Lithium ion battery pole piece performance comprehensive test platform

Abstract

This invention relates to a comprehensive performance testing platform for lithium-ion battery electrodes, comprising a base, a support, a crossbeam, an upper clamp, a lower clamp, a drive device, and a control module. The upper clamp includes a clamp head, a tension sensor, a guide and limiting structure, and a mounting interface. The clamp head is connected to the crossbeam via the tension sensor. The guide and limiting structure is connected between the crossbeam and the clamp head, configured to allow free vertical movement of the clamp head while limiting its horizontal displacement. The mounting interface is located on the clamp head and is configured for detachable connection to functional heads. This invention limits the horizontal displacement of the clamp head through the guide and limiting structure, preventing damage to the tension sensor from lateral forces, and enables rapid switching of functional heads through the mounting interface, thereby improving testing efficiency and equipment safety.

Description

Technical Field

[0001] This invention belongs to the field of lithium-ion battery electrode testing technology, specifically referring to a comprehensive performance testing platform for lithium-ion battery electrodes. Background Technology

[0002] Lithium-ion battery electrodes are two-layer composite materials consisting of an electrode coating and a current collector foil. Their mechanical properties directly affect the structural integrity and safety of the battery. Currently, mechanical performance tests for battery electrodes typically include peel tests, bending tests, scratch tests, and tensile tests. Existing testing equipment is mostly single-function testing machines, requiring laboratories to equip multiple machines with different functions and matching fixtures, resulting in high equipment costs, large space requirements, and inconvenient operation. Although integrated testing platforms with multiple testing functions have emerged on the market, the sensors of the testing device are easily damaged by lateral forces during non-axial force tests such as scratch and peel tests, and the function switching process is cumbersome, leading to low testing efficiency. Therefore, there is an urgent need for a highly integrated battery electrode performance testing device that can effectively protect sensors, enable rapid function switching, and achieve high integration. Summary of the Invention

[0003] The present invention aims to provide a comprehensive testing platform for the performance of lithium-ion battery electrodes, which can simplify the operation process and improve the integration while ensuring testing accuracy and equipment safety.

[0004] To achieve the above objectives, the present invention provides a comprehensive performance testing platform for lithium-ion battery electrodes, comprising a base, a support, a crossbeam, an upper clamp, a lower clamp, a driving device, and a control module. The upper clamp includes a clamp head, a tension sensor, a guide and limiting structure, and a mounting interface. The clamp head is connected to the crossbeam via the tension sensor. The guide and limiting structure is connected between the crossbeam and the clamp head, configured to allow the clamp head to move freely in the vertical direction and restrict the displacement of the clamp head in the horizontal direction. The mounting interface is located on the clamp head and is configured to detachably connect to a functional head.

[0005] As a further aspect of the present invention: the guide limiting structure includes a guide member and a mating part, the guide member and the mating part are slidably engaged, and the slidable engagement is configured to have a movable gap in the vertical direction and form a limiting constraint in the horizontal direction.

[0006] As a further embodiment of the present invention: the guide member is a guide rod, and the mating part is a guide hole; the top of the guide rod is fixedly connected to the crossbeam, the guide hole is provided in the clamp head, and the bottom of the guide rod is inserted into the guide hole.

[0007] As a further aspect of the present invention: the mounting interface includes a mounting hole in the clamp head and a pressure sensor at the bottom of the mounting hole; the functional head is detachably mounted in the mounting hole and contacts or cooperates with the pressure sensor.

[0008] As a further aspect of the present invention: the functional head is connected to the mounting hole via a magnetic structure.

[0009] As a further aspect of the present invention: the functional head is a scraper, the scraper includes a scraper head and an elastic buffer, the elastic buffer being disposed at the bottom of the scraper head.

[0010] As a further aspect of the present invention: the lower clamp is provided with an electric heating module, which is configured to heat the test sample.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: By setting a guide and limiting structure between the clamp head and the crossbeam, and utilizing the sliding cooperation between the guide and the mating part, the clamp head is allowed to move freely in the vertical direction while its horizontal displacement is restricted. This effectively solves the problem that the tensile sensor is easily damaged by lateral forces during non-axial force tests such as scratching and peeling, thus extending the service life of the equipment. By setting an installation interface for a built-in pressure sensor on the clamp head, and using a magnetic connection method, the quick switching and stable installation of functional heads such as the scratching blade and the scraper are realized, improving testing efficiency. In particular, the scraper enables automatic cleaning after the peeling test, and the design of the elastic buffer avoids damage from rigid contact, improving ease of operation. By setting an electrothermal module in the lower clamp, the mechanical properties of the electrode sheet under different temperature environments can be simulated, enhancing the applicability of the testing device. Attached Figure Description

[0012] Figure 1 This is a front view of the battery electrode performance testing device according to an embodiment of the present invention.

[0013] Figure 2 This is a front view of the battery electrode performance testing device in the adhesive scraping state according to an embodiment of the present invention.

[0014] Figure 3 This is a diagram showing the tensile test state of the battery electrode performance testing device according to an embodiment of the present invention.

[0015] Figure 4 This is a schematic diagram of the scratching blade of an embodiment of the present invention.

[0016] Figure 5 This is a schematic diagram of the glue scraper according to an embodiment of the present invention.

[0017] Figure 6 Figure a is a comparison chart of the comprehensive performance of different electrode materials (LFP / NCM523 / LCO).

[0018] Figure 6 b is a comparison chart of the efficiency of the device of the present invention and the conventional method in peeling, stretching, scratching, bending and adhesive scraping tests.

[0019] Figure 7 a is a graph showing the relationship between the rate of change of BET and the peel strength.

[0020] Figure 7 b is a graph showing the relationship between temperature and peel strength.

[0021] Figure 8 This is a graph showing the rate of change of BET for the electrode.

[0022] In the diagram: 1. Bracket, 2. Guide rod, 3. Tension sensor, 4. Crossbeam, 5. Control module, 6. Base, 7. Drive device, 8. Lead screw, 9. Slide rod, 10. Lower clamp, 11. Displacement sensor, 12. Guide hole, 13. Scraping tool, 14. Blind hole, 15. Pressure sensor, 16. Clamp head, 17. Upper clamp, 18. Grip, 19. Cavity, 20. Pad, 21. Scraper, 22. Spring, 23. Magnetic point I, 24. Magnetic point II. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Example 1:

[0025] like Figure 1 and Figure 3 As shown, a comprehensive testing platform for lithium-ion battery electrode performance includes a base 6, a support 1, a crossbeam 4, an upper clamp 17, a lower clamp 10, a drive device 7, and a control module 5. The support 1 is vertically mounted on the base 6, and the crossbeam 4 is slidably mounted on the support 1. The drive device 7 (such as a servo motor and lead screw assembly) drives the crossbeam 4 to move up and down along the support 1. The lower clamp 10 is mounted on the base 6 and is used to fix one end of the battery electrode sample. The upper clamp 17 is mounted on the crossbeam 4 and is used to clamp or connect the other end of the electrode, thereby enabling tensile and peel tests on the mechanical properties of the electrode. The control module 5 is electrically connected to the drive device 7, sensors, etc., and is used to control the testing process and collect data.

[0026] The upper clamp 17 includes a clamp head 16, a tension sensor 3, a guide and limiting structure, and a mounting interface. The clamp head 16 is connected to the crossbeam 4 via the tension sensor 3. The top end of the tension sensor 3 is fixedly connected to the crossbeam 4, and the bottom end is connected to the clamp head 16. During a tensile test, the clamp head 16 is subjected to a vertical tensile force, which is directly transmitted to the tension sensor 3 for measurement. This connection method ensures the accuracy of the tensile force measurement.

[0027] A guide and limiting structure connects the crossbeam 4 and the clamp head 16, configured to allow the clamp head 16 to move freely in the vertical direction while limiting its horizontal displacement. In conventional tensile testing, the force is primarily vertical, and the guide and limiting structure is unconstrained, allowing the clamp head 16 to move freely in the vertical direction with slight deformation of the force sensor or movement of the crossbeam 4, without interfering with the readings of the force sensor 3. However, during scratch testing or peeling tests followed by adhesive scraping, the clamp head 16 is subjected to lateral forces in the horizontal direction. Without protection, these lateral forces directly act on the force sensor 3, causing non-axial deformation of the sensor's elastomer, which can damage the sensor or reduce its accuracy over time. This embodiment constructs a "defense line" in the mechanical structure through the setting of a guide and limiting structure: when the clamp head 16 is subjected to a horizontal external force, the guide and limiting structure bears the lateral force, restricting the horizontal displacement of the clamp head 16, thereby preventing the tension sensor 3 from bearing lateral loads, effectively protecting the precision sensor, and extending the service life of the equipment. The specific form of the guide and limiting structure can be varied, such as the cooperation between the slider and the groove, the cooperation between the guide post and the guide sleeve, etc., as long as it can meet the motion constraint conditions of "vertical freedom and horizontal limitation".

[0028] The mounting interface is located on the clamp head 16 and is configured for detachable connection of functional heads. The mounting interface is located on the bottom or side of the clamp head 16 and is used to mount different types of functional heads, such as the scratching blade 13, the glue scraper 21, or conventional grippers. Through the detachable connection, users can quickly change functional heads according to different testing needs without replacing the entire upper clamp assembly, greatly improving testing efficiency and reducing equipment costs. For example, when performing a scratch test, the scratching blade 13 is installed; when performing a tensile test, it is replaced with a standard gripper. The connection method of the mounting interface can be threaded, snap-fit, or magnetic, etc., and this embodiment does not impose specific limitations on this.

[0029] Through the above structural design, the device in this embodiment not only realizes the testing of conventional performance such as stretching and peeling of battery electrode sheets, but also solves the problem of sensor damage in multi-functional integrated testing through the guide and limiting structure, realizes the flexible expansion of testing functions through the detachable installation interface, realizes the automatic cleaning function after peeling through the scraper 21, and expands the testing capability under temperature conditions through the heating module.

[0030] Furthermore, the specific implementation method of the above-mentioned guide and limit structure is explained in detail. For example... Figure 1 As shown, the guide limiting structure includes a guide member and a mating part. The guide member and the mating part are slidably fitted together. The slidable fit is configured to have a movable gap in the vertical direction and form a limiting constraint in the horizontal direction.

[0031] In this embodiment, the preferred guide component is a guide rod 2, and the mating part is a guide hole 12. The top of the guide rod 2 is fixedly connected to the crossbeam 4, for example, by threaded connection, interference fit, or integral molding. The guide hole 12 is provided in the clamp head 16, and the bottom of the guide rod 2 is inserted into the guide hole 12. For force balance, the guide rod 2 is preferably provided as two rods, located on both sides of the tension sensor 3, and correspondingly, the two ends of the clamp head 16 are provided with guide holes 12 corresponding to the guide rods 2.

[0032] The setting of the clearance is crucial for achieving the "vertical freedom and horizontal limitation" function. The diameter of the guide rod 2 is slightly smaller than the diameter of the guide hole 12, or a predetermined distance is reserved between the bottom of the guide rod 2 and the bottom of the guide hole 12, thus creating a movable clearance in the vertical direction. During a tensile test, the clamp head 16 will shift vertically due to the slight deformation of the force sensor 3 or the movement of the crossbeam. Because of the movable clearance, the guide rod 2 and the guide hole 12 do not interfere with each other in the vertical direction, allowing the clamp head 16 to float freely. This ensures that the force sensor 3 can accurately sense the axial tensile force without interference from the guide structure.

[0033] In the horizontal direction, a limiting constraint is formed between the side wall of the guide rod 2 and the inner wall of the guide hole 12. When a scratch test or adhesive scraping operation is performed, the clamp head 16 will be subjected to a lateral force in the horizontal direction. At this time, the clamp head 16 has a tendency to move horizontally, but since the guide rod 2 has been inserted into the guide hole 12, the inner wall of the guide hole 12 will abut against the guide rod 2. The guide rod 2, with its own bending stiffness, resists the lateral force, thereby limiting the displacement of the clamp head 16 in the horizontal direction. Through this structural design, the lateral force in the horizontal direction is directly transmitted to the rigid crossbeam 4 by the guide rod 2, avoiding the lateral force acting on the precision tension sensor 3, effectively preventing the sensor from being damaged due to non-axial loads, and significantly improving the reliability and service life of the device under complex working conditions.

[0034] Furthermore, the specific construction of the aforementioned installation interface will be described in detail. For example... Figure 1 and Figure 4 As shown, the mounting interface includes a mounting hole in the clamp head 16 and a pressure sensor at the bottom of the mounting hole. The mounting hole is preferably a blind hole 14, located at the bottom of the clamp head 16. A pressure sensor 15 is located at the bottom of the blind hole 14, and this pressure sensor 15 is used to detect the pressure applied to the test sample by the functional head. When the functional head is installed in the mounting hole, the tail of the functional head directly contacts or engages with the pressure sensor 15, thereby directly transmitting the pressure signal to the sensor. This structural design eliminates additional force transmission components, reduces errors in intermediate stages, and significantly improves the accuracy of pressure detection.

[0035] Furthermore, the functional head is connected to the mounting hole via a magnetic structure. A first magnetic element (such as a magnetic dot) is provided on the inner wall of the mounting hole, and a second magnetic element (such as an iron block or a magnetic dot with opposite poles) is provided at a corresponding position on the side wall of the functional head. When the functional head is inserted into the mounting hole, the first and second magnetic elements attract each other, thereby fixing the functional head to the clamp head 16. The magnetic connection method has the technical advantage of quick assembly and disassembly, allowing users to replace the functional head without the need for additional tools, greatly improving testing efficiency. At the same time, the magnetic structure also provides a certain positioning function, ensuring that the functional head is accurately positioned after installation and avoiding the impact of installation deviation on test results. In this embodiment, the functional head can be a scratching blade 13, the bottom of which directly contacts the pressure sensor 15 for scratch testing of the electrode surface and real-time feedback of scratch pressure.

[0036] In one specific application of this embodiment, the functional head is a scraper 21. The scraper includes a scraper head and an elastic buffer, the elastic buffer being located at the bottom of the scraper head.

[0037] Combination Figure 5 As shown, the scraper 21 is mainly used to remove the residual adhesive layer adhering to the pad after the peel test, thereby achieving automatic cleaning and replacing the traditional manual scraping operation. The scraper head is usually made of a hard material, such as hard alloy or ceramic, to ensure that it has sufficient hardness and wear resistance to scrape off the adhesive layer. The elastic buffer is preferably a spring 22, which is sleeved or abutted around the bottom of the scraper head.

[0038] In the installed state, the scraper 21 is connected to the clamp head 16 through the aforementioned mounting interface. The tail shape of the scraper head is adapted to the mounting hole, and the scraper head is provided with a magnetic point II24, which can attract each other with the magnetic point on the side wall of the mounting hole, thereby realizing the quick assembly, disassembly, and positioning of the scraper 21. Unlike the scratching blade 13, which directly contacts the pressure sensor 15, the elastic buffer (spring 22) in this embodiment is located at the bottom of the scraper head, and the bottom of the spring 22 does not directly contact the pressure sensor 15, but is located on the periphery or in a clearance area of ​​the pressure sensor 15. This structural design creates a "flexible contact" mechanism: when the upper clamp 17 moves down and the scraper 21 contacts the surface of the pad, the scraper head is subjected to an upward reaction force, which compresses the spring 22, causing the scraper head to produce a slight upward displacement relative to the mounting hole.

[0039] By incorporating an elastic buffer, a crucial cushioning and protective function is provided during the adhesive scraping process. When the scraper head removes a harder layer of adhesive or encounters uneven areas on the pad surface, the spring 22 absorbs the impact load, preventing rigid collisions between the scraper head and the pad. This effectively prevents scratches on the pad surface or chipping of the scraper blade, extending the lifespan of consumables. Simultaneously, since the spring 22 does not directly act on the pressure sensor 15, its elastic force avoids interference with the pressure sensor 15's readings. Furthermore, in situations where only scraping action is required without precise pressure monitoring, the control logic is simplified. This embodiment, through this "flexible contact" design, further enhances the device's functional versatility and improves operational convenience and safety.

[0040] In addition, such as Figure 1 or Figure 2 As shown, the lower clamp 10 is equipped with an electric heating module, which is configured to heat the test sample.

[0041] A cavity 19 is provided inside the right side of the lower clamp 10, and the heating module is installed inside the cavity 19. The heating module mainly includes a heating element and a temperature sensor. The heating element, as the heating element, generates heat when energized, and transfers the heat to the pad 20 of the lower clamp through thermal conduction or thermal radiation, thereby heating the battery electrode sample placed on the pad 20. The temperature sensor monitors the temperature of the lower clamp 10 or the pad 20 in real time and feeds the temperature signal back to the control module 5. The control module 5 adjusts the power of the heating element according to the set temperature value, thereby achieving constant temperature control.

[0042] This embodiment, by incorporating an electrothermal module, can simulate the mechanical properties of battery electrodes under different temperature environments. For example, batteries generate heat during actual operation, or their performance changes at high temperatures. The electrothermal module allows for the simulation of these conditions in a laboratory setting, enabling the testing of the electrode's peel strength or tensile properties at specific temperatures. This significantly expands the application range of the testing device, allowing it to meet a wider range of scientific research and production testing needs.

[0043] Example 2:

[0044] This embodiment combines Figure 2 and Figure 3 Taking the automatic adhesive scraping process after the peeling test as an example, this paper details the working process of the battery electrode performance testing device in practical applications. This process aims to verify the coordinated action between the various components of the device, particularly the sensor protection function of the guide and limiting structure under non-axial force conditions, and the practicality of the magnetic connection and elastic buffer structure.

[0045] The automatic glue application process in this embodiment includes the following steps:

[0046] Step S100: Install the functional head. According to the testing requirements, the operator installs the scraper 21 onto the clamp head 16 of the upper clamp 17. The scraper 21, as a type of functional head, has a tail shape that matches the mounting hole on the clamp head 16. The operator inserts the scraper 21 into the mounting hole, achieving quick and secure attachment via a magnetic structure. This process requires no additional tools, achieving a "plug-and-play" functionality for the functional head and significantly reducing pre-test preparation time. Simultaneously, the pressure sensor 15 at the bottom of the mounting hole forms a mating relationship with the tail of the scraper 21, providing a hardware foundation for potential subsequent pressure monitoring.

[0047] Step S200: Positioning of the lower clamp 10. The control module 5 controls the drive device to move the lower clamp 10 to the designated scraping position. At this position, the pad 20 on the right side of the lower clamp 10 (with residual adhesive layer from the peel test adhering to it) is horizontally aligned with the scraper 21 on the upper clamp 17. The movement of the lower clamp 10 can be precisely positioned through the cooperation of the lead screw 8 and the slide bar 9. The displacement sensor 11 monitors its position information in real time to ensure the accuracy of the scraping start position.

[0048] In step S300, the upper clamp 17 presses down to make contact. The control module 5 controls the crossbeam 4 to move downward along the bracket 1, causing the upper clamp 17 and the scraper 21 to move downward. When the scraper head of the scraper 21 contacts the surface of the pad, the scraper head is subjected to an upward reaction force. At this time, the elastic buffer (such as spring 22) located at the bottom of the scraper head is compressed and undergoes elastic deformation. This "flexible contact" mechanism plays a key role in buffering and protection: on the one hand, the compression deformation of spring 22 absorbs the impact load generated by rigid contact, preventing the scraper head or pad from being damaged by instantaneous impact; on the other hand, the continuous elastic force provided by the elastic buffer ensures that the scraper head adheres to the surface of the pad with stable pressure, ensuring the consistency of the scraping effect.

[0049] Step S400: Lateral movement of the scraper. With the scraper 21 in contact with the pad 20, the control module 5 drives the lower clamp 10 to move laterally. At this time, the scraper head of the scraper 21 slides relative to the surface of the pad 20, scraping away the residual adhesive layer. During this process, the scraper head experiences lateral resistance in the horizontal direction. Since the clamp head 16 is connected to the crossbeam 4 via the tension sensor 3, without protection, this lateral resistance will directly act on the tension sensor 3, causing non-axial deformation or even damage to the sensor's elastic body. In this embodiment, the guide limiting structure located between the crossbeam 4 and the clamp head 16 plays a crucial role. When the clamp head 16 is subjected to a lateral force in the horizontal direction, the guide member in the guide limiting structure and the mating part form a rigid constraint, limiting the horizontal displacement of the clamp head 16 and directly transmitting the lateral force to the rigid crossbeam 4, thereby preventing the tension sensor 3 from bearing lateral loads. This mechanical protection logic ensures that the tension sensor 3 is always in a safe state when the device is subjected to non-axial force operations such as scraping and scratching, thus extending the service life of the high-precision sensor.

[0050] Step S500: Reset and Disassembly. After the adhesive scraping is completed, the upper clamp 17 moves upward and resets, and the lower clamp 10 returns to its original position. The operator can easily remove the adhesive scraper 21 and replace it with the scratching blade 13 or standard grippers to perform the next test task. As can be seen from the above process, the device of the present invention not only realizes the automatic cleaning function after the peel test, solving the problems of low efficiency and easy hand injury caused by manual adhesive scraping, but also effectively solves the technical problem of easy sensor damage in multi-functional integrated testing through the guide limit structure and buffer design, significantly improving the integration and reliability of the testing device.

[0051] To verify the technical effectiveness of the device of the present invention, the following experiments were conducted:

[0052] Test Preparation: Check that all components of the test platform are functioning properly, calibrate the sensors to zero, and confirm that the temperature control of the heating module is normal. Install the pad and fix it to the right side of the lower fixture with screws. Cut the electrode sample into 15mm × 100mm strips and attach them to the pad using double-sided tape, ensuring a smooth and bubble-free adhesion. Set the test parameters: peeling speed 10mm / min, heating temperature 60℃.

[0053] Peeling Test: The one-button peeling program is initiated. The upper clamp holds the free end of the electrode, and the tension sensor is zeroed. The lower clamp moves horizontally at a speed of 10 mm / min, maintaining a peeling angle of 180°. Peeling force-displacement data is collected in real time at a sampling frequency of 100 Hz. Figure 7 a and Figure 7 As shown in b, the results of five repeated tests indicate that the average peel strength is 2.85 N / cm, the standard deviation is 0.12 N / cm, and the data are consistent, verifying the measurement reliability of the device under the conventional tensile test mode.

[0054] Scratch test: Replace the functional head with a scratching head, and set the scratch test parameters as follows: scratch pressure 2N, scratch speed 1mm / s, scratch length 20mm. Figure 6 As shown in Figure a, the measured pressure value of the pressure sensor was 2.01±0.05N, the scratch width was 152±8μm, and no large-area peeling of the coating occurred. These results demonstrate that the pressure sensor within the mounting interface can accurately monitor the scratch pressure, while the guide and limiting structure effectively protects the safety of the tension sensor under horizontal lateral force conditions—the sensor did not experience any decrease in accuracy or abnormal drift throughout the entire scratch test. This verifies the structure-mechanism-effect causal chain of the guide and limiting structure, which transmits lateral force to the rigid beam through a motion constraint mechanism of "vertical freedom and horizontal limitation," thus preventing the tension sensor from bearing non-axial loads.

[0055] Adhesive scraping function verification: After the peeling test, the one-button adhesive removal program was activated. The lower clamp automatically moved to the left to the scraping position, and the upper clamp moved down to align the scraper with the pad. The lower clamp moved to the right 20mm at a speed of 5mm / s, and the scraper removed the residual adhesive layer from the pad. After scraping, the surface cleanliness of the pad was ≥95%, with no obvious scratches or damage. The surface roughness test results showed that the Ra value of the pad was 0.4μm, consistent with that before scraping, meeting the requirements. The above results verified the buffering and protective effect of the elastic buffer component—the spring absorbs the impact load and provides continuous elastic force when the scraper head contacts the pad, allowing the scraper head to adhere to the pad surface with stable pressure, effectively removing the residual adhesive layer without damaging the pad.

[0056] Based on the above test results, such as Figure 6 b and Figure 8 As shown, the device of the present invention performs stably in the three test modes of peeling, scratching and scraping. The tensile sensor does not show a decrease in accuracy or damage under non-axial force conditions. The scraping function achieves efficient automatic cleaning without damaging the pad, which fully verifies the technical effect of the present invention.

Claims

1. A comprehensive testing platform for lithium-ion battery electrode performance, comprising a base, a bracket, a crossbeam, an upper clamp, a lower clamp, a drive device, and a control module, characterized in that, The upper clamp includes a clamp head, a tension sensor, a guide and limiting structure, and an installation interface; the clamp head is connected to the crossbeam via the tension sensor; the guide and limiting structure is connected between the crossbeam and the clamp head, configured to allow the clamp head to move freely in the vertical direction and limit the displacement of the clamp head in the horizontal direction; the installation interface is located on the clamp head and is configured to detachably connect to a functional head.

2. The comprehensive performance testing platform for lithium-ion battery electrodes according to claim 1, characterized in that, The guide limiting structure includes a guide member and a mating part. The guide member and the mating part are slidably engaged. The slidable engagement is configured to have a vertical clearance and form a limiting constraint in the horizontal direction.

3. The comprehensive performance testing platform for lithium-ion battery electrodes according to claim 2, characterized in that, The guide component is a guide rod, and the mating part is a guide hole; the top of the guide rod is fixedly connected to the crossbeam, the guide hole is located in the clamp head, and the bottom of the guide rod is inserted into the guide hole.

4. The comprehensive performance testing platform for lithium-ion battery electrodes according to claim 1, characterized in that, The mounting interface includes a mounting hole in the clamp head and a pressure sensor at the bottom of the mounting hole; the functional head is detachably mounted in the mounting hole and contacts or engages with the pressure sensor.

5. The comprehensive performance testing platform for lithium-ion battery electrodes according to claim 4, characterized in that, The functional head is connected to the mounting hole via a magnetic structure.

6. The comprehensive performance testing platform for lithium-ion battery electrodes according to claim 4, characterized in that, The functional head is a scraper, which includes a scraper head and an elastic buffer, with the elastic buffer located at the bottom of the scraper head.

7. The comprehensive performance testing platform for lithium-ion battery electrodes according to claim 1, characterized in that, The lower clamp is equipped with an electric heating module, which is configured to heat the test sample.

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