Passivation device

Abstract

The utility model provides a passivation device, which belongs to the technical field of passivation equipment, is used for passivating a to-be-passivated surface of a battery piece, and comprises a shell and a small boat positioned in the shell, the containing cavity is used for containing a battery piece, the containing cavity is at least provided with a passivation opening, the passivation opening and the passivation channel are correspondingly configured, and each passivation opening faces and is close to the passivation channel, so that the passivation airflow acts on the to-be-passivated face of the battery piece; wherein the plurality of small boats are arranged, and the plurality of small boats are combined to form a small boat cluster or a plurality of small boat clusters which are arranged at intervals; the surfaces, not provided with the passivation openings, of the small boats are defined as closing surfaces, and the small boats in each small boat cluster are closed together through the closing surfaces; and the technical effect of saving the consumption of passivation airflow is achieved.

Description

Technical Field

[0001] This utility model relates to the field of passivation equipment technology, and in particular to a passivation device. Background Technology

[0002] When manufacturing solar cells using TOPcon, BC, or heterojunction technologies, the cells are cut into 2-3 segments before assembly to reduce the internal resistance of each segment and improve the overall module efficiency. Specifically, in half-cell module solutions, the cut surfaces (the surfaces to be passivated) of the solar cells need to be passivated to prevent electrons from the PN junction region from transitioning to the cut surface and forming charge carriers, thus reducing power generation efficiency.

[0003] The specific passivation reaction involves alternating the introduction of Al sources such as TMA and O sources (H2O to ozone) into the channel to form an ALD reaction, or simultaneously introducing them to form a CVD reaction, in order to produce an Al2O3 passivation layer. Current passivation devices do not yet incorporate the concept of conserving passivation gas flow. During the passivation reaction, to ensure that all solar cells within the device can undergo passivation, the introduced passivation gas flow must fill the entire passivation space to ensure sufficient contact between the gas flow and the passivation surface of the solar cells. Therefore, a significant amount of passivation gas flow does not participate in the reaction.

[0004] Based on the above viewpoints, the applicant designed a face-to-face passivation device to control the flow direction of the passivation airflow and reduce the volume of the passivation channel. In this application, the applicant further optimized the passivation form of the passivation device to improve the patent layout.

[0005] Therefore, the technical problem with existing technologies lies in how to conserve the amount of passivation airflow. Summary of the Invention

[0006] This application provides a passivation device that solves the technical problem of how to improve the passivation uniformity of battery cells in the prior art, and achieves the technical effect of saving passivation airflow.

[0007] This application provides a passivation device that uses a passivation airflow to passivate the surface of a battery cell to be passivated. The passivation device includes: a housing with a working space inside; an air intake assembly disposed on the housing and communicating with the working space; an air extraction assembly disposed on the housing and communicating with the working space, wherein the path of the passivation airflow from the air intake assembly to the air extraction assembly forms a passivation channel; and a small boat disposed in the working space, the small boat including a container. The cavity is used to house the battery cell, and the cavity has at least one passivation opening. The passivation opening and the passivation channel are configured correspondingly. Each passivation opening faces and is close to the passivation channel so that the passivation airflow acts on the passivation surface of the battery cell. Several small boats are provided, and the small boats are combined to form a small boat cluster or a cluster of small boats arranged at intervals. The surface of the small boat without the passivation opening is defined as the approaching surface. The small boats in each small boat cluster approach each other through the approaching surface.

[0008] Preferably, the passivation openings of the small boats are all exposed in a cluster of small boats.

[0009] Preferably, the passivation channel is located on the outside of the small boat cluster, and adjacent passivation openings between adjacent small boat clusters share a single passivation channel.

[0010] Preferably, the small boat is provided with one or more of the passivation openings. When there is one passivation opening, the two small boats approach each other with the passivation openings facing back to back. When there are two passivation openings and the two passivation openings are arranged opposite each other, the small boats are spaced apart along the axial direction of the two passivation openings.

[0011] Preferably, the small boat is positioned in the middle of the workspace, such that the passivation channel is located between the inner wall of the housing and the small boat.

[0012] Preferably, the air intake assembly includes: an air intake pipe for inputting a passivating airflow; and an air intake plate located between the air intake pipe and the small boat, wherein the air intake plate receives the passivating airflow output from the air intake pipe and controls the output direction of the passivating airflow.

[0013] Preferably, the air intake plate is located above the small boat, and the forward projection of the air intake plate toward the small boat covers the area outside the passivation opening, so that the passivation airflow acts on the surface to be passivated in the direction of movement.

[0014] Preferably, the air intake plate is provided with a guide plate, which is located between the air intake pipe and the air intake plate, and the guide plate guides the passivation airflow to move to the initial position in the passivation channel so that the passivation channel is a straight path.

[0015] Preferably, the air extraction assembly includes: an air extraction pipe for outputting a passivation airflow; and an air extraction plate disposed in the working space and between the boat and the air extraction pipe, thereby maintaining a distance between the boat and the shell, and receiving the passivation airflow output from the passivation channel.

[0016] Preferably, the passivation channel further includes a boat support, which is disposed within the workspace and defines the position of the small boat; the boat support enables several small boats to enter and exit the workspace simultaneously.

[0017] Preferably, the boat support is provided with a force-bearing part for receiving transport, the force-bearing part is located between the inner wall of the small boat and the shell, and the force-bearing part and the passivated opening of the small boat are staggered.

[0018] The above-described one or more technical solutions in the embodiments of this application have at least one or more of the following technical effects:

[0019] 1. In this application, by constructing small boats into a cluster of small boats, the surfaces of the small boats that do not need to be passivated are gathered together, reducing the space required for the passivation airflow. This is beneficial for reducing the volume of the workspace or setting up more small boats, thereby reducing the overall amount of passivation airflow used. Furthermore, the passivation airflow is concentrated and flows through the passivation openings that need to be passivated, thus solving the technical problem of how to save the amount of passivation airflow in the prior art and achieving the technical effect of saving the amount of passivation airflow used. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main view cross-sectional structure of a passivation device in this application;

[0021] Figure 2 This is a schematic diagram of the main view structure of the small boat cluster in this application;

[0022] Figure 3 This is a top-view structural diagram illustrating the arrangement of the small boat cluster in this application;

[0023] Figure 4 This is a top-view structural diagram of another arrangement of the small boat cluster in this application.

[0024] Figure 5 for Figure 1 A schematic diagram showing the positional relationship between the small boat and its support;

[0025] Figure 6 This is a schematic diagram of the main view cross-sectional structure of the passivation device for changing the air intake method in this application;

[0026] Figure 7 This is a schematic diagram of the main view cross-sectional structure of the passivation device for changing the type of small boat in this application;

[0027] Figure 8 This is a schematic diagram of the main view sectional structure of the multiple boat combinations in this application;

[0028] Figure 9 This is a schematic diagram of the main view section structure of the multiple groups of boats with different types in this application.

[0029] Reference numerals: W, battery cell; WC, surface to be passivated; 100, casing; 11, passivation channel; 200, air intake assembly; 21, air intake pipe; 22, air intake plate; 221, guide plate; 300, air extraction assembly; 31, air extraction pipe; 32, air extraction plate; 400, small boat; 41, accommodating cavity; 42, passivation opening; 42a, first passivation opening; 42b, second passivation opening; 43, approaching surface; 500, boat support; 600, small boat cluster. Detailed Implementation

[0030] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely for the convenience of describing this application and simplifying the description. They 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 application.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0033] A passivation device, reference Figure 1 The passivation device uses a passivation airflow to passivate the surface WC of the battery cell W. The passivation device includes a housing 100, an air intake assembly 200, an air extraction assembly 300, and a small boat 400. Specifically, the air intake assembly 200 and the air extraction assembly 300 are disposed on the housing 100. The path of the passivation airflow from the air intake assembly 200 to the air extraction assembly 300 forms a passivation channel 11. The small boat 400 houses the battery cell W to be passivated and is located inside the housing 100. Under the action of the air intake assembly 200 and the air extraction assembly 300, the passivation airflow flows along the passivation channel 11 through the passivation opening 42 of the small boat 400, so that the surface WC of the battery cell W to be passivated located at the passivation opening 42 is passivated. It should be noted that, in order to save on the amount of passivation gas, the small boats 400 are assembled into a small boat cluster 600. While ensuring that the passivation openings 42 of the small boats 400 are exposed, the small boats 400 are grouped together as close as possible to reduce the flow of passivation gas to areas that do not need passivation. In other words, in the mode of the small boat cluster 600, the passivation gas only passes through the outer surface of the small boat cluster 600 and does not pass through the interior of the small boat cluster 600. Therefore, the space required for the passivation gas to fill the shell 100 is small. Moreover, the passivation gas flows through the passivation openings 42 on the small boats 400, so that after entering the shell 100, the passivation gas does not react with the passivation surface WC of the battery cell W, regardless of which direction it moves, thus improving the actual utilization rate of the passivation gas.

[0034] Housing 100, Reference Figure 1 The interior of the housing 100 has a working space for accommodating the boat 400 and the passivation airflow. The size of the working space is preferably determined by calculating the space required for the passivation channel 11 after determining the arrangement of the boat 400, and finally determining the working space size with a suitable arrangement of the boat 400 and a suitable space for the passivation channel 11.

[0035] Intake assembly 200, reference Figure 1 The intake assembly 200 is mounted on the housing 100 and communicates with the working space for inputting passivation airflow into the working space. It should be noted that the airflow distribution method of the intake assembly 200 to the boat 400 can be vertical distribution. The passivation airflow first flows within the intake assembly 200 to above each passivation channel 11, and then moves downwards, in order to construct vertical passivation channels 11, allowing the passivation airflow to move directly from top to bottom and pass through the passivation opening 42 of the boat 400. Additionally, refer to... Figure 6The air distribution method can also be a center diffusion air distribution, where the passivation airflow is first output from the air intake assembly 200 and then disperses downward and outward from one or more centers above the small boat 400 to construct a passivation channel 11 that is curved at the beginning and vertical in the middle and rear.

[0036] For details regarding the structure of the intake assembly 200, please refer to... Figure 1 The intake assembly 200 includes an intake pipe 21 and an intake plate 22. The intake pipe 21 is used to input the passivation airflow. The intake plate 22 is located between the intake pipe 21 and the small boat 400, and the intake plate 22 receives the passivation airflow output from the intake pipe 21. The output direction of the passivation airflow is controlled by the intake plate 22. When the air distribution mode adopts vertical air distribution, the positive projection of the intake plate 22 toward the small boat 400 covers the area outside the passivation opening 42, so that the passivation airflow acts on the surface WC to be passivated from above the area outside the passivation opening 42 in the direction of movement. Understandably, in order to allow the passivation airflow to move inside the intake plate 22 to above the area outside the predetermined passivation opening 42, a guide plate 221 is provided on the intake plate 22. The guide plate 221 is located between the intake pipe 21 and the intake plate 22 or inside the intake plate 22. The guide plate 221 guides the passivation airflow to the initial position in the passivation channel 11 so that the passivation channel 11 is a straight path, reducing the contact between the passivation airflow and other parts of the boat 400.

[0037] Air extraction component 300, reference Figure 1 An air extraction assembly 300 is mounted on the housing 100 and connects to the working space for extracting the passivation airflow. The air extraction assembly 300 includes an air extraction pipe 31 and an air extraction plate 32. The air extraction pipe 31 is used to output the passivation airflow; the air extraction plate 32 is disposed in the working space and is positioned between the boat 400 and the air extraction pipe 31. The air extraction plate 32 maintains a distance between the boat 400 and the housing 100, and receives the passivation airflow output from the passivation channel 11.

[0038] Xiaozhou 400, for reference Figure 1 The small boat 400 is set in the working space as a receiving fixture for passivating the battery cell W. The small boat 400 is provided with a receiving cavity 41 for receiving the battery cell W, and the receiving cavity 41 is provided with at least one passivation opening 42. The passivation opening 42 is configured correspondingly with the passivation channel 11. Each passivation opening 42 faces and is close to the passivation channel 11, so that the passivation airflow acts on the surface WC of the battery cell W to be passivated.

[0039] To optimize the layout of the small boats 400 and reduce unnecessary space occupation, several small boats 400 in the workspace are combined to form a small boat cluster 600 or several small boat clusters 600 arranged at intervals. Specifically, the small boat clusters 600 are combined as follows: the surface of the small boat 400 without the passivation opening 42 is defined as the converging surface 43, and the small boats 400 in each small boat cluster 600 are brought together by the converging surface 43. It can be understood that the passivation opening 42 of the small boat 400 is exposed in each small boat cluster 600 so that the passivation airflow does not pass through the middle of the small boat cluster 600. The passivation channel 11 is set on the outside of the small boat cluster 600, and adjacent passivation openings 42 between adjacent small boat clusters 600 share a passivation channel 11.

[0040] For details, please refer to Figure 2 , Figure 2 This is a schematic diagram of the main view of the small boat cluster 600. The small boats 400 are stacked using the converging surfaces 43 at both ends, and are placed side-by-side using the converging surfaces 43 opposite to the blunted openings 42. (Reference) Figure 3 , Figure 3 This is a top-down diagram of the small boat cluster 600. Small boats 400 can be arranged in pairs back-to-back to form the cluster 600, or they can be extended from two pairs of back-to-back boats. (Reference) Figure 4 , Figure 4 This is a schematic diagram of another form of small boat cluster 600 in a top-down view. Several small boats 400 are arranged in a circle with the passivation opening 42 facing outwards. The passivation airflow only needs to flow through the outer side of the small boat cluster 600. The middle enclosed part of the small boat cluster 600 can be sealed by a sealing plate. The small boats 400 used for enclosing can be provided with only one passivation opening 42 or multiple passivation openings 42. When there are multiple passivation openings 42, the passivation openings 42 of adjacent small boats 400 can share a passivation channel 11.

[0041] More specifically, when the number of passivation openings 42 is one, refer to Figure 1 Two small boats 400 are positioned back-to-back with passivation openings 42, and are located in the middle of the working space, so that the passivation channel 11 is located between the inner wall of the housing 100 and the small boats 400. When there are two passivation openings 42 and the two passivation openings 42 are arranged opposite each other, refer to... Figure 7 The small boat 400 is spaced apart along the axial direction of the two blunted openings 42. (Reference) Figure 8 In a cluster of 600 small boats, 400 small boats are stacked vertically and placed back-to-back horizontally, with adjacent clusters of 600 small boats spaced apart; (Reference) Figure 9In the small boat cluster 600, the small boats 400 have two relatively blunted openings 42, and the small boats 400 in the small boat cluster 600 are stacked one on top of the other, with adjacent small boats 400 placed at intervals between clusters.

[0042] It should be noted that the reference Figure 5 The passivation channel 11 also includes a boat support 500, which serves as the framework for the small boat cluster 600, allowing the small boat cluster 600 to enter and exit the workspace synchronously. The boat support 500 is positioned within the workspace and defines the position of the small boats 400. It is understood that the boat support 500 is equipped with force-bearing components for receiving and transporting the small boat cluster 600. Figure 3 The arrangement shown has the force-bearing part located between the inner walls of the small boat 400 and the shell 100, and the force-bearing part and the passivated opening 42 of the small boat 400 are offset; if the small boat cluster 600 is as follows Figure 4 As shown, the force-bearing part can be located between the inner walls of the small boat 400 and the shell 100, or it can be located in the middle part of a circle formed by several small boats 400.

[0043] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A passivation device for passivating the surface (WC) of a battery cell (W) to be passivated using a passivation gas flow, characterized in that, The passivation device includes: A housing (100) having a working space inside; An intake assembly (200) is disposed on the housing (100) and communicates with the working space; An extraction assembly (300) is disposed on the housing (100), the extraction assembly (300) communicates with the working space, and the passivation airflow path from the intake assembly (200) to the extraction assembly (300) forms a passivation channel (11); and A small boat (400), the small boat (400) being disposed in the workspace, and the small boat (400) comprising; A receiving cavity (41) is provided for receiving a battery cell (W), and the receiving cavity (41) is provided with at least one passivation opening (42). The passivation opening (42) and the passivation channel (11) are configured accordingly. Each passivation opening (42) faces and is close to the passivation channel (11) so that the passivation airflow acts on the passivation surface (WC) of the battery cell (W). The small boats (400) are arranged in a plurality of ways, and the plurality of small boats (400) are combined to form a small boat cluster (600) or a plurality of small boat clusters (600) arranged at intervals; the surface of the small boat (400) without the passivation opening (42) is defined as the approaching surface (43), and the small boats (400) in each small boat cluster (600) approach each other through the approaching surface (43).

2. The passivation apparatus according to claim 1, characterized in that, The passivation openings (42) of the small boats (400) are all exposed in a cluster of small boats (600).

3. The passivation apparatus according to claim 1, characterized in that, The passivation channel (11) is located on the outside of the small boat cluster (600), and adjacent passivation openings (42) between adjacent small boat clusters (600) share one passivation channel (11).

4. The passivation apparatus according to claim 1, characterized in that, The small boat (400) is provided with one or more of the passivation openings (42). When there is one passivation opening (42), the two small boats (400) are close together in a back-to-back manner with the passivation openings (42) facing each other. When there are two passivation openings (42) and the two passivation openings (42) are arranged opposite each other, the small boats (400) are spaced apart along the axial direction of the two passivation openings (42).

5. The passivation apparatus according to claim 1, characterized in that, The small boat (400) is positioned in the middle of the workspace, such that the passivation channel (11) is located between the inner wall of the housing (100) and the small boat (400).

6. The passivation apparatus according to claim 1, characterized in that, The intake assembly (200) includes: An intake pipe (21) is used to input a passivating airflow; An air intake plate (22) is located between the air intake pipe (21) and the small boat (400), and the air intake plate (22) receives the passivated airflow output by the air intake pipe (21) and controls the output direction of the passivated airflow.

7. The passivation apparatus according to claim 6, characterized in that, The air intake plate (22) is located above the small boat (400), and the positive projection of the air intake plate (22) toward the small boat (400) covers the area outside the passivation opening (42) so that the passivation airflow acts on the surface to be passivated (WC) in the direction of movement.

8. The passivation apparatus according to claim 7, characterized in that, The air intake plate (22) is provided with a guide plate (221), which is located between the air intake pipe (21) and the air intake plate (22). The guide plate (221) guides the passivation airflow to the initial position in the passivation channel (11) so that the passivation channel (11) is a straight path.

9. The passivation apparatus according to claim 1, characterized in that, The air extraction assembly (300) includes: A suction pipe (31) is used to output a passivating airflow; An air extraction plate (32) is disposed in the working space and between the boat (400) and the air extraction pipe (31). The air extraction plate (32) maintains a distance between the boat (400) and the shell (100). The air extraction plate (32) receives the passivation airflow output from the passivation channel (11).

10. The passivation apparatus according to claim 1, characterized in that, The passivation channel (11) also includes: A boat support (500) is provided in the workspace and defines the position of the small boat (400); the boat support (500) enables several small boats (400) to enter and exit the workspace simultaneously.

11. The passivation apparatus according to claim 10, characterized in that, The boat support (500) is provided with a force-bearing part for receiving transport. The force-bearing part is located between the inner wall of the small boat (400) and the shell (100), and the force-bearing part and the passivated opening (42) of the small boat (400) are misaligned.

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