Compression tool for air tightness test of battery pack

Abstract

The utility model belongs to the technical field of batteries, and provides a battery pack air tightness test pressing tool which is suitable for pressing a battery pack box cover, the battery pack box cover is provided with a lifting lug, and the battery pack air tightness test pressing tool comprises a pressing unit; the lower pressing plate is arranged at the end of the pressing unit, and the lower pressing plate is suitable for abutting against the top of the lifting lug; according to the utility model, the pressing unit abuts against the top surface of the battery pack box cover, the lower pressing plate can abut against the top of the lifting lug, and then the clamping device clamps the lower pressing plate and the lifting lug, so that when the air tightness test is carried out on the battery pack, the battery pack box cover is pressed by the battery pack air tightness test pressing tool, and the clamping device is suitable for clamping the pressing plate and the lifting lug. And the problem of swelling of the battery pack box cover is avoided, and the quality of the battery pack is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery pack air tightness test and compression tooling. Background Art

[0002] With the development of the new energy industry, the design requirements for battery packs are becoming higher and higher, and the high-quality development of batteries is becoming more and more stringent.

[0003] In order to ensure the quality of the battery pack, the battery pack needs to be tested for air tightness. During the air tightness test, the battery pack cover is prone to bulging, which will affect the quality of the battery pack. Utility Model Content

[0004] In view of this, the present invention provides a battery pack air tightness test pressing tool to solve the bulging problem of the battery pack box cover existing in the prior art.

[0005] The utility model provides a battery pack air tightness test pressing tool, which is suitable for pressing the battery pack box cover, the battery pack box cover is provided with a lifting ear, and the battery pack air tightness test pressing tool comprises: a pressing unit; a lower pressing plate, which is provided at the end of the pressing unit, and the lower pressing plate is suitable for abutting against the top of the lifting ear; and a clamping device, which is suitable for clamping the pressing plate and the lifting ear.

[0006] As an optional embodiment, the pressing unit includes: a pressing frame; an upper pressing plate connected to the pressing frame, the upper pressing plate being suitable for abutting against the battery pack box cover; wherein the lower pressing plate is arranged at the end of the pressing frame.

[0007] As an optional embodiment, the compression frame includes: at least two cross bars, which are spaced apart from each other and arranged side by side; at least two longitudinal bars, which are spaced apart from each other and arranged side by side on the at least two cross bars, and the longitudinal bars are cross-arranged with the cross bars, so that the compression frame forms a frame structure.

[0008] As an optional embodiment, the pressing unit has a center of symmetry, and the at least two transverse rods and the at least two longitudinal rods are symmetrically arranged about the center of symmetry.

[0009] As an optional embodiment, the clamping unit further includes a fixing plate, which is arranged at the intersection of the longitudinal rod and the transverse rod to connect the corresponding longitudinal rod and the transverse rod, and the fixing plate and the upper pressing plate are respectively arranged on opposite sides of the clamping frame.

[0010] As an optional embodiment, an escape space is formed between the lower pressing plate and the pressing unit, and the escape space is suitable for avoiding the clamping device.

[0011] As an optional embodiment, the battery pack air tightness test pressing tool also includes a connecting frame, which is arranged at the end of the pressing unit and forms the avoidance space with the pressing unit. The connecting frame extends away from the pressing unit, and the lower pressure plate is arranged on the side of the connecting frame away from the pressing unit.

[0012] As an optional embodiment, the connecting frame includes two connecting rods, which are spaced apart from each other at the ends of the clamping unit to form the avoidance space, and the connecting rods include: a first rod body, connected to the clamping unit and extending in a direction away from the clamping unit; a second rod body, connected to one end of the first rod body away from the clamping unit, and the second rod body is arranged at an angle to the first rod body; wherein the lower pressure plate is connected to the second rod body.

[0013] As an optional embodiment, the clamping device is a toggle clamp, and the toggle clamp is provided on the battery pack box cover.

[0014] As an optional implementation, the lower pressing plate is an insulating plate.

[0015] The beneficial effects of the utility model are:

[0016] The utility model abuts against the top surface of the battery pack cover through the pressing unit, and the lower pressing plate can abut against the top of the lifting ear, and then the lower pressing plate and the lifting ear are clamped by the clamping device. Therefore, when the battery pack is subjected to an air tightness test, the battery pack cover is pressed by the battery pack air tightness test pressing tool, thereby avoiding the occurrence of the battery pack cover bulging problem and ensuring the quality of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural schematic diagram of a battery pack air tightness test pressing tool according to one embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 100-Battery pack air tightness test clamping tool; 110-Clamping unit; 101, avoidance space; 111-Clamping frame; 1111-Horizontal bar; 1112, Vertical bar; 112-Upper pressure plate; 1121, Weight reduction hole; 113-Fixed plate; 120-Lower pressure plate; 130-Connecting frame; 131-Connecting rod; 1311-First rod body; 1312-Second rod body; 132, First connecting plate; 133, Second connecting plate. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] The following combination Figure 1 , describing the embodiments of the present utility model.

[0026] like Figure 1As shown, according to an embodiment of the utility model, a battery pack air tightness test pressing tool 100 is provided, which is suitable for pressing the battery pack box cover, and the battery pack box cover is provided with a lifting ear. The battery pack air tightness test pressing tool includes: a pressing unit 110; a lower pressing plate 120, which is provided at the end of the pressing unit, and the lower pressing plate is suitable for abutting against the top of the lifting ear; a clamping device, which is suitable for clamping the pressing plate and the lifting ear.

[0027] In this embodiment, lifting lugs are provided on opposite sides of the battery pack cover to facilitate lifting the battery pack. These lugs are located below the top of the battery pack cover. The battery pack airtightness test clamping fixture 100 includes a clamping unit 110, a lower pressure plate 120, and a clamping device.

[0028] When in use, the pressing unit 110 abuts against the top surface of the battery pack cover, and the side of the pressing unit 110 abutting against the battery pack cover is the abutting surface. The lower pressing plate 120 is arranged at the end of the pressing unit 110, and the lower pressing plate 120 extends in the direction away from the abutting surface, so that after the pressing unit 110 abuts against the top surface of the battery pack cover, the lower pressing plate 120 can abut against the top of the lifting ear, and then the lower pressing plate 120 and the lifting ear are clamped by the clamping device. Therefore, when the battery pack is subjected to an airtightness test, the battery pack cover is pressed by the battery pack airtightness test clamping tool, which avoids the occurrence of the battery pack cover bulging problem and ensures the quality of the battery pack.

[0029] Lower pressing plate 120 is an insulating plate that insulates the battery pack and improves the safety of the clamping tool during use. For example, lower pressing plate 120 may be made of bakelite. Bakelite, also known as phenolic laminate, not only provides insulation but also resists static electricity, is wear-resistant, and is heat-resistant, further enhancing safety during use.

[0030] Furthermore, the pressing unit 110 includes: a pressing frame 111; an upper pressing plate 112 connected to the pressing frame 111, and the upper pressing plate 112 is suitable for abutting against the battery pack cover; wherein, the lower pressing plate 120 is provided at the end of the pressing frame 111.

[0031] The pressing unit 110 includes a pressing frame 111 and an upper pressing plate 112. The pressing frame 111 has a hollow structure, which can reduce the weight of the pressing unit. When the pressing unit 110 is applied to the battery pack box cover, it can provide force to press the battery pack box cover without causing damage to the battery pack box cover due to being too heavy, and the pressing unit is also easy to carry.

[0032] The top of the battery pack cover has a groove, and the upper pressing plate 120 can abut against the groove, while the pressing frame 111 abuts against the edge of the groove. The upper pressing plate 112 is provided with a weight-reducing hole 1121 to reduce the overall weight of the pressing unit 110.

[0033] The upper pressing plate 120 is a rectangular plate that matches the shape of the groove on the top of the battery pack cover. In this way, the pressure exerted by the upper pressing plate 120 on the groove is relatively balanced.

[0034] Furthermore, the compression frame 111 includes: at least two cross bars 1111, at least two cross bars 1111 are spaced apart from each other and arranged side by side; at least two longitudinal bars 1112, at least two longitudinal bars 1112 are spaced apart from each other and arranged side by side on at least two cross bars 1111, and the longitudinal bars 1112 are cross-arranged with the cross bars 1111, so that the compression frame 111 constitutes a frame structure.

[0035] The crossbars 1111 and longitudinal bars 1112 can be profiled. The compression frame 111 comprises two crossbars 1111 and two longitudinal bars 1112, which form a crisscross-shaped frame structure. The upper pressing plate 112 is attached to the two crossbars 1111 with adhesive. The two longitudinal bars 1112 are located above the crossbars 1111 to facilitate the removal and placement of the compression unit 110. The longitudinal bars 1112 and crossbars 1111 can be connected using screws or bolts.

[0036] Furthermore, the pressing unit 110 has a symmetry center, and at least two transverse rods 1111 and at least two longitudinal rods 1112 are symmetrically arranged about the symmetry center.

[0037] In this embodiment, the pressing unit 110 has a symmetrical center, so that the force exerted by the pressing unit 110 on the top of the battery pack cover is more balanced, thereby avoiding damage to the battery pack cover.

[0038] Specifically, the two horizontal bars 1111 are symmetrically arranged about the center of symmetry, and the two vertical bars 1112 are also symmetrical about the center of symmetry. In addition, the horizontal bars 1111 and the vertical bars 1112 also have a center of symmetry, so that the forces acting on the battery pack cover by the horizontal bars 1111 and the vertical bars 1112 are also balanced.

[0039] Furthermore, the weight-reducing holes 1121 provided on the upper platen 112, connected to the bottom of the compression frame 111, are also arranged symmetrically about the center of symmetry of the compression unit. Specifically, there are nine weight-reducing holes 1121 in the upper platen 112. The center of the middle weight-reducing hole overlaps with the center of symmetry of the compression unit.

[0040] Furthermore, the pressing unit 110 also includes a fixing plate 113, which is arranged at the intersection of the longitudinal rod 1112 and the transverse rod 1111 to connect the corresponding longitudinal rod 1112 and transverse rod 1111, and the fixing plate 113 and the upper pressing plate 112 are respectively arranged on opposite sides of the pressing frame 111.

[0041] In this embodiment, the fixing plate 113 has a center of symmetry and is a polygonal plate of uniform thickness. Screws or bolts can be passed through the fixing plate 113 to connect the longitudinal rod 1112 and the transverse rod 1111 through the fixing plate 113. Four fixing plates 113 are provided, and the longitudinal rod 1112 and the transverse rod 1111 are arranged perpendicularly and crosswise, with a fixing plate 113 provided at each intersection.

[0042] Furthermore, an escape space 101 is formed between the lower pressing plate 120 and the pressing unit. The escape space 101 is suitable for evading the clamping device, so that the clamping device can avoid interference with the clamping device when clamping the lifting ear and the lower pressing plate.

[0043] Furthermore, the battery pack air tightness test pressing tool also includes a connecting frame 130, which is arranged at the end of the pressing unit 110 and forms an avoidance space 101 with the pressing unit 110. The connecting frame 130 extends in a direction away from the pressing unit 110, and the lower pressing plate 120 is arranged on the side of the connecting frame 130 away from the pressing unit 110.

[0044] In this embodiment, the lower pressing plate 120 can be connected to the connecting frame 130 via fasteners, which can increase the structural strength of the lower pressing plate 120. The connecting frame 130 is arranged at the end of the pressing unit 110 and forms an avoidance space 101 with the pressing unit 110, so that the connecting frame 130 can ensure the structural strength of the lower pressing plate 120 without interfering with the normal use of the pressing tool.

[0045] Among them, the connecting frame 130 includes two connecting rods 131, and the two connecting rods 131 are arranged at the ends of the clamping unit 110 at intervals to form an avoidance space 101. The connecting rod 131 includes: a first rod body 1311, which is connected to the clamping unit 110 and extends in a direction away from the clamping unit 110; a second rod body 1312, which is connected to one end of the first rod body 1311 away from the clamping unit 110, and the second rod body 1312 is arranged at an angle to the first rod body 1311; wherein, the lower pressure plate 120 is connected to the second rod body 1312.

[0046] In this embodiment, the connecting rod 131 includes a first rod body 1311 and a second rod body 1312. The first rod body 1311 and the second rod body 1312 are connected end to end and perpendicular to each other, so that the connecting rod 131 forms an L-shape. The first rod body 1311 and the second rod body 1312 can be made of a profile consistent with the compression frame 111. The first rod body 1311 is connected to the compression frame 111 of the compression unit 110. The first rod body 1311 can be connected to the compression frame 111 via a first connecting piece 132. The first connecting piece 132 is provided with two first connecting pieces 132, which are arranged opposite each other. The first connecting piece 132 is provided with a plurality of small holes through which fasteners can be connected to the cross bar 1111 of the compression frame 111. There are also small holes for fasteners to pass through and connect to the first rod body 1311. This allows the first rod body 1311 to be securely and detachably connected to the cross bar 1111 of the compression frame 111 via the first connecting piece 132. In addition, the first rod 1311 and the second rod 1312 can also be connected via a second connecting piece 133. Two second connecting pieces 133 are provided, and the two second connecting pieces 133 are arranged opposite each other. The second connecting pieces 133 are provided with multiple small holes, some of which are passed through by fasteners to connect to the first rod 1311, while others are passed through by fasteners to connect to the second rod 1312. This allows the second rod 1312 to be securely and detachably connected to the first rod 1311 via the second connecting pieces 133. Therefore, the structure of the connecting frame 130 is more stable.

[0047] Furthermore, the clamping device is a toggle clamp, which is installed on the battery pack cover. It can be understood that the toggle clamp includes a connecting portion, a pressing portion, and a handle. One end of the connecting portion is connected to the battery pack cover, and the pressing portion is rotatably connected to the end of the connecting portion away from the battery pack cover. The handle is connected to the pressing portion. During use, the handle is grasped and the connecting portion is rotated. When the connecting portion abuts the top surface of the lower pressure plate, the lower pressure plate and the lifting lug can be pressed.

[0048] In another embodiment, a battery pack airtightness test clamping fixture includes a profile assembly, a bakelite board, a first connecting piece 132, a second connecting piece 133, a fixing plate 131, a lower pressure plate 120, fastening bolts, and T-nuts. The profile assembly is the clamping frame 111. The profile assembly is secured to the battery pack using the fixing plate 131 and the first connecting piece 132 via bolts and T-nuts, and the bakelite board is secured to the profile assembly using adhesive. The clamping fixture is placed on the battery pack cover, with the lower pressure plate 120 in contact with the battery pack lug. A toggle clamp is used to clamp the lower pressure plate 120 and the battery pack lug to prevent the cover from bulging during the airtightness test. When a positive pressure airtightness test is performed, the battery pack case bulges. Because the toggle clamp secures the cover to the clamping fixture, it ensures that the cover does not bulge excessively during the airtightness test, which could cause plastic deformation. Therefore, this fixture can solve the problem of battery pack cover deformation that may occur due to positive pressure inflation during the airtightness test. The beneficial effects of easy operation and high efficiency are achieved.

[0049] Obviously, the above embodiments are merely examples for clear description and are not intended to limit the implementation methods.

[0050] Those skilled in the art will readily appreciate that other variations or modifications may be made based on the above description. It is not necessary and impossible to exhaustively list all possible implementations. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery pack air tightness test pressing tool, suitable for pressing the battery pack box cover, the battery pack box cover is provided with a lifting lug, characterized in that: The battery pack air tightness test pressing tool includes: A pressing unit (110); A lower pressing plate (120) is provided at the end of the pressing unit, and the lower pressing plate is suitable for abutting against the top of the lifting ear; The clamping device is suitable for clamping the pressing plate and the lifting ear.

2. The battery pack air tightness test pressing tool according to claim 1, characterized in that: The pressing unit comprises: Compression frame (111); An upper pressing plate (112) is connected to the pressing frame (111), and the upper pressing plate (112) is suitable for abutting against the battery pack cover; Wherein, the lower pressing plate (120) is arranged at the end of the pressing frame (111).

3. The battery pack air tightness test pressing tool according to claim 2, characterized in that: The pressing frame (111) comprises: At least two cross bars (1111), the at least two cross bars (1111) are spaced apart from each other and arranged side by side; At least two longitudinal bars (1112) are spaced apart from each other and arranged side by side on the at least two transverse bars, and the longitudinal bars and the transverse bars are arranged crosswise, so that the compression frame forms a frame structure.

4. The battery pack air tightness test pressing tool according to claim 3, characterized in that: The pressing unit (110) has a symmetry center, and the at least two transverse rods (1111) and the at least two longitudinal rods (1112) are respectively arranged symmetrically about the symmetry center.

5. The battery pack air tightness test pressing tool according to claim 3, characterized in that: The pressing unit (110) further includes a fixing plate (113), which is arranged at the intersection of the longitudinal rod (1112) and the transverse rod (1111) to connect the corresponding longitudinal rod (1112) and the transverse rod (1111), and the fixing plate (113) and the upper pressing plate (112) are respectively arranged on opposite sides of the pressing frame (111).

6. A battery pack air tightness test pressing tool according to any one of claims 1 to 5, characterized in that: An escape space (101) is formed between the lower pressing plate (120) and the pressing unit (110), and the escape space (101) is suitable for escaping the clamping device.

7. The battery pack air tightness test pressing tool according to claim 6, characterized in that: The battery pack air tightness test pressing tool further includes a connecting frame (130), the connecting frame (130) is arranged at the end of the pressing unit (110), and forms the avoidance space (101) together with the pressing unit (110), the connecting frame (130) extends in a direction away from the pressing unit (110), and the lower pressing plate (120) is arranged on a side of the connecting frame (130) away from the pressing unit (110).

8. The battery pack air tightness test pressing tool according to claim 7, characterized in that: The connecting frame (130) includes two connecting rods (131), and the two connecting rods (131) are arranged at the ends of the pressing unit (110) at intervals to form the avoidance space (101). The connecting rods (131) include: A first rod (1311) is connected to the pressing unit and extends in a direction away from the pressing unit (110); a second rod (1312) connected to an end of the first rod (1311) away from the pressing unit (110), and the second rod (1312) and the first rod (1311) are arranged at an angle; Wherein, the lower pressing plate (120) is connected to the second rod body (1312).

9. A battery pack air tightness test pressing tool according to any one of claims 1 to 5, characterized in that: The clamping device is a toggle clamp, which is arranged on the battery pack box cover.

10. A battery pack air tightness test pressing tool according to any one of claims 1 to 5, characterized in that: The lower pressing plate (120) is an insulating plate.

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