Battery cell side face extrusion test tool

Abstract

The utility model provides a battery cell side surface extrusion test tool. The battery cell side surface extrusion test tool comprises a baffle; the two fixing side plates are symmetrically arranged and comprise first plate bodies and second plate bodies, the second plate bodies are vertically fixed to one ends of the first plate bodies, the first plate bodies are arranged on the baffle in a sliding mode, first fixing structures are arranged between the first plate bodies and the baffle, and the second plate bodies on the two fixing side plates are oppositely arranged and used for clamping the surfaces of the battery cells in the thickness direction; the movable side plate is arranged on the second plate body and can stretch out and draw back in the direction, perpendicular to the first plate body, of the second plate body, the movable side plate is used for clamping the surface of the battery cell in the thickness direction, and a second fixing structure is arranged between the movable side plate and the second plate body. The distance between the fixed side plates can be adjusted, and the movable side plates can be telescopically adjusted on the second plate, so that the tool can adapt to battery cells with various thicknesses and lengths, the requirements on a plurality of sets of tools are reduced, the battery cells are ensured to be always clamped by two side surfaces in the extrusion test process, and the bending risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a side extrusion test tooling for battery cells. Background Art

[0002] The extrusion test of lithium battery cells is an important part in the safety assessment of power batteries. The mandatory detection requirements in the GB38031 standard clearly state that the extrusion direction should be consistent with the vehicle driving direction. Due to the different orientations of lithium-ion batteries installed on vehicles, the extrusion direction during testing may act on the large surface direction or the side direction of the battery cells.

[0003] Generally, the extrusion test for the large surface direction of battery cells is relatively simple and can be completed without using additional fixture tooling. However, when the extrusion direction acts on the side of the battery cells, especially for those battery cells with a small thickness and a large length, the test process will become relatively complex, mainly facing the following problems:

[0004] 1. Problem of battery cell bending: When conducting the extrusion test in the side direction, if the battery cells with a small thickness and a large length are not using fixtures, they are prone to bending deformation during the test, which will affect the accuracy of the test results and even lead to test failure.

[0005] 2. Poor adaptability of fixtures: Traditional fixture tooling often has limitations when adapting to different models of battery cells. Due to the large differences in the thickness and length dimensions of battery cells, for the side extrusion test of different battery cells, it is often necessary to develop tooling separately for each model. This not only increases the test cost but also reduces the test efficiency, making it difficult to meet the needs of diversified battery cell testing. Summary of the Utility Model

[0006] In view of this, the utility model provides a side extrusion test tooling for battery cells, aiming to solve the problem of bending deformation of battery cells with a small thickness and a large length during the side direction extrusion test, improve the adaptability of fixtures, reduce the need for developing multiple sets of tooling, thereby reducing the test cost and improving the test efficiency.

[0007] The technical solution of the utility model is realized as follows:

[0008] The utility model provides a side extrusion test tooling for battery cells, including:

[0009] A baffle plate for contacting one end of the battery cell in the length direction;

[0010] There are two fixed side plates symmetrically arranged, including a first plate body and a second plate body. The second plate body is vertically fixed at one end of the first plate body. The first plate body is slidably arranged on the baffle and can move horizontally along the length direction of the baffle. A first fixing structure is arranged between the first plate body and the baffle. The second plate bodies on the two fixed side plates are arranged oppositely to clamp the surfaces of the battery cell in the thickness direction.

[0011] The movable side plate is arranged on the second plate body and can expand and contract along the direction perpendicular to the first plate body of the second plate body. The movable side plate is used to clamp the surfaces of the battery cell in the thickness direction. A second fixing structure is arranged between the movable side plate and the second plate body.

[0012] On the basis of the above technical solution, preferably, the first fixing structure includes a strip hole, a first threaded hole and a first fastening bolt. There are two strip holes arranged in parallel along the width direction of the baffle, and the strip holes are parallel to the length direction of the baffle. A plurality of first threaded holes are arranged at equal intervals along the length direction of the baffle. The first fastening bolt passes through the strip hole and is connected to the first threaded hole.

[0013] On the basis of the above technical solution, preferably, a first chute with a T-shaped structure is opened on the outer side wall of the second plate body. The first chute is perpendicular to the first plate body. The movable side plate is slidably arranged in the first chute, and the outer side wall of the movable side plate is flush with the outer side wall of the second plate body.

[0014] On the basis of the above technical solution, preferably, the second fixing structure includes a second fastening bolt and a second threaded hole. A plurality of second threaded holes are opened at equal intervals along the direction perpendicular to the first plate body on the inner side wall of the second plate body. The second threaded hole is communicated with the first chute. The second fastening bolt passes through the second threaded hole and abuts against the inner wall of the movable side plate.

[0015] On the basis of the above technical solution, preferably, a plurality of first scale lines are arranged at equal intervals along the length direction of the side wall of the baffle.

[0016] On the basis of the above technical solution, preferably, a plurality of second scale lines are arranged at equal intervals along the length direction of the side wall of the movable side plate.

[0017] On the basis of the above technical solution, preferably, a second chute is arranged on the surface of the baffle along its length. A slide rail slidably connected to the second chute is arranged on the bottom surface of the first plate body.

[0018] On the basis of the above technical solution, preferably, the fixed side plate further includes a reinforcing plate, and the reinforcing plate is fixedly arranged between the first plate body and the second plate body.

[0019] The utility model has the following beneficial effects compared with the prior art:

[0020] (1) The cell side extrusion test tooling disclosed by the present utility model can adjust the distance between the fixed side plates and the movable side plate can be telescopically adjusted on the second plate, enabling the tooling to adapt to cells of various thicknesses and lengths, reducing the need for multiple sets of tooling, lowering the test cost, ensuring that the cell is always clamped on both sides during the extrusion test, reducing the risk of bending, and improving the reliability of the test results.

[0021] (2) By providing a first chute with a T-shaped structure on the outer side wall of the second plate body, a sliding path can be provided for the movable side plate. At the same time, the first chute with a T-shaped structure can make the outer shape of the movable side plate match that of the first chute, so that the outer side wall of the movable side plate is flush with the outer side wall of the second plate body. In this way, after the movable side plate adjusts its length extending from the second plate body in the first chute, the outer side wall of the movable side plate can contact the side surface of the cell in the thickness direction at the upper end of the second plate body, and together with the second plate body, clamp the side surface of the longer-sized cell, enabling there to be a sufficient clamping basis for the side surface in the length direction of the cell and avoiding bending during the extrusion process in the length direction of the cell.

[0022] (3) By providing a first scale line and a second scale line, the installation positions of the fixed side plate and the movable side plate can be quickly adjusted according to the cell size without the need to additionally use a size measurement tool, and the adjustment efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a three-dimensional structural schematic diagram of the cell side extrusion test tooling disclosed by the present utility model;

[0025] Figure 2 is an exploded schematic diagram of the cell side extrusion test tooling disclosed by the present utility model;

[0026] Figure 3 is a three-dimensional structural schematic diagram of the assembly structure of the cell side extrusion test tooling disclosed by the present utility model and the cell;

[0027] Figure 4 is a planar schematic diagram of the assembly structure of the cell side extrusion test tooling disclosed by the present utility model and the cell;

[0028] Figure 5 is Figure 4 a planar cross-sectional view taken along line A-A in

[0029] Reference numerals:

[0030] 1. Baffle; 2. Fixed side plate; 21. First plate body; 22. Second plate body; 3. First fixing structure; 31. Strip hole; 32. First threaded hole; 33. First fastening bolt; 4. Movable side plate; 5. Second fixing structure; 51. Second fastening bolt; 52. Second threaded hole; 221. First chute; 11. First scale line; 41. Second scale line; 12. Second chute; 211. Slide rail; 23. Reinforcing plate; S. Battery cell. Detailed implementation manners

[0031] Next, in combination with the implementation manners of the present utility model, the technical solutions in the implementation manners of the present utility model will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present utility model, rather than all of the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0032] As Figure 1 shown, in combination with Figures 2-5 , the present utility model discloses a side extrusion test tooling for a battery cell, including a baffle 1, a fixed side plate 2 and a movable side plate 4.

[0033] Among them, the baffle 1 provides a basic support for the entire tooling to ensure stability during testing. During actual use, the baffle 1 is horizontally installed on the test workbench, the battery cell S is vertically placed on the surface of the baffle 1, and one end of the battery cell S in the length direction contacts the surface of the baffle 1, and the end of the battery cell S away from the baffle 1 is used as the extrusion test end.

[0034] There are two fixed side plates 2 symmetrically arranged, including a first plate body 21 and a second plate body 22. The second plate body 22 is vertically fixed at one end of the first plate body 21. The first plate body 21 is slidably arranged on the baffle 1 and can horizontally move along the length direction of the baffle 1. The second plate bodies 22 on the two fixed side plates 2 are arranged oppositely and are used for clamping the surfaces of the battery cell S in the thickness direction.

[0035] A first fixing structure 3 is arranged between the first plate body 21 and the baffle 1. Through the first fixing structure 3, the position of the fixed side plate 2 on the baffle 1 can be flexibly adjusted. After the position adjustment is completed, the first fixing structure 3 can be used to keep the relative position of the fixed side plate 2 and the baffle 1 fixed, so as to realize the cooperation of the two second plate bodies 22 to clamp the side surface of the battery cell S in the thickness direction and avoid the battery cell S from being bent during the extrusion test.

[0036] The two fixed side plates 2 can be adjusted in position along the length direction of the baffle 1, so as to adjust the distance between the two fixed side plates 2, so as to adapt to the flexible clamping of the sides of the battery cells S with different thicknesses, and improve the versatility.

[0037] In this embodiment, the second plate body 22 clamps the two side surfaces of the battery cell S placed vertically on the baffle 1 in the thickness direction. Since the length of the second plate body 22 is limited, it can only adapt to the clamping of the side surfaces of the battery cells S with a specific length. When the length dimension of the battery cell S is relatively large, during the extrusion process at the extrusion test end of the battery cell S, the unclamped parts of the two side surfaces of the battery cell S will be bent.

[0038] Therefore, this embodiment also provides a movable side plate 4. The movable side plate 4 is arranged on the second plate body 22 and can be telescoped along the direction perpendicular to the first plate body 21 of the second plate body 22. The movable side plate 4 is used to clamp the surface of the battery cell S in the thickness direction. A second fixing structure 5 is arranged between the movable side plate 4 and the second plate body 22.

[0039] With this setting, according to the length dimension of the battery cell S, the length of the movable side plate 4 extending out of the second plate body 22 is adjusted, and the position of the movable side plate 4 on the second plate body 22 is fixed through the second fixing structure 5, so that the movable side plate 4 can flexibly clamp the battery cells S with different lengths, thereby effectively avoiding the bending problem caused by the unclamped two side surfaces of the battery cell S during the extrusion test and ensuring the accuracy of the test.

[0040] The side surface extrusion test tooling for the battery cell S disclosed by the present utility model can, through the adjustable distance between the fixed side plates 2 and the telescopic adjustment of the movable side plate 4 on the second plate body 22, enable the tooling to adapt to various battery cells S with different thicknesses and lengths, reduce the need for multiple sets of tooling, reduce the test cost, ensure that the battery cell S is always clamped on both side surfaces during the extrusion test, reduce the risk of bending, and improve the reliability of the test results.

[0041] In order to realize the adjustable distance between the two fixed side plates 2, this embodiment shows a preferred structural form of the first fixing structure 3. Specifically, the first fixing structure 3 includes a strip-shaped hole 31, a first threaded hole 32 and a first fastening bolt 33. There are two strip-shaped holes 31 arranged in parallel along the width direction of the baffle 1, and the strip-shaped holes 31 are parallel to the length direction of the baffle 1. A plurality of first threaded holes 32 are arranged at equal intervals along the length direction of the baffle 1, and the first fastening bolt 33 passes through the strip-shaped hole 31 and is connected to the first threaded hole 32.

[0042] The multiple first threaded holes 32 arranged at equal intervals along the length direction of the baffle 1 provide a variety of fixing positions, enabling the user to adjust the position of the first plate body 21 according to actual needs, so as to accurately position the fixed side plate 2 on the baffle 1.

[0043] During the actual operation process, by moving the fixed side plate 2 on the baffle 1, when the fixed side plate 2 moves to a suitable position, at this time, the first threaded hole 32 on the baffle 1 corresponds to the strip hole 31. Pass the first fastening bolt 33 through the strip hole 31 and the first threaded hole 32. At this time, translate the two fixed side plates 2 relatively. After the second plate bodies 22 on the two fixed side plates 2 are in contact with the side surface of the battery cell S, then lock the first fastening bolt 33 and the first threaded hole 32. At this time, the fixed side plate 2 can be firmly fixed to the baffle 1.

[0044] In order to enable the movable side plate 4 to expand and contract on the second plate body 22, in this embodiment, a first sliding groove 221 with a T-shaped structure is opened on the outer side wall of the second plate body 22. The first sliding groove 221 is perpendicular to the first plate body 21. The movable side plate 4 is slidably arranged in the first sliding groove 221, and the outer side wall of the movable side plate 4 is flush with the outer side wall of the second plate body 22. With the above technical solution, the first sliding groove 221 provides a sliding path for the movable side plate 4. At the same time, the first sliding groove 221 with a T-shaped structure can make the outer shape of the movable side plate 4 and the first sliding groove 221 match each other, so that the outer side wall of the movable side plate 4 is flush with the outer side wall of the second plate body 22. In this way, when the movable side plate 4 adjusts the length of its extension from the second plate body 22 in the first sliding groove 221, the outer side wall of the movable side plate 4 can contact the side surface in the thickness direction of the battery cell S at the upper end of the second plate body 22, so as to jointly clamp the side surface of the battery cell S with a longer size with the second plate body 22, so that there is a sufficient clamping basis for the side surface in the length direction of the battery cell S, and the battery cell S is prevented from being bent during the extrusion process in the length direction.

[0045] In order to enable the movable side plate 4 to maintain a fixed position with the second plate body 22 after the telescopic adjustment, this embodiment shows a preferred structural form of the second fixing structure 5. Specifically, the second fixing structure 5 includes a second fastening bolt 51 and a second threaded hole 52. The second threaded holes 52 are equidistantly opened in a plurality along the direction perpendicular to the first plate body 21 on the inner side wall of the second plate body 22. The second threaded holes �2 are communicated with the first sliding groove 221. The second fastening bolt 51 passes through the second threaded hole 52 and abuts against the inner wall of the movable side plate 4.

[0046] With this setting, when the movable side plate 4 adjusts the length of its extension from the second plate body 22, by screwing the second fastening bolt 51 in the second threaded hole 52 towards the first sliding groove 221 direction, the second fastening bolt 51 abuts against the inner wall of the movable side plate 4, so as to realize that the movable side plate 4 and the second plate body 22 maintain a fixed position. Since the movable side plate 4 needs to adjust its telescopic amount, a plurality of second threaded holes 52 are provided on the side wall of the second plate body 22. After the movable side plate 4 flexibly adjusts its extension length, the second threaded holes 52 on the second plate body 22 can correspond to the movable side plate 4, so as to effectively fix the position of the movable side plate 4 after the position adjustment on the second plate body 22.

[0047] In some preferred embodiments, a plurality of first scale lines 11 are equidistantly arranged along the length direction of the side wall of the baffle 1. Specifically, the extrusion tooling in this embodiment is installed on an extrusion test device, and the pressure head is located directly above the baffle 1. The zero line of the first scale line 11 corresponds to the central axis position of the pressure head.

[0048] After the two fixed side plates 2 of this embodiment are closed, they can just correspond to the zero line of the first scale line 11. When the thickness of the battery cell S is known, the fixed side plate 2 can be directly adjusted, and the indication can be made through the first scale line 11, so that the position of the fixed side plate 2 on the baffle 1 can be quickly adjusted. When the positions of the two fixed side plates 2 are adjusted, the battery cell S can be easily inserted between the two fixed side plates 2. At this time, the center of the battery cell S just aligns with the zero position of the first scale line 11. The center of the battery cell S corresponds to the central axis of the pressure head, ensuring that the pressure is at the center of the end face of the battery cell S during the extrusion process and avoiding deviation.

[0049] In some preferred embodiments, a plurality of second scale lines 41 are equidistantly arranged along the length direction of the side wall of the movable side plate 4. When the length of the battery cell S is known and the length dimension of the second plate body 22 is known, by subtracting the length of the second plate body 22 from the total length of the battery cell S, the length that the movable side plate 4 needs to extend can be known. At this time, during the extension of the movable side plate 4, the extension amount of the movable side plate 4 can be easily adjusted by observing the second scale line 41 without using additional dimensional measurement tools.

[0050] In order to make the fixed side plate 2 move smoothly on the baffle 1, a second chute 12 is arranged on the surface of the baffle 1 along its length, and a slide rail 211 that is slidably connected to the second chute 12 is arranged on the bottom surface of the first plate body 21. With this setting, during the horizontal movement of the fixed side plate 2, the slide rail 211 can slide along the second chute 12 to play a guiding role. At the same time, the second chute 12 is arranged on the surface of the baffle 1, which does not affect the placement of the battery cell S on the surface of the baffle 1.

[0051] Preferably, the fixed side plate 2 further includes a reinforcing plate 23, and the reinforcing plate 23 is fixedly arranged between the first plate body 21 and the second plate body 22. Through the setting of the reinforcing plate 23, the structural strength of the fixed side plate 2 can be improved.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A side extrusion test tooling for an electric core, characterized in that, Including: A baffle (1) for contacting one end of the battery cell (S) in the length direction; Two fixed side plates (2) are symmetrically arranged, including a first plate body (21) and a second plate body (22). The second plate body (22) is vertically fixed at one end of the first plate body (21). The first plate body (21) is slidably arranged on the baffle (1) and can horizontally move along the length direction of the baffle (1). A first fixing structure (3) is arranged between the first plate body (21) and the baffle (1). The second plate bodies (22) on the two fixed side plates (2) are arranged oppositely for clamping the surfaces of the battery cell (S) in the thickness direction; A movable side plate (4) is arranged on the second plate body (22) and can expand and contract along the direction perpendicular to the first plate body (21) of the second plate body (22). The movable side plate (4) is used for clamping the surfaces of the battery cell (S) in the thickness direction. A second fixing structure (5) is arranged between the movable side plate (4) and the second plate body (22).

2. The side extrusion test tooling for the battery cell according to claim 1, wherein: The first fixing structure (3) includes a strip-shaped hole (31), a first threaded hole (32) and a first fastening bolt (33). Two strip-shaped holes (31) are arranged in parallel along the width direction of the baffle (1), and the strip-shaped holes (31) are parallel to the length direction of the baffle (1). A plurality of first threaded holes (32) are arranged at equal intervals along the length direction of the baffle (1). The first fastening bolt (33) passes through the strip-shaped hole (31) and is connected to the first threaded hole (32).

3. The side extrusion test tooling for the battery cell as described in claim 1, wherein: A first chute (221) with a T-shaped structure is formed on the outer side wall of the second plate body (22). The first chute (221) is perpendicular to the first plate body (21). The movable side plate (4) is slidably arranged in the first chute (221), and the outer side wall of the movable side plate (4) is flush with the outer side wall of the second plate body (22).

4. The side extrusion test tooling for the battery cell according to claim 3, wherein: The second fixing structure (5) includes a second fastening bolt (51) and a second threaded hole (52). A plurality of second threaded holes (52) are arranged at equal intervals along the direction perpendicular to the first plate body (21) on the inner side wall of the second plate body (22). The second threaded holes (52) communicate with the first chute (221). The second fastening bolt (51) passes through the second threaded hole (52) and abuts against the inner wall of the movable side plate (4).

5. The side extrusion test tooling for the battery cell according to claim 1, wherein: A plurality of first scale lines (11) are arranged at equal intervals along the length direction of the side wall of the baffle (1).

6. The side extrusion test tooling for the battery cell according to claim 1 or 3, characterized in that: A plurality of second scale lines (41) are arranged at equal intervals along the length direction of the side wall of the movable side plate (4).

7. The cell side extrusion test tooling according to claim 2, wherein: A second chute (12) is arranged on the surface of the baffle (1) along its length. A slide rail (211) slidably connected to the second chute (12) is arranged on the bottom surface of the first plate body (21).

8. The cell side extrusion test tooling according to claim 1, wherein: The fixed side plate (2) further includes a reinforcing plate (23), and the reinforcing plate (23) is fixedly arranged between the first plate body (21) and the second plate body (22).

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