Battery pack airtightness testing device

Abstract

This application provides a battery pack airtightness testing device, relating to the field of battery pack testing technology. The device includes a first clamping mechanism, a second clamping mechanism, a drive assembly, a lifting assembly, a mounting component, and a clamping component. The first and second clamping mechanisms are arranged opposite to each other, and both are slidably connected to the mounting component. The drive assembly can drive the first and second clamping mechanisms to move closer or further apart, so that they cooperate to clamp the battery pack. The lifting assembly can drive the clamping component to move up and down, so that the clamping component approaches the top surface of the battery pack located between the first and second clamping mechanisms from above. The distance between the first and second clamping mechanisms is adjustable, enabling the battery pack airtightness testing device to test battery packs of various sizes. Adjusting the distance between the first and second clamping mechanisms via the drive assembly is a convenient method.

Description

Technical Field

[0001] This application relates to the field of battery pack testing technology, and in particular to a battery pack airtightness testing device. Background Technology

[0002] A battery pack is an energy storage device composed of multiple battery cells. After the battery pack is manufactured, a sealing test is required. The specific test process involves inflating the battery pack with air until the internal pressure reaches a predetermined value. After a period of time, the air pressure value inside the battery pack is measured using an airtightness testing instrument. If the air pressure value is lower than the predetermined range, the battery pack fails to meet the sealing standard; if the air pressure value is within the predetermined range, the battery pack passes the sealing standard.

[0003] After the battery pack is inflated, the battery pack casing will deform. To prevent excessive deformation, a clamp is used to hold the battery pack in place, thus limiting the amount of deformation. Existing clamps include a support platform, two clamping plates, and a pressure plate. The two clamping plates are detachably fixed to the support platform. The battery pack is placed on the support platform, with its two long sides resting against the two clamping plates. A drive mechanism then lowers the pressure plate, placing it against the upper surface of the battery pack, thereby limiting its deformability.

[0004] Currently, battery packs come in a variety of specifications, and manufacturers need to change the specifications of the battery packs produced on the production line according to orders. However, the two clamps of the fixture are detachably fixed to the support platform. Therefore, the position of the two clamps needs to be manually adjusted every time the production line changes, which is a cumbersome operation. Utility Model Content

[0005] The purpose of this application is to provide a battery pack airtightness testing device to solve the technical problem of cumbersome operation of battery pack clamps in the prior art.

[0006] The battery pack airtightness testing device provided in this application includes a first clamping mechanism, a second clamping mechanism, a drive assembly, a lifting assembly, a mounting component, and a clamping component;

[0007] The first clamping mechanism and the second clamping mechanism are arranged opposite to each other, and both the first clamping mechanism and the second clamping mechanism are slidably connected to the mounting component;

[0008] The drive assembly can drive the first clamping mechanism and the second clamping mechanism to move closer or further apart from each other, so that the first clamping mechanism and the second clamping mechanism cooperate to clamp the battery pack.

[0009] The lifting assembly can move the clamping member up and down so that the clamping member approaches the top surface of the battery pack located between the first clamping mechanism and the second clamping mechanism from above.

[0010] After the battery pack is placed directly below the clamping member, the drive assembly moves the first and second clamping mechanisms closer together, allowing them to clamp the battery pack. Then, the lifting assembly lowers the clamping member, bringing it closer from above to the top surface of the battery pack located between the first and second clamping mechanisms, thus limiting the battery pack's deformability. Because the first and second clamping mechanisms can move closer or further apart under the drive assembly, and the distance between them is adjustable, the battery pack airtightness testing device can test battery packs of various sizes. Adjusting the distance between the first and second clamping mechanisms via the drive assembly is convenient, reducing the amount of manual adjustment required and thus simplifying the operation.

[0011] Furthermore, the first clamping mechanism includes a first transmission assembly and a first clamping member, the first clamping member being connected to the drive assembly via the first transmission assembly;

[0012] The first transmission assembly includes a first driving member and a first driven member; the first driving member and the first driven member are connected by at least one first elastic telescopic member, and the first driven member is fixedly connected to a first clamping member;

[0013] The second clamping mechanism includes a second transmission assembly and a second clamping member, the second clamping member being connected to the drive assembly via the second transmission assembly;

[0014] The second transmission assembly includes a second driving member and a second driven member; the second driving member and the second driven member are connected by at least one second elastic telescopic member, and the second driven member is fixedly connected to the second clamping member;

[0015] The first driving member, the first driven member, the second driving member, and the second driven member are all slidably mounted on the mounting component;

[0016] Both the first and second active components are connected to the drive assembly, which can drive the first and second active components to move closer or further apart, thereby causing the first and second clamping components to move closer or further apart.

[0017] The first active member and the first driven member are connected by at least one first elastic telescopic member. The first elastic telescopic member is extendable and retractable, and can also return to its original position. When the first clamping member is not in contact with the side wall of the battery pack, the first elastic telescopic member is in a retracted state. As the first active member slides towards the second active member, after the first clamping member abuts against the side wall of the battery pack, the first elastic telescopic member gradually extends as the first active member continues to slide towards the second active member. The pressure exerted by the first clamping member on the battery pack gradually increases. When the pressure exerted by the first clamping member on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the first and second clamping members. The first elastic telescopic member buffers the pressure of the first clamping member on the battery pack, preventing the first clamping member from forcefully pushing the battery pack, thereby protecting the battery pack. The second active member and the second driven member are connected by at least one second elastic telescopic member. The second elastic telescopic member is extendable and retractable, and can also return to its original position. When the second clamping member is not in contact with the side wall of the battery pack, the second elastic telescopic member is in a retracted state. As the second active member slides towards the first active member, after the second clamping member abuts against the side wall of the battery pack, the second elastic telescopic member gradually extends as the second active member continues to slide towards the first active member. The pressure exerted by the second clamping member on the battery pack gradually increases. When the pressure exerted by the second clamping member on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the first and second clamping members. The second elastic telescopic member buffers the pressure of the second clamping member on the battery pack, preventing the second clamping member from forcefully pushing the battery pack, thereby protecting the battery pack.

[0018] Furthermore, the first elastic telescopic member is a first cylinder, the telescopic end of the first cylinder is fixedly connected to the first driven member, and the fixed end of the first cylinder is fixedly connected to the first driving member; the second elastic telescopic member is a second cylinder, the telescopic end of the second cylinder is fixedly connected to the second driven member, and the fixed end of the second cylinder is fixedly connected to the second driving member.

[0019] When the first clamping member is not in contact with the side wall of the battery pack, the first cylinder is in a retracted state. As the first driving member slides towards the second driving member, after the first clamping member rests against the side wall of the battery pack, the first cylinder gradually extends as the first driving member continues to slide towards the second driving member. The pressure applied to the battery pack by the first clamping member gradually increases. When the pressure applied to the battery pack by the first clamping member reaches a preset value, it means that the battery pack is clamped in place by the first and second clamping members. The first cylinder buffers the pressure of the first clamping member on the battery pack, preventing the first clamping member from forcefully pushing the battery pack, thereby protecting the battery pack. When the second clamping member is not in contact with the side wall of the battery pack, the second cylinder is in a retracted state. As the second driving member slides towards the first driving member, after the second clamping member abuts against the side wall of the battery pack, the second cylinder gradually extends as the second driving member continues to slide towards the first driving member. The pressure applied to the battery pack by the second clamping member gradually increases. When the pressure applied to the battery pack by the second clamping member reaches a preset value, it means that the battery pack is clamped in place by the second clamping member and the first clamping member. The second cylinder is designed to buffer the pressure of the second clamping member on the battery pack, preventing the second clamping member from forcefully pushing the battery pack, thereby protecting the battery pack.

[0020] Alternatively; the first elastic telescopic member is a first spring, with both ends of the first spring fixedly connected to the first driven member and the first driving member respectively; the second elastic telescopic member is a second spring, with both ends of the second spring fixedly connected to the second driven member and the second driving member respectively.

[0021] When the first clamping member is not in contact with the side wall of the battery pack, the first spring is in its initial state. As the first active member slides towards the second active member, after the first clamping member rests against the side wall of the battery pack, the first spring gradually extends as the first active member continues to slide towards the second active member. The pressure exerted by the first clamping member on the battery pack gradually increases. When the pressure exerted by the first clamping member on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the first and second clamping members. The first spring buffers the pressure of the first clamping member on the battery pack, preventing the first clamping member from forcefully pushing the battery pack, thereby protecting the battery pack. When the second clamping member is not in contact with the side wall of the battery pack, the second spring is in its initial state. As the second driving member slides towards the first driving member, and after the second clamping member comes into contact with the side wall of the battery pack, the second spring gradually extends as the second driving member continues to slide towards the first driving member. The pressure exerted by the second clamping member on the battery pack gradually increases. When the pressure exerted by the second clamping member on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the second clamping member and the first clamping member. The second spring buffers the pressure of the second clamping member on the battery pack, preventing the second clamping member from pushing the battery pack forcefully, thus protecting the battery pack.

[0022] Furthermore, the first driven member is rotatably connected to the first driving member, and the first driven member can drive the first clamping member to rotate toward the side wall of the battery pack so that the first clamping member fits against the side wall of the battery pack.

[0023] The second driven member is rotatably connected to the second driving member. The second driven member can drive the second clamping member to rotate toward the side wall of the battery pack so that the second clamping member fits against the side wall of the battery pack.

[0024] Since the first driven member is rotatably connected to the first driving member, and the second driven member is rotatably connected to the second driving member, the first clamping member and the second clamping member can adaptably abut against the side wall of the battery pack, thereby accurately clamping the battery pack.

[0025] Furthermore, the first transmission assembly also includes a first sliding member and a second sliding member;

[0026] One end of the first active member is connected to the first sliding member via a first elastic telescopic member, and the other end of the first active member is connected to the second sliding member via another first elastic telescopic member; both the first and second sliding members are slidably connected to the mounting member.

[0027] One end of the first follower is rotatably connected to the first slider, and the other end of the first follower is provided with a first waist-shaped groove. The second slider is provided with a first follower, which extends into the first waist-shaped groove and can move along the extension direction of the first waist-shaped groove.

[0028] The second transmission assembly also includes a third sliding member and a fourth sliding member;

[0029] One end of the second active member is connected to the third sliding member via a second elastic telescopic member, and the other end of the second active member is connected to the fourth sliding member via another second elastic telescopic member; both the third and fourth sliding members are slidably connected to the mounting member.

[0030] One end of the second follower is rotatably connected to the third slider, and the other end of the second follower is provided with a second waist-shaped groove. The fourth slider is provided with a second follower, which extends into the second waist-shaped groove and can move along the extension direction of the second waist-shaped groove.

[0031] As the first active member continues to apply tension to the first driven member, the first driven member rotates about the first pivot axis. The first waist-shaped groove rotates relative to the first follower, allowing the first follower to move along the extension direction of the first waist-shaped groove. This changes the position of the first follower within the first waist-shaped groove, causing the first clamping member to rotate to a position abutting against the side wall of the battery pack and continuing to apply thrust to the battery pack. As the second active member continues to apply tension to the second driven member, the second driven member rotates about the second pivot axis. The second waist-shaped groove rotates relative to the second follower, allowing the second follower to move along the extension direction of the second waist-shaped groove. This changes the position of the second follower within the second waist-shaped groove, causing the second clamping member to rotate to a position abutting against the side wall of the battery pack and continuing to apply thrust to the battery pack. Because the first driven member is rotatably connected to the first active member, and the second driven member is rotatably connected to the second active member, the first and second clamping members can adaptively abut against the side wall of the battery pack, thereby accurately clamping the battery pack.

[0032] Furthermore, the second sliding member is provided with a first top limiting member and a first bottom limiting member; the first top limiting member abuts against the top surface of the first driven member, and the first bottom limiting member abuts against the bottom surface of the first driven member;

[0033] The fourth sliding member is provided with a second top limiting member and a second bottom limiting member. The second top limiting member abuts against the top surface of the second driven member, and the second bottom limiting member abuts against the bottom surface of the second driven member.

[0034] Since the waist-shaped groove of the first follower only rests on the second slider, a first top limiting member is provided at the top of the first follower, and a first bottom limiting member is provided at the bottom of the first follower. The first top limiting member and the first bottom limiting member can cooperate to restrict the degree of freedom of the first follower in the vertical direction, preventing the first follower from falling off the second slider. Since the waist-shaped groove of the second follower only rests on the fourth slider, a second top limiting member is provided at the top of the second follower, and a second bottom limiting member is provided at the bottom of the second follower. The second top limiting member and the second bottom limiting member can cooperate to restrict the degree of freedom of the second follower in the vertical direction, preventing the second follower from falling off the fourth slider.

[0035] Furthermore, the first transmission assembly also includes a fifth sliding member;

[0036] The first driving member is connected to the fifth sliding member through the first elastic telescopic member, and the fifth sliding member is slidably mounted on the mounting member; the middle part of the first driven member is rotatably connected to the fifth sliding member;

[0037] The second transmission assembly also includes a sixth sliding element;

[0038] The second driving member is connected to the sixth sliding member via the second elastic telescopic member, and the sixth sliding member is slidably mounted on the mounting member; the middle part of the second driven member is rotatably connected to the sixth sliding member.

[0039] When the first clamping member is against the battery pack, if the side wall of the battery pack and the end face of the first clamping member facing the battery pack are not parallel, one end of the first clamping member along the second direction will abut against the battery pack, while a gap exists between the second end and the battery pack. As the first driving member continues to apply a pulling force to the first driven member, the first driven member rotates around the first pivot, causing the first clamping member to rotate to a position abutting against the side wall of the battery pack, and continues to apply a pushing force to the battery pack. When the second clamping member is against the battery pack, if the side wall of the battery pack and the end face of the second clamping member facing the battery pack are not parallel, one end of the second clamping member along the second direction will abut against the battery pack, while a gap exists between the second end and the battery pack. As the second driving member continues to apply a pulling force to the second driven member, the second driven member rotates around the second pivot, causing the second clamping member to rotate to a position abutting against the side wall of the battery pack, and continues to apply a pushing force to the battery pack.

[0040] Furthermore, the first driving member, the first driven member, the second driving member, and the second driven member are all positioned above the clamping member;

[0041] The first driven member and the first clamping member are fixedly connected by the first connecting member, and the second driven member and the second clamping member are fixedly connected by the second connecting member;

[0042] One end of the clamping member is provided with a first clearance groove to avoid the movement path of the first connecting member, and the other end of the clamping member is provided with a second clearance groove to avoid the movement path of the second connecting member.

[0043] When the first clamping member and the second clamping member move toward or away from each other in the first direction, the clamping member will interfere with the first connecting member and the second connecting member. Therefore, a first clearance groove and a second clearance groove are provided. When the first clamping member and the second clamping member move toward or away from each other in the first direction, the first connecting member can slide along the first clearance groove and the second connecting member can slide along the second clearance groove to ensure the normal movement of the first clamping member and the second clamping member.

[0044] Furthermore, the clamping component is fixedly connected to the bottom surface of the mounting component, and the lifting end of the lifting assembly is connected to the mounting component, enabling the lifting assembly to lift the mounting component.

[0045] The clamping component rises and falls simultaneously with the installation component, making it less likely for the lifting assembly and the installation component to interfere with each other, thus increasing the reliability of the equipment operation.

[0046] Furthermore, the battery pack airtightness testing device also includes a bracket, and the lifting assembly includes a drive mechanism, a lifting component, and a slide.

[0047] The drive mechanism is mounted on the bracket, the mounting component is slidably mounted on the bracket in the vertical direction, the slide block is slidably mounted on the bracket in the horizontal direction, the lifting component is fixedly connected to the mounting component, and the lifting component is provided with a guide groove, the extension direction of the guide groove is inclined to the horizontal direction;

[0048] The slide has a guide at its end, which extends into the guide groove; the drive end of the drive mechanism is connected to the slide, and the drive mechanism can drive the slide to slide in the horizontal direction so that the guide slides along the guide groove.

[0049] When the drive mechanism is running, the drive mechanism drives the slide to slide horizontally relative to the bracket. The slide drives the guide to move horizontally. At this time, the guide moves relative to the lifting member, causing the guide to slide along the guide groove. When the guide slides along the guide groove to the top of the guide groove, the lifting member slides downward. When the guide slides along the guide groove to the bottom of the guide groove, the lifting member slides up and down, thereby realizing the lifting of the lifting member.

[0050] Furthermore, the drive components include a motor and a lead screw;

[0051] The lead screw is rotatably mounted on the mounting component via a bearing housing. A motor is used to drive the lead screw to rotate about its own axis. The lead screw includes a first threaded section and a second threaded section with opposite directions of rotation.

[0052] The first driving component is threadedly connected to the first threaded section, and the second driving component is threadedly connected to the second threaded section;

[0053] The thread cross-sections of both the first and second thread segments are trapezoidal.

[0054] By setting the first and second threaded sections with opposite directions of rotation, the first and second driving components can move closer or further away synchronously, thereby causing the first and second clamping components to move closer or further away synchronously, resulting in better synchronization between the first and second clamping components. The thread cross-sections of both the first and second threaded sections are trapezoidal, which increases their locking capacity and prevents the lead screw from rotating under the reaction force of the battery pack. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0056] Figure 1 This is a diagram showing the usage status of the battery pack airtightness testing device provided in the embodiments of this application;

[0057] Figure 2 This is a schematic diagram of the structure of the battery pack airtightness testing device provided in the embodiments of this application;

[0058] Figure 3 This is a schematic diagram of the lifting assembly of the battery pack airtightness testing device provided in the embodiments of this application;

[0059] Figure 4 This is a schematic diagram of the structure of the first clamping mechanism and the second clamping mechanism of the lifting assembly of the battery pack airtightness testing device provided in the embodiments of this application;

[0060] Figure 5 This is a perspective view of the first clamping mechanism and the second clamping mechanism of the lifting assembly of the battery pack airtightness testing device provided in the embodiments of this application;

[0061] Figure 6 This is a schematic diagram of the structure of the first clamping mechanism of the lifting assembly of the battery pack airtightness testing device provided in the embodiments of this application;

[0062] Figure 7 This is a partial cross-sectional view of the first clamping mechanism of the lifting assembly of the battery pack airtightness testing device provided in the embodiments of this application;

[0063] Figure 8 This is a schematic diagram of the clamping component of the battery pack airtightness testing device provided in the embodiments of this application.

[0064] Icons: 1-First clamping mechanism; 11-First clamping member; 12-First driving member; 13-First driven member; 131-First top mounting plate; 132-First bottom mounting plate; 133-First waist-shaped groove; 14-First cylinder; 15-First sliding member; 16-Second sliding member; 161-First follower member; 17-First top limiting member; 18-First bottom limiting member; 19-First connecting member; 2-Second clamping mechanism; 21-Second clamp 22-Second driving component; 23-Second driven component; 24-Second cylinder; 25-Second connecting component; 3-Drive assembly; 31-Motor; 32-Screw; 4-Lifting assembly; 41-Lifting component; 411-Guide groove; 42-Slide block; 43-Drive mechanism; 44-Guide component; 5-Mounting component; 6-Clamping component; 61-First clearance groove; 62-Second clearance groove; 7-Bracket; 71-Placement beam; 8-Bearing platform; 9-AGV trolley. Detailed Implementation

[0065] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] This application provides a battery pack airtightness testing device. Several embodiments are given below to describe the battery pack airtightness testing device provided in this application in detail.

[0067] The battery pack airtightness testing device provided in this embodiment, such as Figure 1 As shown, the battery pack airtightness testing device includes a first clamping mechanism 1, a second clamping mechanism 2, a drive assembly 3, a lifting assembly 4, a mounting component 5, and a clamping component 6. The first clamping mechanism 1 and the second clamping mechanism 2 are arranged opposite to each other, and both the first clamping mechanism 1 and the second clamping mechanism 2 are slidably connected to the mounting component 5. The drive assembly 3 can drive the first clamping mechanism 1 and the second clamping mechanism 2 to move closer to each other or further away, so that the first clamping mechanism 1 and the second clamping mechanism 2 cooperate to clamp the battery pack. The lifting assembly 4 can drive the clamping component 6 to move up and down, so that the clamping component 6 approaches the top surface of the battery pack located between the first clamping mechanism 1 and the second clamping mechanism 2 from above.

[0068] During the battery pack airtightness test, the battery pack needs to be placed on the support platform 8, directly below the clamping member 6. Specifically, after the previous process places the battery pack on the support platform 8, an AGV trolley 9 can be used to lift the battery pack and the support platform 8 and transport them to... Figure 1 At the position shown, the battery pack is directly below the clamping member 6. Then, the AGV trolley 9 lowers the carrier platform 8 and places it on the placement beam 71 at the bottom of the bracket 7. The AGV trolley 9 can then leave to receive new battery packs and carrier platforms 8 and deliver them to other equipment.

[0069] AGV is short for Automated Guided Vehicle. The Chinese name for the AGV trolley 9 is automatic guide vehicle, also known as automatic guided transport vehicle or automatic guided transport vehicle. It should be noted that the AGV trolley 9 comes in various forms. Some AGV trolley 9s can cross the placement beam 71 when moving. If the AGV trolley 9 used in actual production cannot cross the placement beam 71, the placement beam 71 can be removed without affecting the overall strength of the support 7 of this application. The support platform 8 transported by the AGV trolley 9 can be placed directly on the ground where the support 7 is located.

[0070] Along the first direction, the first clamping mechanism 1 and the second clamping mechanism 2 are arranged opposite to each other. The first clamping mechanism 1 can slide relative to the mounting member 5 along the first direction, and the second clamping mechanism can slide relative to the mounting member 5 along the first direction. Under the drive of the drive assembly 3, the first clamping mechanism 1 and the second clamping mechanism 2 can move closer to or further away from each other along the first direction.

[0071] First direction such as Figure 1 The direction indicated by the middle arrow ab. The second direction is perpendicular to the first direction, and both the second and first directions are set in a horizontal direction. The second direction is as follows: Figure 1 The direction indicated by the middle arrow cd.

[0072] The number of first clamping mechanisms 1 can be one or more. When the number of first clamping mechanisms 1 is more than one, the multiple first clamping mechanisms 1 are arranged sequentially along the second direction.

[0073] The number of second clamping mechanisms 2 can be one or more. When there are multiple second clamping mechanisms 2, the multiple second clamping mechanisms 2 are arranged sequentially along the second direction.

[0074] After the battery pack is placed directly below the clamping member 6, the drive assembly 3 drives the first clamping mechanism 1 and the second clamping mechanism 2 to move closer together, so that the first clamping mechanism 1 and the second clamping mechanism 2 cooperate to clamp the battery pack. Then, the lifting assembly 4 drives the clamping member 6 to descend, so that the clamping member 6 approaches the top surface of the battery pack located between the first clamping mechanism 1 and the second clamping mechanism 2 from above, thereby limiting the deformation of the battery pack. Since the first clamping mechanism 1 and the second clamping mechanism 2 can move closer or further apart under the drive assembly 3, the distance between the first clamping mechanism 1 and the second clamping mechanism 2 can be adjusted, allowing the battery pack airtightness testing device to test battery packs of various sizes. The method of adjusting the distance between the first clamping mechanism 1 and the second clamping mechanism 2 through the drive assembly 3 is relatively convenient, which can reduce the amount of manual adjustment of the position of the first clamping mechanism 1 and the second clamping mechanism 2, thereby reducing the cumbersomeness of operation.

[0075] It should be noted that, in order to prevent the clamping part 6 from damaging the battery pack, when the battery pack airtightness testing device clamps the battery pack, a gap of 1mm-2mm needs to be reserved between the clamping part 6 and the top surface of the battery pack to allow the battery pack some space for upward deformation.

[0076] Furthermore, such as Figures 4 to 6As shown, the first clamping mechanism 1 includes a first transmission assembly and a first clamping member 11, the first clamping member 11 being connected to the drive assembly 3 via the first transmission assembly; the first transmission assembly includes a first driving member 12 and a first driven member 13; the first driving member 12 and the first driven member 13 are connected via at least one first elastic telescopic member, and the first driven member 13 is fixedly connected to the first clamping member 11; the second clamping mechanism 2 includes a second transmission assembly and a second clamping member 21, the second clamping member 21 being connected to the drive assembly 3 via the second transmission assembly; the second transmission assembly includes a second driving member. 22 and second driven member 23; the second driving member 22 and the second driven member 23 are connected by at least one second elastic telescopic member, and the second driven member 23 is fixedly connected to the second clamping member 21; the first driving member 12, the first driven member 13, the second driving member 22 and the second driven member 23 are all slidably mounted on the mounting member 5; the first driving member 12 and the second driving member 22 are both connected to the driving assembly 3, and the driving assembly 3 can drive the first driving member 12 and the second driving member 22 to move closer or further away from each other, so as to drive the first clamping member 11 and the second clamping member 21 to move closer or further away from each other.

[0077] The first driving member 12, the first driven member 13, the second driving member 22, and the second driven member 23 are all slidably mounted on the mounting member 5, and the first driving member 12, the first driven member 13, the second driving member 22, and the second driven member 23 are all able to slide relative to the mounting member 5 along the first direction.

[0078] The first active member 12 is connected to the drive assembly 3. The drive assembly 3 drives the first active member 12 to slide towards the second active member 22 along the first direction. The first active member 12 drives the first clamping member 11 to slide towards the second active member 22 along the first direction. The second active member 22 is connected to the drive assembly 3. The drive assembly 3 drives the second active member 22 to slide towards the first active member 12 along the first direction. The second active member 22 drives the second clamping member 21 to slide towards the first active member 12 along the first direction. This causes the first clamping member 11 and the second clamping member 21 to move closer or further apart from each other, so that the first clamping member 11 and the second clamping member 21 cooperate to clamp the battery pack.

[0079] The first active member 12 and the first driven member 13 are connected by at least one first elastic telescopic member. The first elastic telescopic member is extendable and retractable, and can also return to its original position. When the first clamping member 11 is not in contact with the side wall of the battery pack, the first elastic telescopic member is in a retracted state. As the first active member 12 slides toward the second active member 22, after the first clamping member 11 abuts against the side wall of the battery pack, the first elastic telescopic member gradually extends as the first active member 12 continues to slide toward the second active member 22. The pressure applied to the battery pack by the first clamping member 11 gradually increases. When the pressure applied to the battery pack by the first clamping member 11 reaches a preset value, it means that the battery pack is clamped in place by the first clamping member 11 and the second clamping member 21. The first elastic telescopic member can buffer the pressure of the first clamping member 11 on the battery pack, preventing the first clamping member 11 from pushing the battery pack hard, thereby protecting the battery pack.

[0080] The pressure exerted on the battery pack by the first clamping member 11 can be detected by a pressure sensor, and a pressure sensor can be installed on the first clamping member 11.

[0081] The number of first elastic expansion members can be one or more. When there are multiple first elastic expansion members, they are spaced apart along a second direction, which is perpendicular to the first direction, and both the second and first directions are horizontal. The second direction is as follows: Figure 1 The direction indicated by the middle arrow cd. For example, there are two first elastic telescopic members, one of which is located at one end of the first active member 12 and the first driven member 13 along the second direction, and the other is located at the other end of the first active member 12 and the first driven member 13 along the second direction.

[0082] The first elastic telescopic member can extend and retract along a first direction. For example... Figure 5 As shown, along the first direction, the first driving member 12 is located on the side of the first driven member 13 facing the second driving member 22.

[0083] The second active member 22 and the second driven member 23 are connected by at least one second elastic telescopic member. The second elastic telescopic member is extendable and retractable, and can also return to its original position. When the second clamping member 21 is not in contact with the side wall of the battery pack, the second elastic telescopic member is in a retracted state. As the second active member 22 slides toward the first active member 12, after the second clamping member 21 abuts against the side wall of the battery pack, the second elastic telescopic member gradually extends as the second active member 22 continues to slide toward the first active member 12. The pressure exerted by the second clamping member 21 on the battery pack gradually increases. When the pressure exerted by the second clamping member 21 on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the first clamping member 11 and the second clamping member 21. The second elastic telescopic member buffers the pressure of the second clamping member 21 on the battery pack, preventing the second clamping member 21 from forcefully pushing the battery pack, thereby protecting the battery pack.

[0084] The pressure exerted on the battery pack by the second clamping member 21 can be detected by a pressure sensor, and a pressure sensor can be installed on the second clamping member 21.

[0085] The number of second elastic telescopic members can be one or more. When there are multiple second elastic telescopic members, they are spaced apart along the second direction. For example, there are two second elastic telescopic members, one of which is located at one end of the second driving member 22 and the second driven member 23 along the second direction, and the other is located at the other end of the second driving member 22 and the second driven member 23 along the second direction.

[0086] The second elastic telescopic component can extend and retract along the first direction. For example... Figure 5 As shown, along the first direction, the second driving member 22 is located on the side of the second driven member 23 facing the first driving member 12.

[0087] In one alternative implementation, such as Figure 6 As shown, the first elastic telescopic member is the first cylinder 14, the telescopic end of the first cylinder 14 is fixedly connected to the first driven member 13, and the fixed end of the first cylinder 14 is fixedly connected to the first driving member 12. The second elastic telescopic member is the second cylinder 24, the telescopic end of the second cylinder 24 is fixedly connected to the second driven member 23, and the fixed end of the second cylinder 24 is fixedly connected to the second driving member 22.

[0088] The first cylinder 14 is capable of extending and retracting in a first direction. The extension end of the first cylinder 14 is fixedly connected to the first driven member 13, and the fixed end of the first cylinder 14 is fixedly connected to the first driving member 12. The fixed connection can be achieved by any suitable method such as bolt fixing, bonding, or welding.

[0089] The second cylinder 24 can extend and retract in the first direction. The extension end of the second cylinder 24 is fixedly connected to the second driven member 23, and the fixed end of the second cylinder 24 is fixedly connected to the second driving member 22. The fixed connection can be any suitable method such as bolt fixing, bonding or welding.

[0090] When the first clamping member 11 is not in contact with the side wall of the battery pack, the first cylinder 14 is in a retracted state. As the first active member 12 slides toward the second active member 22, after the first clamping member 11 abuts against the side wall of the battery pack, the first cylinder 14 gradually extends as the first active member 12 continues to slide toward the second active member 22. The pressure applied by the first clamping member 11 to the battery pack gradually increases. When the pressure applied by the first clamping member 11 to the battery pack reaches a preset value, it means that the battery pack is clamped in place by the first clamping member 11 and the second clamping member 21. The first cylinder 14 buffers the pressure of the first clamping member 11 on the battery pack, so that the thrust applied by the first clamping member 11 to the battery pack is in a real-time floating state, avoiding the first clamping member 11 from forcefully pushing the battery pack, thereby protecting the battery pack.

[0091] When the second clamping member 21 is not in contact with the side wall of the battery pack, the second cylinder 24 is in a retracted state. As the second active member 22 slides towards the first active member 12, it must first overcome the pulling force applied by the second cylinder 24 before it can slide forward. The telescopic rod of the second cylinder 24 is gradually extended, causing the second active member 22 to gradually approach the first active member 12. The pressure applied to the battery pack by the second clamping member 21 gradually increases. After the second clamping member 21 abuts against the side wall of the battery pack, as the second active member 22 continues to slide towards the first active member 12, when the pressure applied to the battery pack by the second clamping member 21 reaches a preset value, it means that the battery pack is clamped in place by the second clamping member 21 and the first clamping member 11. The second cylinder 24 is designed to buffer the pressure of the second clamping member 21 on the battery pack, preventing the second clamping member 21 from forcefully pushing the battery pack, thus protecting the battery pack.

[0092] In another alternative embodiment, the first elastic telescopic member is a first spring, with its two ends fixedly connected to the first driven member 13 and the first driving member 12, respectively. The second elastic telescopic member is a second spring, with its two ends fixedly connected to the second driven member 23 and the second driving member 22, respectively.

[0093] The first spring is capable of extending and retracting in a first direction. The two ends of the first spring are fixedly connected to the first driven member 13 and the first driving member 12, respectively. The fixed connection can be any suitable method such as bonding or welding.

[0094] The second spring can extend and retract in the first direction. The two ends of the second spring are fixedly connected to the second driven member 23 and the second driving member 22, respectively. The fixed connection can be any suitable method such as bonding or welding.

[0095] When the first clamping member 11 is not in contact with the side wall of the battery pack, the first spring is in its initial state. As the first active member 12 slides toward the second active member 22, after the first clamping member 11 abuts against the side wall of the battery pack, the first spring gradually extends as the first active member 12 continues to slide toward the second active member 22. The pressure exerted by the first clamping member 11 on the battery pack gradually increases. When the pressure exerted by the first clamping member 11 on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the first clamping member 11 and the second clamping member 21. The first spring buffers the pressure of the first clamping member 11 on the battery pack, preventing the first clamping member 11 from pushing the battery pack hard, thereby protecting the battery pack.

[0096] When the second clamping member 21 is not in contact with the side wall of the battery pack, the second spring is in its initial state. As the second active member 22 slides towards the first active member 12, after the second clamping member 21 rests against the side wall of the battery pack, the second spring gradually extends as the second active member 22 continues to slide towards the first active member 12. The pressure exerted by the second clamping member 21 on the battery pack gradually increases. When the pressure exerted by the second clamping member 21 on the battery pack reaches a preset value, it means that the battery pack is clamped in place by the second clamping member 21 and the first clamping member 11. The second spring buffers the pressure of the second clamping member 21 on the battery pack, preventing the second clamping member 21 from pushing the battery pack hard, thereby protecting the battery pack.

[0097] Furthermore, such as Figure 6 As shown, the first driven member 13 is rotatably connected to the first driving member 12. The first driven member 13 can drive the first clamping member 11 to rotate toward the side wall of the battery pack so that the first clamping member 11 fits against the side wall of the battery pack. The second driven member 23 is rotatably connected to the second driving member 22. The second driven member 23 can drive the second clamping member 21 to rotate toward the side wall of the battery pack so that the second clamping member 21 fits against the side wall of the battery pack.

[0098] The first driven member 13 is rotatably connected to the first driving member 12. The first driven member 13 can rotate around the first rotating shaft, which is arranged in the vertical direction. The second driven member 23 is rotatably connected to the second driving member 22. The second driven member 23 can rotate around the second rotating shaft, which is arranged in the vertical direction.

[0099] When the first clamping member 11 is against the battery pack, if the side wall of the battery pack and the end face of the first clamping member 11 facing the battery pack are not parallel, one end of the first clamping member 11 along the second direction will abut against the battery pack, while there is a gap between the other end of the first clamping member 11 along the second direction and the battery pack. As the first driving member 12 continues to apply a pulling force to the first driven member 13, the first driven member 13 rotates relative to the first driving member 12. The first driven member 13 drives the first clamping member 11 to rotate towards the side wall of the battery pack, so that the first clamping member 11 rotates to a position abutting against the side wall of the battery pack, and continues to apply a pushing force to the battery pack.

[0100] When the second clamping member 21 is against the battery pack, if the side wall of the battery pack and the end face of the second clamping member 21 facing the battery pack are not parallel, one end of the second clamping member 21 along the second direction will abut against the battery pack, while there is a gap between the other end of the second clamping member 21 along the second direction and the battery pack. As the second driving member 22 continues to apply a pulling force to the second driven member 23, the second driven member 23 rotates relative to the second driving member 22. The second driven member 23 drives the second clamping member 21 to rotate towards the side wall of the battery pack, so that the second clamping member 21 rotates to a position abutting against the side wall of the battery pack, and continues to apply a pushing force to the battery pack.

[0101] Since the first driven member 13 is rotatably connected to the first driving member 12, and the second driven member 23 is rotatably connected to the second driving member 22, the first clamping member 11 and the second clamping member 21 can adaptively abut against the side wall of the battery pack, thereby accurately clamping the battery pack.

[0102] In one alternative implementation, such as Figure 6As shown, the first transmission assembly also includes a first sliding member 15 and a second sliding member 16; one end of the first driving member 12 is connected to the first sliding member 15 via a first elastic telescopic member, and the other end of the first driving member 12 is connected to the second sliding member 16 via another first elastic telescopic member; both the first sliding member 15 and the second sliding member 16 are slidably connected to the mounting member 5; one end of the first driven member 13 is rotatably connected to the first sliding member 15, and the other end of the first driven member 13 is provided with a first waist-shaped groove 133; the second sliding member 16 is provided with a first follower member 161, which extends into the first waist-shaped groove 133 and can move along the first waist-shaped groove. The extension direction of 133 moves; the second transmission assembly also includes a third sliding member 25 and a fourth sliding member 26; one end of the second driving member 22 is connected to the third sliding member 25 through a second elastic telescopic member, and the other end of the second driving member 22 is connected to the fourth sliding member 26 through another second elastic telescopic member; both the third sliding member 25 and the fourth sliding member 26 are slidably connected to the mounting member 5; one end of the second driven member 23 is rotatably connected to the third sliding member 25, and the other end of the second driven member 23 is provided with a second waist-shaped groove; the fourth sliding member 26 is provided with a second follower member, the second follower member extends into the second waist-shaped groove, and the second follower member can move along the extension direction of the second waist-shaped groove.

[0103] One end of the first elastic telescopic member is fixedly connected to the first active member 12, and the other end of the first elastic telescopic member is fixedly connected to the first sliding member 15. One end of the first driven member 13 is rotatably connected to the first sliding member 15, and the first driven member 13 can rotate around the first pivot. The outer contour of the first follower 161 can be wheel-shaped, making the outer contour of the first follower 161 relatively smooth, and the first follower 161 moves relatively smoothly along the first waist-shaped groove 133. The wheel-shaped first follower 161 can be rotatably connected to the second sliding member 16, and the first follower 161 can rotate around its own axis. The wheel-shaped first follower 161 can also be fixed to the second sliding member 16.

[0104] One end of the second elastic telescopic member is fixedly connected to the second driving member 22, and the other end of the second elastic telescopic member is fixedly connected to the second sliding member 16. One end of the second driven member 23 is rotatably connected to the second sliding member 16, and the second driven member 23 can rotate around the second pivot. The outer contour of the second follower can be wheel-shaped, making the outer contour of the second follower smoother and allowing it to move more smoothly along the second waist-shaped groove. The wheel-shaped second follower can be rotatably connected to the fourth sliding member 26, and the second follower can rotate around its own axis. The wheel-shaped second follower can also be fixed to the fourth sliding member 26.

[0105] Both the first slider 15 and the second slider 16 can slide relative to the mounting member 5 along the first direction.

[0106] When the first clamping member 11 is abutted against the battery pack, if the side wall of the battery pack and the end face of the first clamping member 11 facing the battery pack are not parallel, one end of the first clamping member 11 along the second direction will abut against the battery pack, while there is a gap between the other end of the first clamping member 11 along the second direction and the battery pack. As the first driving member 12 continues to apply a pulling force to the first driven member 13, the first driven member 13 rotates about the first pivot, and the first waist-shaped groove 133 rotates relative to the first follower 161. The first follower 161 can move along the extension direction of the first waist-shaped groove 133 to change the position of the first follower 161 within the first waist-shaped groove 133, thereby causing the first clamping member 11 to rotate to a position abutting against the side wall of the battery pack and continue to apply a pushing force to the battery pack.

[0107] When the second clamping member 21 is against the battery pack, if the side wall of the battery pack and the end face of the second clamping member 21 facing the battery pack are not parallel, one end of the second clamping member 21 along the second direction will abut against the battery pack, while there is a gap between the other end of the second clamping member 21 along the second direction and the battery pack. As the second driving member 22 continues to apply a pulling force to the second driven member 23, the second driven member 23 rotates about the second pivot, and the second waist-shaped groove rotates relative to the second follower. The second follower can move along the extension direction of the second waist-shaped groove to change the position of the second follower within the second waist-shaped groove, thereby causing the second clamping member 21 to rotate to a position against the side wall of the battery pack and continue to apply a pushing force to the battery pack.

[0108] Furthermore, such as Figure 7 As shown, the second sliding member 16 is provided with a first top limiting member 17 and a first bottom limiting member 18; the first top limiting member 17 abuts against the top surface of the first driven member 13, and the first bottom limiting member 18 abuts against the bottom surface of the first driven member 13; the fourth sliding member 26 is provided with a second top limiting member and a second bottom limiting member, the second top limiting member abuts against the top surface of the second driven member 23, and the second bottom limiting member abuts against the bottom surface of the second driven member 23.

[0109] Since the first waist-shaped groove 133 of the first follower 13 only rests on the second slider 16, a first top limiting member 17 is provided at the top of the first follower 13 and a first bottom limiting member 18 is provided at the bottom of the first follower 13. The first top limiting member 17 and the first bottom limiting member 18 can cooperate to restrict the degree of freedom of the first follower 13 in the vertical direction and prevent the first follower 13 from falling off the second slider 16.

[0110] The first top limiting member 17 can be a protrusion, a roller, or any other suitable form. The first bottom limiting member 18 can be a protrusion, a roller, or any other suitable form.

[0111] For example, a first top mounting plate 131 and a first bottom mounting plate 132 are fixedly provided on the second sliding member 16. The first top mounting plate 131 is located above the first driven member 13, and the first bottom mounting plate 132 is located below the first driven member 13. The first top limiting member 17 and the first bottom limiting member 18 are both rollers. The first top limiting member 17 is rotatably connected to the first top mounting plate 131 and can rotate around its own axis. The first bottom limiting member 18 is rotatably connected to the first bottom mounting plate 132 and can rotate around its own axis. Since the first top limiting member 17 and the first bottom limiting member 18 are both rollers, the friction between the first top limiting member 17 and the first bottom limiting member 18 and the first driven member 13 is small.

[0112] Since the second waist-shaped groove of the second follower 23 only rests on the fourth slider 26, a second top limiting member is provided at the top of the second follower 23 and a second bottom limiting member is provided at the bottom of the second follower 23. The second top limiting member and the second bottom limiting member can cooperate to restrict the degree of freedom of the second follower 23 in the vertical direction, preventing the second follower 23 from falling off the fourth slider 26.

[0113] The second top limiting member can be a protrusion, a roller, or any other suitable form. The second bottom limiting member can be a protrusion, a roller, or any other suitable form.

[0114] For example, a second top mounting plate and a second bottom mounting plate are fixedly provided on the fourth sliding member 26. The second top mounting plate is located above the second driven member 23, and the second bottom mounting plate is located below the second driven member 23. The second top limiting member and the second bottom limiting member are both rollers. The second top limiting member is rotatably connected to the second top mounting plate and can rotate around its own axis. The second bottom limiting member is rotatably connected to the second bottom mounting plate and can rotate around its own axis. Since the second top limiting member and the second bottom limiting member are both rollers, the friction between the second top limiting member and the second bottom limiting member and the second driven member 23 is relatively small.

[0115] In another alternative embodiment, the first transmission assembly further includes a fifth sliding member; the first driving member 12 is connected to the fifth sliding member via a first elastic telescopic member, and the fifth sliding member is slidably mounted on the mounting member 5; the middle part of the first driven member 13 is rotatably connected to the fifth sliding member; the second transmission assembly further includes a sixth sliding member; the second driving member 22 is connected to the sixth sliding member via a second elastic telescopic member, and the sixth sliding member is slidably mounted on the mounting member 5; the middle part of the second driven member 23 is rotatably connected to the sixth sliding member.

[0116] The fifth sliding member can slide along the first direction. One end of the first elastic telescopic member is fixedly connected to the first driving member 12, and the other end of the first elastic telescopic member is fixedly connected to the fifth sliding member. The first driven member 13 can rotate relative to the fifth sliding member about the first rotating axis, which is set in the vertical direction.

[0117] The sixth sliding member can slide along the first direction. One end of the second elastic telescopic member is fixedly connected to the second driving member 22, and the other end of the second elastic telescopic member is fixedly connected to the sixth sliding member. The second driven member 23 can rotate relative to the sixth sliding member about a second rotating axis, which is arranged in the vertical direction.

[0118] When the first clamping member 11 is against the battery pack, if the side wall of the battery pack and the end face of the first clamping member 11 facing the battery pack are not parallel, one end of the first clamping member 11 along the second direction will abut against the battery pack, while there is a gap between the other end of the first clamping member 11 along the second direction and the battery pack. As the first driving member 12 continues to apply a pulling force to the first driven member 13, the first driven member 13 rotates around the first pivot, causing the first clamping member 11 to rotate to a position against the side wall of the battery pack, and continues to apply a pushing force to the battery pack.

[0119] When the second clamping member 21 is against the battery pack, if the side wall of the battery pack and the end face of the second clamping member 21 facing the battery pack are not parallel, one end of the second clamping member 21 along the second direction will abut against the battery pack, while there is a gap between the other end of the second clamping member 21 along the second direction and the battery pack. As the second driving member 22 continues to apply a pulling force to the second driven member 23, the second driven member 23 rotates around the second pivot, causing the second clamping member 21 to rotate to a position abutting against the side wall of the battery pack, and continues to apply a pushing force to the battery pack.

[0120] Furthermore, such as Figure 8 As shown, the first driving member 12, the first driven member 13, the second driving member 22, and the second driven member 23 are all disposed above the clamping member 6; the first driven member 13 is fixedly connected to the first clamping member 11 through the first connecting member 19, and the second driven member 23 is fixedly connected to the second clamping member 21 through the second connecting member 25; one end of the clamping member 6 is provided with a first clearance groove 61 that avoids the movement path of the first connecting member 19, and the other end of the clamping member 6 is provided with a second clearance groove 62 that avoids the movement path of the second connecting member 25.

[0121] The first driven member 13 and the first clamping member 11 are fixedly connected by the first connecting member 19, so that the first clamping member 11 is positioned below the pressing member 6. The second driven member 23 and the second clamping member 21 are fixedly connected by the second connecting member 25, so that the second clamping member 21 is positioned below the pressing member 6.

[0122] To accommodate battery packs of different sizes, clamping member 6 needs to cover the upper surface of the battery pack. Therefore, clamping member 6 needs to be set according to the maximum size of the battery pack that the battery pack airtightness testing device can test.

[0123] When the first clamping member 11 and the second clamping member 21 move toward or away from each other along the first direction, the pressing member 6 will interfere with the first connecting member 19 and the second connecting member 25. Therefore, along the first direction, one end of the pressing member 6 is provided with a first clearance groove 61 to avoid the movement path of the first connecting member 19, and the other end of the pressing member 6 is provided with a second clearance groove 62 to avoid the movement path of the second connecting member 25. When the first clamping member 11 and the second clamping member 21 move toward or away from each other along the first direction, the first connecting member 19 can slide along the first clearance groove 61, and the second connecting member 25 can slide along the second clearance groove 62 to ensure the normal movement of the first clamping member 11 and the second clamping member 21.

[0124] The lifting assembly 4 can drive the pressing member 6 to rise and fall. In an optional embodiment, the lifting assembly 4 is fixedly connected to the pressing member 6. The lifting assembly 4 passes through the mounting member 5, and the pressing member 6 is disposed below the mounting member 5 so that the pressing member 6 can rise and fall below the mounting member 5.

[0125] In another alternative implementation, such as Figures 2 to 3 As shown, the clamping component 6 is fixedly connected to the bottom surface of the mounting component 5, and the lifting end of the lifting assembly 4 is connected to the mounting component 5. The lifting assembly 4 can drive the mounting component 5 to rise and fall.

[0126] The clamping component 6 is fixedly connected to the bottom surface of the mounting component 5, and the lifting end of the lifting assembly 4 is fixedly connected to the mounting component 5. When the lifting assembly 4 lifts, it drives the mounting component 5 to lift, and the mounting component 5 drives the clamping component 6 to lift, thereby realizing the lifting of the clamping component 6.

[0127] The clamping component 6 rises and falls simultaneously with the mounting component 5, making it less likely for the lifting assembly 4 and the mounting component 5 to interfere with each other, thus increasing the reliability of the equipment operation.

[0128] The lifting assembly 4 can be any suitable form, such as an electric push rod, a pneumatic cylinder, or a hydraulic cylinder.

[0129] Furthermore, such as Figures 2 to 3As shown, the battery pack airtightness testing device also includes a bracket 7, and the lifting assembly 4 includes a drive mechanism 43, a lifting component 41, and a slide 42. The drive mechanism 43 is mounted on the bracket 7, the mounting component 5 is slidably mounted on the bracket 7 in the vertical direction, the slide 42 is slidably mounted on the bracket 7 in the horizontal direction, the lifting component 41 is fixedly connected to the mounting component 5, and a guide groove 411 is provided on the lifting component 41. The extension direction of the guide groove 411 is inclined to the horizontal direction. A guide component 44 is provided at the end of the slide 42, and the guide component 44 extends into the guide groove 411. The drive end of the drive mechanism 43 is connected to the slide 42, and the drive mechanism 43 can drive the slide 42 to slide in the horizontal direction so that the guide component 44 slides along the guide groove 411.

[0130] The drive mechanism 43 can be a lead screw and nut mechanism, in which the lead screw of the lead screw and the slide 42 are threadedly connected to each other to drive the slide 42 to slide.

[0131] When the drive mechanism 43 is running, the drive mechanism 43 drives the slide 42 to slide horizontally relative to the bracket 7. The slide 42 drives the guide 44 to move horizontally. At this time, the guide 44 moves relative to the lifting member 41, so that the guide 44 slides along the guide groove 411. When the guide 44 slides along the guide groove 411 to the top of the guide groove 411, the lifting member 41 slides downward. The lifting member 41 drives the mounting member 5 to slide downward. When the guide 44 slides along the guide groove 411 to the bottom of the guide groove 411, the lifting member 41 slides upward. The lifting member 41 drives the mounting member 51 to slide upward, thereby realizing the lifting of the lifting member 41 and the mounting member 51.

[0132] The guide member 44 can be a roller, and is rotatably connected to the slide 42. The guide member 44 can rotate around its own axis to reduce the friction between the guide member 44 and the guide groove 411. The guide member 44 can be provided at one end of the slide 42, or it can be provided at both ends of the slide 42. The lifting member 41 is provided at both ends, so that the guide member 44 and the guide groove 411 are provided in a one-to-one correspondence.

[0133] The lifting component 41 is fixedly connected to the mounting component 5, and when the lifting component 41 is raised or lowered, it can drive the mounting component 5 to be raised or lowered.

[0134] The drive component 3 can be any suitable form, such as an electric actuator, a pneumatic cylinder, or a hydraulic cylinder.

[0135] Furthermore, the drive assembly 3 includes a motor 31 and a lead screw 32; the lead screw 32 is rotatably mounted on the mounting component 5 via a bearing seat, the motor 31 is used to drive the lead screw 32 to rotate around its own axis, the lead screw 32 includes a first threaded segment and a second threaded segment with opposite directions of rotation; the first driving member 12 is threadedly connected to the first threaded segment, and the second driving member 22 is threadedly connected to the second threaded segment; the thread cross sections of the first threaded segment and the second threaded segment are both trapezoidal.

[0136] When the motor 31 is running, the lead screw 32 rotates around its own axis. The first driving member 12 is threadedly connected to the first threaded section, and the second driving member 22 is threadedly connected to the second threaded section, so that the first driving member 12 moves toward the second driving member 22 in the first direction, and the second driving member 22 moves toward the first driving member 12 in the first direction.

[0137] By setting a first thread segment and a second thread segment with opposite directions of rotation, the first driving member 12 and the second driving member 22 can move closer or further away synchronously, thereby making the first clamping member 11 and the second clamping member 21 move closer or further away synchronously, thus improving the synchronization of the first clamping member 11 and the second clamping member 21.

[0138] The thread cross-sections of both the first and second threaded sections are trapezoidal, which increases the locking ability of the first and second threaded sections and prevents the lead screw 32 from rotating under the reaction force of the battery pack.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack airtightness testing device, characterized in that, The battery pack airtightness testing device includes a first clamping mechanism, a second clamping mechanism, a drive assembly, a lifting assembly, a mounting component, and a clamping component; The first clamping mechanism and the second clamping mechanism are arranged opposite to each other, and both the first clamping mechanism and the second clamping mechanism are slidably connected to the mounting component; The drive assembly can drive the first clamping mechanism and the second clamping mechanism to move closer or further apart from each other, so that the first clamping mechanism and the second clamping mechanism cooperate to clamp the battery pack; The lifting assembly can move the clamping member up and down so that the clamping member approaches the top surface of the battery pack located between the first clamping mechanism and the second clamping mechanism from above.

2. The battery pack airtightness testing device according to claim 1, characterized in that, The first clamping mechanism includes a first transmission assembly and a first clamping member, wherein the first clamping member is connected to the drive assembly through the first transmission assembly; The first transmission assembly includes a first driving member and a first driven member; the first driving member and the first driven member are connected by at least one first elastic telescopic member, and the first driven member is fixedly connected to the first clamping member; The second clamping mechanism includes a second transmission assembly and a second clamping member, wherein the second clamping member is connected to the drive assembly via the second transmission assembly; The second transmission assembly includes a second driving member and a second driven member; the second driving member and the second driven member are connected by at least one second elastic telescopic member, and the second driven member is fixedly connected to the second clamping member; The first driving member, the first driven member, the second driving member, and the second driven member are all slidably mounted on the mounting member; Both the first active member and the second active member are connected to the driving assembly. The driving assembly can drive the first active member and the second active member to move closer to or further away from each other, so as to drive the first clamping member and the second clamping member to move closer to or further away from each other.

3. The battery pack airtightness testing device according to claim 2, characterized in that, The first elastic telescopic member is a first cylinder, the telescopic end of the first cylinder is fixedly connected to the first driven member, and the fixed end of the first cylinder is fixedly connected to the first driving member. The second elastic telescopic member is a second cylinder, the telescopic end of the second cylinder is fixedly connected to the second driven member, and the fixed end of the second cylinder is fixedly connected to the second driving member. Alternatively; the first elastic telescopic member is a first spring, with both ends of the first spring fixedly connected to the first driven member and the first driving member respectively, and the second elastic telescopic member is a second spring, with both ends of the second spring fixedly connected to the second driven member and the second driving member respectively.

4. The battery pack airtightness testing device according to claim 2, characterized in that, The first driven member is rotatably connected to the first driving member. The first driven member can drive the first clamping member to rotate toward the side wall of the battery pack so that the first clamping member fits against the side wall of the battery pack. The second driven member is rotatably connected to the second driving member. The second driven member can drive the second clamping member to rotate toward the side wall of the battery pack so that the second clamping member fits against the side wall of the battery pack.

5. The battery pack airtightness testing device according to claim 4, characterized in that, The first transmission assembly further includes a first slider and a second slider; One end of the first active member is connected to the first sliding member via a first elastic telescopic member, and the other end of the first active member is connected to the second sliding member via another first elastic telescopic member; both the first sliding member and the second sliding member are slidably connected to the mounting member. One end of the first driven member is rotatably connected to the first sliding member, and the other end of the first driven member is provided with a first waist-shaped groove. The second sliding member is provided with a first follower member, which extends into the first waist-shaped groove and can move along the extension direction of the first waist-shaped groove. The second transmission assembly further includes a third slider and a fourth slider; One end of the second active member is connected to the third sliding member via a second elastic telescopic member, and the other end of the second active member is connected to the fourth sliding member via another second elastic telescopic member; both the third and fourth sliding members are slidably connected to the mounting member. One end of the second follower is rotatably connected to the third slider, and the other end of the second follower is provided with a second waist-shaped groove. The fourth slider is provided with a second follower, which extends into the second waist-shaped groove and can move along the extension direction of the second waist-shaped groove.

6. The battery pack airtightness testing device according to claim 5, characterized in that, The second sliding member is provided with a first top limiting member and a first bottom limiting member; the first top limiting member abuts against the top surface of the first driven member, and the first bottom limiting member abuts against the bottom surface of the first driven member; The fourth sliding member is provided with a second top limiting member and a second bottom limiting member. The second top limiting member abuts against the top surface of the second driven member, and the second bottom limiting member abuts against the bottom surface of the second driven member.

7. The battery pack airtightness testing device according to claim 4, characterized in that, The first transmission assembly also includes a fifth sliding member; The first driving member is connected to the fifth sliding member via a first elastic telescopic member, and the fifth sliding member is slidably mounted on the mounting member; the middle part of the first driven member is rotatably connected to the fifth sliding member; The second transmission assembly also includes a sixth sliding member; The second driving member is connected to the sixth sliding member via the second elastic telescopic member, and the sixth sliding member is slidably mounted on the mounting member; the middle part of the second driven member is rotatably connected to the sixth sliding member.

8. The battery pack airtightness testing device according to claim 2, characterized in that, The first driving member, the first driven member, the second driving member, and the second driven member are all disposed above the clamping member; The first driven member is fixedly connected to the first clamping member through a first connecting member, and the second driven member is fixedly connected to the second clamping member through a second connecting member; One end of the clamping member is provided with a first clearance groove to avoid the movement path of the first connecting member, and the other end of the clamping member is provided with a second clearance groove to avoid the movement path of the second connecting member.

9. The battery pack airtightness testing device according to claim 1, characterized in that, The clamping member is fixedly connected to the bottom surface of the mounting member, and the lifting end of the lifting assembly is connected to the mounting member. The lifting assembly can drive the mounting member to lift.

10. The battery pack airtightness testing device according to claim 9, characterized in that, The battery pack airtightness testing device also includes a bracket, and the lifting assembly includes a drive mechanism, a lifting component, and a sliding base; The drive mechanism is mounted on the bracket, the mounting component is slidably mounted on the bracket in the vertical direction, the slide block is slidably mounted on the bracket in the horizontal direction, the lifting component is fixedly connected to the mounting component, and the lifting component is provided with a guide groove, the extension direction of the guide groove is inclined to the horizontal direction; The slide block is provided with a guide member at its end, and the guide member extends into the guide groove; the drive end of the drive mechanism is connected to the slide block, and the drive mechanism can drive the slide block to slide in the horizontal direction so that the guide member slides along the guide groove.

11. The battery pack airtightness testing device according to claim 2, characterized in that, The drive assembly includes a motor and a lead screw; The lead screw is rotatably mounted on the mounting component via a bearing seat, and the motor is used to drive the lead screw to rotate about its own axis. The lead screw includes a first threaded section and a second threaded section with opposite directions of rotation. The first driving component is threadedly connected to the first threaded segment, and the second driving component is threadedly connected to the second threaded segment; The thread cross-sections of both the first and second thread segments are trapezoidal.

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