Multi-station cleaning device

Abstract

The utility model relates to the technical field of laser cleaning, and provides a multi-station cleaning device which comprises a first cleaning mechanism and a second cleaning mechanism, the first cleaning mechanism is used for cleaning electrolyte around a battery liquid injection hole for the first time, and the periphery of the battery liquid injection hole is cooled during cleaning; the second cleaning mechanism comprises a laser, a beam expander, a reflector set and at least one galvanometer, and the laser, the beam expander and the reflector set are sequentially arranged in the light propagation direction; the reflecting mirror group is used for reflecting incident light to the galvanometer, the reflecting mirror group comprises a plurality of reflecting mirrors, each reflecting mirror corresponds to one cleaning station, the last reflecting mirror is a total reflecting mirror along the propagation direction of the light, and the residual electrolyte around the liquid injection hole is subjected to secondary cleaning by laser through the galvanometer. According to the multi-station cleaning device, the batteries on the multiple cleaning stations can be cleaned at the same time, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cleaning, in particular to a multi-station cleaning device. Background Art

[0002] Sealing pin welding is the last step in the battery cell assembly process. The sealing pin welding yield has the greatest impact on the overall battery production cost. If 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 around the injection hole.

[0003] The cap is provided with an injection hole. After the injection hole is filled, some electrolyte will remain around the injection hole. Usually, a physical method is used to wipe the residual electrolyte around the injection hole. This process is labor-intensive and has low cleaning efficiency, and cannot meet the needs of large-scale production. Utility Model Content

[0004] The utility model provides a multi-station cleaning device, which is used to solve the defect of low cleaning efficiency of electrolyte in the prior art.

[0005] The utility model provides a multi-station cleaning device, comprising: a first cleaning mechanism, used for cleaning the electrolyte around the battery filling hole once, and cooling the area around the battery filling hole during cleaning; a second cleaning mechanism, comprising: a laser, a beam expander, a reflector group and at least one galvanometer, wherein the laser, the beam expander and the reflector group are arranged in sequence along the propagation direction of the light; the reflector group is used for reflecting the incident light to the galvanometer, the reflector group comprises a plurality of reflectors, each of the reflectors corresponds to a cleaning station, and along the propagation direction of the light, the last reflector is a total reflector, and the laser performs secondary cleaning on the electrolyte remaining around the filling hole through the galvanometer.

[0006] According to a multi-station cleaning device provided by the utility model, the number of the galvanometer mirrors is one, and the remaining reflectors in the reflector group are all semi-transparent mirrors; each reflector is used to reflect part of the incident light to the galvanometer mirror, and part of the incident light passes through the reflector and is incident on the next reflector.

[0007] According to a multi-station cleaning device provided by the utility model, each reflector in the reflector group is arranged at a different angle.

[0008] According to a multi-station cleaning device provided by the utility model, it also includes a plurality of rotating parts, each of the reflectors is arranged on one of the rotating parts, and when the rotating parts rotate, they can drive the reflectors to rotate so as to adjust the setting angle of the reflectors.

[0009] According to a multi-station cleaning device provided by the utility model, the power of the laser is proportional to the number of the reflectors in the reflector group.

[0010] According to a multi-station cleaning device provided by the utility model, the number of the galvanometer is one, and the multiple reflectors in the reflector group are arranged in parallel; the multi-station cleaning device also includes a first driver, which is connected to the galvanometer, and the first driver is used to drive the galvanometer to move between the multiple cleaning stations.

[0011] According to a multi-station cleaning device provided by the utility model, it also includes at least one second driver. Along the propagation direction of the light, except for the last reflector, each of the reflectors is connected to a second driver. The second driver is used to drive the reflectors to move to avoid the light and make the light enter the reflector facing the target cleaning station. The galvanometer is located at the target cleaning station.

[0012] According to a multi-station cleaning device provided by the utility model, the remaining reflectors in the reflector group are total reflectors.

[0013] According to a multi-station cleaning device provided by the utility model, the second driver is used to drive the reflecting mirror to move up and down or forward and backward.

[0014] According to a multi-station cleaning device provided by the utility model, there are multiple galvanometers, and each of the galvanometers is arranged above a cleaning station; the multiple reflectors in the reflector group are arranged in parallel, and each of the reflectors is arranged opposite to a galvanometer, and each of the reflectors is a full-reflection mirror; the multi-station cleaning device also includes multiple third drivers, and except for the last reflector, each of the third drivers is connected to a reflector, and the third driver is used to drive the reflector to move to avoid light.

[0015] The multi-station cleaning device provided by the utility model is provided with a first cleaning mechanism and a second cleaning mechanism. The first cleaning mechanism can quickly remove most of the liquid electrolyte or the solid electrolyte to shorten the duration of the secondary cleaning and improve the efficiency of the electrolyte cleaning; and while removing the electrolyte, the temperature around the injection hole can be reduced, reducing the temperature rise during the secondary cleaning, thereby avoiding the influence of high temperature on the insulating rubber plug during the secondary cleaning and ensuring the sealing performance of the insulating rubber plug; at the same time, the first cleaning mechanism is used for cleaning during the first cleaning, and the cleaning speed is fast without damaging the substrate; the second cleaning mechanism is used for cleaning during the second cleaning, which can make the area around the injection hole roughened, and when the sealing pin is welded, the roughened surface is conducive to laser absorption, thereby improving the welding efficiency; a reflector group and a galvanometer are provided in the second cleaning mechanism, and the reflector group can reflect the light emitted by the laser into the galvanometer, so that the batteries on multiple cleaning stations can be cleaned at the same time, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the multi-station cleaning device provided by the utility model;

[0018] Figure 2 This is the second structural schematic diagram of the multi-station cleaning device provided by the utility model;

[0019] Figure 3 This is the third structural schematic diagram of the multi-station cleaning device provided by the utility model;

[0020] Figure 4 This is the fourth structural schematic diagram of the multi-station cleaning device provided by the utility model;

[0021] Reference numerals:

[0022] 10. Laser; 20. Beam expander; 31. First reflector; 32. Second reflector; 40. Galvanometer; 41. First galvanometer; 42. Second galvanometer; 51. First cleaning station; 52. Second cleaning station. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] The features of the terms "first" and "second" in the specification and claims of the utility model may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0025] Combine the following Figure 1-Figure 4 The utility model describes a multi-station cleaning device.

[0026] like Figure 1-Figure 4 As shown, in an embodiment of the utility model, the multi-station cleaning device includes: a first cleaning mechanism and a second cleaning mechanism. The first cleaning mechanism is used to clean the electrolyte around the battery injection hole once, and cool the area around the battery injection hole while cleaning. The second cleaning mechanism includes: a laser 10, a beam expander 20, a reflector group and at least one galvanometer 40. Along the propagation direction of the light, the laser 10, the beam expander 20 and the reflector group are arranged in sequence. The reflector group is used to reflect the incident light to the galvanometer 40. The reflector group includes a plurality of reflectors, each of which corresponds to a cleaning station. Along the propagation direction of the light, the last reflector is a full reflector. The galvanometer 40 is arranged above the plurality of cleaning stations, and the laser performs a secondary cleaning of the electrolyte remaining around the injection hole through the galvanometer 40.

[0027] Specifically, after the liquid is injected through the injection hole, a certain amount of electrolyte will remain on the surface of the battery, and the battery is transferred to the first cleaning mechanism, which cleans the electrolyte around the battery injection hole. In this embodiment, the first cleaning mechanism uses the principle of thermal expansion and contraction to clean the electrolyte, and it can cool the area around the injection hole while cleaning. After the first cleaning mechanism removes most of the electrolyte around the injection hole, the battery is transferred to the second cleaning mechanism, and the second cleaning mechanism performs fine cleaning on the remaining residual electrolyte to remove all electrolyte on the battery surface.

[0028] In this embodiment, the first cleaning mechanism is a dry ice cleaning mechanism. Since the boiling point of carbon dioxide is extremely low, dry ice particles will produce a sharp temperature change after contacting the stains, causing the stains to shrink and loosen. The dry ice cleaning mechanism can not only clean the liquid electrolyte, but also remove the solid electrolyte. After the liquid electrolyte is left for a long time, crystals will precipitate and adhere to the surrounding of the injection hole. Such crystals are extremely difficult to clean, and the use of dry ice cleaning can quickly clean the crystals without damaging the surface substrate of the battery. At the same time, the dry ice cleaning method is used to clean the area around the injection hole. While cleaning, it can reduce the temperature around the injection hole, so that the battery surface has a lower temperature. This cleaning method will not generate high temperature during the cleaning process, so there will be no problem of damage to the insulating rubber plug due to high temperature.

[0029] After the first cleaning mechanism removes most of the electrolyte, the battery is transferred to the second cleaning mechanism. In this embodiment, the second cleaning mechanism is a laser cleaning mechanism. Since the battery surface has a lower temperature after dry ice cleaning, laser cleaning is used to perform a secondary cleaning of the residual electrolyte. During the cleaning process, the temperature rise around the injection hole is slow, and a high temperature will not be generated. In addition, there is less electrolyte remaining on the battery surface. The second cleaning mechanism only performs local cleaning, and the cleaning time is short, which will also reduce the temperature rise, thereby reducing the impact of the high temperature generated during laser cleaning on the performance of the insulating rubber plug. At the same time, laser cleaning is used during the secondary cleaning, and the area around the injection hole can also be roughened, so that in the subsequent process, the sealing nail and the injection hole are more closely fitted when sealed and welded, thereby improving the welding quality.

[0030] In order to improve the cleaning efficiency of the battery injection hole, multiple cleaning stations can be set to clean multiple batteries at the same time. In this embodiment, the light emitted by the laser 10 passes through the beam expander 20 and then enters the reflector group, which reflects the light to the galvanometer 40. The galvanometer 40 is located above the multiple cleaning stations, so that multiple batteries can be laser cleaned at the same time to improve the cleaning efficiency of the battery injection hole.

[0031] The reflector group includes a plurality of reflectors. Along the propagation direction of the light, except for the last reflector which is a full reflector, the remaining reflectors are all semi-transparent mirrors. The light incident on the semi-transparent mirror is partially reflected by the semi-transparent mirror to the galvanometer 40, and partially passes through the semi-transparent mirror to the next reflector, is reflected on the next reflector, and is incident on the galvanometer 40. The light propagates in this way, so that the batteries located at multiple cleaning stations can be cleaned.

[0032] In the above embodiment, the number of the galvanometer mirrors 40 can be one or more. When the number of the galvanometer mirrors 40 is one, the reflected light of each reflector is incident on the galvanometer mirror 40, so that the batteries on multiple cleaning stations can be cleaned; when the number of the galvanometer mirrors 40 is multiple, each reflector corresponds to a galvanometer mirror 40, and the reflected light of each reflector is incident on the corresponding galvanometer mirror 40 to clean the batteries on the cleaning station opposite to the galvanometer mirror 40, and it can also be achieved that the batteries on multiple cleaning stations can be cleaned at the same time.

[0033] The multi-station cleaning device provided by the embodiment of the utility model is provided with a first cleaning mechanism and a second cleaning mechanism. The first cleaning mechanism can quickly remove most of the liquid electrolyte or solid electrolyte to shorten the duration of the secondary cleaning and improve the efficiency of the electrolyte cleaning; and while removing the electrolyte, the temperature around the injection hole can be reduced, reducing the temperature rise during the secondary cleaning, thereby avoiding the influence of high temperature on the insulating rubber plug during the secondary cleaning and ensuring the sealing performance of the insulating rubber plug; at the same time, the first cleaning mechanism is used for cleaning during the first cleaning, and the cleaning speed is fast and does not damage the substrate. The second cleaning mechanism is used for cleaning during the second cleaning, which can roughen the area around the injection hole. When the sealing pin is welded, the roughened surface is conducive to laser absorption, thereby improving the welding efficiency; a reflector group and a galvanometer are provided in the second cleaning mechanism, and the reflector group can reflect the light emitted by the laser into the galvanometer, so that the batteries on multiple cleaning stations can be cleaned at the same time, thereby improving the cleaning efficiency.

[0034] like Figure 1 and Figure 2 As shown, in one embodiment of the utility model, the number of the galvanometer 40 is one, and except for the last reflector in the reflector group, the remaining reflectors are semi-transmissive mirrors, and each reflector is used to reflect part of the incident light to the galvanometer 40, and part of the incident light passes through the reflector and is incident on the next reflector.

[0035] Figure 1 and Figure 2 Two configuration modes of the reflector group are provided when the number of the galvanometer mirror 40 is one. For ease of description, only two cleaning stations are shown in the figure, and accordingly, the number of the reflectors in the reflector group is also two.

[0036] exist Figure 1 and Figure 2 In the embodiment shown, each reflector in the reflector group is set at a different angle, so that part of the light incident on each reflector can be reflected to the galvanometer 40. Specifically, along the propagation direction of the light, the inclination angle of the side of each reflector adjacent to the beam expander 20 and the horizontal plane increases or decreases, that is, Figure 1 and Figure 2In the illustrated embodiment, the inclination angle of each reflector in the reflector group relative to the horizontal plane is different.

[0037] Furthermore, in the above-described embodiment, the multi-station cleaning device also includes a plurality of rotating parts, and each reflector is arranged on a rotating part. When the rotating part rotates, it can drive the reflector to rotate to adjust the setting angle of the reflector, so that part of the light incident on each reflector can be reflected to the same galvanometer 40, so as to realize the simultaneous cleaning of multiple batteries with only one galvanometer 40.

[0038] The multi-station cleaning device provided by the embodiment of the utility model can realize the simultaneous cleaning of multiple batteries with only one galvanometer by setting the inclination angle of each reflector in the reflector group to be different. While improving the cleaning efficiency, it simplifies the structure of the cleaning device and reduces the production cost.

[0039] Since only part of the light emitted by the laser 10 is reflected to the galvanometer 40 after passing through a reflector, the power of the galvanometer 40 will be reduced when cleaning the battery on the cleaning station opposite to it. Specifically, if the reflector group includes a first reflector 31 and a second reflector 32, when the light passes through the first reflector 31, part of the light will penetrate through the first reflector 31 and enter the second reflector 32, and when the galvanometer 40 cleans the battery located at the first cleaning station 51, its cleaning ability will be reduced; correspondingly, since the light entering the second reflector 32 is also part of the light, the light reflected to the galvanometer 40 by the second reflector 32 is less and has lower power, and when the galvanometer 40 cleans the battery located at the second cleaning station, its cleaning ability is worse. Based on this, in an embodiment of the present utility model, the power of the laser 10 is proportional to the number of reflectors in the reflector group. The more reflectors there are in the reflector group, the greater the power of the laser 10 is, so as to ensure that the galvanometer 40 has sufficient cleaning ability in each cleaning station, thereby ensuring the cleaning effect of the battery.

[0040] like Figure 3 As shown, in another embodiment of the utility model, a plurality of reflectors in the reflector group are arranged in parallel. The multi-station cleaning device further comprises a first driver connected to the galvanometer 40, and the first driver is used to drive the galvanometer 40 to move between the plurality of cleaning stations.

[0041] Specifically, in this embodiment, since the setting angles of the multiple reflectors in the reflector group are the same, the reflected light on each reflector is parallel. When the size of the galvanometer 40 is small, the reflected light of each reflector may not be able to enter the galvanometer 40. Based on this, in this embodiment, the galvanometer 40 is set to be movable along multiple cleaning stations to clean the batteries on the target cleaning station. Specifically, it is assumed that the reflector group includes two reflectors, namely the first reflector 31 and the second reflector 32. The first reflector 31 can be a semi-mirror, and the second reflector 32 is a full-mirror. The first reflector 31 is opposite to the first cleaning station 51, and the second reflector 32 is opposite to the second cleaning station 52. In this embodiment, by setting a first driver, the galvanometer 40 can be driven to move between the first cleaning station 51 and the second cleaning station 52. When there is a battery to be cleaned at a certain cleaning station, the galvanometer 40 can be moved to the cleaning station to clean the battery located at the cleaning station.

[0042] It can be understood that when the number of cleaning stations is large, the batteries on multiple cleaning stations can be selectively cleaned by driving the galvanometer 40 to move, thereby enhancing the applicability of the cleaning device.

[0043] The multi-station cleaning device provided by the embodiment of the utility model can drive the galvanometer to move between multiple cleaning stations by setting a first driver, so as to clean the battery located at the current cleaning station, thereby realizing selective cleaning.

[0044] Furthermore, when all the reflectors in the reflector group are full reflectors, the light incident on the reflector will be completely reflected to the galvanometer 40, and the power of the laser 10 will not be lost, thereby ensuring the cleaning effect. However, the disadvantage of this arrangement is that when it is necessary to clean the battery on the second cleaning station 52, the first reflector 31 will reflect the light, so that the light cannot be incident on the second reflector 32. Based on this, the multi-station cleaning device provided by the embodiment of the utility model also includes at least one second driver. Along the propagation direction of the light, except for the last reflector, each reflector is connected to a second driver, and the second driver is used to drive the reflector to move to avoid the light so that the light is incident on the reflector corresponding to the target cleaning station. At this time, the galvanometer is located at the target cleaning station.

[0045] Specifically, in this embodiment, except for the last reflector, each reflector can be moved to avoid the light. For example, if the battery on the second cleaning station 52 needs to be cleaned, the first driver drives the galvanometer 40 to move to the second cleaning station 52. The second driver drives the first reflector 31 to move up and down or forward and backward, so that the light emitted by the laser 10 can be directly incident on the second reflector 32, and the second reflector 32 reflects the light to the galvanometer 40 to clean the battery on the second cleaning station 52.

[0046] Furthermore, in this embodiment, when the second driver drives the reflector to move, it preferably drives the reflector to move in the front-rear direction to ensure that the reflector is accurately positioned after being reset without deviation, thereby ensuring the cleaning effect.

[0047] like Figure 4 As shown, in another embodiment of the utility model, the number of the galvanometer mirrors 40 can also be multiple, each galvanometer mirror 40 is arranged above a cleaning station, each reflector is arranged opposite to a galvanometer mirror 40, and each reflector is a full reflector. The multi-station cleaning device also includes multiple third drivers, and each third driver is connected to a reflector except the last reflector, and the third driver is used to drive the first reflector to move to avoid the light.

[0048] Specifically, in this embodiment, a galvanometer is provided on each cleaning station. Assuming that the number of cleaning stations is two, a first galvanometer 41 and a second galvanometer 42 are provided accordingly. Each galvanometer is provided with a corresponding reflector, that is, the first galvanometer 41 is opposite to the first reflector 31, and the second galvanometer 42 is opposite to the second reflector 32. In this embodiment, since the first reflector 31 and the second reflector 32 are both full reflectors, when the battery is located at the second cleaning station 52, the first reflector 31 will block the light, so that the third driver is provided to drive the first reflector 31 to move, so that the light emitted by the laser 10 can be directly incident on the second reflector 32, and then reflected by the second reflector 32 to the second galvanometer 42, so as to clean the battery on the second cleaning station 52.

[0049] In summary, the multi-station cleaning device provided by the embodiment of the utility model can clean batteries on multiple cleaning stations at the same time, and can also clean batteries located at a certain cleaning station according to actual working conditions. The cleaning method is flexible, which improves the cleaning efficiency and reduces the production cost.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A multi-station cleaning device, characterized in that: include: The first cleaning mechanism is used to clean the electrolyte around the battery injection hole and cool the area around the battery injection hole during cleaning; The second cleaning mechanism comprises: a laser, a beam expander, a reflector group and at least one galvanometer, wherein the laser, the beam expander and the reflector group are arranged in sequence along the propagation direction of the light; The reflector group is used to reflect the incident light to the galvanometer. The reflector group includes multiple reflectors, each of which corresponds to a cleaning station. Along the propagation direction of the light, the last reflector is a total reflector. The laser passes through the galvanometer to perform secondary cleaning on the electrolyte remaining around the injection hole.

2. The multi-station cleaning device according to claim 1, characterized in that: The number of the galvanometer mirror is one, and the remaining reflectors in the reflector group are all semi-transmissive mirrors; Each of the reflectors is used to reflect part of the incident light to the galvanometer, and part of the incident light passes through the reflector and is incident on the next reflector.

3. The multi-station cleaning device according to claim 2, characterized in that: Each reflector in the reflector group is arranged at a different angle.

4. The multi-station cleaning device according to claim 3, characterized in that: It also includes a plurality of rotating parts, each of the reflectors is arranged on one of the rotating parts, and when the rotating parts rotate, the reflectors can be driven to rotate so as to adjust the setting angle of the reflectors.

5. The multi-station cleaning device according to claim 1, characterized in that: The power of the laser is proportional to the number of mirrors in the mirror set.

6. The multi-station cleaning device according to claim 1, characterized in that: The number of the galvanometer mirror is one, and the multiple reflectors in the reflector group are arranged in parallel; The multi-station cleaning device further includes a first driver, which is connected to the galvanometer and is used to drive the galvanometer to move between the plurality of cleaning stations.

7. The multi-station cleaning device according to claim 6, characterized in that: It also includes at least one second driver. Along the propagation direction of the light, except for the last reflector, each of the reflectors is connected to a second driver. The second driver is used to drive the reflectors to move so as to avoid the light and allow the light to enter the reflector facing the target cleaning station. The galvanometer is located at the target cleaning station.

8. The multi-station cleaning device according to claim 7, characterized in that: The remaining reflectors in the reflector group are total reflectors.

9. The multi-station cleaning device according to claim 7, characterized in that: The second driver is used to drive the reflecting mirror to move up and down or forward and backward.

10. The multi-station cleaning device according to claim 1, characterized in that: There are multiple galvanometers, and each galvanometer is arranged above a cleaning station; The plurality of reflectors in the reflector group are arranged in parallel, each of the reflectors is arranged opposite to one of the galvanometer mirrors, and each of the reflectors is a total reflector; The multi-station cleaning device also includes a plurality of third drivers. Except for the last reflector, each of the third drivers is connected to a reflector. The third drivers are used to drive the reflector to move so as to avoid light.

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