A battery cell carrier device and PVD coating equipment

Abstract

This utility model provides a battery cell carrier device and a PVD coating equipment, relating to the field of coating technology. The battery cell carrier device includes a carrier body, a support structure, and a driving component. The carrier body carries the battery cells. The support structure is disposed on the carrier body and includes multiple support members, the positions of which correspond to the edges of the battery cells. The driving component is connected to the support structure and drives the multiple support members to move alternately, so that each support member contacts the edge of the battery cell. The battery cells are placed on the carrier body and supported by the support structure, which includes multiple support members. These support members can move alternately under the drive of the driving component, thereby contacting the edges of the battery cells. This reduces the contact area between the support members and the edges of the battery cells, increases the coating area, and thus ensures the conductivity of the battery cells and guarantees battery quality.

Description

Technical Field

[0001] This utility model relates to the field of coating technology, and more specifically, to a battery cell carrier device and a PVD coating equipment. Background Technology

[0002] Currently, heterojunction solar cells require the deposition of a Tocopheryl Oxide (TCO) film during the PVD process. The main functions of the TCO film in heterojunction solar cells include: light transmission and conductivity, achieving conductivity while ensuring high light transmittance, reducing light absorption loss and transporting charge carriers, and lowering series resistance; protecting the amorphous silicon layer; and lateral current transport, uniformly collecting charge carriers through the lateral conductivity of the TCO film, optimizing current distribution, and reducing cell efficiency loss. Existing technologies introduce full-coverage edge-etching technology for film deposition. The PVD substrate contacts the solar cell via bosses, and then the non-boob areas at the edge of the solar cell, including the N-side, P-side, and sides, are covered with a comprehensive TCO film.

[0003] Existing solar cell technologies suffer from insufficient TCO film coverage during the coating process, which affects the quality of subsequent cells. Utility Model Content

[0004] This invention provides a battery cell carrier device and a PVD coating equipment, which can increase the coverage area of ​​the TCO film on the battery cell, ensure the conductivity of the battery cell, and ensure battery quality.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a battery cell carrier device, which includes:

[0007] A carrier plate body, which is used to support the battery cells;

[0008] A support structure is disposed on the carrier plate body, and the support structure includes multiple support members, the positions of which correspond to the edge positions of the battery cells.

[0009] A driving component, which is connected to the support structure, is used to drive the plurality of support components to move alternately, so that the plurality of support components contact the edge of the battery cell respectively.

[0010] Optionally, the support member includes a transmission member and a support plate. The transmission member is connected to the driving member and the support plate. The transmission member is used to drive the support plate to move under the drive of the driving member, so that the support plate and the edge of the battery cell come into contact or separate.

[0011] Optionally, the transmission component includes a transmission gear and a rotating shaft. The transmission gear is connected to both the driving component and the rotating shaft. The rotating shaft is connected to the support plate and is used to drive the support plate to rotate.

[0012] Optionally, the transmission gear includes a primary gear and a secondary gear that mesh with each other, the primary gear being connected to the driving component, and the secondary gear being connected to the rotating shaft.

[0013] Optionally, there are two supports, which are arranged adjacent to each other. The two supports are used to move alternately under the drive of the drive member, so as to contact the edge of the battery cell respectively.

[0014] Optionally, the carrier plate body includes multiple receiving slots, each receiving slot carries a battery cell, and each receiving slot is provided with the support structure.

[0015] Optionally, at least one support structure is provided around the accommodating groove.

[0016] Optionally, the receiving groove has a rectangular structure.

[0017] Optionally, the long side of the receiving groove is provided with two support structures, and the short side of the receiving groove is provided with one support structure.

[0018] An embodiment of this utility model also provides a PVD coating device, including a device body and a battery cell carrier plate device.

[0019] The beneficial effects of the battery cell carrier device and PVD coating equipment of this utility model embodiment include, for example:

[0020] The solar cell carrier assembly includes a carrier body, a support structure, and a driving component. The carrier body supports the solar cells. The support structure is disposed on the carrier body and includes multiple support members, the positions of which correspond to the edges of the solar cells. The driving component is connected to the support structure and drives the multiple support members to move alternately, so that each support member contacts the edge of the solar cell. During coating, the solar cells are placed on the carrier body and supported by the support structure, which includes multiple support members. These support members can move alternately under the drive of the driving component, thereby contacting the edges of the solar cells. This reduces the contact area between the support members and the edges of the solar cells, increases the coating area, and thus ensures the conductivity of the solar cells and guarantees battery quality.

[0021] This PVD coating equipment includes a main body and a solar cell carrier plate assembly. During coating, the solar cells are placed on the carrier plate and supported by a support structure. The support structure includes multiple support members, which can move alternately under the drive of a driving component, thereby contacting the edges of the solar cells individually. This reduces the contact area between the support members and the edges of the solar cells, increases the coating area, and ensures the conductivity of the solar cells, thus guaranteeing battery quality. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first-view structural schematic diagram of the battery cell carrier device provided in this embodiment;

[0024] Figure 2 for Figure 1 Sectional view of AA;

[0025] Figure 3 This is a structural schematic diagram of the battery cell carrier device provided in this embodiment from a second perspective.

[0026] Icons: 10-Carrier plate body; 20-Support structure; 21-Support component; 211-Rotating shaft; 212-Support plate; 101-Battery cell; 100-Battery cell carrier plate device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0033] Currently, heterojunction solar cells require the deposition of a Tocopheryl Oxide (TCO) film during the PVD process. The main functions of the TCO film in heterojunction solar cells include: light transmission and conductivity, achieving conductivity while ensuring high light transmittance, reducing light absorption loss and transporting charge carriers, and lowering series resistance; protecting the amorphous silicon layer; and lateral current transport, uniformly collecting charge carriers through the lateral conductivity of the TCO film, optimizing current distribution, and reducing cell efficiency loss. Existing technologies introduce full-coverage edge-etching technology for film deposition. The PVD substrate contacts the solar cell via bosses, and then the non-boob areas at the edge of the solar cell, including the N-side, P-side, and sides, are covered with a comprehensive TCO film.

[0034] In related technologies, solar cells suffer from insufficient TCO film coverage during the coating process, which affects the quality of subsequent cells.

[0035] Please refer to Figures 1-3 This embodiment provides a PVD coating apparatus, including an apparatus body and a solar cell carrier device 100. The PVD coating apparatus can effectively improve the aforementioned technical problems, increase the coverage area of ​​the TCO film on the solar cell 101, ensure the conductivity of the solar cell 101, and ensure battery quality.

[0036] The solar cell carrier device 100 includes a carrier body 10, a support structure 20, and a driving member. The carrier body 10 is used to carry solar cells 101. The support structure 20 is disposed on the carrier body 10 and includes a plurality of support members 21. The positions of the plurality of support members 21 correspond to the edge positions of the solar cells 101. The driving member is connected to the support structure 20 and is used to drive the plurality of support members 21 to move alternately, so that the plurality of support members 21 contact the edge positions of the solar cells 101 respectively.

[0037] It should be noted that in the existing full-coating edge-marking technology, the solar cell 101 is contacted by bosses on the PVD carrier. Then, a comprehensive TCO film is applied to the non-bore areas of the solar cell 101's edge, including the N-side, P-side, and sides of the solar cell 101. Multiple bosses are arranged sequentially and spaced along the axial direction of the carrier. To prevent wafer loss during PVD processing, the width of the bosses is widened. This results in some boss areas of the solar cell 101 after full-coating edge-marking not being covered by the TCO layer. Since these boss areas are located at the edge of the solar cell 101, the TCO film cannot be covered at the edge, preventing the grid lines from extending outwards and thus avoiding grid breakage. To address this technical problem, this embodiment provides a battery cell carrier plate device 100, which places the battery cell 101 on the carrier plate body 10 and supports it through a support structure 20. The support structure 20 includes multiple support members 21, which can move alternately under the drive of a driving member, thereby contacting the edge position of the battery cell 101 respectively. This reduces the contact area between the support member 21 and the edge position of the battery cell 101, increases the coating area, and thus ensures the conductivity of the battery cell 101 and ensures battery quality.

[0038] In this embodiment, the support member 21 includes a transmission member and a support plate 212. The transmission member is connected to a drive member and also to the support plate 212. The transmission member is used to drive the support plate 212 to move under the drive of the drive member, so that the support plate 212 contacts or separates from the edge of the battery cell 101. The transmission member includes a transmission gear and a rotating shaft 211. The transmission gear is connected to both the drive member and the rotating shaft 211. The rotating shaft 211 is connected to the support plate 212 and is used to drive the support plate 212 to rotate.

[0039] During operation, the drive unit drives the transmission gear to rotate clockwise, thereby causing the rotating shaft 211 to rotate. The support plate 212 rotates around the axis of the rotating shaft 211, thus contacting the bottom edge of the battery cell 101 for support. The drive unit drives the transmission gear to rotate counterclockwise, thereby causing the rotating shaft 211 to rotate. The support plate 212 rotates around the axis of the rotating shaft 211, thus separating from the bottom edge of the battery cell 101.

[0040] In other embodiments, the driving member can also drive the transmission gear to rotate counterclockwise, thereby causing the rotating shaft 211 to rotate. The support plate 212 rotates around the axis of the rotating shaft 211 to contact the bottom edge of the battery cell 101 for support. Alternatively, the driving member can drive the transmission gear to rotate clockwise, thereby causing the rotating shaft 211 to rotate. The support plate 212 rotates around the axis of the rotating shaft 211 to separate from the bottom edge of the battery cell 101. No specific limitations are specified here.

[0041] It should be noted that the transmission gear includes a main gear and a secondary gear that mesh with each other. The main gear is connected to the driving component, and the secondary gear is connected to the rotating shaft 211.

[0042] In this embodiment, the driving component can be a motor. The motor is connected to the main gear, thereby driving the main gear to rotate.

[0043] It should also be noted that there are two support members 21, which are arranged adjacent to each other. The two support members 21 are used to move alternately under the drive of the driving member, thereby contacting the edge of the battery cell 101 respectively. Specifically, the two support members 21 are the first support member 21 and the second support member 21. When the driving member drives the first support member 21 to support the battery cell 101, the second support member 21 and the battery cell 101 are in a separate state. When the driving member drives the second support member 21 to support the battery cell 101, the first support member 21 and the battery cell 101 are in a separate state.

[0044] Specifically, the two support members 21 are driven individually by two separate motors. Alternatively, the two support members 21 can be driven together by a single motor. No specific limitation is made here.

[0045] Furthermore, the carrier plate body 10 includes multiple receiving slots, each receiving slot carries a battery cell 101, each receiving slot is provided with a support structure 20, and at least one support structure 20 is provided around the receiving slot.

[0046] In this embodiment, the receiving groove is a rectangular structure, with two support structures 20 on the long side and one support structure 20 on the short side.

[0047] During operation, after the carrier plate body 10 carrying the battery cell 101 enters the PVD cavity, the driving component drives the first support plate 212 to contact the battery cell 101 for 10 seconds. At this time, the second support plate 212 is in a vertical non-contact state. Then, the driving component drives the second support plate 212 to contact the battery cell 101 and drives the first support plate 212 to move away from the battery cell 101. The above operation is repeated.

[0048] The battery cell carrier device 100 and PVD coating equipment provided in this embodiment have at least the following advantages:

[0049] In existing full-coating edge-marking technology, bosses are used to contact the solar cell 101 on a PVD carrier. A TCO film is then applied to the non-boob areas of the solar cell 101, including the N-side, P-side, and sides. Multiple bosses are spaced along the axial direction of the carrier, and their width is widened to prevent wafer loss during PVD processing. This results in some boss areas of the solar cell 101 remaining uncovered after full-coating edge-marking. To address this issue, this embodiment provides a solar cell carrier device 100. The solar cell 101 is placed on a carrier body 10 and supported by a support structure 20. The support structure 20 includes multiple support members 21, which can move alternately under the drive of a driving member, contacting the edges of the solar cell 101. This reduces the contact area between the support members 21 and the edges of the solar cell 101, increasing the coating area and ensuring the conductivity of the solar cell 101, thus guaranteeing battery quality.

[0050] In this embodiment, the two support plates 212 of the cell carrier device 100 can alternately support the edge positions of the cell 101. A TCO film is deposited on the cell 101 at positions corresponding to the two support plates 212. This TCO film has a relatively small thickness; a thinner film has higher light transmittance and a certain degree of conductivity, which can reduce light absorption loss and transport charge carriers, thus lowering the series resistance. Furthermore, the thinned film also protects the amorphous silicon layer, acting as a protective layer to prevent damage to the hydrogenated amorphous silicon (a-Si:H) passivation layer by subsequent metal electrode fabrication processes (such as screen printing, sputtering, and copper plating). The thinned film also has a certain lateral current transport capability, which can collect charge carriers, optimize current distribution, and reduce cell efficiency loss.

[0051] In summary, this utility model provides a battery cell carrier device 100 and a PVD coating equipment. The battery cell carrier device 100 includes a carrier body 10, a support structure 20, and a driving component. The carrier body 10 is used to support the battery cell 101. The support structure 20 is disposed on the carrier body 10 and includes a plurality of support members 21. The positions of the plurality of support members 21 correspond to the edge positions of the battery cell 101. The driving component is connected to the support structure 20 and is used to drive the plurality of support members 21 to move alternately, so that the plurality of support members 21 contact the edge positions of the battery cell 101 respectively. During the coating process, the battery cell 101 is placed on the carrier plate body 10 and supported by the support structure 20. The support structure 20 includes multiple support members 21, which can move alternately under the drive of the drive member, thereby contacting the edge position of the battery cell 101 respectively. This reduces the contact area between the support member 21 and the edge position of the battery cell 101, increases the coating area, and ensures the conductivity of the battery cell 101, thus ensuring battery quality.

[0052] The PVD coating equipment includes a main body and a solar cell carrier plate device 100. During coating, the solar cell 101 is placed on the carrier plate body 10 and supported by a support structure 20. The support structure 20 includes multiple support members 21, which can move alternately under the drive of a drive member, thereby contacting the edge of the solar cell 101. This reduces the contact area between the support members 21 and the edge of the solar cell 101, increases the coating area, and ensures the conductivity of the solar cell 101, thus ensuring the quality of the battery.

[0053] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A battery cell carrier device, characterized in that, include: Carrier plate body (10), the carrier plate body (10) is used to carry the battery cell (101); A support structure (20) is disposed on the carrier plate body (10). The support structure (20) includes a plurality of support members (21), the positions of which correspond to the edge positions of the battery cell (101). A driving member is connected to the support structure (20) and is used to drive the plurality of support members (21) to move alternately, so that the plurality of support members (21) respectively contact the edge position of the battery cell (101).

2. The cell carrier apparatus of claim 1, wherein, The support member (21) includes a transmission member and a support plate (212). The transmission member is connected to the driving member and the support plate (212). The transmission member is used to drive the support plate (212) to move under the drive of the driving member, so that the support plate (212) and the edge of the battery cell (101) come into contact or separate.

3. The cell carrier apparatus of claim 2, wherein, The transmission component includes a transmission gear and a rotating shaft (211). The transmission gear is connected to both the driving component and the rotating shaft (211). The rotating shaft (211) is connected to the support plate (212) and is used to drive the support plate (212) to rotate.

4. The cell carrier apparatus of claim 3, wherein, The transmission gear includes a main gear and a secondary gear that mesh with each other. The main gear is connected to the driving component, and the secondary gear is connected to the rotating shaft (211).

5. The cell carrier apparatus of claim 1, wherein, The number of the support members (21) is two, and the two support members (21) are arranged adjacent to each other. The two support members (21) are used to move alternately under the drive of the drive member, so as to contact the edge position of the battery cell (101) respectively.

6. The cell carrier apparatus of claim 1, wherein, The carrier plate body (10) includes multiple receiving slots, each receiving slot carries a battery cell (101), and each receiving slot is provided with the support structure (20).

7. The cell carrier apparatus of claim 6, wherein, At least one support structure (20) is provided around the accommodating groove.

8. The cell carrier apparatus of claim 7, wherein, The receiving slot has a rectangular structure.

9. The cell carrier apparatus of claim 8, wherein, The long side of the receiving groove is provided with two support structures (20), and the short side of the receiving groove is provided with one support structure (20).

10. A PVD coating installation, characterized in that It includes the device body and the battery cell carrier assembly (100) as described in any one of claims 1-9.

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