Cooling tool for cutting solar cell

Abstract

The utility model belongs to the technical field of production of photovoltaic cells, and particularly relates to a cooling tool for cutting a solar cell. According to the cooling tool for cutting the solar cell, the placing groove in the cooling base is used for placing the cell, the cell is positioned in the placing groove while the upper cover covers the groove opening of the placing groove, cutting positioning of the cell is achieved, the upper cover is provided with the receding opening, and therefore the cell can be cut and positioned conveniently. The upper cover does not shield the battery piece while positioning the battery piece, so that the battery piece can be conveniently cut by the cutting device; when the cutting device cuts the battery piece, the cooling assembly cools the battery piece in the placing groove, and the contact area of the cooling assembly and the battery piece is large, so that heat generated in the cutting process can be quickly dispersed, the heat influence on the battery piece is reduced, the loss of open-circuit voltage and filling factors of the cut battery piece is further reduced, and the service life of the battery piece is prolonged. And the laminated cell can obtain relatively high working efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technical field of photovoltaic cell especially relates to a cooling tool for solar cell piece cutting. BACKGROUND

[0002] At present, the efficiency of crystalline silicon cell rises very fast, and has approached the theoretical upper limit, while the laminated cell can break through the theoretical efficiency upper limit of crystalline silicon cell, especially the laminated cell composed of perovskite cell and crystalline silicon cell. In the laminated cell composed of perovskite cell and crystalline silicon cell, the perovskite cell and the crystalline silicon cell are connected in series. The voltage of the laminated cell is the sum of the voltage of the perovskite cell and the voltage of the crystalline silicon cell, while the current of the laminated cell is less than the current of the crystalline silicon cell, and the working efficiency of the laminated cell is improved. Therefore, how to improve the voltage of the crystalline silicon perovskite laminated cell becomes a key factor for improving the working efficiency of the laminated cell.

[0003] In the production process, the crystalline silicon cell in the crystalline silicon perovskite laminated cell usually obtains a small-size base cell through laser cutting, but the open-circuit voltage and the fill factor of the small-size base cell after cutting are significantly reduced due to the heat effect in the cutting process, thereby causing the working efficiency of the laminated cell to be reduced. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a cooling tool for solar cell piece cutting, reducing the temperature of the cell piece during cutting, reducing the loss of the open-circuit voltage and the fill factor of the cell piece after cutting, and making the laminated cell obtain higher working efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The cooling tool for solar cell piece cutting comprises:

[0007] A cooling base, the upper surface of the cooling base is recessed to form a placing groove matching the outline of the cell piece, the groove bottom of the placing groove is provided with a cooling assembly, and the cooling assembly is used for cooling the cell piece placed in the placing groove;

[0008] A detachable upper cover is arranged at the groove opening of the placing groove, the upper cover generates a pre-pressure to position the cell piece in the placing groove, an avoiding opening is arranged on the upper cover, and the avoiding opening is used for penetrating the cutting device to cut the cell piece.

[0009] As an optional technical solution of the above-mentioned cooling tool for solar cell piece cutting, the cooling assembly comprises a cooling pipeline, the cooling pipeline is laid on the groove bottom of the placing groove, the two ends of the cooling pipeline respectively penetrate the cooling base and are arranged outside the cooling base, one end of the cooling pipeline is a coolant inlet, and the other end of the cooling pipeline is a coolant outlet.

[0010] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, the cooling base is made of heat-conducting material, the cooling pipeline is embedded in the cooling base, and the cooling pipeline is arranged corresponding to the groove bottom of the placing groove.

[0011] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, a plurality of first positioning members are arranged around the groove opening of the placing groove on the cooling base, a plurality of second positioning members are arranged on the upper cover, and the second positioning members correspond to and connect with the first positioning members when the upper cover is arranged at the groove opening of the placing groove.

[0012] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, the first positioning member is one of a positioning column and a positioning groove, the second positioning member is the other of the positioning column and the positioning groove, and the positioning column can be inserted into the positioning groove.

[0013] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, the upper cover comprises an upper cover frame, the upper cover frame has the avoiding opening, the upper cover frame is arranged on one side surface of the cooling base where the placing groove is arranged, and a plurality of pressing components are arranged on the inner side wall of the upper cover frame in a circumferential direction, and the pressing components are used for pressing the solar cell pieces in the placing groove.

[0014] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, the pressing component comprises a pressing block, the pressing block is connected with the inner side wall of the upper cover frame, a buffer member is arranged on one side of the pressing block facing the placing groove, and the buffer member is used for pressing the solar cell pieces in the placing groove.

[0015] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, a connecting member is arranged on the cooling base, and the connecting member can be detachably connected with the upper cover when the upper cover is arranged at the groove opening of the placing groove.

[0016] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, the connecting member comprises a magnetic member, the magnetic member is fixedly arranged on the cooling base, the upper cover is made of metal material, and the magnetic member can adsorb the upper cover.

[0017] As an optional technical scheme of the above-mentioned cooling tool for cutting solar cell pieces, the magnetic member is fixedly arranged on one side of the cooling base away from the placing groove, and the cooling base is made of metal material capable of conducting magnetism.

[0018] The beneficial effects of the utility model are as follows:

[0019] The cooling tool for cutting solar cell pieces provided by the utility model has the advantages that the placing groove on the cooling base is used for placing the cell pieces, the upper cover applies pre-pressure to the cell pieces while being arranged at the slot opening of the placing groove, and the cell pieces are positioned in the placing groove, so that the cutting and positioning of the cell pieces are realized, the avoiding opening is arranged on the upper cover, so that the upper cover does not shield the cell pieces while positioning the cell pieces, so as to facilitate the cutting device to cut the cell pieces; meanwhile, the cooling assembly cools the cell pieces in the placing groove, the contact area of the cooling assembly and the cell pieces is large, heat generated in the cutting process can be quickly dispersed, so that the thermal influence on the cell pieces is reduced, the loss of the open circuit voltage and the fill factor of the cell pieces after being cut is reduced, and the laminated cell obtains higher working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the cooling tool for cutting solar cell pieces provided by the utility model embodiment;

[0021] Figure 2 is a structural schematic view of the cooling base provided by the utility model embodiment;

[0022] Figure 3 is a structural schematic view of the upper cover provided by the utility model embodiment.

[0023] In the drawings:

[0024] 1, cooling base; 2, cooling assembly; 3, upper cover; 4, connecting piece;

[0025] 11, placing groove; 12, first positioning piece;

[0026] 21, cooling pipeline; 22, coolant inlet; 23, coolant outlet;

[0027] 31, avoiding opening; 32, second positioning piece; 33, upper cover frame; 34, pressing assembly; 341, pressing block. DETAILED DESCRIPTION

[0028] The utility model will be further described in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used for explaining the utility model and are not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings rather than all the structures.

[0029] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them.And, the first feature "on", "above" and "on" the second feature includes the first feature directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature "under", "below" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0031] In the description of the embodiment, the terms "up", "down", "right", etc. The orientation or position relationship shown in the drawing is based on the orientation or position relationship, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0032] As Figures 1 to 3 As shown in the utility model provides a kind of cooling tool for solar cell cutting, it includes cooling base 1 and detachable upper cover 3.The upper surface of cooling base 1 is recessed to form placing groove 11 adapted to the outline of cell, and the groove bottom of placing groove 11 is provided with cooling assembly 2, and cooling assembly 2 is used to cool the cell placed in placing groove 11.The upper cover 3 is covered in the slot opening of placing groove 11, and the upper cover 3 is used to generate pre-pressure to position the cell in placing groove 11, and the upper cover 3 is provided with avoiding port 31, and the avoiding port 31 is used to pass through cutting device to cut the cell.

[0033] The cooling tool for cutting solar cell provided by the embodiment is used for placing the cell on the placing groove 11 on the cooling base 1, the upper cover 3 applies pre-pressure to the cell while covering the slot of the placing groove 11, the cell is positioned in the placing groove 11, the cutting positioning of the cell is realized, the avoiding opening 31 is arranged on the upper cover 3, the upper cover 3 does not shield the cell while positioning the cell, so as to facilitate the cutting device to cut the cell; while the cutting device cuts the cell, the cooling assembly 2 cools the cell in the placing groove 11, the contact area between the cooling assembly 2 and the cell is large, the heat generated in the cutting process can be quickly dispersed, so as to reduce the heat influence on the cell, and then the loss of the open circuit voltage and the fill factor of the cell after being cut is reduced, and the higher working efficiency of the laminated cell is obtained.

[0034] The cutting device is a laser cutting device. The cell can be a crystalline silicon cell, which is not specifically limited here.

[0035] In some embodiments, the cooling assembly 2 comprises a cooling pipeline 21, the cooling pipeline 21 is laid on the groove bottom of the placing groove 11, both ends of the cooling pipeline 21 are respectively provided through the cooling base 1 and placed outside the cooling base 1, one end of the cooling pipeline 21 is a coolant inlet 22, and the other end of the cooling pipeline 21 is a coolant outlet 23. The coolant can enter the cooling pipeline 21 through the coolant inlet 22 and then be discharged through the coolant outlet 23, the coolant circulates in the cooling pipeline 21, so that the temperature of the groove bottom of the placing groove 11 reaches-5℃ to 5℃, and the cooling temperature meets the production requirement.

[0036] The cooling base 1 is made of heat-conducting material, for example, metal material, the cooling pipeline 21 is embedded in the cooling base 1, and the cooling pipeline 21 is correspondingly arranged with the groove bottom of the placing groove 11, so as to protect the cooling pipeline 21 from being damaged. The cooling pipeline 21 can be spirally formed into a multi-layer annular shape or meandered into an S shape, which is not specifically limited here.

[0037] In other embodiments, the cooling assembly 2 comprises heat dissipation fins and a blower, the heat dissipation fins are arranged on the cooling base 1 and embedded in the cooling base 1, the heat dissipation fins are correspondingly arranged with the groove bottom of the placing groove 11, and the blower can blow air towards the heat dissipation fins, so as to achieve air cooling of the cell placed in the placing groove 11.

[0038] In some embodiments, a plurality of first positioning members 12 are arranged around the slot of the placing groove 11 on the cooling base 1, and a plurality of second positioning members 32 are arranged on the upper cover 3, the second positioning members 32 correspond to the first positioning members 12 one by one and are connected when the upper cover 3 covers the slot of the placing groove 11. The connection between the first positioning members 12 and the second positioning members 32 ensures that the upper cover 3 can be accurately placed on the cooling base 1, without the need for the operator to adjust the position of the upper cover 3 again, thereby improving the production efficiency.

[0039] Optionally, the first positioning member 12 is one of a positioning column and a positioning groove, the second positioning member 32 is the other of the positioning column and the positioning groove, and the positioning column is capable of being inserted into the positioning groove. In the process of covering the upper cover 3 on the cooling base 1, the positioning column is inserted into the corresponding positioning groove, and the operation is convenient.

[0040] Illustratively, the cooling base 1 is provided with the positioning column, and a plurality of positioning columns are arranged along the circumferential edge of the cooling base 1. The edge of the upper cover 3 is provided with the positioning groove, the positioning groove penetrates through the side wall of the upper cover 3, and the positioning column is inserted into the positioning groove.

[0041] In some embodiments, the cooling base 1 is provided with the connecting member 4, and when the upper cover 3 is covered at the slot opening of the placing groove 11, the connecting member 4 is capable of being detachably connected with the upper cover 3 to fix the upper cover 3 on the cooling base 1, thereby realizing the effective fixation of the battery piece placed in the placing groove 11.

[0042] Optionally, the connecting member 4 includes a magnetic member, the magnetic member is fixedly arranged on the cooling base 1, and the upper cover 3 is made of metal. The magnetic member can attract the upper cover 3, thereby realizing the detachable connection between the upper cover 3 and the cooling base 1.

[0043] Further optionally, the magnetic member is fixedly arranged on the side of the cooling base 1 away from the placing groove 11, and the cooling base 1 is made of a metal material capable of conducting magnetism, thereby increasing the magnetic attraction area of the upper cover 3 and the cooling base 1.

[0044] In other some implementable manners, the magnetic member is arranged on the side wall of the cooling base 1, and the edge of the upper cover 3 is provided with a metal block. The metal block and the magnetic member are arranged one by one.

[0045] The connecting member 4 can also be a buckle structure, and the upper cover 3 is fixed on the cooling base 1 through the buckle structure. The buckle structure is prior art, and is not specifically limited here.

[0046] In some embodiments, the upper cover 3 includes an upper cover frame 33, the upper cover frame 33 has the avoiding opening 31, the upper cover frame 33 is arranged on the side surface of the cooling base 1 provided with the placing groove 11, the inner side wall of the upper cover frame 33 is spaced apart along the circumference and is provided with a plurality of pressing components 34, the pressing components 34 are used for pressing the battery piece in the placing groove 11, fixing the battery piece in the placing groove 11, and uniformly applying pressure on the battery piece to protect the battery piece from being damaged.

[0047] Optionally, the pressing component 34 includes a pressing block 341, the pressing block 341 is connected with the inner side wall of the upper cover frame 33, and a buffer (not shown in the figure) is arranged on the side of the pressing block 341 facing the placing groove 11. The buffer is used for pressing the battery piece in the placing groove 11. When the upper cover 3 is placed on the cooling base 1 and connected with the cooling base 1, the buffer is in contact with the battery piece, and the buffer can protect the battery piece from being crushed.

[0048] The material of the buffer can be rubber, and the buffer has certain flexibility and elasticity. The thickness of the buffer can be set according to actual production requirements, and is not specifically limited here.

[0049] The material of the upper cover frame 33 and the pressing block 341 is metal, and the magnetic member can attract the upper cover frame 33 and the pressing block 341, so as to fix the upper cover 3 on the cooling base 1, and the pressing block 341 presses on the battery piece to fix the battery piece in the placing groove 11.

[0050] The thickness and width of the upper cover frame 33 can be set according to actual production requirements, and are not specifically limited here. The size of the pressing block 341 can be set according to actual production requirements, so as to stably position the battery piece without affecting the cutting device to cut the battery piece.

[0051] When the solar battery piece cutting cooling tool is used to cut the battery piece, the following steps are included:

[0052] I. The battery piece to be cut is sealed and placed in a refrigerator for cooling. The cooling temperature in the refrigerator is less than 5℃, and the cooling time can be set according to factors such as the size of the battery piece, for example, two hours.

[0053] II. The cooling base 1 is placed on the workbench of the cutting device, the coolant inlet 22 and the coolant outlet 23 of the cooling pipeline 21 are connected with the coolant circulating device respectively, the coolant enters the cooling pipeline 21, so that the temperature of the groove bottom of the placing groove 11 reaches a preset temperature, for example, 0℃.

[0054] III. The battery piece is taken out from the refrigerator, the sealing package is removed, and the battery piece is placed in the placing groove 11 of the cooling base 1.

[0055] IV. The upper cover 3 is placed on the cooling base 1, the upper cover frame 33 of the upper cover 3 is connected with the cooling base 1, and the pressing assembly 34 of the upper cover 3 presses on the battery piece.

[0056] V. The laser scribing pattern is introduced, the process parameters are set, and the laser scribing cutting of the battery piece is performed. The cutting frequency, cutting speed, cutting power, and cutting times of the laser scribing cutting can be set according to actual production requirements.

[0057] VI. After the battery piece is scribed and cut, the upper cover 3 is removed, the battery piece is taken out, and the battery piece is manually broken along the scribed position to obtain the required battery piece.

[0058] The battery piece is cooled again by the cooling assembly, that is, the battery piece is cooled before and during laser scribing, and the battery piece obtained after laser scribing has high open circuit voltage and fill factor, and can obtain real and effective laminated battery efficiency when used for laminated battery.

[0059] Comparative Example 1: without using cooling tool, the sealed battery piece is cooled in the refrigerator, and is taken out to perform laser scribing and cutting.

[0060] Comparative Example 2: without using refrigerator cooling, only the battery piece is loaded into the cooling tool to perform laser scribing and cutting.

[0061] Comparative Example 3: without cooling the battery piece, laser scribing and cutting are performed at normal temperature.

[0062] The battery pieces obtained in the above three comparative examples are tested under AM1.5G conditions, and the obtained results are as follows:

[0063] Voc (mV) Isc (mA) FF % PCE % This Example 729.7 37.9 80.52 22.26 Comparative Example 1 723.6 37.93 78.17 21.45 Comparative Example 2 722.2 37.95 77.76 21.31 Comparative Example 3 717.3 38.23 75.39 20.67

[0064] It can be known from the above table that the performance of the battery piece obtained by the cutting battery piece method provided by the utility model is better than that of the battery pieces obtained by the three comparative examples. Voc in the table is open circuit voltage, Isc is short circuit current, FF% is fill factor, and PCE% is photoelectric conversion efficiency.

[0065] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cooling tool for cutting a solar cell, characterized by comprising: The application relates to a cooling base (1) with an upper surface concaved to form a placing groove (11) matching the profile of a battery sheet, the groove bottom of the placing groove (11) being provided with a cooling assembly (2) for cooling the battery sheet placed in the placing groove (11); and a detachable upper cover (3) covering the groove opening of the placing groove (11), the upper cover (3) being used to generate a pre-pressure to position the battery sheet in the placing groove (11), the upper cover (3) being provided with an avoiding opening (31) for a cutting device to pass through to cut the battery sheet. The cooling assembly (2) comprises a cooling pipeline (21) laid on the groove bottom of the placing groove (11), the two ends of the cooling pipeline (21) penetrating through the cooling base (1) and being arranged outside the cooling base (1), one end of the cooling pipeline (21) being a coolant inlet (22), and the other end of the cooling pipeline (21) being a coolant outlet (23). The cooling base (1) is made of a heat-conducting material, the cooling pipeline (21) is embedded in the cooling base (1), and the cooling pipeline (21) is arranged in correspondence with the groove bottom of the placing groove (11).

2. The cooling tool for cutting a solar cell according to claim 1, wherein A plurality of first positioning members (12) are arranged around the groove opening of the placing groove (11) on the cooling base (1), a plurality of second positioning members (32) are arranged on the upper cover (3), and when the upper cover (3) covers the groove opening of the placing groove (11), the second positioning members (32) correspond to and are connected with the first positioning members (12) one by one.

3. The cooling tool for cutting a solar cell according to claim 2, wherein The first positioning members (12) are one of positioning columns and positioning grooves, the second positioning members (32) are the other of the positioning columns and the positioning grooves, and the positioning columns can be inserted into the positioning grooves.

4. The cooling tool for cutting a solar cell according to claim 1, wherein The upper cover (3) comprises an upper cover frame (33) with the avoiding opening (31), the upper cover frame (33) is arranged on one side surface of the cooling base (1) provided with the placing groove (11), and the inner side wall of the upper cover frame (33) is circumferentially and spacedly provided with a plurality of pressing members (34) for pressing the battery sheet in the placing groove (11).

5. The cooling tool for cutting a solar cell according to claim 4, wherein The pressing members (34) comprise pressing blocks (341) connected with the inner side wall of the upper cover frame (33), one side of the pressing blocks (341) facing the placing groove (11) is provided with a buffer member for pressing the battery sheet in the placing groove (11).

6. The cooling tool for cutting a solar cell according to claim 1, wherein The cooling base (1) is provided with a connecting member (4) which can be detachably connected with the upper cover (3) when the upper cover (3) covers the groove opening of the placing groove (11).

7. The cooling tool for cutting a solar cell according to claim 6, wherein The connecting member (4) comprises a magnetic member fixedly arranged on the cooling base (1), the upper cover (3) is made of metal, and the magnetic member can attract the upper cover (3).

8. The cooling tool for cutting a solar cell according to claim 1, wherein ​ 9. The cooling tool for cutting a solar cell according to claim 8, wherein ​ 10. The cooling tool for cutting a solar cell according to claim 9, wherein The magnetic part is fixedly arranged on the side of the cooling base (1) away from the placing groove (11), and the cooling base (1) is made of a metal material capable of conducting magnetism.

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