Back contact battery isolation paper and battery piece feeding mechanism

Abstract

The invention provides back contact battery isolation paper and a battery piece feeding mechanism, the back contact battery isolation paper comprises a paper body, the outer periphery of the paper body is provided with edge pressure relief holes, and the problem that in the prior art, the separation efficiency of back contact battery pieces and isolation paper is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell processing, and in particular to a back contact battery isolation paper and a battery cell feeding mechanism. Background Art

[0002] In the field of photovoltaic technology, back-contact cells are an advanced solar cell design. Their unique manufacturing process requires the precise deposition of a tunneling silicon oxide layer, an intrinsic polysilicon layer, and a phosphorus-doped polysilicon layer on the back of the silicon wafer, followed by an oxygen annealing to form a mask layer. After this series of precise treatments, the back is precisely etched to remove the mask layer and the first semiconductor layer in a specific area, thereby forming a second semiconductor opening area to prepare for the subsequent process. A cleaning step is then performed to remove the remaining mask layer on the back except for the second semiconductor opening area to ensure the realization and efficiency of the subsequent functions of the battery.

[0003] In view of the special manufacturing process of back-contact cells, in order to maintain the integrity of the cells during the production process, especially to protect the velvet surface from any scratches and ensure the photoelectric conversion efficiency, isolation paper must be placed between the cells. However, the design of traditional isolation paper has limitations, especially in the hole design. Due to the difference in air pressure between the cell and the paper (negative pressure effect), it is difficult to effectively separate the cell and the isolation paper during the separation process, which significantly affects the separation yield and thus reduces the efficiency and capacity of the production line.

[0004] In the prior art, the cell separator paper has a circle of smaller holes in the middle and a circle of larger holes on the outside. When the cell is separated from the separator paper, the negative pressure in the center is concentrated in the center of the cell, making separation difficult. The tape rate of the separator paper seriously affects the production line cycle, utilization rate, and yield rate. The existence of this problem leads to a low efficiency in separating the cell from the separator paper, which not only increases production costs, but also poses a potential risk to the integrity of the cell, making it impossible to quickly and efficiently separate the cell from the separator paper, affecting the separation yield rate. Summary of the invention

[0005] The main purpose of the present invention is to provide a back contact battery separator paper and a battery cell feeding mechanism to solve the problem of low separation efficiency between the back contact battery cell and the separator paper in the prior art.

[0006] To achieve the above object, according to one aspect of the present invention, a back-contact battery separator paper is provided. The back-contact battery separator paper comprises a paper body, and edge pressure relief holes are provided at the outer periphery of the paper body.

[0007] Furthermore, the paper body is a rectangular paper surrounded by four outer peripheries, and each outer periphery is provided with an edge pressure relief hole; and / or the width dimension of the edge pressure relief hole in the extension direction parallel to the corresponding outer periphery gradually increases along the direction approaching the corresponding outer periphery; and / or a plurality of intermediate pressure relief holes are provided in the middle of the paper body.

[0008] Further, the number of the edge pressure relief hole at the same outer periphery is one; and / or the number of the edge pressure relief holes at the same outer periphery is multiple, and the multiple edge pressure relief holes are arranged at intervals along the extension direction of the corresponding outer periphery.

[0009] Furthermore, the edge pressure relief hole is a semicircular hole; and / or the edge pressure relief hole is a polygonal hole.

[0010] According to another aspect of the present invention, a battery cell feeding mechanism is provided, which is suitable for the above-mentioned back-contact battery isolation paper, and the battery cell feeding mechanism comprises: a support platform; a feeding box, which is arranged on the support platform, and the feeding box comprises a bottom plate and a plurality of side panels arranged at intervals around the circumference of the bottom plate to jointly form a material containing cavity; a blowing component, which is arranged on the support platform and located on the circumference of the feeding box, and the blowing component is arranged toward the material containing cavity to blow air toward the edge pressure relief holes of the back-contact battery isolation paper located in the material containing cavity to pre-separate the back-contact battery isolation paper.

[0011] Furthermore, the bottom plate is a rectangular plate body, the loading box includes eight side panels arranged at intervals, the eight side panels are arranged in groups of two and one-to-one on four sides of the bottom plate, and the blowing component is located between two side panels arranged in groups.

[0012] Further, the loading box is a rectangular structure; wherein, the number of blowing components is one; or the number of blowing components is two, and the two blowing components are arranged at intervals on opposite sides of the loading box along the first direction; or the number of blowing components is three, and the three blowing components are arranged one-to-one on three of the four sides of the loading box; or the number of blowing components is four, and the four blowing components are arranged one-to-one on the four sides of the loading box.

[0013] Furthermore, the blowing component includes an air knife; and / or the battery cell feeding mechanism includes a mounting plate, the mounting plate is arranged on one side of the support platform, and the blowing component is mounted on the mounting plate.

[0014] Furthermore, the cell loading assembly includes a photoelectric component, which includes a transmitting part and a receiving part. The transmitting part and the receiving part are arranged at opposite sides of the loading box along the first direction to detect the height of the material in the material holding cavity.

[0015] Furthermore, the cell loading assembly includes a driving unit, which is drivingly connected to the support table to drive the support table to move.

[0016] By applying the technical solution of the present invention, the back contact battery separator paper of the present invention includes a paper body, and edge pressure relief holes are provided at the outer periphery of the paper body. In this way, the back contact battery separator paper of the present invention can better release the negative pressure between the paper and the battery cell when the battery cell is loaded by setting the edge pressure relief holes, effectively solving the negative pressure problem in the process of separating the battery cell from the separator paper, significantly improving the separation efficiency of the battery cell and the separator paper, solving the problem of low separation efficiency of the back contact battery cell and the separator paper in the prior art, reducing the paper carrying rate, reducing the downtime and abnormal processing time of the battery cell loading mechanism, thereby improving the utilization rate and yield of the production line, speeding up the production rhythm, and further improving the production capacity. In addition, the back contact battery separator paper of the present invention not only optimizes the loading process of the battery cell, but also effectively protects the surface of the battery cell and avoids scratches, which has significant benefits in improving the overall performance and reliability of photovoltaic modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A top view of an embodiment of a back contact battery separator paper according to the present invention is shown;

[0019] Figure 2 A top view showing another embodiment of a back contact battery separator paper according to the present invention is shown;

[0020] Figure 3 Shows Figure 2 Schematic diagram of the structure of the back contact battery isolation paper shown;

[0021] Figure 4 A schematic structural diagram of another embodiment of a battery cell loading mechanism according to the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 1. Paper body; 11. Edge pressure relief hole; 12. Middle pressure relief hole;

[0024] 2. Cell feeding mechanism; 21. Support platform; 22. Feeding box; 221. Bottom plate; 222. Side panel; 223. Material holding chamber; 23. Air blowing component; 24. Opposite photoelectric component; 241. Transmitting part; 242. Receiving part; 25. Driving part; 26. Mounting plate. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] like Figures 1 to 3 As shown, the present invention provides a back-contact battery separator paper, which includes a paper body 1 , and edge pressure relief holes 11 are opened at the outer periphery of the paper body 1 .

[0027] In this way, the back contact battery separator paper of the present invention can better release the negative pressure between the paper and the battery cell when the battery cell is loaded by setting the edge pressure relief hole 11, effectively solving the negative pressure problem in the process of separating the battery cell from the separator paper, significantly improving the separation efficiency of the battery cell and the separator paper, solving the problem of low separation efficiency of the back contact battery cell and the separator paper in the prior art, reducing the paper carrying rate, reducing the downtime and abnormal processing time of the battery cell loading mechanism, thereby improving the utilization rate and yield of the production line, speeding up the production rhythm, and further improving the production capacity. In addition, the back contact battery separator paper of the present invention not only optimizes the loading process of the battery cell, but also effectively protects the surface of the battery cell and avoids scratches, which has significant benefits in improving the overall performance and reliability of photovoltaic modules.

[0028] The principle of the back contact battery isolation paper of the present invention is to open an edge pressure relief hole 11 on the outer periphery of the paper body 1 to effectively release the negative pressure between the battery cell of the back contact battery and the back contact battery isolation paper, thereby reducing the probability of the battery cell being carried with the isolation paper during the loading process, so that the battery cell loading efficiency is significantly improved, the abnormal downtime of the loading equipment caused by carrying the paper is reduced, and the production yield of the production line is improved.

[0029] like Figures 1 to 3 As shown, the paper body 1 is a rectangular paper surrounded by four outer peripheries, and each outer periphery is provided with an edge pressure relief hole 11; and / or the width dimension of the edge pressure relief hole 11 in the extension direction parallel to the corresponding outer periphery gradually increases in the direction close to the corresponding outer periphery; and / or a plurality of intermediate pressure relief holes 12 are provided in the middle of the paper body 1. In this way, the back contact battery separator paper of the present invention optimizes the layout and size of the edge pressure relief holes 11 and the intermediate pressure relief holes 12, so that when the battery cell is separated from the separator paper, the negative pressure is released more evenly, further improving the separation efficiency of the back contact battery separator paper and the battery cell, reducing the damage to the battery cell caused by the negative pressure, and improving the yield of the battery cell.

[0030] like Figures 1 to 3As shown, the number of edge pressure relief holes 11 at the same outer periphery is one; and / or the number of edge pressure relief holes 11 at the same outer periphery is multiple, and the multiple edge pressure relief holes 11 are spaced apart along the extension direction of the corresponding outer periphery, which can effectively reduce the adhesion between the battery cell and the isolation paper under different production conditions and battery cell sizes, achieve the best negative pressure release effect, improve the flexibility and adaptability of feeding, and ensure the high efficiency and stability of battery cell feeding.

[0031] Optionally, the edge pressure relief hole 11 is a semicircular hole; and / or the edge pressure relief hole 11 is a polygonal hole. In this way, by changing the shape of the edge pressure relief hole 11, the path and effect of negative pressure release are optimized, the negative pressure between the battery cell and the isolation paper can be more effectively destroyed, the probability of the battery cell being attached to the isolation paper is reduced, the separation efficiency of the battery cell and the isolation paper is improved, and the yield and efficiency of feeding are improved.

[0032] like Figure 4 As shown, the present invention also provides a battery cell feeding mechanism 2, which is suitable for the above-mentioned back-contact battery isolation paper, and the battery cell feeding mechanism 2 includes: a support platform 21; a feeding box 22, the feeding box 22 is arranged on the support platform 21, and the feeding box 22 includes a bottom plate 221 and a plurality of side panels 222 arranged at intervals around the circumference of the bottom plate 221 to jointly form a material containing cavity 223; a blowing component 23, the blowing component 23 is arranged on the support platform 21 and located on the circumference of the feeding box 22, and the blowing component 23 is arranged toward the material containing cavity 223, so as to blow air to the edge pressure reducing holes 11 of the back-contact battery isolation paper located in the material containing cavity 223, so as to pre-separate the back-contact battery isolation paper.

[0033] In this way, the present invention, by setting a cell feeding mechanism 2 that cooperates with the back contact battery isolation paper, is conducive to breaking the negative pressure "chain" between the cell and the isolation paper, significantly improving the separation efficiency and yield between the back contact battery isolation paper and the cell, and can separate the negative pressure between the cell and the isolation paper to prevent the problem of frequent cell carrying isolation paper caused by excessive negative pressure, thereby reducing the paper carrying rate, facilitating cell feeding, reducing equipment downtime and abnormal processing time caused by carrying paper, reducing equipment downtime, enhancing production rhythm, increasing design utilization rate, and ultimately achieving a dual improvement in production capacity and quality. It is of great significance for the efficient and safe feeding of back contact cells, and is a key link that urgently needs to be solved in the photovoltaic module manufacturing process.

[0034] The principle of the cell feeding mechanism 2 of the present invention is to use the airflow generated by the blowing component 23 to pass through the edge pressure relief hole 11 to destroy the negative pressure between the cell and the back contact cell isolation paper, thereby achieving pre-separation, so that the separation rate of the cell and the back contact cell isolation paper is significantly improved, reducing the abnormal downtime of the equipment caused by the paper, and improving the production yield of the production line. In addition, the cell feeding mechanism 2 can pre-separate the back contact cell isolation paper and the cell by blowing air, effectively preventing the cell from being scratched, ensuring the integrity and cleanliness of the cell surface, thereby improving the overall performance and reliability of the photovoltaic module.

[0035] like Figure 4 As shown, the bottom plate 221 is a rectangular plate body, and the loading box 22 includes eight side panels 222 arranged at intervals. The eight side panels 222 are arranged in groups of two and one by one on the four sides of the bottom plate 221, and the blowing component 23 is located between two side panels 222 arranged in groups.

[0036] The battery cell feeding mechanism 2 of the present invention optimizes the structure of the feeding box 22 to ensure that the blowing component 23 can be accurately aligned with the edge pressure reducing hole 11, thereby improving the efficiency and accuracy of pre-separation. During the pre-separation process, the blowing component 23 can more effectively destroy the negative pressure between the battery cell and the back contact battery isolation paper, thereby reducing the probability of the battery cell carrying the isolation paper and improving the yield and efficiency of feeding.

[0037] like Figure 4 As shown, the loading box 22 is a rectangular parallelepiped structure; wherein, the number of the blowing components 23 is one; or the number of the blowing components 23 is two, and the two blowing components 23 are arranged at intervals on the opposite sides of the loading box 22 along the first direction; or the number of the blowing components 23 is three, and the three blowing components 23 are arranged one-to-one on three of the four sides of the loading box 22; or the number of the blowing components 23 is four, and the four blowing components 23 are arranged one-to-one on the four sides of the loading box 22. In this way, by adjusting the number and position of the blowing components 23, the best pre-separation effect can be achieved under different production conditions. The implementation effect is manifested in that under different production beats and battery cell sizes, the adhesion between the battery cell and the isolation paper can be effectively reduced, and the flexibility and adaptability of loading are improved.

[0038] like Figure 4 As shown, the blowing component 23 includes an air knife; and / or the cell feeding mechanism 2 includes a mounting plate 26, the mounting plate 26 is arranged on one side of the support platform 21, and the blowing component 23 is mounted on the mounting plate 26. In this way, the cell feeding mechanism 2 of the present invention improves the accuracy and stability of pre-separation by using an air knife as the blowing component 23 or by setting the mounting plate 26.

[0039] like Figure 4As shown, the cell loading assembly includes a photoelectric component 24, which includes a transmitting portion 241 and a receiving portion 242. The transmitting portion 241 and the receiving portion 242 are spaced apart along a first direction on opposite sides of the loading box 22 to detect the height of the material in the material holding cavity 223.

[0040] The cell feeding mechanism 2 of the present invention utilizes the photoelectric component 24 to detect the height of the material, thereby realizing real-time monitoring and control of the feeding process. During the feeding process, the separation state of the cell and the isolation paper is judged by utilizing the signal transmission result of the photoelectric component. The incomplete separation of the cell and the isolation paper can be discovered and handled in time, thereby ensuring that the isolation paper and the cell are fully separated, helping to improve the separation rate, completing the cell feeding, reducing the abnormal downtime of the cell feeding mechanism 2 due to the paper, and improving the production yield of the production line.

[0041] like Figure 4 As shown, the cell loading assembly includes a driving unit 25, and the driving unit 25 is connected to the support table 21 to drive the support table 21 to move. In this way, the cell loading mechanism 2 of the present invention realizes automatic loading and positioning of the loading box 22 by setting the driving unit 25, improves the automation and accuracy of loading, and during the loading process, the driving unit 25 can accurately control the movement of the loading box 22, reduces the damage of the cell caused by inaccurate positioning, and improves the yield and efficiency of loading.

[0042] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0043] The back contact battery separator paper of the present invention comprises a paper body 1, and an edge pressure relief hole 11 is provided at the outer periphery of the paper body 1. In this way, the back contact battery separator paper of the present invention can better release the negative pressure between the paper and the battery cell when the battery cell is loaded by setting the edge pressure relief hole 11, effectively solving the negative pressure problem in the process of separating the battery cell from the separator paper, significantly improving the separation efficiency of the battery cell and the separator paper, solving the problem of low separation efficiency of the back contact battery cell and the separator paper in the prior art, reducing the paper carrying rate, reducing the downtime and abnormal processing time of the battery cell loading mechanism, thereby improving the utilization rate and yield of the production line, speeding up the production rhythm, and further improving the production capacity. In addition, the back contact battery separator paper of the present invention not only optimizes the loading process of the battery cell, but also effectively protects the surface of the battery cell and avoids scratches, which has significant benefits in improving the overall performance and reliability of photovoltaic modules.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0046] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A back contact battery separator paper, characterized in that: The back contact battery isolation paper comprises a paper body (1), and edge pressure relief holes (11) are provided at the outer periphery of the paper body (1).

2. The back contact battery separator paper according to claim 1, characterized in that: The paper body (1) is a rectangular paper surrounded by four outer peripheries, and each of the outer peripheries is provided with an edge pressure relief hole (11); and / or The width dimension of the edge pressure relief hole (11) in the extension direction parallel to the corresponding outer periphery gradually increases in the direction approaching the corresponding outer periphery; and / or A plurality of intermediate pressure reducing holes (12) are provided in the middle of the paper body (1).

3. The back contact battery separator paper according to claim 1, characterized in that: The number of the edge pressure relief hole (11) at the same outer periphery is one; and / or The number of the edge pressure relief holes (11) at the same outer periphery is multiple, and the multiple edge pressure relief holes (11) are arranged at intervals along the extension direction of the corresponding outer periphery.

4. The back contact battery separator paper according to claim 1, characterized in that: The edge pressure relief hole (11) is a semicircular hole; and / or The edge pressure relief hole (11) is a polygonal hole.

5. A battery cell feeding mechanism, characterized in that: The back contact battery separator paper applicable to any one of claims 1 to 4, wherein the battery sheet feeding mechanism comprises: Support platform (21); A loading box (22), the loading box (22) being arranged on the support platform (21), the loading box (22) comprising a bottom plate (221) and a plurality of side panels (222) arranged at intervals around the bottom plate (221) to jointly form a material containing cavity (223); A blowing component (23), wherein the blowing component (23) is arranged on the support platform (21) and is located on the peripheral side of the loading box (22), and the blowing component (23) is arranged toward the material containing chamber (223) to blow air toward the edge pressure relief hole (11) of the back contact battery isolation paper located in the material containing chamber (223) to pre-separate the back contact battery isolation paper.

6. The battery cell feeding mechanism according to claim 5, characterized in that: The bottom plate (221) is a rectangular plate body, the loading box (22) comprises eight side panels (222) arranged at intervals, the eight side panels (222) are arranged in groups of two and one-to-one on four sides of the bottom plate (221), and the blowing component (23) is located between two of the side panels (222) arranged in a group.

7. The battery cell feeding mechanism according to claim 5, characterized in that: The loading box (22) is a rectangular parallelepiped structure; wherein: The number of the blowing component (23) is one; or The number of the blowing components (23) is two, and the two blowing components (23) are arranged at intervals on opposite sides of the loading box (22) along the first direction; or The number of the blowing components (23) is three, and the three blowing components (23) are arranged on three of the four sides of the loading box (22) in a one-to-one correspondence; or The number of the blowing components (23) is four, and the four blowing components (23) are arranged on four sides of the loading box (22) in a one-to-one correspondence.

8. The battery cell feeding mechanism according to claim 5, characterized in that: The blowing component (23) comprises an air knife; and / or The battery cell loading mechanism comprises a mounting plate (26), the mounting plate (26) being arranged on one side of the support platform (21), and the blowing component (23) being mounted on the mounting plate (26).

9. The battery cell feeding mechanism according to claim 5, characterized in that: The cell loading assembly comprises a photoelectric component (24), the photoelectric component (24) comprising a transmitting part (241) and a receiving part (242), the transmitting part (241) and the receiving part (242) being arranged at intervals along a first direction on opposite sides of the loading box (22) for detecting the height of the material in the material containing cavity (223).

10. The battery cell feeding mechanism according to claim 5, characterized in that: The battery cell loading assembly comprises a driving unit (25), and the driving unit (25) is drivingly connected to the support platform (21) to drive the support platform (21) to move.

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