Extrusion testing device

Abstract

The utility model discloses an extrusion testing device which comprises a testing platform, at least two clamping assemblies and a connecting assembly, clamp assemblies are arranged on the testing platform and oppositely arranged to form a working cavity, the at least two clamping assemblies are used for clamping a battery cell through the working cavity, and each clamping assembly comprises a clamping plate and a supporting piece. The clamping plates are placed on the testing platform and oppositely arranged to form a working cavity, and the supporting pieces are connected to the sides, away from the working cavity, of the clamping plates and extend in the thickness direction perpendicular to the clamping plates. The connecting assembly is connected with the oppositely-arranged clamping plates. According to the extrusion test device, the technical problem that the battery cell is easy to deflect in the extrusion test process of the battery cell is solved.

Description

Technical Field

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

[0002] Battery compression is a significant safety issue. When batteries are subjected to external pressure, it can lead to serious consequences such as internal short circuits, thermal runaway, and even fires or explosions. Therefore, understanding the safety limits of battery compression is crucial for battery design and use.

[0003] The main purpose of battery compression testing is to evaluate the structural strength and safety of the battery under compression, especially at the system module level, where the compression boundary of the cell needs to be tested to determine the maximum deformation the battery can withstand. By testing the cell's compression boundary capability, appropriate preventative measures can be taken to ensure the safety and reliability of the battery design.

[0004] However, during the testing process, data such as battery displacement, deformation, and maximum compressive force may deviate, thus affecting the battery's safety assessment. Utility Model Content

[0005] One objective of this invention is to provide a compression testing device, which aims to solve the technical problem that battery cells are prone to deflection during the compression testing process.

[0006] To achieve the above objectives, the present invention provides a solution: a compression testing device, characterized in that it includes: a testing platform;

[0007] At least two clamping assemblies are disposed on a test platform and arranged opposite each other to form a working cavity. The at least two clamping assemblies are used to clamp the battery cell through the working cavity. The clamping assemblies include a clamping plate and a support member. The clamping plate is placed on the test platform and arranged opposite each other to form a working cavity. The support member is connected to the side of the clamping plate away from the working cavity and extends along the thickness direction perpendicular to the clamping plate.

[0008] Connecting components, connecting clamps that are set relatively apart.

[0009] Optionally, the width of the support gradually increases in the direction toward the test platform.

[0010] Optionally, the connecting assembly includes a first connecting part and a first locking part. The first connecting part passes through the clamps on both sides of the working cavity in sequence and abuts against one side of the clamp. The first locking part is connected to the first connecting part and abuts against the clamp on the other side.

[0011] Optionally, the first connecting part includes a nut and a screw rod, the screw rod passes through the clamping plate and is threadedly engaged with the clamping plate, the nut is connected to one end of the screw rod and abuts against one side of the clamping plate, and the first locking part is connected to the end of the screw rod away from the nut.

[0012] Optionally, the extrusion testing device includes a second connecting part disposed in the working chamber, the second connecting part being used to connect the screw and the clamping plate.

[0013] Optionally, there are multiple second connecting parts, which are connected end to end sequentially along the length of the screw.

[0014] Optionally, the second connecting part includes a connecting cylinder and a connecting rod, the connecting cylinder and the screw are connected, the connecting rod and the connecting cylinder are connected, and the connecting rod and the clamp are connected.

[0015] Optionally, there may be multiple connecting components, which are spaced apart along the length of the clamp.

[0016] Optionally, a working cavity is formed between adjacent connecting components, and the working cavity is used to place the battery cell.

[0017] Optionally, the connecting components are symmetrically arranged on both sides of the support member relative to the support member.

[0018] Optionally, the extrusion testing device includes multiple auxiliary parts, which are arranged on the testing platform and connected to opposite sides of the support.

[0019] Optionally, the connecting component includes a second locking part, and both the support member and the test platform are provided with locking holes. The second locking part passes through the locking holes to lock the support member and the test platform.

[0020] Optionally, the test platform is provided with a slide groove that extends in a direction perpendicular to the thickness of the clamping plate, and the support and the slide groove are slidably engaged; and / or, the clamping plate and the slide groove are slidably engaged.

[0021] The beneficial effects of this utility model are as follows:

[0022] The extrusion testing apparatus includes a testing platform, at least two clamping assemblies, and a connecting assembly. The clamping assemblies are disposed on the testing platform and arranged opposite each other to form a working cavity. The at least two clamping assemblies are used to clamp the battery cell through the working cavity. Each clamping assembly includes a clamping plate and a support member. The clamping plate is placed on the testing platform and arranged opposite each other to form the working cavity. The support member is connected to the side of the clamping plate away from the working cavity and extends along a direction perpendicular to the thickness of the clamping plate. The connecting assembly connects to the oppositely arranged clamping plates.

[0023] This device clamps the battery cell using opposing clamping components, forming a stable working chamber. The clamping plate provides horizontal fixation, while the support extends to support the clamping plate away from the working chamber, ensuring the clamping plate remains vertical and does not easily tilt during the compression test, thus evenly transmitting the clamping force to the battery cell surface. Furthermore, connecting components further reinforce the clamping plate, preventing loosening or displacement during testing and enhancing the overall structural rigidity. This design ensures the battery cell's stable position under force, effectively reducing deflection or displacement caused by uneven force during testing, thereby improving test accuracy. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the overall structure of the extrusion testing device and the battery cell provided in this embodiment of the utility model;

[0026] Figure 2 These are three views of the extrusion testing device provided in this embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure provided by an embodiment of the present invention to illustrate the connection relationship between the second connecting part and the first connecting part;

[0028] Figure 4 This is a structural schematic diagram of the second connecting part provided in an embodiment of the present invention;

[0029] Figure 5 This is a structural schematic diagram of the auxiliary part provided in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram illustrating the structure of the locking hole and the second locking part in an embodiment of this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the slide provided in this embodiment of the utility model.

[0032] Explanation of icon numbers:

[0033] 20. Test platform; 21. Slide groove; 22. Top plate; 30. Clamping assembly; 31. Clamping plate; 32. Support component; 40. Working chamber; 50. Connecting assembly; 51. First connecting part; 511. Nut; 512. Screw; 52. First locking part; 53. Second connecting part; 531. Connecting cylinder; 532. Connecting rod; 54. Second locking part; 60. Auxiliary part; 70. Locking hole; 80. Battery cell. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the overall structure of the extrusion testing device and the battery cell 80 provided in this embodiment of the utility model. Figure 2 These are three views of the extrusion testing device provided in this embodiment of the utility model.

[0036] This utility model provides a compression testing device, including: a testing platform 20, at least two clamping assemblies 30, and a connecting assembly 50. The clamping assemblies are disposed on the testing platform 20 and are arranged opposite each other to form a working cavity 40. The at least two clamping assemblies 30 are used to clamp a battery cell 80 through the working cavity 40. Each clamping assembly 30 includes a clamping plate 31 and a support member 32. The clamping plate 31 is placed on the testing platform 20 and is arranged opposite each other to form the working cavity 40. The support member 32 is connected to the side of the clamping plate 31 away from the working cavity 40 and extends along a direction perpendicular to the thickness of the clamping plate 31. The connecting assembly 50 connects to the oppositely arranged clamping plates 31.

[0037] In practical applications, the test platform 20 includes a top plate 22 for securing the battery cell 80. During the test preparation phase, clamping plates 31 are positioned opposite each other and placed on the test platform 20. The battery cell 80 is then placed within the formed working cavity 40, ensuring that the clamping plates 31 hold the larger side of the battery cell 80. Subsequently, the two clamping plates 31 are securely connected via the connecting assembly 50, and the battery cell 80 is moved so that its smaller side abuts against the top plate 22. During the test, the test equipment applies pressure to the smaller side of the battery cell 80 away from the top plate 22 to test whether the battery cell 80 is qualified.

[0038] The device clamps the battery cell 80 using opposing clamping components 30, forming a stable working cavity 40. A clamping plate 31 provides horizontal fixation, and a support member 32 extends to support the clamping plate 31 away from the working cavity 40, ensuring that the clamping plate 31 remains vertical and does not easily tilt during the compression test, thereby evenly transmitting the clamping force to the surface of the battery cell 80. Furthermore, the connecting component 50 further reinforces the clamping plate 31, preventing loosening or displacement during testing and enhancing the overall structural rigidity. This design ensures the battery cell 80 remains stable under force, effectively reducing deflection or displacement caused by uneven force during testing, thus improving test accuracy.

[0039] In this embodiment, two clamping components 30 are provided. In other embodiments, multiple clamping components 30 may be provided, and the multiple clamping components 30 are symmetrically arranged on both sides of the battery cell 80 relative to the battery cell 80.

[0040] Optionally, see Figure 1 and Figure 2 The width of the support member 32 gradually increases in the direction toward the test platform 20.

[0041] In practical applications, the width of the support member 32 gradually increases towards the test platform 20, which can increase the contact area between the support member 32 and the test platform 20, thereby improving the overall stability and anti-tilting ability of the extrusion test device.

[0042] In one embodiment, see Figure 1 and Figure 2 The connecting component 50 includes a first connecting part 51 and a first locking part 52. The first connecting part 51 passes through the clamping plates 31 on both sides of the working cavity 40 in sequence and abuts against one side of the clamping plate 31. The first locking part 52 is connected to the first connecting part 51 and abuts against the clamping plate 31 on the other side.

[0043] In practical applications, during the test preparation phase, the opposing clamping plates 31 are installed on the test platform 20 to form a working cavity 40, and the battery cell 80 is placed inside the working cavity 40, with the larger side of the battery cell 80 held by the clamping plates 31. The first connecting part 51 passes through the clamping plates 31 on both sides of the working cavity 40 in sequence and abuts against one side of the clamping plate 31, while the first locking part 52 is connected to the first connecting part 51 and abuts against the other side of the clamping plate 31, thereby connecting the opposing clamping plates 31 into a whole.

[0044] Further, see Figure 1 and Figure 2 The first connecting part 51 includes a nut 511 and a screw 512. The screw 512 passes through the clamping plate 31 and is threadedly engaged with the clamping plate 31. The nut 511 is connected to one end of the screw 512 and abuts against one side of the clamping plate 31. The first locking part 52 is connected to the end of the screw 512 away from the nut 511.

[0045] In practical applications, when connecting two opposing clamping plates 31, a screw 512 passes through and threadedly engages with the clamping plate 31. A nut 511 is connected to one end of the screw 512 and abuts against one side of the clamping plate 31. A first locking part 52 is connected to the other end of the screw 512 away from the nut 511 and abuts against the other side of the clamping plate 31. The threaded connection between the first locking part 52 and the screw 512 allows the first connecting part 51 to apply a precise and uniform tightening force to the clamping plate 31, achieving reliable fixation of the clamping plate 31.

[0046] Further, see Figure 3 The extrusion test device includes a second connecting part 53, which is disposed in the working chamber 40 and is used to connect the screw 512 and the clamping plate 31.

[0047] In practical applications, when the width of the battery cell 80 is greater than the length of the screw 512, the second connecting part 53 is first connected to one side of the clamping plate 31, and then the screw 512 is sequentially connected to the other side of the clamping plate 31 and the second connecting part 53, thereby achieving a connection between the opposing clamping plates 31. This method ensures that when clamping a battery cell 80 with a larger width, the clamping plates 31 can be securely connected through the second connecting part 53, and the clamping position of the clamping plates 31 can be adjusted using the screw 512. The second connecting part 53 achieves a stable connection between the clamping plates 31, especially when the battery cell 80 is large, providing additional support and adjustment space, thereby enhancing the adaptability and stability of the device.

[0048] Furthermore, referring to Figure 3 There are multiple second connecting parts 53, and the multiple second connecting parts 53 are connected end to end in sequence along the length direction of the screw 512.

[0049] In practical applications, when clamping large-size battery cells 80, multiple second connecting parts 53 are connected end to end in sequence, so that the screw 512 can be connected to the relatively arranged clamping plates 31 through multiple second connecting parts 53, which effectively improves the stability and adaptability of the extrusion testing device in clamping battery cells 80.

[0050] Optionally, refer to Figure 3 and Figure 4 The second connecting part 53 includes a connecting cylinder 531 and a connecting rod 532. The connecting cylinder 531 is connected to the screw 512, the connecting rod 532 is connected to the connecting cylinder 531, and the connecting rod 532 is connected to the clamping plate 31.

[0051] In practical applications, the connecting cylinder 531 is connected to the screw 512, the connecting rod 532 is connected to the connecting cylinder 531, and the connecting rod 532 is connected to the clamping plate 31, thereby achieving a stable connection between the clamping plates 31. This is especially important when handling large-size battery cells 80, ensuring the stability of the clamping plates 31 and the uniform transmission of clamping force. The second connecting part 53 includes the connecting cylinder 531 and the connecting rod 532. The connecting cylinder 531 not only serves as a connector but also locks adjacent connecting cylinders 531 or screws 512.

[0052] In one embodiment, reference is made to Figure 2 The number of connecting components 50 is multiple, and the multiple connecting components 50 are spaced apart along the length direction of the clamping plate 31.

[0053] In practical applications, by setting multiple connecting components 50, the clamping force is evenly distributed along the length of the clamping plate 31, which not only improves the stability and rigidity of the clamping plate 31, but also enhances the uniformity and adaptability of clamping, ensuring the stable position of the battery cell 80 during the test, avoiding deflection or displacement caused by uneven force, thereby improving the accuracy and consistency of the test.

[0054] Furthermore, referring to Figure 2 The working cavity 40 is formed between adjacent connecting components 50, and the working cavity 40 is used to place the battery cell 80.

[0055] In practical applications, the working cavity serves to position the battery cell 80. The lower connecting component 50 directly contacts the bottom of the battery cell 80 through its supporting function, providing the necessary support for the battery cell 80 during force application and ensuring that the battery cell 80 does not sink or become unstable during testing. The connecting components 50 on both sides effectively prevent the battery cell 80 from rotating during force testing by restricting its sides. In this way, the battery cell 80's posture remains stable and will not rotate or shift laterally due to the force applied by the testing equipment, ensuring that the clamping force is evenly distributed and the test results are more accurate and reliable.

[0056] In this embodiment, there are four connecting components 50, which are distributed along a rectangular array. When the battery cell 80 is placed in the working cavity 40, two connecting components 50 are located above the battery cell 80 and abut against the top wall of the battery cell 80, and two connecting components 50 are located below the battery cell 80 and abut against the bottom wall of the battery cell 80. In other embodiments, the number of connecting components 50 can be three, five, six, etc. The more connecting components 50 there are, the stronger the support and constraint effect on the battery cell 80.

[0057] Optionally, refer to Figure 2 The connecting components 50 are symmetrically arranged on both sides of the support member 32 relative to the support member 32.

[0058] In practical applications, the symmetrical arrangement of the connecting component 50 relative to the support member 32 produces significant technical benefits during the clamping and supporting of the battery cell 80. By evenly distributing the clamping force, the structural stability of the device is enhanced, ensuring the precise positioning of the battery cell 80, thereby improving the accuracy and stability during the testing process. This design optimizes the mechanical forces during the clamping process of the battery cell 80, improving the adaptability of the device and the testing accuracy.

[0059] In one embodiment, reference is made to Figure 5 The extrusion test device includes multiple auxiliary parts 60, which are disposed on the test platform 20 and connected to the opposite sides of the support member 32.

[0060] In practical applications, the auxiliary parts 60 are disposed on opposite sides of the support member 32, forming additional support for the support member 32. This arrangement significantly improves the anti-tilting ability of the support member 32, thereby maintaining the stability of the clamping plate 31.

[0061] In this embodiment, the auxiliary part 60 is elongated and extends in a direction perpendicular to the support member 32. In other embodiments, the auxiliary part 60 may also be circular, polygonal, or other shapes, as long as it can improve the support effect of the support member 32.

[0062] In one embodiment, reference is made to Figure 6 The connecting component 50 includes a second locking part 54. Both the support member 32 and the test platform 20 are provided with locking holes 70. The second locking part 54 passes through the locking holes 70 to lock the support member 32 and the test platform 20.

[0063] In practical applications, after the battery cell 80 is fixed to the clamping plate 31 and moved into place, the locking hole 70 on the support member 32 aligns with the locking hole 70 on the test platform 20. Then, the second locking part 54 is inserted into the locking hole 70 on the support member 32 and aligned with the locking hole 70 on the test platform 20, thereby restricting the horizontal movement of the clamping plate 31. This reduces loosening or displacement caused by force or external factors, ensuring the accuracy of the testing process.

[0064] In this embodiment, there are two support members 32, each with a locking hole 70, which is a circular hole. Multiple locking holes 70 on the test platform 20 are arranged in a rectangular array. In other embodiments, the locking holes 70 can be oblong or irregularly shaped holes, and multiple locking holes 70 on the test platform 20 can be arranged in a circular array.

[0065] In one embodiment, reference is made to Figure 7 The test platform 20 is provided with a slide groove 21, which extends along the direction perpendicular to the thickness of the clamping plate 31, and the support member 32 and the slide groove 21 are slidably engaged; and / or, the clamping plate 31 and the slide groove 21 are slidably engaged.

[0066] In practical applications, the design of the slide 21 mainly restricts the rotation of the clamping plate 31, ensuring that the clamping plate 31 can stably clamp the battery cell 80, thus avoiding uneven clamping and positional displacement of the battery cell 80 caused by rotation.

[0067] In this embodiment, the inner wall of the slide 21 and the support member 32 can be provided with either a smooth hole or a threaded hole. If a smooth hole is provided, a pin can be inserted through the hole to lock the position of the support member 32. If a threaded hole is provided, a bolt can be threaded into the two threaded holes to securely lock the position of the support member 32. These designs ensure the stability of the support member 32 during use, preventing displacement or loosening, thereby improving the accuracy and reliability of the device.

[0068] 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 specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0069] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0070] Furthermore, the use of terms such as "first" and "second" in this utility model 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. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0071] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A compression testing device, characterized in that, include: Test platform; At least two clamping assemblies are disposed on the test platform and arranged opposite each other to form a working cavity. The at least two clamping assemblies are used to clamp the battery cell through the working cavity. Each clamping assembly includes a clamping plate and a support member. The clamping plate is placed on the test platform and arranged opposite each other to form the working cavity. The support member is connected to the side of the clamping plate away from the working cavity and extends along a direction perpendicular to the thickness of the clamping plate. A connecting component connects the clamps that are positioned opposite each other.

2. The extrusion testing device according to claim 1, characterized in that, The width of the support gradually increases in the direction toward the test platform.

3. The extrusion testing device according to claim 1, characterized in that, The connecting assembly includes a first connecting part and a first locking part. The first connecting part passes through the clamping plates on both sides of the working cavity in sequence and abuts against the clamping plate on one side. The first locking part is connected to the first connecting part and abuts against the clamping plate on the other side.

4. The extrusion testing device according to claim 3, characterized in that, The first connecting part includes a nut and a screw rod. The screw rod passes through the clamping plate and is threadedly engaged with the clamping plate. The nut is connected to one end of the screw rod and abuts against one side of the clamping plate. The first locking part is connected to the end of the screw rod away from the nut.

5. The extrusion testing device according to claim 4, characterized in that, The extrusion testing device includes a second connecting part, which is disposed in the working chamber and is used to connect the screw and the clamping plate.

6. The extrusion testing apparatus according to claim 5, characterized in that, There are multiple second connecting parts, and the multiple second connecting parts are connected end to end in sequence along the length direction of the screw.

7. The extrusion testing device according to claim 5, characterized in that, The second connecting part includes a connecting cylinder and a connecting rod. The connecting cylinder is connected to the screw, the connecting rod is connected to the connecting cylinder, and the connecting rod is connected to the clamping plate.

8. The extrusion testing apparatus according to any one of claims 1 to 6, characterized in that, The number of connecting components is multiple, and the multiple connecting components are spaced apart along the length direction of the clamp.

9. The extrusion testing apparatus according to claim 8, characterized in that, The working cavity is formed between adjacent connecting components and is used to place the battery cell.

10. The extrusion testing apparatus according to claim 8, characterized in that, The connecting components are symmetrically arranged on both sides of the support member relative to the support member.

11. The extrusion testing apparatus according to any one of claims 1 to 6, characterized in that, The extrusion testing device includes multiple auxiliary parts, which are disposed on the testing platform and connected to opposite sides of the support member.

12. The extrusion testing apparatus according to any one of claims 1 to 6, characterized in that, The connecting component includes a second locking part, and both the support member and the test platform have locking holes. The second locking part passes through the locking holes to lock the support member and the test platform.

13. The extrusion testing apparatus according to any one of claims 1 to 6, characterized in that, The test platform is provided with a sliding groove that extends in a direction perpendicular to the thickness of the clamping plate, and the support member and the sliding groove are slidably engaged; and / or, the clamping plate and the sliding groove are slidably engaged.

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