Nailing piece, nailing device and battery production system

Abstract

The utility model provides a nailing piece, a nailing device and a battery production system, and relates to the technical field related to batteries. The nailing piece comprises a connecting part and a working head part, the connecting part is used for being connected with the power piece, and the working head part is detachably connected to the connecting part. The nailing piece comprises the detachable connecting part and the working head part, the connecting part and the working head part can be separated, and when the working head part is polluted by the electrolyte at the liquid injection hole and needs to be cleaned or replaced, the working head part can be detached from the connecting part and cleaned. Compared with the mode that the whole nailing piece is disassembled and cleaned, only the working head is disassembled, the occupied disassembling operation space is small, operation is more convenient, and the nailing piece replacing and cleaning efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a nailing piece, a nailing device and a battery production system. Background Art

[0002] During the battery cell assembly process, the sealing nail can be installed in the injection hole through a nailing device to ensure the stability and safety of the battery.

[0003] However, the electrolyte remaining at the battery cell injection hole will contaminate the nailing parts of the nailing device, making it difficult to disassemble and clean the nailing parts, which has a great impact on the work efficiency. Utility Model Content

[0004] The present application provides a nailing piece, a nailing device and a battery production system to alleviate the problem that the nailing pieces of the existing nailing device are difficult to disassemble, which affects the working efficiency.

[0005] In a first aspect, the present application provides a nailing component for assembling a sealing nail onto a liquid injection hole of a battery cell, comprising a connecting portion and a working head, wherein the connecting portion is used to connect a power component; the working head is detachably connected to the connecting portion for taking and placing the sealing nail.

[0006] According to the nailing piece of the present application, in the process of assembling the sealing nail on the injection hole of the battery cell, since the working head is used to take and place the sealing nail, it is usually mainly the working head that is easily contacted and contaminated by the electrolyte. The nailing piece includes a detachable connecting portion and a working head, and the connecting portion and the working head can be separated. When the working head is contaminated by the electrolyte at the injection hole and needs to be cleaned or replaced, the working head can be removed from the connecting portion and cleaned. Compared to disassembling and cleaning the entire nailing piece, the present application can only disassemble the working head, and the disassembly operation space required is smaller, and the operation is more convenient, which improves the efficiency of disassembly and replacement of the nailing piece. Moreover, since the working head is smaller than the overall nailing piece, it is easier to clean the working head than the overall nailing piece, thereby facilitating the cleaning operation of the nailing piece and improving the cleaning efficiency of the nailing piece.

[0007] In some embodiments, the working head is connected to the connecting portion by at least one of threaded connection, plug connection and snap connection. The threaded connection, plug connection and snap connection are used to connect the working head and the connecting portion, which has a simple structure and is easy to disassemble and assemble.

[0008] In some embodiments, the connection portion is provided with a connection section, the working head is provided with a connection hole, and the connection section is threadedly connected to the connection hole. When the connection portion and the working head are connected, the connection hole of the working head is docked with the connection section, and then the working head is directly screwed to complete the connection between the two, so that the connection operation of the connection portion and the working head is convenient. When the nailing piece needs to be cleaned, the working head is screwed to release its connection with the connection portion, which is convenient for cleaning the working head.

[0009] In some embodiments, the connection portion further comprises a supporting section, the supporting section is connected to one end of the connection portion away from the working head, the radial dimension of the supporting section is larger than the radial dimension of the connection portion, and the end face of the supporting section close to one end of the connection portion is against the working head. The end face of the supporting section can be against the side wall of the connection hole, and when the working head is screwed to the connection portion, the end face can limit the installation position of the working head on the connection portion, play a role in limiting and locking the working head, and the end face can produce a certain sealing match with the annular surface of the hole wall of the connection hole, which can improve the sealing performance of the connection portion and the working head after connection.

[0010] In some embodiments, the connecting portion is provided with a first air channel for connecting to the power part, the working head is provided with a second air channel and a suction nozzle, the first air channel, the second air channel and the suction nozzle are connected in sequence, and the suction nozzle is used to adsorb the sealing nail. When picking up the sealing nail, the power part generates a negative pressure suction force on the sealing nail through the first air channel, the second air channel and the suction nozzle, so that the working head can pick up the sealing nail. When placing the sealing nail, the power part is closed or the power part charges the first air channel, the second air channel and the suction nozzle with a positive pressure repulsion force, so that the working head releases the picking up of the sealing nail, which is easy to operate and not easy to cause damage to the sealing nail.

[0011] In some embodiments, the nailing member further comprises a sealing portion, which is sealed at the connection between the connecting portion and the working head. The possibility of air leakage at the connection between the first airway and the second airway can be reduced by sealing the sealing portion with the connecting portion and the working head.

[0012] In some embodiments, the connecting portion is provided with a connecting section, the working head is provided with a connecting hole, the connecting section is threadedly connected to the connecting hole, and the sealing portion is sleeved on the connecting section and sealed with the hole wall of the connecting hole. The sealing portion is arranged between the connecting section and the connecting hole, and the connecting section and the connecting hole can squeeze the sealing portion, so that the sealing portion has good sealing performance with the connecting section and the hole wall of the connecting hole.

[0013] In some embodiments, the connection section is provided with a mounting groove, the sealing part is installed in the mounting groove, and part of the sealing part protrudes from the mounting groove, and the part of the sealing part protruding from the mounting groove is sealed and connected with the hole wall of the connection hole. By installing the sealing part in the mounting groove, it is easy to position and assemble the sealing part, and the side wall of the mounting groove can provide a certain limit fixing effect for the sealing part, reducing the possibility of the sealing part moving on the connection section, thereby improving the sealing effect of the sealing part.

[0014] In some embodiments, the sealing portion includes a sealing ring, and the sealing ring is sleeved in the mounting groove. The sealing ring has a simple structure, is easy to install, and is usually elastic, and can provide good sealing between the connecting section and the working head.

[0015] In some embodiments, the outer circumference of the connection part is provided with two first planes disposed opposite to each other and parallel to each other; and / or, the outer circumference of the working head is provided with two second planes disposed opposite to each other and parallel to each other. The two first planes can be matched with the two arm surfaces of the clamping arm of the external clamping device in a one-to-one correspondence, thereby facilitating the external clamping arm to clamp the connection part to install the connection part. Similarly, the two second planes can be matched with the two arm surfaces of the clamping arm of the external clamping device in a one-to-one correspondence, thereby facilitating the external clamping arm to clamp the connection part to install the working head to the connection part, thereby improving the installation efficiency of the connection part installed on the power part, and improving the installation efficiency of the working head installed on the connection part.

[0016] In a second aspect, an embodiment of the present application provides a nailing device, including a power member and a nailing member proposed in the present application or the embodiment of the present application, wherein the power member is connected to the connecting portion and is used to drive the working head to take and place the sealing nail.

[0017] In a third aspect, an embodiment of the present application provides a battery production system, wherein the battery includes a battery cell, and the battery cell is provided with an injection hole. The battery production system includes an injection device and a nailing device proposed in the present application or any embodiment of the present application, the injection device is used to inject electrolyte into the battery cell through the injection hole; the nailing device is used to place a sealing nail in the injection hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use 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 ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0019] Figure 1The schematic diagram of the structure of the nailing member provided in some embodiments of the present application is shown;

[0020] Figure 2 Schematically showing a side view of a nailing member provided in some embodiments of the present application;

[0021] Figure 3 The schematic diagram shows the structure of the nailing member provided in some embodiments of the present application in a disassembled state;

[0022] Figure 4 Schematically showing a cross-sectional view of a connecting portion of a nailing member provided in some embodiments of the present application;

[0023] Figure 5 A cross-sectional view of a working head of a nail driving member provided in some embodiments of the present application is schematically shown.

[0024] The reference numerals of the specific embodiments are as follows:

[0025] 100. Nailing parts;

[0026] 10. Connecting portion; 11. Connecting section; 111. External thread; 112. Mounting groove; 12. Abutting section; 121. End surface; 13. First air passage; 14. First plane;

[0027] 20. working head; 21. connecting hole; 211. internal thread; 212. annular groove; 22. second air passage; 23. suction nozzle; 24. second plane;

[0028] 30. Sealing part; 31. Sealing ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0031] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The term "and / or" in this application is only 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 at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0035] The term "plurality" used in the present application refers to two or more (including two).

[0036] Batteries have the advantages of high energy density, rechargeable, safe and environmentally friendly, so they are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields. The battery includes one or more battery cells. In some technologies, during the processing of the battery cell, the electrolyte needs to be injected from the injection hole of the battery cell. After the electrolyte injection is completed, the injection hole needs to be sealed. Taking the battery cell of the power battery as an example, during the production process of the battery cell, the sealing nail can be installed on the injection hole of the battery cell by the nailing part of the nailing device to seal the injection port. Among them, the sealing nail includes an inner sealing nail and an outer sealing nail. The inner sealing nail can be an elastic rubber nail with insulation and sealing properties such as a fluororubber nail, and the outer sealing nail can be a rigid nail made of metal such as aluminum. After the elastic inner sealing nail is installed, the rigid outer sealing nail can be welded to the shell of the battery cell, and the outer sealing nail can be pressed and sealed to the sealing nail, so that the inner sealing nail can produce a certain extrusion deformation in the injection hole and has better sealing performance.

[0037] However, when the nailing part of the nailing device drives the sealing nail into the injection hole, the residual electrolyte at the injection hole of the battery cell will adhere to the nailing part. After the electrolyte on the nailing part crystallizes, it will affect the accuracy and work efficiency of the subsequent picking up and placing of the sealing nail by the nailing part. For example, when the nailing device is an integrated vacuum nail suction device that uses negative pressure to absorb the sealing nail, the crystallized electrolyte will block the suction nozzle of the nailing part, resulting in the inability to perform the nail suction operation, causing the nailing device to frequently alarm.

[0038] When the above situation occurs in the nailing device, the only way is to adjust the position of the nailing parts in the nailing device so that the nailing parts can be taken out, and then remove the nailing parts for cleaning. After cleaning, the nailing parts can be used again. However, this method has many disadvantages. One is that the nailing parts are located inside the shell of the nailing device, and the internal space of the shell of the nailing device is small, which makes it difficult to disassemble and assemble the nailing parts; the other is that the nailing parts are large as a whole. If the nailing parts need to be removed, the nailing parts that have been positioned in the working position need to be adjusted to a position with a larger device space to facilitate the removal of the nailing parts, resulting in the positioning of the nailing parts. The positioning and adjustment time is long, which affects the production efficiency; another is that the nailing parts have a certain structural length and the cleaning time is long.

[0039] In view of this, the present application provides a nailing component, which is designed to be a split and detachable working head and connecting part. The connecting part and the working head can be separated. When the working head is contaminated by the electrolyte at the injection hole and needs to be cleaned or replaced, the working head can be removed from the connecting part and cleaned. Compared with disassembling and cleaning the entire nailing component, the present application can only disassemble the working head, which requires less space for disassembly operation and is more convenient to operate, thereby improving the efficiency of replacing and cleaning the nailing component.

[0040] 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 mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0041] The battery cell mentioned in this embodiment includes a shell, an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode ear is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes 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 includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0042] The shell may include a shell body and an end cover. The end cover refers to a component that covers the opening of the shell body to isolate the internal environment of the battery cell from the external environment. The shell body is a component used to cooperate with the end cover to form the internal environment of the battery cell. The shell body and the end cover may be independent components. An opening may be provided on the shell body, and the internal environment of the battery cell is formed by covering the opening with the end cover at the opening. Without limitation, the end cover and the shell body may be integrated. Specifically, the end cover and the shell body may form a common connection surface before other components are inserted into the shell. When the interior of the shell body needs to be encapsulated, the end cover is covered with the shell body. The shell is usually provided with an injection hole for injecting electrolyte. The specific injection hole may be provided on the end cover. When preparing the battery cell, the electrolyte may be injected into the shell through the injection hole, and the injection hole may be sealed by a sealing nail after the electrolyte is injected.

[0043] Furthermore, the above-mentioned battery can be used in electrical devices, which can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes airplanes, rockets, space shuttles, and spacecrafts, etc.; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0044] Combine the following Figure 1-Figure 5 The structure and function of the nail driving member according to the embodiment of the present application are described.

[0045] Figure 1 The schematic diagram of the structure of the nailing member provided in some embodiments of the present application is shown schematically. Figure 2 The side view of the nailing member provided in some embodiments of the present application is schematically shown. Figure 3 The schematic diagram shows the structure of the nailing parts in the disassembled state provided in some embodiments of the present application.

[0046] Combined with Figure 1 , Attachment Figure 2 and attached Figure 3 As shown in the figure, this embodiment provides a nailing component 100 for assembling a sealing nail on the injection hole of a battery cell, comprising a connecting portion 10 and a working head 20. The connecting portion 10 is used to connect the power component; the working head 20 is detachably connected to the connecting portion 10 for taking and placing the sealing nail.

[0047] In the above structure, the connecting portion 10 and the working head 20 are two parts of the original integrated nailing piece 100. In the nailing piece 100 with a certain structural length, the connecting portion 10 can be understood as a section of the nailing piece 100 used to connect the power member, and the working head 20 can be understood as an end directly in contact with the sealing nail. The material of the connecting portion 10 and the working head 20 can be a high-temperature resistant and insulating polymer material, such as polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE), etc.

[0048] The structural form of the connecting part 10 and the working head 20, and the connection form of the connecting part 10 and the power part depend on the structural form of the power part. For example, when the power part is an air source, the connecting part 10 and the working head 20 can be approximately tubular, and the connection between the connecting part 10 and the power part can be connected through the internal airway of the connecting part 10. When the power part is a structure such as a mechanical arm, the connecting part 10 can be a rod or block with power lines and control lines inside, the working head 20 can be a clamp, and the connection between the connecting part 10 and the power part can be any detachable mechanical connection method.

[0049] Regarding the detachable connection between the connecting portion 10 and the working head 20, the "detachable" can be understood as the two can be disassembled after docking, and can be docked again after disassembly, and the working performance of the connecting portion 10 and the working head 20 will not be affected after the second docking.

[0050] The sealing nail can be the aforementioned rubber nail with a certain deformation ability. The rubber nail can be made of insulating materials such as fluorine rubber, or can be made of elastic non-insulating materials, such as common conductive rubber.

[0051] According to the nailing piece 100 described above in the embodiment of the present application, the nailing piece 100 is designed to include a detachable separate connection part 10 and a working head 20. In the process of assembling the sealing nail on the injection hole of the battery cell by the nailing piece 100, since the working head 20 is used to take and place the sealing nail, it is usually mainly the working head 20 that is easily contacted and contaminated by the electrolyte. Since the nailing piece 100 includes a detachable connection part 10 and a working head 20, the connection part 10 and the working head 20 can be separated. When the working head 20 is contaminated by the electrolyte at the injection hole and needs to be cleaned or replaced, the working head 20 can be removed from the connection part 10 and cleaned. Compared with disassembling and cleaning the entire nailing piece 100, the present application can only disassemble the working head 20, and the disassembly operation space required is smaller, and the operation is more convenient, which improves the efficiency of replacing and cleaning the nailing piece 100. In addition, compared to the method of taking out the entire nailing piece 100 for cleaning, in this embodiment, only the working head 20 can be taken out for cleaning, and the connecting part 10 is still in the installation position of the working state. In this way, after the working head 20 is cleaned or a new working head is selected to be connected to the connecting part 10, the working head 20 is limited by the installation position of the connecting part 10. After the working head 20 is installed, it can be in the positioning position required for the working state, thereby eliminating the time for re-positioning and adjusting the nailing piece, which is beneficial to improving the assembly efficiency of the nailing piece, thereby improving the battery production efficiency, and is beneficial to the consistency of the accuracy of the nailing operation, thereby improving the nailing sealing effect of the battery cell.

[0052] According to some embodiments of the present application, optionally, the working head 20 is connected to the connecting portion 10 by at least one of a threaded connection, a plug-in connection, and a snap-on connection.

[0053] When the detachable connection between the working head 20 and the connecting part 10 is a threaded connection, it can be as follows: Figure 3 As shown in the figure, an internal thread 211 is provided in the connection hole 21 of the working head 20, and an external thread 111 connected to the internal thread 211 is provided at one end of the connecting portion 10. Of course, it is also possible to provide a hole in the connecting portion 10 (this embodiment is not shown in the figure), the hole is provided with an internal thread 211, and an external thread 111 connected to the internal thread 211 is provided at one end of the working head 20.

[0054] When the detachable connection between the working head 20 and the connecting part 10 is plug-in (this embodiment is not shown in the figure), a jack may be provided on the working head 20, and a plug matching the jack may be provided on one end of the connecting part 10. Of course, a jack may also be provided on the connecting part 10, and a plug may be provided on one end of the working head 20.

[0055] When the detachable connection between the working head 20 and the connecting part 10 is a buckle (this embodiment is not shown in the figure), the buckle can be provided on the outer circumference of the working head 20, and the slot adapted to the buckle can be provided on the outer circumference of the connecting part 10. Of course, the buckle can also be provided on the connecting part 10, and the slot can be provided at one end of the working head 20.

[0056] Threaded connection, plug-in connection and snap-on connection are common detachable connection methods, which are not only easy to process and simple in structure, but also convenient for assembly and disassembly of the connecting part 10 and the working head 20 .

[0057] Combined with the attachment again Figure 3 As shown in , according to some embodiments of the present application, optionally, the connecting portion 10 is provided with a connecting section 11 , the working head 20 is provided with a connecting hole 21 , and the connecting section 11 is threadedly connected in the connecting hole 21 .

[0058] The connecting section 11 can be a cylindrical structure as shown in the figure, and an external thread 111 is machined and formed on the connecting section 11. Correspondingly, an internal thread 211 is machined and formed on the inner wall surface of the connecting hole 21. The internal thread 211 and the external thread 111 are threadedly connected. The internal thread 211 and the external thread 111 can be common spiral threads, or can be tapered threads, pipe threads, tapered pipe threads, etc., as long as they can meet the detachable connection between the connecting section 11 and the connecting hole 21. This embodiment does not list them one by one.

[0059] This embodiment uses a threaded connection to achieve a detachable connection between the connection part 10 and the working head 20. Compared with the plug-in and snap-on connection modes, the threaded connection has better connection stability because: after multiple insertions and removals, the plug-in position is prone to wear, which leads to connection failure after the working head 20 and the connection part 10 are connected. Similarly, the snap-on connection is also prone to elastic failure or damage of the snap-on after multiple deformations. However, since the connection of the threaded connection has a certain structural length, even if part of it is worn out, it does not affect the threaded connection of the rest of the part.

[0060] When connecting the connecting part 10 and the working head 20, the connecting hole 21 of the working head 20 is docked with the connecting section 11, and then the working head 20 is directly screwed to complete the connection between the two. When the nailing piece 100 needs to be cleaned, the working head 20 is screwed to release its connection with the connecting part 10, so as to facilitate the cleaning of the working head 20.

[0061] Figure 4 A cross-sectional view of a connecting portion 10 of a nailing member 100 provided in some embodiments of the present application is schematically shown.

[0062] Combined with Figure 3 and attached Figure 4 As shown in , according to some embodiments of the present application, optionally, the connecting portion 10 also includes a supporting segment 12, which is connected to an end of the connecting segment 11 away from the working head 20, and a radial dimension of the supporting segment 12 is greater than a radial dimension of the connecting segment 11, and an end face 121 of the supporting segment 12 at one end close to the connecting segment 11 is abutted against the working head 20.

[0063] The supporting section 12 can be integrally formed with the main body of the connecting part 10 during the processing of the connecting part 10. The axial length of the supporting section 12 can be greater than or equal to or less than or equal to the above-mentioned connecting section 11. The radial dimension of the supporting section 12 is greater than the radial dimension of the connecting section 11 and the radial dimension of the rest of the connecting part 10.

[0064] The connecting section 11 forms an annular end face 121 on the side facing the working head 20. The end face 121 of the abutting section 12 can abut against the hole wall of the connecting hole 21, thereby limiting and locking the working head 20, and can produce a certain sealing fit with the hole wall of the connecting hole 21. In addition, since the radial dimension of the abutting section 12 is greater than the radial dimension of the rest of the connecting portion 10, the structural strength of the connecting portion 10 can also be correspondingly enhanced.

[0065] Figure 5 A cross-sectional view of a working head 20 of a nail driving member 100 provided in some embodiments of the present application is schematically shown.

[0066] Combined with Figure 4 and attached Figure 5 As shown in , according to some embodiments of the present application, optionally, the connecting portion 10 is provided with a first air channel 13, the working head 20 is provided with a second air channel 22 and a suction nozzle 23, the first air channel 13, the second air channel 22 and the suction nozzle 23 are connected in sequence, and the suction nozzle is used to adsorb the sealing nail.

[0067] When the connecting portion 10 is provided with a first air channel 13 and the working head 20 is provided with a second air channel 22, the power member described in this embodiment is an air source, which can generate vacuum suction or negative pressure suction, and the power member can be an air pump or a structure with a function similar to that of an air pump, and the power member can be connected to one end of the first air channel 13 of this embodiment through a connecting pipeline (not shown in the figure). The first air channel 13 is a through hole opened in the connecting portion 10 along the length direction of the connecting portion 10, and similarly, the second air channel 22 is a through hole opened in the working head 20 along the length direction of the working head 20.

[0068] In order to facilitate the working head 20 to absorb the sealing nail, a suction nozzle 23 can be provided at the end of the working head 20 away from the connecting part 10. The radial dimension of the suction nozzle 23 is smaller than the radial dimension of the connecting hole 21 provided on the working head 20, so that the suction nozzle 23 can have a greater adsorption force on the sealing nail per unit area.

[0069] After the power part, the connecting part 10 and the working head 20 are connected, the connecting pipeline of the power part is connected to one end of the first air channel 13, the other end of the first air channel 13 is connected to one end of the second air channel 22, and the other end of the second air channel 22 is used to adsorb the sealing nail.

[0070] When picking up the sealing nail, the power part generates negative pressure suction through the first air channel 13 and the second air channel 22, so that the working head 20 can pick up the sealing nail. When placing the sealing nail, the power part is closed or generates positive pressure repulsion through the first air channel 13 and the second air channel 22, so that the working head 20 releases the sealing nail. The whole picking and placing process is fast, and the picking and placing of the sealing nail is achieved through the first air channel 13 and the second air channel 22. The structure is simple and the operation is convenient.

[0071] Combined with the attachment again Figure 4 As shown in , according to some embodiments of the present application, optionally, the nailing component 100 further includes a sealing portion 30 , and the sealing portion 30 is sealed at the connection between the connecting portion 10 and the working head 20 .

[0072] The sealing portion 30 may be Figure 4As shown in the figure, it is arranged on the connecting part 10, and can also be arranged on the working head 20. Of course, the sealing part 30 can also be arranged on both the connecting part 10 and the working head 20. After the connecting part 10 and the working head 20 are connected, the sealing part 30 can seal the connection between the first air channel 13 and the second air channel 22, thereby reducing the possibility of air leakage at the connection between the first air channel 13 and the second air channel 22, and improving the reliability of the nailing piece 100.

[0073] According to some embodiments of the present application, optionally, the connecting portion 10 is provided with a connecting section 11, the working head 20 is provided with a connecting hole 21, the connecting section 11 is threadedly connected in the connecting hole 21, and the sealing portion 30 is sleeved on the connecting section 11 and sealedly connected to the hole wall of the connecting hole 21.

[0074] In this embodiment, the sealing portion 30 is sleeved on the connecting section 11. Compared with the method of setting the sealing portion 30 in the connecting hole 21, it is easier to install the sealing portion 30 on the exposed connecting section 11. After the sealing portion 30 is sleeved on the connecting section 11, the connecting section 11 can be bonded or hot-melt welded to fix the position of the sealing portion 30 on the connecting section 11.

[0075] The sealing part 30 is arranged between the connecting section 11 and the connecting hole 21, and the connecting section 11 and the connecting hole 21 can squeeze the sealing part 30, so that the sealing part 30 has good sealing performance with the hole wall of the connecting section 11 and the connecting hole 21. The sealing part 30 can have an elastic material, such as a sealing ring, etc., so that the sealing part 30 is arranged between the connecting section 11 and the connecting hole 21, so that the sealing part 30 can produce elastic deformation, thereby generating elastic potential energy that is conducive to sealing the gap between the connecting section 11 and the hole wall of the connecting hole 21, and further improving the sealing performance at the connecting section 11 and the connecting hole 21.

[0076] According to some embodiments of the present application, optionally, the connecting section 11 is provided with a mounting groove 112, the sealing portion 30 is installed in the mounting groove 112, and partially protrudes from the mounting groove 112, and the portion of the sealing portion 30 protruding from the mounting groove 112 is sealed and connected to the hole wall of the connecting hole 21.

[0077] A mounting groove 112 may be provided between the connecting section 11 and the abutting section 12, and the sealing portion 30 may be installed in the mounting groove 112, and a portion of the sealing portion 30 protrudes from the mounting groove 112, and the portion of the sealing portion 30 protruding from the mounting groove 112 is used to form a sealing fit with the hole wall of the connecting hole 21. The mounting groove 112 not only facilitates the installation of the sealing portion 30, but also the side wall of the mounting groove 112 can play a certain limiting role on the sealing portion 30, thereby preventing the sealing portion 30 from moving and affecting the sealing performance.

[0078] Combined with the attachment again Figure 4As shown in , according to some embodiments of the present application, optionally, the sealing portion 30 includes a sealing ring 31 , and the sealing ring 31 is sleeved in the mounting groove 112 .

[0079] The sealing ring 31 is an elastic ring-shaped device used to prevent gas or liquid from leaking from the connection point. The sealing ring 31 is installed between the connection section 11 of the connection part 10 and the connection hole 21 of the working head 20 to fill the gap between the contact surface of the connection section 11 and the connection hole 21, thereby creating an effective seal. The sealing ring 31 can be made of elastic materials such as rubber. The sealing ring 31 has the characteristics of simple structure and easy installation, and can provide good sealing between the connection section 11 and the working head 20.

[0080] When the sealing portion 30 of the present embodiment includes a sealing ring 31 , an annular groove 212 may be formed on the inner wall surface of the connecting hole 21 , and the annular groove 212 is used to accommodate the sealing ring 31 after being squeezed and deformed.

[0081] Combined with the attachment again Figure 3 , Attachment Figure 4 and attached Figure 5 As shown in , according to some embodiments of the present application, optionally, two first planes 14 arranged opposite to each other are provided on the outer circumference of the connecting portion 10; and / or, two second planes 24 arranged opposite to each other and parallel to each other are provided on the outer circumference of the working head 20.

[0082] The first plane 14 and the second plane 24 can be formed by cutting and other processes during processing. When the connection part 10 and the working head 20 need to be installed and placed, the two first planes 14 can be matched with the two arm surfaces of the clamping arm of the external clamping device in a one-to-one correspondence, thereby facilitating the external clamping arm to clamp the connection part 10 to install the connection part 10. Similarly, the two second planes 24 can be matched with the two arm surfaces of the clamping arm of the external clamping device in a one-to-one correspondence, thereby facilitating the external clamping arm to clamp the connection part 10 to install the working head 20.

[0083] It should be noted that the first plane 14 and the second plane 24 in the present embodiment refer to relative planes, that is, compared with the original arc-shaped outer peripheral surfaces of the connecting portion 10 and the working head 20, the first plane 14 and the second plane 24 have a flatness that is more conducive to cooperation with the clamping arm, rather than the first plane 14 and the second plane 24 being flat and smooth planes at any point. For example, some bumps or wrinkles may be provided on the first plane 14 and the second plane 24 to increase the friction with the clamping arm.

[0084] Some embodiments of the present application further provide a nailing device, including a power piece and a nailing piece 100 as proposed in the present application or any embodiment of the present application, wherein the power piece is connected to the connecting portion 10 and is used to drive the working head 20 to take and place the sealing nail.

[0085] Some embodiments of the present application also provide a battery production system, the battery including a battery cell, the battery cell being provided with an injection hole, the battery production system including an injection device and a nailing device of the above technical solution, the injection device being used to inject electrolyte into the battery cell through the injection hole; the nailing device being used to place a sealing nail in the injection hole.

[0086] The function of the liquid injection device is to inject electrolyte into the battery cell to complete a part of the battery assembly. The basic structure of the liquid injection device may include a liquid supply device and a liquid injection head. The liquid supply device may be a liquid pump, and the liquid supply device is used to transport the electrolyte to the liquid injection head, and the liquid injection head is used to accurately inject the electrolyte into the battery cell. The liquid injection hole of the battery cell can be sealed by the liquid injection device and the nailing device, reducing the possibility of liquid leakage in the liquid injection hole and improving the reliability of the battery cell.

[0087] According to some embodiments of the present application, Figures 1 to 5As shown in , this embodiment provides a nailing piece 100 for assembling a sealing nail on the injection hole of a battery cell. The nailing piece 100 includes a connecting portion 10 and a working head 20. The connecting portion 10 is used to connect the power member; the working head 20 is detachably connected to the connecting portion 10 for taking and placing the sealing nail. The working head 20 is connected to the connecting portion 10 by at least one of threaded connection, plug-in connection and snap-on connection. The threaded connection, plug-in connection and snap-on connection are used to connect the working head 20 and the connecting portion 10, which is not only simple in structure but also convenient for disassembly and assembly. The connecting portion 10 is provided with a connecting section 11, and the working head 20 is provided with a connecting hole 21. The connecting portion 10 also includes a supporting section 12, which is connected to one end of the connecting section 11 away from the working head 20, and the radial dimension of the supporting section 12 is greater than the radial dimension of the connecting section 11. The end face 121 of the supporting section 12 close to the connecting section 11 is against the working head 20. The connecting portion 10 is provided with a first air passage 13 for connecting the power part, and the working head 20 is provided with a second air passage 22 and a suction nozzle 23. The first air passage 13, the second air passage 22 and the suction nozzle 23 are connected in sequence, and the suction nozzle 23 is used to absorb the sealing nail. The nailing member 100 also includes a sealing portion 30, which is sealed at the connection between the connecting portion 10 and the working head 20. The connecting portion 10 is provided with a connecting section 11, and the working head 20 is provided with a connecting hole 21. The connecting section 11 is threadedly connected in the connecting hole 21, and the sealing portion 30 is sleeved on the connecting section 11 and is sealed and connected with the hole wall of the connecting hole 21. The connecting section 11 is provided with a mounting groove 112, and the sealing portion 30 is installed in the mounting groove 112. A portion of the sealing portion 30 protrudes from the mounting groove 112, and a portion of the sealing portion 30 protruding from the mounting groove 112 is sealed and connected with the hole wall of the connecting hole 21. The sealing portion 30 includes a sealing ring 31, and the sealing ring 31 is sleeved on the mounting groove 112. Two first planes 14 disposed opposite to each other and parallel to each other are provided on the outer circumference of the connecting portion 10 ; two second planes 24 disposed opposite to each other and parallel to each other are provided on the outer circumference of the working head 20 .

[0088] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A nailing piece, used for assembling a sealing nail on a liquid injection hole of a battery cell, characterized in that: include: A connecting part, used for connecting a power part; The working head is detachably connected to the connecting part and is used for taking and placing the sealing nail.

2. The nailing member according to claim 1, characterized in that: The working head is connected to the connecting portion by at least one of a threaded connection, a plug-in connection and a snap-on connection.

3. The nailing member according to claim 2, characterized in that: The connecting portion is provided with a connecting section, the working head is provided with a connecting hole, and the connecting section is threadedly connected in the connecting hole.

4. The nailing member according to claim 3, characterized in that: The connecting portion further comprises a supporting section, which is connected to one end of the connecting section away from the working head, the radial dimension of the supporting section is larger than the radial dimension of the connecting section, and the end face of the supporting section close to one end of the connecting section is against the working head.

5. The nailing tool according to claim 1 or 2, characterized in that: The connecting portion is provided with a first air channel for connecting to the power part, and the working head is provided with a second air channel and a suction nozzle. The first air channel, the second air channel and the suction nozzle are connected in sequence, and the suction nozzle is used to absorb the sealing nail.

6. The nailing member according to claim 5, characterized in that: The nail driving member further comprises a sealing portion, which is sealed at a connection between the connecting portion and the working head.

7. The nailing member according to claim 6, characterized in that: The connecting portion is provided with a connecting section, the working head is provided with a connecting hole, the connecting section is threadedly connected in the connecting hole, and the sealing portion is sleeved on the connecting section and is sealed and connected with the hole wall of the connecting hole.

8. The nailing member according to claim 7, characterized in that: The connecting section is provided with a mounting groove, the sealing portion is installed in the mounting groove and partially protrudes from the mounting groove, and the portion of the sealing portion protruding from the mounting groove is sealingly connected to the hole wall of the connecting hole.

9. The nailing member according to claim 8, characterized in that: The sealing portion comprises a sealing ring, and the sealing ring is sleeved in the mounting groove.

10. The nailing tool according to any one of claims 1 to 4, characterized in that: The outer circumferential surface of the connecting portion is provided with two first planes which are arranged opposite to each other and parallel to each other; And / or, two second planes which are arranged opposite to each other and parallel to each other are provided on the outer peripheral surface of the working head.

11. A nailing device, characterized in that: include: The nailing piece according to any one of claims 1 to 10; A power piece is connected to the connecting portion and is used to drive the working head to take and place the sealing nail.

12. A battery production system, wherein the battery comprises a battery cell, and the battery cell is provided with a liquid injection hole, characterized in that: The battery production system comprises: A liquid injection device, used for injecting electrolyte into the battery cell through the liquid injection hole; The nailing device according to claim 11 is used to assemble the sealing nail to the injection hole.

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