CN217766029U - Insulating film detection equipment - Google Patents

Abstract

The application discloses insulating film check out test set, which comprises a frame, conveyor, pressure adjusting device and electricity parameter tester, conveyor and pressure adjusting device set up in the frame, conveyor includes first roll body and matching structure, first roll body includes first conductive part, matching structure includes the second conductive part, the transport space to the insulating film has between first conductive part and the second conductive part, pressure adjusting device is used for adjusting the pressure that conveyor acts on the insulating film, electricity parameter tester electricity is connected first conductive part and second conductive part. In the embodiment of the application, the electrical parameter tester can determine whether the insulating film has defects or not based on the change of the electrical parameters between the first conductive part and the second conductive part, so that the defect detection efficiency of the insulating film is improved, and the arrangement of the pressure adjusting device is beneficial to more effectively detecting the defects such as open holes, conductive particle inclusion and the like on the insulating film.

Description

Insulating film detection equipment

Technical Field

The application belongs to the technical field of detect, especially relates to an insulating film check out test set.

Background

Currently, insulating films are used in many products. For example, in a battery core of a lithium battery, a diaphragm is used to isolate positive and negative electrode plates; as another example, some battery packs may require a blue film to cover the outer casing. These diaphragm and blue film are usually insulating films.

In the related art, defects of the insulating film are usually detected by manual observation, and the detection efficiency is low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an insulating film detection device, which aims to solve the problem that the detection efficiency of an insulating film is low in the related art.

In a first aspect, an embodiment of the present application provides an insulating film inspection apparatus, including:

a frame;

the conveying device is arranged on the rack and comprises a first roller body and a matching structure, the first roller body comprises a first conductive part, the matching structure comprises a second conductive part, and a conveying space for the insulating film is arranged between the first conductive part and the second conductive part;

the pressure adjusting device is arranged on the rack and used for adjusting the pressure of the conveying device acting on the insulating film;

and the electrical parameter tester is electrically connected with the first conductive part and the second conductive part.

The embodiment of the application provides an insulating film detection equipment, which comprises a rack, a conveying device, a pressure regulating device and an electrical parameter tester, wherein the conveying device and the pressure regulating device are arranged on the rack, the conveying device comprises a first roller body and a matching structure, the first roller body comprises a first conductive part, the matching structure comprises a second conductive part, a conveying space for an insulating film is arranged between the first conductive part and the second conductive part, the pressure regulating device is used for regulating the pressure of the conveying device acting on the insulating film, and the electrical parameter tester is electrically connected with the first conductive part and the second conductive part. In the embodiment of the application, the electrical parameter tester can determine whether the insulating film has defects or not based on the change of the electrical parameters between the first conductive part and the second conductive part, so that the defect detection efficiency of the insulating film is improved, and the arrangement of the pressure adjusting device is beneficial to more effectively detecting the defects such as open holes, conductive particle inclusion and the like on the insulating film.

According to some embodiments of the application, a first end of the pressure adjusting device is fixedly connected to the frame, and a second end of the pressure adjusting device is rotatably connected to the first roller body, wherein the second end of the pressure adjusting device is a pressure output end of the pressure adjusting device.

Because first roll body structure is comparatively simple, is connected pressure adjustment device and first roll body in this embodiment, helps reducing pressure adjustment device's the degree of difficulty that sets up.

According to some embodiments of the present application, the first roller body further includes a first roller main body, the first conductive portion is fixedly connected to a peripheral side of the first roller main body, and a hardness of the first conductive portion is less than a hardness threshold value.

In this embodiment, the first conductive portion has a hardness less than the hardness threshold value and is connected to the peripheral side of the first roller main body so as to be in contact with the insulating film, and the insulating film can be effectively prevented from being cut. In addition, the soft first conductive part can transmit deformation under the action of pressure so as to penetrate through the opening in the insulating film to be in contact with the second conductive part, and the detection effect of the opening defect in the insulating film is improved.

According to some embodiments of the present application, the mating structure is a second roller body rotatably connected to the frame.

In this embodiment, rolling friction is formed between the second roller and the insulating film, which helps to reduce the transport resistance of the insulating film.

According to some embodiments of the present application, the second roller body comprises a second roller main body and a second conductive portion; the second conductive part is fixedly connected to the peripheral side of the second roller main body, and the hardness of the second conductive part is smaller than the hardness threshold value.

In the present embodiment, the hardness of the second conductive portion is less than the hardness threshold, and the second conductive portion is connected to the peripheral side of the second roller main body so as to be in contact with the insulating film, so that the insulating film can be effectively prevented from being cut. In addition, the soft second conductive part can transmit deformation under the action of pressure so as to penetrate through the open hole in the insulating film to be in contact with the first conductive part, and the detection effect on the open hole defect in the insulating film is improved.

According to some embodiments of the present application, the number of the transport devices is plural; the plurality of conveying devices are arranged in sequence in a conveying direction of the insulating film.

In the embodiment, the plurality of conveying devices are arranged, so that the condition of missing detection of the defects on the insulating film can be effectively avoided, and the effectiveness of the defect detection result of the insulating film is improved.

According to some embodiments of the present application, the insulating film detection apparatus further comprises a marking device electrically connected to the electrical parameter tester;

the marking device is used for marking the insulating film under the condition of receiving a preset signal sent by the electrical parameter tester.

According to the embodiment, the marking device is used for marking the insulating film, so that a user can scrap or partially cut the defective insulating film according to the marking, and the utilization rate of the insulating film is improved.

According to some embodiments of the present application, the marking device is provided at a downstream position of the first roller body in a conveying direction of the insulating film.

The embodiment is beneficial to providing double-side position reference for cutting off the defect part of the insulating film through the marking device, and the utilization rate of the insulating film is improved.

According to some embodiments of the present application, an electrical parameter tester includes a power supply and a detection circuit, the first conductive part and the second conductive part are respectively connected to two output terminals of the power supply;

the detection circuit is used for detecting the resistance or the current between the first conductive part and the second conductive part.

In this embodiment, electricity parameter test appearance includes power and detection circuitry, and it can be according to the electricity parameter that detection circuitry gathered, detects whether there is the defect in the insulating film, helps improving the convenient degree that insulating film defect detected.

According to some embodiments of the application, the power supply is a dc power supply.

In this embodiment, the power supply is a dc power supply, which can prevent the power supply current from directly passing through the equivalent capacitor formed by the first conductive part and the second conductive part, thereby improving the reliability of the insulating film detection process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an insulating film inspection apparatus provided in an embodiment of the present application;

FIG. 2 is a plan view of an insulating film inspection apparatus provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of an insulating film inspection apparatus provided in an embodiment of the present application.

The figures show that: 100-frame, 200-conveying device, 210-first roller body, 211-first roller main body, 212-first conductive part, 220-matching structure, 230-second roller body, 231-second roller main body, 232-second conductive part, 300-pressure regulating device, 400-electrical parameter tester, 500-marking device, 600-insulating film.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures above, are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein 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 separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two sets), "plural pieces" refers to two or more (including two pieces).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

Currently, many products are applied to the insulating film.

For example, a battery separator is generally used in a battery such as a lithium battery, a sodium ion battery, or a magnesium ion battery. The battery separator generally acts as an insulating film to separate the battery positive electrode from the battery negative electrode.

For another example, the battery may be packaged with a blue film, which is typically an insulating film.

Of course, the above is some examples of the insulating film, and in practical applications, the insulating film may be applied to other application scenarios.

In some products, there are high demands on the insulation and surface integrity of the insulating film. For example, when the insulating film is a battery separator, if the insulating film has an opening or metal particles are adhered to the insulating film, the battery positive electrode and the battery negative electrode may be in direct electrical contact with each other, which may cause a safety problem.

In the related art, the defects of the insulating film are usually detected by observing the color difference or the brightness of the insulating film by naked eyes, and the detection efficiency and the detection precision are low.

To solve the problems in the related art, embodiments of the present application provide an insulating film inspection apparatus. The insulating film inspection apparatus according to the embodiment of the present application will be described in detail below with reference to the drawings.

As shown in fig. 1 and 2, an insulating film inspection apparatus provided in an embodiment of the present application includes:

a frame 100;

a conveying device 200, wherein the conveying device 200 is disposed on the rack 100, the conveying device 200 includes a first roller 210 and a matching structure 220, the first roller 210 includes a first conductive part 212, the matching structure 220 includes a second conductive part 232, and a conveying space for the insulating film 600 is provided between the first conductive part 212 and the second conductive part 232;

a pressure adjusting device 300, the pressure adjusting device 300 being disposed on the frame 100, the pressure adjusting device 300 being used for adjusting the pressure of the conveying device 200 acting on the insulating film 600;

and an electrical parameter tester 400, wherein the electrical parameter tester 400 is electrically connected with the first conductive part 212 and the second conductive part 232.

The frame 100 may be a structure for providing support to the delivery device 200 and the pressure regulating device 300, which may be based on certain strength and rigidity. In some examples, the frame 100 may be made of a metal material, wood, or other material that can provide a reliable support, and is not limited in this regard.

The conveying apparatus 200 may be used to convey the insulating film 600. Specifically, the conveying device 200 may include a first roller body 210 and a mating structure 220.

The first roller body 210 may be in contact with one side surface of the insulating film 600. In some examples, when the first roller body 210 rotates, the insulating film 600 may be driven to move in a predetermined direction by the surface friction force.

The matching structure 220 may be disposed at the other side surface of the insulating film 600, mainly due to the support of the insulating film 600, so that the insulating film 600 can make contact with the surface of the first roller body 210.

In some examples, the matching structure 220 may also include a roller structure, which may be a fixed roller or a movable roller, and may be in line contact with the insulating film 600 or in curved contact with the insulating film 600 during the transportation of the insulating film 600.

In other examples, the matching structure 220 may be a planar structure, for example, a flat plate fixed on the frame 100 to support the insulating film 600. Alternatively, the matching structure 220 may be a belt driving mechanism, and the insulating film 600 is conveyed by the matching structure 220.

As for the specific connection manner of the first roller 210 and the matching structure 220 with the frame 100, the first roller 210 and the matching structure 220 can be designed according to the requirement under the condition of satisfying the transportation function of the insulation film 600, and are not illustrated here.

In this embodiment, the first roller 210 includes the first conductive part 212, the matching structure 220 includes the second conductive part 232, and a space for transporting the insulating film 600 is provided between the first conductive part 212 and the second conductive part 232.

In some examples, the first roller body 210 may be integrally made of a conductive material, and the first roller body 210 may be integrally formed as the first conductive portion 212.

In other examples, the first conductive portion 212 may be disposed on an outer circumferential surface of the main body of the first roller body 210, the outer circumferential surface may be in contact with one side surface of the insulating film 600, and the conductivity of the main body of the first roller body 210 may not be limited.

The first conductive portion 212 may be a conductive layer sprayed or printed on the main body of the first roller 210. Alternatively, the first conductive layer may be, for example, conductive fiber, conductive plastic or other soft conductive material, and the conductive material may be fixed on the main body of the first roller 210 by bonding, nesting, or the like. Alternatively, the first conductive layer may be a metal material, and is fixed on the main body of the first roller 210 by deposition, welding, or the like.

The second conductive portion 232 is disposed in the same or similar manner as the first conductive portion 212. For example, the matching structure 220 includes a roller body, and the second conductive part 232 may be a soft conductive material fixed on the roller body or a conductive layer sprayed on the roller body. For simplicity, the second conductive portion 232 is not disposed in any way.

The insulating film inspection apparatus includes an electrical parameter tester 400, and the electrical parameter tester 400 may connect the first conductive portion 212 and the second conductive portion 232.

The electrical parameter measuring instrument can be a measuring instrument of electrical parameters such as resistance, current or voltage.

For example, the electrical parameter measuring instrument may comprise a resistance measuring device. When the insulating film 600 is present in the transfer space between the first conductive portion 212 and the second conductive portion 232 and the insulating film 600 has no defect such as a via hole, the resistance between the first conductive portion 212 and the second conductive portion 232 may have a high value. However, when the insulating film 600 has a through hole or the insulating film 600 contains metal particles, the first conductive portion 212 and the second conductive portion 232 are electrically connected to each other, and the resistance therebetween has a low value. Therefore, based on the resistance value measured by the resistance measuring device, it is possible to detect whether the insulating film 600 has defects such as a perforation or metal particle inclusion.

Similarly, for other similar electrical parameter testers 400, the existence of defects in the insulating film 600 can also be determined according to the measured electrical parameter values, and the description thereof is omitted here.

In this embodiment, the insulating film inspection apparatus may further include a pressure adjusting device 300, and the pressure adjusting device 300 is disposed on the frame 100.

In some examples, the pressure adjusting device 300 may be a pneumatic cylinder, a hydraulic cylinder, a linear motor or other displacement adjusting structure, etc., and may be used to adjust the pressure applied by the conveying device 200 on the insulation film 600.

The number of the pressure adjusting devices 300 may be one or more, and each pressure adjusting device 300 may be connected to the frame 100 by welding, fastening, snapping, or other means.

In some examples, the pressure adjusting device 300 is connected to the first roller 210, and the pressure adjusting device 300 can drive the first roller 210 to move relative to the matching structure 220, so as to adjust the gap width of the conveying space and further adjust the pressure applied to the insulating film 600 by the conveying device 200.

Similarly, when the pressure adjusting device 300 is connected to the matching structure 220, the pressure of the conveying device 200 acting on the insulating film 600 can be adjusted by driving the matching structure 220 to move relative to the first roller body 210.

When the number of the pressure adjusting devices 300 is plural, a part of the pressure adjusting devices 300 may be connected to the first roller 210, and a part of the pressure adjusting devices 300 may be connected to the matching structure 220.

By providing the pressure adjusting means 300, on the one hand, the gap height of the conveying space can be adjusted according to the thickness of the insulating film 600. On the other hand, when the opening is present in the insulating film 600, it is facilitated to bring the first conductive portion 212 into contact with the second conductive portion 232 through the opening by pressurization; when conductive particles such as metal are interposed on the insulating film 600, the conductive particles can be caused to pierce the insulating film 600 by pressurization. In other words, the provision of the pressure adjustment device 300 helps to more effectively detect defects such as inclusions of open pores and conductive particles in the insulating film 600.

The insulating film detection apparatus provided by the embodiment of the application includes a rack 100, a conveying device 200, a pressure adjusting device 300 and an electrical parameter tester 400, the conveying device 200 and the pressure adjusting device 300 are disposed on the rack 100, the conveying device 200 includes a first roller 210 and a matching structure 220, the first roller 210 includes a first conductive part 212, the matching structure 220 includes a second conductive part 232, a conveying space for the insulating film 600 is formed between the first conductive part 212 and the second conductive part 232, the pressure adjusting device 300 is used for adjusting the pressure applied to the insulating film 600 by the conveying device 200, and the electrical parameter tester 400 is electrically connected with the first conductive part 212 and the second conductive part 232. In the embodiment of the present application, the electrical parameter tester 400 may determine whether the insulating film 600 has defects based on the variation of the electrical parameter between the first conductive part 212 and the second conductive part 232, so as to improve the defect detection efficiency of the insulating film 600, and the arrangement of the pressure adjustment device 300 is helpful to more effectively detect the defects such as open holes and conductive particles mixed in the insulating film 600.

According to some embodiments of the present application, as shown in fig. 1, a first end of the pressure adjusting device 300 is fixedly connected to the frame 100, and a second end of the pressure adjusting device 300 is rotatably connected to the first roller 210, wherein the second end of the pressure adjusting device is a pressure output end of the pressure adjusting device.

The pressure adjustment device 300 may be a pneumatic cylinder, a hydraulic cylinder, a linear motor, or other displacement adjustment structure, etc.

The first end and the second end of the pressure adjustment device 300 may be two ends capable of relative movement. Taking the pressure regulating device 300 as a pneumatic cylinder as an example, the first end thereof may be the end where the pneumatic cylinder is located, and the second end may be the output end of the piston rod. Other types of pressure regulating devices 300 are not illustrated herein.

The first end of the pressure adjustment device 300 may be fixed to the frame 100 by a fastener connection, a snap connection, or a welding. The second end of the pressure adjusting device 300 may be rotatably connected to the first roller body 210.

In one example, the second end of the pressure adjusting device 300 includes a rotating shaft, and the first roller 210 may be rotatably connected to the rotating shaft. When the first roller 210 rotates with respect to the rotation shaft, the insulating film 600 may be driven to move in the conveying space.

Because the first roller 210 has a simpler structure, the pressure adjusting device 300 is connected with the first roller 210 in this embodiment, which is helpful for reducing the difficulty of setting the pressure adjusting device 300.

In some embodiments, when the first roller 210 serves as a main driving member for the insulation film 600, a motor may be provided at the second end of the frame 100 or the pressure adjustment device 300 to drive the first roller 210 to rotate relative to the rotating shaft.

In other embodiments, the matching structure 220 may be used as a main driving element for the insulating film 600. At this time, the matching structure 220 may include a belt conveying mechanism or a roller body driven by a motor, etc., which are not illustrated herein.

According to some embodiments of the present application, as shown in fig. 3, the first roller body 210 further includes a first roller main body 211, the first conductive portion 212 is fixedly connected to the circumferential side of the first roller main body 211, and the hardness of the first conductive portion 212 is less than the hardness threshold.

The first conductive portion 212 has a hardness less than a hardness threshold and may be considered to be made of a relatively soft material. In some examples, the first conductive portion 212 may be a soft conductive material such as conductive fiber, conductive plastic, or conductive rubber.

As for the material of the first roller main body 211, there may be no particular limitation, and for example, the first roller main body 211 may be a metal, a ceramic, an organic material, or the like.

The first roller main body 211 may have an outer circumferential surface, and the first conductive portion 212 may be fixed to the outer circumferential surface of the first roller main body 211. In some examples, the first conductive portion 212 may be connected by bonding, a nested connection, or other means. In other examples, the first roller main body 211 and the first conductive portion 212 may be integrally connected.

In the present embodiment, the hardness of the first conductive portion 212 is less than the hardness threshold value, and is connected to the peripheral side of the first roller main body 211 so as to be in contact with the insulating film 600, and the insulating film 600 can be effectively prevented from being cut. In addition, the soft first conductive portion 212 can transmit deformation under pressure so as to contact the second conductive portion 232 through the opening in the insulating film 600, thereby improving the detection effect of the opening defect in the insulating film 600.

In some possible embodiments, when the first roller main body 211 is a conductive structure, the electrical parameter tester 400 may be directly electrically connected to the first conductive portion 212, or may be indirectly electrically connected to the first conductive portion 212 through the first roller main body 211.

When the first roller main body 211 is an insulating structure, the electrical parameter tester 400 may be directly electrically connected to the first conductive portion 212. As for the connection manner of the electrical parameter tester 400 and the first conductive part 212, a sliding contact connection or the like may be used.

According to some embodiments of the present application, as shown in fig. 3, the matching structure 220 is a second roller 230, and the second roller 230 is rotatably connected to the frame 100.

In this embodiment, the matching structure 220 may be the same or similar in configuration to the first roller body 210, and specifically, the matching structure 220 may be the second roller body 230.

The first roller body 210 and the second roller body 230 may have a conveying space for the insulating film 600 therebetween, and during the conveying of the insulating film 600, rolling friction is generated between the second roller body 230 and the insulating film 600, which helps to reduce the conveying resistance of the insulating film 600.

In some examples, at least one of the first roller body 210 and the second roller body 230 is a moving roller that can rotate relative to the frame 100. In other examples, the first roller body 210 or the second roller body 230 may be a fixed roller and may be in reliable contact with the insulating film 600.

According to some embodiments of the present application, as shown in fig. 3, the second roller body 230 includes a second roller main body 231 and a second conductive portion 232; the second conductive portion 232 is fixedly connected to the peripheral side of the second roller main body 231, and the hardness of the second conductive portion 232 is less than the hardness threshold.

The hardness of the second conductive portion 232 is less than the hardness threshold, and may be considered to be made of a relatively soft material. In some examples, the second conductive portion 232 may be a soft conductive material such as conductive fiber, conductive plastic, or conductive rubber.

As for the material of the second roller main body 231, there may be no particular limitation, and for example, the second roller main body 231 may be a metal, a ceramic, an organic material, or the like.

The second roller main body 231 may have an outer circumferential surface, and the second conductive portion 232 may be fixed to the outer circumferential surface of the first roller main body 211. In some examples, the second conductive portion 232 may be attached by bonding, nesting, or otherwise. In other examples, the second roller main body 231 and the second conductive portion 232 may be integrally connected.

In the present embodiment, the hardness of the second conductive portion 232 is less than the hardness threshold, and is connected to the peripheral side of the second roller main body 231 so as to be in contact with the insulating film 600, so that the insulating film 600 can be effectively prevented from being cut. In addition, the soft second conductive portion 232 can transmit deformation under pressure so as to penetrate the opening in the insulating film 600 to contact the first conductive portion 212, thereby improving the detection effect of the opening defect in the insulating film 600.

According to some embodiments of the present application, the number of the delivery devices 200 is plural; the plurality of transfer devices 200 are arranged in order in the transfer direction of the insulating film 600.

The conveying device 200 may include a first roller 210 and a second roller 230, the two rollers may be disposed opposite to each other to form a pair of rollers, a gap between the pair of rollers may be used for the insulating film 600 to pass through, and at the same time, the electrical parameter tester 400 may detect a defect of the insulating film 600 located in the gap.

In the present embodiment, the number of the conveying devices 200 may be plural, and arranged in order in the conveying direction of the insulating film 600.

When there are multiple delivery devices 200, each of the first conductive part 212 and the second conductive part 232 of the delivery devices 200 may be electrically connected to the electrical parameter tester 400.

In some application scenarios, the surface of the first conductive portion 212 in a pair of rollers may have defects such as pits. If there is a hole in the insulating film 600 and the hole reaches the gap between the pair of rollers and is just opposite to the recess on the first conductive portion 212, the first conductive portion 212 and the second conductive portion 232 may not be reliably conducted, thereby resulting in missing defects on the insulating film 600.

In this embodiment, by providing a plurality of conveying devices 200, the occurrence of missing detection of defects on the insulating film 600 can be effectively avoided, and the validity of the detection result of the defects on the insulating film 600 can be improved.

According to some embodiments of the present application, as shown in fig. 1 to 3, the insulating film inspection apparatus further includes a marking device 500, the marking device 500 being electrically connected to the electrical parameter tester 400;

the marking device 500 is used for marking the insulating film 600 upon receiving a preset signal transmitted from the electrical parameter tester 400.

The marking device 500 may be a device capable of marking on the insulating film 600, for example, a laser marking machine or an electromagnetic marking machine, etc., and is not limited in particular.

The marking device 500 is electrically connected to the electrical parameter tester 400, for example, a wired connection may be provided therebetween. Alternatively, the two may be connected via a wireless communication module such as WiFi or bluetooth.

In conjunction with the description of the above embodiments, electrical parameter tester 400 may be connected to first conductive portion 212 and second conductive portion 232. When the insulating film 600 is normal, the first conductive portion 212 and the second conductive portion 232 may be in a relatively insulated state; when the insulating film 600 has a defect, the first conductive portion 212 and the second conductive portion 232 may be electrically connected to each other. When the first conductive part 212 is insulated or conducted with the second conductive part 232, different electrical parameter test results can be generated in the electrical parameter tester 400.

For example, when the electrical parameter test result is abnormal, for example, the resistance between the first conductive part 212 and the second conductive part 232 is smaller than the resistance threshold, or the current passing through the first conductive part 212 and the second conductive part 232 is larger than the current threshold, it can be considered that conduction occurs between the two conductive parts, and the insulating film 600 has a defect.

It can be seen that the result of the electrical parameter test performed by the electrical parameter tester 400 can reflect whether the insulating film 600 has defects.

In this embodiment, the marking device 500 is electrically connected to the electrical parameter tester 400, and when the electrical parameter test result of the electrical parameter tester 400 is abnormal, a preset signal may be sent to control the marking device 500 to operate, so as to mark the insulating film 600. Therefore, the user can scrap or partially cut the defective insulating film 600 according to the mark, and the utilization rate of the insulating film 600 is improved.

According to some embodiments of the present application, the marking device 500 is disposed at a downstream position of the first roller body 210 in the conveying direction of the insulation film 600.

Referring to fig. 1 to 3, the insulation film 600 may be conveyed in a left-to-right direction in fig. 1 to 3, and at this time, the downstream position of the first roller 210 may be located at the right side of the first roller 210, that is, the marking device 500 may be disposed at the right side of the first roller 210.

Of course, in practical applications, the conveying direction of the insulation film 600 may be adjusted as needed, but the marking device 500 may be disposed at a downstream position of the first roller 210 by designing the overall structure of the insulation film detection apparatus.

In some application scenarios, the marking device 500 may mark the insulating film 600 when receiving the preset signal, and the mark may be located on one side of the insulating film 600 at the defect position in the transmission direction of the insulating film 600. And as the conveying of the insulation film 600 is carried out, the marking device 500 can further mark the other side of the defect position of the insulation film 600, thereby providing double-side position reference for cutting off the defect part of the insulation film 600 and improving the utilization rate of the insulation film 600.

As for the timing of marking on both sides of the defect position by the marking device 500, it is possible to set in combination with the conveying speed of the insulating film 600, the distance between the first roller 210 and the marking device 500, and the like, and a description thereof will not be given.

According to some embodiments of the present application, the electrical parameter tester 400 includes a power supply and a detection circuit, the first conductive part 212 and the second conductive part 232 are respectively connected to two output terminals of the power supply;

the sensing circuit is used to sense the resistance or current between the first conductive portion 212 and the second conductive portion 232.

In this embodiment, the power supply may be a dc power supply or an ac power supply, and this may not be specifically limited.

The sensing circuit may be used to sense a resistance or current between the first conductive portion 212 and the second conductive portion 232, for example, the sensing circuit may include an ammeter or a resistance measuring device, etc.

For example, the detection current may include an ammeter, and the power source, the ammeter, the first conductive part 212, and the second conductive part 232 may be connected in series. When the insulating film 600 is normal, the first conductive portion 212 and the second conductive portion 232 are reliably insulated, and the current value detected in the ammeter is small. When the insulating film 600 has a defect, the first conductive part 212 and the second conductive part 232 are electrically connected, and the current value detected in the ammeter is large. The magnitude of the current value detected by the ammeter reflects the presence or absence of defects in the insulating film 600.

Similarly, when the detection circuit includes a resistance measurement device, the resistance value detected by the resistance measurement device may reflect the presence or absence of a defect in the insulating film 600.

In this embodiment, electrical parameter tester 400 includes power and detection circuitry, and it can detect whether insulating film 600 has the defect according to the electrical parameter that detection circuitry can gather, helps improving the convenient degree that insulating film 600 defect detected.

According to some embodiments of the application, the power supply is a direct current power supply.

It is understood that, in practical applications, the first conductive portion 212 and the second conductive portion 232 may form an equivalent capacitance therebetween. In this embodiment, the power supply is set as a dc power supply, so that the power supply current can be prevented from directly passing through the equivalent capacitor, and the breakdown between the first roller 210 and the matching structure 220 due to the peak generated by voltage fluctuation can be effectively avoided.

Therefore, in this embodiment, the power supply is a dc power supply, which is helpful to improve the reliability of the detection process of the insulating film 600.

In some possible embodiments, the output voltage of the power supply can be adjusted, for example, between 5V and 2000V, so as to adapt to the detection of the insulation films 600 with different materials, thicknesses and kinds, and improve the defect detection effect.

The insulating film inspection apparatus provided in the embodiments of the present application is described below with reference to a specific application example.

As shown in fig. 1 to 3, the insulating film detecting apparatus includes a down-pressure cylinder (corresponding to the pressure adjusting device 300), a press roller (corresponding to the first roller 210), a fixed roller (corresponding to the second roller 230), a current/resistance tester (corresponding to the electrical parameter tester 400), a signal transmitting device, and a marking linkage device (corresponding to the marking device 500). The insulating film 600 to be tested may be a separator in a battery pole piece.

The fixed roller and the compression roller are electrically connected with the positive and negative output ends of the link current/resistance tester, the diaphragm forms a certain contact surface on the fixed roller in the conveying process, and the compression roller and the soft conductive material of the fixed roller form a front and back face tight-attaching state on the diaphragm through the pressing cylinder.

One press roll and one fixed roll may constitute a pair of rolls. In order to improve the detection effect, a plurality of pairs of rollers can be connected in parallel with the same tester.

When the separator is defect free, the current/resistance tester may show an OK resistance (on the order of M Ω or more) or an OK current (on the order of μ a or less).

If pinholes or metal particles exist on the separator, the soft roll surfaces of the two rolls are brought into a conduction state, and the tester shows an NG resistance value (level below K Ω) or an NG current (level above mA). At this moment, the tester can send NG signal to the linkage and beat mark device 500 and beat the mark processing to the diaphragm, and convenient follow-up single book or the pulling out of unusual diaphragm is scrapped, promotes the utilization ratio of pole piece.

In accordance with the embodiments of the present application as set forth above, these embodiments are not exhaustive or limit the embodiments to the precise embodiments of the application. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims (10)

1. An insulating film inspection apparatus, characterized by comprising:

a frame;

the conveying device is arranged on the rack and comprises a first roller body and a matching structure, the first roller body comprises a first conductive part, the matching structure comprises a second conductive part, and a conveying space for the insulating film is arranged between the first conductive part and the second conductive part;

the pressure adjusting device is arranged on the frame and is used for adjusting the pressure of the conveying device acting on the insulating film;

and the electrical parameter tester is electrically connected with the first conductive part and the second conductive part.

2. The insulating film inspection apparatus according to claim 1, wherein a first end of the pressure adjustment device is fixedly connected to the frame, and a second end of the pressure adjustment device is rotatably connected to the first roller body, wherein the second end of the pressure adjustment device is a pressure output end of the pressure adjustment device.

3. The insulating film inspection apparatus according to claim 1, wherein the first roller body further comprises a first roller main body, the first conductive portion is fixedly connected to a peripheral side of the first roller main body, and a hardness of the first conductive portion is less than a hardness threshold value.

4. The insulating film inspection apparatus as claimed in claim 1, wherein said matching structure is a second roller body rotatably connected to said frame.

5. The insulating film inspection apparatus according to claim 4, wherein the second roller body includes a second roller main body and the second conductive portion; the second conductive portion is fixedly connected to the peripheral side of the second roller main body, and the hardness of the second conductive portion is smaller than a hardness threshold value.

6. The insulating film inspection apparatus according to claim 4, wherein the number of the conveying means is plural; the plurality of conveying devices are arranged in sequence in a conveying direction of the insulating film.

7. The insulating film inspection apparatus as claimed in claim 1, further comprising a marking device electrically connected to the electrical parameter tester;

the marking device is used for marking the insulating film under the condition of receiving a preset signal sent by the electrical parameter tester.

8. The insulating film inspecting apparatus according to claim 7, wherein said marking device is provided at a downstream position of said first roller in a conveying direction of the insulating film.

9. The insulating film inspection apparatus as claimed in claim 1, wherein said electrical parameter tester includes a power supply and inspection circuit, said first conductive part and said second conductive part being connected to two output terminals of said power supply, respectively;

the detection circuit is used for detecting the resistance or the current between the first conductive part and the second conductive part.

10. The insulating film inspection apparatus as claimed in claim 9, wherein said power supply is a direct current power supply.

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