Battery film defect testing device

Abstract

The utility model discloses a battery film defect testing device which comprises a machine body, a conveying roller set, a conductive testing mechanism and a power supply loop assembly, the conveying roller set is installed on the machine body, and a conveying path suitable for conveying a battery film is arranged on the conveying roller set; the conductive testing mechanism comprises a conductive roller which is rotatably installed on the machine body and located on the conveying path, and the outer circle of the conductive roller is suitable for making contact with one side of the battery film. A flexible electrode mounting shaft, wherein the flexible electrode mounting shaft is rotatably mounted on the machine body; a flexible electrode material is arranged on the flexible electrode mounting shaft, is arranged opposite to the conductive roller and is in contact with the other side of the battery film; and the flexible electrode mounting shaft is suitable for driving the flexible electrode material to be in contact with the battery film. According to the utility model, the defects of the battery film can be detected, and the device can adapt to different battery films.

Description

Technical Field

[0001] The utility model relates to a battery film defect testing device, belonging to the technical field of battery film detection. Background Art

[0002] During the production process of battery films, various defects may occur due to the quality of raw materials, the control of production processes, and the influence of external environments. These defects will affect the physical properties and service life of battery films.

[0003] After retrieving the prior art, it is found that a Chinese patent with the publication number CN102539482B discloses a microcurrent detection system for micropore defects of transparent films. This patent realizes film defect detection. However, during use, it is found that since the film to be detected needs to be tightly squeezed between the rigid conductor I and the rigid conductor II, and the positions of the rigid conductor I and the rigid conductor II are fixed, it is not easy to adapt to different film thicknesses, and it is inconvenient to use. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a battery film defect testing device, which can detect the defects of battery films, can adapt to different battery films, and is convenient to use.

[0005] To solve the above technical problem, the technical solution of the utility model is: a battery film defect testing device, comprising:

[0006] A machine body;

[0007] A conveying roller group, the conveying roller group is installed on the machine body, and a conveying path suitable for conveying battery films is provided on the conveying roller group;

[0008] A conductive testing mechanism, the conductive testing mechanism includes:

[0009] A conductive roller, the conductive roller is rotatably installed on the machine body, the conductive roller is located on the conveying path, and the outer circle of the conductive roller (15) is suitable for contacting one side of the battery film;

[0010] A flexible electrode mounting shaft, the flexible electrode mounting shaft is installed on the machine body;

[0011] Flexible electrode material is provided on the flexible electrode mounting shaft, the flexible electrode material is arranged opposite to the conductive roller, and contacts the other side of the battery film;

[0012] A power supply circuit assembly, which is electrically connected to the conductive roller and the flexible electrode material. A current sampling device is provided in the power supply circuit assembly, and the current sampling device is adapted to sample and monitor the leakage current in the power supply circuit assembly.

[0013] Furthermore, a specific structure of the power supply circuit assembly is provided. The power supply circuit assembly includes a power source;

[0014] The power source has two terminals, namely the positive terminal and the negative terminal. The positive terminal is electrically connected to the flexible electrode material through the flexible electrode mounting shaft, and the negative terminal is connected to the current sampling device and then electrically connected to the conductive roller.

[0015] Furthermore, in order to facilitate the control switch, the battery film defect testing device further includes a power switch, which is installed on the body, and the power switch is connected in series to the power source;

[0016] The power switch is adapted to turn on the power source after being pressed.

[0017] Furthermore, in order to improve the protection, the battery film defect testing device further includes a test protection door. An operation opening is provided on the body, and the test protection door is movably installed on the body. The test protection door is adapted to close or open the operation opening of the body by being actuated.

[0018] Furthermore, in order to fully ensure the safety of the operator and the equipment, the battery film defect testing device further includes a proximity switch. The proximity switch has a sensing end and a wiring end. The sensing end of the proximity switch is installed on the test protection door or the body and is adapted to detect the opening and closing state of the test protection door. The wiring end of the proximity switch is connected to the circuit of the power source. The proximity switch is adapted to disconnect the power supply to the conductive roller and the flexible electrode material when the sensing end detects that the test protection door is opened.

[0019] Furthermore, a specific type of the test protection door is provided. The test protection door includes an upward-opening door and a side-opening door;

[0020] The upward-opening door and the side-opening door are hinged to the body.

[0021] Furthermore, the battery film defect testing device further includes an emergency stop switch, which is installed on the body. The emergency stop switch has a wiring end, and the wiring end is connected in series to the circuit of the power source;

[0022] The emergency stop switch is adapted to disconnect the power source after being actuated.

[0023] Furthermore, a specific type of the conveying roller group is provided. The conveying roller group includes:

[0024] A unwind roller, which is rotatably mounted on the body, and a battery film to be tested is wound on the unwind roller;

[0025] A windup roller, which is rotatably mounted on the body, and is adapted to wind up the tested battery film;

[0026] Wherein, the unwind roller and the windup roller are arranged in sequence along the conveying direction of the conveying path, and the unwind roller and the windup roller jointly constitute the conveying path.

[0027] Furthermore, the battery film defect testing device further includes a control screen and a controller, and the controller is connected to the current sampling device;

[0028] The control screen is connected to the controller;

[0029] The control screen is adapted to display, through the controller, the data of the leakage current sampled and monitored by the current sampling device.

[0030] Furthermore, for the convenience of movement, the battery film defect testing device further includes at least three rollers, which are mounted at the bottom of the body and are adapted to drive the body to move.

[0031] By adopting the above technical solutions, the utility model has the following beneficial effects:

[0032] In the utility model, the battery film to be tested is first arranged at the starting point of the conveying roller group and is conveyed through the conveying path of the conveying roller group. On the conveying path, a part of one side of the battery film is wound around the conductive roller, and the other side of the battery film is in contact with the flexible electrode material on the flexible electrode mounting shaft. Then, the power supply circuit component supplies power to the conductive roller and the flexible electrode material, and the leakage current is sampled and monitored by the current sampling device. By monitoring the change of the leakage current, whether there are defects in the battery film can be accurately detected, thus realizing the detection of battery film defects.

[0033] In addition, a power switch and a proximity switch are mounted on the body, which facilitates the operation and safety control of the equipment. When the test protection door is opened, the proximity switch can automatically cut off the power supply to ensure the safety of the operator and the equipment. The emergency stop switch can quickly cut off the power supply in case of an emergency to ensure safety. The installation of the control screen and the controller enables the detected data to be displayed and monitored in real time. The setting of the rollers facilitates the movement and placement of the equipment, and further improves the safety and convenience of the device.

[0034] To sum up, the utility model realizes the detection of battery film defects and can adapt to different battery films. At the same time, through the overall consideration of the operation safety of the device, the safety of the operator and the equipment is ensured, and the reliability is greatly improved. Description of the Drawings

[0035] Figure 1 FIG. 1 is a schematic perspective view of a battery film defect testing device of the present utility model;

[0036] Figure 2 FIG. 2 is a schematic internal structure view of a battery film defect testing device of the present utility model. Detailed Embodiment

[0037] In order to make the content of the present utility model more clearly understood, the present utility model will be further described in detail below according to specific embodiments in conjunction with the drawings.

[0038] As shown in Figure 1-2 FIG. 3, a battery film defect testing device includes:

[0039] A machine body 1;

[0040] A conveying roller group is installed on the machine body 1, and a conveying path adapted to convey a battery film is provided on the conveying roller group;

[0041] A conductive testing mechanism, the conductive testing mechanism can be of the following structure, including:

[0042] A conductive roller 15 is rotatably installed on the machine body 1, the conductive roller 15 is located on the conveying path, and one side of the outer circumference of the conductive roller 15 is adapted to contact one side of the battery film;

[0043] A flexible electrode mounting shaft 13 is installed on the machine body 1, a flexible electrode material 14 is provided on the flexible electrode mounting shaft 13, the flexible electrode material 14 is disposed opposite to the conductive roller 15 and contacts the other side of the battery film;

[0044] A power supply circuit assembly is electrically connected to the conductive roller 15 and the flexible electrode material 14, and a current sampling device is provided in the power supply circuit assembly, and the current sampling device is adapted to sample and monitor the leakage current in the power supply circuit assembly.

[0045] In this embodiment, as shown in Figure 1-2 FIG. 4, in use, the battery film to be tested is first set at the starting point of the conveying roller group and conveyed through the conveying path of the conveying roller group. On the conveying path, a part of one side of the battery film is wound around the conductive roller 15, and the other side of the battery film contacts the flexible electrode material 14 on the flexible electrode mounting shaft 13. Then, the power supply circuit assembly energizes the conductive roller 15 and the flexible electrode material 14, and the leakage current is sampled and monitored by the current sampling device. By monitoring the change of the leakage current, it can be accurately detected whether there are defects in the battery film, thus realizing the detection of battery film defects.

[0046] During the test, an electrical weakness test is performed on the battery film using a conductive test mechanism, and the presence of defects in the battery film is judged by monitoring the leakage current. Among them, the positive pole of the DC voltage in the power supply loop component is electrically connected to the flexible electrode mounting shaft 13, and the negative pole of the DC voltage in the conductive power supply loop component is connected to the current sampling device and then electrically connected to the conductive roller 1. The current sampling device monitors the leakage current in real time. If there are defects in the battery film, it will cause an increase in the leakage current, which can then be detected.

[0047] To improve the accuracy and reliability of the test, the flexible electrode material 14 and the conductive roller 15 form a pressing device for the battery film, and the flexible electrode material 14 is driven by the flexible electrode mounting shaft 13 to maintain contact with the battery film. For different types or thicknesses of battery films, different adjustable pressures and voltage outputs can be designed to meet the test requirements of different materials.

[0048] The flexible electrode mounting shaft 13 is also made of a conductive material, and the power supply loop component can also supply power to the flexible electrode material 14 indirectly by connecting to the flexible electrode mounting shaft 13.

[0049] Specifically, the flexible electrode mounting shaft 13 can be an installation shaft made of conductive rubber, the flexible electrode material 14 can also be conductive rubber specifically, and the conductive roller 15 can be a copper roller.

[0050] In addition, the power supply loop component is also provided with ground protection.

[0051] Specifically, as Figure 2 shown, the power supply loop component includes a power supply;

[0052] The power supply has two terminals, which are the positive pole and the negative pole respectively. The positive pole is electrically connected to the flexible electrode material 14 through the flexible electrode mounting shaft 13, and the negative pole is electrically connected to the conductive roller 15 after being connected to the leakage current sampling resistor.

[0053] In this embodiment, as Figure 1-2 shown, the power supply is responsible for providing the voltage required for the test. The power supply passes through the two terminals of the positive pole and the negative pole onto the conductive roller 15 and the flexible electrode material 14, forming an electric field on both sides of the battery film. The leakage current sampling resistor is connected in series in the negative pole circuit, enabling it to directly measure the current flowing through the battery film.

[0054] The current sampling device is a leakage current sampling resistor.

[0055] During the actual operation process, when the battery film passes through the test area, the power supply will apply a preset voltage. If the battery film is intact without defects, almost no current will pass through. However, if there are minor defects or pinholes in the battery film, a conductive channel will be formed at that location, resulting in an increase in the leakage current. The current sampling device can detect this minute current change in real time and transmit the data out.

[0056] A high-voltage interface 3 is also provided on the body 1, and the power supply is connected and energized through the high-voltage interface 3. In addition, there is a main switch 4, and the main switch 4 is used to control the overall power supply.

[0057] Specifically, as Figure 1 shown, the battery film defect testing device further includes a power switch 7. The power switch 7 is installed on the body 1, and the power switch 7 is connected in series to the power supply;

[0058] The power switch 7 is adapted to turn on the power supply after being pressed.

[0059] Specifically, as Figure 1 shown, the battery film defect testing device further includes an emergency stop switch 10. The emergency stop switch 10 is installed on the body 1, and the emergency stop switch 10 is provided with a terminal, and the terminal is connected in series to the return circuit of the power supply;

[0060] The emergency stop switch 10 is adapted to cut off the power supply after being actuated.

[0061] In this embodiment, as Figure 1 shown, the power switch 7 and the emergency stop switch 10 on the body 1 play a key role in terms of operation safety. The power switch 7 is installed on the body 1 to facilitate the operator to easily control the startup and shutdown of the device. When the operator is ready to start the test, just press the power switch 7 to turn on the power supply of the entire system and make the device enter the standby state. This design not only simplifies the operation process but also ensures that the device will not be accidentally powered on in the non-working state.

[0062] The emergency stop switch 10 is installed at an easily accessible position on the body 1, and the operator can quickly respond in case of an emergency. When detecting any abnormality or potential danger, the operator just needs to press the emergency stop switch 10 to immediately cut off the power supply of the entire system, effectively preventing the occurrence or expansion of an accident. This function is particularly important for testing the defects of battery films with high voltage, and can quickly cut off the power in case of an emergency to protect the operator and the device.

[0063] To further optimize the safety performance, an indicator light is added near the emergency stop switch 10, and different colors are used to indicate the working state of the device. For example, green indicates normal operation, and red indicates the emergency stop state.

[0064] Specifically, as Figure 1 shown, the battery film defect testing device further includes a test protection door 6. There is an operation port on the body 1, and the test protection door 6 is movably installed on the body 1. The test protection door 6 is adapted to close or open the operation port of the body 1 after being actuated.

[0065] Specifically, as Figure 1-2As shown, the battery film defect testing device further includes a proximity switch. The proximity switch is provided with an induction end and a wiring end. The induction end of the proximity switch is installed on the test protection door 6 or the body 1, and is adapted to detect the opening and closing state of the test protection door 6. The wiring end of the proximity switch is connected to the power supply loop. When the induction end of the proximity switch detects that the test protection door 6 is opened, the proximity switch is adapted to cut off the power supply to the conductive roller 15 and the flexible electrode material 14.

[0066] In this embodiment, as Figure 1-2 shown, the battery film defect testing device further includes a relay. The test protection door 6 is movably installed on the body 1, which can effectively enclose the test area, prevent the operator from accidentally contacting the charged parts or moving parts during the test, and at the same time can isolate the possible generated arcs or sparks, improving the safety of the test environment.

[0067] When the test protection door 6 is opened, the induction end of the proximity switch can immediately detect this state change and quickly cut off the power supply to the conductive roller 15 and the flexible electrode material 14 through the wiring end. This design ensures that the test system can only be powered on and operated when the test protection door 6 is completely closed, effectively reducing the operation risk.

[0068] To achieve this function, a relay can be used as an intermediate control element. When the proximity switch detects that the test protection door 6 is opened, it will trigger the relay to act and cut off the power supply loop. This design not only has a rapid response but also high reliability. At the same time, a door lock status indicator can be considered to be added on the control screen 2 so that the operator can know the opening and closing state of the test protection door 6 at any time.

[0069] Specifically, as Figure 1 shown, the test protection door 6 includes an upper hinged door and a side hinged door;

[0070] The upper hinged door and the side hinged door are hinged on the body 1.

[0071] In this embodiment, as Figure 1 shown, the test protection door 6 is designed with a combined structure of an upper hinged door and a side hinged door. The upper hinged door allows the operator to operate and observe from the top, which is suitable for daily inspection and debugging work. The side hinged door is convenient for the operator to approach the inside of the equipment from the side, facilitating more in-depth maintenance and component replacement. The combination of the two doors meets the requirements of different operation scenarios.

[0072] In addition, both the upper hinged door and the side hinged door are equipped with handles and locking mechanisms, which not only facilitate the opening and closing operations, but more importantly, ensure the reliable locking of the door in the closed state. The design of the locking mechanism can prevent the door from accidentally opening during the test, further enhancing the safety during equipment operation. It also helps to prevent unauthorized personnel from accessing the inside of the equipment, protecting the safety of the equipment and the test samples.

[0073] Specifically, as Figure 1-2 shown, the conveying roller group can have the following structure, including:

[0074] An unwinding roller 11, which is rotatably installed on the machine body 1, and a battery film to be tested is wound on the unwinding roller 11;

[0075] A winding roller 16, which is rotatably installed on the machine body 1, and the winding roller 16 is adapted to wind the tested battery film;

[0076] Among them, the unwinding roller 11 and the winding roller 16 are arranged in sequence along the conveying direction of the conveying path, and the unwinding roller 11 and the winding roller 16 together constitute the conveying path.

[0077] In this embodiment, as Figure 1-2 shown, the unwinding roller 11 is hingedly installed on the machine body 1, and is used to carry the roll of the battery film to be tested, ensuring that the battery film can be smoothly released. The winding roller 16 is also hinged on the machine body 1, located at the end of the conveying path, and is responsible for rewinding the tested battery film, ensuring the continuity of the test process and the orderly collection of the battery film.

[0078] In order to achieve precise control and stable operation, the conveying roller group is driven by a motor and controlled by an encoder. The motor can be respectively connected to the unwinding roller 11 and the winding roller 16, and through precise speed control, ensure that the battery film maintains a constant tension and speed throughout the test process. This not only helps to improve the accuracy of the test, but also prevents the battery film from wrinkling or being damaged during the conveying process.

[0079] The encoder obtains the test area of the tested battery film by the number of turns of rotation and the width of the tested battery film. There is also a forward rotation and reverse rotation button 8 on the machine body. After pressing the forward rotation and reverse rotation button 8, the motor switches its rotation direction.

[0080] Specifically, as Figure 1 shown, the battery film defect testing device further includes a control screen 2 and a controller. The control screen 2 is installed on the machine body 1;

[0081] The controller is connected to the current sampling device;

[0082] The control screen 2 is connected to the controller;

[0083] The control screen 2 is adapted to display the data of the leakage current sampled and monitored by the current sampling device through the controller.

[0084] In this embodiment, as Figure 1As shown, the controller can record the data of the collected leakage current, convert the analog signal into a digital signal, and transmit it to the control screen 2. The control screen 2 can display in real time during the test process, providing intuitive and accurate test results for the operator.

[0085] In addition, the controller can also be connected to the motor of the conveying roller group and the power supply, and display the voltage magnitude, test speed, etc. through the control screen 2. This greatly improves the convenience and efficiency of operation. The controller can specifically be a PLC or the like.

[0086] Specifically, as Figure 1 shown, the battery film defect testing device further includes three rollers 5. The rollers 5 are installed at the bottom of the machine body 1, and the rollers 5 are adapted to drive the machine body 1 to move.

[0087] Specifically, as Figure 1-2 shown, by installing three rollers 5 at the bottom of the machine body 1, the entire device can be easily moved within the factory workshop, greatly improving the convenience of using the equipment. The position can be quickly adjusted according to needs to adapt to different working environments and space limitations.

[0088] To increase safety, rollers 5 with a locking function can be considered, so that the device can be fixed after being in place to prevent accidental movement.

[0089] In some embodiments, the number of rollers 5 is not limited to three and can be set according to specific requirements.

[0090] In this embodiment, as Figure 1-2 shown, the battery film defect testing device further includes a tension adjustment roller group 12. The tension adjustment roller group 12 ensures the smooth conveyance of the battery film. The tension adjustment roller group 12 is located between the unwinding roller and the conductive roller. By adjusting the tension of the battery film, it ensures that the battery film maintains an appropriate tension during the test, avoiding situations of slack or excessive stretching, thereby improving the accuracy of the test.

[0091] The tension adjustment roller group 12 is provided with three driving rollers, and one of the driving rollers is movably installed on the machine body and is connected to an adjustable telescopic mechanism, allowing displacement in the vertical direction to adapt to changes in the tension of the battery film, greatly increasing the applicable range of the equipment.

[0092] On the machine body, there is also a unwind and rewind tension adjustment button 9. The unwind and rewind tension adjustment button 9 can adjust the speed of the motors of the unwind roller 11 and the rewind roller 16, or can also be adjusted through the tension adjustment roller group 12. The telescopic mechanism can be an electrically driven electric cylinder or a hydraulic cylinder, etc.

[0093] The specific embodiments described above further elaborate in detail on the technical problems solved, technical solutions, and beneficial effects of the present utility model. It should be understood that the above description is only for the specific embodiments of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery thin film defect testing device, characterized in that: include: Body (1); A conveying roller group, the conveying roller group is mounted on the machine body (1), and the conveying roller group is provided with a conveying path suitable for conveying the battery film; A conductive testing mechanism, the conductive testing mechanism comprising: A conductive roller (15), the conductive roller (15) being rotatably mounted on the machine body (1), the conductive roller (15) being located on the conveying path, and the outer circle of the conductive roller (15) being suitable for contacting one side of the battery film; A flexible electrode mounting shaft (13), wherein the flexible electrode mounting shaft (13) is mounted on the machine body (1); A flexible electrode material (14) is provided on the flexible electrode mounting shaft (13), and the flexible electrode material (14) is arranged opposite to the conductive roller (15) and is in contact with the other side of the battery film; A power supply circuit component is electrically connected to the conductive roller (15) and the flexible electrode material (14), and a current sampling device is provided in the power supply circuit component, and the current sampling device is suitable for sampling and monitoring leakage current in the power supply circuit component.

2. The battery thin film defect testing device according to claim 1, characterized in that: The power supply circuit assembly includes a power supply; The power source is provided with two terminals, which are respectively a positive electrode and a negative electrode. The positive electrode is electrically connected to the flexible electrode material (14) through the flexible electrode mounting shaft (13), and the negative electrode is electrically connected to the conductive roller (15) after being connected to the current sampling device.

3. The battery thin film defect testing device according to claim 2, characterized in that: It also includes a power switch (7), which is mounted on the machine body (1) and is connected in series to the power supply; The power switch (7) is suitable for switching on the power after being pressed.

4. The battery thin film defect testing device according to claim 2, characterized in that: It also comprises a test protection door (6), an operating opening is provided on the machine body (1), the test protection door (6) is movably mounted on the machine body (1), and the test protection door (6) is suitable for being moved to close or open the operating opening of the machine body (1).

5. The battery thin film defect testing device according to claim 4, characterized in that: The device also comprises a proximity switch, wherein the proximity switch is provided with a sensing end and a wiring end, the sensing end of the proximity switch is mounted on the test protection door (6) or the machine body (1), and is suitable for detecting the switch state of the test protection door (6), the wiring end of the proximity switch is connected to the circuit of the power supply, and the proximity switch is suitable for disconnecting the power supply to the conductive roller (15) and the flexible electrode material (14) when the sensing end detects that the test protection door (6) is opened.

6. The battery thin film defect testing device according to claim 4, characterized in that: The test protection door (6) comprises an upward-opening door and a side-opening door; The lift-up door and the side-opening door are hinged on the machine body (1).

7. The battery thin film defect testing device according to claim 2, characterized in that: It also includes an emergency stop switch (10), the emergency stop switch (10) is installed on the machine body (1), the emergency stop switch (10) is provided with a wiring terminal, and the wiring terminal is connected in series to the circuit of the power supply; The emergency stop switch (10) is suitable for disconnecting the power supply after being actuated.

8. The battery thin film defect testing device according to claim 1, characterized in that: The conveying roller set comprises: an unwinding roller (11), the unwinding roller (11) being rotatably mounted on the machine body (1), and the battery film to be tested being rolled up on the unwinding roller (11); A winding roller (16), the winding roller (16) being rotatably mounted on the machine body (1), the winding roller (16) being suitable for winding up the tested battery film; The unwinding roller (11) and the winding roller (16) are arranged in sequence along the conveying direction of the conveying path, and the unwinding roller (11) and the winding roller (16) together constitute the conveying path.

9. The battery thin film defect testing device according to claim 1, characterized in that: It also includes a control screen (2) and a controller, wherein the control screen (2) is mounted on the machine body (1); The controller is connected to the current sampling device; The control screen (2) is connected to the controller; The control screen (2) is suitable for displaying data of leakage current sampled and monitored by the current sampling device through the controller.

10. The battery thin film defect testing device according to claim 1, characterized in that: It also comprises at least three rollers (5), wherein the rollers (5) are mounted on the bottom of the machine body (1), and the rollers (5) are suitable for driving the machine body (1) to move.

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