FPC performance test auxiliary device

Abstract

The application belongs to the technical field of power battery testing, and proposes an FPC performance test auxiliary device, which comprises a base, the upper surface of the base is provided with a front seat and a fixed seat placed opposite to each other, a sliding structure and a driving structure are arranged between the front seat and the fixed seat, a sliding seat is installed on the sliding structure, and the sliding seat is in transmission connection with the driving structure; the sliding seat is located between the front seat and the fixed seat; the upper surface of the front seat and the upper surface of the sliding seat are both provided with a pressing plate; a first clamping structure is arranged between the pressing plate and the front seat; and a second clamping structure is arranged between the pressing plate and the sliding seat. Through the design of the pressing plate and the sliding seat, the FPC sample of different sizes can be adapted, and the universality of the tooling and the flexibility of the test scheme are enhanced.

Description

Technical Field

[0001] This application belongs to the field of power battery testing technology, and specifically relates to an auxiliary device for FPC performance testing. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the safety and reliability of power battery packs are of paramount importance. A battery pack typically consists of multiple cell modules. During charge-discharge cycles and long-term use, the cells inevitably expand, causing displacement and deformation of the nickel plates and their connected components.

[0003] Flexible printed circuits (FPCs) serve as crucial electrical connections and signal acquisition components within battery packs, with their nickel strips fixed to different modules or fixed structures. When the battery cells in a module expand, the nickel strips on the FPC will experience relative displacement, forcing the FPC itself to undergo complex deformations such as stretching and bending. This long-term, cyclical mechanical stress, especially in harsh operating environments with high temperature and humidity, can easily lead to fatigue microcracks in the copper foil circuitry inside the FPC, resulting in serious faults such as signal transmission interruption, acquisition failure, or even short circuits, threatening the safety of the entire battery pack.

[0004] Currently, testing of FPCs (Flexible Printed Circuits) mainly focuses on their electrical performance or simple bending life, lacking a dedicated device that can accurately simulate their actual mechanical deformation state inside the battery pack and perform environmental stress (such as high temperature and high humidity) superposition tests under this state. Traditional testing methods cannot reproduce the specific pre-deformation of FPCs caused by cell expansion, and the test conditions deviate significantly from actual conditions, resulting in test results that cannot accurately predict and assess the reliability of FPCs throughout the vehicle's life cycle.

[0005] Therefore, there is an urgent need to design a dedicated test fixture that can accurately simulate the actual working conditions of FPC and integrate mechanical deformation and environmental simulation functions, so as to discover the design defects and potential failure risks of FPC in a timely manner during the research and development stage. Summary of the Invention

[0006] To address the aforementioned issues, this application proposes an FPC performance testing auxiliary device, comprising a base, a front seat and a fixed seat disposed opposite to each other on the upper surface of the base, a sliding structure and a driving structure disposed between the front seat and the fixed seat, a sliding seat mounted on the sliding structure, and the sliding seat being drivenly connected to the driving structure; the sliding seat is located between the front seat and the fixed seat. Both the upper surface of the front seat and the upper surface of the sliding seat are provided with pressure plates; a first clamping structure is provided between the pressure plates and the front seat; a second clamping structure is provided between the pressure plates and the sliding seat.

[0007] Furthermore, a digital display vernier caliper is provided at the end of the front seat and the fixed seat on the same side, and a reading head is provided at the end of the sliding seat. The reading head is slidably installed on the outside of the digital display vernier caliper.

[0008] Furthermore, locking bolts are provided on the upper surface of the front seat and the upper surface of the sliding seat, and the pressure plate is slidably installed on the outside of the locking bolts; a spring is fitted on the outside of the locking bolts; the spring is located between the pressure plate and the front seat, or between the pressure plate and the sliding seat.

[0009] Furthermore, both the first clamping structure and the second clamping structure include a bolt, a first movable block, and a second movable block. The first movable block is installed on the upper surface of the front seat or the sliding seat. The bolt is slidably installed in the groove on the upper surface of the pressure plate. The bolt passes through the pressure plate and connects to the second movable block. The first movable block and the second movable block are arranged opposite to each other.

[0010] Furthermore, protrusions are provided on the opposite sides of both the first and second movable blocks.

[0011] Furthermore, the sliding structure includes guide rods, with two guide rods installed between the front seat and the fixed seat.

[0012] Furthermore, the drive structure includes a lead screw, which is rotatably mounted between the front seat and the fixed seat; the lead screw is located between two guide rods; the lead screw meshes with a sliding seat; and the end of the lead screw away from the front seat passes through the fixed seat and is connected to the handwheel.

[0013] Furthermore, a sleeve is provided on the side of the fixed seat away from the front seat, and a stop screw is threaded on the outer side of the sleeve, which is engaged with the lead screw.

[0014] Furthermore, a cover is installed on the upper surface of the base, and the cover and the base form a cavity, in which the front seat, fixed seat, sliding seat and pressure plate are all installed.

[0015] Furthermore, a heating module, a humidity module, and a fan are sequentially arranged on the upper surface of the cover.

[0016] Beneficial effects: 1. The FPC performance testing auxiliary device of the present invention includes a base, a front seat and a fixed seat arranged opposite each other on the upper surface of the base, a sliding structure between the front seat and the fixed seat, a sliding seat mounted on the sliding structure, and the sliding seat being driven by a driving structure; the sliding seat is located between the front seat and the fixed seat. The design of the pressure plate and the sliding seat allows it to adapt to FPC samples of different sizes, enhancing the versatility of the tooling and the flexibility of the testing scheme.

[0017] 2. The FPC performance testing auxiliary device of the present invention includes a heating module, a humidity module and a fan to simulate the usage environment. Through the driving structure, the FPC sample is subjected to environmental aging test under continuous mechanical pre-deformation. It can effectively observe and study comprehensive failure phenomena such as whether the FPC conductor cracks, whether the cover film delaminates, and whether the solder joint cracks under this composite stress condition. This allows for earlier and more comprehensive discovery of potential product defects, providing key basis for FPC design improvement and quality enhancement.

[0018] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 An overall isometric view of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0021] Figure 2 A top view of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0022] Figure 3 The illustration shows a side view and a partial enlarged view of the FPC performance testing auxiliary device in an embodiment of this application.

[0023] Figure 4 An isometric view of the FPC performance testing auxiliary device with a cover, as shown in an embodiment of this application, is illustrated.

[0024] Figure 5 A schematic diagram of the base of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0025] Figure 6 A schematic diagram of the front seat of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0026] Figure 7 A schematic diagram of the sliding seat of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0027] Figure 8 A schematic diagram of the lead screw of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0028] Figure 9 A schematic diagram of the guide rod of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0029] Figure 10 A schematic diagram of the handwheel of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0030] Figure 11 A schematic diagram of a digital vernier caliper for an FPC performance testing auxiliary device in an embodiment of this application is shown.

[0031] Figure 12 A schematic diagram of an FPC sample of an FPC performance testing auxiliary device according to an embodiment of this application is shown.

[0032] Figure 13 A schematic diagram of the pressure plate of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0033] Figure 14 A schematic diagram of the first active block of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0034] Figure 15 A schematic diagram of the cover of the FPC performance testing auxiliary device in an embodiment of this application is shown.

[0035] Explanation of reference numerals in the attached drawings: 1. Base; 2. Pressure plate; 3. Spring; 4. Front seat; 5. Digital vernier caliper; 51. Reading head; 6. Guide rod; 7. Sliding seat; 81. First moving block; 82. Second moving block; 83. Protrusion; 9. Screw; 10. Fixed seat; 11. Handwheel; 12. FPC sample; 121. Nickel sheet; 13. Bolt; 14. Locking bolt; 15. Lead screw; 16. Heating module; 17. Humidity module; 18. Fan; 19. Cover; 20. Stop screw. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Example 1 The purpose of this invention is to provide an auxiliary device for FPC performance testing. This invention is designed to be simple and easy to operate, with strong flexibility and adjustability, and is used to realize tensile pre-deformation testing of FPC aging performance.

[0038] refer to Figure 1 An auxiliary device for FPC performance testing includes a base 1, a pressure plate 2, a spring 3, a front seat 4, a digital display vernier caliper 5, a guide rod 6, a sliding seat 7, a screw 9, a fixed seat 10, a handwheel 11, an FPC sample 12, a bolt 13, a locking bolt 14, a lead screw 15, a heating module 16, a humidity module 17, a fan 18, a cover 19, and a stop screw 20. The entire fixture is mounted on a rigid base 1 (see reference). Figure 5 The base 1 serves as the basic platform for integrating and installing all other components. A front seat 4 and a fixed seat 10 are mounted on the upper surface of the base 1. Two high-precision guide rods 6 are mounted parallel to each other between the front seat 4 and the fixed seat 10, forming the guide rails for the entire displacement system. A lead screw 15 is rotatably connected to the front seat 4 and the fixed seat 10 at both ends, and a sliding seat 7 is installed between the front seat 4 and the fixed seat 10, with the sliding seat 7 sliding on the outside of the two guide rods 6; the lead screw 15 is threadedly engaged with the sliding seat 7; a handwheel 11 is mounted on one end of the lead screw 15, located on the side of the fixed seat 10 away from the front seat 4. Rotating the handwheel 11 (see reference) Figure 10 When the lead screw 15 rotates, it drives the sliding seat 7 to move smoothly and precisely forward or backward along the guide rod 6. Above the front seat 4 and the sliding seat 7, pressure plates 2 are connected by locking bolts 14; each pressure plate 2 is connected to a second movable block 82 by bolts 13. The surface of the second movable block 82 is designed with corrugated protrusions 83 to ensure secure clamping of the nickel sheet 121 of the FPC sample 12. Digital vernier calipers 5 are fixed to the sides of the front seat 4 and the fixed seat 10 by screws 9. The reading head 51 is connected to the sliding seat 7 and slidably mounted on the digital vernier caliper 5. When the reading head 51 moves, the caliper measures and digitally displays its displacement in real time, thereby achieving precise control and reading of the deformation of the FPC sample 12. A cover 19 is installed on top of the entire fixture. The top of the cover 19 has reserved mounting holes for installing a heating module 16, a humidity module 17 and a fan 18. These are controlled by an external controller, thereby creating a high-temperature and high-humidity environment in the area where the FPC sample 12 is clamped.

[0039] Example 2 refer to Figure 3 An auxiliary device for FPC performance testing includes a base 1. A front seat 4 and a fixed seat 10 are disposed opposite to each other on the upper surface of the base 1. A sliding structure and a driving structure are provided between the front seat 4 and the fixed seat 10. A sliding seat 7 is installed on the sliding structure and is connected to the driving structure in a transmission manner. The sliding seat 7 is located between the front seat 4 and the fixed seat 10.

[0040] refer to Figure 2A pressure plate 2 is provided on the upper surface of the front seat 4 and the upper surface of the sliding seat 7; a first clamping structure is provided between the pressure plate 2 and the front seat 4; and a second clamping structure is provided between the pressure plate 2 and the sliding seat 7. The design of the pressure plate 2 and the sliding seat 7 allows them to be adapted to FPC samples 12 of different sizes, enhancing the versatility of the tooling and the flexibility of the testing scheme.

[0041] This invention simulates the usage environment by setting up a heating module 16, a humidity module 17, and a fan 18. Through the driving structure, the FPC sample 12 is subjected to environmental aging test under continuous mechanical pre-deformation. This allows for effective observation and study of comprehensive failure phenomena such as cracks, delamination of the cover film, and cracking of solder joints in the FPC sample 12 under this combined stress condition. This enables the earlier and more comprehensive discovery of potential product defects, providing key basis for FPC design improvement and quality enhancement.

[0042] refer to Figure 3 A digital vernier caliper 5 is provided on the same side of the front seat 4 and the fixed seat 10, and a reading head 51 is provided on the end of the sliding seat 7. The reading head 51 is slidably mounted on the outside of the digital vernier caliper 5. (Reference) Figure 11 The reading head 51 of the digital vernier caliper 5 is installed on the side of the sliding seat 7, so that the measurement accuracy reaches 0.01 mm and the deformation displacement change of the FPC sample 12 can be displayed in real time.

[0043] This invention features precise and controllable pre-deformation and real-time monitoring. Unlike traditional tooling methods that rely on manual estimation or simple rulers for coarse displacement control, this invention innovatively integrates a digital vernier caliper 5 as a displacement measuring device, combined with a precision lead screw 15. This design allows operators to digitally and visually fine-tune and monitor the pre-deformation displacement applied to the FPC sample 12 in real time via a handwheel 11, greatly improving the accuracy and repeatability of displacement control and providing a precise data foundation for studying the impact of different expansion displacement amounts on the FPC sample 12.

[0044] refer to Figure 3 Locking bolts 14 are provided on the upper surface of the front seat 4 and the upper surface of the sliding seat 7. The pressure plate 2 is slidably mounted on the outside of the locking bolts 14. A spring 3 is fitted on the outside of the locking bolts 14. The spring 3 is located between the pressure plate 2 and the front seat 4, or between the pressure plate 2 and the sliding seat 7. The spring 3 generates elastic force, which is released by turning the locking bolts 14. The spring 3 generates elastic force to push the pressure plate 2 upward, thereby facilitating the clamping of the FPC sample 12.

[0045] Furthermore, the clamping structure includes a bolt 13, a first movable block 81, and a second movable block 82. The first movable block 81 is mounted on the upper surface of either the front seat 4 or the sliding seat 7. The bolt 13 is slidably mounted in a groove on the upper surface of the pressure plate 2. The bolt 13 passes through the pressure plate 2 and connects to the second movable block 82. The first movable block 81 and the second movable block 82 are arranged opposite to each other. A spring 3 is sleeved on the outside of the locking bolt 14, so that after the locking bolt 14 is released, the spring 3 pushes the pressure plate 2 upwards, increasing the gap between the second movable block 82 on the front seat 4 and the second movable block 82 on the sliding seat 7 and the first movable block 81 on the pressure plate 2, respectively, facilitating the placement of the FPC sample 12 to be tested within the movable gap.

[0046] refer to Figure 14 Both the first movable block 81 and the second movable block 82 have protrusions 83 on opposite sides. The surfaces of the first movable block 81 and the second movable block 82 near the FPC sample 12 are designed with wavy protrusions 83. These protrusions 83 are used to increase the support of the nickel sheet 121 (see reference) on the FPC sample 12. Figure 12 The clamping stability; refer to Figure 9 The sliding structure includes guide rods 6, with two guide rods 6 installed between the front seat 4 and the fixed seat 10. The guide rods 6 limit the sliding seat 7, improving accuracy.

[0047] refer to Figure 8 The drive structure includes a lead screw 15, which is rotatably mounted between the front seat 4 and the fixed seat 10. The lead screw 15 is located between two guide rods 6. The lead screw 15 meshes with a sliding seat 7. The end of the lead screw 15 away from the front seat 4 passes through the fixed seat 10 and is connected to the handwheel 11. The cooperation between the lead screw 15 and the guide rods 6 precisely drives the sliding seat 7, causing the FPC sample 12 to undergo pre-deformation / displacement. The displacement accuracy is controlled within 0.001mm to ensure the precision of displacement control.

[0048] refer to Figure 2 A sleeve is provided on the side of the fixed seat 10 away from the front seat 4. A stop screw 20 is installed on the outer thread of the sleeve. The stop screw 20 is engaged with the lead screw 15 to prevent the lead screw 15 from rotating, thereby causing inaccurate test results.

[0049] Compared to fixed or highly automated specialized equipment that lacks flexibility, this invention uses a manually operated handwheel 11 to achieve pre-deformation. It has a simple structure and low cost, but the convenience of operation and the accuracy of the results are ensured by a precise mechanical structure (lead screw 15, guide rod 6) and a digital display vernier caliper 5.

[0050] refer to Figure 4A cover 19 is installed on the upper surface of the base 1, forming a cavity with the base 1. The front seat 4, the fixed seat 10, the sliding seat 7, and the pressure plate 2 are all installed in the cavity. This facilitates the simulation of the actual use environment of the FPC sample 12.

[0051] refer to Figure 15 The upper surface of the cover 19 is sequentially equipped with a heating module 16, a humidity module 17, and a fan 18. The heating module 16 enables precise control of the ambient temperature; the humidity module 17 enables precise control of the ambient humidity; and the fan 18 is used for air circulation to achieve uniform environmental regulation. Furthermore, the cover 19 is made of transparent acrylic material, facilitating real-time observation of the testing process and reading displacement data changes. This invention improves the comprehensiveness of the test and the ability to detect failure modes by adjusting the position between the sliding seat 7 and the front seat 4. Traditional methods may miss potential failure modes (such as stress corrosion cracking) because they cannot simultaneously apply mechanical and environmental stresses.

[0052] This invention integrates a mechanical pre-deformation mechanism and a high-temperature and high-humidity environment simulation module onto a single tooling platform through an integrated design. This not only greatly simplifies the setup process of the testing system and avoids connection and compatibility issues between devices, but also ensures the stability and synergy of test conditions (such as displacement, temperature, and humidity), significantly improving testing efficiency and the reliability of results.

[0053] This invention realistically simulates the actual working environment of a battery module. Existing testing methods often only perform single mechanical stress tests or environmental aging tests, failing to comprehensively simulate the coupled effect of cell expansion and high-temperature and high-humidity environment within the power battery pack. This invention, by integrating independent heating modules 16, humidity modules 17, and fans 18, can provide a stable, uniform, and controllable high-temperature and high-humidity environment for the FPC sample 12 while maintaining it in a predetermined deformation state. This more realistically and rigorously reproduces the actual working conditions of the FPC sample 12 within the battery pack, making the test results more valuable for engineering guidance.

[0054] refer to Figure 6 Furthermore, the front seat 4 (reference) Figure 6 ), Sliding seat 7 (reference) Figure 7 ) and pressure plate 2 (reference) Figure 13 The mounting holes are designed as elongated holes to facilitate the adjustment of the position of the movable blocks (first movable block 81 or second movable block 82) so as to accommodate FPC samples 12 of different widths and match nickel sheets 121 in different positions.

[0055] The actual use of this application includes the following steps: S1, Sample Installation: Release the locking bolt 14. Spring 3 pushes the pressure plate 2 upward, increasing the gap between the second movable block 82 on the front seat 4 and the second movable block 82 on the sliding seat 7 and the first movable block 81 on the pressure plate 2, facilitating the placement of the FPC sample 12 to be tested within the gap. Then, by rotating the locking bolt 14 on the pressure plate 2, the nickel sheet 121 of the FPC sample 12 is pressed between the second movable block 82 and the first movable block 81, ensuring that the FPC sample 12 is firmly clamped between the front seat 4 and the pressure plate 2, and between the sliding seat 7 and the pressure plate 2. During clamping, care should be taken to avoid applying excessive pressure to the nickel sheet 121 of the FPC sample 12 to prevent damage. Simultaneously, ensure that the FPC sample 12 is reliably fixed and that the electrical connection is normal (this can be achieved by connecting an external wire to the terminals of the FPC sample 12 to monitor its continuity resistance).

[0056] S2, apply pre-deformation, read the initial value of the digital vernier caliper 5 and zero it. According to the simulated expansion amount required by the test outline, slowly rotate the handwheel 11 to drive the digital vernier caliper 5 to move. At the same time, observe the reading of the digital vernier caliper 5 until the displacement reaches the predetermined value (e.g., 1.23 mm), then stop rotating and lock the lead screw 15 with the stop screw 20. At this time, the FPC sample 12 has been stretched and held in this pre-deformation state.

[0057] S3. Create a test environment and cover the chamber with the cover 19. Set the target temperature and adjust the temperature through the heating module 16 to achieve the target temperature; set the target humidity and adjust the humidity through the humidity module 17 to achieve the target humidity; and start the fan 18 to gradually bring the environment inside the chamber to the required high temperature and high humidity conditions.

[0058] S4, Testing and Monitoring: The FPC sample 12 is kept in a pre-deformed state for a certain period of time (1000 hours) under set environmental conditions. During this period, the surface of the FPC sample 12 can be periodically inspected through the observation window of the cover 19 for physical defects such as cracks, blistering, and plating peeling. At the same time, the on-resistance of the circuit of the FPC sample 12 is continuously or intermittently measured by an external monitoring device to determine whether its electrical performance has failed.

[0059] S5. Results Analysis: After the test, FPC sample 12 is removed for detailed appearance inspection and dissection analysis, and compared with the data before the test to comprehensively evaluate the reliability of the soft connection of FPC sample 12.

[0060] The main features of this invention are: 1. Precise displacement control: Through the cooperation of the pressure plate 2, front seat 4, sliding seat 7, lead screw 15, guide rod 6, and handwheel 11, manual pre-deformation displacement control at both ends can be achieved. Furthermore, digital display vernier calipers 5 are installed on the pressure plate 2 and fixed seat 10, which can achieve precise displacement adjustment, ensuring that the pre-deformation degree of the FPC meets the test requirements and improving the accuracy of the test.

[0061] 2. Comprehensive environmental simulation: The entire fixture can be equipped with a heating module 16, a humidity module 17, and a fan 18, which can simulate high temperature and high humidity environmental conditions, providing FPC with test conditions similar to the actual use environment, making the test results more valuable and helping to more comprehensively evaluate the performance of FPC in actual use.

[0062] 3. Simple structure and easy operation: The pre-deformation displacement control of FPC is carried out by manual operation, which is simple and easy to learn. It does not require complicated equipment and operation procedures, which reduces testing costs and improves testing efficiency. It is also conducive to promotion and application in different laboratories and production environments.

[0063] 4. High adaptability: This fixture is suitable for FPCs of different sizes and shapes. By adjusting the position of the pressure plate 2 and the sliding seat 7, as well as the stroke of the lead screw 15, it can meet the testing requirements of various FPCs. It has strong versatility and adaptability and can provide an effective testing solution for different models of power battery pack FPCs.

[0064] 5. High safety: Safety has been fully considered in the design process. The installation position and operation mode of the heating module 16 and humidity module 17 have been carefully designed to avoid the risk of injury to operators caused by high temperature and high humidity environment. At the same time, it can also ensure the safety and stability of FPC during the testing process and ensure the smooth progress of the testing work.

[0065] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An auxiliary device for FPC performance testing, characterized in that, Includes a base (1), on the upper surface of which a front seat (4) and a fixed seat (10) are disposed opposite to each other. A sliding structure and a driving structure are provided between the front seat (4) and the fixed seat (10). A sliding seat (7) is installed on the sliding structure and is connected to the driving structure in a transmission manner. The sliding seat (7) is located between the front seat (4) and the fixed seat (10). The upper surface of the front seat (4) and the upper surface of the sliding seat (7) are both provided with pressure plates (2); a first clamping structure is provided between the pressure plate (2) and the front seat (4); a second clamping structure is provided between the pressure plate (2) and the sliding seat (7).

2. The FPC performance testing auxiliary device according to claim 1, characterized in that, A digital vernier caliper (5) is provided on the same side of the front seat (4) and the fixed seat (10), and a reading head (51) is provided on the end of the sliding seat (7). The reading head (51) is slidably installed on the outside of the digital vernier caliper (5).

3. The FPC performance testing auxiliary device according to claim 2, characterized in that, Locking bolts (14) are provided on the upper surface of the front seat (4) and the upper surface of the sliding seat (7). The pressure plate (2) is slidably installed on the outside of the locking bolts (14). A spring (3) is fitted on the outside of the locking bolts (14). The spring (3) is located between the pressure plate (2) and the front seat (4), or between the pressure plate (2) and the sliding seat (7).

4. The FPC performance testing auxiliary device according to claim 1, characterized in that, Both the first clamping structure and the second clamping structure include a bolt (13), a first movable block (81), and a second movable block (82). The upper surface of the front seat (4) or the sliding seat (7) is equipped with the first movable block (81). The bolt (13) is slidably installed in the groove on the upper surface of the pressure plate (2). The bolt (13) passes through the pressure plate (2) and is connected to the second movable block (82). The first movable block (81) and the second movable block (82) are arranged opposite to each other.

5. The FPC performance testing auxiliary device according to claim 4, characterized in that, The first movable block (81) and the second movable block (82) each have a protrusion (83) on their opposite sides.

6. The FPC performance testing auxiliary device according to claim 1, characterized in that, The sliding structure includes guide rods (6), and two guide rods (6) are installed between the front seat (4) and the fixed seat (10).

7. The FPC performance testing auxiliary device according to claim 6, characterized in that, The drive structure includes a lead screw (15), which is rotatably mounted between the front seat (4) and the fixed seat (10); the lead screw (15) is located between two guide rods (6); the lead screw (15) meshes with the sliding seat (7); one end of the lead screw (15) away from the front seat (4) passes through the fixed seat (10) and is connected to the handwheel (11).

8. The FPC performance testing auxiliary device according to claim 7, characterized in that, A sleeve is provided on the side of the fixed seat (10) away from the front seat (4), and a stop screw (20) is threaded on the outer side of the sleeve. The stop screw (20) is engaged with the lead screw (15).

9. An FPC performance testing auxiliary device according to any one of claims 1-8, characterized in that, The upper surface of the base (1) is fitted with a cover (19), which forms a cavity with the base (1). The front seat (4), the fixed seat (10), the sliding seat (7) and the pressure plate (2) are all installed in the cavity.

10. The FPC performance testing auxiliary device according to claim 9, characterized in that, The upper surface of the cover (19) is provided with a heating module (16), a humidity module (17) and a fan (18) in sequence.

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