Battery separator detection device, method and storage medium

Abstract

The present application discloses a detection device, method and storage medium for a battery isolation membrane. The detection device for the battery isolation membrane includes: a transmission unit, including a fixing mechanism and a winding mechanism, the fixing mechanism is used to connect one end of the isolation membrane to be detected; a detection unit, which is arranged between the fixing mechanism and the winding mechanism, and the other end of the isolation membrane is connected to the winding mechanism through the detection unit; the detection unit includes a power module, a detection simulation circuit and a data processing unit; the power module is used to power the detection simulation circuit; the detection simulation circuit is used to output a second voltage value when there is a puncture area in the isolation membrane, and send the second voltage value to the data processing unit; the data processing unit is used to determine that there is a puncture area in the isolation membrane when the voltage output by the detection simulation circuit is the second voltage value, and control the transmission unit to stop running. The embodiment of the present application can accurately determine the location of the punctured area in the isolation membrane of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a detection device, method and storage medium for a battery isolation membrane. Background Art

[0002] As a core component of new energy vehicles, the performance of the power battery system directly affects the performance of the entire vehicle. During the battery production process, magnetic substances may be mixed into the lithium battery slurry used to make lithium batteries due to factors such as incoming materials, equipment wear and tear, production environment, or personnel operation. If the magnetic particles are too large, they will pierce the isolation membrane of the battery, causing a short circuit between the positive and negative electrodes of the battery. In related technologies, visual screening is usually used to determine whether the isolation membrane of the battery is punctured. However, the above method is not only inefficient, but also unable to accurately determine the location of the punctured area in the isolation membrane.

[0003] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] In view of the above problems, the present application provides a battery isolation membrane detection device, method and storage medium, which can solve the technical problems in the related art of low efficiency in checking whether the battery isolation membrane has been punctured and inability to accurately locate the position of the punctured area.

[0005] In a first aspect, the present application provides a detection device for a battery isolation film, comprising: a transmission unit, comprising a fixing mechanism and a winding mechanism, wherein the fixing mechanism is used to connect one end of the isolation film to be detected;

[0006] A detection unit, wherein the detection unit is disposed between the fixing mechanism and the winding mechanism, and the other end of the isolation film is connected to the winding mechanism through the detection unit;

[0007] The detection unit is used to obtain voltage values ​​corresponding to different areas of the isolation membrane when the different areas pass through the detection unit, and determine whether there is a puncture area of ​​the isolation membrane according to the voltage value.

[0008] In the technical solution of the embodiment of the present invention, the isolation membrane to be inspected is transmitted to the detection unit for inspection through the isolation membrane transmission unit, and is rolled up after inspection. The isolation membrane is judged based on the detection unit whether there is a puncture area, and the position of the puncture area is determined when the isolation membrane has a puncture area, and the transmission unit is controlled to stop running. Compared with the method of manually inspecting the isolation membrane of the battery in the prior art, the present application is able to automatically transmit the isolation membrane to be inspected to the detection unit for puncture inspection, which significantly improves the efficiency of checking the isolation membrane of the battery for puncture. The detection unit can accurately locate the position of the puncture area, reduce potential safety risks or quality problems of the battery, effectively improve the quality control level of the battery isolation membrane, and reduce battery performance problems and safety risks caused by isolation membrane defects. It has small limitations and high universality.

[0009] In some embodiments, the fixing mechanism includes a unwinding roller, and the winding mechanism includes a winding roller; the unwinding roller is arranged on the side where the isolation film enters the detection unit, and the unwinding roller is used to connect one end of the isolation film and convey the isolation film to the detection unit; the winding roller is arranged on the side where the isolation film is conveyed out of the detection unit, and is used to connect the other end of the isolation film and wind up the isolation film.

[0010] In the embodiment of the present application, by arranging a unwinding roller and a winding roller in cooperation, the isolation membrane to be tested can be conveniently and quickly transferred to the detection unit for testing, which significantly improves the efficiency of checking whether the isolation membrane of the battery is punctured.

[0011] In some embodiments, the transmission unit further includes a transition roller, which is disposed between the detection unit and the winding roller, and the transition roller is drivingly connected to the isolation film for transmitting the isolation film from the detection unit to the winding roller.

[0012] In the embodiment of the present application, by setting a transition roller between the unwinding roller and the winding roller, it is possible to ensure that the isolation film moves smoothly and accurately on the detection line, and can also effectively prevent the isolation film from sagging or shifting, thereby greatly improving the efficiency of isolation film detection.

[0013] In some embodiments, the detection unit includes a power module, a detection simulation circuit and a data processing unit;

[0014] The power supply module is connected to the detection simulation circuit and is used to supply power to the detection simulation circuit;

[0015] The first connection end of the detection simulation circuit is connected to the first surface of the isolation membrane, and the second connection end of the detection simulation circuit is connected to the second surface of the isolation membrane;

[0016] The detection simulation circuit is used to output a first voltage value when there is no puncture area on the isolation film, and output a second voltage value when there is a puncture area on the isolation film, and send the first voltage value or the second voltage value to the data processing unit;

[0017] The data processing unit is electrically connected to the signal output end of the detection analog circuit, and is used to control the transmission unit to continue operating when the voltage output by the detection analog circuit is the first voltage value, and to determine that there is a puncture area in the isolation membrane and control the transmission unit to stop operating when the voltage output by the detection analog circuit is the second voltage value.

[0018] The embodiment of the present application cooperates by setting a power module, a detection analog circuit and a data processing unit to detect whether there is a puncture area on the isolation membrane. This can not only accurately locate the position of the puncture area, reduce potential safety risks or quality problems of the battery, but also further improve the production quality of the battery.

[0019] In some embodiments, the detection unit further includes an encoder;

[0020] The encoder is connected to the rotating shaft of the unwinding roller and / or the rotating shaft of the winding roller in the transmission unit, and the signal output end of the encoder is electrically connected to the data processing unit;

[0021] The encoder is used to detect the moving distance of the isolation film in real time and send a pulse signal corresponding to the moving distance to the data processing unit.

[0022] The embodiment of the present application acquires the moving distance of the isolation membrane in real time through an encoder, and accurately determines the location of the puncture area of ​​the isolation membrane according to the moving distance of the isolation membrane, which can significantly improve the efficiency of isolation membrane detection of the battery.

[0023] In some embodiments, the first connecting end includes a first conductive roller, the second connecting end includes a second conductive roller, and the detection simulation circuit also includes a conductive ring; the first conductive roller and the second conductive roller are respectively connected to the first conductive point and the second conductive point of the conductive ring; the third conductive point of the conductive ring is connected to the first branch of the detection simulation circuit, and the fourth conductive point of the conductive ring is connected to the second branch of the detection simulation circuit.

[0024] The embodiment of the present application can be used to detect the electrical insulation performance of the isolation membrane by setting the first conductive roller and the second conductive roller. By measuring the impedance of the material to the current, it can be accurately determined whether the isolation membrane is punctured. The conductive ring can reduce the torque generated by the rotation of the wire and prevent the wire from twisting or breaking. It can ensure that the transmission of current or signal is continuous when the conductive roller rotates, thereby improving the stability of the isolation membrane detection system.

[0025] In some embodiments, in the battery isolation film detection device, the surfaces of the first conductive roller and the second conductive roller include tungsten carbide coatings. In the embodiment of the present application, the tungsten carbide coatings are configured on the surfaces of the first conductive roller and the second conductive roller, which can improve the surface finish of the conductive roller parts while providing conductivity, thereby reducing damage to the isolation film during the detection process.

[0026] In a second aspect, the present application provides a method for detecting a battery separator, the method comprising:

[0027] Controlling the conveying unit to convey the isolation film to the detection unit;

[0028] Based on the detection unit detecting that there is a puncture area on the isolation film, controlling the conveying unit to stop running and determining the position of the puncture area;

[0029] Based on the detection by the detection unit that there is no pierced area of ​​the isolation film, the conveying unit is controlled to continue operating.

[0030] In the technical solution of the embodiment of the present invention, the isolation membrane to be detected is transmitted to the detection unit for detection through the isolation membrane transmission unit, and the voltage values ​​corresponding to the different areas are obtained based on the detection unit. It is determined whether there is a puncture area on the isolation membrane according to the voltage value. When there is a puncture area on the isolation membrane, the position of the puncture area is determined, and the transmission unit is controlled to stop running. The present application is able to automatically transmit the isolation membrane to be detected to the detection unit for puncture inspection, which significantly improves the efficiency of checking whether the isolation membrane of the battery has punctures. Based on the detection unit, the position of the puncture area can be accurately located, reducing the potential safety risks or quality problems of the battery, further improving the production quality of the battery, and has small limitations and high universality. In some embodiments, the control transmission unit transmits the isolation membrane to the detection unit, including:

[0031] Controlling the unwinding roller of the conveying unit to fix the isolation film and convey the isolation film to the detection unit;

[0032] The winding roller of the conveying unit is controlled to wind up the isolation film conveyed from the detection unit.

[0033] In the embodiment of the present application, the isolation film is fixed by the unwinding roller to ensure that the isolation film will not loosen or shift during the transmission process and can be smoothly transmitted to the detection unit. The setting of the winding roller allows the detection process of the isolation film to be carried out continuously without the need for frequent shutdowns for manual roll changing, thereby improving the detection and production efficiency of the isolation film.

[0034] In some embodiments, the battery isolation film detection method further includes:

[0035] Continuously acquiring voltage values ​​output by the detection analog circuit of the detection unit when the isolation film in different areas passes through the detection unit;

[0036] When the voltage value is the first voltage value, determining that there is no puncture area in the current detection area of ​​the isolation film;

[0037] When the voltage value is the second voltage value, it is determined that a puncture area exists in the current detection area of ​​the isolation film.

[0038] By analyzing the changes in the output voltage value of the analog circuit, the embodiment of the present application can accurately obtain the situation where the isolation membrane has punctured areas, thereby improving the accuracy and efficiency of isolation membrane detection. This effectively improves the quality control level of the battery isolation membrane and reduces battery performance problems and safety risks caused by isolation membrane defects.

[0039] In some embodiments, the battery isolation film detection method further includes:

[0040] Receiving a pulse signal sent by an encoder of a detection unit, and acquiring a moving distance of the isolation film according to the pulse signal;

[0041] The position of the puncture area of ​​the isolation film is determined according to the corresponding moving distance when the conveying unit stops running.

[0042] The embodiment of the present application uses an encoder to determine the corresponding moving distance when the transmission unit stops running, and uses this moving distance to determine the exact location of the puncture area on the isolation membrane, which can greatly improve the accuracy and automation level of battery isolation membrane detection, thereby improving the quality and safety of battery products.

[0043] In a third aspect, an embodiment of the present application further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for detecting a battery isolation membrane as described in the second aspect is implemented.

[0044] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery isolation membrane detection method as described in the second aspect is implemented.

[0045] In a fifth aspect, an embodiment of the present application further provides a computer program product, including a computer program, characterized in that the computer program is executed by a processor to implement the battery isolation membrane detection method as described in the first aspect.

[0046] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0048] Figure 1 A schematic diagram of the structure of a battery isolation film detection device provided in an embodiment of the present application;

[0049] Figure 2 A schematic structural diagram of another battery isolation film detection device provided in an embodiment of the present application;

[0050] Figure 3 A schematic structural diagram of another battery separator detection device provided in an embodiment of the present application;

[0051] Figure 4 A schematic structural diagram of another battery isolation film detection device provided in an embodiment of the present application;

[0052] Figure 5 A schematic structural diagram of another battery isolation film detection device provided in an embodiment of the present application;

[0053] Figure 6 A schematic structural diagram of another battery isolation membrane detection device provided in an embodiment of the present application;

[0054] Figure 7 It is a circuit diagram of a detection analog circuit in a detection device for a battery isolation membrane provided in an embodiment of the present application;

[0055] Figure 8 It is a circuit diagram of a detection analog circuit in another detection device for a battery isolation membrane provided in an embodiment of the present application;

[0056] Fig. 9 It is a flow chart of a method for detecting a battery isolation membrane provided in an embodiment of the present application;

[0057] Fig.10 is a flow chart of another method for detecting a battery isolation membrane provided in an embodiment of the present application;

[0058] Fig.11is a flow chart of another method for detecting a battery isolation membrane provided in an embodiment of the present application;

[0059] Fig.12 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0062] In the description of the embodiments of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0063] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0064] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0065] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] At present, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. In the fields of electric transportation supply, military equipment, aerospace and so on, batteries are usually used to provide power.

[0067] Among various types of power batteries, lithium batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields due to their advantages such as high power density, high energy density, long cycle life, high output voltage, and green environmental protection. As the core component of new energy vehicles, the performance of the power battery system directly affects the performance of the entire vehicle. How to ensure the quality of lithium batteries and reduce potential safety risks or quality problems in batteries is a hot topic in current research.

[0068] Lithium batteries include separators, which are microporous and porous films made mainly of polypropylene (PP) and polyethylene (PE), and are placed between the positive and negative electrodes inside the battery cell. They are mainly used to separate the positive and negative plates to prevent short circuits between the positive and negative electrodes inside the battery, allowing ions to pass through and retaining electrolyte. During the battery production process, magnetic substances may be mixed into the lithium slurry used to make lithium batteries due to factors such as incoming materials, equipment wear, production environment, or human operation. If the magnetic particles are too large, they will pierce the separator of the battery, causing a short circuit between the positive and negative electrodes of the battery.

[0069] Through in-depth analysis of the above-mentioned related technologies, it is found that using manual or visual technology to screen whether the battery's isolation membrane is punctured is not only inefficient, but also unable to accurately determine the location of the punctured area in the isolation membrane.

[0070] Based on the above problems existing in the related art, some embodiments of the present application propose a battery isolation film detection device, method and storage medium. The battery isolation film detection device includes: a transmission unit, including a fixing mechanism and a winding mechanism, wherein the fixing mechanism is used to connect one end of the isolation film to be detected;

[0071] A detection unit, wherein the detection unit is disposed between the fixing mechanism and the winding mechanism, and the other end of the isolation film is connected to the winding mechanism through the detection unit;

[0072] The detection unit is used to obtain voltage values ​​corresponding to different areas of the isolation membrane when the different areas pass through the detection unit, and determine whether there is a puncture area of ​​the isolation membrane according to the voltage value.

[0073] Compared with the method of manually inspecting the battery's isolation membrane in the prior art, the present application is able to automatically transmit the isolation membrane to be inspected to the inspection unit for puncture inspection, which significantly improves the efficiency of inspecting the battery's isolation membrane for puncture. The inspection unit can accurately locate the position of the puncture area, thereby reducing potential safety risks or quality problems in the battery, effectively improving the quality control level of the battery's isolation membrane, and reducing battery performance problems and safety risks caused by isolation membrane defects. It has few limitations and high universality.

[0074] The following describes in detail the battery separator detection device of the present application through specific embodiments. Figure 1 The structural diagram of the detection device of the battery isolation film shown in the figure, the detection device 1 of the battery isolation film includes a transmission unit 10 and a detection unit 20;

[0075] The conveying unit 10 includes a fixing mechanism 11 and a winding mechanism 12. The fixing mechanism 11 is used to connect one end of the isolation film to be detected, and the fixing mechanism 11 is used to fix the isolation film to be detected, and the winding mechanism 12 is used to wind up the isolation film to be detected.

[0076] The detection unit 20 is disposed between the fixing mechanism 11 and the winding mechanism 12, and the other end of the isolation film is connected to the winding mechanism 12 through the detection unit 20; the detection unit 20 is used to determine the position of the puncture area when there is a puncture area on the isolation film, and control the transmission unit 10 to stop running. Specifically, the present application can control the winding mechanism 12 to rotate to transmit the isolation film wound on the fixing mechanism 11 to the detection unit 20 for detection; or control the fixing mechanism 11 and the winding mechanism 12 to rotate synchronously to transmit the isolation film wound on the fixing mechanism 11 to the detection unit 20 for detection.

[0077] The detection unit 20 of the present application can be an analog detection circuit or an ultrasonic detection module. Specifically, the isolation membrane is detected by an analog detection circuit, and the resistance change of the isolation membrane in different areas is judged to determine whether there is a puncture area in the isolation membrane; or the ultrasonic detection module is used to analyze the reflected wave from the isolation membrane to detect whether there is a puncture area in the isolation membrane.

[0078] In the technical solution of the embodiment of the present invention, the isolation membrane to be inspected is transmitted to the detection unit 20 for inspection through the isolation membrane transmission unit 10, and is rolled up after inspection. Based on the detection unit 20, it is determined whether there is a puncture area in the isolation membrane. When the puncture area exists in the isolation membrane, the position of the puncture area is determined, and the transmission unit is controlled to stop running. Compared with the method of manually inspecting the isolation membrane of the battery in the prior art, the present application is able to automatically transmit the isolation membrane to be inspected to the detection unit for puncture inspection, which significantly improves the efficiency of checking the isolation membrane of the battery for puncture. Based on the detection unit, the position of the puncture area can be accurately located, reducing the potential safety risks or quality problems of the battery, effectively improving the quality control level of the battery isolation membrane, and reducing the battery performance problems and safety risks caused by isolation membrane defects. It has small limitations and high universality.

[0079] In one or more embodiments of the present application, Figure 2 and Figure 6 As shown, in the above-mentioned battery isolation film detection device 1, the fixing mechanism 11 includes a unwinding roller 110, and the winding mechanism 12 includes a winding roller 120;

[0080] The unwinding roller 110 is disposed on the side where the isolation film 7 to be detected enters the detection unit 20, and the unwinding roller 120 is used to connect one end of the isolation film 7 and transfer the isolation film 7 to the detection unit 20;

[0081] The winding roller 120 is disposed on one side of the detection unit 20 where the isolation film 7 is conveyed out, and is used to connect the other end of the isolation film 7 and wind up the isolation film 7 .

[0082] In the embodiment of the present application, by arranging the unwinding roller 110 and the winding roller 120 to cooperate with each other, the isolation membrane 7 to be tested can be conveniently and quickly transferred to the detection unit 20 for testing, which significantly improves the efficiency of checking whether the isolation membrane of the battery is punctured.

[0083] In one or more embodiments of the present application, Figure 3 and Figure 6 As shown, in the above-mentioned battery isolation film detection device 1, the transmission unit 10 also includes a transition roller 130, which is arranged between the detection unit 20 and the winding roller 120, and the transition roller 130 is connected to the isolation film 7 by transmission, and is used to transfer the isolation film 7 from the detection unit 20 to the winding roller 120. It should be noted that the transition roller 130 provided in the embodiment of the present application can be controlled to rotate by a motor, or can be driven to rotate only by the movement of the isolation film 7.

[0084] In the embodiment of the present application, by setting a transition roller 130 between the unwinding roller 110 and the winding roller 120, it can ensure that the isolation film 7 moves smoothly and accurately on the detection line, and can also effectively prevent the isolation film 7 from sagging or deflecting, thereby greatly improving the efficiency of isolation film detection.

[0085] In one or more embodiments of the present application, Figure 4 , Figure 6 and Figure 7 As shown, the detection unit 20 includes a power module 21, a detection simulation circuit 22 and a data processing unit 23; Figure 6 As shown, the power module 21, the detection simulation circuit 22 and the data processing unit 23 can be arranged in the electrical control box 6. In one example, the data processing unit 23 can be a programmable logic controller (PLC).

[0086] The power supply module 21 is connected to the detection analog circuit 22 and is used to supply power to the detection analog circuit 22;

[0087] The first connection terminal 221 of the detection simulation circuit 22 is connected to the first surface of the isolation membrane 7, and the second connection terminal 222 of the detection simulation circuit 22 is connected to the second surface of the isolation membrane 7; the resistance between the first connection terminal 221 and the second connection terminal 222 is the resistance corresponding to different areas of the isolation membrane 7 (isolation membrane resistance). It should be noted that, when the first surface of the isolation membrane 7 is the upper surface of the isolation membrane 7, the second surface is the lower surface of the isolation membrane; when the first surface of the isolation membrane 7 is the lower surface of the isolation membrane 7, the second surface is the upper surface of the isolation membrane.

[0088] The detection simulation circuit 22 is used to output a first voltage value when there is no puncture area on the isolation membrane 7 , and output a second voltage value when there is a puncture area on the isolation membrane 7 , and send the first voltage value or the second voltage value to the data processing unit 23 .

[0089] Specifically, Figure 7 As shown, Figure 7 What is shown is a circuit diagram of the detection simulation circuit 22, in which the power supply voltage (Volt Current Condenser, VCC) of the circuit is the voltage provided by the power module 21, the first connection terminal 221 of the detection simulation circuit 22 is connected to the first surface of the isolation membrane 7, and the second connection terminal 222 of the detection simulation circuit 22 is connected to the second surface of the isolation membrane 7, and the membrane resistance between the first connection terminal 221 and the second connection terminal 222 is the resistance of different areas of the isolation membrane 7 detected by the detection simulation circuit 22.

[0090] In one example, the above-mentioned VCC voltage value is 5V. When there is no puncture area in the isolation membrane 7, the isolation membrane in the unpunctured area is an insulator with infinite resistance. At this time, the VCC voltage is not divided on one side of the membrane resistance. The detection analog circuit 22 amplifies the input voltage of VCC to a first voltage value of 24V through the amplifier 224. At this time, the signal output end 223 of the detection analog circuit 22 outputs the first voltage value of 24V. In the case that there is a puncture area in the isolation membrane 7, the isolation membrane in the puncture area changes from an insulator to a conductor, and the resistance value of the membrane resistance changes. At this time, the VCC voltage is divided on one side of the membrane resistance. At this time, the signal output end 223 of the detection analog circuit 22 outputs a first voltage value of 5V, and the first voltage value 24V or the second voltage value 5V is sent to the data processing unit 23. The data processing unit 23 determines whether there is a puncture area in the isolation membrane 7 according to the voltage value output by the detection analog circuit 22.

[0091] The data processing unit 23 is electrically connected to the signal output end of the detection analog circuit 22, and is used to control the transmission unit 10 to continue to operate when the voltage output by the detection analog circuit 22 is the first voltage value, and to determine that there is a puncture area of ​​the isolation membrane when the voltage output by the detection analog circuit 22 is the second voltage value, and to control the transmission unit 10 to stop operating.

[0092] Specifically, combined Figure 6 and Figure 7 As shown, the data processing unit 23 is electrically connected to the signal output terminal 223 of the detection analog circuit 22. Assuming that the voltage value of VCC is 5V, when the voltage output by the detection analog circuit 22 is 24V, the transmission unit 10 is controlled to continue to operate. When the voltage output by the detection analog circuit 22 is 5V, it is determined that there is a puncture area in the isolation film, and the transmission unit 10 is controlled to stop operating. In one example, the data processing unit 23 can send a voice prompt indicating the presence of a puncture to prompt the user to mark the puncture area.

[0093] The embodiment of the present application cooperates with a power module 21, a detection analog circuit 22 and a data processing unit 23 to detect whether there is a puncture area on the isolation membrane. This can not only accurately locate the position of the puncture area, reduce potential safety risks or quality problems of the battery, but also further improve the production quality of the battery.

[0094] In some embodiments, Figure 5 As shown, the detection unit 20 further includes an encoder 24 .

[0095] The encoder 24 is connected to the rotating shaft of the unwinding roller 110 and / or the rotating shaft of the winding roller 120 in the transmission unit 10, and the signal output end of the encoder 24 is electrically connected to the data processing unit 22;

[0096] like Figure 7 As shown, the encoder 24 is used to detect the moving distance of the isolation film 7 in real time, and send a pulse signal corresponding to the moving distance to the data processing unit 23.

[0097] Specifically, combined Figure 2 and Figure 7 As shown, when the isolation film 7 moves on the unwinding roller 110 or the winding roller 120, the encoder 24 detects the rotation of the unwinding roller 110 or the winding roller 120 and generates corresponding pulse signals. These pulse signals are sent to the data processing unit 23, and the data processing unit 23 processes these pulse signals according to the preset program and logic to control the transmission speed and position of the isolation film 7. If the tension or speed of the isolation film needs to be adjusted, the data processing unit 23 can adjust the operating parameters of the motor to change the rotation speed of the unwinding roller 110 and / or the winding roller 120. In addition, the data processing unit 23 determines the moving distance of the isolation film 7 based on the pulse signal sent by the encoder 24, and the puncture area of ​​the isolation film 7 can be accurately determined based on the moving distance.

[0098] The embodiment of the present application acquires the moving distance of the isolation membrane in real time through an encoder, and accurately determines the location of the puncture area of ​​the isolation membrane according to the moving distance of the isolation membrane, which can significantly improve the efficiency of isolation membrane detection of the battery.

[0099] In some embodiments, in combination Figure 6 and Figure 8 As shown, the first connection end includes a first conductive roller 4, the second connection end includes a second conductive roller 5, and the detection simulation circuit also includes a conductive ring 2;

[0100] The first conductive roller 4 and the second conductive roller 5 are connected to the first conductive point and the second conductive point of the conductive ring 2 respectively; the first conductive point can be the positive electrode or the negative electrode of the conductive ring, and the first conductive point can also be the positive electrode or the negative electrode of the conductive ring.

[0101] The third conductive point of the conductive ring 2 is connected to the first branch of the detection analog circuit, and the fourth conductive point of the conductive ring 2 is connected to the second branch of the detection analog circuit.

[0102] Specifically, Figure 6As shown, the relative position between the first conductive roller 4 and the second conductive roller 5 is controlled by the cylinder 3, and the cylinder includes two cylinders parallel to each other. The distance between the first conductive roller 4 and the second conductive roller 5 can be stably adjusted by the movement of the two cylinders, so that the upper surface of the isolation film 7 contacts the first conductive roller 4, the lower surface of the isolation film 7 contacts the second conductive roller 5, and the isolation film 7 passes through the gap between the first conductive roller 4 and the second conductive roller 5 to reach the transition roller 130. In order to reduce the torsion generated by the rotation of the wire and prevent the wire from twisting or breaking, the first conductive roller 4 and the second conductive roller 5 are connected by setting a conductive ring 2. For example, the positive electrode of the conductive ring 2 can be connected to the first conductive roller 4, and the negative electrode of the conductive ring 2 can be connected to the second conductive roller 5, or the negative electrode of the conductive ring 2 can be connected to the first conductive roller 4, and the positive electrode of the conductive ring 2 can be connected to the second conductive roller 5.

[0103] The embodiment of the present application can be used to detect the electrical insulation performance of the isolation membrane 7 by setting the first conductive roller 4 and the second conductive roller 5. By measuring the impedance of the material to the current, it can be accurately determined whether the isolation membrane 7 is punctured. The conductive ring 2 can reduce the torque generated by the rotation of the wire and prevent the wire from twisting or breaking. It can ensure that the transmission of current or signal is continuous when the conductive roller rotates, thereby improving the stability of the isolation membrane detection system.

[0104] In some embodiments, in the battery separator detection device, the surfaces of the first conductive roller 4 and the second conductive roller 5 include tungsten carbide coatings. In the embodiment of the present application, the surfaces of the first conductive roller 4 and the second conductive roller 5 are provided with tungsten carbide coatings, which can improve the surface finish of the conductive roller parts while providing conductivity, thereby reducing damage to the separator during the detection process.

[0105] In one or more embodiments of the present application, the present application also provides a method for detecting a battery separator, such as Fig. 9 As shown, the above-mentioned battery isolation film detection method includes the following steps:

[0106] S902, controlling the transmission unit to transmit the isolation film to the detection unit;

[0107] S904, obtaining voltage values ​​corresponding to different regions of the isolation film, and determining whether there is a punctured region of the isolation film according to the voltage values;

[0108] S906, when it is determined that there is a puncture area on the isolation film, control the conveying unit to stop running, and determine the position of the puncture area;

[0109] S908, determining that there is no puncture area of ​​the isolation film, and controlling the transmission unit to continue operating.

[0110] Specifically, in an embodiment of the present application, the executor of the method may be a host computer or a data processing unit in a battery isolation film detection system. The following description will be given taking the data processing unit as an example. Specifically, the present application may control the rotation of the winding mechanism of the transmission unit to realize the transmission of the isolation film wrapped on the fixing mechanism of the transmission unit to the detection unit for detection; or control the synchronous rotation of the fixing mechanism and the winding mechanism to transmit the isolation film wrapped on the fixing mechanism to the detection unit for detection.

[0111] The present application controls the conveying unit to stop running when the detection unit detects that there is a puncture area on the isolation membrane, and when the conveying unit stops running, the position of the puncture area is determined by the position of the isolation membrane; when the detection unit detects that there is no puncture area on the isolation membrane, the conveying unit is controlled to continue running until the isolation membrane wrapped around the fixing mechanism has been completely detected by the detection unit.

[0112] In the technical solution of the embodiment of the present invention, the isolation membrane to be inspected is transmitted to the detection unit for inspection through the isolation membrane transmission unit, and is rolled up after inspection. The isolation membrane is judged based on the detection unit whether there is a puncture area, and the position of the puncture area is determined when the isolation membrane has a puncture area, and the transmission unit is controlled to stop running. Compared with the method of manually inspecting the isolation membrane of the battery in the prior art, the present application is able to automatically transmit the isolation membrane to be inspected to the detection unit for puncture inspection, which significantly improves the efficiency of checking the isolation membrane of the battery for puncture. The detection unit can accurately locate the position of the puncture area, reduce potential safety risks or quality problems of the battery, effectively improve the quality control level of the battery isolation membrane, and reduce battery performance problems and safety risks caused by isolation membrane defects. It has small limitations and high universality.

[0113] In some embodiments, the controlling the transmission unit to transmit the isolation film to the detection unit includes:

[0114] Controlling the unwinding roller of the conveying unit to fix the isolation film and convey the isolation film to the detection unit;

[0115] The winding roller of the conveying unit is controlled to wind up the isolation film conveyed from the detection unit.

[0116] In the embodiment of the present application, the isolation film is fixed by the unwinding roller to ensure that the isolation film will not loosen or shift during the transmission process and can be smoothly transmitted to the detection unit. The setting of the winding roller allows the detection process of the isolation film to be carried out continuously without the need for frequent shutdowns for manual roll changing, thereby improving the detection and production efficiency of the isolation film.

[0117] In some embodiments, obtaining voltage values ​​corresponding to different regions of the isolation film and determining whether there is a puncture region of the isolation film according to the voltage values ​​includes:

[0118] Continuously acquiring voltage values ​​output by the detection analog circuit of the detection unit when the isolation film in different areas passes through the detection unit;

[0119] When the voltage value is the first voltage value, determining that there is no puncture area in the current detection area of ​​the isolation film;

[0120] When the voltage value is the second voltage value, it is determined that a puncture area exists in the current detection area of ​​the isolation film.

[0121] Specifically, in one example, Figure 6 As shown, the VCC voltage value in the detection analog circuit of the detection unit is 5V. When there is no puncture area in the isolation membrane, the isolation membrane in the unpunctured area is an insulator with infinite resistance. At this time, the VCC voltage is not divided on one side of the membrane resistance. The detection analog circuit amplifies the input voltage of VCC to a first voltage value of 24V through an amplifier. At this time, the signal output terminal DO of the detection analog circuit outputs a first voltage value of 24V. The data processing unit determines that there is no puncture in the current area of ​​the isolation membrane according to the voltage value 24V output by the detection analog circuit.

[0122] When there is a puncture area in the isolation membrane, the isolation membrane in the puncture area changes from an insulator to a conductor, and the resistance value of the membrane resistor changes. At this time, one side of the membrane resistor divides the VCC voltage. At this time, the signal output terminal DO of the detection analog circuit outputs a first voltage value of 5V, and the first voltage value 24V or the second voltage value 5V is sent to the data processing unit. The data processing unit determines whether there is a puncture in the current area of ​​the isolation membrane according to the voltage value 5V output by the detection analog circuit.

[0123] By analyzing the changes in the output voltage value of the analog circuit, the embodiment of the present application can accurately obtain the situation where the isolation membrane has punctured areas, thereby improving the accuracy and efficiency of isolation membrane detection. This effectively improves the quality control level of the battery isolation membrane and reduces battery performance problems and safety risks caused by isolation membrane defects.

[0124] In some embodiments, determining the location of the puncture area comprises:

[0125] Receiving a pulse signal sent by an encoder of a detection unit, and acquiring a moving distance of the isolation film according to the pulse signal;

[0126] The position of the puncture area of ​​the isolation film is determined according to the corresponding moving distance when the conveying unit stops running.

[0127] Specifically, in an embodiment of the present application, the above-mentioned encoder can be an incremental encoder, which converts the displacement of the isolation membrane into a periodic electrical signal, and then converts the electrical signal into a counting pulse, and the number of pulses is used to represent the size of the displacement. When the isolation membrane moves on the unwinding roller or the winding roller, the encoder detects the rotation of the unwinding roller or the winding roller and generates a corresponding pulse signal. The data processing unit determines the moving distance of the isolation membrane based on the pulse signal sent by the encoder, and the puncture area of ​​the isolation membrane can be accurately determined based on the moving distance. In addition, the data processing unit receives the pulse signal and processes these pulse signals according to the preset program and logic to control the transmission speed and position of the isolation membrane. If the tension or speed of the isolation membrane needs to be adjusted, the data processing unit can adjust the operating parameters of the motor to change the rotation speed of the unwinding roller and / or the winding roller.

[0128] The embodiment of the present application uses an encoder to determine the corresponding moving distance when the transmission unit stops running, and uses this moving distance to determine the exact location of the puncture area on the isolation membrane, which can greatly improve the accuracy and automation level of battery isolation membrane detection, thereby improving the quality and safety of battery products.

[0129] In some embodiments, the method for determining the location of the puncture area of ​​the isolation membrane according to the movement distance of the isolation membrane when the transmission unit stops running further includes:

[0130] Acquire the starting position of the isolation film in the detection unit when the transmission unit starts to operate, and the corresponding moving distance of the isolation film when the transmission unit stops operating;

[0131] The position where the puncture area of ​​the isolation membrane exists is obtained according to the starting position and the corresponding moving distance of the isolation membrane when the conveying unit stops running.

[0132] Specifically, in an embodiment of the present application, for example, when the conveying unit starts running, the starting position of the isolation membrane at the detection unit is recorded as P1, and the moving distance S1 corresponding to the isolation membrane when the conveying unit stops running for the first time is obtained; then, it can be determined that the current position of the puncture area of ​​the isolation membrane is P1+S1; when the conveying unit continues to run, the moving distance S2 corresponding to the isolation membrane when it stops running for the second time is determined; then, it can be determined that the current position of the puncture area of ​​the isolation membrane is P1+S1+S2.

[0133] Based on the above embodiments, in one or more implementations of the present application, Figure 6 As shown, the above-mentioned battery isolation film detection device includes: a unwinding roller 110, which is used to fix the isolation film 7 and transfer the isolation film 7 to the winding roller 120;

[0134] Conductive ring 2: transmits line voltage to the first conductive roller 4 (upper conductive roller) and the second conductive roller 5 (lower conductive roller);

[0135] The cylinder 3 includes two cylinders parallel to each other, and is used to adjust the positions of the first conductive roller 4 and the second conductive roller 5;

[0136] The first conductive roller 4 and the second conductive roller 5: both are made of 304 stainless steel and tungsten carbide on the surface. The isolation membrane 7 is pre-tightened and the voltage value corresponding to the isolation membrane 7 is measured by powering on;

[0137] The transition roller 130 is used to support the isolation film 7 and maintain the stable operation of the isolation film;

[0138] A winding roller 120, used for conveying and collecting the isolation film 7;

[0139] Electrical control box 6, for users to electrically control the equipment in the battery isolation membrane detection device, which includes a power module, a detection simulation circuit, a data processing unit and an encoder, etc.;

[0140] In the embodiment of the present application, the isolation film 7 is fixed by the unwinding roller 110, and the winding roller 120 is operated to rewind and drive the transition roller 130 and the unwinding roller 110 to unwind. When the isolation film 7 passes through the first conductive roller 4 and the second conductive roller 5, the voltage signals corresponding to the isolation film in different areas are measured.

[0141] Based on the above embodiments, in one or more implementations of the present application, Fig.10 As shown, the above-mentioned battery separator detection method also includes:

[0142] S1. Control the data processing unit PLC in the battery separator detection to start.

[0143] S2. Fix the isolation film after disassembly of the battery cell to the unwinding roller, pass through the upper conductive roller and the lower conductive roller, and then fix it to the winding roller.

[0144] S3. Adjust the cylinder to adjust the positions of the upper conductive roller and the lower conductive roller, and press the upper conductive roller and the lower conductive roller against the isolation film.

[0145] S4. Energize the conductive ring electrically connected to the upper conductive roller and the lower conductive roller.

[0146] S5. Control the winding roller to rotate to drive the isolation film to be transmitted from the upper conductive roller and the lower conductive roller.

[0147] S6. After the conductive ring is powered on, it is determined whether the voltage outputted from the output terminal of the detection analog circuit changes. If it changes, step S6 is executed; if it does not change, step S7 is executed.

[0148] S6. Issue an alarm message indicating that the product is unqualified, control the winding roller to stop rotating, and stop testing the isolation film.

[0149] S7. Continue to test the barrier film.

[0150] Based on the above embodiments, in one or more implementations of the present application, Fig.11 As shown, the above-mentioned battery separator detection method also includes:

[0151] S1. The data processing unit PLC in the control battery separator detection is started.

[0152] S2. The upper conductive roller and the lower conductive roller are electrically connected and energized, and the voltage input for the energization is 5V.

[0153] S3. Filter the input voltage through the capacitor signal.

[0154] S4. Amplify the voltage after filtering through a signal amplifier, and obtain an amplified voltage of 24V.

[0155] S6. Determine whether the voltage of the analog circuit signal output changes; if the output voltage changes from 24V to 5V, it is determined that a change has occurred and step S6 is executed; if no change has occurred, step S8 is executed.

[0156] S6. Issue an alarm message indicating that the product is unqualified, control the winding roller to stop rotating, and stop testing the isolation film.

[0157] S7. When the detection of the isolation film is stopped, the corresponding area of ​​the isolation film is determined as an abnormal area, and the position of this area is recorded;

[0158] S8. Continue to test the barrier film.

[0159] The technical solution of the embodiment of the present invention is capable of automatically transmitting the isolation membrane to be inspected to the detection unit for puncture inspection, which significantly improves the efficiency of checking the isolation membrane of the battery for puncture. The detection unit can accurately locate the position of the puncture area, reduce the potential safety risks or quality problems of the battery, effectively improve the quality control level of the battery isolation membrane, and reduce battery performance problems and safety risks caused by isolation membrane defects. The embodiment of the present application can also be used for isolation membrane process monitoring in the fields of food, chemical industry, medicine, etc., with small limitations and high universality.

[0160] An embodiment of the present invention further provides a battery isolation film detection device, which is used to perform the battery isolation film detection device provided in the above embodiments, and includes:

[0161] A first control module, used for controlling the transmission unit to transmit the isolation film to the detection unit;

[0162] An acquisition module, used for acquiring voltage values ​​corresponding to different regions of the isolation film, and determining whether there is a puncture region of the isolation film according to the voltage values;

[0163] A second control module is used to determine that there is a puncture area on the isolation membrane, control the transmission unit to stop running, and determine the position of the puncture area;

[0164] The third control module is used to determine that there is no puncture area of ​​the isolation membrane and control the transmission unit to continue operating.

[0165] In the technical solution of the embodiment of the present invention, the isolation membrane to be inspected is transmitted to the detection unit for inspection through the isolation membrane transmission unit, and is rolled up after inspection. The isolation membrane is judged based on the detection unit whether there is a puncture area, and the position of the puncture area is determined when the isolation membrane has a puncture area, and the transmission unit is controlled to stop running. Compared with the method of manually inspecting the isolation membrane of the battery in the prior art, the present application is able to automatically transmit the isolation membrane to be inspected to the detection unit for puncture inspection, which significantly improves the efficiency of checking the isolation membrane of the battery for puncture. The detection unit can accurately locate the position of the puncture area, reduce potential safety risks or quality problems of the battery, effectively improve the quality control level of the battery isolation membrane, and reduce battery performance problems and safety risks caused by isolation membrane defects. It has small limitations and high universality.

[0166] In one or more embodiments of the present application, the first control module includes:

[0167] A control conveying unit is used to control an unwinding roller of the conveying unit to fix the isolation film and convey the isolation film to the detection unit;

[0168] A control unit is used to control the winding roller of the conveying unit to wind up the isolation film conveyed from the detection unit.

[0169] In one or more embodiments of the present application, the obtaining further includes:

[0170] An acquisition subunit, used for continuously acquiring voltage values ​​output by the detection analog circuit of the detection unit when the isolation membranes in different regions pass through the detection unit;

[0171] a first determining subunit, configured to determine, when the voltage value is a first voltage value, that there is no puncture area in the current detection area of ​​the isolation film;

[0172] The second determining subunit is used to determine that there is a puncture area in the current detection area of ​​the isolation film when the voltage value is a second voltage value.

[0173] In one or more embodiments of the present application, the second control module includes:

[0174] A receiving subunit, used for receiving a pulse signal sent by an encoder of the detection unit, and obtaining a moving distance of the isolation film according to the pulse signal;

[0175] The third determining subunit is used to determine the position of the puncture area of ​​the isolation membrane according to the corresponding moving distance when the conveying unit stops running.

[0176] In one or more implementations of the present application, the third determining subunit includes:

[0177] An acquisition submodule, used for acquiring the starting position of the isolation film in the detection unit when the transmission unit starts to operate, and the corresponding moving distance of the isolation film when the transmission unit stops operating;

[0178] The receiving submodule is used to obtain the position of the puncture area of ​​the isolation membrane according to the starting position and the corresponding moving distance of the isolation membrane when the transmission unit stops running.

[0179] Fig.12 The electronic device 1200 is a logical structure block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 1200 may be an electronic device such as a host computer, a data processing unit, a programmable logic controller, a motor controller, a domain controller, etc., which is arranged inside an electric device.

[0180] In an exemplary embodiment, a non-temporary computer-readable storage medium including instructions is also provided, such as a memory including instructions, and the above instructions can be executed by a battery processor to complete the above-mentioned battery isolation film detection method, the method comprising: controlling a transmission unit to transmit the isolation film to a detection unit; obtaining voltage values ​​corresponding to different regions of the isolation film, and determining whether there is a puncture area of ​​the isolation film according to the voltage value; determining that there is a puncture area of ​​the isolation film, controlling the transmission unit to stop running, and determining the position of the puncture area; determining that there is no puncture area of ​​the isolation film, and controlling the transmission unit to continue running. Optionally, the above instructions can also be executed by a processor of the battery to complete other steps involved in the above-mentioned exemplary embodiment. For example, the non-temporary computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0181] In an exemplary embodiment, an application / computer program product is also provided, including one or more instructions, which can be executed by a processor of a battery to complete the above-mentioned battery isolation film detection method, the method comprising: controlling a transmission unit to transmit the isolation film to a detection unit; obtaining voltage values ​​corresponding to different regions of the isolation film, and determining whether there is a puncture region of the isolation film according to the voltage value; determining that there is a puncture region of the isolation film, controlling the transmission unit to stop running, and determining the position of the puncture region; based on the detection unit detecting that there is no puncture region of the isolation film, controlling the transmission unit to continue running. Optionally, the above-mentioned instructions can also be executed by a processor of the battery to complete other steps involved in the above-mentioned exemplary embodiment. Fig.12 FIG. 1 is an example diagram of an electronic device 1200. A person skilled in the art can understand that Fig.12 It is only an example of electronic device 1100 and does not constitute a limitation of electronic device 1200. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, electronic device 1200 may also include input and output devices, network access devices, buses, etc.

[0182] The processor 1202 may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor 1202 may also be any conventional processor, etc. The processor 1202 is the control center of the electronic device 1100, and uses various interfaces and lines to connect various parts of the entire electronic device 1200.

[0183] The memory 1201 can be used to store computer-readable instructions. The processor 1202 implements various functions of the electronic device 1200 by running or executing the computer-readable instructions or modules stored in the memory 1201 and calling the data stored in the memory 1201. The memory 1201 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 1100, etc. In addition, the memory 1101 can include a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM) or other non-volatile / volatile storage devices.

[0184] If the module integrated in the electronic device 1200 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also instruct the relevant hardware to complete the computer-readable instructions through computer-readable instructions. The computer-readable instructions can be stored in a computer-readable storage medium, and when the computer-readable instructions are executed by the processor, the steps of the above-mentioned various method embodiments can be implemented.

[0185] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0186] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

[0187] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

Claims

1. A battery separator detection device, characterized in that: include: A conveying unit, comprising a fixing mechanism and a winding mechanism, wherein the fixing mechanism is used to connect one end of the isolation film to be detected; A detection unit, wherein the detection unit is disposed between the fixing mechanism and the winding mechanism, and the other end of the isolation film is connected to the winding mechanism through the detection unit; the detection unit comprises a power module, a detection simulation circuit and a data processing unit; The power module is connected to the detection simulation circuit and is used to supply power to the detection simulation circuit; the first connection end of the detection simulation circuit is connected to the first surface of the isolation membrane, and the second connection end of the detection simulation circuit is connected to the second surface of the isolation membrane; The detection simulation circuit is used to output a first voltage value when there is no puncture area on the isolation film, and send the first voltage value to the data processing unit; and outputting a second voltage value when there is a punctured area on the isolation film, and sending the second voltage value to the data processing unit; The data processing unit is electrically connected to the signal output end of the detection analog circuit, and is used to determine that there is a puncture area in the isolation membrane and control the transmission unit to stop running when the voltage output by the detection analog circuit is the second voltage value; and to control the transmission unit to continue running when the voltage output by the detection analog circuit is the first voltage value.

2. The device according to claim 1, characterized in that The fixing mechanism comprises an unwinding roller, and the rewinding mechanism comprises a rewinding roller; The unwinding roller is arranged at a side where the isolation film enters the detection unit, and the unwinding roller is used to connect one end of the isolation film and convey the isolation film to the detection unit; The winding roller is arranged on the side where the isolation film is transmitted out of the detection unit, and is used to connect the other end of the isolation film and wind up the isolation film.

3. The device according to claim 2, characterized in that The transmission unit further comprises a transition roller, which is arranged between the detection unit and the winding roller, and the transition roller is drivingly connected to the isolation film and is used to transmit the isolation film from the detection unit to the winding roller.

4. The device according to claim 1, characterized in that The detection unit also includes an encoder; The encoder is connected to the rotating shaft of the unwinding roller and / or the rotating shaft of the winding roller in the transmission unit, and the signal output end of the encoder is electrically connected to the data processing unit; The encoder is used to detect the moving distance of the isolation film in real time and send a pulse signal corresponding to the moving distance to the data processing unit.

5. The device according to claim 1, characterized in that The first connection end includes a first conductive roller, the second connection end includes a second conductive roller, and the detection simulation circuit also includes a conductive ring; The first conductive roller and the second conductive roller are connected to the first conductive point and the second conductive point of the conductive ring respectively; The third conductive point of the conductive ring is connected to the first branch of the detection analog circuit, and the fourth conductive point of the conductive ring is connected to the second branch of the detection analog circuit.

6. The device according to claim 5, characterized in that The surfaces of the first conductive roller and the second conductive roller include tungsten carbide coatings.

7. A method for detecting a battery separator according to the detection device according to any one of claims 1 to 6, characterized in that: The method comprises: Controlling the conveying unit to convey the isolation film to the detection unit; Continuously acquiring voltage values ​​output by the detection analog circuit of the detection unit when the isolation film in different areas passes through the detection unit; When the voltage value is the second voltage value, determining that there is a puncture area in the current detection area of ​​the isolation film, controlling the transmission unit to stop running, and determining the position of the puncture area; Determining that there is no puncture area of ​​the isolation membrane, and controlling the transmission unit to continue to operate; When the voltage value is the first voltage value, it is determined that there is no puncture area in the current detection area of ​​the isolation film.

8. The method according to claim 7, characterized in that The controlling and transmitting unit transmits the isolation film to the detection unit, including: Controlling the unwinding roller of the conveying unit to fix the isolation film and convey the isolation film to the detection unit; The winding roller of the conveying unit is controlled to wind up the isolation film conveyed from the detection unit.

9. The method according to claim 7 or 8, characterized in that: Determining the position of the piercing area comprises: Receiving a pulse signal sent by an encoder of a detection unit, and acquiring a moving distance of the isolation film according to the pulse signal; The position where the puncture area of ​​the isolation membrane exists is determined according to the corresponding moving distance of the isolation membrane when the conveying unit stops running.

10. The method according to claim 9, characterized in that The method for determining the location of the puncture area of ​​the isolation membrane according to the movement distance of the isolation membrane when the transmission unit stops running also includes: Acquire the starting position of the isolation film in the detection unit when the transmission unit starts to operate, and the corresponding moving distance of the isolation film when the transmission unit stops operating; The position where the puncture area of ​​the isolation membrane exists is obtained according to the starting position and the corresponding moving distance of the isolation membrane when the conveying unit stops running.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the method described in any one of claims 7 to 10 is executed when the program is executed.

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