Passivation equipment

Abstract

The utility model belongs to the technical field of battery piece processing, and discloses passivation equipment, which comprises a box body and a flow guide piece, a passivation cavity is arranged in the box body, the box body is provided with an air inlet and an air outlet which are communicated with the passivation cavity, and passivation gas sequentially flows through the air inlet, the passivation cavity and the air outlet. The flow guide part is arranged in the passivation cavity and located on the side, close to the air inlet, of the passivation cavity, at least one first flow guide hole unit and at least one second flow guide hole unit are formed in the flow guide part, and passivation gas flowing through the first flow guide hole unit acts on the to-be-passivated face of the battery piece; and the passivation gas flowing through the second flow guide hole unit acts on other areas of the passivation cavity. According to the passivation equipment disclosed by the utility model, the passivation gas flowing into the passivation cavity is shunted, and gas flows in other areas of the passivation cavity while the surface to be passivated is passivated, so that dust accumulation in the passivation cavity is avoided, and the passivation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery slice processing, in particular to passivation equipment. Background Art

[0002] Solar cells are a green, renewable energy technology that plays a vital role in the current global energy transition. To reduce the production cost of solar cells, the photovoltaic industry continues to move toward larger silicon wafers. The increase in cell size increases the bus resistance at the end of the photovoltaic module, resulting in significant heat loss and impacting the overall efficiency of the module. Existing solutions typically involve cutting the cells into individual slices before grouping to reduce the internal resistance of each wafer. After screen printing, the cells are laser scribed and cut. The laser cutting process often causes severe damage and interface defects on the cut surfaces. These damage and defects become centers for carrier recombination, thereby weakening the cell's power generation performance. Therefore, edge passivation technology is required to repair the cut surfaces to ensure cell performance and efficiency. During the passivation process, the flow and uniformity of the process gas affect the passivation effect. To improve production efficiency, existing passivation equipment typically concentrates the process gas flow near the cut surface. This results in poor uniformity and consistency of the process gas flow within the reaction chamber, leading to dust accumulation within the chamber and impacting the passivation effect. Utility Model Content

[0003] The purpose of the present invention is to provide a passivation device to solve the problem that the uneven distribution of process gas flow area in the existing passivation device affects the uniformity and consistency of the passivation of the cutting surface, thereby improving the passivation effect.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A passivation device is provided for accommodating a battery cell, wherein the battery cell has a surface to be passivated, the passivation device comprising a box having a passivation cavity therein, the box having an air inlet and an air outlet both connected to the passivation cavity, and a passivation gas sequentially flowing through the air inlet, the passivation cavity, and the air outlet; the passivation device further comprising:

[0006] A flow guide is provided in the passivation chamber and is located on a side of the passivation chamber close to the air inlet. The flow guide is provided with at least one first flow guide hole unit and at least one second flow guide hole unit. The passivation gas flowing through the first flow guide hole unit acts on the surface to be passivated of the battery cell, and the passivation gas flowing through the second flow guide hole unit acts on other areas of the passivation chamber.

[0007] As an optional structure of the present invention, the flow guide member is provided with one first flow guide hole unit and two second flow guide hole units, and the two second flow guide hole units are respectively located on both sides of the first flow guide hole unit.

[0008] As an optional structure of the present invention, the flow guide member is provided with two first flow guide hole units and one second flow guide hole unit, and the two first flow guide hole units are respectively located on both sides of the second flow guide hole unit.

[0009] As an optional structure of the present invention, the guide member is provided with at least two first guide hole units and two second guide hole units, at least two first guide hole units are arranged in sequence at intervals, and the two second guide hole units are respectively located on both sides of at least two first guide hole units.

[0010] As an optional structure of the present invention, the first guide hole unit includes multiple first guide holes, the second guide hole unit includes multiple second guide holes, and the sum of the hole areas of the multiple first guide holes is greater than the sum of the hole areas of the multiple second guide holes.

[0011] As an optional structure of the present invention, the number of the plurality of first guide holes is greater than the number of the plurality of second guide holes.

[0012] As an optional structure of the present invention, the aperture of the first guide hole is larger than the aperture of the second guide hole.

[0013] As an optional structure of the present invention, the first air guide hole unit and the second air guide hole unit are arranged in parallel.

[0014] As an optional structure of the present invention, the air inlet is arranged at the top of the box body, the air outlet is arranged at the bottom of the box body, and the flow guide is arranged at the top of the passivation chamber.

[0015] As an optional structure of the present invention, it further includes a flow equalizer plate, which is located in the passivation chamber and is arranged close to the air outlet.

[0016] Beneficial effects of the utility model:

[0017] The passivation device provided by the present invention includes a flow guide, which is arranged in the passivation chamber and is located on the side of the passivation chamber close to the air inlet. The flow guide is provided with at least one first flow guide unit and at least one second flow guide unit. The passivation gas flowing through the first flow guide unit acts on the surface of the battery cell to be passivated, and the passivation gas flowing through the second flow guide unit acts on other areas of the passivation chamber. The first flow guide unit and the second flow guide unit provided in the flow guide of this solution are used to divert the passivation gas flowing into the passivation chamber, so that the passivation gas flowing through the first flow guide unit acts on the surface of the battery cell to be passivated to passivate the battery cell, while the passivation gas flowing through the second flow guide unit acts on other areas of the passivation chamber, maintaining gas flow in other areas of the passivation chamber, avoiding dust accumulation in the passivation chamber, thereby affecting the process, and can also reduce the cleaning of the passivation chamber, improve the uniformity and consistency of the passivation gas distribution in the passivation chamber, and thus improve the passivation effect. The second air guide hole unit can be set on the side facing away from the passivation surface of the battery cell, that is, it is set parallel to the first air guide hole unit, or it can be set on one side of the passivation surface of the battery cell, that is, it is set at an angle to the first air guide hole unit, but there must be a gap between it and the first air guide hole unit to avoid affecting the airflow flowing through the first air guide hole unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the disassembly of the structure of the passivation device provided in an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the structure of the passivation device provided in Example 1 of the present utility model;

[0020] Figure 3 This is a top view of the structure of the flow guide provided in Example 1 of the present utility model;

[0021] Figure 4 This is a schematic diagram of the flow of passivation gas in the passivation device provided in Example 1 of the present utility model;

[0022] Figure 5 This is a cross-sectional view of the structure of the passivation device provided in Example 2 of the present utility model;

[0023] Figure 6 This is a top view of the structure of the flow guide provided in the second embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the flow of passivation gas in the passivation device provided in the second embodiment of the present invention;

[0025] Figure 8 This is a cross-sectional view of the structure of the passivation device provided in the third embodiment of the present invention;

[0026] Figure 9This is a top view of the structure of the flow guide provided in the third embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the flow of passivation gas in the passivation equipment provided in Example 3 of the present utility model.

[0028] In the picture:

[0029] 1. Box body; 11. Passivation chamber; 12. Air inlet; 13. Air outlet; 14. Inner chamber wall;

[0030] 2. Boat support assembly; 21. Passivation channel; 22. Diversion channel; 23. Boat;

[0031] 3. Flow guide; 31. First flow guide hole unit; 32. Second flow guide hole unit;

[0032] 4. Flow plate;

[0033] 100, surface to be passivated; 200, non-cutting surface. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] The utility model provides a passivation device, such as Figure 1 As shown, the passivation device is used to accommodate battery cells, and the battery cells have a surface to be passivated 100. The passivation device includes a housing 1, which has a passivation chamber 11. The housing 1 is provided with an air inlet 12 and an air outlet 13, both of which are connected to the passivation chamber 11. The passivation gas flows through the air inlet 12, the passivation chamber 11, and the air outlet 13 in sequence. The passivation device also includes a flow guide 3, which is arranged in the passivation chamber 11 and is located on the side of the passivation chamber 11 close to the air inlet 12. The flow guide 3 is provided with at least one first flow guide hole unit 31 and at least one second flow guide hole unit 32. The passivation gas flowing through the first flow guide hole unit 31 acts on the surface to be passivated 100 of the battery cell, and the passivation gas flowing through the second flow guide hole unit 32 acts on other areas of the passivation chamber 11.

[0039] The first guide hole unit 31 and the second guide hole unit 32 provided in the guide member 3 of the present embodiment are used to divert the passivation gas flowing into the passivation chamber 11, so that the passivation gas flowing through the first guide hole unit 31 acts on the passivation surface 100 of the battery cell to passivate the battery cell, while the passivation gas flowing through the second guide hole unit 32 acts on other areas of the passivation chamber 11, maintaining gas flow in other areas of the passivation chamber 11, avoiding the formation of dust accumulation in the passivation chamber 11, thereby affecting the process, and can also reduce the cleaning of the passivation chamber 11, improve the uniformity and consistency of the passivation gas distribution in the passivation chamber 11, and thus improve the passivation effect. The second air guide hole unit 32 can be set on the side facing away from the passivation surface 100 of the battery cell, that is, it is set parallel to the first air guide hole unit 31, or it can be set on one side of the passivation surface 100 of the battery cell, that is, it is set at an angle to the first air guide hole unit 31, but there must be a gap between it and the first air guide hole unit 31 to avoid affecting the airflow flowing through the first air guide hole unit 31.

[0040] Furthermore, in one embodiment, the flow guide 3 is provided with a first flow guide hole unit 31 and two second flow guide hole units 32, and the two second flow guide hole units 32 are respectively located on both sides of the first flow guide hole unit 31. Figure 3 and Figure 4 As shown, the surface 100 of the cell to be passivated is located in the middle of the passivation chamber 11. To improve the efficiency of the device, two groups of cells are arranged in the passivation chamber 11, with the surfaces 100 of the two groups of cells to be passivated facing each other. The passivation gas flowing through the first guide hole unit 31 flows between the surfaces 100 of the two groups of cells to be passivated, thereby passivating the surfaces 100 of the two groups of cells to be passivated. The second guide hole units 32 are located on both sides of the first guide hole unit 31 and can act on the side of the two groups of cells facing away from the surface 100 to be passivated, thereby preventing the passivation gas from depositing and forming powder in the passivation chamber 11.

[0041] Furthermore, in one embodiment, the guide member 3 is provided with two groups of first guide hole units 31 and one group of second guide hole units 32, and the two groups of first guide hole units 31 are respectively located on both sides of the second guide hole unit 32. Figure 5 and Figure 6 As shown, the surfaces 100 to be passivated of the two groups of battery cells are arranged "back to back", and there is a gap between the two groups of battery cells. The two groups of first guide hole units 31 correspond to the surfaces 100 to be passivated of the two groups of battery cells respectively, and the group of second guide hole units 32 corresponds to the area between the two groups of battery cells.

[0042] Furthermore, in one embodiment, the flow guide 3 is provided with at least two groups of first flow guide hole units 31 and two groups of second flow guide hole units 32, the at least two groups of first flow guide hole units 31 are sequentially arranged at intervals, and the two groups of second flow guide hole units 32 are respectively located on both sides of the at least two groups of first flow guide hole units 31. Figure 9 and Figure 10 As shown, three groups of battery cells are located in the passivation chamber 11, wherein the battery cell located in the middle group has two opposite surfaces to be passivated 100, so as to form a "face-to-face" arrangement with the battery cells on both sides respectively. The first guide hole unit 31 is set corresponding to the surface to be passivated 100, and is used to output the passivation gas to passivate the surface to be passivated 100. The second guide hole unit 32 is set corresponding to both sides of the three groups of battery cells to output the passivation gas to the passivation chamber 11, drive the gas flow in other areas, reduce the deposited powder in the passivation chamber 11, and also take away the powder in the chamber. Of course, multiple groups of battery cells can also be set in the passivation chamber 11, and the battery cell located in the middle can have two opposite surfaces to be passivated 100, or the surfaces to be passivated 100 of the two groups of battery cells can be set back to back.

[0043] Since the passivation gas flowing through the first guide hole unit 31 acts on the surface to be passivated 100 of the battery cell, and the passivation gas flowing through the second guide hole unit 32 drives the air flow in the passivation cavity 11, the first guide hole unit 31 includes multiple first guide holes, and the multiple second guide hole units 32 include multiple second guide holes. Therefore, the sum of the hole areas of the first guide hole unit 31 is set to be greater than the sum of the hole areas of the second guide hole units 32. The number of first guide holes can be greater than the number of second guide holes, or the aperture of the first guide hole is greater than the aperture of the second guide hole. This can save the use of passivation gas while meeting the needs.

[0044] In one embodiment, the first guide hole unit 31 and the second guide hole unit 32 are arranged in parallel. This arrangement can avoid interference between the passivation gas flowing through the first guide hole unit 31 and the passivation gas flowing through the second guide hole unit 32, thereby ensuring the passivation effect on the battery cell.

[0045] Furthermore, the air inlet 12 of the passivation device is arranged at the top of the box body 1, the air outlet 13 is arranged at the bottom of the box body 1, and the flow guide 3 is arranged at the top of the passivation chamber 11. Since the upper and lower distances of the passivation device are relatively short, the arrangement of the passivation device with air inlet at the top and air outlet at the bottom can shorten the path of the passivation gas, making the concentration of the passivation gas exposed to the passivation surface 100 of each cell relatively small, thereby improving the uniformity of the passivation film thickness.

[0046] In one embodiment, the passivation device further includes a flow plate 4, which is disposed within the passivation chamber 11 and near the gas outlet 13. In this solution, since the gas outlet 13 is located at the bottom of the housing 1, the flow plate 4 is disposed at the bottom of the passivation chamber 11. The provision of the flow plate 4 ensures a uniform pumping speed of the passivation gas throughout the passivation chamber 11, thereby synchronizing the passivation speed of the battery cells at each location and improving the uniformity of the passivation film thickness of the battery cells.

[0047] The following are some embodiments of the passivation device.

[0048] Example 1

[0049] like Figures 2 to 4 As shown, the first embodiment of the present invention provides a passivation device for accommodating cell wafers after segmentation, wherein the cell wafers have a surface 100 to be passivated. The passivation device includes a housing 1 having a passivation chamber 11 therein. The housing 1 is provided with an air inlet 12 and an air outlet 13 both communicating with the passivation chamber 11. The passivation gas flows sequentially through the air inlet 12, the passivation chamber 11, and the air outlet 13.

[0050] The passivation device is further provided with at least two groups of boat support assemblies 2 and a flow guide 3 arranged in the first direction. A plurality of channels are formed between adjacent boat support assemblies 2 and between the boat support assemblies 2 and the inner cavity wall 14 of the passivation cavity 11, and the plurality of channels include passivation channels 21 and flow guide channels 22, the length directions of the passivation channels 21 and the flow guide channels 22 extending in the second direction. The boat support assembly 2 includes a plurality of small boats 23 arranged in the second direction, and the small boats 23 are used to carry the battery pieces. The passivation surfaces 100 of the battery pieces on each group of boat support assemblies 2 face in the same direction, and the passivation surfaces face the passivation channels 21. The flow guide 3 is arranged in the passivation cavity 11 and is located upstream of the boat support assemblies 2 in the gas flow direction. The flow guide 3 is provided with a plurality of first flow guide holes facing the passivation channels 21 and a plurality of second flow guide holes facing the flow guide channels 22. The passivation gas is divided by the flow guide 3 as soon as it enters the passivation cavity 11, thereby improving the uniformity of the gas flow distribution. The plurality of first flow guide holes and the plurality of second flow guide holes are arranged in the second direction, respectively, and the sum of the hole areas of the plurality of first flow guide holes is greater than the sum of the hole areas of the plurality of second flow guide holes. The plurality of first flow guide holes can guide more passivation gas into the passivation channels 21 to blow the passivation surfaces 100 facing the passivation channels 21; the plurality of first flow guide holes extend along the length direction of the passivation channels 21, thereby uniformly blowing all the passivation surfaces 100 in the small boats 23 and ensuring the uniformity and consistency of the passivation effect. The plurality of second flow guide holes can guide a small amount of passivation gas into the flow guide channels 22 to maintain the flowability of the passivation gas in the entire passivation cavity 11, thereby avoiding dust accumulation in the passivation cavity 11 and affecting the process; and since the sum of the hole areas of the second flow guide holes is small, the flow of a large amount of passivation gas into the flow guide channels 22 is avoided, thereby ensuring the passivation effect.

[0051] The gas inlet 12 is arranged at the top of the box body 1, the gas outlet 13 is arranged at the bottom of the box body 1, and the flow guide 3 is arranged at the top of the boat support assembly 2. The passivation gas flows from top to bottom, and the flowability is good.

[0052] In this embodiment, the battery cell is formed by cutting the battery cell body. A single battery cell body is cut once to form two battery cells, that is, a two-piece cutting method is adopted. The cut surface forms a surface to be passivated 100. Each battery cell has a surface to be passivated 100 and a non-cut surface 200. The surface to be passivated 100 and the non-cut surface 200 are arranged opposite to each other on both sides of the battery cell. The boat support assembly 2 is provided with two groups to respectively carry two battery cells formed by cutting a single battery cell body, so that the surface to be passivated 100 of the two battery cells are arranged opposite to each other, forming a "face-to-face" arrangement. For the battery cells on a group of boat support assemblies 2, one side is the surface to be passivated 100 and the other side is the non-cut surface 200. A passivation channel 21 is formed between the two groups of boat support assemblies 2, that is, the surface to be passivated 100 of the battery cells on the two groups of boat support assemblies 2 are arranged face to face. There is a row of surfaces to be passivated 100 on each side of the passivation channel 21. The large amount of passivation gas flowing in the passivation channel 21 passivates the surfaces to be passivated 100 on both sides. A guide channel 22 is formed between the two groups of boat support assemblies 2 and their corresponding inner cavity walls 14. The non-cut surface 200 of the battery cell faces the guide channel 22. A small amount of passivation gas flows in the guide channel 22 to prevent dust accumulation.

[0053] Accordingly, the plurality of second guide holes form two groups of second guide hole units 32. Each group of second guide hole units 32 includes a plurality of second guide holes arranged sequentially along the second direction. Along the first direction, the plurality of first guide holes are located in the middle of the guide member 3 to correspond to the passivation channel 21. The two groups of second guide hole units 32 are located on either side of the guide member 3 to correspond to the two guide channels 22, respectively.

[0054] To ensure that the sum of the hole areas of the plurality of first guide holes is greater than the sum of the hole areas of the second guide holes, the number of first guide holes is greater than the number of second guide holes, and / or the aperture of the first guide holes is greater than the aperture of the second guide holes. That is, if the aperture of the first guide holes is equal to the aperture of the second guide holes, the number of first guide holes is greater than the number of second guide holes, or if the number of first guide holes is equal to the number of second guide holes, the aperture of the first guide holes is greater than the aperture of the second guide holes, or, alternatively, both the aperture of the first guide holes is greater than the aperture of the second guide holes and the number of the first guide holes is greater than the number of the second guide holes.

[0055] The plurality of first guide holes are arranged in sequence along the second direction to form a row, and along the first direction, the plurality of first guide holes form multiple rows. The first guide holes arranged in rows in the first direction better guide the passivation gas and reduce turbulence.

[0056] To further guide the flow of the passivation gas, the passivation device also includes a flow equalizer 4, which is disposed within the passivation chamber 11 and near the gas outlet 13. One of the flow guide 3 and the flow equalizer 4 is located upstream of the boat support assembly 2, while the other is located downstream of the boat support assembly 2. The flow equalizer 4 is provided with a plurality of flow equalizer holes, each of which faces the passivation channel 21 and the guide channel 22, respectively, to increase the uniformity of the flow of the passivation gas.

[0057] Example 2

[0058] like Figures 5 to 7 As shown, this embodiment 2 provides a passivation device, which includes a housing 1, at least two sets of boat support assemblies 2 spaced apart along a first direction, and a flow guide 3. Its structure is basically the same as that of the passivation device in embodiment 1. This embodiment does not repeat the same parts.

[0059] In this embodiment, the battery cell is formed by cutting the battery cell body. A single battery cell body is cut once to form two battery cells, that is, a two-piece cutting method is adopted. The cut surface forms the passivation surface 100, and each battery cell has a passivation surface 100 and a non-cut surface 200, which are arranged on opposite sides of the battery cell. The boat support assembly 2 is provided with two groups to respectively carry two battery cells formed by cutting a single battery cell body, so that the passivation surfaces 100 of the two battery cells are arranged opposite to each other, forming a back-to-back arrangement. For the battery cells on a group of boat support assemblies 2, one side thereof is the surface to be passivated 100, and the other side is the non-cutting surface 200. A guide channel 22 is formed between the two groups of boat support assemblies 2, that is, the surfaces to be passivated 100 of the battery cells on the two groups of boat support assemblies 2 are arranged back to back, and a small amount of passivation gas flows in the guide channel 22 to prevent dust accumulation; a passivation channel 21 is formed between the two groups of boat support assemblies 2 and their respective corresponding inner cavity walls 14, and the passivation gas entering from the air inlet 12 is divided into two streams with larger and more uniform flow rates by the guide member 3, and enters the two passivation channels 21 respectively, thereby passivating the surface to be passivated 100 on one side of the passivation channel 21.

[0060] Correspondingly, the multiple first guide holes form two groups of first guide hole units 31, and each group of first guide hole units 31 includes a plurality of first guide holes arranged in sequence along the second direction; along the first direction, the multiple second guide holes are located in the middle of the guide member 3 to correspond to the guide channel 22, and the two groups of first guide hole units 31 are respectively located on both sides of the guide member 3 to correspond to the two passivation channels 21 respectively.

[0061] Example 3

[0062] like Figures 8 to 10As shown, this embodiment 3 provides a passivation device, which includes a housing 1, at least two sets of boat support assemblies 2 spaced apart along a first direction, and a flow guide 3. Its structure is basically the same as that of the passivation device in embodiment 1. This embodiment does not repeat the same parts.

[0063] In this embodiment, the battery cell is formed by cutting the battery cell body, and a single battery cell body is cut twice to form three battery cells, that is, a three-piece cutting method is adopted. The cut surface forms a surface to be passivated 100. In this way, one of the three battery cells has two surfaces to be passivated 100, and the remaining two battery cells each have a surface to be passivated 100 and a non-cut surface 200. The surfaces to be passivated 100 and the non-cut surface 200 are arranged on both sides of the battery cell. Three groups of boat support assemblies 2 are provided to respectively carry the three battery cells formed by cutting a single battery cell body. Among them, the middle group of the three groups of boat support assemblies 2 is used to carry the battery cell with two surfaces to be passivated 100, and the two groups on both sides are used to carry the battery cell with one surface to be passivated 100. Passivation channels 21 are formed between the middle group of boat support assemblies 2 and the two adjacent groups of boat support assemblies 2. A large amount of passivation gas in the flow channel of the passivation channel 21 passivates the surfaces to be passivated 100 on both sides. A guide channel 22 is formed between the two groups of boat support assemblies 2 on both sides and the corresponding inner cavity walls 14, and a small amount of passivation gas flows in the guide channel 22 to prevent dust accumulation.

[0064] Accordingly, the plurality of first guide holes form two groups of first guide hole units 31, each group of first guide hole units 31 including a plurality of first guide holes arranged sequentially along the second direction; the plurality of second guide holes form two groups of second guide hole units 32, each group of second guide hole units 32 including a plurality of second guide holes arranged sequentially along the second direction. Along the first direction, the plurality of first guide hole units 31 are spaced apart in the middle of the guide member 3 to correspond to the two passivation channels 21, respectively. The two groups of second guide hole units 32 are located on either side of the guide member 3 to correspond to the two guide channels 22, respectively.

[0065] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A passivation device for accommodating a battery cell, wherein the battery cell has a surface to be passivated (100), the passivation device comprising a box (1), wherein a passivation cavity (11) is provided in the box (1), and the box (1) is provided with an air inlet (12) and an air outlet (13) both of which are connected to the passivation cavity (11), and a passivation gas flows through the air inlet (12), the passivation cavity (11) and the air outlet (13) in sequence; characterized in that: The passivation device also includes: A flow guide (3) is provided in the passivation cavity (11) and is located on a side of the passivation cavity (11) close to the air inlet (12). The flow guide (3) is provided with at least one first flow guide hole unit (31) and at least one second flow guide hole unit (32). The passivation gas flowing through the first flow guide hole unit (31) acts on the surface to be passivated (100) of the battery cell, and the passivation gas flowing through the second flow guide hole unit (32) acts on other areas of the passivation cavity (11).

2. The passivation device according to claim 1, characterized in that The flow guide member (3) is provided with a first flow guide hole unit (31) and two second flow guide hole units (32), and the two second flow guide hole units (32) are respectively located on both sides of the first flow guide hole unit (31).

3. The passivation device according to claim 1, characterized in that The flow guide member (3) is provided with two first flow guide hole units (31) and one second flow guide hole unit (32), and the two first flow guide hole units (31) are respectively located on both sides of the second flow guide hole unit (32).

4. The passivation device according to claim 1, characterized in that The flow guide member (3) is provided with at least two first flow guide hole units (31) and two second flow guide hole units (32), the at least two first flow guide hole units (31) are arranged in sequence at intervals, and the two second flow guide hole units (32) are respectively located on both sides of the at least two first flow guide hole units (31).

5. The passivation device according to any one of claims 1 to 4, characterized in that: The first flow guide hole unit (31) includes a plurality of first flow guide holes, the second flow guide hole unit (32) includes a plurality of second flow guide holes, and the sum of the hole areas of the plurality of first flow guide holes is greater than the sum of the hole areas of the plurality of second flow guide holes.

6. The passivation device according to claim 5, characterized in that The number of the first guide holes is greater than the number of the second guide holes.

7. The passivation device according to claim 5, characterized in that The aperture of the first guide hole is larger than the aperture of the second guide hole.

8. The passivation device according to any one of claims 1 to 4, characterized in that: The first guide hole unit (31) and the second guide hole unit (32) are arranged in parallel.

9. The passivation device according to claim 1, characterized in that The air inlet (12) is arranged at the top of the box body (1), the air outlet (13) is arranged at the bottom of the box body (1), and the flow guide (3) is arranged at the top of the passivation chamber (11).

10. The passivation device according to claim 1, characterized in that It also includes a flow equalizer (4), which is located in the passivation cavity (11) and is arranged close to the air outlet (13).

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