Laser ablation equipment for manufacturing HBC battery

Abstract

The invention relates to the technical field of HBC battery manufacturing, in particular to laser ablation equipment for HBC battery manufacturing, which comprises a precise conveying assembly, a laser ablation device arranged at the upper end of the precise conveying assembly, adjusting assemblies arranged on two sides of the precise conveying assembly, and positioning adsorption assemblies arranged on one sides of the adjusting assemblies, the positioning adsorption assembly is used for adsorbing and positioning the battery body, the positioning adsorption assembly comprises a first adsorption surface of which the bottom end is obliquely arranged, and the first adsorption surface is upwards inclined in the direction close to the laser ablation device; the airflow direction is optimized through the inclined design of the first adsorption face, volatile gas, metal particles, molten slag and other by-products generated by laser ablation are sucked in time through negative pressure airflow while adsorption positioning is conducted, and splashing pollution is avoided; the edge of the battery is positioned and adsorbed through the first and second adsorption hole groups, and the third adsorption hole group directionally sucks particulate matters in a processing area and assists in adsorbing the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of HBC battery manufacturing, in particular to a laser ablation device for HBC battery manufacturing. Background Art

[0002] N-type back-contact heterojunction (HBC) solar cells are an organic combination of heterojunction (HJT) cells and interlayer back-contact (IBC) cells, combining the structural advantages of both cells: the cell has no front electrode design, eliminating the need to consider front contact resistance, and can maximize the optimization of the front surface light trapping structure and passivation performance; the metal electrodes are all located on the back of the cell, completely eliminating the shading loss and resistance loss caused by the front electrode, increasing the short-circuit current of the HBC cell, while also improving light reflection from the back, and reducing series resistance by optimizing the cell back structure; the intrinsic hydrogenated amorphous silicon layer with excellent passivation performance reduces the interface recombination loss of the heterojunction and improves the open-circuit voltage of high-density cells; the low-temperature preparation process avoids the deformation and thermal damage to the silicon wafer caused by the high-temperature preparation process of traditional cells. High-density cells are easier to package. For example, the use of a coplanar assembly packaging mode reduces the gap between cells, increases the packaging density, and improves the appearance.

[0003] Chinese patent publication number CN107838567A discloses an edge positioning fixture comprising a supporting mechanism, a direction adjustment mechanism mounted on the supporting mechanism, a position-limiting cover plate mounted on the direction adjustment mechanism, a clamping mechanism mounted on the direction adjustment mechanism, and a plurality of pressure plate assemblies; the pressure plate assemblies are mounted on the position-limiting cover plate and the clamping mechanism; the supporting mechanism comprises a base and a main bearing member mounted in the base; the direction adjustment mechanism comprises a rotating frame, a drive assembly, a transmission adjustment member mounted on the rotating frame, and a first elastic member connected to the rotating frame; the rotating frame is connected to the base via the main bearing member; and the other end of the first elastic member is connected to the base. This edge positioning fixture of the invention allows the direction of the position-limiting cover plate to be finely adjusted by the direction adjustment mechanism after the substrate is pressed against the pressure plate assemblies. This allows the edge positioning mechanism to accurately adjust the substrate's direction to meet processing requirements even after long-term use.

[0004] Chinese patent publication number CN119387819A discloses a product positioning jig comprising a carrier, a positioning mechanism, and a ejection mechanism. The carrier is provided with a contoured groove, the positioning mechanism comprises a positioning module and at least two first positioning pins, and the ejection mechanism is configured to eject the product from the contoured groove. In this invention, the contoured groove provides a reference for placing the product, thereby facilitating product placement. Furthermore, the first positioning pins disposed within the contoured groove position the product. The positioning module, after positioning the product by the first positioning pins, pushes against the product so that the product is pressed and confined between the groove wall of the contoured groove and the positioning module, thereby fixing the product's position and preventing it from shifting during laser welding, thereby preventing any impact on weld quality. Furthermore, after welding is completed, the positioning module releases its push, and the ejection mechanism ejects the product, facilitating product removal and preventing any impact on production efficiency.

[0005] The above and similar existing technologies can, to a certain extent, complete the positioning and by-product removal during HBC battery processing. The existing positioning methods are mostly mechanical positioning. However, during the laser ablation processing of HBC batteries, mechanical positioning is easily affected by temperature changes, resulting in positioning deviation, and the rigid connection of mechanical positioning is easy to cause the HBC battery to deform. In order to adapt to the processing scenarios of HBC batteries, high-precision sensing equipment needs to be provided, which undoubtedly increases the cost and requires additional equipment to remove the micron-level by-products (gas, smoke particles, etc.) generated during the ablation process; and existing vacuum adsorption equipment such as Figure 8 As shown, adsorption holes are generally opened on the vertical side to absorb by-products. Since there is a certain distance between the adsorption holes and the processing surface, it is difficult to absorb the by-products at the moment they are generated, and the by-products cannot be removed cleanly, causing the by-products to adhere to the surface of the battery body. It is often necessary to increase the adsorption power, and the adsorption holes opened on the side are only used to adsorb by-products. This part of the suction force cannot act on the battery body, nor can it form an effective cooling effect on the battery body, and the energy utilization effect is low.

[0006] Therefore, the present invention provides a laser ablation device for HBC battery manufacturing, which can absorb the by-products while adsorbing and positioning the HBC battery, and can cool the HBC battery processing area. Summary of the Invention

[0007] In order to solve the problems in the existing technology that it is difficult to effectively absorb by-products and dissipate heat from the battery body while positioning it, a laser ablation equipment for HBC battery manufacturing is designed.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a laser ablation equipment for HBC battery manufacturing, including a precision conveying component, a laser ablation device arranged at the upper end of the precision conveying component, and adjustment components on both sides of the precision conveying component, and also including a positioning and adsorption component on one side of the adjustment component, the positioning and adsorption component adsorbs and positions the battery body, and the positioning and adsorption component includes a first adsorption surface inclined at the bottom end, the first adsorption surface is inclined upward in the direction close to the laser ablation, and is used to quickly cool and absorb the by-products generated when the laser ablation opens a hole in the passivation layer on the back of the battery body, and to cool the ablated area of the battery body.

[0009] Furthermore, the positioning adsorption component is fixedly connected to the adjustment component through a connecting piece. The positioning adsorption component includes a first adsorption surface inclined at the bottom end, and a first adsorption hole group, a second adsorption hole group and a third adsorption hole group arranged inside. The first adsorption hole group and the second adsorption hole group are used to adsorb the battery body, and the third adsorption hole group is mainly used to absorb particulate matter generated by laser ablation and assist in adsorbing the battery body.

[0010] Furthermore, the first adsorption surface is designed to be inclined toward the laser ablation device at one end close to the adjusting member, so that while adsorbing the battery body, it can absorb the particles generated by laser ablation through the third adsorption hole group, and at the same time absorb the heat of the battery body processing area during the adsorption process.

[0011] Furthermore, several groups of adsorption holes are set inside the first adsorption hole group, the second adsorption hole group and the third adsorption hole group, and the number of adsorption holes in the first adsorption hole group and the second adsorption hole group is greater than that in the third adsorption hole group. The dense setting of the adsorption holes in the edge area effectively improves the processing stability and suppresses the occurrence of edge warping.

[0012] Furthermore, the first adsorption hole group and the second adsorption hole group are perpendicular to the plane where the battery body is located, and provide an adsorption force perpendicular to the battery surface to prevent displacement caused by vibration or airflow. The third adsorption hole group is perpendicular to the first adsorption surface to compensate for the imbalance of the component force caused by the inclined surface and enhance the lateral fixing effect.

[0013] Furthermore, a second adsorption surface is provided between the first adsorption surface and the connecting member, and the first adsorption hole group and the second adsorption hole group are located on the second adsorption surface.

[0014] Furthermore, the bottom of the precision conveying component is fixedly installed with an equipment main frame, the upper end of the equipment main frame is fixedly installed with an upper shell, the laser ablation device is fixedly installed on the upper end of the upper shell, and the adjustment component is fixedly installed on the upper end of the equipment main frame.

[0015] Furthermore, the positioning adsorption assembly is connected to the vacuum generator pipeline through a connecting component.

[0016] Beneficial effects of the present invention:

[0017] The laser ablation equipment for HBC battery manufacturing described in the present invention optimizes the airflow direction through the inclined design of the first adsorption surface. While positioning the adsorption, the volatile gases, metal particles, slag and other by-products generated by laser ablation are instantly absorbed by the negative pressure airflow to avoid splashing and pollution; and the first and second adsorption hole groups are used to position the edge of the adsorption battery, and the third adsorption hole group is used to directionally suck the particles in the processing area and provide a certain suction force to assist in the adsorption of the battery, and cooperates with the vacuum generator to form a local negative pressure barrier, which significantly reduces the risk of internal contamination of the equipment; then the airflow during the adsorption process synchronously removes the heat generated by the laser energy, prevents local overheating of the battery, avoids the temperature exceeding the material tolerance threshold, protects the microstructure of the electrode material, and maintains the electrochemical performance of the battery; the passive heat dissipation achieved by the negative pressure airflow combined with the layout of the adsorption hole group does not require additional coolant or external refrigeration equipment, and avoids the risk of secondary contamination caused by the cooling medium contacting the battery surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the main body of the present invention;

[0021] Figure 3 It is a schematic diagram of the local structure of the regulating component of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the connector and positioning adsorption assembly of the present invention;

[0023] Figure 5 A partial cross-sectional view of the positioning adsorption assembly of the present invention;

[0024] Figure 6 This is a schematic diagram of a morphological structure of the positioning adsorption component of the present invention;

[0025] Figure 7 This is a schematic diagram of another structural form of the positioning adsorption component of the present invention;

[0026] Figure 8 This is a schematic diagram of the existing positioning adsorption component structure.

[0027] In the figure: 1. Equipment main frame; 2. Upper shell; 3. Precision conveying assembly; 4. Laser ablation device; 5. Adjustment assembly; 6. Connector; 7. Positioning adsorption assembly; 71. First adsorption surface; 72. Second adsorption surface; 73. First adsorption hole group; 74. Second adsorption hole group; 75. Third adsorption hole group; 8. Battery body. DETAILED DESCRIPTION

[0028] In order to make the technical means, technical features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] Example 1: Figure 1-Figure 5 As shown, the laser ablation equipment for HBC battery manufacturing described in the present invention includes a precision conveying component 3, a laser ablation device 4 arranged at the upper end of the precision conveying component 3, and adjustment components 5 on both sides of the precision conveying component 3, and also includes a positioning adsorption component 7 on one side of the adjustment component 5. The positioning adsorption component 7 adsorbs and positions the battery body 8, and the positioning adsorption component 7 includes a first adsorption surface 71 inclined at the bottom end. The first adsorption surface 71 is inclined upward in the direction of approaching the laser ablation device 4. The first adsorption surface 71 forms a small angle with the battery body 8 to assist in guiding air, and is used to quickly cool and absorb the by-products generated when the laser ablation device 4 opens a hole in the passivation layer on the back of the battery body 8, and to cool the ablated area of the battery body 8.

[0030] Specifically, the precision conveying component 3 is a conveying structure driven by a high-precision servo motor, which drives the HBC battery to be processed to the processing area. The laser ablation device 4 replaces the traditional photolithography technology and accurately removes the amorphous silicon or passivation layer in a specific area through multiple laser scanning, exposing the substrate material to achieve electrode contact, and opening holes or grooves in the passivation layer to reduce the contact area to reduce the composite current and increase the open circuit voltage. The adjustment component 5 is used to adjust the position of the positioning adsorption component 7 so that it can position and adsorb the HBC battery at the optimal position. In this embodiment, the adjustment component 5 is a combined electric telescopic rod, which adjusts the position of the positioning adsorption component 7 by telescoping. At the same time, the adjustment component 5 can also use other devices that can achieve the same effect. The positioning adsorption component 7 uses vacuum adsorption to adsorb and position the battery body 8, and at the same time quickly cools and absorbs the by-products generated in the laser ablation process, and cools the processing area of the battery body 8.

[0031] In this embodiment, the positioning adsorption component 7 is fixedly connected to the adjustment component 5 through the connecting member 6. The positioning adsorption component 7 includes a first adsorption surface 71 inclined at the bottom end, and a first adsorption hole group 73, a second adsorption hole group 74 and a third adsorption hole group 75 arranged inside. The first adsorption hole group 73 and the second adsorption hole group 74 are used to adsorb the battery body 8, and the third adsorption hole group 75 is mainly used to absorb volatile gases, particulate matter, etc. generated by laser ablation, and to assist in adsorbing the battery body 8.

[0032] Specifically, such as Figure 4 and Figure 7As shown, the first adsorption surface 71 is set to an inclined shape, so that it can cool and absorb the by-products generated by the processing while positioning and adsorbing the battery body 8. At the same time, the first adsorption surface 71 can also be set to an arc shape, which can increase the adsorption range of the third adsorption hole group 75, and further improve the absorption effect of the by-products, and reduce adhesion. The first adsorption hole group 73 and the second adsorption hole group 74 are used as the main adsorption hole groups to position and adsorb the battery body 8 through multiple groups of adsorption holes set inside. The third adsorption hole group 75 assists in the adsorption of the battery body 8, and is mainly used to quickly cool and absorb the particulate matter generated by laser ablation of the battery body 8 to prevent it from remaining on the equipment and the battery body 8 to cause pollution and corrosion. While absorbing the particulate matter, the ablated area of the battery body 8 can be cooled to prevent it from being in a high temperature state for a long time, resulting in a decrease in internal performance.

[0033] In this embodiment, the first adsorption surface 71 is designed to be inclined from the end close to the adjusting part toward the laser ablation device 4, so that while it adsorbs the battery body 8, it can absorb the particulate matter generated by laser ablation through the third adsorption hole group 75, and at the same time, it can absorb the heat of the processing area of the battery body 8 during the adsorption process. Specifically, the first adsorption surface 71 is gradually inclined from the end adjacent to the connecting part 6 toward the laser ablation device 4, and several groups of adsorption holes are set inside the first adsorption hole group 73, the second adsorption hole group 74 and the third adsorption hole group 75, and the number of adsorption holes in the first adsorption hole group 73 and the second adsorption hole group 74 is greater than that in the third adsorption hole group 75. The dense setting of the adsorption holes in the edge area effectively improves the processing stability and suppresses the occurrence of edge warping.

[0034] In this embodiment, the first adsorption hole group 73 and the second adsorption hole group 74 are perpendicular to the plane where the battery body 8 is located, and provide an adsorption force perpendicular to the battery surface to prevent displacement caused by vibration or airflow. The third adsorption hole group 75 is perpendicular to the first adsorption surface 71, compensating for the imbalance of component forces caused by the inclined surface and enhancing the lateral fixing effect. The precision conveying component 3 is fixedly installed with the equipment main frame 1 at the bottom, and the upper shell 2 is fixedly installed at the upper end of the equipment main frame 1. The laser ablation device 4 is fixedly installed at the upper end of the upper shell 2. The adjustment component 5 is fixedly installed at the upper end of the equipment main frame 1. The positioning adsorption component 7 is connected to the vacuum generator pipeline through a connecting component.

[0035] Specifically, the main frame 1 of the equipment is used to install various components, the upper shell 2 is fixedly set at the upper end of the main frame 1 of the equipment, and the laser ablation device 4 is located on the top surface inside the upper shell 2. The upper shell 2 can block the processing area, and the vacuum generator serves as the power source for positioning the adsorption component 7.

[0036] Example 2: Figures 1-6On the basis of the first embodiment, a second adsorption surface 72 is provided between the first adsorption surface 71 and the connecting member 6. The first adsorption hole group 73 and the second adsorption hole group 74 are located on the second adsorption surface 72 and are perpendicular to the second adsorption surface 72 to reduce the gap between the first adsorption hole group 73 and the second adsorption hole group 74 and the battery body 8, thereby improving a certain adsorption effect and reducing power consumption. At the same time, the third adsorption hole group 75 is located on the first adsorption surface 71 and is perpendicular to the first adsorption surface 71 to assist in adsorbing the battery body 8 and absorbing particulate matter generated by laser ablation.

[0037] In this embodiment, the adsorption force calculation based on pressure difference is that the positioning adsorption component 7 generates adsorption force through vacuum adsorption, which can be calculated according to the pressure difference principle. The formula is F = ΔP × A, where F is the adsorption force, ΔP is the pressure difference between the inside and outside of the adsorption structure, and A is the effective adsorption area;

[0038] For the second adsorption surface 72 (horizontal section) and the first adsorption surface 71 (inclined section), the effective adsorption area needs to be calculated separately. The effective adsorption area of the second adsorption surface 72 (horizontal section) can be directly determined based on the contact area with the battery body 8; the effective adsorption area of the first adsorption surface 71 (inclined section) needs to take into account the influence of the inclination angle on the projected area, that is, the sum of the adsorption forces provided by the two is greater than the sum of the gravity of the battery body 8 itself, the laser recoil force, and other possible vertical downward forces applied to the battery body 8.

[0039] In the processing process of the above embodiment, a high-precision servo motor drives a precision conveying assembly 3 (hereinafter referred to as a conveyor belt), and at the same time cooperates with a loading device to place the battery body 8 on the conveyor belt for conveying. Then, when the battery body 8 is conveyed to the laser ablation processing area, the adjustment assembly 5 adjusts the position of the matching connector 6 to adjust the position of the positioning and adsorption assembly 7 so that it tends to the battery body 8. Then, the vacuum generator is activated to drive the positioning and adsorption assembly 7 to position and adsorb the battery body 8.

[0040] Then, by tilting the first adsorption surface 71, it can cool and absorb the by-products generated by the processing while positioning and adsorbing the battery body 8. Then, the edges of the battery body 8 are adsorbed and positioned through the adsorption holes provided in the first adsorption hole group 73 and the second adsorption hole group 74. At the same time, the third adsorption hole group 75 can also quickly cool and absorb the particulate matter generated during the laser ablation of the battery body 8 while adsorbing the battery body 8, preventing it from remaining on the equipment and the battery body 8 and causing pollution and corrosion. At the same time, when absorbing the by-products, it can take away the heat generated by the laser ablation of the battery body 8, preventing it from being in a high temperature state for a long time and causing internal performance degradation.

[0041] At the same time, a second adsorption surface 72 is provided between the connecting member 6 and the first adsorption surface 71. At this time, the first adsorption hole group 73 and the second adsorption hole group 74 are provided on the second adsorption surface 72 to reduce the gap between the first adsorption hole group 73 and the second adsorption hole group 74 and the battery body 8, thereby improving a certain adsorption effect and reducing power consumption. The third adsorption hole group 75 is provided on the first adsorption surface 71. At the same time, the first adsorption surface 71 can also be provided in an arc shape, which can increase the adsorption range of the third adsorption hole group 75 and further increase the absorption of by-products.

[0042] Finally, the position of the positioning adsorption component 7 is adjusted by adjusting the component 5, and the suction force of the first adsorption hole group 73, the second adsorption hole group 74 and the third adsorption hole group 75 is gradually reduced, so that the battery body 8 is placed back on the conveyor belt and transported to the next processing area through the conveyor belt, and the subsequent battery body 8 continues to be laser ablated.

[0043] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser ablation device for HBC battery manufacturing, comprising a precision conveying assembly (3), a laser ablation device (4) arranged at the upper end of the precision conveying assembly (3), and adjustment assemblies (5) on both sides of the precision conveying assembly (3), characterized in that: The invention also includes a positioning adsorption component (7) on one side of the adjustment component (5), the positioning adsorption component (7) adsorbs and positions the battery body (8), and the positioning adsorption component (7) includes a first adsorption surface (71) tilted at the bottom end, the first adsorption surface (71) tilted upward in a direction close to the laser ablation device (4), and is used to quickly cool and absorb byproducts generated when the laser ablation device (4) opens a hole in the passivation layer on the back of the battery body (8), and to cool the ablated area of the battery body (8).

2. The laser ablation equipment for HBC battery manufacturing according to claim 1, characterized in that: The positioning adsorption component (7) is fixedly connected to the adjustment component (5) via a connector (6). The positioning adsorption component (7) further comprises a first adsorption hole group (73), a second adsorption hole group (74), and a third adsorption hole group (75) arranged therein. The first adsorption hole group (73) and the second adsorption hole group (74) are used to adsorb the battery body (8), and the third adsorption hole group (75) is mainly used to absorb particles generated by laser ablation and assist in adsorbing the battery body (8).

3. The laser ablation equipment for HBC battery manufacturing according to claim 2, characterized in that: The first adsorption surface (71) is designed to be inclined from one end close to the adjusting member toward the laser ablation device (4), so that while adsorbing the battery body (8), it can absorb particles generated by laser ablation through the third adsorption hole group (75), and at the same time absorb heat from the processing area of the battery body (8) during the adsorption process.

4. The laser ablation equipment for HBC battery manufacturing according to claim 3, characterized in that: Several groups of adsorption holes are arranged inside the first adsorption hole group (73), the second adsorption hole group (74) and the third adsorption hole group (75), and the number of adsorption holes in the first adsorption hole group (73) and the second adsorption hole group (74) is greater than that in the third adsorption hole group (75). The dense arrangement of adsorption holes in the edge area effectively improves processing stability and suppresses edge warping.

5. The laser ablation equipment for HBC battery manufacturing according to claim 4, characterized in that: The first adsorption hole group (73) and the second adsorption hole group (74) are perpendicular to the plane where the battery body (8) is located, and provide an adsorption force perpendicular to the battery surface to prevent displacement caused by vibration or airflow. The third adsorption hole group (75) is perpendicular to the first adsorption surface (71), compensating for the unbalanced component force caused by the inclined surface, and enhancing the lateral fixing effect.

6. The laser ablation equipment for HBC battery manufacturing according to claim 5, characterized in that: A second adsorption surface (72) is provided between the first adsorption surface (71) and the connecting member (6), and the first adsorption hole group (73) and the second adsorption hole group (74) are located on the second adsorption surface (72).

7. The laser ablation equipment for HBC battery manufacturing according to claim 1, characterized in that: The bottom of the precision conveying component (4) is fixedly mounted with an equipment main frame (1), the upper end of the equipment main frame (1) is fixedly mounted with an upper shell (2), the laser ablation device (3) is fixedly mounted on the upper end of the upper shell (2), and the adjustment component (5) is fixedly mounted on the upper end of the equipment main frame (1).

8. The laser ablation equipment for HBC battery manufacturing according to claim 2, characterized in that: The positioning adsorption component (7) is connected to the vacuum generator pipeline via a connecting component.

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