Cutting tool and testing device for battery material

Abstract

The utility model discloses a cutting tool and a testing device for a battery material, and the cutting tool comprises a bottom plate which is used for placing the battery material; the top plate is fixedly arranged above the bottom plate, a handle assembly is arranged on the top plate and comprises a force application rod and a pressing head, and the force application rod can rotate to drive the pressing head to slide in the height direction; the cutting die is arranged between the pressing head and the bottom plate, and the pressing head can slide in the height direction to drive the cutting die to cut the battery material; wherein the cutting die is movably arranged between the pressing head and the bottom plate and is configured to be capable of cutting the battery material at any cutting angle. According to the utility model, the cutting die is movably arranged between the pressure head and the bottom plate and can be moved or rotated to any cutting angle to cut the battery material, so that samples in different directions are obtained for testing, the mechanical properties of the battery material in multiple directions can be tested, and the test result is more perfect.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cutting fixture and testing device for battery materials. Background Technology

[0002] Lithium-ion batteries are currently widely used in electronic products and new energy vehicles. During charge-discharge cycles and under mechanical stress, the internal materials of lithium-ion batteries undergo structural changes. For example, prolonged expansion and contraction reduce battery capacity and shorten its lifespan. Mechanical stress can damage internal materials or cause internal short circuits, leading to the risk of thermal runaway. Therefore, the mechanical properties of the battery's internal materials play a crucial role in its lifespan and safety. Based on this, it is necessary to test battery materials to obtain their mechanical properties and make improvements.

[0003] Battery material testing typically includes punching and tensile testing. Before punching and tensile testing, battery material samples of a predetermined size and shape need to be cut out, and then the samples are placed in a fixture for tensile or punching.

[0004] However, existing battery material tests can only cut samples in one direction, which means that the tests can only detect the mechanical properties of the battery material in one direction, resulting in incomplete test results. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a cutting tool and testing device for battery materials, so as to solve the problem that the prior art can only measure the mechanical properties of battery materials in a single direction.

[0006] The technical solution adopted by this utility model to solve its technical problem is a cutting tool for battery materials, including:

[0007] The base plate is used to hold the battery materials;

[0008] A top plate is fixedly installed above the bottom plate. A handle assembly is provided on the top plate. The handle assembly includes a force-applying rod and a pressure head. The force-applying rod can rotate to drive the pressure head to slide along the height direction.

[0009] A die is disposed between the pressure head and the base plate. The pressure head can slide along the height direction to drive the die to cut the battery material.

[0010] The angle between the length direction of the die and the length direction of the battery material is defined as the cutting angle. The die is movably disposed between the pressure head and the base plate and is configured to cut the battery material at any cutting angle.

[0011] Furthermore, a movable plate that can slide along the height direction is provided between the die and the pressure head. One side of the movable plate can abut or separate from the pressure head, and the other side of the movable plate can abut or separate from the die.

[0012] Furthermore, a number of guide posts are provided, the top plate and the bottom plate are both fixed to the guide posts, and the movable plate is slidably disposed on the guide posts.

[0013] Furthermore, a number of return springs are provided between the movable plate and the base plate.

[0014] Furthermore, the handle assembly also includes:

[0015] A fixed rod is fixed to the top plate. The fixed rod is provided with a first hinge part and a second hinge part. One end of the force-applying rod is hinged to the first hinge part. The force-applying rod is provided with a third hinge part.

[0016] A first movable rod and a second movable rod, one end of the first movable rod is hinged to the second movable rod, the other end of the first movable rod is hinged to the third hinge portion, and the end of the second movable rod away from the first movable rod is hinged to the second hinge portion; a fourth hinge portion is provided on the second movable rod;

[0017] The third movable rod has one end hinged to the fourth hinge part and the other end hinged to the pressure head.

[0018] Furthermore, the pressure head includes a pressure block and a connecting rod disposed on the pressure block. The pressure block is located on the side of the top plate away from the force-applying rod, and the connecting rod is slidably disposed on the top plate and hinged to the third movable rod.

[0019] Furthermore, a testing apparatus for battery materials is also disclosed, including the aforementioned cutting fixture for battery materials, the cutting fixture being used to cut battery materials and obtain battery material samples;

[0020] The cutting angle is 0°, 45° and 90°.

[0021] Furthermore, it also includes:

[0022] A fixed clamp and a movable clamp, wherein the fixed clamp and the movable clamp are respectively capable of clamping opposite ends of the battery material sample, and the movable clamp is capable of moving toward or away from the fixed clamp;

[0023] A press, which is used to move the movable fixture.

[0024] Furthermore, it also includes:

[0025] A mounting fixture and a perforating head are provided, wherein the mounting fixture is used to mount the battery material sample, and the perforating head is movable in a direction toward or away from the mounting fixture;

[0026] A press, which is used to move the piercing head.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] The die is movable between the pressure head and the base plate. It can be moved or rotated to any cutting angle to cut the battery material, thereby obtaining samples in different directions for testing. This allows for the measurement of the mechanical properties of the battery material in multiple directions, resulting in more comprehensive test results. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the cutting fixture in Example 1;

[0030] Figure 2 This is an exploded view of the cutting fixture in Example 1;

[0031] Figure 3 This is a side view of the cutting fixture in Example 1;

[0032] Figure 4 This is a schematic diagram of the handle assembly in Embodiment 1;

[0033] Figure 5 This is a schematic diagram of the test apparatus used for tensile testing in Example 2;

[0034] Figure 6 This is a schematic diagram of the test apparatus used for the piercing test in Example 2;

[0035] In the picture:

[0036] 10. Press; 20. Movable clamp; 30. Fixed clamp; 40. Piercing head; 50. Mounting clamp;

[0037] 100. Base plate;

[0038] 200. Movable board;

[0039] 300. Top plate;

[0040] 400. Guide post; 410. Return spring;

[0041] 500. Handle assembly; 510. Pressure head; 511. Pressure block; 512. Connecting rod; 520. Fixing rod; 530. Force application rod; 540. First movable rod; 550. Second movable rod; 560. Third movable rod;

[0042] 600. Die-cutting mold;

[0043] 700. Battery materials. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0045] Example 1

[0046] Please refer to Figures 1-4 This embodiment discloses a cutting fixture for battery materials, comprising:

[0047] Base plate 100, used to hold battery material 700;

[0048] A top plate 300 is fixedly disposed above the bottom plate 100. A handle assembly 500 is disposed on the top plate 300. The handle assembly 500 includes a force-applying rod 530 and a pressure head 510. The force-applying rod 530 is rotatable to drive the pressure head 510 to slide along the height direction.

[0049] A die 600 is disposed between the pressure head 510 and the base plate 100. The pressure head 510 can slide along the height direction to drive the die 600 to cut the battery material 700.

[0050] The angle between the length direction of the die 600 and the length direction of the battery material 700 is defined as the cutting angle. The die 600 is movably disposed between the pressure head 510 and the base plate 100 and is configured to cut the battery material 700 at any cutting angle.

[0051] Specifically, the cutting fixture in this application includes a base plate 100 and a top plate 300. The battery material 700 is placed on the base plate 100, and then the force rod 530 is rotated to drive the pressure head 510 to press down the die 600, finally causing the die 600 to cut out a sample of the battery material 700. Most importantly, the die 600 is movably positioned between the pressure head 510 and the base plate 100, allowing it to be moved or rotated to any cutting angle to cut the battery material 700, thereby obtaining samples in different directions for testing. This enables the measurement of the mechanical properties of the battery material 700 in multiple directions, resulting in more comprehensive test results.

[0052] Furthermore, a movable plate 200 that can slide along the height direction is provided between the die 600 and the pressure head 510. One side of the movable plate 200 can abut or separate from the pressure head 510, and the other side of the movable plate 200 can abut or separate from the die 600.

[0053] It should be noted that if the die 600 and the pressure head 510 are in direct contact, the contact area between the two is large, which can easily cause uneven force on various parts of the die 600 and cause it to tilt, making it impossible to cut the battery material 700 evenly.

[0054] Based on this, in this embodiment, a movable plate 200 is provided between the die 600 and the pressure head 510. The pressure head 510 abuts against the upper surface of the movable plate 200 and applies downward pressure. The lower surface of the movable plate 200 contacts the die 600, which increases the contact area between the movable plate 200 and the die 600, making the force on the die 600 more uniform.

[0055] Furthermore, the die 600 is an independent component, and it has no direct connection with other components. During cutting, the die 600 can be manually placed above the battery material 700 and its angle adjusted to cut out a sample of the battery material 700 in the predetermined direction.

[0056] Of course, the die 600 can also be rotatably set on the movable plate 200, and its cutting angle can be adjusted by rotating the die 600 to achieve sampling in different directions.

[0057] The upper end of the die is a plate that can abut or separate from the movable plate 200, and the lower end of the die has a blade. The shape of the blade depends on the shape of the battery material sample to be cut, such as a rectangle or a square.

[0058] Furthermore, a plurality of guide posts 400 are provided, the top plate 300 and the bottom plate 100 are both fixedly connected to the guide posts 400, and the movable plate 200 is slidably disposed on the guide posts 400.

[0059] Multiple guide posts 400 are provided so that the movable plate 200 can be slidably fitted onto the guide posts 400. This can constrain the sliding direction of the movable plate 200 so that the movable plate 200 slides only along the height direction, thus avoiding uneven force on the die 600 caused by the movable plate 200 tilting during cutting.

[0060] Furthermore, a plurality of return springs 410 are provided between the movable plate 200 and the base plate 100.

[0061] A reset spring 410 is provided so that the movable plate 200 automatically resets after the cutting is completed, making way for the space above the battery material 700 so that the battery material 700 sample can be taken out.

[0062] Furthermore, the handle assembly 500 also includes:

[0063] A fixing rod 520 is fixed to the top plate 300. The fixing rod 520 is provided with a first hinge part and a second hinge part. One end of the force-applying rod 530 is hinged to the first hinge part. The force-applying rod 530 is provided with a third hinge part.

[0064] A first movable rod 540 and a second movable rod 550 are provided. One end of the first movable rod 540 is hinged to the second movable rod 550, and the other end of the first movable rod 540 is hinged to the third hinge portion. The end of the second movable rod 550 away from the first movable rod 540 is hinged to the second hinge portion. A fourth hinge portion is provided on the second movable rod 550.

[0065] The third movable rod 560 has one end hinged to the fourth hinge part and the other end hinged to the pressure head 510.

[0066] The pressure head 510 includes a pressure block 511 and a connecting rod 512 disposed on the pressure block 511. The pressure block 511 is located on the side of the top plate 300 away from the force-applying rod 530. The connecting rod 512 is slidably inserted through the top plate 300 and hinged to the third movable rod 560.

[0067] Specifically, when the force-applying rod 530 is rotated downwards, it will cause the first movable rod 540, the second movable rod 550 and the third movable rod 560 to rotate simultaneously. The end of the third movable rod 560 will cause the connecting rod 512 to move downwards, so that the pressure block 511 abuts against the movable plate 200. The movable plate 200 will apply downward pressure to the die 600 to cut the battery material 700.

[0068] By setting up a force-applying rod 530, a first movable rod 540, a second movable rod 550, and a third movable rod 560, the entire handle assembly 500 forms a force-saving lever. Only a small force needs to be applied at the force-applying rod 530 to make the die 600 cut the battery material 700.

[0069] Example 2

[0070] Please refer to Figures 5-6 This embodiment discloses a testing device for battery material 700, including the aforementioned cutting fixture for battery material, which is used to cut battery material and obtain battery material samples; wherein the cutting angle is 0°, 45° and 90°.

[0071] Specifically, when the cutting angle is 0°, it is a transverse sampling, and the transverse mechanical properties of the battery material 700 can be measured; when the cutting angle is 90°, it is a longitudinal sampling, and the longitudinal mechanical properties of the battery material 700 can be measured; when the cutting angle is 45°, it is an oblique sampling, and the mechanical properties of the battery material 700 in the 45° direction can be measured.

[0072] It should be noted that the cutting fixture is used to cut battery materials and cut battery material samples at a predetermined cutting angle. The battery material samples are then installed in the testing device for punching or tensile testing to measure the mechanical properties of the battery materials.

[0073] Furthermore, it also includes:

[0074] The fixed clamp 30 and the movable clamp 20 can respectively clamp the opposite ends of the battery material sample, and the movable clamp 20 can move in a direction toward or away from the fixed clamp 30.

[0075] Furthermore, it also includes:

[0076] The mounting fixture 50 is used to mount the battery material sample, and the perforating head 40 is movable in a direction toward or away from the mounting fixture 50.

[0077] Furthermore, it also includes a press 10, which is used to move the movable clamp 20 or the perforating head 40.

[0078] Specifically, the fixed clamp 30 and the movable clamp 20 respectively clamp the two ends of the battery material sample. The press 10 drives the movable clamp 20 to move away from the fixed clamp 30 to stretch the battery material sample, thereby measuring the elastic modulus, yield strength, tensile strength, elongation and other mechanical properties of the battery material 700 in all directions.

[0079] The mounting fixture 50 is used to hold the battery material sample. The press 10 drives the perforating head 40 to move in the direction of the mounting fixture 50 to perforate the battery material sample, thereby measuring the mechanical properties of the battery material 700, such as the breaking strength and breaking strain in all directions.

[0080] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0081] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0083] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A cutting fixture for battery materials, characterized in that, include: The base plate is used to hold the battery materials; A top plate is fixedly installed above the bottom plate. A handle assembly is provided on the top plate. The handle assembly includes a force-applying rod and a pressure head. The force-applying rod can rotate to drive the pressure head to slide along the height direction. A die is disposed between the pressure head and the base plate. The pressure head can slide along the height direction to drive the die to cut the battery material. The angle between the length direction of the die and the length direction of the battery material is defined as the cutting angle. The die is movably disposed between the pressure head and the base plate and is configured to cut the battery material at any cutting angle.

2. The cutting fixture for battery materials according to claim 1, characterized in that, A movable plate that can slide along the height direction is also provided between the die and the pressure head. One side of the movable plate can abut or separate from the pressure head, and the other side of the movable plate can abut or separate from the die.

3. The cutting fixture for battery materials according to claim 2, characterized in that, It is also provided with several guide posts, the top plate and the bottom plate are fixed to the guide posts, and the movable plate is slidably disposed on the guide posts.

4. A cutting fixture for battery materials according to claim 2, characterized in that, Several return springs are also provided between the movable plate and the base plate.

5. A cutting fixture for battery materials according to claim 1, characterized in that, The handle assembly also includes: A fixed rod is fixed to the top plate. The fixed rod is provided with a first hinge part and a second hinge part. One end of the force-applying rod is hinged to the first hinge part. The force-applying rod is provided with a third hinge part. A first movable rod and a second movable rod, one end of the first movable rod is hinged to the second movable rod, the other end of the first movable rod is hinged to the third hinge portion, and the end of the second movable rod away from the first movable rod is hinged to the second hinge portion; a fourth hinge portion is provided on the second movable rod; The third movable rod has one end hinged to the fourth hinge part and the other end hinged to the pressure head.

6. A cutting fixture for battery materials according to claim 5, characterized in that, The pressure head includes a pressure block and a connecting rod disposed on the pressure block. The pressure block is located on the side of the top plate away from the force-applying rod. The connecting rod is slidably disposed on the top plate and hinged to the third movable rod.

7. A testing apparatus for battery materials, characterized in that, Includes a cutting fixture for battery materials as described in any one of claims 1-6, the cutting fixture being used to cut battery materials and obtain battery material samples; The cutting angle is 0°, 45° and 90°.

8. The testing apparatus for battery materials according to claim 7, characterized in that, Also includes: A fixed clamp and a movable clamp, wherein the fixed clamp and the movable clamp are respectively capable of clamping opposite ends of the battery material sample, and the movable clamp is capable of moving toward or away from the fixed clamp; A press, which is used to move the movable fixture.

9. A testing apparatus for battery materials according to claim 7, characterized in that, Also includes: A mounting fixture and a perforating head are provided, wherein the mounting fixture is used to mount the battery material sample, and the perforating head is movable in a direction toward or away from the mounting fixture; A press, which is used to move the piercing head.

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