CN108766914B - Lamination device and series welding machine - Google Patents

Abstract

The invention relates to the field of photovoltaic equipment, in particular to a lamination device and a series welding machine, wherein the lamination device comprises a suction part for sucking and releasing battery pieces and a positioning part for fixing a material taking position and a material discharging position, the positioning part comprises at least two telescopic series mechanisms, the suction part comprises at least two sets of suction mechanisms, each suction mechanism is arranged on one series mechanism in a matching way, and the suction mechanisms are driven by the corresponding series mechanism to move close to each other and far away from each other. The sheet taking position and the discharging position of the stacking device are accurately positioned through the positioning part, the sucking and placing of the battery sheets are realized through the sucking parts, each sucking mechanism is arranged on one stacking mechanism in a matching way, and the sucking mechanisms are driven by the corresponding stacking mechanism to move close to each other and away from each other, so that the stacking device can stack the effect of a plurality of battery sheets simultaneously.

Description

Lamination device and string welding machine

Technical field

The invention relates to the field of photovoltaic equipment, and in particular to a lamination device and a string welding machine.

Background technique

With the increasing rise of photovoltaic module products, my country's solar energy industry has developed rapidly. With the continuous and rapid development of my country's manufacturing industry, great breakthroughs and improvements have been made in photovoltaic module packaging, silicon wafer processing, and crystalline silicon solar cell manufacturing.

The string welding machine is one of the core equipment in the production process of traditional photovoltaic modules. It is a device that connects individual cells into battery strings through interconnecting strips. This traditional connection method will leave gaps between cells. , and at the same time, the parts blocked by the interconnection strips cannot receive sunlight, resulting in low area utilization of the entire traditional photovoltaic module, thus reducing the photoelectric conversion efficiency of the photovoltaic module. For this reason, a new shingled photovoltaic module has emerged, which adopts the principle of shingled technology. Traditionally sized cells are first cut into small pieces, and then the small pieces are rearranged and fixed in a shingled manner without using interconnecting strips. Increased power per unit area of the component.

For this new type of shingled photovoltaic modules, the traditional string welding machine is no longer suitable for the new production process. In the current production process of this new type of shingled photovoltaic modules, the lamination process is usually done by robots. This method is very cost-effective. Very high, which greatly increases the cost of production and manufacturing.

Contents of the invention

In order to solve the problem of high production costs due to the use of robots to stack battery cells in related technologies, the present invention provides a stacking device that can replace robot stacking through cooperation between mechanical structures.

The object of the present invention is achieved through the following technical solutions:

The invention provides a stacking device, which includes a suction part for sucking and releasing battery sheets and a positioning part for fixing the picking position and the discharging position. The positioning part includes at least two sets of stacking mechanisms, and the sucking part includes at least There are two sets of suction mechanisms, each suction mechanism is installed on a stacking mechanism, and each suction mechanism moves toward and away from each other driven by the corresponding stacking mechanism.

The positioning part is used to accurately position the pick-up and discharge positions of the stacking device, and then the suction part is used to pick up and place the battery cells. Each suction mechanism is installed on a stacking mechanism, and each suction mechanism is installed in the corresponding position. The stacking device is designed to move closer to and farther away from each other driven by the stacking mechanism, so that the stacking device can stack multiple cells at the same time.

Optionally, the positioning part also includes a fixed frame and a guide mechanism. The guide mechanism is fixedly installed on the fixed frame, and the stacking mechanism is slidably installed on the guide mechanism.

The stability of the entire positioning part is ensured by the fixation of the fixed frame, and the design of the guide mechanism can make the movement of the stacking mechanism smoother and more precise.

Optionally, the positioning part also includes a material retrieval positioning mechanism for fixing the material retrieval position and a material discharge positioning mechanism for fixing the material discharge position. The material retrieval positioning mechanism and the material discharge positioning mechanism are both installed on the fixed frame.

The stacking mechanism is positioned separately through the picking positioning mechanism and the placing positioning mechanism, which more accurately ensures the position during picking and placing.

Optionally, the discharging and positioning mechanism includes a first driver and a striker. The striker is fixedly installed on the stacking mechanism and is detachable. The fixed end of the first driver is fixedly connected to the fixed frame, and the movable end of the first driver is fixedly connected to the fixed frame. Push the striker pin to drive each suction mechanism to move in a direction away from the fixed end of the first driver to approach each other.

The design of the first driver and the striker pin accurately determines the position of the stacking mechanism when discharging materials from the mechanical structure, thereby ensuring that the battery cells can be in a constant relative position when stacking. The detachable design of the striker pin facilitates It can be replaced and adjusted according to the process parameters of the lamination before production.

Optionally, the retrieval positioning mechanism includes a second driver, a cam assembly, a cam follower assembly and a retrieval limit block. The fixed end of the second driver is fixedly connected to the fixed frame, and the movable end of the second driver is connected to the cam assembly. The cam assembly is driven to move. Each retrieval limit block is fixedly installed on a stacking mechanism. The cam follower assembly is equipped with a slot for blocking the retrieval limit block. The cam follower assembly is installed in conjunction with the cam assembly. , so that after the cam assembly drives the cam follower assembly to move, the material taking limit block is stuck into the slot.

The second driver drives the cam assembly, and the cam follower assembly follows the movement of the cam assembly, thereby achieving the effect of the cam follower assembly blocking the material picking limit block through the slot, thereby ensuring that the position of the stacking mechanism is fixed during material picking.

Optionally, the cam assembly includes a flat cam and a cam driving block, the cam driving block is fixedly connected to the movable end of the second driver, and the flat cam is fixedly installed on the cam driving block.

The design of the flat cam is simple and practical. The cam driving block drives the flat cam action to make the structure more stable.

Optionally, the cam follower assembly includes a circular follower, a roller and a driven plate. The circular follower and the roller are installed on two opposite sides of the driven plate respectively. The circular follower is rollingly installed. On the flat cam, rollers are arranged in pairs, and the slot is formed between each pair of rollers.

The circular follower rolls on the flat cam to drive the overall movement of the cam follower assembly. The design of the rollers being arranged in pairs not only forms a slot but also facilitates the removal of the limit block into the slot.

Optionally, the stacking mechanism includes a stacking plate and at least one elastic member. The stacking plate is slidably installed on the guide mechanism. An elastic member is installed on each stacking plate, and the elastic member moves toward another adjacent stacking plate. extend.

The stability of the movement is ensured by sliding the stacked plates on the guide mechanism, and the design of the elastic parts facilitates the returning of the stacked plates to their original positions.

Optionally, the suction mechanism includes a pneumatic slide table and a suction cup assembly. The suction cup assembly is fixedly installed on the movable end of the pneumatic slide table. The fixed end of the pneumatic slide table is fixedly connected to the stacking mechanism. The pneumatic slide table drives the suction cup assembly to move up and down. The slide table is equipped with an adjuster for adjusting the stroke of the pneumatic slide table.

The pneumatic slide table drives the movement of the suction cup assembly to realize the pickup and placement of the battery sheets. The regulator adjusts the stroke of the pneumatic slide table to achieve the effect of pre-fixing the position of the battery sheets before stacking.

Optionally, a stringing machine includes the above-mentioned stacking device. The stringing machine also includes a feeding device for providing battery sheets, a conveying device for transporting battery sheets, and a heating device for heating the battery sheets.

The battery sheets are provided through the feeding device, the stacking device takes out the battery sheets from the feeding device and stacks them, the conveying device transports the battery sheets, and the heating device heats and connects adjacent battery sheets to form a battery string.

It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present invention.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

Figure 1 is a schematic structural diagram of a lamination device provided by an embodiment of the present invention;

Figure 2 is a schematic structural diagram of the positioning part in the lamination device shown in Figure 1;

Figure 3 is a top view of the positioning portion shown in Figure 2;

Figure 4 is a schematic structural diagram of the stacked string assembly in the stacking device shown in Figure 1;

Figure 5 is a schematic structural diagram of the suction mechanism in the stacking device shown in Figure 1;

Figure 6A is a schematic diagram of the positional relationship between the planar cam and the circular follower when the stacking device shown in Figure 1 is in the non-retrieving position;

Figure 6B is a schematic diagram of the positional relationship between the cam follower assembly and the material removal limit block when the stacking device shown in Figure 1 is in the non-material removal position;

Figure 7A is a schematic diagram of the positional relationship between the planar cam and the circular follower when the stacking device shown in Figure 1 is in the material picking position;

Figure 7B is a schematic diagram of the positional relationship between the cam follower assembly and the material removal limit block when the stacking device shown in Figure 1 is in the material removal position;

Figure 8 is a schematic diagram of the stacking device shown in Figure 1 when it is in the material picking position;

Fig. 9 is a schematic diagram of the stacking device shown in Fig. 1 when it is in the discharge position.

Detailed ways

Exemplary embodiments will be described in detail below, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the appended claims.

For new shingled photovoltaic modules, traditional string welding machines are no longer suitable for the new production process. In the current production process of this new type of shingled photovoltaic modules, the lamination process is usually done by robots, which is very costly. , greatly increasing the cost of production and manufacturing.

Therefore, an object of the present invention is to provide a stacking device that can achieve the effect of replacing robot stacking through cooperation between mechanical structures. The structure of the stacking device will be illustrated below with reference to FIGS. 1 to 9 .

Figure 1 is a schematic structural diagram of a stacking device provided by an embodiment of the present invention. The stacking device has a suction part 10 for sucking and releasing battery sheets and a positioning part 20 for fixing the pickup position and the discharge position. The positioning part includes at least two sets of stacking mechanisms 21, and the suction part 10 includes at least two sets of suction mechanisms 11. Each suction mechanism 11 is installed on a stacking mechanism 21, and each suction mechanism 11 is located on the corresponding stacking mechanism 21. Drive them toward and away from each other. This embodiment uses 5 sets of string stacking mechanisms 21 to stack 5 cells at a time. Optionally, the number of string stacking mechanisms 21 can also be 2, 3, 4, ..., 10, 11, 12 sets, etc. There are no restrictions on the number of stacking mechanisms here.

As shown in Figure 2, it is a schematic structural diagram of the positioning part 20 in the stacking device shown in Figure 1. For a clearer description, a stacking mechanism is omitted in the figure. The positioning part 20 also includes a fixed frame 22, a guide mechanism 23, a picking positioning mechanism 24 and a placing positioning mechanism 25. The picking positioning mechanism 24 is used to fix the picking position and the putting positioning mechanism 25 is used to fix the putting position. They are all installed on the fixed frame 22, the guide mechanism 23 is fixedly installed on the fixed frame 22, and the stacking mechanism 21 is slidably installed on the guide mechanism 23. Optionally, the guide mechanism can be a guide shaft. The discharge positioning mechanism 25 includes a first driver 251 and a striker 252. The striker 252 is fixedly installed on the stacking mechanism 21 and is detachable. The fixed end of the first driver 251 is fixedly connected to the fixed frame. The first driver 251 The movable end of the first driver 251 pushes the striker 252 to drive each suction mechanism 11 to move in a direction away from the fixed end of the first driver 251 to approach each other.

Optionally, the suction mechanism 11 includes a pneumatic slide table 111 and a suction cup assembly 112 for sucking and placing battery sheets. The suction cup assembly 112 is fixedly installed on the movable end of the pneumatic slide table 111. The fixed end of the pneumatic slide table 111 is connected to the stacked string. The mechanism 21 is fixedly connected, and the pneumatic slide table 111 drives the suction cup assembly 112 to move up and down. The pneumatic slide table 111 is equipped with an adjuster for adjusting the stroke of the pneumatic slide table 111 (as shown in Figure 5). In this embodiment, by adjusting the regulator, the extension distance of each pneumatic sliding table 111 is set to be the same, and the retraction distance is set to increase in a stepwise manner. The specific parameters can be adjusted according to the actual situation on site.

Optionally, the stacking mechanism 21 includes a stacking plate 211 and at least one elastic member 212. The stacking plate 211 is slidably installed on the guide mechanism 23. An elastic member 212 is installed on each stacking plate 211, and the elastic member 212 moves toward Another adjacent stack of string plates 211 extends (as shown in Figure 4). In this embodiment, the movable end of the first driver 251 pushes the striker 252 to drive each stacking mechanism 21 to approach each other until the head and tail of the striker 252 of two adjacent stacking mechanisms 21 are in close contact. This position is the stacking position. The discharge position of the cell device, the overlapping distance or the gap between two adjacent cell cells can be switched by replacing the striking pins 252 of different lengths. After the play is completed, the first driver 251 retracts, and the stacking mechanisms 21 rely on the elastic force provided by the elastic member 212 to separate from each other. Of course, the stacking mechanisms 21 can also be driven by the first driver 251 or other power devices to achieve the effect of separating from each other. Here The separation method of the stacking mechanism 21 is not particularly limited.

As shown in Figure 3, which is a top view of the positioning part shown in Figure 2, the material picking positioning mechanism 24 includes a second driver 241, a cam assembly 242, a cam follower assembly 243 and a material picking limiting block 244. The second The fixed end of the driver 241 is fixedly connected to the fixed frame 22, and the movable end of the second driver 241 is connected to the cam assembly 242 and drives the cam assembly 242 to move. Each material-taking limit block 244 is fixedly installed on a stacking mechanism 21. The cam follower assembly 243 is equipped with a slot for blocking the material removal limit block 244. The cam follower assembly 243 is installed in conjunction with the cam assembly 242 to limit the removal of materials after the cam assembly 242 drives the cam follower assembly 243 to move. Block 244 is snapped into the card slot. Optionally, the cam assembly 242 includes a flat cam 2421 and a cam driving block 2422. The cam driving block 2422 is fixedly connected to the movable end of the second driver 241, and the flat cam 2421 is fixedly installed on the cam driving block 2422. Optionally, the cam follower assembly 243 includes a circular follower 2431, a roller 2432 and a driven plate 2433. The circular follower 2431 and the roller 2432 are respectively installed on two opposite sides of the driven plate 2433. The circular follower 2431 is rollingly mounted on the flat cam 2421. The rollers 2432 are arranged in pairs, and the slot is formed between each pair of rollers 2432.

The operating principle of the material picking and positioning mechanism 24 will be described below with reference to Figures 3, 6 and 7. Figure 6A is a schematic diagram of the positional relationship between the planar cam 2421 and the circular follower 2431 when the stacking device shown in Figure 1 is in the non-material picking position. Figure 6B is a schematic diagram of the cam follower assembly 243 and the circular follower assembly 243 when the stacking device is in the non-material picking position. Schematic diagram of the positional relationship of the material taking limit block 244. At this time, the circular follower 2431 is located on the lower surface of the plane cam 2421, and the roller 2432 on the opposite side of the driven plate 2433 is below the material taking limit block 244. The position of the sub 2432 will not interfere with the movement trajectory of the material taking limit block 244. Figure 7A is a schematic diagram of the positional relationship between the plane cam 2421 and the circular follower 2431 when the stacking device shown in Figure 1 is in the material picking position. Figure 7B is a schematic diagram of the cam follower assembly 243 and the material picking position when the stacking device is in the material picking position. Schematic diagram of the positional relationship of the limit block 244. At this time, the circular follower 2431 is located on the high surface of the plane cam 2421, and the roller 2432 on the opposite side of the driven plate 2433 snaps the material taking limit block 244 into the slot. This mechanical fixation method ensures the accuracy of the picking position of the stacking device. The specific action process of the picking positioning mechanism 24 is as follows: when the stacking device reaches the predetermined picking position, the second driving member 241 extends to drive the cam assembly 242 to move. In this process, the circular follower 2431 moves from the plane The low surface of the cam 2421 moves to the high surface of the flat cam 2421, thereby driving the driven plate 2433 and the roller 2432 on the driven plate 2433 to rise, and the material picking limit block 244 is stuck through the slot until the material picking is completed. Finally, the second driving member 241 retracts, the circular follower 2431 returns to the lower surface of the plane cam 2421, and the roller 2432 also drops below the material taking limit block 244. In order to enable the circular follower 2431 to return to the lower surface of the flat cam 2421 more quickly and smoothly, a tension spring can be provided between the cam follower assembly 243 and the fixed frame 22. The tension spring provides downward pulling force to facilitate the cam following. The moving assembly 243 returns to its original position.

In this embodiment, the action flow of the stacking device is as follows:

1. After the stacking device reaches the predetermined picking position, the picking positioning mechanism moves, the second driving part extends, and the picking limit block is stuck into the slot between the rollers;

2. The pneumatic slide extends out, and the suction cup assembly sucks up the battery piece (as shown in Figure 8);

3. The pneumatic slide retracts. Since the stroke of the pneumatic slide has been pre-adjusted, there is already a height difference between the cells at this time;

4. The discharging and positioning mechanism moves, and the first driving part pushes the striking pins to move until the adjacent striking pins are in close contact (as shown in Figure 9);

5. The pneumatic slide extends again, and the suction cup assembly places the battery piece at the preset placement position;

6. The pneumatic slide retracts and each mechanism returns to its position.

In this embodiment, both the first driving member and the second driving member are cylinders. Of course, they may also be motors, electric cylinders, etc. The types of the first driving member and the second driving member are not limited here.

In an implementable implementation, the lamination device is connected to a driving device or a robot, and the driving device or robot drives the lamination device to move in the X, Y, and Z directions, so as to achieve the position of the lamination device from the lamination taking position. After taking the film, move it to a distant film placement position for the purpose of film placement.

The stringing machine in this embodiment includes the above-mentioned stacking device. The stringing machine also includes a feeding device for providing battery sheets, a conveying device for transporting battery sheets, and a heating device for heating the battery sheets. The battery sheets are provided through the feeding device, the stacking device takes out the battery sheets from the feeding device and stacks them, the conveying device transports the battery sheets, and the heating device heats and connects adjacent battery sheets to form a battery string. Other mechanisms of the string welding machine in this embodiment are not the focus of the present invention and will only be briefly described here.

To sum up, the stacking device provided by the embodiment of the present application accurately locates the stacking device's stacking position and discharge position through the positioning part, and then realizes the sucking and placing of the battery sheets through the suction part. Each suction mechanism They are installed on a stacking mechanism. Each suction mechanism is driven by the corresponding stacking mechanism to move closer to and away from each other, so that the stacking device can stack multiple cells at the same time.

It should be added that, unless otherwise defined, the technical terms or scientific terms used here should have the usual meanings understood by those with ordinary skills in the field to which the present invention belongs. "A" or "an" and other similar words used in the specification and claims of the patent application of the present invention do not indicate a quantitative limit, but indicate the presence of at least one. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", etc. are only used to express relative positional relationships. When the absolute position of the described object changes, the relative positional relationship will also change accordingly. In addition, "at least two" mentioned in the article includes two or more.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary technical means in the technical field not disclosed by the invention. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the present invention is not limited to the precise construction described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (6)

1. A stacking device, characterized in that the stacking device includes a suction part for sucking and releasing battery sheets and a positioning part for fixing the picking position and the releasing position; The positioning part includes at least two sets of stacking mechanisms, and the suction part includes at least two sets of suction mechanisms. Each suction mechanism is installed on a stacking mechanism, and each suction mechanism is driven by the corresponding stacking mechanism. Movements toward and away from each other; The positioning part also includes a fixed frame and a guide mechanism, the guide mechanism is fixedly installed on the fixed frame, and the stacking mechanism is slidably installed on the guide mechanism; The positioning part also includes a retrieval positioning mechanism for fixing the retrieval position and a discharging positioning mechanism for fixing the discharging position. The retrieval positioning mechanism and the discharging positioning mechanism are both installed on the fixed frame. superior; The discharge positioning mechanism includes a first driver and a striker, the striker is fixedly installed on the stacking mechanism and is detachable, the fixed end of the first driver is fixedly connected to the fixing frame, The movable end of the first driver pushes the striker to drive each suction mechanism to move in a direction away from the fixed end of the first driver to approach each other; The retrieval positioning mechanism includes a second driver, a cam assembly, a cam follower assembly and a retrieval limit block. The fixed end of the second driver is fixedly connected to the fixed frame, and the movable end of the second driver is connected to the fixed frame. The cam assembly is connected to and drives the cam assembly to move. Each of the material taking limit blocks is fixedly installed on a stacking mechanism. The cam follower component is equipped with a block for blocking the material taking limit blocks. The cam follower component is installed cooperatively with the cam component, so that the material-removing limit block is stuck into the retainer slot after the cam component drives the cam follower component to move. 2. The stacking device according to claim 1, wherein the cam assembly includes a planar cam and a cam driving block, the cam driving block is fixedly connected to the movable end of the second driver, and the planar cam Fixedly mounted on the cam drive block. 3. The stacking device according to claim 2, wherein the cam follower assembly includes a circular follower, a roller and a driven plate, and the circular follower and the roller are respectively Installed on two opposite sides of the driven plate, the circular follower is rollingly installed on the plane cam, the rollers are arranged in pairs, and the slot is formed between each pair of rollers. 4. The stacking device according to claim 1, wherein the stacking mechanism includes a stacking plate and at least one elastic member, the stacking plate is slidably mounted on the guide mechanism, and each stacking plate An elastic member is installed on the board, and the elastic member extends toward another adjacent stack of string boards. 5. The stacking device according to claim 1, wherein the suction mechanism includes a pneumatic slide table and a suction cup assembly, the suction cup assembly is fixedly installed on the movable end of the pneumatic slide table, and the pneumatic slide table The fixed end of the table is fixedly connected to the stacking mechanism. The pneumatic slide drives the suction cup assembly to move up and down. The pneumatic slide is equipped with an adjuster for adjusting the stroke of the pneumatic slide. 6. A stringing machine, characterized in that the stringing machine includes the stacking device as claimed in any one of claims 1 to 5, and the stringing machine further includes a feeding device for providing battery sheets , a conveying device for transporting battery chips and a heating device for heating battery chips.