Separator inspection apparatus and method

Abstract

Provided in the embodiments of the present application are a separator inspection apparatus and method. The apparatus comprises: a light-emitting apparatus, which is electrically connected to a processor and used for emitting inspection light to a separator, such that the separator reflects the inspection light to form reflected light; a light-receiving apparatus, which is electrically connected to the processor and used for receiving the reflected light and sending same to the processor; the processor, which is electrically connected to an abnormality detection apparatus and is used for determining, on the basis of the reflected light, an inspection voltage corresponding to the separator and sending the inspection voltage to the abnormality detection apparatus; and the abnormality detection apparatus, which is used for applying a voltage to the separator according to the inspection voltage, so as to measure the resistance of the separator and send same to the processor, thereby triggering the processor to determine, on the basis of the resistance, whether the separator is abnormal. The apparatus is used for achieving the effect of improving the separator inspection accuracy.

Description

Membrane detection device and method

[0001] This application claims priority to the Chinese patent application No. 202411336021.0 filed on September 24, 2024, and entitled "Membrane detection device and method", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, in particular to a membrane detection device and method. BACKGROUND

[0003] In the process of manufacturing a battery, due to insufficient process control and other reasons, abnormalities may occur inside the battery, which may cause leakage current in the process of charging and discharging of the finished battery. The occurrence of leakage current may accelerate the consumption of the battery and even cause the battery to catch fire and explode. Therefore, abnormal detection of the battery is particularly important to ensure the safety performance of the battery.

[0004] Currently, a fixed size of detection voltage is usually applied to the membrane to measure the resistance of the membrane, so as to determine whether the battery has an abnormality. However, after the detection voltage is applied to the membrane, the membrane may be broken down, thereby destroying the original state on the membrane and causing deviation in the measurement result. SUMMARY

[0005] Embodiments of the present application provide a membrane detection device and method to improve the accuracy of membrane detection.

[0006] In a first aspect, embodiments of the present application provide a membrane detection device, comprising:

[0007] A light emitting device, electrically connected to the processor, for emitting detection light to the membrane to cause the membrane to reflect the detection light to form reflected light;

[0008] A light receiving device, electrically connected to the processor, for receiving and sending the reflected light to the processor;

[0009] A processor, electrically connected to the abnormality detection device, for determining a detection voltage corresponding to the membrane based on the reflected light, and sending the detection voltage to the abnormality detection device;

[0010] An abnormality detection device for applying a voltage to the membrane according to the detection voltage, measuring the resistance of the membrane and sending the resistance to the processor, and triggering the processor to determine whether the membrane has an abnormality based on the resistance.

[0011] In a possible implementation, the film sheet detection device further comprises a light shielding device, and the light emitting device and the light receiving device are arranged in the light shielding device.

[0012] In a possible implementation, the abnormality detection device comprises:

[0013] A clamping device, in which a film sheet containing gap is formed, and the film sheet containing gap is used for placing the film sheet;

[0014] A voltage source, which is electrically connected with the clamping device and the processor respectively, and is used for receiving the detection voltage sent by the processor, and applying the detection voltage to the film sheet through the clamping device when the film sheet exists in the film sheet containing gap;

[0015] A resistance detection device, which is arranged on the clamping device and is used for detecting the resistance of a target position, the target position being a position where the film sheet contacts the clamping device.

[0016] In a possible implementation, the clamping device comprises:

[0017] An upper roller and a lower roller arranged in an up-down manner, and both of which are connected with the voltage source, the main body of the upper roller and the main body of the lower roller are both made of elastic material, and the surface of the upper roller and the surface of the lower roller are both covered with conductive material.

[0018] In a possible implementation, the film sheet detection device further comprises:

[0019] An adjusting mechanism, which is arranged on the clamping device and is used for adjusting the size of the film sheet containing gap.

[0020] In a possible implementation, the film sheet detection device further comprises a display device, which is electrically connected with the abnormality detection device, and is used for displaying the resistance of the film sheet.

[0021] In a second aspect, an embodiment of the present application provides a detection method based on the device of the first aspect, comprising:

[0022] Controlling the light emitting device to emit detection light to the film sheet, so that the film sheet reflects the detection light to form reflected light;

[0023] Controlling the light receiving device to receive the reflected light;

[0024] Determining the detection voltage corresponding to the film sheet based on the reflected light;

[0025] Controlling the abnormality detection device to apply voltage to the film sheet according to the detection voltage, so as to obtain the resistance of the film sheet;

[0026] The presence of an abnormality in the diaphragm is determined based on the resistance.

[0027] In one possible implementation, determining the detection voltage corresponding to the diaphragm based on the reflected light includes:

[0028] The intensity of the reflected light and the intensity of the detected light are obtained.

[0029] The reflectivity of the diaphragm is obtained by dividing the intensity of the reflected light by the intensity of the detected light.

[0030] The material of the diaphragm is determined based on the reflectivity;

[0031] The detection voltage corresponding to the diaphragm is determined based on the material of the diaphragm.

[0032] In one possible implementation, controlling the anomaly detection device to apply a voltage to the diaphragm according to the detection voltage to obtain the resistance of the diaphragm includes:

[0033] If the clamping device holds the diaphragm, the voltage source is triggered to apply the detection voltage to the diaphragm according to the detection voltage;

[0034] The control resistance detection device detects the resistance at a target position of the diaphragm; the target position is the position where the diaphragm contacts the clamping device.

[0035] In one possible implementation, determining whether the diaphragm is abnormal based on the resistance includes:

[0036] Determine whether the resistance at the target location is greater than a first preset resistance threshold and less than a second preset resistance threshold;

[0037] If the resistance at the target location is less than a first preset resistance threshold or greater than a second preset resistance threshold, then it is determined that there is an anomaly at the target location.

[0038] Thirdly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0039] The memory stores computer-executed instructions;

[0040] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0041] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0042] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program, and the computer program is executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0043] The membrane detection device and method provided by the embodiment of the present application can detect the membrane more accurately by emitting light to the membrane to make the membrane reflect the detection light to form reflected light, receiving the reflected light by the light receiving device, determining the detection voltage corresponding to the membrane by the processor through the reflected light, and applying the voltage to the membrane according to the detection voltage by the abnormality detection device, so that the membrane will not produce breakdown effect after the detection voltage is applied. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] FIG. 1 is a structural schematic diagram of a battery provided by the present application;

[0046] FIG. 2(a) is a structural schematic diagram of a membrane detection device provided by the present application;

[0047] FIG. 2(b) is a structural schematic diagram of another membrane detection device provided by the present application;

[0048] FIG. 3(a) is a connection structure schematic diagram of an adjusting mechanism and a clamping device provided by the present application;

[0049] FIG. 3(b) is a connection structure schematic diagram of another adjusting mechanism and a clamping device provided by the present application;

[0050] FIG. 3(c) is a connection structure schematic diagram of another adjusting mechanism and a clamping device provided by the present application;

[0051] FIG. 3(d) is a connection structure schematic diagram of another adjusting mechanism and a clamping device provided by the present application;

[0052] FIG. 4(a) is a connection structure schematic diagram of another adjusting mechanism and a clamping device provided by the present application;

[0053] FIG. 4(b) is a connection structure schematic diagram of another adjusting mechanism and a clamping device provided by the present application;

[0054] Fig. 5(a) is a flowchart of a method for detecting a diaphragm according to the present application;

[0055] Fig. 5(b) is a graph showing the relationship between the frequency or wavelength of reflected light and reflectivity according to the present application;

[0056] Fig. 6 is a flowchart of a method for detecting the resistance of a diaphragm using an abnormality detection device according to the present application;

[0057] Fig. 7(a) is a graph showing the relationship between the position of a diaphragm and the resistance of the diaphragm according to the present application;

[0058] Fig. 7(b) is a graph showing the relationship between the position of a diaphragm and the resistance of the diaphragm according to the present application;

[0059] Fig. 8 is a schematic diagram of a diaphragm detection system according to the present application;

[0060] Fig. 9 is a schematic diagram of an electronic device according to the present application.

[0061] Reference numerals: 1: positive electrode sheet; 2: diaphragm; 3: negative electrode sheet; 4: light shielding device; 10: diaphragm; 20: diaphragm detection device; 21: light emitting device; 22: light receiving device; 23: processor; 24: abnormality detection device; 25: display device; 261: upper roller; 262: lower roller; 263: conveyor belt; 264: driving roller; 265: driven roller; 291: fixing plate; 292: compression spring; 293: stepping motor; 294: screw structure.

[0062] The specific embodiments of the present application have been shown and described in the above-described drawings and text. The following detailed description is made with reference to the drawings and text, and is not intended to limit the scope of the present application in any way. Rather, the following detailed description is intended to explain the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0063] The exemplary embodiments will be described in detail with reference to the drawings. In the following description, like numbers refer to like elements throughout the drawings and text. The embodiments described in the following exemplary embodiments are not meant to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0064] In the description of the embodiments of the present application, it should be understood that, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection" should be construed broadlyly, for example, can be fixed connection, can also be indirectly connected through the intermediate medium, can be the communication of the structure of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] The terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0066] The terms "first", "second", "third", "fourth" and the like in the specification of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0067] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction 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 refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0068] After the battery is manufactured, the battery needs to be detected for abnormalities. The current battery detection method includes: detecting a first open circuit voltage of the battery in a constant temperature environment, then detecting a second open circuit voltage of the battery after the battery is placed in the constant temperature environment for a preset time length, calculating an average voltage drop of the battery per unit time according to the first open circuit voltage and the second open circuit voltage, and finally determining that the battery whose average voltage drop per unit time exceeds a preset voltage value is an abnormal battery. However, this method can only detect whether there is an abnormality in the battery, and cannot determine the cause of the abnormality of the battery and the specific position of the abnormal point.

[0069] In order to analyze the cause of the abnormality of the battery and the specific position of the abnormal point, so as to take measures in advance to reduce the probability of the abnormality of the battery in the subsequent production process of the battery, a new resistance detection method is added, that is, a detection voltage is applied to the diaphragm, then the resistance of each region of the diaphragm is detected, and finally the specific position of the abnormality of the battery is determined based on the resistance. The method measures the resistance value of the diaphragm by placing the diaphragm between two conductive foils and controlling the conductive foils to clamp the diaphragm, and then applying a fixed size detection voltage to the diaphragm through the conductive foils, so as to determine whether the diaphragm is abnormal. However, since the materials of the diaphragm may be different, and the voltages that can be withstood by different materials are also different, therefore, applying the same size detection voltage to the diaphragm of different materials may cause the breakdown effect of the diaphragm, damage the original state of the diaphragm, and thus lead to inaccurate measurement results.

[0070] To solve the above problems, the application provides a diaphragm detection device, which detects the material of the diaphragm first to determine the detection voltage corresponding to the material, thereby avoiding the diaphragm from being broken after the detection voltage is applied to the diaphragm. In this way, the state of the original metal particles on the diaphragm will not be damaged, thereby ensuring the accuracy of the detection results of the diaphragm.

[0071] FIG. 1 is a structural schematic diagram of a battery, which includes a positive electrode sheet 1, a negative electrode sheet 3, and a diaphragm 2 arranged between the positive electrode sheet 1 and the negative electrode sheet 3. The positive electrode sheet, the negative electrode sheet, and the diaphragm can all be called diaphragms. According to the structure of the battery, the battery can be disassembled to take out the positive electrode sheet, the negative electrode sheet, and the diaphragm.

[0072] The technical solutions of the application and how the technical solutions of the application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the application will be described below with reference to the drawings.

[0073] Fig. 2(a) is a structural schematic diagram of the membrane detection device provided by the present application. As shown in Fig. 2(a), the membrane detection device 20 comprises a light emitting device 21, a light receiving device 22, a processor 23, an abnormality detection device 24 and a display device 25.

[0074] The light emitting device 21 is electrically connected to the processor 23, and the light emitting device 21 is configured to emit detection light to the membrane so that the membrane reflects the detection light to form reflected light. The light receiving device 22 is electrically connected to the processor 23, and the light receiving device 22 is configured to receive and send the reflected light to the processor 23.

[0075] The processor 23 is electrically connected to the abnormality detection device 24, and the processor 23 is configured to determine a detection voltage corresponding to the membrane based on the reflected light, and send the detection voltage to the abnormality detection device 24.

[0076] The abnormality detection device 24 is electrically connected to the display device 25, and the abnormality detection device 24 is configured to apply a voltage to the membrane according to the detection voltage, measure and send the resistance of the membrane to the processor 23 and the display device 25, trigger the processor 23 to determine whether the membrane has an abnormality based on the resistance, and trigger the display device 25 to display the resistance of the membrane.

[0077] The abnormality detection device 24 comprises a clamping device, a voltage source, a resistance detection device and an adjusting mechanism. The clamping device has a membrane containing gap formed therein, and the membrane containing gap is configured to place the membrane. The adjusting mechanism is arranged on the clamping device, and the adjusting mechanism is configured to adjust the size of the membrane containing gap. The voltage source is electrically connected to the clamping device and the processor, and the voltage source is configured to receive the detection voltage sent by the processor, and apply the detection voltage to the membrane through the clamping device in the case that the membrane exists in the membrane containing gap. The resistance detection device is arranged on the clamping device and is electrically connected to the display device, and the resistance detection device is configured to detect and send the resistance of the target position to the display device, and trigger the display device to display the position information of the target position and the resistance of the target position. The target position is the position where the membrane contacts the clamping device. The display device is, for example, an electronic device comprising a display screen.

[0078] Further, as shown in Fig. 2(b), the membrane detection device further comprises a light shielding device 4, and the light emitting device 21 and the light receiving device 22 are arranged in the light shielding device 4, and the light shielding device 4 is configured to isolate ambient light. In this way, the interference of ambient light on the detection light and the reflected light can be avoided, so that the membrane can be detected more accurately. In some embodiments, the light shielding device is, for example, a light shielding cover. The detection light is a continuous spectrum, and the spectral frequency is in the visible light to near infrared range.

[0079] The film detection device provided by the embodiment can emit detection light to the film through the light emitter, so that the film reflects the detection light to form reflected light; then the reflected light is received by the light receiver, so that the processor can determine the detection voltage corresponding to the film through the reflected light, and the abnormality detection device can apply a voltage to the film according to the detection voltage, so that the film will not produce a breakdown effect after the detection voltage is applied, and the resistance of the film can be detected more accurately.

[0080] As shown in FIGS. 3(a) to 3(c), the clamping device includes an upper roller 261 and a lower roller 262 arranged in a vertical direction. The upper roller 261 is connected with one contact of the voltage source 27, and the lower roller 262 is connected with another contact of the voltage source 27. The adjusting mechanism 29 includes a compression spring 292 and a fixed plate 291, and the adjusting mechanism 29 can be connected with the upper roller 261 and / or the lower roller 262. If the adjusting mechanism 29 is connected with the upper roller 261, one end of the compression spring 292 is fixedly connected with the fixed plate 291, and the other end of the compression spring 292 abuts against the upper roller 261, that is, the connection structure between the adjusting mechanism and the clamping device is shown in FIG. 3(a). If the adjusting mechanism 29 is connected with the lower roller 262, one end of the compression spring 292 is fixedly connected with the fixed plate 291, and the other end of the compression spring 292 abuts against the lower roller 262, that is, the connection structure between the adjusting mechanism and the clamping device is shown in FIG. 3(b). If the adjusting mechanism 29 is multiple and connected with the upper roller 261 and the lower roller 262 respectively, one end of each compression spring 292 is fixedly connected with the corresponding fixed plate 291, the other end of one compression spring 292 abuts against the upper roller 261, and the other end of the other compression spring 292 abuts against the lower roller 262, that is, the connection structure between the adjusting mechanism and the clamping device is shown in FIG. 3(c). The conveying direction of the film is from the light shielding device to the clamping device.

[0081] In addition, the clamping device can further comprise a traction device configured to move the film in the film-containing gap formed by the upper roller and the lower roller, so that the resistance of each region of the film can be detected. Alternatively, the clamping device can comprise a first motor and / or a second motor, wherein the first motor is configured to drive the upper roller to rotate, and the first motor can be coaxially connected to the upper roller or can drive the upper roller to rotate through a gear set; the second motor is configured to drive the lower roller to rotate, and the second motor can be coaxially connected to the lower roller or can drive the lower roller to rotate through a gear set. The first motor and the second motor are electrically connected to the processor and controlled by the processor, so as to drive the upper roller and the lower roller to rotate in opposite directions. Since the film is located in the film-containing gap formed by the upper roller and the lower roller, there is friction between the film and the upper roller and the lower roller. Therefore, when the first motor drives the upper roller to rotate and / or the second motor drives the lower roller to rotate, the film can move in the film-containing gap. In this way, the film passes through the film-containing gap formed by the upper roller and the lower roller continuously and uninterruptedly, so that the film can be continuously detected by the resistance detection device when detecting the resistance of the target position, complete resistance detection data is formed, and the occurrence of missed detection is avoided.

[0082] The clamping device comprises an upper roller 261 and a lower roller 262 arranged in a stacked manner. The adjusting mechanism comprises a stepper motor 293 and a screw structure 294, the stepper motor 293 is connected to one end of the screw structure 294, the other end of the screw structure 294 is rotationally connected to the upper roller 261 and / or the lower roller 262, the stepper motor 293 is configured to drive the screw structure 294 to rotate, thereby driving the upper roller 261 and / or the lower roller 262 to move up and down along the screw structure 294, so that the size of the film-containing gap between the upper roller and the lower roller changes. If the other end of the screw structure 294 is rotationally connected to the base of the upper roller 261, the connection structure diagram of the adjusting mechanism and the clamping device shown in FIG. 3(d) can be obtained.

[0083] Further, the main body of the upper roller and the main body of the lower roller are both made of elastic material, and the surface of the upper roller and the surface of the lower roller are both covered with conductive material. The elastic material is, for example, rubber. The conductive material is, for example, copper or silver. Specifically, the main body of the upper roller and the main body of the lower roller can be made of rubber, and then the surface of the upper roller and the surface of the lower roller are plated with copper or silver. In this way, since the main body of the upper roller and the main body of the lower roller are made of elastic material, the film is not easily crushed when the film is clamped by the clamping device, i.e., when the film is placed in the film-containing gap formed by the upper roller and the lower roller. In addition, by covering the surface of the upper roller and the surface of the lower roller with conductive material, the clamping device has good conductivity, ensuring that the voltage source can apply a detection voltage to the film through the clamping device, thereby improving the accuracy of the film detection result.

[0084] In combination with FIG. 4(a) and FIG. 4(b), the clamping device is, for example, a conveying device and an upper roller 261 arranged above the conveying device, wherein the upper roller 261 and the transmission device form a film containing gap. The conveying device includes a conveying belt 263, a driving roller 264, a driven roller 265, and a power mechanism. One end of the conveying belt 263 is arranged around the driving roller 264, and the other end of the conveying belt 263 is arranged around the driven roller 265. The power mechanism is used to drive the driving roller 264 to rotate, thereby driving the driven roller 265 to rotate, so that the conveying belt 263 rotates around the driving roller 264 and the driven roller 265, and then the film 10 is conveyed into the film containing gap formed by the upper roller 261 and the conveying belt 263. In this way, the film passes through the film containing gap formed by the upper roller and the conveying belt continuously and uninterruptedly, so that the diaphragm can be continuously detected by the resistance detection device in the subsequent detection of the resistance of the target position, forming complete resistance detection data, and avoiding the occurrence of missed detection. Further, one contact of the voltage source is connected to the upper roller 261, and the other contact of the voltage source is connected to the conveying point. The conveying belt 263 includes conductive materials such as carbon black, metal powder, or conductive fibers. In this way, the voltage source can apply a detection voltage to the film through the clamping device. If the adjusting mechanism includes a compression spring 292 and a fixed plate 291, one end of the compression spring 292 is fixedly connected to the fixed plate 291, and the other end of the compression spring 292 is in abutment with the upper roller 261. Then, the connection structure diagram of the adjusting structure and the clamping device shown in FIG. 4(a) can be obtained. If the adjusting mechanism includes a screw structure 294 and a stepper motor 293, the stepper motor 293 is connected to one end of the screw structure 294, and the other end of the screw structure 294 is rotationally connected to the upper roller 261. Then, the connection structure diagram of the adjusting structure and the clamping device shown in FIG. 4(b) can be obtained. In this way, if the stepper motor 293 drives the screw structure 294 to rotate, the upper roller 261 can be driven to move closer to or away from the conveying device, so that the size of the film containing gap between the upper roller 261 and the conveying device changes.

[0085] FIG. 5(a) is a flowchart of a film detection method provided by the present application. As shown in FIG. 5(a), the film detection method can include the following steps:

[0086] In step S501, the light emitting device is controlled to emit detection light to the film, so that the film reflects the detection light to form reflected light.

[0087] Specifically, the light emitting device can be controlled to emit detection light when the film enters the light shielding device. Since the light emitting device is arranged in the light shielding device, the detection light can reach the film after the film enters the light shielding device.

[0088] Step S502, control the light receiving device to receive the reflected light.

[0089] Step S503, determine the detection voltage corresponding to the diaphragm based on the reflected light.

[0090] The reflected light intensity of the reflected light and the detection light intensity of the detection light can be obtained; then the reflectivity of the diaphragm is obtained by dividing the reflected light intensity by the detection light intensity; then the material of the diaphragm is determined according to the reflectivity; finally, the detection voltage corresponding to the diaphragm is determined based on the material of the diaphragm. In this way, the detection voltage of the diaphragm can be determined according to the material characteristics of the diaphragm, so as to avoid the diaphragm from being broken down by the detection voltage, thereby ensuring the accuracy of the detection.

[0091] As shown in FIG. 5(b), the detection light is a continuous spectrum, and the spectral frequency is in the visible light to near-infrared range. After the diaphragm is subjected to the detection light, the diaphragm reflects the detection light to form the reflected light, and the curve relationship between the frequency or wavelength of the reflected light and the reflectivity is shown in FIG. 5.

[0092] Step S504, control the abnormality detection device to apply a voltage to the diaphragm according to the detection voltage, so as to obtain the resistance of the diaphragm.

[0093] Step S505, determine whether the diaphragm has an abnormality based on the resistance of the diaphragm.

[0094] Specifically, the processor can determine whether the resistance is greater than a first preset resistance threshold and less than a second preset resistance threshold. If the resistance is less than the first preset resistance threshold or greater than the second preset resistance threshold, it is determined that the diaphragm has an abnormality. If the resistance is greater than the first preset resistance threshold and less than the second preset resistance threshold, it is determined that the diaphragm does not have an abnormality.

[0095] Based on the embodiment of FIG. 5(a), the present application provides a method for controlling the abnormality detection device to detect the resistance of the diaphragm, as shown in FIG. 6. The method for controlling the abnormality detection device to detect the resistance of the diaphragm can include the following steps:

[0096] Step S601, if the diaphragm exists in the diaphragm-containing gap of the clamping device, drive the adjusting mechanism to adjust the size of the diaphragm-containing gap until the clamping pressure received by the diaphragm is equal to the target pressure.

[0097] Specifically, the clamping device is provided with a clamping monitoring device. The clamping monitoring device can be arranged in the film receiving gap. When the clamping signal sent by the clamping monitoring device is received, it is determined that there is a film in the film receiving gap of the clamping device. The clamping device can be electrically connected to the processor. When the clamping signal sent by the clamping monitoring device is received, the processor triggers the voltage source to apply a detection voltage to the film. The clamping monitoring device is, for example, a photoelectric switch. When the photoelectric switch is blocked, the photoelectric switch generates an electric signal. The electric signal generated by the photoelectric switch is determined as the clamping signal generated by the clamping monitoring device. The clamping monitoring device can also be a mechanical switch. When the mechanical switch is touched, the mechanical switch generates an electric signal. The electric signal generated by the mechanical switch is determined as the clamping signal generated by the clamping monitoring device.

[0098] The clamping device is provided with a pressure monitoring device for monitoring the clamping pressure of the film. Because the thickness of the film of different batteries can be different, if the size of the film receiving gap is not changed, the thicker film can be subjected to greater clamping pressure, causing the rupture of the conductive particles on the film, thereby destroying the original state of the film and causing false resistance measurement. For thin films with small thickness, the film can not be in good contact with the first roller and / or the second roller, so that the voltage cannot be applied to the target position. Therefore, after the film is placed in the film receiving gap, the clamping pressure of the film needs to be measured and adjusted to ensure that the clamping pressure of the film is equal to the target pressure, so as to achieve good contact effect while ensuring the integrity of the conductive particles. The pressure monitoring device is, for example, a pressure sensor.

[0099] The driving adjustment mechanism adjusts the size of the film receiving gap. If the clamping pressure monitored by the pressure monitoring device is greater than the target pressure, the adjustment mechanism is triggered to expand the size of the film receiving gap. Or, if the clamping pressure monitored by the pressure monitoring device is less than the target pressure, the adjustment mechanism is triggered to reduce the size of the film receiving gap.

[0100] Specifically, if the adjustment structure includes a fixed plate and a compression spring, the pre-tightening force of the compression spring is adjusted until the clamping pressure detected by the pressure detection device is equal to the target pressure. In this way, by adjusting the pre-tightening force of the compression spring, the size of the film receiving gap can be adjusted, so as to adjust the clamping pressure of the film. Finally, the adjusted pre-tightening force is kept unchanged.

[0101] Or, if the adjustment structure includes a lead screw structure and a stepper motor, the stepper motor is controlled to drive the lead screw structure, so as to adjust the size of the film receiving gap until the clamping pressure of the film is equal to the target pressure.

[0102] In step S602, the voltage source is triggered to apply a detection voltage to the film, and the film is controlled to move in the film receiving gap.

[0103] Specifically, the film is controlled to move in the film containing gap, including: if the clamping device includes an upper roller, a lower roller and a traction device, the traction device can be controlled to pull the film to move in the film containing gap.

[0104] Or, if the clamping device includes an upper roller, a first motor for driving the upper roller to rotate, and a lower roller, the first motor can be controlled to rotate. Since the film is located in the film containing gap formed by the upper roller and the lower roller, there is friction between the film and the upper roller and the lower roller. Therefore, under the condition that the first motor drives the upper roller to rotate, the film can move in the film containing gap.

[0105] Or, if the clamping device includes an upper roller, a second motor for driving the lower roller to rotate, and a lower roller, the second motor can be controlled to rotate. Since the film is located in the film containing gap formed by the upper roller and the lower roller, there is friction between the film and the upper roller and the lower roller. Therefore, under the condition that the second motor drives the lower roller to rotate, the film can move in the film containing gap.

[0106] Or, if the clamping device includes a conveying device and an upper roller arranged above the conveying device, the conveying belt in the conveying device can be controlled to convey the film to the film containing gap and move in the film containing gap.

[0107] Step S603: Obtain the resistance of the target position. The target position is the position where the film contacts the clamping device.

[0108] Specifically, the resistance acquisition instruction can be sent to the resistance detection device to trigger the resistance detection device to feed back the detected resistance.

[0109] Further, after obtaining the resistance of the target position, it can be determined whether the resistance of the target position is greater than a first preset resistance threshold and less than a second preset resistance threshold, so as to determine whether the target position is abnormal.

[0110] Further, if the resistance of the target position is less than the first preset resistance threshold, it is determined that the target position is abnormal, and the abnormal reason is that the target position is short-circuited. Because, in the case that the film has a short-circuit point, the resistance of the short-circuit point position is smaller than that of other positions. Therefore, in the case that the resistance of the target position is less than the first preset resistance threshold, it can be determined that the target position is short-circuited.

[0111] If the resistance of the target position is greater than the second preset resistance threshold, it is determined that the target position has an abnormality, and the abnormality is that the target position has foreign matter. Since the conductivity of the position on the diaphragm where the foreign matter is attached is less than the conductivity of the position on the diaphragm where the foreign matter is not attached, the resistance of the position on the diaphragm where the foreign matter is attached is much greater than the resistance of the position on the diaphragm where the foreign matter is not attached. Therefore, in the case where the resistance of the target position is greater than the second preset resistance threshold, it can be determined that the target position has the foreign matter attached thereto.

[0112] The resistance of each target position can be determined whether it is greater than the first preset resistance threshold and less than the second preset resistance threshold after the resistance of each target position is acquired. Alternatively, the resistance of each target position can be determined whether it is greater than the first preset resistance threshold and less than the second preset resistance threshold after the resistance of all regions on the diaphragm is acquired. Alternatively, the resistance of each target position can be displayed by the display device after the resistance of all regions on the diaphragm is acquired, so as to determine whether the resistance of each target position is greater than the first preset resistance threshold and less than the second preset resistance threshold.

[0113] The relationship between the position of the diaphragm and the resistance of the diaphragm displayed by the display screen is shown in FIGS. 7(a) and 7(b). The abscissa is the position of the measured point, i.e., the coordinate information of the target position on the diaphragm. The ordinate is the resistance of the measured point, i.e., the resistance of the target position. As shown in FIG. 7(a), it can be determined that the position X L is a short-circuit point. As shown in FIG. 7(b), it can be determined that the position X a is a short-circuit point, and the position X b is a position where the foreign matter is located.

[0114] The method for detecting the resistance of the diaphragm by the control abnormality detection device provided in the embodiments of the present application includes the following steps: placing the diaphragm in the film-containing gap of the clamping device, then controlling the adjusting mechanism to adjust the size of the film-containing gap, so that the clamping device can clamp the diaphragm, to ensure the stable structure between the clamping device and the diaphragm, then controlling the voltage source to apply a detection voltage to the diaphragm, and finally acquiring the resistance of the target position. In this way, the diaphragm can be prevented from being broken down under inappropriate clamping pressure and applied voltage, so that the resistance of the position where the diaphragm contacts the clamping device can be more accurately obtained. Meanwhile, the diaphragm is controlled to move in the film-containing gap, so that the resistance of each position on the diaphragm can be obtained. Since the resistance of the short-circuit position is less than the resistance of the position without short circuit, the resistance of each position is more accurately measured, the position of the short-circuit point on the diaphragm can be more accurately determined, the occurrence of missed detection is reduced, and the efficiency of detecting the short-circuit point of the battery diaphragm is improved.

[0115] FIG. 8 is a structural schematic diagram of a diaphragm detection system 800 provided in an embodiment of the present application. As shown in FIG. 8, the diaphragm detection system 800 comprises a first control module 801, a second control module 802, a first determination module 803, a third control module 804, and a second determination module 805. The first control module 801 is configured to control a light emitting device to emit detection light to the diaphragm, so that the diaphragm reflects the detection light to form reflected light. The second control module 802 is configured to control a light receiving device to receive the reflected light. The first determination module 803 is configured to determine a detection voltage corresponding to the diaphragm based on the reflected light. The third control module 804 is configured to control an abnormality detection device to apply a voltage to the diaphragm according to the detection voltage, so as to obtain a resistance of the diaphragm. The second determination module 805 is configured to determine whether the diaphragm is abnormal based on the resistance.

[0116] The first determination module is configured to obtain a reflected light intensity of the reflected light and a detection light intensity of the detection light, obtain a reflectivity of the diaphragm by dividing the reflected light intensity by the detection light intensity, determine a material of the diaphragm according to the reflectivity, and determine the detection voltage corresponding to the diaphragm based on the material of the diaphragm.

[0117] If the diaphragm exists in the film accommodation gap of the clamping device, the third control module is configured to trigger a voltage source to apply the detection voltage to the diaphragm according to the detection voltage, and control the diaphragm to move in the film accommodation gap; and obtain a resistance of a target position, the target position being a position where the diaphragm contacts the clamping device.

[0118] The second determination module is configured to determine whether the resistance of the target position is greater than a first preset resistance threshold and less than a second preset resistance threshold; and if the resistance of the target position is less than the first preset resistance threshold or greater than the second preset resistance threshold, determine that the target position is abnormal.

[0119] The diaphragm detection system provided in the embodiment can execute the method provided in the method embodiment, and has similar implementation principles and technical effects, which will not be described here again in the embodiment.

[0120] FIG. 9 is a structural schematic diagram of an electronic device provided in the present application. As shown in FIG. 9, the electronic device 900 provided in the embodiment comprises at least one processor 23 and a memory 902. Optionally, the device 900 further comprises a communication component 903. The processor 23, the memory 902, and the communication component 903 are connected through a bus.

[0121] In the specific implementation process, the at least one processor 23 executes the computer execution instructions stored in the memory 902, so that the at least one processor 23 executes the method described above.

[0122] The specific implementation process of the processor 23 can refer to the method embodiment described above, and has similar implementation principles and technical effects, which will not be described here again in the embodiment.

[0123] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), etc. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the application can be directly embodied as hardware processor execution, or executed by a combination of hardware and software modules in the processor.

[0124] The memory can include a random access memory (RAM), and can also include a non-volatile memory (NVM), such as at least one disk memory.

[0125] The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus, an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application does not limit to only one bus or one type of bus.

[0126] The present application also provides a computer program product, comprising a computer program, which is executed by a processor to implement the above method.

[0127] The present application also provides a computer readable storage medium, which stores computer execution instructions, and when a processor executes the computer execution instructions, the above method is implemented.

[0128] The above readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0129] An example readable storage medium is coupled to the processor such that the processor can read information from the readable storage medium and can write information to the readable storage medium. Of course, the readable storage medium can also be a part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in the device.

[0130] The division of units is only a logical functional division, and in actual implementation, there can be another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0131] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0132] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0133] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the essential part or part of the technical solutions that make contributions to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0134] Those skilled in the art can understand that all or part of the steps of the foregoing method embodiments can be completed by relevant hardware of program instructions. The foregoing program can be stored in a computer readable storage medium. When the program is executed, the steps of the foregoing method embodiments are executed; and the foregoing storage medium includes various media capable of storing program codes, such as ROM, RAM, magnetic disks, or optical disks.

[0135] Finally, it should be noted that other embodiments of the present application will become readily apparent to those skilled in the art from the disclosure herein, wherein the present application is intended to be limited only by the scope of the appended claims, rather than the foregoing description.

Claims

1. A diaphragm detection device, characterized by, The application relates to an abnormality detection device for a film sheet, comprising the following steps: a light emitting device is electrically connected to a processor and used for emitting detection light to the film sheet so that the film sheet reflects the detection light to form reflected light; a light receiving device is electrically connected to the processor and used for receiving the reflected light and sending the reflected light to the processor; the processor is electrically connected to the abnormality detection device and used for determining a detection voltage corresponding to the film sheet based on the reflected light and sending the detection voltage to the abnormality detection device; the abnormality detection device is used for applying voltage to the film sheet according to the detection voltage, measuring the resistance of the film sheet and sending the resistance to the processor, and triggering the processor to determine whether the film sheet is abnormal based on the resistance.

2. The membrane detection device of claim 1, wherein, The application further comprises a light shielding device, and the light emitting device and the light receiving device are arranged in the light shielding device.

3. The membrane detection device according to any one of claims 1-2, wherein, The abnormality detection device comprises: a clamping device, wherein a film containing gap is formed in the clamping device and used for placing the film sheet; a voltage source, which is electrically connected to the clamping device and the processor, is used for receiving the detection voltage sent by the processor and applying the detection voltage to the film sheet through the clamping device when the film sheet exists in the film containing gap; a resistance detection device, which is arranged on the clamping device, is used for detecting the resistance of a target position, which is the position where the film sheet contacts the clamping device.

4. The membrane detection apparatus of claim 3, wherein The clamping device comprises: an upper roller and a lower roller arranged in an up-down mode and connected to the voltage source, wherein the main body of the upper roller and the main body of the lower roller are made of elastic material, and the surface of the upper roller and the surface of the lower roller are covered with conductive material.

5. The membrane detection apparatus of claim 3, wherein The application further comprises: an adjusting mechanism arranged on the clamping device and used for adjusting the size of the film containing gap.

6. The membrane detection device according to any one of claims 1 to 5, characterized in that The application further comprises: a display device electrically connected to the abnormality detection device and used for displaying the resistance of the film sheet.

7. A detection method based on the diaphragm detection apparatus according to any one of claims 1 to 6, characterized by, The application comprises the following steps: controlling the light emitting device to emit detection light to the film sheet so that the film sheet reflects the detection light to form reflected light; controlling the light receiving device to receive the reflected light; determining a detection voltage corresponding to the film sheet based on the reflected light; controlling the abnormality detection device to apply voltage to the film sheet according to the detection voltage so as to obtain the resistance of the film sheet; determining whether the film sheet is abnormal based on the resistance.

8. The detection method according to claim 7, characterized in that, Determining a detection voltage corresponding to the film sheet based on the reflected light comprises the following steps: obtaining the reflected light intensity of the reflected light and the detection light intensity of the detection light; obtaining the reflectivity of the film sheet by dividing the reflected light intensity by the detection light intensity; determining the material of the film sheet according to the reflectivity; determining the detection voltage corresponding to the film sheet based on the material of the film sheet.

9. The detection method according to claim 7, characterized in that, Controlling the abnormality detection device to apply voltage to the film sheet according to the detection voltage so as to obtain the resistance of the film sheet comprises the following steps: if the film containing gap of the clamping device contains the film sheet, then triggering the voltage source to apply the detection voltage to the film sheet according to the detection voltage and controlling the film sheet to move in the film containing gap. acquire a resistance of a target position; the target position is a position where the diaphragm contacts the clamping device.

10. The detection method according to claim 9, characterized in that, determine whether the diaphragm is abnormal based on the resistance, comprising: determine whether the resistance of the target position is greater than a first preset resistance threshold and less than a second preset resistance threshold; if the resistance of the target position is less than the first preset resistance threshold or greater than the second preset resistance threshold, determine that the target position is abnormal.

11. An electronic device, comprising: comprising: a memory, a processor; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, so that the processor executes the method according to any one of claims 7-10.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to implement the method according to any one of claims 7-10.

13. A computer program product, characterised in that, comprising a computer program, which, when executed by the processor, implements the method according to any one of claims 7-10.

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