CN221077963U - Air tightness detection device and battery production system - Google Patents

Abstract

The application provides an air tightness detection device and a battery production system, and relates to the technical field of batteries. The air tightness detection device comprises a detection carrier, a sealing assembly and an air tightness detection assembly, wherein the detection carrier is provided with a first chamber, a second chamber and a communication channel for communicating the first chamber with the second chamber, and the first chamber is provided with a taking and placing port; the sealing assembly comprises a first sealing piece and a second sealing piece, the first sealing piece is used for sealing the taking and placing port, and the second sealing piece is used for opening or closing the communication channel; the air tightness detection assembly is communicated with the first chamber. The air tightness detection device provided by the application can reduce the influence of the air tightness of the device on the air tightness detection process of the battery cell, and improves the accuracy of the air tightness detection of the battery cell.

Description

Air tightness detection device and battery production system

Technical Field

The application relates to the technical field of batteries, in particular to an air tightness detection device and a battery production system.

Background

The battery has wide application, and can be used for mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy automobiles, electric toy ships, electric toy airplanes, electric tools and the like.

The air tightness of the battery cell has a great influence on the performance of the battery, and how to improve the accuracy of the air tightness detection of the battery cell is one research direction in the battery technology.

Disclosure of utility model

The application provides an air tightness detection device and a battery production system, which can improve the accuracy of air tightness detection of battery monomers.

In a first aspect, the present application provides an air tightness detection device, comprising: the detection carrier is provided with a first chamber, a second chamber and a communication channel for communicating the first chamber with the second chamber, and the first chamber is provided with a taking and placing port; the sealing assembly comprises a first sealing piece and a second sealing piece, the first sealing piece is used for sealing the taking and placing port, and the second sealing piece is used for opening or closing the communication channel; the air tightness detection assembly is communicated with the first chamber.

According to the air tightness detection device, when the air tightness of the battery monomer is detected, the battery monomer can be firstly put into the second chamber from the taking and putting port of the first chamber through the first chamber and the communication channel, then the taking and putting port is sealed by the first sealing piece, the communication channel is closed by the second sealing piece, so that the first chamber and the second chamber are disconnected, the air tightness detection can be carried out on the first chamber by the air tightness detection assembly, after the air tightness of the first chamber is detected to be qualified, the communication channel is opened by the second sealing piece, the first chamber is communicated with the second chamber, and the air tightness of the battery monomer can be detected by the air tightness detection assembly. Because the gas tightness detection component is communicated with the first chamber, the taking and placing port of the battery monomer of the detection carrier is arranged in the first chamber, and the position where the gas tightness problem of the detection carrier is easy to occur is mainly concentrated in the first chamber. According to the application, the air tightness of the first chamber is detected firstly and then the air tightness of the battery cell is detected, and as the air tightness detection of the first chamber can be carried out after the battery cell is filled, and after the air tightness detection of the first chamber is finished, the air tightness detection of the battery cell can be carried out without opening or closing the taking and placing opening, so that the possibility of changing the air tightness of the whole detection carrier is reduced, the air tightness of the first chamber detected firstly can directly reflect the air tightness of the first chamber in the detection process of the battery cell, the influence of the air tightness of the detection carrier on the air tightness detection process of the battery cell is reduced, and the accuracy of the air tightness detection of the battery cell is improved.

In some embodiments, the seal assembly further comprises a first drive mechanism for moving the first seal to open or seal the access port. The first sealing element is driven to open and seal the taking and placing opening through the first driving mechanism, so that mechanization of the action of the first sealing element is realized, and the operation efficiency of air tightness detection is improved.

In some embodiments, the seal assembly further comprises a support assembly to which the first drive mechanism is mounted, the support assembly being mounted to the test carrier. The support assembly is configured, and the first driving mechanism is installed and supported by the support assembly, so that the first driving mechanism, the support assembly and the detection carrier are integrally connected, the integrity of the device is improved, and the stability of the first driving mechanism in the driving process is improved.

In some embodiments, the first driving mechanism includes a power member and a telescopic member, the power member is mounted to the support assembly and is in driving connection with the telescopic member, and the telescopic member is connected with the first sealing member. The telescopic piece can stretch out and draw back under the drive of power piece, and then drives first sealing piece and carry out the opening and close that gets the mouth of putting of straight line reciprocating motion, compares in other driving methods, and the straight line action can reduce the time that first sealing piece required in the action process, can improve the stability of first sealing piece in the removal in-process moreover.

In some embodiments, the support assembly comprises a support rod and a support base, the support rod is connected between the support base and the detection carrier, the power piece is installed on the support base, the telescopic piece is connected with a sliding piece, and the sliding piece is arranged on the support rod in a sliding mode. When the telescopic piece stretches out and draws back in a straight line, the sliding piece slides along the bracing piece, can play certain guiding effect to the flexible action of straight line of telescopic piece, can improve the stability of telescopic piece at the flexible in-process of straight line moreover, and then makes first sealing member can be more accurate to getting and put the mouth and seal the operation.

In some embodiments, the second seal is connected to the first seal and the first drive mechanism is configured to move the second seal and the first seal in synchronization. The first driving mechanism is utilized to drive the first sealing element and the second sealing element to act simultaneously, so that the power source required by the second sealing element for closing and opening the communication channel is reduced, the structure is simplified, and the cost is reduced.

In some embodiments, the sealing assembly further comprises a second driving assembly, the second driving assembly is located between the first sealing member and the second sealing member, the second sealing member is connected with the first sealing member through the second driving assembly, and the second driving assembly is used for driving the second sealing member to move so as to open or close the communication channel. Install the second sealing member between first sealing member and second sealing member, drive the second sealing member through second drive assembly and open the intercommunication passageway, realized the mechanization of second sealing member opening action, improved the operating efficiency that the gas tightness detected.

In some embodiments, the second drive assembly includes an electromagnetic assembly mounted to the first seal and a magnetic member slidably coupled to the first seal and coupled to the second seal. When the first sealing element moves to the sealing pick-and-place opening, the second sealing element can be synchronously driven to move to the position for sealing the communication channel. When the sealing of the communication channel is required to be released, the electromagnetic assembly and the magnetic piece are electrified, and then the electromagnetic assembly and the magnetic piece are attracted, so that the second sealing piece can be driven to open the communication channel, the action of opening the communication channel of the second sealing piece is realized by utilizing the magnetic attraction, and the electromagnetic device is simple in structure and rapid in action.

In some embodiments, the second drive assembly further comprises a normally compressed resilient member having one end connected to the first seal member and the other end connected to the second seal member. The normal pressure shrinkage of the elastic piece is beneficial to the second sealing piece to compress the communication channel, so that the sealing performance of the second sealing piece can be improved.

In some embodiments, the second drive assembly further comprises a second connector slidably coupled to the first seal; one end of the second connecting piece is connected with the magnetic piece, and the other end of the second connecting piece is connected with the second sealing piece; the elastic piece is sleeved on the second connecting piece. The second connecting piece is connected with the magnetic piece, the second connecting piece is in sliding connection with the first sealing piece, and when the magnetic piece is close to or far away from the electromagnetic assembly, the second connecting piece can play a role of sliding guide, so that the stability of the magnetic piece in the moving process is improved; simultaneously, with elastic component suit at the second connecting piece, can play the direction of compression and resilience to the elastic component, reduce the elastic component and appear other direction deformation except axial deformation.

In some embodiments, the first seal is provided with a receiving slot, and the electromagnetic assembly and the magnetic member are both mounted to the receiving slot. The accommodating groove is used as an installation base of the electromagnetic component and the magnetic piece, so that the installation space of the second driving component can be reduced, and the space utilization rate of the device is improved.

In some embodiments, a cavity is formed in the detection carrier, a partition board is circumferentially arranged on the inner wall of the cavity, a space between one side of the partition board and the picking and placing port is the first cavity, a space between the other side of the partition board and the bottom wall of the cavity is the second cavity, an opening is formed in the partition board, and the opening forms the communication channel. The first cavity, the second cavity and the communication channel are formed by arranging the partition plate in the cavity of the detection carrier, so that the structure is simple and easy to realize.

In some embodiments, a first sealing ring is arranged on the side, facing the communication channel, of the second sealing member, and the first sealing ring and the second sealing member jointly seal the communication channel. The first sealing ring is utilized to circumferentially surround and seal the communication channel, so that the leakage risk of the joint of the second sealing piece and the peripheral wall surface of the communication channel can be reduced, and compared with the mode of only connecting and sealing the second sealing piece and the communication channel, the sealing effect can be better.

In some embodiments, the test carrier is fitted with a second seal ring disposed about the access port and adapted for sealing engagement with the first seal. The second sealing ring is utilized to circumferentially surround and seal the pick-and-place opening, so that the leakage risk of the joint of the first sealing piece and the peripheral wall surface of the pick-and-place opening can be reduced, and compared with the mode of only connecting and sealing the second sealing piece and the communication channel, the second sealing ring has a better sealing effect.

In some embodiments, the air tightness detection assembly comprises an air inflation and deflation mechanism and an air pressure detection mechanism, which are respectively communicated with the first chamber. When the detection is carried out, the air charging and discharging mechanism can charge a certain amount of air into the first cavity, and then the air pressure detection mechanism is utilized to detect the air pressure change in the first cavity, so that the air tightness in the first cavity is obtained; after the detection is finished, the air is discharged by the air charging and discharging mechanism, so that the subsequent detection is to be carried out, and the detection process is simple and effective.

In a second aspect, an embodiment of the present application provides a battery production system, where the battery includes a battery monomer, and a liquid injection hole is provided on the battery monomer, and the battery production system includes a liquid injection device, a sealing device, and the air tightness detection device provided in any embodiment of the present application, where the liquid injection device is used to inject electrolyte into the battery monomer through the liquid injection hole; the sealing equipment is used for sealing the liquid injection hole, and the air tightness detection device is used for detecting the air tightness of the battery cell.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 schematically illustrates a schematic structural diagram of an air tightness detection device according to some embodiments of the present application;

fig. 2 schematically illustrates a front view of an air tightness detection device provided by some embodiments of the present application;

Fig. 3 schematically illustrates a schematic structural view of a first chamber and a second chamber of a detection carrier of an air-tightness detection device according to some embodiments of the present application;

FIG. 4 schematically illustrates a schematic structural view of a first seal, a second seal, an electromagnetic assembly, and a magnetic member of a gas tightness detection device provided by some embodiments of the present application;

Fig. 5 is an enlarged view of a portion a of fig. 1.

Reference numerals of the specific embodiments are as follows:

100. an air tightness detection device;

10. Detecting the carrier; 101. a second seal ring; 11. a first chamber; 111. a taking and placing port; 12. a second chamber; 13. a communication passage; 14. a partition plate;

20. A seal assembly; 21. a first seal; 211. a receiving groove; 22. a second seal; 221. a first seal ring; 23. a first driving mechanism; 231. a power member; 232. a telescoping member; 233. a slider; 24. a support assembly; 241. a support rod; 242. a support base; 25. a second drive assembly; 251. an electromagnetic assembly; 252. a magnetic member; 253. an elastic member; 254. a second connector;

30. An air tightness detection component; 31. an inflation and deflation mechanism; 311. an air pump; 312. a connecting pipeline; 3121. a gas filling and discharging port; 32. an air pressure detecting mechanism;

X, a first direction; y, second direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

The battery has the advantages of high energy density, recycling charging, safety, environmental protection and the like, and is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like. In the battery production process, various parameter performances of the battery need to be detected, and the air tightness detection is an essential ring in the battery detection. Taking a battery cell of a power battery as an example, it is necessary to perform air tightness detection by an air tightness detection device when detecting air tightness of the battery cell. The specific detection process of the air tightness of the battery monomer can be that the battery monomer is placed into an air tightness detection device, the air tightness detection device forms a closed space for accommodating the battery monomer after the battery is filled, then the closed space is inflated and pressurized for detection, and the detected air pressure change is utilized to acquire the air tightness of the battery monomer.

The detection mode needs to put the battery monomer into the air tightness detection device, so that the air tightness detection device needs to be provided with a taking-out and placing opening for placing and taking out the battery monomer, the tightness of the taking-out and placing opening after closing is unknown, if the air tightness of the taking-out and placing opening after closing is poor, the accuracy of the air tightness detection of the subsequent battery monomer can be affected undoubtedly, and the referenceability of the air tightness detection device is greatly reduced. For the problems, in some technologies, before the battery monomer is loaded, the taking and placing opening of the air tightness detection device is closed, then the closed space is separately detected to obtain the tightness of the closed space, but the mode is complex in operation, the taking and placing opening is required to be opened again after the detection, then the battery monomer is placed for detection, the air tightness of the opening after the opening and the closing cannot be determined, and the accuracy of the air tightness detection of the battery monomer is still affected.

In view of this, the present application provides an air tightness detecting apparatus configured to have two chambers that are communicable and independent, one of which is provided with a taking-out and putting-in port for taking out and putting in a battery cell, and the other of which is used for accommodating the battery cell. When detecting, can directly pack into the battery monomer, then make two cavities disconnection intercommunication, detect one of them cavity that has the mouth of putting of getting, can obtain the gas tightness of gas tightness detection device's whole cavity after getting to put the mouth and close, easy operation need not this mouth of putting of getting of secondary switching moreover, can improve the degree of accuracy that battery monomer gas tightness detected.

It should be noted that, the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

For the battery cell mentioned in this embodiment, the case, the electrode assembly, and the electrolyte are included, and the electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. Taking a lithium ion battery monomer as an example, the material of the positive electrode current collector can be aluminum, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The case may include a case body and an end cap, which refers to a member that is covered at an opening of the case body to isolate the inner environment of the battery cell from the outer environment. The case body is an assembly for mating with the end cap to form the internal environment of the battery cell. The case body and the end cap may be separate members, and an opening may be provided in the case body to form an internal environment of the battery cell by covering the opening with the end cap at the opening. The end cap and the shell body may be integrated, and in particular, the end cap and the shell body may form a common connection surface before other components are put into the shell, and when the interior of the shell body needs to be encapsulated, the end cap is covered on the shell body. The housing is typically provided with a fill port into which electrolyte may be injected, and a specific fill port may be provided on the end cap. When the battery cell is prepared, electrolyte can be injected into the shell through the liquid injection hole, and the liquid injection hole can be sealed through the sealing nail after the electrolyte is injected.

And, the above-mentioned battery may be used for an electric device, which may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

Fig. 1 schematically illustrates a structural schematic diagram of an air tightness detection device provided by some embodiments of the present application, fig. 2 schematically illustrates a front view of the air tightness detection device provided by some embodiments of the present application, and fig. 3 schematically illustrates structural schematic diagrams of a first chamber and a second chamber of a detection carrier of the air tightness detection device provided by some embodiments of the present application.

As shown in fig. 1, 2 and 3, the present embodiment provides an air tightness detection device 100, including a detection carrier 10, a sealing assembly 20 and an air tightness detection assembly 30, wherein the detection carrier 10 is provided with a first chamber 11, a second chamber 12 and a communication channel 13 communicating the first chamber 11 and the second chamber 12, and the first chamber 11 has a taking and placing port 111; the seal assembly 20 includes a first seal 21 for sealing the access port 111 and a second seal 22 for opening or closing the communication passage 13; the air tightness detection assembly 30 communicates with the first chamber 11.

The test carrier 10 of the present embodiment is mainly used to form the first chamber 11 and the second chamber 12, and can serve as a mounting base for the sealing member 20 and the air-tightness detecting member 30, so that the entire air-tightness detecting device 100 is formed as a whole. The structural form of the detection carrier 10 may be a rectangular bench-mounted structure as shown in fig. 1, or a frame-type structure having a chamber inside, as long as the first chamber 11 and the second chamber 12 can be formed, so that the specific structure and material of the detection carrier 10 are not excessively enumerated in this embodiment.

It should be noted that, the detection carrier 10 may be an integrally formed structure, so that the connection of the detection carrier 10 is less, which is beneficial to the tightness of the first chamber 11 and the second chamber 12. When the second chamber 12 and the first chamber 11 are integrally formed, only one portion of the communication channel communicating with the first chamber 11 may be opened in the second chamber 12, and no connection portion exists in other portions, so that in the air tightness detection process of the battery cell, the second chamber 12 may be considered to have no sealing problem.

The first chamber 11 of the present embodiment is provided with a pick-and-place port 111, the pick-and-place port 111 is used for storing and taking out an object to be measured such as a battery cell, and the battery cell entering the first chamber 11 from the pick-and-place port 111 enters the second chamber 12 through the communication channel 13 described above for subsequent detection. The first chamber 11 and the second chamber 12 of the present embodiment may be arranged in the first direction X in the drawing in order, but may also be arranged in other directions (for example, the second direction Y) along which the first sealing member 21 and the second sealing member 22 should move to seal the access port 111 and the communication passage 13 when arranged in the second direction Y.

The formation of the first chamber 11 and the second chamber 12 of the present embodiment may be achieved by one partition 14, and the partition 14 is provided with an opening, and the communication passage 13 is defined by the opening and a side wall at the opening. It is of course also possible to design the first chamber 11 and the second chamber 12 to have different radial dimensions in the second direction Y during processing, for example to design the radial dimension of the second chamber 12 to be smaller than the radial dimension of the first chamber 11, in order to distinguish between the first chamber 11 and the second chamber 12.

The seal assembly 20 of the present embodiment has two functions, one for sealing the access port 111 and the other for opening and closing the communication passage 13, and therefore it is necessary to provide the first seal 21 and the second seal 22, which may be a sealing plate structure, the first seal 21 for closing the access port 111 and the second seal 22 for closing and opening the communication passage 13, and the lower surfaces of the first seal 21 and the second seal 22 in the first direction X may be designed as flat surfaces to improve the sealing property thereof.

There are various ways of how the sealing assembly 20 seals the access opening 111 and how the communication channel 13 is opened and closed, for example, by manually or externally mechanical means to actuate the first and second sealing members 21 and 22, or by means of the first and second driving assemblies 23 and 25 of the device itself, as given below.

The air tightness detection assembly 30 of the present embodiment communicates with the first chamber 11, and when the air tightness detection of the first chamber 11 and the second chamber 12 is performed, the communication passage 13 is closed, and the air tightness detection assembly 30 detects only the air tightness of the first chamber 11. When the air tightness of the object to be measured such as the battery cell is detected, the communication passage 13 is opened, and the air tightness detection unit 30 detects the air tightness of the first chamber 11 and the second chamber 12. That is, in either detection method, the detection result is obtained by the air pressure in the first chamber 11. The airtight testing assembly 30 may be tested by pressure or vacuum test, some of which may be implemented as follows.

According to the above-mentioned air tightness detection device 100 of the present application, when the air tightness of the battery cell is detected, the battery cell can be put into the second chamber 12 from the taking-and-putting port 111 of the first chamber 11 through the first chamber 11 and the communication channel 13, then the taking-and-putting port 111 is sealed by the first sealing member 21, the communication channel 13 is closed by the second sealing member 22, so that the first chamber 11 and the second chamber 12 are disconnected, the air tightness detection assembly can be used for detecting the air tightness of the first chamber 11, after the air tightness detection of the first chamber 11 is qualified, the communication channel 13 is opened by the first sealing member 21, so that the first chamber 11 is communicated with the second chamber 12, and the air tightness of the battery cell can be detected by the air tightness detection assembly. Because the air tightness detection assembly is communicated with the first chamber 11, the taking and placing opening 111 of the battery cell of the whole detection carrier 10 is arranged in the first chamber 11, so that the position where the air tightness problem of the detection carrier 10 is easy to occur is mainly concentrated in the first chamber 11, the air tightness of the first chamber 11 is detected firstly, and then the air tightness of the battery cell is detected.

Referring again to fig. 1 and 2, according to some embodiments of the present application, the seal assembly 20 optionally further includes a first driving mechanism 23, where the first driving mechanism 23 is configured to move the first seal 21 to open or seal the access opening 111.

The first driving mechanism 23 may be mounted on the test carrier 10, or independent of the test carrier 10, the first driving mechanism 23 may be a linear reciprocating motion structure, or may be a conventional mechanical arm structure that is movable in multiple degrees of freedom, where the first driving mechanism 23 is configured to drive the first sealing member 21 to move at least along a first direction X in the drawing, so that the first sealing member 21 approaches or leaves the test carrier 10 located below in the drawing, and further the first sealing member 21 can be pressed against a part of the test carrier 10 around the pick-and-place opening 111 to seal the pick-and-place opening 111, or the part of the test carrier 10 around the pick-and-place opening 111 is released from being pressed, so as to release the seal of the pick-and-place opening 111. The first sealing element 21 is driven by the first driving mechanism 23 to open and seal the taking and placing opening 111, so that mechanization of the action of the first sealing element 21 is realized, and the operation efficiency of air tightness detection is improved.

According to some embodiments of the present application, optionally, the sealing assembly 20 further comprises a support assembly 24, the first driving mechanism 23 is mounted to the support assembly 24, and the support assembly 24 is mounted to the detection carrier 10.

The support assembly 24 may include any support structure such as a support frame, a support rod 241, a support table, etc., and the support assembly 24 may be mounted on the detection carrier 10 by a fixed connection, such as welding, an integral connection, plugging, etc., or by a detachable connection, such as a bolt connection, a snap connection, etc.

The support assembly 24 is used for mounting and supporting the first driving mechanism 23, so that the first driving mechanism 23, the support assembly 24 and the detection carrier 10 are connected into a whole, thereby not only improving the integrity of the device, but also helping to improve the stability of the first driving mechanism 23 in the driving process.

According to some embodiments of the present application, optionally, the first driving mechanism 23 includes a power member 231 and a telescopic member 232, wherein the power member 231 is mounted on the support assembly 24 and is in driving connection with the telescopic member 232, and the telescopic member 232 is connected with the first sealing member 21.

The power piece 231 can be the cylinder, electronic jar, pneumatic cylinder etc., and the extensible member 232 can be the piston rod of installing in above-mentioned cylinder body, can form straight reciprocating motion through power piece 231 and extensible member 232 for extensible member 232 can stretch out and draw back under the drive of power piece 231, and then drive first sealing member 21 and carry out the opening and close that gets put the mouth 111 of straight reciprocating motion, compare in other driving methods, the straight motion can reduce the time that first sealing member 21 required in the action process, can improve the stability of first sealing member 21 in the removal in-process moreover.

Of course, the structure of the first driving mechanism 23 in this embodiment is not limited to this, and may be a crank block driven by a motor, a rack and pinion sliding structure driven by a motor, or the like, which is not specifically described in this embodiment.

According to some embodiments of the present application, optionally, the support assembly 24 includes a support rod 241 and a support base 242, the support rod 241 is connected between the support base 242 and the detection carrier 10, the power member 231 is mounted on the support base 242, the telescopic member 232 is connected with the sliding member 233, and the sliding member 233 is slidably disposed on the support rod 241.

The first sealing member 21 may be connected to the telescopic member 232 or may be connected to the sliding member 233.

The first driving mechanism 23 of the present embodiment may be directly mounted on the support base 242, and the first driving mechanism 23 may perform telescopic motion on the support base 242. The support bars 241 may be vertically installed on the detection carrier 10, and the number of the support bars 241 may be one or a plurality of the support bars 241 in the drawing, for example, a plurality of the support bars 241 in the drawing are disposed around the pick-and-place port 111 of the present embodiment. The sliding piece 233 may be a structure such as a sliding block or a sliding frame, and the sliding piece 233 is provided with a hole or a groove slidably connected with the supporting rod 241, so that the sliding piece 233 can slide on the telescopic rod along the length direction (the first direction X in the figure) of the supporting rod 241, a certain guiding effect can be achieved on the linear telescopic action of the telescopic piece 232, the stability of the telescopic piece 232 in the linear telescopic process can be improved, and the first sealing piece 21 can more accurately seal the taking and placing opening 111.

Fig. 4 schematically illustrates a structural schematic diagram of the first sealing member 21, the second sealing member 22, the electromagnetic assembly 251, and the magnetic member 252 of the air tightness detection device 100 according to some embodiments of the present application. As shown in fig. 4, according to some embodiments of the present application, optionally, the second sealing member 22 is connected to the first sealing member 21, and the first driving mechanism 23 is used to move the first sealing member 21 and the second sealing member 22 synchronously.

The connection mode of the second sealing element 22 and the first sealing element 21 can be direct connection or connection through the second driving assembly 25 as follows, and when the first driving mechanism 23 drives the first sealing element 21 to move along the first direction X in the figure, the second sealing element 22 of the embodiment can be driven to act, and a power structure is not required to be configured for the action of the sealing communication channel 13 of the second sealing element 22 independently, so that the power source required by the device is reduced, the structure of the device is simplified, and the manufacturing cost of the device is reduced.

According to some embodiments of the present application, optionally, the sealing assembly 20 further includes a second driving assembly 25, the second driving assembly 25 is located between the first sealing member 21 and the second sealing member 22, the second sealing member 22 is connected to the first sealing member 21 through the second driving assembly 25, and the second driving assembly 25 is used for driving the second sealing member 22 to move so as to open or close the communication channel 13.

The reason why the second driving unit 25 is provided is that if the second sealing member 22 is moved in a direction away from the communication passage 13 by the first driving mechanism 23, the first sealing member 21 is simultaneously moved, and thus the sealing of the first sealing member 21 to the pick-and-place port 111 is easily released, and therefore, it is necessary to separately provide a power source for the operation of releasing the sealing of the communication passage 13 by the second sealing member 22.

The second driving component 25 may be any structure capable of driving the second sealing element 22 to perform linear motion, for example, a linear reciprocating motion structure such as an existing pneumatic cylinder, hydraulic cylinder or electric cylinder, or may be a mechanical arm structure that is movable in multiple degrees of freedom, where the second driving component 25 is used to drive the second sealing element 22 to move in a direction away from the communication channel 13, so that the second sealing element 22 releases the compression of part of the partition plates 14 around the communication channel 13 to release the sealing of the access opening 111. The second driving component 25 drives the second sealing element 22 to open the communication channel 13, so that the mechanization of the opening action of the second sealing element 22 is realized, and the operation efficiency of air tightness detection is improved.

According to some embodiments of the present application, the second driving assembly 25 optionally includes an electromagnetic assembly 251 and a magnetic member 252, the electromagnetic assembly 251 is mounted on the first sealing member 21, and the magnetic member 252 is slidably connected to the first sealing member 21 and connected to the second sealing member 22.

The electromagnetic assembly 251 and the magnetic member 252 may be electromagnets that are energized to have magnetism and that attract each other after being energized, and the circuit for energizing or magnetizing the electromagnetic assembly 251 and the magnetic member 252 is not shown in the drawings of the present application. The electromagnetic assembly 251 may be mounted on the first sealing member 21 by bonding, and the magnetic member 252 may be slidably connected to the first sealing member 21 by providing a slide way or a slide groove on the first sealing member 21, and the magnetic member 252 is connected to the slide way or the slide groove, so as to realize the sliding connection between the magnetic member 252 and the first sealing member 21.

When the first sealing element 21 moves to the sealing pick-and-place opening 111, the second sealing element 22 can be synchronously driven to move to a position close to the communication channel 13, at this time, the repulsion of the electromagnetic assembly 251 and the magnetic element 252 can drive the second sealing element 22 to seal the communication channel 13, and the attraction of the electromagnetic assembly 251 and the magnetic element 252 can drive the second sealing element 22 to open the communication channel 13, so that the opening and closing actions of the second sealing element 22 are realized by utilizing magnetic attraction, and the electromagnetic device has a simple structure and rapid action.

According to some embodiments of the present application, optionally, the second driving assembly 25 further includes an elastic member 253, and one end of the elastic member 253 is connected to the first sealing member 21, and the other end is connected to the second sealing member 22.

The elastic member 253 may be a spring or other elastic structure, and when the second sealing member 22 of the present embodiment is in sealing connection with the partition 14 around the communication channel 13, the elastic member 253 may be compressed, so that the elastic potential energy of the elastic member 253 may provide a pressing force for the second sealing member 22 to press the partition 14 around the communication channel 13, and the sealing performance of the second sealing member 22 may be improved.

According to some embodiments of the present application, optionally, the second driving assembly 25 further includes a second connecting member 254, one end of the second connecting member 254 is connected to the magnetic member 252, and the other end is connected to the second sealing member 22; the elastic member 253 is sleeved on the second connecting member 254.

The second connecting piece 254 may be a sliding block or a small sliding frame, and a slideway or a sliding groove may be provided on the first sealing piece 21, so that the second connecting piece 254 is connected with the slideway or the sliding groove, and sliding guiding of the second connecting piece 254 is realized. The connection manner of the second connecting member 254 and the second sealing member 22 may be any manner such as welding or bolting, as long as the two are fixed relatively and have a certain connection stability, and this embodiment will not be described in detail.

The second connecting piece 254 is connected with the magnetic piece 252, and the second connecting piece 254 is in sliding connection with the first sealing piece 21, so that when the magnetic piece 252 approaches to or departs from the electromagnetic assembly 251, the second connecting piece 254 can play a role of sliding guide, and the stability of the magnetic piece 252 in the moving process is improved; meanwhile, the elastic piece 253 is sleeved on the second connecting piece 254, so that compression and rebound guiding can be performed on the elastic piece 253, and deformation of the elastic piece 253 in other directions except axial deformation is reduced.

According to some embodiments of the present application, optionally, the first sealing member 21 is provided with a receiving groove 211, and the electromagnetic assembly 251 and the magnetic member 252 are mounted to the receiving groove 211.

The accommodating groove 211 may be a groove body with an open lower end as shown in fig. 4, the side wall of the accommodating groove 211 may be provided with the sliding groove or the sliding way, the magnetic member 252 is installed on one sliding groove or the sliding way, the second connecting member 254 is installed on the other sliding groove or the sliding way, and the accommodating groove 211 is used as an installation base of the electromagnetic assembly 251 and the magnetic member 252, so that the installation space of the second driving assembly 25 can be reduced, and the space utilization rate of the device is improved.

According to some embodiments of the present application, optionally, a cavity is formed in the detection carrier 10, a partition 14 is disposed around an inner wall of the cavity, a space between one side of the partition 14 and the pick-and-place opening 111 is a first chamber 11, a space between the other side of the partition 14 and a bottom wall of the cavity is a second chamber 12, and an opening is disposed on the partition 14, where the opening forms a communication channel 13.

The first chamber 11, the second chamber 12 and the communication channel 13 are formed by providing the partition plate in the cavity of the detection carrier 10, and the structure is simple and easy to realize.

According to some embodiments of the present application, optionally, a side of the second sealing member 22 facing the communication channel 13 is provided with a first sealing ring 221, and the first sealing ring 221 and the second sealing member 22 jointly seal the communication channel 13.

The first sealing ring 221 can be a rubber ring or other structures, and can be a sealing skirt or other structures, the radial size of the ring shape enclosed by the first sealing ring 221 is larger than the radial size of the communication channel 13, when the first driving mechanism 23 drives the second sealing member 22 to move to a sealing position, the first sealing ring 221 is tightly attached to the partition 14 around the communication channel 13, and the sealing ring is extruded between the second sealing member 22 and the partition 14, so that the communication channel 13 can be circumferentially enclosed and sealed, the leakage risk of the joint between the second sealing member 22 and the peripheral wall surface of the communication channel 13 can be reduced, and compared with the mode of only connecting and sealing the second sealing member 22 and the communication channel 13, the sealing effect can be better.

Referring again to fig. 1, in accordance with some embodiments of the present application, the test carrier 10 is optionally provided with a second seal 101, the second seal 101 being disposed about the access opening 111 and adapted to sealingly engage the first seal 21.

The second sealing ring 101 may be a rubber ring or a sealing skirt, and the second sealing ring 101 is similar to the first sealing ring 221 in structure and material, but the radial dimension of the second sealing ring 101 is larger, and the second sealing ring 101 is disposed around the pick-and-place opening 111 and is fixedly connected to the upper surface of the detection carrier 10.

When the first driving mechanism 23 drives the first sealing element 21 to move to the sealing position, the second sealing ring 101 is tightly attached to the part of the detection carrier 10 of the pick-and-place opening 111, and the first sealing element 21 is extruded between the first sealing element 21 and the detection carrier 10, so that the peripheral direction of the pick-and-place opening 111 can be surrounded and sealed, the leakage risk of the joint of the first sealing element 21 and the detection carrier 10 can be reduced, and compared with the mode of sealing the joint of the first sealing element 21 and the detection carrier 10, the sealing effect can be better.

As shown in fig. 1 and 5 in combination, according to some embodiments of the present application, the air tightness detection assembly 30 optionally includes an air charging and discharging mechanism 31 and an air pressure detection mechanism 32, and the air charging and discharging mechanism 31 and the air pressure detection mechanism 32 are respectively communicated with the first chamber 11.

The inflation/deflation mechanism 31 of the present embodiment may include an air pump 311 and a connection pipe 312, the air pump 311 is communicated with the first chamber 11 through the connection pipe 312, and an inflation/deflation port 3121 of the connection pipe 312 is located at a side wall of the first chamber 11. The air pressure detecting mechanism 32 of the present embodiment may include an air pressure sensor installed in the first chamber 11, the sensor being connected to a controller having a display function; alternatively, the air pressure detecting mechanism 32 may include an air pressure gauge as shown in the drawing, which communicates with the first chamber 11 of the present embodiment through a pipe, and which is capable of air pressure display.

When detecting, the air charging and discharging mechanism 31 can charge a certain amount of air into the first chamber 11, after a certain period of time, the air pressure detecting mechanism 32 is utilized to detect the air pressure change in the first chamber 11, when the air pressure does not change in a preset time period, the air tightness can be considered to be good, and when the air pressure fluctuates in a preset time period, the air tightness can be considered to be poor, and maintenance treatment is needed. After the detection is finished, the air is discharged by the air charging and discharging mechanism 31 to be subjected to subsequent detection, and the detection process is simple and effective.

In a second aspect, an embodiment of the present application provides a battery production system, where the battery includes a battery cell, and a liquid injection hole is provided on the battery cell, and the battery production system includes a liquid injection device, a sealing device, and the air tightness detection device 100 provided in any embodiment of the present application, where the liquid injection device is used to inject an electrolyte into the battery cell through the liquid injection hole; the sealing device is used for sealing the liquid injection hole, and the air tightness detection device is used for detecting the air tightness of the battery monomer.

Wherein the sealing device is a device for assembling a member for sealing the pouring orifice to the pouring orifice and causing the pouring orifice to be sealed. The electrolyte injection device is a device for delivering electrolyte to the electrolyte injection hole to inject the electrolyte into the case of the battery cell. The air tightness detection device can be used for detecting the air tightness of the battery cell before electrolyte is injected, and can also be used for detecting the air tightness of the battery cell after electrolyte is injected and sealed.

According to some embodiments of the present application, as shown in fig. 1 to 5, there is provided an air tightness detection device 100 including a detection carrier 10, a sealing member 20, and an air tightness detection member 30, the detection carrier 10 being provided with a first chamber 11, a second chamber 12, and a communication passage 13 communicating the first chamber 11 and the second chamber 12, the first chamber 11 having a pick-and-place port 111; the seal assembly 20 includes a first seal 21 for sealing the access port 111 and a second seal 22 for opening or closing the communication passage 13; the air tightness detection assembly 30 communicates with the first chamber 11. The sealing assembly 20 further comprises a first driving mechanism 23, and the first driving mechanism 23 is used for driving the first sealing member 21 to move so as to open or seal the access opening 111. The seal assembly 20 further includes a support assembly 24, the support assembly 24 being mounted to the test carrier 10, and the first drive mechanism 23 being mounted to the support assembly 24. The first driving mechanism 23 includes a power member 231 and a telescopic member 232, wherein the power member 231 is mounted on the support assembly 24 and is in transmission connection with the telescopic member 232, and the telescopic member 232 is slidably connected to the support assembly 24 and is connected with the first sealing member 21. The support assembly 24 comprises a support rod 241, the support rod 241 is mounted on the detection carrier 10, the telescopic piece 232 is connected with a sliding piece 233, and the sliding piece 233 is slidably arranged on the support rod 241. The sealing assembly 20 further includes a second driving assembly 25, where the second driving assembly 25 is mounted on the first sealing member 21 and is used to drive the second sealing member 22 to open or close the communication channel 13. The second driving assembly 25 includes an electromagnetic assembly 251 and a magnetic member 252, the electromagnetic assembly 251 is mounted to the first sealing member 21, and the magnetic member 252 is slidably coupled to the first sealing member 21 and coupled to the second sealing member 22. The second driving assembly 25 further includes an elastic member 253, one end of the elastic member 253 is connected to the first sealing member 21, and the other end is connected to the second sealing member 22. The second drive assembly 25 further includes a second link 254, the second link 254 being slidably coupled to the first seal 21; the second connecting piece 254 has one end connected to the magnetic piece 252 and the other end connected to the second sealing piece 22; the elastic member 253 is sleeved on the second connecting member 254. The first sealing member 21 is provided with a receiving groove 211, and the electromagnetic assembly 251 and the magnetic member 252 are mounted to the receiving groove 211. The side of the second sealing member 22 facing the communication passage 13 is provided with a first sealing ring 221, and the first sealing ring 221 and the second sealing member 22 seal the communication passage 13 together. The detection carrier 10 is provided with a second sealing ring 101, and the second sealing ring 101 is arranged around the pick-and-place opening 111 and is used for sealing fit with the first sealing member 21. The air tightness detecting assembly 30 includes an air charge and discharge mechanism 31 and an air pressure detecting mechanism 32, and the air charge and discharge mechanism 31 and the air pressure detecting mechanism 32 are respectively communicated with the first chamber 11.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (16)

1. An air tightness detection device, characterized by comprising:

the detection carrier is provided with a first chamber, a second chamber and a communication channel for communicating the first chamber with the second chamber, and the first chamber is provided with a taking and placing port;

The sealing assembly comprises a first sealing piece and a second sealing piece, the first sealing piece is used for sealing the taking and placing port, and the second sealing piece is used for opening or closing the communication channel; and

And the air tightness detection assembly is communicated with the first cavity.

2. The air tightness detection device according to claim 1, wherein the sealing assembly further comprises a first driving mechanism for driving the first sealing member to move to open or seal the access opening.

3. The air tightness testing device of claim 2 wherein the sealing assembly further comprises a support assembly, the first drive mechanism being mounted to the support assembly, the support assembly being mounted to the test carrier.

4. A gas tightness detection device according to claim 3 wherein said first drive mechanism comprises a power member and a telescoping member, said power member being mounted to said support assembly and in driving connection with said telescoping member, said telescoping member being connected with said first seal member.

5. The air tightness detection device according to claim 4, wherein the supporting assembly comprises a supporting rod and a supporting seat, the supporting rod is connected between the supporting seat and the detection carrier, the power piece is installed on the supporting seat, the telescopic piece is connected with a sliding piece, and the sliding piece is arranged on the supporting rod in a sliding mode.

6. The air tightness detection device according to claim 2, wherein the second sealing member is connected to the first sealing member, and the first driving mechanism is configured to move the second sealing member and the first sealing member synchronously.

7. The air tightness detection device according to claim 6, wherein the sealing assembly further comprises a second driving assembly, the second driving assembly is located between the first sealing member and the second sealing member, the second sealing member is connected with the first sealing member through the second driving assembly, and the second driving assembly is used for driving the second sealing member to move so as to open or close the communication channel.

8. The air tightness testing device of claim 7 wherein said second drive assembly comprises an electromagnetic assembly mounted to said first seal member and a magnetic member slidably coupled to said first seal member and coupled to said second seal member.

9. The air tightness testing device of claim 8 wherein said second drive assembly further comprises an elastic member having one end connected to said first seal member and another end connected to said second seal member.

10. The air tightness detection device according to claim 9, wherein the second driving assembly further comprises a second connecting member, one end of the second connecting member is connected with the magnetic member, the other end is connected with the second sealing member, and the elastic member is sleeved on the second connecting member.

11. The air tightness detection device according to claim 8, wherein the first sealing member is provided with a receiving groove, and the electromagnetic assembly and the magnetic member are both disposed in the receiving groove.

12. The air tightness detection device according to any of claims 1-11, wherein a cavity is formed in the detection carrier, a partition board is arranged around the inner wall of the cavity, a space between one side of the partition board and the pick-and-place opening is the first cavity, a space between the other side of the partition board and the bottom wall of the cavity is the second cavity, and an opening is formed in the partition board, and the opening forms the communication channel.

13. The air-tightness detection device according to any of claims 1 to 11, wherein a side of the second sealing member facing the communication passage is provided with a first sealing ring, and the first sealing ring and the second sealing member seal the communication passage together.

14. The air tightness testing device according to any of the claims 1-11, wherein said testing carrier is provided with a second sealing ring, which is arranged around said access opening and adapted to be in sealing engagement with said first sealing member.

15. The air tightness detection device according to any of claims 1-11, wherein the air tightness detection assembly comprises an air charging and discharging mechanism and an air pressure detection mechanism, which are respectively in communication with the first chamber.

16. A battery production system, the battery includes the battery monomer, be provided with annotate the liquid hole on the battery monomer, its characterized in that, battery production system includes:

The liquid injection device is used for injecting electrolyte into the battery cell through the liquid injection hole;

the sealing device is used for sealing the liquid injection hole;

The air tightness detection device according to any of claims 1-15, for detecting air tightness of the battery cell.