CN110449894B

CN110449894B - Bus bar synchronous stamping upwarping-bonding surface pressure welding device and upwarping pressure welding method thereof

Info

Publication number: CN110449894B
Application number: CN201910665831.3A
Authority: CN
Inventors: 徐芳华; 郑栋; 张国良; 李奎; 雷智渊
Original assignee: Hangzhou Confirmware Technology Co ltd
Current assignee: Hangzhou Confirmware Technology Co ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-09-08
Anticipated expiration: 2039-07-23
Also published as: CN110449894A

Abstract

The invention discloses a bus bar synchronous stamping upwarping-bonding surface pressure welding device and an upwarping pressure welding method thereof. The existing L-shaped upwarping bus bar manufacturing device is low in efficiency and unstable in forming, or the binding surface is easy to be subjected to insufficient soldering. The invention relates to a bus bar synchronous stamping upwarping-binding surface pressure welding device which comprises a fixed seat and an upwarping pressure welding mechanism. The upwarp pressure welding mechanism comprises a mounting seat, a first pressure welding head, a second pressure welding head, a profiling and a driving piece. The second pressure welding head is fixed on the mounting seat. The profiling is arranged on the mounting seat. The connection relation of the mounting seat, the first pressure welding head and the fixing seat adopts one of the following two schemes. 1) The first pressure welding head is fixed with the fixed seat. The mounting seat is driven by a driving piece. The first pressure welding head is opposite to the outer side face of the second pressure welding head. 2) The mounting seat is fixed with the fixing seat. The first bonding tool is driven by a driving member. The first pressure welding head is opposite to the outer side face of the second pressure welding head. The profiling position of the invention is adjustable.

Description

Bus bar synchronous stamping upwarping-bonding surface pressure welding device and upwarping pressure welding method thereof

Technical Field

The invention belongs to the technical field of solar photovoltaic module bus bar production, and particularly relates to a bus bar synchronous stamping upwarping-bonding surface pressure welding device and an upwarping pressure welding method thereof.

Background

In the manufacturing process of the solar photovoltaic cell module, the cell strings need to be subjected to confluence welding so as to lead photovoltaic current to an external junction box. As shown in fig. 1, the L-shaped bus bar 1 is rectangular, one side of the L-shaped bus bar is used for welding the batteries 2 in series, and the other side of the L-shaped bus bar is folded to form an upward-tilted shape, so that the end of the L-shaped bus bar extends into the junction box B (shown in fig. 2) beyond the substrate surface of the assembly. The existing L-shaped welding strips are manufactured in different methods, and two welding strips are manually welded into a right-angle shape and then bent into an upturned shape; or bending the straight strip-shaped welding strip into a right-angle shape, and then welding the binding surfaces A together by electric iron and other modes. Although the methods can meet the final use requirements, the methods are not efficient, the forming is not stable, or the binding surface is easy to be subjected to insufficient welding, the required pulling strength cannot be achieved, and the like. These methods are not suitable for industrial automation mass production, so that an efficient manufacturing method more suitable for industrial production is needed.

Disclosure of Invention

The invention aims to provide a bus bar synchronous stamping upwarping-bonding surface pressure welding device and an upwarping pressure welding method thereof.

The invention relates to a bus bar synchronous stamping upwarping-binding surface pressure welding device which comprises a fixed seat and an upwarping pressure welding mechanism. The upwarp pressure welding mechanism comprises a mounting seat, a first pressure welding head, a second pressure welding head, a profiling and a driving piece. The second pressure welding head is fixed on the mounting seat. The mounting seat is provided with a sliding groove. The bottom of the chute is provided with a threaded hole. The convex block at the bottom of the profiling and the sliding groove on the mounting seat form a sliding pair. The profiling is provided with a waist-shaped stepped hole. Fastening bolts are arranged in the waist-shaped stepped holes. The screw rod of the fastening bolt and the threaded hole on the chute form a screw pair. The length direction of the sliding groove is parallel to the arrangement direction of the profiling and the second pressure welding heads. The plane of the outer side face of the profiling is located between the first pressure welding head and the second pressure welding head. And an arc chamfer is arranged at the top of the side, close to the second pressure welding head, of the explorator.

The connection relation of the mounting seat, the first pressure welding head and the fixing seat adopts one of the following two schemes.

1) The first pressure welding head is fixed with the fixed seat. The mounting seat is driven by a driving piece. The first pressure welding head is opposite to the outer side face of the second pressure welding head.

2) The mounting seat is fixed with the fixing seat. The first bonding tool is driven by a driving member. The first pressure welding head is opposite to the outer side face of the second pressure welding head.

Furthermore, the bus bar synchronous stamping upwarping-binding surface pressure welding device further comprises a first electrode block and a second electrode block. The first electrode block is electrically connected with the first pressure welding head. The second electrode block is electrically connected with the second pressure welding head. The first electrode block is connected with one terminal of a pressure welding power supply through a cable and a first foot switch; the first electrode block is connected with the other terminal of the bonding power supply through a cable. The two cylinders are connected with the same reversing valve. And a control interface of the reversing valve is connected with a reversing valve driving power supply through a second foot switch.

Furthermore, the two upturned pressure welding mechanisms are arranged. The two upwarp pressure welding mechanisms are arranged side by side.

Furthermore, the fixing seat is U-shaped.

Further, the driving piece adopts a cylinder.

The upwarping pressure welding method of the bus bar synchronous stamping upwarping-joint surface pressure welding device comprises the following specific steps:

step one, adjusting the distance l between the explorator and the second pressure welding head to ensure that

H is the surface distance between the outer side surface of the profiling and the outer side surface of the second pressure welding head; theta is the upwarp angle.

And step two, placing the bent part of the bus bar bent into an L shape between the first pressure welding head and the second pressure welding head, and aligning the right-angle edge to be bent on the bus bar with the profiling.

And step three, the driving piece moves forward, so that the first pressure welding head and the second pressure welding head clamp the bent part of the bus bar, and the right-angle edge aligned with the profiling mold is bent under the extrusion of the profiling mold. And the first pressure welding head and the second pressure welding head are heated to weld the binding surfaces at the bent parts of the bus bars together.

The invention has the beneficial effects that:

1. according to the invention, the profiling, the first bonding tool and the second bonding tool are matched, so that the bending part of the bus bar can be subjected to resistance welding, and meanwhile, the right-angle side of the bus bar is upwarped.

2. The profiling position of the bus bar processing device is adjustable, so that the upwarping angle of the bus bar processed by the profiling position processing device is adjustable.

3. According to the invention, two symmetrical L-shaped bus bars can be synchronously processed by arranging the two upwarping pressure welding mechanisms side by side. Two mutually symmetrical L-shaped bus bars are directly applied to a solar battery pack; therefore, the invention can greatly improve the processing efficiency of the L-shaped bus bar.

Drawings

FIG. 1 is a schematic structural view of an L-shaped bus bar strip processed according to the present invention;

FIG. 2 is a schematic view of an L-shaped bus bar welding strip of the present invention applied to a series of cells;

fig. 3 is a schematic structural view of a bus bar synchronous punching upwarping-attaching surface pressure welding device in embodiment 1;

fig. 4 is a schematic working diagram of the bus bar synchronous punching upwarping-attaching surface pressure welding device in embodiment 1.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the present invention focuses on the welding ribbon upwarp angle θ and the fusion welding of the faying surface a.

As shown in fig. 2, one straight edge of the L-shaped bus bar 1 is welded with the battery string, and the other straight edge extends into the junction box B.

Example 1:

as shown in fig. 3, the bus bar synchronous stamping upwarping-binding surface pressure welding device includes a fixing seat 9, a first electrode block 5, a second electrode block 6 and an upwarping pressure welding mechanism. The fixing seat 9 is U-shaped. The upwarp pressure welding mechanism comprises a mounting seat 11, a first pressure welding head 3, a second pressure welding head 4, a profiling 7 and a driving piece. The inner side (i.e., the top) of the first bonding tool 3 is fixed to the holder 9 by an intermediate block 12. The driving member employs a cylinder 8. The cylinder 8 is fixed on the fixing seat 9, and the piston rod faces the first pressure welding head 3. The piston rod of the cylinder 8 is fixed with the mounting seat 11. The second bonding tool 4 is fixed to the mount 11. The second bonding tool 4 is arranged opposite to the outer side surface of the first bonding tool 3.

The mounting seat 11 is provided with a chute. The bottom of the chute is provided with a threaded hole. The convex block at the bottom of the profiling 7 and the sliding groove on the mounting seat 11 form a sliding pair. The profiling 7 is provided with a waist-shaped stepped hole. Fastening bolts are arranged in the waist-shaped stepped holes. The screw rod of the fastening bolt and the threaded hole on the chute form a screw pair. When the fastening bolt is tightened, the profile 7 presses the chute, so that the profile 7 is fixed on the mounting 11. When the fastening bolt is unscrewed, the explorator 7 can slide on the mounting seat 11 (the fastening bolt and the waist-shaped stepped hole generate displacement relatively), so that the fixing of the explorator on any position of the sliding chute is realized. The outer side of the profile 7 is higher than the outer side of the second bonding tool 4. And the top of the profiling 7 close to the side of the second pressure welding head 4 is provided with an arc chamfer. The length direction of the sliding groove is parallel to the arrangement direction of the explorator 7 and the second pressure welding head 4.

The number of the upwarp pressure welding mechanisms is two. The two upwarp pressure welding mechanisms are arranged side by side. The first electrode block 5 is fixed to the intermediate block 12. The two second electrode blocks 6 are respectively fixed with the mounting seats 11 in the two upwarping pressure welding mechanisms. The first electrode block 5, the middle block 12, the second electrode block 6 and the mounting seat 11 are made of conductive materials, and the resistivity of the first electrode block, the resistivity of the middle block, the resistivity of the second electrode block and the resistivity of the mounting seat are all lower than the resistivity of the first bonding tool 3 and the resistivity of the second bonding tool 4. Therefore, a larger current flows through the first bonding tool 3 and the second bonding tool 4 to generate heat, and the effect of resistance welding is achieved.

The first electrode block 5 is connected with one terminal (positive pole) of a pressure welding power supply through a cable 10 and a first foot switch; the first electrode block 5 is connected to the other terminal (positive electrode) of the bonding power source through a cable 10. Two cylinders 8 are connected with the same reversing valve to realize synchronous control. And a control interface of the reversing valve is connected with a reversing valve driving power supply through a second foot switch.

step one, adjusting the distance l between the explorator 7 and the second pressure welding head 4 to ensure that

Wherein h is the surface distance (i.e. height difference) between the outer side surface of the profiling 7 and the outer side surface of the second bonding tool 4; theta is an upwarping angle meeting the design requirement. It can be seen that the upwarping angle of the bus bar can be changed by adjusting the position of the adjustment profile 7.

And step two, placing the bent part of the bus bar bent into an L shape between the first pressure welding head 3 and the second pressure welding head 4, and aligning and contacting a right-angle edge to be bent on the bus bar with the profiling 7. Because the two upwarping pressure welding mechanisms are arranged, the two bus bars are respectively placed at the two upwarping pressure welding mechanisms.

Step three, as shown in fig. 4, the two foot switches are stepped on, the two air cylinders are synchronously pushed out, so that the mounting base 11 moves towards the corresponding first electrode block 5, the bent part of the bus bar is clamped by the first welding pressing head 3 and the second welding pressing head 4, and the right-angle edge aligned with the profiling 7 bends and upwarps under the extrusion of the profiling 7. The voltage output by the pressure welding power supply forms a closed loop through the first electrode block 5, the middle block 12, the first pressure welding head 3, the bus bar, the second pressure welding head 4, the second electrode block 6 and the mounting seat 11; the first pressure welding head 3 and the second pressure welding head 4 generate heat to weld the binding surfaces at the bent parts of the bus bars together.

And step four, the two cylinders retract synchronously, and the bus bar which is subjected to upwarping pressure welding is taken down manually or through a discharging device.

Example 2

A bus bar synchronous stamping upwarping-binding surface pressure welding device comprises a fixed seat, a first electrode block, a second electrode block and an upwarping pressure welding mechanism. The fixing seat is U-shaped. The upwarp pressure welding mechanism comprises a mounting seat, a first pressure welding head, a second pressure welding head, a profiling and a driving piece.

The mount pad is fixed on the fixing base. The second pressure welding head is fixed on the mounting seat. The mounting seat is provided with a chute. The bottom of the chute is provided with a threaded hole. The convex block at the bottom of the profiling and the sliding groove on the mounting seat form a sliding pair. The profiling is provided with a waist-shaped stepped hole. Fastening bolts are arranged in the waist-shaped stepped holes. The screw rod of the fastening bolt and the threaded hole on the chute form a screw pair. The outer side surface of the profiling is higher than the outer side surface of the second bonding tool. And the top of the side of the explorator close to the second pressure welding head is provided with an arc chamfer. The length direction of the sliding groove is parallel to the arrangement direction of the profiling and the second pressure welding heads.

The driving part adopts a cylinder. The cylinder is fixed on the fixing seat, and the piston rod faces the second pressure welding head. And a piston rod of the cylinder is fixed with the inner side surface (namely the top surface) of the first pressure welding head through the middle block. The second pressure welding head is arranged opposite to the outer side face of the first pressure welding head.

The number of the upwarp pressure welding mechanisms is two. The two upwarp pressure welding mechanisms are arranged side by side. The first electrode block is fixed with the middle block. The two second electrode blocks are respectively fixed with the mounting seats in the two upwarping pressure welding mechanisms. The first electrode block, the middle block, the second electrode block and the mounting seat are all made of conductive materials, and the resistivity of the first electrode block, the resistivity of the middle block, the resistivity of the second electrode block and the resistivity of the mounting seat are all lower than the resistivity of the first pressure welding head and the resistivity of the second pressure welding head. Therefore, larger current flows through the first pressure welding head and the second pressure welding head to generate heat, and the effect of resistance welding is achieved.

The first electrode block is connected with one terminal (positive pole) of a power supply through a cable; the first electrode block is connected to the other terminal (positive electrode) of the power supply via a cable.

Wherein h is the surface distance (namely height difference) between the outer side surface of the profiling and the outer side surface of the second pressure welding head; theta is an upwarping angle meeting the design requirement.

And step two, placing the bent part of the bus bar bent into an L shape between the first pressure welding head and the second pressure welding head, and enabling the right-angle side to be bent on the bus bar to be aligned and contacted with the profiling. Because the two upwarping pressure welding mechanisms are arranged, the two bus bars are respectively placed at the two upwarping pressure welding mechanisms.

And step three, treading the two foot switches, and synchronously pushing out the two air cylinders to enable the mounting base 11 to move towards the corresponding first electrode block 5, wherein the bent part of the bus bar is clamped by the first welding pressing head 3 and the second welding pressing head 4, and the right-angle edge aligned with the profiling 7 bends and upwarps under the extrusion of the profiling 7. The voltage output by the pressure welding power supply forms a closed loop through the first electrode block 5, the middle block 12, the first pressure welding head 3, the bus bar, the second pressure welding head 4, the second electrode block 6 and the mounting seat 11; the first pressure welding head 3 and the second pressure welding head 4 generate heat to weld the binding surfaces at the bent parts of the bus bars together.

Claims

1. The bus bar synchronous stamping upwarping-binding surface pressure welding device comprises a fixed seat and an upwarping pressure welding mechanism; the method is characterized in that: the upwarp pressure welding mechanism comprises a mounting seat, a first pressure welding head, a second pressure welding head, a profiling and a driving piece; the second pressure welding head is fixed on the mounting seat; the mounting seat is provided with a sliding groove; the bottom of the sliding chute is provided with a threaded hole; the convex block at the bottom of the profiling mold and the chute on the mounting seat form a sliding pair; a waist-shaped stepped hole is formed on the profiling; a fastening bolt is arranged in the waist-shaped stepped hole; the screw rod of the fastening bolt and the threaded hole on the chute form a screw pair; the length direction of the sliding groove is parallel to the arrangement direction of the profiling and the second pressure welding head; the plane of the outer side surface of the profiling is positioned between the first pressure welding head and the second pressure welding head; the top of the profiling close to the second pressure welding head is provided with an arc chamfer;

the connection relation of the mounting seat, the first pressure welding head and the fixing seat adopts one of the following two schemes;

1) the first pressure welding head is fixed with the fixed seat; the mounting seat is driven by a driving piece; the outer side surfaces of the first pressure welding head and the second pressure welding head are arranged oppositely;

2) the mounting seat is fixed with the fixed seat; the first pressure welding head is driven by a driving piece; the first pressure welding head is opposite to the outer side face of the second pressure welding head.

2. The synchronous stamping upwarping-joint surface pressure welding device of the bus bar according to claim 1, characterized in that: the number of the upturned pressure welding mechanisms is two; the two upwarp pressure welding mechanisms are arranged side by side.

3. The synchronous stamping upwarping-joint surface pressure welding device of the bus bar according to claim 1, characterized in that: the fixing seat is U-shaped.

4. The synchronous stamping upwarping-joint surface pressure welding device of the bus bar according to claim 1, characterized in that: the driving piece adopts a cylinder.

5. The upturned pressure welding method of the bus bar synchronous stamping upturned-attached surface pressure welding device according to claim 1, characterized in that: step one, adjusting the distance l between the explorator and the second pressure welding head to ensure that

H is the surface distance between the outer side surface of the profiling and the outer side surface of the second pressure welding head; theta is an upwarping angle;

placing the bent part of the bus bar bent into an L shape between a first pressure welding head and a second pressure welding head, and aligning a right-angle side to be bent on the bus bar with the profiling;

step three, the driving piece moves forward, so that the first pressure welding head and the second pressure welding head clamp the bent part of the bus bar, and the right-angle edge aligned with the profiling mold is bent under the extrusion of the profiling mold; and the first pressure welding head and the second pressure welding head are heated to weld the binding surfaces at the bent parts of the bus bars together.