Device for detecting density of coating surface of pole piece

Abstract

The utility model relates to the technical field of coating surface density detection devices, and discloses a coating surface density detection device of a pole piece, which comprises a plurality of ray emitters and a plurality of ray receivers, the ray emitters and the ray receivers are arranged in one-to-one correspondence, and the ray emitters are used for emitting rays capable of penetrating through the pole piece to the pole piece; the ray receivers are used for receiving rays emitted by the corresponding ray emitters and penetrating through the pole piece, the light spot areas formed by the rays emitted by the plurality of ray emitters on the pole piece are the same, and the plurality of ray emitters are used for emitting rays to the same position of the pole piece, so that a plurality of light spots formed by the plurality of ray emitters on the pole piece coincide; and the working voltages of the at least two ray emitters are different. Therefore, the surface density of the pole piece is detected through the coating surface density detection device, and the surface density of each active material layer on the pole piece can be detected at the same time, so that the detection precision can be improved, and the product percent of pass can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coating surface density detection device technical field especially, it is a kind of coating surface density detection device of pole piece. BACKGROUND

[0002] In the related art, the existing coating surface density detection device includes a ray emitter and a ray receiver, the ray emitter and the ray receiver are located on opposite sides of the pole piece, the ray emitter emits a ray to the pole piece, and the ray is detected by the ray receiver after penetrating the pole piece, so as to detect the coating surface density of the pole piece.

[0003] In the case of coating multiple active material layers on the pole piece, the materials contained in each layer of active material layer may differ, and this structural change not only improves the performance of the battery, but also puts forward almost stringent high-precision requirements for the weight consistency (surface density) of each layer of active material coated in the production process. Each layer of coating deviation may be amplified, which ultimately affects the overall capacity, uniformity and safety of the battery. However, the existing coating surface density detection device can only detect the surface density of a layer of active material, and cannot simultaneously detect the surface density of multiple layers of active material, thereby affecting the detection accuracy and reducing the product pass rate. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in prior art. To this end, one purpose of the utility model is to provide a coating surface density detection device for pole piece, which can detect the surface density of each layer of active material on the pole piece simultaneously, thereby improving the detection accuracy and improving the product pass rate.

[0005] According to the coating surface density detection device for pole piece of the first aspect embodiment of the utility model, it comprises:

[0006] The ray emitting mechanism and the ray receiving mechanism are opposite and spaced apart along the first direction, the ray emitting mechanism includes a plurality of ray emitters, the ray receiving mechanism includes a plurality of ray receivers, the plurality of ray emitters and the plurality of ray receivers are one-to-one corresponding, and the ray emitter is used to emit a ray that can penetrate the pole piece to the pole piece, and the ray receiver is used to receive the ray emitted by the corresponding ray emitter and penetrating the pole piece, wherein the rays emitted by the plurality of ray emitters form the same spot area on the pole piece, the plurality of ray emitters are used to emit rays to the same position of the pole piece, so that the plurality of spots formed by the plurality of ray emitters on the pole piece coincide, and the operating voltages of at least two ray emitters are different.

[0007] In the technical solution, the surface density of the pole piece is detected by the coating surface density detection device, the surface density of each active material layer on the pole piece can be detected at the same time, the detection accuracy is improved, and the product qualification rate is improved.

[0008] In some embodiments, the plurality of ray emitters are arranged along the circumference of the first plane, and the first plane is perpendicular to the first direction.

[0009] In the technical solution, the surface density of the pole piece is detected by the coating surface density detection device, the surface density of each active material layer on the pole piece can be detected at the same time, the detection accuracy is improved, and the product qualification rate is improved.

[0010] In some embodiments, the plurality of ray emitters are arranged along the circumference of the first plane, and the first plane is perpendicular to the first direction.

[0011] In the technical solution, the surface density of the pole piece is detected by the coating surface density detection device, the surface density of each active material layer on the pole piece can be detected at the same time, the detection accuracy is improved, and the product qualification rate is improved.

[0012] In some embodiments, the plurality of ray emitters are arranged along the circumference of the first plane, and the first plane is perpendicular to the first direction.

[0013] In the technical solution, the surface density of the pole piece is detected by the coating surface density detection device, the surface density of each active material layer on the pole piece can be detected at the same time, the detection accuracy is improved, and the product qualification rate is improved.

[0014] In some embodiments, the plurality of ray emitters are arranged along the circumference of the first plane, and the first plane is perpendicular to the first direction.

[0015] In the technical scheme, the multiple ray emitters are arranged on the same circle, which facilitates the overlapping of the light spots of the rays emitted by the multiple ray emitters on the pole piece, and is beneficial to improving the assembly efficiency of the coating surface density detection device, thereby saving detection time and improving detection efficiency.

[0016] In some embodiments, the multiple ray emitters are uniformly arranged on the circle.

[0017] In the technical scheme, the multiple ray emitters are uniformly arranged on the circle, which facilitates the overlapping of the light spots of the rays emitted by the multiple ray emitters on the pole piece, and is beneficial to improving the assembly efficiency of the coating surface density detection device, thereby saving detection time and improving detection efficiency.

[0018] In some embodiments, the corresponding ray emitters and ray receivers form emitter orthographic projections and receiver orthographic projections, respectively, in the radial direction of the first plane, and the interval distance between the emitter orthographic projections and the receiver orthographic projections is greater than 20 mm and less than 360 mm.

[0019] In the technical scheme, the corresponding ray emitters and ray receivers form emitter orthographic projections and receiver orthographic projections, respectively, in the radial direction of the first plane, and the interval distance between the emitter orthographic projections and the receiver orthographic projections is greater than 20 mm and less than 360 mm, which is beneficial to the overlapping of the light spots of the rays emitted by the multiple ray emitters on the pole piece, and is beneficial to increasing the overlapping area of the multiple light spots formed by the rays emitted by the multiple ray emitters on the pole piece, and is beneficial to improving the overlapping degree of the multiple light spots formed by the rays emitted by the multiple ray emitters on the pole piece, thereby further improving the surface density detection precision of different coating layers at the same position of the pole piece, and further improving the qualified rate of the pole piece.

[0020] In some embodiments, the multiple ray receivers form multiple receiver orthographic projections along the second direction, the multiple receiver orthographic projections are sequentially spaced apart along the third direction, and the interval distance between the center points of any two adjacent receiver orthographic projections along the third direction is greater than 20 mm and less than 180 mm, and the first direction, the second direction and the third direction are perpendicular to each other.

[0021] In the technical solution, the multiple ray receivers form multiple receiver orthographic projections along the second direction, the multiple receiver orthographic projections are sequentially spaced apart along the third direction, and the interval distance between the center points of any two adjacent receiver orthographic projections along the third direction is greater than 20 mm and less than 180 mm, in the case that the multiple ray emitters are correspondingly arranged with the multiple ray receivers, the rays emitted by the multiple ray emitters can be superimposed on the pole piece, the superimposed area of the multiple light spots formed by the rays emitted by the multiple ray emitters on the pole piece can be increased, the superposition degree of the multiple light spots formed by the rays emitted by the multiple ray emitters on the pole piece can be improved, and the interference risk of adjacent ray receivers can be reduced.

[0022] In some embodiments, the at least one ray emitter emits beta rays; and / or the at least one ray emitter emits X-rays.

[0023] In the technical solution, the at least one ray emitter emits beta rays, and / or the at least one ray emitter emits X-rays, the corresponding ray emitters emitting beta rays and X-rays can be selected according to different coating materials and foils, the face density of each active material layer on the pole piece can be detected at the same time, the detection accuracy can be improved, and the product qualification rate can be further improved.

[0024] In some embodiments, the coating face density detection device further comprises a moving module, the ray emitting mechanism and the ray receiving mechanism are fixed to the moving module, and the moving module is used to drive the ray emitting mechanism and the ray receiving mechanism to move synchronously along the width direction of the pole piece.

[0025] In the technical solution, the moving module drives the ray emitting mechanism and the ray receiving mechanism to move synchronously along the width direction of the pole piece, the coating face density detection device can detect the face density at different positions of the pole piece, the detection accuracy can be improved, and the product qualification rate can be further improved.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0028] Figure 1 is a side view of a coating face density detection device according to an embodiment of the present application, which is provided with three ray emitters;

[0029] Figure 2is a top view of arrangement of three ray emitters according to the embodiment of the utility model;

[0030] Figure 3 is a side view of coating area density detection device provided with two ray emitters according to the embodiment of the utility model;

[0031] Figure 4 is a top view of arrangement of two ray emitters according to the embodiment of the utility model.

[0032] Reference signs:

[0033] Coating area density detection device 100;

[0034] Ray emitting mechanism 10;Ray emitter 11;Ray 12;First ray emitter 13;Second ray emitter 14;Third ray emitter 15;

[0035] Ray receiving mechanism 20;Ray receiver 21;First ray receiver 22;Second ray receiver 23;Third ray receiver 24;

[0036] Moving module 30;First frame body 31;Second frame body 32;

[0037] Circular ring structure 40;

[0038] Pole piece 200. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] Unless otherwise defined, all the technical and scientific terms used in the present application have the same meanings as those commonly understood by the person skilled in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, not to describe a specific order or primary and secondary relationship.

[0041] Reference within this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0042] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0043] The term "and / or" in this application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0044] In the embodiments of the application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0045] If not specifically stated, all embodiments and optional embodiments of the application can be combined with each other to form new technical solutions.

[0046] "Multiple" appearing in this application means two or more (including two).

[0047] The electrode plate mentioned in the embodiments of the application is applied in the battery monomer, and the battery device can include a plurality of battery monomers connected in series, parallel or mixed connection through the busbar component.

[0048] In some embodiments, the battery device includes a box body and a plurality of battery monomers, and the plurality of battery monomers are accommodated in the box body.

[0049] As an example, the box can include a first box and a second box. The first box and the second box are buckled so that an installation cavity is formed inside the box, and the installation cavity can accommodate a plurality of battery monomers, i.e., the plurality of battery monomers are installed in the installation cavity. Here, the closure means covering or closing, which can be sealed or unsealed. The first box can be one of the upper box and the lower box, and the second box can be the other of the upper box and the lower box.

[0050] In the embodiments of the present application, the battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging.

[0051] The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0052] The battery monomer can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of the present application are not limited thereto. The battery monomer is generally divided into three types according to the packaging method: cylindrical battery monomers, square battery monomers, and soft pack battery monomers, and the embodiments of the present application are not limited thereto.

[0053] The battery monomer includes a shell, an electrode assembly, and an electrolyte. The shell is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of an anode tab, a cathode tab, and a separator. The battery monomer mainly relies on the movement of metal ions between the anode tab and the cathode tab to work. The anode tab includes an anode current collector and an anode active material layer, and the anode active material layer is coated on the surface of the anode current collector. The anode current collector without the anode active material layer protrudes from the anode current collector with the anode active material layer, and the anode current collector without the anode active material layer serves as an anode tab. Taking a lithium ion battery as an example, the material of the anode current collector can be aluminum, and the anode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The cathode tab includes a cathode current collector and a cathode active material layer, and the cathode active material layer is coated on the surface of the cathode current collector. The cathode current collector without the cathode active material layer protrudes from the cathode current collector with the cathode active material layer, and the cathode current collector without the cathode active material layer serves as a cathode tab. The material of the cathode current collector can be copper, and the cathode active material can be carbon or silicon, etc. In order to ensure that no fuse occurs when passing a large current, the number of anode tabs is multiple and stacked together, and the number of cathode tabs is multiple and stacked together.

[0054] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0055] In recent years, vehicles have developed rapidly. Taking new energy vehicles as an example, a battery device as a core component of a vehicle plays an irreplaceable important role.

[0056] In the related art, the surface density of the pole piece is detected by using a coating surface density detection device. The coating surface density detection device includes a ray emitter and a ray receiver. The ray emitter and the ray receiver are located on opposite sides of the pole piece. The ray emitter emits rays to the pole piece. After the rays pass through the pole piece, the rays are detected by the ray receiver, so that the coating surface density of the pole piece is detected. However, in the case of coating multiple active material layers on the pole piece, the materials contained in each layer of the active material layer may be different. This structural change not only improves the performance of the battery, but also puts almost strict high-precision requirements on the weight consistency (surface density) of each layer of active material coated in the production process. Small deviations in each layer of coating may be amplified, ultimately affecting the overall capacity, uniformity and safety of the battery. However, the existing coating surface density detection device can only detect the surface density of a layer of active material, and cannot simultaneously detect the surface density of multiple layers of active material, thereby affecting the detection accuracy and reducing the product pass rate.

[0057] Based on the above considerations, in order to solve the problem of detection accuracy of the surface density of the pole piece, after deep research, a coating surface density detection device is designed, which comprises a ray emitting mechanism and a ray receiving mechanism. The ray emitting mechanism and the ray receiving mechanism are opposite and spaced apart along a first direction. The ray emitting mechanism includes a plurality of ray emitters, and the ray receiving mechanism includes a plurality of ray receivers. The plurality of ray emitters and the plurality of ray receivers are one-to-one corresponding. The ray emitters are used to emit rays that can penetrate the pole piece to the pole piece. The ray receivers are used to receive the rays emitted by the corresponding ray emitters and penetrating the pole piece. The rays emitted by the plurality of ray emitters form the same spot area on the pole piece. The plurality of ray emitters are used to emit rays to the same position of the pole piece, so that the plurality of spots formed by the plurality of ray emitters on the pole piece coincide. The working voltages of at least two ray emitters are different. The coating surface density detection device can simultaneously detect the surface density of each layer of active material on the pole piece, thereby facilitating the improvement of detection accuracy and the improvement of product pass rate.

[0058] Reference will be made to the following Figures 1-4 A coating surface density detection device 100 of a pole piece 200 according to an embodiment of the application is described.

[0059] As Figures 1-4As shown, the coating area density detection device 100 of the pole piece 200 according to the embodiment of the application comprises a ray emitting mechanism 10 and a ray receiving mechanism 20, the ray emitting mechanism 10 and the ray receiving mechanism 20 are opposite and spaced apart along a first direction, the ray emitting mechanism 10 comprises a plurality of ray emitters 11, the ray receiving mechanism 20 comprises a plurality of ray receivers 21, the plurality of ray emitters 11 and the plurality of ray receivers 21 are one-to-one corresponding, and the ray emitter 11 is used to emit a ray 12 capable of penetrating the pole piece 200 to the pole piece 200, and the ray receiver 21 is used to receive the ray 12 emitted by the corresponding ray emitter 11 and penetrating the pole piece 200, wherein the rays 12 emitted by the plurality of ray emitters 11 form the same spot area on the pole piece 200, the plurality of ray emitters 11 are used to emit the rays 12 to the same position of the pole piece 200, so that the plurality of spots formed by the plurality of ray emitters 11 on the pole piece 200 coincide, and the working voltages of at least two ray emitters 11 are different.

[0060] The coating area density detection device 100 comprises a ray emitting mechanism 10 and a ray receiving mechanism 20, the ray emitting mechanism 10 and the ray receiving mechanism 20 are arranged opposite along a first direction, and the ray emitting mechanism 10 and the ray receiving mechanism 20 are arranged spaced apart along the first direction, as shown in Figure 1 The first direction is the Z direction in Figure 1 , and the application takes the first direction as the up-down direction as an example for description. As an example, the ray emitting mechanism 10 is located above the ray receiving mechanism 20. As another example, the ray emitting mechanism 10 is located below the ray receiving mechanism 20. As shown in Figure 1 , the application takes the ray emitting mechanism 10 located above the ray receiving mechanism 20 as an example for description.

[0061] The coating surface density detection device 100 detects the surface density of the pole piece 200, the pole piece 200 is located between the ray emitting mechanism 10 and the ray receiving mechanism 20, the ray emitting mechanism 10 includes a plurality of ray emitters 11, the ray receiving mechanism 20 includes a plurality of ray receivers 21, the plurality of ray emitters 11 and the plurality of ray receivers 21 are one-to-one correspondence, one ray receiver 21 is used to receive the ray 12 emitted by the corresponding ray emitter 11, the ray emitter 11 emits the ray 12 to the pole piece 200, and forms a light spot on the pole piece 200, and the ray 12 emitted by the ray emitter 11 passes through the pole piece 200 and is received by the corresponding ray receiver 21. The ray emitter 11 can be an X-ray emitter 11, and the ray emitter 11 can also be a β-ray emitter 11. The types of the plurality of ray emitters 11 can be reasonably selected according to the actual use, and the ray emitter 11 can also emit other rays 12 with penetration. The types of the plurality of ray emitters 11 can be the same, and the types of the plurality of ray emitters 11 can be different. It should be noted that one ray emitter 11 and one ray receiver 21 form one detection module.

[0062] The light spots formed by the plurality of ray emitters 11 on the pole piece 200 have the same area, and the light spots formed by the plurality of ray emitters 11 on the pole piece 200 can have the same shape. When the coating surface density detection device 100 detects the surface density of the pole piece 200, the plurality of ray emitters 11 emit rays 12 to the same position of the pole piece 200, so that the plurality of light spots formed by the plurality of ray emitters 11 on the pole piece 200 coincide. For example, the plurality of light spots formed by the plurality of ray emitters 11 on the pole piece 200 completely coincide, or the plurality of light spots formed by the plurality of ray emitters 11 on the pole piece 200 do not completely coincide, and at least two light spots have a non-coincidence area.

[0063] As an example, the ray emitter 11 is three, and the three ray emitters 11 form three light spots on the pole piece 200, the three light spots are a first light spot, a second light spot and a third light spot, the areas of the first light spot, the second light spot and the third light spot are the same, and the shapes of the first light spot, the second light spot and the third light spot are the same, and the first light spot, the second light spot and the third light spot completely coincide.

[0064] As another example, the ray emitter 11 is three, and the three ray emitters 11 form three light spots on the pole piece 200, the three light spots are a first light spot, a second light spot and a third light spot, the areas of the first light spot, the second light spot and the third light spot are the same, and the shapes of the first light spot, the second light spot and the third light spot are the same, the first light spot and the second light spot completely coincide, and part of the third light spot coincides with the first light spot and the second light spot, and another part of the third light spot is staggered with the first light spot and the second light spot.

[0065] As another example, the ray emitters 11 are three, the three ray emitters 11 form three light spots on the pole piece 200, the three light spots are a first light spot, a second light spot and a third light spot, the area of the first light spot, the area of the second light spot and the area of the third light spot are the same, and the shape of the first light spot, the shape of the second light spot and the shape of the third light spot are the same, a part of the first light spot and a part of the second light spot coincide, and a part of the third light spot coincides with the part of the first light spot and the second light spot.

[0066] As another example, the ray emitters 11 are two, the two ray emitters 11 form two light spots on the pole piece 200, the two light spots are a first light spot and a second light spot, the area of the first light spot and the area of the second light spot are the same, and the shape of the first light spot and the shape of the second light spot are the same, a part of the first light spot and a part of the second light spot coincide.

[0067] When the ray emitters 11 are working, different working voltages (i.e. tube voltages) of the ray emitters 11 can emit rays 12 of different wavelengths, and different types of materials have significant differences in the absorption of rays 12 of different wavelengths, so the tube voltage of each ray emitter 11 is determined by the design and selection of different coating layer materials. The working voltages of at least two ray emitters 11 are different, for example, the working voltages of two ray emitters 11 are different, or the working voltages of three ray emitters 11 are different, or the working voltages of multiple ray emitters 11 are different, and the present application takes the working voltages of multiple ray emitters 11 as an example for description, for example, the working voltage of part of the ray emitters 11 is 10KV, and the working voltage of another part of the ray emitters 11 is 25KV. The number of detection modules can be driven according to the number of coating layers of the pole piece 200 and the number of coating materials, and each type of coating material can correspond to at least one detection module, so that the detection module detects the area density of the corresponding coating material layer.

[0068] Specifically, in the case that the coating area density detection device 100 detects the area density of the pole piece 200, the plurality of ray emitters 11 work simultaneously, the plurality of ray emitters 11 emit rays 12 to the same position area of the pole piece 200, the rays 12 emitted by the plurality of ray emitters 11 form the same spot area on the pole piece 200, so that the plurality of spots formed by the plurality of ray emitters 11 on the pole piece 200 coincide, and the working voltages of the plurality of ray emitters 11 are different, so that the plurality of ray emitters 11 emit rays 12 of different wavelengths, the plurality of rays 12 emitted by the plurality of ray emitters 11 are respectively absorbed by the corresponding coating layers and pass through the pole piece 200, the rays 12 emitted by the plurality of ray emitters 11 are respectively received by the corresponding ray receivers 21, and the plurality of detection modules can respectively detect the area densities of different coating layers at the same position of the pole piece 200, which is beneficial to realize accurate measurement of the weight and composition of the pole piece 200, thereby improving the detection accuracy, and further improving the pass rate of the pole piece 200 and the reliability of the battery cell.

[0069] In the above technical solution, the area density of the pole piece 200 is detected by the coating area density detection device 100, so that the area density of each layer of active material layer on the pole piece 200 can be detected simultaneously, thereby improving the detection accuracy and further improving the product pass rate.

[0070] In some examples of the present application, the plurality of ray emitters 11 are used to emit rays 12 to the same position of the pole piece 200 to form a target spot coincidence area, and the coincidence rate of the spot formed by the ray emitter 11 on the pole piece 200 and the target spot coincidence area is greater than or equal to 0.9 and less than or equal to 1, wherein the coincidence rate is the ratio of the coinciding area of the spot and the target spot coincidence area to the area of the target spot coincidence area.

[0071] The plurality of ray emitters 11 are used to emit rays 12 to the same position of the pole piece 200 to form a target spot coincidence area, and the target spot coincidence area is a region where the plurality of spots formed by the plurality of rays 12 emitted by the plurality of ray emitters 11 completely coincide. The coincidence rate of the spot formed by the ray 12 emitted by any one of the ray emitters 11 on the pole piece 200 and the target spot coincidence area is Q, which satisfies the relationship: 0.9≤Q≤1, and the coincidence rate can be 0.9, 0.91, 0.93, 0.94, 0.97, 0.98, 0.99, 1, etc. The coincidence rate is the ratio of the coinciding area of the spot formed by the ray 12 emitted by any one of the ray emitters 11 on the pole piece 200 and the target spot coincidence area to the area of the target spot coincidence area, in other words, the coinciding area of the spot formed by the ray 12 emitted by any one of the ray emitters 11 on the pole piece 200 and the target spot coincidence area is M, the area of the target spot coincidence area is N, and Q=M / N.

[0072] In the technical solution, the coincidence rate of the light spot formed on the pole piece 200 by the ray emitter 11 and the target light spot coincident area is greater than or equal to 0.9 and less than or equal to 1, which can make the light spots formed on the pole piece 200 by the rays 12 emitted by the plurality of ray emitters 11 have sufficient coincident area, thereby improving the coincidence degree of the light spots formed on the pole piece 200 by the rays 12 emitted by the plurality of ray emitters 11, improving the surface density detection accuracy of different coating layers at the same position of the pole piece 200, and further improving the yield of the pole piece 200.

[0073] In some examples of the present application, the plurality of ray emitters 11 are arranged in sequence along the circumference of the first plane, and the first plane is perpendicular to the first direction.

[0074] In the case of the first direction being the up-down direction, the first plane is a horizontal plane. The plurality of ray emitters 11 are arranged in sequence along the circumference of the first plane, in other words, the plurality of ray emitters 11 are arranged around the first direction along the first direction. As an example, as shown in Figure 2 , the ray emitters 11 are three, and the three ray emitters 11 are arranged in sequence along the circumference of the first direction. As another example, as shown in Figure 4 , the ray emitters 11 are two, and the two ray emitters 11 are arranged opposite and spaced apart.

[0075] In the technical solution, the plurality of ray emitters 11 are arranged in sequence along the circumference of the first plane, which can reduce the risk of mutual interference of the plurality of ray emitters 11, improve the working reliability of the coating surface density detection device 100, and achieve the light spot coincidence effect of the rays 12 emitted by the plurality of ray emitters 11 on the pole piece 200.

[0076] In some examples of the present application, along the circumference of the first plane, the included angle formed by the rays 12 emitted by any two adjacent ray emitters 11 in the radial direction of the first plane is greater than or equal to 20° and less than 70°.

[0077] In the case of the first direction being the up-down direction, the first plane is a horizontal plane. The plurality of ray emitters 11 are arranged in sequence along the circumference of the first plane, in other words, the plurality of ray emitters 11 are arranged around the first direction along the first direction. As an example, as shown in

[0078] Exemplarily, as shown in Figure 1 and Figure 2 , the ray emitters 11 are three, and the three ray emitters 11 are respectively a first ray emitter 13, a second ray emitter 14, and a third ray emitter 15, as shown in Figure 2The first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 are arranged in sequence and spaced apart along the circumference of the first plane, and the orthographic projection of the first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 along the direction perpendicular to the paper plane is as shown in Figure 1 As shown in the drawings, the orthographic projection of the second ray emitter 14 is located between the first ray emitter 13 and the third ray emitter 15, the included angle formed by the rays 12 emitted by the first ray emitter 13 and the rays 12 emitted by the second ray emitter 14 along the direction perpendicular to the paper plane is greater than or equal to 20° and less than 70°, and the included angle formed by the rays 12 emitted by the third ray emitter 15 and the rays 12 emitted by the second ray emitter 14 along the direction perpendicular to the paper plane is greater than or equal to 20° and less than 70°.

[0079] As shown in the drawings, Figure 3 and Figure 4 The ray emitter 11 is two, and the two ray emitters 11 are respectively the first ray emitter 13 and the second ray emitter 14, as shown in the drawings, Figure 4 The first ray emitter 13 and the second ray emitter 14 are arranged opposite and spaced apart along the circumference of the first plane, and the orthographic projection of the first ray emitter 13 and the second ray emitter 14 along the direction perpendicular to the paper plane is as shown in the drawings, Figure 3 The included angle formed by the rays 12 emitted by the first ray emitter 13 and the rays 12 emitted by the second ray emitter 14 along the direction perpendicular to the paper plane is greater than or equal to 20° and less than 70°.

[0080] In the above technical solution, along the circumference of the first plane, by setting the included angle formed by the rays 12 emitted by any two adjacent ray emitters 11 in the radial direction of the first plane to be greater than or equal to 20° and less than 70°, it is beneficial to realize the coincidence of the light spots of the rays 12 emitted by the multiple ray emitters 11 on the pole piece 200, beneficial to increase the overlapping area of the multiple light spots formed by the rays 12 emitted by the multiple ray emitters 11 on the pole piece 200, more beneficial to improve the coincidence degree of the multiple light spots formed by the rays 12 emitted by the multiple ray emitters 11 on the pole piece 200, further improve the surface density detection precision of different coating layers at the same position of the pole piece 200, and further more beneficial to improve the qualified rate of the pole piece 200.

[0081] In some examples of the present application, the multiple ray emitters 11 are located on the same circle.

[0082] As an example, as shown in the drawings, Figure 2As shown, the coating surface density detection device 100 can include a circular ring structure 40, the ray emitter 11 is three, the three ray emitters 11 are respectively a first ray emitter 13, a second ray emitter 14 and a third ray emitter 15, and the first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 are all fixed on the circular ring structure 40. As an example, as shown in FIG. 1, the three ray emitters 11 are arranged on the same circle, and the first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 are arranged on the same circle. Figure 4 As shown, the ray emitter 11 is two, the two ray emitters 11 are respectively a first ray emitter 13 and a second ray emitter 14, the first ray emitter 13 and the second ray emitter 14 are located on the same circle, and the first ray emitter 13 and the second ray emitter 14 are located on the opposite sides of the center of the circle.

[0083] In the above technical solution, by arranging the plurality of ray emitters 11 on the same circle, the light spots of the rays 12 emitted by the plurality of ray emitters 11 on the pole piece 200 are overlapped, which is beneficial to improve the assembly efficiency of the coating surface density detection device 100, thereby saving the detection time, and further improving the detection efficiency, and more beneficial to increase the overlapping area of the plurality of light spots formed by the rays 12 emitted by the plurality of ray emitters 11 on the pole piece 200, and more beneficial to improve the overlapping degree of the plurality of light spots formed by the rays 12 emitted by the plurality of ray emitters 11 on the pole piece 200.

[0084] In some examples of the present application, the plurality of ray emitters 11 are uniformly arranged on the circle.

[0085] As an example, as shown in FIG. 1, the three ray emitters 11 are arranged on the same circle, and the first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 are arranged on the same circle. Figure 2 As shown, the ray emitter 11 is three, the three ray emitters 11 are respectively a first ray emitter 13, a second ray emitter 14 and a third ray emitter 15, and the first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 are all fixed on the circular ring structure 40. As an example, as shown in FIG. 1, the three ray emitters 11 are arranged on the same circle, and the first ray emitter 13, the second ray emitter 14 and the third ray emitter 15 are arranged on the same circle. Figure 4 As shown, the ray emitter 11 is two, the two ray emitters 11 are respectively a first ray emitter 13 and a second ray emitter 14, the first ray emitter 13 and the second ray emitter 14 are located on the same circle, and the first ray emitter 13 and the second ray emitter 14 are located on the opposite sides of the center of the circle.

[0086] In the technical solution, the multiple ray emitters 11 are evenly arranged on the circle, which is more convenient for the light spots of the rays 12 emitted by the multiple ray emitters 11 to coincide on the pole piece 200, and is more conducive to improving the assembly efficiency of the coating surface density detection device 100, thereby being more conducive to saving detection time and further improving detection efficiency. In addition, it is more conducive to increasing the overlapping area of the multiple light spots formed by the rays 12 emitted by the multiple ray emitters 11 on the pole piece 200, and is more conducive to improving the coincidence degree of the multiple light spots formed by the rays 12 emitted by the multiple ray emitters 11 on the pole piece 200.

[0087] In some examples of the present application, the corresponding ray emitters 11 and ray receivers 21 form emitter orthographic projections and receiver orthographic projections, respectively, in the radial direction of the first plane. The spacing distance between the emitter orthographic projections and the receiver orthographic projections is greater than 20 mm and less than 360 mm.

[0088] In some examples of the present application, the corresponding ray emitters 11 and ray receivers 21 form emitter orthographic projections and receiver orthographic projections, respectively, in the radial direction of the first plane. The spacing distance between the emitter orthographic projections and the receiver orthographic projections is greater than 20 mm and less than 360 mm.

[0089] For example, as shown in Figure 1 and Figure 2 , the ray emitters 11 and the ray receivers 21 are three, the three ray emitters 11 are a first ray emitter 13, a second ray emitter 14, and a third ray emitter 15, and the three ray receivers 21 are a first ray receiver 22, a second ray receiver 23, and a third ray receiver 24. The first ray emitter 13, the second ray emitter 14, and the third ray emitter 15 are arranged in sequence and spaced apart along the circumference of the first plane. The orthographic projection of the first ray emitter 13, the second ray emitter 14, and the third ray emitter 15 along the direction perpendicular to the paper surface is shown in Figure 1 , the orthographic projection of the second ray emitter 14 is located between the orthographic projections of the first ray emitter 13 and the third ray emitter 15, the first ray emitter 13 is located to the left of the second ray emitter 14, and the third ray emitter 15 is located to the right of the second ray emitter 14. The orthographic projection of the first ray receiver 22, the second ray receiver 23, and the third ray receiver 24 along the direction perpendicular to the paper surface is shown in Figure 1As shown, the orthographic projection of the second radiation receiver 23 is located between the first radiation receiver 22 and the third radiation receiver 24. The first radiation receiver 22 is located to the right of the second radiation receiver 23, and the third radiation receiver 24 is located to the left of the second radiation receiver 23. The first radiation emitter 13 and the first radiation receiver 22 are opposite to each other and spaced apart. The second radiation emitter 14 and the second radiation receiver 23 are opposite to each other and spaced apart. The third radiation emitter 15 and the third radiation receiver 24 are opposite to each other and spaced apart. The orthographic projection of the radiation emitter 11 has a first end face facing the orthographic projection of the corresponding radiation receiver 21. The orthographic projection of the radiation receiver 21 has a second end face facing the orthographic projection of the corresponding radiation emitter 11. The distance between the first end face and the second end face is greater than 20 mm and less than 360 mm.

[0090] In the above technical solution, by setting the interval between the orthographic projection of the emitter and the orthographic projection of the corresponding X-ray emitter 11 and X-ray receiver 21 to be greater than 20mm and less than 360mm, it is more conducive to achieving the overlap of the light spots of the X-rays 12 emitted by multiple X-ray emitters 11 on the electrode 200, more conducive to increasing the overlap area of ​​the multiple light spots formed by the X-rays 12 emitted by multiple X-ray emitters 11 on the electrode 200, more conducive to improving the overlap degree of the multiple light spots formed by the X-rays 12 emitted by multiple X-ray emitters 11 on the electrode 200, further improving the detection accuracy of the surface density of different coating layers at the same position of the electrode 200, and thus more conducive to improving the pass rate of the electrode 200.

[0091] In some examples of this application, multiple ray receivers 21 form multiple receiver orthographic projections along a second direction, and the multiple receiver orthographic projections are spaced apart sequentially along a third direction. The distance between the center points of any two adjacent receiver orthographic projections along the third direction is greater than 20 mm and less than 180 mm, and the first direction, the second direction and the third direction are perpendicular to each other.

[0092] Among them, such as Figure 1 and Figure 3 As shown, the second direction can be Figure 1 and Figure 3 The X direction, or the second direction, can be... Figure 1 and Figure 3 The direction perpendicular to the paper, in this application, is the second direction. Figure 1 and Figure 3 Taking the direction perpendicular to the paper as an example, in this case, the second direction is... Figure 2 and Figure 4 In the Y direction, the third direction is Figure 1 and Figure 3 The X direction in the equation.

[0093] As an example, such as Figure 1 andFigure 2 As shown, the ray transmitter 11 and the ray receiver 21 are both three, the three ray transmitters 11 are respectively a first ray transmitter 13, a second ray transmitter 14 and a third ray transmitter 15, and the three ray receivers 21 are respectively a first ray receiver 22, a second ray receiver 23 and a third ray receiver 24, the first ray transmitter 13, the second ray transmitter 14 and the third ray transmitter 15 are arranged in sequence and spaced apart along the circumference of the first plane, and the orthographic projection of the first ray transmitter 13, the second ray transmitter 14 and the third ray transmitter 15 along the second direction is as shown in Figure 1 As shown, the orthographic projection of the second ray transmitter 14 is located between the first ray transmitter 13 and the third ray transmitter 15, the first ray transmitter 13 is located on the left side of the second ray transmitter 14, and the third ray transmitter 15 is located on the right side of the second ray transmitter 14, and the orthographic projection of the first ray receiver 22, the second ray receiver 23 and the third ray receiver 24 along the second direction is as shown in Figure 1 As shown, the orthographic projection of the second ray receiver 23 is located between the first ray receiver 22 and the third ray receiver 24, the first ray receiver 22 is located on the right side of the second ray receiver 23, and the third ray receiver 24 is located on the left side of the second ray receiver 23, the first ray transmitter 13 and the first ray receiver 22 are opposite and spaced apart, the second ray transmitter 14 and the second ray receiver 23 are opposite and spaced apart, and the third ray transmitter 15 and the third ray receiver 24 are opposite and spaced apart, as shown in Figure 1 As shown, along the third direction, the orthographic projections of the plurality of receivers are sequentially spaced apart along the third direction, the interval distance between the center point of the first ray receiver 22 along the third direction and the center point of the second ray receiver 23 along the third direction is greater than 20mm and less than 180mm, the interval distance between the center point of the first ray receiver 22 along the third direction and the center point of the second ray receiver 23 along the third direction can be 21mm, 20mm, 50mm, 90mm, 100mm, 150mm, 160mm, 179mm and the like, the interval distance between the center point of the second ray receiver 23 along the third direction and the center point of the third ray receiver 24 along the third direction is greater than 20mm and less than 180mm, and the interval distance between the center point of the third ray receiver 24 along the third direction and the center point of the second ray receiver 23 along the third direction can be 21mm, 20mm, 50mm, 90mm, 100mm, 150mm, 160mm, 179mm and the like.

[0094] As another example, as shown in Figure 3 and Figure 4As shown, the ray transmitter 11 and the ray receiver 21 are both two, the two ray transmitters 11 are respectively a first ray transmitter 13 and a second ray transmitter 14, the two ray receivers 21 are respectively a first ray receiver 22 and a second ray receiver 23, the first ray transmitter 13 and the second ray transmitter 14 are opposite and spaced apart along the third direction, the orthographic projection of the first ray transmitter 13 and the second ray transmitter 14 along the second direction is as shown in the figure Figure 3 As shown, the orthographic projection of the second ray transmitter 14 and the orthographic projection of the first ray transmitter 13 are spaced apart along the third direction, the orthographic projection of the first ray receiver 22 and the orthographic projection of the second ray receiver 23 along the second direction are as shown in the figure Figure 1 As shown, the orthographic projection of the second ray receiver 23 and the orthographic projection of the first ray receiver 22 are spaced apart along the third direction, as shown in the figure Figure 3 As shown, along the third direction, the orthographic projections of the two receivers are sequentially spaced apart along the third direction, the interval distance between the center point of the first ray receiver 22 along the third direction and the center point of the second ray receiver 23 along the third direction is greater than 20mm and less than 180mm, and the interval distance between the center point of the first ray receiver 22 along the third direction and the center point of the second ray receiver 23 along the third direction can be 21mm, 20mm, 50mm, 90mm, 100mm, 150mm, 160mm, 179mm and the like.

[0095] In the above technical solution, a plurality of receiver orthographic projections are formed along the second direction by the plurality of ray receivers 21, the plurality of receiver orthographic projections are sequentially spaced apart along the third direction, and the interval distance between the center points of any two adjacent receiver orthographic projections along the third direction is greater than 20mm and less than 180mm, in the case that the plurality of ray transmitters 11 and the plurality of ray receivers 21 are correspondingly arranged, it is beneficial to realize the coincidence of the light spots of the rays 12 emitted by the plurality of ray transmitters 11 on the pole piece 200, and it is more beneficial to increase the coincidence area of the plurality of light spots formed by the rays 12 emitted by the plurality of ray transmitters 11 on the pole piece 200, and it is more beneficial to improve the coincidence degree of the plurality of light spots formed by the rays 12 emitted by the plurality of ray transmitters 11 on the pole piece 200, and the risk of interference of adjacent ray receivers 21 is reduced.

[0096] In some examples of the present application, the at least one ray transmitter 11 emits β rays; and / or the at least one ray transmitter 11 emits X rays.

[0097] Wherein, as an example, the at least one ray emitter 11 emits beta rays, and the ray emitter 11 emitting beta rays is a beta ray emitter 11. As another example, the at least one ray emitter 11 emits X-rays, and the ray emitter 11 emitting X-rays is an X-ray emitter 11. As another example, the at least one ray emitter 11 emits beta rays, and the at least one ray emitter 11 emits X-rays. It should be noted that different types of ray emitters 11 are selected based on the absorption characteristics of X-rays and beta rays of the coating material and the foil.

[0098] In the above technical solution, by emitting beta rays by the at least one ray emitter 11, and / or emitting X-rays by the at least one ray emitter 11, the corresponding ray emitter 11 can be selected to emit beta rays and X-rays according to different coating materials and foils, which can meet the detection of the surface density of each active material layer on the pole piece 200 at the same time, thereby more conducive to improving the detection accuracy, and further more conducive to improving the product qualification rate.

[0099] In some examples of the present application, the heights of the plurality of ray emitters 11 are the same, and the linear distance between the center points of any two adjacent ray emitters 11 along the circumference of the first plane is greater than 100 mm. The linear distance between the center points of any two adjacent ray emitters 11 can be 101 mm, 110 mm, 120 mm, etc. The upper limit value of the linear distance between the center points of any two adjacent ray emitters 11 can be reasonably selected according to actual conditions. By making the linear distance between the center points of any two adjacent ray emitters 11 greater than 100 mm, the risk of interference of the plurality of ray emitters 11 is reduced, and the risk of interference of the plurality of ray receivers 21 is reduced when the plurality of ray receivers 21 are respectively arranged corresponding to the plurality of ray emitters 11.

[0100] In some examples of the present application, the coating surface density detection device 100 further comprises a moving module 30, and the ray emitting mechanism 10 and the ray receiving mechanism 20 are both fixed to the moving module 30. The moving module 30 is used to drive the ray emitting mechanism 10 and the ray receiving mechanism 20 to move synchronously along the width direction of the pole piece 200.

[0101] Wherein, as an example, Figure 1 and Figure 3As shown, the coating area density detection device 100 can further include a moving module 30. The moving module 30 can be a moving frame. The moving frame can include a first frame body 31 and a second frame body 32. The first frame body 31 and the second frame body 32 are opposite and spaced apart along a first direction. The ray emitting mechanism 10 is fixed to the first frame body 31, and the ray receiving mechanism 20 is fixed to the second frame body 32. The ray emitting mechanism 10 and the ray receiving mechanism 20 are detachably mounted to the moving module 30. The moving module 30 can reciprocate along the width direction of the pole piece 200. The moving module 30 drives the ray emitting mechanism 10 and the ray receiving mechanism 20 to move synchronously along the width direction of the pole piece 200 during movement, so that the coating area density detection device 100 detects the area density at different positions of the pole piece 200. The coating area density detection device 100 can further include a driving module. The driving module can be a linear motor or a telescopic pneumatic cylinder. The driving module is connected with the moving module 30 to drive the moving module 30 to move along the width direction of the pole piece 200.

[0102] In the above technical solution, the moving module 30 drives the ray emitting mechanism 10 and the ray receiving mechanism 20 to move synchronously along the width direction of the pole piece 200, so that the coating area density detection device 100 detects the area density at different positions of the pole piece 200, thereby more facilitating to improve the detection accuracy and further improve the product qualification rate.

[0103] According to some embodiments of the present application, as shown in Figure 1 and Figure 2 The present application provides a coating area density detection device 100 of a pole piece 200, which includes a ray emitting mechanism 10 and a ray receiving mechanism 20. The ray emitting mechanism 10 and the ray receiving mechanism 20 are opposite and spaced apart along a first direction. The ray emitting mechanism 10 includes a plurality of ray emitters 11, and the ray receiving mechanism 20 includes a plurality of ray receivers 21. The plurality of ray emitters 11 and the plurality of ray receivers 21 are arranged one by one in correspondence. The ray emitters 11 are configured to emit rays 12 that can penetrate the pole piece 200 to the pole piece 200. The ray receivers 21 are configured to receive the rays 12 emitted by the corresponding ray emitters 11 and penetrating the pole piece 200. The spot areas and the spot shapes formed by the rays 12 emitted by the plurality of ray emitters 11 on the pole piece 200 are the same. The plurality of ray emitters 11 are configured to emit rays 12 to the same position of the pole piece 200, so that the plurality of spots formed by the plurality of ray emitters 11 on the pole piece 200 coincide. The working voltages of at least two ray emitters 11 are different. The plurality of ray emitters 11 are arranged in sequence and spaced apart along the circumference of a first plane. The plurality of ray receivers 21 are arranged in sequence and spaced apart along the circumference of the first plane.

[0104] In some examples of the present application, as shown in Figure 1 and Figure 2As shown, there are three ray emitters 11 and three ray receivers 21. The three ray emitters 11 are located on the same circle, and the three ray receivers 21 are located on the same circle. The rays 12 emitted by each ray emitter 11 are at different angles. The operating voltages of the three ray emitters 11 are 10KV, 15KV and 25KV respectively. Along the circumference of the first plane, the included angle θ formed by the rays 12 emitted by any two adjacent ray emitters 11 in the radial direction of the first plane is 30°. The distance between the orthographic projections of the emitters and receivers formed by the ray emitters 11 and the ray receivers 21 in the radial direction of the first plane is 173.2mm. The multiple ray receivers 21 form multiple orthographic projections along the second direction. The multiple orthographic projections of the receivers are spaced apart sequentially along the third direction. The distance between the center points of any two adjacent orthographic projections of the receivers along the third direction is 50mm.

[0105] In some examples of this application, such as Figure 1 and Figure 2 As shown, there are three ray emitters 11 and three ray receivers 21. The three ray emitters 11 are located on the same circle, and the three ray receivers 21 are located on the same circle. The rays 12 emitted by each ray emitter 11 are at different angles. The operating voltages of the three ray emitters 11 are 10KV, 15KV and 25KV respectively. Along the circumference of the first plane, the included angle θ formed by the rays 12 emitted by any two adjacent ray emitters 11 in the radial direction of the first plane is 60°. The distance between the orthographic projections of the emitters and receivers formed by the ray emitters 11 and the ray receivers 21 in the radial direction of the first plane is 100mm. The multiple ray receivers 21 form multiple orthographic projections along the second direction. The multiple orthographic projections of the receivers are spaced apart in sequence along the third direction. The distance between the center points of any two adjacent orthographic projections of the receivers along the third direction is 86.6mm.

[0106] In some examples of this application, such as Figure 3 and Figure 4As shown, the ray transmitter 11 and the ray receiver 21 are both two, two ray transmitters 11 are located on the same circle and are located on the opposite sides of the center, two ray receivers 21 are located on the same circle and are located on the opposite sides of the center, the angle between the rays 12 emitted by each ray transmitter 11 is different, the working voltage of the two ray transmitters 11 is 10KV and 25KV respectively, along the circumference of the first plane, the included angle θ formed by the rays 12 emitted by the two ray transmitters 11 in the radial direction of the first plane is 60°, the interval distance between the transmitter orthographic projection and the receiver orthographic projection formed by the corresponding ray transmitter 11 and the ray receiver 21 in the radial direction of the first plane is 173.2mm, the two ray receivers 21 form a plurality of receiver orthographic projections along the second direction, the two receiver orthographic projections are sequentially spaced apart along the third direction, and the interval distance between the center points of any two adjacent receiver orthographic projections along the third direction is 100mm.

[0107] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0108] The other constitutions and working principles of the ray transmitter 11 and the ray receiver 21 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0109] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A coated-face density detection device for an electrode tab, characterized by, The application relates to a coating area density detection device. The application relates to a coating area density detection device.

2. The coated-face density detecting apparatus for a pole piece according to claim 1, wherein The application relates to a coating area density detection device.

3. The coated-face density detecting apparatus for a pole piece according to claim 1, wherein The application relates to a coating area density detection device.

4. The coated-face density detecting apparatus for a pole piece according to claim 3, wherein The application relates to a coating area density detection device.

5. The coated-face density detecting apparatus for a pole piece according to claim 3, wherein The application relates to a coating area density detection device.

6. The coated-face density detecting apparatus for a pole piece according to claim 5, wherein The application relates to a coating area density detection device.

7. The coated-face density detecting apparatus for a pole piece according to claim 3, wherein The application relates to a coating area density detection device.

8. The coated-face density detecting apparatus for a pole piece according to claim 1, wherein The application relates to a coating area density detection device.

9. The coated-face density detecting apparatus for a pole piece according to claim 1, wherein The application relates to a coating area density detection device. The application relates to a coating area density detection device.

10. The coated-face density detection apparatus of any one of claims 1-9, wherein, The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. The application relates to a coating area density detection device. 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