Battery cycle test fixture with uniform stress

Abstract

The utility model discloses a battery cycle test fixture with uniform stress, which relates to the technical field of battery testing, and comprises a side plate and a screw rod, the top end of the side plate is provided with a fixed clamping plate, the bottom of the side plate is provided with a bottom plate, and the screw rod penetrates through the fixed clamping plate and can move up and down along the vertical direction. One end of the screw rod is connected with a rotating handle, the other end of the screw rod is fixedly provided with a lower pressing block, and a pressure dividing device is connected below the lower pressing block. According to the utility model, the cycle time is short, a cycle test of expansion force can be carried out on the soft package battery cell, and a buffer effect can be achieved through the voltage dividing device, so that the soft package battery cell is uniformly stressed, and the deformation of the mold is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery test technical field, concretely is a kind of even force battery cycle test fixture. BACKGROUND

[0002] The shape of soft package battery cell mainly includes rectangle and cylinder, and the soft package battery cell usually adopts aluminum-plastic film as packaging material, which has the characteristics of lightness, thinness and flexibility, making the soft package battery cell more flexible in shape. Since the soft package battery cell has no hard shell plasticity, it is prone to deformation.

[0003] If the battery cycle test fixture in the prior art expands, it will cause local pressure to be relatively large, which is easy to cause lithium precipitation of the battery cell. Moreover, the longer the cycle time is, the more serious the gas production of the battery cell is, and the expansion force will gradually increase. Since the stress of the soft package battery cell is not very uniform, the expansion stress is uneven, which will cause the mold to deform and fail to achieve the expected test effect. Therefore, there is a need for a battery cycle test fixture with uniform stress to solve the above technical problems. SUMMARY

[0004] Therefore, the utility model provides a kind of even force battery cycle test fixture, compared with traditional battery fixture test device, the cycle time of the utility model is short, not only can the expansion force of soft package battery cell be tested, but also can the buffering effect be achieved by pressure dividing device, so that soft package battery cell is uniformly stressed, and mold deformation is not caused.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A kind of even force battery cycle test fixture, including side plate and screw rod, the top of the side plate is provided with fixed clamping plate, the bottom of the side plate is provided with bottom plate, the screw rod is passed through fixed clamping plate and can be moved up and down along vertical direction, one end of the screw rod is connected with rotating handle, the other end is fixedly installed with lower block, the lower block is connected with pressure dividing device below.

[0007] Further, a threaded hole is formed in the center of the fixed clamping plate, and a screw sleeve is fixedly installed at the threaded hole, and the screw sleeve cooperates with the screw rod.

[0008] Further, the pressure dividing device includes spring clamping plate, test clamping plate and spring, the spring clamping plate is fixedly connected with the lower block, a plurality of standard guide columns are circumferentially arranged between the bottom plates, a spring is arranged between the spring clamping plate and the test clamping plate, the standard guide columns pass through the test clamping plate, the spring and the spring clamping plate in sequence from bottom to top, and a plurality of equal-height screws are arranged on the two sides of the spring clamping plate.

[0009] Further, a stiffening plate is arranged between the side plate and the fixed clamping plate.

[0010] Further, the surfaces of the side plate, the fixed clamping plate, the stiffening plate and the bottom plate are plated with cadmium.

[0011] Further, the spring clamping plate and the test clamping plate are made of aviation aluminum material, and the surfaces are sprayed with sand.

[0012] Further, the high screw is made of stainless steel screw.

[0013] The utility model discloses the beneficial effect lies in:

[0014] The utility model discloses simple operation convenient to use, and practicality is strong, and the rotation of screw rod can make the inflation force circulation test to soft package electric core, can also play a buffering effect through partial pressure device, makes soft package electric core even stress, reduces the gas production and inflation force of soft package electric core, prevents the deformation of battery in the testing process. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only the embodiment of the utility model, and for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to the provided drawing.

[0016] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0017] Fig. 2 It is the front view of the utility model;

[0018] Among them, in the drawing:

[0019] 1-side plate;2-stiffening plate;3-fixed clamping plate;4-bottom plate;5-high screw;6-spring;7-pressing block;8-spring clamping plate;9-test clamping plate;10-screw rod;11-rotary handle;12-screw sleeve;13-standard guide column. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled person in the art without creative labor belong to the protection scope of the utility model.

[0021] Please refer to the attached Figs. 1-2The utility model provides a kind of even stress battery cycle test fixture, including side plate 1 and screw rod 10, the top of side plate 1 is provided with fixed clamping plate 3, the bottom of side plate 1 is provided with bottom plate 4, screw rod 10 is passed through fixed clamping plate 3 and can be moved up and down along vertical direction, one end of screw rod 10 is connected with rotating handle 11, and the other end is fixedly installed with down pressure block 7, down pressure block 7 is connected with pressure dividing device, by screw rod 10 rotation, a fixed pressure is applied to the soft package battery cell below, then a cycle test of inflation force is done, initial pressure is expected to be 1500N, and subsequent growth pressure should continue to increase to 20000N.

[0022] Preferably, the fixed clamping plate 3 is centrally provided with a threaded hole, and a screw sleeve 12 is fixedly installed at the threaded hole.

[0023] Preferably, the pressure dividing device includes a spring clamping plate 8, a test clamping plate 9 and a spring 6, the spring clamping plate 8 is fixedly connected with the down pressure block 7, a plurality of standard guide columns 13 are circumferentially arranged between the bottom plates 4, the spring 6 is arranged between the spring clamping plate 8 and the test clamping plate 9, the standard guide columns 13 are sequentially penetrated through the test clamping plate 9, the spring 6 and the spring clamping plate 8 from bottom to top, a plurality of equal-height screws 5 are arranged on both sides of the spring clamping plate 8, the spring 6 can play a buffering role, the equal-height screws 5 play a limiting role, and the standard guide columns 13 can clamp the spring 6 between the spring clamping plate 8 and the test clamping plate 9 to prevent the spring 6 from falling off from both ends of the standard guide columns 13.

[0024] Preferably, a stiffened plate 2 is arranged between the side plate 1 and the fixed clamping plate 3 to play a role of fixed support and increase the stability of the device.

[0025] Preferably, the surfaces of the side plate 1, the fixed clamping plate 3, the stiffened plate 2 and the bottom plate 4 are plated with cadmium, which has good ductility and corrosion resistance, thereby increasing the practicability of the device.

[0026] Preferably, the spring clamping plate 8 and the test clamping plate 9 are made of aviation aluminum material, and the surfaces thereof are sprayed with sand, thereby increasing the compressive strength of the device and reducing the manufacturing cost.

[0027] Preferably, the equal-height screws 5 are made of stainless steel screws, thereby increasing the corrosion resistance and tensile strength of the device.

[0028] The specific operation method of the utility model is as follows:

[0029] First, the battery to be tested is placed between the base plate 4 and the spring clamp plate 8, second, the operator rotates the rotary handle 11, the screw rod 10 drives the lower pressing block 7 to extrude the spring clamp plate 8, the spring clamp plate 8 downwardly transmits force to the spring 6, the spring 6 plays a buffering role, finally, the force is evenly distributed to the test clamp plate 9, the test clamp plate 9 extrudes the battery, and one-time swelling force test of the battery is completed, the initial pressure is expected to be 1500N, and the maximum subsequent growth pressure is continuously increased to 20000N, since the force on the spring clamp plate 8 can be evenly distributed to the test clamp plate 9 through the spring 6, the battery below can be evenly stressed, and deformation of the soft package battery cell in the battery is prevented.

[0030] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cycle test fixture with uniform force, characterized in that, Includes a side plate (1) and a screw (10). The top of the side plate (1) is provided with a fixed clamping plate (3), and the bottom of the side plate (1) is provided with a base plate (4). The screw (10) passes through the fixed clamping plate (3) and can move up and down in the vertical direction. One end of the screw (10) is connected to a rotating handle (11), and the other end is fixedly installed with a pressure block (7). A pressure dividing device is connected below the pressure block (7).

2. The battery cycle test fixture with uniform force according to claim 1, characterized in that, The fixed clamp (3) has a threaded hole in the center, and a screw sleeve (12) is fixedly installed at the threaded hole. The screw sleeve (12) cooperates with the screw rod (10).

3. The battery cycle test fixture with uniform force according to claim 1, characterized in that, The pressure dividing device includes a spring clamp (8), a test clamp (9), and a spring (6). The spring clamp (8) is fixedly connected to the lower pressure block (7). Multiple standard guide posts (13) are arranged circumferentially between the base plates (4). A spring (6) is arranged between the spring clamp (8) and the test clamp (9). The standard guide post (13) passes through the test clamp (9), the spring (6), and the spring clamp (8) from bottom to top. Multiple equal-height screws (5) are arranged on both sides of the spring clamp (8).

4. The battery cycle test fixture with uniform force according to claim 1, characterized in that, A stiffening plate (2) is provided between the side plate (1) and the fixed clamping plate (3).

5. A battery cycle test fixture subjected to uniform force according to claim 1, characterized in that, The surfaces of the side plate (1), the fixing clamp (3), the stiffening plate (2) and the bottom plate (4) are all plated with cadmium.

6. The battery cycle test fixture with uniform force according to claim 3, characterized in that, Both the spring clamp (8) and the test clamp (9) are made of aviation aluminum and are coated with sand.

7. A battery cycle test fixture subjected to uniform force according to claim 3, characterized in that, The equal-height screw (5) is made of stainless steel.

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