Air tightness detection device and air tightness detection system for battery pack sealing cover

Abstract

The utility model provides an air tightness detection device and an air tightness detection system for a battery pack sealing cover, and relates to the field of automobile accessory production devices. An airtight detection device for a battery pack sealing cover comprises a bearing table, a pressing part and a leak detector, and an airtight mould lower die is detachably installed on the bearing table; the pressing part is arranged on the upper side of the bearing table and comprises a hydraulic oil cylinder and a pressing plate, a piston rod of the hydraulic oil cylinder is connected with the pressing plate so that the pressing plate can move towards or away from the bearing table, and an airtight clamping fixture upper die is detachably installed on the side wall, facing the bearing table, of the pressing plate. The leak detector is used for detecting air tightness. Air tightness detection can be carried out by using relatively large total driving pressure, and the air tightness clamping fixture upper die and the air tightness clamping fixture lower die can be replaced, so that air tightness detection can be carried out on different types of battery pack sealing covers.

Description

Technical Field

[0001] The present application relates to the field of automobile accessory production equipment, and more specifically, to an airtightness detection device and an airtightness detection system for a battery pack sealing cover. Background Art

[0002] When preparing the battery pack, the battery pack sealing cover needs to be tested for air tightness in advance.

[0003] The existing airtightness detection device includes a table with cover plates hinged on opposite sides of the table. When performing airtightness detection, the battery pack sealing cover is placed on the table, and the cover plates on opposite sides are placed on the battery pack sealing cover. Two pressure rods are arranged on the other opposite sides of the table, and six cylinders are arranged at the bottom of the table. Four cylinders are respectively connected to four pressure rods, and two pressure rods are respectively connected to two cover plates. The cylinders are started to drive the cover plates to press down for airtightness detection. The total driving pressure of the six cylinders of the airtightness detection device can reach 2.5-3T at most, and it is impossible to perform airtightness detection on the battery pack sealing cover that requires a larger detection pressure. If the total driving pressure is to be increased, the cylinder diameter needs to be increased, but the current airtightness detection device cannot use a cylinder with a larger cylinder diameter due to limited space, and the overall structural strength of the airtightness detection device cannot withstand a larger total driving pressure. At the same time, the size of the airtightness detection device is fixed, and it can only perform airtightness detection on one type of battery pack sealing cover. Utility Model Content

[0004] The purpose of the present application is to provide an airtightness detection device and an airtightness detection system for a battery pack sealing cover, so as to improve the technical problem that the existing airtightness detection device cannot use a larger total driving pressure for airtightness detection and can only perform airtightness detection on one type of battery pack sealing cover.

[0005] In the first aspect, an embodiment of the present application provides an airtight detection device for a battery pack sealing cover, including a supporting platform, a pressing part and a leak detector, wherein a lower mold of an airtight mold can be detachably mounted on the supporting platform; the pressing part is arranged on the upper side of the supporting platform, the pressing part includes a hydraulic cylinder and a pressing plate, the piston rod of the hydraulic cylinder is connected to the pressing plate to enable the pressing plate to move toward or away from the supporting platform, and an upper mold of the airtight mold can be detachably mounted on a side wall of the pressing plate facing the supporting platform; the leak detector is used to detect airtightness.

[0006] In the above-mentioned implementation process, the present application separately sets up the supporting platform and the pressing part, and the pressing part includes a hydraulic cylinder and a pressing plate, the piston rod of the hydraulic cylinder is connected to the pressing plate, the hydraulic cylinder can provide a driving pressure of more than 10T, and the structure of the separately set supporting platform and the pressing part can withstand a larger driving pressure; at the same time, by detachably installing an airtight mold lower mold on the supporting platform and detachably installing an airtight mold upper mold on the side wall of the pressing plate facing the supporting platform, different types of airtight mold lower molds and airtight mold upper molds can be replaced according to different types of battery pack sealing covers, so as to realize airtightness detection of different types of battery pack sealing covers.

[0007] In a possible implementation, it also includes a bracket, a support platform is fixed at the bottom of the bracket, a hydraulic cylinder is fixed at the top of the bracket, two guide rods are slidably arranged on the bracket, the ends of the guide rods are fixed to the pressure plate, and the extension direction of the guide rods is consistent with the extension direction of the piston rod of the hydraulic cylinder.

[0008] The present application provides a guide rod, and when the hydraulic cylinder drives the pressure plate to press downward, the guide rod guides and makes the pressure distribution of the pressure plate uniform.

[0009] In a possible implementation, the leak detector is connected to the lower mold of the airtight tire.

[0010] The leak detector of the present application is connected to the lower mold of the airtight mold to perform airtightness detection on the battery pack sealing cover placed on the lower mold of the airtight mold.

[0011] In the second aspect, an embodiment of the present application provides an airtight detection system for a battery pack sealing cover, comprising a conveying assembly, a loading assembly, a manipulator, and an airtight detection device provided in the first aspect, wherein the conveying assembly is used to convey the airtight mold upper mold and the airtight mold lower mold to the side of a supporting platform to replace the airtight mold upper mold and the airtight mold lower mold, the loading assembly is used to carry the battery pack sealing cover, and the manipulator is disposed next to the supporting platform to transfer the battery pack sealing cover on the loading assembly to the airtight mold lower mold.

[0012] The present application arranges a conveying component, a loading component and a manipulator next to the airtight detection device. The conveying component conveys the airtight mold upper mold and the airtight mold lower mold, the loading component places the battery pack sealing cover to be detected, and the manipulator transfers the battery pack sealing cover. This can realize automated detection, facilitate operation, and save labor costs.

[0013] In one possible implementation, the conveying assembly includes a main conveyor belt and two auxiliary conveyor belts, and the two auxiliary conveyor belts are respectively arranged on both sides of the main conveyor belt. The two auxiliary conveyor belts are at the same horizontal height as the main conveyor belt, so that the main conveyor belt is used to carry the middle part of the airtight tire upper mold or the airtight tire lower mold, and the two auxiliary conveyor belts are used to carry the two ends of the airtight tire upper mold or the airtight tire lower mold.

[0014] In the present application, two auxiliary conveyor belts are arranged on both sides of the main conveyor belt. The upper mold and the lower mold of the airtight mold are heavier. The auxiliary conveyor belts can share the weight borne by the main conveyor belt to avoid stagnation or damage of the main conveyor belt.

[0015] In a possible implementation, a lifting platform is provided at the bottom of the conveying assembly, and the top of the lifting platform is connected to the bottom of the main conveyor belt and the two auxiliary conveyor belts.

[0016] The present application provides a lifting platform at the bottom of the conveying component, and the height of the conveying component can be adjusted accordingly when conveying the airtight mold upper mold and the airtight mold lower mold, so as to facilitate conveying the airtight mold lower mold to the side of the supporting platform, replacing and installing the airtight mold lower mold on the supporting platform, conveying the airtight mold upper mold to the side of the pressure plate, and replacing and installing the airtight mold upper mold on the pressure plate.

[0017] In a possible implementation, the loading assembly includes a placement table, on which a positioning member is disposed, and the positioning member is used to position the sealing cover of the battery pack.

[0018] The present application can pre-position the battery pack sealing cover at a preset position by arranging a positioning piece on the placement table, so that the robot arm can move to the preset position to stably and quickly grasp the battery pack sealing cover.

[0019] In one possible implementation, the positioning member includes two groups of fixed plates and two groups of movable plates for being arranged around the battery pack sealing cover, the two groups of fixed plates are respectively arranged on two adjacent sides of the placement table, and the two groups of movable plates are respectively arranged on the other two adjacent sides of the placement table, and the movable plates are both connected to a driving member for driving the movable plates to move toward the direction relative to the fixed plates.

[0020] By setting fixed plates on two adjacent sides of the placement table, the present application can first abut and fix the adjacent two sides of the battery pack sealing cover, and then move the movable plates set on the other adjacent two sides of the placement table toward the direction of the fixed plates relative to each other to abut and fix the other adjacent two sides of the battery pack sealing cover, thereby realizing the positioning of battery pack sealing covers of different models.

[0021] In a possible implementation, each set of fixed plates includes two fixed plates, which are spaced apart at both ends of one side of the placement table; each set of movable plates includes two movable plates, which are spaced apart at both ends of one side of the placement table.

[0022] The present application arranges two fixed plates or two movable plates at intervals at both ends of one side of the placement table, so that the side of the battery pack sealing cover can be more stably abutted and positioned.

[0023] In a possible implementation, the gripping surface of the manipulator is provided with four suction cups, and the four suction cups are distributed at rectangular intervals.

[0024] The robot arm of the present application is provided with four suction cups on the grasping surface, which can grasp the battery pack sealing cover stably and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of an airtightness detection device for a battery pack sealing cover provided in an embodiment of the present application.

[0027] Figure 2 A schematic diagram of an airtightness detection system for a battery pack sealing cover provided in an embodiment of the present application.

[0028] Figure 3 A top view of the conveying assembly provided in an embodiment of the present application.

[0029] Figure 4 A top view of the loading assembly provided in an embodiment of the present application.

[0030] Icons: 1-airtight detection device; 11-carrying platform; 12-hydraulic cylinder; 13-pressing plate; 14-airtight mold upper die; 15-airtight mold lower die; 16-leak detector; 17-bracket; 18-guide rod; 2-airtight detection system; 21-conveyor assembly; 211-main conveyor belt; 212-auxiliary conveyor belt; 213-lifting platform; 22-loading assembly; 221-placing table; 222-fixed plate; 223-movable plate; 224-driving part; 23-manipulator. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Example

[0038] The present application intends to improve the technical problem that the existing airtightness detection device cannot use a larger total driving pressure for airtightness detection and can only perform airtightness detection on one type of battery pack sealing cover, and proposes an airtightness detection device 1 for a battery pack sealing cover, such as Figure 1As shown, it includes a supporting platform 11, a pressing part and a leak detector 16. An airtight mold lower mold 15 can be detachably installed on the supporting platform 11; the pressing part is arranged on the upper side of the supporting platform 11, and the pressing part includes a hydraulic cylinder 12 and a pressing plate 13. The piston rod of the hydraulic cylinder 12 is connected to the pressing plate 13 to enable the pressing plate 13 to move toward or away from the supporting platform 11. The airtight mold upper mold 14 can be detachably installed on a side wall of the pressing plate 13 facing the supporting platform 11; the leak detector 16 is used to detect air tightness.

[0039] By separately setting the supporting platform 11 and the pressing part, and the pressing part includes a hydraulic cylinder 12 and a pressing plate 13, the piston rod of the hydraulic cylinder 12 is connected to the pressing plate 13, the hydraulic cylinder 12 can provide a driving pressure of more than 10T, and the structure of the separately set supporting platform 11 and the pressing part can withstand a larger driving pressure; at the same time, by detachably installing an airtight mold lower mold 15 on the supporting platform 11, and detachably installing an airtight mold upper mold 14 on a side wall of the pressing plate 13 facing the supporting platform 11, different types of airtight mold lower mold 15 and airtight mold upper mold 14 can be replaced according to different types of battery pack sealing covers, so as to realize airtightness detection of different types of battery pack sealing covers.

[0040] As an example, the support platform 11 and the pressure plate 13 are both provided with multiple groups of mounting holes, each group of mounting holes is arranged at intervals. Through the multiple groups of mounting holes arranged at intervals, different types of airtight mold lower molds 15 and airtight mold upper molds 14 can be adaptively installed.

[0041] In some embodiments, a bracket 17 is further included, the bearing platform 11 is fixed to the bottom of the bracket 17, the hydraulic cylinder 12 is fixed to the top of the bracket 17, two guide rods 18 are slidably arranged on the bracket 17, the ends of the guide rods 18 are fixed to the pressing plate 13, and the extending direction of the guide rods 18 is consistent with the extending direction of the piston rod of the hydraulic cylinder 12. When the hydraulic cylinder 12 drives the pressing plate 13 to press downward, the guide rods 18 guide and make the pressure distribution of the pressing plate 13 uniform.

[0042] In other embodiments, four guide rods 18 may also be provided, and ends of the four guide rods 18 are respectively fixed to the four corners of the pressing plate 13 .

[0043] In some embodiments, the leak detector 16 is connected to the airtight mold lower mold 15. The battery pack sealing cover placed on the airtight mold lower mold 15 can be tested for airtightness.

[0044] The present application embodiment provides a battery pack sealing cover airtightness detection system 2, such as Figure 2As shown, it includes a conveying component 21, a loading component 22 and a manipulator 23 as well as the above-mentioned airtight detection device 1, the conveying component 21 is used to convey the airtight mold upper mold 14 and the airtight mold lower mold 15 to the side of the supporting platform 11 to replace the airtight mold upper mold 14 and the airtight mold lower mold 15, the loading component 22 is used to carry the battery pack sealing cover, and the manipulator 23 is arranged next to the supporting platform 11, and is used to transfer the battery pack sealing cover on the loading component 22 to the airtight mold lower mold 15.

[0045] A conveying component 21, a loading component 22 and a manipulator 23 are arranged next to the airtight testing device 1. The conveying component 21 conveys the airtight mold upper mold 14 and the airtight mold lower mold 15. The loading component 22 places the battery pack sealing cover to be tested, and the manipulator 23 transfers the battery pack sealing cover, which can realize automated testing, is easy to operate, and saves labor costs.

[0046] In some embodiments, Figure 3 As shown, the conveying assembly 21 includes a main conveyor belt 211 and two auxiliary conveyor belts 212, the two auxiliary conveyor belts 212 are respectively arranged on both sides of the main conveyor belt 211, and the two auxiliary conveyor belts 212 are at the same level as the main conveyor belt 211, so that the main conveyor belt 211 is used to carry the middle of the airtight mold upper mold 14 or the airtight mold lower mold 15, and the two auxiliary conveyor belts 212 are used to carry the two ends of the airtight mold upper mold 14 or the airtight mold lower mold 15. The airtight mold upper mold 14 and the airtight mold lower mold 15 are heavy, and the auxiliary conveyor belt 212 can share the weight of the main conveyor belt 211 to prevent the main conveyor belt 211 from being stagnant or damaged.

[0047] In other embodiments, two main conveyor belts 211 may be directly provided, or two auxiliary conveyor belts 212 may be provided on both sides of the main conveyor belt 211. The arrangement may be made according to actual needs.

[0048] In some embodiments, a lifting platform 213 is provided at the bottom of the conveying assembly 21, and the top of the lifting platform 213 is connected to the bottom of the main conveyor belt 211 and the two auxiliary conveyor belts 212. When conveying the airtight mold upper mold 14 and the airtight mold lower mold 15, the lifting platform 213 is raised and lowered to drive the main conveyor belt 211 and the two auxiliary conveyor belts 212 to rise and fall at the same time, so as to facilitate conveying the airtight mold lower mold 15 to the side of the carrier platform 11, replacing and installing the airtight mold lower mold 15 on the carrier platform 11, conveying the airtight mold upper mold 14 to the side of the pressure plate 13, and replacing and installing the airtight mold upper mold 14 on the pressure plate 13.

[0049] In some embodiments, Figure 4As shown, the loading assembly 22 includes a placement table 221, on which a positioning member is provided, and the positioning member is used to position the battery pack sealing cover. The positioning member can pre-position the battery pack sealing cover at a preset position, so that the manipulator 23 can move to the preset position to stably and quickly grab the battery pack sealing cover.

[0050] In some embodiments, the positioning member includes two groups of fixed plates 222 and two groups of movable plates 223 for being arranged around the battery pack sealing cover. The two groups of fixed plates 222 are respectively arranged on the adjacent two sides of the placement platform 221, and the two groups of movable plates 223 are respectively arranged on the other adjacent two sides of the placement platform 221. The movable plates 223 are connected to driving members 224 for driving the movable plates 223 to move toward the direction of the opposite fixed plates 222. The fixed plates 222 are arranged on the adjacent two sides of the placement platform 221, and the adjacent two sides of the battery pack sealing cover can be abutted and fixed first, and then the movable plates 223 arranged on the other adjacent two sides of the placement platform 221 are moved toward the direction of the opposite fixed plates 222 to abut and fix the other adjacent two sides of the battery pack sealing cover, so that the sealing covers of different models of batteries can be positioned.

[0051] As an example, the driving member 224 may be, but is not limited to, a cylinder or an electric push rod.

[0052] In other embodiments, the positioning member may also be other structures. The specific structure of the positioning member may be set according to actual needs to achieve better positioning of the battery pack sealing cover.

[0053] In some embodiments, each set of fixed plates 222 includes two fixed plates 222, and the two fixed plates 222 are spaced apart at both ends of one side of the placement platform 221; each set of movable plates 223 includes two movable plates 223, and the two movable plates 223 are spaced apart at both ends of one side of the placement platform 221. By spacing the two fixed plates 222 or the two movable plates 223 at both ends of one side of the placement platform 221, the side of the battery pack sealing cover can be more stably abutted and positioned.

[0054] In other embodiments, three or four fixed plates 222 and movable plates 223 may also be provided. The number of fixed plates 222 and movable plates 223 may be set according to actual needs to achieve better positioning of the battery pack sealing cover.

[0055] In some embodiments, the gripping surface of the manipulator 23 is provided with four suction cups, which are distributed at rectangular intervals, so that the battery pack sealing cover can be gripped stably and quickly.

[0056] In other embodiments, the gripping surface of the manipulator 23 may also be provided with 5, 6, or 8 suction cups. The number of suction cups may be set according to actual needs to achieve stable and rapid gripping of the battery pack sealing cover.

[0057] During operation, the airtight mold lower mold 15 and the airtight mold upper mold 14 of the corresponding model of the battery pack sealing cover to be tested are first transported to the side of the carrier platform 11 and the pressure plate 13 through the conveying assembly 21, and the airtight mold lower mold 15 is installed on the carrier platform 11, and the airtight mold upper mold 14 is installed on the side wall of the pressure plate 13 facing the carrier platform 11; the battery pack sealing cover to be tested is placed on the placement platform 221, so that the adjacent two sides of the battery pack sealing cover are abutted against the fixed plates 222 set on the adjacent two sides of the placement platform 221, and then the movable plates 223 on the other adjacent two sides of the placement platform 221 are driven to move toward the direction of the opposite fixed plates 222, so as to abut and fix the other adjacent two sides of the battery pack sealing cover, so as to place the battery pack sealing cover to be tested on the placement platform 221. The battery pack sealing cover to be tested is fixed at a preset position; at this time, the manipulator 23 is started to move to the position on the placement table 221 where the battery pack sealing cover to be tested is fixed, the suction cup is adsorbed on the battery pack sealing cover to grab it, and the battery pack sealing cover is transferred to the airtight mold lower mold 15 installed on the carrier platform 11, and the hydraulic cylinder 12 is started to drive the pressing plate 13 downward to press the airtight mold upper mold 14 onto the battery pack sealing cover, so that the airtight mold upper mold 14 and the airtight mold lower mold 15 maintain the required pressure on the battery pack sealing cover for a period of time to perform airtightness testing. After the test is completed, the hydraulic cylinder 12 is started to lift the pressing plate 13 upwards, and the manipulator 23 is started again to transfer the battery pack sealing cover on the airtight mold lower mold 15 to the product area.

[0058] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An airtightness detection device for a battery pack sealing cover, characterized in that: include: A bearing platform, on which a lower die of an airtight tire mold can be detachably mounted; A press part, the press part is arranged on the upper side of the bearing platform, the press part comprises a hydraulic cylinder and a pressing plate, the piston rod of the hydraulic cylinder is connected to the pressing plate, so that the pressing plate moves toward or away from the bearing platform, and the pressing plate is detachably mounted on a side wall of the bearing platform with an airtight mold upper mold; A leak detector is used to detect air tightness.

2. The airtightness detection device for the battery pack sealing cover according to claim 1, characterized in that: It also includes a bracket, the support platform is fixed on the bottom of the bracket, the hydraulic cylinder is fixed on the top of the bracket, two guide rods are slidably arranged on the bracket, the ends of the guide rods are fixed on the pressure plate, and the extension direction of the guide rods is consistent with the extension direction of the piston rod of the hydraulic cylinder.

3. The airtightness detection device for the battery pack sealing cover according to claim 2, characterized in that: The leak detector is communicated with the lower mold of the airtight tire.

4. A battery pack sealing cover airtightness detection system, characterized in that: It includes a conveying component, a loading component and a manipulator, and the airtight detection device according to any one of claims 1 to 3, the conveying component is used to convey the airtight mold upper mold and the airtight mold lower mold to the side of the supporting platform to replace the airtight mold upper mold and the airtight mold lower mold, the loading component is used to carry the battery pack sealing cover, and the manipulator is arranged next to the supporting platform to transfer the battery pack sealing cover on the loading component to the airtight mold lower mold.

5. The airtightness detection system for the battery pack sealing cover according to claim 4, characterized in that: The conveying assembly includes a main conveyor belt and two auxiliary conveyor belts, the two auxiliary conveyor belts are respectively arranged on both sides of the main conveyor belt, and the two auxiliary conveyor belts are at the same horizontal height as the main conveyor belt, so that the main conveyor belt is used to carry the middle part of the airtight tire upper mold or the airtight tire lower mold, and the two auxiliary conveyor belts are used to carry the two ends of the airtight tire upper mold or the airtight tire lower mold.

6. The airtightness detection system for the battery pack sealing cover according to claim 5, characterized in that: A lifting platform is arranged at the bottom of the conveying assembly, and the top of the lifting platform is connected to the bottoms of the main conveying belt and the two auxiliary conveying belts.

7. The airtightness detection system for the battery pack sealing cover according to claim 4, characterized in that: The loading assembly includes a placement table, on which a positioning member is disposed, and the positioning member is used to position the battery pack sealing cover.

8. The airtightness detection system for the battery pack sealing cover according to claim 7, characterized in that: The positioning member includes two groups of fixed plates and two groups of movable plates for being arranged around the battery pack sealing cover, the two groups of fixed plates are respectively arranged on two adjacent side edges of the placement table, and the two groups of movable plates are respectively arranged on the other two adjacent side edges of the placement table, and the movable plates are both connected to a driving member for driving the movable plates to move in the direction relative to the fixed plates.

9. The airtightness detection system for the battery pack sealing cover according to claim 8, characterized in that: Each set of the fixed plates includes two fixed plates, which are spaced apart at both ends of one side of the placement table; each set of the movable plates includes two movable plates, which are spaced apart at both ends of one side of the placement table.

10. The airtightness detection system for the battery pack sealing cover according to claim 4, characterized in that: The gripping surface of the manipulator is provided with four suction cups, and the four suction cups are distributed at rectangular intervals.

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