Battery piece edge passivation piece box and edge passivation equipment

Abstract

The utility model discloses a battery piece edge passivation piece box and an edge passivation device, comprising a box body made of conductive material, the box body is recessed inwards to form an accommodating groove, one side in the accommodating groove is provided with a supporting plate, and the other side of the accommodating groove opposite to the supporting plate is provided with a fixing assembly moving towards the supporting plate; the accommodating groove is used for placing a group of battery pieces which are tightly arranged in a matched manner, and the cutting surfaces of all the battery pieces face the opening of the accommodating groove; the fixing assembly is used for being matched with the supporting plate to compress and fix all the battery pieces; the side, facing the supporting plate, of the fixing assembly and the supporting plate are both made of insulating materials. In this way, the side, facing the supporting plate, of the fixing assembly and the non-cutting face, making contact with the supporting plate, of the battery piece cannot generate the winding plating phenomenon, and the conversion efficiency of the battery piece is improved.

Description

Technical Field

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

[0002] With the development of the photovoltaic industry and the continuous upgrading of crystalline silicon cell technology, laser dicing technology is used in the cell module production process to divide a whole cell into two or more smaller pieces. This reduces the string current in the cell module and thus reduces power loss due to lower series resistance, making it one of the important and effective ways to improve the power of photovoltaic modules.

[0003] However, laser dicing also impacts the cell conversion efficiency. Carrier recombination is more pronounced on the newly cut surface (the unpassivated surface) of the cell, and edge recombination has a more significant impact on conversion efficiency for high-efficiency cells. To eliminate or reduce the efficiency loss caused by laser non-destructive dicing (TLS), cell manufacturers perform a passivation coating process on the edges of the newly formed cut surfaces. This effectively reduces or eliminates the efficiency loss caused by dicing.

[0004] However, after the cut solar cells undergo edge passivation coating, the conversion efficiency of the solar cells is too low. Utility Model Content

[0005] This invention provides a battery cell edge passivation box and edge passivation equipment to solve the problem of low conversion efficiency of battery cells after edge passivation coating in the prior art.

[0006] The technical solution of this utility model is a battery cell edge passivation cell box, including a box body made of conductive material, the box body is recessed inward to form a receiving groove, a support plate is provided on one side of the receiving groove, and a fixing component that moves toward the support plate is provided on the other side of the receiving groove opposite to the support plate.

[0007] The receiving slot is used to accommodate a set of closely arranged solar cells, with the cut surfaces of all solar cells facing the opening of the receiving slot; the fixing component is used to cooperate with the tray to press and fix all solar cells together.

[0008] The side of the fixing component facing the tray and the tray itself are both made of insulating material.

[0009] Furthermore, the top of both sides of the receiving groove that restricts the lateral displacement of the fixing component are provided with detachable limiting plates, which are made of insulating material;

[0010] The top of the fixing component facing the tray and the top of the tray are both higher than the bottom of the limiting plate; and the fixing component facing the tray, the tray and the limiting plate can enclose and form a fixing space for fixing all the battery cells.

[0011] Furthermore, the bottom of the receiving slot is provided with a removable base plate, which is made of insulating material; the base plate is used in conjunction with the limiting plate to change the volume of the fixed space for placing the battery cells.

[0012] Furthermore, the fixing components include a pressure plate, guide rods, and gripping elements;

[0013] A pressure plate made of insulating material is provided on the other side of the receiving slot away from the tray. The pressure plate is provided with multiple guide rods, all of which pass through the side wall of the box away from the tray and are connected to the gripping component.

[0014] The gripper is used to connect to the robotic arm, and the robotic arm drives the pressure plate to move toward or away from the pallet.

[0015] Furthermore, each guide rod located between the pressure plate and the corresponding side wall of the box is fitted with an elastic element.

[0016] Furthermore, multiple vertically arranged guide rods are provided on both sides of the pressure plate along the direction of restricting the lateral displacement of the fixing component.

[0017] Furthermore, the gripper has a connection interface adapted to the robotic arm.

[0018] Furthermore, each of the outer side walls on both sides of the box body restricting the lateral displacement of the fixing component is provided with at least one first electrode rod and at least one second electrode rod; a first electrode plate and a second electrode plate are provided at intervals on the top of the box body;

[0019] Both the first electrode rod and the second electrode rod are used to conduct electricity with the first electrode of the edge passivation boat; both the first electrode plate and the second electrode plate are used to conduct electricity with the second electrode of the edge passivation boat.

[0020] Furthermore, the first electrode plate is located above the second electrode plate.

[0021] This utility model also proposes an edge passivation device, which includes the aforementioned battery cell edge passivation cassette.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] When a set of closely arranged battery cells are placed in the receiving groove of this utility model, the two sides of the battery cells along the Y-axis will abut against the inner sidewall of the corresponding box, preventing gaps between the two sides of the battery cells along the Y-axis and the inner sidewall of the corresponding box. At the same time, the fixing component will move towards the tray to fix all the battery cells placed in the receiving groove, preventing the battery cells from shaking in the receiving groove and ensuring the stability of the coating of the battery cells. Moreover, the side of the fixing component facing the tray and the tray are both made of insulating material to prevent unnecessary electrical contact, significantly reduce the local electric field strength around the corresponding battery cells, and ensure that the non-cut surface of the battery cell in contact with the tray on the side of the fixing component facing the tray will not be coated around, thus improving the conversion efficiency of the battery cells. The cut surface of the battery cells can receive coating in a relatively stable and interference-free electric field environment, thereby ensuring the uniformity of passivation coating on the cut surface of the battery cells, and thus improving the overall performance and reliability of the battery cells. Attached Figure Description

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects and not to describe a particular order.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the first structure of the battery cell edge passivation box proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the second structure of the battery cell edge passivation box proposed in this utility model;

[0028] Figure 3 This is a front view of the edge-passivated boat proposed in this utility model.

[0029] Figure label:

[0030] 10. Box body; 101. First limiting component;

[0031] 20. Receiving groove;

[0032] 30. Pallet;

[0033] 40. Fixing component; 401. Pressure plate; 402. Guide rod; 403. Gripping component; 404. Elastic component; 405. Connecting interface; 406. Second limiting component;

[0034] 50. Restriction plate;

[0035] 60. Fixed space;

[0036] 70. First electrode rod;

[0037] 80. Second electrode rod;

[0038] 90. First electrode plate;

[0039] 100. Second electrode plate;

[0040] 110. Battery cells;

[0041] 120. Edge passivation boat. Detailed Implementation

[0042] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present utility model, and does not imply that every embodiment of the present utility model must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0043] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0044] In the photovoltaic industry, crystalline silicon cells are divided into two or more smaller pieces using laser dicing technology. This reduces string current in the cell module and thus lowers power loss due to reduced series resistance, making it one of the important and effective ways to increase the power of photovoltaic modules.

[0045] However, laser dicing also impacts the cell conversion efficiency. Carrier recombination is more pronounced on the newly cut surface (the unpassivated surface) of the cell, and edge recombination has a more significant impact on conversion efficiency for high-efficiency cells. To eliminate or reduce the efficiency loss caused by laser non-destructive dicing (TLS), cell manufacturers perform a passivation coating process on the edges of the newly formed cut surfaces. This effectively reduces or eliminates the efficiency loss caused by dicing.

[0046] However, after the cut solar cells undergo edge passivation coating, the conversion efficiency of the solar cells is too low.

[0047] Therefore, to address the issue of low conversion efficiency in solar cells after edge passivation coating, refer to the attached... Figure 1-2 This utility model proposes a battery cell edge passivation cell box, including a box body 10 made of conductive material, the box body 10 is recessed inward to form a receiving groove 20, a support plate 30 is provided on one side of the receiving groove 20, and a fixing component 40 that moves toward the support plate 30 is provided on the other side of the receiving groove 20 opposite to the support plate 30.

[0048] The receiving groove 20 is used to accommodate a set of closely arranged battery cells 110, with the cut surfaces of all battery cells 110 facing the opening of the receiving groove 20; the fixing component 40 is used to cooperate with the tray 30 to press and fix all battery cells 110.

[0049] The fixing component 40 facing the tray 30 and the tray 30 are both made of insulating material.

[0050] It should be noted that in this embodiment, the opposite sides of the tray 30 and the fixing component 40 of the box 10 are in the X-axis direction of the box 10, and the same applies throughout the text. In this embodiment, the opening of the receiving groove 20 is located at the top of the box 10; in this embodiment, the battery cell 110 is illustrated by example as a cut crystalline silicon battery cell or solar cell.

[0051] In this embodiment, the cross-sectional shape of the box 10 and the receiving groove 20 along the X-axis can be rectangular, square, etc., as long as it can accommodate and fix the battery cell 110, and is not limited here. In this embodiment, when the receiving groove 20 is full of battery cells 110, it is a set of battery cells 110, and the same applies throughout the text.

[0052] Thus, when a set of closely arranged battery cells 110 are placed in the receiving groove 20, the two sides of the battery cells 110 along the Y-axis will abut against the inner sidewall of the corresponding box 10, preventing gaps between the two sides of the battery cells 110 along the Y-axis and the inner sidewall of the corresponding box 10; at the same time, the fixing component 40 will move towards the tray 30 to fix all the battery cells 110 placed in the receiving groove 20, preventing the battery cells 110 from shaking in the receiving groove 20 and ensuring the coating stability of the battery cells 110; and to ensure that the non-cut surface of the battery cells 110 that is in contact with the tray 30 on the side of the fixing component 40 facing the tray 30 will not be coated around the tray 30. The phenomenon is that the side of the fixing component 40 facing the tray 30 and the tray 30 are both made of insulating material, thereby preventing unnecessary electrical contact between the side of the fixing component 40 facing the tray 30 and the tray 30 and the battery cell 110, and significantly reducing the local electric field intensity around the corresponding battery cell 110. In this way, when the cut surface of the battery cell 110 is subjected to passivation coating treatment, the cut surface of the battery cell 110 can be coated in a relatively stable and interference-free electric field environment, thereby ensuring the uniformity of passivation coating on the cut surface of the battery cell 110, improving the conversion efficiency of the battery cell 110, and thus improving the overall performance and reliability of the battery cell 110.

[0053] To ensure that the set of battery cells 110 placed in the receiving groove 20 does not shake and to ensure the stability of the battery cells 110 during passivation coating, refer to the attached document. Figure 1 The top of both sides of the receiving groove 20, which restricts the lateral displacement of the fixing component 40, is provided with a detachable limiting plate 50, which is made of insulating material.

[0054] The top of the side of the fixing component 40 facing the tray 30 and the top of the tray 30 are both higher than the bottom of the limiting plate 50; and the side of the fixing component 40 facing the tray 30, the tray 30 and the limiting plate 50 can enclose and form a fixing space 60 for fixing all the battery cells 110.

[0055] Furthermore, to ensure that the non-cut surfaces of the solar cell 110 in contact with the limiting plate 50 do not experience plating wrap-around, the limiting plate 50 is made of insulating material. This prevents unnecessary electrical contact between the limiting plate 50 and the solar cell 110, significantly reducing the local electric field strength around the corresponding solar cell 110. As a result, when the cut surfaces of the solar cell 110 undergo passivation plating, the cut surfaces can receive plating in a relatively stable and interference-free electric field environment. This ensures the uniformity of passivation plating on the cut surfaces of the solar cell 110, improves the conversion efficiency of the solar cell 110, and ultimately enhances the overall performance and reliability of the solar cell 110.

[0056] The bottom of the receiving groove 20 is provided with a removable base plate (not shown, same throughout the text), which is made of insulating material. The base plate is used to cooperate with the limiting plate 50 to change the volume of the fixed space 60 for placing the battery cell 110, thereby improving the applicability of the battery cell edge passivation box and enabling the receiving groove 20 of the battery cell edge passivation box to hold battery cells 110 of different specifications and sizes. The specifications of battery cells 110 that can be accommodated by the receiving groove 20 may include 182mm, 210mm, 230mm, etc., which are not limited in this embodiment.

[0057] It is understood that the side of the fixing component 40 facing the support plate 30, the support plate 30, the limiting plate 50, and the base plate are all made of insulating material. The insulating material may include ceramic, quartz, etc., as long as it can prevent the occurrence of plating. No limitation is made here.

[0058] It should be noted that the direction of limiting the lateral displacement of the fixing component 40 proposed in this embodiment is the Y-axis direction of the box 10, and the same applies throughout the text.

[0059] When a set of battery cells 110 is placed in the receiving slot 20, there are two possible scenarios:

[0060] Firstly, both sides of a group of battery cells 110 along the Y-axis will abut against the inner sidewall of the corresponding housing 10. At this time, with the cooperation of the base plate, the top of each group of battery cells 110 will extend beyond the opening of the receiving groove 20, and the extension length is equal to the thickness of the limiting plate 50. That is, the limiting plate 50 will not extend into the receiving groove 20, so that the limiting plate 50 and the portion of the group of battery cells 110 extending out of the receiving groove 20 are aligned and fixed (i.e., the top of the group of battery cells 110 and the top of the limiting plate 50 are flush), preventing one... The battery cells 110 oscillate along the Y-axis, while ensuring that only the cut surfaces (equivalent to the coated surfaces, the same throughout) of all the battery cells 110 are exposed. The non-cut surfaces (equivalent to the non-coated surfaces, the same throughout) of all the battery cells 110 are respectively in contact with the inner sidewalls on both sides of the box body 10 in the direction of limiting the lateral displacement of the fixing component 40, the side of the fixing component 40 facing the support plate 30, the support plate 30 and the limiting plate 50, effectively preventing the non-cut surfaces of the battery cells 110 from being coated, thereby ensuring that the conversion efficiency of the battery cells 110 will not be reduced.

[0061] Meanwhile, the base plate, the limiting plate 50, the fixing component 40 facing the support plate 30 and the support plate 30 can enclose and form a fixing space 60 for fixing all the battery cells 110, preventing the battery cells 110 from shaking during edge passivation coating and ensuring the coating stability of the battery cells 110.

[0062] Secondly, neither side of a group of battery cells 110 along the Y-axis abuts against the inner wall of the corresponding housing 10, and the height of the group of battery cells 110 does not extend beyond the opening of the receiving groove 20. Therefore, a thicker base plate is needed so that the top of each group of battery cells 110 inserted into the receiving groove 20 partially extends beyond the opening of the receiving groove 20. Simultaneously, a wider limiting plate 50 is also needed, meaning the limiting plate 50 will extend into the receiving groove 20, aligning and fixing the limiting plate 50 with the portion of the group of battery cells 110 extending beyond the receiving groove 20 (i.e., the top of the group of battery cells 110). The top of the fixed component 40 and the limiting plate 50 are flush, ensuring that only the cut surface of one set of battery cells 110 is exposed. The set of battery cells 110 is in contact with the side of the fixed component 40 facing the support plate 30, the support plate 30 and the limiting plate 50 around the cut surface. This prevents process gas from flowing into the receiving groove 20 from the gap between the fixed component 40 facing the support plate 30, the support plate 30, the limiting plate 50 and the set of battery cells 110 and coming into contact with the non-cut surface of the battery cells 110. This effectively prevents the non-cut surface of the battery cells 110 from being coated, thereby ensuring that the conversion efficiency of the battery cells 110 will not be reduced.

[0063] Furthermore, both the base plate and the limiting plate 50 are made of insulating material, which can prevent unnecessary electrical contact between the base plate, the limiting plate 50 and the solar cell 110, and significantly reduce the local electric field intensity around the corresponding solar cell 110. In this way, when the cut surface of the solar cell 110 is subjected to passivation coating treatment, the cut surface of the solar cell 110 can be coated in a relatively stable and interference-free electric field environment, thereby ensuring the uniformity of passivation coating on the cut surface of the solar cell 110, and thus improving the overall performance and reliability of the solar cell 110.

[0064] Of course, in some embodiments, to prevent damage to the battery cell 110, a buffer layer made of silicone is provided on the side of the fixing assembly 40 facing the tray 30, and at the contact position between the tray 30 and the non-cut surface of the battery cell 110 and the limiting plate 50.

[0065] Among them, refer to the appendix Figure 1 This embodiment proposes a composition for the fixing component 40:

[0066] The fixing assembly 40 includes a pressure plate 401, a guide rod 402, and a gripper 403;

[0067] The receiving groove 20 has a pressure plate 401 made of insulating material on the other side away from the tray 30. The pressure plate 401 has multiple guide rods 402, all of which pass through the side wall of the box 10 away from the tray 30 and are connected to the gripper 403.

[0068] The gripper 403 is used to connect to the robotic arm, and the robotic arm drives the pressure plate 401 to move toward or away from the pallet 30.

[0069] It should be noted that the top of the pressure plate 401 and the top of the support plate 30 are both higher than the bottom of the limiting plate 50. Of course, the top of the pressure plate 401 and the top of the support plate 30 can also be flush with the top of the limiting plate 50.

[0070] When a set of battery cells 110 is placed into the receiving slot 20, the control unit of the edge coating equipment will control the gripper 403 to move towards the tray 30 via the robotic arm, thereby moving the pressure plate 401 towards the tray 30, and finally fixing the set of battery cells 110 between the pressure plate 401 and the tray 30. This prevents the battery cells 110 from wobbling along the X-axis of the box 10 during edge passivation coating, ensuring the coating stability of the battery cells 110. When the battery cells 110 need to be removed after passivation coating is completed, the control unit will control the robotic arm to move the gripper 403 away from the tray 30, thereby moving the pressure plate 401 away from the tray 30.

[0071] In order to absorb the impact energy when the robotic arm moves the gripper 403 and reduce the impact of direct collision, refer to the appendix. Figure 1 Each guide rod 402 located between the pressure plate 401 and the corresponding side wall of the box 10 is fitted with an elastic element 404; and the elastic element 404 is preferably a compression spring.

[0072] When the robotic arm controls the gripper 403 to move toward the pallet 30, the elastic element 404 is compressed; and when the robotic arm drives the gripper 403 to move away from the pallet 30, the elastic element 404 recovers due to its own elastic deformation.

[0073] In order to enable the gripper 403 to move the pressure plate 401 more stably, refer to the attached document. Figure 2 The pressure plate 401 has two vertically arranged guide rods 402 on both sides of the direction of limiting the lateral displacement of the fixing component 40.

[0074] Specifically, the outer wall of the box body 10 facing the gripper 403 is provided with a first limiting member 101 corresponding to each guide rod 402, and the pressure plate 401 faces the gripper 403 and is provided with a second limiting member 406 corresponding to each guide rod 402. In this way, the guide rod 402 on the pressure plate 401 passes through the second limiting member 406, the corresponding side wall of the box body 10, and the first limiting member 101 in sequence before connecting with the gripper 403, ensuring that the guide rod 402 will not deviate under the action of the first limiting member 101 and the second limiting member 406.

[0075] Among them, refer to the appendix Figure 1 The gripper 403 has a connection interface 405 adapted to the robot arm, which is used to connect the robot arm.

[0076] When it is necessary to push the gripper 403 to move the pressure plate 401 towards the tray 30 to fix a set of battery cells 110 between the pressure plate 401 and the tray 30 for passivation coating, the robot will quickly connect with the connection interface 405 and push the gripper 403. If the passivation coating is completed and it is necessary to remove the set of passivated battery cells 110 from the receiving groove 20, the control unit will control the robot to move the gripper 403 away from the tray 30, thereby moving the pressure plate 401 away from the tray 30.

[0077] Among them, refer to the appendix Figure 3 The outer walls on both sides of the box body 10, which restrict the lateral displacement of the fixing component 40, are respectively provided with a first electrode rod 70 and a second electrode rod 80; a first electrode plate 90 and a second electrode plate 100 are provided at intervals on the upper part of the box body 10; and the first electrode plate 90 and the second electrode plate 100 are connected at intervals by bolts.

[0078] The first electrode rod 70 and the second electrode rod 80 are both connected to the first electrode of the edge passivation boat 120; the first electrode plate 90 and the second electrode plate 100 are connected to the second electrode of the edge passivation boat 120.

[0079] It is understood that this embodiment uses the first electrode of the edge passivation boat 120 as the negative electrode and the second electrode as the positive electrode as an example.

[0080] Specifically, the first electrode rod 70 and the second electrode rod 80 are both electrically connected to the negative electrode of the lower boat frame located on the edge passivation boat 120; the first electrode plate 90 and the second electrode plate 100 are both electrically connected to the positive electrode of the upper boat frame located on the edge passivation boat 120.

[0081] By connecting the first and second electrodes of the edge passivation boat 120 to corresponding AC power sources, an alternating electric field can be formed on the top of the housing 10. This causes the plasma generated by the alternating electric field to act on the cut surface of the battery cell 110 on the top of the housing 10, thereby passivating the cut surface of the battery cell 110. Furthermore, the first electrode rod 70 and the second electrode rod 80 can also be used to support the housing 10 on the lower frame of the edge passivation boat 120.

[0082] In order to ensure that the alternating electric field formed between the first electrode plate 90 and the top of the box 10 can better passivate the cut surface of the battery cell 110, the first electrode plate 90 is located above the second electrode plate 100.

[0083] This utility model also proposes an edge passivation device, which includes the aforementioned battery cell edge passivation cassette.

[0084] Among them, refer to the appendix Figure 3The edge passivation equipment also includes an edge passivation boat 120, which contains multiple battery cell edge passivation boxes. The edge passivation boat 120 is then fed into the coating reaction chamber by the automatic feeding and unloading mechanism of the edge passivation equipment. This allows the cut surfaces of a group of battery cells 110 in the battery cell edge passivation boxes to be processed using ALD (Atomic Layer Deposition) + PECVD (Plasma Enhanced Chemical Vapor Deposition) technology. Under the same working conditions in the coating reaction chamber, the process route of composite passivation films is completed in one go.

[0085] Of course, in other embodiments, depending on the actual situation, the cut surfaces of a group of battery cells 110 in the passivation cell box can be subjected to processes such as silicon nitride deposition and annealing in the coating reaction chamber to achieve the superposition of multiple processes, so that the cut surfaces of the battery cells 110 can achieve a better passivation effect, thereby effectively reducing and repairing the conversion efficiency loss after the entire battery cell is cracked.

[0086] Furthermore, the outer side walls on both sides of the box body 10, which restrict the lateral displacement of the fixing component 40, are respectively provided with a first electrode rod 70 and a second electrode rod 80; the edge passivation boat 120 located above the box body 10 is provided with a first electrode plate 90 and a second electrode plate 100 at intervals; and the first electrode plate 90 is located above the second electrode plate 100, and the first electrode plate 90 and the second electrode plate 100 are connected at intervals by bolts.

[0087] The first electrode rod 70 and the second electrode rod 80 are both connected to the negative electrode of the lower boat frame of the edge passivation boat 120; the first electrode plate 90 and the second electrode plate 100 are both connected to the positive electrode of the upper boat frame of the edge passivation boat 120.

[0088] By connecting the positive and negative electrodes of the edge passivation boat 120 to corresponding AC power sources, an alternating electric field is formed on the top of the housing 10. This causes the plasma generated by the alternating electric field to act on the cut surface of the battery cell 110 on the top of the housing 10, thereby passivating the cut surface of the battery cell 110. Furthermore, the first electrode rod 70 and the second electrode rod 80 can also be used to support the housing 10 on the lower frame of the edge passivation boat 120.

[0089] Of course, ensuring that an alternating electric field is formed between the first electrode plate 90 and the top of the box 10 can better passivate the cut surface of the battery cell 110. The first electrode plate 90 and the second electrode plate 100 above all the battery cell edge passivation boxes located in the same edge passivation boat 120 are all integrally formed.

[0090] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A battery cell edge passivation cassette, characterized in that, Includes a box body (10) made of conductive material, the box body (10) is recessed inward to form a receiving groove (20), a tray (30) is provided on one side of the receiving groove (20), and a fixing component (40) that moves toward the tray (30) is provided on the other side of the receiving groove (20) opposite to the tray (30). The receiving groove (20) is used to fit a set of closely arranged battery cells (110), and the cut surfaces of all the battery cells (110) face the opening of the receiving groove (20); the fixing component (40) is used to cooperate with the tray (30) to press and fix all the battery cells (110); The fixing component (40) facing the tray (30) and the tray (30) are both made of insulating material.

2. The cell edge passivation cassette according to claim 1, characterized in that, The receiving groove (20) restricts the lateral displacement of the fixing component (40) on both sides of the top of the groove (20) with detachable limiting plates (50) made of insulating material. The top of the fixing component (40) facing the tray (30) and the top of the tray (30) are both higher than the bottom of the limiting plate (50); and the fixing component (40) facing the tray (30), the tray (30) and the limiting plate (50) can enclose and form a fixing space (60) for fixing all the battery cells (110).

3. The cell edge passivation cassette according to claim 2, characterized in that, The bottom of the receiving groove (20) is provided with a detachable base plate, which is made of insulating material; the base plate is used to cooperate with the limiting plate (50) to change the volume of the fixed space (60) for placing the battery cell (110).

4. The cell edge passivation cassette according to any one of claims 1 to 3, characterized in that, The fixing assembly (40) includes a pressure plate (401), a guide rod (402), and a gripper (403); The receiving groove (20) is provided with a pressure plate (401) made of insulating material on the other side away from the tray (30). The pressure plate (401) is provided with a plurality of guide rods (402). All the guide rods (402) penetrate the side wall of the box body (10) away from the tray (30) and are connected to the gripper (403). The gripper (403) is used to connect to the robotic arm and drive the pressure plate (401) to move toward or away from the pallet (30) through the robotic arm.

5. The cell edge passivation cassette according to claim 4, characterized in that, Each guide rod (402) located between the pressure plate (401) and the corresponding side wall of the box body (10) is fitted with an elastic element (404).

6. The cell edge passivation cassette according to claim 4, characterized in that, The pressure plate (401) has multiple vertically arranged guide rods (402) on both sides along the direction that restricts the lateral displacement of the fixing component (40).

7. The cell edge passivation cassette according to claim 4, characterized in that, The gripper (403) has a connection interface (405) adapted to the robot arm.

8. The cell edge passivation cassette according to claim 1, characterized in that, The outer side walls of the box body (10) that restrict the lateral displacement of the fixing component (40) are respectively provided with at least one first electrode rod (70) and at least one second electrode rod (80); the box body (10) is provided with a first electrode plate (90) and a second electrode plate (100) at intervals above it. The first electrode rod (70) and the second electrode rod (80) are both used to conduct with the first electrode of the edge passivation boat (120); the first electrode plate (90) and the second electrode plate (100) are both used to conduct with the second electrode of the edge passivation boat (120).

9. The cell edge passivation cassette according to claim 8, characterized in that, The first electrode plate (90) is located above the second electrode plate (100).

10. An edge passivation device, characterized in that, The edge passivation device includes the cell edge passivation cassette as described in any one of claims 1 to 9.

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