Automatic high-precision welding device and welding process for power storage battery shell box

Abstract

The invention relates to the technical field of welding, and discloses a power storage battery shell box automatic high-precision welding device which comprises a rack, a conveying belt, a welding structure, a transferring mechanism and an inner supporting mechanism are mounted on the rack, and the inner supporting mechanism comprises a mounting base and a third linear module driving the mounting base to move in the horizontal direction. An inner supporting component is installed on the installation base and comprises a rotating base with the vertical axis and rotationally installed on the installation base and a first motor driving the rotating base to rotate, a frame table is arranged on the upper end face of the rotating base, an inner supporting assembly is arranged in the frame table, the upper supporting end of the inner supporting assembly extends out of the frame table, and an avoiding opening is formed in the upper end of the frame table. The inner supporting assembly comprises a lifting base and a fourth linear module driving the lifting base to do lifting motion, and four sets of inner supporting parts are arranged on the lifting base and support the four inner walls of the main box shell correspondingly.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, in particular to the field of welding of battery boxes, and in particular to an automated high-precision welding device and a welding process for a power battery housing. Background Art

[0002] The battery comprises a battery case and a battery cell arranged in the battery case. The battery case is generally made by welding. Furthermore, the battery case generally comprises a main case with openings at both ends. A case cover and a case bottom are respectively welded at the two openings of the main case. Generally, the case bottom is welded first, then the battery cell is loaded therein, and finally the case cover is welded. When welding the case bottom, since the main case of the battery case is generally thin and has no supporting material inside, it is easy to deform when the main case is clamped. A certain pressure is required during welding, and this pressure will also easily cause the main case to deform. In addition, a large amount of heat will inevitably be generated during the welding process. After welding, it is necessary to wait for a preset heat dissipation time before moving the battery case. Therefore, in order to improve the welding quality of the battery case, reduce the heat dissipation time, and improve the welding efficiency, the present invention proposes an automated high-precision welding device and a welding process for a power battery outer shell. Summary of the invention

[0003] In order to solve the problems mentioned in the above background, the present invention provides an automated high-precision welding device and a welding process for a power battery casing.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0005] The automatic high-precision welding device for the power battery housing comprises a frame, on which a conveyor belt, a welding structure, a transfer mechanism and an inner support mechanism are installed. The conveyor belt is used to convey the bottom of the box, the inner support mechanism is used to clamp and support the main box shell from the inside, the transfer mechanism is used to position the bottom of the box at the upper opening of the main box shell, and the welding structure is used to realize the welding process between the bottom of the box and the main box shell;

[0006] The internal support mechanism includes a mounting seat and a linear module three for driving the mounting seat to move in a horizontal direction, an internal support component is installed on the mounting seat, the internal support component includes a rotating seat with a vertical axis and rotatably mounted on the mounting seat, and a motor one for driving the rotating seat to rotate, a frame platform is provided on the upper end surface of the rotating seat, an internal support assembly is provided in the frame platform, the upper supporting end of the internal support assembly extends out of the frame platform, and an avoidance opening is provided on the upper end of the frame platform, the internal support assembly includes a lifting seat and a linear module four for driving the lifting seat to move up and down, an internal support component is provided on the lifting seat, four groups of internal support components are provided, and the four inner walls of the main box shell are supported respectively.

[0007] Furthermore, the inner support component includes a slide seat installed on the lifting seat in a horizontal direction and a linear module five that drives the slide seat to move. The upper end of the slide seat extends out of the frame and is provided with a vertically arranged middle support plate. The upper and lower ends of the middle support plate are provided with convex plates extending toward the inner area. A vertically arranged lead screw and guide rail are installed between the two convex plates. The lead screw is power-connected to a motor two arranged on the slide seat. The lead screw is divided into two threaded sections with opposite thread directions along its own axial direction. A driving seat is provided on each threaded section. The driving seat and the guide rail are slidably connected. A vertically arranged side support plate is provided on each side of the middle support plate along the movement direction of the slide seat. The side support plates are connected to the drive seat by folding parts. The side support plates are flush with the upper ends of the middle support plates.

[0008] Furthermore, the folding part includes two connecting rods which are cross-arranged and hingedly connected. The hinge between the two connecting rods is located at the middle position of the connecting rods. One end of one connecting rod is hinged to the middle support plate, and the other end is hinged to the side support plate to form a vertical sliding connection. One end of the other connecting rod is hinged to the drive seat, and the other end is hinged to the side support plate.

[0009] Furthermore, among the four groups of inner support components, the movement direction of the slide of one group of inner support components is parallel to the conveying direction of the conveyor belt, and the movement directions of the slides in two adjacent groups of inner support components are perpendicular to each other.

[0010] Furthermore, the transfer mechanism includes a correction component and a transfer component.

[0011] Furthermore, the correcting member is located above the conveyor belt, and the correcting member includes a transverse plate slidably installed on the frame along the conveying direction of the conveyor belt, the extension direction of the transverse plate is parallel to the width direction of the conveyor belt, two transverse plates are arranged along their own sliding direction, the distance between the two transverse plates is adjustable, the facing sides of the two transverse plates are composed of a lower inclined surface 1 and an upper plane 1, and the distance between the two lower inclined surfaces 1 decreases from bottom to top, and a longitudinal plate is detachably installed between the two transverse plates, the extension direction of the longitudinal plate is parallel to the conveying direction of the conveyor belt, two longitudinal plates are arranged along the width direction of the conveyor belt, the facing sides of the two longitudinal plates are composed of a lower inclined surface 2 and an upper plane 2, and the distance between the two lower inclined surfaces 2 decreases from bottom to top.

[0012] Furthermore, a threaded shaft parallel to the sliding direction of the horizontal plate is installed on the frame, and the threaded shaft is divided into two spiral sections with opposite thread directions along the axis direction, and the two spiral sections are respectively threadedly connected to the two horizontal plates;

[0013] A guide hole 1 is provided on the longitudinal plate, and a guide hole 2 is provided on the transverse plate, and a guide hole 2 is provided, and a guide hole 2 is parallel to the width direction of the conveyor belt. Bolts and nuts are installed between the guide hole 1 and the guide hole 2, and the bolts are connected with the nuts after passing through the guide hole 1 and the guide hole 2.

[0014] Further, the transfer component includes a movable seat 1 and a linear module 1 that drives the movable seat 1 to move along the width direction of the conveyor belt, a movable seat 2 and a linear module 2 that drives the movable seat 2 to move along the vertical direction are installed on the movable seat 1, a connecting column extends from the bottom of the movable seat 2, a cross seat is arranged at the bottom of the connecting column, horizontally arranged cross guide rods extend from both sides of the cross seat, a longitudinal seat is slidably installed on each cross guide rod, a limiting ring 1 is arranged at the free end of the cross guide rod, and a cross spring located between the limiting ring 1 and the longitudinal seat is sleeved on the outside of the cross guide rod;

[0015] There is a base below the longitudinal seat, on which two horizontally arranged longitudinal guide rods are installed. The longitudinal guide rods and the transverse guide rods are perpendicular to each other, and the two longitudinal guide rods are slidably connected to the two longitudinal seats respectively. Both ends of the longitudinal guide rods are provided with a second limiting ring located outside the longitudinal seat, and the outer sleeve of the longitudinal guide rod is provided with a longitudinal spring located between the second limiting ring and the longitudinal seat. A turntable is rotatably installed at the middle position of the base and a damping is provided at the rotating installation. A plurality of adsorption heads are distributed in an array on the lower end surface of the turntable, and the plurality of adsorption heads are connected by a negative pressure pipe, and a negative pressure pump is connected to the end of the negative pressure pipe.

[0016] Furthermore, a friction seat is arranged on the longitudinal seat, a vertical spring is arranged between the friction seat and the longitudinal seat, the elastic force of the vertical spring drives the friction seat to move upward, a cylinder for driving the friction seat to move downward is arranged on the longitudinal seat, and two arc surfaces are arranged on the longitudinal seat. Initially, the two arc surfaces are respectively located directly above the transverse guide rod and the longitudinal guide rod.

[0017] Welding process of automatic high-precision welding device for power battery shell:

[0018] Step 1: After the bottom of the box is pulled by the conveyor belt to be directly below the correction component, the linear module 1 drives the movable seat 1 to retreat so that the adsorption head is directly above the correction component, and the linear module 2 drives the movable seat 2 to move downward, and the bottom of the box is adsorbed by the adsorption head;

[0019] Step 2: The linear module 2 drives the movable seat 2 to move upward. During the upward movement, if there is no position deviation of the box bottom, the box bottom directly passes through the area composed of the two upper planes 1 and the two upper planes 2. If there is a position deviation of the box bottom, the position of the box bottom will be corrected with the cooperation of the two lower inclined planes 1 and the two lower inclined planes 2. After that, the box bottom will smoothly pass through the area composed of the two upper planes 1 and the two upper planes 2.

[0020] When the bottom of the box passes through the area formed by the two upper planes 1 and the two upper planes 2, the linear module 2 pauses. During the pause, the cylinder is started to move the friction seat downward to press against the horizontal guide rod and the longitudinal guide rod, so that the position of the base is restricted, and the bottom of the box and the transfer member are in a relatively static state.

[0021] Step 3: While carrying out steps 1 and 2, support the main box shell from the inside through the internal support mechanism:

[0022] The main box shell is placed on the frame platform and the inner support assembly is located inside the main box shell. Then, the four groups of inner support components start to operate: the lead screw is driven to rotate by the second motor to drive the two drive seats to move away from each other, so that the side support plates can be driven away from the middle support plate. When the distance between the side support plate and the middle support plate in the inner support component is equal to one-fourth of the length or width of the main box shell, the second motor stops operating. At the same time, the fourth linear module drives the lifting seat to move so that the upper ends of the side support plate and the middle support plate and the upper end of the main box shell are flush.

[0023] Then, the linear module 5 runs, driving the slide to move, and the slide moves with the side support plate and the middle support plate until the side support plate and the middle support plate are both in contact with the corresponding inner wall of the main box shell. At this time, the main box shell is supported from the inside.

[0024] Step 4: Through the cooperation of linear module 1 and linear module 2, the box bottom is located directly above the main box shell and moves down to the upper opening of the main box shell. At this point, the alignment between the main box shell and the box bottom is completed;

[0025] Step 5: The box bottom and the main box shell are welded by welding structure. During the welding process, after welding for a certain distance, the suction head can cancel the suction on the box bottom. Then, with the rotation of the rotating seat, the welding of the box bottom and the four sides of the main box shell is completed.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This solution can provide internal support for the main shell of the battery shell to prevent it from deforming during welding:

[0028] On the one hand, the present solution can adapt to battery case shells of different sizes and specifications to realize internal support for the battery case shells, and prevent deformation caused by the main case shell being too thin and affecting the final welding result. On the other hand: 1. The middle support plate and the side support plates are both made of heat-conducting materials, such as copper. Therefore, it is not only possible to support the bottom of the case through the upper end to prevent the welding pressure from causing dislocation at the welding position and affecting the welding result, but also to increase the contact area with the air and improve the heat dissipation effect, so that the heat generated by welding can be dissipated faster, thereby achieving the purpose of improving welding efficiency; 2. When supporting, the distance between the side support plate and the middle support plate is equal to one-fourth of the length or width of the main case shell, that is, the middle support plate and the side support plate in the internal support component divide the length or width of the main case shell into four equal parts. In this way, the purpose of equidistant heat dissipation and equidistant support is achieved, so that the middle support plate and the side support plate have a better support effect on the bottom of the case, and the auxiliary heat dissipation effect is better.

[0029] 2. In this solution, during the process of the transfer component pulling the box bottom to move toward the upper opening of the main box shell, the position of the box bottom is corrected by the correction component, so that the box bottom can be accurately located at the upper opening of the main box shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0031] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0032] Figure 3 It is a structural schematic diagram of the conveyor belt, welding structure and transfer mechanism;

[0033] Figure 4 To correct the structural diagram of the component;

[0034] Figure 5 is a schematic diagram of the structure of the transfer component;

[0035] Figure 6 A partial schematic diagram of the transfer component Figure 1 ;

[0036] Figure 7 A partial schematic diagram of the transfer component Figure 2 ;

[0037] Figure 8 is a structural schematic diagram of the inner support mechanism;

[0038] Fig. 9 is a schematic diagram of the structure of the inner support member;

[0039] Fig.10 is a schematic diagram of the structure of the inner support assembly;

[0040] Fig.11 It is a schematic diagram of the structure of four groups of internal support components;

[0041] Fig.12 It is a partial schematic diagram of the inner support component.

[0042] The reference numerals in the accompanying drawings are:

[0043] 100, conveyor belt; 200, welding structure; 300, transfer mechanism; 301, correction member; 3011, horizontal plate; 3012, vertical plate; 302, transfer member; 303, linear module 1; 304, movable seat 1; 305, linear module 2; 306, movable seat 2; 307, connecting column; 308, horizontal seat; 309, horizontal guide rod; 310, horizontal spring; 311, vertical seat; 312, vertical guide rod; 313, vertical spring; 314, base; 315, turntable; 316, adsorption head; 3 17. Cylinder; 318. Friction seat; 319. Vertical spring; 400. Internal support mechanism; 401. Linear module three; 402. Mounting seat; 403. Rotating seat; 404. Motor one; 405. Frame; 406. Internal support assembly; 407. Linear module four; 408. Lifting seat; 409. Internal support component; 4091. Linear module five; 4092. Sliding seat; 4093. Middle support plate; 4094. Motor two; 4095. Screw; 4096. Side support plate; 4097. Connecting rod. DETAILED DESCRIPTION

[0044] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0045] This solution is aimed at the welding between the main box shell and the box bottom of the battery box. In the accompanying drawings, a refers to the box bottom and b refers to the main box shell.

[0046] Reference Figure 1-Figure 12 The automatic high-precision welding device for the power battery shell box includes a frame, on which a conveyor belt 100, a welding structure 200, a transfer mechanism 300 and an internal support mechanism 400 are installed, wherein the conveyor belt 100 is used to convey the box bottom, the internal support mechanism 400 is used to clamp and support the main box shell from the inside, the transfer mechanism 300 is used to pull the box bottom to move and position it at the upper opening of the main box shell, the welding structure 200 is used to realize the automatic welding between the box bottom and the main box shell, the conveyor belt 100 and the welding structure 200 are both achievable by existing technologies, are not the core of this solution, and are not elaborated on. During the welding process, a large amount of heat will be generated at the welding position between the box bottom and the main box shell.

[0047] Internal support mechanism 400:

[0048] Reference Figure 8-Figure 12 The internal support mechanism 400 includes a mounting seat 402 and a linear module 401 that drives the mounting seat 402 to move in a horizontal direction. An internal support member is installed on the mounting seat 402. Preferably, two groups of internal support members are provided. The internal support members are used to clamp and support the main box shell from the inside. Two groups are provided and can be used alternately to improve welding efficiency.

[0049] The inner support member includes a rotating seat 403 with a vertical axis and rotatably mounted on a mounting seat 402, and a motor 404 for driving the rotating seat 403 to rotate. A frame platform 405 is provided on the upper end surface of the rotating seat 403, an inner support assembly 406 is provided in the frame platform 405, an upper support end of the inner support assembly 406 extends out of the frame platform 405, and an avoidance opening is provided at the upper end of the frame platform 405.

[0050] The inner support assembly 406 includes a lifting seat 408 and a linear module 407 that drives the lifting seat 408 to move up and down. The lifting seat 408 is provided with an inner support component 409. The inner support component 409 is provided with four groups and supports the four inner walls of the main box shell respectively. For the convenience of subsequent description, the area between the four groups of inner support components 409 is named as the inner area.

[0051] Reference Fig.11 and Fig.12 The inner support component 409 includes a slide 4092 mounted on the lifting seat 408 for sliding along the horizontal direction and a linear module 4091 for driving the slide 4092 to move. It should be noted that among the four groups of inner support components 409, the movement direction of the slide 4092 of one group of inner support components 409 is parallel to the conveying direction of the conveyor belt 100, and the movement directions of the slides 4092 in two adjacent groups of inner support components 409 are perpendicular to each other.

[0052] The upper end of the slide 4092 extends out of the frame 405 and is provided with a vertically arranged middle support plate 4093. The upper and lower ends of the middle support plate 4093 are provided with convex plates extending toward the inner area. A vertically arranged screw rod 4095 and a guide rail are installed between the two convex plates. The screw rod 4095 is driven to rotate by the second motor 4094 set on the slide 4092. The screw rod 4095 is divided into two thread segments with opposite thread directions along its own axial direction. A driving seat is provided on each thread segment. The driving seat and the guide rail are slidably connected. Therefore, when the second motor 4094 drives the screw rod 4095 to rotate, the two driving seats move closer to or away from each other.

[0053] A vertically arranged side support plate 4096 is respectively provided on both sides of the middle support plate 4093 along the movement direction of the slide seat 4092. The side support plate 4096 is connected to the driving seat through a folding piece, and the side support plate 4096 is flush with the upper end of the middle support plate 4093.

[0054] Furthermore, the folding part includes two connecting rods 4097 which are cross-arranged and hingedly connected. The hinge between the two connecting rods 4097 is located at the middle position of the connecting rod 4097. One end of one connecting rod 4097 is hinged to the middle support plate 4093, and the other end is vertically slidably connected to the side support plate 4096. One end of the other connecting rod 4097 is hinged to the driving seat, and the other end is hinged to the side support plate 4096. When the two driving seats move towards each other, the side support plate 4096 can be driven to approach the middle support plate 4093. When the two driving seats move away from each other, the side support plate 4096 can be driven to move away from the middle support plate 4093, and the distance between the middle support plate 4093 and the two side support plates 4096 is equal.

[0055] The supporting process of the inner supporting mechanism 400 on the main box shell is specifically manifested as follows:

[0056] Through existing technical means, such as robotic arm technology or manual, such as Fig. 9 As shown, the main box shell is placed on the frame platform 405 and the inner support assembly 406 is located inside the main box shell;

[0057] Then, the four groups of inner support components 409 start to operate: the second motor 4094 drives the screw rod 4095 to rotate, driving the two drive seats to move away from each other, thereby driving the side support plate 4096 away from the middle support plate 4093. When the distance between the side support plate 4096 and the middle support plate 4093 in the inner support component 409 is equal to one quarter of the length or width of the main box shell, the second motor 4094 stops operating;

[0058] At the same time, the linear module 407 operates to drive the lifting seat 408 to move, so that the upper end of the side support plate 4096 is flush with the upper end of the middle support plate 4093 and the upper end of the main box shell;

[0059] Then, the linear module 4091 runs, driving the slide 4092 to move, and the slide 4092 moves with the side support plate 4096 and the middle support plate 4093 until the side support plate 4096 and the middle support plate 4093 are both in contact with the corresponding inner walls of the main box shell. At this time, the support of the main box shell from the inside is completed.

[0060] From the above process, we can know that:

[0061] On the one hand, the present solution can adapt to battery box shells of different sizes and specifications to realize internal support for the battery box shell, and prevent deformation caused by the main box shell being too thin and affecting the final welding result. On the other hand: 1. The middle support plate 4093 and the side support plate 4096 are both made of heat-conducting materials, such as copper. Therefore, not only can the bottom of the box be supported by the upper end to prevent the welding pressure from causing dislocation at the welding position and affecting the welding result, but also the contact area with the air can be increased to improve the heat dissipation effect, so that the heat generated by welding can be dissipated faster, thereby achieving the purpose of improving welding efficiency; 2. When supporting, the distance between the side support plate 4096 and the middle support plate 4093 is equal to one-fourth of the length or width of the main box shell, that is, the middle support plate 4093 and the side support plate 4096 in the inner support component 409 divide the length or width of the main box shell into four equal parts, so that the purpose of equidistant heat dissipation and equidistant support is achieved, so that the middle support plate 4093 and the side support plate 4096 have a better support effect on the bottom of the box and a better auxiliary heat dissipation effect.

[0062] Transfer mechanism 300:

[0063] Reference Figure 3 The transfer mechanism 300 includes a correction component 301 and a transfer component 302. The transfer component 302 is used to pull the box bottom on the conveyor belt 100 to move toward the upper opening of the main box shell supported by the internal support mechanism 400. During the movement, the position of the box bottom is corrected by the correction component 301. Its significance lies in that when the conveyor belt 100 transports the box bottom, there will inevitably be some position deviation in the box bottom. Therefore, position correction is required to avoid deviation in the subsequent alignment between the box bottom and the upper opening of the main box shell.

[0064] Reference Figure 4 The correction member 301 is located above the conveyor belt 100. The correction member 301 includes a transverse plate 3011 slidably installed on the frame along the conveying direction of the conveyor belt 100. The extension direction of the transverse plate 3011 is parallel to the width direction of the conveyor belt 100. Two transverse plates 3011 are arranged along their own sliding direction. The facing sides of the two transverse plates 3011 are composed of a lower inclined surface 1 and an upper plane 1, wherein the distance between the two lower inclined surfaces 1 decreases from bottom to top. Furthermore, a threaded shaft parallel to the sliding direction of the transverse plate 3011 is installed on the frame. The threaded shaft is divided into two spiral sections with opposite thread directions along the axis direction. The two spiral sections are respectively threadedly connected to the two transverse plates 3011. By rotating the threaded shaft, the distance between the two transverse plates 3011 can be changed.

[0065] A longitudinal plate 3012 is detachably mounted between the two transverse plates 3011, the extension direction of the longitudinal plate 3012 is parallel to the conveying direction of the conveyor belt 100, two longitudinal plates 3012 are arranged along the width direction of the conveyor belt 100, and the sides of the two longitudinal plates 3012 facing each other are composed of a lower inclined surface 2 and an upper plane 2, wherein the distance between the two lower inclined surfaces 2 decreases from bottom to top, further, a guide hole 1 is arranged on the longitudinal plate 3012, and a guide hole 1 is arranged on the transverse plate 301 ... There is a guide hole 2 in the width direction of the conveyor belt 100, and bolts and nuts are installed between the guide hole 1 and the guide hole 2. Specifically, remove the nuts, and after the distance between the two horizontal plates 3011 is adjusted, adjust the distance between the two longitudinal plates 3012. After the adjustment, screw the nuts back onto the bolts and tighten them. The significance of this is that the distance between the two upper planes 1 and the two upper planes 2 respectively corresponds to the length and width of the bottom of the box. Therefore, the correction component 301 can be adjusted according to the size of the bottom of the box so that it can adapt to the bottoms of boxes of different sizes.

[0066] Reference Figure 5-Figure 7 The transfer member 302 includes a movable seat 1 304 and a linear module 1 303 for driving the movable seat 1 304 to move along the width direction of the conveyor belt 100, and a movable seat 2 306 and a linear module 2 305 for driving the movable seat 2 306 to move along the vertical direction are installed on the movable seat 1 304.

[0067] A connecting column 307 extends vertically from the bottom of the movable seat 2 306, and a cross seat 308 is arranged at the bottom of the connecting column 307. Horizontally arranged cross guide rods 309 extend from both sides of the cross seat 308, and a vertical seat 311 is slidably installed on each cross guide rod 309. A limiting ring 1 is provided at the free end of the cross guide rod 309, and a cross spring 310 located between the limiting ring 1 and the vertical seat 311 is sleeved on the outside of the cross guide rod 309.

[0068] There is a base 314 below the longitudinal seat 311, and two horizontally arranged longitudinal guide rods 312 are installed on the base 314. The longitudinal guide rod 312 and the transverse guide rod 309 are perpendicular to each other. The two longitudinal guide rods 312 are slidably connected to the two longitudinal seats 311 respectively. Both ends of the longitudinal guide rod 312 are provided with a limit ring 2 located outside the longitudinal seat 311. The outer sleeve of the longitudinal guide rod 312 is provided with a longitudinal spring 313 located between the limit ring 2 and the longitudinal seat 311. There are two longitudinal springs 313 on each longitudinal guide rod 312. In this way, it is equivalent to that the base 314 can move arbitrarily in the plane coordinate system formed by the transverse guide rod 309 and the longitudinal guide rod 312, and compress the corresponding transverse spring 310 and longitudinal spring 313.

[0069] Furthermore, a friction seat 318 is provided on the longitudinal seat 311, and a vertical spring 319 is provided between the friction seat 318 and the longitudinal seat 311. The elastic force of the vertical spring 319 is used to drive the friction seat 318 to move upward. The longitudinal seat 311 is also provided with a cylinder 317 for driving the friction seat 318 to move downward. Two arc surfaces are provided on the longitudinal seat 311. Initially, the two arc surfaces are respectively located above the transverse guide rod 309 and the longitudinal guide rod 312. The significance of this is that, initially, the base 314 can move arbitrarily within the plane coordinate system formed by the transverse guide rod 309 and the longitudinal guide rod 312, but when the cylinder 317 drives the friction seat 318 to move downward, the two arc surfaces are respectively located to contact the transverse guide rod 309 and the longitudinal guide rod 312, so that the base 314 can maintain its current position.

[0070] A turntable 315 is rotatably mounted at the middle position of the base 314, and the rotating shaft formed at the rotating mounting location is arranged vertically, and damping is provided at the rotating mounting location. For example, the outside of the rotating shaft and the wall of the rotating shaft hole arranged on the base 314 and used to install the rotating shaft are provided with a damping layer made of rubber or silicone. The damping layer increases the rotational friction force, so that the turntable 315 can rotate when subjected to external force, but the rotation stops after the external force is removed.

[0071] A plurality of adsorption heads 316 are distributed in an array on the lower end surface of the turntable 315 . The plurality of adsorption heads 316 are connected by negative pressure pipes. The negative pressure pipes are connected to negative pressure pumps. The adsorption heads 316 can achieve adsorption and fixation on the bottom of the box by negative pressure.

[0072] The working process of the transfer mechanism 300 is specifically as follows:

[0073] The bottom of the box is pulled by the conveyor belt 100 to be located directly below the correction member 301. Due to the accuracy of the conveyor belt 100 itself, there is a certain position deviation of the bottom of the box.

[0074] Then, since the transfer member 302 is located in front of the correction member 301, the linear module 1 303 can drive the movable seat 1 304 to retreat, so that the adsorption head 316 is located directly above the correction member 301. Then, the linear module 2 305 drives the movable seat 2 306 to move downward, and the adsorption head 316 adsorbs the bottom of the box;

[0075] Then, the second linear module 305 drives the second movable seat 306 to move upward. During the upward movement, if there is no position deviation of the box bottom, the box bottom directly passes through the area formed by the two upper planes 1 and the two upper planes 2. If there is a position deviation of the box bottom, the position of the box bottom will be corrected with the cooperation of the two lower inclined planes 1 and the two lower inclined planes 2. After that, the box bottom will smoothly pass through the area formed by the two upper planes 1 and the two upper planes 2.

[0076] When the bottom of the box passes through the area formed by the two upper planes 1 and the two upper planes 2, the linear module 2 305 pauses. During the pause, the cylinder 317 is activated to move the friction seat 318 downward to abut against the horizontal guide rod 309 and the longitudinal guide rod 312, so that the position of the base 314 is restricted, and the bottom of the box and the transfer member 302 are relatively static.

[0077] Finally, through the cooperation of the linear module 1 303 and the linear module 2 305, the box bottom is located just above the main box shell and moves down to the upper opening of the main box shell. At this point, the alignment between the main box shell and the box bottom is completed.

[0078] After alignment, the box bottom and the main box shell are welded through the welding structure 200. During the welding process, after welding for a certain distance, the adsorption head 316 can cancel the adsorption of the box bottom. Then, in conjunction with the rotation of the rotating seat 403, the welding of the four sides of the box bottom and the main box shell is completed.

[0079] In this solution, the linear module can be realized by existing screw linear technology and will not be described in detail.

[0080] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automated high-precision welding device for a power battery housing, including a frame, characterized in that: A conveyor belt (100), a welding structure (200), a transfer mechanism (300) and an inner support mechanism (400) are installed on the frame. The conveyor belt (100) is used to transport the box bottom. The inner support mechanism (400) is used to clamp and support the main box shell from the inside. The transfer mechanism (300) is used to position the box bottom at the upper opening of the main box shell. The welding structure (200) is used to realize welding between the box bottom and the main box shell. The inner support mechanism (400) comprises a mounting seat (402) and a linear module three (401) driving the mounting seat (402) to move in a horizontal direction. An inner support component is mounted on the mounting seat (402). The inner support component comprises a rotating seat (403) whose axis is vertical and rotatably mounted on the mounting seat (402) and a motor one (404) driving the rotating seat (403) to rotate. A frame platform (405) is arranged on the upper end surface of the rotating seat (403). The frame platform (405) An inner support assembly (406) is arranged inside, the upper support end of the inner support assembly (406) extends out of the frame platform (405), and an escape opening is arranged at the upper end of the frame platform (405). The inner support assembly (406) includes a lifting seat (408) and a linear module group (407) for driving the lifting seat (408) to move up and down. The lifting seat (408) is provided with an inner support component (409), and the inner support component (409) is provided with four groups and respectively supports the four inner walls of the main box shell.

2. The automatic high-precision welding device for the power battery housing according to claim 1 is characterized in that: The inner support component (409) includes a slide seat (4092) mounted on the lifting seat (408) for sliding in the horizontal direction and a linear module (4091) for driving the slide seat (4092) to move. The upper end of the slide seat (4092) extends out of the frame platform (405) and is provided with a vertically arranged middle support plate (4093). The upper and lower ends of the middle support plate (4093) are both provided with convex plates extending toward the inner region. A vertically arranged lead screw (4095) and a guide rail are installed between the two convex plates. The lead screw (4095) and the guide rail are arranged on the slide seat (4095). The guide rail (4092) is connected to the guide rail (4093) by a motor 2 (4094) on the guide rail (4092). The guide rail (4095) is divided into two threaded sections with opposite thread directions along its own axial direction. A driving seat is arranged on each threaded section. The driving seat and the guide rail are slidably connected. A vertically arranged side supporting plate (4096) is arranged on each side of the middle supporting plate (4093) along the movement direction of the sliding seat (4092). The side supporting plate (4096) and the driving seat are connected by a folding piece. The upper ends of the side supporting plates (4096) and the middle supporting plate (4093) are flush.

3. The automatic high-precision welding device for the power battery housing according to claim 2 is characterized in that: The folding member includes two connecting rods (4097) arranged crosswise and hingedly connected, the hinge between the two connecting rods (4097) is located at the middle position of the connecting rods (4097), one end of one connecting rod (4097) is hinged to the middle support plate (4093), and the other end is hinged to the side support plate (4096) to form a vertical sliding connection, and one end of the other connecting rod (4097) is hinged to the driving seat, and the other end is hinged to the side support plate (4096).

4. The automatic high-precision welding device for the power battery housing according to claim 2 is characterized in that: Among the four groups of inner support components (409), the movement direction of the slide seat (4092) of one group of inner support components (409) is parallel to the conveying direction of the conveyor belt (100), and the movement directions of the slide seats (4092) in two adjacent groups of inner support components (409) are perpendicular to each other.

5. The automatic high-precision welding device for the power battery housing according to claim 3 is characterized in that: The transfer mechanism (300) includes a correction component (301) and a transfer component (302).

6. The automatic high-precision welding device for the power battery housing according to claim 5 is characterized in that: The correction member (301) is located above the conveyor belt (100), and comprises a transverse plate (3011) slidably mounted on the frame along the conveying direction of the conveyor belt (100), the extension direction of the transverse plate (3011) is parallel to the width direction of the conveyor belt (100), two transverse plates (3011) are arranged along their own sliding direction, the distance between the two transverse plates (3011) is adjustable, and the sides facing each other of the two transverse plates (3011) are formed by a lower inclined surface and a The conveyor belt (100) is provided with two longitudinal plates (3012), the longitudinal plates (3012) extending in a direction parallel to the conveying direction of the conveyor belt (100), and two longitudinal plates (3012) are arranged along the width direction of the conveyor belt (100). The two longitudinal plates (3012) are provided with two longitudinal plates (3012) on opposite sides thereof, and the longitudinal plates (3012) are provided with two longitudinal plates (3012) and an upper plane (2), and the distance between the two longitudinal plates (3012) decreases from bottom to top.

7. The automatic high-precision welding device for the power battery housing according to claim 6 is characterized in that: A threaded shaft parallel to the sliding direction of the horizontal plate (3011) is installed on the frame, and the threaded shaft is divided into two spiral sections with opposite thread directions along the axis direction, and the two spiral sections are respectively threadedly connected to the two horizontal plates (3011); A guide hole 1 is provided on the longitudinal plate (3012) and its guiding direction is parallel to the conveying direction of the conveyor belt (100); a guide hole 2 is provided on the transverse plate (3011) and its guiding direction is parallel to the width direction of the conveyor belt (100); bolts and nuts are installed between the guide hole 1 and the guide hole 2, and the bolts are connected to the nuts after passing through the guide hole 1 and the guide hole 2.

8. The automatic high-precision welding device for the power battery housing according to claim 6 is characterized in that: The transfer member (302) comprises a movable seat (304) and a linear module (303) for driving the movable seat (304) to move along the width direction of the conveyor belt (100); a movable seat (306) and a linear module (305) for driving the movable seat (306) to move along the vertical direction are installed on the movable seat (304); a connecting column (307) extends from the bottom of the movable seat (306); a transverse seat (308) is arranged at the bottom of the connecting column (307); horizontally arranged transverse guide rods (309) extend from both sides of the transverse seat (308); a longitudinal seat (311) is slidably installed on each transverse guide rod (309); a limiting ring (1) is arranged at the free end of the transverse guide rod (309); and a transverse spring (310) located between the limiting ring (1) and the longitudinal seat (311) is sleeved on the outside of the transverse guide rod (309); There is a base (314) below the longitudinal seat (311), and two longitudinal guide rods (312) arranged horizontally are installed on the base (314). The longitudinal guide rods (312) and the transverse guide rods (309) are perpendicular to each other. The two longitudinal guide rods (312) are respectively slidably connected to the two longitudinal seats (311). Both ends of the longitudinal guide rods (312) are provided with a second limit ring located outside the longitudinal seat (311). The outer sleeve of the longitudinal guide rods (312) is provided with a longitudinal spring (313) located between the second limit ring and the longitudinal seat (311). A turntable (315) is rotatably installed at the middle position of the base (314), and a damping is provided at the rotation installation position. A plurality of adsorption heads (316) are arranged in an array on the lower end surface of the turntable (315), and the plurality of adsorption heads (316) are connected by a negative pressure pipe, and a negative pressure pump is connected to the end of the negative pressure pipe.

9. The automatic high-precision welding device for the power battery housing according to claim 8 is characterized in that: A friction seat (318) is arranged on the longitudinal seat (311), a vertical spring (319) is arranged between the friction seat (318) and the longitudinal seat (311), the elastic force of the vertical spring (319) drives the friction seat (318) to move upward, and a cylinder (317) for driving the friction seat (318) to move downward is arranged on the longitudinal seat (311), and two arc surfaces are arranged on the longitudinal seat (311), and initially, the two arc surfaces are respectively located directly above the transverse guide rod (309) and the longitudinal guide rod (312).

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