Device and method for detecting viscosity of battery pole sealant

Abstract

The invention relates to the technical field of material performance detection, and particularly discloses a device and a method for detecting the viscosity of a battery pole sealant. The device comprises a base, a standard test plate, a driving mechanism, a bonding test execution mechanism and a displacement sensing mechanism, the driving mechanism is arranged at the top of the base; the standard test board is transversely arranged at the top of the base, and one end is provided with a groove; the adhesion test executing mechanism comprises a sliding block and a temperature control pressure head hinged to the sliding block, the sliding block is driven by a driving mechanism, and a pressure sensor is integrated at the hinged position; the displacement sensing mechanism is arranged on the base; the method comprises the steps of sample loading and positioning, pressing temperature control, constant-speed pulling, synchronous acquisition of adhesive force and displacement, determination of separation time, recording of final displacement, and calculation of viscosity characterization value. According to the invention, a signal is amplified through a single-end bonded and lifted lever structure, and non-contact vision measurement and integrated temperature control are combined, so that the test sensitivity, precision and temperature adaptability are remarkably improved, and efficient, accurate and automatic characterization of the viscosity of the sizing material is realized.

Description

Technical Field

[0001] This invention relates to the field of material performance testing technology, specifically to a device and method for testing the viscosity of battery terminal sealant. Background Technology

[0002] In the field of industrial battery manufacturing, the performance of terminal sealant directly affects the long-term sealing reliability and safety of the battery. Accurate characterization of the viscosity of the cured sealant is a key step in evaluating its process quality and sealing effect. Therefore, developing an objective and quantitative method for testing sealant viscosity is of great significance for ensuring the consistency and reliability of battery products.

[0003] To achieve quantitative characterization of adhesive viscosity, existing technologies typically employ direct mechanical measurement methods. These methods apply tensile or peeling forces to the adhesive or its composite structure using standardized mechanical devices, and simultaneously record the relevant force values ​​and displacement parameters. Then, based on a mechanical model, quantitative indicators reflecting the material's viscosity are calculated.

[0004] However, existing direct mechanical measurement methods have general limitations in structural design, resulting in insufficient test sensitivity and resolution. Conventional test structure layouts often fail to effectively capture and amplify the key mechanical signals generated by minute changes in the adhesive force of the rubber compound. This makes the response of the entire measurement system to differences in adhesive force insufficient, and the interpretation of the separation process is easily interfered with, ultimately affecting the reliability of accurately distinguishing and evaluating rubber compounds of different viscosity grades. Summary of the Invention

[0005] To address the technical problems in the prior art, this invention provides a device and method for detecting the viscosity of battery terminal sealant, aiming to solve the problem that the existing adhesive viscosity measuring devices have insufficient testing sensitivity, low response and resolution to small changes in adhesion force, resulting in limited reliability of measurement results.

[0006] The technical solution of the present invention is as follows: A device for detecting the viscosity of battery terminal sealant includes a base, a standard test plate, a drive mechanism, an adhesion testing execution mechanism, and a displacement sensing mechanism. The drive mechanism is located on the top of the base; The standard test plate is horizontally positioned on the top of the base, with a groove for accommodating the adhesive material at one end; The bonding test actuator includes a sliding block and a temperature-controlled pressure head; The sliding block is mounted on the driving mechanism and is driven to connect with the driving mechanism. The driving mechanism can drive the sliding block to move longitudinally. The temperature control head is located at the corresponding groove at the bottom of the sliding block and is hinged to the sliding block. The swing direction of the temperature control head is consistent with the extension direction of both ends of the standard test plate, so as to adapt to the tilt generated by the standard test plate when it is lifted. The sliding block is integrated with a pressure sensor at the hinge point corresponding to the temperature control head. The displacement sensing mechanism is mounted on the base and is used to collect and measure the vertical displacement of the lifted end of the standard test plate.

[0007] Optionally, the temperature-controlled pressure head includes a pressure head base, a temperature control component, a temperature sensor, and a heat-conducting pressure block, wherein, The pressure head base is hinged to the bottom of the sliding block, and heat dissipation holes are provided on the surface of the pressure head base to adjust the thermal environment inside and outside the pressure head base. The temperature control component is located inside the pressure head base; The heat-conducting pressure block is fixedly disposed at the bottom of the pressure head base and is thermally connected to the temperature control component to transfer the heat generated by the temperature control component to the contact surface with the adhesive. The sidewall of the pressure head substrate is provided with heat dissipation holes corresponding to the heat dissipation end of the temperature control component, which are used to exhaust non-target heat generated by the temperature control component during operation to the outside of the pressure head substrate. The temperature sensor is thermally connected to the heat-conducting pressure block and is located in the pressure head base, used to sense the temperature of the heat-conducting pressure block in real time.

[0008] Optionally, the temperature-controlled pressure head may further include a heat insulation layer; The heat insulation layer is disposed on the inner wall between the pressure head substrate and the working end of the temperature control component, and is used to reduce the loss of the target heat generated by the temperature control component, so as to improve the temperature control response speed and accuracy.

[0009] Optionally, the standard test plate includes a plate body and rollers, wherein, The plate is horizontally positioned on the top of the base, with one end corresponding to the temperature control head. The groove is opened at the end of the plate corresponding to the temperature control head. The roller is located at the bottom of the end of the plate away from the groove; When the temperature-controlled pressure head lifts the plate through the adhesive material, the roller is used to convert the sliding friction between the plate and the top of the base into rolling friction.

[0010] Optionally, the displacement sensing mechanism includes a two-dimensional vision sensor; The two-dimensional vision sensor is located on the top of the base, corresponding to the standard test plate near the groove end. The top surface of the base has a mounting groove corresponding to the two-dimensional vision sensor. The two-dimensional vision sensor is located in the mounting groove, and the height of the two-dimensional vision sensor is lower than the depth of the mounting groove. The standard test board has an optical mark at the bottom of one end near the groove. The optical mark corresponds to the field of view of the two-dimensional vision sensor and is used for the two-dimensional vision sensor to track and identify.

[0011] Optionally, a support platform is provided on the top of the base corresponding to the standard test plate; The mounting slot is formed on the support platform; The upper surface of the support platform is provided with air channels corresponding to the placement area of ​​the standard test plate. These channels are used to balance the air pressure on the lower surface of the standard test plate when it is lifted, thus preventing vacuum adsorption.

[0012] Optionally, a device for detecting the viscosity of battery terminal sealant also includes a positioning block; The positioning block is fixedly installed on the upper surface of the support platform and is located on the side away from the groove where the standard test plate is placed; The positioning block has positioning surfaces that match the ends and sides of the standard test plate, and is used to quickly position the standard test plate placed on the support platform.

[0013] Optionally, a device for detecting the viscosity of battery terminal sealant further includes a control mechanism, which comprises a PLC controller and a control panel. The PLC controller is integrated inside the base and is electrically connected to the drive mechanism, pressure sensor, displacement sensing mechanism and temperature control head. It is used to coordinate the actions of each mechanism and process sensor data according to a preset program. The control panel is located on the outer surface of the base and is used for human-computer interaction to set parameters, start and stop tests, and display results.

[0014] This invention also provides a method for detecting the viscosity of battery terminal sealant. The method uses the aforementioned device for detecting the viscosity of battery terminal sealant to detect the viscosity of the sealant. The detection method includes: S1: Fill the groove of the standard test plate with the adhesive to be tested; place the standard test plate on the upper surface of the support platform and make the end away from the groove abut against the positioning block to complete the horizontal and vertical positioning, and ensure that the groove is perpendicular to the temperature control pressure head of the bonding test actuator. S2: The PLC controller controls the drive mechanism to drive the sliding block and temperature control head to descend, so that the temperature control head is embedded in the groove and fully contacts the adhesive. The preset pressure is used to press and hold for a preset time to complete the bonding. At the same time, the PLC controller controls the temperature control component to adjust the temperature so that the temperature of the heat-conducting pressure block reaches and stabilizes at the test set value. S3: Record the start time of lifting and control the drive mechanism via PLC controller to lift the temperature control head vertically upward at a preset constant speed. The temperature control head causes one end of the standard test board to tilt up through adhesive force. During this process: the vertical adhesive force on the temperature control head is collected in real time by pressure sensor; the optical mark on the bottom of the standard test board is identified by two-dimensional vision sensor, and the vertical displacement of the lifted end of the standard test board is collected in real time in a non-contact manner. S4: Continue to pull and collect data until the vertical adhesive force collected by the pressure sensor drops sharply to near zero, which represents the moment when the adhesive material and the temperature control pressure head break apart; the PLC controller then determines that the adhesion has failed and locks this moment as the separation moment, and locks the vertical displacement collected by the two-dimensional vision sensor at this moment as the final separation displacement. S5: Based on the separation time, constant lifting speed, final separation displacement, known weight of the standard test plate, and cross-sectional area of ​​the temperature-controlled pressure head contact surface, the viscosity characterization value of the rubber compound is calculated and output through the preset calculation model inside the control mechanism.

[0015] Optionally, the step of calculating and outputting the viscosity characterization value of the adhesive compound through a preset calculation model within the control mechanism includes: The lifting duration is determined based on the separation time and the lifting start time, and the theoretical displacement of the temperature-controlled pressure head is obtained by combining the constant lifting speed. By comparing the final separation displacement with the theoretical displacement, the displacement difference caused by the viscoelastic properties of the rubber compound is obtained. By combining the displacement difference, the final separation displacement, the weight of the standard test plate, and the cross-sectional area of ​​the temperature-controlled pressure head, the viscosity characterization value of the adhesive is calculated using a predetermined algorithm model.

[0016] Compared with the prior art, the device and method for detecting the viscosity of battery terminal sealant provided by the present invention have the following advantages: (1) By setting the adhesive tank of the standard test plate and the lifting point of the temperature control pressure head at one end, and using the hinge structure of the pressure head in a specific direction, a single-end adhesive lifting form simulating the lever action is formed. This cleverly and efficiently amplifies the small change in adhesive adhesion force into a significant change in the height of the lifting end of the standard test plate, thereby significantly improving the resolution and testing sensitivity of the entire detection system for adhesive viscosity differences.

[0017] (2) By adopting a two-dimensional vision sensor to non-contactly track the optical markings on the test board and working in conjunction with the adaptive swinging articulated pressure head structure, a precise separation point determination and displacement measurement system was constructed. This system can directly and in real time capture the vertical displacement of the test board during the actual peeling process and accurately lock the separation moment and final displacement at the instant when the adhesive force drops sharply, effectively avoiding the interpretation error caused by mechanical lag or contact interference in traditional measurement.

[0018] (3) By designing a temperature control pressure head that integrates temperature control, heat conduction, heat insulation and heat dissipation components, precise programmable control of the pressure head contact surface temperature is achieved, so that the detection process can simulate the use state of the rubber at different actual ambient temperatures, and the test temperature can be flexibly set and changed, thereby evaluating the characteristics of the rubber viscosity changing with temperature, significantly expanding the applicable scenarios and application depth of the detection device.

[0019] (4) By setting up an electrical control system with PLC controller as the core and pre-setting an automated testing process, the entire process from sample positioning, pressing temperature control, lifting and data collection to data processing is realized with one click, which greatly reduces the complexity of operation and human intervention, and ensures the high consistency of each test action and condition, thereby significantly improving the testing efficiency and the objectivity and repeatability of the results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a device for detecting the viscosity of battery terminal sealant according to the present invention. Figure 2 This is a schematic diagram of the lifting state of the device for detecting the viscosity of battery terminal sealant according to the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the bottom structure of a standard test plate for a device for detecting the viscosity of battery terminal sealant of the present invention. Figure 5 This is a schematic diagram of the temperature control pressure head disassembled in the device for detecting the viscosity of battery terminal sealant of the present invention; Figure 6 This is a flowchart illustrating the steps of a method for detecting the viscosity of a battery terminal sealant according to the present invention.

[0021] In the diagram: 1. Base; 101. Mounting groove; 102. Air duct; 11. Support platform; 2. Standard test plate; 201. Groove; 202. Optical mark; 21. Plate body; 22. Roller; 3. Drive mechanism; 4. Adhesion test execution mechanism; 401. Heat dissipation hole; 41. Sliding block; 42. Temperature control pressure head; 421. Pressure head base; 422. Temperature control component; 423. Temperature sensor; 424. Thermally conductive pressure block; 425. Insulation layer; 5. Displacement sensing mechanism; 6. Positioning stop; 7. Control mechanism. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0028] Please see Figure 1-5 The present invention provides a device for detecting the viscosity of battery terminal sealant, comprising a base 1, a standard test plate 2, a drive mechanism 3, an adhesion test execution mechanism 4, and a displacement sensing mechanism 5.

[0029] like Figure 1-3 As shown, the drive mechanism 3 is located on the top of the base 1; the standard test plate 2 is horizontally located on the top of the base 1, and one end of it has a groove 201 for accommodating adhesive; the bonding test execution mechanism 4 includes a sliding block 41 and a temperature control pressure head 42; the sliding block 41 is located on the drive mechanism 3 and is drivenly connected to the drive mechanism 3, and the drive mechanism 3 can drive the sliding block 41 to move longitudinally; the temperature control pressure head 42 is located at the bottom of the sliding block 41 corresponding to the groove 201, and is hinged to the sliding block 41. The swing direction of the temperature control pressure head 42 is consistent with the extension direction of both ends of the standard test plate 2, so as to adapt to the tilt generated by the standard test plate 2 when it is lifted. A pressure sensor is integrated at the hinge point of the sliding block 41 corresponding to the temperature control pressure head 42; the displacement sensing mechanism 5 is located on the base 1 and is used to collect and measure the vertical displacement of the lifted end of the standard test plate 2.

[0030] Specifically, the base 1 serves as the load-bearing and installation foundation for the entire device. The standard test plate 2 is placed horizontally, with a groove 201 machined at one end to accommodate and fix the adhesive sample to be tested. The temperature-controlled pressure head 42 is connected to the bottom of the sliding block 41 via a hinge shaft, and the axis of the hinge shaft is parallel to the length direction of the standard test plate 2, so that the temperature-controlled pressure head 42 only swings in a plane perpendicular to its length direction. When the sliding block 41 is pulled upward, the temperature-controlled pressure head 42 can cause one end of the standard test plate 2 to tilt up through its adhesive force with the adhesive. At the same time, the temperature-controlled pressure head 42 can swing adaptively with the natural tilt of the standard test plate 2, ensuring that the adhesive force is always perpendicular to the contact surface, avoiding the interference of shear force caused by rigid connection, and truly simulating the vertical peeling failure mode of the adhesive. The hinge with integrated pressure sensor can measure the adhesive force in real time and accurately. At the same time, the test point is arranged at one end of the standard test plate 2, forming a mechanical lever.

[0031] Based on the lever principle, a small change in adhesive force is amplified into a significant change in height at the far end of the standard test plate 2. This greatly improves the device's sensitivity and resolution in detecting small differences in adhesive viscosity. The displacement sensing mechanism 5 independently and non-contactly measures the actual displacement of this raised end, providing key parameters for subsequent calculations.

[0032] The drive mechanism 3 is used to provide precise and controllable lifting motion. The specific implementation of the drive mechanism 3 belongs to mature existing technology. In this embodiment, the drive mechanism 3 may include a column, a drive motor, a ball screw and a screw nut. The column is vertically fixed on the base 1. The drive motor, such as a stepper motor or a servo motor, is connected to the ball screw. The screw nut is fixedly connected to the sliding block 41. When the drive motor rotates, the rotational motion is accurately converted into the vertical linear motion of the sliding block 41 through the transmission of the ball screw, thereby realizing the speed and position control of the pressing and lifting actions, and meeting the motion accuracy requirements of this detection device.

[0033] In some embodiments, such as Figure 5As shown, the temperature-controlled press head 42 includes a press head base 421, a temperature control component 422, a temperature sensor 423, and a heat-conducting press block 424. The press head base 421 is hinged to the bottom of the sliding block 41. A heat dissipation hole 401 is provided on the surface of the press head base 421 to adjust the thermal environment inside and outside the press head base 421. The temperature control component 422 is located inside the press head base 421. The heat-conducting press block 424 is fixedly located at the bottom of the press head base 421 and is thermally connected to the temperature control component 422 to transfer the heat generated by the temperature control component 422 to the contact surface with the adhesive. A heat dissipation hole 401 is provided on the side wall of the press head base 421 corresponding to the heat dissipation end of the temperature control component 422 to exhaust the non-target heat generated by the temperature control component 422 during operation outside the press head base 421. The temperature sensor 423 is thermally connected to the heat-conducting press block 424 and is located inside the press head base 421 to sense the temperature of the heat-conducting press block 424 in real time.

[0034] Specifically, the pressure head substrate 421 serves as both the structural body and heat sink. The temperature control component 422 is preferably a semiconductor cooling chip, which has a working end (cold or hot end) and a heat dissipation end. The heat-conducting pressure block 424 is made of a highly thermally conductive material, such as copper, and is tightly fitted to the working end of the temperature control component 422 to ensure efficient heat transfer to the pressing surface at its bottom, thereby precisely controlling the temperature at the interface with the adhesive. The temperature sensor 423 is embedded in or in close contact with the heat-conducting pressure block 424, providing real-time temperature feedback to form a closed-loop control. The sidewalls of the pressure head substrate 421 have heat dissipation... The heat port 401 promptly dissipates waste heat generated at the heat dissipation end of the temperature control component 422, ensuring the efficient and stable operation of the temperature control component 422. This integrated temperature control design eliminates the need for a large, bulky, and slow-responding environmental test chamber, enabling direct, rapid, and precise control of the local temperature at the rubber test point. Users can set any test temperature through the program to simulate the actual usage environment of the rubber in different seasons, regions, or working conditions, and can systematically study the characteristic curve of the rubber viscosity changing with temperature, greatly expanding the scientific research and application value of this device.

[0035] In some embodiments, such as Figure 5 As shown, the temperature control pressure head 42 also includes a heat insulation layer 425; the heat insulation layer 425 is disposed on the inner wall between the pressure head base 421 and the working end of the temperature control component 422, and is used to reduce the loss of target heat generated by the temperature control component 422, so as to improve the temperature control response speed and accuracy.

[0036] Specifically, the heat insulation layer 425 is made of a material with low thermal conductivity, such as aerogel felt or special ceramic fiber, and fills or wraps the space between the working end of the temperature control component 422 and the inner wall of the pressure head substrate 421. Its main function is to physically block the influence of external heat on the target and maintain temperature stability. It significantly improves the thermal efficiency, temperature stability and response speed of the temperature control system, thereby ensuring extreme consistency of test conditions at different set temperatures and further improving the accuracy and reliability of viscosity measurement data.

[0037] In some embodiments, such as Figure 4 As shown, the standard test plate 2 includes a plate body 21 and a roller 22. The plate body 21 is horizontally disposed on the top of the base 1, with one end corresponding to the temperature control head 42. A groove 201 is formed at the end of the plate body 21 corresponding to the temperature control head 42. The roller 22 is disposed at the bottom of the end of the plate body 21 away from the groove 201. When the temperature control head 42 lifts the plate body 21 through the adhesive, the roller 22 is used to convert the sliding friction between the plate body 21 and the top of the base 1 into rolling friction.

[0038] Specifically, the plate 21 is preferably made of a rigid, lightweight, and flat material, such as aluminum alloy or stainless steel, to ensure standardized testing. The roller 22 is rotatably mounted on the bottom of the far end of the plate 21 via a pivot. When the temperature-controlled pressure head 42 adheres to the adhesive and is pulled upwards, causing the plate 21 to tilt up with its near end as the fulcrum, the roller 22 at the bottom of the far end contacts the surface of the base 1 or the support platform 11. At this time, without the roller 22, the far end of the plate 21 will slide against the table surface, and this friction will form an additional resistance torque to resist the lifting of the temperature-controlled pressure head 42, thereby seriously interfering with the true measurement of the adhesive force, reducing sensitivity, and even causing test failure. The introduction of the roller 22 cleverly transforms the harmful sliding friction into rolling friction with minimal resistance, almost eliminating this interfering factor, making the lifting movement of the standard test plate 2 extremely smooth. The adhesive force can be more purely converted into the displacement of the lifted end, ensuring the effective realization of the leverage amplification effect, thereby maximizing the device's ability to capture subtle changes in adhesion force.

[0039] In some embodiments, such as Figure 1-3 As shown, the displacement sensing mechanism 5 includes a two-dimensional vision sensor; the two-dimensional vision sensor is located on the top of the base 1 corresponding to one end of the standard test plate 2 near the groove 201, and the top surface of the base 1 has a mounting groove 101 corresponding to the two-dimensional vision sensor. The two-dimensional vision sensor is located in the mounting groove 101, and the height of the two-dimensional vision sensor is lower than the depth of the mounting groove 101; the bottom of the standard test plate 2 near the groove 201 has an optical mark 202, which corresponds to the field of view of the two-dimensional vision sensor and is used for tracking and identification by the two-dimensional vision sensor.

[0040] Specifically, the displacement sensing mechanism 5 adopts a non-contact machine vision solution, such as an industrial CCD or CMOS camera as a two-dimensional vision sensor, which is embedded in the mounting groove 101 of the base 1 with a fixed focal length lens. Its height is less than the groove depth, which can effectively prevent accidental bumps. The optical mark 202 is a clear pattern printed or etched at a specific position on the bottom of the standard test board 2, such as a "T" line, to ensure that it fits the bottom edge of the standard test board 2. During installation, it is ensured that the field of view of the two-dimensional vision sensor can completely cover the movement range of the optical mark 202 during the test. During the lifting test, the two-dimensional vision sensor takes continuous high-frequency pictures. Since the movement trajectory of the optical mark 202 is a two-dimensional arc when the board 21 is tilted and lifted, the existing image processing algorithm identifies and locates the pixel coordinates of the optical mark 202 in each frame of the image in real time, and calculates the vertical displacement component. This avoids the mechanical interference, friction or installation error that may be caused by the use of contact displacement sensors. It can directly obtain the real vertical displacement of the lifted end of the standard test board 2 without lag and with high precision, ensuring the accuracy of the core measurement data.

[0041] In some embodiments, such as Figure 1-3 As shown, a support platform 11 is provided on the top of the base 1 corresponding to the standard test plate 2; the mounting groove 101 is opened on the support platform 11; the upper surface of the support platform 11 is provided with an air guide channel 102 corresponding to the placement area of ​​the standard test plate 2, which is used to balance the air pressure on the lower surface of the standard test plate 2 when it is lifted, and to prevent vacuum adsorption.

[0042] Specifically, the support platform 11 is installed on the base 1 as a detachable or fixed module, and its upper surface is precision ground to ensure flatness. The air guide channel 102 is a network of shallow grooves milled into the upper surface of the support platform 11. Its position and depth are designed to ensure that when the standard test plate 2 is laid flat, the air passage formed between its lower surface and the air guide channel 102 eliminates the vacuum adsorption effect. When the standard test plate 2 is slowly lifted from one end, if its lower surface is completely sealed with the support surface, a local negative pressure will be formed, generating an additional adsorption force. This force will be superimposed on the adhesive force, causing the measured value to be too large, introducing systematic errors, and possibly making the separation process sluggish and incomplete. The existence of the air guide channel 102 allows external air to quickly flow into the gap between the lower surface of the plate 21 and the support platform 11, timely balancing the air pressure, completely eliminating this negative interference, and ensuring that the standard test plate 2 is only subjected to the adhesive force, its own weight, and a very small rolling friction force during the lifting process, making the mechanical model pure and the measurement results true and reliable.

[0043] In some embodiments, such as Figure 3As shown, a device for detecting the viscosity of battery terminal sealant also includes a positioning block 6; the positioning block 6 is fixedly disposed on the upper surface of the support platform 11 and is located on the side away from the groove 201 where the standard test plate 2 is placed; the positioning block 6 has a positioning surface that matches the end and side of the standard test plate 2, and is used to quickly position the standard test plate 2 placed on the support platform 11.

[0044] Specifically, the positioning block 6 is typically L-shaped, with its two vertical inner surfaces forming a precise positioning reference surface. When placing the standard test plate 2, the operator only needs to push its two adjacent edges—the end edge furthest from the groove 201 and one side edge—to the reference surface of the positioning block 6. This allows for precise lateral (X-direction) and longitudinal (Y-direction) positioning within seconds. Not only is the operation extremely simple and quick, avoiding the tediousness and errors of manual alignment each time, but more importantly, it ensures that the relative positional relationship between the groove 201 on the standard test plate 2 and the upper temperature control pressure head 42, and the bottom optical mark 202 and the two-dimensional vision sensor, is absolutely consistent during each test. This highly repeatable spatial relationship is the physical basis for obtaining highly repeatable and comparable test data and is an indispensable part of achieving standardization and automation of the testing process.

[0045] In some embodiments, such as Figure 1-2 As shown, a device for detecting the viscosity of battery terminal sealant also includes a control mechanism 7. The control mechanism 7 includes a PLC controller and a control panel. The PLC controller is integrated inside the base 1 and is electrically connected to the drive mechanism 3, pressure sensor, displacement sensing mechanism 5 and temperature control head 42. It is used to coordinate the actions of each mechanism according to a preset program and process sensor data. The control panel is located on the outer surface of the base 1 and is used for human-machine interaction to set parameters, start and stop the test and display the results.

[0046] Specifically, the PLC controller of the control mechanism 7 is electrically connected to the aforementioned functional components. Its working principle, control logic program, and circuit connection method are all existing mature technologies in the field, used to schedule the various mechanisms to work together according to preset logic. The control panel is usually a touch screen integrated on the surface of the device, providing an operating interface for the user. Through this panel, the operator can easily set the parameters required for the test, such as pressing pressure, holding time, lifting speed, and target temperature, and start the test process with one click. The PLC controller then automatically controls the drive mechanism 3, temperature control head 42, etc., to perform actions in sequence, and simultaneously collects and processes sensor data, finally displaying the calculated viscosity characterization value on the panel. This design integrates the complex process that originally required manual step-by-step operation into a fully automated production line, greatly simplifying the operation, reducing human error, and ensuring a high degree of consistency between the test conditions and execution steps each time. It is the key to improving the overall usability, reliability, and repeatability of the test results of the device.

[0047] Please see Figure 6 The present invention also provides a method for detecting the viscosity of battery terminal sealant. The method uses the aforementioned device for detecting the viscosity of battery terminal sealant to detect the viscosity of the sealant. The detection method includes: S1: Fill the groove of the standard test plate with the adhesive to be tested; place the standard test plate on the upper surface of the support platform and make the end away from the groove abut against the positioning block to complete the horizontal and vertical positioning, and ensure that the groove is perpendicular to the temperature control pressure head of the bonding test actuator.

[0048] Specifically, this step is the preparation and positioning stage before testing; the positioning block is used to forcibly limit the standard test plate placed on the support platform to ensure that its groove is automatically and accurately aligned with the temperature control head above, thus eliminating operational errors in the sample loading process from the root.

[0049] S2: The PLC controller controls the drive mechanism to drive the sliding block and temperature control head to descend, so that the temperature control head is embedded in the groove and fully contacts the adhesive. The preset pressure is used to press and hold for a preset time to complete the bonding. At the same time, the PLC controller controls the temperature control component to adjust the temperature so that the temperature of the heat-conducting pressure block reaches and stabilizes at the test set value.

[0050] Specifically, this step simultaneously establishes a stable test interface; while the PLC controller controls the temperature-controlled pressure head to press the adhesive material at constant pressure, it also activates its internal temperature control components to enable the heat-conducting pressure block to quickly reach and maintain the set temperature, thereby simultaneously achieving mechanical bonding and thermal field balance.

[0051] S3: Record the start time of lifting and control the drive mechanism through the PLC controller to lift the temperature control head vertically upward at a preset constant speed. The temperature control head causes one end of the standard test plate to tilt up through the adhesive force. During this process: the vertical adhesive force on the temperature control head is collected in real time through the pressure sensor; the optical mark on the bottom of the standard test plate is identified through the two-dimensional vision sensor, and the vertical displacement of the lifted end of the standard test plate is collected in real time in a non-contact manner.

[0052] Specifically, this step involves core data acquisition; under constant speed lifting, the system uses pressure sensors and two-dimensional vision sensors to synchronously and in real time acquire the adhesive force and the actual vertical displacement of the lifted end of the standard test board, directly obtaining the dynamic correspondence between the two during the peeling process.

[0053] S4: Continue to pull and collect data until the vertical adhesive force collected by the pressure sensor drops sharply to near zero, which represents the moment when the adhesive material and the temperature control pressure head break apart; the PLC controller then determines that the adhesion has failed and locks this moment as the separation moment, and locks the vertical displacement collected by the two-dimensional vision sensor at this moment as the final separation displacement. Specifically, this step is the objective endpoint determination; the PLC controller monitors the pressure sensor signal in real time, and immediately determines the moment of material separation when the pressure drops sharply, and simultaneously locks the displacement value measured by the two-dimensional vision sensor at this moment as the final separation displacement, so as to achieve the instantaneous and accurate capture of the failure point.

[0054] S5: Based on the separation time, constant lifting speed, final separation displacement, known weight of the standard test plate, and cross-sectional area of ​​the temperature-controlled pressure head contact surface, the viscosity characterization value of the rubber compound is calculated and output through the preset calculation model inside the control mechanism.

[0055] Specifically, this step completes the performance quantification; the system automatically combines the locked time, displacement and other parameters with the pre-stored constants such as board weight and area, calculates through the built-in model, and finally outputs a single quantitative index characterizing the adhesive adhesion performance.

[0056] In some embodiments, the viscosity characterization value of the adhesive compound is calculated and output based on a preset calculation model within the control mechanism, using the separation time, constant lifting speed, final separation displacement, known weight of the standard test plate, and cross-sectional area of ​​the temperature-controlled indenter contact surface. This includes: The lifting duration is determined based on the separation time and the lifting start time, and the theoretical displacement of the temperature-controlled pressure head is obtained by combining the constant lifting speed. By comparing the final separation displacement with the theoretical displacement, the displacement difference caused by the viscoelastic properties of the rubber compound is obtained. By combining the displacement difference, the final separation displacement, the weight of the standard test plate, and the cross-sectional area of ​​the temperature-controlled pressure head, the viscosity characterization value of the adhesive is calculated using a predetermined algorithm model.

[0057] Specifically, after obtaining several core parameters through precise measurement by the device, the control mechanism calls a preset calculation model for processing. The calculation is first based on the separation time. At the start of lifting Calculate the lifting duration : ; Combined with the preset constant lifting speed The theoretical displacement that the temperature-controlled pressure head should produce under the ideal condition of assuming an absolutely rigid connection can be calculated. : ; However, since the adhesive material is not a rigid body, it undergoes viscoelastic deformation under stress, and the measurement system also experiences slight deformation. Therefore, the final separation displacement H of the raised end of the standard test plate, directly measured by the two-dimensional vision sensor, differs from the theoretical displacement mentioned above. There are inherent differences; by calculating the difference between the two. This is used to characterize the displacement contributed by both the viscoelastic properties of the rubber compound and the system's flexibility:

[0058] ; Ultimately, in order to obtain quantitative indicators characterizing the viscosity of the rubber compound... The pre-set algorithm model will perform calculations by combining the key parameters obtained from direct measurement and indirect calculation. In this embodiment, the following calculation model is adopted: ; in, The final output viscosity value of the rubber compound; K is the device calibration coefficient, which is obtained by systematically calibrating the entire detection device using standard samples with known viscosity, and is used to map the original calculated value to a practical characterization scale; This represents the work required to overcome gravity to lift a standard test plate of mass m to a vertical height H. It is the acceleration due to gravity; Used to quantify the additional energy consumed by the viscoelastic deformation of the rubber compound. The aforementioned displacement difference, and The model parameters reflecting the specific viscoelastic response of the rubber compound are also determined through a calibration procedure; A is the cross-sectional area of ​​the contact surface between the temperature-controlled pressure head's heat-conducting block and the rubber compound. This parameter is used to normalize the total energy to a unit area, resulting in a viscosity characterization value for the rubber compound. It has universality and comparability.

[0059] This model characterizes the viscosity of the rubber compound. Related to the two aspects of "work done against gravity" and "energy dissipation due to viscoelastic deformation," and with area normalization, the key improvement of this invention lies in its unique detection device—namely, a single-end lever lifting mechanism, a hinged pressure head, and two-dimensional visual measurement—which enables high-precision and highly repeatable acquisition of the input parameters required by the model to accurately reflect the behavior of the rubber compound, particularly H. This allows the existing algorithm model to be successfully applied to standard chemical condition simulation tests of battery terminal sealant, thereby outputting stable and reliable viscosity characterization values ​​for the sealant.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the viscosity of battery terminal sealant, characterized in that, It includes a base (1), a standard test plate (2), a drive mechanism (3), an adhesive test execution mechanism (4), and a displacement sensing mechanism (5), wherein, The drive mechanism (3) is located on the top of the base (1); The standard test plate (2) is horizontally positioned on the top of the base (1), and a groove (201) for accommodating the adhesive is provided at one end. The bonding test actuator (4) includes a sliding block (41) and a temperature-controlled pressure head (42). The sliding block (41) is mounted on the driving mechanism (3) and is driven to connect with the driving mechanism (3). The driving mechanism (3) can drive the sliding block (41) to move longitudinally. The temperature control head (42) is located at the groove (201) at the bottom of the sliding block (41) and is hinged to the sliding block (41). The swing direction of the temperature control head (42) is consistent with the extension direction of both ends of the standard test plate (2) so as to adapt to the tilt generated by the standard test plate (2) when it is lifted. The sliding block (41) is integrated with a pressure sensor at the hinge point of the temperature control head (42). The displacement sensing mechanism (5) is mounted on the base (1) and is used to collect and measure the vertical displacement of the raised end of the standard test plate (2).

2. The device for detecting the viscosity of battery terminal sealant according to claim 1, characterized in that, The temperature-controlled pressure head (42) includes a pressure head base (421), a temperature control component (422), a temperature sensor (423), and a heat-conducting pressure block (424), wherein, The pressure head base (421) is hinged to the bottom of the sliding block (41), and the surface of the pressure head base (421) is provided with heat dissipation holes (401) for adjusting the thermal environment inside and outside the pressure head base (421); The temperature control component (422) is located inside the pressure head base (421); The heat-conducting pressure block (424) is fixedly disposed at the bottom of the pressure head base (421), and is thermally connected to the temperature control component (422) to transfer the heat generated by the temperature control component (422) to the contact surface with the adhesive. The side wall of the pressure head base (421) is provided with heat dissipation holes (401) corresponding to the heat dissipation end of the temperature control component (422) to dissipate non-target heat generated when the temperature control component (422) is working outside the pressure head base (421); The temperature sensor (423) is thermally connected to the heat-conducting pressure block (424) and is located inside the pressure head base (421) to sense the temperature of the heat-conducting pressure block (424) in real time.

3. The device for detecting the viscosity of battery terminal sealant according to claim 2, characterized in that, The temperature control head (42) also includes a heat insulation layer (425); The heat insulation layer (425) is disposed on the inner wall between the pressure head base (421) and the working end of the temperature control component (422) to reduce the loss of the target heat generated by the temperature control component (422) and improve the temperature control response speed and accuracy.

4. The device for detecting the viscosity of battery terminal sealant according to claim 1, characterized in that, The standard test plate (2) includes a plate body (21) and rollers (22), wherein, The plate (21) is horizontally disposed on the top of the base (1), with one end corresponding to the temperature control head (42), and the groove (201) is opened at the end of the plate (21) corresponding to the temperature control head (42); The roller (22) is located at the bottom of the end of the plate (21) away from the groove (201); When the temperature-controlled pressure head (42) lifts the plate (21) through the adhesive material, the roller (22) is used to convert the sliding friction between the plate (21) and the top of the base (1) into rolling friction.

5. The device for detecting the viscosity of battery terminal sealant according to claim 1, characterized in that, The displacement sensing mechanism (5) includes a two-dimensional vision sensor; The two-dimensional vision sensor is located on the top of the base (1) at one end of the standard test plate (2) near the groove (201). The top surface of the base (1) is provided with a mounting groove (101) corresponding to the two-dimensional vision sensor. The two-dimensional vision sensor is located in the mounting groove (101), and the height of the two-dimensional vision sensor is lower than the depth of the mounting groove (101). The standard test plate (2) has an optical mark (202) at the bottom of one end near the groove (201). The optical mark (202) corresponds to the field of view of the two-dimensional vision sensor and is used for the two-dimensional vision sensor to track and identify.

6. The device for detecting the viscosity of battery terminal sealant according to claim 5, characterized in that, The base (1) is provided with a support platform (11) at the top corresponding to the standard test plate (2); The mounting slot (101) is provided on the support platform (11); The upper surface of the support platform (11) is provided with an air guide channel (102) corresponding to the placement area of ​​the standard test plate (2), which is used to balance the air pressure on the lower surface of the standard test plate (2) when it is lifted, and to prevent vacuum adsorption.

7. The device for detecting the viscosity of battery terminal sealant according to claim 6, characterized in that, It also includes a positioning stop (6); The positioning block (6) is fixed on the upper surface of the support platform (11) and is located on the side away from the groove (201) where the standard test plate (2) is placed; The positioning block (6) has a positioning surface that matches the end and side of the standard test plate (2) for quickly positioning the standard test plate (2) placed on the support platform (11).

8. The device for detecting the viscosity of battery terminal sealant according to claim 1, characterized in that, It also includes a control mechanism (7), which includes a PLC controller and a control panel, wherein, The PLC controller is integrated inside the base (1) and is electrically connected to the drive mechanism (3), pressure sensor, displacement sensing mechanism (5) and temperature control head (42) to coordinate the actions of each mechanism and process sensor data according to a preset program. The control panel is located on the outer surface of the base (1) and is used for human-computer interaction to set parameters, start and stop tests and display results.

9. A method for detecting the viscosity of battery terminal sealant, characterized in that, The viscosity of the battery terminal sealant is detected using the viscosity detection device according to any one of claims 1-8, wherein the detection method includes: S1: Fill the groove of the standard test plate with the adhesive to be tested; place the standard test plate on the upper surface of the support platform and make the end away from the groove abut against the positioning block to complete the horizontal and vertical positioning, and ensure that the groove is perpendicular to the temperature control pressure head of the bonding test actuator. S2: The PLC controller controls the drive mechanism to drive the sliding block and temperature control head to descend, so that the temperature control head is embedded in the groove and fully contacts the adhesive. The preset pressure is used to press and hold for a preset time to complete the bonding. At the same time, the PLC controller controls the temperature control component to adjust the temperature so that the temperature of the heat-conducting pressure block reaches and stabilizes at the test set value. S3: Record the start time of lifting and control the drive mechanism via PLC controller to lift the temperature control head vertically upward at a preset constant speed. The temperature control head causes one end of the standard test board to tilt up through adhesive force. During this process: the vertical adhesive force on the temperature control head is collected in real time by pressure sensor; the optical mark on the bottom of the standard test board is identified by two-dimensional vision sensor, and the vertical displacement of the lifted end of the standard test board is collected in real time in a non-contact manner. S4: Continue to pull and collect data until the vertical adhesive force collected by the pressure sensor drops sharply to near zero, which represents the moment when the adhesive material and the temperature control pressure head break apart; the PLC controller then determines that the adhesion has failed and locks this moment as the separation moment, and locks the vertical displacement collected by the two-dimensional vision sensor at this moment as the final separation displacement. S5: Based on the separation time, constant lifting speed, final separation displacement, known weight of the standard test plate, and cross-sectional area of ​​the temperature-controlled pressure head contact surface, the viscosity characterization value of the rubber compound is calculated and output through the preset calculation model inside the control mechanism.

10. The method for detecting the viscosity of battery terminal sealant according to claim 9, characterized in that, The process of calculating and outputting the viscosity characterization value of the adhesive material through a pre-set calculation model within the control mechanism includes: The lifting duration is determined based on the separation time and the lifting start time, and the theoretical displacement of the temperature-controlled pressure head is obtained by combining the constant lifting speed. By comparing the final separation displacement with the theoretical displacement, the displacement difference caused by the viscoelastic properties of the rubber compound is obtained. By combining the displacement difference, the final separation displacement, the weight of the standard test plate, and the cross-sectional area of ​​the temperature-controlled pressure head, the viscosity characterization value of the adhesive is calculated using a predetermined algorithm model.

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