CN218612260U - Laser welding apparatus - Google Patents

Abstract

The utility model discloses a laser welding equipment. The utility model discloses a laser welding equipment is used for welding current collector and electric core, including welding set, welding jig, rotatory deviation correcting device and CCD camera, welding set, welding jig and rotatory deviation correcting device set gradually along vertical direction, are equipped with logical groove on the welding jig for see through laser; the rotary deviation correcting device comprises a positioning sleeve, a rotary seat, a mounting seat, a rotary mechanism and a jacking mechanism, wherein the rotary mechanism can drive the rotary seat to rotate relative to the mounting seat, and the jacking mechanism enables the mounting seat to move along the vertical direction until the mounting seat is abutted against the welding jig; the CCD camera is positioned on the upper side of the rotary deviation correcting device and can irradiate the welding area of the current collecting disc and generate an image signal; the rotating mechanism drives the rotating seat to rotate to a set state based on the image signals, so that the welding area on the current collecting disc can be exposed through the through groove on the welding jig. The laser welding equipment can automatically realize the steps of fixing, aligning and pressing in the welding process.

Description

Laser welding apparatus

Technical Field

The utility model relates to a battery manufacturing field especially relates to a laser welding equipment.

Background

In the correlation technique, when the current collecting disc is welded with the electric core, the current collecting disc needs to be manually placed on the electric core for preliminary fixation, then the current collecting disc is compressed by a welding jig and is welded, a welding area on the current collecting disc corresponds to a through groove on the welding jig one by one in the fixing process, so that the welding area of the current collecting disc can be exposed after the welding jig is compressed, the manual operation is carried out, the fixing, alignment and compression steps of the current collecting disc are complicated, and the working efficiency is very low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a laser welding equipment can realize fixing, aiming at and compressing tightly the step among current collector and the electric core welding process automizedly.

According to the utility model discloses a laser welding equipment of first aspect embodiment for welding current collector and electric core, include:

a welding device;

the welding jig is arranged at the lower side of the welding device, and a through groove is formed in the welding jig and used for allowing laser to penetrate through;

the rotary deviation correcting device is arranged on the lower side of the welding jig and comprises a positioning sleeve, a rotary seat, an installation seat, a rotary mechanism and a jacking mechanism, wherein the positioning sleeve is used for placing the current collecting disc and the battery cell;

the CCD camera is positioned on the upper side of the rotation deviation correcting device and can irradiate the welding area of the current collecting disc and generate an image signal;

wherein, rotary mechanism is based on image signal drive the roating seat is rotatory to the settlement state, so that welding area on the current collection dish can see through logical groove on the welding jig exposes.

According to the utility model discloses laser welding equipment has following beneficial effect at least: the laser welding equipment can improve the welding quality by arranging the welding jig; the CCD camera and the rotary deviation correcting device are arranged, so that the position of a welding area on the current collecting disc can be automatically aligned with the position of a through groove on the welding jig, manual visual alignment operation is not needed, the welding efficiency and precision of the current collecting disc and the battery cell are greatly improved, and the possibility of welding deviation, insufficient welding and the like is reduced; still include climbing mechanism among the rotatory deviation correcting device, can realize the lifting of current collector dish and electric core after accomplishing the alignment operation to make current collector dish pressurized hug closely in electric core, be favorable to improving welded quality. The laser welding equipment has the advantages that the automation degree is high, all parts are mutually matched, the fixation, alignment, compression and other operations in the welding process of the current collecting disc and the battery cell can be automatically realized, and the welding efficiency of the current collecting disc and the battery cell is greatly improved.

According to some embodiments of the utility model, the laser welding equipment still includes the guide rail, the guide rail with the mount pad is connected, in order to drive the mount pad removes to primary importance or second place, welding set with the welding jig correspond set up in the top of primary importance, the CCD camera correspond set up in the top of second place.

According to some embodiments of the present invention, the laser welding apparatus includes at least two of the rotation deviation rectifying devices, at least two of the welding jigs, and one of the welding devices, each of the rotation deviation rectifying devices is disposed in parallel, and the welding device can move along a direction in which the rotation deviation rectifying devices are disposed in parallel;

the mounting seat can also move to a third position along the guide rail and is used for mounting or dismounting the battery core and the current collecting disc, and when one of the rotary deviation rectifying devices is located at the first position, at least one of the rotary deviation rectifying devices is located at the third position.

According to some embodiments of the present invention, the CCD camera is connected to the welding device, so that the CCD camera and the welding device can move synchronously.

According to the utility model discloses a some embodiments, the roating seat with one in the mount pad is provided with two spacing response pieces, and another is provided with two inductive switch, the roating seat for the mount pad has initial position and two first extreme positions, two first extreme position is located respectively initial position's both sides, first extreme position with initial position is first settlement angle to the contained angle of center of rotation, works as the roating seat is rotatory to during the first extreme position, inductive switch can sense spacing response piece, and control rotary mechanism stall.

According to some embodiments of the utility model, the roating seat with one in the mount pad is provided with two spacing posts, and another is provided with two spacing grooves, the roating seat for the mount pad still has two second extreme positions, two the second extreme position is located respectively initial position's both sides, the second extreme position with initial position is the second angle of settlement to the contained angle of rotation center, first angle of settlement is less than the second angle of settlement, works as the roating seat is rotatory extremely during the second extreme position, spacing post with spacing groove butt, in order to restrict the rotation of roating seat.

According to some embodiments of the utility model, the roating seat includes first plate and the second plate that sets gradually along vertical direction, the position sleeve set up in on the first plate, the roating seat is still including guide and the elastic component that extends along vertical direction, the guide wears to locate first plate with the second plate, so that first plate can be followed the guide for the second plate removes, the elastic component cover is located first plate with between the second plate on the guide, just the both ends of elastic component respectively with first plate with the butt of second plate.

According to some embodiments of the present invention, the rotary base further comprises a third plate and a pressure sensor, the third plate is connected to the rotary mechanism, the guide is disposed on the third plate, the second plate can be moved relative to the third plate along the guide, the pressure sensor is disposed between the second plate and the third plate, and the pressure sensor abuts against the second plate and the third plate respectively.

According to the utility model discloses a some embodiments, the position sleeve includes the main part, set up the through-hole on the main part, the through-hole link up the main part is followed the axial of through-hole, be provided with the correlation switch on the roating seat.

According to some embodiments of the utility model, the position sleeve still includes the bottom plate, be provided with first waist type hole on the bottom plate, second waist type hole has been seted up on the corresponding position of roating seat, first waist type hole with second waist type hole sets up perpendicularly for adjust the position sleeve and be in position on the roating seat.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic structural diagram of a laser welding apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic structural diagram of a rotation deviation rectifying device according to an embodiment of the present invention;

FIG. 4 is a top view of the rotation deviation correcting device according to the embodiment of the present invention;

fig. 5 is a front view of the rotation deviation correcting device according to the embodiment of the present invention.

Reference numerals:

the welding device 100, the welding jig 200, the rotation deviation correcting device 300, the rotating seat 310, the limit induction sheet 311, the limit column 312, the correlation switch 313, the rotating electrical machine 314, the mounting seat 320, the induction switch 321, the limit groove 322, the limit protrusion 323, the locating sleeve 330, the locating ring 331, the first kidney-shaped hole 332, the first plate 340, the second kidney-shaped hole 341, the second plate 350, the third plate 360, the guide member 370, the elastic member 380, the pressure sensor 390, the CCD camera 400, the guide rail 500, the battery cell 600, the current collecting disc 650, and the welding area 651.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The laser welding apparatus is used for welding the current collecting plate 650 and the battery cell 600, and as shown in fig. 1, includes a welding device 100, a welding jig 200, a rotation deviation correcting device 300, and a CCD camera 400, where the welding device 100 includes a laser head capable of emitting laser light to a welding area 651 on the current collecting plate 650 for welding. The welding jig 200 is disposed at the lower side of the welding device 100, and the welding jig 200 is provided with a through groove for allowing laser to pass through. The through grooves of welding jig 200 are arranged corresponding to welding regions 651 on collecting plate 650, and after collecting plate 650 is lifted up to abut against the bottom surface of welding jig 200, welding regions 651 on collecting plate 650 can be exposed through the through grooves of welding jig 200, so that laser emitted by the laser head can irradiate collecting plate 650. The welding jig 200 is further provided with a dust removal structure and a ventilation structure corresponding to the through groove, the dust removal structure can adsorb dust generated in the welding process to avoid the dust escaping to influence the normal operation of the equipment, and the ventilation structure can blow out protective gas to the welding position to improve the welding quality.

In the prior art, when the alignment step of the current collecting disc 650 is performed by manual operation, the welding area 651 of the current collecting disc 650 and the positions of the through grooves on the welding jig 200 need to be continuously and repeatedly compared, the process is complicated, the working efficiency is very low, the visual alignment effect is poor, and quality problems such as welding deviation and insufficient welding are easily caused. The laser welding apparatus of the present application is therefore provided with a position that can be automatically rotated to align the welding region 651 and the through-slots on the current collecting disk 650.

Specifically, the rotation deviation rectifying device 300 is disposed at the lower side of the welding jig 200, as shown in fig. 3, and includes a rotating base 310, a mounting base 320, a positioning sleeve 330, a rotating mechanism and a jacking mechanism, where the positioning sleeve 330 is used for placing the current collecting tray 650 and the battery cell 600, specifically, in the placing process, the battery cell 600 is first placed in the positioning sleeve 330, so as to fix the battery cell 600. The length of the battery cell 600 is greater than the height of the positioning sleeve 330, so that the battery cell 600 partially protrudes from the positioning sleeve 330. Then, a positioning ring 331 is sleeved on the protruding portion of the battery cell 600, a positioning hole is formed in the middle of the positioning ring 331, one end of the positioning hole accommodates part of the battery cell 600, and the other end of the positioning hole can accommodate the current collecting disc 650, so that the battery cell 600 and the current collecting disc 650 are coaxially arranged, the current collecting disc 650 can be fixed, and the current collecting disc 650 is prevented from falling off in the moving or rotating process. It is understood that the positioning ring 331 may be first sleeved on the battery cell 600, and then the battery cell 600 may be placed into the positioning sleeve 330. The rotary base 310 is disposed on the mounting base 320, the rotary mechanism can drive the rotary base 310 to rotate relative to the mounting base 320, the rotary mechanism at least includes a rotary motor 314, a rotary shaft of the rotary motor 314 can be directly connected to the rotary base 310, and can also be connected to the rotary base 310 through a gear transmission structure, that is, the rotary base 310 is not coaxial with the rotary motor 314. Be connected with roating seat 310 through gear drive structure, can realize the big torque transmission of low rotational speed on the one hand, on the other hand also can set up rotating electrical machines 314 on climbing mechanism to the design of integrating of structure is convenient for.

The mount pad 320 is connected with climbing mechanism, and after rotary mechanism rotated suitable position, climbing mechanism can lift the subassembly of current collecting plate 650 and electric core 600, until current collecting plate 650 and welding jig 200's bottom surface butt to compress tightly current collecting plate 650 and electric core 600 and then be convenient for weld, prevent to appear the welding gap at welding process.

The CCD camera 400 is located above the rotation correcting device 300, and can irradiate the welding area 651 of the current collecting plate 650 and generate an image signal, and the operation principle of the CCD camera 400 is well known in the art and will not be described in detail. The rotating mechanism is in communication connection with the CCD camera 400, the rotating base 310 is driven to rotate to a set state based on an image signal of the CCD camera 400, specifically, in the set state, the projection of the welding jig 200 and the current collecting disc 650 on a horizontal plane is achieved, the through groove area of the welding jig 200 is overlapped with the welding area 651 on the current collecting disc 650, and then after the jacking mechanism lifts the current collecting disc 650 to be abutted to the welding jig 200, the welding area 651 on the current collecting disc 650 can be exposed through the through groove in the welding jig 200, so that the laser head can emit laser welding.

Based on the above, the laser welding equipment of the application can improve the welding quality by arranging the welding jig 200; by arranging the CCD camera 400 and the rotary deviation-correcting device 300, the automatic alignment of the position of the welding region 651 on the current collecting disc 650 and the position of the through groove on the welding jig 200 can be realized, the manual visual alignment operation is not needed, the welding efficiency and precision of the current collecting disc 650 and the battery cell 600 are greatly improved, and the possibility of welding deviation, cold welding and the like is reduced; the rotary deviation correcting device 300 further comprises a jacking mechanism, which can lift the current collecting disc 650 and the battery cell 600 after the alignment operation is completed, so that the current collecting disc 650 is pressed to be tightly attached to the battery cell 600, and the welding quality is improved. The laser welding equipment has the advantages that the automation degree is high, all the parts are mutually matched, the fixing, alignment, compression and other operations in the welding process of the current collecting disc 650 and the battery cell 600 can be automatically realized, and the welding efficiency of the current collecting disc 650 and the battery cell 600 is greatly improved.

In some embodiments, the laser welding apparatus further includes a guide rail 500, the guide rail 500 is connected to the mounting base 320 to drive the mounting base 320 to move to a first position or a second position, the welding device 100 and the welding jig 200 are correspondingly disposed above the first position, and the CCD camera 400 is correspondingly disposed above the second position. The mounting base 320 can also move to a third position for loading and unloading on the guide rail 500, after loading at the third position, the guide rail 500 drives the mounting base 320 to move to the second position, so that the CCD camera 400 irradiates the welding area 651 of the current collecting plate 650 to generate an image signal, the image signal is compared with an image signal preset in the CCD camera 400, and an instruction that the rotating mechanism includes a rotating direction and a rotating angle is given, so that the rotating mechanism drives the current collecting plate 650 to rotate to a set state. Then, the guide rail 500 drives the mounting base 320 to continuously move to the first position along the guide rail 500, the lifting mechanism works at the first position to lift the current collecting disc 650, and after the current collecting disc 650 abuts against the welding jig 200, the welding device 100 starts welding. Because CCD camera 400, welding set 100 and welding jig 200 all are located the upside of mount pad 320, through setting up the primary importance for taking place the welded position, set up the secondary importance for taking place the position that the rotation was rectified, thereby can avoid welding jig 200 to interfere the light path of CCD camera 400 and influence the formation of image effect of CCD camera 400.

In some embodiments, the laser welding apparatus includes at least two rotating deviation rectifying devices 300, at least two welding jigs 200 and one welding device 100, the rotating deviation rectifying devices 300 are arranged in parallel, as shown in fig. 1 and fig. 2, in this embodiment, two rotating deviation rectifying devices 300, two welding jigs 200 and one welding device 100 are provided, the parallel arrangement direction of the rotating deviation rectifying devices 300 is set as a first direction, a second direction is set to be in a horizontal plane and perpendicular to the first direction, and the two welding jigs 200 are arranged in sequence along the first direction and are fixedly arranged in the laser welding apparatus. The rotation correcting device 300 can move toward the second direction along the guide rail 500, and the first position, the second position, and the third position are sequentially disposed along the second direction. When one of the rotating deviation rectifying devices 300 is located at the first position, at least one rotating deviation rectifying device 300 is located at a third position, as shown in fig. 2, fig. 2 is a top view of fig. 1, so that the welding device 100 and the welding jig 200 in fig. 1 are hidden for easy observation, the rotating deviation rectifying device 300 on the left side in fig. 2 is located at the first position, and the rotating deviation rectifying device 300 on the right side is located at the third position. And the welding device 100 can move along the first direction, and further, when one rotary deviation correcting device 300 is located at the first position, the welding device 100 moves to the position above the rotary deviation correcting device 300 and the corresponding welding jig 200 to perform the laser welding operation, and meanwhile, the other rotary deviation correcting device 300 is located at the third position to perform the loading and unloading operation. Through the arrangement of the double channels or the multiple channels, a worker can synchronously carry out laser welding operation in one channel of the same laser welding equipment while carrying out feeding and discharging operation in the other channel, the waiting time of processing is greatly shortened, and the production efficiency is improved. In addition, the same welding apparatus 100 is shared between two or more channels, so that the manufacturing cost of the laser welding equipment can be greatly reduced.

Based on a modified embodiment of the above-described embodiment, as shown in fig. 1, the CCD camera 400 is attached to the welding apparatus 100 so that the CCD camera 400 and the welding apparatus 100 can move in synchronization. Further, only one CCD camera 400 needs to be disposed to move with the movement of the welding device 100, as shown in fig. 1, the CCD camera 400 is disposed on the side surface of the welding device 100 and protrudes from the welding device 100, so as to avoid the welding jig 200 and prevent the welding jig 200 from interfering with the light path of the CCD camera 400.

In some embodiments, as shown in fig. 3 and 4, one of the rotary base 310 and the mounting base 320 is provided with two limit sensing pieces 311, and the other is provided with two sensing switches 321, the rotary base 310 has an initial position and two first limit positions with respect to the mounting base 320, the initial position is a position where the rotary base 310 is not rotated with respect to the mounting base 320, and the first limit position is a position of a maximum angle that the rotary base 310 can be rotated with respect to the mounting base 320 under a conventional condition. The two first limit positions are respectively located at two sides of the initial position, and an included angle between the first limit position and the rotation center of the initial position is a first set angle, that is, the rotating base 310 reaches the first limit position when rotating clockwise or counterclockwise at the initial position by the first set angle. In this embodiment, the swivel base 310 is provided with two limit sensing pieces 311, the mounting base 320 is provided with two sensing switches 321, and when the swivel base 310 swivels to the first limit position, the sensing switches 321 can sense the limit sensing pieces 311, and control the swivel mechanism to stop rotating, and the laser welding device alarms to remind the operator that the device swivel angle exceeds the range. The arrangement of the inductive switch 321 and the inductive sheet can realize soft limit when the rotation exceeds the range, and the maximum rotation angle under the normal condition is limited by a non-contact sensor.

Further, as shown in fig. 3 and 5, one of the rotating base 310 and the mounting base 320 is provided with two limiting posts 312, and the other is provided with two limiting grooves 322, the rotating base 310 further has two second limit positions with respect to the mounting base 320, the two second limit positions are respectively located at two sides of the initial position, and an included angle between the second limit position and the rotation center from the initial position is a second set angle, that is, the rotating base 310 reaches the second limit position when rotating in the initial position by clockwise rotation or counterclockwise rotation by a second set angle. It should be noted that the first setting angle is smaller than the second setting angle, in this embodiment, the rotating base 310 is provided with the limiting post 312, the mounting base 320 is provided with the limiting protrusion 323, and two sides of the limiting protrusion 323 are respectively provided with the limiting groove 322. Further, when the rotary base 310 rotates to the second limit position, the stopper pin 312 abuts against the stopper groove 322, and the rotation of the rotary base 310 is restricted. The setting of spacing post 312 and spacing groove 322 is on above-mentioned soft spacing basis, for further guaranteeing the equipment safety under the fault condition hard spacing, when equipment trouble, still can't the stall after the roating seat 310 is rotatory to exceed first extreme position, then when roating seat 310 continues to rotate to second extreme position, stop roating seat 310 to continue to rotate through spacing groove 322 and spacing post 312 butt to the rotatory maximum angle under the equipment fault condition is injectd to hard spacing through the contact.

In some embodiments, as shown in fig. 3, the rotating base 310 includes a first plate 340 and a second plate 350 sequentially arranged along a vertical direction, the positioning sleeve 330 is disposed on the first plate 340, the rotating base 310 further includes a guide 370 and an elastic member 380 extending along the vertical direction, the guide 370 is disposed through the first plate 340 and the second plate 350, the elastic member 380 is sleeved on the guide 370 between the first plate 340 and the second plate 350, and two ends of the elastic member 380 abut against the first plate 340 and the second plate 350, respectively. Further, when the jacking mechanism lifts the collecting plate 650 into abutment with the welding jig 200, the first plate 340 is subjected to a reaction force to compress the elastic member 380, and the first plate 340 moves relative to the second plate 350 along the guide member 370 to cushion the impact force applied to the first plate 340, while the pressing force applied to the collecting plate 650 can be adjusted by the compression distance of the elastic member 380. Further, the rotary base 310 further includes a third plate 360 and a pressure sensor 390, the first plate 340, the second plate 350 and the third plate 360 are sequentially arranged in a top-to-bottom direction, the third plate 360 is connected with the rotating mechanism, the guide 370 is arranged on the third plate 360, the second plate 350 can move relative to the third plate 360 along the guide 370, the pressure sensor 390 is arranged between the second plate 350 and the third plate 360, and the pressure sensor 390 abuts against the second plate 350 and the third plate 360 respectively to detect the magnitude of the pressing force. The pressing force can be buffered and adjusted by the elastic member 380 between the first plate member 340 and the second plate member 350, and the magnitude of the pressing force can be detected by the pressure sensor 390 between the second plate member 350 and the third plate member 360 to facilitate quantitative adjustment.

In some embodiments, the positioning sleeve 330 includes a main body, a through hole is formed on the main body, the through hole penetrates through the main body, and as shown in fig. 3, the rotary base 310 is provided with a correlation switch 313 along an axial direction of the through hole. When the laser welding device works, the correlation switch 313 is turned on, an optical signal is sent out from one axial end of the through hole, the other end of the through hole is received, after the battery cell 600 is placed in the positioning sleeve 330, the battery cell 600 blocks the transmission of the optical signal, and then the laser welding device receives a signal that the battery cell 600 is placed in the positioning sleeve 330, and the mounting base 320 is controlled to move along the guide rail 500 based on the signal. Through setting up correlation switch 313, the degree of automation of this laser welding equipment has further been improved, need not the manual control mount 320 and moves or stops.

In some embodiments, as shown in fig. 3, the positioning sleeve 330 further includes a bottom plate, a first kidney-shaped hole 332 is formed on the bottom plate, a second kidney-shaped hole 341 is formed at a corresponding position of the rotating base 310, and the first kidney-shaped hole 332 and the second kidney-shaped hole 341 are vertically disposed to adjust a position of the positioning sleeve 330 on the rotating base 310. The rotating deviation correcting device 300 further includes a threaded fastener, which can be inserted into the first kidney-shaped hole 332 and the second kidney-shaped hole 341, so that when the threaded fastener is loosened, the first kidney-shaped hole 332 and the second kidney-shaped hole 341 can move relatively, and specifically, when the threaded fastener is tightened, the position of the positioning sleeve 330 on the rotating base 310 is fixed.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Laser welding equipment for welding current collector dish and electric core, its characterized in that includes:

a welding device;

the welding jig is arranged at the lower side of the welding device, and a through groove is formed in the welding jig and used for allowing laser to penetrate through;

the rotary deviation correcting device is arranged on the lower side of the welding jig and comprises a positioning sleeve, a rotary seat, an installation seat, a rotary mechanism and a jacking mechanism, wherein the positioning sleeve is used for placing the current collecting disc and the battery cell;

the CCD camera is positioned on the upper side of the rotation deviation correcting device and can irradiate the welding area of the current collecting disc and generate an image signal;

wherein, rotary mechanism is based on image signal drive the roating seat is rotatory to the settlement state, so that welding area on the current collection dish can see through logical groove on the welding jig exposes.

2. The laser welding apparatus according to claim 1, further comprising a guide rail connected to the mounting base to drive the mounting base to move to a first position or a second position, wherein the welding device and the welding jig are correspondingly disposed above the first position, and the CCD camera is correspondingly disposed above the second position.

3. The laser welding apparatus according to claim 2, wherein the laser welding apparatus comprises at least two of the rotating deviation rectifying devices, at least two of the welding jigs, and one of the welding devices, the rotating deviation rectifying devices are arranged in parallel, and the welding device is capable of moving in a direction in which the rotating deviation rectifying devices are arranged in parallel;

the mounting seat can also move to a third position along the guide rail and is used for mounting or dismounting the battery core and the current collecting disc, and when one of the rotary deviation rectifying devices is located at the first position, at least one of the rotary deviation rectifying devices is located at the third position.

4. The laser welding apparatus according to claim 3, wherein the CCD camera is connected to the welding device so that the CCD camera and the welding device can move synchronously.

5. The laser welding apparatus according to claim 1, wherein one of the rotary base and the mounting base is provided with two limit sensing pieces, and the other is provided with two sensing switches, the rotary base has an initial position and two first limit positions relative to the mounting base, the two first limit positions are respectively located on two sides of the initial position, an included angle from the first limit position and the initial position to a rotation center is a first set angle, and when the rotary base rotates to the first limit position, the sensing switches can sense the limit sensing pieces and control the rotation mechanism to stop rotating.

6. The laser welding apparatus according to claim 5, wherein one of the rotary holder and the mounting holder is provided with two limiting posts, and the other is provided with two limiting grooves, the rotary holder further has two second limiting positions relative to the mounting holder, the two second limiting positions are respectively located on two sides of the initial position, an included angle from the second limiting position and the initial position to a rotation center is a second set angle, the first set angle is smaller than the second set angle, and when the rotary holder rotates to the second limiting position, the limiting posts abut against the limiting grooves to limit rotation of the rotary holder.

7. The laser welding apparatus according to claim 1, wherein the rotary base includes a first plate and a second plate sequentially arranged in a vertical direction, the positioning sleeve is disposed on the first plate, the rotary base further includes a guide member and an elastic member extending in the vertical direction, the guide member is disposed through the first plate and the second plate so that the first plate can move relative to the second plate along the guide member, the elastic member is sleeved on the guide member between the first plate and the second plate, and two ends of the elastic member are respectively abutted against the first plate and the second plate.

8. The laser welding apparatus according to claim 7, wherein the swivel base further includes a third plate member and a pressure sensor, the third plate member is connected to the swivel mechanism, the guide member is provided on the third plate member, the second plate member is movable relative to the third plate member along the guide member, and the pressure sensor is provided between the second plate member and the third plate member, and abuts against the second plate member and the third plate member, respectively.

9. The laser welding apparatus according to claim 1, wherein the positioning sleeve includes a main body portion, a through hole is formed in the main body portion, the through hole penetrates through the main body portion, and a relative ejection switch is disposed on the rotary base in an axial direction of the through hole.

10. The laser welding apparatus as claimed in claim 1, wherein the positioning sleeve further comprises a bottom plate, a first kidney-shaped hole is formed in the bottom plate, a second kidney-shaped hole is formed in a corresponding position of the rotary base, and the first kidney-shaped hole and the second kidney-shaped hole are vertically arranged and used for adjusting the position of the positioning sleeve on the rotary base.

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