Coating device and battery processing apparatus

Abstract

A coating device (100) and a battery processing apparatus. The coating device (100) comprises: a coating die head (10), provided with a discharge opening (11); an adjusting assembly (20), provided on the coating die head (10); and a control assembly, connected to the adjusting assembly (20), the control assembly being used for measuring the actual surface density of a coating on an electrode sheet, and, according to the difference value between the actual surface density and a target surface density, controlling the adjusting assembly (20) to adjust the flowing-through area of the discharge opening (11). The control assembly measures and feeds back in real time the actual surface density of the coating, and then according to the difference value between the actual surface density and the target surface density, automatically controls the adjusting assembly (20), so as to achieve the purpose of rapidly and timely adjusting the flowing-through area of the discharge opening (11), thereby enabling the adjustment on the discharging amount to be more timely and rapid; in addition, adjustment on the basis of the difference value between the actual surface density and the target surface density improves the accuracy during the adjustment process, thereby improving the coating quality and the coating efficiency for electrode sheets.

Description

Coating device and battery processing equipment

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 2023219871329, filed on July 27, 2023, entitled “A Coating Device and Battery Processing Equipment,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a coating device and battery processing equipment. Background Art

[0004] During battery production, the electrode coating process is a crucial step in both process design and production. The quality of the coating plays a decisive role in overall battery performance. Therefore, improving coating quality and efficiency is crucial during battery production.

[0005] However, currently, during the coating process of the electrode, there is a lag in the adjustment of the discharge amount of the coating device and the adjustment accuracy is low, resulting in low final coating quality and coating efficiency of the electrode.

[0006] Summary of the Invention

[0007] Based on this, it is necessary to provide a coating device and battery processing equipment to address the problems of low accuracy and hysteresis in the adjustment of the coating slurry discharge amount during the current electrode coating process.

[0008] In a first aspect, the present application provides a coating device for coating a pole piece, the coating device comprising:

[0009] The coating die head comprises an upper die head and a lower die head which are spaced apart, and a discharge port is formed between the upper die head and the lower die head;

[0010] An adjustment assembly is provided on the upper die head; and

[0011] The control component is connected to the regulating component, and is used to detect the actual surface density of the coating on the electrode piece, and control the regulating component to adjust the flow area of ​​the discharge port according to the difference between the actual surface density and the target surface density;

[0012] The adjustment component is configured to adjust the flow area of ​​the discharge port by adjusting the spacing distance between the upper die head and the lower die head.

[0013] By real-time monitoring of the actual surface density of the electrode coating by the control component, the coating quality of the electrode coating can be promptly reflected. Furthermore, the control component automatically controls the flow area of ​​the discharge port based on the difference between the actual surface density and the target surface density, thereby more flexibly adjusting the discharge volume of the discharge port, ensuring that the actual surface density of the electrode coating meets production requirements, thereby improving coating quality and efficiency.

[0014] In some embodiments, the adjustment component includes an adjustment member and a first drive member that are drive-connected. The adjustment member is movably disposed on the coating die head, and at least a portion of the adjustment member is located in the discharge port. The first drive member is communicatively connected to the control component and is used to drive the adjustment member to move in the discharge port to adjust the flow area of ​​the discharge port.

[0015] By driving the adjusting member to move in the discharge port through the first driving member, the flow area of ​​the discharge port can be quickly adjusted, and the discharge amount of the discharge port can be adjusted, thereby improving the coating quality of the electrode.

[0016] In some embodiments, the discharge port is longitudinally extended along the first direction, the adjusting member includes a plurality of adjusting sub-members arranged along the first direction, and each adjusting sub-member is movably disposed in the discharge port along the second direction;

[0017] The first direction, the second direction and the opening direction of the discharge port are arranged to intersect with each other.

[0018] By cooperating with the discharge port, the discharge port can be divided into different discharge ports along the first direction. By adjusting the flow area of ​​the corresponding discharge port by each adjustment member, the amount of slurry applied to the coating area corresponding to the discharge port can be specifically adjusted. This allows for more accurate adjustment of the coating quality on the electrode.

[0019] In some embodiments, the coating device further comprises a moving assembly disposed on the coating die head, the moving assembly being connected to the first driving member and being in communication with the control assembly;

[0020] The moving assembly is used for driving the first driving member to move along the first direction, so that the first driving member can drive each adjusting sub-member to move along the second direction.

[0021] Through the control of the control component, the moving component can drive the first driving component to move flexibly in the first direction, so that the first driving component can be more accurately connected with the corresponding adjusting sub-component, thereby accurately adjusting the coating quality on the pole piece at the position corresponding to the adjusting sub-component.

[0022] In some embodiments, a connector is protruding from one of each adjusting sub-component and the first driving component, and a slot is provided on the other of each adjusting sub-component and the first driving component. Each adjusting sub-component and the first driving component are plugged into each other through the connector and the slot.

[0023] Through the cooperation of the plug-in component and the slot, the first driving component can be quickly connected and separated from different adjusting sub-components, so that the different adjusting sub-components can be driven to move in the discharge port by the first driving component, and the flow area of ​​the discharge port at different positions in the first direction can be more flexibly adjusted.

[0024] In some embodiments, the moving assembly includes a second driving member, a guide member, and a transmission member, wherein the guide member extends along a first direction and is disposed on the coating die head, the transmission member is movably disposed on the guide member along the first direction and is respectively connected to the first driving member and the second driving member, and the second driving member is communicatively connected to the control assembly;

[0025] The transmission member is configured to be able to drive the first driving member to move along the first direction under the drive of the second driving member.

[0026] Thus, the second driving member can, under the control of the control component, drive the transmission member to move along the first direction under the guidance of the guide member, thereby driving the first driving member to move in the first direction, so that the first driving member can move more accurately and flexibly to the position corresponding to the corresponding adjustment sub-member, thereby smoothly driving the adjustment sub-member to move in the discharge port.

[0027] In some embodiments, the control component includes a detection component and a control component that are communicatively connected. The detection component is used to detect the actual surface density coated on the electrode, and the control component is used to receive the actual surface density and compare it with the target surface density to obtain a difference, so as to control the adjustment component to adjust the flow area of ​​the discharge port according to the difference.

[0028] By setting up detection components and control components, the actual surface density of the coated area on the electrode can be detected in real time and fed back to the control component in a timely manner. The control component can quickly compare the actual surface density with the target surface density, thereby timely controlling the adjustment component to make corresponding operations, so that the actual surface density can gradually approach the target surface density, or be equal to the target surface density, thereby improving the coating quality and coating efficiency of the electrode.

[0029] In some embodiments, the coating device also includes a piezoelectric sensor communicatively connected to the control component, the piezoelectric sensor is connected to each adjustment sub-component, and the piezoelectric sensor is configured to adjust the movement distance of the corresponding adjustment sub-component in the second direction according to the actual output voltage of each adjustment sub-component.

[0030] The piezoelectric sensor can flexibly adjust the flow area of ​​the discharge port according to the actual output voltage in the coating device, and cooperate with the parameters of the actual surface density on the coated electrode to more comprehensively reflect the coating quality on the electrode, thereby improving the accuracy of the coating process adjustment.

[0031] In some embodiments, the coating device further includes a displacement sensor communicatively connected to the control component, the displacement sensor is connected to each adjusting sub-component, and is used to detect the movement distance of each adjusting sub-component in the second direction.

[0032] By detecting and feeding back the moving distance of the regulating sub-component in the second direction through the displacement sensor, it is possible to combine the actual surface density, the actual output voltage of the regulating sub-component and the actual moving distance of the regulating sub-component, so that real-time feedback adjustment can be made during the adjustment process, thereby realizing intelligent closed-loop control of the regulating component and effectively improving the coating quality and efficiency.

[0033] In a second aspect, the present application provides a battery processing device comprising the coating device as described above.

[0034] In the above-mentioned coating device and battery processing equipment, during the process of coating the electrode, the control component can detect the actual surface density of the slurry coated on the electrode in real time, and then control the adjustment component according to the difference between the actual surface density and the target surface density, and adjust the flow area of ​​the discharge port through the adjustment component, thereby adjusting the discharge amount of the slurry extruded from the discharge port, thereby changing the actual surface density of the slurry coated on the electrode so that it approaches or reaches the target surface density requirement; thus, the control component detects and feeds back the actual surface density of the coating in real time, and then automatically controls the adjustment component according to the difference between the actual surface density and the target surface density, thereby achieving the purpose of quickly and timely adjusting the flow area of ​​the discharge port, which can make the adjustment of the discharge amount more timely and rapid, and by adjusting the difference between the actual surface density and the target surface density, it can improve the accuracy of the adjustment process and improve the coating quality and coating efficiency of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic structural diagram of a coating device according to one or more embodiments.

[0036] FIG2 is a partial enlarged view of point A in FIG1 .

[0037] FIG3 is a schematic structural diagram of a coating device according to one or more embodiments.

[0038] Explanation of the accompanying drawings: 100, coating device; 10, coating die; 20, adjusting assembly; 30, moving assembly; 11, discharge port; 12, upper die; 13, lower die; 21, adjusting member; 22, first driving member; 31, second driving member; 32, guide member; 33, transmission member; 211, adjusting sub-member; 221, plug-in member; 2111, slot; a, first direction; b, second direction; c, opening direction. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if the terms "length", "width", "thickness", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 this application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0042] It should be noted that if an element is referred to as being “disposed on” another element, it may be directly on the other element or there may be an intermediate element. If an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0043] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in other fields. As the application of power batteries continues to expand, market demand is also growing.

[0044] A battery cell is the smallest unit that makes up a battery. A battery is usually composed of multiple battery cells connected in series, parallel, or in a mixed connection. Among them, a mixed connection refers to multiple battery cells being connected in both series and parallel.

[0045] A battery cell may include a top cover, a housing, and an electrode assembly. The top cover seals over the opening of the housing, thereby forming an internal environment for the electrode assembly. The electrode assembly is the component of the battery cell where the electrochemical reaction occurs. It is primarily composed of a positive electrode sheet and a negative electrode sheet wound or stacked, with a separator typically placed between the positive and negative electrode sheets.

[0046] Among them, the positive electrode sheet and the negative electrode sheet are formed by coating a layer of active material layer on the electrode sheet. The positive electrode sheet is formed by coating a layer of positive electrode active material layer on the electrode sheet, while the negative electrode sheet is formed by coating a layer of negative electrode active material layer on the electrode sheet.

[0047] Specifically, the battery's charge and discharge are achieved through the reaction between the positive and negative active material layers and the electrolyte in the housing. Therefore, the coating quality of the positive or negative active material layer on the electrode directly affects the battery's performance.

[0048] However, the current electrode coating process typically involves observing the coating state of the active material layer on the electrode and manually adjusting the coating device's discharge rate to adjust the coating quality. This adjustment method suffers from poor accuracy. Furthermore, it's difficult to adjust the subsequent coating quality in a timely manner based on changes in the physical properties of the slurry extruded by the coating device, resulting in hysteresis in the adjustment process, which in turn affects the electrode coating quality and efficiency.

[0049] In order to solve the problem that the adjustment of the discharge amount of the coating device in the current electrode coating process has a hysteresis and the accuracy of the discharge amount adjustment is low, one or more embodiments of the present application propose a coating device, in which, during the coating process of the electrode, the control component can detect the actual surface density of the slurry coated on the electrode in real time, and then control the adjustment component according to the difference between the actual surface density and the target surface density, and adjust the flow area of ​​the discharge port through the adjustment component, thereby adjusting the discharge amount of the slurry extruded from the discharge port, thereby changing the actual surface density of the slurry coated on the electrode so that it approaches or reaches the target surface density requirement. Thus, the control component detects and feeds back the actual surface density of the coating in real time, and then automatically controls the adjustment component according to the difference between the actual surface density and the target surface density, thereby achieving the purpose of quickly and timely adjusting the flow area of ​​the discharge port, which can make the adjustment of the discharge amount more timely and rapid, and adjust the difference between the actual surface density and the target surface density, which can improve the accuracy of the adjustment process and improve the coating quality and coating efficiency of the electrode.

[0050] Referring to FIG1 , an embodiment of the present application provides a coating device 100 for coating an electrode. The coating device 100 includes a coating die 10, an adjustment component 20, and a control component (not shown). The coating die 10 has a discharge port 11. The adjustment component 20 is disposed on the coating die 10, and the control component is connected to the adjustment component 20. The control component is used to detect the actual surface density of the coating on the electrode, and control the adjustment component 20 to adjust the flow area of ​​the discharge port 11 according to the difference between the actual surface density and the target surface density.

[0051] It should be noted that the electrode sheet refers to a component that provides support and a coating base for the slurry, allowing the slurry to form an active material layer thereon, ultimately forming a positive electrode sheet or a negative electrode sheet. The slurry coated on the electrode sheet can be either a positive electrode active material or a negative electrode active material.

[0052] The coating die 10 is a structure capable of holding slurry and extruding the slurry through the discharge port 11 onto the electrode. The coating die 10 may include an upper die 12 and a lower die 13 spaced apart, with the discharge port 11 formed between the upper die 12 and the lower die 13. A receiving groove is provided on the side of the lower die 13 facing the upper die 12. The receiving groove is connected to the discharge port 11 and can be used to hold the slurry so that the slurry can be smoothly extruded from the discharge port 11.

[0053] Furthermore, the adjustment component 20 is arranged on the upper die head 12. The adjustment component 20 can adjust the flow area of ​​the discharge port 11 by adjusting the spacing distance between the upper die head 12 and the lower die head 13, thereby adjusting the discharge amount of the slurry extruded from the discharge port 11.

[0054] The flow area of ​​the discharge port 11 refers to the area of ​​the cross section of the discharge port 11 cut by a plane perpendicular to the direction of its opening. The larger the flow area of ​​the discharge port 11, the greater the amount of slurry discharged from the discharge port 11. Conversely, the smaller the flow area of ​​the discharge port 11, the smaller the amount of slurry discharged from the discharge port 11.

[0055] The control component refers to a component that can detect the actual surface density of the slurry coated on the electrode, compare the actual surface density detected with the target surface density preset inside itself to obtain the difference between the two, and control the adjustment component 20 according to the difference, thereby adjusting the flow area of ​​the discharge port 11.

[0056] It can be understood that areal density refers to the mass of active material slurry per unit area of ​​the electrode. The actual areal density is the actual mass of active material slurry applied per unit area of ​​the electrode, while the target areal density is the theoretical mass of active material slurry required to be applied per unit area of ​​the electrode. When the actual mass of active material slurry applied to the electrode is equal to or close to the theoretical mass, the electrode can achieve good coating quality.

[0057] Specifically, the slurry is filled into the holding tank. During the coating process, the slurry is squeezed out of the discharge port 11 and coated onto the electrode. The control component detects the slurry coated on the electrode in real time. When it is detected that the actual surface density of the coating on the electrode is lower than the target surface density, the control component controls the adjustment component 20 to increase the flow area of ​​the discharge port 11 and increase the discharge volume of the discharge port 11. When it is detected that the actual surface density of the coating on the electrode is higher than the target surface density, the control component controls the adjustment component 20 to reduce the flow area of ​​the discharge port 11 and reduce the discharge volume of the discharge port 11.

[0058] Thus, by real-time detection of the actual surface density of the electrode coating by the control component, the coating quality of the electrode coating can be promptly reflected. Furthermore, the control component automatically controls the adjustment component 20 to adjust the flow area of ​​the discharge port 11 based on the difference between the actual surface density and the target surface density, thereby more flexibly adjusting the discharge volume of the discharge port 11, so that the actual surface density of the electrode coating meets production requirements, thereby improving the coating quality and coating efficiency.

[0059] In some embodiments, the adjustment component 20 includes an adjustment member 21 and a first drive member 22 that are drive-connected. The adjustment member 21 is movably disposed on the coating die 10, and at least a portion of the adjustment member 21 is located in the discharge port 11. The first drive member 22 is communicatively connected to the control component and is used to drive the adjustment member 21 to move in the discharge port 11 to adjust the flow area of ​​the discharge port 11.

[0060] Specifically, the adjusting member 21 is movably disposed on the upper die head 12, and the adjusting member 21 is inserted into the upper die head 12 from top to bottom, so that at least a portion of the adjusting member 21 is located within the discharge port 11. The first driving member 22 is communicatively connected to the control assembly and is drivingly connected to the adjusting member 21. Under the control of the control assembly, the first driving member 22 can drive the adjusting member 21 to move within the discharge port 11. During the movement of the adjusting member 21 within the discharge port 11, the discharge port 11 can be partially blocked. By adjusting the area of ​​the discharge port 11 blocked by the adjusting member 21, the flow area of ​​the discharge port 11 can be adjusted.

[0061] When the control component detects that the actual surface density of the coating on the electrode is lower than the target surface density, based on the difference between the two, the control component controls the first driving member 22 to drive the adjusting member 21 to move in the discharge port 11, so that the area of ​​the discharge port 11 blocked by the adjusting member 21 is reduced. At this time, the flow area of ​​the discharge port 11 increases, the discharge amount of the discharge port 11 increases, and the actual surface density of the coating on the electrode increases.

[0062] When the control component detects that the actual surface density coated on the electrode is higher than the target surface density, based on the difference between the two, the control component controls the first driving member 22 to drive the adjusting member 21 to move in the discharge port 11, so that the area of ​​the discharge port 11 blocked by the adjusting member 21 increases. At this time, the flow area of ​​the discharge port 11 decreases, the discharge amount of the discharge port 11 decreases, and the actual surface density coated on the electrode decreases.

[0063] Therefore, by driving the adjusting member 21 to move in the discharge port 11 through the first driving member 22, the flow area of ​​the discharge port 11 can be quickly adjusted, and the discharge amount of the discharge port 11 can be adjusted, thereby improving the coating quality of the electrode.

[0064] In some embodiments, the discharge port 11 extends longitudinally along a first direction a, and the adjustment member 21 includes a plurality of adjustment sub-members 211 arranged along the first direction a. Each adjustment sub-member 211 is movably disposed within the discharge port 11 along a second direction b. The first direction a, the second direction b, and the opening direction c of the discharge port 11 intersect with each other.

[0065] It should be noted that the electrode sheet usually has a certain width. When coating the electrode sheet, in order to more evenly coat the slurry on the electrode sheet, the first direction a is set to the width direction of the electrode sheet, that is, the discharge port 11 extends longitudinally along the width direction of the electrode sheet. During coating, the extension length of the discharge port 11 matches the width of the electrode sheet to be coated. The electrode sheet moves along its own length direction, and the discharge port 11 continuously extrudes the slurry. As the electrode sheet moves, the slurry is evenly coated on the electrode sheet.

[0066] Specifically, the first direction a, the second direction b and the opening direction c of the discharge port 11 are arranged perpendicular to each other. During the coating process, the first direction a is the width direction of the electrode piece, the opening direction c of the discharge port 11 is the length direction of the electrode piece, and the second direction b is the thickness direction of the electrode piece.

[0067] All the adjusting sub-components 211 are arranged on the upper die head 12 along the first direction a, and each adjusting sub-component 211 is movably arranged in the discharge port 11 along the second direction b. Thus, all the adjusting sub-components 211 divide the discharge port 11 into multiple discharge sub-ports along the first direction a. Each adjusting sub-component 211 can adjust the flow area of ​​the corresponding discharge sub-port by moving along the second direction b in the corresponding discharge sub-port, so that the actual surface density of the coating slurry at different positions along the width direction of the electrode can be adjusted by each adjusting sub-component 211.

[0068] For example, when the number of regulating sub-components 211 is N, the electrode piece can be divided into N regions in the width direction, and each region corresponds to a group of discharge sub-ports and regulating sub-components 211. When the control component detects that the actual surface density of the Mth (0≤M≤N)th region on the electrode piece is higher than the target surface density, the control component controls the Mth regulating sub-component 211 to move downward a certain distance according to the difference between the actual surface density and the target surface density, so that the regulating sub-component 211 blocks the Mth discharge sub-port, reduces the flow area of ​​the corresponding discharge sub-port, reduces the discharge amount of the extruded slurry in the discharge sub-port, and thus reduces the actual surface density of the region.

[0069] Furthermore, each adjusting sub-component 211 may include an interconnected adjusting screw and an adjusting block. Each adjusting screw is vertically mounted on the upper die head 12, and the adjusting block is disposed at the lower end of the adjusting screw, and the adjusting block is located within the discharge port 11. The first driving member 22 may be configured as a driving cylinder, which is connected to the adjusting screw and is capable of driving the adjusting screw to move up and down, thereby driving the adjusting block to move up and down within the discharge port 11, thereby adjusting the flow area of ​​the discharge port 11.

[0070] By cooperating with the discharge port 11, the discharge port 11 can be divided into different discharge sub-ports along the first direction a. By adjusting the flow area of ​​the corresponding discharge sub-port by each adjusting sub-port 211, the amount of slurry applied to the coating area corresponding to the discharge sub-port can be specifically adjusted. This allows for more accurate adjustment of the coating quality on the electrode.

[0071] In some embodiments, the coating device 100 further includes a moving assembly 30 disposed on the coating die head 10. The moving assembly 30 is connected to the first driving member 22 and is in communication with the control assembly. The moving assembly 30 is configured to drive the first driving member 22 to move along the first direction a, so that the first driving member 22 can drive each adjusting sub-member 211 to move along the second direction b.

[0072] Specifically, the moving component 30 is arranged on the upper die head 12 and can move along the first direction a under the control of the control component, thereby driving the first driving member 22 to move in the first direction a, so that the first driving member 22 can be connected to the corresponding adjusting sub-component 211.

[0073] For example, when the control component detects that the actual surface density of the Mth area on the electrode is higher than the target surface density, the control component first controls the moving component 30 to move in the first direction a, so that the moving component 30 drives the first driving member 22 to move in the first direction a to the position of the Mth regulating sub-component 211. Then, the first driving member 22 is connected to the Mth regulating sub-component 211. The control component controls the first driving member 22 to drive the Mth regulating sub-component 211 to move downward a certain distance based on the difference between the actual surface density and the target surface density, so that the regulating sub-component 211 blocks the Mth discharge sub-port, reduces the flow area of ​​the corresponding discharge sub-port, and reduces the discharge amount of the extruded slurry from the discharge sub-port, thereby reducing the actual surface density of the Mth area.

[0074] Therefore, through the control of the control component, the moving component 30 can drive the first driving member 22 to move flexibly in the first direction a, so that the first driving member 22 can be more accurately connected to the corresponding adjusting sub-component 211, thereby accurately adjusting the coating quality on the pole piece at the position corresponding to the adjusting sub-component 211.

[0075] Please refer to Figures 1 and 2. In some embodiments, a connector 221 is protruding from each adjusting sub-component 211 and one of the first driving component 22, and a slot 2111 is provided on each adjusting sub-component 211 and the other of the first driving component 22. Each adjusting sub-component 211 and the first driving component 22 are plugged into each other through the connector 221 and the slot 2111.

[0076] Specifically, when the adjusting sub-component 211 is configured as an adjusting screw and the first driving member 22 is configured as a driving cylinder, a slot 2111 is defined on the top surface of each adjusting screw, and a connector 221 is protruded from the bottom surface of the driving cylinder to engage with the slot 2111. When the first driving member 22 moves to the position corresponding to the adjusting sub-component 211, it moves downward, inserting the connector 221 into the slot 2111 of the corresponding adjusting sub-component 211, thereby achieving a plug-in connection between the first driving member 22 and the adjusting sub-component 211. At this point, the adjusting sub-component 211 can be driven upward or downward by the first driving member 22, thereby adjusting the flow area of ​​the discharge outlet corresponding to the adjusting sub-component 211.

[0077] It is understandable that a slot 2111 may be provided on the first driving member 22, and a connector 221 may be provided on the adjusting sub-member 211 to cooperate with the slot 2111. When the first driving member 22 moves downward, the connector 221 on the corresponding adjusting sub-member 211 is inserted into the slot 2111 of the first driving member 22, thereby achieving the connection and cooperation between the first driving member 22 and the adjusting sub-member 211.

[0078] Through the cooperation between the plug-in component 221 and the slot 2111, the first driving component 22 and different adjusting sub-components 211 can be quickly connected and separated, so that the first driving component 22 drives the different adjusting sub-components 211 to move in the discharge port 11, and the flow area of ​​the discharge port 11 at different positions in the first direction a can be more flexibly adjusted.

[0079] Referring to Figures 1 and 3 , in some embodiments, the moving assembly 30 includes a second driving member 31, a guide member 32, and a transmission member 33. The guide member 32 extends along a first direction a and is disposed on the coating die head 10. The transmission member 33 is movably disposed on the guide member 32 along the first direction a and is respectively connected to the first driving member 22 and the second driving member 31. The second driving member 31 is communicatively connected to the control assembly. The transmission member 33 is configured to drive the first driving member 22 to move along the first direction a when driven by the second driving member 31.

[0080] Specifically, the second driving member 31 can be, but is not limited to, configured as a driving motor, the guide member 32 can be, but is not limited to, configured as a guide rail or a guide groove, and the transmission member 33 can be, but is not limited to, configured as a slider or a moving chain.

[0081] Under the control of the control component, the second driving member 31 can drive the transmission member 33 to move along the first direction a under the guidance of the guide member 32, thereby driving the first driving member 22 to move in the first direction a, so that the first driving member 22 can move more accurately and flexibly to the position corresponding to the corresponding adjustment sub-member 211, thereby smoothly driving the adjustment sub-member 211 to move in the discharge port 11.

[0082] In some embodiments, the control component includes a detection component and a control component that are communicatively connected. The detection component is used to detect the actual surface density coated on the electrode, and the control component is used to receive the actual surface density and compare it with the target surface density to obtain a difference, so as to control the adjustment component 20 to adjust the flow area of ​​the discharge port 11 according to the difference.

[0083] The detection element can be, but is not limited to, a scanning head. The detection element is used to detect the actual surface density of the coated area on the electrode and feed the detected actual surface density back to the control element. The target surface density is preset within the control element, which compares the actual surface density with the target surface density to obtain the difference between the two. Based on the obtained difference, the control element can control the adjustment component 20 to perform corresponding operations to gradually bring the actual surface density closer to the target surface density, or to equal the target surface density.

[0084] By setting up detection components and control components, the actual surface density of the coated area on the electrode can be detected in real time and fed back to the control component in a timely manner. The control component can quickly compare the actual surface density with the target surface density, thereby timely controlling the adjustment component 20 to perform corresponding operations, so that the actual surface density can gradually approach the target surface density, or be equal to the target surface density, thereby improving the coating quality and coating efficiency of the electrode.

[0085] In some embodiments, the coating device 100 also includes a piezoelectric sensor (not shown in the figure) that is communicatively connected to the control component. The piezoelectric sensor is connected to each adjustment sub-component 211, and the piezoelectric sensor is configured to be able to adjust the movement distance of the corresponding adjustment sub-component 211 in the second direction b according to the actual output voltage of each adjustment sub-component 211.

[0086] Specifically, the piezoelectric sensor may include a piezoelectric ceramic built into the coating device 100. According to the characteristics of the piezoelectric ceramic, when the actual output voltage of the regulating sub-component 211 exceeds the preset range, the piezoelectric ceramic will form a certain deformation amount according to the voltage difference. Under the action of the deformation amount, the regulating sub-component 211 moves a certain distance along the second direction b, thereby changing the flow area of ​​the discharge sub-port corresponding to the regulating sub-component 211.

[0087] The piezoelectric sensor can flexibly adjust the flow area of ​​the discharge port 11 according to the actual output voltage in the coating device 100, and cooperate with the parameters of the actual surface density on the coated electrode to more comprehensively reflect the coating quality on the electrode, thereby improving the accuracy of the coating process adjustment.

[0088] In some embodiments, the coating device 100 further includes a displacement sensor (not shown) in communication with the control component. The displacement sensor is connected to each adjusting sub-component 211 and is used to detect the movement distance of each adjusting sub-component 211 in the second direction b.

[0089] Specifically, the displacement sensor can be used to measure the movement distance of each adjusting sub-component 211 in the second direction b. It is understandable that the displacement sensor can be, but is not limited to, a potentiometer displacement sensor, an inductive displacement sensor, a capacitive displacement sensor, an eddy current displacement sensor, a Hall displacement sensor, etc.

[0090] When each regulating sub-component 211 moves once in the second direction b under the drive of the first driving member 22, the displacement sensor records the distance moved by the regulating sub-component 211. After the movement, the detection member detects the actual surface density of the area on the pole piece corresponding to the regulating sub-component 211 in real time and feeds this information back to the control member. The control member compares the actual surface density with the target surface density and, based on the difference between the two, controls the first driving member 22 to cause the regulating sub-component 211 to move a second time in the second direction b. The displacement sensor records the distance moved by the regulating sub-component 211 this second time.

[0091] After the displacement sensor feeds back the two moving distances to the control component, the control component can adjust the next moving distance of the first driving component 22 driving the adjusting sub-component 211 in the second direction b based on the relationship between the two moving distances and the change in actual surface density after the two movements, thereby improving the adjustment accuracy.

[0092] For example, if the target surface density is Y and the detection component detects the actual surface density as X1 (X1 < Y), the difference between the actual surface density and the target surface density is Y-X1. At this time, the control component controls the first driving component 22 to drive the adjusting component 211 to move upward a certain distance, and the displacement sensor records this distance as L1.

[0093] After the first movement, the detection member continues to detect that the actual surface density has changed to X2 (X2 < Y). The difference between the actual surface density and the target surface density is Y-X2. At this time, the control member controls the first driving member 22 to drive the adjusting member 211 to move upward a certain distance, and the displacement sensor records this distance as L2.

[0094] At this time, the change between L1 and L2 corresponds to the change between X1 and X2. After the second movement, the detection component continues to detect that the actual surface density has changed to X3 (X3 < Y). The control component can adjust the movement distance of the adjustment sub-component 211 accordingly based on the change between X3 and X2, thereby improving the adjustment accuracy and allowing the actual surface density to be adjusted to be close to or equal to the target surface density more quickly, thereby improving the adjustment efficiency.

[0095] By detecting and feeding back the moving distance of the regulating sub-component 211 in the second direction b through the displacement sensor, it is possible to combine the actual surface density, the actual output voltage of the regulating sub-component 211 and the actual moving distance of the regulating sub-component 211, so that real-time feedback adjustment can be performed during the adjustment process, thereby realizing intelligent closed-loop control of the regulating component 20 and effectively improving the coating quality and efficiency.

[0096] Based on the same concept as the above-mentioned coating device 100 , the present application provides a battery processing device, including the above-mentioned coating device 100 .

[0097] According to one or more embodiments, during the coating process of the electrode, the actual surface density of the coated area on the electrode is first detected in real time by the detection member, and the actual surface density is fed back to the control member. The control member controls the second driving member 31 to drive the first driving member 22 to move along the first direction a, so that the first driving member 22 moves to the position corresponding to the adjustment sub-member 211 that needs to be adjusted.

[0098] The control component controls the first driving component 22 to move downward and connect with the corresponding regulating sub-component 211. The control component compares the actual surface density with the target surface density and obtains the difference between the two. According to the difference, the control component controls the first driving component 22 to drive the regulating sub-component 211 connected thereto to move in the second direction b, thereby adjusting the flow area of ​​the corresponding discharge sub-port, adjusting the discharge amount of the discharge sub-port, and thus adjusting the actual surface density coated on the electrode at this position.

[0099] At the same time, the piezoelectric sensor can sense the actual output voltage of the regulating sub-component 211. When the actual output voltage exceeds the preset range, the piezoelectric sensor can produce a certain deformation variable. Under the influence of the deformation variable, the regulating sub-component 211 moves in the second direction b to a certain extent, thereby further adjusting the flow area of ​​the discharge port 11.

[0100] Furthermore, the displacement sensor records the movement distance of the adjusting sub-component 211 in the second direction b, and feeds back the movement distance of each time to the control component. The control component can adjust the movement distance of the adjusting sub-component 211 in the subsequent adjustment process according to the movement distance of each time and the change in actual surface density after each adjustment, thereby realizing closed-loop control of the adjustment process.

[0101] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A coating device for coating a pole piece, the coating device comprising: The coating die head comprises an upper die head and a lower die head which are arranged at an interval, and a discharge port is formed between the upper die head and the lower die head; An adjustment component is arranged on the upper die head; as well as A control component connected to the regulating component, the control component is used to detect the actual surface density of the coating on the electrode piece, and control the regulating component to adjust the flow area of ​​the discharge port according to the difference between the actual surface density and the target surface density; Wherein, the adjustment component is configured to be able to adjust the flow area of ​​the discharge port by adjusting the spacing distance between the upper die head and the lower die head.

2. The coating device according to claim 1, wherein: The adjusting component includes an adjusting member and a first driving member which are drive-connected. The adjusting member is movably arranged on the coating die head, and at least a portion of the adjusting member is located in the discharge port. The first driving member is communicatively connected to the control component and is used to drive the adjusting member to move in the discharge port to adjust the flow area of ​​the discharge port.

3. The coating device according to claim 2, wherein: The discharge port is longitudinally extended along a first direction, the adjusting member includes a plurality of adjusting sub-members arranged along the first direction, and each of the adjusting sub-members is movably arranged in the discharge port along a second direction; The first direction, the second direction and the opening direction of the discharge port are arranged to intersect each other.

4. The coating device according to claim 3, wherein: The coating device further comprises a moving component disposed on the coating die head, wherein the moving component is connected to the first driving member and is in communication connection with the control component; The moving assembly is used to drive the first driving member to move along the first direction, so that the first driving member can drive each of the adjusting sub-members to move along the second direction.

5. The coating device according to claim 4, wherein: A plug-in component is protrudingly provided on one of each of the adjusting sub-component and the first driving component, and a slot is provided on each of the adjusting sub-component and the other of the first driving component. Each of the adjusting sub-component and the first driving component is plugged into and matched with each other through the plug-in component and the slot.

6. The coating device according to claim 4 or 5, wherein: The moving assembly includes a second driving member, a guide member and a transmission member, wherein the guide member is extended along the first direction and arranged on the coating die head, the transmission member is movably arranged on the guide member along the first direction and is respectively connected to the first driving member and the second driving member, and the second driving member is communicatively connected to the control assembly; The transmission member is configured to be able to drive the first driving member to move along the first direction under the drive of the second driving member.

7. The coating device according to any one of claims 4 to 6, wherein: The control component includes a detection component and a control component which are communicatively connected, the detection component is used to detect the actual surface density coated on the electrode, and the control component is used to receive the actual surface density and compare it with the target surface density to obtain a difference, so as to control the adjustment component to adjust the flow area of ​​the discharge port according to the difference.

8. The coating device according to claim 7, wherein: The coating device also includes a piezoelectric sensor that is communicatively connected to the control component, the piezoelectric sensor is connected to each of the adjusting sub-components, and the piezoelectric sensor is configured to be able to adjust the movement distance of the corresponding adjusting sub-component in the second direction according to the actual output voltage of each adjusting sub-component.

9. The coating device according to claim 8, wherein: The coating device further comprises a displacement sensor which is communicatively connected to the control component, and the displacement sensor is connected to each of the adjusting sub-components and is used to detect the moving distance of each of the adjusting sub-components in the second direction.

10. A battery processing equipment, comprising the coating device according to any one of claims 1 to 9.

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