CN116551234B - Cell module welding mechanism, cell module welding assembly line and welding method - Google Patents

Abstract

The invention provides a welding mechanism of an electric core module, a welding assembly line of the electric core module and a welding method, relating to the field of electric core module welding, comprising the following steps: the welding device comprises a carrier, a carrier plate and a welding tool, wherein the carrier is of a hollow structure in a rectangular structure, the welding tool is borne in the carrier, and the carrier is supported at the top end of the carrier plate; the welding tool is integrally composed of a lower welding plate, a plurality of rows of batteries vertically supported and inserted on the lower welding plate and an upper welding plate at the top end of each battery, a rectangular limiting frame is welded at the middle position of a carrier bottom plate, and the lower welding plate of the welding tool is in insertion fit with the rectangular limiting frame; the bottoms of the left end and the right end of the upper side plate of the carrier are symmetrically welded with the four butt-joint inserting shafts, the trouble that the sealing and positioning mechanism of the carrier is required to be loosened by additional manual operation before and after the welding process is avoided, the simplification of the operation steps of the opening and closing of the carrier and the operation steps of the disassembly and assembly of the welding tool inside the carrier are facilitated, and the use is convenient and efficient.

Description

Cell module welding mechanism, cell module welding assembly line and welding method

Technical Field

The invention relates to the technical field of cell module welding, in particular to a cell module welding mechanism, a cell module welding assembly line and a cell module welding method.

Background

The welding of cylinder battery module generally adopts resistance welding mode, and because the cylinder battery needs welded position more, so welding speed is slower than other stations, and the conveyer belt of transportation battery module sends the battery module into the welding station through sharp transportation mode, under the incomplete circumstances of welding, can't carry the battery to next welding station, influence the efficiency to battery batch welding process, current carrier that carries welding mechanism (frock) in addition, adopt locking mechanism to carry out locking location (as shown in fig. 9) to upper cover pair more, this kind of locking positioning mechanism is comparatively traditional, all need extra manual operation to implement elasticity in proper order to all locks when carrying out the switch to the carrier around welding at every turn, the operation is used comparatively trouble.

Disclosure of Invention

In view of this, the invention provides a welding mechanism for a cell module, a welding assembly line for a cell module and a welding method, so as to solve the problems that a locking mechanism is usually adopted to lock and position an upper cover pair of a carrier for carrying the welding mechanism (tool), the locking and positioning mechanism is more traditional, and when the carrier is switched on and off before and after each welding, the locking and positioning mechanism needs to be additionally manually operated to sequentially implement tightness for all locks, and the operation and the use are more troublesome.

The invention provides a cell module welding mechanism, a cell module welding assembly line and a cell module welding method, which concretely comprise the following steps: the welding device comprises a carrier, a carrier plate and a welding tool, wherein the carrier is of a hollow structure in a rectangular structure, the welding tool is borne in the carrier, and the carrier is supported at the top end of the carrier plate; the welding tool is integrally composed of a lower welding plate, a plurality of rows of batteries vertically supported and inserted on the lower welding plate and an upper welding plate at the top end of each battery, a rectangular limiting frame is welded at the middle position of a carrier bottom plate, and the lower welding plate of the welding tool is in insertion fit with the rectangular limiting frame; two carrier upper side plates are fixedly locked on the front side and the rear side of the carrier top plate through screws, and two carrier lower side plates are fixedly locked on the front side and the rear side of the carrier bottom plate through screws; four butt-joint inserting shafts are symmetrically welded at the bottoms of the left end and the right end of the upper side plate of the two carriers, four positioning holes which are not penetrated are symmetrically formed in the left end section and the right end section of the lower side plate of the two carriers, and the four butt-joint inserting shafts are correspondingly matched with the four positioning holes in an inserting manner; the carrier plate is of a rectangular structure, four corners of the top end of the carrier plate are symmetrically locked and provided with four L-shaped limiting plates through screws, and four corner parts of the carrier bottom plate are correspondingly matched with the four L-shaped limiting plates in an inserting manner; two positioning plates are symmetrically welded at the bottoms of the upper side plates of the carriers, two groups of mounting plates are symmetrically welded at the top ends of the lower side plates of the two carriers, four six-edge inserting shafts are symmetrically installed on the four groups of mounting plates in a penetrating and sliding mode through spring pushing, and when the upper side plates of the two carriers and the lower side plates of the two carriers are spliced together in opposite insertion mode, the head end sections of the six-edge inserting shafts and the four positioning plates penetrate through insertion connection.

Further, two six-edge positioning shafts are symmetrically welded between the L-shaped limiting plates in the front-back direction, two vertical top plates are symmetrically and slidably arranged on the left end section and the right end section of the two six-edge positioning shafts, and two triangular top blocks are welded on the top end sections of the two vertical top plates in the left-right direction in opposite directions.

Further, two plum blossom-shaped knobs are symmetrically arranged on the middle sections of the six-edge positioning shafts in a front-back symmetrical mode, two connecting rods are connected on the outer circumferences of the knobs in a left-right opposite mode, and tail ends of the two connecting rods are correspondingly connected with the two vertical top plates in a rotating mode.

Further, two F-shaped supporting rods are symmetrically welded upwards on the middle sections of the two six-edge positioning shafts, two vertical inserting shafts are installed on the horizontal parts of the two F-shaped supporting rods in a penetrating and sliding mode, and the bottom sections of the two vertical inserting shafts are correspondingly in plug-in connection with positioning holes on the outer circles of the circumferences of the two knobs.

Further, four triangular stress blocks are welded at the tail ends of the six-edge inserting shafts through four L-shaped dowel bars and are arranged left and right in opposite directions, and when the upper side plates of the two carriers and the lower side plates of the two carriers are spliced together in opposite insertion, the triangular stress blocks correspondingly contact with inclined surfaces of the triangular jacking blocks in an abutting mode.

Furthermore, two positioning seats are symmetrically fixed at the outer eave positions of the left side and the right side of the carrier plate through screws, and the whole positioning seat is formed by welding two L-shaped positioning blocks which are symmetrical front and back and are provided with fixing holes at the top ends.

Further, the method comprises the steps of: the device comprises a frame, a carrier plate conveyer belt and a lifting cylinder, wherein the top end of the frame is symmetrically welded with two tables, two machine boxes are arranged on the left side and the right side of the front half part of the frame, and the top ends of the two tables are welded with positioning frames with two rectangular structures at left and right intervals; two carrier plate conveying belts are symmetrically arranged on the top end part of the frame in a left-right mode and used for supporting and conveying the carrier plates; two groups of lifting cylinders are symmetrically hung at the bottoms of the two tables in a left-right mode, a carrier lifting shovel with an L-shaped structure is fixed at the top end of a telescopic rod of each lifting cylinder, and the two carrier lifting shovels are matched with the carrier in a clamping mode; four corners of the bottom of the positioning frame are symmetrically fixed with four vertical supporting shafts, and the bottoms of the four vertical supporting shafts are fastened with two bedplate through screw locks; four positioning bolts are symmetrically fixed at the bottoms of the left side and the right side of the positioning frame, and when the carrier plate and the carrier are lifted upwards to be in abutting contact with the positioning frame, the four positioning bolts are correspondingly matched with four fixing holes at the top ends of the two positioning seats in a plugging manner.

Further, the method comprises the following operation steps:

① . Firstly, a first carrier covers a lower welding plate, a battery and an upper welding plate, a welding tool is wrapped in the lower welding plate, and a top plate of the carrier and two carrier upper side plates are inserted and covered on a bottom plate of the carrier and two carrier lower side plates;

② . The carrier is placed between the L-shaped limiting plates at four places of the carrier plate for one-time positioning;

③ . The carrier plate conveying belt is conveyed to the bottom of a first positioning frame below a first welding station, the first group of lifting cylinders drive two carrier plate lifting shovels to scoop up the carrier plate, and in the scooping process, four positioning bolts are in plug-in fit with four fixing holes at the top ends of two positioning seats to perform secondary positioning;

④ . The carrier after positioning is subjected to a welding procedure, and the carrier conveying belt can convey the second carrier to pass through the first welding station because the shoveled carrier is separated from the carrier conveying belt;

⑤ . The second carrier is placed between four L-shaped limiting plates of the second carrier and is positioned once, the carrier conveyor belt is transmitted to the bottom of a second positioning frame below a second welding station, two carrier lifting shovels are driven by a second group of lifting cylinders to scoop up the second carrier, in the scooping process, four positioning bolts are matched with four fixing holes at the top ends of two positioning seats in an inserting mode to perform secondary positioning, and the positioned carrier performs a welding procedure at the second welding station to reciprocate.

Advantageous effects

1. According to the invention, the carrier can be positioned twice before and after in the whole processing process, so that the positioning accuracy and the welding processing accuracy of the battery are effectively improved.

2. According to the invention, a corresponding number of welding stations can be added to compensate for production line stop caused by long welding time, so that the batch welding processing efficiency of the batteries is improved.

3. The invention can save the trouble of carrying out tightness on the closed positioning mechanism of the carrier by additional manual operation before and after welding processing, is beneficial to simplifying the operation steps of opening and closing the carrier and the operation steps of disassembling and assembling the welding tool inside the carrier, and is convenient and efficient to use.

4. According to the invention, the four vertical top plates are movably mounted by sliding as pushing force transmission components with four six-edge inserting shafts in a linkage driving function, and are jointly connected with the four connecting rods and the two knobs to form the four crank slide block mechanism, through the four mechanism, the two knobs can be pulled and pulled to drive the four vertical top plates to slide oppositely, so that the four triangular top blocks are separated from the four triangular force bearing blocks, the four six-edge inserting shafts can be flexibly and simply pulled out when the carrier is supported on the carrier by gravity, the trouble that the carrier and the carrier are lifted and separated to pull out the four six-edge inserting shafts and open the carrier to adjust the battery is avoided, and the flexibility of the elastic operation of the carrier sealing and positioning mechanism and the flexibility of the carrier switch are improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

The drawings described below are only for illustration of some embodiments of the invention and are not intended to limit the invention.

In the drawings:

FIG. 1 is a schematic diagram of a welding line configuration of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the bottom side structure of a welding line according to an embodiment of the present invention.

Fig. 3 is a carrier lifting state diagram according to an embodiment of the invention.

Fig. 4 is a carrier descent state diagram according to an embodiment of the present invention.

Fig. 5 is a schematic view of a carrier structure according to an embodiment of the invention.

Fig. 6 is a schematic structural diagram of a welding tool according to an embodiment of the present invention.

Fig. 7 is a schematic view of a carrier structure according to an embodiment of the invention.

Fig. 8 is a schematic view of a carrier upper plate according to an embodiment of the invention.

Fig. 9 is a schematic view of a carrier structure before modification of the present invention.

List of reference numerals

1. A frame; 101. a platen; 102. a vertical supporting shaft; 2. a chassis; 3. a positioning frame; 301. positioning a bolt; 4. a carrier; 401. a carrier upper side plate; 402. a carrier lower side plate; 403. a butt-joint insertion shaft; 404. a six-edge inserting shaft; 405. a mounting plate; 406. a positioning plate; 407. a triangular stress block; 5. a carrier plate conveyor belt; 6. a lifting cylinder; 601. a carrier plate lifting shovel; 7. a carrier plate; 701. a positioning seat; 702. an L-shaped limiting plate; 703. a six-edge positioning shaft; 704. a knob; 705. an F-shaped supporting rod; 706. a vertical inserting shaft; 707. a vertical top plate; 708. a connecting rod; 8. welding a tool; 801. and (5) welding a plate.

Detailed Description

In order to make the objects, aspects and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present invention.

Examples: please refer to fig. 1 to 9:

The invention provides a cell module welding mechanism, a cell module welding assembly line and a cell module welding method, comprising the following steps: the carrier 4, the carrier plate 7 and the welding tool 8 are arranged in a way that the carrier 4 is of a hollow structure in the whole rectangular structure, the interior of the carrier 4 is used for bearing the welding tool 8, and the carrier 4 is supported and placed at the top end of the carrier plate 7; the whole welding tool 8 consists of a lower welding plate, a plurality of rows of batteries vertically supported and inserted on the lower welding plate and an upper welding plate 801 at the top end of the batteries, a rectangular limit frame is welded at the middle position of the bottom plate of the carrier 4, and the lower welding plate of the welding tool 8 is in inserted fit with the rectangular limit frame; two carrier upper side plates 401 are fixedly locked on the front side and the rear side of the top plate of the carrier 4 through screws, and two carrier lower side plates 402 are fixedly locked on the front side and the rear side of the bottom plate of the carrier 4 through screws; four butt-joint insertion shafts 403 are symmetrically welded at the bottoms of the left end and the right end of the upper side plate 401 of the two carriers, four positioning holes which are not penetrated are symmetrically formed in the left end section and the right end section of the lower side plate 402 of the two carriers, and the four butt-joint insertion shafts 403 are correspondingly in plug-in fit with the four positioning holes; the carrier plate 7 is of a rectangular structure, four corners of the top end of the carrier plate 7 are symmetrically locked and provided with four L-shaped limiting plates 702 through screws, four corner parts of the bottom plate of the carrier 4 are correspondingly matched with the four L-shaped limiting plates 702 in an inserting manner, and the carrier 4 is positioned for the first time; two locating plates 406 are symmetrically welded at the bottoms of the two carrier upper side plates 401, two groups of mounting plates 405 are symmetrically welded at the top ends of the two carrier lower side plates 402, four six-edge inserting shafts 404 are symmetrically installed on the four groups of mounting plates 405 in a penetrating and sliding mode through spring pushing, when the two carrier upper side plates 401 and the two carrier lower side plates 402 are spliced together in a penetrating and inserting mode, the head end sections of the four six-edge inserting shafts 404 are matched with the four locating plates 406 in a penetrating and inserting mode, and the four six-edge inserting shafts 404 can plug and locate the top plate and the bottom plate of the carrier 4 and the two carrier upper side plates 401 and the two carrier lower side plates 402 together, so that sealing and shaping of the carrier 4 are completed.

Two six-edge positioning shafts 703 are symmetrically welded between the four L-shaped limiting plates 702 in front-back direction, two vertical top plates 707 are symmetrically and slidably arranged on the left end section and the right end section of the two six-edge positioning shafts 703, and two triangular top blocks are welded on the top end sections of the two vertical top plates 707 in left-right opposite directions.

The middle section of the two six-edge positioning shafts 703 is symmetrically provided with two plum blossom-shaped knobs 704 in a front-back rotating way, the circumference outer ring of each knob 704 is provided with two connecting rods 708 in a left-right opposite rotating way, the tail ends of the two connecting rods 708 are correspondingly connected with the two vertical top plates 707 in a rotating way, the four vertical top plates 707 serve as pushing force transmission components of the four six-edge inserting shafts 404 in a linkage driving function and are movably mounted in a sliding way, the pushing force transmission components are jointly connected with the four connecting rods 708 and the two knobs 704 to form a four-edge crank sliding block mechanism, through the four-edge mechanism, the four vertical top plates 707 can be pulled and driven to slide in opposite directions by the positive and negative rotation of the two knobs 704, so that the four-triangular top blocks are separated from the four-triangular force-bearing blocks 407, the four-edge six-edge inserting shafts 404 can be flexibly and simply pulled out, the trouble that the four-edge inserting shafts 404 can be pulled out and the four-edge inserting shafts 4 can be adjusted by batteries only by lifting and separating the carrier 4 from the carrier 7 on the carrier 7 when the carrier 4 is supported on the carrier 7 by gravity, and the flexibility of the operation of the closed positioning mechanism 4 is improved.

Two F-shaped support rods 705 are symmetrically and upwards welded on the middle section of the two six-edge positioning shafts 703, two vertical inserting shafts 706 are installed on the horizontal parts of the two F-shaped support rods 705 in a penetrating and sliding mode, and the bottom sections of the two vertical inserting shafts 706 are correspondingly in plug-in fit with positioning holes on the outer circumferences of the two knobs 704.

The tail end of the four-hexagonal-insert shaft 404 is welded with four triangular stress blocks 407 through four L-shaped dowel bars, the four triangular stress blocks 407 are arranged in a left-right opposite manner, when two carrier upper side plates 401 and two carrier lower side plates 402 are spliced together in an opposite manner, the four triangular stress blocks 407 are correspondingly abutted against the inclined surfaces of the four triangular jacking blocks, and according to the inclined surface guiding principle of the four triangular stress blocks 407 and the four triangular jacking blocks, when the carrier 4 wraps a welding tool 8 and falls down and is placed on the carrier 7, the four hexagonal-insert shaft 404 can drive opposite sliding and the four positioning plates 406 to penetrate and are matched with each other by utilizing the falling power linkage of the carrier 4, so that the tight closing and shaping of the carrier 4 are completed, and when the carrier 4 is lifted and unloaded after the welding is completed, the four triangular stress blocks 407 and the four triangular jacking blocks are lifted and separated, the springs on the four hexagonal-insert shaft 404 can automatically push the four triangular jack blocks to slide back and separate from the carrier 4, so that the carrier 4 is released, the additional operation steps of the welding tool is omitted, and the welding tool 4 is convenient to operate conveniently and fast, and fast to detach the carrier 4, and the welding tool is convenient to use; two positioning seats 701 are symmetrically fixed at the outer eave positions on the left side and the right side of the carrier plate 7 through screws, and the whole positioning seat 701 is formed by welding two L-shaped positioning blocks which are symmetrical front and back and are provided with fixing holes at the top ends.

Wherein, the top end of the frame 1 is welded with two tables 101 symmetrically left and right, two machine boxes 2 are arranged on the left and right sides of the front half part of the frame 1, and the top ends of the two tables 101 are welded and supported with two positioning frames 3 with rectangular structures left and right at intervals; two carrier plate conveying belts 5 are symmetrically arranged on the top end part of the frame 1 in a left-right mode, and the two carrier plate conveying belts 5 are used for supporting and conveying a carrier plate 7; two groups of lifting cylinders 6 are symmetrically hung at the bottoms of the two tables 101 in a left-right mode, a carrier plate lifting shovel 601 with an L-shaped structure is fixed at the top end of a telescopic rod of each lifting cylinder 6, and the two carrier plate lifting shovels 601 are matched with the carrier plate 7 in a clamping mode; four corners of the bottom of the positioning frame 3 are symmetrically fixed with four vertical supporting shafts 102, and the bottoms of the four vertical supporting shafts 102 are locked and fixed with two bedplate 101 through screws; four positioning bolts 301 are symmetrically fixed at the bottoms of the left side and the right side of the positioning frame 3, when the carrier 7 and the carrier 4 are lifted upwards to be in abutting contact with the positioning frame 3, the four positioning bolts 301 are correspondingly matched with four fixing holes at the top ends of two positioning seats 701 in a plugging manner, and positioning is carried out on the carrier 4 again in the welding process.

Specific use and action of the embodiment: when the invention is used, firstly, a first carrier 4 covers a lower welding plate, a battery and an upper welding plate 801, a welding tool 8 is wrapped in the lower welding plate, and a top plate of the carrier 4 and two carrier upper side plates 401 are inserted and covered on a bottom plate of the carrier 4 and two carrier lower side plates 402; the carrier 4 is placed between the L-shaped limiting plates 702 of the carrier plate 7 for one time positioning; the carrier plate conveying belt 5 is conveyed to the position below the first welding station, namely the bottom of the first positioning frame 3, the first group of lifting cylinders 6 drive the two carrier plate lifting shovels 601 to scoop up the carrier plates 7, and in the scooping process, the four positioning bolts 301 are in plug-in fit with four fixing holes at the top ends of the two positioning seats 701 to perform secondary positioning; the positioned carrier 4 is subjected to a welding procedure, and the carrier conveying belt 5 can convey the second carrier 4 to pass through the first welding station because the shoveled carrier 7 is separated from the carrier conveying belt 5; the second carrier 4 is placed between the four L-shaped limiting plates 702 of the second carrier 7 for one-time positioning, the carrier conveyer belt 5 is conveyed to the position below the second welding station, namely the bottom of the second positioning frame 3, the second carrier 7 is lifted by the two carrier lifting shovels 601 driven by the second group of lifting cylinders 6, in the lifting process, the four positioning bolts 301 are matched with the four fixing holes at the top ends of the two positioning seats 701 in an inserting manner for two-time positioning, the positioned carrier 4 is subjected to the welding process at the second welding station, and in this way, the corresponding number of welding stations can be increased to compensate for production line pause caused by long welding time, and the batch welding processing efficiency of batteries is improved.

Claims (4)

1. A cell module welding mechanism comprising: the welding device comprises a carrier (4), a carrier plate (7) and a welding tool (8), wherein the carrier (4) is of a hollow structure in the whole rectangular structure, the welding tool (8) is borne in the carrier (4), and the carrier (4) is supported and placed at the top end of the carrier plate (7); the welding tool (8) integrally consists of a lower welding plate, a plurality of rows of batteries vertically supported and inserted on the lower welding plate and an upper welding plate (801) at the top end of the batteries, a rectangular limit frame is welded at the middle position of the bottom plate of the carrier (4), and the lower welding plate of the welding tool (8) is in insertion fit with the rectangular limit frame; two carrier upper side plates (401) are fixedly locked on the front side and the rear side of the top plate of the carrier (4) through screws, and two carrier lower side plates (402) are fixedly locked on the front side and the rear side of the bottom plate of the carrier (4) through screws; Four butt-joint shafts (403) are symmetrically welded at the bottoms of the left end and the right end of the upper side plate (401) of the two carriers, four non-through positioning holes are symmetrically formed in the left end and the right end of the lower side plate (402) of the two carriers, and the four butt-joint shafts (403) are correspondingly in plug-in fit with the four positioning holes; the carrier plate (7) is of a rectangular structure, four corners of the top end of the carrier plate (7) are symmetrically locked and provided with four L-shaped limiting plates (702) through screws, and four corner parts of the bottom plate of the carrier (4) are correspondingly matched with the four L-shaped limiting plates (702) in an inserting manner; two positioning plates (406) are symmetrically welded at the bottoms of the two carrier upper side plates (401), two groups of mounting plates (405) are symmetrically welded at the top ends of the two carrier lower side plates (402), four groups of mounting plates (405) symmetrically penetrate through and slidably are provided with four six-edge inserting shafts (404) through spring pushing, and when the two carrier upper side plates (401) and the two carrier lower side plates (402) are spliced together in opposite insertion, the head end sections of the four six-edge inserting shafts (404) are matched with the four positioning plates (406) in penetrating and inserting mode; Two six-edge positioning shafts (703) are symmetrically welded between the four L-shaped limiting plates (702) in front-back direction, two vertical top plates (707) are symmetrically and slidably arranged on the left end section and the right end section of the two six-edge positioning shafts (703), and two triangular top blocks are welded on the top end sections of the two vertical top plates (707) in left-right opposite directions; two plum blossom-shaped knobs (704) are symmetrically arranged on the middle sections of the six-edge positioning shafts (703) in a front-back rotating mode, two connecting rods (708) are connected on the circumference outer rings of the knobs (704) in a left-right opposite rotating mode, and tail ends of the two connecting rods (708) are correspondingly connected with two vertical top plates (707) in a rotating mode; Two F-shaped support rods (705) are symmetrically and upwards welded on the middle sections of the two six-edge positioning shafts (703), two vertical inserting shafts (706) are installed on the horizontal parts of the two F-shaped support rods (705) in a penetrating and sliding mode, and the bottom sections of the two vertical inserting shafts (706) are correspondingly matched with positioning holes on the outer circumferences of the two knobs (704) in an inserting mode; four triangular stress blocks (407) are welded at the tail ends of the four hexagonal inserting shafts (404) through four L-shaped dowel bars, the four triangular stress blocks (407) are arranged left and right in opposite directions, and when the two carrier upper side plates (401) and the two carrier lower side plates (402) are spliced together in opposite insertion, the four triangular stress blocks (407) are correspondingly in abutting contact with inclined surfaces of the four triangular jacking blocks.

2. A cell module welding mechanism as recited in claim 1, wherein: two positioning seats (701) are symmetrically fixed at the outer eave positions of the left side and the right side of the carrier plate (7) through screws, and the whole positioning seat (701) is formed by welding two L-shaped positioning blocks which are symmetrical front and back and are provided with fixing holes at the top ends.

3. A welding line for use with a cell module welding mechanism as claimed in any one of claims 1 to 2, comprising: the lifting device comprises a frame (1), a carrier plate conveyer belt (5) and lifting cylinders (6), wherein two tables (101) are symmetrically welded at the top end of the frame (1) in a left-right mode, two machine boxes (2) are arranged at the left side and the right side of the front half portion of the frame (1), and positioning frames (3) with two rectangular structures are welded and supported at the top ends of the two tables (101) in a left-right mode at intervals; two carrier plate conveying belts (5) are symmetrically arranged on the top end part of the frame (1) in a left-right mode, and the two carrier plate conveying belts (5) are used for supporting and conveying carrier plates (7); two groups of lifting cylinders (6) are symmetrically hung at the bottoms of the two tables (101) in a left-right mode, carrier plate lifting shovels (601) with L-shaped structures are fixed at the top ends of telescopic rods of the lifting cylinders (6), and the two carrier plate lifting shovels (601) are matched with the carrier plates (7) in a clamping mode; four corners of the bottom of the positioning frame (3) are symmetrically fixed with four vertical supporting shafts (102), and the bottoms of the four vertical supporting shafts (102) are fastened with two bedplate (101) through screw locks; four positioning bolts (301) are symmetrically fixed at the bottoms of the left side and the right side of the positioning frame (3), and when the carrier plate (7) and the carrier (4) are lifted upwards to be in abutting contact with the positioning frame (3), the four positioning bolts (301) are correspondingly matched with four fixing holes at the top ends of the two positioning seats (701) in a plugging mode.

4. A method of welding a welding line using the cell module welding mechanism of claim 3, comprising the steps of:

① . Firstly, a first carrier (4) covers a lower welding plate, a battery and an upper welding plate (801), a welding tool (8) is wrapped in the lower welding plate, and a top plate of the carrier (4) and two carrier upper side plates (401) are inserted and covered on a bottom plate of the carrier (4) and two carrier lower side plates (402);

② . The carrier (4) is placed between the L-shaped limiting plates (702) on the carrier plate (7) for one-time positioning;

③ . The carrier plate conveying belt (5) is conveyed to the position below a first welding station, the first welding station is the bottom of a first positioning frame (3), a first group of lifting cylinders (6) drive two carrier plate lifting shovels (601) to scoop up a carrier plate (7), and in the scooping process, four positioning bolts (301) are in plug-in fit with four fixing holes at the top ends of two positioning seats (701) to perform secondary positioning;

④ . The positioned carrier (4) is subjected to a welding procedure, and the carrier conveying belt (5) can convey the second carrier (4) to pass through the first welding station due to the separation of the shoveled carrier plate (7) and the carrier conveying belt (5);

⑤ . The second carrier (4) is placed between four L-shaped limiting plates (702) of the second carrier plate (7) and is positioned once, the carrier plate conveying belt (5) is transmitted to the lower part of the second welding station, the second welding station is the bottom of the second positioning frame (3), the second carrier plate lifting shovel (601) is driven by the second group of lifting cylinders (6) to shovel the second carrier plate (7), and in the shoveling process, the four positioning bolts (301) are matched with four fixing holes at the top ends of the two positioning seats (701) in an inserting mode to perform secondary positioning, and the positioned carrier (4) is subjected to a welding procedure at the second welding station so as to reciprocate.