Battery pack airtightness test tool

Abstract

The utility model provides a battery pack airtightness test tool, and relates to the technical field of batteries. The battery pack airtightness test tool comprises a pressing plate which is used for pressing and covering an upper cover of a battery pack; the connecting frames are arranged on the two opposite sides of the pressing plate, the connecting frames are hinged to the pressing plate, and the connecting frames extend to the battery pack framework; and the fixing assembly is arranged on the connecting frame and is used for being connected with the battery pack framework so as to fix the connecting frame. According to the air tightness test tool for the battery pack, the upper cover is supported through the pressing plate, the bulging condition of the battery pack in the inflation test process is reduced, and the accuracy of air tightness test data is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack airtightness testing tool. Background Art

[0002] Considering the insulation risks such as condensation and water immersion, the energy storage battery pack needs to meet certain sealing level requirements, so it is necessary to conduct airtightness testing. According to the Bo-Mars law: (P: test pressure, V: effective volume inside the pack, n: number of moles of gas, R: air constant, T: gas temperature). Changes in the effective volume inside the battery pack will cause changes in air pressure, thereby affecting the accuracy of the measurement. Therefore, in order to effectively control the validity of the airtightness test data, it is necessary to control the constancy of the effective volume inside the battery pack.

[0003] In the past, energy storage battery pack covers were typically made of sheet metal, which offered a simple design and a short processing cycle. However, as energy storage systems placed higher demands on component costs, battery pack covers have gradually transitioned from sheet metal to plastic.

[0004] However, the plastic top cover has relatively poor rigidity. During the battery pack inflation process, the top cover will bulge significantly, causing the internal effective volume to change, ultimately leading to inaccurate airtightness test data and making it difficult to judge the effectiveness of the seal. Utility Model Content

[0005] The present application provides a battery pack airtightness test tool to solve the problem that the plastic upper cover has relatively poor rigidity, the upper cover of the battery pack will bulge significantly during the inflation process, and the internal effective volume will change, which ultimately leads to inaccurate airtightness test data and difficulty in judging the effectiveness of the seal.

[0006] The present application provides a battery pack airtightness test fixture, comprising a pressing plate, the pressing plate being used to press onto an upper cover of the battery pack;

[0007] A connecting frame is provided on two opposite sides of the pressing plate, the connecting frame is hinged to the pressing plate, and the connecting frame extends to the battery pack frame;

[0008] A fixing assembly is provided on the connecting frame, and the fixing assembly is used to be connected to the battery pack skeleton to fix the connecting frame.

[0009] In some embodiments, the fixing assembly includes a mounting seat, a fixing hook and a first adjustment member. The mounting seat is arranged on the connecting frame, the first adjustment member is arranged on the mounting seat and connected to the fixing hook, and the first adjustment member is used to adjust the position of the fixing hook so that the fixing hook is hooked on the fixing hole on the battery pack frame.

[0010] In some embodiments, the first adjustment member includes an adjustment handle, a connecting rod and a connecting belt. An adjustment hole is opened on the mounting seat, and the connecting belt is slidably inserted into the adjustment hole. The fixed hook is connected to one end of the connecting belt, and the other end of the connecting belt is connected to the connecting rod. The adjustment handle is rotatably set on the mounting seat, and the connecting rod is hinged on the adjustment handle. The hinge axis of the connecting rod is separated from the rotation axis of the adjustment handle, so that the adjustment handle drives the connecting rod to move.

[0011] In some embodiments, the distance from the rotation axis of the adjustment handle to the fixing hook is smaller than the distance from the hinge axis of the connecting rod to the fixing hook.

[0012] In some embodiments, a hinge shaft is rotatably provided on the adjustment handle, the connecting rod is slidably provided on the hinge shaft, two limit blocks are provided on the connecting rod, and the hinge shaft is located between the two limit blocks.

[0013] In some embodiments, connecting frames are hingedly provided on four circumferential sides of the pressure plate.

[0014] In some embodiments, the battery pack airtightness test tool also includes a reinforcement assembly, which includes a mounting rod, a reinforcement rod and a second adjustment member. The mounting rod is arranged on the connecting frame, and the second adjustment member is arranged on the mounting rod and connected to the reinforcement rod to drive the reinforcement rod to move toward the side wall of the battery pack so that the reinforcement rod abuts against the side wall of the battery pack.

[0015] In some embodiments, the second adjusting member includes a screw rod, a connecting seat and a threaded seat, the connecting seat is arranged on the reinforcement rod, the threaded seat is arranged on the mounting rod, the screw rod is threaded through the threaded seat and is rotatably connected to the connecting seat.

[0016] In some embodiments, a reinforcement frame is provided on the pressure plate, and the connecting frame is hinged to the reinforcement frame.

[0017] In some embodiments, the reinforcement frame is provided with lifting ears.

[0018] The present application provides a battery pack airtightness test tool, which places a pressure plate on the upper cover of the battery pack and abuts the upper cover of the battery pack, and then extends the connecting frames on both sides of the pressure plate to the frame of the battery pack by rotating the connecting frames, and fixes the connecting frames to the battery pack frame through the fixing components to achieve the connection between the connecting frames and the battery pack frame, and then fixes the pressure plate to the battery pack; through the abutment between the pressure plate and the upper cover of the battery pack, the bulging deformation of the plastic upper cover of the battery pack is reduced, and the stability of the effective volume of the battery pack during the airtightness test is improved, thereby improving the accuracy of the airtightness test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of the battery pack airtightness test tooling provided in an embodiment of the present application;

[0022] Figure 3 for Figure 2 A magnified schematic diagram of the local structure in FIG;

[0023] Figure 4 for Figure 1 Schematic diagram of the structure of the fixed components.

[0024] Description of reference numerals:

[0025] 1. Upper cover; 2. Frame; 3. Fixing holes;

[0026] 100, pressing plate;

[0027] 200, connecting frame;

[0028] 300, fixing assembly; 310, mounting seat; 311, adjustment hole; 320, fixing hook; 330, first adjustment member; 331, adjustment handle; 332, connecting rod; 333, connecting belt; 334, hinge shaft; 335, limit block;

[0029] 400, reinforcement assembly; 410, mounting rod; 420, reinforcement rod; 430, second adjustment member; 431, screw; 432, connecting seat; 433, threaded seat;

[0030] 500, reinforcement frame; 510, lifting lug.

[0031] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0033] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise specified or limited, the terms "installed," "connected," "fixed," and the like should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] Considering insulation risks such as condensation and water immersion, energy storage battery packs need to meet IP6X sealing requirements (dust protection level IP6X: prevent harmful dust accumulation). Therefore, they need to be tested for airtightness. According to the Bo-Mars law: (P: test pressure, V: effective volume inside the pack, n: number of moles of gas, R: air constant, T: gas temperature). Changes in the effective volume inside the battery pack will cause changes in air pressure, thereby affecting the accuracy of the measurement. Therefore, in order to effectively control the validity of the airtightness test data, it is necessary to control the constancy of the effective volume inside the battery pack.

[0037] In early energy storage projects, battery pack covers were typically constructed of sheet metal, driven by delivery time and design convenience. This simplified the design and shortened the processing cycle. As energy storage systems placed higher demands on component costs, the battery pack cover gradually transitioned from sheet metal to plastic. Sheet metal covers offer relatively good rigidity, allowing minimal deformation during battery pack inflation, which has minimal impact on airtightness test data.

[0038] However, the plastic top cover has relatively poor rigidity. During the battery pack inflation process, the top cover will bulge significantly, causing the internal effective volume to change, ultimately leading to inaccurate airtightness test data and making it difficult to judge the effectiveness of the seal.

[0039] In order to solve the above problems, the present application provides a battery pack airtightness test tool, which is implemented by placing a pressure plate on the upper cover of the battery pack and abutting it against the upper cover of the battery pack, and then rotating the connecting frames on both sides of the pressure plate to extend to the frame of the battery pack, and fixing the connecting frames to the battery pack frame through a fixing assembly to achieve the connection between the connecting frames and the battery pack frame, and then fixing the pressure plate to the battery pack; through the abutment between the pressure plate and the upper cover of the battery pack, the bulging deformation of the plastic upper cover of the battery pack is reduced, and the stability of the effective volume of the battery pack during the airtightness test is improved, thereby improving the accuracy of the airtightness test data.

[0040] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0041] This application provides a battery pack airtightness test tool, referring to Figures 1 to 4 The battery pack airtightness test fixture includes a pressing plate 100, which is used to press on the upper cover 1 of the battery pack.

[0042] The connecting frame 200 is arranged on two opposite sides of the pressing plate 100. The connecting frame 200 is hinged to the pressing plate 100 and extends to the battery pack frame 2.

[0043] The fixing assembly 300 is disposed on the connecting frame 200 . The fixing assembly 300 is used to connect to the battery pack frame 2 to fix the connecting frame 200 .

[0044] Among them, reference Figure 1 The battery pack includes an upper cover 1 and a frame 2. The upper cover 1 is connected to the frame 2, and a fixing hole 3 is opened on the side of the frame 2.

[0045] The connecting frame 200 is hinged to the side of the pressure plate 100. Rotating the connecting frame 200 positions it perpendicular to the pressure plate 100. The connecting frame 200 is located on the side of the battery pack cover 1 and extends to the frame 2 at the bottom of the battery pack. Multiple fixing assemblies 300 are provided. These fixing assemblies 300 secure the connecting frames 200 on both sides of the pressure plate 100 to the frame 2 of the battery pack, thereby securing the pressure plate 100 to the battery pack and reinforcing the battery pack cover 1.

[0046] For example, two fixing assemblies 300 are provided on the connecting frame 200 on the same side of the pressing plate 100. In other embodiments, different numbers of fixing assemblies 300 may be provided according to actual needs, which will not be described in detail here.

[0047] By adopting the above technical solution, the pressing plate 100 is placed on the upper cover 1 of the battery pack and abutted against the upper cover 1 of the battery pack, and then the connecting frames 200 on both sides of the pressing plate 100 are extended to the frame 2 of the battery pack by rotating the connecting frames 200, and the fixing components 300 are used to fix the connecting frames 200 on the battery pack frame 2 to achieve the connection between the connecting frames 200 and the battery pack frame 2, and then the pressing plate 100 is fixed to the battery pack; by the abutment of the pressing plate 100 with the upper cover 1 of the battery pack, the bulging and deformation of the plastic upper cover 1 of the battery pack is reduced, and the stability of the effective volume of the battery pack during the airtightness test is improved, thereby improving the accuracy of the airtightness test data.

[0048] In some embodiments, reference Figure 3 and Figure 4 The fixing assembly 300 includes a mounting seat 310, a fixing hook 320 and a first adjusting member 330. The mounting seat 310 is set on the connecting frame 200. The first adjusting member 330 is set on the mounting seat 310 and is connected to the fixing hook 320. The first adjusting member 330 is used to adjust the position of the fixing hook 320 so that the fixing hook 320 is hung on the fixing hole 3 on the battery pack frame 2.

[0049] The battery pack frame 2 is provided with fixing holes 3 for the fixing hooks 320 to be hooked therein. The number of fixing holes 3 matches the number of fixing assemblies 300. The frame 2 at the bottom of the battery pack is a steel frame structure, so it can withstand the corresponding tensile force.

[0050] For example, refer to Figure 3 and Figure 4The first adjusting member 330 includes an adjusting handle 331, a connecting rod 332 and a connecting belt 333. An adjusting hole 311 is opened on the mounting base 310. The connecting belt 333 is slidably passed through the adjusting hole 311. The fixing hook 320 is connected to one end of the connecting belt 333. The other end of the connecting belt 333 is connected to the connecting rod 332. The adjusting handle 331 is rotatably set on the mounting base 310. The connecting rod 332 is hinged on the adjusting handle 331. The hinge axis 334 of the connecting rod 332 is separated from the rotation axis of the adjusting handle 331, so that the adjusting handle 331 drives the connecting rod 332 to move.

[0051] The adjustment hole 311 is vertically arranged, and a connecting strap 333 is slidably inserted into the adjustment hole 311. Both ends of the connecting strap 333 extend beyond the ends of the adjustment hole 311. The connecting strap 333 can be a steel strap or a plastic strap. An annular connecting section is provided at each end of the connecting strap 333. The fixing hook 320 is connected to the annular connecting section at one end of the connecting strap 333. The connecting rod 332 is a U-shaped rod that is sleeved onto the annular connecting section at the other end of the fixing hook 320.

[0052] The distance between the rotation axis of the adjustment handle 331 and the fixed hook 320 is smaller than the distance between the hinge axis 334 of the connecting rod 332 and the fixed hook 320 .

[0053] Specifically, refer to Figure 3 and Figure 4 A hinge shaft 334 is rotatably provided on the adjustment handle 331 , and the connecting rod 332 is slidably passed through the hinge shaft 334 . Two limit blocks 335 are provided on the connecting rod 332 , and the hinge shaft 334 is located between the two limit blocks 335 .

[0054] The limiting block 335 may be a nut, the connecting rod 332 may be a threaded rod, the nut is threadedly connected to the threaded rod, and the distance between the two nuts is adjustable.

[0055] The axis direction of the hinge shaft 334 is arranged horizontally, and the rotation axis of the adjustment handle 331 is parallel to the axis direction of the hinge shaft 334. When the fixing hook 320 is separated from the fixing hole 3, the adjustment handle 331 is arranged above the mounting seat 310 and tilted. When the locking lever 332 is unlocked, the locking lever 333 is unlocked and the locking lever 334 is unlocked, thereby locking the locking lever 332 in the unlock position and the winch 330 in the unlock position. When it is necessary to loosen the fixing hook 320 and the fixing hole 3 , it is only necessary to rotate the adjusting handle 331 in the opposite direction and rotate the adjusting handle 331 to the top of the mounting seat 310 to loosen the connecting belt 333 .

[0056] In some embodiments, reference Figure 2 The four circumferential sides of the pressing plate 100 are hingedly provided with connecting frames 200.

[0057] For example, refer to Figure 2 The pressing plate 100 is hinged with connecting frames 200 on all sides to improve the fixing effect of the pressing plate 100. At the same time, adjacent connecting frames 200 can also be fixed with fixing plates and bolts to form the connecting frames 200 on all sides as a whole, thereby improving the stability of the connection of the pressing plate 100.

[0058] Exemplarily, the connecting frame 200 is formed by interlacing and fixing a plurality of steel bars.

[0059] In some embodiments, reference Figure 2 The battery pack airtightness test fixture also includes a reinforcement assembly 400, which includes a mounting rod 410, a reinforcement rod 420 and a second adjustment member 430. The mounting rod 410 is arranged on the connecting frame 200, and the second adjustment member 430 is arranged on the mounting rod 410 and connected to the reinforcement rod 420 to drive the reinforcement rod 420 to move toward the side wall of the battery pack so that the reinforcement rod 420 abuts against the side wall of the battery pack.

[0060] Mounting rod 410 is welded to the center of connecting frame 200 and is positioned horizontally. Multiple second adjustment members 430 are provided, each mounted on mounting rod 410. Reinforcement rod 420 is positioned between connecting frame 200 and the battery pack, abutting the sidewalls of the battery pack. The second adjustment members 430 adjust the position of reinforcement rod 420 so that it contacts the sidewalls of the battery pack, thereby limiting the sidewalls of the battery pack cover 1 and reducing the possibility of deformation of the cover 1.

[0061] Exemplarily, reinforcement components 400 are provided on the connecting frames 200 around the pressing plate 100 to reinforce the four side walls of the upper cover 1 .

[0062] In some embodiments, reference Figure 2 The second adjusting member 430 includes a screw 431, a connecting seat 432 and a threaded seat 433. The connecting seat 432 is set on the reinforcement rod 420, the threaded seat 433 is set on the mounting rod 410, and the screw 431 is threaded through the threaded seat 433 and is rotatably connected to the connecting seat 432.

[0063] Furthermore, a crossbar is welded to the end of the screw 431 to form a handle for rotating the screw 431. The threaded seat 433 is mounted on the mounting rod 410, and the screw 431 is threadedly inserted into the threaded seat 433. The end of the screw 431 is rotatably connected to the connecting seat 432, and the position of the connecting seat 432 can be adjusted by rotating the screw 431.

[0064] In some embodiments, reference Figure 2 A reinforcement frame 500 is provided on the pressing plate 100 , and the connecting frame 200 is hinged on the reinforcement frame 500 .

[0065] The reinforcing frame 500 and the connecting frame 200 are also formed by interlacing and fixing a plurality of steel bars, and the connecting frame 200 is hinged at the end of the reinforcing frame 500 to further improve the strength of the pressing plate 100 and reduce the possibility of deformation of the pressing plate 100.

[0066] In some embodiments, the reinforcement frame 500 is provided with a lifting lug 510 .

[0067] The provision of the lifting lug 510 facilitates the lifting of the test fixture, making transportation more convenient and quick.

[0068] The present application provides a battery pack airtightness test tool, which places a pressing plate 100 on the upper cover 1 of the battery pack and abuts against the upper cover 1 of the battery pack, and then extends the connecting frames 200 on both sides of the pressing plate 100 to the frame 2 of the battery pack by rotating the connecting frames 200, and fixes the connecting frames 200 on the battery pack frame 2 through the fixing assembly 300 to achieve the connection between the connecting frames 200 and the battery pack frame 2, and then fixes the pressing plate 100 on the battery pack; through the abutment of the pressing plate 100 with the upper cover 1 of the battery pack, the bulging and deformation of the plastic upper cover 1 of the battery pack is reduced, and the stability of the effective volume of the battery pack during the airtightness test is improved, thereby improving the accuracy of the airtightness test data.

[0069] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present invention are indicated by the following claims.

[0070] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A battery pack airtightness test tool, characterized in that: A pressing plate is included, and the pressing plate is used to press the upper cover of the battery pack; A connecting frame is provided on two opposite sides of the pressing plate, the connecting frame is hinged to the pressing plate, and the connecting frame extends to the battery pack frame; A fixing assembly is provided on the connecting frame, and the fixing assembly is used to be connected to the battery pack skeleton to fix the connecting frame.

2. The battery pack airtightness test fixture according to claim 1, characterized in that: The fixing assembly includes a mounting seat, a fixing hook and a first adjusting member. The mounting seat is arranged on the connecting frame. The first adjusting member is arranged on the mounting seat and connected to the fixing hook. The first adjusting member is used to adjust the position of the fixing hook so that the fixing hook is hooked on the fixing hole on the battery pack frame.

3. The battery pack airtightness test fixture according to claim 2, characterized in that: The first adjusting member includes an adjusting handle, a connecting rod and a connecting belt. An adjusting hole is opened on the mounting seat. The connecting belt is slidably inserted into the adjusting hole. The fixing hook is connected to one end of the connecting belt. The other end of the connecting belt is connected to the connecting rod. The adjusting handle is rotatably set on the mounting seat. The connecting rod is hinged on the adjusting handle. The hinge axis of the connecting rod is separated from the rotation axis of the adjusting handle so that the adjusting handle drives the connecting rod to move.

4. The battery pack airtightness test fixture according to claim 3, characterized in that: The distance between the rotation axis of the adjusting handle and the fixing hook is smaller than the distance between the hinge axis of the connecting rod and the fixing hook.

5. The battery pack airtightness test fixture according to claim 4, characterized in that: A hinge shaft is rotatably provided on the adjusting handle, the connecting rod is slidably provided on the hinge shaft, two limit blocks are provided on the connecting rod, and the hinge shaft is located between the two limit blocks.

6. The battery pack airtightness test tool according to any one of claims 1 to 5, characterized in that: Connecting frames are hingedly provided on four circumferential sides of the pressing plate.

7. The battery pack airtightness test tool according to any one of claims 1 to 5, characterized in that: It also includes a reinforcement assembly, which includes a mounting rod, a reinforcement rod and a second adjustment member. The mounting rod is arranged on the connecting frame, and the second adjustment member is arranged on the mounting rod and connected to the reinforcement rod to drive the reinforcement rod to move toward the side wall of the battery pack so that the reinforcement rod abuts against the side wall of the battery pack.

8. The battery pack airtightness test fixture according to claim 7, characterized in that: The second adjusting member includes a screw rod, a connecting seat and a threaded seat. The connecting seat is arranged on the reinforcing rod, the threaded seat is arranged on the mounting rod, and the screw rod is threaded through the threaded seat and is rotatably connected to the connecting seat.

9. The battery pack airtightness test tool according to any one of claims 1 to 5, characterized in that: A reinforcement frame is provided on the pressing plate, and the connecting frame is hinged on the reinforcement frame.

10. The battery pack airtightness test fixture according to claim 9, characterized in that: The reinforcement frame is provided with lifting lugs.

Images