Pressing arm structure of air tightness test tool for battery pack shell

Abstract

The utility model relates to the technical field of battery pack tools, in particular to a pressing arm structure of a battery pack shell airtight test tool, which comprises two parallel longitudinal arms, a cross beam is arranged at the bottom between the two longitudinal arms, and two ends of each longitudinal arm are respectively provided with a crimping adjusting part. And the crimping adjusting part is used for positioning the whole pressing arm structure and carrying out adaptive adjustment. The longitudinal arm is matched with the cross beam to compress the battery pack, so that the test tool can well simulate the real use environment of the battery pack, and the test accuracy and the qualified rate are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack tooling, and in particular to a pressure arm structure of a battery pack shell airtightness test tooling. Background Art

[0002] By testing the sealing performance of the battery pack, it is possible to detect whether there is gas leakage in the battery pack. This test is essential to ensure that the battery pack can maintain the integrity and stability of its internal structure when working, so as to avoid the battery pack from leaking or water ingress, which may cause the battery performance to deteriorate, the battery life to be shortened, and potential safety hazards. In the airtightness test, the test tooling plays a pivotal role. It can not only position the battery pack, but also ensure the safety of the test process and the accuracy of the test results. The Chinese patent application with publication number CN218496336U discloses a battery pack upper end cover shell airtightness detection tooling, which is provided on the workbench by a clamping device and a frame-type integral pressure strip is provided on the top surface around it, and the pressure strip is pressed by the clamping device, so as to achieve the clamping in the battery pack test. Although the frame-type integral pressure strip is provided to cooperate with the sealing strip to realize the crimping and sealing of the shell, there is no situation where there is no component above to block the pressure during the actual use of the battery pack, and the patent scheme can only crimp the frame around the battery pack. However, the overall upper surface of the battery pack cannot simulate the use environment of the battery pack well, resulting in distortion of the test results and affecting the product qualification rate. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a pressure arm structure for a battery pack shell airtightness test tooling in response to the above-mentioned technical deficiencies. The battery pack is pressed by a longitudinal arm in cooperation with a crossbeam, thereby solving the problem that the overall upper surface of the battery pack cannot simulate the use environment of the battery pack well, causing distortion of the test results and affecting the product qualification rate.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pressure arm structure of a battery pack shell airtightness test tooling, including two longitudinal arms arranged in parallel, a cross beam is provided at the bottom between the two longitudinal arms, and a crimping adjustment part is provided at both ends of each longitudinal arm, and the crimping adjustment part is used for positioning the overall pressure arm structure and performing adaptive adjustment.

[0005] To further optimize the technical solution, the crimping adjustment part includes a push rod, a pull rod and a screw rod. The top of the push rod and the pull rod are respectively threadedly connected to one end of the screw rod. Long holes are respectively provided at both ends of the longitudinal arm. The screw rod is passed through the long holes. A butterfly nut is threadedly connected to the top end of the screw rod. A cantilever is provided at the end of the pull rod away from the screw rod.

[0006] To further optimize the technical solution, a pressure plate is provided at the bottom of the crossbeam, and a buffer layer is provided at the bottom of the pressure plate.

[0007] To further optimize the technical solution, the tops of both ends of the cross beam are welded and fixed to the bottom of the longitudinal arm.

[0008] To further optimize the technical solution, the longitudinal arms at both ends of the crossbeam are detachably connected by bolts.

[0009] To further optimize the technical solution, a reinforcing arm is provided at the upper portion of the longitudinal arm along the length direction, and a handle is provided at the upper middle portion of the reinforcing arm.

[0010] To further optimize the technical solution, a dovetail track is provided at the bottom of the longitudinal arm along the length direction, and dovetail grooves are provided at both ends of the top of the crossbeam. The dovetail track is slidably connected in the dovetail groove, and a locking bolt is provided on one side of the dovetail track, and the locking bolt is connected between the crossbeam and the longitudinal arm.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The battery pack is pressed by the longitudinal arm and the crossbeam, so that the test fixture can well simulate the real use environment of the battery pack and improve the test accuracy and pass rate;

[0013] 2. The crimping adjustment part can well position the crimping arm structure to avoid damage to the battery pack caused by overpressure;

[0014] 3. The distance between multiple beams can be conveniently adjusted by cooperating with the dovetail track and the dovetail grooves at both ends of the beam to ensure that the beams move parallel to each other, thus avoiding the distortion of the test results caused by the tilting and sliding of one end of the beam during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external structure of a first embodiment of a pressure arm structure of a battery pack shell airtightness test tool;

[0016] Figure 2 It is a side view of a first embodiment of a pressure arm structure of a battery pack shell airtightness test tool;

[0017] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0018] Figure 4 This is an exploded schematic diagram of a second embodiment of a pressure arm structure of a battery pack shell airtightness test tool.

[0019] In the figure: 1. longitudinal arm; 10. dovetail track; 11. reinforcing arm; 12. handle; 13. long hole; 14. locking bolt; 2. cross beam; 21. pressure plate; 22. buffer layer; 23. dovetail groove; 3. push rod; 4. pull rod; 41. cantilever; 5. screw; 6. table; 7. battery pack. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the reference drawings of specific embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0021] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in this application document to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Embodiment 1

[0022] Combination Figures 1 to 3 As shown, a pressure arm structure of a battery pack shell airtightness test tool includes two longitudinal arms 1 and multiple cross beams 2. The two longitudinal arms 1 are arranged parallel to each other, and a cross beam 2 is provided at the bottom between the two longitudinal arms 1. The tops of both ends of the cross beam 2 are welded and fixed to the bottom of the longitudinal arms 1, and can also be detachably connected by bolts.

[0023] A reinforcing arm 11 is provided at the upper part of the longitudinal arm 1 along the length direction, and a handle 12 is provided at the upper middle side of the reinforcing arm 11. A crimping adjustment part is provided at both ends of each longitudinal arm 1, and the crimping adjustment part includes a push rod 3, a pull rod 4 and a screw rod 5. The tops of the push rod 3 and the pull rod 4 are respectively threadedly connected with one end of the screw rod 5. Long holes 13 are provided at both ends of the longitudinal arm 1, and the screw rod 5 is inserted into the long hole 13. A butterfly nut is threadedly connected to one end of the top of the screw rod 5. A cantilever 41 is provided at one end of the pull rod 4 away from the screw rod 5. Figure 3 As shown, a pressing plate 21 is provided at the bottom of the cross beam 2, and a buffer layer 22 is provided at the bottom of the pressing plate 21. The longitudinal arm 1 and the cross beam 2 are made of aluminum profiles, and the buffer layer 22 is made of nylon plate.

[0024] When using, combine Figures 1 to 3As shown, the battery pack 7 to be tested is placed on the table 6. The handle 12 can be used to take the integral pressure arm structure. After the integral pressure arm structure is placed on the upper part of the battery pack 7, the top rods 3 at both ends of the longitudinal arm 1 are adjusted first, so that the bottom step of the top rod 3 abuts against the upper surface of the table 6. The distance between the pressure plate 21 and the table 6 can be fixed to avoid damage to the battery pack 7 caused by excessive pressure. The crimping adjustment part is used to position the integral pressure arm structure and make adaptive adjustments. The cantilever 41 at the bottom of the pull rod 4 is clamped to the bottom of the table 6. The pull rod 4 is tightened by adjusting the butterfly nut at the top of the pull rod 4, thereby ensuring the reliable fixation of the longitudinal arm 1. After the adjustment and fixation are completed, the airtightness test of the battery pack 7 can be started. The pressure arm structure can reduce the deformation of the large surface of the product, increase the rigidity of the product, reduce the stress concentration of the product, avoid cracking, and improve the qualified rate. Embodiment 2

[0025] Combination Figure 4 As shown, a pressure arm structure of a battery pack shell airtightness test tooling is different from the first embodiment in that a dovetail track 10 is provided at the bottom of the longitudinal arm 1 along the length direction, and dovetail grooves 23 are respectively provided at the two ends of the top of the crossbeam 2. The dovetail track 10 is slidably connected in the dovetail groove 23, and a locking bolt 14 is provided on one side of the dovetail track 10, and the locking bolt 14 is connected between the crossbeam 2 and the longitudinal arm 1.

[0026] When using, combine Figure 4 As shown, the distance between multiple beams 2 can be conveniently adjusted by cooperating with the dovetail track 10 and the dovetail grooves 23 at both ends of the beam 2, ensuring that the beams 2 move parallel to each other, thereby avoiding distortion of the test result caused by tilting and sliding of one end of the beam 2 during the test.

[0027] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or within the equivalent forms of such scope and boundaries.

Claims

1. A pressure arm structure of a battery pack shell airtightness test tool, characterized in that: It comprises two longitudinal arms (1) arranged in parallel, a crossbeam (2) is arranged at the bottom between the two longitudinal arms (1), and crimping adjustment parts are respectively arranged at both ends of each longitudinal arm (1), and the crimping adjustment parts are used for positioning the overall crimping arm structure and performing adaptive adjustment.

2. The pressure arm structure of the battery pack shell airtightness test tool according to claim 1, characterized in that: The crimping adjustment part includes a push rod (3), a pull rod (4) and a screw rod (5), the top of the push rod (3) and the top of the pull rod (4) are respectively threadedly connected to one end of the screw rod (5), and the two ends of the longitudinal arm (1) are respectively provided with long holes (13), the screw rod (5) is inserted into the long holes (13), the top end of the screw rod (5) is threadedly connected to a butterfly nut, and the end of the pull rod (4) away from the screw rod (5) is provided with a cantilever (41).

3. The pressure arm structure of the battery pack shell airtightness test tool according to claim 1, characterized in that: A pressing plate (21) is provided at the bottom of the crossbeam (2), and a buffer layer (22) is provided at the bottom of the pressing plate (21).

4. The pressure arm structure of the battery pack shell airtightness test tool according to claim 1, characterized in that: The tops of both ends of the cross beam (2) are welded and fixed to the bottom of the longitudinal arm (1).

5. The pressure arm structure of the battery pack shell airtightness test tool according to claim 1, characterized in that: The longitudinal arms (1) at both ends of the cross beam (2) are detachably connected by bolts.

6. The pressure arm structure of the battery pack shell airtightness test tool according to claim 1, characterized in that: A reinforcing arm (11) is provided at the upper portion of the longitudinal arm (1) along the length direction, and a handle (12) is provided at the upper middle portion of the reinforcing arm (11).

7. The pressure arm structure of the battery pack shell airtightness test tool according to claim 1, characterized in that: A dovetail track (10) is provided at the bottom of the longitudinal arm (1) along the length direction, and dovetail grooves (23) are provided at both ends of the top of the cross beam (2), and the dovetail track (10) is slidably connected in the dovetail grooves (23). A locking bolt (14) is provided on one side of the dovetail track (10), and the locking bolt (14) is connected between the cross beam (2) and the longitudinal arm (1).

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