New energy vehicle battery packaging steel strip size and tensile strength testing device

Abstract

This utility model relates to the field of battery steel strip testing technology, specifically a device and method for testing the dimensional tensile strength of steel strips used in new energy vehicle battery packaging. The device includes a frame, a fixed fixture, a transmission mechanism, a movable fixture, and a testing mechanism. The transmission mechanism is mounted on the frame and arranged along its length. The fixed fixture is located at one end of the frame, and the movable fixture is mounted on the transmission mechanism. The transmission mechanism drives the movable fixture to move relative to the fixed fixture. The testing mechanism is located on both sides of the frame and the transmission mechanism, and is used to test the tensile appearance of the battery packaging steel strip. The fixed fixture has a first positioning platform, and the movable fixture has a second positioning platform. This utility model integrates tensile strength, dimensional, and appearance testing functions, enabling comprehensive and efficient testing of new energy vehicle battery packaging steel strips, effectively ensuring the quality and safety of new energy vehicle batteries.

Description

Technical Field

[0001] This utility model relates to the field of battery steel strip testing technology, and in particular to a device and method for testing the size and tensile strength of steel strips used in new energy vehicle battery packaging. Background Technology

[0002] Against the backdrop of increasing environmental awareness and energy transition, new energy vehicles, with their significant advantages of low pollution and high efficiency, have become the main direction of global automotive industry development. As a core component of new energy vehicles, the performance and safety of the battery directly affect the overall quality and user experience. The steel strapping in the battery packaging plays a crucial role in the battery encapsulation process. It must not only ensure the battery's airtightness to prevent electrolyte leakage, but also possess sufficient strength and stability to protect the battery from damage under various complex operating environments.

[0003] To ensure the quality of the steel strip used in the packaging of new energy vehicle batteries meets requirements, a series of rigorous tests are required during its production process. Among these, tensile strength, appearance, and dimensional tests are the most critical. Tensile strength testing assesses the strength and toughness of the steel strip under external force, ensuring it will not break due to excessive tension in actual use. Appearance testing checks for defects such as scratches, cracks, and rust on the steel strip surface, preventing these defects from affecting its protective performance and aesthetics. Dimensional testing ensures that the width, thickness, length, and other dimensional parameters of the steel strip meet design standards, thereby ensuring a perfect fit between the steel strip and the battery.

[0004] However, current testing methods have serious drawbacks. Existing tensile, appearance, and dimensional tests are conducted separately, requiring independent equipment and procedures for each test. This means that the steel strip needs to be transferred multiple times between different testing stations throughout the production line, increasing material handling time and costs, and easily causing additional damage to the steel strip during transport, thus affecting the accuracy of the test results. Utility Model Content

[0005] To address the aforementioned issues, this invention integrates tensile, dimensional, and appearance inspection functions, enabling comprehensive and efficient testing of steel strips used in new energy vehicle battery packaging. It provides a device and method for testing the dimensions and tensile strength of steel strips used in new energy vehicle battery packaging, effectively ensuring the quality and safety of new energy vehicle batteries.

[0006] The technical solution adopted by this utility model is: a device for detecting the tensile strength of steel strip dimensions in new energy vehicle battery packaging, including a frame, a fixed fixture, a transmission mechanism, a movable fixture, and a detection mechanism. The transmission mechanism is mounted on the frame and arranged along the length of the frame. The fixed fixture is mounted at one end of the frame, and the movable fixture is mounted on the transmission mechanism. The transmission mechanism is used to drive the movable fixture to move relative to the fixed fixture. The detection mechanism is mounted on the frame and located on both sides of the transmission mechanism, and is used to detect the tensile appearance of the battery packaging steel strip. The fixed fixture is provided with a first positioning platform, and the movable fixture is provided with a second positioning platform. The battery packaging steel strip is a rectangular steel strip, with both ends connected by welding. The first positioning platform and the second positioning platform are respectively used for positioning both ends of the battery packaging steel strip. The first positioning platform and / or the second positioning platform are provided with tensile strength detection sensing elements to detect the tensile force generated by the transmission mechanism during the pulling process of the battery packaging steel strip.

[0007] A further improvement to the above solution is that the fixing fixture includes a side plate mounted on the frame and a support panel mounted on the side plate. The first positioning platform is mounted on the support panel, and a first positioning surface is provided on one side of the first positioning platform. The first positioning surface is used to fix one end of the battery packaging steel strip.

[0008] A further improvement to the above solution is that the first positioning stage includes a first positioning base plate and a first positioning block. The first positioning block is disposed on the first positioning base plate. The first positioning base plate is used for bottom support of the battery packaging steel strip. The first positioning surface is disposed on one side of the first positioning block.

[0009] A further improvement to the above solution is that the movable fixture includes a second positioning base plate and a second positioning block. The first positioning base plate is disposed on the transmission mechanism, and the second positioning block is disposed on the second positioning base plate. A second positioning surface is provided on one side of the second positioning block. The second positioning base plate is used for bottom support of the battery packaging steel strip. The second positioning surface and the first positioning surface are opposite to each other to form a rectangle.

[0010] A further improvement to the above solution is that the transmission mechanism includes a linear transmission module, the linear transmission module is provided with a transmission seat, the linear transmission module is used to drive the transmission seat in linear transmission, the linear transmission module is a linear motor module, and the movable fixture is disposed on the transmission seat.

[0011] A further improvement to the above solution is that the detection mechanism includes a detection bracket, a detection connecting rod, a detection adjustment seat, and a detection probe. The detection bracket is mounted on the frame, the detection connecting rod is mounted on the detection bracket, the detection adjustment seat is mounted on the detection connecting rod, and the detection probe is used to detect the tensile flatness of the battery packaging steel strip.

[0012] A further improvement to the above solution is that the detection mechanism is provided in multiple sets, each corresponding to a different position on the battery packaging steel strip.

[0013] A detection method based on a device for detecting the dimensional tensile strength of steel strips used in new energy vehicle battery packaging, characterized by the following steps:

[0014] Step S1, Positioning steel strip: Fix both ends of the rectangular battery packaging steel strip welded into a closed loop to the first positioning platform of the fixed fixture and the second positioning platform of the movable fixture, respectively.

[0015] Step S2, Apply tension: Drive the movable fixture to move away from the fixed fixture along the length of the frame through the transmission mechanism, and apply axial tensile force to the steel strip;

[0016] Step S3, Synchronous Detection: During the stretching process, the following parallel operations are performed:

[0017] Step 3.1: Monitor the tension value of the steel strip in real time by setting tension detection sensing elements on the first positioning platform and / or the second positioning platform;

[0018] Step 3.2: The steel strip surface is scanned at multiple positions by the detection mechanisms on both sides of the frame to obtain the dimensional change data and surface flatness data of the steel strip under tension.

[0019] Step S4, Output Results: Based on the monitoring data from step S3, generate reports on the steel strip's dimensional deformation, tensile strength, and appearance defects.

[0020] A further improvement to the above scheme is that the dimensional inspection in step 3.2 specifically includes: simultaneously measuring at least three equidistant positions in the width direction of the steel strip using an adjustable inspection probe; dynamically adjusting the probe height to adapt to the deformation surface of the steel strip according to the cooperation between the inspection linkage and the inspection adjustment seat; calculating the offset of each measurement point from the reference plane, and determining whether the transverse dimensional stability and flatness of the steel strip meet the standards.

[0021] A further improvement to the above scheme is that the tensile monitoring in step 3.1 includes: recording the real-time numerical change curve of the tensile detection sensing element during the uniform movement of the moving fixture driven by the transmission mechanism; triggering a system alarm when the tensile value reaches a preset threshold and recording the tensile displacement of the steel strip at this time; and calculating the elastic modulus and yield strength parameters of the steel strip by combining the displacement and the peak tensile force.

[0022] The beneficial effects of this utility model are:

[0023] Compared to existing battery packaging steel strip inspection methods, this invention achieves rigid clamping of the welded closed-loop rectangular battery packaging steel strip through a bidirectional positioning design of fixed and movable fixtures. This solves the problems of unstable positioning and easy slippage caused by the ring structure of the steel strip in traditional fixtures, ensuring precise alignment of the force axis during tensile testing. The integrated layout of the linear displacement of the movable fixture driven by the transmission mechanism and the tensile force detection sensing element enables in-situ real-time monitoring of tensile force data during the tensile process, avoiding measurement errors introduced by external sensors. Simultaneously, combined with the multi-position synchronous scanning of the steel strip surface by the detection mechanism, it achieves three-dimensional data collaborative acquisition of dimensional deformation, tensile strength, and appearance defects in a single test. Through the symmetrical distribution of the detection mechanism along both sides of the transmission mechanism and the adjustable probe design, it achieves full-range flatness monitoring of the steel strip in the width direction under dynamic tensile conditions, accurately capturing defects such as local warping and cracks, overcoming the blind spots of single-point detection, and ensuring reliable quality judgment. Through the high-precision displacement control of the linear motor module and the synergistic effect of the positioning stage, constant / variable speed tensile testing with micron-level displacement resolution was achieved. This can reproduce the fatigue response of battery packaging steel strip under actual working conditions, providing an industrial-grade verification environment for material mechanical property analysis.

[0024] In terms of tensile testing, the device drives a movable fixture to move relative to a fixed fixture via a transmission mechanism, applying tension to the battery packaging steel strip. Simultaneously, tensile testing sensors are installed on the first and / or second positioning platforms, enabling precise detection of the tensile force borne by the battery packaging steel strip during the pulling process. This helps to accurately assess the tensile strength of the battery packaging steel strip, ensuring that it can withstand normal stress without breaking during actual use of new energy vehicle batteries, thus guaranteeing the structural stability and safety of the battery.

[0025] In terms of dimensional inspection, the first and second positioning stages on the fixed and movable fixtures can accurately position the two ends of the rectangular battery packaging steel strip that are welded together at both ends. During tensile testing of the battery packaging steel strip, its dimensional changes during the stress process, such as elongation, can be simultaneously detected, thus determining whether the battery packaging steel strip meets the dimensional requirements for new energy vehicle battery packaging.

[0026] For appearance inspection, the inspection mechanism is set up on the frame and located on both sides of the transmission mechanism, allowing real-time monitoring of the stretched appearance of the battery packaging steel strip during the stretching process. This enables timely detection of appearance defects such as cracks and deformation in the battery packaging steel strip during stretching, preventing the use of battery packaging steel strips with appearance quality issues in new energy vehicle batteries, thus improving the overall quality and reliability of new energy vehicle batteries. This utility model integrates tensile, dimensional, and appearance inspection functions, enabling comprehensive and efficient testing of new energy vehicle battery packaging steel strips, effectively ensuring the quality and safety of new energy vehicle batteries.

[0027] The detection method based on the dimensional tensile testing device for steel strips used in new energy vehicle battery packaging achieves axial rigid fixation of the annular welded steel strip through a closed-loop synchronous positioning mechanism at both ends of the steel strip on fixed / movable fixtures. This eliminates stress concentration caused by traditional segmented clamping, ensuring that the tensile force is strictly transmitted along the length of the steel strip, thus improving the reliability of the test data. By employing a parallel working mode of the tensile sensing element and the surface detection mechanism, the method achieves coordinated capture of mechanical properties and deformation characteristics during a single tensile test, directly establishing a correlation model between tensile force, deformation, and surface defects. This solves the industry problem that traditional step-by-step testing cannot reflect dynamic deformation defects. Through data fusion of multi-position appearance scanning and real-time tensile monitoring, the method generates a comprehensive quality profile of the steel strip under tensile conditions: accurate dimensional change in the width direction, identification of surface flatness defects, and analysis of tensile strength. This upgrades the test results from "single-parameter judgment" to "multi-dimensional performance evaluation," directly outputting dimensional deformation, yield strength threshold, and defect distribution thermal properties. Figure 3 Heavy industry parameters improve the efficiency of quality decision-making.

[0028] In the steel strip positioning step, the two ends of the rectangular battery packaging steel strip, welded into a closed loop, are precisely fixed to the first positioning platform of the fixed fixture and the second positioning platform of the movable fixture. This precise positioning ensures uniform stress on the steel strip during subsequent tensile testing, avoiding testing errors caused by positioning deviations and allowing the test results to accurately reflect the actual performance of the battery packaging steel strip. The movable fixture is driven by a transmission mechanism to move away from the fixed fixture along the length of the frame, applying axial tensile force to the steel strip. This simulates the tensile stress experienced by the battery packaging steel strip during actual use, ensuring a comprehensive and accurate evaluation of its tensile performance. The stable and controllable tensile force application process helps to accurately determine the tensile strength of the steel strip, providing a reliable mechanical performance basis for the design and manufacturing of new energy vehicle battery packaging. Simultaneous detection during the tensile process allows for real-time monitoring of the tensile force value on the steel strip by tensile detection sensors installed on the first and / or second positioning platforms. This accurately captures changes in stress during the tensile process and promptly identifies potential strength problems. On the other hand, the steel strip surface is scanned from multiple positions by the inspection mechanisms on both sides of the frame to obtain data on dimensional changes and surface flatness under tension. This multi-dimensional synchronous inspection method can comprehensively evaluate the performance of the steel strip during the tensioning process. It can not only detect whether the strength of the steel strip meets the standard, but also detect whether there are appearance defects such as cracks and deformations on the surface of the steel strip, as well as whether the dimensional changes meet the design requirements, which greatly improves the comprehensiveness and accuracy of the inspection. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the new energy vehicle battery packaging steel strip size and tensile strength testing device of this utility model;

[0030] Figure 2 for Figure 1 A three-dimensional schematic diagram from another perspective of the steel strip dimensional tensile testing device for new energy vehicle battery packaging;

[0031] Figure 3 for Figure 1 A top view of a device for testing the dimensional tensile strength of steel strips used in the packaging of new energy vehicle batteries.

[0032] Figure 4 for Figure 1 A schematic diagram of part of the structure of the steel strip dimension and tensile strength testing device for new energy vehicle battery packaging.

[0033] Figure 5 for Figure 1 A three-dimensional schematic diagram of the testing mechanism for the steel strip dimension and tensile strength testing device for new energy vehicle battery packaging;

[0034] Figure 6 This is a flowchart illustrating the detection method of a utility model based on a device for detecting the dimensional tensile strength of steel strips used in new energy vehicle battery packaging.

[0035] Explanation of reference numerals in the attached drawings: Frame 1, Fixture 2, First positioning stage 21, First positioning surface 211, First positioning base plate 212, First positioning block 213, Side plate 22, Support panel 23, Transmission mechanism 3, Transmission seat 31, Movable fixture 4, Second positioning stage 41, Second positioning base plate 42, Second positioning block 43, Second positioning surface 431, Detection mechanism 5, Detection bracket 51, Detection connecting rod 52, Detection adjustment seat 53, Detection probe 54, Tension detection sensing element 6. Detailed Implementation

[0036] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-6 As shown, in one embodiment of this utility model, a device for detecting the tensile strength of a steel strip used in the packaging of new energy vehicle batteries is provided. The device includes a frame 1, a fixed fixture 2, a transmission mechanism 3, a movable fixture 4, and a detection mechanism 5. The transmission mechanism 3 is mounted on the frame 1 and arranged along its length. The fixed fixture 2 is located at one end of the frame 1, and the movable fixture 4 is mounted on the transmission mechanism 3. The transmission mechanism 3 drives the movable fixture 4 to move relative to the fixed fixture 2. The detection mechanism 5 is mounted on the frame 1 and located on both sides of the transmission mechanism 3, and is used to detect the tensile appearance of the battery packaging steel strip. The fixed fixture 2 is provided with a first positioning platform 21, and the movable fixture 4 is provided with a second positioning platform 41. The battery packaging steel strip is a rectangular steel strip, with both ends welded together. The first positioning platform 21 and the second positioning platform 41 are used to position the two ends of the battery packaging steel strip, respectively. Tensile strength detection sensing elements 6 are provided on the first positioning platform 21 and / or the second positioning platform 41 to detect the tensile force generated during the pulling process of the transmission mechanism 3 on the battery packaging steel strip. This embodiment achieves rigid clamping of the rectangular battery packaging steel strip welded into a closed loop through a bidirectional positioning design of the fixed fixture 2 and the movable fixture 4. This solves the problems of unstable positioning and easy slippage caused by the ring structure of the steel strip in traditional fixtures, ensuring precise alignment of the force axis during tensile testing. The integrated layout of the linear displacement of the movable fixture 4 driven by the transmission mechanism 3 and the tensile force detection sensing element 6 enables in-situ real-time monitoring of tensile force data during the tensile process, avoiding measurement errors introduced by external sensors. Simultaneously, combined with the multi-position synchronous scanning of the steel strip surface by the detection mechanism 5, it achieves three-dimensional data collaborative acquisition of dimensional deformation, tensile strength, and appearance defects in a single test. The symmetrical distribution of the detection mechanism 5 along both sides of the transmission mechanism 3 and the adjustable probe design enable full-range flatness monitoring of the steel strip in the width direction under dynamic tensile conditions, accurately capturing defects such as local warping and cracks, overcoming the blind spots of single-point detection, and ensuring reliable quality judgment. Through the high-precision displacement control of the linear motor module and the synergistic effect of the positioning stage, constant / variable speed tensile testing with micron-level displacement resolution was achieved. This can reproduce the fatigue response of battery packaging steel strip under actual working conditions, providing an industrial-grade verification environment for material mechanical property analysis.

[0039] In terms of tensile strength testing, the device drives the movable fixture 4 to move relative to the fixed fixture 2 via the transmission mechanism 3, applying tensile force to the battery packaging steel strip. Simultaneously, tensile strength detection sensors 6 are installed on the first positioning platform 21 and / or the second positioning platform 41, enabling precise detection of the tensile force borne by the battery packaging steel strip during the pulling process. This helps to accurately assess the tensile strength of the battery packaging steel strip, ensuring that it can withstand normal stress without breaking during actual use of new energy vehicle batteries, thus guaranteeing the structural stability and safety of the battery.

[0040] Regarding dimensional inspection, the first positioning platform 21 and the second positioning platform 41 on the fixed fixture 2 and the movable fixture 4 can accurately position the two ends of the rectangular battery packaging steel strip that are welded together at both ends. When performing tensile testing on the battery packaging steel strip, its dimensional changes during the stress process can be detected simultaneously, such as the elongation of length, thereby determining whether the battery packaging steel strip meets the dimensional requirements of new energy vehicle battery packaging.

[0041] For appearance inspection, the inspection mechanism 5 is set on the frame 1 and located on both sides of the transmission mechanism 3. It can monitor the stretched appearance of the battery packaging steel strip in real time during the stretching process. This allows for the timely detection of appearance defects such as cracks and deformation during the stretching process, preventing the use of battery packaging steel strips with appearance quality problems in new energy vehicle batteries, thus improving the overall quality and reliability of new energy vehicle batteries. This utility model integrates tensile, dimensional, and appearance inspection functions, enabling comprehensive and efficient testing of new energy vehicle battery packaging steel strips, effectively ensuring the quality and safety of new energy vehicle batteries.

[0042] The fixing fixture 2 includes a side plate 22 mounted on the frame 1 and a support panel 23 mounted on the side plate 22. A first positioning platform 21 is mounted on the support panel 23. A first positioning surface 211 is provided on one side of the first positioning platform 21, which is used to fix one end of the battery packaging steel strip. Specifically, the first positioning platform 21 includes a first positioning base plate 212 and a first positioning block 213. The first positioning block 213 is mounted on the first positioning base plate 212, which supports the bottom surface of the battery packaging steel strip. The first positioning surface 211 is located on one side of the first positioning block 213. The movable fixture 4 includes a second positioning base plate 42 and a second positioning block 43. The first positioning base plate 212 is mounted on the transmission mechanism 3, and the second positioning block 43 is mounted on the second positioning base plate 42. A second positioning surface 431 is provided on one side of the second positioning block 43. The second positioning base plate 42 supports the bottom surface of the battery packaging steel strip, and the second positioning surface 431 and the first positioning surface 211 form a rectangular shape. In this embodiment, the first positioning platform 21 of the fixed fixture 2 and the second positioning platform 41 of the movable fixture 4 can accurately position the battery packaging steel strip. The first positioning surface 211 of the first positioning platform 21 and the second positioning surface 431 of the second positioning block 43 of the movable fixture 4 form a rectangle, which is adapted to the rectangular shape of the battery packaging steel strip. The first positioning base plate 212 and the second positioning base plate 42 respectively support the bottom surface of the battery packaging steel strip. This ensures that the battery packaging steel strip is placed stably and accurately in the device before the test begins, ensuring the accuracy of the position of both ends of the steel strip when under force, avoiding test deviations caused by inaccurate positioning, and ensuring that the test results can truly reflect the tensile performance of the steel strip. The first positioning base plate 212 and the second positioning base plate 42 provide stable bottom surface support for both ends of the battery packaging steel strip. During the tensile test, the battery packaging steel strip will bear a large tensile force. Stable bottom surface support can prevent the steel strip from warping or shifting when under force, so that the steel strip maintains a stable posture throughout the tensile process. This helps ensure that the tension is applied evenly to the steel strip, avoiding localized stress concentration from interfering with the test results, thereby improving the reliability and repeatability of the test.

[0043] The transmission mechanism 3 includes a linear transmission module, which is equipped with a transmission seat 31. The linear transmission module drives the transmission seat 31 for linear transmission. The linear transmission module is a linear motor module, and the movable fixture 4 is mounted on the transmission seat 31. In this embodiment, the linear motor module, as a linear transmission module, provides high-precision linear transmission for the movable fixture 4. In the battery packaging steel strip tensile test, precise linear transmission allows the movable fixture 4 to move towards the fixed fixture 2 according to a preset trajectory and speed, thereby applying precise tensile force to the battery packaging steel strip. This is crucial for accurately simulating the tensile force experienced by the battery packaging steel strip during actual use of new energy vehicle batteries, ensuring that the test results truly reflect the mechanical properties of the steel strip and providing an accurate basis for evaluating its quality and reliability. During the tensile test, when it is necessary to apply tensile force to the battery packaging steel strip, the linear motor module can quickly start and drive the transmission seat 31 and the movable fixture 4 to move, rapidly applying tensile force to the steel strip. This makes the testing process more efficient, enabling the tensile test of the battery packaging steel strip to be completed in a short time, thus improving testing efficiency and meeting the demand for rapid testing of battery packaging steel strips during the large-scale production of new energy vehicles.

[0044] See Figure 5 As shown, the testing mechanism 5 includes a testing bracket 51, a testing connecting rod 52, a testing adjustment seat 53, and a testing probe 54. The testing bracket 51 is mounted on the frame 1, the testing connecting rod 52 is mounted on the testing bracket 51, the testing adjustment seat 53 is mounted on the testing connecting rod 52, and the testing probe 54 is used to detect the tensile flatness of the battery packaging steel strip. Specifically, the testing mechanism 5 is provided in multiple sets, each corresponding to a different position on the battery packaging steel strip. In this embodiment, the testing probe 54 is a CCD detection camera, and the testing mechanism 5 is provided in multiple sets, each corresponding to a different position on the battery packaging steel strip. During the tensile test, the changes in flatness of various parts of the battery packaging steel strip can be captured by the testing probe 54. Because the battery packaging steel strip needs to maintain good flatness during the use of new energy vehicle batteries, it is essential to ensure stable packaging and safe operation of the battery. Multiple testing mechanisms 5 comprehensively cover the steel strip, enabling timely detection of any unevenness, such as local bulges or depressions, that occurs at any point under tension. This provides a comprehensive and accurate basis for determining whether the steel strip meets the flatness requirements for new energy vehicle battery packaging. The testing bracket 51 is fixed to the frame 1, providing stable support for the entire testing mechanism 5. The testing link 52 is mounted on the testing bracket 51, and the testing adjustment seat 53 is mounted on the testing link 52. By adjusting the position of the testing adjustment seat 53 on the testing link 52, and the position of the testing link 52 relative to the testing bracket 51, the testing probe 54 can be easily and accurately positioned at specific testing locations on the battery packaging steel strip.

[0045] like Figures 1-6As shown, a detection method based on a steel strip size and tensile strength detection device for new energy vehicle battery packaging is characterized by the following steps:

[0046] Step S1, Positioning steel strip: Fix both ends of the rectangular battery packaging steel strip welded into a closed loop to the first positioning platform 21 of the fixed fixture 2 and the second positioning platform 41 of the movable fixture 4, respectively.

[0047] Step S2, Apply tension: Drive the movable fixture 4 along the length of the frame 1 away from the fixed fixture 2 through the transmission mechanism 3 to apply axial tensile force to the steel strip;

[0048] Step S3, Synchronous Detection: During the stretching process, the following parallel operations are performed: Step 3.1, the tensile force value of the steel strip is monitored in real time by the tensile force detection sensing element 6 set on the first positioning table 21 and / or the second positioning table 41; Step 3.2, the surface of the steel strip is scanned at multiple positions by the detection mechanism 5 on both sides of the frame 1 to obtain the dimensional change data and surface flatness of the steel strip under the stretching state.

[0049] Step S4, Output Results: Based on the monitoring data from step S3, generate reports on the steel strip's dimensional deformation, tensile strength, and appearance defects.

[0050] In this embodiment, the axial rigid fixation of the annular welded steel strip is achieved through a synchronous positioning mechanism at both ends of the closed-loop steel strip on the fixed / movable fixture 4. This eliminates stress concentration caused by traditional segmented clamping, ensuring that the tensile force is strictly transmitted along the length of the steel strip, thus improving the reliability of the test data. By using the parallel working mode of the tensile sensing element and the surface inspection mechanism 5, the mechanical properties and deformation characteristics during a single tensile test are captured collaboratively, directly establishing a correlation model of tensile force, deformation, and surface defects. This solves the industry problem that traditional step-by-step inspection cannot reflect dynamic deformation defects. Through the data fusion of multi-position appearance scanning and real-time tensile monitoring, a comprehensive quality profile of the steel strip under tension is generated: accurate dimensional changes in the width direction, identification of surface flatness defects, and analysis of tensile strength. This upgrades the test results from "single parameter judgment" to "multi-dimensional performance evaluation," directly outputting dimensional deformation, yield strength threshold, and defect distribution thermodynamics. Figure 3 Heavy industry parameters improve the efficiency of quality decision-making.

[0051] In the steel strip positioning step, the two ends of the rectangular battery packaging steel strip welded into a closed loop are precisely fixed to the first positioning platform 21 of the fixed fixture 2 and the second positioning platform 41 of the movable fixture 4. This precise positioning ensures uniform stress on the steel strip during subsequent tensile testing, avoiding test errors caused by positioning deviations and allowing the test results to accurately reflect the actual performance of the battery packaging steel strip. The movable fixture 4 is driven by the transmission mechanism 3 to move away from the fixed fixture 2 along the length of the frame 1, applying axial tensile force to the steel strip. This simulates the tensile stress experienced by the battery packaging steel strip during actual use, ensuring a comprehensive and accurate evaluation of its tensile performance. The stable and controllable tensile force application process helps to accurately determine the tensile strength of the steel strip, providing a reliable mechanical performance basis for the design and manufacturing of new energy vehicle battery packaging. Simultaneous detection during the tensile process allows for real-time monitoring of the tensile force value of the steel strip by the tensile detection sensing element 6 installed on the first positioning platform 21 and / or the second positioning platform 41. This accurately captures the stress changes of the steel strip during the tensile process and promptly identifies potential strength problems. On the other hand, the inspection mechanisms 5 on both sides of the frame 1 perform multi-position visual scanning of the steel strip surface to obtain dimensional change data and surface flatness data under tensile conditions. This multi-dimensional synchronous inspection method can comprehensively evaluate the performance of the steel strip during the tensile process. It can not only detect whether the strength of the steel strip meets the standard, but also detect whether there are appearance defects such as cracks and deformations on the surface of the steel strip, as well as whether the dimensional changes meet the design requirements, greatly improving the comprehensiveness and accuracy of the inspection.

[0052] Step 3.2, the dimensional inspection, specifically includes: simultaneously measuring at least three equidistant positions along the width direction of the steel strip using an adjustable detection probe 54; dynamically adjusting the probe height to adapt to the deformation surface of the steel strip based on the cooperation between the detection connecting rod 52 and the detection adjustment seat 53; calculating the offset of each measurement point from the reference plane to determine whether the lateral dimensional stability and flatness of the steel strip meet the standards. In this embodiment, simultaneously measuring at least three equidistant positions along the width direction of the steel strip using an adjustable detection probe 54 allows for comprehensive acquisition of dimensional information along the width direction of the steel strip. Under tension, the width variation of the steel strip at different positions may differ. Multi-point synchronous measurement can capture this variation, and compared to single-point measurement, it can more accurately reflect the actual situation of the overall width of the steel strip, avoiding inaccurate judgment of the steel strip width due to local measurement errors. This ensures that the width of the battery packaging steel strip meets the packaging requirements for new energy vehicle batteries.

[0053] During tensile testing, the steel strip deforms, forming a curved surface. By dynamically adjusting the probe height according to the cooperation between the detection linkage 52 and the detection adjustment seat 53, the probe height can be adapted to the deformed curved surface of the steel strip, ensuring that the detection probe 54 maintains good contact and an effective detection distance with the steel strip surface at all times. This way, even if the steel strip undergoes complex deformation during tensile testing, the detection probe 54 can accurately measure the actual dimensions of the steel strip surface, avoiding measurement deviations caused by improper probe-to-strip distance and improving the accuracy and reliability of dimensional detection.

[0054] Step 3.1, the tensile monitoring, includes: recording the real-time numerical change curve of the tensile detection sensing element 6 during the uniform movement of the movable fixture 4 driven by the transmission mechanism 3; triggering a system alarm and recording the tensile displacement of the steel strip at this time when the tensile force reaches a preset threshold; and calculating the elastic modulus and yield strength parameters of the steel strip by combining the displacement and the peak tensile force. In this embodiment, recording the real-time numerical change curve of the tensile detection sensing element 6 during the uniform movement of the movable fixture 4 driven by the transmission mechanism 3 can comprehensively and accurately present the change of tensile force with time or displacement of the battery packaging steel strip during the tensile test. Through this curve, the stress characteristics of the steel strip at different tensile stages can be clearly observed, such as the upward trend and fluctuation of the tensile force. This helps to analyze the mechanical response of the steel strip during the stress process and provides a detailed data basis for subsequent performance evaluation and quality judgment. When the tensile force reaches a preset threshold, the system triggers an alarm and records the tensile displacement of the steel strip at this time. The preset threshold is set according to the design requirements and safety standards of the new energy vehicle battery packaging steel strip. When the tensile force reaches this threshold, it means that the steel strip may be approaching its bearing limit. Timely alarms alert operators to the testing process, preventing overstretching that could damage the steel strip or testing equipment. Simultaneously, recording the tensile displacement provides crucial data for assessing the steel strip's deformation capacity under specific tension, helping to determine if the steel strip meets the requirements for use in new energy vehicle battery packaging.

[0055] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A new energy automobile battery package steel belt size tension detection device, characterized by: The device includes a frame, a fixed fixture, a transmission mechanism, a movable fixture, and a detection mechanism. The transmission mechanism is mounted on the frame and arranged along its length. The fixed fixture is located at one end of the frame, and the movable fixture is mounted on the transmission mechanism. The transmission mechanism drives the movable fixture to move relative to the fixed fixture. The detection mechanism is mounted on the frame and located on both sides of the transmission mechanism, and is used to detect the tensile appearance of the battery packaging steel strip. The fixed fixture is equipped with a first positioning platform, and the movable fixture is equipped with a second positioning platform. The battery packaging steel strip is a rectangular steel strip, with both ends welded together. The first and second positioning platforms are used to position the two ends of the battery packaging steel strip, respectively. Tensile force detection sensing elements are provided on the first and / or second positioning platforms to detect the tensile force generated by the transmission mechanism during the pulling process of the battery packaging steel strip.

2. The new energy vehicle battery package steel belt size tension detection device according to claim 1, characterized in that: The fixing fixture includes a side plate mounted on the frame and a support panel mounted on the side plate. The first positioning platform is mounted on the support panel, and a first positioning surface is provided on one side of the first positioning platform. The first positioning surface is used to fix one end of the battery packaging steel strip.

3. The new energy vehicle battery package steel belt size tension detection device according to claim 2, characterized in that: The first positioning stage includes a first positioning base plate and a first positioning block. The first positioning block is disposed on the first positioning base plate. The first positioning base plate is used for bottom support of the battery packaging steel strip. The first positioning surface is disposed on one side of the first positioning block.

4. The device for detecting the dimensional tensile strength of steel strips used in new energy vehicle battery packaging according to claim 3, characterized in that: The movable fixture includes a second positioning base plate and a second positioning block. The first positioning base plate is disposed on the transmission mechanism, and the second positioning block is disposed on the second positioning base plate. A second positioning surface is provided on one side of the second positioning block. The second positioning base plate is used for bottom support of the battery packaging steel strip. The second positioning surface and the first positioning surface are opposite to each other to form a rectangle.

5. The new energy vehicle battery package steel belt size tension detection device according to claim 1, characterized in that: The transmission mechanism includes a linear transmission module, which is provided with a transmission base. The linear transmission module is used to drive the transmission base in linear transmission. The linear transmission module is a linear motor module, and the movable fixture is mounted on the transmission base.

6. The new energy vehicle battery package steel belt size tension detection device according to claim 1, characterized in that: The testing mechanism includes a testing bracket, a testing connecting rod, a testing adjustment seat, and a testing probe. The testing bracket is mounted on the frame, the testing connecting rod is mounted on the testing bracket, the testing adjustment seat is mounted on the testing connecting rod, and the testing probe is used to test the tensile flatness of the battery packaging steel strip.

7. The new energy vehicle battery package steel belt size tension detection device according to claim 6, characterized in that: The testing mechanism is set up in multiple sets, each corresponding to a different position on the battery packaging steel strip.

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