A laser cleaning pressure plate assembly and a laser cleaning mechanism for an electrolyte injection port of a battery cell

Abstract

The utility model discloses a kind of laser cleaning pressure plate assemblies and electric core liquid injection port laser cleaning mechanism in the technical field of electric core cleaning;Pressure plate assembly includes pressure plate body and double-layer shell installed on the pressure plate body;Shell is double-layer structure, and bottom opening blow cavity is formed around between two layers;The inner cavity of shell is connected with negative pressure dust removal pipeline, and blow cavity is connected with blow pipeline;Pressure plate body and shell corresponding position are provided with through-hole for laser beam to enter and exit. Laser cleaning mechanism includes laser generator assembly, laser cleaning pressure plate assembly and electric core tray sequentially arranged from top to bottom. The above structure makes that electric core can greatly reduce the DMC solution remaining in the glue nail outside of liquid injection port during laser cleaning, to improve the purpose of cleaning effect, so as to ensure that subsequent welding process does not appear pinhole, protrusion and burst point and other defects due to more DMC solution remaining in the glue nail outside, improve the yield of electric core preparation.

Description

Technical Field

[0001] This utility model relates to a laser cleaning pressure plate assembly and a laser cleaning mechanism for the battery cell injection port, belonging to the field of battery cell cleaning technology. Background Technology

[0002] In today's advanced battery manufacturing field, the battery cell, as a core component, has a crucial impact on its performance, safety, and lifespan due to the welding quality of its sealing pins. The cleaning process of the cell's electrolyte filling port significantly affects the welding quality of these sealing pins. As battery technology continues to evolve towards higher energy density, higher stability, and longer lifespan, increasingly stringent requirements are being placed on the cleaning process of the cell's electrolyte filling port.

[0003] To achieve high-precision cleaning standards, the industry commonly employs multiple cleaning methods in tandem. These include DMC solution wiping and laser cleaning technology for multi-stage cleaning. DMC (dimethyl carbonate) solution wiping, with its excellent dissolving properties, effectively decomposes and removes various organic contaminants, salt crystals, and other impurities from the injection port surface, playing a crucial role in the initial cleaning stage. Laser cleaning technology, with its high energy density, high precision, and non-contact advantages, can perform deep cleaning of the injection port, precisely eliminating stubborn crystals and surface oxide layers, providing reliable assurance for the subsequent battery sealing and welding process. Therefore, it is typically used as the final cleaning method.

[0004] However, in actual production processes, certain defects were found in the above cleaning process: For example, in the DMC solution wiping and cleaning stage, although it can effectively remove most contaminants, the DMC solution can adhere to the adhesive pins on the injection port. That is, some DMC solution adheres to the surface of the adhesive pins and the surrounding area. Due to the covering effect of the adhesive pins, the cleaning trajectory during subsequent laser cleaning must avoid the adhesive pin area, and the laser cannot fully act on the covered area, resulting in DMC solution residue. This residual DMC solution will have a significant negative impact on subsequent welding processes. For example, during welding operations, the residual DMC solution will vaporize due to the high-temperature environment created by welding, resulting in a pressure difference between the sealed chamber formed between the sealing sheet and the cell injection port and the external environment. Consequently, under the action of air pressure, defects such as pinholes, protrusions, and craters are prone to appear at the weld. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a laser cleaning pressure plate assembly and a laser cleaning mechanism for the battery cell injection port. This allows the battery cell to significantly reduce the amount of DMC solution remaining on the outside of the injection port during the laser cleaning process, thereby improving the cleaning effect. This ensures that defects such as pinholes, protrusions, and blasting points will not occur during subsequent welding due to excessive DMC solution remaining on the outside of the injection port, thus improving the yield rate of battery cell manufacturing.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] In a first aspect, this utility model provides a laser cleaning pressure plate assembly, including a pressure plate body and a double-layer shell mounted on the pressure plate body;

[0008] The shell has a double-layer structure, with a blowing chamber with a bottom opening formed between the two layers; the inner cavity of the shell is connected to a negative pressure dust removal pipeline, and the blowing chamber is connected to the blowing pipeline.

[0009] The pressure plate body and the housing are provided with through holes at corresponding positions for the laser beam to enter and exit.

[0010] In the above solution, the design of combining the pressure plate body with the double-layer shell enables the simultaneous operation of air blowing and negative pressure dust removal. The bottom opening of the air blowing chamber can be directly aimed at the pollutant area to spray airflow, and the negative pressure dust removal pipeline can quickly remove the stripped debris, significantly improving the cleaning efficiency. The through hole allows the laser beam to penetrate without obstruction, ensuring precise focusing on the area to be cleaned and avoiding energy loss or secondary pollution caused by obstruction in traditional cleaning.

[0011] Furthermore, the housing includes an outer cavity and an inner cavity arranged sequentially from the outside to the inside; the through holes are respectively located in the middle of the inner cavity, the middle of the outer cavity, and on the pressure plate body at positions corresponding to the middle of the outer cavity and the middle of the inner cavity.

[0012] In the above scheme, the layered structure of the outer cavity and the inner cavity and the corresponding setting of the through holes ensure that the laser beam is completely aligned when passing through the shell, reducing the risk of optical path deviation and improving the cleaning positioning accuracy; at the same time, the separate design of the inner and outer cavities optimizes the independent control of air blowing and dust removal, avoiding airflow interference.

[0013] Furthermore, both the inner wall of the outer cavity and the outer wall of the inner cavity are configured as arc-shaped structures to form an annular air blowing chamber, which has multiple gas flow channels arranged in an annular pattern at equal intervals.

[0014] In the above scheme, the annular blowing chamber formed by the arc-shaped structure and the annular equidistant gas flow channels make the airflow evenly distributed around the object to be cleaned (rubber nails), eliminating cleaning dead corners; the annular airflow field can also form an enveloping effect, preventing pollutants from splashing and spreading, and enhancing the local cleaning effect.

[0015] Furthermore, the center of the inner wall of the outer cavity coincides with the center of the outer wall of the inner cavity.

[0016] In the above scheme, the concentric circle design of the outer cavity and the inner cavity ensures that the airflow is evenly output from the bottom of the blowing chamber, avoiding the problem of excessively strong or weak local airflow caused by structural eccentricity, and further improving the cleaning stability and consistency.

[0017] Furthermore, the center of the inner wall of the outer cavity is offset from the center of the outer wall of the inner cavity in the vertical direction, causing the inner diameter of the cross-section of the blowing chamber to decrease along the output direction.

[0018] In the above scheme, the design of the vertical offset of the center of the inner and outer cavities can make the inner diameter of the cross-section of the blowing chamber decrease along the output direction, forming a gradually narrowing airflow channel. According to the principle of gas flow, the airflow velocity can be accelerated and the impact force can be enhanced, effectively removing stubborn pollutants, so as to further improve the cleaning and drying effect of DMC residual solution on the outer wall of the glue nail.

[0019] Furthermore, multiple guide plates are arranged in a ring at equal intervals between the outer cavity and the inner cavity, and a gas flow channel is formed between two adjacent guide plates; the connection end of the air blowing pipe to the outer cavity is located above the multiple gas flow channels.

[0020] In the above scheme, the guide plate divides the blowing chamber into multiple equidistant gas channels, making the airflow distribution more uniform; the design of the blowing pipe connection end located above the channel utilizes the synergistic effect of gravity and airflow direction to reduce airflow turbulence and improve blowing efficiency.

[0021] Furthermore, a pipe is provided on one side of the inner cavity; one end of the pipe passes through the outer cavity to connect with the negative pressure dust removal pipeline.

[0022] In the above scheme, the pipeline runs through the outer cavity and connects to the negative pressure dust removal pipeline, directly forming a negative pressure area near the inner cavity, shortening the pollutant suction path, improving the dust removal response speed, and simplifying the pipeline layout and reducing structural complexity.

[0023] Furthermore, a connecting plate is provided at the bottom of the housing, and the connecting plate is provided with positioning holes for connecting to the pressure plate body by fasteners.

[0024] In the above solution, the design of the connecting plate and positioning hole enables the rapid and precise assembly of the housing and the pressure plate body, ensuring that the positions of the air blowing chamber and the through hole are strictly aligned; the fastener connection method enhances the overall structural rigidity and prevents component displacement caused by vibration during the cleaning process.

[0025] Secondly, this utility model also provides a laser cleaning mechanism for the battery cell injection port, including a laser generator assembly, the laser cleaning pressure plate assembly described in the first aspect, and a battery cell tray arranged sequentially from top to bottom.

[0026] The laser generator assembly is used to output a laser beam that passes through the through hole to clean contaminants around the cell's electrolyte filling port;

[0027] The laser cleaning pressure plate assembly is bonded to the battery cell;

[0028] The cell tray is used to support and hold the cells.

[0029] In the above scheme, a closed-loop cleaning system is formed by integrating the laser generator assembly, the laser cleaning pressure plate assembly, and the cell tray. By integrating the air blowing pipeline onto the pressure plate body, the laser cleaning and the removal of residual DMC solution on the outside of the injection port glue nail can be carried out simultaneously. Compared with the independent operation mode, this device can effectively shorten the production process and increase the production rate of cell preparation.

[0030] Furthermore, the axis of the through hole and the rubber nail on the cell's liquid injection port are located in the same vertical plane, and the opening of the air blowing chamber faces the rubber nail at the cell's liquid injection port.

[0031] The above technical solution enables the air blowing pipeline to output gas from the air blowing chamber to the glue pins set on the liquid injection port of the battery cell when the pressure plate body is attached and positioned for laser cleaning. This dries and cleans the residual DMC solution on the outside of the glue pins by blowing. At the same time, the negative pressure dust removal pipeline simultaneously extracts impurities and harmful gases generated during the laser cleaning process, as well as DMC gas generated during the drying process in the air blowing chamber, to prevent secondary contamination. During this process, the blowing operation of the air blowing pipeline can greatly reduce the residual DMC solution on the outside of the glue pins, thus improving the cleaning effect. This ensures that defects such as pinholes will not occur during subsequent welding due to a large amount of residual DMC solution on the outside of the glue pins, thereby improving the yield of battery cell manufacturing.

[0032] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0033] The laser cleaning pressure plate assembly of this utility model achieves highly efficient synergy between air blowing to remove contaminants and negative pressure suction through an integrated design of the pressure plate body and a double-layer shell, combined with the synchronous action of the air blowing chamber, negative pressure dust removal pipeline, and air blowing pipeline. The bottom opening of the air blowing chamber directly covers the cleaning area, the air blowing pipeline provides directional airflow to impact contaminants, and the negative pressure dust removal pipeline quickly removes debris, preventing secondary adhesion. The through-hole design ensures that the laser beam can penetrate the pressure plate body and shell without obstruction, precisely targeting the battery cell injection port, ensuring effective utilization of laser energy and simplifying the optical path structure. This solution significantly improves cleaning efficiency and quality through the triple linkage of blowing, suction, and laser cleaning, while maintaining a compact structure to adapt to different working conditions.

[0034] The laser cleaning mechanism for the battery cell injection port described in this utility model integrates a laser generator assembly, a laser cleaning pressure plate assembly, and a battery cell tray to form a closed-loop cleaning system. The laser precisely acts on the rubber nails at the injection port, while air blowing and negative pressure simultaneously remove contaminants. The battery cell tray fixes the position of the battery cell. The three components work together to achieve efficient, non-destructive, and automated cleaning, which is suitable for the needs of large-scale production lines. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a laser cleaning pressure plate assembly provided in Embodiment 1;

[0036] Figure 2 This is a cross-sectional view of a laser cleaning pressure plate assembly provided in Embodiment 1;

[0037] Figure 3 This is a gas flow diagram of a laser cleaning pressure plate assembly provided in Example 1;

[0038] Figure 4 This is a cross-sectional view of a laser cleaning pressure plate assembly provided in Embodiment 2;

[0039] Figure 5 This is a schematic diagram of a laser cleaning mechanism for the battery cell injection port provided in Example 3.

[0040] In the diagram: 1. Pressure plate body; 2. Housing; 21. Outer cavity; 22. Inner cavity; 3. Negative pressure dust removal pipeline; 4. Air blowing pipeline; 5. Air blowing chamber; 51. Gas flow channel; 6. Through hole; 7. Guide plate; 8. Pipe; 9. Connecting plate; 10. Laser generator assembly; 11. Laser cleaning pressure plate assembly; 12. Battery cell tray. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] Example 1

[0045] like Figures 1 to 3 As shown, this embodiment provides a laser cleaning pressure plate assembly 11 for cleaning the battery cell liquid injection port, including a pressure plate body 1, a housing 2, a negative pressure dust removal pipeline 3, and an air blowing pipeline 4.

[0046] like Figure 1 and Figure 2 As shown, in this embodiment, the housing 2 is detachably mounted on the pressure plate body 1. Specifically, a connecting plate 9 is provided at the bottom of the housing 2, and the connecting plate 9 is provided with positioning holes for connection to the pressure plate body 1 via fasteners. The housing 2 has a double-layer structure, including an outer cavity 21 and an inner cavity 22 arranged sequentially from the outside to the inside; a blow-air chamber 5 with a bottom opening is formed between the outer cavity 21 and the inner cavity 22. In use, the pressure plate body 1 is attached to the battery cell, and the opening of the blow-air chamber 5 faces the glue pin at the battery cell's liquid injection port. That is, the gas formed in the blow-air chamber 5 dries and cleans the DMC solution remaining on the outer wall of the glue pin, so as to ensure that the residual DMC solution will not be unable to be cleaned due to the glue pin blocking the laser cleaning process.

[0047] The inner cavity 22, the outer cavity 21, and the pressure plate body 1 are all provided with through holes 6 for the laser beam to enter and exit. That is, the laser beam generated by the laser generator passes through the through holes 6 in a vertical direction to perform laser cleaning on the battery cell.

[0048] like Figure 2 As shown, in this embodiment, the negative pressure dust removal pipeline 3 is connected to the inner cavity 22 via the pipe 8 and communicates with the inner cavity of the housing 2 to extract impurities, harmful gases, and the gas mixture formed by the gas output from the blowing chamber 5 and the residual DMC solution on the outside of the glue nail during the laser cleaning process, ensuring that the impurities, harmful gases, and gas mixtures do not re-adhere to the area around the battery cell injection port. The pipe 8 is located on one side of the inner cavity 22, and one end of it penetrates the outer cavity 21 to connect with the negative pressure dust removal pipeline 3. The blowing pipeline 4 communicates with the blowing chamber 5, providing a gas source for the gas output from the blowing chamber 5.

[0049] like Figure 3 As shown in the figure, in this embodiment, the gas path formed by the air blowing pipe 4 is shown by the solid arrow in the figure, while the gas path when the negative pressure dust removal pipe 3 is evacuating is shown by the dashed arrow in the figure. This ensures that the air blowing pipe 4 and the negative pressure dust removal pipe 3 operate independently of each other. During the laser cleaning process, the residual DMC solution on the outside of the glue nail can be effectively dried and cleaned, thereby effectively avoiding defects such as pinholes and protrusions in the weld due to a large amount of residual DMC solution on the outer wall of the glue nail during the subsequent welding process.

[0050] The pressure plate assembly provided in this embodiment comprises a pressure plate body 1, a housing 2, a negative pressure dust removal pipeline 3, and an air blowing pipeline 4. The housing 2 includes an outer cavity 21 and an inner cavity 22, with the inner cavity 22 connected to the negative pressure dust removal pipeline 3. The air blowing chamber 5 between the inner cavity 22 and the outer cavity 21 is connected to the air blowing pipeline 4. This allows the air blowing pipeline 4 to output gas from the air blowing chamber 5 to the adhesive nails located on the liquid injection port of the battery cell when the pressure plate body 1 is used for laser cleaning. This allows the gas to be dried off any residue on the outside of the adhesive nails. The DMC solution is dried and cleaned. At the same time, the impurities and harmful gases formed during the laser cleaning process, as well as the DMC gas formed during the drying process in the air blowing chamber 5, are simultaneously extracted by the negative pressure dust removal pipeline 3 to prevent secondary contamination. During this process, the air blowing operation of the air blowing pipeline 4 can greatly reduce the DMC solution remaining on the outside of the glue nail, thus achieving the purpose of improving the cleaning effect. It can also effectively ensure that defects such as pinholes will not occur in the subsequent welding process due to a large amount of DMC solution remaining on the outside of the glue nail, thereby improving the yield of battery cell manufacturing.

[0051] Furthermore, by integrating the air blowing pipe 4 onto the pressure plate body 1, laser cleaning and cleaning of residual DMC solution on the outside of the glue nails can be carried out simultaneously. Compared with independent operation, this device can effectively shorten the production cycle and increase the production rate of battery cell manufacturing.

[0052] In a further embodiment, the relative positional relationship between the through hole 6 and the battery cell injection port glue pin is further defined.

[0053] Specifically, the axis of the through hole 6 is located in the same vertical plane as the glue nail on the battery cell injection port, and the air blowing chamber 5 is set as an annular structure with multiple annularly spaced gas channels 51. This allows the gas to simultaneously dry and clean the outer wall of the glue nail in multiple directions when the air blowing pipe 4 is injected (i.e., it is transmitted through multiple gas channels 51), thereby shortening the drying time and effectively avoiding the occurrence of inadequate local cleaning.

[0054] Specifically, multiple guide plates 7 are arranged in a ring at equal intervals between the outer cavity 21 and the inner cavity 22, and a gas flow channel 51 is formed between two adjacent guide plates 7. The connection end of the air blowing pipe 4 to the outer cavity 21 is located above the multiple gas flow channels 51, so that the dry gas output by the air blowing pipe 4 can be diverted into the gas flow channel 51 under the action of the multiple guide plates 7, thereby improving the subsequent drying and cleaning effect of the residual DMC solution on the outside of the glue nail.

[0055] To facilitate the formation of a better annular structure for the air-blowing chamber 5 and improve the cleaning effect, the shapes of the outer cavity 21 and the inner cavity 22 are further defined.

[0056] Specifically, the inner wall of the outer cavity 21 and the outer wall of the inner cavity 22 are both configured as arc-shaped structures to form the air blowing chamber 5 with an annular structure.

[0057] In this embodiment, the center of the inner wall of the outer cavity 21 coincides with the center of the outer wall of the inner cavity 22.

[0058] Example 2

[0059] This embodiment provides a laser cleaning pressure plate assembly 11 for cleaning the electrolyte injection port of the battery cell.

[0060] like Figure 4As shown, in this embodiment, in order to increase the output flow rate of the gas and further improve the drying and cleaning effect of the DMC solution remaining on the outside of the glue nails, based on Embodiment 1, the center of the inner wall of the outer cavity 21 and the center of the outer wall of the inner cavity 22 are offset in the vertical direction, so that the inner diameter of the cross-section of the blowing chamber 5 decreases along the output direction. According to the principle of gas flow, when the gas flow rate is constant, the cross-sectional area of ​​its outlet gradually decreases, and the gas flow rate will increase accordingly. Thus, through this setting, the gas flow rate is increased, thereby further improving the cleaning and drying effect of the DMC solution remaining on the outside of the glue nails.

[0061] Apart from the features described above, the other technical features of this embodiment are the same as those in Embodiment 1. For details not described in this embodiment, please refer to Embodiment 1.

[0062] Example 3

[0063] This embodiment provides a laser cleaning mechanism for the electrolyte filling port of a battery cell, such as... Figure 5 As shown, it includes a laser generator assembly 10, a laser cleaning pressure plate assembly 11 as described in Embodiment 1 or Embodiment 2, and a battery cell tray 12 arranged sequentially from top to bottom.

[0064] In this embodiment, the laser generator assembly 10 is used to output a laser beam that passes through the through hole 6 to clean contaminants around the battery cell injection port, and the battery cell tray 12 is used to support and hold the battery cell so that the battery cell remains relatively fixed during the cleaning process.

[0065] It should be noted that the battery cell tray and laser generator assembly are existing technologies, so they will not be described in detail here.

[0066] This device adds an air blowing pipe 4 to the traditional laser cleaning mechanism for drying the residual DMC solution on the outside of the glue nails. An air blowing chamber 5 is formed in the housing 2 that is connected to the air blowing pipe 4. This allows for targeted cleaning and drying of the residual DMC solution on the outside of the glue nails during the laser cleaning process. This effectively avoids defects such as pinholes, protrusions, and blast points in the weld caused by excessive DMC solution residue at the glue nails during subsequent welding, thereby improving the yield rate of the battery cells.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A laser cleaning pressure plate assembly, characterized in that, It includes a pressure plate body (1) and a housing (2) mounted on the pressure plate body (1); The shell (2) has a double-layer structure, with a bottom-opening air-blowing chamber (5) formed between the two layers; the inner cavity of the shell (2) is connected to the negative pressure dust removal pipeline (3), and the air-blowing chamber (5) is connected to the air-blowing pipeline (4). The pressure plate body (1) and the housing (2) are provided with through holes (6) at corresponding positions for the laser beam to enter and exit.

2. The laser cleaning pressure plate assembly according to claim 1, characterized in that, The housing (2) includes an outer cavity (21) and an inner cavity (22) arranged sequentially from the outside to the inside; the through holes (6) are respectively arranged in the middle of the inner cavity (22), the middle of the outer cavity (21), and the position on the pressure plate body (1) corresponding to the middle of the outer cavity (21) and the middle of the inner cavity (22).

3. The laser cleaning pressure plate assembly according to claim 2, characterized in that, The inner wall of the outer cavity (21) and the outer wall of the inner cavity (22) are both set as arc-shaped structures to form the air blowing chamber (5) with an annular structure. The air blowing chamber (5) has a plurality of gas flow channels (51) arranged in an annular shape at equal intervals.

4. The laser cleaning pressure plate assembly according to claim 3, characterized in that, The center of the inner wall of the outer cavity (21) coincides with the center of the outer wall of the inner cavity (22).

5. The laser cleaning pressure plate assembly according to claim 3, characterized in that, The center of the inner wall of the outer cavity (21) is offset from the center of the outer wall of the inner cavity (22) in the vertical direction, so that the inner diameter of the cross-section of the blowing chamber (5) decreases along the output direction.

6. The laser cleaning pressure plate assembly according to claim 3, characterized in that, Multiple guide plates (7) are arranged in a ring at equal intervals between the outer cavity (21) and the inner cavity (22), and a gas flow channel (51) is formed between two adjacent guide plates (7); the connection end of the air blowing pipe (4) and the outer cavity (21) is located above the multiple gas flow channels (51).

7. The laser cleaning pressure plate assembly according to claim 2, characterized in that, A pipe (8) is provided on one side of the inner cavity (22); one end of the pipe (8) passes through the outer cavity (21) to connect with the negative pressure dust removal pipeline (3).

8. The laser cleaning pressure plate assembly according to claim 1, characterized in that, The bottom of the housing (2) is provided with a connecting plate (9), and the connecting plate (9) is provided with positioning holes for connecting to the pressure plate body (1) by fasteners.

9. A laser cleaning mechanism for the electrolyte filling port of a battery cell, characterized in that, It includes a laser generator assembly (10), a laser cleaning pressure plate assembly (11) according to any one of claims 1-8, and a battery cell tray (12) arranged sequentially from top to bottom. The laser generator assembly (10) is used to output a laser beam that passes through the through hole (6) to clean contaminants around the cell filling port; The laser cleaning plate assembly (11) is bonded to the battery cell; The cell tray (12) is used to support and hold the cells.

10. The cell liquid injection port laser cleaning mechanism according to claim 9, characterized in that, The axis of the through hole (6) is in the same vertical plane as the glue pin on the cell liquid injection port, and the opening of the air blowing chamber (5) faces the glue pin of the cell liquid injection port.

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