid the mispositioning of the copper nozzle 524 due to the track deviation. The magnetic levitation mover 521: realizes non-contact sliding through the magnetic levitation technology, avoids the adjustment error caused by mechanical friction, can accurately slide along the magnetic rail 511 under the driving of the control system according to the pole pitch data recognized by the shooting camera 230, quickly adjusts the interval distance between adjacent protection positioning assemblies 520, and finally realizes one-to-one correspondence between the copper nozzle 524 on each assembly and the pole of the welding module 700, thereby solving the problem of uneven pole pitch caused by the deviation of the partition plate compression in the prior art.

[0046] It should be noted that eight copper nozzles 524 are connected to each protection positioning assembly 520 in the embodiment. Because the position deviation of adjacent poles is not large, the error accumulation with the increase of distance will cause a certain interval distance between the poles with large deviation. Therefore, eight copper nozzles 524 are taken as a group for overall adjustment in the embodiment to simplify the structure configuration and reduce the production and processing cost.

[0047] Further, the protection positioning assembly 520 in the embodiment further comprises a linkage plate 522 connected to the magnetic levitation mover 521 and a heat insulation plate 523 connected to the linkage plate 522 and extending in the horizontal direction, and the copper nozzle 524 is arranged at the middle part of the heat insulation plate 523. The linkage plate 522 serves as a power transmission carrier of the magnetic levitation mover 521 and the copper nozzle 524, one end of which is fixedly connected to the magnetic levitation mover 521, and the other end provides a mounting base for the heat insulation plate 523, and the core function is to realize synchronous transmission of power and displacement. When the device control system drives the magnetic levitation mover 521 to slide along the magnetic force track 511 to adjust the distance between the protection positioning assembly 520, the magnetic levitation mover 521 will drive the heat insulation plate 523 and the copper nozzle 524 to move synchronously through the linkage plate 522, ensuring that the displacement of the copper nozzle 524 is completely consistent with the adjustment accuracy of the magnetic levitation mover 521, avoiding the copper nozzle 524 from deviating due to loose connection structure, and further ensuring the precise docking of the copper nozzle 524 and the pole column of the to-be-welded module 700, providing a position reference for subsequent welding. At the same time, the linkage plate 522 can enhance the overall stability of the protection positioning assembly 520 through its rigid structure, preventing the copper nozzle 524 from shaking due to external force during movement or welding. The heat insulation plate 523 mainly bears the heat protection function. When the welding device 220 welds through the copper nozzle 524, the pole column welding area will generate high temperature, and part of the heat will be conducted to the inside of the protection positioning assembly 520 through the copper nozzle 524.

[0048] In the embodiment, the heat insulation plate 523 is made of a glass fiber plate with high temperature resistance and low thermal conductivity, which can effectively block the heat transfer to the linkage plate 522, the magnetic levitation mover 521 and the magnetic force track 511, avoid the demagnetization of the magnetic element of the magnetic levitation mover 521, the deformation of the magnetic force track 511 or the damage of the connection structure due to high temperature, and ensure the long-term stable operation of the protection positioning assembly 520; in addition, the structure design of the heat insulation plate 523 extending in the horizontal direction can provide a stable mounting plane for the copper nozzle 524, ensuring that multiple copper nozzles 524 maintain the same height on the same horizontal plane, and further improving the precision of the docking of the copper nozzle 524 and the pole column. In different embodiments, the heat insulation plate 523 can be configured as a ceramic plate, a high-temperature-resistant composite plate or other material plate according to actual use requirements, which is not limited in the present application.

[0049] The plurality of copper nozzles 524 in the embodiment can abut the surface of the pole precisely, and provide a clear welding point reference for the welder 220 through physical contact, so as to ensure that the energy of the welder 220 can act on the pole precisely; at the same time, the copper nozzles 524 are internally integrated with air channels, which can convey protective gases such as argon and helium during welding, so as to form a closed air layer in the pole welding area, thereby isolating air and preventing the molten pool from being oxidized; most importantly, the copper nozzles 524 are provided with avoiding through holes in the middle, which are used to realize welding conduction, and the copper nozzles 524 can conduct welding current, assist the welder 220 to ignite the arc, provide energy supplement for laser welding, and ensure the fusion quality.

[0050] Further, the protection positioning assembly 520 in the embodiment further includes a floating assembly frame 526 and a plurality of elastic members 525, the floating assembly frame 526 is arranged on the heat insulation plate 523, and the plurality of elastic members 525 are connected between the floating assembly frame 526 and the copper nozzles 524 respectively. The plurality of elastic members 525 can be made of materials such as springs and elastic rubbers that have elastic recovery capability, and mainly bear the dual functions of buffering and shock absorption and pressure balance. On the one hand, during the butt joint process of the copper nozzles 524 and the pole, the elastic members 525 can absorb the impact force during the lifting of the module through compression, so as to avoid damage to the pole or displacement of the copper nozzles 524 caused by rigid contact, and at the same time, the vibration during the butt joint process is slowed down, so as to ensure the stability of the adhesion of the copper nozzles 524 and the pole; on the other hand, the plurality of elastic members 525 are evenly distributed along the floating assembly frame 526, and can apply balanced elastic pressure to the copper nozzles 524, so as to ensure that the pressure of the adhesion surface of the copper nozzles 524 and the pole is consistent everywhere, thereby avoiding that the adhesion is not tight due to too small pressure, and preventing the pole from being depressed or the module structure from being damaged due to too large pressure, so as to provide a stable butt joint basis for energy transmission and protective gas coverage in the subsequent welding process.

[0051] Specifically, the variable-distance protection mechanism 500 in the embodiment further includes a plurality of gas transmission pipelines 530 and a plurality of flow valves 531, the plurality of gas transmission pipelines 530 are communicated with the plurality of copper nozzles 524 respectively, and the plurality of flow valves 531 are arranged on the plurality of gas transmission pipelines 530 one by one, so as to realize the supply of protective gas or the recovery of welding impurities. The module magnetic suspension variable-distance welding equipment in the embodiment further includes a mounting plate 100 and at least two pedestals 600, the identification welding mechanism 200 is supported on the mounting plate 100, at least two machining stations are arranged on the mounting plate 100, the transmission line body 300, the lifting mechanism 400 and the variable-distance protection mechanism 500 are arranged in any machining station, and the pedestals 600 are arranged one by one corresponding to the machining stations, so as to improve the welding machining efficiency, and other numbers of machining stations can be arranged according to actual use requirements in different embodiments, which is not limited in the present application.

[0052] The modular magnetic suspension variable-distance welding device in the embodiment further comprises a control mechanism, and the welder 220, the shooting camera 230, the jacking mechanism 400 and the variable-distance protection mechanism 500 are respectively connected to the control mechanism. In actual production and processing, an operator can perform real-time regulation and control on the above-mentioned structures through the control mechanism, thereby improving the use flexibility of the device, and the control mechanism can also be used for parameter presetting, thereby improving the automation degree of the device.

[0053] Embodiment two:

[0054] The embodiment provides a modular welding method, which adopts the modular magnetic suspension variable-distance welding device in the embodiment one for modular welding processing, and the method comprises the following steps: Step S1: transmitting a to-be-welded module into a welding space.

[0055] Step S2: performing first jacking on the to-be-welded module 700, so that the to-be-welded module 700 is separated from the transmission line body 300. Further, in the embodiment, the to-be-welded module 700 is subjected to second jacking through the jacking mechanism 400. Specifically, in the embodiment, the driving part 421 is moved along the first direction X for the first time, and then the driven part 422 is moved along the first jacking inclined surface 4211 to the first buffer surface 4212.

[0056] Step S3: performing shooting identification on a mark point on the to-be-welded module 700, so as to determine the pole column distance on the module.

[0057] Step S4: adjusting the position of the protection positioning assembly 520 according to the pole column distance, so that the plurality of copper nozzles 524 on the protection positioning assembly 520 are one-to-one corresponding to the pole columns on the to-be-welded module 700 in the vertical direction.

[0058] Step S5: performing second jacking on the to-be-welded module 700 until the pole columns on the to-be-welded module 700 are respectively in abutment with the corresponding copper nozzles 524. Specifically, in the embodiment, the driving part 421 is moved along the first direction X for the second time, and then the driven part 422 is moved along the second jacking inclined surface 4213 to the second buffer surface 4214, so that the to-be-welded module 700 is subjected to second jacking through the jacking mechanism 400 until the pole columns on the to-be-welded module 700 are respectively in abutment with the bottom surfaces of the corresponding copper nozzles 524. In this process, the elastic part 525 is gradually compressed on the top of the copper nozzle 524, so as to form a buffer for the compression of the copper nozzle 524.

[0059] Step S6: sequentially welding a plurality of to-be-welded pole columns, and supplying protection gas to the welding sites through the copper nozzles 524, so as to complete the modular welding processing.

[0060] To sum up, the module magnetic suspension variable distance welding equipment and the module welding method, the module to be welded 700 is transmitted by the transmission line body 300, the jacking mechanism 400 can jack up the module to be welded 700 twice, wherein the first jacking is used to cooperate with the shooting camera 230 to identify the module pole position, then the position of the protection positioning assembly 520 is adjusted by the variable distance protection mechanism 500, so that the one-to-one corresponding structure of the copper nozzle 524 and the battery pole is realized, then the close fit between the module to be welded 700 and the copper nozzle 524 is realized by the second jacking of the jacking mechanism 400, so as to provide the welding reference for the welder 220 and supply the protection gas, finally the welding is realized by the welder 220, and the high-precision processing welding process can be realized. Compared with the existing conventional welding technology, the application has the advantages of high automation degree, strong controllability, wide application range, high processing precision, high welding efficiency and stable welding quality, and provides a new automatic equipment for module processing.

[0061] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. All the embodiments do not need to be exhausted here. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A modular magnetic levitation variable pitch welding apparatus, characterized by: The utility model relates to a welding mechanism, which comprises an adjusting frame, a welding device and a shooting camera, the adjusting frame has a welding space inside, the welding device and the shooting camera are both slidingly connected to the adjusting frame and move in the welding space. A transmission line body is arranged in the welding space along a first direction, and a module to be welded is moved into the welding space through the transmission line body. A lifting mechanism is arranged on an extension path of the transmission line body, which comprises a secondary lifting assembly and a supporting table, the secondary lifting assembly comprises a driving member and a driven member, the driving member and the driven member can move relative to each other along the first direction, the driving member is arranged below the transmission line body, and comprises a primary lifting slope and a secondary lifting slope which extend obliquely along a height direction of the driving member in the first direction, the top end of the primary lifting slope is communicated with the bottom end of the secondary lifting slope, the driven member comprises a driven frame and a roller, the roller is rotationally connected to the bottom of the driven frame and rolls on the primary lifting slope or the secondary lifting slope of the driving member to drive the driven frame to move up and down, and the supporting table is connected to the top surface of the driven frame to lift the module to be welded. A variable distance protection mechanism is arranged on one side of the transmission line body, which comprises a fixed frame and a plurality of protection positioning assemblies, the fixed frame is provided with a magnetic track, any protection positioning assembly comprises a magnetic levitation rotor and a plurality of copper nozzles which are connected to each other, the magnetic levitation rotor is slidingly connected to the magnetic track to adjust the interval distance between adjacent protection positioning assemblies, the copper nozzles can abut against the module to be welded, and the welding device contacts the electrode column to be welded through the copper nozzles. The lifting mechanism further comprises an assembly table which is provided with at least one guide module extending along the first direction, and the bottom of the driving member is provided with a sliding block which is slidingly connected to the guide module.

2. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The supporting table is provided with a positioning pin, side stoppers and guide columns, the positioning pin protrudes from the upper surface of the supporting table and can be inserted into a positioning hole in the bottom of the module to be welded, a plurality of side stoppers are arranged on the edges of the supporting table in a second direction, and the guide columns extend along the height direction of the lifting mechanism, one end of each guide column is connected to the supporting table, and the other end is slidingly inserted into the assembly table.

3. The modular magnetic levitation variable-stroke welding apparatus of claim 2, wherein: The driving member further comprises a primary buffer surface and a secondary buffer surface, both the primary buffer surface and the secondary buffer surface extend along the first direction, the two ends of the primary buffer surface are respectively communicated with the top end of the primary lifting slope and the bottom end of the secondary lifting slope, the secondary buffer surface is communicated with the top end of the secondary lifting slope, and the driven member can be supported and buffered on the primary buffer surface or the secondary buffer surface.

4. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: ​ 5. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The secondary jacking assembly comprises at least two driving members, at least two driven members, a connecting frame and a driver, the at least two driving members and the at least two driven members are one-to-one correspondingly arranged, the driver is arranged at one end of the connecting frame, and the driving members are all connected to the connecting frame to move synchronously along the first direction through the driver.

6. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The jacking mechanism further comprises two limiting assemblies, the two limiting assemblies are respectively arranged at two ends of the support table in the first direction, any limiting assembly comprises a stopper driver and a stopper pin, the stopper pin is arranged at the power output end of the stopper driver and moves along the height direction of the jacking mechanism to stop / avoid the support table.

7. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The protective positioning assembly further comprises a linkage plate and a heat insulation plate, the linkage plate is connected to the magnetic suspension rotor, and the heat insulation plate is connected to the linkage plate and extends in the horizontal direction, and the copper nozzle is arranged at the middle part of the heat insulation plate.

8. The modular magnetic levitation variable-stroke welding apparatus of claim 7, wherein: The protective positioning assembly further comprises a floating assembly frame and a plurality of elastic members, the floating assembly frame is arranged on the heat insulation plate, and the plurality of elastic members are respectively connected between the floating assembly frame and the copper nozzle.

9. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The variable-distance protection mechanism further comprises a plurality of gas transmission pipelines and a plurality of flow valves, the plurality of gas transmission pipelines are respectively communicated with the plurality of copper nozzles, and the plurality of flow valves are one-to-one correspondingly arranged on the plurality of gas transmission pipelines.

10. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The adjusting frame comprises a first horizontal module, a second horizontal module, a lifting carriage and a mounting base, the second horizontal module extends in a second direction, the first horizontal module is slidingly connected to the second horizontal module and extends in the first direction, the lifting carriage is slidingly connected to the first horizontal module and is provided with a lifting module thereon, and the mounting base is slidingly connected to the lifting module, and the welding device and the camera are both arranged on the mounting base.

11. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The modular magnetic suspension variable-distance welding device further comprises a mounting plate and at least two pedestals, the identification welding mechanism is supported on the mounting plate, the mounting plate is provided with at least two machining stations, any machining station is provided with a transmission line body, the jacking mechanism and the variable-distance protection mechanism, and the pedestals are one-to-one correspondingly arranged with the machining stations.

12. The modular magnetic levitation variable-stroke welding apparatus of claim 1, wherein: The modular magnetic suspension variable-distance welding device further comprises a control mechanism, and the welding device, the camera, the jacking mechanism and the variable-distance protection mechanism are respectively connected to the control mechanism.

13. A method of modular welding, the method comprising: The modular magnetic suspension variable-distance welding device is used for modular welding processing, which comprises the following steps: S1, transmitting a to-be-welded module into a welding space; S2, performing first jacking on the to-be-welded module to make it separate from the transmission line body; S3, photographing and identifying a mark point on the to-be-welded module to determine the pole distance of the module; S4, adjusting the position of the protective positioning assembly according to the pole distance to make the plurality of copper nozzles on the protective positioning assembly one-to-one correspond with the poles on the to-be-welded module in the vertical direction. Step S5, the second jacking is carried out to the module to be welded until the pole on the module to be welded respectively abuts against the corresponding copper nozzle; Step S6, the multiple poles to be welded are welded in sequence, and the copper nozzle is used to supply the protection gas to the welding site to complete the module welding process.

14. The method of modular welding of claim 13, wherein: In step S2, the driving part is moved along the first direction for the first time, and then the driven part is moved along the first jacking slope to the first buffer surface; in step S5, the driving part is moved along the first direction for the second time, and then the driven part is moved along the second jacking slope to the second buffer surface.

15. The method of modular welding of claim 13, wherein: Step S5 is specifically: the second jacking is carried out to the module to be welded by the jacking mechanism until the pole on the module to be welded abuts against the bottom surface of the corresponding copper nozzle, and in this process, the elastic part is gradually compressed at the top of the copper nozzle to form a buffer for the pressing process of the copper nozzle.

Images