Battery airtightness testing system and method

Abstract

The present application provides a battery airtightness testing system and method. The battery airtightness testing system comprises a first test module and at least two re-test modules. The first test module is configured to perform first airtightness testing on a plurality of incoming battery packs; each incoming battery pack comprises a plurality of batteries; and the battery packs tested by the first test module include a first compliant battery pack and a first non-compliant battery pack. The re-test module comprises a buffer platform, a re-test chamber, and a re-test manipulator; the buffer platform is configured to receive and store the first non-compliant battery pack; the re-test manipulator is configured to grab all batteries in the first non-compliant battery pack stored in the buffer platform into the re-test chamber; the re-test chamber is configured to perform independent second airtightness testing on each battery in the first non-compliant battery pack; and the batteries tested by the re-test chamber include a second compliant battery and a second non-compliant battery.

Description

Battery air tightness detection system and method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410004826.9, filed on January 2, 2024, entitled “Battery Air Tightness Detection System and Method,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and more particularly to a battery air tightness detection system and method. Background Art

[0004] During the use of lithium batteries, if the sealing of the lithium battery shell is poor, problems such as leakage and swelling will occur, resulting in certain safety hazards in the use of lithium batteries. Therefore, the airtightness testing of lithium batteries is an important step in the lithium battery production process.

[0005] As an important link in the lithium battery production process, how to improve the efficiency of lithium battery air tightness testing is an urgent problem to be solved.

[0006] Summary of the Invention

[0007] In view of the above problems, the present application provides a battery air tightness detection system and method to improve detection efficiency.

[0008] In a first aspect, the present application provides a battery air tightness detection system, which includes a first inspection module and at least two re-inspection modules. The first inspection module is configured to perform a first air tightness test on multiple incoming battery groups, each incoming battery group includes multiple batteries, and the battery groups inspected by the first inspection module include a first qualified battery group and a first unqualified battery group. All batteries in the first qualified battery group pass the first air tightness test, and at least one battery in the first unqualified battery group fails the first air tightness test. The re-inspection module includes a cache platform, a re-inspection chamber, and a re-inspection manipulator. The cache platform is configured to receive and store the first unqualified battery group. The re-inspection manipulator is configured to grab all batteries of the first unqualified battery group cached by the cache platform into the re-inspection chamber. The re-inspection chamber is configured to perform an independent second air tightness test on each battery of the first unqualified battery group. The batteries inspected by the re-inspection chamber include a second qualified battery and a second unqualified battery.

[0009] In the technical solution of this application, at least two re-inspection modules are provided to perform a second airtightness test on the batteries of the first unqualified battery pack. The at least two re-inspection modules operate in parallel, thereby improving the re-inspection processing capacity of the battery airtightness testing system and enhancing production efficiency. Furthermore, each re-inspection module includes its own re-inspection manipulator, which enables at least two re-inspection chambers to operate simultaneously and in parallel, avoiding the problem of at least two re-inspection chambers having to operate only serially due to a limited number of re-inspection manipulators, further improving testing efficiency.

[0010] In some embodiments, the re-inspection module further includes a re-inspection pairing platform, and the re-inspection robot is configured to grab the second qualified battery and place it on the re-inspection pairing platform for pairing into groups.

[0011] The re-inspection module of the embodiment of the present application is provided with a re-inspection pairing platform independent of the cache platform, so that the cache work and the pairing work are run independently, reducing the conflict of the action process and improving the fault tolerance rate.

[0012] In some embodiments, the battery air tightness detection system also includes a first unloading robot and a first-level unloading conveyor belt. The first unloading robot is configured to grab the second qualified battery group to the first-level unloading conveyor belt after multiple second qualified batteries are paired on the re-inspection pairing platform to form a second qualified battery group.

[0013] In the embodiment of the present application, a re-inspection robot and a first-level unloading robot are provided to perform re-inspection work and unloading work respectively, so that the re-inspection work and unloading work can be carried out in parallel, thereby improving the entire production rhythm and production efficiency.

[0014] In some embodiments, the first unloading robot is further configured to grab the first qualified battery pack to the first-level unloading conveyor belt and grab the first unqualified battery pack to the buffer platform.

[0015] The first unloading robot of the embodiment of the present application is configured to transfer the incoming battery pack that has passed the first airtightness test to the next step according to the test results, and the processing flow is simple.

[0016] In some embodiments, the at least two re-inspection modules include a first re-inspection module and a second re-inspection module that are arranged opposite to each other.

[0017] The at least two re-inspection modules of the embodiment of the present application are arranged in a relative manner, which makes the structure of the battery airtightness testing system of the embodiment of the present application compact. In addition, the movement path of the first unqualified battery pack output from the initial inspection module is basically the same regardless of whether it is transferred to the first re-inspection module for a second airtightness test or to the second re-inspection module for a second airtightness test, thereby reducing the complexity of the control method.

[0018] In some embodiments, the battery air tightness detection system also includes at least two unqualified battery conveyor belts, and the at least two unqualified battery conveyor belts are corresponding to at least two re-inspection modules, and the re-inspection robot is configured to grab the second unqualified battery to the at least two unqualified battery conveyor belts.

[0019] The battery air tightness detection system of the embodiment of the present application is provided with at least two unqualified battery conveyor belts, each of which corresponds to a re-inspection module. This allows for flexible processing of unqualified batteries detected by the re-inspection module, increases the total amount of cache, and enhances the waste disposal processing capability.

[0020] In some embodiments, the first inspection module includes multiple first inspection cavities, which are arranged corresponding to multiple incoming battery packs so that each first inspection cavity is configured to perform a first airtightness inspection on multiple batteries in the incoming battery pack.

[0021] The first inspection module of the embodiment of the present application includes multiple first inspection chambers, each of which corresponds to an incoming battery group. In this way, the multiple incoming battery groups can be transferred to multiple first inspection chambers for the first air tightness test, thereby improving the processing capacity of the battery air tightness detection system of the embodiment of the present application.

[0022] In some embodiments, the battery air tightness testing system includes at least two primary inspection modules and a loading robot. The at least two primary inspection modules include a first primary inspection module and a second primary inspection module. The loading robot is configured to load multiple incoming battery packs into the first primary inspection module and the second primary inspection module, and to load the second primary inspection module only when at least two primary inspection cavities of the first primary inspection module are full.

[0023] The loading robot of the embodiment of the present application first determines whether the first inspection module is full when loading materials. Only when the first inspection module is full will it load materials to the second inspection module. This can avoid the first inspection cavity of the first inspection module being idle, thereby ensuring processing efficiency.

[0024] In some embodiments, the battery air tightness testing system also includes a qualified battery unloading conveyor belt, a pressure test conveyor belt arranged downstream of the qualified battery unloading conveyor belt, a second unloading robot and an unloading pairing platform. The qualified battery unloading conveyor belt is configured to receive batteries that have passed the air tightness test. The batteries that have passed the air tightness test include multiple batteries of a first qualified battery group and a second qualified battery pressure test conveyor belt. The conveyor belt is configured to perform a pressure test on the batteries that have passed the air tightness test. The second unloading robot is configured to grab at least two batteries from the pressure test conveyor belt and place the batteries that have passed the pressure test on the unloading pairing platform according to the test results of the pressure test conveyor belt. The unloading pairing platform is configured to receive batteries that have passed the pressure test and pair them into groups.

[0025] The battery air tightness detection system of the embodiment of the present application cooperates with the second unloading robot and the unloading pairing platform. Batteries that pass the pressure test are paired and cached on the unloading pairing platform, while batteries that fail the pressure test are directly discharged by the second unloading robot. This setting improves the efficiency of the process and reduces the waste of the pull-belt cache position.

[0026] In some embodiments, the second unloading robot includes at least two gripping parts corresponding to at least two batteries, and the at least two gripping parts are arranged in sequence in the arrangement direction of the at least two batteries. The at least two batteries include batteries that pass the voltage test and batteries that fail the voltage test. The second unloading robot is configured to control the gripping part configured to grip the batteries that pass the voltage test to open so as to place the batteries that pass the voltage test on the unloading pairing platform, and control the gripping part configured to grip the batteries that fail the voltage test to close so as to continue to grip the batteries that fail the voltage test.

[0027] The second unloading robot of the embodiment of the present application simultaneously grasps batteries that have passed the voltage test and batteries that have failed the voltage test, thereby avoiding repeated grasping and improving efficiency. It also avoids caching batteries that have failed the voltage test on the drawstring, reducing the waste of drawstring cache space.

[0028] In some embodiments, the unloading pairing platform includes a platform body and a lifting mechanism. The platform body is configured to place batteries that have passed the pressure test placed by the second unloading robot. When there are vacancies between multiple batteries that have passed the pressure test, the lifting mechanism lifts at least part of the multiple batteries that have passed the pressure test upward and moves them horizontally so that the multiple batteries that have passed the pressure test are arranged in sequence on the platform body.

[0029] The unloading and pairing platform of the embodiment of the present application is provided with a lifting mechanism to lift and translate the batteries to fill the empty spaces within the platform body with the batteries, thereby completing the sorting and pairing of multiple batteries to facilitate the unloading process of the battery pack.

[0030] In some embodiments, the battery air tightness detection system further includes a loading and scanning conveyor belt, which is configured to scan the individual batteries of the incoming battery pack before the incoming battery pack is loaded into the first inspection module.

[0031] The battery air tightness detection system of the embodiment of the present application scans the incoming battery group before loading, but does not scan and discard the batteries that fail the scanning before loading. This avoids process waste caused by scanning and discarding the entire group of batteries because individual batteries in a group of batteries have unqualified scanning results, thereby improving the problem of low efficiency caused by repeated testing.

[0032] In some embodiments, the battery air tightness testing system also includes a qualified battery unloading conveyor belt, a second unloading robot and an unloading pairing platform. The qualified battery unloading conveyor belt is configured to receive batteries that have passed the air tightness test. The second unloading robot is configured to transport batteries that have passed the air tightness test according to the scanning results of the loading scanning conveyor belt. The second unloading robot transports the batteries that have passed the scanning to the unloading pairing platform for pairing into groups.

[0033] After the battery air tightness detection system of the embodiment of the present application completes scanning of the incoming battery pack, it will not immediately perform scanning and waste treatment, but will scan and waste treatment for the batteries that have passed the air tightness test. This can avoid repeated testing and improve efficiency.

[0034] In a second aspect, the present application provides a battery air tightness detection method based on the above-mentioned battery air tightness detection system, and the battery air tightness detection method comprises the following steps:

[0035] The first inspection module is controlled to perform a first air-tightness test on multiple incoming battery groups. The battery groups tested by the first inspection module include a first qualified battery group and a first unqualified battery group. All batteries in the first qualified battery group pass the first air-tightness test, and at least one battery in the first unqualified battery group fails the first air-tightness test. Each battery in the first unqualified battery group is captured and placed in a re-inspection chamber of at least two re-inspection modules for an independent second air-tightness test. The batteries tested in the re-inspection chamber include a second qualified battery and a second unqualified battery.

[0036] The battery air tightness detection method of the embodiment of the present application utilizes at least two re-inspection modules to perform a second air tightness detection on the batteries of the first unqualified battery pack. The at least two re-inspection modules operate in parallel, thereby improving the re-inspection processing capability of the battery air tightness detection system and improving production efficiency.

[0037] In some embodiments, the battery air tightness detection system includes a first first inspection module and a second first inspection module, and the battery air tightness detection method also includes: loading multiple incoming battery packs into the first first inspection module and the second first inspection module, and loading into the second first inspection module when at least two first inspection cavities of the first first inspection module are full.

[0038] The loading robot of the embodiment of the present application first determines whether the first inspection module is full when loading materials. Only when the first inspection module is full will it load materials to the second inspection module. This can avoid the first inspection cavity of the first inspection module being idle, thereby ensuring processing efficiency.

[0039] In some embodiments, the battery air tightness detection method includes: scanning the barcode of each battery in the incoming battery pack before loading the incoming battery pack into the first inspection module.

[0040] The battery air tightness detection system of the embodiment of the present application scans the incoming battery group before loading, but does not scan and discard the batteries that fail the scanning before loading. This avoids process waste caused by scanning and discarding the entire group of batteries because individual batteries in a group of batteries have unqualified scanning results, thereby improving the problem of low efficiency caused by repeated testing.

[0041] In some embodiments, the battery air tightness testing method further includes: after completing the second air tightness test, disposing of the batteries that fail the second air tightness test according to the scanning results of each battery in the incoming battery pack.

[0042] After the battery air tightness detection system of the embodiment of the present application completes scanning of the incoming battery pack, it will not immediately perform scanning and waste treatment, but will scan and waste treatment for the batteries that have passed the air tightness test. This can avoid repeated testing and improve efficiency.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0045] FIG1 is a structural block diagram of a battery air tightness detection system according to some embodiments of the present application;

[0046] FIG2 is a schematic structural diagram of a blanking pairing platform in one state according to some embodiments of the present application;

[0047] FIG3 is a structural diagram of another state of the blanking pairing platform in some embodiments of the present application

[0048] FIG4 is a schematic diagram of the steps of a battery air tightness detection method according to some embodiments of the present application;

[0049] In the drawings, the drawings are not drawn to scale.

[0050] Description of the markings: Loading rotary conveyor belt 100; Loading code scanning conveyor belt 200; Loading transfer conveyor belt 300; Loading conveyor belt 400; Loading robot 500; Initial inspection module 600, first initial inspection module 600a, second initial inspection module 600b; First unloading robot 700; First-level unloading conveyor belt 800; Pressure test conveyor belt 900; Unloading buffer conveyor belt 1000; Unloading rotary conveyor belt 1100; Second-level unloading conveyor belt 1200; Unloading pairing platform 1300, platform body 13001, lifting mechanism 13002, translation mechanism 13003; Second unloading robot 1400; Buffer unloading conveyor belt 1500; Buffer platform 1600; Re-inspection pairing platform 1700; Re-inspection chamber 1800; Unqualified battery conveyor belt 1900; Re-inspection robot 2000. DETAILED DESCRIPTION

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0052] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0053] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0055] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0056] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0057] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0058] A battery typically consists of a casing, a top cover, and an electrode assembly housed within the casing. The casing and top cover are welded together to ensure the battery's tightness. To ensure the battery's tightness meets requirements, the weld quality between the casing and top cover must be inspected. This is typically done using a battery airtightness testing system.

[0059] The battery air tightness detection system in the related art has low detection efficiency and cannot meet higher production requirements.

[0060] In order to improve the detection efficiency, an embodiment of the present application provides a battery air tightness detection system. The battery air tightness detection system of this embodiment is provided with at least two re-inspection modules, so that multiple batteries in a battery pack that are detected as unqualified by the initial inspection module can be subjected to a secondary inspection by at least two re-inspection modules. At least two re-inspection modules work in parallel, thereby improving the re-inspection processing capability of the battery air tightness detection system and improving production efficiency.

[0061] 1 , the battery air tightness detection system of some embodiments of the present application includes a first inspection module 600 and at least two re-inspection modules. The first inspection module 600 is configured to perform a first air tightness test on a plurality of incoming battery groups. Each incoming battery group includes a plurality of batteries, and the battery groups inspected by the first inspection module 600 include a first qualified battery group and a first unqualified battery group. All batteries in the first qualified battery group pass the first air tightness test. At least one battery in the first unqualified battery group fails the first air tightness test. The re-inspection module includes a cache platform 1600, a re-inspection chamber 1800, and a re-inspection manipulator 2000. The cache platform 1600 is configured to receive and store the first unqualified battery group. The re-inspection manipulator 2000 is configured to grab all batteries of the first unqualified battery group cached by the cache platform 1600 into the re-inspection chamber 1800. The re-inspection chamber 1800 is configured to perform an independent second airtightness test on each battery of the first unqualified battery group. The batteries tested by the re-inspection chamber 1800 include a second qualified battery and a second unqualified battery.

[0062] The first inspection module 600 of the embodiment of the present application is configured to perform the first airtightness test on multiple incoming battery groups. An incoming battery group refers to a plurality of batteries that are transported in groups. For example, four batteries form an incoming battery group, which is clamped and loaded by a manipulator or other clamping tools. In a specific embodiment, an incoming battery group formed by four batteries is used as an example for explanation. It can be understood that five batteries or six batteries can also be tested as a group, or other numbers can be tested as a group, which is not limited here. On the other hand, the first inspection module 600 of the embodiment of the present application simultaneously tests a group of batteries when performing the first airtightness test. In this way, if the airtightness of all batteries in an incoming battery group is qualified, the incoming battery group is determined to be the first qualified battery group. If the airtightness of any battery in an incoming battery group is unqualified, the incoming battery group is determined to be the first unqualified battery group.

[0063] In the specific embodiment shown in Figure 1, the first inspection module 600 includes four first inspection chambers 610. Each first inspection chamber 610 is configured to inspect the airtightness of an incoming battery pack. In other embodiments, the first inspection module 600 may include any number of first inspection chambers 610.

[0064] After the first inspection module 600 performs the first airtightness test, the cache platform 1600 is configured to receive and store the first unqualified battery group. Since the airtightness of at least one battery in the first unqualified battery group is unqualified, the airtightness of each battery needs to be tested a second time. The re-inspection manipulator 2000 is configured to grab the batteries of the first unqualified battery group of the cache platform 1600 and bring them to the re-inspection chamber 1800 for a second airtightness test. In order to accurately identify batteries with unqualified airtightness, during the second airtightness test, the re-inspection chamber 1800 performs an independent test on each battery of the first unqualified battery group. For example, in some embodiments, the re-inspection chamber 1800 includes at least two sub-re-inspection chambers, each of which is configured to perform an airtightness test on a single battery. In this way, after the re-inspection chamber 1800 has completed the inspection, the second qualified battery and the second unqualified battery can be identified. In this way, the second unqualified battery can be directly disposed of.

[0065] In the technical solution of the embodiment of the present application, at least two re-inspection modules are provided to perform a second air tightness test on the batteries of the first unqualified battery pack, and at least two re-inspection modules work in parallel, thereby improving the re-inspection processing capability of the battery air tightness detection system and improving production efficiency. Moreover, each re-inspection module includes its own re-inspection manipulator 2000, so that at least two re-inspection chambers 1800 can work in parallel at the same time, avoiding the problem that at least two re-inspection chambers 1800 can only work in series due to the limited number of re-inspection manipulators 2000, thereby further improving the detection efficiency. In addition, each re-inspection module includes its own cache platform 1600, which increases the number of batteries that can be cached and improves the processing capacity of the detection system.

[0066] In some embodiments, the re-inspection module further includes a re-inspection pairing platform 1700. The re-inspection robot 2000 is configured to grab the second qualified battery and place it on the re-inspection pairing platform 1700 for pairing into groups.

[0067] The re-inspection pairing platform 1700 is used to pair the batteries that have passed the re-inspection chamber 1800 into groups. This facilitates the unloading of qualified batteries in groups and can improve the unloading efficiency compared to unloading a single qualified battery. For example, in some embodiments, four qualified batteries are unloaded in groups. Then, the batteries that have passed the re-inspection chamber 1800 inspection will be grabbed by the re-inspection manipulator 2000 in turn and brought to the re-inspection pairing platform 1700. After the four qualified batteries are grouped, they will be unloaded together. For example, in a specific embodiment, the re-inspection pairing platform has multiple receiving slots, and the multiple receiving slots are configured to store batteries. By setting sensors in the receiving slots to obtain the number of stored batteries, when the number of batteries is grouped, the manipulator can directly grab and unload the grouped battery groups.

[0068] The recheck module of the embodiment of the present application is provided with a recheck pairing platform 1700 independent of the cache platform 1600, so that the cache work and the pairing work are run independently, reducing the conflict of the action process and improving the fault tolerance rate.

[0069] In some embodiments, the battery air tightness testing system further includes a first unloading robot 700 and a first-level unloading conveyor belt 800. The first unloading robot 700 is configured to grab a second qualified battery pack onto the first-level unloading conveyor belt 800 after a plurality of second qualified batteries are paired to form a second qualified battery pack on the re-inspection pairing platform 1700.

[0070] 1 , the re-inspection chamber 1800 performs a second airtightness test on the battery, and the qualified batteries are grabbed by the re-inspection robot 2000 and taken to the re-inspection pairing platform 1700 for pairing and grouping. The first unloading robot 700 is configured to grab the grouped batteries and take them to the first-level unloading conveyor belt 800 .

[0071] In the embodiment of the present application, a re-inspection robot 2000 and a first-level unloading robot 700 are provided to respectively perform re-inspection work and unloading work, so that the re-inspection work and unloading work can be carried out in parallel, thereby improving the entire production rhythm and production efficiency.

[0072] In some embodiments, the first unloading robot 700 is further configured to grab the first qualified battery pack to the first-level unloading conveyor belt 800 and grab the first unqualified battery pack to the buffer platform 1600 .

[0073] The first unloading robot 700 transfers and handles batteries in groups. This means the first unloading robot 700 can transfer one incoming battery pack at a time. Specifically, the first unloading robot 700 includes multiple gripping sections, each configured to grasp a single battery.

[0074] The first unloading robot 700 of the embodiment of the present application is configured to transfer the incoming battery pack that has passed the first airtightness test to the next step according to the test results, and the processing flow is simple.

[0075] In some embodiments, the at least two re-inspection modules include a first re-inspection module and a second re-inspection module that are arranged opposite to each other.

[0076] The relative arrangement of the first re-inspection module and the second re-inspection module refers to the corresponding arrangement of the first re-inspection module and the second re-inspection module. For example, in the embodiment shown in Figure 1, the buffer platform of the first re-inspection module and the buffer platform of the second re-inspection module are arranged relative to each other. The re-inspection pairing platform of the first re-inspection module and the re-inspection pairing platform of the second re-inspection module are arranged relative to each other. The re-inspection cavity of the first re-inspection module and the re-inspection cavity of the second re-inspection module are arranged relative to each other.

[0077] The at least two re-inspection modules of the embodiment of the present application are arranged in a relative manner, which makes the structure of the battery airtightness testing system of the embodiment of the present application compact. In addition, the movement path of the first unqualified battery pack output from the initial inspection module 600 is basically the same regardless of whether it is transferred to the first re-inspection module for a second airtightness test or to the second re-inspection module for a second airtightness test, thereby reducing the complexity of the control method.

[0078] In some embodiments, the battery airtightness testing system further includes at least two unqualified battery conveyor belts 1900. The at least two unqualified battery conveyor belts 1900 are provided corresponding to the at least two re-inspection modules. The re-inspection robot 2000 is configured to grab the second unqualified battery and place it on the at least two unqualified battery conveyor belts 1900.

[0079] The second unqualified battery is a battery that has been verified as unqualified after two airtightness tests. The battery airtightness testing system of the embodiment of the present application is provided with at least two unqualified battery conveyor belts 1900, each of which corresponds to a re-inspection module. This allows for flexible processing of batteries that fail the re-inspection module, increases the total amount of buffer, and enhances the waste processing capacity.

[0080] 1 , the first inspection module 600 includes a plurality of first inspection chambers 610. The plurality of first inspection chambers 610 are correspondingly arranged to a plurality of incoming battery packs so that each first inspection chamber 610 is configured to perform a first airtightness inspection on a plurality of batteries in an incoming battery pack.

[0081] As shown in Figure 1, the initial inspection module 600 includes multiple independently arranged initial inspection chambers 610. Each initial inspection chamber 610 is capable of performing independent airtightness testing. Each initial inspection chamber 610 houses an incoming battery pack, i.e., multiple batteries. For example, in one embodiment, each initial inspection chamber 610 houses four batteries.

[0082] The first inspection module 600 of the embodiment of the present application includes multiple first inspection chambers 610, each of which corresponds to an incoming battery group. In this way, the multiple incoming battery groups can be transferred to the multiple first inspection chambers 610 for the first air tightness test, thereby improving the processing capacity of the battery air tightness detection system of the embodiment of the present application.

[0083] In some embodiments, the battery air tightness testing system includes at least two primary inspection modules and a loading robot 500. The at least two primary inspection modules include a first primary inspection module 600a and a second primary inspection module 600b. The loading robot 500 is configured to load multiple incoming battery packs into the first primary inspection module 600a and the second primary inspection module 600b, and only load the second primary inspection module 600b when at least two primary inspection cavities of the first primary inspection module 600a are full.

[0084] The loading robot 500 is configured to load the multiple incoming battery packs into at least two first inspection modules for the first air tightness test. Since each first inspection module includes multiple first inspection cavities, multiple incoming battery packs can be tested at the same time. In order to make full use of the processing capacity of each first inspection module, it is necessary to judge the capacity of the previous first inspection module when loading. Only when the previous first inspection module is full will the loading robot continue to load the next first inspection module, thus avoiding the first inspection cavity of the first inspection module being empty and causing a waste of processing capacity. For example, in a specific embodiment, the first inspection module 600 includes four first inspection cavities 610. Then, when the four first inspection cavities 610 of the first first inspection module 600a are all filled with incoming battery packs, the loading robot 500 will load the next incoming battery pack into the second first inspection module 600b.

[0085] The loading robot 500 of the embodiment of the present application first determines whether the first inspection module 600a is full when loading materials. Only when the first inspection module 600a is full will it load materials to the second inspection module 600b. This can avoid the first inspection cavity of the first inspection module from being idle, thereby ensuring processing efficiency.

[0086] In some embodiments, the battery airtightness testing system further includes a qualified battery unloading conveyor belt 800. The qualified battery unloading conveyor belt 800 is configured to receive batteries that have passed the airtightness test. The batteries that have passed the airtightness test include multiple batteries of the first qualified battery group and the second qualified battery.

[0087] In some embodiments, the battery air tightness detection system further includes a pressure test conveyor belt 900, a second unloading robot 1400, and an unloading pairing platform 1300, which are arranged downstream of the qualified battery unloading conveyor belt 800. The pressure test conveyor belt 900 is configured to perform a pressure test (HIPOT test) on batteries that have passed the air tightness test. The second unloading robot 1400 is configured to grab at least two batteries from the pressure test conveyor belt 900 and place the batteries that have passed the pressure test on the unloading pairing platform 1300 according to the test results of the pressure test conveyor belt 900. The unloading pairing platform 1300 is configured to receive batteries that have passed the pressure test and pair them into groups.

[0088] Referring to Figure 1 , after the batteries are tested for airtightness, qualified batteries are placed onto the qualified battery unloading conveyor belt 800 . Furthermore, the batteries are subjected to a pressure test, also known as a HIPOT test, using the pressure test conveyor belt 900 . After the pressure test, qualified batteries are discharged. Batteries that fail the pressure test are discharged onto the NG pull belt. The second unloading robot is configured to grab at least two batteries from the pressure test conveyor belt 900 . This means that the second unloading robot 1400 directly grabs multiple batteries from the pressure test conveyor belt 900 , including both batteries that pass the pressure test and batteries that fail the pressure test. After grabbing, the second unloading robot 1400 moves to the unloading pairing platform 1300 and, based on the test results of the pressure test conveyor belt 900 , places the corresponding qualified batteries onto the unloading pairing platform 1300, while grabbing the batteries that fail the pressure test onto the NG unloading pull belt. For example, in one specific embodiment, the second unloading robot 1400 includes four gripping sections, allowing the second unloading robot 1400 to directly grab four batteries from the withstand voltage test conveyor belt 900. If two of the batteries pass the withstand voltage test and the other two fail, when the second unloading robot 1400 moves above the unloading pairing platform 1300, the gripping sections configured to grab batteries that pass the withstand voltage test can be controlled to open and release the batteries that pass the withstand voltage test onto the unloading pairing platform 1300. The gripping sections configured to grab batteries that fail the withstand voltage test continue to hold the batteries.

[0089] The battery air tightness detection system of the embodiment of the present application cooperates with the second unloading robot 1400 and the unloading pairing platform 1300. Batteries that pass the pressure test are paired and cached on the unloading pairing platform 1300, while batteries that fail the pressure test are directly discharged by the second unloading robot 1400. This setting improves the efficiency of the process and reduces the waste of the pull-belt cache position.

[0090] In some embodiments, the second unloading robot 1400 includes at least two gripping parts corresponding to the at least two batteries. The at least two gripping parts are arranged in sequence in the arrangement direction of the at least two batteries. The at least two batteries include batteries that pass the withstand voltage test and batteries that fail the withstand voltage test. The second unloading robot 1400 is configured to control the gripping part configured to grip the batteries that pass the withstand voltage test to open so as to place the batteries that pass the withstand voltage test on the unloading pairing platform 1300, and control the gripping part configured to grip the batteries that fail the withstand voltage test to close so as to continue to grip the batteries that fail the withstand voltage test.

[0091] The second unloading robot 1400 of the embodiment of the present application simultaneously grasps batteries that have passed the withstand voltage test and batteries that have failed the withstand voltage test, thereby avoiding repeated grasping and improving efficiency. It also prevents batteries that have failed the withstand voltage test from being cached on the drawstring, reducing the waste of drawstring cache space.

[0092] In some embodiments, referring to Figures 2 and 3 , the unloading pairing platform 1300 includes a platform body 13001 and a lifting mechanism 13002. The platform body 13001 is configured to place batteries that have passed the withstand voltage test placed by the second unloading robot 1400. When there are vacancies between multiple batteries that have passed the withstand voltage test, the lifting mechanism 13002 lifts at least some of the multiple batteries that have passed the withstand voltage test upward and moves them laterally so that the multiple batteries that have passed the withstand voltage test are sequentially arranged on the platform body 13001.

[0093] From the above description, it can be seen that the second unloading robot 1400 grabs the batteries that have passed the voltage test and the batteries that have failed the voltage test at the same time. Then, among the multiple batteries that are simultaneously grabbed by the second unloading robot 1400, at least two batteries that have passed the voltage test are not necessarily all arranged adjacent to each other. In this way, when the second unloading robot 1400 controls the gripping part to open in order to place the at least two batteries that have passed the voltage test on the platform body 13001, there may be a vacant space between the at least two batteries that have passed the voltage test. When there is a vacant space, it is necessary to lift and translate a certain battery through the lifting mechanism 13002 so that the multiple batteries placed on the platform body 13001 are adjacent and arranged in sequence, thereby completing effective pairing and grouping. It should be noted that the translation of the lifting mechanism 13002 is a translation in the arrangement direction of the batteries.

[0094] In another embodiment, the platform body 13001 has multiple storage slots. These slots are configured to accommodate multiple batteries. If at least two batteries that have passed the withstand voltage test are not placed adjacent to each other, there will be an empty slot between at least two batteries, which can affect battery pairing. Therefore, this embodiment of the present application utilizes a lifting mechanism 13002 to achieve battery pairing in the platform body 13001.

[0095] The unloading and pairing platform 1300 of the embodiment of the present application is provided with a lifting mechanism 13002 to lift and translate the batteries so as to fill the empty spaces in the platform body 13001 with the batteries, thereby completing the sorting and pairing of multiple batteries to facilitate the unloading process of the battery pack.

[0096] In some embodiments, the battery air tightness detection system further includes a loading and scanning conveyor belt 200. The loading and scanning conveyor belt 200 is configured to scan the batteries of the incoming battery packs before the incoming battery packs are loaded into the first inspection module 600. After the scanning process, the multiple incoming battery packs are loaded into the first inspection module 600.

[0097] The battery air tightness detection system of the embodiment of the present application scans the incoming battery group before loading, but does not scan and discard the batteries that fail the scanning before loading. This avoids process waste caused by scanning and discarding the entire group of batteries because individual batteries in a group of batteries have unqualified scanning results, thereby improving the problem of low efficiency caused by repeated testing.

[0098] Referring to Figure 1 , in some embodiments, the battery airtightness testing system further includes a qualified battery unloading conveyor belt 800, a second unloading robot 1400, and a pairing platform 1300. The qualified battery unloading conveyor belt 800 is configured to receive batteries that have passed the airtightness test. The second unloading robot 1400 is configured to transport batteries that have passed the airtightness test based on the scan results of the loading and scanning conveyor belt 200. The second unloading robot 1400 then transports the batteries that have passed the scan results to the pairing platform 1300 for pairing and grouping.

[0099] After the battery air tightness detection system of the embodiment of the present application completes scanning of the incoming battery pack, it will not immediately perform scanning and waste treatment, but will scan and waste treatment for the batteries that have passed the air tightness test. This can avoid repeated testing and improve efficiency.

[0100] 4 , the present application further provides a battery air tightness detection method based on the battery air tightness detection system of the above embodiment, comprising the following steps:

[0101] S40, controlling the first inspection module 600 to perform a first air tightness test on the plurality of incoming battery packs, wherein the battery packs inspected by the first inspection module 600 include a first qualified battery pack and a first unqualified battery pack, wherein all batteries in the first qualified battery pack pass the first air tightness test, and at least one battery in the first unqualified battery pack fails the first air tightness test;

[0102] S50, each battery of the first unqualified battery pack is captured and placed in the re-inspection chamber 1800 of at least two re-inspection modules for an independent second airtightness test. The batteries tested in the re-inspection chamber 1800 include a second qualified battery and a second unqualified battery.

[0103] The battery air tightness detection method of the embodiment of the present application utilizes at least two re-inspection modules to perform a second air tightness detection on the batteries of the first unqualified battery pack. The at least two re-inspection modules operate in parallel, thereby improving the re-inspection processing capability of the battery air tightness detection system and improving production efficiency.

[0104] In some embodiments, the battery air tightness detection system includes a first first inspection module and a second first inspection module, and the battery air tightness detection method also includes loading multiple incoming battery packs into the first first inspection module and the second first inspection module, and loading into the second first inspection module 600b when at least two first inspection cavities of the first first inspection module 600a are full.

[0105] The loading robot 500 of the embodiment of the present application first determines whether the first inspection module 600a is full when loading materials. Only when the first inspection module 600a is full will it load materials to the second inspection module 600b. This can avoid the first inspection cavity of the first inspection module from being idle, thereby ensuring processing efficiency.

[0106] In some embodiments, the battery air tightness detection method includes scanning the barcode of each battery in the incoming battery pack before loading the incoming battery pack into the first inspection module.

[0107] The battery air tightness detection system of the embodiment of the present application scans the incoming battery group before loading, but does not scan and discard the batteries that fail the scanning before loading. This avoids process waste caused by scanning and discarding the entire group of batteries because individual batteries in a group of batteries have unqualified scanning results, thereby improving the problem of low efficiency caused by repeated testing.

[0108] In some embodiments, the battery air tightness testing method further includes: after completing the second air tightness test, disposing of the batteries that fail the second air tightness test according to the scanning results of each battery in the incoming battery pack.

[0109] The battery air tightness detection system of the embodiment of the present application scans the incoming battery group before loading, but does not scan and discard the batteries that fail the scanning before loading. This avoids process waste caused by scanning and discarding the entire group of batteries because individual batteries in a group of batteries have unqualified scanning results, thereby improving the problem of low efficiency caused by repeated testing.

[0110] In some embodiments, the battery air tightness testing method further includes: after completing the second air tightness test, disposing of the batteries that fail the second air tightness test according to the scanning results of each battery in the incoming battery pack.

[0111] After the battery air tightness detection system of the embodiment of the present application completes scanning of the incoming battery pack, it will not immediately perform scanning and waste treatment, but will scan and waste treatment for the batteries that have passed the air tightness test. This can avoid repeated testing and improve efficiency.

[0112] The structure and working process of a battery air tightness detection system according to a specific embodiment of the present application are described in detail below with reference to FIG. 1 to FIG. 4 .

[0113] As shown in Figure 1, the battery air tightness detection system of this embodiment includes a loading rotary conveyor belt 100, a loading code scanning conveyor belt 200, a loading transfer conveyor belt 300, a loading conveyor belt 400, a loading robot 500, a first inspection module 600, a first unloading robot 700, a first-level unloading conveyor belt 800, a pressure test conveyor belt 900, an unloading buffer conveyor belt 1000, an unloading rotary conveyor belt 1100, a buffer platform 1600, a re-inspection matching platform 1700, a re-test chamber 1800, a re-test robot 2000, an unqualified battery conveyor belt 1900, a second-level unloading conveyor belt 1200, a second unloading robot 1400, an unloading matching platform 1300, and a buffer unloading conveyor belt 1500. The battery air tightness detection system of this embodiment is configured to perform air tightness and pressure tests on batteries after the top cover welding is completed, and to recycle unqualified batteries.

[0114] The battery air tightness testing system of this embodiment includes two initial inspection modules, namely a first initial inspection module 600a and a second initial inspection module 600b. The initial inspection module 600 includes multiple initial inspection chambers 610. Each initial inspection chamber 610 is configured to perform a first air tightness test on an incoming battery pack.

[0115] The loading robot 500 is configured to load the incoming battery pack into the first inspection chamber 610 of the first inspection module 600. The loading robot 500 includes multiple gripping parts, which operate simultaneously to simultaneously grab multiple batteries of the incoming battery pack.

[0116] The first unloading robot 700 is configured to unload incoming battery packs onto the first-stage unloading conveyor 800 or the buffer platform 1600 of the re-inspection module. Specifically, if the incoming battery pack is found to be a first-level qualified battery pack after inspection by the first inspection module 600, the first unloading robot 700 will grab the incoming battery pack and place it on the first-stage unloading conveyor 800. If the incoming battery pack is found to be a first-level unqualified battery pack after inspection by the first inspection module 600, the first unloading robot 700 will grab the incoming battery pack and place it on the buffer platform 1600 of the re-inspection module to await re-inspection.

[0117] The re-inspection module includes a buffer platform 1600, a re-inspection pairing platform 1700, a re-inspection chamber 1800, and a re-inspection robot 2000. The re-inspection module is configured to perform a second air-tightness test on the batteries of the battery pack that failed the first air-tightness test, i.e., the first unqualified battery pack. After the first unloading robot 700 transports the first unqualified battery pack to the buffer platform 1600, the re-inspection robot 2000 is configured to transport the batteries of the first unqualified battery pack to the re-inspection chamber 1800 for a second air-tightness test. Moreover, the re-inspection chamber 1800 tests each battery separately, so the batteries after testing are divided into second qualified batteries and second unqualified batteries. The re-inspection robot 2000 is configured to transport the second unqualified battery to the unqualified battery conveyor belt 1900 for waste disposal (NG). The re-inspection robot 2000 is also configured to transport the second qualified battery to the re-inspection pairing platform 1700 for pairing into groups. Then, the first unloading robot 700 transports the paired batteries from the re-inspection pairing platform 1700 to the first-level unloading conveyor belt 800 .

[0118] The first-level unloading conveyor belt 800 carries batteries that have passed the air-tightness test. Batteries that have passed the air-tightness test are transported by the first-level unloading conveyor belt 800 to the pressure test conveyor belt 900 for pressure testing. The batteries that have undergone the pressure test are sequentially transported to the unloading rotary conveyor belt 1100 through the unloading buffer conveyor belt 1000. The second unloading robot 1400 is configured to transport each battery to the second-level unloading conveyor belt 1200 or the unloading pairing platform 1300 according to the results of the pressure test. Specifically, the second unloading robot 1400 transports batteries that have passed the pressure test to the unloading pairing platform 1300 for pairing and grouping. The second unloading robot 1400 transports batteries that have failed the pressure test to the buffer unloading conveyor belt 1500 for waste disposal.

[0119] In this embodiment, the battery air tightness detection system is a battery helium detection system. Since helium has stable chemical properties, helium is used to detect the air tightness of the battery housing.

[0120] The entire working process of the battery air tightness detection system provided by the present application in this embodiment is described in detail below.

[0121] As shown in Figure 1, the incoming battery group is composed of four incoming batteries. The batteries after the top cover welding are transported into the feeding rotating conveyor belt 100, the loading code scanning conveyor belt 200, the loading transfer conveyor belt 300, and the loading conveyor belt 400. Then the loading robot 500 transfers the battery to the first inspection cavity 610 of the first inspection module 600 for the first air tightness test. If the incoming battery group passes the first air tightness test, the incoming battery group is the first qualified battery group and will be transferred by the first unloading robot 700 to the first-level unloading conveyor belt 800, and then transferred to the unloading rotating conveyor belt 1100 via the pressure test conveyor belt 900 and the unloading buffer conveyor belt 1000.

[0122] If the incoming battery pack fails to pass the first air tightness test, the incoming battery pack is the first unqualified battery pack and will be transferred to the buffer platform 1600 by the first unloading robot 700. The buffer platform 1600 will be moved horizontally to the material taking position of the re-test robot 2000 and taken away by the re-test robot 2000 and placed in the re-inspection chamber 1800 for a second air tightness test. In this embodiment, the re-inspection chamber 1800 includes two independently set sub-chambers, which are respectively configured to perform a second air tightness test on two batteries. If the two batteries in the re-inspection chamber 1800 pass the re-test, they will be transferred by the re-inspection robot 2000 to the re-inspection pairing platform 1700 for pairing and caching. After the pairing is completed, the pairing platform 1700 will be moved horizontally to the unloading position and then the first unloading robot 700 will place the battery into the first-level unloading conveyor belt 800 for normal unloading process. If both batteries with passing and failing retest results are present in retest chamber 1800, retest robot 2000 will prioritize transferring the failing batteries to the failing battery conveyor belt 1900 for disposal. Retest robot 2000 will then transfer the passing batteries to retest pairing platform 1700 for pairing and caching. Batteries that failed retest will be directly transferred by retest robot 2000 to the failing battery conveyor belt 1900 for disposal.

[0123] The unloading rotary conveyor 1100 sorts incoming batteries based on scanned barcodes or Hipot test results. If the result passes, it moves horizontally and rotates to dock with the second-stage unloading conveyor 1200. Once docked, the batteries are transferred to the second-stage unloading conveyor 1200, completing the unloading process.

[0124] If the result fails, the rotating pull belt traverse servo motor assembly moves horizontally to the transfer position, and the battery is removed by the second unloading robot 1400. After the second unloading robot 1400 completes the unloading, it sorts the four batteries according to the barcode scanning / Hipot test results. The second unloading robot 1400 preferentially places the batteries with passing barcode scanning / Hipot test results on the unloading pairing platform 1300 for pairing and caching. Then, the batteries with failing barcode scanning / Hipot test results are placed on the cache unloading conveyor belt 1500 for waste disposal.

[0125] As shown in Figures 2 and 3, the unloading and pairing platform 1300 includes a platform body 13001, a lifting mechanism 13002, and a transverse drive mechanism 13003. The platform body 13001 is configured to receive batteries that have passed the code scanning / Hipot test and are carried by the second unloading robot 1400. The lifting mechanism 13002 then lifts the batteries located in the platform body 13001. The transverse drive mechanism 13003 drives the lifting mechanism 13002 to fill the vacancies in the platform body 13001 with batteries, thus piecing together four batteries in a continuous position in the platform body 13001. After the sorting is completed, the platform body 13001 waits for the second unloading robot 1400 to remove the batteries, completing the unloading process.

[0126] When the unloading pairing platform 1300 completes pairing, the unloading rotary conveyor belt 1100 will move horizontally to the transfer position, waiting for the second unloading robot 1400 to take away the batteries that have completed pairing on the unloading pairing platform 1300 and place them in the unloading rotary conveyor belt 1100. The unloading rotary conveyor belt 1100 will then rotate and dock with the second-level unloading conveyor belt 1200 to complete the unloading process.

[0127] In this embodiment, the lifting mechanism 13002 is a lifting cylinder, and the transverse driving mechanism 13003 is a servo motor.

[0128] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery airtightness detection system, comprising: A first inspection module (600), configured to perform a first airtightness detection on a plurality of incoming battery packs, each of the incoming battery packs including a plurality of batteries. The battery packs inspected by the first inspection module (600) include a first qualified battery pack and a first unqualified battery pack. All the batteries in the first qualified battery pack pass the first airtightness detection, and at least one battery in the first unqualified battery pack fails the first airtightness detection; And At least two re-inspection modules, each of the re-inspection modules including a buffer platform (1600), a re-inspection chamber (1800), and a re-inspection manipulator (2000). The buffer platform (1600) is configured to receive and store the first unqualified battery pack. The re-inspection manipulator (2000) is configured to grab all the batteries of the first unqualified battery pack buffered by the buffer platform (1600) into the re-inspection chamber (1800). The re-inspection chamber (1800) is configured to perform an independent second airtightness detection on each battery of the first unqualified battery pack. The batteries inspected by the re-inspection chamber (1800) include second qualified batteries and second unqualified batteries.

2. The battery airtightness detection system according to claim 1, wherein, The re-inspection module further includes a re-inspection pairing platform (1700), and the re-inspection manipulator (2000) is configured to grab the second qualified batteries onto the re-inspection pairing platform (1700) for pairing into groups.

3. The battery airtightness detection system according to claim 2, the battery airtightness detection system further includes a first unloading manipulator (700) and a first-stage unloading conveyor belt (800). The first unloading manipulator (700) is configured to grab the second qualified battery pack onto the first-stage unloading conveyor belt (800) after a plurality of the second qualified batteries are paired on the re-inspection pairing platform (1700) to form a second qualified battery pack.

4. The battery airtightness detection system according to claim 3, the first unloading manipulator (700) is further configured to grab the first qualified battery pack onto the first-stage unloading conveyor belt (800) and grab the first unqualified battery pack onto the buffer platform (1600).

5. The battery airtightness detection system according to any one of claims 1 to 4, wherein, The at least two re-inspection modules include a first re-inspection module and a second re-inspection module arranged oppositely.

6. The battery airtightness detection system according to any one of claims 1 to 5, the battery airtightness detection system further includes at least two unqualified battery conveyor belts (1900). The at least two unqualified battery conveyor belts (1900) are arranged corresponding to the at least two re-inspection modules. The re-inspection manipulator (2000) is configured to grab the second unqualified batteries onto the at least two unqualified battery conveyor belts (1900).

7. The battery airtightness detection system according to any one of claims 1 to 6, the first inspection module includes a plurality of first inspection chambers, and the plurality of first inspection chambers are arranged corresponding to the plurality of incoming battery packs so that each first inspection chamber is configured to perform a first airtightness detection on the plurality of batteries of the incoming battery pack.

8. The battery airtightness detection system according to claim 7, wherein the battery airtightness detection system comprises at least two of the first inspection modules and a loading manipulator (500). The at least two first inspection modules include a first first inspection module (600a) and a second first inspection module (600b). The loading manipulator (500) is configured to load the plurality of incoming battery packs into the first first inspection module (600a) and the second first inspection module (600b), and to load the second first inspection module (600b) when at least two first inspection cavities of the first first inspection module (600a) are full of materials.

9. The battery airtightness detection system according to claim 1, wherein the battery airtightness detection system further comprises a qualified battery unloading conveyor belt (800), a withstand voltage test conveyor belt (900) arranged downstream of the qualified battery unloading conveyor belt (800), a second unloading manipulator (1400), and a unloading and pairing platform (1300). The qualified battery unloading conveyor belt (800) is configured to receive the batteries qualified in airtightness detection. The batteries qualified in airtightness detection include a plurality of batteries of a first qualified battery group and second qualified batteries. The withstand voltage test conveyor belt (900) is configured to perform a withstand voltage test on the batteries qualified in airtightness detection. The second unloading manipulator (1400) is configured to grab at least two batteries from the withstand voltage test conveyor belt (900) and place the batteries qualified in withstand voltage test on the unloading and pairing platform (1300) according to the test results of the withstand voltage test conveyor belt (900). The unloading and pairing platform (1300) is configured to receive the batteries qualified in withstand voltage test and pair them into groups.

10. The battery airtightness detection system according to claim 9, wherein, The second unloading manipulator (1400) comprises at least two grabbing parts correspondingly arranged with the at least two batteries. The at least two grabbing parts are arranged in sequence in the arrangement direction of the at least two batteries. The at least two batteries include the batteries qualified in withstand voltage test and the batteries unqualified in withstand voltage test. The second unloading manipulator (1400) is configured to control the grabbing part configured to grab the batteries qualified in withstand voltage test to open so as to place the batteries qualified in withstand voltage test on the unloading and pairing platform (1300), and to control the grabbing part configured to grab the batteries unqualified in withstand voltage test to close so as to continue to grab the batteries unqualified in withstand voltage test.

11. The battery airtightness detection system according to claim 10, wherein the unloading and pairing platform (1300) comprises a platform body (13001) and a lifting mechanism (13002). The platform body (13001) is configured to place the batteries qualified in withstand voltage test placed by the second unloading manipulator (1400). When there are empty spaces between the plurality of batteries qualified in withstand voltage test, the lifting mechanism (13002) lifts at least some of the plurality of batteries qualified in withstand voltage test upward and laterally so that the plurality of batteries qualified in withstand voltage test are arranged in sequence on the platform body (13001).

12. The battery airtightness detection system according to any one of claims 1 to 11, wherein the battery airtightness detection system further includes a feeding and code-scanning conveyor belt (200), and the feeding and code-scanning conveyor belt (200) is configured to perform code-scanning on each battery of the incoming battery pack before the incoming battery pack is fed into the first inspection module (600).

13. The battery airtightness detection system according to claim 12, wherein the battery airtightness detection system further includes a qualified battery discharging conveyor belt (800), a second discharging manipulator (1400), and a discharging and pairing platform (1300). The qualified battery discharging conveyor belt (800) is configured to receive the batteries that pass the airtightness detection. The second discharging manipulator (1400) is configured to carry the batteries that pass the airtightness detection according to the code-scanning result of the feeding and code-scanning conveyor belt (200). The second discharging manipulator (1400) carries the batteries with qualified code-scanning to the discharging and pairing platform (1300) for pairing and grouping.

14. The battery airtightness detection system according to any one of claims 1 to 13, wherein, The re-inspection chamber (1800) includes at least two sub-re-inspection chambers, and each sub-re-inspection chamber is configured to perform airtightness detection on a single battery.

15. The battery airtightness detection system according to claim 2, wherein, The re-inspection and pairing platform (1700) includes a plurality of receiving grooves, and the plurality of receiving grooves are configured to store batteries. Each receiving groove is provided with a sensor, and the sensor is used to detect the number of batteries stored in the corresponding receiving groove.

16. The battery airtightness detection system according to claim 4, wherein, The first discharging manipulator (700) includes a plurality of grasping parts, and each grasping part is configured to grasp one battery.

17. A battery airtightness detection method based on the battery airtightness detection system according to any one of claims 1 to 16, comprising the following steps: Controlling the first inspection module to work to perform the first airtightness detection on a plurality of incoming battery packs. The battery packs passing through the first inspection module (600) include a first qualified battery pack and a first unqualified battery pack. All the batteries in the first qualified battery pack pass the first airtightness detection, and at least one battery in the first unqualified battery pack fails the first airtightness detection. Grasping each battery of the first unqualified battery pack into the re-inspection chamber (1800) of the at least two re-inspection modules for independent second airtightness detection. The batteries passing through the re-inspection chamber (1800) include second qualified batteries and second unqualified batteries.

18. The battery airtightness detection method according to claim 17, wherein, The battery airtightness detection system includes a first first inspection module and a second first inspection module, and the battery airtightness detection method further includes: Feeding a plurality of incoming battery packs into the first first inspection module and the second first inspection module, and feeding into the second first inspection module (600b) when at least two first inspection chambers of the first first inspection module (600a) are full.

19. The battery airtightness detection method according to claim 17, wherein, The battery airtightness detection method includes: Performing code-scanning on each battery of the incoming battery pack before feeding the incoming battery pack into the first inspection module.

20. The battery airtightness detection method according to claim 19, wherein the battery airtightness detection method further includes: After the second airtightness test is completed, the batteries with unqualified scanning codes among the second qualified batteries are scrapped according to the scanning code results of each battery of the incoming battery pack.

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