Patent Description:
In the production of an emerging solar cell string, the N-th cell is stacked on the second half of the N-th solder ribbon group; the first half of the (N+<NUM>)-th solder ribbon group is stacked on the N-th cell; the (N+<NUM>)-th cell is stacked on the second half of the (N+<NUM>)-th solder ribbon group; and the solder ribbon groups on the front and back sides of each cell are fixed to the cell using films. The solder ribbon group includes multiple solder ribbons, and the number of solder ribbons is the same as the number of grid lines to be connected on the cell. N is a positive integer.

When producing such solar cell strings, the back film and the front film are alternately transported to the working platform along different paths using two conveyor lines, rendering the production equipment structurally complicated.

There is known [<CIT>] a solar battery string production line comprising a back film laying device with a belt-shaped back film on the conveying device, a welding strip set providing device used for placing the welding strip group on the conveying device and stacking the welding strip group on a back surface film of the conveying device; a battery piece providing device, a conveying device and a hot-pressing device; the battery piece providing device places battery pieces on the conveying device; the ith battery piece is stacked on the back half section of the ith welding strip group, the front half section of the (i + <NUM>)th welding strip group is stacked on the ith battery piece; and the hot-pressing device is used for hot-pressing the battery string stacked on the conveying device. The battery string at least comprises the back surface film, the welding band group and the battery piece stacked on the conveying device.

In view of the deficiencies in the prior art, this application provides a production equipment according to claim <NUM> and a method for producing a solar cell string according to claim <NUM>.

In a first aspect, this application provides an equipment for producing a solar cell string, including:.

In an embodiment, the transfer device includes a first gripping device; the first gripping device is provided between the input end of the first horizontal section and the output end of the second horizontal section; and the first gripping device is configured for gripping the pressing tool from the output end of the second horizontal section and stacking the pressing tool on the front film.

In an embodiment, the transfer device includes a second gripping device, a third continuous conveyor belt, and a third gripping device; the second gripping device is located above the output end of the second horizontal section; the third continuous conveyor belt is located above a middle of the second horizontal section; the third gripping device is located between the first continuous conveyor belt and the third continuous conveyor belt; a conveying direction of the third continuous conveyor belt is opposite to a conveying direction of the second horizontal section; the second gripping device is configured for gripping the pressing tool from the output end of the second horizontal section and placing the pressing tool at an input end of the third continuous conveyor belt; the third gripping device is located on a side of an output end of the third continuous conveyor belt, and located close to the second carrying device; and the third gripping device is configured for gripping the pressing tool from the output end of the third continuous conveyor belt, and optionally placing the pressing tool on the front film.

In an embodiment, the transfer device further includes a buffering mechanism and a carrying mechanism;.

In an embodiment, the part of the manipulator facing the first continuous conveyor belt is the first suction part.

In an embodiment, a width of the third continuous conveyor belt is less than a length of the pressing tool; lifting plates are provided symmetrically on both sides of the third continuous conveyor belt; the lifting plates are capable of moving up and down; in a first state, an upper surface of the lifting plates is lower than an upper surface of the third continuous conveyor belt; in a second state, the upper surface of the lifting plates is higher than the upper surface of the third continuous conveyor belt; and a projection of each of the lifting plates does not coincide with a projection of the third gripping device.

In an embodiment, the first conveying device further includes a heating device; and the heating device is located at a middle of the second horizontal section.

In an embodiment, the second carrying device includes a first gripping mechanism and a second gripping mechanism;.

This application further provides a method for producing a solar cell string using the equipment, including:.

In an embodiment, the step (S4) further includes:
stacking the pressing tool on the front film on the first continuous conveyor belt.

In an embodiment, in step (S1), at least first three films provided by the film-supplying device are used as back films; and remaining films are alternately used as the front film and the back film.

In an embodiment, in step (S5), the transfer device includes a first gripping device; and the pressing tool is gripped by the first gripping device and stacked on the second front film at the input end of the first horizontal section.

In an embodiment, in step (S5), the transfer device includes a second gripping device, a third continuous conveyor belt, and a third gripping device; the second gripping device is configured to grip and place the pressing tool at an input end of the third continuous conveyor belt; the pressing tool is conveyed to an output end of the third continuous conveyor belt; and the third gripping device is configured to grip and stack the pressing tool on the second front film near the output end of the first horizontal section.

In an embodiment, in step (S5), the transfer device further includes a buffering mechanism and a carrying mechanism;.

In this application, the solar cell string production equipment includes a first conveying device, a second conveying device, a first carrying device, a transfer device and a second carrying device. The first conveying device has a first continuous conveyor belt, the second conveying device has a second continuous conveyor belt, and the first continuous conveyor belt and the second continuous conveyor belt can turn and convey in the vertical direction. The first conveyor device is provided with a back film and a front film. The first conveyor device can transport the back film located on the first side section of the first continuous conveyor belt to the second side section of the second continuous conveyor belt. The transfer device can transport the pressing tool at the output end of the second horizontal section of the second continuous conveyor belt to the front film at the first horizontal section of the first continuous conveyor belt. The second handling device can transport the stacked pressing tool and the front film to the second horizontal section of the second continuous conveyor belt. The back and front films are conveyed by the first continuous conveyor belt, and the solar cell string is produced on the second continuous conveyor belt, simplifying the structure of the solar cell string production equipment. Moreover, the pressing tool can be repeatedly used, and the structure of the production equipment is optimized.

The solar cell string production method provided herein can achieve the continuous production of solar cell strings, allowing for improved production efficiency.

In order to illustrate the technical solutions of the embodiments of the present disclosure or in the prior art more clearly, the drawings required in the description of the embodiments of the disclosure or the prior art will be briefly described below. Obviously, presented in the drawings are merely some embodiments of the present disclosure, which are not intended to limit the disclosure. For those skilled in the art, other drawings may also be obtained according to the drawings provided herein without paying creative efforts.

In the figures: <NUM>-first continuous conveyor belt; <NUM>-second continuous conveyor belt; <NUM>-first carrying device; <NUM>-transfer device; <NUM>-first gripping device; <NUM>-second gripping device; <NUM>-third continuous conveyor belt; <NUM>-third gripping device; <NUM>-limit plate; <NUM>-lifting plate; <NUM>-buffering mechanism; <NUM>-synchronous belt; <NUM>-baffle; <NUM>-carrying mechanism; <NUM>-power unit; <NUM>-manipulator; <NUM>-first suction part; <NUM>-second carrying device; <NUM>-connecting plate; <NUM>-first suction plate; <NUM>-second suction plate; <NUM>-slide cylinder; <NUM>-first suction cup; <NUM>-second suction cup; <NUM>-third suction cup; <NUM>-first gripping mechanism; <NUM>-first gripper; <NUM>-fourth suction cup; <NUM>-second gripper; <NUM>-second gripping mechanism; <NUM>-film-supplying device; <NUM>-first feeding device; <NUM>-second feeding device; <NUM>-heating device; <NUM>-back film; <NUM>-front film; <NUM>-pressing tool; <NUM>-solar cell; and <NUM>-solder ribbon.

The technical solutions of the disclosure will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, described below are merely some embodiments of the disclosure, which are not intended to limit the disclosure. For those skilled in the art, other embodiments obtained based on these embodiments without paying creative efforts should fall within the scope of the disclosure defined by the appended claims.

In order to allow those skilled in the art to better understand the technical solutions of the disclosure, the disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to <FIG>, a solar cell string production equipment is provided, which includes a rack, and a first conveying device, a second conveying device, a first carrying device <NUM>, a transfer device <NUM>, and a second carrying device <NUM> disposed on the rack.

The first conveying device includes a first continuous conveyor belt <NUM> having a first horizontal section and a first side section. A conveying direction of the first continuous conveyor belt <NUM> is from the first horizontal section to the first side section. The second conveying device includes a second continuous conveyor belt <NUM> having a second horizontal section and a second side section. The second continuous conveyor belt <NUM> and the first continuous conveyor belt <NUM> are arranged in parallel. A conveying direction of the second continuous conveyor belt <NUM> is from the second side section to the second horizontal section. The angle between the first side section of the first continuous conveyor belt <NUM> and the first horizontal section of the first continuous conveyor belt <NUM> is the same as the angle between the second side section of the second continuous conveyor belt <NUM> and the second horizontal section of the second continuous conveyor belt <NUM>. The first side section of the first continuous conveyor belt <NUM> and the second side section of the second continuous conveyor belt <NUM> are located on the same side with respect to the first horizontal section of the first continuous conveyor belt <NUM> and the second horizontal section of the second continuous conveyor belt <NUM>. The first continuous conveyor belt <NUM> and the second continuous conveyor belt <NUM> are wound on a drive shaft distributed at a right angle or an obtuse angle to make a turn in the vertical direction. Further, the first continuous conveyor belt <NUM> and the second continuous conveyor belt <NUM> are each provided with suction holes that can hold the back film <NUM> and the front film <NUM>, thereby remaining stable during the conveying process. Specifically, the first continuous conveyor belt <NUM> and the second continuous conveyor belt <NUM> form a sealed cavity inside, and a negative pressure is formed in the sealed cavity, so that the back film <NUM> and the front film <NUM> can be held on the first continuous conveyor belt <NUM> and the second continuous conveyor belt <NUM>.

The first carrying device <NUM> is disposed in front of the first side section of the first continuous conveyor belt <NUM> and the second side section of the second continuous conveyor belt <NUM>, for carrying the back film <NUM> from the first side section of the first continuous conveyor belt <NUM> to the second side section of the second continuous conveyor belt <NUM>. The first carrying device <NUM> includes a drive device and a suction member capable of holding the back film <NUM>. The suction member may be a plate provided with a suction cup on a side wall of the plate. The plate is directly opposite the first side section and the second side section. The drive device can drive the suction member to reciprocate in the X direction and Y direction. The adsorption force of the suction member is greater than the holding force of the first continuous conveyor belt <NUM>, so that the back film <NUM> can be removed from the first continuous conveyor belt <NUM> and placed on the second continuous conveyor belt <NUM>. The suction member can be opened and closed, thereby controlling the suction member to produce the holding force. It should be noted that in the disclosure, the X direction is parallel to the extension direction of the first horizontal section or the second horizontal section, the Y direction is horizontally perpendicular to the X direction, and the Z direction is vertically perpendicular to the X direction.

The transfer device <NUM> is configured to transfer and place a pressing tool <NUM> from the output end of the second horizontal section to a front film <NUM> on the first horizontal section.

The second carrying device <NUM> is located between the output end of the first horizontal section of the first continuous conveyor belt <NUM> and the input end of the second horizontal section of the second continuous conveyor belt <NUM>. The second carrying device <NUM> is used to carry the front film <NUM> and the pressing tool <NUM> in stacked arrangement from the output end of the first horizontal section of the first continuous conveyor belt <NUM> to the input end of the second horizontal section of the second continuous conveyor belt <NUM>.

In the production equipment of the solar cell string, the second horizontal section of the second continuous conveyor belt <NUM> is used as a working platform for producing the solar cell strings. The first carrying device <NUM> carries the back film <NUM> from the first side section of the first continuous conveyor belt <NUM> to the second side section of the second continuous conveyor belt <NUM>. After the pressing tool <NUM> and the front film <NUM> are carried to the output end of the first horizontal section of the first continuous conveyor belt <NUM>, the pressing tool <NUM> and the front film <NUM> are transported to the second horizontal section of the second continuous conveyor belt <NUM> by the second carrying device <NUM>. After the pressing tool <NUM> is transported to the output end of the second continuous conveyor belt <NUM>, and then transferred by the transfer device <NUM> to the front film <NUM> on the first horizontal section of the first continuous conveyor belt <NUM>. Therefore, the back film <NUM> and the front film <NUM> can be conveyed by the same conveyor line, and the pressing tool <NUM> can be recycled, optimizing the structure of the production equipment of the solar cell string.

The production equipment of the solar cell string further includes a film-supplying device <NUM>. The film-supplying device <NUM> is provided on a side of the input end of the first horizontal section of the first continuous conveyor belt <NUM>, for preparing and laying a film group at the input end of the first horizontal section of the first continuous conveyor belt <NUM>. The film group includes the back film <NUM> and the front film <NUM>. The number of films prepared and placed by the film-supplying device <NUM> each time is not limited, which can meet the needs of the production equipment of the solar cell string. In the disclosure, the difference between the back film <NUM> and the front film <NUM> is merely that the back film <NUM> is on the back of the solar cell <NUM> in the solar cell string, and the front film <NUM> is on the front of the solar cell <NUM> in the solar cell string. The structures of the back film <NUM> and the front film <NUM> are the same, and both the back film <NUM> and the front film <NUM> are adhesive film after being heated, so the back film <NUM> and the front film <NUM> can be prepared by the film-supplying device <NUM> at the same time.

Referring to <FIG> again, in the first embodiment, the transfer device <NUM> includes a first gripping device <NUM> and a drive device. The first gripping device <NUM> is provided between the input end of the first horizontal section of the first continuous conveyor belt <NUM> and the output end of the second horizontal section of the second continuous conveyor belt <NUM>. The first gripping device <NUM> can grip the pressing tool <NUM> from the output end of the second horizontal section of the second continuous conveyor belt <NUM> and stack the pressing tool <NUM> on the front film <NUM> of the input end of the first horizontal section of the first continuous conveyor belt <NUM>. The drive device can drive the first gripping device <NUM> to implement reciprocating motion in the Y, Z direction. The first gripping device <NUM> may be a gripper or suction member, which can clamp or adsorb the pressing tool <NUM>.

Referring to <FIG>, in the second embodiment, the transfer device <NUM> includes a second gripping device <NUM>, a third continuous conveyor belt <NUM>, and a third gripping device <NUM>. The second gripping device <NUM> is located above the output end of the second horizontal section of the second continuous conveyor belt <NUM>. The third continuous conveyor belt <NUM> is located above the middle of the second horizontal section of the second continuous conveyor belt <NUM>. The third gripping device <NUM> is located between the first continuous conveyor belt <NUM> and the third continuous conveyor belt <NUM>. The conveying direction of the third continuous conveyor belt <NUM> is opposite to the conveying direction of the second horizontal section of the second continuous conveyor belt <NUM>. The second gripping device <NUM> can grab the pressing tool <NUM> from the output end of the second horizontal section of the second continuous conveyor belt <NUM> and place the pressing tool <NUM> at the input end of the third continuous conveyor belt <NUM>. The third gripping device <NUM> is located on a side of the output end of the third continuous conveyor belt <NUM>, and the third gripping device <NUM> is located close to the second carrying device <NUM>. The third gripping device <NUM> can grip the pressing tool <NUM> from the output of the third continuous conveyor belt <NUM> and stack the pressing tool <NUM> on the front film <NUM>. Specifically, the structure of the second gripping device <NUM> and the third gripping device <NUM> is the same as the structure of the first gripping device <NUM>, which will not be repeated herein. The second gripping device <NUM> is connected to the drive device and is capable of reciprocating movement in the X and Z directions. The third gripping device <NUM> is connected to the drive device and can reciprocate movement in the Y and Z directions. After the pressing tool <NUM> is stacked on the front film <NUM>, the stacked pressing tool <NUM> and front film <NUM> are transmitted over a long distance through the first continuous conveyor belt <NUM>, which is easy to misalign the pressing tool <NUM> and the front film <NUM>, making it difficult for the second carrying device <NUM> to grip the pressing tool <NUM>. Since the output end of the third continuous conveyor belt <NUM> is close to the output end of the first horizontal section of the first continuous conveyor belt <NUM>, the distance that the pressing tool <NUM> is conveyed after stacked on the front film <NUM> can be reduced, thereby reducing the risk of misalignment between the pressing tool <NUM> and the front film <NUM>.

In this embodiment, a limit plate <NUM> is provided above the output end of the third continuous conveyor belt <NUM>. When the pressing tool <NUM> is conveyed to the output end of the third continuous conveyor belt <NUM>, the limit plate <NUM> will block the pressing tool <NUM> forward. In this embodiment, a buffer station of the pressing tool <NUM> is also provided to meet the number required for the pressing tool <NUM> in the production equipment of solar cell string. Specifically, the width of the third continuous conveyor belt <NUM> is less than the length of the pressing tool <NUM>, and when the pressing tool <NUM> is placed on the third continuous conveyor belt <NUM>, the ends of the pressing tool <NUM> extend out of the third continuous conveyor belt <NUM>. Lifting plates <NUM> are provided symmetrically on both sides of the third continuous conveyor belt <NUM>, and the lifting plates <NUM> can move up and down. In the first state, the upper surface of the lifting plates <NUM> is lower than the upper surface of the third continuous conveyor belt <NUM>. In the second state, the upper surface of the lifting plates <NUM> is higher than the upper surface of the third continuous conveyor belt <NUM>. The lifting plate <NUM> and the third continuous conveyor belt <NUM> may be covered with the pressing tools <NUM>. After the pressing tools <NUM> on the third continuous conveyor belt <NUM> all flow into the production line of the solar cell string, the lifting plate <NUM> will move down to place the pressing tools <NUM> thereon on the third continuous conveyor belt <NUM> and flow into the production line of the solar cell string. The projection of each of the lifting plates <NUM> does not coincide with a projection of the third gripping device <NUM> to keep clear the second carrying device <NUM>.

Referring to <FIG>, in the second embodiment, the transfer device <NUM> further includes a buffering mechanism <NUM> and a carrying mechanism <NUM>. The buffering mechanism <NUM> is provided above the middle of the first horizontal section of the first continuous conveyor belt <NUM> for carrying the pressing tool <NUM> gripped by the third gripping device <NUM> from the output end of the third continuous conveyor belt <NUM>. The buffering mechanism <NUM> includes a synchronous belt <NUM> and a baffle <NUM>. The carrying mechanism <NUM> includes a power unit <NUM> and a manipulator <NUM> disposed above the first horizontal section of the first continuous conveyor belt <NUM>, for carrying and placing the pressing tool <NUM> from the buffering mechanism <NUM> to the front film <NUM>. The power unit <NUM> is connected to the manipulator <NUM> to drive the manipulator <NUM> such that the manipulator <NUM> can move up and down and reciprocate along the conveying direction of the first continuous conveyor belt <NUM>. The portion of the manipulator <NUM> facing the first continuous conveyor belt <NUM> is the first suction part <NUM>. The manipulator <NUM> may has the same structure as the second gripping device <NUM> and the third gripping device <NUM>, capable of reciprocating motion in the X and Z directions, which will not be repeated herein. During production, according to the actual situation, the third gripping device <NUM> can grab the pressing tool <NUM> from the output end of the third continuous conveyor belt <NUM> and stack the pressing tool <NUM> on the front film <NUM>. Or the third gripping device <NUM> can grab the pressing tool <NUM> and store the pressing tool <NUM> on the synchronous belt <NUM> of the buffering mechanism <NUM>, and the baffle <NUM> blocks the pressing tool <NUM> to prevent the pressing tool <NUM> from falling. When it is necessary to use the pressing tool <NUM> on the buffering mechanism <NUM>, the power unit <NUM> of the carrying mechanism <NUM> drives the manipulator <NUM> to move and drives the first suction part <NUM> to suction the pressing tool <NUM> on the buffering mechanism <NUM> and place the pressing tool <NUM> on the front film <NUM> near the output end of the first continuous conveyor belt <NUM>. Such a design increases productivity and prevents the accumulation of materials.

As shown in <FIG>, the production equipment further includes a first feeding device <NUM> for feeding the solar cell <NUM> and a second feeding device <NUM> for feeding the solder ribbon <NUM>. The first feeding device <NUM> is located at a side of the output end of the first horizontal section of the first continuous conveyor belt <NUM> for providing the solar cell <NUM>. The second feeding device <NUM> can draw the solder ribbon <NUM> at the input end of the second horizontal section of the second continuous conveyor belt <NUM> for providing the solder ribbon <NUM>. The position of the first feeding device <NUM> near the output end of the first horizontal section of the first continuous conveyor belt <NUM> is the gripping station of the solar cell <NUM>, and the solar cell <NUM> is provided on the gripping station. The second carrying device <NUM> can simultaneously grab the stacked pressing tool <NUM> and the front film <NUM> and the solar cell <NUM>. In an embodiment, the second carrying device <NUM> includes a connecting plate <NUM>, a first gripping mechanism <NUM> and a second gripping mechanism <NUM>. The first gripping mechanism <NUM> and the second gripping mechanism <NUM> are connected by the connecting plate <NUM> and are distributed at both ends of the connecting plate <NUM>. The first gripping mechanism <NUM> grabs the stacked pressing tool <NUM> and the front film <NUM>, and the second gripping mechanism <NUM> grabs the solar cell <NUM>. In an embodiment, the first gripping mechanism <NUM> includes a first suction plate <NUM>, a slide cylinder <NUM>, a first suction cup <NUM>, and a second suction cup <NUM>. The second gripping mechanism <NUM> includes a second suction plate <NUM> and a third suction cup <NUM>. In an embodiment, the connecting plate <NUM> is a Z-shaped plate. The first suction plate <NUM> and the second suction plate <NUM> are located at both ends of the bottom of the connecting plate <NUM>. The first suction plate <NUM> and the connecting plate <NUM> are connected by the slide cylinder <NUM> to adjust the spacing between the first suction plate <NUM> and the second suction plate <NUM>. The first suction cup <NUM> and the second suction cup <NUM> are located at the bottom of the first suction plate <NUM>. The first suction cup <NUM> has two rows for adsorbing the pressing tool <NUM>. The second suction cup <NUM> is located between two rows of first suction cups <NUM> for adsorbing the front film <NUM>. After the first suction cup <NUM> contacts the upper surface of the pressing tool <NUM>, the suction force can be generated to suction the pressing tool <NUM>. The part of the pressing tool <NUM> directly opposite the second suction cup <NUM> is provided with a through hole, because the contact surface of the pressing tool <NUM> and the front film <NUM> is smooth, the adsorption force generated by the second suction cup <NUM> can lift the front film <NUM> through the through hole. The third suction cup <NUM> is located at the bottom of the second suction plate <NUM> for adsorbing the solar cell <NUM>. By adjustment function of the slide cylinder <NUM>, the distance between the solar cell <NUM> and the pressing tool <NUM> or between the solar cell <NUM> and the front film <NUM> can be adjusted to accommodate the spacing between the cells <NUM> in the solar cell string.

Referring to <FIG>, the second embodiment of the second carrying device <NUM> is provided. The first gripping mechanism <NUM> includes a first gripper <NUM> and a second gripper <NUM>. The first gripper <NUM> includes a plurality of fourth suction cups <NUM>. The plurality of fourth suction cups <NUM> for holding the pressing tool <NUM> and the front film <NUM> at a bottom of the pressing tool <NUM>. Difference from the second carrying device <NUM> in the first embodiment is that the side of the first gripper <NUM> is also provided with the second gripper <NUM>. As shown in <FIG>, the second gripper <NUM> is provided on a side of the first gripper <NUM>. As shown in <FIG>, the two sides of the first gripper <NUM> are respectively provided with the second gripper <NUM>, the second gripper <NUM> is arranged parallel to the first gripper <NUM>, and the second gripper <NUM> is used to hold a portion of the front film <NUM> beyond the edge of the pressing tool <NUM>. The ways that the second gripping mechanism <NUM> grabs the solar cell <NUM> next to the front film <NUM> and that the plurality of fourth suction cup <NUM> absorbs the pressing tool <NUM> and the front film <NUM> on the bottom of the pressing tool <NUM> are the same as the way in the first embodiment of the second carrying device <NUM>, which will not be repeated herein. It should be noted here that when the two sides of the first gripper <NUM> are provided with the second gripper <NUM> respectively, and the held front film <NUM> exceeds the edge of the pressing tool <NUM>, the front film <NUM> below the pressing tool <NUM> may not require the fourth suction cups <NUM>.

Referring to <FIG>, a solar cell string production method is further provided, which is performed through the following steps using the solar cell string production equipment.

In an embodiment, the input end of the first horizontal section of the first continuous conveyor belt <NUM> is transported forward once every time the film is laid. It can be understood that every time the film is laid on the input end of the first horizontal section of the first continuous conveyor belt <NUM>, the first continuous conveyor belt will move to the output end of the first continuous conveyor belt <NUM> once.

In an embodiment, one film is laid once at the input end of the first horizontal section of the first continuous conveyor belt <NUM>, the first continuous conveyor belt <NUM> is transported forward once, and one film is transported to the output end of the first continuous conveyor belt <NUM> at a time.

Or every time N films are laid, the first continuous conveyor belt <NUM> is transported forward once, and M films are transported to the output end of the first continuous conveyor belt <NUM>, where N is a natural number greater than <NUM>, M is a natural number less than N.

Or every time N films are laid, the first continuous conveyor belt <NUM> is transported forward once, and N films are transported to the output end of the first continuous conveyor belt <NUM> at a time.

Or every time N films are laid, the first continuous conveyor belt <NUM> is transported forward once, and one film is transported to the output end of the first continuous conveyor belt <NUM> at a time.

In step (S4), the pressing tool <NUM> is stacked on the front film <NUM> on the first continuous conveyor belt <NUM>, thereby forming the stacked front film <NUM> and the pressing tool <NUM>.

In step (S1), at least first three films provided by the film-supplying device <NUM> are used as the back films <NUM>, and the remaining films are alternately used as the front film <NUM> and the back film <NUM>, so that the production equipment of the solar cell string can continuously work.

In step (S5), the transfer device <NUM> includes the first gripping device <NUM>. The first gripping device <NUM> grabs and stacks the pressing tool <NUM> on the second front film <NUM> located at the input end of the first horizontal section of the first continuous conveyor belt <NUM>.

In step (S5), the transfer device <NUM> includes the second gripping device <NUM>, the third continuous conveyor belt <NUM>, and the third gripping device <NUM>. The second gripping device <NUM> grips and places the pressing tool <NUM> at the input end of the third continuous conveyor belt <NUM>. The pressing tool <NUM> is conveyed to the output end of the third continuous conveyor belt <NUM>, and the third gripping device <NUM> grips and stacks the pressing tool <NUM> on the front film <NUM> near the output end of the first horizontal section of the first continuous conveyor belt <NUM>, thereby forming the stacked front film <NUM> and pressing tool <NUM>.

In step (S5), the transfer device <NUM> further includes the buffering mechanism <NUM> and the carrying mechanism <NUM>. The buffering mechanism <NUM> is located above the middle of the first horizontal section of the first continuous conveyor belt <NUM>. The third gripping device <NUM> grips the pressing tool <NUM> from the output of the third continuous conveyor belt <NUM> and places the pressing tool <NUM> on the buffering mechanism <NUM>. The carrying mechanism <NUM> includes the power unit <NUM> and the manipulator <NUM> disposed above the first horizontal section of the first continuous conveyor belt <NUM>. The manipulator <NUM> carries the pressing tool <NUM> on the buffering mechanism <NUM> and places the pressing tool <NUM> on the second front film <NUM>, thereby forming the stacked second front film <NUM> and the pressing tool <NUM>.

In step (S4), the solar cell <NUM> and the stacked front film <NUM> and the pressing tool <NUM> are transported and placed together by the second carrying device <NUM>.

In the production method, the second conveying device further includes a heating device <NUM>. The heating device <NUM> is located inside the middle of the second horizontal section of the second continuous conveyor belt <NUM>, which can heat the solar cell string from the bottom of the solar cell string. The heating device <NUM> is an electric heater. When the heating device <NUM> generates the heat energy to reach the solar cell string above the heating device <NUM>, the back film <NUM> and the front film <NUM> can be heated, thereby making the back film <NUM> and the front film <NUM> viscous, and the solder ribbon <NUM> and the solar cell <NUM> will be bonded together.

Claim 1:
An equipment for producing a solar cell string, comprising:
a first conveying device;
a second conveying device;
a first carrying device (<NUM>);
a transfer device (<NUM>);
a second carrying device (<NUM>); and
a film-supplying device (<NUM>);
a first feeding device (<NUM>) for feeding the solar cell (<NUM>);
a second feeding device (<NUM>) for feeding the solder ribbon (<NUM>);
wherein: the first conveying device comprises a first continuous conveyor belt (<NUM>) having a first horizontal section and a first side section; and a conveying direction of the first continuous conveyor belt (<NUM>) is from the first horizontal section to the first side section;
the second conveying device comprises a second continuous conveyor belt (<NUM>) having a second horizontal section and a second side section; and a conveying direction of the second continuous conveyor belt (<NUM>) is from the second side section to the second horizontal section;
the second continuous conveyor belt (<NUM>) and the first continuous conveyor belt (<NUM>) are arranged in parallel; and the first side section and the second side section are located on the same side with respect to the first horizontal section and the second horizontal section;
the first carrying device (<NUM>) is provided in front of the first side section and the second side section, and is configured to carry a back film (<NUM>) from the first side section to the second side section;
the transfer device (<NUM>) is configured to transfer and place a pressing tool (<NUM>) from an output end of the second horizontal section to a front film (<NUM>) on the first horizontal section;
the second carrying device (<NUM>) is provided between an output end of the first horizontal section and an input end of the second horizontal section; and the second carrying device (<NUM>) is configured to carry the front film (<NUM>) and the pressing tool (<NUM>) in stacked arrangement from the output end of the first horizontal section to the input end of the second horizontal section;
the film-supplying device (<NUM>) is provided on a side of an input end of the first horizontal section, and is configured to prepare and lay a film group at the input end of the first horizontal section; wherein the film group comprises the back film (<NUM>) and the front film (<NUM>); and
the first continuous conveyor belt (<NUM>) and the second continuous conveyor belt (<NUM>) are each provided with suction holes for holding the back film (<NUM>) and the front film (<NUM>).