Liquid injection equipment and battery manufacturing equipment

Abstract

The present application discloses a liquid injection device and a battery manufacturing device. The liquid injection device includes a base, a liquid injection bracket and a positioning assembly. The base is used to support a battery cell, and the liquid injection bracket includes a liquid injection device and a telescopic assembly, and the telescopic assembly can drive the liquid injection device to move toward the battery cell to inject liquid into the battery cell. The positioning assembly includes a recessed portion provided on the liquid injection bracket and a convex portion provided on the base, and the recessed portion matches the convex portion. Among them, the number of positioning assemblies is at least three, namely a first assembly, a second assembly and a third assembly, and the arrangement direction of the first assembly and the second assembly is arranged to intersect with the arrangement direction of the second assembly and the third assembly. In the process of the liquid injection device moving toward the liquid injection hole, the convex portion can extend into the recessed portion to fix the position of the telescopic assembly relative to the base, thereby improving the efficiency of positioning, thereby improving the liquid injection efficiency and positioning accuracy.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a liquid injection device and a battery manufacturing device. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and energy storage systems, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, sodium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] During the production of battery cells, electrolyte needs to be injected into the shell of the battery cells. Usually, the electrolyte injection process includes the steps of positioning the injection hole, moving the injection nozzle to the injection hole, and injecting the electrolyte. In the above process, the positioning accuracy of the injection hole is not high, resulting in a decrease in the electrolyte injection efficiency. Therefore, it is necessary to improve the above method to improve the positioning accuracy and injection efficiency. Utility Model Content

[0004] In view of the above problems, the present application provides a liquid injection device and a battery manufacturing device, which can improve the liquid injection efficiency and the liquid injection positioning accuracy of the battery cells, and improve the production efficiency of the battery.

[0005] In a first aspect, the present application provides a liquid injection device, including a base, a liquid injection bracket, and a positioning assembly. The base is used to support a battery cell, and the liquid injection bracket includes a liquid injection device and a telescopic assembly, and the telescopic assembly can drive the liquid injection device to move toward the battery cell to inject liquid into the battery cell. The positioning assembly includes a recessed portion provided on the liquid injection bracket and a convex portion provided on the base, and the recessed portion matches the convex portion. Among them, the number of positioning assemblies is at least three, namely a first assembly, a second assembly, and a third assembly, and the arrangement direction of the first assembly and the second assembly intersects with the arrangement direction of the second assembly and the third assembly.

[0006] In the technical solution of the embodiment of the present application, the battery cell is fixed by setting a base, and an injection device is set on the injection bracket. The injection device can be connected to the electrolyte supply source to inject the electrolyte into the battery cell. The telescopic component can move toward the battery cell to improve the efficiency of injection of the injection device. In the process of the injection device moving toward the injection hole, the convex part can extend into the concave part to fix the position of the telescopic component relative to the base, thereby improving the efficiency of positioning. Among them, the connecting line of the first component and the second component intersects with the connecting line of the second component and the third component, and positioning can be performed from two intersecting directions, which improves the accuracy of positioning, thereby improving the positioning accuracy of injection and improving the efficiency of injection.

[0007] In some embodiments, the positioning assembly includes a sleeve and a guide pin. One end of the sleeve is connected to the telescopic assembly, and the other end surface is concave to form a recess. The guide pin is arranged on the side of the base facing the telescopic assembly. In the above structure, by providing the sleeve and the guide pin, the guide pin can make a micro-adjustment of the position of the bracket relative to the base during the process of entering the sleeve, further improving the accuracy of positioning, improving the efficiency of alignment between the injection device and the battery cell injection hole, improving the battery cell injection efficiency, and thus improving the production efficiency of the battery.

[0008] In some embodiments, the cross-sectional area of ​​the end of the guide pin gradually decreases along the direction from the base toward the telescopic assembly. In the above structure, the end of the guide pin forms a pointed tip, which can facilitate the guide pin to enter the sleeve, and after entering the sleeve, it can guide the movement of the telescopic assembly, thereby improving the accuracy of positioning.

[0009] In some embodiments, the telescopic assembly includes a column, a mounting plate, and a connecting plate. There are multiple columns and two mounting plates. The mounting plate is connected to one end of the column, the two mounting plates are arranged opposite to each other, and the sleeve is arranged on the mounting plate. The two ends of the connecting plate are respectively connected to the two mounting plates, and multiple injection devices are arranged at intervals on the connecting plate. In the above structure, the column, the mounting plate, and the connecting plate are interconnected to form a stable frame structure, which improves the structural stability of the telescopic assembly. Multiple injection devices are arranged on the mounting plate, which can inject liquid into multiple battery cells at the same time, thereby improving the injection efficiency.

[0010] In some embodiments, the liquid injection bracket further includes a guide assembly, which includes a positioning bar and a guide block. The two ends of the positioning bar are respectively connected to the mounting plate, and there are two positioning bars, which are arranged opposite to each other, and the space between the two positioning bars is used to clamp the battery cell. The guide block is arranged on the positioning bar, and there are multiple guide blocks, and two adjacent guide blocks are used to clamp a battery cell from both sides respectively. In the above structure, the battery cell is positioned twice by setting the guide block, so as to further improve the positioning accuracy and improve the efficiency of liquid injection of the battery cell.

[0011] In some embodiments, the cross-sectional area of ​​the guide block gradually decreases along the direction from the mounting plate to the base. In the above structure, the guide block has a smaller end, which can facilitate the guide block to move quickly to both sides of the battery cell, thereby improving efficiency. In addition, the position of the battery cell can be guided to improve the accuracy of positioning.

[0012] In some embodiments, the guide assembly further includes a limit block, which is connected between two adjacent guide blocks and is disposed at one end of the guide block away from the base. In the above structure, by providing the limit block, the movement of the telescopic assembly relative to the battery cell is limited, thereby reducing the risk of interference between the injection device and the battery cell and improving the accuracy of positioning.

[0013] In some embodiments, along the direction from the mounting plate to the base, the length of the sleeve is greater than the length of the guide block. In the above structure, the sleeve and the positioning pin first locate the position of the telescopic assembly, and then the positioning bar and the battery cell are located. The two positionings improve the positioning accuracy.

[0014] In some embodiments, the telescopic assembly further comprises a driving motor disposed between the column and the mounting plate, the driving motor being used to drive the mounting plate to move toward the base. By providing the driving motor, the accuracy and efficiency of the positioning of the liquid injection device are improved.

[0015] In some embodiments, the telescopic assembly further includes a mounting bolt, a plurality of fixing holes are provided at intervals on the mounting plate, at least one positioning bar is provided with a mounting hole, and the mounting bolt passes through the mounting hole and extends into any one of the fixing holes to connect the positioning bar and the mounting plate. By providing a plurality of mounting holes, it is possible to adjust the distance between the two positioning bars, adapt to the positioning of battery cells of different widths, and expand the applicability of the injection device.

[0016] In a second aspect, the present application provides a battery manufacturing device, which includes the liquid injection device in the above embodiment.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the exploded structure of a battery according to an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a battery cell according to an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of a liquid injection device according to an embodiment of the present application;

[0023] Figure 5 This is a schematic structural diagram of a liquid injection bracket according to an embodiment of the present application;

[0024] Figure 6 This is a schematic structural diagram of a liquid injection device according to another embodiment of the present application;

[0025] Figure 7 This is a schematic structural diagram of a guide assembly according to another embodiment of the present application.

[0026] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0027] 1. Vehicle; 2. Battery; 10. Electrode assembly; 20. Shell; 21. Liquid injection hole; 30. End cover; 40. Shell; 3. Controller; 4. Motor; 5. Box; 51. First part; 52. Second part; 53. Accommodation space; 6. Liquid injection equipment; 601. Base; 602. Liquid injection bracket; 603. Positioning assembly; 604. Liquid injection device; 605. Telescopic assembly; 606. Concave portion; 607. Protrusion; 608. First assembly; 609. Second assembly; 610. Third assembly; 611. Sleeve; 612. Guide pin; 613. Column; 614. Mounting plate; 615. Connecting plate; 616. Guide assembly; 617. Positioning strip; 618. Guide block; 619. Limit block; 620. Pulley; 7. Battery cell. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0037] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0038] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 2 is provided inside the vehicle 1, and the battery 2 may be provided at the bottom, the head or the tail of the vehicle 1. The battery 2 may be used to power the vehicle 1, for example, the battery 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4, and the controller 3 is used to control the battery 2 to power the motor 4, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0039] In some embodiments of the present application, the battery 2 can be used not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0040] In some embodiments, the battery 2 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0041] Please refer to Figure 2 , Figure 2 The exploded diagram of the battery provided in some embodiments of the present application. The battery 2 includes a box body 5 and a battery cell 7, and the battery cell 7 is accommodated in the box body 5. The box body 5 is used to provide a storage space for the battery cell 7, and the box body 5 can adopt a variety of structures.

[0042] In some optional embodiments, the box body 5 includes a first part 51 and a second part 52, the first part 51 and the second part 52 cover each other, and the first part 51 and the second part 52 jointly define a storage space 53 for accommodating the battery cell 7. The second part 52 can be a hollow structure with one end open, and the first part 51 can be a plate-like structure, and the first part 51 covers the open side of the second part 52, so that the first part 51 and the second part 52 jointly define the storage space 53; the first part 51 and the second part 52 can also be hollow structures with one side open, and the open side of the first part 51 covers the open side of the second part 52. Of course, the box body 5 formed by the first part 51 and the second part 52 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0043] In some embodiments, the box 5 can be used as part of the chassis structure of the vehicle 1. For example, part of the box 5 can become at least a part of the floor of the vehicle 1, or part of the box 5 can become at least a part of the cross beam and longitudinal beam of the vehicle 1.

[0044] In the battery 2, there can be multiple battery cells 7, and the multiple battery cells 7 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 7 are both connected in series and in parallel. The multiple battery cells 7 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 7 is accommodated in the box 5. Of course, the battery 2 can also be a battery module formed by connecting multiple battery cells 7 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 5. The battery 2 can also include other structures, for example, the battery 2 can also include a converging component for realizing the electrical connection between the multiple battery cells 7.

[0045] Each battery cell 7 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 7 may be cylindrical, flat, rectangular or in other shapes.

[0046] Please refer to Figure 3 , Figure 3 The schematic diagram of the structure of a battery cell 7 provided in one embodiment of the present application. The battery cell 7 refers to the smallest unit constituting the battery 2. Figure 3 The battery cell 7 includes a housing 40, an electrode assembly 10 and other functional components.

[0047] The housing 40 is a component for accommodating the electrode assembly 10. The housing 40 has a housing cavity, and the electrode assembly can be arranged in the housing cavity. The housing 40 can be made of a variety of materials, such as copper, iron, aluminum, steel, and aluminum alloy. The housing 40 can be in a variety of shapes, such as a cylinder, a cuboid, etc. The housing 40 in the exemplary figure is a cylinder.

[0048] The housing 40 may include an end cap 30 and a shell 20. The end cap 30 refers to a component that covers the opening of the shell 20 to isolate the internal environment of the battery cell 7 from the external environment. Without limitation, the shape of the end cap 30 may be adapted to the shape of the shell 20 to match the shell 20. Optionally, the end cap 30 may be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 30 is not easily deformed when squeezed and collided, so that the battery cell 7 can have a higher structural strength and the safety performance can also be improved.

[0049] In some embodiments, the end cap 30 may also be provided with an injection hole 21, which is used to inject electrolyte into the battery cell 7. The material of the end cap 30 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application. In some embodiments, an insulating component may also be provided on the inner side of the end cap 30 to reduce the risk of short circuit. Exemplarily, the insulating component may be plastic, rubber, etc.

[0050] The housing 20 is a component used to cooperate with the end cap 30 to form the internal environment of the battery cell 7. The formed internal environment can be used to accommodate the electrode assembly 10, the electrolyte and other components. The housing 20 and the end cap 30 can be independent components, and an opening can be set on the housing 20, and the internal environment of the battery cell 7 is formed by covering the opening with the end cap 30.

[0051] In some optional embodiments, the end cap 30 and the shell 20 can also be integrated. Specifically, the end cap 30 and the shell 20 can form a common connection surface before other components are put into the shell. When the interior of the shell 20 needs to be encapsulated, the end cap 30 is covered with the shell 20. The shell 20 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 20 can be determined according to the specific shape and size of the electrode assembly 10. The material of the shell 20 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0052] The electrode assembly 10 is a component in the battery cell 7 where electrochemical reactions occur. One or more electrode assemblies 10 may be included in the housing 20. The electrode assembly 10 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 7, active ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through.

[0053] In some embodiments, the separator is a separator. The present application has no particular restrictions on the type of separator, and any known porous separator with good chemical stability and mechanical stability can be selected. As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.

[0054] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0055] In some embodiments, the battery cell 7 further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0056] During the battery production process, the battery cells need to be injected with electrolyte. The electrolyte injection process usually includes: fixing the battery cells on a base, using a robot to move the injection device to the injection hole of the battery cells, connecting the injection device to the injection hole and starting the injection.

[0057] However, the above-mentioned injection method is less efficient. In order to improve the efficiency of injection, an embodiment of the present application provides an injection device that can improve the injection efficiency of the battery cell and improve the accuracy of positioning between the injection device and the injection hole. In the injection device of the embodiment of the present application, the battery cell is fixed by setting a base, and an injection device is set on the injection bracket. The injection device can be connected to the electrolyte supply source to inject the electrolyte into the battery cell. The telescopic component can move toward the battery cell to improve the efficiency of injection of the injection device. In the process of the injection device moving toward the injection hole, the convex portion can extend into the concave portion to fix the position of the telescopic component relative to the base, thereby improving the efficiency of positioning. Among them, the connecting line of the first component and the second component intersects with the connecting line of the second component and the third component, and can be positioned from two intersecting directions, thereby improving the accuracy of positioning, thereby improving the positioning accuracy of injection and improving the efficiency of injection.

[0058] The following is a detailed description of the liquid injection device of the embodiment of the present application in conjunction with the accompanying drawings. Figures 4 to 7 , Figure 4 This is a schematic diagram of the structure of a liquid injection device according to an embodiment of the present application. Figure 5 This is a schematic diagram of the structure of a liquid injection bracket according to an embodiment of the present application. Figure 6 This is a schematic diagram of the structure of a liquid injection device according to another embodiment of the present application. Figure 7 This is a schematic structural diagram of a guide assembly according to another embodiment of the present application.

[0059] As shown in the figure, the embodiment of the present application provides a liquid injection device 6, including a base 601, a liquid injection bracket 602 and a positioning component 603. The base 601 is used to support the battery cell 7, and the liquid injection bracket 602 includes a liquid injection device 604 and a telescopic component 605. The telescopic component 605 and the extension component can drive the liquid injection device 604 to move toward the battery cell 7 to inject liquid into the battery cell 7. The positioning component 603 includes a recessed portion 606 provided on the liquid injection bracket 602 and a convex portion 607 provided on the base 601, and the recessed portion 606 matches the convex portion 607. Among them, the number of the positioning components 603 is at least three, namely, a first component 608, a second component 609 and a third component 610, and the arrangement direction of the first component 608 and the second component 609 is arranged to intersect with the arrangement direction of the second component 609 and the third component 610.

[0060] Optionally, the base 601 can be a base or frame for supporting and fixing the battery 2 manufacturing equipment, and the base 601 can provide stability to ensure the accuracy and reliability of the equipment during the manufacturing process. The injection device 604 can be an injection nozzle for injecting electrolyte into the injection hole 21 of the battery cell 7. Exemplarily, the injection nozzle includes a small tube, one end of which is usually a pointed tip that can be inserted into the injection hole 21, and the other end is an outlet for guiding the electrolyte into the container. The injection nozzle is usually used in conjunction with an injection system. The injection system may also include other components, such as pumps, valves, pipes, and liquid storage tanks. These components work together to transport the liquid from the liquid storage tank to the injection nozzle, and then inject it into the housing 20 of the battery cell 7.

[0061] Among them, the first component 608, the second component 609 and the third component 610 are connected to each other to form a triangle, and the three vertices define a plane, which fixes the position of the telescopic component 605 in space and is not prone to tilting or shifting, thereby improving the accuracy of the positioning of the telescopic component 605 relative to the base 601.

[0062] In the technical solution of the embodiment of the present application, the battery cell 7 is fixed by setting a base 601, and a liquid injection device 604 is set on the liquid injection bracket 602. The liquid injection device 604 can be connected to the electrolyte supply source to inject the electrolyte into the battery cell 7. The telescopic component 605 can move toward the battery cell 7 to improve the efficiency of liquid injection by the liquid injection device 604. In the process of the liquid injection device 604 moving toward the liquid injection hole 21, the convex portion 607 can extend into the concave portion 606 to fix the position of the telescopic component 605 relative to the base 601, thereby improving the efficiency of positioning. Among them, the connecting line of the first component 608 and the second component 609 intersects with the connecting line of the second component 609 and the third component 610, and positioning can be performed from two intersecting directions, thereby improving the accuracy of positioning, thereby improving the positioning accuracy of liquid injection, and improving the efficiency of liquid injection.

[0063] like Figure 6 As shown, in some embodiments of the present application, the positioning assembly 603 includes a sleeve 611 and a guide pin 612. One end of the sleeve 611 is connected to the telescopic assembly 605, and the other end of the sleeve 611 is concave to form a recess 606. The guide pin 612 is provided on one side of the base 601 facing the telescopic assembly 605.

[0064] In the above structure, one end of the sleeve 611 is connected to the telescopic assembly 605, providing a stable support and guide for the telescopic movement of the injection bracket 602. The other end surface of the sleeve 611 is concave to form a recess 606, which provides appropriate space and guidance for the subsequent entry of the guide pin 612. The guide pin 612 is arranged on the side of the base 601 facing the telescopic assembly 605, and its main function is to provide guidance for the sleeve 611 to ensure that it moves on the correct path. When the guide pin 612 enters the recess 606 of the sleeve 611, it can fine-tune the position of the telescopic bracket, further ensuring that the injection device 604 is accurately aligned with the injection hole 21 of the battery cell 7. Through the cooperation of the guide pin 612 and the sleeve 611, the system can position the telescopic bracket, improving the alignment accuracy between the injection device 604 and the injection hole 21 of the battery cell 7. This high-precision positioning ensures that the electrolyte can be accurately and evenly injected into the battery cell 7, improving the injection efficiency. Thanks to this precise positioning and alignment design, the overall efficiency of battery 2 production has been significantly improved. It not only reduces errors and waste during the injection process, but also speeds up the production process.

[0065] In some embodiments of the present application, the cross-sectional area of ​​the end of the guide pin 612 gradually decreases along the direction from the base 601 toward the telescopic assembly 605 .

[0066] In the above structure, the end of the guide pin 612 is designed to be gradually reduced, and the end of the guide pin 612 toward the sleeve 611 forms a tip, which makes it easier for the guide pin 612 to enter the sleeve 611. The design of the tip reduces the friction and resistance when entering the sleeve 611, making the operation smoother. In addition, after the guide pin 612 enters the sleeve 611, its tip can be used as a precise guide point to guide the movement of the telescopic assembly 605. This design ensures that the telescopic bracket always stays on the correct path during the movement, reduces the risk of deviation, and thus improves the accuracy of positioning.

[0067] Furthermore, due to the tip design of the guide pin 612, the friction and error generated when it enters and exits the sleeve 611 are minimized. This helps to reduce the cumulative error in the system and ensures that high-precision positioning can be achieved in each operation. This special design of the guide pin 612 simplifies the operating steps, making it easier and faster for workers to complete the positioning process. This not only improves production efficiency, but also reduces the difficulty of operation, providing convenience for continuous operation in a large-scale production environment. Since the tip design of the guide pin 612 reduces the friction between it and the sleeve 611, it also means that possible wear and damage is reduced. This helps to extend the service life of the guide pin 612 and the sleeve 611, reduce the frequency of maintenance and replacement, and further improve production efficiency.

[0068] like Figure 5As shown, in some embodiments of the present application, the telescopic assembly 605 includes a column 613, a mounting plate 614, and a connecting plate 615. There are multiple columns 613, and there are two mounting plates 614. The mounting plate 614 is connected to one end of the column 613, the two mounting plates 614 are arranged opposite to each other, and the sleeve 611 is arranged on the mounting plate 614. Both ends of the connecting plate 615 are respectively connected to the two mounting plates 614, and multiple injection devices 604 are arranged on the connecting plate 615 at intervals.

[0069] In the above structure, there are multiple columns 613, which provide the main support and stability for the telescopic assembly 605. The design of multiple columns 613 increases the rigidity and anti-twisting ability of the system, ensuring that the injection bracket 602 can remain stable under various operating conditions. The mounting plate 614 is connected to one end of the column 613, and two mounting plates 614 are arranged opposite to each other. The sleeve 611 is arranged on the mounting plate 614 as a key part for cooperating with the guide pin 612, which improves the precise movement and alignment speed of the injection bracket 602. The two ends of the connecting plate 615 are respectively connected to the two mounting plates 614. This connection method further strengthens the connection between the various components to form a stable frame structure. Among them, multiple injection devices 604 are arranged at intervals on the connecting plate 615, which can perform injection operations for multiple battery cells 7 at the same time. This design improves the efficiency of injection and meets the demand for high production rate in the manufacturing process of battery cells 7.

[0070] In some optional embodiments, the number of the uprights 613 is four, and the number of the positioning components 603 is also four. The above structure can improve the accuracy of positioning the telescopic component 605.

[0071] like Figure 5 as well as Figure 7 As shown, in some embodiments of the present application, the liquid injection bracket 602 further includes a guide assembly 616, and the guide assembly 616 includes a positioning bar 617 and a guide block 618. The two ends of the positioning bar 617 are respectively connected to the mounting plate 614, and there are two positioning bars 617, which are arranged opposite to each other, and the space between the two positioning bars 617 is used to clamp the battery cell 7. The guide block 618 is arranged on the positioning bar 617, and there are multiple guide blocks 618, and two adjacent guide blocks 618 are used to clamp a battery cell 7 from both sides.

[0072] In the above structure, the two ends of the positioning bar 617 are respectively connected to the mounting plate 614, and the number of the positioning bars 617 is two, and the two positioning bars 617 are arranged opposite to each other. Such a design enables the positioning bar 617 to be firmly connected to the mounting plate 614, and at the same time provides a stable frame for clamping the battery cell 7. The space between the two positioning bars 617 is specially designed for clamping the battery cell 7. This space ensures the stability of the battery cell 7 during the injection process and reduces the possibility of movement or misalignment. The guide blocks 618 are arranged on the positioning bar 617, and the number of the guide blocks 618 is multiple. The main function of these guide blocks 618 is to clamp a battery cell 7 from both sides. Through the clamping of the guide blocks 618, the battery cell 7 is secondary positioned, so the design of the guide blocks 618 not only provides additional support and stability, but also secondary positions the battery cell 7 by clamping. This double positioning accurately aligns the injection device 604 with the injection hole 21 of the battery cell 7, thereby improving the efficiency and accuracy of the injection. Due to the accuracy and stability of the guide assembly 616, the injection efficiency of the battery cell 7 is improved. This not only reduces operation time and manual intervention, but also improves overall production efficiency.

[0073] In some optional embodiments, guide blocks 618 with different width intervals can be set on the positioning bar 617 to accommodate battery cells 7 of different widths. By replacing different positioning bars 617, the positioning of battery cells 7 of different widths can be adapted, thereby improving the efficiency of positioning the battery cells 7 and thus improving the production efficiency of the battery cells 7.

[0074] In some embodiments of the present application, the cross-sectional area of ​​the guide block 618 gradually decreases along the direction from the mounting plate 614 toward the base 601 .

[0075] In the above structure, the cross-sectional area of ​​the guide block 618 gradually decreases, that is, its end is relatively narrow. This design enables the guide block 618 to slide over or bypass obstacles around the battery cell 7 more smoothly and move quickly to both sides of the battery cell 7. This simplifies the operation steps and improves the overall work efficiency. In addition, the smaller end of the guide block 618 contacts the battery cell 7, providing precise guidance for the position of the battery cell 7. This guiding effect improves the stability of the battery cell 7 during the injection process, reduces the possibility of misalignment or movement, and thus improves the accuracy of positioning. Further, due to the guiding effect of the guide block 618, it helps to reduce the accumulation of errors during operation. By accurately guiding the battery cell 7, the positioning error is minimized, ensuring the accuracy and consistency of the injection process. The fast movement and precise guiding characteristics of the guide block 618 jointly improve production efficiency. By simplifying the operation process and reducing positioning errors, the injection efficiency and positioning accuracy are further improved. Finally, the tip portion of the guide block 618 can reduce the lightness of the guide block 618 and improve the flexibility and convenience of the telescopic assembly 605 moving up and down.

[0076] In some embodiments of the present application, the guide assembly 616 further includes a limit block 619 , which is connected between two adjacent guide blocks 618 and is disposed at one end of the guide block 618 away from the base 601 .

[0077] In the above structure, the limit block 619 is connected between two adjacent guide blocks 618, which improves the structural stability between the limit block 619, the guide block 618 and the mounting plate 614. Through the restriction of the limit block 619, the battery cell 7 is more firmly fixed in the positioning bar 617, reducing the risk of interference between the injection device 604 and the battery cell 7. The setting of the limit block 619 further improves the accuracy of positioning. It works in conjunction with the guide block 618 to ensure the stability of the battery cell 7 during the injection process and reduce the possibility of misalignment or movement. In summary, the design of the limit block 619 helps to limit the movement of the telescopic assembly 605, reduces the risk of interference between the injection device 604 and the battery cell 7, and improves the efficiency and accuracy of the injection operation.

[0078] like Figure 6 As shown, in some embodiments of the present application, along the direction from the mounting plate 614 toward the base 601 , the length of the sleeve 611 is greater than the length of the guide block 618 .

[0079] In the above structure, the length of the sleeve 611 is relatively long, and the sleeve 611 first contacts the guide pin 612. This length difference ensures that the sleeve 611 plays a full role in the initial positioning process. The position of the telescopic component 605 is initially positioned by the positioning component 603 to ensure the approximate position of the injection bracket 602 relative to the base 601, laying the foundation for subsequent precise positioning. The length of the guide block 618 is relatively short, so the guide component 616 performs secondary guidance after the positioning component 603 completes the preliminary positioning, accurately guides the position between the injection device 604 and the battery cell 7, and ensures the stability of the battery cell 7 during the injection process. Therefore, the above technical solution achieves the accuracy of the two positionings through the preliminary positioning of the sleeve 611 and the positioning pin, and the secondary positioning of the guide block 618 and the battery cell 7. This double positioning method is carried out sequentially during the movement of the telescopic bracket toward the base 601. Only one descending action is required to achieve accurate double positioning of the entire injection device 6, ensuring the smooth progress of the injection process, thereby improving the efficiency and accuracy of the battery cell 7 injection.

[0080] In some embodiments of the present application, the telescopic assembly 605 further includes a driving motor disposed between the column 613 and the mounting plate 614 , and the driving motor is used to drive the mounting plate 614 to move toward the base 601 .

[0081] The drive motor is disposed between the column 613 and the mounting plate 614, and can drive the mounting plate 614 to move toward the base 601. This design utilizes the precise control and power output of the motor to ensure that the mounting plate 614 can be quickly and accurately moved to the desired position. By providing the drive motor, the positioning of the telescopic assembly 605 is more precise. The high-precision control capability of the motor ensures the accuracy and stability of the mounting plate 614 during movement, thereby improving the positioning accuracy of the injection device 604. In addition, the efficient operation of the drive motor enables the mounting plate 614 to quickly complete the positioning operation, reducing the time required for positioning and improving production efficiency.

[0082] In some embodiments of the present application, the telescopic assembly 605 also includes a mounting bolt, a plurality of fixing holes are spaced apart on the mounting plate 614, at least one positioning bar 617 is provided with a mounting hole, and the mounting bolt passes through the mounting hole and extends into any one of the fixing holes to connect the positioning bar 617 and the mounting plate 614.

[0083] In some optional embodiments, the surface of the mounting plate 614 facing the positioning bar 617 is provided with an inwardly concave slide groove, which extends along the length direction of the mounting plate 614. The positioning bar 617 is provided with a corresponding protrusion, and the protrusion cooperates with the slide groove so that the positioning bar 617 can slide relative to the mounting plate 614, thereby adjusting the distance between the two positioning bars 617. The above structure improves the efficiency of moving the positioning bar 617 to the required position, and improves the efficiency of the liquid injection device 6 in adapting to battery cells 7 of different widths.

[0084] In the above technical solution, the mounting bolts are used to connect the positioning bar 617 and the mounting plate 614. By passing the mounting bolts through the mounting holes on the positioning bar 617 and extending them into the fixing holes on the mounting plate 614, the positioning bar 617 can be quickly and firmly installed. In addition, by setting a plurality of mounting holes, the user can easily adjust the distance between the two positioning bars 617. The flexibility enables the positioning bar 617 to adapt to battery cells 7 of different widths, thereby expanding the scope of application of the injection device 6. In addition, the distances between the plurality of mounting holes can be set according to the battery cells 7 of different widths, thereby simplifying the installation and adjustment process, enabling the installation and adjustment of the positioning bar 617 to be completed quickly and accurately, thereby improving production efficiency and reducing operation time and labor costs.

[0085] In some optional embodiments, a pulley 620 is provided at the bottom of the base 601, and the pulley 620 can drive the base 601 to move. By providing the pulley 620, the base 601 can drive the battery cell 7 to move, so as to adjust the relative distance between the battery cell 7 and the injection device 604. In addition, the pulley 620 can also drive the base 601 to move out from under the injection bracket 602, and move the battery cell 7 to perform the next manufacturing process, thereby improving the manufacturing efficiency.

[0086] The embodiment of the present application also provides a battery manufacturing device, which includes the injection device 6 in the above embodiment. In the injection device 6, the battery cell 7 is fixed by setting a base 601, and the injection device 604 is set on the injection bracket 602. The injection device 604 can be connected to the electrolyte supply source to inject the electrolyte into the battery cell 7. The telescopic component 605 can move toward the battery cell 7 to improve the efficiency of the injection device 604. In the process of the injection device 604 moving toward the injection hole 21, the convex part 607 can extend into the concave part 606 to fix the position of the telescopic component 605 relative to the base 601, thereby improving the efficiency of positioning. Among them, the connecting line of the first component 608 and the second component 609 intersects with the connecting line of the second component 609 and the third component 610, and can be positioned from two intersecting directions, thereby improving the positioning accuracy, thereby improving the positioning accuracy of the injection, and improving the efficiency of the injection.

[0087] 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 them; 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A liquid injection device (6), characterized in that: include: A base (601) for supporting a battery cell (7); A liquid injection bracket (602) comprises a liquid injection device (604) and a telescopic component (605), wherein the telescopic component (605) can drive the liquid injection device (604) to move toward the battery cell (7) to inject liquid into the battery cell (7); The positioning assembly (603) comprises a recessed portion (606) provided on the injection support (602) and a convex portion (607) provided on the base (601), wherein the recessed portion (606) matches the convex portion (607). Wherein, the number of the positioning components (603) is at least three, namely the first component (608), the second component (609) and the third component (610), and the arrangement direction of the first component (608) and the second component (609) intersects with the arrangement direction of the second component (609) and the third component (610).

2. The liquid injection device (6) according to claim 1, characterized in that: The positioning component (603) comprises: A sleeve (611), one end of which is connected to the telescopic assembly (605), and the other end of which is concave to form the concave portion (606); A guide pin (612) is disposed on a side of the base (601) facing the telescopic assembly (605).

3. The liquid injection device (6) according to claim 2, characterized in that: Along the direction from the base (601) toward the telescopic assembly (605), the cross-sectional area of ​​the end of the guide pin (612) gradually decreases.

4. The liquid injection device (6) according to claim 2, characterized in that: The telescopic assembly (605) comprises: Columns (613), the number is multiple; There are two mounting plates (614), the mounting plates (614) are connected to one end of the column (613), the two mounting plates (614) are arranged opposite to each other, and the sleeve (611) is arranged on the mounting plates (614); The connecting plate (615) has two ends respectively connected to the two mounting plates (614), and the plurality of liquid injection devices (604) are arranged at intervals on the connecting plate (615).

5. The liquid injection device (6) according to claim 4, characterized in that: The liquid injection support (602) further includes a guide assembly (616), and the guide assembly (616) includes: A positioning bar (617), both ends of which are respectively connected to the mounting plate (614), the number of the positioning bars (617) being two, the two positioning bars (617) being arranged opposite to each other, and the space between the two positioning bars (617) being used to clamp the battery cell (7); A guide block (618) is arranged on the positioning bar (617). There are a plurality of guide blocks (618), and two adjacent guide blocks (618) are used to clamp one battery cell (7) from both sides.

6. The liquid injection device (6) according to claim 5, characterized in that Along the direction from the mounting plate (614) toward the base (601), the cross-sectional area of ​​the guide block (618) gradually decreases.

7. The liquid injection device (6) according to claim 5, characterized in that: The guide assembly (616) further comprises a limit block (619), wherein the limit block (619) is connected between two adjacent guide blocks (618) and is arranged at one end of the guide block (618) away from the base (601).

8. The liquid injection device (6) according to claim 5, characterized in that Along the direction from the mounting plate (614) toward the base (601), the length of the sleeve (611) is greater than the length of the guide block (618).

9. The liquid injection device (6) according to any one of claims 4 to 8, characterized in that: The telescopic assembly (605) further comprises a driving motor disposed between the column (613) and the mounting plate (614), wherein the driving motor is used to drive the mounting plate (614) to move toward the base (601).

10. The liquid injection device (6) according to any one of claims 5 to 8, characterized in that: The telescopic assembly (605) further comprises a mounting bolt, a plurality of fixing holes are provided at intervals on the mounting plate (614), at least one of the positioning strips (617) is provided with a mounting hole, and the mounting bolt passes through the mounting hole and extends into any one of the fixing holes to connect the positioning strip (617) and the mounting plate (614).

11. A battery manufacturing device, characterized in that: It comprises a liquid injection device (6) as claimed in any one of claims 1 to 10.

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