Transport containers and battery production lines

Abstract

The embodiment of the present application provides a transport container and a battery production line, the transport container is used for transporting the end caps or shells of battery cells, the transport container includes a main body and a wear-resistant layer, the main body is used to support the end caps or shells; the wear-resistant layer covers at least part of the main body and together forms a plurality of receiving grooves, the receiving grooves are used to receive the end caps or shells, and the wear-resistant layer is used to contact the end caps or shells; wherein the material of either the main body or the wear-resistant layer is plastic or a composite material with plastic as a matrix, and the wear resistance of the wear-resistant layer is greater than the wear resistance of the main body. The present application can improve the yield rate of battery cell welding.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a transport container and a battery production line. Background Art

[0002] Battery monomers 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 and electric tools, etc.

[0003] In the development of battery technology, how to improve the yield rate of battery cell welding is a research direction in battery technology. Utility Model Content

[0004] The present application provides a transport container and a battery production line, which can improve the yield rate of battery cell welding.

[0005] An embodiment of the present application provides a transport container for transporting end caps or shells of battery cells, the transport container includes a main body and a wear-resistant layer, the main body is used to support the end caps or shells; the wear-resistant layer covers at least part of the main body and together forms a plurality of receiving grooves, the receiving grooves are used to receive the end caps or shells, and the wear-resistant layer is used to contact the end caps or shells; wherein the material of either the main body or the wear-resistant layer is plastic or a composite material with plastic as a matrix, and the wear resistance of the wear-resistant layer is greater than the wear resistance of the main body.

[0006] In the above technical scheme, the transport container of the embodiment of the present application is formed by covering at least a portion of the main body with a wear-resistant layer, and the material of either the main body or the wear-resistant layer is plastic or a composite material with plastic as a matrix, and the wear resistance of the wear-resistant layer is greater than the wear resistance of the main body. In this way, compared with the direct contact between the main body and the end cover or the shell, the contact between the wear-resistant layer and the end cover or the shell can reduce impurities such as organic matter generated by scratches, reduce the occurrence of welding defects, and improve the yield rate of battery cell welding.

[0007] In some embodiments, the material of the main body includes one of acrylonitrile-butadiene-styrene copolymer, polyvinyl chloride, polyethylene, polypropylene, polystyrene or polyamide, and the material of the wear-resistant layer includes thermoplastic polyurethane or polyurethane.

[0008] In the above technical solution, the material of the main body and the material of the wear-resistant layer are both set to plastic, which is easy to process and has low cost. In addition, thermoplastic polyurethane and polyurethane as the wear-resistant layer have good wear resistance, further reducing organic matter and other impurities generated by scratching the end cover or the shell, and improving the yield rate of battery cell welding.

[0009] In some embodiments, at least one side wall of the receiving groove includes a wall body and a protrusion, wherein the protrusion is arranged on a side of the wall body facing the receiving groove and is used to limit the area to be welded of the shell or the area to be welded of the end cover.

[0010] In the above technical solution, a protrusion is provided, and the protrusion located on the wall body is used to limit the area to be welded of the shell or the area to be welded of the end cover, which can reduce the contact area when the wall body directly limits the end cover or the shell, thereby further reducing impurities such as organic matter generated by scratches and improving the yield rate of battery cell welding.

[0011] In some embodiments, the protrusion is a convex strip structure, and the convex strip structure extends from the opening of the accommodating groove to the bottom wall of the accommodating groove.

[0012] In the above technical solution, the end cover or shell can be aligned and inserted into the receiving groove when the end cover or shell enters, further reducing the possible scratches between the protrusion and the end cover or shell, and improving the welding yield of the battery cell.

[0013] In some embodiments, the receiving groove is used to receive the end cover, and each side wall of the receiving groove is provided with a convex strip structure.

[0014] In the above technical solution, since the entire outer edge of the end cover is the area to be welded, a convex strip structure is provided on each side wall of the receiving groove to further reduce impurities such as organic matter generated by the scratches between the transfer container and the end cover, thereby improving the yield rate of battery cell welding.

[0015] In some embodiments, the receiving groove is used to receive the shell, the shell has an opening, and the side wall of the receiving groove facing the opening is provided with a convex strip structure.

[0016] In the above technical solution, the processing difficulty can be reduced and the cost can be reduced.

[0017] In some embodiments, the convex strip structure includes an inclined portion, which extends from the opening of the receiving groove to the bottom wall of the receiving groove, and along the first direction, the protruding height of the inclined portion relative to the wall body gradually increases, wherein the first direction is the direction from the opening of the receiving groove to the bottom wall of the receiving groove.

[0018] In the above technical solution, the inclined portion not only serves as a guide when the shell or the end cover enters, but also further reduces impurities such as organic matter generated by scratches with the shell or the end cover, further improving the welding yield of the battery cell.

[0019] In some embodiments, the convex strip structure further includes a limiting portion, the inclined portion and the limiting portion are arranged in sequence and connected along the first direction, and any protruding height of the limiting portion relative to the wall body is the same as the maximum protruding height of the inclined portion relative to the wall body.

[0020] In the above technical solution, the limiting effect of the protrusion on the shell or the end cover can be improved.

[0021] In some embodiments, the end portion of at least one side wall of the accommodating groove where it is connected to the adjacent side wall is recessed in a direction away from the accommodating groove to form an escape space, and the escape space is used to escape the corner of the end cover or the corner of the shell.

[0022] In the above technical solution, the scratches at the corners between the transfer container and the end cover or the corners of the shell can be reduced, and the generation of impurities such as organic matter can be reduced.

[0023] In some embodiments, an end portion of at least one side wall of the accommodating groove connected to an adjacent side wall is bent in a direction away from the accommodating groove to form an arc segment, and the arc segment constitutes an avoidance space.

[0024] In the above technical solution, an arc segment is provided, which is relatively smooth and convenient for cleaning after use, thereby reducing residual impurities.

[0025] In some embodiments, at least one side wall of any two adjacent side walls of the accommodating groove forms an escape space.

[0026] In the above technical solution, the interference between the transfer container and the corners of the end cover or the corners of the shell can be further reduced, the generation of impurities such as organic matter can be reduced, and the subsequent removal of the end cover or the shell can be facilitated.

[0027] In some embodiments, the accommodating groove is used to accommodate the shell, the shell has an opening, and the bottom wall of the accommodating groove is used to be recessed at one end facing the opening to form an avoidance groove, and is used to avoid the bottom edge of the opening surrounded by the shell.

[0028] In the above technical solution, an avoidance groove is provided to accommodate the bottom edge of the opening surrounded by the shell, thereby reducing organic matter generated by the scratches between the bottom edge of the shell and the bottom wall, and improving the welding yield of the battery cell.

[0029] In some embodiments, the wear-resistant layer is wrapped around the body portion.

[0030] In the above technical solution, not only can the wear resistance of the transfer container be improved, but the wear-resistant layer and the main body are also not easily separated, thereby improving the reliability of the use of the transfer container.

[0031] In a second aspect, the present application also provides a battery production line, including the above-mentioned transport container and welding mechanism. The transport container is used to transport the end cap or shell of the square shell battery monomer; the welding mechanism is used to weld the end cap and shell of the transported square shell battery monomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0033] Figure 1 A schematic diagram of a battery production line provided for some embodiments of the present application;

[0034] Figure 2 A schematic diagram of a structure of a transport container provided in some embodiments of the present application, which is used to accommodate a shell;

[0035] Figure 3 A partial cross-sectional view of a side wall of a transport container provided for some embodiments of the present application;

[0036] Figure 4 for Figure 2 A magnified view at point A;

[0037] Figure 5 Another schematic diagram of the structure of a transport container provided in some embodiments of the present application, which is used to accommodate an end cap;

[0038] Figure 6 for Figure 5 Enlarged view at B;

[0039] Figure 7 A schematic diagram of the structure of the protrusion in the side wall of the transfer container provided in some embodiments of the present application.

[0040] The reference numerals of the specific embodiments are as follows:

[0041] 100, battery production line; 200, transport container; 300, welding mechanism; 400, assembly mechanism; 500, housing; 501, second side; 600, end cover; 601, first side;

[0042] 1. Body part;

[0043] 2. Wear-resistant layer;

[0044] 3. Receiving tank;

[0045] 4. side wall; 41. wall body; 42. protrusion; 421. inclined portion; 422. limiting portion; 43. arc segment;

[0046] 5. Bottom wall;

[0047] 6. Avoidance slot;

[0048] X, first direction. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0051] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] 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.

[0054] 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.

[0055] The term “plurality” used in this application refers to two or more (including two).

[0056] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0057] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector includes a positive coating area and a positive electrode ear connected to the positive coating area. The positive coating area is coated with a positive active material layer, and the positive electrode ear is not coated with a positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0058] During the production of battery cells, the shell and end cap need to be stacked in a transfer tray and then transported to the next process to remove the shell and end cap and assemble them with other components. After assembly, the shell and end cap need to be welded, such as by laser welding.

[0059] During the welding process, dirt and foreign matter on the weld can easily affect the welding effect. The edge of the end cap and the opening of the shell need to be welded. If these areas are scratched with the transfer plate, organic foreign matter will be generated and remain in the scratched area, resulting in black explosion point defects in the welding process, reducing the welding yield of the battery cell.

[0060] In view of this, the present application provides a transfer container, which covers at least part of the main body with a wear-resistant layer. The main body plays a supporting role and provides the structural strength required for the transfer container, and the wear resistance of the wear-resistant layer is greater than the wear resistance of the main body, thereby reducing impurities such as organic matter generated by scratches between the transfer container and the end cover or the shell, reducing the generation of welding defects such as black explosive point defects, and improving the yield rate of battery cell welding.

[0061] Figure 1 A schematic diagram of the structure of a battery production line provided for some embodiments of the present application.

[0062] like Figure 1 As shown, an embodiment of the present application provides a battery production line 100, which includes a transfer container 200 and a welding mechanism 300. The transfer container 200 is used to transfer the end cover 600 or the shell 500 of the square shell battery cell, and the welding mechanism 300 is used to weld and connect the end cover 600 and the shell 500 of the transferred square shell battery cell.

[0063] The welding mechanism 300 of the embodiment of the present application can weld the end cover 600 and the shell 500 together by laser welding, spot welding, argon arc welding, etc.

[0064] Exemplarily, the battery production line 100 further includes an assembly mechanism 400 , which is used to assemble components such as electrode assemblies and adapters in the housing 500 . The assembly mechanism 400 is located upstream of the welding mechanism 300 .

[0065] The assembly mechanism 400 of the embodiment of the present application may be a robot or a loading manipulator.

[0066] Figure 2 A schematic diagram of a structure of a transport container provided in some embodiments of the present application, which is used to accommodate a shell; Figure 3 A partial cross-sectional view of a side wall of a transport container provided for some embodiments of the present application.

[0067] like Figure 2 and Figure 3 As shown, the embodiment of the present application provides a transport container 200 for transporting the end cap 600 or the shell 500 of the battery cell. The transport container 200 includes a main body 1 and a wear-resistant layer 2, wherein the main body 1 is used to support the end cap 600 or the shell 500; the wear-resistant layer 2 covers at least part of the main body 1 and together forms a plurality of receiving grooves 3, the receiving grooves 3 are used to receive the end cap 600 or the shell 500, and the wear-resistant layer 2 is used to contact the end cap 600 or the shell 500; wherein the material of either the main body 1 or the wear-resistant layer 2 is plastic or a composite material with plastic as a matrix, and the wear resistance of the wear-resistant layer 2 is greater than the wear resistance of the main body 1.

[0068] The wear resistance of the embodiment of the present application refers to the ability of a material to resist surface loss under the action of external forces such as friction, wear or impact.

[0069] The wear resistance of the main body 1 and the wear-resistant layer 2 of the embodiment of the present application can be measured using the standard of GB / T 4084-2008.

[0070] The material of the main body 1 of the embodiment of the present application may be plastic or a composite material with plastic as a matrix, and the material of the wear-resistant layer 2 may be plastic or a composite material with plastic as a matrix.

[0071] Exemplarily, the material of the main body 1 and the wear-resistant layer 2 are both plastic. Optionally, the material of the main body 1 is polyetheretherketone.

[0072] For example, the material of the main body 1 is plastic, and the material of the wear-resistant layer 2 is a composite material with plastic as the matrix. Among them, the reinforcing material in the composite material with plastic as the matrix can be glass fiber or carbon fiber, and the matrix material can be polyvinyl chloride, polyethylene or polypropylene.

[0073] The body 1 and the wear-resistant layer 2 of the embodiment of the present application jointly form a receiving groove 3, that is, the outer layer of the side wall 4 or the bottom wall 5 surrounding the receiving groove 3 is the wear-resistant layer 2, and the inner layer is the body 1. The body 1 plays a role in providing support strength.

[0074] Illustratively, during the manufacturing process, the wear-resistant layer 2 is bonded to the main body 1 so that the portion of the transport container that contacts the end cover 600 or the shell 500 is the wear-resistant layer 2 .

[0075] The wear-resistant layer 2 of the embodiment of the present application may not cover the bottom surface or the outer side surface of the main body 1 .

[0076] The battery cell of the embodiment of the present application may be a square shell battery cell or a cylindrical battery cell.

[0077] The transport container 200 of the embodiment of the present application is achieved by covering at least a portion of the main body 1 with a wear-resistant layer 2, and the material of either the main body 1 or the wear-resistant layer 2 is plastic or a composite material with plastic as a matrix, and the wear resistance of the wear-resistant layer 2 is greater than the wear resistance of the main body 1. In this way, compared with the main body 1 directly contacting the end cover 600 or the shell 500, the use of the wear-resistant layer 2 in contact with the end cover 600 or the shell 500 can reduce impurities such as organic matter generated by scratches, reduce the generation of welding defects, and improve the yield rate of battery cell welding.

[0078] In some embodiments, the material of the main body 1 includes one of acrylonitrile butadiene styrene copolymer (ABS), polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS) or polyamide (PA), and the material of the wear-resistant layer 2 includes thermoplastic polyurethane (TPU) or polyurethane (PU).

[0079] The material of the main body 1 and the material of the wear-resistant layer 2 are both set to plastic, which is easy to process and has low cost. In addition, thermoplastic polyurethane and polyurethane as the wear-resistant layer 2 have good wear resistance, further reducing organic matter and other impurities generated by scratching the end cover 600 or the shell 500, and improving the yield rate of battery cell welding.

[0080] Figure 4 for Figure 2 The enlarged view at A, Figure 5 Another schematic diagram of the structure of a transport container provided in some embodiments of the present application, which is used to accommodate an end cap, Figure 6 for Figure 5 Enlarged view at B.

[0081] See also Figure 4-Figure 6 In some embodiments, at least one side wall 4 of the accommodating groove 3 includes a wall body 41 and a protrusion 42. The protrusion 42 is arranged on the side of the wall body 41 facing the accommodating groove 3 and is used to limit the area to be welded of the shell 500 or the area to be welded of the end cover 600.

[0082] The protrusion 42 of the embodiment of the present application is used to limit the area to be welded of the shell 500 or the area to be welded of the end cover 600, which does not mean that the protrusion 42 must be against the end cover 600 or the shell 500. During use, it can be against the end cover 600 or the shell 500, or there can be a gap.

[0083] The protrusion 42 of the embodiment of the present application can extend from the opening of the accommodating groove 3 to the bottom wall 5 of the accommodating groove 3, or can extend in the horizontal direction. However, no matter how it is extended, it is necessary to limit the area to be welded of the end cover 600 or the area to be welded of the shell 500. Among them, the area to be welded of the end cover 600 refers to the entire outer edge of the end cover 600. As shown in the figure, the end cover 600 has four first side edges 601, and the four first side edges 601 are all areas to be welded. The area to be welded of the shell 500 refers to the four second side edges 501 of the shell 500 surrounding the opening. The protrusion 42 limits the first side edge 601 or the second side edge 501.

[0084] By providing a protrusion 42 and utilizing the protrusion 42 on the wall body 41 to limit the area to be welded of the shell 500 or the area to be welded of the end cover 600, the contact area when the wall body 41 directly limits the end cover 600 or the shell 500 can be reduced, thereby further reducing impurities such as organic matter generated by scratches and improving the yield rate of battery cell welding.

[0085] In some embodiments, the protrusion 42 is a convex strip structure, and the convex strip structure extends from the opening of the accommodating groove 3 to the bottom wall 5 of the accommodating groove 3 .

[0086] The convex strip structure of the embodiment of the present application can extend in the vertical direction, or can be arranged obliquely relative to the vertical direction to extend toward the bottom wall 5 of the receiving groove 3. The convex strip structure of the embodiment of the present application can extend from the opening of the receiving groove 3 to the bottom wall 5 of the receiving groove 3, or can not extend to the bottom wall 5.

[0087] The convex strip structure of the embodiment of the present application extends from the opening of the accommodating groove 3 to the bottom wall 5 of the accommodating groove 3, wherein the opening of the accommodating groove 3 refers to the end portion of the opening surrounded by the wall body 41 of the accommodating groove 3, so the top end of the convex strip structure can be flush with the top surface of the wall body 41, or slightly lower than the top surface of the wall body 41.

[0088] The protrusion 42 is set to extend from the opening of the accommodating groove 3 to the bottom wall 5 of the accommodating groove 3, so that the end cover 600 or the shell 500 can be aligned and enter when the end cover 600 or the shell 500 enters the accommodating groove 3, further reducing the possible scratches between the protrusion 42 and the end cover 600 or the shell 500, thereby improving the yield rate of battery cell welding.

[0089] Please continue reading Figure 5 and Figure 6 In some embodiments, the receiving groove 3 is used to receive the end cover 600 , and each side wall 4 of the receiving groove 3 is provided with a convex strip structure.

[0090] The shapes of the convex strip structures provided on the side walls 4 of the embodiment of the present application may be the same or different, and the numbers of the convex strip structures provided on the side walls 4 may be the same or different.

[0091] The shape of the convex strip structure in the embodiment of the present application can be a rectangular parallelepiped or a triangular prism, wherein the triangular surface of the triangular prism faces the end cover 600 or the shell 500, and the convex strip structure can also be other shapes.

[0092] Since the entire outer edge of the end cover 600 is the area to be welded, each side wall 4 of the accommodating groove 3 is provided with a convex strip structure to further reduce impurities such as organic matter generated by the friction between the transfer container 200 and the end cover 600, thereby improving the yield rate of battery cell welding.

[0093] Optionally, the width of the convex strip structure is 14 mm-16 mm, wherein the width direction of the convex strip structure is perpendicular to the depth direction of the receiving groove 3 .

[0094] Optionally, the protrusion height of the convex strip structure relative to the wall body is 1mm-2mm.

[0095] Please continue reading Figure 2 and Figure 4 In some embodiments, the receiving groove 3 is used to receive the shell 500, the shell 500 has an opening, and the side wall 4 of the receiving groove 3 for the opening is provided with a convex strip structure.

[0096] Optionally, the side wall 4 of the receiving groove 3 facing the opening of the shell 500 is provided with two protrusions 42 arranged side by side.

[0097] Such an arrangement can reduce the processing difficulty and reduce the cost.

[0098] In some embodiments, the convex strip structure includes an inclined portion 421, which extends from the opening of the accommodating groove 3 to the bottom wall 5 of the accommodating groove 3, and along the first direction X, the protruding height of the inclined portion 421 relative to the wall body 41 gradually increases, wherein the first direction X is the direction from the opening of the accommodating groove 3 to the bottom wall 5 of the accommodating groove 3.

[0099] The inclined portion 421 of the embodiment of the present application may extend from the opening of the receiving groove 3 to the bottom wall 5 of the receiving groove 3 , or may not extend to the bottom wall 5 .

[0100] The surface of the inclined portion 421 facing the end cover 600 or the housing 500 in the embodiment of the present application may be an inclined plane or a curved surface, so that the protruding height of the inclined portion 421 relative to the wall body 41 along the first direction X gradually increases.

[0101] With such a configuration, the inclined portion 421 can not only play a guiding role when the shell 500 or the end cover 600 enters, but also further reduce impurities such as organic matter generated by scratching the shell 500 or the end cover 600, further improving the welding yield of the battery cell.

[0102] Figure 7 A schematic diagram of the structure of the protrusion in the side wall of the transfer container provided in some embodiments of the present application.

[0103] See also Figure 4 and Figure 7 In some embodiments, the convex strip structure further includes a limiting portion 422, the inclined portion 421 and the limiting portion 422 are arranged in sequence and connected along the first direction X, and any protruding height h1 of the limiting portion 422 relative to the wall body 41 is the same as the maximum protruding height h2 of the inclined portion 421 relative to the wall body 41.

[0104] The surface of the limiting portion 422 facing the housing 500 or the end cover 600 of the present embodiment is a plane, and the protrusion height relative to the wall body 41 is the same at all places of the plane. The maximum protrusion height of the inclined portion 421 relative to the wall body 41 is the protrusion height of the area where the inclined portion 421 and the limiting portion 422 are connected.

[0105] like Figure 7 As shown, the inclined portion 421 is located above the limiting portion 422 .

[0106] Such an arrangement can enhance the limiting effect of the protrusion 42 on the housing 500 or the end cover 600 .

[0107] Optionally, the surface of the inclined portion 421 facing the housing 500 is an inclined plane, and its inclination angle is 3°-4°.

[0108] Optionally, a dimension of the limiting portion 422 along the first direction X is 10 mm-12 mm.

[0109] Optionally, the width of the convex strip structure is 20 mm-22 mm.

[0110] Optionally, the protruding height of the limiting portion 422 relative to the wall body 41 is 2 mm-3 mm.

[0111] See also Figure 4 and Figure 6 In some embodiments, the end portion where at least one side wall 4 of the accommodating groove 3 is connected to the adjacent side wall 4 is recessed in a direction away from the accommodating groove 3 to form an escape space, and the escape space is used to avoid the corner of the end cover 600 or the corner of the shell 500.

[0112] The end portion of at least one side wall 4 of the receiving groove 3 in the embodiment of the present application that is connected to the adjacent side wall 4 is recessed in a direction away from the receiving groove 3 , and the space formed by the recess may be a rectangular space or a special-shaped space.

[0113] Exemplarily, two ends of two adjacent side walls 4 connected to each other may be recessed in a direction away from the receiving groove 3 to form an escape space.

[0114] Such an arrangement can reduce the scratching at the corners between the transfer container 200 and the end cover 600 or the corners of the shell 500, and reduce the generation of impurities such as organic matter.

[0115] In some embodiments, the end portion of at least one side wall 4 of the accommodating groove 3 connected to the adjacent side wall 4 is bent in a direction away from the accommodating groove 3 to form an arc segment 43 , and the arc segment 43 constitutes an avoidance space.

[0116] The arc segment 43 is provided, which is relatively smooth and convenient for cleaning after use, thereby reducing the residual impurities.

[0117] Optionally, the accommodating groove 3 is used to accommodate the shell 500, and the radius of the arc segment 43 is 5 mm-6 mm.

[0118] Optionally, the receiving groove 3 is used to receive the end cover 600 , and the radius of the arc segment 43 is 4 mm-5 mm.

[0119] In some embodiments, at least one side wall 4 of any two adjacent side walls 4 of the accommodating groove 3 forms an escape space.

[0120] Such a configuration can further reduce the interference between the transfer container 200 and the corners of the end cap 600 or the corners of the shell 500, reduce the generation of impurities such as organic matter, and also facilitate the subsequent removal of the end cap 600 or the shell 500.

[0121] In some embodiments, the accommodating groove 3 is used to accommodate the shell 500, the shell 500 has an opening, and the bottom wall 5 of the accommodating groove 3 is used to be recessed at one end facing the opening to form an avoidance groove 6, and the avoidance groove 6 is used to avoid the bottom edge of the opening surrounded by the shell 500.

[0122] The bottom edge of the opening of the shell 500 in the embodiment of the present application refers to the edge of the opening of the shell 500 that the bottom wall 5 of the accommodating groove 3 faces.

[0123] The two ends of the avoidance groove 6 in the embodiment of the present application may extend to the two opposite side walls 4 respectively, or may not extend to the two opposite side walls 4 .

[0124] The avoidance groove 6 is provided to accommodate the bottom edge of the opening surrounded by the shell 500, thereby reducing organic matter generated by the scraping between the bottom edge of the shell 500 and the bottom wall 5, and improving the welding yield of the battery cell.

[0125] Optionally, the depth of the avoidance groove 6 is 1 mm-2 mm.

[0126] Optionally, the width of the avoidance groove 6 is 9 mm-11 mm, and the width direction of the avoidance groove 6 is perpendicular to its extension direction.

[0127] In some embodiments, the wear-resistant layer 2 is wrapped around the main body 1 .

[0128] For example, during the manufacturing process, the wear-resistant layer 2 wraps the main body 1 to form a sheet, which is then formed by vacuum forming using a mold to form a vacuum forming container.

[0129] Such an arrangement not only improves the wear resistance of the transfer container 200, but also makes it difficult for the wear-resistant layer 2 and the main body 1 to separate, thereby improving the reliability of the use of the transfer container 200.

[0130] See also Figure 2-Figure 6The embodiment of the present application provides a transport container 200 for transporting the end cap 600 or the shell 500 of the battery cell. The transport container 200 includes a body 1 and a wear-resistant layer 2. The body 1 is used to support the end cap 600 or the shell 500. The wear-resistant layer 2 is wrapped around the body 1 and together forms a plurality of receiving grooves 3. The receiving grooves 3 are used to receive the end cap 600 or the shell 500. The wear-resistant layer 2 is used to contact the end cap 600 or the shell 500. The material of any one of the body 1 and the wear-resistant layer 2 is plastic or a composite material with plastic as a matrix. The wear resistance of the wear-resistant layer 2 is greater than that of the body 1. At least one side wall 4 of the receiving groove 3 includes a wall body 41 and a protrusion 42. The protrusion 42 is arranged on the side of the wall body 41 facing the receiving groove 3 and is used to limit the area to be welded of the shell 500 or the area to be welded of the end cap 600. The protrusion 42 is a convex strip structure, which extends from the opening of the receiving groove 3 to the bottom wall 5 of the receiving groove 3. The end of at least one side wall 4 of the receiving groove 3 connected to the adjacent side wall 4 is bent away from the receiving groove 3 to form an arc segment 43, and the arc segment 43 forms an escape space. At least one side wall 4 of any two adjacent side walls 4 of the receiving groove 3 forms an escape space.

[0131] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A transport container for transporting end caps or shells of battery cells, characterized in that: include: A main body portion, used to support the end cover or the housing; a wear-resistant layer, the wear-resistant layer covers at least a portion of the main body and together forms a plurality of receiving grooves, the receiving grooves are used to receive the end cover or the shell, and the wear-resistant layer is used to contact the end cover or the shell; Wherein, the material of any one of the main body and the wear-resistant layer is plastic or a composite material with plastic as a matrix, and the wear resistance of the wear-resistant layer is greater than the wear resistance of the main body.

2. The transport container according to claim 1, characterized in that: The material of the main body includes one of acrylonitrile-butadiene-styrene copolymer, polyvinyl chloride, polyethylene, polypropylene, polystyrene or polyamide, and the material of the wear-resistant layer includes thermoplastic polyurethane or polyurethane.

3. The transport container according to claim 1, characterized in that: At least one side wall of the receiving groove includes a wall body and a protrusion, wherein the protrusion is arranged on a side of the wall body facing the receiving groove and is used to limit the area to be welded of the shell or the area to be welded of the end cover.

4. The transport container according to claim 3, characterized in that: The protrusion is a convex strip structure, and the convex strip structure extends from the opening of the accommodating groove to the bottom wall of the accommodating groove.

5. The transport container according to claim 4, characterized in that: The receiving groove is used to receive the end cover, and each side wall of the receiving groove is provided with the convex strip structure.

6. The transport container according to claim 4, characterized in that: The receiving groove is used to receive the shell, the shell has an opening, and the side wall of the receiving groove facing the opening is provided with the convex strip structure.

7. The transport container according to claim 4, characterized in that: The convex strip structure includes an inclined portion, which extends from the opening of the receiving groove to the bottom wall of the receiving groove, and along the first direction, the protruding height of the inclined portion relative to the wall body gradually increases, wherein the first direction is the direction from the opening of the receiving groove to the bottom wall of the receiving groove.

8. The transport container according to claim 7, characterized in that: The convex strip structure also includes a limiting portion, the inclined portion and the limiting portion are sequentially arranged and connected along the first direction, and any protruding height of the limiting portion relative to the wall body is the same as the maximum protruding height of the inclined portion relative to the wall body.

9. The transport container according to any one of claims 1 to 8, characterized in that: An end portion of at least one side wall of the accommodating groove connected to an adjacent side wall is recessed in a direction away from the accommodating groove to form an escape space, and the escape space is used to escape a corner of the end cover or a corner of the shell.

10. The transport container according to claim 9, characterized in that: An end portion of at least one side wall of the accommodating groove connected to an adjacent side wall is bent in a direction away from the accommodating groove to form an arc segment, and the arc segment constitutes the avoidance space.

11. The transport container according to claim 9, characterized in that: At least one of any two adjacent side walls of the accommodating groove forms the escape space.

12. The transport container according to claim 1, characterized in that: The receiving groove is used to receive the shell, the shell has an opening, and the bottom wall of the receiving groove is used to be recessed at one end facing the opening to form an avoidance groove, and is used to avoid the bottom edge of the opening surrounded by the shell.

13. The transport container according to any one of claims 1 to 8, characterized in that: The wear-resistant layer is wrapped around the main body.

14. A battery production line, characterized in that: include: The transport container according to any one of claims 1 to 13, wherein the transport container is used to transport the end cap or shell of a square-shell battery cell; The welding mechanism is used to weld the end cover and the shell of the transported square shell battery cell.

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