Pole thrust testing device

Abstract

The utility model belongs to the technical field of lithium batteries, and mainly relates to a pole thrust testing device which comprises a locking assembly used for locking a bottom plate in a top cover assembly and a pushing assembly used for carrying out thrust testing on a pole in the top cover assembly. The locking assembly comprises a base as well as a fixed plate, a first baffle and a second baffle which extend in the thickness direction of the base, an embedding groove is formed between the fixed plate and the second baffle and is used for clamping the bottom plate, and a bearing groove is formed between the first baffle and the second baffle and is used for bearing the pole; the pushing assembly comprises a tensile machine, a pressing block fixed to the output end of the tensile machine and a positioning block arranged at the end, away from the tensile machine, of the pressing block, the tensile machine is used for driving the pressing block to downwards press the positioning block, and the positioning block is used for making contact with the pole; therefore, the technical scheme of the application solves the technical defects of large fluctuation of test results and inaccurate limit thrust value of a tensile machine caused by non-uniformity of stress and limitation of a contact surface of an existing pole thrust test device.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery technical field, concretely relates to a kind of pole thrust testing device. BACKGROUND

[0002] Lithium ion battery is widely used in consumer electronics, electric vehicle and energy storage system and other fields, and the reliability of its performance directly affects the safety and service life of the whole system. In the battery development process, various mechanical property tests need to be carried out on lithium batteries, especially square lithium ion batteries. As a key component of the battery, the mechanical property test of the pole is particularly important. The pole thrust limit test is an important method to evaluate the ability of the pole to resist external pushing force by testing the limit performance of the pole resisting external force in its lateral direction.

[0003] In the prior art, the pole thrust limit test scheme of the pole thrust test device mainly fixes and clamps the aluminum sheet, and then directly presses the block of the tension machine on the bottom side of the pole for testing. However, in the specific implementation process of this technical scheme, the output end axis of the tension machine is misaligned with the side surface of the pole due to the small contact surface of the block in the existing test device. The applied thrust does not fully act on the main stress area of the pole, which easily leads to distorted measurement results.

[0004] Therefore, it is urgent to improve the existing pole thrust test device to solve the technical defects of the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims at: in view of the deficiencies of the prior art, the existing pole thrust test device is improved to solve the technical defects of the existing pole thrust test device due to the non-uniformity of stress and the limitation of contact surface, and the fluctuation of test results and the inaccuracy of the limit thrust value of the tension machine.

[0006] In order to achieve the above technical purpose, the following technical scheme is implemented in the present application:

[0007] A pole thrust test device, comprising a locking assembly for locking the bottom plate in the top cover assembly and a pushing assembly for testing the thrust of the pole in the top cover assembly;

[0008] The locking assembly comprises a base, a fixed plate extending in the thickness direction of the base, a first baffle and a second baffle, an embedded groove is provided between the fixed plate and the second baffle, the embedded groove is used for clamping the bottom plate, a receiving groove is provided between the first baffle and the second baffle, and the receiving groove is used for receiving the pole;

[0009] The pushing assembly comprises a tension machine and a block fixed to the output end of the tension machine, a positioning block is provided at the end of the block away from the tension machine, the tension machine is used to drive the block to press down the positioning block, and the positioning block is used to contact the pole.

[0010] The technical scheme has the following technical effects:

[0011] The technical scheme of the present application proposes a new type of pole push test device. The core improvement is to redesign the structure of the locking assembly and the pushing assembly to solve the measurement distortion problem in the prior art. Among them, the locking assembly ensures that the pole does not displace during the test process through the fixed bottom plate, and fixes the pole position through the receiving groove in the two baffles, avoiding the offset problem of the force point. The design of the tension machine and the pressing block in the pushing assembly makes the pressing of the pressing block act uniformly and stably on the positioning block, and then the positioning block directly contacts the pole, ensuring that the force point is located at the center of the pole, reducing the error in the measurement process. Therefore, the improved technical scheme of the present application effectively reduces the risk of damage to the pole structure, avoids the test results being unreliable due to uneven stress, and ensures the repeatability and reliability of the test.

[0012] As a further improvement of the utility model discloses a kind of pole push test device, positioning block is offset to the side of geometric center line in the length direction of pressing block.

[0013] As a further improvement of the utility model discloses a kind of pole push test device, the side of geometric center line in the length direction of pressing block is used for being contacted with bottom plate, away from the positioning block offset.

[0014] As a further improvement of the utility model discloses a kind of pole push test device, second baffle is provided with two, respectively set in the two sides in the length direction of first baffle.

[0015] As a further improvement of the utility model discloses a kind of pole push test device, the ratio of the width value of receiving groove and the width value of the pole is a, and the value of a satisfies: 1

[0016] As a further improvement of the utility model discloses a kind of pole push test device, one receiving groove only receives one pole.

[0017] As a further improvement of the utility model discloses a kind of pole push test device, fixed plate is equipped with at least one threaded hole, threaded hole is used for assembling bolt, and bolt is threadedly connected with threaded hole.

[0018] As a further improvement of the utility model discloses a kind of pole push test device, the end of bolt is equipped with rubber sleeve, and rubber sleeve is used for abutting with bottom plate.

[0019] As a further improvement of the utility model discloses a kind of pole push test device, the end of bolt, away from rubber sleeve, is provided with nut.

[0020] As a further improvement of the utility model discloses a kind of pole push test device, bottom plate is light aluminum sheet. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0022] Figure 1 It is a structural schematic view of the existing pole thrust test device in embodiment 1 of the present application;

[0023] Figure 2 It is a structural schematic view of embodiment 1 of the present application;

[0024] Figure 3 It is a structural schematic view of the pushing assembly in embodiment 1 of the present application;

[0025] Figure 4 It is a structural schematic view of embodiment 2 of the present application;

[0026] Figure 5 It is a structural schematic view of embodiment 3 of the present application;

[0027] Figure 6 It is a structural schematic view of embodiment 4 of the present application;

[0028] Among them:

[0029] 1 - top cover assembly;

[0030] 11 - bottom plate;

[0031] 12 - pole;

[0032] 2 - locking assembly;

[0033] 21 - base;

[0034] 22 - fixed plate;

[0035] 221 - threaded hole;

[0036] 222 - bolt;

[0037] 2221 - rubber sleeve;

[0038] 2222 - nut;

[0039] 23 - first baffle;

[0040] 231 - receiving groove;

[0041] 24 - second baffle;

[0042] 25 - embedding groove;

[0043] 3 - push assembly

[0044] 31 - tension machine

[0045] 32 - pressing block

[0046] 33 - positioning block DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work under the premise that the embodiments in the present application are within the protection scope of the present application. Unless otherwise defined, all the technical and scientific terms used in the present application have the same meaning as that understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application.

[0048] In the description of the present application, unless otherwise explicitly defined and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0049] Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the claims, and any person skilled in the art can make several possible changes and modifications without departing from the concept of the present application, therefore, the protection scope of the present application should be limited by the scope defined by the claims of the present application.

[0050] The present application will be described in further detail below in combination with the specific embodiments, but the embodiments of the present application are not limited thereto.

[0051] Embodiment 1

[0052] According to Figure 1It can be seen that in the existing pole 12 design, the area of the protruding part of the bottom plate 11 is small, and the structure directly extends from the bottom plate 11, resulting in insufficient contact area between the pole 12 and the pressing block 32 of the output end of the tension machine 31. This design defect causes the center axis of the output end of the tension machine 31 to be misaligned when it contacts the pole 12, which in turn causes the force point of the tension machine 31 to deviate from the compaction line of action. Therefore, the detected pole 12 thrust limit test value is biased, and the value is higher than the actual value (the actual force is less than the force applied by the tension machine 31 due to the deviation of the force point). Based on this, the present application aims to solve the above technical problems.

[0053] As Figures 2-3 shown, the present application improves the existing pole 12 thrust test device to solve the above technical defects, specifically, the pole 12 thrust test device of the present application, including a locking assembly 2 for locking the bottom plate 11 in the top cover assembly 1 and a pushing assembly 3 for thrust test of the pole 12 in the top cover assembly 1; further, the locking assembly 2 contains a base 21 and a fixed plate 22 extending in the thickness direction of the base 21, a first baffle 23 and a second baffle 24, a embedding groove 25 is arranged between the fixed plate 22 and the second baffle 24, the embedding groove 25 is used for clamping the bottom plate 11, a receiving groove 231 is arranged between the first baffle 23 and the second baffle 24, the receiving groove 231 is used for receiving the pole 12; and the pushing assembly 3 includes a tension machine 31 and a pressing block 32 fixed to the output end of the tension machine 31, a positioning block 33 is arranged at the end of the pressing block 32 away from the tension machine 31, the tension machine 31 is used to drive the pressing block 32 to press down the positioning block 33, and the positioning block 33 is used to contact the pole 12. Thus, through the design of the locking assembly 2, the bottom plate 11 is firmly fixed during the test process, avoiding the movement or deformation of the bottom plate 11 during the test process, thereby ensuring the accuracy of the test.

[0054] At the same time, the setting of the receiving groove 231 enables the pole 12 to be stably received, further reducing the error in the test process. The design of the pushing assembly 3 ensures that the output force of the tension machine 31 can be uniformly and stably applied to the pole 12, thereby avoiding distortion of the test results caused by uneven force application. In addition, the design of the positioning block 33 also enables the pressing force of the pressing block 32 to directly act on the main stress area of the pole 12, further improving the accuracy of the test.

[0055] Specifically, how to position and clamp the top cover assembly 1 in this application, that is, the working principle of the embedding groove 25 is: in the locking assembly 2, the base 21 provides stable support, and the fixed plate 22, the first baffle 23 and the second baffle 24 jointly constitute the positioning structure of the top cover assembly 1. In particular, the embedding groove 25 between the second baffle 24 and the fixed plate 22 is designed to match the size of the bottom plate 11 (in the specific implementation process, the width of the embedding groove 25 can be adjusted so that the second baffle 24 and the fixed plate 22 can clamp the bottom plate 11), so that the bottom plate 11 can be firmly embedded therein. In this way, the top cover assembly 1 will not move or deform during testing, ensuring the accuracy of the test. It is worth noting that the embedding groove 25 formed between the second baffle 24 and the fixed plate 22 is the smallest embedding groove 25 forming unit in this application, and the embedding groove 25 can also be formed between the first baffle 23 and the fixed plate 22.

[0056] Specifically, the principle of the technical scheme of the application for testing the pole 12 is: the tension machine 31 in the pushing assembly 3 is the key equipment for providing the required pushing force. The output end of the tension machine 31 is fixedly connected with the pressing block 32, and when the tension machine 31 starts, it drives the pressing block 32 to move downward. The end of the pressing block 32 away from the tension machine 31 is provided with a positioning block 33, and the positioning block 33 is designed to be in close contact with the pole 12. During testing, the positioning block 33 uniformly and stably transmits the pushing force of the tension machine 31 to the pole 12. When the pole 12 is damaged due to the action of the tension machine 31, the real-time tension value recorded by the tension machine 31 is the limit pushing force value of the pole 12.

[0057] Further, the first baffle 23 and the second baffle 24 of the application constitute a receiving groove 231 for receiving the pole 12, so that when the pressing block 32 drives the positioning block 33, the positioning block 33 will not deviate (within the width range of the receiving groove 231), thereby improving the measurement accuracy of the tension machine 31. The design of the receiving groove 231 not only enables it to stably receive the pole 12, but also prevents the pole 12 from moving or tilting during testing. This design enables the positioning block 33 to more flexibly adapt to changes in the shape and position of the pole 12 when under stress, thereby reducing measurement errors caused by inaccurate positioning.

[0058] Further, the bottom plate 11 is a light aluminum sheet structure, which has good rigidity and flatness, ensuring the accuracy of the test. At the same time, the material selection of the light aluminum sheet also helps to reduce friction and wear during testing, prolonging the service life of the testing device. In addition, the light aluminum sheet is easy to process and clean, reducing maintenance costs.

[0059] Embodiment 2

[0060] AsFigure 4 As shown, unlike Embodiment 1, to further improve the accuracy of the tensile test value of the pole post 12 thrust testing device of this application, the positioning block 33 is further offset to one side along the geometric center line of the pressure block 32 in the length direction. Therefore, the position of the positioning block 33 on the pressure block 32 is no longer symmetrical, but offset to one side. This design allows the positioning block 33 to more accurately align with the force center of the pole post 12 when it contacts the pole post 12, reducing measurement errors caused by positioning deviations. At the same time, the offset design of the positioning block 33 can also compensate for measurement errors caused by changes in the shape or position of the pole post 12 to a certain extent, further improving the accuracy of the test.

[0061] Furthermore, the side of the positioning block 33 furthest from the geometric center line offset along the length of the pressure block 32 is designed to contact the base plate 11. Thus, during testing, when the positioning block 33 presses down on the pole post 12, the side furthest from the geometric center line will contact the base plate 11. This design not only increases the stability of the positioning block 33, preventing it from shaking or shifting during testing, but also allows the positioning block 33 to distribute pressure more evenly on the pole post 12.

[0062] In this way, even if the shape or position of the pole post 12 changes, the positioning block 33 can compensate for these changes through its offset design and contact with the base plate 11, thereby ensuring the accuracy and reliability of the test. It is worth noting that, in the specific implementation, the offset of the positioning block 33 from the geometric center line offset along the length direction of the pressure block 32 is 1 / 4 of the thickness of the positioning block 33. This further solves the problem of contact misalignment between the pressure block 32 and the pole post 12.

[0063] Other aspects that are the same as in Implementation Method 1 will not be described again in this implementation method.

[0064] Implementation Method 3

[0065] like Figures 1-5 As shown, unlike embodiment 1, in order to further reduce the technical defects of the contact offset between the pole post 12 and the pressure positioning block 33, the ratio of the width of the receiving groove 231 to the width of the pole post 12 is 'a', and the value of 'a' satisfies: 1 < a ≤ 2. (In specific implementation, the width value is as follows...) Figure 5 (The X-axis direction is shown). The design mechanism of the aforementioned ratio 'a' is that the width of the receiving groove 231 must be greater than the width of the pole post 12 so that the pole post 12 can be inserted into the receiving groove 231. Furthermore, considering the adaptability of the receiving groove 231 to different types of pole posts 12, the width of the receiving groove 231 can be adjusted to a maximum of a multiple of the width of a single type of pole post 12.

[0066] Therefore, the design of the receiving groove 231 not only can stably accommodate the pole 12, but also provides sufficient space for the slight movement or deformation of the pole 12 during the test. This design reduces the measurement error caused by the friction or clamping between the pole 12 and the receiving groove 231, and ensures the accuracy of the test.

[0067] At the same time, the width value of the receiving groove 231 is designed to be 1-2 times the width value of the pole 12, so that the receiving groove 231 can flexibly adapt to poles 12 of different sizes, improving the versatility and practicality of the pole 12 thrust test device of the present application. In the specific implementation process, the width value of the receiving groove 231 can be adjusted according to actual needs to achieve the best test effect. In addition, in order to ensure that each receiving groove 231 can only accommodate one pole 12, the width value of the receiving groove 231 is generally controlled around the width value of the pole 12, further reducing the problem of contact bias between the pressing block 32 and the pole 12.

[0068] Other than the same as embodiment 1, this embodiment will not be described again.

[0069] Embodiment 4

[0070] As shown in Figures 1-6 different from embodiment 1: in order to further improve the locking degree of the locking assembly 2 on the bottom plate 11. Further, the fixed plate 22 is provided with at least one threaded hole 221, and the threaded hole 221 is used to assemble a bolt 222, and the bolt 222 is threadedly connected with the threaded hole 221. Therefore, through the threaded connection of the bolt 222 and the threaded hole 221, the fixed plate 22 can more firmly lock the bottom plate 11, preventing it from moving or deforming during the test. This design not only improves the stability of the locking assembly 2, but also ensures the accuracy of the test.

[0071] In the specific implementation process, the number and position of the threaded hole 221 can be adjusted according to actual needs to achieve the best locking effect. In addition, the threaded connection of the bolt 222 and the threaded hole 221 also has the advantages of easy disassembly and assembly, which facilitates the use and maintenance of the test device. It is worth noting that in order to further increase the stability of the locking, one end of the bolt 222 can also be provided with a rubber sleeve 2221. The rubber sleeve 2221 has a certain elasticity and friction, which can better fit with the bottom plate 11, preventing it from sliding or loosening during the test. At the same time, the rubber sleeve 2221 can also reduce the stress concentration caused by the tightening of the bolt 222 to a certain extent, protecting the bottom plate 11 from being damaged. In the specific implementation process, the material and thickness of the rubber sleeve 2221 can be selected according to actual needs to achieve the best locking and buffering effect.

[0072] Further, the bolt 222 is provided with a nut 2222 at the end away from the rubber sleeve 2221. Thus, the design of the nut 2222 not only facilitates the fastening and dismounting of the bolt 222, but also ensures that the bolt 222 will not loosen due to vibration or external force during the test. This design further improves the stability and reliability of the locking assembly 2, ensuring the accuracy of the test.

[0073] The preferred embodiments of the present application have been described above with the aid of drawing figures, and are not intended to limit the present application, for which all modifications and variations obvious to those skilled in the art should be considered acceptable.

Claims

1. A pole push test device, characterized by, The application relates to a locking assembly (2) for locking a bottom plate (11) in a top cover assembly (1) and a pushing assembly (3) for thrust test of a pole (12) in the top cover assembly (1). The locking assembly (2) comprises a base (21), a fixed plate (22) arranged in the thickness direction of the base (21), a first baffle (23) and a second baffle (24), an embedded groove (25) is arranged between the fixed plate (22) and the second baffle (24), the embedded groove (25) is used for clamping the bottom plate (11), and a receiving groove (231) is arranged between the first baffle (23) and the second baffle (24), the receiving groove (231) is used for receiving the pole (12). The pushing assembly (3) comprises a tension machine (31) and a pressing block (32) fixed to the output end of the tension machine (31), a positioning block (33) is arranged at the end of the pressing block (32) away from the tension machine (31), the tension machine (31) is used for driving the pressing block (32) to press down the positioning block (33), and the positioning block (33) is used for contacting the pole (12).

2. A pole push test device according to claim 1, wherein The positioning block (33) is offset to one side of the geometric center line in the length direction of the pressing block (32).

3. A pole thrust testing device according to claim 2, wherein The positioning block (33) is used for contacting the bottom plate (11) and is offset to one side away from the geometric center line in the length direction of the pressing block (32).

4. A pole push test device according to claim 1, wherein The second baffle (24) is provided with two, which are arranged on both sides of the length direction of the first baffle (23).

5. A pole push test device as defined in claim 1, wherein The ratio of the width value of the receiving groove (231) to the width value of the pole (12) is a, and the value of a satisfies 1 < a <= 2.

6. A pole push test device according to claim 5, wherein One receiving groove (231) only receives one pole (12).

7. A pole push testing device as defined in claim 1, wherein, The fixed plate (22) is provided with at least one threaded hole (221), the threaded hole (221) is used for assembling a bolt (222), and the bolt (222) is in threaded connection with the threaded hole (221).

8. A pole push test device according to claim 7, wherein One end of the bolt (222) is provided with a rubber sleeve (2221), and the rubber sleeve (2221) is used for abutting against the bottom plate (11).

9. A pole push test device according to claim 8, wherein, One end of the bolt (222) away from the rubber sleeve (2221) is provided with a nut (2222).

10. A pole push testing device according to claim 1, wherein The bottom plate (11) is an aluminum sheet.

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