Battery diaphragm tensile strength detection device

Abstract

The utility model relates to the field of battery diaphragms, and discloses a battery diaphragm tensile strength detection device, which comprises a mounting frame, one surface of the mounting frame is provided with an insertion hole in a penetrating manner, the mounting frame is provided with a fixing clamp structure corresponding to the insertion hole, and the fixing clamp structure comprises two groups of suction cup clamping assemblies and support assemblies which are symmetrical about the insertion hole. Two groups of symmetrical sucker clamping assemblies are arranged between the bracket assemblies, a tensile fixture structure is arranged between the mounting frames, and the fixture for fixing the battery diaphragm clamps the battery diaphragm in a manner of mainly adopting suckers, so that the damage conditions of clamping marks, scratches and the like on the battery diaphragm caused by local pressure concentration of a traditional mechanical fixture are effectively avoided; the fixture for mounting the sensor of the tensile strength detector adopts the rotary drum, the stretched end of the battery diaphragm penetrates through the insertion hole in the rotary drum, the battery diaphragm is fixed on the rotary drum through rotation, the rotary drum can clamp the battery diaphragm, the clamping part is uniformly stressed, and the obtained data is accurate.

Description

Technical Field

[0001] This utility model relates to the field of battery separators, specifically a battery separator tensile strength testing device. Background Technology

[0002] The battery separator is a membrane material located between the positive and negative electrodes of a battery. It is a key component of the battery and has a direct impact on its performance, safety, and cost. Preventing direct contact between the positive and negative electrodes to avoid short circuits is the most basic function of the battery separator. During battery charging and discharging, there is a significant potential difference between the positive and negative electrodes. Without the separator's isolation, electrons would flow directly from the negative electrode to the positive electrode, creating a short-circuit current, leading to serious safety issues such as battery overheating or even explosion. Tensile strength is an important indicator of the mechanical performance of the battery separator. Testing the tensile strength of the battery separator ensures that it will not easily break during battery manufacturing and use, thus preventing direct contact between the positive and negative electrodes and short circuits.

[0003] Existing battery separator tensile strength testing devices typically use flat-jaw clamps with textured surfaces to increase friction. Despite the textured surfaces, slippage can still occur with some relatively smooth battery separator materials, especially during high-strength tensile tests. When clamping the sample, the pressure is concentrated at the contact edge between the clamp and the sample, which may cause localized damage to the battery separator sample. This localized damage may become a weak point in the sample during the tensile process, leading to premature breakage and a lower-than-expected tensile strength. Therefore, we propose a battery separator tensile strength testing device. Utility Model Content

[0004] Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a battery separator tensile strength testing device, which solves the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a battery separator tensile strength testing device, comprising a mounting frame, wherein one side of the mounting frame has a through-hole, the side of the mounting frame with the through-hole is the top surface of the mounting frame, the mounting frame is provided with a fixing clamp structure corresponding to the through-hole, the fixing clamp structure includes two sets of suction cup clamping assemblies and bracket assemblies symmetrical about the through-hole, two sets of symmetrical suction cup clamping assemblies are provided between the bracket assemblies, and a tensile clamp structure is provided between the mounting frames.

[0008] Preferably, the bracket assembly includes threaded rods and adjusting rods. Four adjusting rods are arranged in a matrix and evenly distributed and fixedly connected to the outer surface of the mounting frame with the insertion holes. The four adjusting rods correspond to the insertion holes, and the insertion holes are located between the four adjusting rods. The two opposite sides of the two adjusting rods corresponding to the short side of the insertion hole are fixedly connected to the two end planes of the threaded rod. Each threaded rod is threaded with four nuts.

[0009] Preferably, the mounting frame has two trapezoidal grooves symmetrical about the insertion hole on one side of the adjusting upright, and the orientation of the trapezoidal grooves is consistent with the orientation of the central axis of the threaded rod.

[0010] Preferably, the suction cup clamping assembly includes a T-shaped suction cup base, adjusting protrusions, suction cups, springs, and trapezoidal protrusions. One end of the T-shaped suction cup base is fixedly connected to a trapezoidal protrusion, which corresponds to and engages with a trapezoidal groove. One end of a spring is fixedly connected to the side of the trapezoidal protrusion facing away from the insertion hole, and the other end of the spring is fixedly connected to the side of the trapezoidal groove away from the insertion hole. The spring is located within the trapezoidal groove. Two adjusting protrusions are fixedly connected to the symmetrical ends of the T-shaped suction cup base. Each adjusting protrusion has an adjusting hole through its corresponding side. The adjusting holes are coaxially connected to two threaded rods, with the threaded rods positioned between the adjusting holes. The adjusting protrusions are positioned between two nuts on the threaded rods. Four evenly distributed suction cups are fixedly connected through the T-shaped suction cup base on its corresponding side.

[0011] Preferably, the suction cup clamping assembly further includes a vent cap and a vent tube. One end of the vent tube is fixedly connected to the center position of the side of the T-shaped suction cup base away from the insertion hole. The external thread surface of the vent tube is coaxially threaded to the internal thread surface of the vent cap. A set of circumferentially evenly distributed vent holes are opened through the outer cylindrical surface of the vent tube.

[0012] Preferably, the tension clamp structure includes a support plate, a motor, a rotating drum, and a torque sensor. A mounting hole is provided through the right side of the mounting frame, and a bearing is provided between the mounting holes, with the outer ring of the bearing fixedly connected. The support plate is fixedly connected to the outer side of the mounting frame corresponding to the mounting hole. One end of the rotating drum passes through the mounting hole and is fixedly connected to the inner wall of the mounting frame corresponding to the mounting hole via a bearing seat. An insertion hole is provided through the cylindrical surface of the rotating drum, corresponding to the insertion hole on the mounting frame. A torque sensor is fixedly installed on the outer surface of the rotating drum near one end. The end of the rotating drum corresponding to the mounting hole outside the mounting frame is fixedly connected to the motor's main shaft via a coupling. The motor base is fixedly connected to the support plate.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a battery separator tensile strength testing device, which has the following beneficial effects:

[0015] 1. The battery separator tensile strength testing device uses a clamp with suction cups to hold the battery separator in place. It is suitable for different shapes. Since the adsorption force is evenly distributed in the contact area between the separator and the suction cup, it effectively avoids damage such as clamp marks and scratches caused by local pressure concentration in traditional mechanical clamps, thus maximizing the integrity and original performance of the battery separator.

[0016] 2. The battery separator tensile strength testing device uses a rotating drum as the clamp for mounting the tensile strength tester sensor. One end of the battery separator is stretched and passed through the insertion hole on the rotating drum. The rotating drum fixes the battery separator to the rotating drum, while the other end of the battery separator is clamped and fixed. The rotating drum is rotated until the battery separator deforms and breaks. The data read by the torque sensor on the rotating drum is used to calculate the tensile strength by computer. The rotating drum can clamp the battery separator tightly and the force at the clamping point is uniform, so the data obtained is accurate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the fixing fixture structure of this utility model;

[0020] Figure 4 for Figure 3 A magnified view of part A in the diagram.

[0021] In the diagram: 1. Mounting frame; 2. Support plate; 3. Motor; 4. Rotary drum; 5. T-shaped suction cup base; 6. Vent cap; 7. Adjusting protrusion; 8. Threaded rod; 9. Adjusting upright; 10. Trapezoidal groove; 11. Spring; 12. Insertion hole; 13. Torque sensor; 14. Suction cup; 15. Adjustment hole; 16. Trapezoidal protrusion; 17. Vent hole; 18. Vent pipe; 19. Mounting hole. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4A battery separator tensile strength testing device includes a mounting frame 1, with an insertion hole 12 extending through one side of the mounting frame 1. The side of the mounting frame 1 with the insertion hole 12 is designated as the top surface of the mounting frame 1. The mounting frame 1 is provided with a fixing clamp structure corresponding to the insertion hole 12. The fixing clamp structure includes two sets of suction cup clamping assemblies and bracket assemblies symmetrical about the insertion hole 12. Two sets of symmetrical suction cup clamping assemblies are provided between the bracket assemblies. A tensile clamp structure is provided between the mounting frames 1.

[0024] Furthermore, the bracket assembly includes threaded rods 8 and adjusting rods 9. Four adjusting rods 9 are arranged in a matrix and evenly distributed and fixedly connected to the outer surface of the mounting frame 1 with insertion holes 12. The four adjusting rods 9 correspond to the insertion holes 12, and the insertion holes 12 are located between the four adjusting rods 9. The two opposite sides of the two adjusting rods 9 corresponding to the short side of the insertion hole 12 are fixedly connected to the two end planes of the threaded rod 8. Each threaded rod 8 is threaded with four nuts. The adjusting rods 9 are used to support and connect the threaded rods 8. The threaded rods 8 and nuts are used to adjust the spacing between the two sets of suction cup clamping assemblies. By rotating the nuts, the suction cup clamping assemblies slide on the threaded rods 8, and are locked after adjustment.

[0025] Furthermore, the mounting frame 1 has two trapezoidal grooves 10 symmetrical about the insertion hole 12 on one side of the adjusting rod 9. The orientation of the trapezoidal grooves 10 is consistent with the orientation of the central axis of the threaded rod 8. The trapezoidal grooves 10 are sliding grooves for the movement of the suction cup clamping assembly, and limit the suction cup clamping assembly to make the sliding smooth.

[0026] Furthermore, the suction cup clamping assembly includes a T-shaped suction cup base 5, adjusting protrusions 7, a suction cup 14, a spring 11, and trapezoidal protrusions 16. One end of the T-shaped suction cup base 5 is fixedly connected to the trapezoidal protrusion 16, which corresponds to and engages with the trapezoidal groove 10. One end of the spring 11 is fixedly connected to the side of the trapezoidal protrusion 16 facing away from the insertion hole 12, and the other end of the spring 11 is fixedly connected to the side of the trapezoidal groove 10 away from the insertion hole 12. The spring 11 is located within the trapezoidal groove 10. Two adjusting protrusions 7 are symmetrically connected to the two ends of the T-shaped suction cup base 5. Each adjusting protrusion 7 has an adjusting hole 15 extending through it on the side corresponding to the insertion hole 12. The adjusting holes 15 are coaxially connected to two threaded rods 8, with the threaded rods 8 positioned between the adjusting holes 15. Between the two nuts on the threaded rod 8, the protrusion 7 is located between the two nuts. The T-shaped suction cup base 5, corresponding to the insertion hole 12, is fixedly connected to four evenly distributed suction cups 14. The T-shaped suction cup base 5 is used to install and connect the suction cups 14 and serves as the ventilation channel for the suction cups 14. The suction cups 14 are used to adhere and clamp the battery separator. The trapezoidal protrusion 16 is used to engage with the trapezoidal groove 10 and slides between the trapezoidal groove 10. The spring 11 is always in a compressed state and provides part of the clamping force of the T-shaped suction cup base 5. The adjusting protrusion 7 and the adjusting hole 15 are used to drive the T-shaped suction cup base 5 to the threaded rod 8. The adjusting protrusion 7 is sandwiched between the two nuts to adjust the position of the two nuts, clamping and limiting the distance between the two T-shaped suction cup bases 5, thereby clamping the battery separator.

[0027] Furthermore, the suction cup clamping assembly also includes a vent cap 6 and a vent tube 18. One end of the vent tube 18 is fixedly connected to the center of the side of the T-shaped suction cup base 5 away from the insertion hole 12. The external thread surface of the vent tube 18 is coaxially threaded to the internal thread surface of the vent cap 6. A set of evenly distributed vent holes 17 are opened through the outer cylindrical surface of the vent tube 18. The vent tube 18 is used to connect the air inside the T-shaped suction cup base 5 with the outside air. The vent cap 6 is used to control the connection or disconnection between the vent tube 18 and the outside air. The vent holes 17 prevent the vent cap 6 from being completely detached from the vent tube 18 when the vent is turned on, thus avoiding it from falling off and being lost.

[0028] Furthermore, the tension clamp structure includes a support plate 2, a motor 3, a rotating drum 4, and a torque sensor 13. A mounting hole 19 is provided through the right side of the mounting frame 1. A bearing is provided between the mounting holes 19 and its outer ring is fixedly connected. One side of the support plate 2 is fixedly connected to the outer side of the mounting frame 1 corresponding to the mounting hole 19. One end of the rotating drum 4 passes through the mounting hole 19 and is fixedly connected to the inner wall of the mounting frame 1 corresponding to the mounting hole 19 via a bearing seat. An insertion hole 12 is provided through the cylindrical surface of the rotating drum 4. The insertion hole 12 on the rotating drum 4 is connected to the mounting frame 1... Corresponding to the insertion hole 12, a torque sensor 13 is fixedly installed on one end of the outer surface of the rotating drum 4. The rotating drum 4 is fixedly connected to the main shaft of the motor 3 through a coupling at one end outside the mounting frame 1, corresponding to the mounting hole 19. The base of the motor 3 is fixedly connected to the support plate 2. The support plate 2 is used to install the motor 3. The motor 3 is used to provide the tensile force for detecting the tensile strength of the battery separator. The rotating drum 4 is used to wind and fix the battery separator. The insertion hole 12 is used for the battery separator to pass through. The torque sensor 13 is used to collect torque data. The tensile strength is calculated by calculating the tensile force from the torque.

[0029] Working principle: When testing the tensile strength of the battery separator, adjust the nuts on the two threaded rods 8 to separate the opposing adjusting protrusions 7, thereby separating the two T-shaped suction cup bases 5. Pass one end of the battery separator to be tested between the two symmetrical sets of suction cups 14, and continue through the insertion hole 12 on the mounting frame 1 to the mounting frame 1. Continue passing the end of the battery separator between the mounting frames 1 through the insertion hole 12 on the rotating cylinder 4. Rotate the battery separator to adhere it to the cylindrical surface of the rotating cylinder 4. Start the motor 3 to rotate and stack the battery separator to fix it to the cylindrical surface of the rotating cylinder 4. Turn off the motor 3, and adjust the nuts on the threaded rods 8 to separate the two T-shaped suction cup bases 5. The suction cup 14 is compressed and adhered to both sides of the battery separator. When the suction cup 14 is compressed to its maximum extent, the vent cap 6 is rotated and moved towards the vent tube 18 until the vent hole 17 is completely adhered to the threaded surface of the vent tube 18, disconnecting the air communication between the outside and the air inside the vent tube 18. Then, the motor 3 is started again to make the rotating drum 4 rotate and stretch the battery separator until the battery separator breaks. The data detected by the torque sensor 13 is transmitted to the computer to calculate the tensile strength of the battery separator. After the test is completed, the broken battery separator on the rotating drum 4 is removed. Then, the nut on the threaded rod 8 is adjusted to separate the suction cup 14. The vent cap 6 is then unscrewed, and the suction cup 14 is connected to the outside air. The remaining battery separator is then removed.

[0030] 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 battery separator tensile strength testing device, comprising a mounting frame (1), characterized in that: The mounting frame (1) has a through hole (12) on one side. The side of the mounting frame (1) with the hole (12) is the top surface of the mounting frame (1). The mounting frame (1) is provided with a fixing clamp structure corresponding to the hole (12). The fixing clamp structure includes two sets of suction cup clamping components and bracket components that are symmetrical about the hole (12). Two sets of symmetrical suction cup clamping components are provided between the bracket components. A tension clamp structure is provided between the mounting frames (1).

2. The battery separator tensile strength testing device according to claim 1, characterized in that: The bracket assembly includes a threaded rod (8) and an adjusting rod (9). The four adjusting rods (9) are arranged in a matrix and evenly distributed and fixedly connected to the outer surface of the mounting frame (1) with the insertion hole (12). The four adjusting rods (9) correspond to the insertion hole (12) and the insertion hole (12) is between the four adjusting rods (9). The two opposite sides of the two adjusting rods (9) corresponding to the short side of the insertion hole (12) are fixedly connected to the two end planes of the threaded rod (8). Each threaded rod (8) is threaded with four nuts.

3. The battery separator tensile strength testing device according to claim 2, characterized in that: The mounting frame (1) has two trapezoidal grooves (10) symmetrical about the insertion hole (12) on one side of the adjusting rod (9). The orientation of the trapezoidal grooves (10) is consistent with the orientation of the central axis of the threaded rod (8).

4. The battery separator tensile strength testing device according to claim 3, characterized in that: The suction cup clamping assembly includes a T-shaped suction cup base (5), an adjusting protrusion (7), a suction cup (14), a spring (11), and a trapezoidal protrusion (16). One end of the T-shaped suction cup base (5) is fixedly connected to the trapezoidal protrusion (16). The trapezoidal protrusion (16) corresponds to the trapezoidal groove (10) and engages with it. One end of the spring (11) is fixedly connected to the side of the trapezoidal protrusion (16) facing away from the insertion hole (12). The other end of the spring (11) is fixedly connected to the trapezoidal groove (10) away from the insertion hole (12). On one side, the spring (11) is in the trapezoidal groove (10), and two adjusting protrusions (7) are fixedly connected to the two ends of the T-shaped suction cup base (5) symmetrically. The two adjusting protrusions (7) are provided with adjusting holes (15) through the side of the insertion hole (12). The adjusting holes (15) are coaxially connected to the two threaded rods (8) respectively, and the threaded rods (8) are between the adjusting holes (15). The adjusting protrusions (7) are between the two nuts on the threaded rods (8). Four evenly distributed suction cups (14) are fixedly connected through the side of the T-shaped suction cup base (5) corresponding to the insertion hole (12).

5. The battery separator tensile strength testing device according to claim 4, characterized in that: The suction cup clamping assembly also includes a vent cap (6) and a vent pipe (18). One end of the vent pipe (18) is fixedly connected to the center of the side of the T-shaped suction cup base (5) away from the insertion hole (12). The external thread surface of the vent pipe (18) is coaxially threaded to the internal thread surface of the vent cap (6). A set of circumferentially evenly distributed vent holes (17) are opened through the outer cylindrical surface of the vent pipe (18).

6. The battery separator tensile strength testing device according to claim 1, characterized in that: The tension clamp structure includes a support plate (2), a motor (3), a rotating drum (4), and a torque sensor (13). The right side of the mounting frame (1) has a through mounting hole (19). A bearing is provided between the mounting holes (19) and the outer ring of the bearing is fixedly connected. The outer side of the mounting frame (1) corresponding to the mounting hole (19) is fixedly connected to one side of the support plate (2). One end of the rotating drum (4) passes through the mounting hole (19) and is fixedly connected to the inner wall of the mounting frame (1) corresponding to the mounting hole (19) through the bearing seat. A through insertion hole (12) is provided on the cylindrical surface of the rotating drum (4). The insertion hole (12) on the rotating drum (4) corresponds to the insertion hole (12) on the mounting frame (1). A torque sensor (13) is fixedly installed on one end of the outer surface of the rotating drum (4). The end of the rotating drum (4) corresponding to the mounting hole (19) outside the mounting frame (1) is fixedly connected to the main shaft of the motor (3) through a coupling. The base of the motor (3) is fixedly connected to the support plate (2).

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