Clamping assembly and clamping device

Abstract

The utility model discloses a clamping assembly and a clamping device. The clamping assembly is used for clamping an end cover of a single battery before the end cover is welded. The clamping assembly comprises a base and an abutting piece. The abutting piece is connected with the base and used for abutting against the side edge of the end cover. The abutting piece is made of ceramic, so that the hardness of the abutting piece is improved, the abrasion resistance of the abutting piece is improved, the risk that the abutting piece is abraded by the side edge of the end cover is reduced, the risk that the side edge of the end cover is attached to abutting piece chippings in the welding process of the end cover is reduced, and improvement of the welding seam quality is facilitated.

Description

Technical Field

[0001] The present application relates to the field of battery production, and more particularly, to a clamping assembly and a clamping device. Background Art

[0002] End cap welding is an essential process in the battery production process, mainly applied in the production of battery monomers. End cap welding refers to the process of accommodating an electrode assembly in a housing, covering the opening of the housing with an end cap, and then connecting the gap between the edge of the end cap and the opening of the housing by welding.

[0003] During the end cap welding process, in addition to the uniformity of the weld coverage, the quality of the weld is also an issue that needs to be considered. Summary of the Utility Model

[0004] The embodiments of the present application provide a clamping assembly and a clamping device, which are beneficial to improving the quality of the weld during end cap welding.

[0005] In a first aspect, the embodiments of the present application provide a clamping assembly for clamping the end cap of a battery monomer before end cap welding. The clamping assembly includes a base and an abutting member. The abutting member is connected to the base and is used to abut against the side of the end cap. Among them, the abutting member is made of ceramic.

[0006] In the technical solution of the embodiments of the present application, the abutting member is made of ceramic, so that the hardness of the abutting member is increased, thereby improving the wear resistance of the abutting member, reducing the risk of the side of the end cap wearing the abutting member, and reducing the risk of debris of the abutting member adhering to the side of the end cap during end cap welding, which is beneficial to improving the quality of the weld.

[0007] In some embodiments, the abutting member is configured to be in line contact with the end cap.

[0008] In the above technical solution, the abutting member is configured to be in line contact with the end cap, thereby reducing the contact area between the abutting member and the end cap, reducing the risk of the electrode material adhered to the surface of the end cap adhering to the surface of the abutting member, and improving the surface cleanliness of the abutting member, which is beneficial to improving the quality of the weld during end cap welding.

[0009] In some embodiments, the abutting member is cylindrical, and the outer peripheral surface of the abutting member is used to abut against the end cap.

[0010] In the above technical solution, the abutting member is cylindrical. On the one hand, the cylindrical shape facilitates the manufacture and installation of the abutting member; on the other hand, the cylindrical shape of the abutting member enables the abutting member to be in line contact with the end cap, thereby reducing the risk of the electrode material adhered to the surface of the end cap adhering to the surface of the abutting member, and improving the surface cleanliness of the abutting member, which is beneficial to improving the quality of the weld during end cap welding.

[0011] In some embodiments, a plurality of abutting members are provided, and the plurality of abutting members are spaced apart in a first direction perpendicular to the axial direction of the abutting members.

[0012] In the above technical solution, the plurality of abutting members are spaced apart in the first direction, so that each of the plurality of abutting members can abut against the end cover, making the force on the end cover more uniform, which is beneficial to improving the stability of the structural limit generated on the end cover when the clamping assembly abuts against the end cover.

[0013] In some embodiments, the base has a first groove, and at least a part of the abutting member is received in the first groove. Two opposite side walls of the first groove are respectively connected to two ends of the abutting member.

[0014] In the above technical solution, at least a part of the abutting member is received in the first groove to reduce the volume occupied by the abutting member and the base, thereby reducing the space occupied by the clamping assembly in the clamping device.

[0015] In some embodiments, the base includes a first body and a second body, and the first body and the second body are detachably connected. Two ends of the abutting member are respectively connected to the first body and the second body.

[0016] In the above technical solution, the base is a split structure including a first body and a second body, which reduces the manufacturing difficulty of the base. At the same time, the first body and the second body are detachably connected, facilitating the replacement of the abutting member when the abutting member is damaged.

[0017] In some embodiments, the first body is provided with a first mounting hole, the second body is provided with a second mounting hole, and two ends of the abutting member are respectively inserted into the first mounting hole and the second mounting hole.

[0018] In the above technical solution, two ends of the abutting member are respectively inserted into the first mounting hole and the second mounting hole, which can limit the movement of the abutting member relative to the first body and the second body in the radial direction of the abutting member, which is beneficial to improving the stability of the structural limit generated on the end cover when the clamping assembly abuts against the end cover.

[0019] In a second aspect, an embodiment of the present application provides a clamping device including at least a pair of clamping assemblies provided in any one of the first aspect embodiments. Each pair of clamping assemblies includes two spaced apart in a second direction perpendicular to the axial direction of the abutting member, and the two clamping assemblies in each pair of clamping assemblies are used to abut against two opposite sides of the end cover.

[0020] In the above technical solution, since the clamping device has the clamping assembly in the first aspect embodiment, the clamping device also has the beneficial effects in the first aspect embodiment. Specifically, the abutting member in the clamping assembly of the clamping device is made of ceramic, so as to improve the hardness of the abutting member, thereby improving the wear resistance of the abutting member, reducing the risk of the side edge of the end cover wearing the abutting member, and reducing the risk of debris of the abutting member adhering to the side edge of the end cover during the welding process of the end cover, which is beneficial to improving the weld quality.

[0021] In some embodiments, the clamping device further includes a mounting table and at least one pair of driving components. The clamping assembly is movably disposed on the mounting table in a second direction. The two driving components in each pair of driving components are configured to respectively drive the two clamping components in each pair of clamping assemblies to approach or separate from each other in the second direction.

[0022] In the above technical solution, at least one pair of driving components drives at least one pair of clamping assemblies to clamp the two side edges of the end cover in the second direction. So that the clamping device can limit the movement of the end cover relative to the mounting table before the end cover welding process.

[0023] In some embodiments, the clamping device further includes a guide rail disposed on the mounting table. A second groove is provided on the base of the clamping assembly, and a part of the guide rail is received in the second groove for guiding the clamping assembly to move in the second direction.

[0024] In the above technical solution, a part of the guide rail is received in the second groove for guiding the clamping assembly to move in the second direction, reducing the risk that the driving component deviates from the second direction and fails to effectively drive the base to move in the second direction, and improving the stability of the structural limit of the clamping assembly to the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Schematic structural diagram of a clamping assembly provided by some embodiments of the present application;

[0027] Figure 2 Schematic structural diagram of a clamping assembly and an end cover provided by some embodiments of the present application;

[0028] Figure 3 For Figure 2 Cross-sectional view taken along A-A in

[0029] Figure 4 Another cross-sectional view of a clamping assembly and an end cap provided by some embodiments of the present application;

[0030] Figure 5 Another cross-sectional view of a clamping assembly and an end cap provided by some embodiments of the present application;

[0031] Figure 6 Exploded perspective view of the clamping assembly provided by some embodiments of the present application;

[0032] Figure 7 Schematic structural diagram of a clamping device provided by some embodiments of the present application;

[0033] Figure 8 Schematic structural diagram of another clamping device provided by some embodiments of the present application.

[0034] Icon: 1000 - clamping device;

[0035] 100 - clamping assembly; 10 - base; 10A - third side; 10B - first groove; 10C - second groove; 11 - first body; 11A - first mounting hole; 11B - fourth side; 111 - first part; 112 - second part; 12 - second body; 12A - second mounting hole;

[0036] 20 - abutting member; 20A - first side; 20B - second side; 20C - outer peripheral surface;

[0037] 200 - end cap;

[0038] 300 - mounting table;

[0039] 400 - guide rail;

[0040] X - first direction; Y - second direction; Z - axial direction of the abutting member. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application fall within the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; 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" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of this application are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0043] Reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase may not necessarily refer to the same embodiment when it appears in various positions in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled", "attached" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0046] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings of the embodiments of this application, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0047] The term "plurality" as used in this application means two or more (including two).

[0048] A clamping device is a device used to restrict and clamp a workpiece, and is usually used in processes such as machining, assembly, and welding. The function of the clamping device is to ensure that the workpiece or tool maintains a stable position and posture during the processing to ensure the machining accuracy and safety.

[0049] The clamping assembly is a component in the clamping device that abuts against the workpiece to restrict and clamp the workpiece.

[0050] The battery cell may include a housing and an electrode assembly.

[0051] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0052] The housing includes a shell and an end cap. The shell is used to define a sealed space for accommodating the electrode assembly, electrolyte, and other components. The shell has an opening, and the end cap is used to seal the opening.

[0053] End cap welding refers to, after the electrode assembly is accommodated in the shell and the opening of the shell is sealed by the end cap, filling the gap between the edge of the end cap and the opening of the shell by welding. The quality of the weld formed by welding has an important impact on the sealing performance of the battery cell.

[0054] During end cap welding, the cleanliness of the side of the end cap used for welding directly affects the quality of the weld. If there are impurities on the side of the end cap, it will affect the heat conduction and metal flow in the welding area, resulting in a decrease in the quality of the weld and even causing welding defects. At the same time, poor cleanliness of the side of the end cap will lead to a reduction in the strength of the weld, and defects such as pores and cracks are likely to occur in the weld, affecting the mechanical properties and corrosion resistance of the welded joint.

[0055] Therefore, it is very important to maintain the cleanliness of the side of the end cap during end cap welding.

[0056] Currently, in the prior process before end cap welding, generally, the end cap is restricted and clamped on one side of the shell by the clamping assembly. After the electrode assembly is placed in the shell through the opening of the shell, the end cap is then sealed to the above-mentioned opening by hand-held or driven by a robotic arm. And the gap between the side of the end cap and the opening is welded.

[0057] In the prior art, the part of the clamping assembly that abuts against the side of the end cap is generally made of a thermoplastic material (such as polyoxymethylene). When the end cap moves relative to this part, it is easy to cause wear on the surface of this part, thereby generating debris, which increases the risk of the debris adhering to the side of the end cap.

[0058] In view of this, in order to reduce the risk of the above-mentioned debris adhering to the side of the end cap, the present application provides a clamping assembly. The abutting member in the clamping assembly that abuts against the side of the end cap is made of ceramic, so as to improve the hardness of the abutting member, thereby improving the wear resistance of the abutting member, reducing the risk of the side of the end cap wearing the abutting member, reducing the risk of debris of the abutting member adhering to the side of the end cap during the welding process of the end cap, and further reducing the risk of the weld quality being reduced due to the debris of the abutting member.

[0059] The specific structure of the clamping assembly will be elaborated in detail below with reference to the accompanying drawings.

[0060] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of the clamping assembly 100 provided by some embodiments of the present application. Figure 2 which is a schematic structural diagram of the clamping assembly 100 and the end cap 200 provided by some embodiments of the present application. The present application provides a clamping assembly 100 for clamping the end cap 200 of the battery cell before welding the end cap 200. The clamping assembly 100 includes a base 10 and an abutting member 20. The abutting member 20 is connected to the base 10 and is used to abut against the side of the end cap 200. Among them, the abutting member 20 is made of ceramic.

[0061] The base 10 is a component in the clamping assembly 100 for connecting other components in the clamping device (not shown in the figure) and the abutting member 20.

[0062] It can be understood that the base 10 can move relative to other components in the clamping device (not shown in the figure) to drive the abutting member 20 to abut against the side of the end cap 200.

[0063] Optionally, the base 10 can be made of a material with a certain hardness and strength (such as aluminum alloy), which can reduce the risk of deformation when the base 10 bears the reaction force provided by the abutting member 20, which is beneficial to improving the stability of the structural limit of the clamping assembly 100 on the end cap 200 when abutting against the end cap 200.

[0064] The abutting member 20 is a component in the clamping assembly 100 for abutting against the side of the end cap 200.

[0065] The side of the end cap 200 refers to the side of the end cap 200 parallel to the thickness direction of the end cap 200.

[0066] In some embodiments, the side of the end cap 200 refers to the side of the end cap 200 that is parallel to the thickness direction of the end cap 200 and perpendicular to the length direction of the end cap 200.

[0067] Among them, the first direction X can be parallel to the width direction of the end cover 200, the second direction Y can be parallel to the length direction of the end cover 200, and the extending direction of the abutting member 20 can be parallel to the thickness direction of the end cover 200. The first direction X, the second direction Y, and the extending direction of the abutting member 20 are perpendicular to each other in pairs.

[0068] It can be understood that in the embodiment where the abutting member 20 is cylindrical, the axial direction Z of the abutting member 20 is the extending direction of the abutting member 20.

[0069] "The abutting member 20 is made of ceramic" can be understood as that the whole of the abutting member 20 is made of ceramic material, or it can also be understood that the part of the abutting member 20 for abutting against the side of the end cover 200 has a wear-resistant layer made of ceramic material.

[0070] Ceramics are a kind of widely used inorganic non-metallic materials, usually composed of metal oxides, nitrides, carbides, etc.

[0071] Exemplarily, the ceramic material can be nano-ceramic material, tungsten carbide alloy material, polymer ceramic polymer material, etc.

[0072] In the above solution, the abutting member 20 is made of ceramic, so that the hardness of the abutting member 20 is improved, thereby improving the wear resistance of the abutting member 20, reducing the risk of the side of the end cover 200 wearing the abutting member 20, reducing the risk of debris of the abutting member 20 adhering to the side of the end cover 200 during the welding process of the end cover 200, and further reducing the risk of the weld quality being reduced due to the debris of the abutting member 20. This is beneficial to improving the weld quality.

[0073] According to some embodiments of the present application, referring to Figure 2 , and further referring to Figure 3 , Figure 4 and Figure 5 , Figure 3 is Figure 2 the sectional view taken along A-A in Figure 4 is the sectional view of another clamping assembly 100 and the end cover 200 provided by some embodiments of the present application, Figure 5 is the sectional view of yet another clamping assembly 100 and the end cover 200 provided by some embodiments of the present application. The abutting member 20 is configured to be in line contact with the end cover 200.

[0074] Line contact means that the contact surface between two objects is linear.

[0075] In some embodiments, referring to Figure 4 , the abutting member 20 has two first side surfaces 20A that form an angle with each other, and the junction of the two first side surfaces 20A is used to abut against the side of the end cover 200.

[0076] In some embodiments, reference Figure 5 The abutment member 20 has a second side surface 20B facing the end cover 200 along the second direction Y. The second side surface 20B is a curved surface, and the center of curvature of the second side surface 20B is located on the side of the second side surface 20B away from the end cover 200. The second side surface 20B is in line contact with the end cover 200.

[0077] In the above scheme, the abutment 20 is configured to be in line contact with the end cover 200, thereby reducing the contact area between the abutment 20 and the end cover 200, thereby reducing the risk of the pole piece material adhered to the surface of the end cover 200 adhering to the surface of the abutment 20, thereby improving the surface cleanliness of the abutment 20, which is beneficial to improving the quality of the weld during the welding process of the end cover 200.

[0078] According to some embodiments of the present application, referring to Figure 2 , and please refer to Figure 3 and Figure 6 , Figure 6 The three-dimensional exploded view of the clamping assembly 100 provided in some embodiments of the present application. The abutment member 20 is cylindrical, and the outer peripheral surface 20C of the abutment member 20 is used to abut against the end cover 200.

[0079] The geometric shape of cylindrical objects is relatively simple and can usually be processed by turning and grinding. In addition, cylindrical objects have a stable structure and are easy to fix and clamp, which is conducive to stability and precision control during processing. At the same time, since the geometric shape of cylindrical objects is relatively regular, automated equipment can be used for batch production during processing to improve production efficiency.

[0080] The outer peripheral surface 20C of the contact member 20 refers to a surface of the contact member 20 that connects both end surfaces of the contact member 20 .

[0081] In the above scheme, the abutment 20 is cylindrical. On the one hand, the cylindrical shape facilitates the manufacture and installation of the abutment 20; on the other hand, it enables the abutment 20 to be in line contact with the end cover 200, thereby reducing the risk of the pole piece material adhered to the surface of the end cover 200 adhering to the surface of the abutment 20, thereby improving the surface cleanliness of the abutment 20, which is beneficial to improving the quality of the weld during the welding process of the end cover 200.

[0082] According to some embodiments of the present application, referring to Figure 2 , and please refer to Figure 3 and Figure 6 A plurality of abutting members 20 are provided, and the plurality of abutting members 20 are arranged at intervals along the first direction X.

[0083] In some embodiments, there are two abutting members 20 , which are spaced apart along the first direction X and are respectively used to abut against the same side of the end cover 200 .

[0084] Wherein, the first direction X can be parallel to the width direction of the end cover 200, the second direction Y can be parallel to the length direction of the end cover 200, and the axial direction Z of the abutting member 20 (i.e., the extending direction of the abutting member 20) can be parallel to the thickness direction of the end cover 200. The first direction X, the second direction Y, and the axial direction Z of the abutting member 20 are perpendicular to each other pairwise.

[0085] In the above solution, a plurality of abutting members 20 are arranged at intervals along the first direction X, so that all the plurality of abutting members 20 can abut against the end cover 200, making the force on the end cover 200 more uniform, which is beneficial to improving the stability of the structural limit generated on the end cover 200 when the clamping assembly 100 abuts against the end cover 200.

[0086] According to some embodiments of the present application, with reference to Figure 2 and further with reference to Figure 3 and Figure 6 the base 10 has a first groove 10B, and at least a part of the abutting member 20 is received in the first groove 10B. Both ends of the abutting member 20 are connected to two opposite side walls of the first groove 10B respectively.

[0087] The first groove 10B is the part of the base 10 for receiving at least a part of the abutting member 20.

[0088] Exemplarily, the side surface of the base 10 facing the end cover 200 is recessed along the second direction Y to form the first groove 10B.

[0089] The abutting member 20 can be non-detachably connected to two opposite side walls of the first groove 10B, or the abutting member 20 can be detachably connected to two opposite side walls of the first groove 10B.

[0090] In the embodiment where the abutting member 20 is non-detachably connected to two opposite side walls of the first groove 10B, the abutting member 20 can be adhesively bonded to two opposite side walls of the first groove 10B.

[0091] In some embodiments, along the second direction Y, the base 10 has a third side surface 10A, and the third side surface 10A is recessed along the second direction Y to form the first groove 10B. The first groove 10B extends along the first direction X. Along the axial direction Z of the abutting member 20, the first groove 10B has opposite side walls, and both ends of the abutting member 20 are detachably connected to two opposite side walls of the first groove 10B respectively. Along the second direction Y, a part of the outer peripheral surface 20C of the abutting member 20 protrudes from the third side surface 10A.

[0092] In the above solution, at least a part of the abutting member 20 is received in the first groove 10B to reduce the volume occupied by the abutting member 20 and the base 10 in the second direction Y, thereby reducing the space occupied by the clamping assembly 100 in the clamping device (not shown in the figure).

[0093] According to some embodiments of the present application, referring to Figure 6 , the base 10 includes a first body 11 and a second body 12, and the first body 11 and the second body 12 are detachably connected. Both ends of the abutting member 20 are respectively connected to the first body 11 and the second body 12.

[0094] The first body 11 and the second body 12 are the main body parts of the base 10.

[0095] It can be understood that the first body 11 and the second body 12 are generally metal parts to have higher strength and stiffness, so as to reduce the risk of deformation of the base 10 when the reaction force of the abutting member 20 is large.

[0096] Exemplarily, the first body 11 and the second body 12 can be connected by screws, or the first body 11 and the second body 12 can be connected by snap-fits.

[0097] In some embodiments, the first body 11 has a first part 111 and a second part 112. In the second direction Y, the first part 111 has a fourth side surface 11B, the second part 112 protrudes from the fourth side surface 11B, and the thickness direction of the second part 112 is parallel to the second direction Y. The second body 12 is connected to one end of the second part 112 away from the first part 111 by screws. The first part 111, the second part 112 and the second body 12 enclose to form the first groove 10B, and both ends of the abutting member 20 are respectively connected to the first part 111 and the second body 12.

[0098] In the above solution, the base 10 is a split structure including the first body 11 and the second body 12, which reduces the manufacturing difficulty of the base 10. At the same time, the first body 11 and the second body 12 are detachably connected, so as to facilitate the replacement of the abutting member 20 when the abutting member 20 is damaged.

[0099] According to some embodiments of the present application, referring to Figure 6 , the first body 11 is provided with a first mounting hole 11A, the second body 12 is provided with a second mounting hole 12A, and both ends of the abutting member 20 are respectively inserted into the first mounting hole 11A and the second mounting hole 12A.

[0100] The first mounting hole 11A is a blind hole on the first body 11 for receiving one end of the abutting member 20.

[0101] The second mounting hole 12A is a blind hole on the second body 12 for receiving the other end of the abutting member 20.

[0102] In some embodiments, the first mounting hole 11A is located on the fourth side surface 11B of the first part 111, and the second body 12 has a fifth side surface (not shown in the figure) facing the first part 111. The second mounting hole 12A is located on the fifth side surface. Both the first mounting hole 11A and the second mounting hole 12A have notches. A part of the outer peripheral surface 20C of the abutting member 20 protrudes from the third side surface 10A through the notch. In this way, the abutting member 20 is detachably connected to the base 10 in the above manner, so as to facilitate the replacement of the abutting member 20 when the abutting member 20 is damaged.

[0103] In the above solution, both ends of the abutting member 20 are respectively inserted into the first mounting hole 11A and the second mounting hole 12A to limit the movement of the abutting member 20 relative to the first body 11 and the second body 12 along the radial direction of the abutting member 20, which is beneficial to improving the stability of the structural limit generated on the end cover 200 when the clamping assembly 100 abuts against the end cover 200.

[0104] Refer to Figure 7 , Figure 7 FIG.

[0105] is a schematic structural diagram of a clamping device 1000 provided in some embodiments of the present application. An embodiment of the present application provides a clamping device 1000, which includes at least a pair of clamping assemblies 100 provided in any one of the above embodiments. Each pair of clamping assemblies 100 are two arranged at intervals along the second direction Y. The two clamping assemblies 100 in each pair of clamping assemblies 100 are used to abut against opposite two side edges of the end cover 200, and the second direction Y is perpendicular to the axial direction Z of the abutting member 20.

[0106] According to the clamping device 1000 in the embodiments of the present application, since it has the clamping assembly 100 provided in any one of the above embodiments, therefore, the clamping device 1000 also has the beneficial effects of the clamping assembly 100 provided in any one of the above embodiments. Specifically, the abutting member 20 in the clamping assembly 100 of the clamping device 1000 is made of ceramic, so as to improve the hardness of the abutting member 20, thereby improving the wear resistance of the abutting member 20, thereby reducing the risk of the side edge of the end cover 200 wearing the abutting member 20, and thereby reducing the risk of debris of the abutting member 20 adhering to the side edge of the end cover 200 during the welding process of the end cover 200, which is beneficial to improving the weld quality.

[0107] According to some embodiments of the present application, refer to Figure 7 , and please further refer to Figure 8 , Figure 8Schematic structural diagram of another clamping device 1000 provided for some embodiments of the present application. The clamping device 1000 further includes a mounting table 300 and at least a pair of driving components (not shown in the figure). The clamping assembly 100 is movably arranged on the mounting table 300 along the second direction Y. Two driving components (not shown in the figure) in each pair of driving components (not shown in the figure) are configured to respectively drive two clamping assemblies 100 in each pair of clamping assemblies 100 to approach or move away from each other along the second direction Y.

[0108] The mounting table 300 is a component in the clamping device 1000 for carrying the clamping assembly 100 and the driving components.

[0109] It can be understood that the mounting table 300 can also be a mounting cabinet or a mounting rack, and the embodiments of the present application are not limited thereto.

[0110] Optionally, the driving component (not shown in the figure) can be a hydraulic cylinder, a pneumatic cylinder, a motor, etc.

[0111] In some embodiments, the clamping device 1000 includes a pair of clamping assemblies 100 and a pair of driving components (not shown in the figure). Two driving components (not shown in the figure) in each pair of driving components (not shown in the figure) are configured to respectively drive two clamping assemblies 100 in each pair of clamping assemblies 100 to approach or move away from each other along the second direction Y. To clamp and unclamp the end cover 200. By driving the clamping assembly 100 to move along the second direction Y by the driving component, the movement of the clamping assembly 100 along the second direction Y can be made more stable.

[0112] In the above solution, at least a pair of driving components drive at least a pair of clamping assemblies 100 to clamp the two sides of the end cover 200 in the second direction Y. So that the clamping device 1000 can limit the movement of the end cover 200 relative to the mounting table 300 before the welding process of the end cover 200.

[0113] According to some embodiments of the present application, refer to Figure 7 , and please further refer to Figure 8 , the clamping device 1000 further includes a guide rail 400, which is arranged on the mounting table 300. A second groove 10C is provided on the base 10 of the clamping assembly 100, and a part of the guide rail 400 is accommodated in the second groove 10C for guiding the clamping assembly 100 to move along the second direction Y.

[0114] The second groove 10C is a part on the base 10 for adapting to the guide rail 400.

[0115] Exemplarily, the side of the base 10 facing the mounting table 300 is recessed in a direction away from the mounting table 300 to form a second groove 10C, and the second groove 10C extends along the second direction Y. A part of the guide rail 400 is received in the second groove 10C for guiding the clamping assembly 100 to move along the second direction Y.

[0116] In the above solution, a part of the guide rail 400 is received in the second groove 10C for guiding the clamping assembly 100 to move along the second direction Y, reducing the risk that the driving component deviates from the second direction Y and fails to effectively drive the base 10 to move along the second direction Y, and improving the stability of the structural limit of the clamping assembly 100 on the end cover 200.

[0117] Please refer to Figures 1 - 3 and further refer to Figures 6 - 8 . An embodiment of the present application provides a clamping device 1000 including a pair of clamping assemblies 100, a pair of driving components (not shown in the figure), a mounting table 300, and a guide rail 400.

[0118] Wherein, each pair of clamping assemblies 100 includes two clamping assemblies 100 spaced apart along the second direction Y.

[0119] The clamping assembly 100 includes a base 10 and an abutting member 20.

[0120] Wherein, the abutting member 20 is made of ceramic and is cylindrical.

[0121] Along the second direction Y, the base 10 has a third side surface 10A, and the third side surface 10A is recessed along the second direction Y to form a first groove 10B. The first groove 10B extends along the first direction X.

[0122] The base 10 includes a first body 11 and a second body 12. The first body 11 has a first part 111 and a second part 112. In the second direction Y, the first part 111 has a fourth side surface 11B, and the second part 112 protrudes from the fourth side surface 11B. The thickness direction of the second part 112 is parallel to the second direction Y. The second body 12 is connected to one end of the second part 112 away from the first part 111 by screws. The first part 111, the second part 112, and the second body 12 enclose to form the first groove 10B.

[0123] The fourth side surface 11B has a first mounting hole 11A, and the second body 12 has a fifth side surface (not shown in the figure) facing the first part 111. Both ends of the abutting member 20 are respectively inserted into the first mounting hole 11A and the second mounting hole 12A. Both the first mounting hole 11A and the second mounting hole 12A have notches. A part of the outer peripheral surface 20C of the abutting member 20 protrudes from the third side surface 10A through the notch.

[0124] The guide rail 400 is arranged on the mounting table 300. The side surface of the base 10 facing the mounting table 300 is recessed in a direction away from the mounting table 300 to form a second groove 10C, and the second groove 10C extends along the second direction Y. A part of the guide rail 400 is received in the second groove 10C for guiding the clamping assembly 100 to move along the second direction Y.

[0125] Each pair of driving components (not shown in the figure) are two driving components (not shown in the figure), and the two driving components (not shown in the figure) are configured to respectively drive the two clamping components 100 in each pair of clamping components 100 to approach each other along the second direction Y, so that the abutting members 20 of the two clamping components 100 respectively abut against the two side edges of the end cover 200 in the second direction Y to limit the movement of the end cover 200 relative to the mounting table 300; or, the two driving components (not shown in the figure) are configured to respectively drive the two clamping components 100 in each pair of clamping components 100 to move away from each other along the second direction Y, so that the two clamping components 100 release the end cover 200.

[0126] In the above solution, the abutting member 20 in the clamping component 100 of the clamping device 1000 is made of ceramic, so that the hardness of the abutting member 20 is increased, thereby improving the wear resistance of the abutting member 20, thereby reducing the risk of the side edge of the end cover 200 wearing the abutting member 20, thereby reducing the risk of debris of the abutting member 20 adhering to the side edge of the end cover 200 during the welding process of the end cover 200, and further reducing the risk of the weld quality being reduced due to the debris of the abutting member 20. This is beneficial to improving the weld quality.

[0127] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0128] The above embodiments are only used to illustrate the technical solutions of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A clamping assembly for clamping an end cover of a battery cell, characterized in that: include: Pedestal; an abutment member connected to the base and used to abut against a side edge of the end cover; Wherein, the abutment member is made of ceramic; The base has a first groove, and at least a portion of the abutment member is accommodated in the first groove; Two ends of the abutment member are respectively connected to two opposite side walls of the first groove; The base comprises a first body and a second body, wherein the first body and the second body are detachably connected; Two ends of the abutment member are respectively connected to the first body and the second body; The first body is provided with a first mounting hole, the second body is provided with a second mounting hole, and two ends of the abutment member are respectively inserted into the first mounting hole and the second mounting hole.

2. The clamping assembly according to claim 1, characterized in that The abutment is configured to be in line contact with the end cap.

3. The clamping assembly according to claim 2, characterized in that The abutment member is cylindrical, and the outer peripheral surface of the abutment member is used for abutting against the end cover.

4. The clamping assembly according to claim 3, characterized in that A plurality of the abutting members are provided, and the plurality of the abutting members are arranged at intervals along a first direction, and the first direction is perpendicular to the axial direction of the abutting members.

5. A clamping device, characterized in that: comprising at least one pair of clamping assemblies according to any one of claims 1 to 4; Each pair of the clamping assemblies consists of two clamping assemblies spaced apart along a second direction, and the two clamping assemblies in each pair of the clamping assemblies are used to abut against two opposite sides of the end cover, and the second direction is perpendicular to the axial direction of the abutting member.

6. The clamping device according to claim 5, characterized in that The clamping device also includes a mounting platform and at least one pair of driving components; The clamping assembly is movably disposed on the mounting platform along the second direction; The two driving components in each pair of the driving components are configured to respectively drive the two clamping components in each pair of the clamping components to move closer to or farther from each other along the second direction.

7. The clamping device according to claim 6, characterized in that The clamping device also includes a guide rail, which is arranged on the mounting platform; A second groove is provided on the base of the clamping assembly, and a portion of the guide rail is accommodated in the second groove to guide the clamping assembly to move along the second direction.

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