Battery airtightness detection system and method

Abstract

The invention provides a battery airtightness detection system and method, and the system comprises a first detection module and at least two redetection modules, the first detection module is used for carrying out the first airtightness detection of a plurality of incoming battery packs, and each incoming battery pack comprises a plurality of batteries. The battery pack detected by the first detection module comprises a first qualified battery pack and a first unqualified battery pack, the redetection module comprises a cache platform, a redetection cavity and a redetection manipulator, and the cache platform is used for receiving and storing the first unqualified battery pack; the re-inspection manipulator is used for grabbing the batteries of the first unqualified battery pack cached by the caching platform into the re-inspection cavity, the re-inspection cavity is used for performing independent secondary air tightness detection on each battery of the first unqualified battery pack, and the batteries detected by the re-inspection cavity comprise second qualified batteries and second unqualified batteries. The at least two reinspection modules work in parallel, so that the reinspection processing capability of the battery airtightness detection system is improved, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and relates to a battery airtightness detection system and method. Background Art

[0002] During the use of lithium batteries, if the sealing performance of the lithium battery shell is poor, problems such as liquid leakage and swelling will occur, resulting in certain potential safety hazards in the use of lithium batteries. Therefore, the airtightness detection of lithium batteries is an important link in the lithium battery production process.

[0003] As an important link in the lithium battery production process, how to improve the efficiency of lithium battery airtightness detection is an urgent problem to be solved. Summary of the Invention

[0004] In view of the above problems, this application provides a battery airtightness detection system and method to improve the detection efficiency.

[0005] In a first aspect, this application provides a battery airtightness detection system, including a first inspection module and at least two re-inspection modules. The first inspection module is used to perform the first airtightness detection on multiple incoming battery groups. Each incoming battery group includes multiple batteries. The battery groups detected 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 airtightness detection, and at least one battery in the first unqualified battery group fails the first airtightness detection. The re-inspection module includes a buffer platform, a re-inspection chamber, and a re-inspection manipulator. The buffer platform is used to receive and store the first unqualified battery group. The re-inspection manipulator is used to grab all the batteries of the first unqualified battery group cached on the buffer platform into the re-inspection chamber. The re-inspection chamber is used to perform independent second airtightness detection on each battery of the first unqualified battery group. The batteries detected by the re-inspection chamber include second qualified batteries and second unqualified batteries.

[0006] In the technical solution of this application, at least two re-inspection modules are set to perform the second airtightness detection on the batteries of the first unqualified battery group. The at least two re-inspection modules work in parallel, thereby improving the re-inspection processing ability of the battery airtightness detection system and improving the production efficiency. Moreover, each re-inspection module includes its own re-inspection manipulator, so that at least two re-inspection chambers can work in parallel at the same time, avoiding the problem that at least two re-inspection chambers can only work serially due to the limited number of re-inspection manipulators, and further improving the detection efficiency.

[0007] In some embodiments, the re-inspection module further includes a re-inspection pairing platform, and the re-inspection manipulator is configured to grab the second qualified batteries to the re-inspection pairing platform for pairing into groups.

[0008] 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 caching work and the pairing work run independently, reducing the conflict of the action process and improving the fault tolerance rate.

[0009] In some embodiments, the battery airtightness detection system further includes a first blanking manipulator and a first-stage blanking conveyor belt. The first blanking manipulator is configured to grab the second qualified battery group onto the first-stage blanking conveyor belt after multiple second qualified batteries are paired on the re-inspection pairing platform to form a second qualified battery group.

[0010] In the embodiment of the present application, the re-inspection manipulator and the first-stage blanking manipulator are respectively provided to perform the re-inspection work and the blanking work, so that the re-inspection work and the blanking work can be carried out in parallel, improving the overall production rhythm and production efficiency.

[0011] In some embodiments, the first blanking manipulator is further configured to grab the first qualified battery group onto the first-stage blanking conveyor belt and grab the first unqualified battery group onto the cache platform.

[0012] The first blanking manipulator of the embodiment of the present application is used for transferring the incoming battery group that has passed the first airtightness detection to the next process according to the detection result, and the processing flow is simple.

[0013] In some embodiments, at least two re-inspection modules include a first re-inspection module and a second re-inspection module that are oppositely arranged.

[0014] At least two re-inspection modules of the embodiment of the present application are oppositely arranged, so that the structure of the battery airtightness detection system of the embodiment of the present application is compact. Moreover, this makes the moving path of the first blanking manipulator basically the same whether the first unqualified battery group output from the first inspection module is transported to the first re-inspection module for the second airtightness detection or transported to the second re-inspection module for the second airtightness detection, thereby reducing the complexity of the control method.

[0015] In some embodiments, the battery airtightness detection system further includes at least two unqualified battery conveyor belts. The at least two unqualified battery conveyor belts are correspondingly arranged with at least two re-inspection modules. The re-inspection manipulator is configured to grab the second unqualified battery onto the at least two unqualified battery conveyor belts.

[0016] The battery airtightness detection system of the embodiment of the present application is provided with at least two unqualified battery conveyor belts, and each unqualified battery conveyor belt corresponds to a re-inspection module. In this way, the batteries unqualified in the re-inspection module can be flexibly processed, the total cache is increased, and the waste discharge processing capacity is enhanced.

[0017] In some embodiments, the first inspection module includes a plurality of first inspection chambers, and the plurality of first inspection chambers are correspondingly arranged with a plurality of incoming battery packs so that each first inspection chamber is used to perform the first airtightness inspection on a plurality of batteries of the incoming battery pack.

[0018] The first inspection module of the embodiment of the present application includes a plurality of first inspection chambers, and each first inspection chamber corresponds to an incoming battery pack, so that the plurality of incoming battery packs conveyed can be transferred into the plurality of first inspection chambers for the first airtightness inspection, thereby improving the processing capacity of the battery airtightness inspection system of the embodiment of the present application.

[0019] In some embodiments, the battery airtightness inspection system includes at least two first inspection modules and a loading manipulator. The at least two first inspection modules include a first first inspection module and a second first inspection module. The loading manipulator is configured to load a plurality of incoming battery packs into the first first inspection module and the second first inspection module, and load the second first inspection module when at least two first inspection chambers of the first first inspection module are full.

[0020] When loading, the loading manipulator of the embodiment of the present application first judges whether the first first inspection module is full. Only when the first first inspection module is full, will it load the second first inspection module, which can avoid the idle of the first inspection chambers of the first inspection module and thus ensure the processing efficiency.

[0021] In some embodiments, the battery airtightness inspection system further includes a qualified battery unloading conveyor belt, a withstand voltage test conveyor belt arranged downstream of the qualified battery unloading conveyor belt, a second unloading manipulator, and an unloading pairing platform. The qualified battery unloading conveyor belt is used to receive the batteries that pass the airtightness inspection. The batteries that pass the airtightness inspection include a plurality of batteries of the first qualified battery pack and the second qualified battery. The withstand voltage test conveyor belt is used to perform a withstand voltage test on the batteries that pass the airtightness inspection. The second unloading manipulator is used to grab at least two batteries from the withstand voltage test conveyor belt and place the batteries that pass the withstand voltage test on the unloading pairing platform according to the test results of the withstand voltage test conveyor belt. The unloading pairing platform is used to receive the batteries that pass the withstand voltage test and pair them into groups.

[0022] Through the cooperation of the second unloading manipulator and the unloading pairing platform, the battery airtightness inspection system of the embodiment of the present application caches and pairs the batteries that pass the withstand voltage test on the unloading pairing platform, while the batteries that fail the withstand voltage test are directly discharged as waste by the second unloading manipulator. This setting improves the process effectiveness and reduces the waste of the pull belt cache position.

[0023] In some embodiments, the second blanking manipulator includes at least two grasping parts corresponding to at least two batteries. The at least two grasping parts are arranged in sequence in the arrangement direction of the at least two batteries. The at least two batteries include batteries that have passed the withstand voltage test and batteries that have failed the withstand voltage test. The second blanking manipulator is configured to control the grasping part for grasping the batteries that have passed the withstand voltage test to open so as to place the batteries that have passed the withstand voltage test on the blanking pairing platform, and control the grasping part for grasping the batteries that have failed the withstand voltage test to close so as to continue grasping the batteries that have failed the withstand voltage test.

[0024] The second blanking manipulator in the embodiments of the present application grabs the batteries that have passed the withstand voltage test and the batteries that have failed the withstand voltage test simultaneously, which can avoid repeated grasping and improve efficiency. Moreover, it also avoids caching the batteries that have failed the withstand voltage test on the pulling belt, reducing the waste of the caching position of the pulling belt.

[0025] In some embodiments, the blanking pairing platform includes a platform body and a lifting mechanism. The platform body is used to place the batteries that have passed the withstand voltage test placed by the second blanking manipulator. When there are vacancies between multiple batteries that have passed the withstand voltage test, the lifting mechanism lifts at least some of the multiple batteries that have passed the withstand voltage test upward and laterally so that the multiple batteries that have passed the withstand voltage test are arranged in sequence on the platform body.

[0026] The blanking pairing platform in the embodiments of the present application sets a lifting mechanism to perform lifting and translation actions on the batteries to fill the vacancies in the platform body, thereby completing the sorting and pairing of multiple batteries, which is beneficial to the discharging process of the battery pack.

[0027] In some embodiments, the battery airtightness detection system further includes a feeding and code-scanning conveyor belt, which is used to perform code-scanning processing on each battery of the incoming battery pack before the incoming battery pack is fed into the first inspection module.

[0028] The battery airtightness detection system in the embodiments of the present application performs code-scanning processing on the incoming battery pack before feeding, but does not perform code-scanning waste discharge processing on the batteries with unqualified code-scanning before feeding. This avoids the process waste caused by discharging the entire battery pack due to individual batteries with unqualified code-scanning results in a group of batteries, and thus improves the problem of low efficiency caused by repeated detection.

[0029] In some embodiments, the battery airtightness detection system further includes a qualified battery blanking conveyor belt, a second blanking manipulator, and a blanking pairing platform. The qualified battery blanking conveyor belt is used to receive the batteries that have passed the airtightness test. The second blanking manipulator is used to transport the batteries that have passed the airtightness test according to the code-scanning results of the feeding and code-scanning conveyor belt. The second blanking manipulator transports the batteries with qualified code-scanning to the blanking pairing platform for pairing into groups.

[0030] After the battery airtightness detection system according to the embodiment of the present application completes scanning the incoming battery pack, it does not perform the scanning and waste discharging process immediately. Instead, it performs the scanning and waste discharging process on the batteries that pass the airtightness test, which can avoid repeated detections and improve efficiency.

[0031] In a second aspect, the present application provides a battery airtightness detection method based on the above battery airtightness detection system, including the following steps:

[0032] Control the first inspection module to work to perform the first airtightness detection on multiple incoming battery packs. The battery packs detected by the first inspection module include the first qualified battery packs and the first unqualified battery packs. All the batteries in the first qualified battery packs pass the first airtightness detection, and at least one battery in the first unqualified battery packs fails the first airtightness detection; Grab each battery of the first unqualified battery pack into the re-inspection cavities of at least two re-inspection modules for independent second airtightness detection. The batteries detected by the re-inspection cavities include the second qualified batteries and the second unqualified batteries.

[0033] The battery airtightness detection method according to the embodiment of the present application uses at least two re-inspection modules to perform the second airtightness detection on the batteries of the first unqualified battery pack. The at least two re-inspection modules work in parallel, thereby improving the re-inspection processing ability of the battery airtightness detection system and improving production efficiency.

[0034] In some embodiments, the battery airtightness detection system includes a first first-inspection module and a second first-inspection module. The battery airtightness detection method further includes loading multiple incoming battery packs onto the first first-inspection module and the second first-inspection module, and loading onto the second first-inspection module only when at least two first-inspection cavities of the first first-inspection module are full of materials.

[0035] The loading manipulator according to the embodiment of the present application determines whether the first first-inspection module is full of materials during loading. Only when the first first-inspection module is full of materials, will it load onto the second first-inspection module, which can avoid the first-inspection cavities of the first-inspection module being idle and thus ensure the processing efficiency.

[0036] In some embodiments, the battery airtightness detection method includes performing a scanning process on each battery of the incoming battery pack before loading the incoming battery pack onto the first-inspection module.

[0037] The battery airtightness detection system according to the embodiment of the present application performs a scanning process on the incoming battery pack before loading, but does not perform the scanning and waste discharging process on the batteries with unqualified scanning before loading. This avoids the process waste caused by performing the scanning and waste discharging process on the entire battery pack due to individual batteries with unqualified scanning results in a group of batteries, and thus improves the problem of low efficiency caused by repeated detections.

[0038] In some embodiments, the battery airtightness detection method further includes: after the second airtightness detection is completed, waste treatment is performed on the batteries with unqualified scanning codes among the second qualified batteries according to the scanning code results of the batteries in the incoming battery pack.

[0039] After the battery airtightness detection system of the embodiment of the present application completes the scanning of the incoming battery pack, it does not perform waste treatment for scanning codes immediately. Instead, waste treatment for scanning codes is performed on the batteries that pass the airtightness test, which can avoid repeated detection and improve efficiency.

[0040] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Brief Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0043] Figure 1 is a structural block diagram of a battery airtightness detection system according to some embodiments of the present application;

[0044] Figure 2 is a structural schematic diagram of a state of a blanking and pairing platform according to some embodiments of the present application;

[0045] Figure 3 is a structural schematic diagram of another state of the blanking and pairing platform according to some embodiments of the present application

[0046] Figure 4 is a step schematic diagram of a battery airtightness detection method according to some embodiments of the present application;

[0047] In the drawings, the drawings are not drawn to actual scale.

[0048] Marking Explanation:

[0049] Feeding rotary conveyor belt 100;

[0050] Feeding scanning code conveyor belt 200;

[0051] Feeding transfer conveyor belt 300;

[0052] Feeding conveyor belt 400;

[0053] Feeding manipulator 500;

[0054] First inspection module 600, first first inspection module 600a, second first inspection module 600b;

[0055] First blanking manipulator 700;

[0056] First-stage blanking conveyor belt 800;

[0057] Pressure resistance test conveyor belt 900;

[0058] Blanking buffer conveyor belt 1000;

[0059] Blanking rotary conveyor belt 1100;

[0060] Second-stage blanking conveyor belt 1200;

[0061] Blanking pairing platform 1300, platform body 13001, lifting mechanism 13002, translation mechanism 13003;

[0062] Second blanking manipulator 1400;

[0063] Buffer blanking conveyor belt 1500;

[0064] Buffer platform 1600;

[0065] Re-inspection pairing platform 1700;

[0066] Re-inspection chamber 1800;

[0067] Unqualified battery conveyor belt 1900;

[0068] Re-inspection manipulator 2000. Detailed implementation manners

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field 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 accompanying drawings are intended to cover non-exclusive inclusion.

[0070] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two unless otherwise specifically defined.

[0071] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0073] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0074] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0076] A battery generally includes a housing, a top cover, and an electrode assembly accommodated in the housing. The housing and the top cover are welded to ensure the sealing of the battery. To ensure that the sealing of the battery meets the requirements, it is necessary to inspect the welding quality between the housing and the top cover. Usually, a battery airtightness detection system is used to detect the airtightness of the battery.

[0077] The detection efficiency of the battery airtightness detection system in the related art is relatively low and cannot meet higher production requirements.

[0078] To improve the detection efficiency, an embodiment of the present application provides a battery airtightness detection system. The battery airtightness detection system of this embodiment improves the re-inspection processing ability of the battery airtightness detection system and the production efficiency by setting at least two re-inspection modules, so that multiple batteries of the battery pack that fail the first inspection by the first inspection module can be secondarily detected by at least two re-inspection modules, and the at least two re-inspection modules work in parallel.

[0079] Reference Figure 1 Referring to, the battery airtightness 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 used to perform the first airtightness detection on multiple incoming battery packs. Each incoming battery pack includes multiple batteries. The battery packs inspected by the first inspection module 600 include a first qualified battery pack and a first unqualified battery pack. All batteries in the first qualified battery pack pass the first airtightness detection. At least one battery in the first unqualified battery pack fails the first airtightness detection. The re-inspection module includes a buffer platform 1600, a re-inspection chamber 1800, and a re-inspection manipulator 2000. The buffer platform 1600 is used to receive and store the first unqualified battery pack. The re-inspection manipulator 2000 is used to grab all the batteries of the first unqualified battery pack cached on the buffer platform 1600 into the re-inspection chamber 1800. The re-inspection chamber 1800 is used 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.

[0080] The first inspection module 600 of the embodiment of the present application is used to perform the first airtightness detection on multiple incoming battery packs. The incoming battery pack means that multiple batteries are transported in a grouped manner. For example, four batteries form an incoming battery pack and are loaded by a manipulator or other clamping tools. In a specific embodiment, taking the incoming battery pack formed by four batteries as an example for illustration, it can be understood that five batteries or six batteries can also be used as a group for detection, or other quantities can be used as a group, which is not limited herein. On the other hand, when the first inspection module 600 of the embodiment of the present application performs the first airtightness detection, it detects a group of batteries simultaneously. Thus, if the airtightness of all batteries in an incoming battery pack is qualified, the incoming battery pack is determined to be the first qualified battery pack. If the airtightness of any one battery in an incoming battery pack is unqualified, the incoming battery pack is determined to be the first unqualified battery pack.

[0081] In Figure 1In the specific embodiment shown, the first inspection module 600 includes four first inspection chambers 610. Each first inspection chamber 610 is used to detect the airtightness of an incoming battery pack. In other embodiments, the first inspection module 600 may include any number of first inspection chambers 610.

[0082] After the first airtightness inspection by the first inspection module 600, the buffer platform 1600 is used to receive and store the first non-conforming battery packs. Since the airtightness of at least one battery in the first non-conforming battery packs is unqualified, it is necessary to perform a second inspection on the airtightness of each battery. The re-inspection manipulator 2000 is used to grab the batteries of the first non-conforming battery packs on the buffer platform 1600 and place them in the re-inspection chamber 1800 for the second airtightness inspection. In order to accurately identify the batteries with unqualified airtightness, during the second airtightness inspection, the re-inspection chamber 1800 independently inspects each battery of the first non-conforming battery packs. For example, in some embodiments, the re-inspection chamber 1800 includes at least two sub-re-inspection chambers, and each sub-re-inspection chamber is used to detect the airtightness of a single battery. After the re-inspection chamber 1800 finishes the inspection, the second qualified batteries and the second unqualified batteries can be identified. Thus, the second unqualified batteries can be directly discharged as waste.

[0083] In the technical solution of the embodiment of the present application, by setting at least two re-inspection modules to perform the second airtightness inspection on the batteries of the first non-conforming battery packs, the at least two re-inspection modules work in parallel, thereby improving the re-inspection processing ability of the battery airtightness detection system and improving the 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 serially due to the limited number of re-inspection manipulators 2000, and further improving the detection efficiency. In addition, each re-inspection module includes its own buffer platform 1600, increasing the number of batteries that can be cached and improving the processing ability of the detection system.

[0084] In some embodiments, the re-inspection module further includes a re-inspection pairing platform 1700. The re-inspection manipulator 2000 is configured to grab the second qualified batteries and place them on the re-inspection pairing platform 1700 for pairing into groups.

[0085] The re-inspection pairing platform 1700 pairs and groups the batteries that have passed the inspection by the re-inspection chamber 1800, which facilitates the grouped blanking of qualified batteries. Compared with the blanking of a single qualified battery, the blanking efficiency can be improved. For example, in some embodiments, when four qualified batteries are blanked in a group, the batteries that have passed the inspection by the re-inspection chamber 1800 will be sequentially grabbed by the re-inspection manipulator 2000 and placed on the re-inspection pairing platform 1700. After four qualified batteries are paired into a group, they will be blanked together. For example, in a specific embodiment, the re-inspection pairing platform has a plurality of receiving slots for storing batteries. Sensors are arranged in the receiving slots to obtain the number of stored batteries. When the number of batteries forms a group, the manipulator can directly grab and blank the grouped battery pack.

[0086] In the embodiment of the present application, the re-inspection module is provided with a re-inspection pairing platform 1700 independent of the buffer platform 1600, so that the buffering work and the pairing work run independently, reducing the conflict of the action process and improving the fault tolerance rate.

[0087] In some embodiments, the battery airtightness detection system further includes a first blanking manipulator 700 and a first-stage blanking conveyor belt 800. The first blanking manipulator 700 is configured to grab the second qualified battery group onto the first-stage blanking conveyor belt 800 after a plurality of second qualified batteries are paired on the re-inspection pairing platform 1700 to form a second qualified battery group.

[0088] Reference Figure 1 , after the batteries that have passed the second airtightness inspection by the re-inspection chamber 1800 are grabbed by the re-inspection manipulator 2000 and paired into a group on the re-inspection pairing platform 1700, the first blanking manipulator 700 is used to grab the grouped batteries onto the first-stage blanking conveyor belt 800.

[0089] In the embodiment of the present application, the re-inspection manipulator 2000 and the first-stage blanking manipulator 700 are respectively arranged to perform the re-inspection work and the blanking work, so that the re-inspection work and the blanking work can be carried out in parallel, improving the overall production rhythm and production efficiency.

[0090] In some embodiments, the first blanking manipulator 700 is further configured to grab the first qualified battery group onto the first-stage blanking conveyor belt 800 and grab the first unqualified battery group onto the buffer platform 1600.

[0091] When the first blanking manipulator 700 transfers and transports the batteries, it does so in a grouped manner. That is, the first blanking manipulator 700 can transfer a battery group of incoming materials at one time. Specifically, the first blanking manipulator 700 includes a plurality of grasping parts, and each grasping part is used to grasp one battery.

[0092] The first blanking manipulator 700 of the embodiment of the present application is used to transfer the incoming battery packs that have passed the first airtightness test to the next process according to the detection results, and the processing flow is simple.

[0093] In some embodiments, at least two re-inspection modules include a first re-inspection module and a second re-inspection module that are oppositely arranged.

[0094] The opposite arrangement of the first re-inspection module and the second re-inspection module means that the first re-inspection module and the second re-inspection module are correspondingly arranged. For example, in Figure 1 the illustrated embodiment, the buffer platforms of the first re-inspection module and the second re-inspection module are oppositely arranged. The re-inspection pairing platforms of the first re-inspection module and the second re-inspection module are oppositely arranged. The re-inspection cavities of the first re-inspection module and the second re-inspection module are oppositely arranged.

[0095] At least two re-inspection modules of the embodiment of the present application are oppositely arranged, so that the structure of the battery airtightness detection system of the embodiment of the present application is compact. Moreover, this makes the moving path of the first blanking manipulator basically the same whether the first unqualified battery packs output from the first inspection module 600 are transported to the first re-inspection module for the second airtightness test or to the second re-inspection module for the second airtightness test, thereby reducing the complexity of the control method.

[0096] In some embodiments, 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 correspondingly arranged with 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.

[0097] The second unqualified batteries are the batteries that have been verified as airtightness unqualified after two airtightness tests. By setting at least two unqualified battery conveyor belts 1900 in the battery airtightness detection system of the embodiment of the present application, each unqualified battery conveyor belt corresponds to a re-inspection module, so that the unqualified batteries detected by the re-inspection module can be flexibly processed, the total buffer capacity is increased, and the waste discharge processing capacity is enhanced.

[0098] In some embodiments, referring to Figure 1 , the first inspection module 600 includes a plurality of first inspection cavities 610. The plurality of first inspection cavities 610 are correspondingly arranged with the plurality of incoming battery packs so that each first inspection cavity 610 is used to perform the first airtightness test on the multiple batteries of the incoming battery packs.

[0099] As Figure 1As shown, the first inspection module 600 includes a plurality of independently arranged first inspection cavities 610. Each first inspection cavity 610 can perform independent airtightness detection. And a supplied battery pack, that is, a plurality of batteries, is placed in each first inspection cavity 610. For example, in a specific embodiment, four batteries are placed in each first inspection cavity 610.

[0100] The first inspection module 600 of the embodiment of the present application includes a plurality of first inspection cavities 610, and each first inspection cavity 610 corresponds to a supplied battery pack. In this way, a plurality of supplied battery packs conveyed can be transferred into a plurality of first inspection cavities 610 for the first airtightness detection, thereby improving the processing capacity of the battery airtightness detection system of the embodiment of the present application.

[0101] In some embodiments, the battery airtightness detection system includes at least two 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 a plurality of supplied battery packs into the first first inspection module 600a and the second first inspection module 600b, and load the next supplied battery pack into the second first inspection module 600b when at least two first inspection cavities of the first first inspection module 600a are full.

[0102] The loading manipulator 500 is used to load a plurality of supplied battery packs conveyed into at least two first inspection modules for the first airtightness detection. Since each first inspection module includes a plurality of first inspection cavities, a plurality of supplied battery packs can be detected simultaneously. In order to make full use of the processing capacity of each first inspection module, when loading, it is necessary to judge the capacity of the previously loaded first inspection module. Only when the previously loaded first inspection module is full, the loading manipulator will continue to load the next first inspection module, so as to avoid the first inspection cavities of the first inspection module being empty and causing waste of processing capacity. For example, in a specific embodiment, the first inspection module 600 includes four first inspection cavities 610. Then when four first inspection cavities 610 of the first first inspection module 600a are all placed with supplied battery packs, the loading manipulator 500 will load the next supplied battery pack into the second first inspection module 600b.

[0103] The loading manipulator 500 of the embodiment of the present application judges whether the first first inspection module 600a is full when loading. Only when the first first inspection module 600a is full, will it load the second first inspection module 600b, so as to avoid the first inspection cavities of the first inspection module being idle and thus ensure the processing efficiency.

[0104] In some embodiments, the battery airtightness detection system further includes a qualified battery unloading conveyor belt 800. The qualified battery unloading conveyor belt 800 is used to receive the batteries that have passed the airtightness detection. The batteries that have passed the airtightness detection include a plurality of batteries of the first qualified battery group and the second qualified battery.

[0105] In some embodiments, the battery airtightness detection system further includes a withstand voltage test conveyor belt 900, a second blanking manipulator 1400, and a blanking pairing platform 1300 disposed downstream of the qualified battery blanking conveyor belt 800. The withstand voltage test conveyor belt 900 is used to perform a withstand voltage test (HIPOT test) on the batteries that have passed the airtightness detection. The second blanking manipulator 1400 is used to grab at least two batteries from the withstand voltage test conveyor belt 900 and place the batteries that have passed the withstand voltage test on the blanking pairing platform 1300 according to the test results of the withstand voltage test conveyor belt 900. The blanking pairing platform 1300 is used to receive the batteries that have passed the withstand voltage test and pair them into groups.

[0106] Reference Figure 1 , after detecting the airtightness of the battery, the qualified batteries will be placed on the qualified battery blanking conveyor belt 800. Further, the withstand voltage test conveyor belt 900 is also used to perform a withstand voltage test on the batteries, that is, the HIPOT test. After the withstand voltage test, the batteries that have passed the withstand voltage test will be discharged. The batteries that have failed the withstand voltage test will be output by the NG pull belt. The second blanking manipulator is used to grab at least two batteries from the withstand voltage test conveyor belt 900, which means that the second blanking manipulator 1400 will directly grab multiple batteries from the withstand voltage test conveyor belt 900. Among these multiple batteries, there are both batteries that have passed the withstand voltage test and batteries that have failed the withstand voltage test. Then, after grabbing, the second blanking manipulator 1400 moves to the blanking pairing platform 1300 and places the corresponding batteries that have passed the withstand voltage test on the blanking pairing platform 1300 according to the test results of the withstand voltage test conveyor belt 900, while grabbing the batteries that have failed the withstand voltage test to the NG blanking pull belt. For example, in a specific embodiment, the second blanking manipulator 1400 includes four grabbing parts, so that the second blanking manipulator 1400 can directly grab four batteries from the withstand voltage test conveyor belt 900. If two of the batteries are batteries that have passed the withstand voltage test and the other two batteries are batteries that have failed the withstand voltage test. In this way, when the second blanking manipulator 1400 moves above the blanking pairing platform 1300, the grabbing parts used to grab the batteries that have passed the withstand voltage test can be controlled to open, thereby releasing the batteries that have passed the withstand voltage test on the blanking pairing platform 1300. And the grabbing parts used to grab the batteries that have failed the withstand voltage test continue to maintain the grabbing state.

[0107] Through the cooperation of the second blanking manipulator 1400 and the blanking pairing platform 1300, the battery airtightness detection system of the embodiment of the present application caches and pairs the batteries that have passed the withstand voltage test on the blanking pairing platform 1300, while the batteries that have failed the withstand voltage test are directly discharged as waste by the second blanking manipulator 1400. This setting improves the process effectiveness and reduces the waste of the pull belt caching position.

[0108] In some embodiments, the second blanking manipulator 1400 includes at least two grasping parts correspondingly arranged with at least two batteries. The at least two grasping parts are sequentially arranged in the arrangement direction of the at least two batteries. The at least two batteries include batteries that have passed the withstand voltage test and batteries that have failed the withstand voltage test. The second blanking manipulator 1400 is configured to control the grasping part for grasping the batteries that have passed the withstand voltage test to open so as to place the batteries that have passed the withstand voltage test on the blanking pairing platform 1300, and control the grasping part for grasping the batteries that have failed the withstand voltage test to close so as to continue grasping the batteries that have failed the withstand voltage test.

[0109] The second blanking manipulator 1400 of the embodiments of the present application grabs the batteries that have passed the withstand voltage test and the batteries that have failed the withstand voltage test simultaneously, which can avoid repeated grabbing and improve efficiency. Moreover, it also avoids caching the batteries that have failed the withstand voltage test on the pull belt, reducing the waste of the cache position of the pull belt.

[0110] In some embodiments, referring to Figure 2 and Figure 3 , the blanking pairing platform 1300 includes a platform body 13001 and a lifting mechanism 13002. The platform body 13001 is used to place the batteries that have passed the withstand voltage test placed by the second blanking manipulator 1400. When there are vacant positions 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 laterally so that the multiple batteries that have passed the withstand voltage test are sequentially arranged on the platform body 13001.

[0111] As can be seen from the above description, the second blanking manipulator 1400 grabs the batteries that have passed the withstand voltage test and the batteries that have failed the withstand voltage test simultaneously. Then, among the multiple batteries grabbed by the second blanking manipulator 1400 simultaneously, at least two batteries that have passed the withstand voltage test are not necessarily adjacent to each other. In this way, when the second blanking manipulator 1400 controls the grasping part to open to place at least two batteries that have passed the withstand voltage test on the platform main body 13001, there may be vacant positions between the at least two batteries that have passed the withstand voltage test. When there are vacant positions, it is necessary to lift and translate a certain battery through the lifting mechanism 13002 so that the multiple batteries placed on the platform main 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 in the arrangement direction of the batteries.

[0112] In another embodiment, the platform main body 13001 has a plurality of storage slots. The plurality of storage slots are used to place a plurality of batteries. In this way, when at least two batteries that have passed the withstand voltage test are not placed adjacent to each other, there will be empty storage slots between the at least two batteries, which will affect the pairing and grouping of the batteries. Therefore, the embodiments of the present application realize the pairing and grouping of the batteries on the platform main body 13001 by setting the lifting mechanism 13002.

[0113] In the blanking and pairing platform 1300 of the embodiment of the present application, a lifting mechanism 13002 is provided to lift and translate the battery to fill the vacancies in the platform main body 13001, thereby completing the sorting and pairing of multiple batteries, which is beneficial to the discharging process of the battery pack.

[0114] In some embodiments, the battery airtightness detection system further includes a feeding and scanning conveyor belt 200. The feeding and scanning conveyor belt 200 is used to scan the batteries of the incoming battery pack before the incoming battery pack is fed into the first inspection module 600. After the scanning process, multiple incoming battery packs are all fed into the first inspection module 600.

[0115] The battery airtightness detection system of the embodiment of the present application performs a scanning process on the incoming battery pack before feeding, but does not perform a waste discharging process for the batteries with unqualified scanning before feeding. This avoids the process waste caused by discharging the entire battery pack due to individual batteries with unqualified scanning results in a group of batteries, thereby improving the problem of low efficiency caused by repeated detection.

[0116] Reference Figure 1 Referring to, in some embodiments, the battery airtightness detection system further includes a qualified battery blanking conveyor belt 800, a second blanking manipulator 1400, and a blanking and pairing platform 1300. The qualified battery blanking conveyor belt 800 is used to receive the batteries that pass the airtightness detection. The second blanking manipulator 1400 is used to transport the batteries that pass the airtightness detection according to the scanning results of the feeding and scanning conveyor belt 200. The second blanking manipulator 1400 transports the batteries with qualified scanning to the blanking and pairing platform 1300 for pairing into groups.

[0117] After the battery airtightness detection system of the embodiment of the present application completes the scanning of the incoming battery pack, it does not perform a waste discharging process for the scanned batteries immediately. Instead, it performs a waste discharging process for the batteries that pass the airtightness detection, which can avoid repeated detection and improve efficiency.

[0118] Reference Figure 4 The present application also provides a battery airtightness detection method for the battery airtightness detection system based on the above embodiments, including the following steps:

[0119] S40, controlling the first inspection module 600 to work to perform the first airtightness detection on multiple incoming battery packs. The battery packs detected 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

[0120] S50. Grasp each battery of the first unqualified battery pack into the re-inspection chambers 1800 of at least two re-inspection modules for independent second airtightness detection. The batteries detected by the re-inspection chambers 1800 include second qualified batteries and second unqualified batteries.

[0121] The battery airtightness detection method of the embodiment of the present application performs a second airtightness detection on the batteries of the first unqualified battery pack by using at least two re-inspection modules. The at least two re-inspection modules work in parallel, thereby improving the re-inspection processing ability of the battery airtightness detection system and improving production efficiency.

[0122] In some embodiments, the battery airtightness detection system includes a first initial inspection module and a second initial inspection module. The battery airtightness detection method further includes loading a plurality of incoming battery packs onto the first initial inspection module and the second initial inspection module, and loading the second initial inspection module 600b when at least two initial inspection chambers of the first initial inspection module 600a are full.

[0123] The loading manipulator 500 of the embodiment of the present application determines whether the first initial inspection module 600a is full during loading. Only when the first initial inspection module 600a is full, will it load the second initial inspection module 600b, which can avoid the initial inspection chambers of the initial inspection module being idle and thus ensure the processing efficiency.

[0124] In some embodiments, the battery airtightness detection method includes scanning the codes of each battery of the incoming battery pack before loading the incoming battery pack onto the initial inspection module.

[0125] The battery airtightness detection system of the embodiment of the present application performs code scanning on the incoming battery pack before loading, but does not perform code-scanning waste discharge on the batteries with unqualified code scanning before loading. This avoids the process waste caused by discharging the entire battery pack due to individual batteries with unqualified code scanning results in a group of batteries, and thus improves the problem of low efficiency caused by repeated detection.

[0126] In some embodiments, the battery airtightness detection method further includes: after completing the second airtightness detection, discharging the batteries with unqualified code scanning among the second qualified batteries according to the code scanning results of each battery of the incoming battery pack.

[0127] The battery airtightness detection system of the embodiment of the present application performs code scanning on the incoming battery pack before loading, but does not perform code-scanning waste discharge on the batteries with unqualified code scanning before loading. This avoids the process waste caused by discharging the entire battery pack due to individual batteries with unqualified code scanning results in a group of batteries, and thus improves the problem of low efficiency caused by repeated detection.

[0128] In some embodiments, the battery airtightness detection method further includes: after the second airtightness detection is completed, performing waste disposal on the batteries with unqualified scanning codes among the second qualified batteries according to the scanning code results of each battery in the incoming battery pack.

[0129] After the battery airtightness detection system of the embodiment of the present application finishes scanning the codes of the incoming battery pack, it does not perform waste disposal based on the scanning codes immediately. Instead, it performs waste disposal based on the scanning codes for the batteries that pass the airtightness test, which can avoid repeated detections and improve efficiency.

[0130] Next, according to Figures 1 to 4 The structure and working process of the battery airtightness detection system in a specific embodiment of the present application will be described in detail.

[0131] As Figure 1 shown, the battery airtightness 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 manipulator 500, a first inspection module 600, a first unloading manipulator 700, a first-stage unloading conveyor belt 800, a withstand voltage test conveyor belt 900, an unloading buffer conveyor belt 1000, an unloading rotary conveyor belt 1100, a buffer platform 1600, a re-inspection pairing platform 1700, a re-test cavity 1800, a re-test manipulator 2000, an unqualified battery conveyor belt 1900, a second-stage unloading conveyor belt 1200, a second unloading manipulator 1400, an unloading pairing platform 1300, and a buffer unloading conveyor belt 1500. The battery airtightness detection system of this embodiment is used to perform airtightness and withstand voltage tests on the batteries after the lid welding is completed, and recycle the batteries that fail the tests.

[0132] The battery airtightness detection system of this embodiment includes two first inspection modules, namely a first first inspection module 600a and a second first inspection module 600b. The first inspection module 600 includes a plurality of first inspection cavities 610. Each first inspection cavity 610 is used to perform the first airtightness detection on an incoming battery pack.

[0133] The loading manipulator 500 is used to load the incoming battery pack into the first inspection cavity 610 of the first inspection module 600. The loading manipulator 500 includes a plurality of grasping parts, and the plurality of grasping parts act simultaneously to grasp the plurality of batteries in the incoming battery pack at the same time.

[0134] The first blanking robot 700 is used to blank the incoming battery packs onto the first-stage blanking conveyor belt 800 or the buffer platform 1600 of the re-inspection module. Specifically, if the incoming battery pack is detected as a first qualified battery pack by the first inspection module 600, the first blanking robot 700 grabs the incoming battery pack onto the first-stage blanking conveyor belt 800. If the incoming battery pack is detected as a first unqualified battery pack by the first inspection module 600, the first blanking robot 700 grabs the incoming battery pack onto the buffer platform 1600 of the re-inspection module to wait for re-inspection.

[0135] 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 used to perform a second airtightness test on the batteries of the battery packs that failed the first airtightness test, i.e., the first unqualified battery packs. After the first blanking robot 700 transports the first unqualified battery pack to the buffer platform 1600, the re-inspection robot 2000 is used to transport the batteries of the first unqualified battery pack into the re-inspection chamber 1800 for the second airtightness test. Moreover, since the re-inspection chamber 1800 tests each battery separately, the tested batteries are divided into second qualified batteries and second unqualified batteries. The re-inspection robot 2000 is used to transport the second unqualified batteries to the unqualified battery conveyor belt 1900 for waste discharge (NG) treatment. The re-inspection robot 2000 is also used to transport the second qualified batteries to the re-inspection pairing platform 1700 for pairing into groups. Then the first blanking robot 700 transports the paired and grouped batteries on the re-inspection pairing platform 1700 to the first-stage blanking conveyor belt 800.

[0136] The batteries carried on the first-stage blanking conveyor belt 800 are all batteries that have passed the airtightness test. The batteries that have passed the airtightness test are conveyed by the first-stage blanking conveyor belt 800 to the withstand voltage test conveyor belt 900 for the withstand voltage test. The batteries after the withstand voltage test pass through the blanking buffer conveyor belt 1000 in sequence and reach the blanking rotary conveyor belt 1100. The second blanking robot 1400 is used to transport each battery to the second-stage blanking conveyor belt 1200 or the blanking pairing platform 1300 according to the results of the withstand voltage test. Specifically, the second blanking robot 1400 transports the batteries that have passed the withstand voltage test to the blanking pairing platform 1300 for pairing into groups. The second blanking robot 1400 transports the batteries that have failed the withstand voltage test to the buffer blanking conveyor belt 1500 for waste discharge treatment.

[0137] In this embodiment, the battery airtightness detection system is a battery helium detection system. Since the chemical properties of helium are stable, helium is used to detect the airtightness of the battery housing.

[0138] The entire working process of the battery airtightness detection system provided by the present invention in this embodiment will be described in detail below.

[0139] AsFigure 1 As shown, the incoming battery packs are grouped by four incoming batteries. The batteries after top cover welding are conveyed into the feeding area through the feeding rotary conveyor belt 100, the feeding code-scanning conveyor belt 200, the feeding transfer conveyor belt 300, and the feeding conveyor belt 400. Then, the feeding manipulator 500 transfers the batteries into the first inspection cavity 610 of the first inspection module 600 for the first airtightness test. If the incoming battery pack passes the first airtightness test, the incoming battery pack is the first qualified battery pack, and it will be transferred by the first discharging manipulator 700 to the first-stage discharging conveyor belt 800, and then transferred to the discharging rotary conveyor belt 1100 via the withstand voltage test conveyor belt 900 and the discharging buffer conveyor belt 1000.

[0140] If the incoming battery pack fails to pass the first airtightness test, the incoming battery pack is the first unqualified battery pack, and it will be transferred by the first discharging manipulator 700 to the buffer platform 1600. The buffer platform 1600 moves horizontally to the picking position of the retest manipulator 2000, and is picked up by the retest manipulator 2000 and placed into the retest cavity 1800 for the second airtightness test. In this embodiment, the retest cavity 1800 includes two independently arranged sub-cavities, which are respectively used for the second airtightness test of two batteries. If the two batteries in the retest cavity 1800 pass the retest, they will be transferred by the retest manipulator 2000 to the retest pairing platform 1700 for pairing and buffering. After the pairing on the pairing platform 1700 is completed, it moves horizontally to the discharging position, and then the first discharging manipulator 700 puts the batteries into the first-stage discharging conveyor belt 800 for the normal discharging process. If there are both batteries with passing retest results and batteries with failing retest results in the retest cavity 1800, the retest manipulator 2000 preferentially transfers the batteries with failing retest results to the unqualified battery conveyor belt 1900 for waste discharge treatment, and then transfers the batteries with passing retest results by the retest manipulator 2000 to the retest pairing platform 1700 for pairing and buffering. If the batteries with failing retest results will be directly transferred by the retest manipulator 2000 to the unqualified battery conveyor belt 1900 for waste discharge treatment.

[0141] The discharging rotary conveyor belt 1100 classifies the incoming batteries according to the code-scanning or Hipot test results. If the result passes, it moves horizontally and rotates to be docked with the second-stage discharging conveyor belt 1200. After the docking is completed, the batteries are conveyed to the second-stage discharging conveyor belt 1200 to complete the discharging process.

[0142] If the result fails, it is traversed to the transfer position by the rotating belt traversing servo motor assembly, and the second blanking manipulator 1400 takes away the battery. After the second blanking manipulator 1400 completes the material taking, it classifies and processes according to the scanning code / Hipot test results of the four batteries. The second blanking manipulator 1400 preferentially places the batteries that pass the scanning code / Hipot test on the blanking pairing platform 1300 for pairing and buffering, and then places the batteries that fail the scanning code / Hipot test on the buffer blanking conveyor belt 1500 for waste discharge treatment.

[0143] As Figure 2 and Figure 3 shown, the blanking pairing platform 1300 includes a platform body 13001, a lifting mechanism 13002, and a traversing drive mechanism 13003. The platform body 13001 is used to receive the batteries that pass the scanning code / Hipot test transported by the second blanking manipulator 1400. Then, the lifting mechanism 13002 jacks up the batteries located in the platform body 13001, and the traversing drive mechanism 13003 drives the lifting mechanism 13002 to fill the vacancies in the platform body 13001 with the batteries, forming four batteries with continuous positions in the platform body 13001. After sorting, it waits for the second blanking manipulator 1400 to take away the batteries and complete the pairing and discharging process.

[0144] When the blanking pairing platform 1300 completes the pairing, the blanking rotating conveyor belt 1100 traverses to the transfer position, waits for the second blanking manipulator 1400 to take away the batteries that complete the pairing on the blanking pairing platform 1300 and place them in the blanking rotating conveyor belt 1100, and then the blanking rotating conveyor belt 1100 rotates to dock with the second-stage blanking conveyor belt 1200 to complete the discharging process.

[0145] In this embodiment, the lifting mechanism 13002 is a lifting cylinder. The traversing drive mechanism 13003 is a servo motor.

[0146] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery airtightness detection system, comprising: A first inspection module (600) for performing a first airtightness inspection on a plurality of incoming battery packs. Each of the incoming battery packs includes 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 inspection, and at least one battery in the first unqualified battery pack fails the first airtightness inspection; And At least two re-inspection modules. The re-inspection module includes a buffer platform (1600), a re-inspection chamber (1800), and a re-inspection manipulator (2000). The buffer platform (1600) is used to receive and store the first unqualified battery pack. The re-inspection manipulator (2000) is used 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 used to perform an independent second airtightness inspection 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). 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, wherein 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, wherein 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 which are oppositely arranged.

6. The battery airtightness detection system according to any one of claims 1 to 5, wherein 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 correspondingly arranged with 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, wherein the first inspection module includes a plurality of first inspection chambers. The plurality of first inspection chambers are correspondingly arranged with the plurality of incoming battery packs so that each first inspection chamber is used to perform a first airtightness inspection 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 includes 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 includes a qualified battery unloading conveyor belt (800), a withstand voltage test conveyor belt (900) provided downstream of the qualified battery unloading conveyor belt (800), a second unloading manipulator (1400), and an unloading and pairing platform (1300). The qualified battery unloading conveyor belt (800) is used to receive the batteries that pass the airtightness detection. The batteries that pass the airtightness detection include a plurality of batteries of a first qualified battery group and a second qualified battery. The withstand voltage test conveyor belt (900) is used to perform a withstand voltage test on the batteries that pass the airtightness detection. The second unloading manipulator (1400) is used to grab at least two batteries from the withstand voltage test conveyor belt (900) and place the batteries that pass the 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 used to receive the batteries that pass the withstand voltage test and pair them into groups.

10. The battery airtightness detection system according to claim 9, wherein, The second unloading manipulator (1400) includes at least two grasping parts corresponding to the at least two batteries. The at least two grasping parts are arranged in sequence in the arrangement direction of the at least two batteries. The at least two batteries include the batteries that pass the withstand voltage test and the batteries that fail the withstand voltage test. The second unloading manipulator (1400) is configured to control the grasping part for grasping 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 and pairing platform (1300), and to control the grasping part for grasping the batteries that fail the withstand voltage test to close so as to continue grasping the batteries that fail the withstand voltage test.

11. The battery airtightness detection system according to claim 10, wherein the unloading and pairing platform (1300) includes a platform body (13001) and a lifting mechanism (13002). The platform body (13001) is used to place the batteries that pass the withstand voltage test placed by the second unloading manipulator (1400). When there are empty spaces between the plurality of batteries that pass the withstand voltage test, the lifting mechanism (13002) lifts at least some of the plurality of batteries that pass the withstand voltage test upward and laterally so that the plurality of batteries that pass the 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 comprises 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 comprises 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), and the second discharging manipulator (1400) carries the batteries with qualified code-scanning to the discharging and pairing platform (1300) for pairing and grouping.

14. A battery airtightness detection method based on the battery airtightness detection system according to claim 1, comprising the following steps: Controlling the first inspection module to work to perform a 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 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; Grabbing each battery of the first unqualified battery pack into the re-inspection cavities (1800) of the at least two re-inspection modules for independent second airtightness detection. The batteries passing through the re-inspection cavities (1800) include second qualified batteries and second unqualified batteries.

15. The battery airtightness detection method according to claim 14, wherein, The battery airtightness detection system includes a first first inspection module and a second first inspection module. The battery airtightness detection method further comprises 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 cavities of the first first inspection module (600a) are full of materials.

16. The battery airtightness detection method according to claim 14, 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.

17. The battery airtightness detection method according to claim 16, wherein the battery airtightness detection method further comprises: After the second airtightness detection is completed, waste treatment is performed on the batteries with unqualified code-scanning among the second qualified batteries according to the code-scanning results of each battery of the incoming battery pack.

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