Device for testing tensile property of lithium battery shell

Abstract

The utility model belongs to the technical field of battery shell testing, and particularly relates to a lithium battery shell tensile property testing device which comprises a bottom plate, a lithium battery shell installed on the top of the bottom plate, an installation block assembled in the middle of the lithium battery shell, and a telescopic assembly installed in the installation block. The telescopic assembly pushes a side plate of the lithium battery shell in the lithium battery shell and comprises hydraulic cylinders installed in an installation block, the hydraulic cylinders are arranged on the left side and the right side of the installation block, stroke rods of the hydraulic cylinders face the side plate of the lithium battery shell and are provided with pushing plates, and the stroke rods of the hydraulic cylinders are provided with threads. The outer side of the thread is in threaded connection with a threaded column, the threaded column is rotationally connected with the pushing plate, and sliding strips are fixed to the top and the bottom of the mounting block correspondingly. According to the utility model, the tensile property test can be carried out under the condition that the interior of the lithium battery shell is completely closed, and the accuracy of the test result and the reliability of the battery are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery shell test technical field, concretely relates to a kind of testing device of lithium battery shell tensile property. BACKGROUND

[0002] In modern electronic equipment, lithium battery is widely used in various portable devices as a kind of efficient, portable energy solution, with the development of technology, the safety performance and reliability of lithium battery are more and more high, lithium battery shell as an important part of battery, its mechanical properties, especially tensile property, is crucial to the safety and stability of battery, therefore, tensile property test is carried out to lithium battery shell to ensure that its structure integrity can be maintained under various environments and conditions, it is an indispensable link in battery manufacturing and quality control process;

[0003] Traditional lithium battery shell tensile property test method usually needs to open or partially open shell, so that the fixture of test equipment can be clamped to test part of shell, however, this test method has certain limitations, first, opening shell can damage its internal closed environment, resulting in that test result cannot truly reflect the performance of shell in actual use;

[0004] In order to solve the above problems, some improved test devices appear in prior art, for example, special fixture or sealing device is used to maintain the closed property of shell to a certain extent. However, these methods still have some deficiencies, such as poor sealing effect, complex test process, high cost and other problems;

[0005] Therefore, at present, it is urgent to provide a device capable of carrying out tensile property test on lithium battery shell in closed environment, to improve the accuracy and simulation effect of test. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of testing device of lithium battery shell tensile property, can carry out tensile property test under the condition that lithium battery shell is completely closed, ensure the accuracy of test result and the reliability of battery.

[0007] The technical scheme adopted by the utility model is as follows:

[0008] A kind of testing device of lithium battery shell tensile property, including bottom plate, the top of the bottom plate is installed with lithium battery shell, the middle part of the lithium battery shell is equipped with mounting block, the mounting block is installed with telescopic assembly, the telescopic assembly is pushed to the side plate of the lithium battery shell in the lithium battery shell.

[0009] The telescopic assembly comprises hydraulic cylinders installed in mounting blocks, and the hydraulic cylinders are arranged on the left and right sides of the mounting blocks, and the stroke rods of the hydraulic cylinders are arranged towards the side plates of the lithium battery shell and are provided with push plates.

[0010] A threaded wire is installed on the stroke rod of the hydraulic cylinder, an external thread of the threaded wire is connected with a threaded column, and the threaded column is rotationally connected with the push plate.

[0011] The top and bottom of the mounting block are fixed with sliding strips, the top and bottom of the lithium battery shell are provided with sliding racks matched with the sliding strips, and the sliding strips are slidingly connected in the sliding racks.

[0012] The push plate is provided with a plurality of pressure sensors close to the side plates of the lithium battery shell.

[0013] The top of the bottom plate and on both sides of the lithium battery shell are fixed with mounting racks, and the mounting racks are provided with observers close to one side of the lithium battery shell.

[0014] The utility model discloses technical effects are obtained:

[0015] The utility model discloses can be completely sealed to lithium battery shell, and through starting hydraulic cylinder, make the hydraulic cylinder drive push plate and push the side plate of lithium battery shell, make the side plate of lithium battery shell appear stretch case, and then can carry out stretch performance test under the condition that lithium battery shell is completely closed, ensure the accuracy of test result and the reliability of battery. DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is the sectional view of lithium battery shell in the utility model;

[0018] Figure 3 It is the structural schematic diagram between mounting block, push plate and hydraulic cylinder in the utility model;

[0019] Figure 4 It is the structural schematic diagram between hydraulic cylinder, threaded column and push plate in the utility model.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1, bottom plate;2, lithium battery shell;3, mounting block;4, hydraulic cylinder;5, push plate;6, sliding rack;7, sliding strip;8, pressure sensor;9, threaded wire;10, threaded column;11, mounting rack;12, observer. Specific implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figures 1-4 As shown, a testing device for the tensile properties of a lithium battery casing includes a base plate 1, a lithium battery casing 2 mounted on the top of the base plate 1, a mounting block 3 assembled in the middle of the lithium battery casing 2, a telescopic component installed inside the mounting block 3, and the telescopic component pushing the side plate of the lithium battery casing 2 inside the lithium battery casing 2.

[0024] The telescopic component is used to push the side plate of the lithium battery housing 2 inside the lithium battery housing 2, thereby testing the tensile performance of the lithium battery housing 2. The mounting block 3 is equipped with a battery, so that the mounting block 3 and the telescopic component can be tested in a completely sealed state, ensuring the test effect. The outer side of the lithium battery housing 2 is also equipped with a controller, which can control the extension length and force of the telescopic component to test the tensile effect of different models of lithium battery housing 2.

[0025] See attached document Figure 2 and attached Figure 3 The telescopic assembly includes a hydraulic cylinder 4 installed inside the mounting block 3, and the hydraulic cylinder 4 is located on the left and right sides of the mounting block 3. The stroke rod of the hydraulic cylinder 4 faces the side plate of the lithium battery housing 2 and is equipped with a push plate 5. Furthermore, multiple pressure sensors 8 are installed on the push plate 5 near the side plate of the lithium battery housing 2. Through the setting of the pressure sensors 8, the pressure sensors 8 can receive pressure data and transmit it to the operator's controller, so that the operator can know the pressure inside the lithium battery housing 2. Furthermore, mounting brackets 11 are fixed on the top of the base plate 1 and on both sides of the lithium battery housing 2. An observer 12 is installed on the side of the mounting bracket 11 near the lithium battery housing 2. Through the setting of the observer 12, the observer 12 can observe the outside of the lithium battery housing 2, so as to observe the deformation effect of the lithium battery housing 2 using electronic devices and improve the observation effect. The observer 12 can be a camera, electronic infrared sensor, or other devices.

[0026] When the hydraulic cylinder 4 is driven, its stroke rod can drive the push plate 5 to move, thereby causing the push plate 5 to push the side plate of the lithium battery casing 2, so that the side plate can be tested for tensile performance under the push of the push plate 5.

[0027] See attached document Figure 4The threaded wire 9 is arranged on the stroke rod of the hydraulic cylinder 4, the outer side of the threaded wire 9 is threadedly connected with the threaded column 10, and the threaded column 10 is rotationally connected with the pushing plate 5, the pushing plate 5 has various types and various specification shapes, when it is required to replace the shape of the pushing plate 5 to reach different test environments, the threaded column 10 can be screwed, so that the threaded column 10 rotates on the pushing plate 5, and the threaded column 10 is threadedly connected with the threaded wire 9, so that the threaded column 10 gradually separates from the threaded wire 9, thereby the pushing plate 5 is separated from the stroke rod of the hydraulic cylinder 4, a new pushing plate 5 is taken, and the above steps are reversely operated, so that different pushing plates 5 can be quickly replaced.

[0028] According to the above structure, the top and bottom of the mounting block 3 are fixed with the sliding bars 7, the top and bottom inside the lithium battery shell 2 are provided with the sliding frames 6 matched with the sliding bars 7, and the sliding bars 7 are slidingly connected in the sliding frames 6, when the mounting block 3 is installed, the sliding bar 7 can be inserted into the groove of the sliding frame 6, so that the mounting block 3 is limited, and it is guaranteed that the mounting block 3 is at the central position of the lithium battery shell 2.

[0029] The above only describes the preferred embodiments of the present application, and it should be noted that, for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, without special description and limitation.

Claims

1. A device for testing the tensile properties of lithium battery casings, comprising a base plate (1), characterised in that: The top of the bottom plate (1) is provided with a lithium battery shell (2), the middle of the lithium battery shell (2) is provided with a mounting block (3), the mounting block (3) is provided with a telescopic assembly, and the telescopic assembly pushes the side plate of the lithium battery shell (2) in the lithium battery shell (2).

2. The device for testing the tensile property of a lithium battery case shell according to claim 1, characterized in that: The telescopic assembly comprises a hydraulic cylinder (4) mounted in the mounting block (3), the hydraulic cylinder (4) is arranged on the left and right sides of the mounting block (3), and the stroke rod of the hydraulic cylinder (4) is arranged towards the side plate of the lithium battery shell (2) and provided with a pushing plate (5).

3. The device for testing the tensile property of a lithium battery case shell according to claim 2, characterized in that: The stroke rod of the hydraulic cylinder (4) is provided with a threaded wire (9), the threaded wire (9) is provided with a threaded column (10) in threaded connection on the outer side, and the threaded column (10) is rotationally connected with the pushing plate (5).

4. The device for testing the tensile property of a lithium battery case shell according to claim 1, characterized in that: The top and bottom of the mounting block (3) are fixedly provided with sliding strips (7), the top and bottom of the lithium battery shell (2) are provided with sliding racks (6) matched with the sliding strips (7), and the sliding strips (7) are slidingly connected in the sliding racks (6).

5. The device for testing the tensile property of a lithium battery case shell according to claim 2, characterized in that: The pushing plate (5) is provided with a plurality of pressure sensors (8) arranged close to the side plate of the lithium battery shell (2).

6. The device for testing the tensile property of a lithium battery case shell according to claim 1, characterized in that: The top of the bottom plate (1) and on both sides of the lithium battery shell (2) are fixedly provided with mounting racks (11), and the mounting racks (11) are provided with observers (12) arranged close to one side of the lithium battery shell (2).

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