Clamp, press fitting device and battery production line

Abstract

The utility model discloses a clamp, a press fitting device and a battery production line, and belongs to the technical field of battery manufacturing, the clamp is used for clamping a battery monomer, the battery monomer comprises a first end cover and a shell with a first opening, and the first end cover covers the first opening in a first direction. The clamp comprises a supporting assembly, a first limiting piece and a first driving piece. The supporting assembly is used for supporting the shell; in the first direction, a first limiting gap used for containing the shell is formed between the first limiting piece and the supporting assembly, and the first direction is perpendicular to the gravity direction; the first driving piece is configured to drive the first limiting piece to move in the first direction so that the first limiting piece can press the first end cover and the shell tightly after the first end cover seals the first opening. According to the technical scheme provided by the invention, the displacement of the end cover relative to the shell in the transportation process is reduced, so that the welding quality of the end cover and the shell is improved, and the reliability of the battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a clamp, a pressing device and a battery production line. Background Art

[0002] At present, the batteries most commonly used in vehicles are generally lithium-ion batteries. As a rechargeable battery, lithium-ion batteries have the advantages of small size, high energy density, high power density, many cycles and long storage time.

[0003] A battery cell generally includes a shell, an end cover and an electrode assembly. After the pressing device accommodates the electrode assembly in the shell and seals the opening of the shell with the end cover, the end cover may move relative to the shell during transportation to the welding device, resulting in an excessively large gap between the shell and the end cover, thereby reducing the welding quality of the end cover and the shell, thereby reducing the reliability of the battery cell. Utility Model Content

[0004] The embodiments of the present application provide a clamp, a press-fitting device and a battery production line to reduce the displacement of the end cover relative to the shell during transportation, thereby improving the welding quality of the end cover and the shell, and thus improving the reliability of the battery cell.

[0005] In a first aspect, an embodiment of the present application provides a clamp for clamping a battery cell, wherein the battery cell comprises a first end cover and a shell having a first opening, wherein the first end cover seals the first opening along a first direction, and the clamp comprises a support assembly, a first limiting member and a first driving member; the support assembly is used to support the shell; along the first direction, a first limiting gap for accommodating the shell is formed between the first limiting member and the support assembly, wherein the first direction is perpendicular to the direction of gravity; the first driving member is configured to drive the first limiting member to move along the first direction, so that the first limiting member presses the first end cover and the shell after the first end cover seals the first opening.

[0006] In the above technical solution, the first driving member is configured to drive the first limiting member to move along the first direction. After the pressing device drives the first end cover to seal the first opening, the first driving member drives the first limiting member to move along the first direction, so that the first limiting member and the supporting assembly press the first end cover and the shell, so that the first end cover maintains the state of sealing the first opening, thereby reducing the risk of the first end cover moving relative to the shell in the first direction causing the gap between the shell and the first end cover in the first direction to be too large, thereby improving the welding quality of the first end cover and the shell, and then improving the reliability of the battery cell.

[0007] In some embodiments, the first limiting member has a first side in the second direction, the first side is recessed to form a first groove for accommodating the first end cover, the first groove and the first limiting gap are spaced apart along the first direction, and the first direction is perpendicular to the second direction.

[0008] In the above technical solution, the first groove and the first limiting gap are arranged at intervals along the first direction, so that the clamp can limit the first end cover before the pressing device presses the battery cell, and arrange the first end cover and the shell along the first direction to facilitate the pressing device to clamp the first end cover.

[0009] In some embodiments, an extension direction of the first groove is perpendicular to the first direction.

[0010] In the above technical solution, the first groove is recessed along the second direction, and the extension direction of the first groove is perpendicular to the thickness direction of the first end cover, that is, the extension direction of the first groove, the thickness direction of the first end cover and the second direction are perpendicular to each other. At the same time, since the extension direction of the first groove is perpendicular to the first direction, that is, when accommodated in the first groove, the thickness direction of the first end cover is parallel to the first direction, it is convenient for the press-fitting device to drive the first end cover to seal the first opening along the first direction.

[0011] In some embodiments, the clamp further includes a second driving member, wherein the second driving member is configured to drive the first limiting member to move along a second direction, and the first direction is perpendicular to the second direction.

[0012] In the above technical solution, the second driving member is configured to drive the first limiting member to move along the second direction, so that after the pressing device clamps the first end cover, the second driving member can drive the first limiting member to move along the second direction, thereby reducing the risk of the first limiting member interfering with the pressing device driving the first end cover to seal the first opening along the first direction, and after the pressing device drives the first end cover to seal the first opening, the second driving member can drive the first limiting member to move along the second direction, so that the first end cover and the shell are both located in the first limiting gap, so that the first driving member drives the first limiting member to move along the first direction to press the first end cover and the shell, the structure is simple, and it is easy to implement.

[0013] In some embodiments, there are two first limiting members spaced apart along the second direction, a second limiting gap for accommodating the shell is formed between the two first limiting members, and the first direction, the second direction and the gravity direction are perpendicular to each other.

[0014] In the above technical solution, on the one hand, there are two first limiting members spaced apart along the second direction, so that the two first limiting members can provide pressing force to the first end cover and the shell more evenly after press-fitting, thereby improving the reliability of the clamp limiting the first end cover and the shell; on the other hand, a second limiting gap for accommodating the shell is formed between the two first limiting members, thereby limiting the movement of the shell in the second direction, thereby facilitating the pressing device to limit the shell during the press-fitting process.

[0015] In some embodiments, the first limiting member includes a first body and a first protrusion; the first body is located on one side of the shell in the second direction and extends along the first direction, and along the second direction, the second limiting gap is formed between the two first bodies; the first protrusion protrudes from the surface of the first body facing the second limiting gap along the second direction, and along the first direction, the first limiting gap is formed between the first protrusion and the support assembly.

[0016] In the above technical solution, a first limiting gap is formed between the first protrusion and the supporting assembly along the first direction, and a second limiting gap is formed between the two first bodies along the second direction, so that when the first protrusion presses the first end cover and the shell along the first direction after press-fitting, the first body can limit the first end cover and the shell along the second direction, thereby reducing the risk of relative movement between the first end cover and the shell in the second direction causing misalignment of the shell and the first end cover in the second direction.

[0017] In some embodiments, a dimension of the first limiting member in the gravity direction is smaller than a dimension of the first end cover in the gravity direction.

[0018] In the above technical solution, the size of the first limit member in the gravity direction is smaller than the size of the first end cover in the gravity direction, so that at least one end of the first end cover in the gravity direction exceeds one end of the first limit member in the gravity direction along the gravity direction, thereby facilitating the pressing device to clamp through this part of the first end cover.

[0019] In some embodiments, the shell has a second opening arranged opposite to the first opening in the first direction, and the battery cell also includes a second end cover, and the second end cover covers the second opening along the first direction; the support assembly includes a support member, a second limit member and a third driving member; the support member is used to support the shell, and the first limit member is arranged on the support member; the second limit member is arranged on the support member, and the first limit gap is formed between the first limit member and the second limit member along the first direction; the third driving member is configured to drive the second limit member to move along the first direction, so that the second limit member presses the second end cover after the second end cover covers the second opening.

[0020] In the above technical solution, the third driving member is configured to drive the second limiting member to move along the first direction. After the pressing device drives the second end cover to seal the second opening, the third driving member drives the second limiting member to move along the first direction, so that the first limiting member and the second limiting member press the first end cover, the shell and the second end cover tightly, so that the first end cover maintains a state of sealing the first opening, and the second end cover maintains a state of sealing the second opening, thereby reducing the risk of the second end cover moving relative to the shell along the first direction causing the gap between the second end cover and the shell in the first direction to be too large, thereby improving the welding quality of the second end cover and the shell, and further improving the reliability of the battery cell.

[0021] In the second aspect, an embodiment of the present application further provides a press-fitting device for press-fitting a battery cell, wherein the battery cell comprises a first end cover and a shell having a first opening, the press-fitting device comprises a clamp and a first press-fitting mechanism as described in any embodiment of the first aspect, the first press-fitting mechanism being arranged on one side of the clamp in the first direction, the first press-fitting mechanism being used to press the first end cover along the first direction so that the first end cover cooperates with the shell and seals the first opening.

[0022] In some embodiments, the press-fitting device further includes a first limiting mechanism; the first limiting mechanism is used to limit the first end cover and the shell in a second direction, and the first direction, the second direction and the gravity direction are perpendicular to each other.

[0023] In the above technical solution, the first limiting mechanism limits the first end cover and the shell in the second direction, so that when the first pressing mechanism presses the first end cover along the first direction, the movement of the first end cover relative to the shell is restricted in the second direction, which is beneficial to improve the stability of the movement of the first end cover along the first direction and improve the assembly accuracy of the battery cell.

[0024] In some embodiments, the first limiting mechanism includes two third limiting members and a fifth driving member; along the second direction, a third limiting gap for accommodating the first end cover and the shell is formed between the two third limiting members; the fifth driving member is configured to drive the two third limiting members to move toward each other along the second direction, so that the two third limiting members limit the first end cover and the shell in the second direction.

[0025] In the above technical solution, the fifth driving member is configured to drive the two third limiting members to move toward each other along the second direction, so that the two third limiting members limit the first end cover and the shell in the second direction, so that in the process of pressing the first end cover along the first direction by the first pressing mechanism, the first end cover and the shell will not move along the second direction relative to the two third limiting members, thereby improving the supporting stability of the support assembly and the assembly accuracy of the battery cell.

[0026] In some embodiments, the press-fitting device further includes a second limiting mechanism; the second limiting mechanism is used to limit the first end cover and the shell in the direction of gravity.

[0027] In the above technical solution, the second limiting mechanism limits the first end cover and the shell in the direction of gravity, so that in the process of pressing the first end cover along the first direction by the first pressing mechanism, the movement of the first end cover relative to the shell is restricted in the direction of gravity, which is beneficial to improve the stability of the movement of the first end cover along the first direction and improve the assembly accuracy of the battery cell.

[0028] In some embodiments, the shell has a second opening arranged opposite to the first opening in the first direction, and the battery cell also includes a second end cover; the press-fitting device also includes a third limiting mechanism and a second press-fitting mechanism; the second press-fitting mechanism is arranged on the other side of the clamp in the first direction away from the first press-fitting mechanism, and the second press-fitting mechanism is used to press the second end cover along the first direction so that the second end cover cooperates with the shell and seals the second opening; the third limiting mechanism is used to limit the second end cover and the shell in the second direction.

[0029] In the above technical solution, the third limiting mechanism limits the second end cover and the shell in the second direction, so that when the second pressing mechanism presses the second end cover along the first direction, the movement of the second end cover relative to the shell is restricted in the second direction, which is beneficial to improve the stability of the movement of the second end cover along the first direction and improve the assembly accuracy of the battery cell.

[0030] In some embodiments, the third limiting mechanism includes two fifth limiting members and a seventh driving member; along the second direction, a fifth limiting gap for accommodating the second end cover and the shell is formed between the two fifth limiting members; the seventh driving member is configured to drive the two fifth limiting members to move toward each other along the second direction, so that the two fifth limiting members limit the second end cover and the shell in the second direction.

[0031] In the above technical solution, the seventh driving member is configured to drive the two fifth limiting members to move toward each other in the second direction, so that the two fifth limiting members limit the second end cover and the shell in the second direction, so that in the process of pressing the second end cover by the second pressing mechanism along the first direction, the second end cover and the shell will not move relative to the two fifth limiting members in the second direction, thereby improving the supporting stability of the support assembly and the assembly accuracy of the battery cell.

[0032] In some embodiments, the third limiting mechanism is used to limit the second end cover and the shell in the second direction after the first limiting mechanism limits the first end cover and the shell; the third limiting mechanism also includes a first sensor; the first sensor is used to detect a first pressure value between the fifth limiting member and the second end cover and the shell, and the seventh driving member responds to the first pressure value to limit the two fifth limiting members from moving toward each other along the second direction when the first pressure value reaches a threshold value.

[0033] In the above technical solution, the seventh driving member responds to the first pressure value to limit the two fifth limiting members from moving toward each other in the second direction when the first pressure value reaches a threshold value. Therefore, after the first limiting mechanism limits the first end cover and the shell, the seventh driving member drives the two fifth limiting members to move toward each other in the second direction to abut against the shell, thereby limiting the abutment force between the fifth limiting members and the shell, thereby reducing the risk of the shell being crushed by the fifth limiting member.

[0034] In some embodiments, the press-fitting device further includes a fourth limiting mechanism; the fourth limiting mechanism is used to limit the second end cover and the shell in the direction of gravity.

[0035] In the above technical solution, the fourth limiting mechanism limits the second end cover and the shell in the direction of gravity, so that in the process of pressing the second end cover along the first direction by the second pressing mechanism, the movement of the second end cover relative to the shell is restricted in the direction of gravity, which is beneficial to improve the stability of the movement of the second end cover along the first direction and improve the assembly accuracy of the battery cell.

[0036] In the third aspect, an embodiment of the present application also provides a battery production line including a pressing device and a welding device as provided in any embodiment of the second aspect; the welding device is used to weld or pre-weld the shell and the first end cover, and the welding device is located downstream of the pressing device.

[0037] In the above technical scheme, because there is a pressing device as provided in any embodiment of the second aspect, there is also a clamp provided in any embodiment of the first aspect, so that it is convenient to separate the welding device and the pressing device, and move the battery cell from the pressing device to the welding device through the clamp, so that when the pressing device presses the battery cell, the welding device can weld the previous battery cell that has been pressed by the pressing device, thereby reducing the production cycle of the process and improving the production efficiency of the battery cell compared to the situation where pressing and welding are carried out in the same process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a clamp provided in some embodiments of the present application;

[0040] Figure 2 A schematic diagram of the structure of the clamp provided in some embodiments of the present application in another direction;

[0041] Figure 3 An exploded schematic diagram of a battery cell provided in some embodiments of the present application;

[0042] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0043] Figure 5 A schematic diagram of the structure of a first position-limiting member provided in some embodiments of the present application;

[0044] Figure 6 for Figure 1 The enlarged view of point A in the middle;

[0045] Figure 7 A schematic diagram of the structure of another clamp provided in some embodiments of the present application;

[0046] Figure 8 A schematic diagram of the structure of a press-fitting device provided in some embodiments of the present application;

[0047] Fig. 9 A schematic diagram of the structure of the press-fitting device provided in some embodiments of the present application in another direction;

[0048] Fig.10 A schematic structural diagram of a third position limiting member provided in some embodiments of the present application.

[0049] Icon: 100-Pressing device;

[0050] 10-clamp; 10A-first limiting gap; 10B-second limiting gap;

[0051] 11-support assembly; 111-support member; 1111-first platform; 1112-second platform; 1113-support plate; 111A-stopper; 112-second stopper; 113-third driving member; 12-first stopper; 121-first convex portion; 1211-first side; 1212-first groove; 122-first body; 13-first driving member; 14-second driving member;

[0052] 20 - battery cell; 21 - housing; 22 - first end cover; 23 - second end cover; 24 - electrode assembly;

[0053] 30-first pressing mechanism; 31-first pressing block; 32-ninth driving member;

[0054] 40-first limiting mechanism; 41-third limiting member; 411-first avoidance groove; 42-fifth driving member;

[0055] 50-second limiting mechanism; 51-fourth limiting member; 52-sixth driving member;

[0056] 60-third limiting mechanism; 61-fifth limiting member; 62-seventh driving member; 70-fourth limiting mechanism; 80-second pressing mechanism;

[0057] 90 - third platform; 91 - tenth driving member; 92 - fourth platform; 93 - twelfth driving member;

[0058] X-first direction; Y-second direction; Z-gravity direction. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] The term “plurality” used in this application refers to two or more (including two).

[0066] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0067] The battery cell includes a shell, a first end cap and an electrode assembly, and the electrode assembly is accommodated in the shell. The shell has a first opening on one side in the first direction, and the first end cap is used to cover the first opening, so that the first end cap and the shell together form a storage space for accommodating the electrode assembly. In the process of assembling the shell, the first end cap and the electrode assembly to form a battery cell, the electrode assembly is generally accommodated in the shell by a press-fitting device and the first opening of the shell is sealed with the first end cap to complete the press-fitting, and then the first end cap and the shell are limited by pre-welding or welding by a welding device. After the press-fitting is completed, during the transportation to the welding device, the end cap may move relative to the shell, resulting in an excessive gap between the shell and the end cap, thereby reducing the welding quality of the end cap and the shell, thereby reducing the reliability of the battery cell.

[0068] Based on the above considerations, in order to reduce the displacement of the first end cover relative to the shell, the welding quality between the first end cover and the shell is improved, thereby improving the reliability of the battery cell.

[0069] The embodiment of the present application provides a clamp for clamping a battery cell, wherein the battery cell includes a first end cover and a shell having a first opening, wherein the first end cover seals the first opening along a first direction. The clamp includes a support assembly, a first limiter, and a first drive member; the support assembly is used to support the shell; along the first direction, a first limit gap for accommodating the shell is formed between the first limiter and the support assembly, wherein the first direction is perpendicular to the direction of gravity; the first drive member is configured to drive the first limiter to move along the first direction, so that after the first end cover seals the first opening, the first limiter presses the first end cover 22 and the shell tightly.

[0070] In the above-mentioned clamp, the first driving member is configured to drive the first limiting member to move along the first direction. After the pressing device drives the first end cover to seal the first opening, the first driving member drives the first limiting member to move along the first direction, so that the first limiting member and the supporting assembly press the first end cover and the shell, so that the first end cover maintains the state of sealing the first opening, thereby reducing the risk of the first end cover moving relative to the shell in the first direction causing the gap between the shell and the first end cover in the first direction to be too large, thereby improving the welding quality of the first end cover and the shell, and then improving the reliability of the battery cell.

[0071] The specific structures of the clamp, the pressing device and the battery production line are described in detail below with reference to the accompanying drawings.

[0072] Please refer to Figure 1 and Figure 2 , and please refer to Figure 3 , Figure 1 This is a schematic diagram of the structure of the clamp 10 provided in some embodiments of the present application. Figure 2 This is a schematic diagram of the structure of the clamp 10 provided in some embodiments of the present application in another direction. Figure 3An exploded schematic diagram of a battery cell 20 provided for some embodiments of the present application. The present application provides a clamp 10 for clamping a battery cell 20, wherein the battery cell 20 comprises a first end cover 22 and a shell 21 having a first opening, wherein the first end cover 22 covers the first opening along a first direction X, and the clamp 10 comprises a support assembly 11, a first stopper 12, and a first drive member 13; the support assembly 11 is used to support the shell 21; along the first direction X, a first stopper gap 10A for accommodating the shell 21 is formed between the first stopper 12 and the support assembly 11, wherein the first direction X is perpendicular to the gravity direction Z; and the first drive member 13 is configured to drive the first stopper 12 to move along the first direction X, so that after the first end cover 22 covers the first opening, the first stopper 12 presses the first end cover 22 and the shell 21.

[0073] The housing 21 has a first opening at one end in the first direction X, so that the electrode assembly 24 can be placed inside the housing 21 through the first opening. The housing 21 can be made of a metal material, such as aluminum, aluminum alloy, or nickel-plated steel. The first end cap 22 is sealed on the first opening to isolate the outside world from the inside of the housing 21, so as to provide the electrode assembly 24 with a stable working environment.

[0074] The supporting assembly 11 is a assembly in the fixture 10 for placing the housing 21 .

[0075] The first stopper 12 is a component in the clamp 10 used to cooperate with the support assembly 11 to limit the movement of the housing 21 in the first direction X, and used to press the first end cover 22 and the housing 21 along the first direction X after press-fitting. Exemplarily, the first stopper 12 can be adjustably arranged on the support assembly 11 along the first direction X, and the first stopper 12 can also be connected to other structural components of the clamp 10, and indirectly connected to the support assembly 11 through other structural components or not connected to the support assembly 11.

[0076] The first direction X is the direction in which the housing 21 and the first end cover 22 are buckled. Exemplarily, the first direction X can be any horizontal direction. In some embodiments, the first direction X is parallel to the length direction of the battery cell 20 .

[0077] In some embodiments, the support assembly 11 has a first surface in the gravity direction Z, and has a second surface facing the first limit member 12 in the first direction X, the first surface is recessed to form a groove, the groove extends along the first direction X to the second surface, the bottom wall of the groove is used to support the shell 21, and the first gap is located on the side of the first limit member 12 facing the groove in the first direction X and the side wall of the groove away from the second surface in the first direction X.

[0078] In some embodiments, the support assembly 11 has a first surface in the gravity direction Z, and the first surface is used to support the shell 21. The support assembly 11 also includes a protrusion, and the first protrusion 121 protrudes from the first surface along the gravity direction Z. The gap between the first limit member 12 and the protrusion in the first direction X is a first gap.

[0079] The first driving member 13 is a component that drives the first limiting member 12 to press the first end cover 22 and the housing 21 in the first direction X. Exemplarily, the first driving member 13 can be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0080] The first driving member 13 may be disposed on a side of the supporting assembly 11 that is away from the housing 21 in the gravity direction Z to reduce the risk of the first driving member 13 interfering with the housing 21 .

[0081] In some embodiments, the first driving member 13 can be indirectly connected to the first limiting member 12 through an elastic member, so that the first limiting member 12 presses the first end cover 22 and the housing 21, and when the output end of the first driving member 13 has a tendency to continue to drive the elastic member and the first limiting member 12 to move along the first direction X, the elastic member can be elastically deformed and elongated to reduce the risk of the first limiting member 12 crushing the housing 21 and the first end cover 22. Exemplarily, the elastic member can be a spring.

[0082] In this embodiment, the first driving member 13 is configured to drive the first limiting member 12 to move along the first direction X. After the pressing device 100 drives the first end cover 22 to cover the first opening, the first driving member 13 drives the first limiting member 12 to move along the first direction X, so that the first limiting member 12 and the supporting assembly 11 press the first end cover 22 and the shell 21, so that the first end cover 22 maintains the state of covering the first opening, thereby reducing the risk of the first end cover 22 moving relative to the shell 21 along the first direction X, resulting in an excessive gap between the shell 21 and the first end cover 22 in the first direction X, thereby improving the welding quality of the first end cover 22 and the shell 21, and further improving the reliability of the battery cell 20.

[0083] Please refer to Figure 2 and Figure 4 , and please refer to Figure 5 , Figure 4 for Figure 2 The enlarged view of point B in the middle. Figure 5 A schematic diagram of the structure of the first stopper 12 provided in some embodiments of the present application. According to some embodiments of the present application, the first stopper 12 has a first side 1211 in the second direction Y, the first side 1211 is recessed to form a first groove 1212 for accommodating the first end cover 22, the first groove 1212 and the first limit gap 10A are spaced apart along the first direction X, and the first direction X is perpendicular to the second direction Y.

[0084] The second direction Y is a direction perpendicular to the first direction X. For example, the second direction Y may be parallel to the gravity direction Z, or the second direction Y may be a horizontal direction perpendicular to the first direction X.

[0085] It can be understood that when part of the first end cover 22 is accommodated in the first groove 1212, the extension direction of the first groove 1212 should be perpendicular to the thickness direction of the first end cover 22. Exemplarily, the first groove 1212 can extend along the first direction X so that the first end cover 22 is perpendicular to the side of the housing 21 having the first opening; the first groove 1212 can also extend along the gravity direction Z so that the first end cover 22 is parallel to the side of the housing 21 having the first opening.

[0086] In some embodiments, the second direction Y is parallel to the gravity direction Z, a portion of the first limit member 12 is disposed below the support assembly 11 and moves along the first direction X, and along the first direction X, another portion of the first limit member 12 protrudes from one end of the support assembly 11 in the first direction X and is used to support the first end cover 22, and the first groove 1212 is disposed on another portion of the first limit member 12.

[0087] In some embodiments, the second direction Y is perpendicular to the gravity direction Z, the first limit member 12 is movably disposed above the support assembly 11 along the first direction X, and is located on one side of the support assembly 11 in the second direction Y, the first groove 1212 is disposed on the side of the first limit member 12 facing the support assembly 11 in the second direction Y, one end of the first end cover 22 in the second direction Y is accommodated in the first groove 1212, and the support assembly 11 extends in the first direction X to the first groove 1212 to support the first end cover 22.

[0088] In this embodiment, the first groove 1212 and the first limiting gap 10A are arranged at intervals along the first direction X, so that the clamp 10 can limit the first end cover 22 before the pressing device 100 presses the battery cell 20, and arrange the first end cover 22 and the shell 21 along the first direction X to facilitate the pressing device 100 to clamp the first end cover 22.

[0089] According to some embodiments of the present application, an extension direction of the first groove 1212 is perpendicular to the first direction X.

[0090] Specifically, the first groove 1212 is formed by the first side 1211 being recessed along the second direction Y, that is, the extension direction of the first groove 1212 is perpendicular to the second direction Y, and the extension direction of the first groove 1212 is perpendicular to the first direction X, that is, the extension direction of the first groove 1212, the first direction X, and the second direction Y are perpendicular to each other, and the thickness direction of the first end cover 22 is perpendicular to the extension direction of the first groove 1212 and the second direction Y, so that the thickness direction of the first end cover 22 is parallel to the first direction X, so that when the press-fitting device 100 clamps the first end cover 22, it is not necessary to rotate the first end cover 22 to adjust the angle of the first end cover 22, and the first end cover 22 can be driven to move along the first direction X to cover the first opening. This facilitates the press-fitting device 100 to press-fit the battery cell 20 carried on the fixture 10.

[0091] In this embodiment, the first groove 1212 is recessed along the second direction Y, and the extension direction of the first groove 1212 is perpendicular to the thickness direction of the first end cover 22, that is, the extension direction of the first groove 1212, the thickness direction of the first end cover 22 and the second direction Y are perpendicular to each other. At the same time, since the extension direction of the first groove 1212 is perpendicular to the first direction X, that is, when accommodated in the first groove 1212, the thickness direction of the first end cover 22 is parallel to the first direction X, it is convenient for the press-fitting device 100 to drive the first end cover 22 to seal the first opening along the first direction X.

[0092] Please refer to Figure 1 According to some embodiments of the present application, the clamp 10 further includes a second driving member 14 , which is configured to drive the first limiting member 12 to move along a second direction Y, and the first direction X is perpendicular to the second direction Y.

[0093] The second driving member 14 is a member for driving the first limiting member 12 to move in the second direction Y. For example, the second driving member 14 may be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0094] The second driving member 14 may be disposed on a side of the supporting assembly 11 that is away from the housing 21 in the gravity direction Z to reduce the risk of the first driving member 13 interfering with the housing 21 .

[0095] In some embodiments, the output end of the second driving member 14 is connected to the first driving member 13, and the output end of the first driving member 13 is connected to the first limiting member 12. The second driving member 14 is used to drive the first driving member 13 and the first limiting member 12 to move along the second direction Y, and the first driving member 13 is used to drive the first limiting member 12 to move along the first direction X.

[0096] In some instances, the output end of the first driving member 13 is connected to the second driving member 14, and the output end of the second driving member 14 is connected to the first limiting member 12. The first driving member 13 is used to drive the second driving member 14 and the first limiting member 12 to move along the first direction X, and the second driving member 14 is used to drive the first limiting member 12 to move along the second direction Y.

[0097] In this embodiment, the second driving member 14 is configured to drive the first limiting member 12 to move along the second direction Y, so that after the pressing device 100 clamps the first end cover 22, the second driving member 14 can drive the first limiting member 12 to move along the second direction Y, thereby reducing the risk of the first limiting member 12 interfering with the pressing device 100 driving the first end cover 22 to seal the first opening along the first direction X, and after the pressing device 100 drives the first end cover 22 to seal the first opening, the second driving member 14 can drive the first limiting member 12 to move along the second direction Y, so that the first end cover 22 and the shell 21 are both located in the first limiting gap 10A, so that the first driving member 13 can drive the first limiting member 12 to move along the first direction X to press the first end cover 22 and the shell 21. The structure is simple and easy to implement.

[0098] Please refer to Figure 1 and Figure 2 According to some embodiments of the present application, there are two first limiting members 12 spaced apart along the second direction Y, and a second limiting gap 10B for accommodating the shell 21 is formed between the two first limiting members 12. The first direction X, the second direction Y and the gravity direction Z are perpendicular to each other.

[0099] When the two first limiting members 12 limit the housing 21 in the second direction Y, the two first limiting members 12 can abut against two opposite sides of the housing 21 in the second direction Y to reduce the risk of the housing 21 moving in the second direction Y.

[0100] By setting the second driving member 14 to drive the two first limiting members 12 to move along the second direction Y, so as to adjust the size of the second limiting gap 10B in the second direction Y, on the one hand, the first end covers 22 of different sizes can be limited; on the other hand, when the pressing device 100 seals the first opening through the first end cover 22, the first limiting member can be driven to move along the second direction Y through the second driving member 14 to reduce the risk of the first limiting member 12 interfering with the movement of the first end cover 22.

[0101] In this embodiment, on the one hand, there are two first limiting members 12 arranged at intervals along the second direction Y, so that the two first limiting members 12 can provide pressing force to the first end cover 22 and the shell 21 more evenly after pressing, thereby improving the reliability of the clamp 10 limiting the first end cover 22 and the shell 21; on the other hand, a second limiting gap 10B for accommodating the shell 21 is formed between the two first limiting members 12, thereby limiting the movement of the shell 21 in the second direction Y, thereby facilitating the pressing device 100 to limit the shell 21 during the pressing process.

[0102] Please refer to Figure 2 and Figure 4 , and please refer to Figure 5 According to some embodiments of the present application, the first limiting member 12 includes a first body 122 and a first protrusion 121; the first body 122 is located on one side of the shell 21 in the second direction Y and extends along the first direction X, and along the second direction Y, a second limiting gap 10B is formed between the two first bodies 122; the first protrusion 121 protrudes from the surface of the first body 122 facing the second limiting gap 10B along the second direction Y, and along the first direction X, a first limiting gap 10A is formed between the first protrusion 121 and the support assembly 11.

[0103] The first body 122 is a portion of the first stopper 12 that connects the first protrusion 121 and other structural members of the clamp 10. Exemplarily, the first body 122 can be made of a metal material so that the first body 122 has a certain strength, thereby reducing the risk of deformation of the first body 122 when the first body 122 drives the first protrusion 121 to press the first end cover 22 and the housing 21 along the first direction X.

[0104] In some embodiments, the first body 122 is connected to the output end of the first driving member 13 , and the first driving member 13 drives the first protrusion 121 to move along the first direction X through the first body 122 .

[0105] The first protrusion 121 is a component of the first stopper 12 for pressing the first end cover 22 and the housing 21 along the first direction X. The first body 122 may be made of plastic to reduce the risk of the first protrusion 121 scratching the first end cover 22 and the housing 21 .

[0106] In some embodiments, the first groove 1212 is disposed on a side of the first protrusion 121 facing the other first limiting member 12 in the second direction Y.

[0107] In this embodiment, a first limiting gap 10A is formed between the first protrusion 121 and the support assembly 11 along the first direction X, and a second limiting gap 10B is formed between the two first bodies 122 along the second direction Y, so that when the first protrusion 121 presses the first end cover 22 and the shell 21 along the first direction X after press-fitting, the first body 122 can limit the first end cover 22 and the shell 21 along the second direction Y, thereby reducing the risk of relative movement between the first end cover 22 and the shell 21 in the second direction Y causing the shell 21 and the first end cover 22 to be misaligned in the second direction Y.

[0108] Please refer to Figure 1 and Figure 6 , Figure 6 for Figure 1 In the enlarged view at point A, according to some embodiments of the present application, the size of the first limit member 12 in the gravity direction Z is smaller than the size of the first end cover 22 in the gravity direction Z.

[0109] In this embodiment, the size of the first limit member 12 in the gravity direction Z is smaller than the size of the first end cover 22 in the gravity direction Z, so that at least one end of the first end cover 22 in the gravity direction Z exceeds one end of the first limit member 12 in the gravity direction Z along the gravity direction Z, thereby facilitating the pressing device 100 to clamp through this part of the first end cover 22.

[0110] Please refer to Figure 1 and Figure 2 , and please refer to Figure 3 and Figure 7 According to some embodiments of the present application, the shell 21 has a second opening arranged opposite to the first opening in the first direction X, and the battery cell 20 also includes a second end cover 23; the support assembly 11 includes a support member 111, a second limit member 112 and a third driving member 113; the support member 111 is used to support the shell 21, and the first limit member 12 is arranged on the support member 111; the second limit member 112 is arranged on the support member 111, and a first limit gap 10A is formed between the first limit member 12 and the second limit member 112 along the first direction X; the third driving member 113 is configured to drive the second limit member 112 to move along the first direction X, so that the second limit member 112 presses the second end cover 23 after the second end cover 23 covers the second opening.

[0111] In some embodiments, the housing 21 is provided with a first opening at one end in the first direction X, and a second opening at the other end in the first direction X, so that the electrode assembly 24 can be placed inside the housing 21 through any of the openings. The first end cap 22 and the second end cap 23 are respectively sealed at the first opening and the second opening to isolate the outside world from the inside of the housing 21, so as to provide the electrode assembly 24 with a stable working environment.

[0112] The support member 111 is a portion of the support assembly 11 for placing the shell 21. Exemplarily, the support member 111 can be made of metal material to reduce the risk of deformation of the support member 111 when supporting the shell 21 and the first end, so that the support member 111 can stably support the battery cell 20.

[0113] In some embodiments, the support member 111 is used to support the side of the shell 21 and is provided with two stoppers 111A spaced apart along the second direction Y. The two stoppers 111A are used to abut against the shell 21 in the second direction Y to limit the movement of the shell 21 along the second direction Y.

[0114] In some embodiments, the second stopper 112 is two spaced apart along the second direction Y, and the two second stoppers 112 are used to accommodate the housing 21. The second stopper 112 includes a second body and a second convex portion; the second body is located on one side of the housing 21 in the second direction Y and extends along the first direction X. Along the second direction Y, the housing 21 is accommodated between the two second bodies; the second convex portion protrudes from the surface of the second body facing the housing 21 along the second direction Y, and a first stopper gap 10A is formed between the second convex portion and the first convex portion 121 along the first direction X. The second convex portion has a second side in the second direction Y, and the second side is recessed to form a second groove for accommodating the second end cover 23. The first groove 1212, the first stopper gap 10A and the second groove are spaced apart along the first direction X. The fixture 10 also includes a fourth driving member, which is configured to drive the second stopper 112 to move along the second direction Y. Exemplarily, the fourth driving member may be the same driving member as the second driving member 14 , that is, the second driving member 14 drives the first limiting member 12 and the second limiting member 112 to move along the second direction Y at the same time.

[0115] In some embodiments, the support member 111 is a mounting frame, which includes a first platform 1111, a plurality of support plates 1113, and a second platform 1112. The first platform 1111 and the second platform 1112 are arranged at intervals along the gravity direction Z, and the plurality of support plates 1113 are arranged at intervals between the first platform 1111 and the second platform 1112. Both ends of the support plates 1113 are respectively connected to the first platform 1111 and the second platform 1112 to form a first placement space between the first platform 1111 and the second platform 1112. The first driving member 13, the second driving member 14, the third driving member 113, and the fourth driving member are arranged in the first placement space, and the side of the second platform 1112 away from the first placement space is used to support the housing 21. The first stopper 12 and the second stopper 112 are respectively arranged at both ends of the second platform 1112 in the first direction X.

[0116] The third driving member 113 is a component that drives the second limiting member 112 to press the second end cover 23 and the housing 21 in the first direction X. Exemplarily, the third driving member 113 can be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0117] In the present embodiment, the third driving member 113 is configured to drive the second limiting member 112 to move along the first direction X. After the press-fitting device 100 drives the second end cover 23 to cover the second opening, the third driving member 113 drives the second limiting member 112 to move along the first direction X, so that the first limiting member 12 and the second limiting member 112 press the first end cover 22, the shell 21 and the second end cover 23, so that the first end cover 22 remains in a state of covering the first opening, and the second end cover 23 remains in a state of covering the second opening, thereby reducing the risk of the second end cover 23 moving relative to the shell 21 along the first direction X resulting in an excessive gap between the second end cover 23 and the shell 21 in the first direction X, thereby improving the welding quality of the second end cover 23 and the shell 21, and further improving the reliability of the battery cell 20.

[0118] Please refer to Figure 8 and Fig. 9 , Figure 8 This is a schematic diagram of the structure of a press-fitting device 100 provided in some embodiments of the present application. Fig. 9 A schematic diagram of the structure of the press-fitting device 100 provided in some embodiments of the present application in another direction. The present application also provides a press-fitting device 100 for press-fitting a battery cell 20, wherein the battery cell 20 includes a first end cover 22 and a shell 21 having a first opening. The press-fitting device 100 includes a fixture 10 and a first press-fitting mechanism 30 of any of the above embodiments, wherein the first press-fitting mechanism 30 is disposed on one side of the fixture 10 in the first direction X, and the first press-fitting mechanism 30 is used to press the first end cover 22 along the first direction X so that the first end cover 22 cooperates with the shell 21 and seals the first opening.

[0119] The structure of the first pressing mechanism 30 has various forms. Exemplarily, the first pressing mechanism 30 includes a ninth drive and a first pressing block 31. The ninth driving member 32 is used to drive the first pressing block 31 to abut against the first end cover 22 along the first direction X, and drive the first end cover 22 to move along the first direction X so that the first end cover 22 seals the first opening of the shell 21. The ninth driving member 32 can be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0120] Please refer to Figure 8 and Fig. 9 According to some embodiments of the present application, the press-fitting device 100 further includes a first limiting mechanism 40; the first limiting mechanism 40 is used to limit the first end cover 22 and the housing 21 in the second direction Y, and the first direction X, the second direction Y and the gravity direction Z are perpendicular to each other.

[0121] The first direction X is the engagement direction of the first end cover 22 and the housing 21 , and the second direction Y may be the movement direction of the clamp 10 relative to the press-fitting device 100 .

[0122] In some embodiments, both ends of the press-fitting device 100 in the second direction Y are open structures, so that the clamp 10 can pass through both ends of the press-fitting device 100 in the second direction Y to enter or leave the press-fitting device 100 .

[0123] The first limiting mechanism 40 is a mechanism in the press-fitting device 100 for limiting the movement of the first end cover 22 and the housing 21 in the second direction Y when the first press-fitting mechanism 30 drives the first end cover 22 to move along the first direction X.

[0124] In some embodiments, the first limiting mechanism 40 includes two third limiting members 41 spaced apart along the second direction Y, and the gap between the two third limiting members 41 is used to accommodate the first end cover 22 and the shell 21 to limit the movement of the first end cover 22 and the shell 21 in the second direction Y.

[0125] In this embodiment, the first limiting mechanism 40 limits the first end cover 22 and the shell 21 in the second direction Y, so that when the first pressing mechanism 30 presses the first end cover 22 along the first direction X, the movement of the first end cover 22 relative to the shell 21 is restricted in the second direction Y, which is beneficial to improving the stability of the movement of the first end cover 22 along the first direction X and improving the assembly accuracy of the battery cell 20.

[0126] Please refer to Figure 8 and Fig. 9 , and please refer to Fig.10 According to some embodiments of the present application, the first limiting mechanism 40 includes two third limiting members 41 and a fifth driving member 42; along the second direction Y, a third limiting gap for accommodating the first end cover 22 and the shell 21 is formed between the two third limiting members 41; the fifth driving member 42 is configured to drive the two third limiting members 41 to move toward each other along the second direction Y, so that the two third limiting members 41 limit the first end cover 22 and the shell 21 in the second direction Y.

[0127] The fifth driving member 42 is a member for driving the third limiting member 41 to move along the second direction Y. Exemplarily, the fifth driving member 42 may be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0128] There may be two fifth driving members 42 corresponding one to one with the two third limiting members 41 .

[0129] In some embodiments, the pressing device 100 also includes a third platform 90 and a tenth driving member 91. The third platform 90 is arranged on one side of the clamp 10 in the first direction X, the fifth driving member 42 is arranged at the output end of the tenth driving member 91, and the third limiting member 41 is connected to the output end of the fifth driving member 42. The tenth driving member 91 is used to drive the fifth driving member 42 and the third limiting member 41 to move along the first direction X, so as to reduce the risk of interference between the third limiting member 41 and the clamp 10 when the clamp 10 drives the battery cell 20 to move along the second direction Y.

[0130] When the two third stoppers 41 limit the housing 21 and the first end cover 22 in the second direction Y, the two third stoppers 41 can abut against two sides of the housing 21 and the first end cover 22 that are oppositely arranged in the second direction Y in the second direction Y, so as to reduce the risk of the housing 21 and the first end cover 22 moving in the second direction Y.

[0131] The fifth driving member 42 is provided to drive the two third limiting members 41 to move along the second direction Y to adjust the distance between the two third limiting members 41 in the second direction Y, so that the first limiting mechanism 40 can limit the first end covers 22 of different sizes.

[0132] In some embodiments, one of the two third stoppers 41 is recessed on the side facing the other in the second direction Y to form a first avoidance groove 411, and when the fifth driving member 42 drives the third stopper 41 to abut against the housing 21 and the first end cover 22 along the second direction Y, the first stopper 12 is accommodated in the first avoidance groove 411, so as to reduce the risk of interference between the third stopper 41 and the first stopper 12 of the clamp 10.

[0133] In this embodiment, the fifth driving member 42 is configured to drive the two third limiting members 41 to move toward each other along the second direction Y, so that the two third limiting members 41 limit the first end cover 22 and the shell 21 in the second direction Y, so that during the process of pressing the first end cover 22 along the first direction X by the first pressing mechanism 30, the first end cover 22 and the shell 21 will not move along the second direction Y relative to the two third limiting members 41, thereby improving the supporting stability of the support assembly 11 and the assembly accuracy of the battery cell 20.

[0134] Please refer to Figure 8 and Fig. 9 According to some embodiments of the present application, the press-fitting device 100 further includes a second limiting mechanism 50; the second limiting mechanism 50 is used to limit the first end cover 22 and the housing 21 in the gravity direction Z.

[0135] The second limiting mechanism 50 is a mechanism in the press-fitting device 100 for limiting the movement of the first end cover 22 and the housing 21 in the gravity direction Z when the first press-fitting mechanism 30 drives the first end cover 22 to move along the first direction X.

[0136] In some embodiments, the second limiting mechanism 50 includes two fourth limiting members 51 and a sixth driving member 52, the two fourth limiting members 51 are arranged at intervals along the gravity direction Z, and the gap between the two fourth limiting members 51 is used to accommodate the first end cover 22 and the housing 21 to limit the movement of the first end cover 22 and the housing 21 in the gravity direction Z. The sixth driving member 52 is configured to drive the two fourth limiting members 51 to move toward each other along the gravity direction Z, so that the two fourth limiting members 51 limit the first end cover 22 and the housing 21 in the gravity direction Z.

[0137] When the two fourth limit members 51 limit the housing 21 and the first end cover 22 in the gravity direction Z, the two fourth limit members 51 can abut against two sides of the housing 21 and the first end cover 22 that are oppositely arranged in the gravity direction Z in the gravity direction Z, so as to reduce the risk of the housing 21 and the first end cover 22 moving in the gravity direction Z.

[0138] The sixth driving member 52 is provided to drive the two fourth limiting members 51 to move in the gravity direction to adjust the distance between the two fourth limiting members 51 in the gravity direction Z, so that the second limiting mechanism 50 can limit the first end covers 22 of different sizes.

[0139] In this embodiment, the second limiting mechanism 50 limits the first end cover 22 and the shell 21 in the gravity direction Z, so that when the first pressing mechanism 30 presses the first end cover 22 along the first direction X, the movement of the first end cover 22 relative to the shell 21 is restricted in the gravity direction Z, which is beneficial to improve the stability of the movement of the first end cover 22 along the first direction X and improve the assembly accuracy of the battery cell 20.

[0140] Please refer to Figure 8 and Fig. 9 According to some embodiments of the present application, the shell 21 has a second opening arranged opposite to the first opening in the first direction X, and the battery cell 20 also includes a second end cover 23; the press-fitting device 100 also includes a third limiting mechanism 60 and a second press-fitting mechanism 80; the second press-fitting mechanism 80 is arranged on the other side of the clamp 10 away from the first press-fitting mechanism 30 in the first direction X, and the second press-fitting mechanism 80 is used to press the second end cover 23 along the first direction X so that the second end cover 23 cooperates with the shell 21 and seals the second opening; the third limiting mechanism 60 is used to limit the second end cover 23 and the shell 21 in the second direction Y.

[0141] The structure of the second pressing mechanism 80 has various forms. Exemplarily, the second pressing mechanism 80 includes an eleventh drive and a second pressing block. The eleventh drive is used to drive the second pressing block to abut against the second end cover 23 along the first direction X, and drive the second end cover 23 to move along the first direction X so that the second end cover 23 seals the second opening of the shell body 21. The eleventh drive can be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0142] The second limiting mechanism 50 is a mechanism in the press-fitting device 100 for limiting the movement of the second end cover 23 and the housing 21 in the second direction Y when the second press-fitting mechanism 80 drives the second end cover 23 to move along the first direction X.

[0143] In some embodiments, the second limiting mechanism 50 includes two fourth limiting members 51 spaced apart along the second direction Y, and the gap between the two fourth limiting members 51 is used to accommodate the second end cover 23 and the shell 21 to limit the movement of the second end cover 23 and the shell 21 in the second direction Y.

[0144] In this embodiment, the third limiting mechanism 60 limits the second end cover 23 and the shell 21 in the second direction Y, so that when the second pressing mechanism 80 presses the second end cover 23 along the first direction X, the movement of the second end cover 23 relative to the shell 21 in the second direction Y is restricted, which is beneficial to improving the stability of the movement of the second end cover 23 along the first direction X and improving the assembly accuracy of the battery cell 20.

[0145] Please refer to Figure 8 and Fig. 9 According to some embodiments of the present application, the third limiting mechanism 60 includes two fifth limiting members 61 and a seventh driving member 62; along the second direction Y, a fifth limiting gap for accommodating the second end cover 23 and the shell 21 is formed between the two fifth limiting members 61; the seventh driving member 62 is configured to drive the two fifth limiting members 61 to move toward each other along the second direction Y, so that the two fifth limiting members 61 limit the second end cover 23 and the shell 21 in the second direction Y.

[0146] The seventh driving member 62 is a member for driving the fifth limiting member 61 to move along the second direction Y. Exemplarily, the seventh driving member 62 may be a driving element such as an electric telescopic rod, a cylinder or a hydraulic cylinder.

[0147] There may be two seventh driving members 62 corresponding one to one with the two fifth limiting members 61 .

[0148] In some embodiments, the pressing device 100 also includes a fourth platform 92 and a twelfth driving member 93, the third platform 90 and the fourth platform 92 are respectively arranged on opposite sides of the clamp 10 in the first direction X, the seventh driving member 62 is arranged at the output end of the twelfth driving member 93, the fifth limiting member 61 is connected to the output end of the seventh driving member 62, and the twelfth driving member 93 is used to drive the seventh driving member 62 and the fifth limiting member 61 to move along the first direction X, so as to reduce the risk of interference between the fifth limiting member 61 and the clamp 10 when the clamp 10 drives the battery cell 20 to move along the second direction Y.

[0149] When the two fifth limiting members 61 limit the housing 21 and the second end cover 23 in the second direction Y, the two fifth limiting members 61 can abut against two sides of the housing 21 and the second end cover 23 that are oppositely arranged in the second direction Y in the second direction Y, so as to reduce the risk of the housing 21 and the second end cover 23 moving in the second direction Y.

[0150] The seventh driving member 62 is provided to drive the two fifth limiting members 61 to move along the second direction Y to adjust the distance between the two fifth limiting members 61 in the second direction Y, so that the second limiting mechanism 50 can limit the first end covers 22 of different sizes.

[0151] In some embodiments, one of the two fifth stoppers 61 is recessed on the side facing the other in the second direction Y to form a second avoidance groove, and when the seventh driving member 62 drives the fifth stopper 61 to abut against the housing 21 and the first end cover 22 along the second direction Y, the second stopper 112 is accommodated in the second avoidance groove, so as to reduce the risk of interference between the fifth stopper 61 and the second stopper 112 of the clamp 10.

[0152] In this embodiment, the seventh driving member 62 is configured to drive the two fifth limiting members 61 to move toward each other along the second direction Y, so that the two fifth limiting members 61 limit the second end cover 23 and the shell 21 in the second direction Y, so that during the process of pressing the second end cover 23 by the second pressing mechanism 80 along the first direction X, the second end cover 23 and the shell 21 will not move relative to the two fifth limiting members 61 along the second direction Y, thereby improving the supporting stability of the support assembly 11 and the assembly accuracy of the battery cell 20.

[0153] Please refer to Figure 8 and Fig. 9According to some embodiments of the present application, the third limiting mechanism 60 is used to limit the second end cover 23 and the shell 21 in the second direction Y after the first limiting mechanism 40 limits the first end cover 22 and the shell 21; the third limiting mechanism 60 also includes a first sensor (not shown in the figure); the first sensor (not shown in the figure) is used to detect a first pressure value between the fifth limiting member 61 and the second end cover 23 and the shell 21, and the seventh driving member 62 responds to the first pressure value to limit the two fifth limiting members 61 from moving toward each other along the second direction Y when the first pressure value reaches a threshold value.

[0154] The first sensor (not shown in the figure) is a component for detecting a first pressure value between the fifth stopper 61 and the second end cover 23 and the housing 21. Exemplarily, the first sensor may be a pressure sensor or a capacitive sensor.

[0155] Specifically, after the first limiting mechanism 40 limits the first end cover 22 and the shell 21 in the second direction Y, the third limiting mechanism 60 can drive the second end cover 23 to move in the second direction Y, so that the two ends of the second end cover 23 in the second direction Y are flush with the two ends of the shell 21 in the second direction Y. At this time, the first pressure value detected by the first sensor can, on the one hand, determine whether the second end cover 23 is limited in place in the second direction Y by detecting whether the first pressure value reaches the first threshold; on the other hand, when the first pressure value reaches the threshold, the two fifth limiting members 61 can be limited to move toward each other along the second direction Y to reduce the risk of the fifth limiting member 61 crushing the shell 21.

[0156] In this embodiment, the seventh driving member 62 responds to the first pressure value to limit the two fifth limiting members 61 from moving toward each other along the second direction Y when the first pressure value reaches a threshold value. Therefore, after the first limiting mechanism 40 limits the first end cover 22 and the shell 21, the seventh driving member 62 drives the two fifth limiting members 61 to move toward each other along the second direction Y to abut against the shell 21, thereby limiting the abutment force between the fifth limiting members 61 and the shell 21, thereby reducing the risk of the shell 21 being crushed by the fifth limiting member 61.

[0157] Please refer to Figure 8 and Fig. 9 According to some embodiments of the present application, the press-fitting device 100 further includes a fourth limiting mechanism 70; the fourth limiting mechanism 70 is used to limit the second end cover 23 and the housing 21 in the gravity direction Z.

[0158] The fourth limiting mechanism 70 is a mechanism in the press-fitting device 100 for limiting the movement of the second end cover 23 and the housing 21 in the gravity direction Z when the second press-fitting mechanism 80 drives the second end cover 23 to move along the first direction X.

[0159] In some embodiments, the fourth limiting mechanism 70 includes two sixth limiting members and an eighth driving member, the two sixth limiting members are arranged at intervals along the gravity direction Z, and the gap between the two sixth limiting members is used to accommodate the second end cover 23 and the housing 21 to limit the movement of the second end cover 23 and the housing 21 in the gravity direction Z. The eighth driving member is configured to drive the two sixth limiting members to move toward each other along the gravity direction Z, so that the two sixth limiting members limit the second end cover 23 and the housing 21 in the gravity direction Z.

[0160] When the two sixth limiters limit the housing 21 and the second end cover 23 in the gravity direction Z, the two sixth limiters can abut against two sides of the housing 21 and the second end cover 23 that are oppositely arranged in the gravity direction Z in the gravity direction Z, so as to reduce the risk of the housing 21 and the second end cover 23 moving in the gravity direction Z.

[0161] In some embodiments, the fourth limiting mechanism 70 is used to limit the second end cover 23 and the shell 21 in the gravity direction Z after the second limiting mechanism 50 limits the first end cover 22 and the shell 21; the fourth limiting mechanism 70 also includes a second sensor; the second sensor is used to detect a second pressure value between the sixth limiting member and the second end cover 23 and the shell 21, and the eighth driving member responds to the second pressure value to limit the two sixth limiting members from moving toward each other along the gravity direction Z when the second pressure value reaches a threshold value.

[0162] In this embodiment, the fourth limiting mechanism 70 limits the second end cover 23 and the shell 21 in the gravity direction Z, so that when the second press-fitting mechanism 80 presses the second end cover 23 along the first direction X, the movement of the second end cover 23 relative to the shell 21 is restricted in the gravity direction Z, which is beneficial to improve the stability of the movement of the second end cover 23 along the first direction X and improve the assembly accuracy of the battery cell 20.

[0163] An embodiment of the present application also provides a battery production line including a pressing device 100 and a welding device as provided in any of the above embodiments; the welding device is used to weld or pre-weld the shell 21 and the first end cover 22, and the welding device is located downstream of the pressing device 100.

[0164] In some embodiments, the battery production line further includes a transmission member for driving the clamp 10 to move between the welding device and the pressing device 100 .

[0165] In this embodiment, because the pressing device 100 provided by any of the above-mentioned embodiments is provided, the clamp 10 provided by any of the above-mentioned embodiments is provided, so that it is convenient to separate the welding device and the pressing device 100, and move the battery cell 20 from the pressing device 100 to the welding device through the clamp 10, so that when the pressing device 100 presses the battery cell 20, the welding device can weld the previous battery cell 20 that has been pressed by the pressing device 100, thereby reducing the production cycle of the process and improving the production efficiency of the battery cell 20 compared to the situation where pressing and welding are performed in the same process.

[0166] According to some embodiments of this application, please refer to Figure 1-Figure 7 The embodiment of the present application provides a clamp 10 for clamping a battery cell 20, wherein the battery cell 20 includes a first end cover 22 and a shell 21 having a first opening, wherein the first end cover 22 covers the first opening along a first direction X, and the shell 21 has a second opening arranged opposite to the first opening in the first direction X, and the battery cell 20 also includes a second end cover 23, wherein the second end cover 23 covers the second opening along the first direction X.

[0167] The clamp 10 includes a support assembly 11, a first stopper 12 and a first drive member 13; the support assembly 11 is used to support the housing 21; along the first direction X, a first stopper gap 10A for accommodating the housing 21 is formed between the first stopper 12 and the support assembly 11; the first drive member 13 is configured to drive the first stopper 12 to move along the first direction X, so that after the first end cover 22 covers the first opening, the first stopper 12 presses the first end cover 22 and the housing 21. The first stopper 12 has a first side 1211 in the second direction Y, the first side 1211 is recessed to form a first groove 1212 for accommodating the first end cover 22, and the first groove 1212 and the first stopper gap 10A are arranged at intervals along the first direction X. The first direction X, the second direction Y and the gravity direction Z are perpendicular to each other. The extension direction of the first groove 1212 is perpendicular to the first direction X. The clamp 10 also includes a second drive member 14, which is configured to drive the first stopper 12 to move along the second direction Y. There are two first limit members 12 arranged at intervals along the second direction Y, and a second limit gap 10B for accommodating the housing 21 is formed between the two first limit members 12. The first limit member 12 includes a first body 122 and a first convex portion 121; the first body 122 is located on one side of the housing 21 in the second direction Y and extends along the first direction X, and a second limit gap 10B is formed between the two first bodies 122 along the second direction Y; the first convex portion 121 protrudes from the surface of the first body 122 facing the second limit gap 10B along the second direction Y, and a first limit gap 10A is formed between the first convex portion 121 and the support assembly 11 along the first direction X. The size of the first limit member 12 in the gravity direction Z is smaller than the size of the first end cover 22 in the gravity direction Z.

[0168] According to some embodiments of this application, please refer to Figure 8-Figure 10 The embodiment of the present application provides a press-fitting device 100 for press-fitting a battery cell 20, wherein the battery cell 20 includes a first end cover 22 and a shell 21 having a first opening, wherein the first end cover 22 covers the first opening along a first direction X, and the shell 21 has a second opening arranged opposite to the first opening in the first direction X, and the battery cell 20 also includes a second end cover 23, wherein the second end cover 23 covers the second opening along the first direction X.

[0169] The press-fitting device 100 includes a fixture 10 and a first press-fitting mechanism 30 as in the above-mentioned embodiment. The first press-fitting mechanism 30 is arranged on one side of the fixture 10 in the first direction X. The first press-fitting mechanism 30 is used to press the first end cover 22 along the first direction X so that the first end cover 22 cooperates with the shell 21 and seals the first opening. The first limiting mechanism 40 is used to limit the first end cover 22 and the shell 21 in the second direction Y. The first direction X, the second direction Y and the gravity direction Z are perpendicular to each other. The first limiting mechanism 40 includes two third limiting members 41 and a fifth driving member 42. Along the second direction Y, a third limiting gap for accommodating the first end cover 22 and the shell 21 is formed between the two third limiting members 41. The fifth driving member 42 is configured to drive the two third limiting members 41 to move toward each other along the second direction Y so that the two third limiting members 41 limit the first end cover 22 and the shell 21 in the second direction Y. The press-fitting device 100 further includes a second limiting mechanism 50; the second limiting mechanism 50 is used to limit the first end cover 22 and the housing 21 in the gravity direction Z. The housing 21 has a second opening arranged opposite to the first opening in the first direction X, and the battery cell 20 further includes a second end cover 23; the press-fitting device 100 further includes a third limiting mechanism 60 and a second pressing mechanism 80; the second pressing mechanism 80 is arranged on the other side of the clamp 10 away from the first pressing mechanism 30 in the first direction X, and the second pressing mechanism 80 is used to press the second end cover 23 along the first direction X, so that the second end cover 23 cooperates with the housing 21 and covers the second opening; the third limiting mechanism 60 is used to limit the second end cover 23 and the housing 21 in the second direction Y. The third limiting mechanism 60 includes two fifth limiting members 61 and a seventh driving member 62; along the second direction Y, a fifth limiting gap for accommodating the second end cover 23 and the housing 21 is formed between the two fifth limiting members 61; the seventh driving member 62 is configured to drive the two fifth limiting members 61 to move toward each other along the second direction Y, so that the two fifth limiting members 61 limit the second end cover 23 and the housing 21 in the second direction Y. The third limiting mechanism 60 is used to limit the second end cover 23 and the housing 21 in the second direction Y after the first limiting mechanism 40 limits the first end cover 22 and the housing 21; the third limiting mechanism 60 also includes a first sensor; the first sensor is used to detect a first pressure value between the fifth limiting member 61 and the second end cover 23 and the housing 21, and the seventh driving member 62 responds to the first pressure value to limit the two fifth limiting members 61 from moving toward each other along the second direction Y when the first pressure value reaches a threshold value. The press-fitting device 100 further includes a fourth limiting mechanism 70 ; the fourth limiting mechanism 70 is used to limit the second end cover 23 and the housing 21 in the gravity direction Z.

[0170] 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.

[0171] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 clamp for clamping a battery cell, wherein the battery cell comprises a first end cover and a shell having a first opening, wherein the first end cover covers the first opening along a first direction, wherein: include: A supporting assembly, used for supporting the housing; A first limiting member, along a first direction, a first limiting gap for accommodating the shell is formed between the first limiting member and the supporting assembly, and the first direction is perpendicular to the direction of gravity; The first driving member is configured to drive the first limiting member to move along the first direction, so that the first limiting member presses the first end cover and the shell tightly after the first end cover covers the first opening.

2. The clamp according to claim 1, characterized in that: The first limiting member has a first side in the second direction, the first side is recessed to form a first groove for accommodating the first end cover, the first groove and the first limiting gap are spaced apart along the first direction, and the first direction is perpendicular to the second direction.

3. The clamp according to claim 2, characterized in that: An extending direction of the first groove is perpendicular to the first direction.

4. The clamp according to claim 1, characterized in that: The clamp further includes a second driving member, wherein the second driving member is configured to drive the first limiting member to move along a second direction, wherein the first direction is perpendicular to the second direction.

5. The clamp according to claim 1, characterized in that: There are two first limiting members spaced apart along the second direction, a second limiting gap for accommodating the shell is formed between the two first limiting members, and the first direction, the second direction and the gravity direction are perpendicular to each other.

6. The clamp according to claim 5, characterized in that: The first limiting member comprises: A first body, the first body is located at one side of the shell in the second direction and extends along the first direction, and the second limiting gap is formed between two first bodies along the second direction; The first protrusion protrudes from a surface of the first body facing the second limiting gap along the second direction, and the first limiting gap is formed between the first protrusion and the supporting assembly along the first direction.

7. The clamp according to claim 1, characterized in that: A size of the first limit member in the gravity direction is smaller than a size of the first end cover in the gravity direction.

8. The clamp according to claim 1, characterized in that: The housing has a second opening arranged opposite to the first opening in the first direction, the battery cell further includes a second end cover, the second end cover covers the second opening along the first direction, and the support assembly includes: A support member, used to support the housing, wherein the first limiting member is disposed on the support member; A second limiting member is disposed on the supporting member, and along the first direction, the first limiting gap is formed between the first limiting member and the second limiting member; The third driving member is configured to drive the second limiting member to move along the first direction, so that the second limiting member presses the second end cover after the second end cover covers the second opening.

9. A press-fitting device for press-fitting a battery cell, wherein the battery cell comprises a first end cover and a shell having a first opening, wherein: include: The clamp as claimed in any one of claims 1 to 8; The first pressing mechanism is arranged on one side of the clamp in the first direction, and is used to press the first end cover along the first direction so that the first end cover cooperates with the shell and seals the first opening.

10. The press-fitting device according to claim 9, characterized in that: The press-fitting device also includes: The first limiting mechanism is used to limit the first end cover and the shell in a second direction, and the first direction, the second direction and the gravity direction are perpendicular to each other.

11. The press-fitting device according to claim 10, characterized in that: The first limiting mechanism comprises: Two third limiting members, along the second direction, a third limiting gap is formed between the two third limiting members for accommodating the first end cover and the housing; The fifth driving member is configured to drive the two third limiting members to move toward each other along the second direction, so that the two third limiting members limit the first end cover and the shell in the second direction.

12. The press-fitting device according to claim 10, characterized in that: The press-fitting device also includes: The second limiting mechanism is used to limit the first end cover and the shell in the direction of gravity.

13. The press-fitting device according to claim 10, characterized in that: The housing has a second opening arranged opposite to the first opening in the first direction, and the battery cell further includes a second end cover; The press-fitting device also includes: a second pressing mechanism, disposed on the other side of the clamp in the first direction away from the first pressing mechanism, the second pressing mechanism being used to press the second end cover along the first direction so that the second end cover is matched with the housing and covers the second opening; The third limiting mechanism is used to limit the second end cover and the shell in the second direction.

14. The press-fitting device according to claim 13, characterized in that: The third limiting mechanism comprises: Two fifth limiting members, along the second direction, a fifth limiting gap for accommodating the second end cover and the housing is formed between the two fifth limiting members; The seventh driving member is configured to drive the two fifth limiting members to move toward each other along the second direction, so that the two fifth limiting members limit the second end cover and the shell in the second direction.

15. The press-fitting device according to claim 14, characterized in that: The third limiting mechanism is used to limit the second end cover and the shell in the second direction after the first limiting mechanism limits the first end cover and the shell; The third limiting mechanism also includes: The first sensor is used to detect a first pressure value between the fifth limit member and the second end cover and the shell. The seventh drive member responds to the first pressure value to limit the two fifth limit members from moving toward each other along the second direction when the first pressure value reaches a threshold.

16. The press-fitting device according to claim 15, characterized in that: The press-fitting device also includes: The fourth limiting mechanism is used to limit the second end cover and the shell in the direction of gravity.

17. A battery production line, characterized in that: include: The press-fitting device according to any one of claims 9 to 16; A welding device is used for welding or pre-welding the shell and the first end cover, and the welding device is located downstream of the press-fitting device.

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