Compression tool for air tightness test of battery pack

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a battery pack airtight test pressing tool which comprises a pressing tool cross beam, a pressing tool supporting arm, a pressing tool small arm and a pressing tool lead screw, and a battery pack silica gel pressing plate is arranged below the middle of the pressing tool cross beam. The pressing tool supporting arms are adjustably installed on the two sides of the pressing tool cross beam respectively, the pressing tool small arms are adjustably installed at the lower ends of the pressing tool supporting arms respectively, and the pressing tool small arms are in threaded connection with pressing tool lead screws. The device is simple in structure, convenient to operate, adjustable in overall structure, suitable for battery packs of different models and high in compatibility, the labor intensity is relieved, the manufacturing cost waste of a new tool is reduced, and meanwhile the accuracy of a test result is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium-ion batteries, and in particular relates to a battery pack airtightness test and compression tool. Background Art

[0002] As society progresses, people's concern for environmental protection continues to grow. Traditional cars are known for their significant environmental pollution, leading to the shift to new energy vehicles (NEVs). Battery packs are the primary source of power for NEVs, and their sealing performance is crucial to driving safety. Therefore, airtightness testing of battery packs is essential during the production process to prevent short circuits caused by water seepage.

[0003] At present, the air tightness test of battery packs generally adopts the positive pressure method, that is, the battery pack is inflated from the pressure relief valve for testing. In order to increase the energy density of the battery pack, manufacturers usually use a top cover made of lighter material. However, when the top cover is inflated, it will easily bulge and deform, resulting in inaccurate test results. For this reason, it is common for manufacturers to not test the top cover tightly, resulting in inaccurate test results. Some manufacturers use tooling for tightening the top cover, but the tooling is relatively large and complex in structure. It is cumbersome to install and remove the tooling, which increases the labor intensity of the workers. Utility Model Content

[0004] The purpose of the utility model is to provide a battery pack airtight test pressing tool to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a battery pack airtight test clamping tool, comprising a clamping tool crossbeam, a clamping tool support arm, a clamping tool small arm and a clamping tool screw, wherein the battery pack silicone pressure plate is provided below the middle of the clamping tool crossbeam, the clamping tool support arms are adjustably installed on both sides of the clamping tool crossbeam, the clamping tool small arms are adjustably installed at the lower ends of each clamping tool support arms, and the clamping tool small arms are threadedly connected to the clamping tool screw.

[0006] Preferably, a spirit level is installed on the side of the clamping tool beam.

[0007] Preferably, inner limit screws and edge limit screws are installed at both ends of the clamping tool beam.

[0008] Preferably, a portable handle is fixed to the upper portion of the pressing tool.

[0009] Preferably, the upper end of the pressing tool support arm is slidably connected to the pressing tool crossbeam through a sleeve and fastened together by a fixing screw.

[0010] Preferably, the pressing tool support arm is provided with a scale.

[0011] Preferably, the clamping tool arm consists of an upper arm and a lower arm. The upper arm is provided with an adjustment slot, and the lower arm is provided with a bolt hole. The upper arm and the lower arm are fixed together by bolts and nuts.

[0012] Preferably, one end of the compacting tool arm is slidably connected to the compacting tool support arm through a sleeve and is locked by a small arm fixing screw.

[0013] Preferably, a floating top block is installed on the upper end of the pressing tool screw.

[0014] Preferably, a wrench is fixed to the lower end of the pressing tool screw.

[0015] The beneficial effects of the present invention are: the present invention has a simple structure, convenient operation, an adjustable overall structure, is suitable for battery packs of different models, has high compatibility, reduces labor intensity, reduces the waste of production costs of new product tooling, and increases the accuracy of test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of this embodiment;

[0017] Figure 2 This is a schematic diagram of the connection between the pressing tool support arm and the pressing tool small arm in this embodiment;

[0018] Figure 3 This is a schematic diagram of the connection between the pressing tool support arm and the pressing tool arm in another direction in this embodiment;

[0019] Figure 4 This is an exploded view of the pressing tool screw in this embodiment;

[0020] Figure 5 2 is a cross-sectional view of the pressing tool screw in this embodiment;

[0021] Figure 6 This is a usage state diagram of this embodiment;

[0022] Explanation of the accompanying reference numerals: 1. Battery pack; 2. Workbench; 31. Clamping tool beam; 32. Clamping tool support arm; 321. Scale; 33. Clamping tool forearm; 331. Adjustment slot; 332. Bolt hole; 34. Clamping tool lead screw; 341. Floating top block; 342. Ball head; 343. Bolt; 344. Wrench; 35. Portable handle; 36. Level; 37. Battery pack silicone pressure plate; 38. Internal limit screw; 39. Fixing screw; 310. Edge limit screw; 311. Support arm limit screw; 312. Forearm fixing screw. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixedly connected," and "fixed connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0027] like Figure 1-Figure 3 As shown, a battery pack airtight test clamping tool includes a clamping tool beam 31, a clamping tool support arm 32, a clamping tool arm 33, a clamping tool screw 34, a portable handle 35, a spirit level 36, a battery pack silicone pressure plate 37, an internal limit screw 38, a fixing screw 39, an edge limit screw 310, a support arm limit screw 311 and a small arm fixing screw 312.

[0028] Among them, the battery pack silicone pressure plate 37 is provided at the lower middle part of the clamping tooling beam 31, and the clamping tooling support arms 32 are adjustably installed on both sides of the clamping tooling beam 31, and the clamping tooling small arms 33 are adjustably installed at the lower ends of each clamping tooling support arms 32, and the clamping tooling small arms 33 are threadedly connected to the clamping tooling screw 34.

[0029] Specifically, the level 36 is mounted on the side of the clamping fixture's crossbeam. Internal limit screws 38 and edge limit screws 310 are installed at both ends of the clamping fixture's crossbeam. The lower end of the clamping fixture's support arm is provided with a support arm limit screw 311. Limit screws are located throughout the fixture's straight rods, preventing the fixture from falling out during use and reducing workload. A portable handle 35 is secured to the top of the clamping fixture for easy handling or lifting.

[0030] Specifically, the upper end of the clamping fixture support arm 32 is slidably connected to the clamping fixture crossbeam through a sleeve and fastened together by a fixing screw 39. The clamping fixture support arm is provided with a scale 321. Adjusting the clamping fixture arm 33 can level the two sides and cooperate with the level 36 to ensure that the battery pack silicone pressure plate 37 can be fully pressed against the battery pack 1.

[0031] One end of the clamping tool arm 33 is slidably connected to the clamping tool support arm via a sleeve and locked with an arm fixing screw 312. The clamping tool arm is retractable, compatible with different types of workbenches, and avoids unfixable positions at the bottom of the workbench. The clamping tool arm consists of an upper arm and a lower arm. The upper arm has an adjustment slot 331, and the lower arm has a bolt hole 332. The upper and lower arms are fixed together by bolts and nuts.

[0032] Specifically, a floating top block 341 is mounted on the upper end of the compression tooling screw. This floating top block is connected to a ball head 342 on the compression tooling screw, allowing for self-leveling if the bottom of the trolley is uneven. A wrench 344 is fixed to the lower end of the compression tooling screw via a bolt 343. Without compromising screw installation, a larger wrench 344 can be used to increase torque and reduce labor intensity.

[0033] During use, the battery pack 1 arrives at the airtightness test station along with the workbench 2. The operator then takes the portable handle 35, opens the clamping tool support arms 32 at both ends, adjusts the clamping arm 33 to the appropriate position, and then places it on the battery pack 1. The clamping tool support arms 32 are then adjusted left and right to the appropriate position, the fixing bolts 39 are tightened, and the clamping tool lead screw 34 on the clamping tool arm 33 can be against the lower side of the workbench 2. The clamping tool arm 33 is then adjusted up and down to the appropriate position, and the arm fixing screw 312 is fixed. The operator then turns the lever 344 to raise the lead screw and press against the workbench, thereby pressing the battery pack silicone pressure plate 37 against the battery pack 1. The level of the spirit level 36 is observed. If the tool support arm 32 is not adjusted horizontally, the installation process is complete. The upper cover is pressed by the battery pack silicone pressure plate, and then an airtightness test is performed. After the airtightness test is completed, the tool can be removed by following the reverse operation. This utility model allows for flexible adjustment of both horizontal and vertical dimensions, ensuring compatibility with all battery pack sizes. The screws and bolt holes securely fit together for easy operation. This simple installation prevents inaccuracies caused by bulging of the battery pack cover during airtightness testing, ensuring effective and accurate battery pack airtightness testing.

[0034] It should be pointed out that a number of improvements and modifications may be made without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A battery pack airtightness test and compression tool, characterized by: It includes a clamping tooling beam, a clamping tooling support arm, a clamping tooling small arm and a clamping tooling screw. The battery pack silicone pressure plate is provided below the middle of the clamping tooling beam. The clamping tooling support arms are adjustably installed on both sides of the clamping tooling beam. The clamping tooling small arms are adjustably installed on the lower ends of each clamping tooling support arm. The clamping tooling small arms are threadedly connected to the clamping tooling screw.

2. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: A level is installed on the side of the pressing tool beam.

3. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: Internal limiting screws and edge limiting screws are installed at both ends of the clamping tool beam.

4. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: A portable handle is fixed on the upper part of the pressing tool.

5. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: The upper end of the pressing tool support arm is slidably connected to the pressing tool crossbeam through a sleeve and fastened together by a fixing screw.

6. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: The pressing tool support arm is provided with a scale.

7. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: The clamping tool arm consists of an upper arm and a lower arm. The upper arm is provided with an adjustment slot, and the lower arm is provided with a bolt hole. The upper arm and the lower arm are fixed together by bolts and nuts.

8. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: One end of the pressing tool arm is slidably connected to the pressing tool support arm through a sleeve and is locked by a small arm fixing screw.

9. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: A floating top block is installed on the upper end of the pressing tool screw.

10. The battery pack airtightness test and pressing tool according to claim 1, characterized in that: A wrench is fixed to the lower end of the pressing tool screw.

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