Battery liquid injection device and battery manufacturing equipment

Abstract

The utility model discloses a battery liquid injection device and battery manufacturing equipment. The battery liquid injection device comprises a limiting bracket and a clamping assembly, the limiting support is provided with a containing groove used for containing the battery single body, the clamping assembly is arranged in the containing groove, the surface of the side, facing the battery single body, of the clamping assembly is concaved inwards to form a deformation guide groove, and the clamping assembly is used for clamping the battery single body and limiting deformation of the battery single body in the liquid injection process. According to the battery liquid injection device and the battery manufacturing equipment disclosed by the invention, the deformation of the battery monomer in the liquid injection process can be limited, the secondary liquid overflow phenomenon after the liquid injection of the battery monomer is completed is reduced, and the damage of the battery monomer caused by liquid leakage is improved, so that the yield and the production efficiency of the battery are improved.

Description

Technical Field

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

[0002] Batteries are widely used in various electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy airplanes, electric toy ships, power tools and energy storage systems.

[0003] At present, how to improve the production efficiency of batteries is also one of the research issues in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery filling device and a battery manufacturing equipment, which can improve the yield rate and production efficiency of battery production.

[0005] In the first aspect, the present application provides a battery liquid injection device, comprising a limit bracket and a clamping assembly. The limit bracket has a receiving groove for receiving a battery cell, and the clamping assembly is arranged in the receiving groove. The surface of the clamping assembly facing the battery cell is concave to form a deformation guide groove, and the clamping assembly is used to clamp the battery cell and limit the deformation of the battery cell during the liquid injection process.

[0006] In the technical solution of the embodiment of the present application, a limiting bracket is provided to limit the battery cell, so as to facilitate the injection of liquid into the battery cell by the injection equipment and improve the alignment accuracy of the injection equipment. In addition, a clamping assembly is provided in the limiting bracket to limit the battery cell and reduce deformation during the battery injection process. In particular, a deformation guide groove is provided in the clamping assembly to limit the outer shell of the battery cell within the deformation guide groove. By providing the structure and size of the deformation guide groove, the battery cell can be guided to form plastic deformation within the deformation guide groove, thereby reducing the risk of overflow during the subsequent secondary electrolyte injection process, reducing the damage caused by the secondary overflow, and also improving the flatness of the surface of the battery cell outer shell, thereby improving the production efficiency and yield rate of the battery cell.

[0007] In some embodiments, the clamping assembly includes two clamping blocks arranged opposite to each other, a receiving cavity for receiving the battery cell is formed between the two clamping blocks, and at least one clamping block has a deformation guide groove. In the above structure, two clamping blocks are arranged in the clamping assembly to restrict the battery cell on both sides, and combined with the design of the buffer groove or the deformation guide groove, the accuracy of guiding the deformation direction of the battery cell can be improved, and the shape of the battery cell can be restricted to improve the flatness of the outer surface of the battery cell.

[0008] In some embodiments, the two clamping blocks are respectively provided with a deformation guide groove, and the two deformation guide grooves are arranged opposite to each other. In the above structure, the deformation of the two sides of the battery cell can be evenly guided, the symmetry of the internal space of the battery cell is improved, and the fluidity and wetting consistency of the electrolyte inside the battery cell are improved, thereby improving the stability of the battery cell operation.

[0009] In some embodiments, two clamping blocks are arranged along a first direction, and the thickness of the clamping blocks along a second direction gradually decreases and then gradually increases, and the second direction intersects the first direction. In the above structure, during the secondary injection process of the battery cell, the deformation of the middle part thereof is increased, which can compensate for the depression of the middle part of the battery cell during the formation process, and further improve the flatness of the surface of the battery cell.

[0010] In some embodiments, the limiting bracket includes a bottom plate, a first side plate, and two second side plates. The first side plate is arranged on the bottom plate, and at least two first side plates are arranged opposite to each other along a first direction. The two second side plates are arranged on the bottom plate, and the two second side plates are arranged opposite to each other along a second direction. The clamping assembly also includes a limiting block, which is arranged on the side of the second side plate facing the battery cell and is used to abut against the battery cell, and the limiting block is used to limit the deformation of the battery cell toward the second side plate.

[0011] In the above structure, the bottom plate, the first side plate and the second side plate are enclosed together to form a stable accommodation space, in which the battery cell is accommodated, so as to facilitate the operation of injecting liquid into the battery cell and improve the accuracy of the position of the battery cell. A shape limiting block is provided in the limiting bracket to limit the deformation of the battery cell along the second direction, and the deformation of the battery cell during the injection process is limited to both sides of the first direction, so as to improve the accuracy of the deformation control of the battery cell, compensate for the concave formed on the surface of the battery cell during the formation process, and improve the flatness of the surface of the battery cell.

[0012] In some embodiments, there are two shape-limiting blocks, which are arranged opposite to each other along the second direction, and the two shape-limiting blocks and the two clamping blocks together enclose a shape-limiting space for accommodating the battery cell. In the above structure, two shape-limiting blocks are arranged to further limit the deformation of the surface of the battery cell along the second direction, thereby improving the accuracy of the deformation control of the battery cell.

[0013] In some embodiments, the surface of the side of the shape-limiting block away from the bottom plate is concave to form a first concave portion, and the surface of the side of the second side plate away from the bottom plate is concave to form a second concave portion, and the first concave portion and the second concave portion are interconnected to form a positioning groove, and the positioning groove is used to accommodate the injection device. In the above structure, by providing the first concave portion and the second concave portion to accommodate the injection device, the second side plate and the shape-limiting block form support and limit for the injection device, thereby improving the accuracy and convenience of the battery cell injection.

[0014] In some embodiments, the number of first side plates is multiple, and the multiple first side plates are sequentially arranged along the first direction, and a receiving compartment is formed between two adjacent first side plates. The number of clamping assemblies is correspondingly set to multiple, and a clamping assembly is arranged in each receiving compartment. In the above structure, multiple spaces for accommodating battery cells are divided inside the limit bracket by arranging multiple first side plates, thereby increasing the number of battery cells in the limit bracket and improving the efficiency of liquid injection.

[0015] In some embodiments, the surface of the clamping block protrudes toward the first side plate to form a first convex portion, and the surface of the first side plate toward the clamping block is concave to form a first groove, the first groove extends along a third direction, the third direction intersects with the plane where the first direction and the second direction are located, and the first groove cooperates with the first convex portion to limit the movement of the clamping block relative to the first side plate. In the above structure, by providing the first convex portion and the first groove, the installation between the clamping block and the first side plate can be facilitated, and the installation efficiency and the accuracy of the installation position are improved.

[0016] In some embodiments, the clamping block is provided with a first through hole, the first side plate is provided with a second through hole corresponding to the first through hole, and the clamping assembly further includes a connecting member, which passes through the first through hole and the second through hole to connect the clamping block and the first side plate. In the above structure, the connection strength and stability between the clamping block and the first side plate are improved, and the control accuracy of the battery cell deformation during the injection process is improved.

[0017] In some embodiments, the limiting bracket further includes a third side plate disposed on the bottom plate, the third side plate being disposed between the two second side plates, and the bottom plate is provided with a plurality of mounting grooves spaced apart along the second direction, the mounting grooves being used to mount the third side plate. In the above structure, by adjusting the mounting position of the third side plate, the size of the storage compartment space can be adjusted, thereby adapting to battery cells of different shapes, and improving the adaptability of the limiting bracket.

[0018] In a second aspect, the present application provides a battery manufacturing device, which includes the battery liquid injection device in the above-mentioned embodiment.

[0019] 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

[0020] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0021] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0022] Figure 2 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0023] Figure 3 A schematic diagram of the structure of a square battery cell provided in some embodiments of the present application;

[0024] Figure 4 A schematic diagram of the structure of a battery liquid filling device provided in some embodiments of the present application;

[0025] Figure 5 A schematic diagram of the structure of a position limiting bracket provided in some embodiments of the present application;

[0026] Figure 6 A schematic diagram of the structure of a clamping assembly provided in some embodiments of the present application;

[0027] Figure 7 A schematic diagram of the structure of a clamping block provided in some embodiments of the present application;

[0028] Figure 8 A schematic diagram of the structure of the clamping assembly provided in some other embodiments of the present application.

[0029] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0030] 1. Vehicle; 2. Battery; 10. Electrode assembly; 20. Shell; 30. End cover; 40. Outer shell; 3. Controller; 4. Motor; 5. Box; 53. Accommodation space; 6. Battery cell; X, first direction; Y, second direction; Z, third direction; 7. Battery filling device; 701. Limiting bracket; 702. Clamping assembly; 703. Accommodation groove; 704. Deformation guide groove; 705. Clamping block; 708. Bottom plate; 709. First side plate; 710. Second side plate; 711. Limiting block; 712. First recess; 713. Second recess; 714. Positioning groove; 715. First groove; 716. First through hole; 717. Second through hole; 718. Connector; 719. Third side plate. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application will be 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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).

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0042] Battery cells may include but are not limited to lithium ion battery cells, sodium ion battery cells, sodium lithium ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium sulfur battery cells, magnesium ion battery cells, nickel metal hydride battery cells, nickel cadmium battery cells, lead storage battery cells, etc.

[0043] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no particular limitation in the present application.

[0044] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0045] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0046] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0047] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0048] like Figure 1 As shown, a battery 2 is disposed inside the vehicle 1, and the battery 2 may be disposed at the bottom, head, or 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.

[0049] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1 .

[0050] In some embodiments of the present application, the battery 2 can not only serve as an operating power source for the vehicle 1, but also serve 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.

[0051] Figure 2 Schematic diagram of the exploded structure of a battery provided for some embodiments of the present application.

[0052] In the battery 2, the battery cell 6 can be one or more. If there are more than one battery cell 6, the battery cells 6 can be connected in series, in parallel or in mixed connection. Mixed connection means that the battery cells 6 are both connected in series and in parallel. The battery cells 6 can be directly connected in series, in parallel or in mixed connection, and then the whole formed by the battery cells 6 is accommodated in the box 5; of course, the battery cells can also be connected in series, in parallel or in mixed connection to form a battery module, and then the battery modules are connected in series, in parallel or in mixed connection to form a whole, and then accommodated in the box 5.

[0053] In some optional embodiments, the battery cells 6 may also be directly accommodated in the box body 5 to reduce the connecting components or supporting components required to form the battery module and improve the energy density of the battery 2.

[0054] For example, the battery cell 6 may be the smallest unit constituting the battery 2 .

[0055] Figure 3 A schematic diagram of the structure of a square battery cell provided in some embodiments of the present application.

[0056] like Figure 3 As shown, in some embodiments, the battery cell 6 includes a housing 40 and an electrode assembly 10 accommodated in the housing 40. In some embodiments, the battery cell 6 includes an electrode terminal. The electrode terminal is electrically connected to the electrode assembly 10 for outputting or inputting electrical energy of the battery cell 6.

[0057] In some embodiments, the battery cell 6 further includes an electrolyte contained in the housing 40. The electrolyte plays a role in conducting ions between the positive and negative electrodes and can be in liquid, gel or solid state.

[0058] The housing 40 is used to encapsulate the electrode assembly 10 and the electrolyte and other components. The housing 40 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 40), or an aluminum-plastic film. The housing 40 may include an end cap 30 and a housing 20, and the electrode terminal and the injection hole are provided on the end cap 30.

[0059] The production of battery cells usually includes processes such as electrode assembly into the shell, shell sealing, primary liquid injection, battery cell formation, capacity division, and secondary liquid injection. After the primary liquid injection is completed, the surface of the battery cell shell is flat. During the formation of the battery cell, a negative pressure mechanism is required to absorb the gas generated inside the battery cell shell. A small amount of electrolyte will be absorbed during the absorption process, resulting in insufficient electrolyte inside the battery cell. At the same time, it will also cause the internal air pressure of the battery cell to decrease, forming a pressure difference with the external air pressure, causing the surface of the shell to sag. Therefore, it is necessary to perform secondary liquid injection on the battery cell to replenish the electrolyte. In the related art, the liquid injection device directly injects liquid into the battery cell with a depression on the surface. Since the surface of the battery cell has already produced a concave deformation, the electrolyte injected in the secondary liquid injection will overflow from the injection hole, and the loss of electrolyte will also cause damage to the components on the end cover of the battery cell.

[0060] In order to improve the above problems, the embodiment of the present application provides a battery injection device, which sets a limit bracket to limit the battery cell, so as to facilitate the injection of the battery cell by the injection device and improve the accuracy of the alignment of the injection device. A clamping assembly is set in the limit bracket to limit the battery cell, so as to reduce the deformation of the battery during the injection process. In addition, a certain positive pressure is applied to the inside of the battery cell at the same time during the secondary injection to correct the depression of the shell.

[0061] Since a deformation guide groove is provided in the clamping assembly, the deformation of the battery cell shell after being subjected to positive pressure is limited within the deformation guide groove. By setting the structure and size of the deformation guide groove, the direction and shape of the deformation of the battery cell in the deformation guide groove can be guided, thereby correcting the depression of the shell. Therefore, the secondary injection process can proceed normally, reducing the risk of overflow during the subsequent electrolyte secondary injection process, improving the damage caused by the secondary overflow, and also improving the flatness of the battery cell shell surface, thereby improving the battery cell production efficiency and yield rate.

[0062] Please refer to Figures 4 to 6 , Figure 4 This is a schematic diagram of the structure of a battery liquid filling device provided in some embodiments of the present application. Figure 5 A schematic diagram of the structure of a limit bracket provided in some embodiments of the present application, Figure 6 A schematic diagram of the structure of a clamping assembly provided in some embodiments of the present application.

[0063] As shown in the figure, the battery filling device 7 provided in the embodiment of the present application includes a limiting bracket 701 and a clamping assembly 702. The limiting bracket 701 has a receiving groove 703 for receiving the battery cell 6, and the clamping assembly 702 is arranged in the receiving groove 703. The surface of the clamping assembly 702 facing the battery cell 6 is concave to form a deformation guide groove 704, and the clamping assembly 702 is used to clamp the battery cell 6 and limit the deformation of the battery cell 6 during the filling process.

[0064] The limiting bracket 701 is used to support the battery cell 6, and is used to support the battery cell 6 and limit the battery cell 6. The receiving groove 703 on the limiting bracket 701 corresponds to the injection nozzle of the injection device, which is convenient for injecting liquid into the battery cell 6 and improving the injection accuracy. The receiving groove 703 can be a groove formed on the base, and the shape of the receiving groove 703 can match the outer structure of the battery cell 6. Or the receiving groove 703 can be formed by enclosing a plurality of plate-like or block-like structures to limit the battery cell 6. The number of the receiving grooves 703 can be multiple, so as to inject liquid into a plurality of battery cells 6 simultaneously or sequentially to improve the injection efficiency.

[0065] The clamping assembly 702 is a block structure disposed between the limiting bracket 701 and the battery cell 6. A part of the structure of the clamping assembly 702 is used to abut against the battery cell 6 to form a contact connection with the battery cell 6, and another part of the clamping assembly 702 is used to be spaced apart from the battery cell 6 to form a deformation guide groove 704. Optionally, the deformation guide groove 704 can be based on the design information such as the material, thickness, size, electrolyte usage and electrolyte density of the battery cell 6 shell 40, combined with the power battery 2 process information such as the injection positive pressure and time, and by means of simulation, the deformation of the shell 40 of the battery cell 6 of the design when the liquid is injected under the corresponding process conditions is obtained. The deformation guide groove 704 is obtained by calculation, and the deformation guide groove 704 can guide the shell 40 of the battery cell 6 to move toward the clamping assembly 702 during the secondary liquid injection of the battery cell 6, and the shell 40 will at least partially fill the deformation guide groove 704, and form a slightly convex structure relative to the plane under the positive pressure of the secondary liquid injection, compensate for the concave formed during the formation, and improve the flatness of the surface of the shell 20. It can be understood that after the secondary liquid injection and sealing of the battery are completed, the slightly convex structure will be flattened due to the disappearance of the positive pressure, thereby maintaining the flatness of the surface of the battery cell 6.

[0066] Optionally, the deformation guide groove 704 guides the shell 40 to form plastic deformation, thereby reducing the risk of electrolyte overflowing from the injection hole due to the depression of the shell 40 during the secondary injection process.

[0067] Optionally, the clamping assembly 702 is disposed relative to the large side surface of the battery cell 6. The large side surface refers to the side surface with the largest area in the housing 20, and is also the side surface that is most likely to form a depression during the formation process.

[0068] In the technical solution of the embodiment of the present application, a limiting bracket 701 is provided to limit the battery cell 6, so as to facilitate the injection of liquid into the battery cell 6 by the injection device and improve the alignment accuracy of the injection device. In addition, a clamping assembly 702 is provided in the limiting bracket 701 to limit the battery cell 6 and reduce the deformation of the battery cell 6 during the injection process. In particular, a deformation guide groove 704 is provided in the clamping assembly 702 to guide the outer shell 40 of the battery cell 6 into the deformation guide groove 704. By providing the structure and size of the deformation guide groove 704, the deformation shape and size of the outer shell 40 of the battery cell 6 under the action of positive pressure can be guided, the risk of electrolyte overflow after secondary injection can be reduced, the damage caused by secondary overflow can be improved, and the flatness of the surface of the outer shell 40 of the battery cell 6 can be improved, thereby improving the production efficiency and yield rate of the battery cell 6.

[0069] like Figure 6 As shown, in some embodiments of the present application, the clamping assembly 702 includes two clamping blocks 705 arranged opposite to each other, a receiving cavity for receiving the battery cell 6 is formed between the two clamping blocks 705, and at least one clamping block 705 has a deformation guide groove 704.

[0070] In the above structure, the two clamping blocks 705 are arranged relative to each other, which can form a stable clamping structure, limit the movement of the battery cell 6, and ensure its stability during operation. The deformation guide groove 704 provided on at least one clamping block 705 guides the deformation direction of the battery cell 6 when subjected to external force. The deformation range of the battery cell 6 can be controlled to reduce local damage or shape distortion caused by uneven force. By accurately designing the deformation guide groove 704, the deformation of the battery cell 6 in a specific direction can be limited, thereby maintaining the flatness of its outer surface, improving the sealing, heat dissipation efficiency and overall structural stability of the battery cell 6.

[0071] In some embodiments of the present application, the two clamping blocks 705 are respectively provided with a deformation guide groove 704, and the two deformation guide grooves 704 are arranged opposite to each other. Optionally, the two clamping blocks 705 have the same structure.

[0072] In the above structure, the symmetrically arranged clamping blocks 705 can evenly guide the deformation on both sides of the battery cell 6. Since the clamping blocks 705 are relatively arranged. Exemplarily, the two clamping blocks 705 are symmetrically arranged on both sides of the battery cell 6. The space inside the battery cell 6 also presents a higher symmetry accordingly. This symmetry of the internal space helps to improve the fluidity of the electrolyte, so that the electrolyte can be more evenly distributed in various parts of the battery cell 6, thereby improving the wetting consistency. The symmetry of the internal space and the balanced guidance of the clamping blocks 705 help to reduce the resistance to the flow of the electrolyte, so that the electrolyte can circulate more smoothly inside the battery cell 6. This helps to improve the charging and discharging efficiency and performance of the battery cell 6.

[0073] Balanced deformation guidance and internal spatial symmetry help reduce stress concentration inside the battery cell 6. When the battery cell 6 is subjected to external impact or temperature changes, the uniform distribution of internal stress can reduce damage to the battery 2 structure and improve the impact resistance and durability of the battery cell 6. By improving electrolyte fluidity, infiltration consistency and reducing internal stress, this symmetrical clamping design can significantly improve the overall performance of the battery cell 6, including improving charging and discharging efficiency, extending cycle life, and improving thermal management effects.

[0074] Therefore, the above structure can improve the symmetry of the internal space of the battery cell 6, so that the fluidity and wetting consistency of the electrolyte inside the battery cell 6 are improved, thereby improving the stability of the operation of the battery cell 6.

[0075] In some embodiments of the present application, two clamping blocks 705 are arranged along the first direction X, and the thickness of the clamping blocks 705 gradually decreases and then gradually increases along the second direction Y. The above structure forms a deformation guide groove 704 structure similar to an arc.

[0076] In the above structure, during the secondary liquid injection process of the battery cell 6 , the deformation of the middle part of the battery cell 6 is increased, which can compensate for the depression of the middle part of the battery cell 6 during the formation process and further improve the flatness of the surface of the battery cell 6 .

[0077] In some optional embodiments, along the third direction Z, the thickness of the clamping block 705 first gradually decreases and then gradually increases, and the third direction Z intersects with the plane where the first direction X and the second direction Y are located. The above structure forms a semi-spherical deformation guide groove 704 structure. This structure can effectively improve the flatness of the battery cell 6 housing 40, thereby improving the manufacturing efficiency, operation stability and overall performance of the battery cell 6.

[0078] like Figure 4As shown in FIG. 5 , in some embodiments of the present application, the limiting bracket 701 includes a bottom plate 708, a first side plate 709, and two second side plates 710. The first side plate 709 is disposed on the bottom plate 708, and at least two first side plates 709 are disposed opposite to each other along a first direction X. The two second side plates 710 are disposed on the bottom plate 708, and the two second side plates 710 are disposed opposite to each other along a second direction Y. The clamping assembly 702 also includes a limiting block 711, which is disposed on the side of the second side plate 710 facing the battery cell 6 and is used to abut against the battery cell 6, and the limiting block 711 is used to limit the deformation of the battery cell 6 toward the second side plate 710.

[0079] As the basis of the entire limiting bracket 701, the bottom plate 708 provides a stable support surface to ensure the stability of the entire bracket structure. At least two first side plates 709 are arranged relatively along the first direction X, and they and the bottom plate 708 together constitute one of the main boundaries of the accommodating space 53. The main function of the first side plate 709 is to limit the movement and deformation of the battery cell 6 in the first direction X, and improve the stability of the battery cell 6 in this direction. The two second side plates 710 are arranged relatively along the second direction Y, and together with the bottom plate 708 and the first side plate 709, they enclose a closed accommodating space 53. This space provides a safe and stable storage environment for the battery cell 6, which is convenient for subsequent operations. During the process of injecting liquid into the battery cell 6, the battery cell 6 may be deformed due to changes in internal pressure. The existence of the limiting block 711 can limit these deformations to both sides of the first direction X, and limit the unnecessary depression or protrusion of the battery cell 6 in the second direction Y, thereby improving the accuracy of the deformation control of the battery cell 6.

[0080] The stable accommodation space 53 enclosed by the bottom plate 708, the first side plate 709 and the second side plate 710 ensures the position accuracy of the battery cell 6 therein, which is convenient for subsequent operations such as injection and testing. The design of the shape limiting block 711 effectively controls the deformation of the battery cell 6 during the injection process. By limiting the deformation on both sides of the first direction X and compensating for the concave formed by the outer shell 40 during the formation process, the flatness of the surface of the battery cell 6 is improved. The stable fixing structure and precise deformation control help reduce the damage and rework rate of the battery cell 6 during the manufacturing process, thereby improving manufacturing efficiency and product quality.

[0081] like Figure 8 As shown, in some embodiments of the present application, there are two shape-limiting blocks 711 , and the two shape-limiting blocks 711 are arranged opposite to each other along the second direction Y. The two shape-limiting blocks 711 and the two clamping blocks 705 together enclose a shape-limiting space for accommodating the battery cell 6 .

[0082] The two limiting blocks 711 are arranged relatively along the second direction Y, and they are in close contact with the two sides of the battery cell 6, forming a double restriction on the deformation of the battery cell 6 along this direction. This double restriction mechanism is more effective than a single limiting block 711, and can more accurately control the deformation of the battery cell 6 during the injection, formation and other processes. By limiting the deformation of the battery cell 6 along the second direction Y, especially preventing its surface from being concave or convex in this direction, the limiting block 711 helps to further improve the flatness of the surface of the battery cell 6. The clamping block 705 and the limiting block 711 work together to improve the control accuracy of the deformation of the battery cell 6. The clamping block 705 mainly limits the deformation of the battery cell 6 in the first direction X, while the limiting block 711 focuses on the second direction Y to reduce the occurrence of local deformation.

[0083] like Figure 4 , Figure 5 as well as Figure 8 As shown, in some embodiments of the present application, the side surface of the limiting block 711 facing away from the bottom plate 708 is concave to form a first recess 712, and the side surface of the second side plate 710 facing away from the bottom plate 708 is concave to form a second recess 713. The first recess 712 and the second recess 713 are interconnected to form a positioning groove 714, and the positioning groove 714 is used to accommodate the liquid injection equipment.

[0084] In the above structure, the first recess 712 and the second recess 713 are provided to accommodate the injection device, so that the second side plate 710 and the limiting block 711 form support and limit for the injection device, thereby improving the accuracy and convenience of injection of the battery cell 6.

[0085] In some embodiments of the present application, the number of first side plates 709 is multiple, and the multiple first side plates 709 are sequentially arranged along the first direction X, and a receiving compartment is formed between two adjacent first side plates 709. The number of clamping assemblies 702 is correspondingly set to multiple, and each receiving compartment is provided with a clamping assembly 702. In the above structure, by providing multiple first side plates 709, multiple spaces for accommodating battery cells 6 are divided inside the limiting bracket 701, thereby increasing the number of battery cells 6 in the limiting bracket 701 and improving the efficiency of liquid injection.

[0086] like Figure 5 As shown, in some embodiments of the present application, the surface of the clamping block 705 protrudes toward the first side plate 709 to form a first convex portion, and the surface of the first side plate 709 toward the clamping block 705 is concave to form a first groove 715, and the first groove 715 extends along a third direction Z, and the third direction Z intersects with the plane where the first direction X and the second direction Y are located, and the first groove 715 cooperates with the first convex portion to limit the movement of the clamping block 705 relative to the first side plate 709.

[0087] The design of the first convex portion enables the clamping block 705 to quickly find the correct installation position when approaching the first side plate 709. The first groove 715 provides a space that matches the first convex portion, ensuring that the clamping block 705 can move along the first groove 715 and accurately embed therein, reducing the adjustment time during the installation process and improving the installation efficiency. When the first convex portion is fully embedded in the first groove 715, a stable connection is formed between the clamping block 705 and the first side plate 709. This connection limits the movement of the clamping block 705 in the first direction X and the second direction Y, reducing the risk of the clamping block 705 shaking or falling off when subjected to external force. Due to the guiding effect of the first convex portion and the first groove 715, the installer can more easily install the clamping block 705 on the first side plate 709 without complicated alignment or adjustment steps. This design reduces the difficulty of installation and improves installation efficiency.

[0088] like Figure 5 , Figure 7 as well as Figure 8 As shown, in some embodiments of the present application, the clamping block 705 is provided with a first through hole 716, the first side plate 709 is provided with a second through hole 717 corresponding to the first through hole 716, and the clamping assembly 702 further includes a connecting member 718, which passes through the first through hole 716 and the second through hole 717 to connect the clamping block 705 and the first side plate 709. In the above structure, the connection strength and stability between the clamping block 705 and the first side plate 709 are improved, and the control accuracy of the deformation of the battery cell 6 during the injection process is improved.

[0089] like Figure 5 as well as Figure 8 As shown, in some embodiments of the present application, the limiting bracket 701 further includes a third side plate 719 disposed on the bottom plate 708, the third side plate 719 is disposed between the two second side plates 710, and the bottom plate 708 is provided with a plurality of mounting grooves spaced along the second direction Y, and the mounting grooves are used to mount the third side plate 719. In the above structure, by adjusting the mounting position of the third side plate 719, the size of the accommodating compartment space can be adjusted, thereby adapting to battery cells 6 of different shapes, and improving the adaptability of the limiting bracket 701.

[0090] In an optional embodiment, the liquid injection device of the battery cell 6 includes a limit bracket 701 and a clamping assembly 702. The limit bracket 701 has a receiving groove 703 for accommodating the battery cell 6, and the clamping assembly 702 is arranged in the receiving groove 703. The surface of the clamping assembly 702 facing the battery cell 6 is concave to form a deformation guide groove 704, and the clamping assembly 702 is used to clamp the battery cell 6 and limit the deformation of the battery cell 6 during the liquid injection process. The clamping assembly 702 includes two clamping blocks 705 arranged opposite to each other, and a receiving cavity for accommodating the battery cell 6 is formed between the two clamping blocks 705. The two clamping blocks 705 are symmetrically arranged on opposite sides of the battery cell 6. The two clamping blocks 705 are arranged along the first direction X, and along the second direction Y, the thickness of the clamping blocks 705 gradually decreases and then gradually increases. The limit bracket 701 includes a bottom plate 708, a first side plate 709 and two second side plates 710. The first side plate 709 is arranged on the bottom plate 708, and at least two first side plates 709 are arranged opposite to each other along the first direction X. Two second side plates 710 are arranged on the bottom plate 708, and the two second side plates 710 are arranged opposite to each other along the second direction Y. The clamping assembly 702 also includes a limiting block 711, which is arranged on the side of the second side plate 710 facing the battery cell 6 and is used to abut against the battery cell 6. The limiting block 711 is used to limit the deformation of the battery cell 6 toward the second side plate 710. There are two limiting blocks 711, and the two limiting blocks 711 are arranged opposite to each other along the second direction Y. The two limiting blocks 711 and the two clamping blocks 705 together enclose a limiting space for accommodating the battery cell 6.

[0091] The embodiment of the present application also provides a battery manufacturing device, which includes the liquid injection device of the battery cell 6 in the above embodiment. A limiting bracket 701 is provided in the liquid injection device to limit the battery cell 6, so as to facilitate the liquid injection device to inject liquid into the battery cell 6 and improve the accuracy of the alignment of the liquid injection device. In addition, a clamping assembly 702 is provided in the limiting bracket 701 to limit the battery cell 6 and reduce the deformation of the battery cell 6 during the liquid injection process. In particular, a deformation guide groove 704 is provided in the clamping assembly 702 to guide the shell 40 of the battery cell 6 into the deformation guide groove 704. By setting the structure and size of the deformation guide groove 704, the direction and shape of the deformation of the battery cell 6 in the deformation guide groove 704 can be guided, the risk of electrolyte overflow during the secondary liquid injection process is reduced, the damage caused by the secondary overflow is improved, and the flatness of the surface of the shell 40 of the battery cell 6 can be improved, thereby improving the production efficiency and yield rate of the battery cell 6.

[0092] 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 battery filling device, characterized in that: include: A limiting bracket having a receiving groove for receiving a battery cell; The clamping assembly is arranged in the accommodating groove. The surface of the clamping assembly on one side facing the battery cell is concave to form a deformation guide groove. The clamping assembly is used to clamp the battery cell and limit the deformation of the battery cell during the liquid injection process.

2. The battery liquid injection device according to claim 1, characterized in that: The clamping assembly comprises two clamping blocks arranged opposite to each other, a receiving cavity for receiving a battery cell is formed between the two clamping blocks, and at least one of the clamping blocks is provided with the deformation guide groove.

3. The battery liquid filling device according to claim 2, characterized in that: A deformation guide groove is respectively provided on the two clamping blocks, and the two deformation guide grooves are arranged opposite to each other.

4. The battery liquid filling device according to claim 3, characterized in that: The two clamping blocks are arranged along a first direction, and the thickness of the clamping blocks along a second direction first gradually decreases and then gradually increases, and the second direction intersects with the first direction.

5. The battery liquid filling device according to claim 4, characterized in that: The limiting bracket comprises: Base plate; A first side plate, disposed on the bottom plate, wherein at least two of the first side plates are disposed opposite to each other along the first direction; Two second side plates are arranged on the bottom plate, and the two second side plates are arranged opposite to each other along the second direction. The clamping assembly further includes a shape limiting block, which is disposed on a side of the second side plate facing the battery cell and is used to abut against the battery cell. The shape limiting block is used to limit deformation of the battery cell toward the second side plate.

6. The battery liquid injection device according to claim 5, characterized in that: There are two shape-limiting blocks, and the two shape-limiting blocks are arranged opposite to each other along the second direction. The two shape-limiting blocks and the two clamping blocks jointly enclose a shape-limiting space for accommodating a battery cell.

7. The battery liquid injection device according to claim 5, characterized in that: The surface of the limiting block on one side away from the bottom plate is concave to form a first concave portion, and the surface of the second side plate on one side away from the bottom plate is concave to form a second concave portion. The first concave portion and the second concave portion are interconnected to form a positioning groove, and the positioning groove is used to accommodate the liquid injection equipment.

8. The battery liquid filling device according to claim 5, characterized in that: There are multiple first side panels, which are arranged in sequence along the first direction, and a storage bin is formed between two adjacent first side panels. The number of the clamping assemblies is correspondingly set to multiple, and one clamping assembly is arranged in each storage bin.

9. The battery liquid filling device according to any one of claims 6 to 8, characterized in that: The surface of the clamping block protrudes toward the first side plate to form a first convex portion, and the surface of the first side plate toward the clamping block is concave to form a first groove, the first groove extends along a third direction, and the third direction intersects with the plane where the first direction and the second direction are located, and the first groove cooperates with the first convex portion to limit the movement of the clamping block relative to the first side plate.

10. The battery liquid filling device according to claim 9, characterized in that: The clamping block is provided with a first through hole, the first side plate is provided with a second through hole corresponding to the first through hole, and the clamping assembly further includes a connecting member, which passes through the first through hole and the second through hole to connect the clamping block and the first side plate.

11. The battery liquid injection device according to any one of claims 6 to 8, characterized in that: The limiting bracket also includes a third side plate arranged on the bottom plate, the third side plate is arranged between the two second side plates, and the bottom plate is provided with a plurality of mounting grooves spaced apart along the second direction, the mounting grooves are used to mount the third side plate.

12. A battery manufacturing device, characterized in that: The invention comprises a battery liquid filling device as claimed in any one of claims 1 to 11.

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