Battery cell liquid injection hole cleaning device

Abstract

The utility model discloses a battery cell liquid injection hole cleaning device which is provided with two cleaning stations, the battery cell liquid injection hole cleaning device comprises a conveying mechanism and a cleaning assembly, the conveying mechanism is used for conveying a battery cell to be cleaned, and a conveying path of the conveying mechanism passes through the two cleaning stations; the cleaning assembly comprises a dry ice cleaning device and a laser cleaning device, and the dry ice cleaning device and the laser cleaning device are arranged corresponding to the two cleaning stations respectively so as to clean the liquid injection holes of the to-be-cleaned battery cells located at the cleaning stations. The problems that manpower is consumed and the cleaning effect is not ideal when the electrolyte on the battery cell liquid injection hole is cleaned manually are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid injection hole cleaning, in particular to a battery core liquid injection hole cleaning device. Background Art

[0002] Sealing pin welding is the last step in the battery cell assembly process, so the sealing pin welding yield has the greatest impact on the overall battery production cost. If welding problems such as cracks, burst points or pinholes occur, the reliability and safety of the entire battery will be affected. One of the important factors affecting the sealing pin welding effect is the cleanliness of the injection hole. Normally, electrolyte will remain on the surface of the battery cell injection hole after the injection is completed. The electrolyte that has been left for a long time will precipitate crystals and adhere to the area around the injection hole. The existing manual cleaning process consumes manpower and the effect is not ideal, and it cannot meet the needs of large-scale production. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery cell injection hole cleaning device, aiming to solve the problem that the existing manual cleaning of electrolyte on the battery cell injection hole is labor-intensive and has unsatisfactory cleaning effect.

[0004] In order to achieve the above-mentioned purpose, the battery cell injection hole cleaning device proposed in the utility model has two cleaning stations, and the battery cell injection hole cleaning device includes:

[0005] A conveying mechanism, used for conveying the battery cells to be cleaned, wherein the conveying path of the conveying mechanism passes through the two cleaning stations; and

[0006] The cleaning assembly comprises a dry ice cleaning device and a laser cleaning device, wherein the dry ice cleaning device and the laser cleaning device are respectively arranged corresponding to the two cleaning stations to clean the injection holes of the battery cells to be cleaned at the cleaning stations.

[0007] In one embodiment, on the conveying path of the conveying mechanism, the dry ice cleaning device is located upstream of the laser cleaning device.

[0008] In one embodiment, the direction of the conveying path of the conveying mechanism is a first direction;

[0009] The battery cell injection hole cleaning device is further provided with a clamping assembly corresponding to the cleaning station, the clamping assembly includes two clamping parts opposite to each other along the second direction to form a passing gap for the battery cell to be cleaned to pass through, and at least one of the clamping parts is movable along the second direction to change the size of the passing gap;

[0010] Wherein, the first direction and the second direction are arranged at an angle.

[0011] In one embodiment, the two clamping parts are movable along the second direction.

[0012] In one embodiment, the two clamping parts include a movable clamping part;

[0013] The clamping assembly further comprises a driving structure, and the driving structure is used for driving the movable clamping part to move.

[0014] In one embodiment, the driving structure includes a driving cylinder, a cylinder seat of the driving cylinder is fixed relative to the cleaning station, a cylinder rod of the driving cylinder moves along the second direction, and the movable clamping portion is arranged on the cylinder rod.

[0015] In one embodiment, the battery cell liquid injection hole cleaning device is further provided with a visual recognition device corresponding to the cleaning station, and the visual recognition device is electrically feedback-connected to the driving structure via a control device.

[0016] In one embodiment, the dry ice cleaning device comprises:

[0017] A dust accumulation structure is formed with a dust accumulation cavity and a clearance passage penetrating the dust accumulation cavity, wherein the clearance passage is used for allowing the battery cell to be cleaned to pass through the dust accumulation cavity; and

[0018] A dry ice cleaning gun is arranged on the dust accumulation structure, and a gun head of the dry ice cleaning gun extends into the dust accumulation chamber.

[0019] In one embodiment, the dry ice cleaning device further includes a dust removal structure, and the dust removal structure is connected to the dust accumulation chamber.

[0020] In one embodiment, a clearance hole is formed on the dust accumulation structure, and the clearance hole is arranged in an elongated shape in the second direction;

[0021] The dry ice cleaning gun is arranged through the clearance hole and can swing along the axis in the first direction to adjust the inclination angle relative to the battery cell to be cleaned;

[0022] Wherein, the first direction and the second direction are arranged at an angle.

[0023] In the technical solution provided by the utility model, the battery cell injection hole cleaning device has two cleaning stations, and the two cleaning stations are respectively provided with a dry ice cleaning device and a laser cleaning device. Under the conveying action of the conveying mechanism, the battery cell to be cleaned can reach the two stations in turn, so as to be cleaned by the dry ice cleaning mechanism and the laser cleaning device in turn. It can be understood that the dry ice cleaning device can clean up the large crystalline particles remaining on the surface of the injection hole of the battery cell to be cleaned through the principle of thermal expansion and contraction, and has the characteristics of high-speed and fast cleaning without damaging the substrate. After cleaning the crystalline particles and liquid residues, the laser cleaning device can also perform roughening treatment on the welding parts of the sealing pins, which is beneficial to the absorption of laser during laser welding, improves welding efficiency, and reduces heat input. The entire cleaning process is automatically completed under the cooperation of the conveying mechanism and the cleaning component, reducing manpower consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A schematic structural diagram of an embodiment of a battery cell liquid injection hole cleaning device provided by the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the dry ice cleaning device (partial structure cut out).

[0027] Description of Figure Numbers:

[0028] Label name Label name 100 Battery cell injection hole cleaning device 22 Laser cleaning device 1 Transmission mechanism 221 Laser Scanner 2 Cleaning components 3 Clamping components 21 Dry ice cleaning device 31 Clamping part 211 Dust accumulation structure 31a Active clamping part 211a Give way 32 Drive structure 211b Make way hole 32a Driving cylinder 212 Dry ice cleaning gun 200 Battery cells to be cleaned

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] Sealing pin welding is the last step in the battery cell assembly process, so the sealing pin welding yield has the greatest impact on the overall battery production cost. If welding problems such as cracks, burst points or pinholes occur, the reliability and safety of the entire battery will be affected. One of the important factors affecting the sealing pin welding effect is the cleanliness of the injection hole. Normally, electrolyte will remain on the surface of the battery cell injection hole after the injection is completed. The electrolyte that has been left for a long time will precipitate crystals and adhere to the area around the injection hole. The existing manual cleaning process consumes manpower and the effect is not ideal, and it cannot meet the needs of large-scale production.

[0034] Analysis of the above reasons shows that the use of an automated structure with multiple stations and a variety of cleaning methods to clean the battery cell injection holes in turn can reduce manpower consumption and improve the cleaning effect.

[0035] In view of this, the utility model proposes a battery cell injection hole cleaning device, which aims to solve the problem that the existing manual cleaning of the electrolyte on the battery cell injection hole is labor-intensive and has an unsatisfactory cleaning effect, wherein: Figure 1 A schematic structural diagram of an embodiment of a battery cell liquid injection hole cleaning device provided by the utility model; Figure 2 for Figure 1 Schematic diagram of the structure of the dry ice cleaning device (partial structure cut out).

[0036] See also Figure 1 and Figure 2The battery cell injection hole cleaning device 100 has two cleaning stations, and the battery cell injection hole cleaning device 100 includes a conveying mechanism 1 and a cleaning component 2. The conveying mechanism 1 is used to convey the battery cell 200 to be cleaned, and the conveying path of the conveying mechanism 1 passes through the two cleaning stations; the cleaning component 2 includes a dry ice cleaning device 21 and a laser cleaning device 22, and the dry ice cleaning device 21 and the laser cleaning device 22 are respectively arranged corresponding to the two cleaning stations to clean the injection holes of the battery cell 200 to be cleaned at the cleaning station.

[0037] It should be noted that the function of the conveying mechanism 1 is to transfer the battery cells 200 to be cleaned to various cleaning stations. There are many types of structures, such as a belt conveyor mechanism 1, a roller conveyor mechanism 1 or a double-speed chain, which is not limited in the embodiments of the present application; the function of the laser cleaning device 22 is to use laser to clean the residual crystal particles on the battery cells, which at least includes a laser galvanometer lens 221 and a fiber laser. The specific structure is not described in detail in this application.

[0038] In the technical solution provided by the utility model, the battery cell injection hole cleaning device 100 has two cleaning stations, and the two cleaning stations are respectively provided with a dry ice cleaning device 21 and a laser cleaning device 22. Under the conveying action of the conveying mechanism 1, the battery cell 200 to be cleaned can reach the two stations in turn, so as to be cleaned by the dry ice cleaning mechanism and the laser cleaning device 22 in turn. It can be understood that the dry ice cleaning device 21 can clean up the large crystalline particles remaining on the surface of the injection hole of the battery cell 200 to be cleaned through the principle of thermal expansion and contraction, and has the characteristics of high-speed and fast cleaning without damaging the substrate. After cleaning the crystalline particles and liquid residues, the laser cleaning device 22 can also perform roughening treatment on the welding part of the sealing pin, which is beneficial to the absorption of laser during laser welding, improves welding efficiency, and reduces heat input. The entire cleaning process is automatically completed under the cooperation of the conveying mechanism 1 and the cleaning component 2, thereby reducing manpower consumption.

[0039] The order in which the conveying mechanism 1 conveys the battery cell 200 to be cleaned through the two cleaning stations can be determined according to actual conditions. For example, the battery cell 200 can first pass through the cleaning station where the laser cleaning device 22 is located, and then pass through the cleaning station where the dry ice cleaning device 21 is located. In this embodiment, on the conveying path of the conveying mechanism 1, the dry ice cleaning device 21 is located upstream of the laser cleaning device 22. In this way, the battery cell 200 to be cleaned can first reach the cleaning station where the dry ice cleaning device 21 is located, and then reach the cleaning station where the laser cleaning device 22 is located. The dry ice cleaning device 21 can first clean the large crystal particles on the battery cell 200 to be cleaned, and the remaining small amount of stubborn residual particles can be accurately positioned and controllably cleaned by the laser cleaning device 22. After the battery cell 200 to be cleaned is completely cleaned, the roughening treatment performed by the laser cleaning device 22 is also more sufficient and thorough, thereby improving the welding efficiency.

[0040] It is understandable that the battery cell 200 to be cleaned needs to stay in the cleaning station to be cleaned, and there are many ways to position it to stay in the cleaning station, for example, it can be achieved by controlling the start and stop of the conveying mechanism 1, and in the present embodiment, the direction of the conveying path of the conveying mechanism 1 is the first direction; the battery cell injection hole cleaning device 100 is also provided with a clamping assembly 3 corresponding to the cleaning station, and the clamping assembly 3 includes two clamping parts 31 opposite to each other along the second direction to form a passing gap for the battery cell 200 to be cleaned to pass through, and at least one of the clamping parts 31 is movable along the second direction to change the size of the passing gap; wherein, the first direction is set at an angle to the second direction. According to the above technical solution, since the conveying path of the conveying mechanism 1 is in the first direction, by arranging two clamping parts 31 opposite to each other along the second direction at the cleaning station, when the conveying mechanism 1 conveys the battery cell 200 to be cleaned to the passing gap between the two clamping parts 31, the battery cell 200 to be cleaned can be clamped by driving the clamping parts 31, thereby positioning it at the cleaning station to wait for cleaning, thereby improving the degree of automation of cleaning the battery cell 200 to be cleaned.

[0041] In the method of implementing the clamping part 31 to clamp the battery cell 200 to be cleaned, one clamping part 31 can be set to be movable and the other clamping part 31 can be fixed. However, this method has a greater impact on the position of the battery cell 200 to be cleaned on the conveying mechanism 1, that is, it will push the battery cell 200 to be cleaned in the second direction, which is not conducive to the positioning of the battery cell 200 to be cleaned in other stations. In view of this, in some embodiments, both clamping parts 31 can be movable along the second direction. By setting the two clamping parts 31 to be movable, the battery cell 200 to be cleaned can be clamped and positioned at the midline position of the conveying mechanism 1, which is conducive to the positioning of the battery cell 200 to be cleaned in other stations. The simultaneous action of the two clamping parts 31 can clamp the battery cell 200 to be cleaned more quickly, so as to accurately retain it in the cleaning station.

[0042] In some technical solutions, the clamping part 31 can be driven manually, but this method has low working efficiency and consumes manpower. In some embodiments, the two clamping parts 31 include a movable clamping part 31a; the clamping assembly 3 also includes a driving structure 32, and the driving structure 32 is used to drive the movable clamping part 31a to move. The driving structure 32 automatically drives the movable clamping part 31a to move, which can further reduce the degree of human participation, improve working efficiency and reduce manpower consumption.

[0043] There are many driving forms of the driving structure 32, as long as it can complete the driving in the second direction, such as a servo drive motor, a linear drive module, etc. In this embodiment, the driving structure 32 includes a driving cylinder 32a, the cylinder seat of the driving cylinder 32a is fixed relative to the cleaning station, the cylinder rod of the driving cylinder 32a moves along the second direction, and the movable clamping part 31a is arranged on the cylinder rod. The driving cylinder 32a has a compact structure, is easy to maintain and repair, works safely and reliably, and can stably work in places with high dust concentration.

[0044] Generally speaking, the conventional conveying mechanism 1 has a low conveying accuracy, and simply controlling the start and stop of the conveying mechanism 1 to convey the battery cell 200 to the corresponding position of the cleaning station has high requirements for the conveying mechanism 1, and requires high design and manufacturing costs. In view of this, in some embodiments, the battery cell injection hole cleaning device 100 is also provided with a visual recognition device corresponding to the cleaning station, and the visual recognition device is electrically feedback-connected to the driving structure 32 through a control device. The visual recognition device can accurately identify the battery cell 200 to be cleaned, so as to timely feedback and control the action of the driving structure 32, so that the passing gap between the two clamping parts 31 is reduced, so that the battery cell 200 to be cleaned is accurately retained in the cleaning station, and the identification and positioning clamping of the battery cell 200 to be cleaned can be completed at a relatively low cost. At the same time, the visual recognition device can also identify the residual electrolyte crystals on the battery cell 200 to be cleaned, and can control the laser cleaning device 22 to accurately and efficiently remove the electrolyte crystals.

[0045] The main function of the dry ice cleaning device 21 is to spray dry ice particles, and there are many structures to achieve this function. In the present embodiment, the dry ice cleaning device 21 includes a dust accumulation structure 211 and a dry ice cleaning gun 212. The dust accumulation structure 211 is formed with a dust accumulation cavity and a clearance channel 211a running through the dust accumulation cavity. The clearance channel 211a is used for the battery cell 200 to be cleaned to pass through the dust accumulation cavity. The dry ice cleaning gun 212 is arranged on the dust accumulation structure 211, and the gun head of the dry ice cleaning gun 212 extends into the dust accumulation cavity. According to the above technical solution, the main function of spraying dry ice particles can be completed by using a dry ice cleaning gun 212, and the dust accumulation structure 211 is provided to confine the dust particles generated by dry ice cleaning in the dust accumulation chamber to prevent them from polluting the working environment, and the make way channel 211a is used for continuous passage of the battery cells 200 to be cleaned. Since the volume of the battery cells 200 to be cleaned is small, the amount of dust particles released through the make way channel 211a is small and has little impact on the working environment.

[0046] Furthermore, in some embodiments, the dry ice cleaning device 21 further includes a dust removal structure, which is connected to the dust storage chamber. Through the setting of the dust removal structure, the dust particles accumulated in the dust storage chamber can be collected in time to avoid excessive dust particles accumulating in the dust storage chamber and contaminating the electrolyte system of the battery cell.

[0047] Further, in some other embodiments, a clearance hole 211b is formed on the dust accumulation structure 211, and the clearance hole 211b is arranged in an elongated shape in the second direction; the dry ice cleaning gun 212 is arranged through the clearance hole 211b, and can swing along the axis of the first direction to adjust the tilt angle relative to the battery cell 200 to be cleaned; wherein, the first direction and the second direction are arranged at an angle. According to the above technical solution, since the first direction and the second direction are arranged at an angle, the clearance hole 211b is arranged in an elongated shape along the second direction, so that the dry ice cleaning gun 212 has sufficient clearance space in the clearance hole 211b when swinging along the axis of the first direction, so that the dry ice cleaning gun 212 can swing to an inclined angle with the battery cell 200 to be cleaned, and in the process of spraying dry ice particles, the dry ice particles can blow the stripped electrolyte liquid crystal particles away from the battery cell 200 to be cleaned in time, and this inclined spraying method can improve the cleaning efficiency.

[0048] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made under the concept of the present invention using the contents of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery cell injection hole cleaning device, characterized in that: There are two cleaning stations, and the battery cell injection hole cleaning device includes: A conveying mechanism, used for conveying the battery cells to be cleaned, wherein the conveying path of the conveying mechanism passes through the two cleaning stations; and The cleaning assembly comprises a dry ice cleaning device and a laser cleaning device, wherein the dry ice cleaning device and the laser cleaning device are respectively arranged corresponding to the two cleaning stations to clean the injection holes of the battery cells to be cleaned at the cleaning stations.

2. The battery cell injection hole cleaning device according to claim 1, characterized in that: On the conveying path of the conveying mechanism, the dry ice cleaning device is located upstream of the laser cleaning device.

3. The battery cell injection hole cleaning device according to claim 1, characterized in that: The direction of the conveying path of the conveying mechanism is a first direction; The battery cell injection hole cleaning device is further provided with a clamping assembly corresponding to the cleaning station, the clamping assembly includes two clamping parts opposite to each other along the second direction to form a passing gap for the battery cell to be cleaned to pass through, and at least one of the clamping parts is movable along the second direction to change the size of the passing gap; Wherein, the first direction and the second direction are arranged at an angle.

4. The battery cell injection hole cleaning device according to claim 3, characterized in that: The two clamping parts are both movable along the second direction.

5. The battery cell injection hole cleaning device according to claim 3, characterized in that: The two clamping parts include a movable clamping part; The clamping assembly further comprises a driving structure, and the driving structure is used for driving the movable clamping part to move.

6. The battery cell injection hole cleaning device according to claim 5, characterized in that: The driving structure comprises a driving cylinder, a cylinder seat of the driving cylinder is fixedly arranged relative to the cleaning station, a cylinder rod of the driving cylinder moves along the second direction, and the movable clamping part is arranged on the cylinder rod.

7. The battery cell injection hole cleaning device according to claim 5, characterized in that: The battery cell injection hole cleaning device is further provided with a visual recognition device corresponding to the cleaning station, and the visual recognition device is electrically feedback-connected to the driving structure through a control device.

8. The battery cell injection hole cleaning device according to claim 1, characterized in that: The dry ice cleaning device comprises: A dust accumulation structure is formed with a dust accumulation cavity and a clearance passage penetrating the dust accumulation cavity, wherein the clearance passage is used for allowing the battery cell to be cleaned to pass through the dust accumulation cavity; and A dry ice cleaning gun is arranged on the dust accumulation structure, and a gun head of the dry ice cleaning gun extends into the dust accumulation chamber.

9. The battery cell injection hole cleaning device according to claim 8, characterized in that: The dry ice cleaning device further includes a dust removal structure, and the dust removal structure is connected to the dust accumulation chamber.

10. The battery cell liquid injection hole cleaning device according to claim 8, characterized in that: The dust accumulation structure is formed with a clearance hole, and the clearance hole is arranged in an elongated shape in the second direction; The dry ice cleaning gun is arranged through the clearance hole and can swing along the axis in the first direction to adjust the inclination angle relative to the battery cell to be cleaned; Wherein, the first direction and the second direction are arranged at an angle.

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