CN110165022B - Preparation equipment of solar cell metal wire film - Google Patents

Abstract

The invention discloses a preparation device of a solar cell metal wire film, which comprises a plurality of metal wires arranged in parallel and composite films sequentially staggered on two opposite sides of a plane formed by the metal wires in a hot-pressing mode, wherein the composite films comprise an upper composite film positioned on one side of the plane and a lower composite film positioned on the other side of the plane, and the metal wire film preparation device comprises a metal wire unreeling mechanism, a traction mechanism, an upper composite film hot-pressing mechanism for hot-pressing and bonding the upper composite film and the metal wires and a lower composite film hot-pressing mechanism for hot-pressing and bonding the lower composite film and the plurality of metal wires. The solar cell metal wire film preparation equipment is simple in structure, and the composite film and the multi-strand metal wires are bonded to form a continuous metal wire film through heating, so that the production process is simplified, the production efficiency is improved, meanwhile, the use of silver paste is reduced, the cost is greatly reduced, the transmittance of the composite film is enhanced, and the stability and the capacity of a photovoltaic cell can be improved.

Description

A preparation device for solar cell metal wire film

Technical Field

The invention relates to the technical field of battery production and manufacturing, and in particular to a preparation device for a solar cell metal wire film.

Background technique

In the field of solar photovoltaic equipment manufacturing at home and abroad, the prior art includes solar photovoltaic string welding machine equipment. During the manufacturing process of the electrode string, the electrode sheet main grid and the metal wire are welded by silver paste, and the alignment degree between the metal wire and the electrode sheet main grid is relatively high. The metal wire electrode sheet main grid connection is connected by several metal wires with rectangular cross-sections. The welding contact area is small and the welding performance is general. At the same time, the silver paste welding also has a great influence on the light transmittance performance.

Summary of the invention

The object of the present invention is to provide a preparation device for solar cell metal wire film in view of the problems in the prior art.

To achieve the above object, the technical solution adopted by the present invention is:

A preparation device for a solar cell metal wire film, the metal wire film comprising a plurality of metal wires arranged in parallel, and a composite film sequentially and staggeredly arranged on opposite sides of a plane formed by the metal wires by hot pressing, the composite film comprising an upper composite film located on one side of the plane and a lower composite film located on the other side of the plane, the metal wire film preparation device comprising:

A metal wire unwinding mechanism, used for unwinding the metal wire arranged on the material tray;

A traction mechanism, used for driving the multiple strands of the metal wires released by the metal wire unwinding mechanism to move;

An upper composite film hot pressing mechanism is disposed at the first station and is used for hot pressing and bonding the upper composite film to the plurality of strands of the metal wires;

The lower composite film hot pressing mechanism is arranged at the second work station and is used for hot pressing and bonding the lower composite film and the plurality of strands of the metal wires.

Preferably, the length of the first workstation is the same as the length of the second workstation, and the interval distance between the first workstation and the second workstation is an integer multiple of the length of the first workstation or the length of the second workstation.

Preferably, the metal wire unwinding mechanism comprises an unwinding roller and a control component for keeping the unwound metal wire in a tensioned state.

Preferably, the upper composite film hot pressing mechanism comprises an upper heating adsorption platform for heating and softening the upper composite film, an upper film thermal composite platform for bonding the upper composite film to the metal wire, and an upper driving device for moving the upper composite film from the upper heating adsorption platform to the upper film thermal composite platform, and the upper driving device can be arranged on the upper heating adsorption platform so as to be lifted up and down; the lower composite film hot pressing mechanism comprises a lower heating adsorption platform for driving the lower composite film to heat and soften, a lower film thermal composite platform for driving the lower composite film to bond to the metal wire, and a lower driving device for moving the lower composite film from the lower heating adsorption platform to the lower film thermal composite platform, and the lower driving device can be arranged on the lower heating adsorption platform so as to be lifted up and down.

Furthermore, a plurality of the upper composite films are arranged on the upper heating and adsorption platform at intervals along the length extension direction of the metal wire, and each of the upper driving devices drives one of the upper composite films to move, and a plurality of the lower composite films are arranged on the lower heating and adsorption platform at intervals along the length extension direction of the metal wire, and each of the lower driving devices drives one of the lower composite films to move.

In a specific embodiment, the distance between two adjacent upper composite films on the upper heating adsorption platform and the distance between two adjacent lower composite films on the lower heating adsorption platform are the same as the distance between two adjacent composite films on the metal wire film.

Preferably, the upper driving device includes the first driving device at the odd-numbered position and the second driving device at the even-numbered position, each of the first driving devices moves synchronously, each of the second driving devices moves synchronously, and the first driving device and the second driving device move asynchronously; the lower driving device includes the third driving device at the odd-numbered position and the fourth driving device at the even-numbered position, each of the third driving devices moves synchronously, each of the fourth driving devices moves synchronously, and the third driving device and the fourth driving device move asynchronously, and on the same length of the metal wire, after the first driving device drives the upper composite film at the odd-numbered position to move and bond with the metal wire, the fourth driving device drives the lower composite film at the even-numbered position to bond with the metal wire, or after the second driving device drives the upper composite film at the even-numbered position to move and bond with the metal wire, the third driving device drives the lower composite film at the odd-numbered position to bond with the metal wire.

Preferably, the composite film is formed by cutting a composite film roll, and the composite film roll includes an upper composite film roll and a lower composite film roll. The metal wire film preparation equipment also includes an upper composite film unwinding mechanism, a lower composite film unwinding mechanism and a cutting mechanism, and the cutting mechanism is respectively arranged at the first workstation position and the second workstation position.

Furthermore, the upper composite film hot pressing mechanism includes an upper heating and adsorption platform for driving the upper composite film to be heated and softened, and the upper composite film roll released by the upper composite film unwinding mechanism is fixedly set on the upper heating and adsorption platform, and the lower composite film hot pressing mechanism includes a lower heating and adsorption platform for driving the lower composite film to be heated and softened, and the lower composite film roll released by the lower composite film unwinding mechanism is fixedly set on the lower heating and adsorption platform.

Preferably, the metal wire film preparation equipment further comprises a wire film winding mechanism for winding the prepared metal wire film into a roll.

Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the preparation equipment of the solar cell metal wire film of the present invention has a simple structure, and the composite film is bonded to multiple strands of metal wires through heating to form a continuous metal wire film, which simplifies the production process and improves production efficiency. At the same time, the use of silver paste is eliminated, which greatly reduces the cost and enhances the transmittance of the composite film, thereby improving the stability and capacity of the photovoltaic cell.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a device for preparing a solar cell metal wire film according to the present invention;

Figure 2 is a partial enlarged view of point A in Figure 1;

Figure 3 is a partial enlarged view of point B in Figure 1;

FIG4 is a schematic structural diagram of the preparation process of the solar cell metal wire film of the present invention;

Accompanying drawing 5 is a top view of Fig. 4 .

Detailed ways

The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

The metal wire film includes a plurality of metal wires 100 arranged in parallel, and composite films arranged sequentially and staggered on opposite sides of a plane formed by the plurality of metal wires 100 by hot pressing, and an even number of composite films are provided. In this embodiment, the composite film is an electrically insulating optically transparent film. The composite film includes an upper composite film 200 located on one side of the plane and a lower composite film 300 located on the other side of the plane, and there is a spacing distance between adjacent upper composite films 200 and lower composite films 300. In this embodiment, the upper composite film 200 and the lower composite film 300 are the same.

As shown in FIGS. 1 to 5 , the preparation equipment of the solar cell metal wire film of the present invention comprises a metal wire unwinding mechanism 1 , an upper composite film hot pressing mechanism 2 , a lower composite film hot pressing mechanism 3 , a traction mechanism 4 and a wire film winding mechanism 5 .

The metal wire unwinding mechanism 1 is used to unwind the metal wire 100 set on the material tray. The metal wire unwinding mechanism 1 includes an unwinding roller 11 and a control component 12 for keeping the unwound metal wire 100 in a tensioned state.

The upper composite film hot pressing mechanism 2 is arranged at the first station position, and is used for hot pressing and bonding the upper composite film 200 and the plurality of metal wires 100. As shown in Fig. 1 and Fig. 2, the upper composite film hot pressing mechanism 2 comprises an upper heating adsorption platform 21 for heating and softening the upper composite film 200, an upper film hot composite platform 22 for bonding the upper composite film 200 and the metal wire 100, and an upper driving device for moving the upper composite film 200 from the upper heating adsorption platform 21 to the upper film hot composite platform 22, and the upper driving device is arranged on the upper heating adsorption platform 21 so as to be able to be lifted and lowered.

The lower composite film hot pressing mechanism 3 is arranged at the second station position, and is used for hot pressing and bonding the lower composite film 300 and the multiple strands of metal wires 100. As shown in FIG1 and FIG3, the lower composite film hot pressing mechanism 3 comprises a lower heating adsorption platform 31 for driving the lower composite film 300 to heat and soften, a lower film hot composite platform 32 for driving the lower composite film 300 to bond with the metal wires 100, and a lower driving device for moving the lower composite film 300 from the lower heating adsorption platform 31 to the lower film hot composite platform 32, and the lower driving device is arranged on the lower heating adsorption platform 31 so as to be able to be lifted and lowered.

The composite film is formed by cutting a composite film roll, and the composite film roll includes an upper composite film roll 400 and a lower composite film roll 500. The metal wire film preparation equipment also includes an upper composite film unwinding mechanism 6, a lower composite film unwinding mechanism 7 and a cutting mechanism 8, and the cutting mechanism 8 is respectively arranged at the first workstation position and the second workstation position.

The upper composite film roll 400 released by the upper composite film unwinding mechanism 6 is fixedly arranged on the upper heating adsorption platform 21, and then the upper composite film roll 400 on the upper heating adsorption platform 21 is cut into a plurality of upper composite films 200 by the cutting mechanism 8. The lower composite film roll 500 released by the lower composite film unwinding mechanism 7 is fixedly arranged on the lower heating adsorption platform 31, and then the lower composite film roll 500 on the lower heating adsorption platform 21 is cut into a plurality of lower composite films 300 by the cutting mechanism 8.

The cut upper composite films 200 are arranged on the upper heating adsorption platform 21 at intervals along the length extension direction of the metal wire 100, and each upper driving device drives one upper composite film 200 to move. The cut lower composite films 300 are arranged on the lower heating adsorption platform 32 at intervals along the length extension direction of the metal wire 100, and each lower driving device drives one lower composite film 300 to move.

In this embodiment, the distance between two adjacent upper composite films 200 on the upper heating adsorption platform 21 and the distance between two adjacent lower composite films 300 on the lower heating adsorption platform 31 are the same as the distance between two adjacent upper composite films 200 and lower composite films 300 on the metal wire film.

The upper driving device includes a first driving device 231 at an odd position and a second driving device 232 at an even position, each first driving device 231 operates synchronously, each second driving device 232 operates synchronously, and the first driving device 231 and the second driving device 232 operate asynchronously. The lower driving device includes a third driving device 331 at an odd position and a fourth driving device 332 at an even position, each third driving device 331 operates synchronously, each fourth driving device 332 operates synchronously, and the third driving device 331 and the fourth driving device 332 operate asynchronously. When a length of metal wire 100 is at the first station position, the first driving device 231 drives the upper composite film 200 at the odd position to move and bond with the metal wire 100, and then the metal wire moves backward to the second station position, and the fourth driving device 332 drives the lower composite film 300 at the even position to bond with the metal wire 100. Alternatively, when a length of metal wire 100 is at the first work position, the second drive device 232 drives the upper composite film 200 at the even position to move and bond with the metal wire 100, and then the section of metal wire moves backward to the second work position, and the third drive device 331 drives the lower composite film 300 at the odd position to bond with the metal wire 100.

In the above process, the multiple strands of metal wire 100 released by the metal wire unwinding mechanism 1 are driven to move by the traction mechanism 4. The traction mechanism 4 is located after the first station position and the second station position.

The length of the first station is the same as the length of the second station. Along the length extension direction of the metal wire 100, the interval between the first station and the second station is an integer multiple of the length of the first station or the length of the second station. In this embodiment, the interval between the first station and the second station is the length of the first station or the length of the second station. When a section of the metal wire 100 is at the first station position for hot-pressing bonding of the upper composite film 200, the traction mechanism 4 drives the multi-strand metal wire 100 to move two lengths of the first station or the length of the second station, and then the section of the metal wire 100 moves to the second station position for hot-pressing bonding of the lower composite film 300.

The wire film winding mechanism is used to tension and roll the prepared metal wire film into a roll for use in subsequent processes.

The process of preparing the metal wire film by the metal wire film preparation equipment is as follows:

(1) The metal wire 100 set on the material tray is unwound by the metal wire unwinding mechanism 1. When unwinding, the multiple strands of metal wire 100 are spread out by the unwinding roller 11, and the multiple strands of metal wire 100 after unwinding are kept at a certain tension by the control component 12. The multiple strands of metal wire 100 after unwinding are located in the same plane, and the distance between two adjacent metal wires 100 is the same. The multiple strands of metal wire 100 after unwinding are first located on the upper film thermal composite platform 22.

(2) The upper composite film roll 400 is unwound by the upper composite film unwinding mechanism 6. The unwound upper composite film roll 400 is fixed on the upper heating adsorption platform 21 by vacuum adsorption. Then, the upper composite film roll 400 is cut into a plurality of upper composite films 200 by the cutting mechanism 8. The upper heating adsorption platform 21 is heated to soften each upper composite film 200.

The lower composite film roll 500 is unwound by the lower composite film unwinding mechanism 7, and the unwound lower composite film roll 500 is fixed on the lower heating adsorption platform 31 by vacuum adsorption, and then the upper and lower composite film rolls 500 are cut into multiple lower and upper composite films 300 by the cutting mechanism 8, and the lower heating adsorption platform 31 is heated to soften each lower composite film 300.

The upper composite film 200 and the lower composite film 300 are respectively located on two sides of the plane where the multiple strands of metal wires 100 are located in step (1).

(3) Each first driving device 231 is actuated, so that the upper composite film 200 at the odd-numbered position moves and is bonded with the metal wire 100 on the upper film thermal composite platform 22;

After the multiple strands of metal wire 100 are driven to move backward by the length of the first station or the length of the second station by the traction mechanism 4, a length of metal wire is re-entered at the first station position, and each second driving device 232 is actuated, so that the upper composite film 200 at the even-numbered position is moved and bonded with the metal wire 100 on the upper film thermal composite platform 22;

After the traction mechanism 4 drives the multiple strands of metal wire 100 to move backward by the length of the first station or the length of the second station, a section of metal wire 100 originally at the first station is moved to the second station, and each fourth driving device 332 is actuated, so that the lower composite film 300 at the even-numbered position is moved and bonded with the metal wire 100 on the lower film thermal composite platform 32, that is, the lower composite film 300 is filled at the even-numbered position of a section of the metal wire 100 originally at the first station;

After the multiple strands of metal wire 100 are driven by the traction mechanism 4 to move backward by the length of the first station or the length of the second station, a length of metal wire 100 that re-enters at the first station position is moved to the second station position, and each third driving device 331 is actuated, thereby moving the lower composite film 300 at the odd position and bonding it with the metal wire 100 on the lower film thermal composite platform 32, that is, the lower composite film 300 is filled in the odd position of the newly entered section of the metal wire 100 at the first station position.

After the traction mechanism 4 drives the multi-strand metal wire 100 to move backward twice by the length of the first station or the length of the second station, a length of metal wire 100 re-enters at the first station position, and in the process that the fourth driving device 332 drives the lower composite film 300 at the even position to bond with the initial length of metal wire 100, at the first station position, the first driving device 231 drives the upper composite film 200 at the odd position to move and bond with the re-entering length of metal wire 100... In this way, the traction mechanism 4 continuously pulls the metal wire 100 to move, gradually realizes the hot pressing bonding of the upper composite film 200 and the lower composite film 300 with the metal wire 100, and completes the preparation of the metal wire film.

In the above process, the second driving device 232 may be activated first, so that the upper composite film 200 at the even position is moved and bonded with the metal wire 100 on the upper film thermal composite platform 22 ..., and the specific process is referred to above.

(4) The prepared metal wire film is tightened by the wire film winding mechanism 5 and rolled into a metal wire film tape for use in subsequent processes.

The prepared metal wire film includes a middle metal wire film and a head and tail metal wire film, the spacing distance between the adjacent upper composite film 200 and the lower composite film 300 of the middle metal wire film is 2-10 mm, and the spacing distance between the adjacent upper composite film 200 and the lower composite film 300 of the head and tail metal wire film is 40-100 mm. To facilitate the process manufacturing, the middle metal wire film and the head and tail metal wire films are independently manufactured and rolled up.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The preparation equipment of solar cell metal wire film is characterized in that: the metal wire membrane includes the stranded metal wire of parallel arrangement, through hot pressing mode order crisscross the setting in the even number complex film of the relative both sides of plane that the metal wire formed, the complex film is including being located the last complex film of one side of plane and being located the lower complex film of the opposite side of plane, metal wire membrane preparation equipment includes:

The metal wire unreeling mechanism is used for unreeling the metal wires arranged on the material tray;

The traction mechanism is used for driving the multiple strands of metal wires released by the metal wire unreeling mechanism to move;

the upper composite film hot-pressing mechanism is arranged at the first station position and is used for hot-pressing and bonding the upper composite film and a plurality of strands of metal wires;

The lower composite film hot-pressing mechanism is arranged at the second station position and is used for hot-pressing and bonding the lower composite film and a plurality of strands of metal wires;

The first station and the second station are sequentially arranged along the length extending direction of the metal wire, and a plurality of upper composite films and a plurality of lower composite films are respectively arranged on the metal wire with one length;

The upper composite films and a plurality of strands of metal wires are bonded in a hot pressing mode through the upper composite film hot pressing mechanism at the first station position, the upper composite films at odd positions synchronously move to be bonded with a plurality of strands of metal wires in the hot pressing mode, the upper composite films at even positions synchronously move to be bonded with a plurality of strands of metal wires, and the upper composite films at odd positions and the upper composite films at even positions do not synchronously move;

And then the metal wires move along the length extending direction of the metal wires so that the metal wires with the upper composite films are moved to the second station position, the lower composite films are bonded with the metal wires in a hot pressing mode through the lower composite film hot pressing mechanism at the second station position, the lower composite films at odd positions synchronously move to bond with the metal wires, the lower composite films at even positions synchronously move to bond with the metal wires, and the lower composite films at odd positions and the lower composite films at even positions do not synchronously move.

2. The manufacturing apparatus of a solar cell wire film according to claim 1, wherein: the length of the first station is the same as that of the second station, and the interval distance between the first station and the second station is an integral multiple of the length of the first station or the length of the second station.

3. The manufacturing apparatus of a solar cell wire film according to claim 1, wherein: the wire unreeling mechanism comprises an unreeling roller and a control part for keeping the unreeled wire in a tensioning state.

4. The manufacturing apparatus of a solar cell wire film according to claim 1, wherein: the upper composite film hot pressing mechanism comprises an upper heating adsorption platform for heating and softening the upper composite film, an upper film hot compounding platform for bonding the upper composite film and the metal wire, and an upper driving device for moving the upper composite film from the upper heating adsorption platform to the upper film hot compounding platform, wherein the upper driving device can be arranged on the upper heating adsorption platform in an up-and-down lifting manner; the lower composite film hot pressing mechanism comprises a lower heating adsorption platform for driving the lower composite film to be heated and softened, a lower film hot compounding platform for driving the lower composite film to be bonded with the metal wire, and a lower driving device for moving the lower composite film from the lower heating adsorption platform to the lower film hot compounding platform, wherein the lower driving device can be arranged on the lower heating adsorption platform in an up-down lifting manner.

5. The manufacturing apparatus of a solar cell wire film according to claim 4, wherein: the upper composite films are arranged on the upper heating adsorption platform at intervals along the length extension direction of the metal wire, each upper driving device drives one upper composite film to move, the lower composite films are arranged on the lower heating adsorption platform at intervals along the length extension direction of the metal wire, and each lower driving device drives one lower composite film to move.

6. The manufacturing apparatus of a solar cell wire film according to claim 5, wherein: the distance between two adjacent upper composite films on the upper heating adsorption platform and the distance between two adjacent lower composite films on the lower heating adsorption platform are the same as the distance between two adjacent composite films on the metal wire film.

7. The manufacturing apparatus of a solar cell wire film according to claim 6, wherein: the upper driving device comprises first driving devices at odd positions and second driving devices at even positions, the first driving devices synchronously act, the second driving devices synchronously act, and the actions of the first driving devices and the second driving devices are not synchronous; the lower driving device comprises a third driving device at an odd number position and a fourth driving device at an even number position, the third driving devices synchronously act, the fourth driving devices synchronously act, the actions of the third driving device and the fourth driving device are not synchronous, on the metal wire with the same length, after the first driving device drives the upper composite film at the odd number position to move and bond with the metal wire, the fourth driving device drives the lower composite film at the even number position to bond with the metal wire, or after the second driving device drives the upper composite film at the even number position to move and bond with the metal wire, the third driving device drives the lower composite film at the odd number position to bond with the metal wire.

8. The manufacturing apparatus of a solar cell wire film according to claim 1, wherein: the composite film is formed by cutting a composite film winding tape, the composite film winding tape comprises an upper composite film winding tape and a lower composite film winding tape, the metal wire film preparation equipment further comprises an upper composite film unreeling mechanism, a lower composite film unreeling mechanism and a cutting mechanism, and the cutting mechanism is respectively arranged at the first station position and the second station position.

9. The manufacturing apparatus of a solar cell wire film according to claim 8, wherein: the upper composite film hot-pressing mechanism comprises an upper heating adsorption platform for driving the upper composite film to be heated and softened, the upper composite film winding belt discharged by the upper composite film unreeling mechanism is fixedly arranged on the upper heating adsorption platform, the lower composite film hot-pressing mechanism comprises a lower heating adsorption platform for driving the lower composite film to be heated and softened, and the lower composite film winding belt discharged by the lower composite film unreeling mechanism is fixedly arranged on the lower heating adsorption platform.

10. The manufacturing apparatus of a solar cell wire film according to claim 1, wherein: the metal wire film preparation device further comprises a wire film winding mechanism for winding the prepared metal wire film into a roll.