Cleaning equipment and battery monomer production line

Abstract

The utility model relates to the technical field of battery manufacturing, and solves the problem of low reliability of a single battery. The utility model discloses cleaning equipment and a production line of a battery monomer. The cleaning equipment comprises an ultrasonic vibration device, a vacuum dust collection device and an online monitoring device, the ultrasonic vibration device is used for being connected with a winding assembly of a production line of a battery monomer, and transmitting ultrasonic waves to a naked battery cell through the winding assembly to remove impurities on the naked battery cell while the naked battery cell is wound by the winding assembly; the vacuum dust collection device is used for collecting impurities. And the on-line monitoring device is used for detecting the impurity residue condition of the naked battery cell. According to the cleaning equipment, the ultrasonic vibration device can transmit ultrasonic waves to the naked battery cell through the winding assembly while the winding assembly winds the naked battery cell, impurities on the naked battery cell are vibrated off, so that the impurities on the naked battery cell are eliminated, the vacuum dust collection device can collect the impurities, secondary pollution of the impurities is avoided to a certain extent, and the cleaning efficiency is improved. And the reliability of the battery monomer can be improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a cleaning device and a production line for battery cells. Background Art

[0002] In related technologies, carbon powder particles are generated during the production process of battery cells. The carbon powder particles will adhere to the surface of the electrode, especially the carbon powder particles remaining in the large area of ​​the blue glue (insulating glue) of the bare battery cell. These particles can easily pierce the diaphragm in the subsequent winding process, reducing the reliability of the battery cell. Utility Model Content

[0003] In view of the above problems, the present application provides a cleaning device and a production line for battery cells, which can improve the reliability of battery cells to a certain extent.

[0004] In a first aspect, the present application provides a cleaning device for a battery cell production line, the cleaning device comprising an ultrasonic vibration device, a vacuum cleaning device, and an online monitoring device;

[0005] The ultrasonic vibration device is used to be connected to the winding assembly of the production line of the battery cell, and while the winding assembly is winding the bare cell, ultrasonic waves are transmitted to the bare cell through the winding assembly to remove impurities on the bare cell;

[0006] The vacuum cleaning device is used to collect the impurities.

[0007] The online monitoring device is used to collect images of the bare battery cell after cleaning, and detect the residual impurities in the bare battery cell based on the images of the bare battery cell after cleaning; when the residual impurities in the bare battery cell exceed the standard, the cleaning equipment is used to perform secondary cleaning on the bare battery cell.

[0008] In the above-mentioned cleaning equipment, the ultrasonic vibration device can transmit ultrasonic waves to the bare battery cell through the winding assembly while the winding assembly is winding the bare battery cell, thereby shaking off the impurities on the bare battery cell, thereby eliminating the impurities on the bare battery cell. The vacuum cleaning device can collect impurities, and the online monitoring device can detect the residual impurities in the bare battery cell after cleaning, thereby ensuring the cleaning effect of the bare battery cell to a certain extent, thereby avoiding secondary contamination of impurities to a certain extent, and improving the reliability of the battery cell to a certain extent.

[0009] In some embodiments, the ultrasonic vibration device includes an ultrasonic generator, and the frequency of the ultrasonic wave output by the ultrasonic generator is 24 kHz.

[0010] In the above embodiment, the frequency of the ultrasonic wave is 24 kHz, which can effectively shake off impurities to a certain extent without causing any damage to the structure of the bare battery cell.

[0011] In some embodiments, the shell of the ultrasonic vibration device is made of alloy material, and / or the surface roughness of the ultrasonic vibration device is less than or equal to the size of the impurities.

[0012] The above embodiment can increase the service life of the ultrasonic vibration device to a certain extent and prevent impurities from adhering to the ultrasonic vibration device.

[0013] In some embodiments, the surface roughness of the ultrasonic vibration device is Ra, Ra≤0.4 μm.

[0014] The above embodiment can, to a certain extent, prevent impurities with a size greater than or equal to 0.4 μm from adhering to the surface of the ultrasonic vibration device.

[0015] In some embodiments, the vacuum cleaning device includes a dust suction piece, the dust suction piece is provided with a dust suction port, and the dust suction port is located directly below the bare battery cell.

[0016] The above embodiments can improve the dust collection efficiency to a certain extent.

[0017] In some embodiments, the distance between the dust suction port and the bare battery cell is L, L satisfies 1.5mm≤L≤3mm, and / or the dust suction port is slit-shaped, the width of the dust suction port is W, W satisfies 0.5mm≤W≤1.5mm.

[0018] The above embodiment can ensure the dust collection effect to a certain extent.

[0019] In some embodiments, the dust suction piece includes a base and a reinforcement layer, the base is provided with a dust suction cavity and the dust suction port, the dust suction cavity is connected to the dust suction port, and the reinforcement layer is provided on the surface of the base away from the dust suction cavity.

[0020] The above embodiment can ensure the pressure resistance of the dust collecting component to a certain extent and extend the service life of the dust collecting component.

[0021] In some embodiments, an anti-sticking and wear-resistant layer is provided on the surface of the base body facing the dust suction chamber.

[0022] The above embodiments can improve the cleaning effect and extend the service life of the dust collector to a certain extent.

[0023] In some embodiments, the dust collecting member includes an antistatic layer, and the antistatic layer is provided on a surface of the reinforcing layer away from the substrate.

[0024] The above embodiments can improve the cleaning effect to a certain extent.

[0025] In some embodiments, during the secondary cleaning of the bare cell, the online monitoring device is configured to adjust at least one of the following cleaning parameters according to the residual impurities in the bare cell:

[0026] The ultrasonic frequency of the ultrasonic vibration device;

[0027] cleaning time;

[0028] The distance between the suction port of the vacuum cleaner and the bare battery cell;

[0029] The dust suction air volume of the vacuum cleaning device;

[0030] The rotational speed of the winding assembly.

[0031] The above embodiment can adjust the cleaning parameters during the secondary cleaning of the bare battery cell to make the cleaning more efficient.

[0032] In some embodiments, the cleaning device includes a plurality of ultrasonic vibration devices, each of which is used to be arranged on a roller corresponding to the winding assembly, so that when the winding assembly winds the bare battery cell in the working area of ​​the vacuum cleaning device, the ultrasonic vibration device is used to transmit ultrasonic waves to the bare battery cell located in the working area of ​​the vacuum cleaning device through the roller.

[0033] The above embodiment enables the cleaning device to use ultrasound to shake off impurities on the bare battery cells while the winding assembly is winding the bare battery cells, ensuring to a certain extent that each bare battery cell is cleaned within the residence time at the winding station.

[0034] In a second aspect, the present application provides a battery cell production line, which includes a winding assembly and a cleaning device according to any of the above embodiments, wherein the ultrasonic vibration device is connected to the winding assembly, and the winding assembly is used to wind bare battery cells.

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1A schematic diagram of a partial structure of a battery cell production line according to some embodiments of the present application;

[0038] Figure 2 This is a diagram showing the positional relationship between the dust collecting element and the bare battery cell in some embodiments of the present application;

[0039] Figure 3 A top view of a dust collecting member according to some embodiments of the present application;

[0040] Figure 4 This is a partial cross-sectional schematic diagram of a dust collecting piece according to some embodiments of the present application.

[0041] The reference numerals in the specific embodiment are as follows:

[0042] Cleaning device 100, bare battery cell 300.

[0043] Ultrasonic vibration device 20, shell 21, vacuum cleaning device 30, dust collection part 31, base 311, reinforcement layer 312, dust collection chamber 313, anti-static layer 314, dust collection port 32, vacuum cleaning tube 33, winding assembly 40, first turntable 41, second turntable 42, roller pair 43, first roller 431, second roller 432, winding needle 44, online monitoring device 50. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0047] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0052] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0053] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0054] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0055] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0056] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0057] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0058] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0059] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0060] In related technologies, carbon powder particles are generated during the production process of battery cells. The carbon powder particles will adhere to the surface of the electrode, especially the carbon powder particles remaining in the large area of ​​the blue glue (insulating glue) of the bare battery cell. These particles can easily pierce the diaphragm in the subsequent winding process, reducing the reliability of the battery cell.

[0061] In order to improve the reliability of battery cells to a certain extent, the present application provides a cleaning device, which is used in a production line of battery cells. The cleaning device includes an ultrasonic vibration device, a vacuum cleaning device and an online monitoring device;

[0062] The ultrasonic vibration device is used to connect to the winding assembly of the battery cell production line, and transmit ultrasonic waves to the bare cells through the winding assembly to remove impurities on the bare cells while the winding assembly is winding the bare cells.

[0063] The vacuum cleaner is used to collect impurities. The online monitoring device is used to capture images of the cleaned bare cells and detect the residual impurities in the cells based on the images. If the residual impurities in the bare cells exceed the standard, the cleaning equipment is used to perform a secondary cleaning on the bare cells.

[0064] In the technical solution of the embodiment of the present application, the ultrasonic vibration device can transmit ultrasonic waves to the bare battery cell through the winding assembly while the winding assembly is winding the bare battery cell, thereby vibrating off impurities on the bare battery cell, thereby eliminating impurities on the bare battery cell. The vacuum cleaning device can collect impurities, and the online monitoring device can detect the residual impurities in the bare battery cell after cleaning, thereby ensuring the cleaning effect of the bare battery cell to a certain extent, thereby avoiding secondary contamination of impurities to a certain extent, and improving the reliability of the battery cell to a certain extent.

[0065] In the first aspect, according to some embodiments of this application, please refer to Figure 1 The present application provides a cleaning device 100, which is used in a production line for battery cells. The cleaning device 100 includes an ultrasonic vibration device 20 and a vacuum cleaner 30. The ultrasonic vibration device 20 is used to connect to a winding assembly 40 of the battery cell production line, and while the winding assembly 40 is winding a bare cell 300, ultrasonic waves are transmitted to the bare cell 300 through the winding assembly 40 to remove impurities on the bare cell 300. The vacuum cleaner 30 is used to collect impurities.

[0066] Specifically, the cleaning device 100 can be used in a production line of battery cells, which can be used to produce battery cells including but not limited to lithium batteries, sodium batteries, and the like.

[0067] Optionally, in one embodiment, please combine Figure 1 The production line of battery monomers includes a winding assembly 40, which may include a first turntable 41, a second turntable 42, a plurality of roller pairs 43 and a winding needle 44. The first turntable 41 and the second turntable 42 are arranged at intervals along the axial direction. Each roller pair 43 includes a first roller 431 and a second roller 432. The first roller 431 is rotatably provided on the surface of the first turntable 41 facing the second turntable 42, and the second roller 432 is rotatably provided on the surface of the second turntable 42 facing the first turntable 41.

[0068] The winding needle 44 is retractably mounted on the first roller 431. During the winding operation, the first turntable 41 and the second turntable 42 can drive one of the roller pairs 43 to the winding station. The winding needle 44 extends from the first roller 431 and rotatably inserts into the second roller 432. One end of the bare cell 300 before winding is fixed to the winding needle 44. The first roller 431 can serve as a driving roller, driving the winding needle 44 to rotate, thereby driving the bare cell 300 to be wound. After the bare cell 300 is wound, insulating glue (such as blue glue) is applied to the circumferential surface (large surface) of the wound bare cell 300, after which the first roller 431 can stop rotating.

[0069] Afterwards, the mechanical claw can grab the bare cell 300 with the insulating adhesive applied, and the winding needle 44 can remove the bare cell 300 with the insulating adhesive applied, and move the bare cell 300 with the insulating adhesive applied to the next station. The first turntable 41 and the second turntable 42 can drive another roller pair 43 to the winding station to wind the next bare cell 300.

[0070] exist Figure 1 In the illustrated embodiment, the ultrasonic vibration device 20 is provided on the second roller 432. The winding assembly 40 is synchronized with the ultrasonic vibration device 20 to ensure that each bare cell 300 is cleaned within the residence time. Specifically, while the winding assembly 40 is winding the bare cell 300, the ultrasonic vibration device 20 can be turned on to generate ultrasonic waves, and when the winding assembly 40 stops winding the bare cell 300, the ultrasonic vibration device 20 can be turned off. The ultrasonic waves can be transmitted to the bare cell 300 being wound via the second roller 432 and the winding needle 44, so that impurities on the bare cell 300 are shaken off, thereby eliminating the impurities on the bare cell 300. Impurities include but are not limited to carbon powder particles.

[0071] Optionally, the vacuum cleaner 30 can be activated simultaneously with the ultrasonic vibration device 20 to create a negative pressure area near the bare cell 300 being wound. The vacuum cleaner 30 can promptly remove impurities that have been shaken off the bare cell 300 and the surrounding area, preventing the impurities from being dispersed again in the production environment and reattaching to the bare cell 300. This avoids the risk of internal short circuits in the bare cell 300 caused by residual impurities, thereby improving the reliability of the bare cell 300 to a certain extent.

[0072] The bare cell 300 mentioned in this application may refer to a structure formed by stacking or winding a positive electrode sheet, a negative electrode sheet, and a separator.

[0073] Furthermore, the vacuum cleaner 30, when turned on, can also remove impurities scattered in the production environment, removing them before they come into contact with the surface of the bare cell 300, thus achieving non-contact separation of the impurities from the surface of the bare cell 300. The cleaning device 100 can quickly clean the bare cell 300 before the turntable rotates to apply the insulating adhesive, without affecting the original production process. The vibration process of removing impurities is fast and efficient, and will not significantly affect the production speed, thereby achieving the goal of increasing efficiency and reducing costs.

[0074] Furthermore, ultrasonic vibration cleaning removes impurities from the surface of the bare cell 300, improving the contact between the electrode and the electrolyte during the subsequent charge and discharge process of the battery cell, reducing the poor ion transmission caused by impurities. This helps improve the charge and discharge efficiency of the battery cell, reduces the internal resistance of the battery cell, and thus increases the energy density and cycle life of the battery cell. In addition, after removing impurities (such as carbon powder), the consistency of the battery cell is improved, and the performance of each battery cell in the battery cell assembly is more closely matched, and the performance of the entire battery cell assembly is also significantly improved.

[0075] According to some embodiments of the present application, optionally, the ultrasonic vibration device 20 includes an ultrasonic generator, and the frequency of the ultrasonic wave output by the ultrasonic generator is 24 kHz.

[0076] In the above embodiment, the frequency of the ultrasonic wave is 24 kHz, which can effectively shake off impurities to a certain extent without causing any damage to the structure of the bare battery cell 300.

[0077] Specifically, the ultrasonic generator can stably output 24kHz ultrasonic waves. The 24kHz ultrasonic waves can be transmitted to the bare cell 300 through the winding assembly 40, thereby shaking off the impurities on the bare cell 300. Ultrasonic waves at this frequency can effectively shake off impurities without causing any damage to the structure of the bare cell 300. The ultrasonic waves generated by the ultrasonic vibration device 20 can be evenly and stably transmitted to every part of the bare cell 300, achieving all-round cleaning coverage of the surface of the bare cell 300.

[0078] In one example, it was experimentally verified that the removal rate of particles with a size of ≥5μm (micrometers) at 24kHz ultrasonic waves was >98%.

[0079] According to some embodiments of the present application, optionally, please combine Figure 1 The shell 21 of the ultrasonic vibration device 20 is made of alloy material, and / or the surface roughness of the ultrasonic vibration device 20 is less than or equal to the size of the impurities.

[0080] The above embodiment can increase the service life of the ultrasonic vibration device 20 to a certain extent and prevent impurities from adhering to the ultrasonic vibration device 20 .

[0081] Optionally, in one embodiment, the ultrasonic vibration device 20 may include a shell 21 and an ultrasonic generator. The ultrasonic generator is disposed in the shell 21 , and the ultrasonic waves generated by the ultrasonic generator may be transmitted to the winding assembly 40 through the shell 21 .

[0082] The shell 21 of the ultrasonic vibration device 20 is made of alloy material, which can, to a certain extent, prevent the shell 21 from being damaged during long-term use of the ultrasonic vibration device 20 , thereby increasing the service life of the ultrasonic vibration device 20 .

[0083] The surface roughness of the ultrasonic vibration device 20 is less than or equal to the size of the impurities (such as the particle size of the particles), so that impurities in the production environment (including impurities vibrated off the surface of the bare battery cell 300) are not easy or will not be embedded in the surface of the shell 21 of the ultrasonic vibration device 20, thereby avoiding impurities from adhering to the ultrasonic vibration device 20, making the production environment cleaner, and helping to improve the cleaning effect of the bare battery cell 300.

[0084] The material of the housing 21 may include but is not limited to stainless steel (such as 304 stainless steel).

[0085] Optionally, in one embodiment, the housing 21 of the ultrasonic vibration device 20 is made of an alloy material, and the surface roughness of the ultrasonic vibration device 20 is less than or equal to the size of the impurities. Optionally, in one embodiment, the housing 21 of the ultrasonic vibration device 20 is made of an alloy material, or the surface roughness of the ultrasonic vibration device 20 is less than or equal to the size of the impurities.

[0086] According to some embodiments of the present application, optionally, the surface roughness of the ultrasonic vibration device 20 is Ra, Ra≤0.4 μm.

[0087] The above embodiment can prevent impurities with a size greater than or equal to 0.4 μm from adhering to the surface of the ultrasonic vibration device 20 to a certain extent.

[0088] In some examples, Ra=0.4 μm, 0.35 μm, 0.3 μm, 0.25 μm, or other values ​​less than or equal to 0.4 μm.

[0089] The lower limit of the surface roughness can be determined based on process requirements, cost and other factors, and is not limited in this application. Optionally, in one embodiment, the surface of the housing 21 of the ultrasonic vibration device 20 can be electropolished to achieve the required surface roughness.

[0090] According to some embodiments of the present application, optionally, please combine Figure 1 and Figure 2 The vacuum cleaning device 30 includes a dust collecting member 31 , which is provided with a dust collecting port 32 , and the dust collecting port 32 is located directly below the bare battery cell 300 .

[0091] The above embodiments can improve the dust collection efficiency to a certain extent.

[0092] Specifically, in one embodiment, please combine Figure 1The winding assembly 40 includes three roller pairs 43. The second roller 432 of each roller pair 43 is equipped with an ultrasonic vibration device 20. The dust collection member 31 can be located at the winding station, and the dust collection port 32 is opened at the top of the dust collection member 31. When the turntable drives one of the roller pairs 43 to the winding station, the dust collection port 32 is located directly below the bare battery cell 300. As a result, impurities shaken off the bare battery cell 300 can be quickly sucked into the dust collection member 31, which improves the dust collection efficiency to a certain extent. The dust collection member 31 may include, but is not limited to, a dust collection box.

[0093] Optionally, the vacuum cleaner 30 further includes a vacuum pump connected to the suction element 31 via a vacuum suction pipe 33. When the vacuum pump is operating, it creates a negative pressure near the suction port 32, thereby drawing impurities into the suction element 31. The power of the vacuum pump can be selected based on the actual equipment to ensure that the vacuum suction force meets the requirements and can completely remove impurities as soon as they leave the surface of the bare battery cell 300, eliminating the possibility of secondary contamination.

[0094] The "directly below" mentioned in this application may refer to the overlapping area between the vertical projection of the bare battery cell 300 and the suction port 32.

[0095] According to some embodiments of the present application, optionally, please combine Figure 2 The distance between the dust suction port 32 and the bare battery cell 300 is L, L satisfies 1.5mm (millimeter) ≤ L ≤ 3mm, and / or, please combine Figure 3 The dust suction port 32 is in a slit shape, and the width of the dust suction port 32 is W, where W satisfies 0.5 mm ≤ W ≤ 1.5 mm.

[0096] The above embodiment can ensure the dust collection effect to a certain extent.

[0097] Specifically, at the same power level of the vacuum cleaner 30, the suction efficiency is related to the distance L between the suction port 32 and the bare battery cell 300. If L satisfies 1.5 mm ≤ L ≤ 3 mm, most impurities (e.g., 99.98% of dust) can be absorbed, achieving cleaning while avoiding secondary contamination, thereby ensuring suction efficiency to a certain extent. In some examples, L = 1.5 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, or other values ​​between 1.5 mm ≤ L ≤ 3 mm.

[0098] The suction port 32 is slit-shaped, with a width W of 0.5 mm ≤ W ≤ 1.5 mm. This creates a strong suction force near the suction port 32, thereby quickly drawing impurities into the suction element 31 and ensuring a certain degree of suction efficiency. In some examples, W = 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, or other values ​​between 0.5 mm ≤ W ≤ 1.5 mm.

[0099] Optionally, the length of the dust suction port 32 can cover the length of the bare battery cell 300 .

[0100] According to some embodiments of the present application, optionally, please combine Figure 4 The dust collecting member 31 includes a base 311 and a reinforcement layer 312 . The base 311 is provided with a dust collecting cavity 313 and a dust collecting port 32 . The dust collecting cavity 313 is communicated with the dust collecting port 32 . The reinforcement layer 312 is provided on the surface of the base 311 away from the dust collecting cavity 313 .

[0101] The above embodiment can ensure the pressure resistance of the dust collecting member 31 to a certain extent, and extend the service life of the dust collecting member 31.

[0102] Specifically, when the vacuum pump is operating, a negative pressure is generated within the dust collection chamber 313, drawing impurities into the chamber 313 through the dust collection port 32. When a negative pressure is generated within the dust collection element 31, the pressure difference between the inside and outside of the dust collection element 31 may damage the dust collection element 31. The reinforcement layer 312 is provided on the surface of the base 311 away from the dust collection chamber 313, which can improve the pressure resistance of the dust collection element 31 to a certain extent, thereby extending the service life of the dust collection element 31.

[0103] Optionally, the reinforcement layer 312 may be a metal reinforcement layer 312, and the metal material includes but is not limited to stainless steel. The material of the substrate 311 includes but is not limited to PTFE (polytetrafluoroethylene), and the thickness of the substrate 311 includes but is not limited to 0.5 mm. Optionally, the substrate 311 may be a conductive polymer substrate 311, with a volume resistivity of 10 2 to 10 4 Ω·cm.

[0104] According to some embodiments of the present application, optionally, an anti-sticking and wear-resistant layer is provided on the surface of the base 311 facing the dust suction chamber 313 .

[0105] The above embodiment can improve the cleaning effect and extend the service life of the dust collecting element 31 to a certain extent.

[0106] Specifically, in one embodiment, when the vacuum pump is working, negative pressure is formed in the dust suction chamber 313, and impurities are sucked in through the dust suction port 32. The impurities can be transported to the collection bag through the vacuum suction pipe 33 for collection.

[0107] The anti-stick and wear-resistant layer has anti-stick and wear-resistant properties. The anti-stick property prevents impurities sucked into the dust collection chamber 313 from being adsorbed on the inner wall of the dust collection chamber 313. This prevents impurities in the dust collection chamber 313 from being dispersed through the dust collection port 32 into the battery cell production environment when the vacuum cleaner 30 is not operating. This can improve the cleaning effect of the bare battery cell 300 to a certain extent.

[0108] The wear-resistant performance can, to a certain extent, prevent the impurities sucked into the dust collection chamber 313 from hitting the inner wall of the dust collection chamber 313 and damaging the dust collection member 31 , thereby extending the service life of the dust collection member 31 .

[0109] Optionally, in one embodiment, aluminum oxide (Al 2 O 3 ) may be sprayed on the surface of the substrate 311 facing the dust suction chamber 313 by plasma spraying to form an anti-sticking and wear-resistant layer.

[0110] According to some embodiments of the present application, optionally, please combine Figure 4 The dust collecting member 31 includes an antistatic layer 314 , which is disposed on a surface of the reinforcing layer 312 away from the base 311 .

[0111] The above embodiments can improve the cleaning effect to a certain extent.

[0112] Specifically, in the battery cell production environment, impurities (such as dust) may be attracted to the surface of components due to static electricity. Once the static electricity on the component surface is eliminated, the impurities originally adsorbed on the component surface will be dispersed into the battery cell production environment.

[0113] The antistatic layer 314 is arranged on the surface of the reinforcing layer 312 away from the base 311, so that the outer surface of the dust collecting part 31 is free of static electricity, and the surface of the dust collecting part 31 will not absorb impurities due to static electricity, which to a certain extent ensures the cleanliness of the production environment of the battery cell and improves the cleaning effect of the bare battery cell 300.

[0114] Please combine Figure 1 The cleaning device 100 includes an online monitoring device 50, which is used to collect images of the cleaned bare battery cell 300 and detect the residual impurities of the bare battery cell 300 based on the images of the cleaned bare battery cell 300;

[0115] When the residual impurities in the bare battery cell 300 exceed the standard, the cleaning device 100 is used to perform secondary cleaning on the bare battery cell 300 .

[0116] In the above embodiment, the online monitoring device 50 can detect the residual impurities in the cleaned bare battery cells 300 , thereby ensuring the cleaning effect of the bare battery cells 300 to a certain extent.

[0117] Optionally, in one embodiment, the online monitoring device 50 includes an image acquisition module and an image recognition module, wherein the image recognition module is connected to the image acquisition module. The image acquisition module is configured to capture images of the cleaned bare battery cells 300. The images of the bare battery cells 300 are transmitted to the image recognition module. The image recognition module can identify impurities in the images, including their size and quantity.

[0118] Alternatively, in one embodiment, the image acquisition module may include an optical microscope and a camera, and the camera may acquire the magnified image of the bare battery cell 300 through the optical microscope. Alternatively, in one embodiment, the image acquisition module may include an electron microscope.

[0119] The image recognition module can analyze the residual impurities on the surface of the bare cell 300. For example, the image recognition module can obtain the size of the impurities and the quantity distribution at each size. The image recognition module is preset with a residual exceeding standard condition. For example, the residual exceeding standard condition is that the number of impurities with a size larger than a set size is greater than a set number. When the number of impurities with a size larger than a set size is greater than a set number, the image recognition module determines that the impurity residues of the cleaned bare cell 300 exceed the standard. For another example, the residual exceeding standard condition is that impurities still exist on the surface of the bare cell 300. When impurities still exist on the surface of the cleaned bare cell 300, the image recognition module determines that the impurity residues of the cleaned bare cell 300 exceed the standard. Before applying insulating glue to the bare cell 300, the cleaning device 100 can perform a secondary cleaning on the bare cell 300.

[0120] Optionally, in one embodiment, after the bare cell 300 is wound, the turntable stops rotating, and the ultrasonic vibration device 20 and vacuum cleaner 30 are turned off. The online monitoring device 50 captures images of the cleaned bare cell 300. If it is determined that the residual impurities in the bare cell 300 exceed the standard, the ultrasonic vibration device 20 and vacuum cleaner 30 can be turned back on to perform a secondary cleaning of the bare cell 300.

[0121] Optionally, in one embodiment, the cleaning apparatus 100 includes a dust removal device. After the bare cell 300 is wound, the turntable stops rotating, and the ultrasonic vibration device 20 and vacuum cleaner 30 are turned off. The online monitoring device 50 captures images of the cleaned bare cell 300. If it is determined that the residual impurities in the bare cell 300 exceed the standard, the bare cell 300 is transported to the dust removal device inlet for secondary cleaning.

[0122] When the residual impurities in the bare cell 300 do not exceed the standard, the production line of the battery cell can apply insulating glue to the circumferential surface of the bare cell 300, thereby forming a closed-loop process of cleaning-testing-glueing.

[0123] In one embodiment, if the online monitoring device 50 detects that the bare cell 300 is not cleaned thoroughly, it can promptly adjust the cleaning parameters. After cleaning, the bare cell 300 can be immediately bonded with insulating adhesive. Due to the high surface cleanliness of the bare cell 300, the insulating adhesive adheres better, ensuring the quality of the insulating adhesive bonding and avoiding problems such as loose insulating adhesive bonding due to surface uncleanliness. This ensures the efficiency and stability of the entire production process and improves the product yield rate.

[0124] According to some embodiments of the present application, optionally, during secondary cleaning of the bare cell 300 , the online monitoring device 50 is configured to adjust at least one of the following cleaning parameters based on the residual impurities in the bare cell 300 :

[0125] The ultrasonic frequency of the ultrasonic vibration device 20;

[0126] cleaning time;

[0127] The distance between the suction port 32 of the vacuum cleaner 30 and the bare battery cell 300;

[0128] The dust suction air volume of the vacuum cleaner 30;

[0129] The rotational speed of the winding assembly 40.

[0130] The above embodiment can adjust the cleaning parameters during the secondary cleaning of the bare cell 300 to make the cleaning more efficient.

[0131] Specifically, in one embodiment, during secondary cleaning of the bare cell 300, the ultrasonic frequency of the ultrasonic vibration device 20 can be increased, thereby enhancing the cleaning device 100's ability to shake off residual impurities on the surface of the bare cell 300. The mapping relationship between the increased amplitude and the residual impurities in the bare cell 300 can be pre-calibrated and stored through simulation, testing, etc., and is not limited in this application.

[0132] In one embodiment, during the secondary cleaning of the bare cell 300, the cleaning duration can be increased, thereby subjecting the bare cell 300 to ultrasonic vibration for a longer period of time, more effectively shaking off impurities remaining on the surface of the bare cell 300. The mapping relationship between the increased amplitude and the amount of impurities remaining in the bare cell 300 can be pre-calibrated and stored through simulation, testing, etc., and is not limited in this application.

[0133] In one embodiment, when performing secondary cleaning on the bare cell 300, the distance L between the suction port 32 of the vacuum cleaner 30 and the bare cell 300 can be adjusted (e.g., increased or decreased) to increase the suction effect and more effectively remove impurities remaining on the surface of the bare cell 300. The mapping relationship between the increase amplitude and the residual impurities in the bare cell 300 can be calibrated and stored in advance through simulation, testing, etc., and is not limited in this application. Optionally, in one embodiment, within a set adjustment range, the relationship between the distance L between the suction port 32 of the vacuum cleaner 30 and the bare cell 300 and the suction effect can be calibrated and stored in advance.

[0134] In one embodiment, during secondary cleaning of the bare cell 300, the suction volume of the vacuum cleaner 30 can be increased to create a negative pressure region with greater suction near the suction port 32, thereby more effectively removing impurities remaining on the surface of the bare cell 300. The mapping between the magnitude of the increase and the amount of impurities remaining in the bare cell 300 can be pre-calibrated and stored through simulation, testing, or other methods, and is not limited in this application.

[0135] In one embodiment, during secondary cleaning of the bare cell 300, the rotational speed of the winding assembly 40 can be increased, for example, by increasing the rotational speed of the first roller 431. This increases the rotational speed of the bare cell 300, creates a greater centrifugal force, and facilitates the removal of impurities remaining on the surface of the bare cell 300. The mapping between the magnitude of the increase and the level of impurities remaining in the bare cell 300 can be pre-calibrated and stored through simulation, testing, or other methods, and is not limited in this application.

[0136] Optionally, in one embodiment, the online monitoring device 50 is used to adjust all the following cleaning parameters according to the residual impurities in the bare battery cell 300: the ultrasonic frequency of the ultrasonic vibration device 20, the cleaning time, the distance between the suction port 32 of the vacuum cleaner 30 and the bare battery cell 300, the suction air volume of the vacuum cleaner 30, and the rotation speed of the winding assembly 40.

[0137] Optionally, in one embodiment, the online monitoring device 50 is used to adjust any one, any two, or any three, or any four of the following cleaning parameters according to the residual impurities in the bare battery cell 300: the ultrasonic frequency of the ultrasonic vibration device 20, the cleaning time, the distance between the suction port 32 of the vacuum cleaner 30 and the bare battery cell 300, the suction air volume of the vacuum cleaner 30, and the rotation speed of the winding assembly 40.

[0138] According to some embodiments of the present application, optionally, please combine Figure 1 The cleaning device 100 includes a plurality of ultrasonic vibration devices 20, each ultrasonic vibration device 20 is used to be arranged on a roller corresponding to the winding assembly 40, so that when the winding assembly 40 winds the bare battery cell 300 in the working area of ​​the vacuum cleaning device 30, the ultrasonic vibration device 20 is used to transmit ultrasonic waves to the bare battery cell 300 located in the working area of ​​the vacuum cleaning device 30 through the roller.

[0139] The above embodiment enables the cleaning device 100 to use ultrasound to shake off impurities on the bare battery cell 300 while the winding assembly 40 is winding the bare battery cell 300, thereby ensuring to a certain extent that each bare battery cell 300 is cleaned within the residence time at the winding station.

[0140] Specifically, in Figure 1In the illustrated embodiment, the cleaning apparatus 100 includes three ultrasonic vibration devices 20, and the winding assembly 40 includes three roller pairs 43. Each ultrasonic vibration device 20 is disposed on the second roller 432 of each roller pair 43. The present application does not limit the number of roller pairs 43 and ultrasonic vibration devices 20.

[0141] The working area of ​​the vacuum cleaner 30 may correspond to the winding station of the winding assembly 40. While the winding assembly 40 is winding the bare battery cells 300 in the working area of ​​the vacuum cleaner 30, the ultrasonic vibration device 20 is turned on and transmits ultrasonic waves to the bare battery cells 300 located in the working area of ​​the vacuum cleaner 30 via the second roller 432, so that the bare battery cells 300 are cleaned while being wound, thereby ensuring to a certain extent that each bare battery cell 300 is cleaned within the residence time of the winding station.

[0142] In a second aspect, according to some embodiments of the present application, a battery cell production line is provided. The battery cell production line includes a winding assembly 40 and a cleaning device 100 according to any of the above embodiments. The ultrasonic vibration device 20 is connected to the winding assembly 40, and the winding assembly 40 is used to wind bare battery cells 300.

[0143] Optionally, in one embodiment, please combine Figure 1 The winding assembly 40 may include a first turntable 41, a second turntable 42, a plurality of roller pairs 43 and a winding needle 44. The first turntable 41 and the second turntable 42 are arranged axially at intervals. Each roller pair 43 includes a first roller 431 and a second roller 432. The first roller 431 is rotatably provided on the surface of the first turntable 41 facing the second turntable 42, and the second roller 432 is rotatably provided on the surface of the second turntable 42 facing the first turntable 41.

[0144] The winding needle 44 is retractably mounted on the first roller 431. During the winding operation, the first turntable 41 and the second turntable 42 can drive one of the roller pairs 43 to the winding station. The winding needle 44 extends from the first roller 431 and rotatably inserts into the second roller 432. One end of the bare cell 300 before winding is fixed to the winding needle 44. The first roller 431 can serve as a driving roller, driving the winding needle 44 to rotate, thereby driving the bare cell 300 to be wound. After the bare cell 300 is wound, insulating glue (such as blue glue) is applied to the circumferential surface (large surface) of the wound bare cell 300, after which the first roller 431 can stop rotating.

[0145] Afterwards, the mechanical claw can grab the bare cell 300 with the insulating adhesive applied, and the winding needle 44 can remove the bare cell 300 with the insulating adhesive applied, and move the bare cell 300 with the insulating adhesive applied to the next station. The first turntable 41 and the second turntable 42 can drive another roller pair 43 to the winding station to wind the next bare cell 300.

[0146] exist Figure 1 In the illustrated embodiment, the ultrasonic vibration device 20 is disposed on the second roller 432. The winding assembly 40 is synchronized with the ultrasonic vibration device 20 to ensure that each bare cell 300 is cleaned within its residence time. Specifically, while the winding assembly 40 is winding the bare cell 300, the ultrasonic vibration device 20 can be turned on to generate ultrasonic waves, and when the winding assembly 40 stops winding the bare cell 300, the ultrasonic vibration device 20 can be turned off. The ultrasonic waves can be transmitted to the bare cell 300 being wound via the second roller 432 and the winding needle 44, causing impurities on the bare cell 300 to be shaken off.

[0147] Optionally, the vacuum cleaner 30 can be activated simultaneously with the ultrasonic vibration device 20 to create a negative pressure area near the bare cell 300 being wound. The vacuum cleaner 30 can promptly remove impurities that have been shaken off the bare cell 300 and the surrounding area, preventing the impurities from being dispersed again in the production environment and reattaching to the bare cell 300. This avoids the risk of internal short circuits in the bare cell 300 caused by residual impurities, thereby improving the reliability of the bare cell 300 to a certain extent.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application 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 or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A cleaning device for a battery cell production line, characterized in that: The cleaning equipment includes an ultrasonic vibration device, a vacuum cleaning device and an online monitoring device; The ultrasonic vibration device is used to be connected to the winding assembly of the production line of the battery cell, and while the winding assembly is winding the bare battery cell, ultrasonic waves are transmitted to the bare battery cell through the winding assembly to remove impurities on the bare battery cell; The vacuum cleaning device is used to collect the impurities; The online monitoring device is used to collect images of the bare battery cell after cleaning, and detect the residual impurities in the bare battery cell based on the images of the bare battery cell after cleaning; when the residual impurities in the bare battery cell exceed the standard, the cleaning equipment is used to perform secondary cleaning on the bare battery cell.

2. The cleaning device according to claim 1, characterized in that The ultrasonic vibration device includes an ultrasonic generator, and the frequency of the ultrasonic wave output by the ultrasonic generator is 24 kHz.

3. The cleaning device according to claim 1 or 2, characterized in that The shell of the ultrasonic vibration device is made of alloy material, and / or the surface roughness of the ultrasonic vibration device is less than or equal to the size of the impurities.

4. The cleaning device according to claim 3, characterized in that The surface roughness of the ultrasonic vibration device is Ra, Ra≤0.4μm.

5. The cleaning device according to claim 1, characterized in that The vacuum cleaning device includes a dust collecting member, which is provided with a dust collecting port, and the dust collecting port is located directly below the bare battery cell.

6. The cleaning device according to claim 5, characterized in that The distance between the dust suction port and the bare battery cell is L, and L satisfies 1.5mm≤L≤3mm, and / or the dust suction port is slit-shaped, and the width of the dust suction port is W, and W satisfies 0.5mm≤W≤1.5mm.

7. The cleaning device according to claim 5, characterized in that The dust collecting piece includes a base and a reinforcement layer. The base is provided with a dust collecting cavity and the dust collecting port. The dust collecting cavity is communicated with the dust collecting port. The reinforcement layer is arranged on a surface of the base away from the dust collecting cavity.

8. The cleaning device according to claim 7, characterized in that An anti-sticking and wear-resistant layer is provided on the surface of the base body facing the dust suction cavity.

9. The cleaning device according to claim 7, characterized in that The dust collecting member comprises an antistatic layer, and the antistatic layer is arranged on the surface of the reinforcing layer away from the base body.

10. The cleaning device according to claim 1, characterized in that During the secondary cleaning of the bare cell, the online monitoring device is used to adjust at least one of the following cleaning parameters according to the residual impurities in the bare cell: The ultrasonic frequency of the ultrasonic vibration device; cleaning time; The distance between the suction port of the vacuum cleaner and the bare battery cell; The dust suction air volume of the vacuum cleaning device; The rotational speed of the winding assembly.

11. The cleaning device according to claim 1, characterized in that The cleaning equipment includes a plurality of ultrasonic vibration devices, each of which is used to be arranged on a roller corresponding to the winding assembly, so that when the winding assembly winds the bare battery cell in the working area of ​​the vacuum cleaning device, the ultrasonic vibration device is used to transmit ultrasonic waves to the bare battery cell located in the working area of ​​the vacuum cleaning device through the roller.

12. A battery cell production line, characterized in that: It comprises a winding assembly and the cleaning device according to any one of claims 1 to 11, wherein the ultrasonic vibration device is connected to the winding assembly, and the winding assembly is used for winding a bare battery core.

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