Composite current collector temperature-resistant testing device

Abstract

The utility model discloses a kind of composite current collector temperature-resistant testing devices, belong to composite current collector testing device technical field, including shell, the shell front side is equipped with taking and placing door, the shell inside is equipped with tensile detection mechanism, the tensile detection mechanism is used to fix the two ends of composite current collector and stretch composite current collector, the tensile detection mechanism includes clamping component, support component and stretching component, the clamping component number is equipped with two, wherein one clamping component is equipped with detection structure between shell inner wall. The utility model realizes the stable construction of different temperature environment by the temperature regulating equipment of prior art, and the controllable tension of movable clamp is applied to ensure that composite current collector surface is flat and stress is uniform, can accurately obtain the tensile condition of composite current collector under specific temperature and tension, effectively solve the problem that prior art cannot accurately evaluate its temperature-resistant performance.

Description

Technical Field

[0001] This utility model relates to a composite current collector temperature resistance testing device, belonging to the technical field of composite current collector testing devices. Background Technology

[0002] Composite current collectors are currently an important solution for improving battery safety, and their performance depends on the basic properties of the original film and subsequent processing technology. In practical applications, composite current collectors need to maintain good performance under various temperature environments: at high temperatures, the increased internal temperature of the battery will generate thermal stress on the composite current collector; at low temperatures, the material properties of the composite current collector may change; especially under extreme temperature conditions, the impact of performance changes on the battery is more significant. Therefore, to ensure the safe and stable operation of the battery, it is necessary to accurately test the temperature resistance performance of the composite current collector.

[0003] However, in the existing technology, there is a lack of a dedicated testing device that can specifically simulate different temperature environments and apply tension to the composite current collector under such environments to test its tensile properties. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a composite current collector temperature resistance testing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A composite current collector temperature resistance testing device includes a housing, a pick-and-place door installed on the front side of the housing, and a tensile testing mechanism provided inside the housing;

[0007] The tensile testing mechanism is used to fix both ends of the composite current collector and to stretch the composite current collector.

[0008] The tensile testing mechanism includes a clamping component, a support component, and a tensile component;

[0009] The number of clamping components is set to two. One of the clamping components is provided with a detection structure between itself and the inner wall of the housing. This clamping component is connected to the inner wall of the housing through the detection structure. The other clamping component is connected to the tensioning component. The two clamping components are used to fix the two ends of the composite current collector.

[0010] The support assembly is used to uniformly support the unfolded composite current collector;

[0011] The stretching component is used to drive one of the clamping components to move;

[0012] The housing is equipped with a temperature regulating device;

[0013] In this scheme, firstly, the composite current collector sample is placed through the loading and unloading door on the front side of the housing. Two clamping components in the tensile testing mechanism fix both ends of the sample. One clamping component is connected to the inner wall of the housing through the testing structure to realize the function of the fixed end, while the other is connected to the tensile component as the movable end. The support component provides uniform support for the unfolded composite current collector to avoid wrinkles or damage to the composite current collector surface due to uneven local stress. Subsequently, the tensile component drives the clamping component at the movable end to move, applying a stable tension to the composite current collector. At the same time, the temperature regulation device inside the housing is activated to regulate the ambient temperature to the target test temperature. Finally, the tensile properties of the composite current collector are tested under specific temperature and tension conditions to evaluate its temperature resistance characteristics.

[0014] Preferably, the clamping assembly includes a fixed frame, a threaded rod is threadedly connected to the side wall of the fixed frame, a clamping plate is fixedly connected to one end of the threaded rod, and a knob is fixedly connected to the other end of the threaded rod;

[0015] The clamping plate has two first guide rods fixedly connected to its side wall. Both first guide rods pass through the fixed frame and are slidably connected to the fixed frame.

[0016] In this solution, the fixed frame of the clamping component is the basic load-bearing structure. When it is necessary to fix the composite current collector (i.e., the composite current collector membrane material, hereinafter referred to as the membrane material in this application), the operator rotates the knob at the end of the threaded rod. Since the threaded rod is threadedly connected to the side wall of the fixed frame, the rotation of the knob will drive the threaded rod to move axially, thereby pushing the clamping plate closer to the membrane material until it is tightly fitted with the membrane material, thus achieving the clamping and fixing of the membrane material. At the same time, the two first guide rods fixed to the side wall of the clamping plate pass through the fixed frame and are slidably connected to the fixed frame. During the movement of the clamping plate, the first guide rods can limit the movement trajectory of the clamping plate, prevent it from deviating or tilting due to force, ensure that the clamping force is evenly applied to the end of the membrane material, and prevent the membrane material from being damaged during clamping or slipping during testing.

[0017] Preferably, the detection structure includes a first mounting component, the side wall of the first mounting component is fixedly connected to the inner wall of the housing, and a second mounting component is provided above the first mounting component, the side wall of the second mounting component is fixedly connected to an adjacent fixing frame;

[0018] A tension sensor is provided between the first mounting component and the second mounting component. The bottom of the tension sensor is fixedly connected to the first mounting component, and the top of the tension sensor is fixedly connected to the second mounting component.

[0019] The tension sensor is provided with a second guide rod on both sides. The bottom of the two second guide rods is fixedly connected to the first mounting component, the top of the two second guide rods is provided through the second mounting component, and the two second guide rods are slidably connected to the second mounting component.

[0020] In this design, the detection structure is fixed to the inner wall of the housing via a first mounting component, forming a stable mounting base. The second mounting component is connected to the adjacent clamping assembly frame. When the tensioning assembly applies tension to the membrane material, the tension is transmitted to the second mounting component through the clamping assembly. The tension sensor between the first and second mounting components can sense the force between them in real time. This force is equal to the tension on the membrane material, thus achieving accurate detection and feedback of the tension magnitude during the test. In addition, the second guide rods on both sides of the tension sensor are fixed to the first mounting component and slidably connected to the second mounting component, respectively. When the second mounting component undergoes a slight displacement due to tension changes, the second guide rods can ensure that the second mounting component moves along a fixed direction, preventing lateral displacement and ensuring the accuracy of the tension sensor's detection data, while also protecting the tension sensor from damage by lateral forces.

[0021] Preferably, the support assembly includes two support rollers, the ends of which are rotatably connected to the inner wall of the housing, and the two support rollers are in the same transverse plane.

[0022] In this design, the ends of the two support rollers of the support assembly are rotatably connected to the inner wall of the housing and are located in the same transverse plane, forming a parallel support structure. When the composite current collector membrane is fixed and unfolded by the two clamping components, the lower surface of the membrane contacts the outer periphery of the two support rollers. Through their own rotational characteristics, the support rollers can rotate synchronously with the movement of the membrane during the stretching process, reducing the friction between the membrane and the support rollers and avoiding scratches or damage to the membrane surface due to friction. At the same time, the two parallel and coplanar support rollers can provide uniform support for the membrane, preventing the membrane from sagging due to its own weight or local wrinkles caused by uneven stress, ensuring that the membrane remains flat during the test and guaranteeing the reliability of the tensile test results.

[0023] Preferably, the tensioning assembly includes a counterweight structure and a lifting structure;

[0024] The counterweight structure is used to increase the weight of the clamping assembly;

[0025] The lifting structure is used to guide the clamping assembly to move up and down;

[0026] In this design, the tensioning assembly consists of a counterweight structure and a lifting structure working together. The counterweight structure provides a stable and adjustable tension source for the membrane material by increasing the weight of the clamping assembly. By increasing or decreasing the number of counterweights, the gravity applied to the clamping assembly can be changed, thereby adjusting the tension on the membrane material. The lifting structure guides the movement direction of the clamping assembly. When the counterweight structure pulls the clamping assembly with gravity, the lifting structure restricts the clamping assembly to move only in the set lifting direction, preventing it from deviating or swaying during movement. This ensures that the tension is stably applied to the axial direction of the membrane material, achieving precise stretching of the membrane material and providing a reliable tensioning drive for temperature resistance testing under different tension conditions.

[0027] Preferably, the counterweight structure includes a fixed plate, the sidewall of which is fixedly connected to the rear side of the housing, two third guide rods are fixedly connected to the top of the fixed plate, a support plate is provided between the two third guide rods, both third guide rods pass through the support plate and are slidably connected to the support plate, two limiting rods are fixedly connected to the top of the support plate, a plurality of counterweight blocks are provided between the two limiting rods, and two limiting holes are opened on the surface of each of the plurality of counterweight blocks, the two limiting holes respectively matching the two limiting rods;

[0028] An electric push rod is provided between the two third guide rods. The bottom of the electric push rod is fixedly connected to the fixed plate, and the output end of the electric push rod abuts against the bottom of the support plate.

[0029] In this design, the fixed plate of the counterweight structure is fixed to the rear of the housing, providing stable support for the entire structure. Two third guide rods are slidably connected to the support plate, restricting the movement direction of the support plate. Two limiting rods on the top of the support plate are used to position the counterweight blocks. The counterweight blocks are fitted onto the limiting rods through limiting holes on the surface. The operator can increase or decrease the number of counterweight blocks according to the required tension for the test, changing the total weight of the support plate and counterweight blocks, which is then transmitted to the clamping assembly through the support plate to achieve tension adjustment. In addition, the electric push rod between the two third guide rods can assist in controlling the position of the support plate. When installing or replacing the counterweight blocks, the output end of the electric push rod pushes the support plate upward, reducing the pressure of the counterweight blocks on the support plate and making it easier for the operator to pick up and put down the counterweight blocks. During testing, the output end of the electric push rod retracts, and the support plate moves downward under the gravity of the counterweight blocks. The lifting structure drives the clamping assembly to apply tension to the membrane material, ensuring that the tension application process is stable and controllable.

[0030] Preferably, the lifting structure includes a mounting frame that extends through the rear wall of the housing. A fourth guide rod is provided inside the mounting frame. A lifting component is slidably disposed on the outer periphery of the middle part of the fourth guide rod. One end of the lifting component is fixedly connected to the end of an adjacent fixed frame, and the other end of the lifting component is fixedly connected to a support plate.

[0031] In this design, the mounting frame of the lifting structure penetrates the rear wall of the housing, forming a fixed mounting channel. The fourth guide rod inside the mounting frame provides a sliding track for the lifting component. One end of the lifting component is connected to the adjacent clamping component fixing frame, and the other end is fixed to the counterweight structure's support plate, establishing a transmission connection between the counterweight structure and the clamping component. When the counterweight structure's support plate rises and falls under the action of gravity, it will drive the lifting component to slide along the axial direction of the fourth guide rod, thereby driving the clamping component to rise and fall synchronously. The fourth guide rod can strictly limit the movement trajectory of the lifting component, ensuring that the lifting component only moves in the vertical direction, avoiding lateral displacement of the clamping component during the stretching process, ensuring that the tension on the membrane material is always in the axial direction, and ensuring the stability and accuracy of the tensile test.

[0032] Preferably, a baffle is provided through the middle of the mounting frame, the baffle is slidably connected to the mounting frame, the lifting component is provided through the baffle, and the lifting component is fixedly connected to the baffle;

[0033] In this design, the baffle passes through the middle of the mounting frame and is slidably connected to it, while also being fixedly connected to the lifting component. Since the mounting frame passes through the rear wall of the housing, it creates an opening in the housing. The baffle can cover this opening to prevent the internal temperature of the housing from exchanging with the outside environment during the test, ensuring the stability of the internal temperature environment and avoiding temperature fluctuations from affecting the test results. In addition, when the lifting component moves up and down along the fourth guide rod, it will drive the baffle to slide synchronously along the mounting frame, ensuring that the baffle always maintains a sealed state over the opening of the mounting frame. Regardless of the lifting position of the clamping component, the sealing of the housing can be ensured, providing a stable temperature environment for the temperature resistance test.

[0034] Preferably, the length of the baffle is more than twice the length of the mounting frame;

[0035] In this design, the baffle length is set to be more than twice the length of the mounting frame. This design ensures that the baffle can always completely cover the opening of the mounting frame during the entire stroke of the lifting component moving the baffle along the mounting frame. Even if the lifting component is at the highest or lowest end of the stroke, both ends of the baffle can still extend beyond the upper and lower edges of the mounting frame, preventing the mounting frame opening from being exposed due to insufficient baffle length. This completely blocks the temperature exchange between the inside of the housing and the outside, maintains a constant internal temperature of the housing, provides accurate and stable temperature conditions for the composite current collector temperature resistance test, and ensures the validity of the test data.

[0036] Preferably, the sidewall of the clamping plate is provided with an anti-slip pad;

[0037] In this design, the anti-slip pads bonded to the sidewalls of the clamping plate are made of a material with a high coefficient of friction. When the clamping plate contacts the composite current collector membrane and a clamping force is applied, the anti-slip pads increase the friction between the clamping plate and the membrane, effectively preventing the membrane from slipping off the clamping plate and the fixing frame due to tension during the test, ensuring the smooth progress of the test. At the same time, the anti-slip pads have a certain degree of elasticity, which can buffer the rigid pressure of the clamping plate on the membrane, preventing the membrane ends from being indented or damaged due to excessive clamping force, protecting the integrity of the membrane, ensuring the stability of the test sample before and after the test, and improving the accuracy of the test results.

[0038] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0039] The device achieves stable construction in different temperature environments through existing temperature control equipment. With the help of movable clamps to apply controllable tension and stainless steel rollers to ensure that the surface of the composite current collector membrane is flat and the force is uniform, it can accurately obtain the tensile condition of the composite current collector under specific temperature and tension, effectively solving the problem that existing technologies are difficult to accurately evaluate its temperature resistance performance. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 This is a first-view perspective perspective view of the present invention;

[0042] Figure 2 This is a second-view perspective perspective view of the present invention;

[0043] Figure 3 This is a schematic diagram of the tensile testing mechanism of this utility model;

[0044] Figure 4 This is a schematic diagram of the clamping component of this utility model;

[0045] Figure 5 This is a schematic diagram of the lifting structure of this utility model;

[0046] Figure 6 This is a schematic diagram of the detection structure of this utility model;

[0047] Figure 7 This is the counterweight of this utility model.

[0048] In the picture:

[0049] 1. Housing; 11. Access door;

[0050] 2. Tensile testing agency;

[0051] 21. Clamping assembly; 211. Fixing frame; 212. Threaded rod; 213. Clamping plate; 214. Knob; 215. First guide rod;

[0052] 22. Support assembly; 221. Support roller;

[0053] 23. Tension assembly;

[0054] 231. Counterweight structure; 2311. Fixing plate; 2312. Third guide rod; 2313. Support plate; 2314. Limiting rod; 2315. Counterweight block; 2316. Limiting hole; 2317. Electric

[0055] Putter;

[0056] 232. Lifting structure; 2321. Mounting frame; 2322. Fourth guide rod; 2323. Lifting component;

[0057] 24. Detection structure; 241. First mounting component; 242. Second mounting component; 243. Tension sensor; 244. Second guide rod;

[0058] 25. Temperature control equipment;

[0059] 3. Baffle; 4. Anti-slip mat. Detailed Implementation

[0060] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0061] Please see Figure 1 and 2 This utility model provides a technical solution:

[0062] A composite current collector temperature resistance testing device includes a housing 1, a pick-up and put-out door 11 installed on the front side of the housing 1, and a tensile testing mechanism 2 provided inside the housing 1.

[0063] The tensile testing mechanism 2 is used to fix both ends of the composite current collector and to stretch the composite current collector;

[0064] The tensile testing mechanism 2 includes a clamping assembly 21, a support assembly 22, and a tensile assembly 23;

[0065] The number of clamping components 21 is set to two. One clamping component 21 is provided with a detection structure 24 between it and the inner wall of the housing 1. This clamping component 21 is connected to the inner wall of the housing 1 through the detection structure 24. The other clamping component 21 is connected to the tensioning component 23. The two clamping components 21 are used to fix the two ends of the composite current collector.

[0066] The support component 22 is used to uniformly support the unfolded composite current collector;

[0067] The stretching component 23 is used to drive one of the clamping components 21 to move;

[0068] The housing 1 is equipped with a temperature regulating device 25.

[0069] For further information, please refer to [link / reference]. Figure 2 and 3 The clamping assembly 21 includes a fixed frame 211, a threaded rod 212 is threadedly connected to the side wall of the fixed frame 211, a clamping plate 213 is fixedly connected to one end of the threaded rod 212, and a knob 214 is fixedly connected to the other end of the threaded rod 212.

[0070] Two first guide rods 215 are fixedly connected to the side wall of the clamping plate 213. Both first guide rods 215 are set through the fixed frame 211 and are slidably connected to the fixed frame 211.

[0071] Specifically, the fixed frame 211 is made of aluminum alloy in one piece, which is lightweight and has high structural strength, avoiding the impact of excessive weight on the tensile test accuracy; the surface of the threaded rod 212 is coated with polytetrafluoroethylene grease, and the grease thickness is controlled at 0.1-0.2mm, which reduces the frictional loss at the threaded connection between the threaded rod 212 and the fixed frame 211, and also prevents the threads from jamming due to high and low temperature environments.

[0072] For further information, please refer to [link / reference]. Figure 6 The detection structure 24 includes a first mounting member 241, the side wall of the first mounting member 241 is fixedly connected to the inner wall of the housing 1, and a second mounting member 242 is provided above the first mounting member 241, the side wall of the second mounting member 242 is fixedly connected to the adjacent fixed frame 211;

[0073] A tension sensor 243 is provided between the first mounting component 241 and the second mounting component 242. The bottom of the tension sensor 243 is fixedly connected to the first mounting component 241, and the top of the tension sensor 243 is fixedly connected to the second mounting component 242.

[0074] The tension sensor 243 has a second guide rod 244 on both sides. The bottom of the two second guide rods 244 is fixedly connected to the first mounting member 241, and the top of the two second guide rods 244 is set through the second mounting member 242. The two second guide rods 244 are slidably connected to the second mounting member 242.

[0075] Specifically, the tension sensor 243 is an S-type tension sensor 243 with a range of 0-500N and an accuracy class of 0.1, ensuring accurate capture of minute tension changes.

[0076] For further information, please refer to [link / reference]. Figure 3 The support assembly 22 includes a support roller 221. The number of support rollers 221 is set to two. The ends of the two support rollers 221 are rotatably connected to the inner wall of the housing 1. The two support rollers 221 are in the same transverse plane.

[0077] The specific support roller 221 is made of 304 stainless steel, with a roller diameter of 20mm and a length that is 20mm longer than the width of the membrane sample, to ensure that the edges of the membrane can also be stably supported.

[0078] For further information, please refer to [link / reference]. Figure 2 The tensioning component 23 includes a counterweight structure 231 and a lifting structure 232;

[0079] The counterweight structure 231 is used to increase the weight of the clamping assembly 21;

[0080] The lifting structure 232 is used to guide the clamping assembly 21 to move up and down;

[0081] Specifically, applying low-temperature grease to the guide rail surface can maintain good lubrication at -50℃, preventing increased friction between the guide rail and the slider due to low temperatures.

[0082] For further information, please refer to [link / reference]. Figure 2 The counterweight structure 231 includes a fixed plate 2311. The side wall of the fixed plate 2311 is fixedly connected to the rear side of the housing 1. Two third guide rods 2312 are fixedly connected to the top of the fixed plate 2311. A support plate 2313 is provided between the two third guide rods 2312. Both third guide rods 2312 are provided through the support plate 2313 and are slidably connected to the support plate 2313. Two limiting rods 2314 are fixedly connected to the top of the support plate 2313. Multiple counterweight blocks 2315 are provided between the two limiting rods 2314. Two limiting holes 2316 are opened on the surface of each of the multiple counterweight blocks 2315. The two limiting holes 2316 are respectively matched with the two limiting rods 2314.

[0083] An electric push rod 2317 is provided between the two third guide rods 2312. The bottom of the electric push rod 2317 is fixedly connected to the fixed plate 2311, and the output end of the electric push rod 2317 abuts against the bottom of the support plate 2313.

[0084] Specifically, the third guide rod 2312 is made of 45 steel and the surface is heat-treated to achieve a hardness of HRC28-32, which improves the bending resistance of the guide rod.

[0085] For further information, please refer to [link / reference]. Figure 5 The lifting structure 232 includes a mounting frame 2321, which is installed through the rear wall of the housing 1. A fourth guide rod 2322 is provided inside the mounting frame 2321. A lifting component 2323 is slidably arranged on the outer periphery of the middle part of the fourth guide rod 2322. One end of the lifting component 2323 is fixedly connected to the end of the adjacent fixed frame 211, and the other end of the lifting component 2323 is fixedly connected to the support plate 2313.

[0086] Specifically, the fourth guide rod 2322 uses an optical axis with a diameter of 12mm and is made of 40Cr material. The surface is chrome-plated with a chrome layer thickness of 20μm to improve the wear resistance and rust prevention performance of the guide rod.

[0087] For further information, please refer to [link / reference]. Figure 5 A baffle 3 is provided through the middle of the mounting frame 2321. The baffle 3 is slidably connected to the mounting frame 2321. The lifting component 2323 is provided through the baffle 3 and is fixedly connected to the baffle 3.

[0088] Specifically, the baffle 3 is made of cold-rolled steel plate with a thickness of 1.5mm, and a 3mm thick silicone rubber sealing layer is pasted on the surface. The sealing layer is tightly fitted to the inner wall of the mounting frame 2321 to improve the sealing effect.

[0089] For further information, please refer to [link / reference]. Figure 5 The length of baffle 3 is more than twice the length of mounting frame 2321;

[0090] Specifically, the baffle 3 and the lifting component 2323 are fixed by welding. The welding point is set in the middle of the baffle 3, and the welding length is 30mm. After welding, the surface is ground to ensure that the connection is flat and to avoid affecting the sliding of the baffle 3.

[0091] For further information, please refer to [link / reference]. Figure 4 The side wall of the clamping plate 213 is provided with an anti-slip pad 4;

[0092] Specifically, the clamping surface is sandblasted with a particle size of 80 mesh to increase the surface roughness of the clamping plate 213 and improve the bonding strength between the anti-slip pad 4 and the clamping plate 213.

[0093] The workflow of this embodiment is as follows:

[0094] Sample preparation and installation: The operator opens the loading and unloading door 11 on the front side of the housing 1 and places both ends of the composite current collector membrane sample between the fixing frame 211 and the clamping plate 213 of the two clamping components 21 respectively; then rotate the knob 214 to push the clamping plate 213 towards the sample through the threaded rod 212 until the anti-slip pad 4 is in close contact with the sample, thus completing the clamping and fixing of the sample; at this time, the lower surface of the sample contacts the two parallel support rollers 221 of the support component 22, and the support rollers 221 provide uniform support for the sample to ensure that the sample membrane surface is flat.

[0095] Test parameter debugging: According to the test requirements, adjust the number of counterweights 2315 in the counterweight structure 231, lift the support plate 2313 with the electric push rod 2317, and put the corresponding number of counterweights 2315 onto the limit rod 2314 of the support plate 2313 through the limit hole 2316, and set the required tension; at the same time, check whether the tension sensor 243 of the detection structure 24 is working properly to ensure that the tension monitoring function is reliable; adjust the position of the lifting component 2323 of the lifting structure 232 so that the sample is in the initial tensile state without additional tension applied.

[0096] Temperature environment setup: Close the loading and unloading door 11 of the housing 1, start the temperature regulation device 25 inside the housing 1, and adjust the internal temperature of the housing 1 to the target test temperature, such as high temperature 60℃, low temperature -20℃, or extreme temperature; at this time, the baffle 3 on the mounting frame 2321 is fixed to the lifting component 2323, and can maintain the seal on the opening of the mounting frame 2321 with the position of the lifting component 2323, preventing the internal temperature of the housing 1 from exchanging with the outside, ensuring that the temperature is stable at the target value and maintained for a period of time, so that the sample can fully adapt to the test temperature environment.

[0097] Tension application and tensile test: The electric push rod 2317 is activated, causing its output end to retract. The support plate 2313 moves downward along the third guide rod 2312 under the gravity of the counterweight 2315. The support plate 2313 drives the clamping assembly 21 connected to it to move downward along the fourth guide rod 2322 simultaneously through the lifting component 2323, applying tension to the sample. The tension is transmitted through the sample to the clamping assembly 21 on the other side, and then to the second mounting component 242 of the detection structure 24. The tension sensor 243 detects the tension in real time and feeds back the data to ensure that the tension is stable at the set value. The support roller 221 rotates synchronously with the stretching of the sample to reduce friction and keep the sample film surface flat, avoiding sample damage.

[0098] Data monitoring and recording: Under the set temperature and tension conditions, the test is conducted continuously for a period of time. During this period, the tension data fed back by the tension sensor 243 and the internal temperature data of the shell 1 displayed by the temperature control device 25 are monitored in real time. At the same time, the tensile state of the sample is observed. After the test is completed, the tensile length of the sample under the specified temperature and tension is recorded. By comparing the length of the marked area on the sample surface before and after the test, and the appearance of the film surface, such as whether there is damage or wrinkles, etc., it serves as the basis for evaluating the temperature resistance performance of the sample.

[0099] Test Completion and Equipment Reset: After the test, activate the electric push rod 2317 to lift the support plate 2313, reducing the tension on the sample; open the pick-up and drop-off door 11, rotate the knob 214 to release the clamping plate 213, and remove the tested sample; clean the inside of the equipment, remove the counterweight 2315, reset the lifting component 2323, support plate 2313, etc., and turn off the temperature control device 25 to complete one test cycle. If tests are required under different temperature or tension conditions, repeat the above steps, adjust the parameters, and test again.

[0100] The temperature regulation device 25 is existing technology. Its main working components include an electric heating wire to raise the temperature, a semiconductor cooling chip to lower the temperature, a temperature sensor to monitor the temperature in real time, and a temperature control mainboard to receive the temperature signal and control the operation of the heating and cooling components. The working principle is to collect the real-time temperature inside the shell 1 through the temperature sensor, transmit the data to the temperature control mainboard, compare it with the preset test temperature, if the temperature is lower than the preset value, the temperature control mainboard controls the electric heating wire to start raising the temperature, and if the temperature is higher than the preset value, it controls the semiconductor cooling chip to start lowering the temperature, so as to achieve accurate setting and stable maintenance of the temperature inside the shell 1 without the need for a new structural design for the temperature regulation function.

[0101] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite current collector temperature resistance testing device, comprising a housing (1), characterized in that, The housing (1) is equipped with a pick-up and put-out door (11) on the front side, and the housing (1) is provided with a tensile testing mechanism (2); The tensile testing mechanism (2) is used to fix both ends of the composite current collector and to stretch the composite current collector; The tensile testing mechanism (2) includes a clamping assembly (21), a support assembly (22), and a tensile assembly (23); The number of clamping components (21) is set to two. One of the clamping components (21) is provided with a detection structure (24) between it and the inner wall of the housing (1). This clamping component (21) is connected to the inner wall of the housing (1) through the detection structure (24). The other clamping component (21) is connected to the tensioning component (23). The two clamping components (21) are used to fix the two ends of the composite current collector. The support component (22) is used to uniformly support the unfolded composite current collector; The stretching assembly (23) is used to drive one of the clamping assemblies (21) to move; The housing (1) is equipped with a temperature regulating device (25).

2. The composite current collector temperature resistance testing device according to claim 1, characterized in that, The clamping assembly (21) includes a fixed frame (211), a threaded rod (212) is threadedly connected to the side wall of the fixed frame (211), a clamping plate (213) is fixedly connected to one end of the threaded rod (212), and a knob (214) is fixedly connected to the other end of the threaded rod (212). The clamping plate (213) has two first guide rods (215) fixedly connected to its side wall. Both first guide rods (215) pass through the fixed frame (211) and are slidably connected to the fixed frame (211).

3. The composite current collector temperature resistance testing device according to claim 2, characterized in that, The detection structure (24) includes a first mounting component (241), the side wall of the first mounting component (241) is fixedly connected to the inner wall of the housing (1), and a second mounting component (242) is provided above the first mounting component (241), the side wall of the second mounting component (242) is fixedly connected to the adjacent fixed frame (211); A tension sensor (243) is provided between the first mounting component (241) and the second mounting component (242). The bottom of the tension sensor (243) is fixedly connected to the first mounting component (241), and the top of the tension sensor (243) is fixedly connected to the second mounting component (242). The tension sensor (243) is provided with a second guide rod (244) on both sides. The bottom of the two second guide rods (244) is fixedly connected to the first mounting member (241). The top of the two second guide rods (244) is provided through the second mounting member (242). The two second guide rods (244) are slidably connected to the second mounting member (242).

4. The composite current collector temperature resistance testing device according to claim 1, characterized in that, The support assembly (22) includes a support roller (221), and the number of the support roller (221) is set to two. The ends of the two support rollers (221) are rotatably connected to the inner wall of the housing (1), and the two support rollers (221) are in the same transverse plane.

5. The composite current collector temperature resistance testing device according to claim 1, characterized in that, The tensioning assembly (23) includes a counterweight structure (231) and a lifting structure (232); The counterweight structure (231) is used to increase the weight of the clamping assembly (21); The lifting structure (232) is used to guide the clamping assembly (21) to move up and down.

6. The composite current collector temperature resistance testing device according to claim 5, characterized in that, The counterweight structure (231) includes a fixed plate (2311), the side wall of the fixed plate (2311) is fixedly connected to the rear side of the shell (1), two third guide rods (2312) are fixedly connected to the top of the fixed plate (2311), a support plate (2313) is provided between the two third guide rods (2312), the two third guide rods (2312) are both through the support plate (2313), the two third guide rods (2312) are both slidably connected to the support plate (2313), two limiting rods (2314) are fixedly connected to the top of the support plate (2313), a plurality of counterweight blocks (2315) are provided between the two limiting rods (2314), and two limiting holes (2316) are opened on the surface of the plurality of counterweight blocks (2315), the two limiting holes (2316) are respectively matched with the two limiting rods (2314); An electric push rod (2317) is provided between the two third guide rods (2312). The bottom of the electric push rod (2317) is fixedly connected to the fixed plate (2311), and the output end of the electric push rod (2317) abuts against the bottom of the support plate (2313).

7. The composite current collector temperature resistance testing device according to claim 6, characterized in that, The lifting structure (232) includes a mounting frame (2321), which is disposed through the rear wall of the housing (1). A fourth guide rod (2322) is provided inside the mounting frame (2321). A lifting component (2323) is slidably disposed on the outer periphery of the middle part of the fourth guide rod (2322). One end of the lifting component (2323) is fixedly connected to the end of the adjacent fixed frame (211), and the other end of the lifting component (2323) is fixedly connected to the support plate (2313).

8. The composite current collector temperature resistance testing device according to claim 7, characterized in that, A baffle (3) is provided through the middle of the mounting frame (2321). The baffle (3) is slidably connected to the mounting frame (2321). The lifting component (2323) is provided through the baffle (3). The lifting component (2323) is fixedly connected to the baffle (3).

9. The composite current collector temperature resistance testing device according to claim 8, characterized in that, The length of the baffle (3) is more than twice the length of the mounting frame (2321).

10. The composite current collector temperature resistance testing device according to claim 2, characterized in that, The clamping plate (213) is provided with an anti-slip pad (4) bonded to its side wall.

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