Spraying equipment, spraying method and battery monomer

Abstract

The invention provides spraying equipment, a spraying method and a single battery, the spraying equipment is used for spraying paint on a to-be-sprayed part, the to-be-sprayed part is provided with a spraying area and a non-spraying area, the spraying equipment comprises a spraying mechanism, a shielding part and a conveying mechanism, the shielding part is arranged on the spraying mechanism, and the conveying mechanism is arranged on the shielding part. The spraying mechanism can move relative to the to-be-sprayed part so as to spray the to-be-sprayed part, and the conveying mechanism conveys the shielding part to the to-be-sprayed part so that the non-spraying area can be shielded through the shielding part. According to the spraying equipment, the non-spraying area is shielded in the spraying period, and accurate spraying of the area can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of spraying technology, and in particular to a spraying device, a spraying method and a battery cell produced based on the spraying method. Background Art

[0002] Power batteries, such as automotive power battery packs, can be composed of a certain number of battery cells stacked on each other in series and parallel. The shell of each battery cell is usually made of metal material, wherein an insulating member may be provided outside the shell of each battery cell to insulate adjacent battery cells and between the battery cell and peripheral devices. The insulating member may be an insulating coating, which may be applied to the outer surface of the shell of the battery cell by spraying, dispensing or printing.

[0003] Here, out of consideration for the performance of the battery cell, a non-spraying area is usually left on the outer surface of its shell, for example, a non-spraying area reserved on the outer surface for fixing to the box body in order to improve the shear resistance, a non-spraying area where the conductive electrode column is located, or a non-spraying area reserved on the outer surface of the shell for the corresponding detection function. When spraying the outer surface of the shell of the battery cell, it is necessary to ensure that the non-spraying area is not contaminated by the paint to achieve the purpose of precise spraying.

[0004] It should be noted that the content introduced here only provides background information related to the present disclosure and does not necessarily belong to the prior art. Summary of the invention

[0005] According to various aspects, the object of the present invention is to provide an improved spraying device, a spraying method which can be carried out by means of the spraying device, and a battery cell produced on the basis of the spraying method, wherein area-accurate spraying can be achieved by means of the spraying device.

[0006] In addition, the present invention is also intended to solve or alleviate other technical problems existing in the prior art.

[0007] According to a first aspect of the present application, a spraying device is proposed, which is used to spray paint on a part to be sprayed, wherein the part to be sprayed has a spraying area and a non-spraying area, wherein the spraying device includes a spraying mechanism, a shielding member and a conveying mechanism, wherein the spraying mechanism can move relative to the part to be sprayed to spray the part to be sprayed, and the conveying mechanism conveys the shielding member to the part to be sprayed so as to shield the non-spraying area through the shielding member.

[0008] In the spraying equipment proposed according to the first aspect of the present application, optionally, the shielding member is maintained above the workpiece to be sprayed at a preset distance by the conveying mechanism, wherein a projection of the shielding member on the workpiece to be sprayed corresponds to the non-spraying area.

[0009] In the spraying equipment proposed according to the first aspect of the present application, optionally, the shielding member is a shielding belt, and the conveying mechanism includes a belt supply device and a belt taking-up device opposite to the workpiece to be sprayed, and the shielding belt is tensioned between the belt supply device and the belt taking-up device, wherein the belt taking-up device is equipped with an actuating device, and the traction force provided by the actuating device drives the shielding belt to perform linear motion above the workpiece to be sprayed.

[0010] In the spraying equipment proposed according to the first aspect of the present application, optionally, the actuator device assigned to the belt taking-up device includes a first clamp and a linear drive that are motion-coupled, and the first clamp clamps the masking belt and performs linear motion together with the masking belt through the linear drive.

[0011] In the spraying equipment proposed according to the first aspect of the present application, optionally, a cutting device is also provided at the belt taking-up device, which has a second clamp and a cutting tool, the second clamp clamps the masking tape, and the cutting tool is located between the first clamp and the second clamp and is used to cut off the used part of the masking tape.

[0012] In the spraying equipment proposed according to the first aspect of the present application, optionally, there is also a wiping device at the belt taking-up device, which contacts the masking belt to wipe off the paint sprayed on its surface.

[0013] In the spraying equipment proposed according to the first aspect of the present application, optionally, the tape supply device and / or the tape take-up device includes a roller for the masking tape to be wound thereon.

[0014] In the spraying equipment proposed according to the first aspect of the present application, optionally, the shielding member is a shielding sheet, and the conveying mechanism includes an actuator device, on the output end of which the shielding sheet is fixed, wherein the shielding sheet is moved to the part to be sprayed or moved back therefrom through the telescopic movement of the actuator device.

[0015] In the spraying equipment proposed according to the first aspect of the present application, optionally, the shielding member is a shielding sheet, the conveying mechanism includes an actuator, the actuator includes a motor and a supporting platform movably coupled to the output shaft of the motor, and a plurality of shielding sheets are evenly distributed along the circumferential direction on the supporting platform, wherein, through the rotational movement of the supporting platform with the aid of the motor, one of the shielding sheets is moved to the part to be sprayed to shield the non-spraying area.

[0016] In the spraying equipment proposed according to the first aspect of the present application, optionally, the shielding member includes a main body and a support portion extending from the main body, wherein the support portion is clamped on the workpiece to be sprayed to maintain the main body above the non-spraying area at a preset distance and shield the non-spraying area during spraying.

[0017] In the spraying equipment proposed according to the first aspect of the present application, optionally, a limit block is provided on the main body, and the limit block is supported on the non-spraying area to maintain the preset distance between the main body and the non-spraying area.

[0018] In the spraying equipment proposed according to the first aspect of the present application, optionally, the preset spacing is 2 mm to 10 mm.

[0019] According to the second aspect of the present application, a spraying method is also proposed, which can be performed by the above-mentioned spraying device, comprising the following steps:

[0020] Positioning the part to be sprayed relative to the spraying equipment;

[0021] The shielding member is conveyed to the workpiece to be sprayed by a conveying mechanism of the spraying equipment to shield a non-spraying area of ​​the workpiece to be sprayed;

[0022] The spraying mechanism is controlled to move relative to the spraying part to spray the paint on the part to be sprayed.

[0023] According to a third aspect of the present application, a battery cell is further provided, which comprises a shell, and the outer surface of the shell is sprayed by the above-mentioned spraying method.

[0024] Here, according to the spraying equipment of the present application, by shielding the non-spraying area during spraying, regionally accurate spraying can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which:

[0026] Figure 1 Schematically shows a first embodiment of a spraying device according to the present application;

[0027] Figure 2 A second embodiment of the spraying device according to the present application is schematically shown;

[0028] Figure 3 Show according to Figure 3 A partial enlarged view of the spraying equipment;

[0029] Figure 4 A third embodiment of the spraying device according to the present application is schematically shown;

[0030] Figure 5 A fourth embodiment of the spraying device according to the present application is schematically shown;

[0031] Figure 6 A fifth embodiment of the spraying device according to the present application is schematically shown;

[0032] Figure 7 Schematically shows a shielding member of a sixth embodiment of the spraying device according to the present application;

[0033] Figure 8 A flow chart showing an embodiment of the spraying method according to the present application. DETAILED DESCRIPTION

[0034] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0035] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for description and distinction purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components.

[0036] Typically, an insulating coating, such as acrylic resin, epoxy resin or polyurethane resin, is provided on the outer surface of the battery cell. The insulating coating has better insulation performance and better shear resistance under vibration and impact conditions than the pasted insulating film. The insulating coating can be formed by applying the insulating material to the outer surface of the housing of the battery cell by spraying, dispensing, inkjet printing or 3D printing, among which the spraying process is more commonly used due to its fast cycle, high efficiency and easy industrialization.

[0037] However, a non-spraying area needs to be reserved on the area of ​​the battery cell coated with an insulating coating. For example, a non-spraying area is reserved on the connection surface of the battery cell shell for fixing to the box body (where the metal material of the shell is exposed), wherein the outer surface of the shell can directly contact the structural adhesive to improve the fixing strength of the battery cell in the box body. Alternatively, a non-spraying area is reserved on the side of the battery cell (where the metal material of the shell is exposed), wherein the outer surface of the shell can directly contact the probe of the detection mechanism to achieve detection and monitoring of the battery cell. Alternatively, on the cover plate of the battery cell, the area where the conductive electrode column and the functional valve are provided is a non-spraying area. In the spraying process, the spraying mechanism moves at a uniform speed along the outer surface of the shell and sprays. Due to the existence of the non-spraying area, the spraying mechanism needs to be turned off before or when reaching the non-spraying area, and the spraying mechanism needs to be turned on again after leaving the non-spraying area. Here, it is recognized that due to the opening and closing of the spraying mechanism, an area with inconsistent coating thickness and a splashing influence area are formed along the moving direction of the spraying mechanism, which is disadvantageous to the performance of the battery cell.

[0038] In view of this, a spraying device for local spraying of the outer surface of a battery cell is provided, which can realize spraying with precise regional positioning. For the sake of clarity, this section elaborates on the case where the part to be sprayed is a battery cell or a shell of a battery cell. However, it should be understood that the spraying equipment according to the present application is not specifically used for battery cells, and it can also be used for any other type of parts to be sprayed. In addition, local spraying means that a spraying area and a non-spraying area are provided on the surface to be treated of the part to be sprayed. In other words, there are spraying areas and non-spraying areas along the direction of travel of the spraying mechanism. In addition, the coating for spraying mentioned in the present application is not limited to the above-mentioned insulating material, and it may involve any other type of material.

[0039] Figure 1 The first embodiment of the spraying device according to the present application is schematically shown. The spraying device 100 includes a spraying mechanism 110, a shielding member 120, and a conveying mechanism 130 for conveying the shielding member. For the sake of clarity, only the spray head of the spraying mechanism 110 is shown in all the drawings, and the remaining accessories are omitted, such as a paint source for providing paint, a pipeline for conveying paint, and a valve device for adjusting the spraying amount.

[0040] exist Figure 1In the embodiment, the shielding member 120 is a shielding strip, which is held above the top surface of the battery cell 200 to be sprayed and shields a portion of the top surface, wherein the projection of the shielding member 120 on the top surface below it corresponds to the reserved non-spraying area, that is, the projection of the shielding member 120 on the top surface below it is the non-spraying area. Here, there is a gap between the top surface of the battery cell 200 to be sprayed and the shielding member 120 above it, so as to prevent the shielding member from sticking to the top surface due to the paint, and to prevent the paint sprayed on the edge of the shielding member from affecting the boundary between the spraying area and the non-spraying area.

[0041] Here, it should be noted that the shielding member being located above the workpiece to be sprayed means that the shielding member is located between the spraying mechanism and the workpiece to be sprayed, that is, the shielding member is closer to the spraying mechanism than the workpiece to be sprayed in the direction from the workpiece to be sprayed to the spraying mechanism.

[0042] For example, the preset spacing between the top surface of the battery cell 200 to be sprayed and the bottom surface of the shielding member 120 facing the top surface is 2 mm to 10 mm, and further 2 mm to 5 mm. That is, the two are 2 mm to 10 mm apart, and further 2 mm to 5 mm apart, along the spraying direction of the spraying mechanism (i.e., Z direction, see the double arrows drawn in the figure).

[0043] Of course, in another feasible embodiment, during spraying, there is no preset distance between the shielding member 120 and the non-spraying area of ​​the part to be sprayed, that is, the shielding member 120 is attached to the non-spraying area of ​​the part to be sprayed. After spraying, the shielding member is lifted from the non-spraying area by an additional lifting device, and then the shielding member is moved away from the non-spraying area by means of the conveying mechanism described herein.

[0044] Exemplarily, the lifting device that can be used to lift the shielding member is integrally constructed with the conveying mechanism described in detail herein, or can be a part of the conveying mechanism.

[0045] The battery cell 200 is held on the base 140, for example, fixedly held on the base 140 by a positioning mechanism 150. Here, the positioning mechanism 150 may be part of a conveying device of a battery cell manufacturing line, the conveying device comprising a clamp (for example, in the form of a carrier plate) and a conveying mechanism (for example, in the form of a conveyor belt, a transmission roller or a robot arm), wherein the battery cell 200 is moved to the spraying device for spraying by the conveying device, and is moved away from the spraying device by the conveying device after the spraying is completed.

[0046] according to Figure 1After the battery cell is moved to and positioned at the spraying device 100, the spraying mechanism 110 moves at a uniform speed above the top surface of the battery cell 200 to be sprayed along the traveling direction (i.e., the X direction, see the double arrows drawn in the figure) to apply the paint to the top surface along the spraying direction (i.e., the Z direction); after the spraying of the entire top surface is completed, the spraying mechanism is turned off and the battery cell is moved away. During the spraying period, the spraying mechanism moves at a uniform speed along the X direction without interruption and sprays at the same time, and the non-spraying area on the top surface of the battery cell 200 is shielded by the shielding member 120, thereby achieving a spraying area with uniform thickness and a non-spraying area with clear boundaries and not contaminated or affected by the paint on the top surface.

[0047] Here, it should be understood that the uniform motion of the spraying mechanism along the travel direction is not mandatory, and the uniform motion is used to form a coating of uniform thickness on the top surface. In addition, the spraying mechanism is not mandatory to be movable, and other designs that can achieve relative motion between the spraying mechanism and the part to be sprayed are also feasible.

[0048] from Figure 1 It can also be seen that the conveying mechanism 130 for conveying the shielding member 120 includes a tape supply device 131 and a tape take-up device 132, which are respectively located on opposite sides of the battery cell 200, that is, the tape supply device 131 is located on the opposite sides of the battery cell 200. Figure 1 The belt take-up device 132 is located on the left side. Figure 1 The belt supply device 131 and the belt take-up device 132 are rollers for the shielding belt 120 to be wound around, and are fixedly fixed on the base 140 through a support plate. The shielding member 120 is moved by a tensioning wheel 133 (at Figure 1 There are four tensioning wheels in total, only one of which is marked for clarity) tensioned between the two rollers. The belt take-up device 132 implemented as a roller is equipped with an actuating device (such as a motor), which is used to drive the belt take-up device to rotate around the central axis, and drive the shielding member 120 to perform linear movement (i.e. translation) above the battery cell 200 by means of the traction force generated thereby, so as to replace the used shielding member sprayed with paint.

[0049] Here, it should be noted that the tape supply device refers to a device for providing a shielding member on the surface of which paint is not sprayed, and the shielding member not sprayed with paint can be a new unused shielding member or a used but cleaned shielding member. The tape collection device refers to a device for collecting the used shielding member sprayed with paint.

[0050] For example, in Figure 1In the embodiment shown in , the rotation angle of the two rollers is determined according to the length of the shielding member used for each spraying; and the time interval between two adjacent rotations is determined according to the spraying rhythm.

[0051] from Figure 1 It can also be seen that the tape supply device 131 and the tape take-up device 132 in the form of rollers are respectively arranged below the receiving tray 160, and the shielding member 120 passes through the through hole on the receiving tray to reach above the top surface of the battery cell to be sprayed, wherein a sealing element is provided at the through hole to prevent the collected paint from leaking.

[0052] In addition, from Figure 1 It can also be seen that a wiping device 170 is provided before the roller (i.e., the take-up device 132) for retracting the shielding member 120. The wiping device 170 may be, but is not limited to, a wiping plate or a wiping block, which contacts the surface of the shielding belt sprayed with paint to wipe off the paint thereon. By providing the wiping device, the shielding member can be reused for a second time, thereby reducing the production cost.

[0053] Figure 2 and Figure 3 A second embodiment of the spraying device according to the present application is schematically shown, wherein: Figure 3 The enlarged view corresponds to the area where the tape take-up device is located. Here, the tape supply device 131 in the form of a roller is arranged above the receiving tray 160. The tape take-up device 132 opposite to the tape supply device 131 includes a first clamp 134 and a linear drive (such as a cylinder), wherein the first clamp 134 clamps the shielding member 120 and moves along the Y direction with the shielding member 120 with the help of the linear drive. Specifically, the first clamp 134 moves away from the tape supply device 131 (at Figure 2 and Figure 3 The shielding member 120 is moved to the right along the Y direction in the figure to pull the shielding member 120 to make a linear movement on the top surface of the battery cell 200 to be sprayed, thereby replacing the shielding member sprayed with paint with a new shielding member.

[0054] from Figure 3 It can also be seen that a cutting device 180 is also provided at the belt taking-up device 132. The cutting device 180 comprises a second clamp 181 and a cutting tool 182. The second clamp 181 clamps the shielding tape 120, and the cutting tool 182 cuts off the used portion of the shielding tape 120. The cutting tool 182 is located between the second clamp 181 and the first clamp 134, so that a portion of the shielding tape still extends from the second clamp 181 after the cutting.

[0055] Exemplarily, the spraying device according to the second embodiment operates in the following manner: after the previous battery cell 200 is sprayed, the cutting tool 182 cuts off the shielding member 120 between it and the first clamp, wherein the shielding member is tensioned between the first clamp 134 and the second clamp 181; the first clamp 134 moves toward the cutting device 180 (i.e., to the left along the Y direction) under the action of the linear drive to clamp the end of the shielding band extending from the second clamp 181; the second clamp 181 releases the shielding member, and the first clamp 134 moves away from the cutting device 180 (i.e., to the right along the Y direction) together with the shielding member 120 clamped therein under the action of the linear drive to replace the shielding member 120 on the top surface of the battery cell; the first clamp 181 re-clamps the shielding member 120. Here, the movement distance of the first clamp 134 along the Y direction is determined according to the length of the shielding member used for each spraying.

[0056] Here, the above-mentioned structures of the tape supply device and the tape take-up device and the implementation of the actuators thereto are only exemplary and non-restrictive, and they can be modified as needed. For example, the tape supply device and the tape take-up device are each equipped with their own actuators to perform synchronous movement and realize the replacement of the shielding member.

[0057] Figure 4 The third embodiment of the spraying device according to the present application is shown, wherein the shielding member 120 is a shielding sheet, which may be but is not limited to a shielding sheet made of plastic. The conveying mechanism 130 is a telescopic reciprocating mechanism, and the actuating device of the conveying mechanism may be but is not limited to a cylinder. The shielding member 120 is fixed to the output end of the actuating device, wherein the shielding member 120 is moved to the top of the top surface of the battery cell to be sprayed (i.e., above the non-spraying area thereof) or moved back therefrom by the telescopic movement of the actuating device.

[0058] Specifically, refer to Figure 4 After the previous battery cell is sprayed, the shielding member 120 is moved to the left along the Y direction by the actuator, and when the next battery cell 200 is moved to and positioned at the spraying equipment, it is moved to the right along the Y direction by the actuator to move above the top surface of the battery cell and shield its non-spraying area.

[0059] from Figure 4 It can also be seen that avoidance portions are provided on the outer walls of the two receiving trays 160 facing each other, so as to allow the pillars of the positioning mechanism 150 for supporting the battery cells to pass through.

[0060] Here, it is feasible to provide a wiping device at the conveying mechanism, especially at the output end of its actuating device, which may be a wiping plate or a wiping block, to wipe and clean the surface of the shielding member that is moved back and sprayed with paint.

[0061] In accordance with Figure 4 In a modification of the embodiment of the present invention, the actuating device of the conveying mechanism may only include the telescopic reciprocating mechanism on one side of the battery cell, that is, the telescopic reciprocating mechanism arranged on the left side in the drawings.

[0062] Figure 5 A fourth embodiment of the spraying device according to the present application is shown, wherein one of the receiving trays is removed for the sake of clarity. Figure 4 The embodiment shown in FIG. 1 is different from that in Figure 5 In the figure, the square battery cell is supported on the positioning mechanism 150 with its large surface, and the side to be sprayed is the side on the left. To this end, the conveying mechanism 130 implemented as a telescopic reciprocating mechanism is fixed on the base 140, and the shielding member 120 implemented as a shielding sheet is fixed on the output end of its actuating device (such as a cylinder). The shielding member 120 is moved to the left side of the side of the battery cell (i.e., above its non-spraying area) or moved back from there through the telescopic movement of the actuating device.

[0063] Specifically, in Figure 5 In the spraying device shown, after the previous battery cell is sprayed, the shielding member 120 implemented as a shielding sheet is moved downward in the vertical direction by the actuator, and when the next battery cell 200 is moved to and positioned at the spraying device, it is moved upward in the vertical direction by the actuator to shield its non-spraying area. When spraying the housing of the battery cell, the spraying mechanism 110 moves in the X direction (i.e., the traveling direction) and applies the paint on its surface in the Z direction (i.e., the spraying direction).

[0064] In addition, combined Figure 5 In an embodiment not shown, the shielding member implemented as a shielding sheet can also be placed on a carrying plate of the positioning mechanism for carrying the battery cell, that is, the shielding sheet is placed and fixed on the carrying plate and is at the above-mentioned preset distance from the surface to be sprayed of the battery cell. During spraying, the shielding member shields the non-spraying area.

[0065] Figure 6 A fifth embodiment of the spraying device according to the present application is shown, wherein the shielding member 120 is a shielding sheet, and the conveying mechanism 130 includes an actuating device located on one side of the battery cell 200 to be sprayed, which includes a motor and a carrier 135 movably coupled to the output shaft of the motor. A plurality of shielding sheets are evenly distributed on the carrier 135 along the circumferential direction, wherein, through the rotational movement of the carrier 135 with the aid of the motor, one of the shielding sheets is placed above the battery cell to shield the non-spraying area.

[0066] Specifically, in Figure 6In the spraying device shown, when spraying the top surface of the battery cell, the spraying mechanism 110 moves along the X direction (i.e., the moving direction) and applies the paint on its surface along the Z direction (i.e., the spraying direction). Four shielding pieces are evenly distributed on the carrier 135, wherein the shielding piece 120 is replaced by rotating the carrier 135 90 degrees around its central axis with the help of a motor. In addition, a wiping device 170 is also provided adjacent to the carrier 135 to wipe and clean the surface of the used shielding piece 120 sprayed with paint.

[0067] Figure 7 The shielding member 120 of the spraying equipment according to the present application is shown, which includes a main body 121 and a support portion 122 extending from the main body. The support portion 122 is clamped on the part to be sprayed to keep the main body above the non-spraying area of ​​the top surface of the battery cell at the above-mentioned preset interval and shield the non-spraying area during spraying. This type of shielding member can be placed above the battery cell with the help of a corresponding conveying mechanism (such as a clamp or a robotic arm, etc.).

[0068] like Figure 7 As shown, the support portion 122 is clamped on the side of the battery cell housing that is angled with the top surface to be sprayed, and the main body 121 is held above the top surface and shields the non-spraying area.

[0069] Here, in an optional embodiment, the shielding member 120 is made of plastic, and the main body 121 for shielding the non-spraying area is held above the non-spraying area by the clamping action of the support portion on the workpiece to be sprayed.

[0070] In another optional embodiment, a limit block 123 is provided on the main body 121 of the shielding member 120, which is supported on the non-spraying area to maintain the above-mentioned preset distance between the main body 121 and the non-spraying area.

[0071] In summary, with the aid of the above-mentioned spraying equipment, the shielding member is placed and held above the workpiece to be sprayed through the conveying mechanism to shield its non-spraying area during spraying, thereby achieving regional precise spraying.

[0072] In addition, according to a second aspect of the present invention, a spraying method is also proposed, which is performed by means of a spraying device according to at least one of the embodiments described above. Figure 8 , which comprises the following steps:

[0073] S1: Positioning the workpiece to be sprayed relative to the spraying equipment;

[0074] S2: conveying the shielding member to the top of the workpiece to be sprayed by the conveying mechanism of the spraying equipment and keeping it above the workpiece to be sprayed at a preset distance to shield the non-spraying area of ​​the workpiece to be sprayed;

[0075] S3: Control the spraying machine to move relative to the spraying part to spray the paint on the part to be sprayed.

[0076] The spraying method according to the present application can in particular yield the advantages and features already explained with respect to the spraying device according to the present application, with respect to which reference can be made to the explanations made with respect to the spraying device according to the present application.

[0077] Finally, according to the third aspect of the present application, a battery cell is also proposed, wherein the outer surface of its shell has both a spraying area covered by a coating and a non-spraying area not covered by the coating, and the outer surface of the shell is sprayed by the above-mentioned spraying process. The battery cell is a battery cell having an internal battery cell assembly, an external cover plate (or cover plate assembly) and an external shell. The battery cell may be but is not limited to a lithium-ion battery cell, such as a lithium-ion primary battery or a lithium-ion secondary battery. In addition, the battery cell may be but is not limited to a square battery cell or a cylindrical battery cell. Specifically, in a square battery cell, a positive pole column and a negative pole column may be provided on the same cover plate, or the positive pole column and the negative pole column may be separately provided on two sides opposite to each other (i.e., a so-called blade battery, such as a short blade battery or a long blade battery). In the cylindrical battery cell, the side surface of its shell is a circumferential surface.

[0078] In this case, the battery cell according to the present application can in particular obtain the advantages and features already explained with respect to the spraying device or the spraying method according to the present application, with respect to which reference can be made to the explanations made with respect to the spraying device or the spraying method according to the present application.

[0079] It should be understood that all the above preferred embodiments are illustrative rather than restrictive, and various modifications, variations, or combinations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the legal protection scope of the present invention.

Claims

1. A spraying device for spraying a coating on a workpiece to be sprayed, wherein the workpiece to be sprayed has a spraying area and a non-spraying area, characterized in that: The spraying equipment includes a spraying mechanism, a shielding member and a conveying mechanism, wherein the spraying mechanism can move relative to the part to be sprayed to spray the part to be sprayed, and the conveying mechanism conveys the shielding member to the part to be sprayed to shield the non-spraying area through the shielding member.

2. The spraying equipment according to claim 1, characterized in that: The shielding member is held above the workpiece to be sprayed at a preset distance by the conveying mechanism, wherein a projection of the shielding member on the workpiece to be sprayed corresponds to the non-spraying area.

3. The spraying equipment according to claim 1, characterized in that: The shielding member is a shielding belt, and the conveying mechanism includes a belt supply device and a belt take-up device which are opposite to the workpiece to be sprayed, and the shielding belt is tensioned between the belt supply device and the belt take-up device, wherein the belt take-up device is equipped with an actuating device, and the traction force provided by the actuating device drives the shielding belt to perform linear motion above the workpiece to be sprayed.

4. The spraying equipment according to claim 3, characterized in that: The actuating device assigned to the belt taking-up device comprises a first clamp and a linear drive which are kinematically coupled. The first clamp clamps the shielding belt and performs linear motion together with the shielding belt through the linear drive.

5. The spraying equipment according to claim 4, characterized in that: The tape take-up device is also provided with a cutting device having a second clamp and a cutting tool. The second clamp clamps the masking tape. The cutting tool is located between the first clamp and the second clamp and is used to cut off the used part of the masking tape.

6. The spraying equipment according to claim 3, characterized in that: A wiping device is also provided at the belt taking-up device, which contacts the masking belt to wipe off the paint sprayed on the surface thereof.

7. The spraying equipment according to claim 3, characterized in that: The tape supply device and / or the tape take-up device comprises a roller on which the masking tape is wound.

8. The spraying equipment according to claim 1, characterized in that: The shielding member is a shielding sheet, and the conveying mechanism includes an actuating device, on the output end of which the shielding sheet is fixed, wherein the shielding sheet is moved to the part to be sprayed or moved back therefrom through the telescopic movement of the actuating device.

9. A spraying method, characterized in that: It can be performed by a spraying device according to any one of claims 1 to 8, comprising the following steps: Positioning the part to be sprayed relative to the spraying equipment; The shielding member is conveyed to the workpiece to be sprayed by a conveying mechanism of the spraying equipment to shield a non-spraying area of ​​the workpiece to be sprayed; The spraying mechanism is controlled to move relative to the spraying part to spray the paint on the part to be sprayed.

10. A battery cell, characterized in that: It comprises a shell, the outer surface of which is sprayed by the spraying method according to claim 9.

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