Heterojunction cell low-loss cutting device

Abstract

The low-loss cutting device comprises a workbench, a pressing mechanism, laser cutting equipment and a cooling liquid spraying mechanism, the upper end face of the workbench is provided with a cutting position used for cutting the battery, the workbench is provided with a hot air nozzle, the hot air nozzle is close to the cutting position so as to heat the battery to be cut, and the hot air nozzle is connected with a heat source; the pressing mechanism is arranged above the workbench so as to press a battery to be cut on the workbench; the laser cutting equipment is arranged above the workbench and is used for carrying out laser cutting on the battery; and the cooling liquid spraying mechanism is arranged above the working table so as to spray cooling liquid while the battery is cut, the cooling liquid spraying mechanism is provided with a spraying opening, and the spraying opening faces the cutting position of the battery. According to the invention, the cutting damage of the heterojunction cell is reduced through a rapid cooling mode. And by arranging the pressing mechanism, the situation that the heterojunction battery moves in the cutting process, so that the cutting position deviates, and then high loss is caused is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a low-loss cutting device for heterojunction batteries. Background Art

[0002] Heterojunction cells are a type of solar cell that consists of p-type semiconductors and n-type semiconductors. Heterojunction cells have the characteristic of converting solar energy into electrical energy, so they are widely used in solar equipment such as solar panels, solar chargers, and solar street lights. In addition, heterojunction cells can also be used in electronic products such as wireless communications, computers, and smartphones.

[0003] The structure of the heterojunction cell is: based on the crystalline silicon surface layer, from the inside to the outside, it is an intrinsic hydrogenated amorphous silicon layer / hydrogenated amorphous silicon layer / intrinsic transparent conductive layer TCO. Due to the low temperature characteristics of the intrinsic transparent conductive layer TCO, the use of traditional laser cutting will result in an efficiency loss of about 0.35%, which is much higher than the 0.1% cutting efficiency loss of conventional PERC cells. This is because no cooling measures are used during the cutting process, the cell structure damage and the composite loss of the cut surface cause the cell power to decrease, and the power generation of the components of the same area is reduced. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a low-loss cutting device for heterojunction batteries, which can reduce cutting losses.

[0005] An embodiment of the present invention proposes a low-loss cutting device for heterojunction batteries, comprising: a workbench, a clamping mechanism, a laser cutting device and a coolant spraying mechanism, wherein the upper end surface of the workbench has a cutting position for cutting batteries, and a hot air nozzle is provided on the workbench, the hot air nozzle is close to the cutting position to heat the battery to be cut, and the hot air nozzle is connected to a heat source; the clamping mechanism is arranged above the workbench to press the battery to be cut onto the workbench; the laser cutting device is arranged above the workbench to perform laser cutting on the battery, and the laser cutting device has an emitting end; the coolant spraying mechanism is arranged above the workbench to spray coolant on the battery while cutting, and the coolant spraying mechanism has a spraying port, and the spraying port faces the battery cutting position.

[0006] In some embodiments, the cutting position is a groove opened at the upper end of the workbench, the groove is in the shape of a long strip, the laser cutting equipment cuts the battery along the length direction of the groove, and the hot air nozzle is arranged at the bottom of the groove.

[0007] In some embodiments, the laser cutting device is connected to a first lifting mechanism to adjust the height of the laser cutting device.

[0008] In some embodiments, the first lifting mechanism includes a first hydraulic cylinder body, a first telescopic rod and a support plate, the first hydraulic cylinder body is installed above the workbench, the first telescopic rod is telescoped below the first hydraulic cylinder body, the support plate is fixedly connected to the lower end of the first telescopic rod, and the laser cutting equipment is fixedly connected to the support plate.

[0009] In some embodiments, the coolant spraying mechanism is fixedly connected to the support plate, and the coolant spraying mechanism moves synchronously with the laser cutting equipment.

[0010] In some embodiments, the clamping mechanism includes a second hydraulic cylinder body, a second telescopic rod and a pressure plate. The second hydraulic cylinder body is connected to the robotic arm to control the orientation of the clamping mechanism. The second telescopic rod is telescoped below the second hydraulic cylinder body. The pressure plate is arranged in a horizontal direction and is fixedly connected to the lower end of the second telescopic rod.

[0011] In some embodiments, the bottom of the pressing plate is fixedly connected to a rubber pad.

[0012] In some embodiments, the hot air nozzle is connected to a heat source via a hot air pipeline, and the heat source is industrial waste heat.

[0013] In some embodiments, the heterojunction battery low-loss cutting device also includes a cutting workshop, which has a closed chamber, and the workbench, the clamping mechanism, the laser cutting equipment and the coolant spraying mechanism are all arranged in the closed chamber.

[0014] In some embodiments, the cutting workshop has an exhaust port, which is connected to an exhaust pipeline. An exhaust fan and an exhaust gas treatment device are provided on the exhaust pipeline to discharge the smoke generated by cutting the battery after treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0016] in:

[0017] Figure 1 It is a schematic structural diagram of a low-loss cutting device for heterojunction batteries in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the positions of the grooves, hot air nozzles and pressing mechanism on the workbench;

[0019] Reference numerals:

[0020] 1. Cutting workshop; 2. Laser cutting equipment; 3. Second hydraulic cylinder; 4. Press plate; 5. Rubber pad; 6. Groove; 7. First hydraulic cylinder; 8. Exhaust gas treatment device; 9. Exhaust fan; 10. Coolant spray mechanism; 11. Support plate; 12. Workbench; 13. Hot air pipeline; 14. Hot air nozzle. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] The following describes a low-loss cutting device for heterojunction batteries according to an embodiment of the present invention with reference to the accompanying drawings.

[0023] like Figure 1-2 As shown, an embodiment of the present invention proposes a low-loss cutting device for heterojunction batteries, including: a workbench 12, a clamping mechanism, a laser cutting device 2 and a coolant spraying mechanism 10, the upper end surface of the workbench 12 has a cutting position for cutting batteries, and a hot air nozzle 14 is provided on the workbench 12, and the hot air nozzle 14 is close to the cutting position to heat the battery to be cut, and the hot air nozzle 14 is connected to a heat source; the clamping mechanism is arranged above the workbench 12 to press the battery to be cut on the workbench 12; the laser cutting device 2 is arranged above the workbench 12 to perform laser cutting on the battery, and the laser cutting device 2 has an emitting end; the coolant spraying mechanism 10 is arranged above the workbench 12 to spray coolant on the battery while cutting, and the coolant spraying mechanism 10 has a spraying port, and the spraying port faces the battery cutting position.

[0024] The embodiment of the present invention reduces the cutting damage of heterojunction cells by providing a laser cutting device 2 and a coolant spraying mechanism 10 through rapid cooling. The clamping mechanism is provided to prevent the heterojunction cells from moving during the cutting process, thereby causing the cutting position to shift and thus causing high loss.

[0025] It should be noted that the batteries mentioned in this article are all heterojunction batteries.

[0026] Furthermore, the coolant sprayed by the spray cooling mechanism is liquid nitrogen or liquid carbon dioxide or other coolants that can play the same role.

[0027] In some embodiments, Figure 2 As shown, the cutting position is a groove 6 opened at the upper end of the workbench 12, the groove 6 is a long strip, the laser cutting device 2 cuts the battery along the length direction of the groove 6, and the hot air nozzle 14 is arranged at the bottom of the groove 6. This can prevent the laser from damaging the table top of the workbench 12.

[0028] When in use, align the part of the battery to be cut above the groove 6, drive the pressing mechanism, press the four corners of the battery, turn on the hot air, heat the part to be cut, and perform laser cutting after heating to a certain temperature. While cutting, turn on the coolant spraying mechanism 10 to spray and cool the cut part.

[0029] The battery can be placed manually or by using a mechanism combining a robotic arm and a suction cup.

[0030] Furthermore, the workbench 12 is provided with scales on its surface to facilitate accurate cutting.

[0031] Furthermore, the hot air nozzle 14 may be in the shape of a long strip or a row of circular nozzles.

[0032] In some embodiments, Figure 1 As shown, the laser cutting device 2 is connected to a first lifting mechanism to adjust the height of the laser cutting device 2. The lifting of the laser cutting device 2 can be adjusted according to the height of the battery to be cut.

[0033] In some embodiments, Figure 1 As shown, the first lifting mechanism includes a first hydraulic cylinder body 7, a first telescopic rod and a support plate 11. The first hydraulic cylinder body 7 is installed above the workbench 12. The first telescopic rod is telescoped below the first hydraulic cylinder body 7. The support plate 11 is fixedly connected to the lower end of the first telescopic rod, and the laser cutting equipment 2 is fixedly connected to the support plate 11.

[0034] In some embodiments, Figure 1 As shown, the coolant spraying mechanism 10 is fixedly connected to the support plate 11, and the coolant spraying mechanism 10 moves synchronously with the laser cutting device 2, so as to ensure that the coolant spraying position is always consistent with the cutting position.

[0035] In some embodiments, Figure 1 As shown, the clamping mechanism includes a second hydraulic cylinder body 3, a second telescopic rod and a pressing plate 4. The second hydraulic cylinder body 3 is connected to the mechanical arm to control the orientation of the clamping mechanism. The second telescopic rod is telescoped below the second hydraulic cylinder body 3. The pressing plate 4 is arranged in the horizontal direction and is fixedly connected to the lower end of the second telescopic rod.

[0036] Further, if Figure 2 As shown, there are four clamping mechanisms, which are respectively arranged at the four corners of the workbench 12, so that the battery clamping and positioning are more stable.

[0037] In some embodiments, Figure 1 As shown, the bottom of the pressing plate 4 is fixedly connected to the rubber pad 5. This can prevent the pressing plate 4 from damaging the battery when squeezing the battery.

[0038] In some embodiments, Figure 1As shown, the hot air nozzle 14 is connected to the heat source through the hot air pipeline 13, and the heat source is industrial waste heat. By using industrial waste heat to heat the battery instead of the traditional heating plate, on the one hand, the industrial waste heat can be effectively utilized to reduce energy loss, and on the other hand, the battery heating can be made more uniform, which is more conducive to cutting.

[0039] Furthermore, a filtering device is provided on the hot air pipeline 13 to filter out particulate matter and harmful components in the hot air.

[0040] In some embodiments, Figure 1 As shown, the low-loss cutting device for heterojunction cells also includes a cutting workshop 1, which has a closed chamber, and a workbench 12, a clamping mechanism, a laser cutting device 2 and a coolant spraying mechanism 10 are all arranged in the closed chamber. The cutting workshop 1 can prevent the smoke generated by cutting from diffusing into the atmosphere and causing pollution.

[0041] In some embodiments, Figure 1 As shown, the cutting workshop 1 has an exhaust port, which is connected to an exhaust pipeline. An exhaust fan 9 and an exhaust gas treatment device 8 are arranged on the exhaust pipeline to treat and discharge the smoke generated by the cutting battery. The smoke can be discharged through the exhaust fan 9, then treated by the exhaust gas treatment device 8, and finally discharged into the atmosphere to prevent pollution to the atmosphere.

[0042] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A low-loss cutting device for heterojunction batteries, characterized in that: include: A workbench, wherein the upper end surface of the workbench has a cutting position for cutting batteries, and a hot air nozzle is provided on the workbench, wherein the hot air nozzle is close to the cutting position to heat the batteries to be cut, and the hot air nozzle is connected to a heat source; A pressing mechanism, the pressing mechanism is arranged above the workbench to press the battery to be cut onto the workbench; A laser cutting device, the laser cutting device is arranged above the workbench to perform laser cutting on the battery, and the laser cutting device has an emitting end; A coolant spraying mechanism is arranged above the workbench to spray coolant on the battery while cutting. The coolant spraying mechanism has a spraying port, and the spraying port faces the battery cutting position.

2. The low-loss cutting device for heterojunction cells according to claim 1, characterized in that: The cutting position is a groove opened at the upper end of the workbench, the groove is in the shape of a long strip, the laser cutting equipment cuts the battery along the length direction of the groove, and the hot air nozzle is arranged at the bottom of the groove.

3. The low-loss cutting device for heterojunction cells according to claim 1, characterized in that: The laser cutting device is connected to a first lifting mechanism to adjust the height of the laser cutting device.

4. The low-loss cutting device for heterojunction cells according to claim 3, characterized in that: The first lifting mechanism includes a first hydraulic cylinder body, a first telescopic rod and a support plate. The first hydraulic cylinder body is installed above the workbench. The first telescopic rod is telescoped below the first hydraulic cylinder body. The support plate is fixedly connected to the lower end of the first telescopic rod. The laser cutting equipment is fixedly connected to the support plate.

5. The low-loss cutting device for heterojunction cells according to claim 4, characterized in that: The coolant spraying mechanism is fixedly connected to the support plate, and the coolant spraying mechanism moves synchronously with the laser cutting equipment.

6. The low-loss cutting device for heterojunction cells according to claim 1, characterized in that: The clamping mechanism includes a second hydraulic cylinder body, a second telescopic rod and a pressure plate. The second hydraulic cylinder body is connected to a mechanical arm to control the orientation of the clamping mechanism. The second telescopic rod is telescoped below the second hydraulic cylinder body. The pressure plate is arranged in a horizontal direction and is fixedly connected to the lower end of the second telescopic rod.

7. The low-loss cutting device for heterojunction cells according to claim 6, characterized in that: The bottom of the pressing plate is fixedly connected to a rubber pad.

8. The low-loss cutting device for heterojunction cells according to claim 1, characterized in that: The hot air nozzle is connected to the heat source through a hot air pipeline, and the heat source is industrial waste heat.

9. The low-loss cutting device for heterojunction cells according to claim 1, characterized in that: It also includes a cutting workshop, which has a closed chamber, and the workbench, the clamping mechanism, the laser cutting equipment and the coolant spraying mechanism are all arranged in the closed chamber.

10. The low-loss cutting device for heterojunction cells according to claim 1, characterized in that: The cutting workshop has an exhaust port, which is connected to an exhaust pipeline. An exhaust fan and an exhaust gas treatment device are arranged on the exhaust pipeline to discharge the smoke generated by the cutting battery after treatment.

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