Battery pack air tightness detection equipment

Abstract

The utility model discloses battery pack air tightness detection equipment, and belongs to the field of battery pack production and manufacturing, the battery pack air tightness detection equipment comprises a bearing table, the bearing table is used for bearing a to-be-detected battery pack, one side of the bearing table is provided with a mounting part, and the other side of the bearing table is provided with a locking buckle; one side of the pressing plate is connected with the mounting part through a rotating shaft, the extending direction of the rotating shaft is parallel to the surface of the bearing table, the other side of the pressing plate is provided with a supporting part which is used for abutting against the bearing table and can be locked by the locking buckle, and when the supporting part is locked by the locking buckle, the gap distance between the pressing plate and the bearing table is the thickness of the battery pack to be detected; and the driving assembly is connected with the pressing plate and used for driving the pressing plate to overturn around the rotating shaft, overturning has a first direction and a second direction which can be switched, the first direction is the direction in which the supporting part approaches the locking buckle, and the second direction is the direction in which the supporting part is far away from the locking buckle. When the equipment is used for inflating the battery pack, the condition that the upper cover of the battery pack bulges and deforms can be prevented.

Description

Technical Field

[0001] The present application belongs to the field of energy storage batteries, especially the field of battery pack detection. In particular, the present application relates to a battery pack air tightness detection device. Background Art

[0002] During the battery production process, testing the battery pack is an indispensable process link, and the air tightness test of the battery pack is a crucial one.

[0003] When testing the air tightness of a battery pack, it is usually necessary to inflate and pressurize the battery pack, for example, by using an explosion-proof valve or a pressure relief valve port as the inflation port, and observing the pressure change after cutting off the gas source, and determining the air tightness of the battery pack based on the pressure change. However, when current testing equipment is used to test the air tightness of a battery pack, it is easy to cause the upper cover of the battery pack to bulge and deform. Utility Model Content

[0004] The example of the present application provides a battery pack air tightness detection device, which can prevent the battery pack cover from bulging and deforming when the battery pack is inflated.

[0005] The solution of this application example is implemented through the following contents.

[0006] In a first aspect, an example of the present application provides a battery pack air tightness detection device, comprising:

[0007] The carrying platform is used to carry the battery pack to be tested, and a mounting portion is provided on one side of the carrying platform and a locking buckle is provided on the other side;

[0008] A pressing plate, one side of the pressing plate is connected to the mounting portion through a rotating shaft, the extending direction of the rotating shaft is parallel to the surface of the load-bearing platform, the other side of the pressing plate is provided with a supporting portion for abutting against the load-bearing platform and can be locked by a locking buckle, and when the supporting portion is locked by the locking buckle, the gap distance between the pressing plate and the load-bearing platform is the thickness of the battery pack to be tested;

[0009] A driving assembly is connected to the pressure plate and is used to drive the pressure plate to flip around the rotating shaft, and the flipping has a switchable first direction and a second direction, the first direction is the direction in which the support part approaches the locking buckle, and the second direction is the direction in which the support part moves away from the locking buckle.

[0010] The battery pack air tightness testing equipment provided in the present application drives the pressure plate to flip around the rotating shaft set on one side of the pressure plate through the driving component, so that the pressure plate can cover or expose the battery pack, and a supporting part is provided on the other side of the pressure plate, which can be locked by the locking buckle on the supporting platform, and when the pressure plate is driven to make the supporting part on the other side abut the supporting platform and be locked by the locking buckle, the gap distance between the pressure plate and the supporting platform is the thickness of the battery pack to be tested. This gap distance can ensure that the battery pack is pressed by the pressure plate, thereby preventing the upper cover from bulging and deforming when the battery pack is inflated.

[0011] According to some examples of the first aspect of the present application, the driving component includes:

[0012] A support frame, located at one side of the mounting portion and provided with support wheels;

[0013] A traction rope, one end of which is connected to the pressure plate and is wound around the outer circumference of the support wheel;

[0014] The rotating assembly winds up the traction rope from the other end of the traction rope and can be driven to rotate to change the length of the traction rope wound around the rotating assembly.

[0015] The pressing plate is lowered by releasing the traction rope by rotating the assembly and the battery pack is pressed onto the loading platform, and the pressing plate is flipped upward by retracting the traction rope to expose the battery pack. The driving assembly of this structure is simple in structure, easy to implement, and convenient to operate and maintain.

[0016] According to some examples of the first aspect of the present application, the driving assembly further comprises at least one guide wheel, the guide wheel being arranged between the supporting wheel and the rotating assembly, and the traction rope being wound around the outer circumference of each guide wheel.

[0017] The path of the traction rope can be adjusted by setting the guide wheel, so that the rotating component can be adjusted according to the space conditions to be set in a position that is more convenient for operation.

[0018] According to some examples of the first aspect of the present application, the rotating assembly is installed on a carrier platform or a support frame.

[0019] The installation position of the rotating assembly can be flexibly set on the existing structure as required.

[0020] According to some examples of the first aspect of the present application, the rotating assembly includes:

[0021] Rope drum;

[0022] A rope winding shaft, which is located in the rope drum and winds the traction rope from the other end of the traction rope;

[0023] The driving member is connected to the rope winding shaft and is used to drive the rope winding shaft to rotate along its own axis. The rotation can change the length of the traction rope wound by the rope winding shaft in the rope drum.

[0024] The driving member drives the rope reel located in the rope drum, so that the traction rope can be rolled up or released, and the rolled up traction rope is located in the rope drum, which is convenient for the storage and arrangement of the traction rope.

[0025] According to some examples of the first aspect of the present application, one end of the traction rope is detachably connected to the pressing plate, which facilitates maintenance and replacement of the traction rope and / or the pressing plate.

[0026] As an example of a detachable connection, a first hook is provided at one end of the traction rope, and a first hook matching the first hook is installed on the pressure plate.

[0027] According to some examples of the first aspect of the present application, the airtightness detection device further includes an anti-falling structure, and the anti-falling structure includes:

[0028] Safety rope;

[0029] The reel includes a safety reel and a reel-sensitive device. The safety rope is wound around the safety reel and one end of the safety rope is connected to a pressure plate. Under the tension of the pressure plate, the safety reel rotates to pull out the safety rope, and when the pulling speed reaches a preset threshold, the reel-sensitive device is triggered to limit the rotation of the safety reel.

[0030] This anti-fall structure replaces the traction rope to pull the pressure plate after the traction rope breaks, thereby preventing danger from occurring after the traction rope breaks suddenly.

[0031] According to some examples of the first aspect of the present application, one end of the safety rope is detachably connected to the pressure plate.

[0032] The detachable manner facilitates maintenance and replacement of the anti-fall structure and / or the pressure plate.

[0033] According to some examples of the first aspect of the present application, the mounting portion includes:

[0034] Two first mounting bodies, the two first mounting bodies are respectively fixedly mounted on one end of the bearing platform, and the two first mounting bodies have a plurality of thread grooves arranged in an array along their own vertical direction;

[0035] Two second mounting bodies, both ends of the rotating shaft are rotatably mounted on one second mounting body respectively, and each second mounting body is provided with a vertical waist-shaped hole;

[0036] Two groups of fixing bolts, each group of fixing bolts passes through a waist-shaped hole on a second mounting body and is threadedly connected with a thread groove on a first mounting body to fix the second mounting body on the first mounting body.

[0037] Through the cooperation between the second installation body and the first installation body, the installation height of the rotating shaft can be conveniently adjusted to meet the pressing requirements of battery packs with different thicknesses.

[0038] According to some examples of the first aspect of the present application, an extension portion is provided on one side of the support platform, and a storage slot is formed on the extension portion, and the storage slot is used to place the connector connected to the battery pack to be tested. The provision of the storage slot facilitates the storage and placement of the battery pack inflation connector, thereby improving the neatness of the on-site environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] For a clearer explanation, the following briefly introduces the drawings required for the description.

[0040] Figure 1 A schematic structural diagram of a battery pack air tightness detection device from a first perspective according to an embodiment of the present application;

[0041] Figure 2 A schematic structural diagram of a battery pack air tightness detection device from a second perspective according to an embodiment of the present application;

[0042] Figure 3 This is a structural schematic diagram of the connection between a pressing plate and a mounting portion according to an embodiment of the present application;

[0043] Figure 4 This is a schematic structural diagram of the installation part of a battery pack air tightness detection device according to an embodiment of the present application.

[0044] Description of reference numerals:

[0045] 1-carrying platform; 2-pressing plate; 3-battery pack; 4-driving assembly; 5-anti-fall structure;

[0046] 11-installation part; 12-locking buckle; 13-storage slot; 21-rotating shaft; 22-support part; 23-first clamp ring; 41-support frame; 42-support wheel; 43-traction rope; 44-rotating assembly; 45-guide wheel; 46-first hook; 51-safety rope; 52-retractor;

[0047] 111-first mounting body; 112-second mounting body; 113-guide rod; rope drum-441;

[0048] 1111-thread groove; 1121-waist-shaped hole. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0050] The battery pack has a shell including an upper cover and a lower cover. The upper cover surface defines the upper surface of the battery pack, and the lower cover bottom surface defines the lower surface of the battery pack. At present, in the related technology for testing the air tightness of the battery pack, the inflation operation often causes the upper cover of the battery pack to bulge and deform. To this end, an embodiment of the present application provides a battery pack air tightness testing device.

[0051] Figure 1 and Figure 2 The schematic diagram of the structure of the battery pack air tightness testing equipment from different perspectives is shown, and the battery pack air tightness testing equipment includes: a carrying platform 1, the carrying platform 1 is used to carry the battery pack 3 to be tested, one side of the carrying platform 1 is provided with a mounting portion 11, and the other side is provided with a locking buckle 12; a pressing plate 2, one side of the pressing plate 2 is connected to the mounting portion 11 through a rotating shaft 21, and the extension direction of the rotating shaft 21 is parallel to the surface of the carrying platform 1, and the other side of the pressing plate 2 is provided with a supporting portion 22 for abutting against the carrying platform 1 and can be locked by the locking buckle 12, and when the supporting portion 22 is locked by the locking buckle 12, the gap distance between the pressing plate 2 and the carrying platform 1 is the thickness of the battery pack 3 to be tested; a driving component 4, the driving component 4 is connected to the pressing plate 2 and is used to drive the pressing plate 2 to flip around the rotating shaft 21, and the flipping has a switchable first direction and a second direction, the first direction is the direction in which the supporting portion 22 approaches the locking buckle 12, and the second direction is the direction in which the supporting portion 22 moves away from the locking buckle 12.

[0052] In this embodiment, the battery pack 3 to be tested is placed on the carrier 1, the lower surface of the battery pack 3 is in contact with the carrier 1, and the upper surface of the battery pack 3 is pressed by a pressing plate 2, which is connected to the mounting portion 11 on one side of the carrier 1 through a rotating shaft 21, and the extension direction of the rotating shaft 21 is set so that its extension direction is parallel to the surface of the carrier 1. When the pressing plate 2 rotates around the rotating shaft 21, it can be pressed on the upper surface of the battery pack 3. The upper and lower surfaces of the battery pack 3 are pressed by the pressing plate 2 and the carrier 1, so that when the battery pack 3 is inflated for airtightness testing, the upper cover of the battery pack 3 is prevented from bulging and deforming.

[0053] In addition, a locking buckle 12 is provided on the side of the supporting platform 1 away from the mounting portion 11, and a supporting portion 22 is provided on the pressing plate 2 on the side away from the rotating shaft 21. When the pressing plate 2 flips toward the supporting platform 1 as the rotating shaft 21 rotates, the supporting portion 22 abuts against the supporting platform 1, and the supporting portion 22 is locked by the locking buckle 12 to achieve a fixed connection between the pressing plate 2 and the supporting platform 1. At this time, the gap distance between the pressing plate 2 and the supporting platform 1 is the thickness of the battery pack 3 to be tested, that is, the battery pack 3 to be tested is placed on the surface of the supporting platform 1. When the pressing plate 2 is locked and connected with the locking buckle 12 on the supporting platform 1 through the supporting portion 22, the pressing plate 2 and the supporting platform 1 are directly attached to the upper and lower surfaces of the battery pack 3 to be tested and provide pressure. When the battery pack 3 to be tested is subjected to an airtightness test and the battery pack 3 is inflated, this pressure-providing attachment can prevent the upper cover of the battery pack 3 from bulging and deforming.

[0054] Combined with Figure 1 and attached Figure 2 As shown, a driving assembly 4 fixedly connected to the pressing plate 2 is also provided at one end of the mounting portion 11, and the driving assembly 4 is used to drive the pressing plate 2 to rotate around the rotating shaft 21; wherein, when the pressing plate 2 rotates around the rotating shaft 21, it has a first direction and a second direction that can be switched, the first direction is the direction in which the supporting portion 22 approaches the locking buckle 12, and is used for pressing the pressing plate 2 on the upper surface of the battery pack 3 and performing air tightness testing, and the second direction is the direction in which the supporting portion 22 moves away from the locking buckle 12, and is used for lifting the pressing plate 2 after the air tightness testing to replace the battery pack 3 to be tested. The driving assembly 4 is used to lower the pressing plate 2 and press the battery pack 3 onto the supporting platform 1, and to flip the pressing plate 2 upward to expose the battery pack 3, which has a simple structure, is easy to implement, and is easy to operate and maintain.

[0055] As attached Figure 2 As shown, the pressing plate 2 is pressed or moved away from the battery pack 3 to be tested by the flipping movement around the rotating shaft 21. The flipping of the pressing plate 2 can be achieved by traction of the traction rope 43. When the driving component 4 is set in this embodiment, the driving component 4 includes: a support frame 41, which is located on one side of the mounting portion 11 and is provided with a supporting wheel 42; a traction rope 43, one end of which is connected to the pressing plate 2 and is wound around the outer periphery of the supporting wheel 42; and a rotating component 44, which winds the traction rope 43 from the other end of the traction rope 43 and can be driven to rotate to change the length of the traction rope 43 wound around the rotating component 44.

[0056] In this embodiment, the traction rope 43 is driven by a rotating component 44. Specifically, a support frame 41 is set on one side of the mounting portion 11, and a support wheel 42 is set on the top or upper position of the support frame 41. The traction rope 43 is wound around the outer periphery of the support wheel 42, one end of the traction rope 43 is connected to the pressure plate 2, and one end of the traction rope 43 is wound on the rotating component 44. The rotating component 44 is rotated to change the winding length of the traction rope 43, thereby realizing the flipping control of the pressure plate 2.

[0057] By changing the force direction of the traction rope 43 through the support wheel 42 arranged on the support frame 41, the fixing position and fixing method of the rotating component 44 can be made more flexible, and then the traction rope 43 is released by the driving component 4 to lower the pressure plate 2 and press the battery pack 3 on the supporting platform 1, and the pressure plate 2 can be flipped upward by retracting the traction rope 43 to expose the battery pack 3. This structure is simple, easy to implement, and convenient to operate and maintain.

[0058] Continue as attached Figure 2 As shown, the driving assembly 4 further includes at least one guide wheel 45, which is arranged between the supporting wheel 42 and the rotating assembly 44, and the traction rope 43 is wound around the outer periphery of each guide wheel 45. Specifically, the supporting wheel 42 is arranged at one end of the supporting frame 41, and the rotating assembly 44 can be arranged at the bottom of the supporting frame 41, or at the middle position or other positions of the supporting frame 41. By arranging at least one guide wheel 45 between the supporting wheel 42 and the rotating assembly 44, the path of the traction rope 43 can be adjusted, so that the rotating assembly 44 can be adjusted according to the space conditions to be arranged at a position that is more convenient for operation.

[0059] The supporting wheel 42 and the guide wheel 45 can both use pulleys to adjust the path of the traction rope 43, and specifically, use fixed pulleys to achieve this.

[0060] In one or more implementations of this embodiment, the rotating assembly 44 is installed on the carrier 1 or the support frame 41. The support frame 41 is located on one side of the mounting portion 11 of the carrier 1, and the support wheel 42 is arranged on one side of the support frame 41. When the rotating assembly 44 is installed on the carrier 1 or the support frame 41, the length of the traction rope 43 between the rotating assembly 44 and the support wheel 42 is relatively short, and fewer guide wheels 45 are arranged to support the traction rope 43 and adjust the traction path.

[0061] In other embodiments, the rotating assembly 44 can also be installed at other positions. For example, a fixed frame is provided on the side of the support frame 41, and the rotating assembly 44 is installed on the fixed frame; or a beam is provided in the vertical direction of the support frame 41, and the rotating assembly 44 is installed on the beam, etc. The traction rope 43 can be used to drive the pressure plate 2 to rotate around the rotating shaft 21 to realize the downward and upward flipping of the pressure plate 2, which will not be repeated here.

[0062] As attached Figure 2 As shown, as one embodiment, the rotating assembly 44 includes a rope drum 441 and a rope winding shaft (not shown in the drawings), the rope winding shaft is located in the rope drum 441, and the rope winding shaft winds the traction rope 43 from the other end of the traction rope 43; a driving member (not shown in the drawings), the driving member is connected to the rope winding shaft, and is used to drive the rope winding shaft to rotate along its own axis, and the rotation can change the length of the traction rope 43 wound by the rope winding shaft in the rope drum 441.

[0063] For example, the driving member can be a rotating handle, and the rope winding shaft can be rotated in the rope drum 441 by manual control, thereby driving the traction rope 43 to control the pressure plate 2; the rope winding shaft can also be rotated in the rope drum 441 by motor control, thereby driving the traction rope 43 to control the pressure plate 2. Any of the above driving modes can drive the rope winding shaft located in the rope drum 441 through the driving member, so as to retract or release the traction rope 43, and place the retracted traction rope 43 in the rope drum 441, so as to facilitate the storage and arrangement of the traction rope 43. Other examples of the driving member will not be repeated in this embodiment.

[0064] As attached Figure 2 As shown, in this embodiment, one end of the traction rope 43 and the pressure plate 2 are detachably connected, such as a threaded connection, a snap connection, and a hinge connection, etc., which facilitates maintenance and replacement of the traction rope 43 and / or the pressure plate 2.

[0065] In one embodiment, one end of the traction rope 43 and the pressure plate 2 are connected by a buckle. Specifically, one end of the traction rope 43 is provided with a first hook 46, and the pressure plate 2 is provided with a first clamping ring 23 that cooperates with the first hook 46. The buckle connection method is simple in structure, easy to disassemble, and low in cost.

[0066] Continue as attached Figure 2 As shown, the air tightness detection equipment also includes an anti-fall structure 5, the anti-fall structure 5 includes a safety rope 51 and a reel 52, the reel 52 includes a safety reel (not shown in the drawings) and a reel-sensitive device (not shown in the drawings), the safety rope 51 is wound around the safety reel and one end of the safety rope 51 is connected to the pressure plate 2, under the tension of the pressure plate 2, the safety reel rotates to pull out the safety rope 51, and when the pulling speed reaches a preset threshold, the reel-sensitive device is triggered to limit the rotation of the safety reel.

[0067] In this embodiment, an anti-falling structure 5 is adopted, one end of the safety rope 51 is connected to the pressing plate 2, the pressing plate 2 drives the safety reel to rotate so as to pull out the safety rope 51, and a reel-sensitive device is used to control the pulling out of the safety rope 51. When the pulling out speed of the safety rope 51 reaches a preset threshold, the reel-sensitive device is triggered to limit the rotation of the safety reel. That is, after the traction rope 43 breaks, when the pressing plate 2 drives the safety rope 51 to be pulled out quickly, the reel-sensitive device is triggered to limit the rotation of the safety reel, and the safety rope 51 replaces the traction rope 43 to pull the pressing plate 2, thereby preventing the pressing plate 2 from being lowered at a very fast speed to damage the battery pack 3 or cause other dangers.

[0068] In specific implementation, one end of the safety rope 51 and the pressing plate 2 are detachably connected, such as by threaded connection, buckle connection, hinge connection, etc., to facilitate maintenance and replacement of the traction rope 43 and / or the pressing plate 2. In this embodiment, the detachable connection between one end of the safety rope 51 and the pressing plate 2 can also be a buckle connection, which is the same as the detachable connection between one end of the traction rope 43 and the pressing plate 2, with a simple structure, convenient disassembly, and low cost, and will not be described in detail in this embodiment.

[0069] Combined with Figure 3 and attached Figure 4 As shown, in this embodiment, the mounting portion 11 includes: two first mounting bodies 111, the two first mounting bodies 111 are respectively fixedly mounted on one end of the supporting platform 1, and the two first mounting bodies 111 have a plurality of thread grooves 1111 arrayed along their own vertical direction; two second mounting bodies 112, the two ends of the rotating shaft 21 are respectively rotatably mounted on a second mounting body 112, and each second mounting body 112 is provided with a vertical waist-shaped hole 1121; two groups of fixing bolts (not shown in the drawings), each group of fixing bolts passes through the waist-shaped hole 1121 on a second mounting body 112 and is threadedly connected to a thread groove 1111 on a first mounting body 111, so as to fix the second mounting body 112 on the first mounting body 111.

[0070] By arranging a plurality of thread grooves 1111 in an array on the first mounting body 111 and arranging waist-shaped holes on the second mounting body 112, when the first mounting body 111 and the second mounting body 112 are connected by two sets of fixing bolts, and the two sets of fixing bolts are fixed at thread grooves 1111 at different heights, the height adjustment of the rotating shaft 21 is achieved to meet the pressing requirements of battery packs 3 of different thicknesses.

[0071] In addition, continue as attached Figure 4 As shown, the first mounting body 111 is fixedly connected with a guide rod 113 along its extension direction, and the second mounting body 112 is provided with a through hole along its extension direction, and the guide rod 113 passes through the through hole and is fixedly connected with the first mounting body 111. When the fixing bolts need to be removed to adjust the position of the pressing plate 2, the pressing plate 2 is prevented from being deflected.

[0072] As attached Figure 2 As shown, an extension portion is provided on one side of the carrier 1, and a storage slot 13 is formed on the extension portion. The storage slot 13 is used to place the connector connected to the battery pack 3 to be tested, so as to store and place the battery pack 3 inflation connector.

[0073] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0074] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present utility model.

[0075] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0076] Although multiple embodiments of the utility model have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. Battery pack air tightness testing equipment, characterized in that: include: A carrying platform, the carrying platform is used to carry the battery pack to be tested, one side of the carrying platform is provided with a mounting portion, and the other side is provided with a locking buckle; A pressing plate, one side of which is connected to the mounting portion via a rotating shaft, the extending direction of the rotating shaft is parallel to the surface of the carrying platform, the other side of the pressing plate is provided with a supporting portion for abutting against the carrying platform and being locked by the locking buckle, and when the supporting portion is locked by the locking buckle, the gap distance between the pressing plate and the carrying platform is the thickness of the battery pack to be tested; A driving assembly is connected to the pressure plate and is used to drive the pressure plate to flip around the rotating shaft, and the flipping has a switchable first direction and a second direction, the first direction is the direction in which the support portion approaches the locking buckle, and the second direction is the direction in which the support portion moves away from the locking buckle.

2. The battery pack air tightness detection device according to claim 1, characterized in that: The drive assembly comprises: A support frame, located at one side of the mounting portion and provided with support wheels; A traction rope, one end of which is connected to the pressing plate and is wound around the outer circumference of the supporting wheel; A rotating assembly is used to wind the traction rope from the other end of the traction rope and can be driven to rotate to change the length of the traction rope wound around the rotating assembly.

3. The battery pack air tightness detection device according to claim 2, characterized in that: The driving assembly further comprises at least one guide wheel, which is arranged between the supporting wheel and the rotating assembly, and the traction rope is wound around the outer circumference of each guide wheel.

4. The battery pack air tightness detection device according to claim 3, characterized in that: The rotating assembly is installed on the bearing platform or the supporting frame.

5. The battery pack air tightness detection device according to claim 2, characterized in that: The rotating assembly comprises: Rope drum; A rope winding shaft, the rope winding shaft is located in the rope drum, and the rope winding shaft winds the traction rope from the other end of the traction rope; A driving member is connected to the rope winding shaft and is used to drive the rope winding shaft to rotate along its own axis, and the rotation can change the length of the traction rope wound by the rope winding shaft in the rope drum.

6. The battery pack air tightness detection device according to any one of claims 2 to 5, characterized in that: One end of the traction rope is detachably connected to the pressing plate.

7. The battery pack air tightness detection device according to claim 6, characterized in that: A first hook is provided at one end of the traction rope, and a first clamping ring matched with the first hook is installed on the pressure plate.

8. The battery pack air tightness detection device according to claim 1, characterized in that: The air tightness detection device also includes an anti-falling structure, and the anti-falling structure includes: Safety rope; A reel, the reel comprising a safety reel and a reel-sensitive device, the safety rope is wound around the safety reel and one end of the safety rope is connected to the pressure plate, under the tension of the pressure plate, the safety reel rotates to pull out the safety rope, and when the pulling speed reaches a preset threshold, the reel-sensitive device is triggered to limit the rotation of the safety reel.

9. The battery pack air tightness detection device according to claim 8, characterized in that: One end of the safety rope is detachably connected to the pressing plate.

10. The battery pack air tightness detection device according to claim 1, characterized in that: The installation part comprises: Two first mounting bodies, the two first mounting bodies are respectively fixedly mounted on one end of the bearing platform, and the two first mounting bodies have a plurality of thread grooves arranged in an array along their own vertical direction; Two second mounting bodies, both ends of the rotating shaft are rotatably mounted on one of the second mounting bodies, and each of the second mounting bodies is provided with a vertical waist-shaped hole; Two groups of fixing bolts, each group of fixing bolts passes through a waist-shaped hole on the second mounting body and is threadedly connected with a thread groove on the first mounting body to fix the second mounting body on the first mounting body.

11. The battery pack air tightness detection device according to claim 1, characterized in that: An extension portion is provided on one side of the supporting platform, and a storage groove is formed on the extension portion. The storage groove is used to place a connector connected to the battery pack to be tested.

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