Battery cell cover plate terminal pressure deformation monitoring device

Abstract

The utility model discloses a kind of battery cell cover plate terminal voltage withstand deformation monitoring equipment, belong to cover plate detection field.The device includes: equipment main body, support seat, pressing plate, displacement sensor and driving mechanism.The top surface of the support seat is concave to form pressure cavity at cover plate target detection position, the support seat is provided with inflation channel, the inflation channel one end is communicated with pressure cavity, other end is communicated with gas source;The pressing plate is detachably installed and connected with the support seat by fixing part, detection gap is provided on the pressing plate at the target detection position of cover plate;Using the detection equipment of the application, detection and measurement process after cover plate fixing, without manual operation;Using monitoring equipment and pressing equipment to detect cover plate terminal, data error is small, terminal can be monitored for a long time, data can be real-time, integrity, equipment does not need complex debugging, and can accurately reflect displacement change trend.

Description

Technical Field

[0001] This utility model relates to the field of cover plate testing, and in particular to a device for monitoring the voltage resistance deformation of battery cell cover plate terminals. Background Technology

[0002] The pressure resistance deformation of battery cell cover terminals refers to the ability of the metal terminals on the battery cover to resist plastic deformation or fracture when subjected to external mechanical pressure or long-term stress. Its performance directly affects the battery's sealing performance, electrical connection reliability, and safety. During battery manufacturing and use, terminals may be subjected to loads due to factors such as module assembly pressure, thermal stress during charging and discharging, or transportation vibration. Insufficient pressure resistance can lead to plastic deformation of the terminals, failure of the sealing rings, increased contact resistance between the terminals and the current collector, and even safety hazards such as electrolyte leakage, short circuits, or thermal runaway. Pressure resistance deformation performance is closely related to factors such as the terminal material (e.g., aluminum alloy, nickel-plated copper), structural design (e.g., reinforcing ribs, thickness), and processing technology (e.g., stamping, welding quality). Industry standards (e.g., GB / T 31485, UL 1642) typically require static or dynamic pressure tests on terminals (e.g., applying a certain rate of rated pressure and monitoring deformation) to ensure that they maintain functional integrity under extreme operating conditions.

[0003] In existing production processes, the pressure resistance deformation test for cover plate terminals is performed manually. Specifically, the product is pressurized with gas using a pressurizing device, and then the displacement at the target position is measured manually after pressurization. This method is prone to errors, requires highly skilled operators, cannot achieve stable measurements over long periods, has poor real-time data accuracy, and fails to reflect the terminal's displacement trend. Utility Model Content

[0004] This utility model provides a battery cell cover plate terminal withstand voltage deformation monitoring device, which can solve the problems of large errors in the manual inspection process of the cover plate in the prior art, high requirements for manual operation, inability to achieve stable measurement for a long time, poor real-time performance of the detection data, and inability to reflect the displacement trend of the terminal.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A battery cell cover plate terminal withstand voltage deformation monitoring device, comprising:

[0007] Equipment body;

[0008] The support base is fixedly installed on the main body of the equipment. The top surface of the support base is recessed to form a pressure chamber at the target detection position of the cover plate. An inflation channel is opened in the support base. One end of the inflation channel is connected to the pressure chamber and the other end is connected to the air source.

[0009] A pressure plate is detachably connected to the support base via a fastener, and a detection notch is provided on the pressure plate at the target detection position corresponding to the cover plate.

[0010] Displacement sensor, which is connected to the control system;

[0011] A drive mechanism, which is disposed on the main body of the device, is used to drive the displacement sensor to move closer to / away from the target detection position of the cover plate.

[0012] In one embodiment of this utility model: the main body of the device includes a fixedly connected base and a test platform, and the support base and drive mechanism are connected to the test platform.

[0013] In one embodiment of this utility model: the base is provided with a display touch screen, a power knob, an on / off button, and a pressure gauge connected to the control system.

[0014] In one embodiment of this utility model: the top surface of the support base is provided with a placement groove, and the placement groove is recessed at the target detection position of the cover plate to form a pressure chamber.

[0015] In one embodiment of this utility model: a contact ring is provided in the placement groove of the support base, and the contact ring surrounds and forms a pressure chamber.

[0016] In one embodiment of this utility model: an annular groove is provided on the outside of the contact ring, and a sealing ring is provided in the annular groove, wherein the diameter of the sealing ring is greater than the depth of the annular groove.

[0017] In one embodiment of this utility model: an avoidance notch is provided in the middle of the top surface of the support base.

[0018] In one embodiment of this utility model: the pressure plate is provided with clearance holes.

[0019] In one embodiment of this utility model: the driving mechanism includes a lifting driving structure, the lifting driving structure drives the connecting bracket, and the displacement sensor is installed on the bracket.

[0020] In one embodiment of this utility model: the driving mechanism further includes a slide rail and a slider, the slide rail is fixedly mounted on the main body of the device, and the lifting driving structure is fixedly mounted on the slider.

[0021] The battery cell cover plate terminal withstand voltage deformation monitoring device according to this utility model has at least one of the following technical effects:

[0022] Using the testing equipment of this application, the testing and measurement process after the cover plate is fixed is automated, eliminating the need for manual operation, inspection, and data measurement, thus reducing labor costs. The monitoring and pressure testing equipment is used to test the cover plate terminals, resulting in small data errors. It allows for continuous monitoring of the terminals over extended periods, providing real-time and complete data without requiring complex equipment adjustments, and accurately reflecting displacement trends. This addresses the problems of existing cover plate testing technologies, such as significant errors in manual inspection processes, high skill requirements, inability to achieve stable long-term measurements, poor real-time data, and inability to reflect terminal displacement trends. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood in conjunction with the following description of the embodiments with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Wherein:

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This utility model Figure 1 A schematic diagram of the structure in the front view;

[0026] Figure 3 This utility model Figure 1 A structural schematic diagram from the middle side view;

[0027] Figure 4 This utility model Figure 1 Mid-top view of the structure;

[0028] Figure 5 This utility model Figure 4 A schematic diagram of the cross-section at point AA;

[0029] Figure 6 This utility model Figure 5 A magnified structural diagram of part A in the middle;

[0030] Figure 7 This is a three-dimensional structural diagram of the support base in this utility model, wherein the sealing ring located at the contact ring position on the right side is not shown in the diagram.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Main body of the equipment; 2. Support base; 3. Air source; 4. Pressure plate; 5. Displacement sensor; 6. Contact ring; 7. Sealing ring; 8. Lifting drive structure; 9. Bracket; 10. Slide rail; 11. Slider. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] like Figure 1-7 As shown in the figure, this utility model provides a battery cell cover plate terminal pressure resistance deformation monitoring device, including a device body 1, a support base 2, a pressure plate 4, a displacement sensor 5, and a drive mechanism. The device body 1 serves as the main structure of the device, providing support and mounting positions for various components. Specifically, the device body 1 may include a fixedly connected base and a test platform. The base may house a control system, such as a control chip, controller, or PLC control system, for controlling the device. The base is equipped with a touchscreen display, a power knob, an on / off button, and a pressure gauge connected to the control system. The touchscreen display can show pressure data and displacement data in real time. The power knob and start button control the start and stop of the device or related structures. The pressure gauge displays the real-time status of the pressure chamber. The test platform serves as the testing surface, and the support base 2 and drive mechanism are connected to the test platform.

[0035] Please see Figure 1-7 In one embodiment of this utility model, the support base 2 is fixedly mounted on the device body 1. The top surface of the support base 2 is recessed to form a pressure chamber corresponding to the target detection position of the cover plate. An inflation channel is provided inside the support base 2. One end of the inflation channel is connected to the pressure chamber, and the other end is connected to the air source 3 through a pipeline. The pressure plate 4 is detachably mounted to the support base 2 through a fixing member. A detection notch is provided on the pressure plate corresponding to the target detection position of the cover plate. The displacement sensor 5 is connected to the control system and is used to detect the displacement of the cover plate terminal after inflation is completed. The driving mechanism is mounted on the device body 1 and is used to drive the displacement sensor 5 to move closer to / away from the target detection position of the cover plate.

[0036] Please see Figure 1-7In operation, this device first moves the displacement sensor 5 away from the area near the support base 2 via a drive mechanism to facilitate product placement. After removing the pressure plate 4, the product to be tested is placed on the support base 2, ensuring that the target detection position (i.e., the terminal of the cover plate to be tested) is aligned with the pressure chamber. Then, the pressure plate 4 is placed on top of the product and fixed to the support base 2, pressing the cover plate to be tested firmly. At this point, the target detection position of the cover plate closes the pressure chamber. Next, the displacement sensor 5 is moved by the drive mechanism, causing its detection probe to extend into the detection notch on the pressure plate 4 and contact the top surface of the target detection position on the cover plate. Then, according to the testing requirements, a certain amount of gas is introduced into the pressure chamber through the gas source 3, maintaining a certain pressure within the chamber. This gas pressure applies pressure to the target position of the cover plate, while the displacement sensor 5 detects the displacement of the target position. The detection data is uploaded to the control system and can also be displayed in real-time on a touchscreen. Furthermore, the detection data can be exported to generate a line graph showing the terminal surface displacement trend. The inflation and testing processes can be programmed and performed automatically under the control of the control system.

[0037] Please see Figure 1-7 In one embodiment of this utility model, a high-precision displacement sensor 5 is selected. As an example, there are two terminals on the cover plate; therefore, the displacement sensors 5 can be configured in two groups, each group used to detect one position. The number of sensors in each group can be multiple, used to detect different positions of the terminals. As an example, the number of displacement sensors 5 in the same group is three, each sensor is fixedly mounted on the bracket 9, with the probes of the three sensors at the lower end and at the same height for contacting the top surface of the cover plate terminals. Preferably, the multiple sensor probes are evenly spaced in a circle around the detection position to fully detect the displacement of the terminals.

[0038] Please see Figure 1-7 In one embodiment of this utility model, the top surface of the support base 2 may be provided with a placement groove, which is recessed at the target detection position of the cover plate to form a pressure chamber. The length and width of the placement groove are the same as the size of the cover plate to be tested, and the depth of the placement groove is the same as the thickness of the cover plate to be tested, or slightly smaller than the thickness of the cover plate. In this way, the cover plate can be placed in the placement groove, which plays a positioning role and also makes it more stable during the detection process.

[0039] Please see Figure 1-7In one embodiment of this utility model, a contact ring 6 can be provided in the placement groove of the support base 2. During use, the contact ring 6 surrounds the outer side of the cover plate to be tested, forming a pressure chamber. Furthermore, an annular groove is formed on the outside of the contact ring 6, and a sealing ring 7 is provided within the annular groove. The diameter of the sealing ring 7 is larger than the depth of the annular groove. Thus, the top of the sealing ring 7 can slightly extend beyond the top of the contact ring 6. After the cover plate is placed and fixed by the pressure plate 4, the sealing ring 7 can contact the bottom surface of the cover plate, ensuring a tight seal during the testing process. Furthermore, the bottom surface of the pressure plate 4 can protrude downwards in an annular shape corresponding to the outer side of the test position, effectively ensuring the pressing effect on the test position.

[0040] Please see Figure 1-7 In one embodiment of this utility model, the top surface of the support base 2 can be recessed to form a clearance notch, which can be used to avoid related component structures on the cover plate, and at the same time, facilitates the removal and placement of the cover plate. Similarly, the pressure plate 4 can be provided with clearance holes to avoid related component structures on the cover plate.

[0041] Please see Figure 1-7 In one embodiment of this utility model, the specific structure of the driving mechanism is not limited. As an example, the driving mechanism includes a lifting driving structure 8, which drives a connecting bracket 9. Multiple displacement sensors 5 are mounted on the bracket 9. The lifting driving structure 8 can be a cylinder structure. The cylinder body can be mounted on the main body 1 of the device, and the free end of its piston rod is used to drive the bracket 9 to move and lift. Alternatively, the bracket 9 can be mounted on the cylinder body, and the outer end of the cylinder piston rod can be mounted on the main body 1 of the device to achieve the lifting action of the cylinder body.

[0042] Please see Figure 1-7 In one embodiment of this utility model, the driving mechanism may further include a slide rail 10 and a slider 11. The slide rail 10 is fixedly mounted on the device body 1, and the slider 11 slides in cooperation with the slide rail 10. The lifting drive structure 8 is fixedly mounted on the slider 11. By providing the slide rail 10 and the slider 11, the support 9 can move up and down as well as laterally, allowing for better adjustment of the support 9's position. Furthermore, a linear drive mechanism may be provided to drive the slider 11 to move on the slide rail 10. The linear drive mechanism can be a linear motor, a cylinder, or others.

[0043] The working principle of this utility model:

[0044] When using this device, the displacement sensor 5 is first moved away from the area near the support base 2 by the drive mechanism to facilitate product placement. After removing the pressure plate 4, the product to be tested is placed on the support base 2, ensuring that the target detection position (i.e., the terminal of the cover plate to be tested) is aligned with the position of the pressure chamber. Then, the pressure plate 4 is placed on top of the product and fixed to the support base 2. The pressure plate 4 presses and fixes the cover plate to be tested, thus sealing the pressure chamber at the target detection position of the cover plate.

[0045] After selecting the appropriate testing program, click "Start" to begin operation. The drive mechanism moves displacement sensor 5, causing it to extend and the probe tip to contact the product surface. Then, the pressurization equipment is activated to maintain a certain air pressure. The controller reads the parameters of displacement sensor 5 in real time and displays the values ​​and time trend graph on the touchscreen. Each sensor has a corresponding curve display.

[0046] Using the testing equipment of this application, the testing and measurement process after the cover plate is fixed does not require manual operation, manual testing, or data measurement, thus reducing labor costs; the monitoring equipment and pressure testing equipment are used to test the cover plate terminals, resulting in small data errors, long-term monitoring of the terminals, real-time and complete data, and the equipment does not require complex debugging, and can accurately reflect the displacement change trend.

[0047] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

[0048] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An electrode core cover plate terminal pressure deformation monitoring device characterized by comprising: a pressure deformation monitoring device for an electrode core cover plate terminal. include: Equipment body; The support base is fixedly installed on the main body of the equipment. The top surface of the support base is recessed to form a pressure chamber at the target detection position of the cover plate. An inflation channel is opened in the support base. One end of the inflation channel is connected to the pressure chamber and the other end is connected to the air source. A pressure plate is detachably connected to the support base via a fastener, and a detection notch is provided on the pressure plate at the target detection position corresponding to the cover plate. Displacement sensor, which is connected to the control system; A drive mechanism, which is disposed on the main body of the device, is used to drive the displacement sensor to move closer to / away from the target detection position of the cover plate.

2. The terminal voltage deformation monitoring device for a cell cover plate according to claim 1, characterized by The main body of the equipment includes a fixedly connected base and a test platform, and the support base and drive mechanism are connected to the test platform.

3. The terminal voltage deformation monitoring device for a cell cover plate according to claim 2, characterized by The base is equipped with a touch screen, power knob, on / off button, and pressure gauge that are connected to the control system.

4. The terminal voltage deformation monitoring device for a cell cover plate according to claim 1, characterized by The top surface of the support base is provided with a placement groove, and the placement groove is recessed at the target detection position of the cover plate to form a pressure chamber.

5. The terminal voltage deformation monitoring device for a cell cover plate according to claim 4, characterized by A contact ring is provided in the placement groove of the support base, and the contact ring encloses to form a pressure chamber.

6. The terminal voltage deformation monitoring device for a cell cover plate according to claim 5, characterized by The contact ring has an outer groove, and a sealing ring is provided in the groove, with the diameter of the sealing ring being larger than the depth of the groove.

7. The terminal voltage deformation monitoring device for a cell cover plate according to claim 1, characterized by An avoidance notch is provided in the center of the top surface of the support base.

8. The terminal voltage deformation monitoring device for a cell cover plate according to claim 1, characterized by The pressure plate is provided with clearance holes.

9. The terminal voltage deformation monitoring device for a cell cover plate according to claim 1, characterized by The driving mechanism includes a lifting drive structure, which drives a connecting bracket, and the displacement sensor is mounted on the bracket.

10. The terminal voltage deformation monitoring device for a cell cover plate according to claim 9, characterized by The drive mechanism also includes a slide rail and a slider. The slide rail is fixedly mounted on the main body of the device, and the lifting drive structure is fixedly mounted on the slider.

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