Cover plate assembly and battery

Abstract

A cover plate assembly and a battery. The cover plate assembly is used for being mounted on a battery housing of the battery, and comprises a cover plate (100), fixing rings (200), and poles (300); the cover plate (100) is used for being connected to the battery housing; the fixing rings (200) are mounted on the cover plate (100) and are connected to the battery housing by means of the cover plate (100); each of the poles (300) is at least partially arranged on the inner ring wall of the corresponding fixing ring (200); one of the fixing ring (200) and the pole (300) is provided with at least one extension portion (400), and the other of the fixing ring (200) and the pole (300) is provided with at least one limiting cavity (500); in a first direction (X), each extension portion (400) is at least partially located in the corresponding limiting cavity (500), and the limiting cavity (500) is used for limiting the movement of the extension portion (400); an included angle is formed between the thickness direction of the cover plate (100) and the first direction (X). By means of the fitting of the limiting cavities (500) and the extension portions (400), the problem of low processing efficiency of the battery due to the high processing difficulty between the poles (300) and the cover plate assembly can be solved.

Description

Cover plate assembly and battery

[0001] The present application claims priority to the Chinese patent application No. 202411127862.0, filed on August 15, 2024, and entitled "Cover plate assembly and battery", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a cover plate assembly and a battery. BACKGROUND

[0003] A battery is a device that directly converts chemical energy into electrical energy, widely used in various electronic devices, vehicles, energy storage systems, etc.

[0004] The existing battery has a shell and a cover plate assembly. The cover plate assembly is connected to the shell and serves as a sealing and connecting function. The cover plate assembly is installed with a pole. One end of the pole is used for external connection of a conductive part, and the other end of the pole is used for connection with a pole core of the battery through a tab.

[0005] In the related art, the machining difficulty between the pole and the cover plate assembly is large, which leads to the problem of low machining efficiency of the battery. SUMMARY

[0006] The embodiments of the present application provide a cover plate assembly and a battery to solve the problem of low machining efficiency of the battery caused by the large machining difficulty between the pole and the cover plate assembly.

[0007] In a first aspect, the embodiments of the present application provide a cover plate assembly for installation on a battery shell of a battery. The cover plate assembly comprises:

[0008] a cover plate for connecting the battery shell;

[0009] at least one fixing ring installed on the cover plate and connected to the battery shell through the cover plate;

[0010] a pole at least partially disposed on an inner ring wall of the fixing ring;

[0011] wherein, in the fixing ring and the pole, one of them has at least one extension, and the other of them has at least one limiting cavity; along a first direction, the extension is at least partially located in the limiting cavity, and the limiting cavity is used for limiting the movement of the extension;

[0012] The thickness direction of the cover plate and the first direction are arranged at an included angle.

[0013] The cover plate assembly has the following advantages: the limiting cavity limits the movement of the extension part, limits the relative movement between the pole and the fixing ring, and improves the connection strength between the pole and the fixing ring; the first direction and the thickness direction of the cover plate form an included angle, which can reduce the installation difficulty between the extension part and the limiting cavity, improve the installation efficiency between the fixing ring and the cover plate, improve the connection strength between the extension part and the limiting cavity, and improve the connection stability between the fixing ring and the cover plate, thereby safely protecting the battery.

[0014] In an embodiment, the extension part has an outer side wall, and the limiting cavity has an inner side wall.

[0015] The outer side wall is connected to the inner side wall in the thickness direction of the cover plate, and the inner side wall limits the movement of the outer side wall in the thickness direction of the cover plate.

[0016] The cover plate assembly has the following advantages: the inner side wall can limit the movement of the outer side wall in the thickness direction of the cover plate, improve the connection stability between the fixing ring and the pole, improve the connection strength between the fixing ring and the pole, improve the safety performance of the battery, and prolong the service life of the battery.

[0017] In an embodiment, the outer side wall is formed with a first surface, and the inner side wall is formed with a second surface.

[0018] The first surface abuts against the second surface in the first direction to limit the relative movement between the outer side wall and the inner side wall.

[0019] The cover plate assembly has the following advantages: the first surface abuts against the second surface to limit the movement of the outer side wall and the inner side wall in the first direction, limit the relative movement between the fixing ring and the pole, improve the connection strength between the fixing ring and the pole, and prolong the service life of the battery.

[0020] In an embodiment, a plurality of extension parts are provided, and the plurality of extension parts are arranged at intervals in the thickness direction of the cover plate.

[0021] A plurality of limiting cavities are provided, and the plurality of limiting cavities are arranged at intervals in the thickness direction of the cover plate.

[0022] At least part of one of the extension parts is located in one of the limiting cavities.

[0023] The cover plate assembly has the following advantages: the plurality of extension parts and the plurality of limiting cavities are arranged in cooperation, which can increase the contact area between the extension part and the limiting cavity, improve the connection strength between the extension part and the limiting cavity, increase the connection area between the fixing ring and the pole, improve the connection strength of the cover plate assembly, and prolong the service life of the battery.

[0024] In an embodiment, the plurality of extending portions are arranged in the first direction and are spaced apart from each other.

[0025] The plurality of limiting cavities are arranged in the first direction and are spaced apart from each other.

[0026] At least part of one of the extending portions is arranged in one of the limiting cavities.

[0027] The cover plate assembly has the plurality of extending portions and the plurality of limiting cavities arranged in the first direction, which can reduce the difficulty of connecting the extending portions and the limiting cavities, thereby improving the assembly efficiency of the extending portions and the limiting cavities, and improving the installation efficiency of the cover plate assembly.

[0028] In an embodiment, the cover plate assembly further comprises:

[0029] At least one limiting ring is arranged on at least one of the pole and the fixing ring, and at least part of the limiting ring forms the extending portion.

[0030] The cover plate assembly has the limiting ring for connecting the pole and the fixing ring, which can improve the connection strength between the pole and the fixing ring, thereby improving the safety factor of the cover plate assembly and prolonging the service life of the battery.

[0031] In an embodiment, the limiting ring is provided with two limiting rings, one of which is arranged on the pole, and the other of which is arranged on the fixing ring, and the two limiting rings are connected.

[0032] In the two limiting rings, at least part of one of the limiting rings forms the extending portion, and at least part of the other limiting ring forms the limiting cavity.

[0033] The cover plate assembly has the two limiting rings, which can improve the contact area between the pole and the fixing ring, thereby improving the connection strength between the pole and the fixing ring, improving the safety factor of the cover plate assembly, and prolonging the service life of the battery.

[0034] In an embodiment, the limiting ring is a metal ring, and the metal ring is connected to the pole.

[0035] The cover plate assembly has the metal ring connected to the pole, which can reduce the difficulty of connecting the metal ring and the pole, and can improve the connection strength between the metal ring and the pole, thereby improving the connection strength between the pole and the fixing ring, and prolonging the service life of the battery.

[0036] In an embodiment, the pole has a first surface and a second surface connected in sequence, and the first surface and the second surface are arranged at an included angle.

[0037] At least one of the first surface and the second surface is connected to the metal ring.

[0038] The cover plate assembly of the device, the first surface and the second surface are used to support the metal ring, so as to reduce the connection difficulty of the metal ring, and the second surface is used to guide the installation of the metal ring, so as to reduce the installation difficulty between the metal ring and the pole.

[0039] In one embodiment, the plurality of fixing rings are sequentially connected.

[0040] At least part of the plurality of fixing rings extends into the battery shell, and the fixing ring is used to insulatively connect the pole and the cover plate.

[0041] The cover plate assembly of the device, the plurality of fixing rings enclose the connecting cavity, and the cover plate is arranged in the connecting cavity, so as to improve the connection strength between the cover plate and the fixing ring.

[0042] In one embodiment, the fixing ring comprises a to-be-poured fixing part and a sealing ring.

[0043] The pole is provided with a second extension part extending outward from the outer circumferential surface of the end away from the outside, the sealing ring is sleeved on the pole and located between the to-be-poured fixing part and the second extension part, and the two side ring surfaces of the sealing ring are respectively in sealing abutment with the ring surface of the to-be-poured fixing part and the ring surface of the second extension part close to the first extension part.

[0044] The cover plate assembly of the device, the sealing ring is used to isolate the direct contact between the pole and the cover plate, and can seal and protect the inside of the battery; the to-be-poured fixing part and the insulating stopper are used to avoid the direct connection between the pole and the cover plate and the stable connection therebetween, so as to improve the safety performance of the battery.

[0045] In a second aspect, the embodiments of the present application provide a battery, comprising a battery shell and a cover plate assembly connected to the battery shell. BRIEF DESCRIPTION OF DRAWINGS

[0046] FIG. 1 is a schematic diagram of the main structure of the cover plate assembly provided by the present application;

[0047] FIG. 2 is a schematic diagram of the main structure of the cover plate assembly provided by the present application;

[0048] FIG. 3 is a schematic diagram of the connection structure of the cover plate, the fixing ring and the pole provided by the present application;

[0049] FIG. 4 is a schematic diagram of the main structure of the pole provided by the present application;

[0050] FIG. 5 is a schematic diagram of the main structure of the fixing ring provided by the present application;

[0051] FIG. 6 is a schematic diagram of the connection structure of the cover plate, the fixing ring and the pole provided by the present application;

[0052] Fig. 7 is a schematic view of a main structure of a pole provided by the present application;

[0053] Fig. 8 is a schematic view of a main structure of a fixing ring provided by the present application;

[0054] Fig. 9 is a sectional view of A-A in Fig. 2 of the present application;

[0055] Fig. 10 is a schematic view of a connecting structure of a cover plate, a fixing ring and a pole provided by the present application;

[0056] Fig. 11 is a schematic view of a connecting structure of a cover plate, a fixing ring and a pole provided by the present application;

[0057] Fig. 12 is a schematic view of a main structure of a pole provided by the present application. DETAILED DESCRIPTION

[0058] A battery is a device for directly converting chemical energy into electrical energy, which is widely used in various electronic devices, vehicles, energy storage systems and other fields.

[0059] The existing battery has a shell and a cover plate assembly, the cover plate assembly is connected to the shell and plays a sealing and connecting role; the cover plate assembly is installed with a pole, one end of the pole is used for external connection of a conductive part, and the other end of the pole is used for connection with a pole core of the battery through a tab.

[0060] In the related art, the processing difficulty between the pole and the cover plate assembly is large, thereby causing the battery to have a low processing efficiency.

[0061] The cover plate assembly provided by the embodiments of the present application is used for limiting the movement of the extension part to limit the relative movement between the pole and the fixing ring, thereby improving the connection strength between the pole and the fixing ring; the first direction and the thickness direction of the cover plate are arranged at an included angle, which can reduce the installation difficulty between the extension part and the limiting cavity, thereby improving the installation efficiency between the fixing ring and the cover plate; and the connection strength between the extension part and the limiting cavity can be improved, thereby improving the connection stability between the fixing ring and the cover plate to protect the battery safely; the area of the pole is increased, the overcurrent area of the cover plate assembly is increased, and the performance of the battery is improved.

[0062] As shown in FIG. 1 and FIG. 2, the embodiment of the present application provides a cover plate assembly for installing on a battery shell of a battery, the cover plate assembly comprising: a cover plate 100, a fixing ring 200 and a pole 300; wherein the cover plate 100 is used for connecting the battery shell; the fixing ring 200 is installed on the cover plate 100 and connected to the battery shell through the cover plate 100; the pole 300 is at least partially arranged on the inner ring wall of the fixing ring 200; among the fixing ring 200 and the pole 300, one of them has at least one extension 400, and the other of them has at least one limiting cavity 500; along a first direction X, the extension 400 is at least partially located in the limiting cavity 500, and the limiting cavity 500 is used for limiting the movement of the extension 400; the thickness direction of the cover plate 100 and the first direction X are arranged at an angle.

[0063] It should be noted that after the installation is completed, in order to improve the connection strength between the extension 400 and the limiting cavity 500, an insulating material can be poured between the extension 400 and the limiting cavity 500 by injection molding, and the insulating material can be solidified between the extension 400 and the limiting cavity 500 after cooling, so as to improve the connection strength between the pole 300 and the fixing ring 200.

[0064] It can be understood that the injection molding fixing method is used between the extension 400 and the limiting cavity 500, which can fill the gap between the extension 400 and the limiting cavity 500, so as to improve the connection strength between the extension 400 and the limiting cavity 500, thereby improving the connection strength between the pole 300 and the fixing ring 200, thereby prolonging the service life of the battery.

[0065] It should be noted that the first direction X and the thickness direction of the cover plate 100 are arranged at an angle, which can reduce the installation difficulty between the extension 400 and the limiting cavity 500, thereby improving the installation efficiency between the fixing ring 200 and the cover plate 100; and can improve the connection strength between the extension 400 and the limiting cavity 500, thereby improving the connection stability between the fixing ring 200 and the cover plate 100, so as to protect the battery.

[0066] It should be noted that the first direction X and the thickness direction of the cover plate 100 have a plurality of different setting angles, and the setting angles between the first direction X and the thickness direction of the cover plate 100 will be described in turn.

[0067] In one embodiment, the first direction X and the thickness direction of the cover plate 100 are arranged at an angle of 90 degrees, and along the direction which is arranged at an angle of 90 degrees with the thickness direction of the cover plate 100, the installation difficulty between the extension 400 and the limiting cavity 500 can be reduced, thereby improving the installation efficiency between the fixing ring 200 and the cover plate 100.

[0068] In another embodiment, the first direction X and the thickness of the cover plate 100 are arranged at an angle of 60 degrees, and the extension 400 and the limiting cavity 500 are arranged at an angle of 60 degrees with the thickness direction of the cover plate 100, so as to improve the connection strength between the extension 400 and the limiting cavity 500, thereby improving the connection stability between the fixing ring 200 and the cover plate 100, and safely protecting the battery.

[0069] It can be understood that the specific arrangement angle between the first direction X and the thickness direction of the cover plate 100 is not limited, and can be selected according to actual use requirements, as long as the first direction X and the thickness direction of the cover plate 100 are arranged at an angle.

[0070] It should be noted that the fixing ring 200 and the pole 300 have various different arrangement shapes, and the arrangement shapes of the fixing ring 200 and the pole 300 will be described in turn.

[0071] In one embodiment, the pole 300 is a cylindrical shape, and the fixing ring 200 is a circular ring shape, and the inner circle of the circular ring-shaped fixing ring 200 is connected with the outer peripheral wall of the cylindrical pole 300.

[0072] In another embodiment, the pole 300 is a rectangular column, and the fixing ring 200 is a square ring, and the inner side wall 501 of the square ring pole 300 is connected with the outer side wall 401 of the rectangular column pole 300.

[0073] It can be understood that the specific shape of the fixing ring 200 and the pole 300 is not limited, and can be selected according to actual use requirements, as long as the fixing ring 200 can be connected with the pole 300.

[0074] It should be noted that in the case that the fixing ring 200 and the pole 300 have various different arrangement shapes, the first direction X has various different arrangement modes, and the arrangement modes of the first direction X will be described in turn.

[0075] In one embodiment, in the case that the pole 300 is a cylindrical shape and the fixing ring 200 is a circular ring shape, the first direction X is arranged parallel to the direction of the pole 300 to the fixing ring 200.

[0076] In another embodiment, in the case that the pole 300 is a cylindrical shape and the fixing ring 200 is a circular ring shape, the first direction X is arranged parallel to the axial direction of the pole 300.

[0077] In addition, in another embodiment, in the case that the pole 300 is a rectangular column and the fixing ring 200 is a square ring, the first direction X is arranged parallel to the direction of the pole 300 to the fixing ring 200.

[0078] In addition, in other embodiments, when the pole column 300 is a rectangular column and the fixing ring 200 is a square ring, the first direction X is arranged in parallel with the extension direction of the outer peripheral wall of the pole column 300.

[0079] It can be understood that the specific arrangement of the first direction X is not limited and can be selected according to actual use requirements when the fixing ring 200 and the pole column 300 have various different arrangement shapes.

[0080] It can be understood that the cover plate 100 is used to be connected with the battery shell to safely protect the pole core and the tab in the battery; the fixing ring 200 is used to insulatively connect the cover plate 100 and the pole column 300 to avoid the conductive connection of the pole column 300 and the cover plate 100 to cause the short circuit of the battery, thereby safely protecting the battery; and the arrangement of the pole column 300 can connect the internal circuit of the battery with the external circuit to play the role of transmitting the current in the circuit and leading out the voltage.

[0081] It should be noted that the pole column 300 is made of a conductive material, and the conductive material can be connected with the pole core of the battery through the tab of the battery, so that the pole column 300 can connect the internal circuit of the battery with the external circuit, thereby playing the role of transmitting the current and leading out the voltage.

[0082] It should be noted that the fixing ring 200 is made of an insulating material or a weakly conductive material, and the fixing ring 200 is used to isolate the direct contact of the pole column 300 and the cover plate 100, and the fixing ring 200 can insulatively isolate the pole column 300 and the cover plate 100 to avoid the occurrence of the short circuit of the battery and safely protect the battery, thereby prolonging the service life of the battery.

[0083] It should be noted that the limiting cavity 500 limits the movement of the extension part 400, thereby improving the connection strength between the pole column 300 and the fixing ring 200; and the limiting cavity 500 and the extension part 400 are arranged in cooperation, which has the advantages of low processing difficulty and simple installation, thereby improving the processing efficiency of the battery.

[0084] It should be noted that the extension part 400 and the limiting cavity 500 have various different arrangement positions, and the arrangement positions of the extension part 400 and the limiting cavity 500 will be illustrated in turn as follows.

[0085] As shown in FIGS. 3, 4 and 5, in one embodiment, the extension part 400 is arranged on the pole column 300, the limiting cavity 500 is arranged on the fixing ring 200, the extension part 400 extends towards the side close to the limiting cavity 500, at least part of the extension part 400 is arranged in the limiting cavity 500, the limiting cavity 500 is used to limit the movement of the extension part 400 to limit the relative movement between the pole column 300 and the fixing ring 200, thereby improving the connection strength between the pole column 300 and the fixing ring 200. It should be noted that the extension part 400 and the limiting cavity 500 have various different arrangement positions, and the arrangement positions of the extension part 400 and the limiting cavity 500 will be illustrated in turn as follows.

[0086] As shown in FIG. 6, FIG. 7 and FIG. 8, in another embodiment, the extension 400 is arranged on the fixing ring 200, the limiting cavity 500 is arranged on the pole 300, the extension 400 extends towards the side close to the limiting cavity 500, and at least part of the extension 400 is arranged in the limiting cavity 500, the limiting cavity 500 is used to limit the movement of the extension 400, so as to limit the relative movement between the pole 300 and the fixing ring 200, thereby improving the connection strength between the pole 300 and the fixing ring 200.

[0087] It can be understood that the arrangement positions of the extension 400 and the limiting cavity 500 are not limited, and can be selected according to actual use requirements, as long as the extension 400 and the limiting cavity 500 can limit the relative movement between the pole 300 and the fixing ring 200.

[0088] It should be noted that the use of the extension 400 and the limiting cavity 500 to connect the pole 300 and the fixing ring 200 can increase the size of the pole 300, so as to increase the flow area of the cover plate assembly, thereby improving the performance of the battery.

[0089] The extension 400 provided by the embodiment of the present application has an outer side wall 401, the limiting cavity 500 has an inner side wall 501, the outer side wall 401 is connected to the inner side wall 501 along the thickness direction of the cover plate 100, and the inner side wall 501 is used to limit the movement of the outer side wall 401 along the thickness direction of the cover plate 100.

[0090] It should be noted that the inner side wall 501 can limit the movement of the outer side wall 401 along the thickness direction of the cover plate 100, so as to improve the connection stability between the fixing ring 200 and the pole 300, thereby improving the connection strength between the fixing ring 200 and the pole 300, so as to improve the safety performance of the battery, thereby prolonging the service life of the battery.

[0091] The outer side wall 401 provided by the embodiment of the present application is formed with a first face 402, and the inner side wall 501 is formed with a second face 502; along the first direction X, the first face 402 abuts against the second face 502, so as to limit the relative movement between the outer side wall 401 and the inner side wall 501.

[0092] It can be understood that the abutment of the first face 402 and the second face 502 can limit the movement of the outer side wall 401 and the inner side wall 501 along the first direction X, so as to limit the relative movement between the fixing ring 200 and the pole 300, thereby improving the connection strength between the fixing ring 200 and the pole 300, so as to prolong the service life of the battery.

[0093] It should be noted that the first face 402 and the second face 502 have a plurality of different arrangement modes, and the arrangement modes of the first face 402 and the second face 502 will be illustrated in turn.

[0094] In an embodiment, the first surface 402 is a first plane, and the second surface 502 is a second plane, and the first plane and the second plane are connected.

[0095] In another embodiment, the first surface 402 is a first arc surface, and the second surface 502 is a second arc surface, and the first arc surface and the second arc surface are connected.

[0096] It can be understood that the specific arrangement of the first surface 402 and the second surface 502 is not limited, and can be selected according to actual use requirements, as long as the first surface 402 and the second surface 502 are connected.

[0097] It should be noted that the extension 400 and the limiting cavity 500 have a plurality of different arrangement modes, and the arrangement modes between the extension 400 and the limiting cavity 500 will be illustrated in turn as follows.

[0098] In an embodiment, the extension 400 is provided with a plurality of extensions 400, and the plurality of extensions 400 are arranged at intervals along the thickness direction of the cover plate 100; the limiting cavity 500 is provided with a plurality of limiting cavities 500, and the plurality of limiting cavities 500 are arranged at intervals along the thickness direction of the cover plate 100; at least part of one of the extensions 400 is located in one of the limiting cavities 500.

[0099] It can be understood that the plurality of extensions 400 and the plurality of limiting cavities 500 are arranged in cooperation, which can increase the contact area between the extension 400 and the limiting cavity 500, thereby improving the connection strength between the extension 400 and the limiting cavity 500; the plurality of extensions 400 and the plurality of limiting cavities 500 are respectively arranged along the thickness direction of the cover plate 100, which can increase the connection area between the fixing ring 200 and the pole 300, thereby improving the connection strength of the cover plate assembly, thereby prolonging the service life of the battery.

[0100] In another embodiment, the extension 400 is provided with a plurality of extensions 400, and the plurality of extensions 400 are arranged at intervals along the first direction X; the limiting cavity 500 is provided with a plurality of limiting cavities 500, and the plurality of limiting cavities 500 are arranged at intervals along the first direction X; one of the extensions 400 is connected with one of the limiting cavities 500.

[0101] It can be understood that the plurality of extensions 400 and the plurality of limiting cavities 500 are arranged in cooperation along the first direction X, which can reduce the connection difficulty between the extension 400 and the limiting cavity 500, thereby improving the assembly efficiency between the extension 400 and the limiting cavity 500, to improve the installation efficiency of the cover plate assembly.

[0102] In addition, in other embodiments, the plurality of extending portions 400 are arranged along the first direction X and the height direction of the cover plate 100; the plurality of limiting cavities 500 are arranged along the first direction X and the height direction of the cover plate 100; and at least part of one of the extending portions 400 is arranged in one of the limiting cavities 500.

[0103] It can be understood that the plurality of extending portions 400 and the plurality of limiting cavities 500 are arranged in cooperation, so as to increase the contact area between the extending portions 400 and the limiting cavities 500, thereby improving the connecting strength between the extending portions 400 and the limiting cavities 500; the plurality of extending portions 400 and the plurality of limiting cavities 500 are arranged along the thickness direction of the cover plate 100, so as to increase the connecting area between the fixing ring 200 and the pole 300, thereby improving the connecting strength of the cover plate assembly, and prolonging the service life of the battery; the plurality of extending portions 400 and the plurality of limiting cavities 500 are arranged in cooperation along the first direction X, so as to reduce the connecting difficulty between the extending portions 400 and the limiting cavities 500, thereby improving the assembly efficiency between the extending portions 400 and the limiting cavities 500, and improving the mounting efficiency of the cover plate assembly.

[0104] It can be understood that the arrangement mode of the extending portion 400 and the limiting cavity 500 is not limited, and can be selected according to actual use requirements, as long as one extending portion 400 and one limiting cavity 500 are arranged in cooperation.

[0105] As shown in FIG. 9, the cover plate assembly provided by the embodiment of the application further comprises: one limiting ring 600 arranged on at least one of the pole 300 and the fixing ring 200, and at least part of the limiting ring 600 forms the extending portion 400.

[0106] It can be understood that the limiting ring 600 is used for connecting the pole 300 and the fixing ring 200, so as to improve the connecting strength between the pole 300 and the fixing ring 200, thereby improving the safety factor of the cover plate assembly, and prolonging the service life of the battery.

[0107] It should be noted that the limiting ring 600 has a plurality of different mounting positions, and the mounting positions of the limiting ring 600 will be described in turn.

[0108] In one embodiment, the limiting ring 600 is arranged on the pole 300, the limiting ring 600 is arranged towards the fixing ring 200, the limiting cavity 500 is arranged on the fixing ring 200; at least part of the limiting ring 600 is arranged in the limiting cavity 500, and the part of the limiting ring 600 arranged in the limiting cavity 500 forms the extending portion 400.

[0109] In another embodiment, the limiting ring 600 is arranged on the fixing ring 200, the limiting ring 600 is arranged towards the pole 300, the limiting cavity 500 is arranged on the pole 300; at least part of the limiting ring 600 is arranged in the limiting cavity 500, and the part of the limiting ring 600 arranged in the limiting cavity 500 forms the extension 400.

[0110] In addition, in other embodiments, the limiting ring 600 is provided with two, wherein the first limiting ring 600 is arranged on the pole 300, and the second limiting ring 600 is arranged on the fixing ring 200; the two limiting rings 600 are arranged in cooperation, at least part of the first limiting ring 600 forms the extension 400, and at least part of the second limiting ring 600 forms the limiting cavity 500, and the extension 400 and the limiting cavity 500 are arranged in cooperation.

[0111] In addition, in other embodiments, the limiting ring 600 is provided with two, wherein the first limiting ring 600 is arranged on the pole 300, and the second limiting ring 600 is arranged on the fixing ring 200; the two limiting rings 600 are arranged in cooperation, at least part of the first limiting ring 600 forms the extension 400, and at least part of the second limiting ring 600 forms the limiting cavity 500, and the extension 400 and the limiting cavity 500 are arranged in cooperation.

[0112] It can be understood that the arrangement position of the limiting ring 600 is not limited, and can be selected according to actual use requirements.

[0113] It should be noted that the limiting ring 600 has a plurality of different arrangement materials, and the arrangement materials of the limiting ring 600 will be described in turn.

[0114] In an embodiment, when the limiting ring 600 is arranged on the pole 300, the limiting ring 600 can be a metal ring, and the metal ring is connected to the pole 300.

[0115] It can be understood that the metal ring is connected to the pole 300, which can reduce the connection difficulty between the metal ring and the pole 300; and can improve the connection strength between the metal ring and the pole 300, thereby improving the connection strength between the pole 300 and the fixing ring 200, so as to prolong the service life of the battery.

[0116] In another embodiment, when the limiting ring 600 is arranged on the pole 300, the limiting ring 600 can be an insulating material ring, and the insulating material ring is connected to the fixing ring 200.

[0117] It can be understood that the insulating material ring is connected with the fixing ring 200, which can reduce the connection difficulty between the fixing ring 200 and the insulating material ring, and can improve the connection strength between the fixing ring 200 and the insulating material ring, thereby improving the connection strength between the pole 300 and the fixing ring 200, so as to prolong the service life of the battery.

[0118] It can be understood that the material of the limiting ring 600 is not limited, and can be selected according to actual use requirements.

[0119] It should be noted that in the case of the limiting ring 600 being a metal ring, the metal ring and the pole 300 have a plurality of different connection modes, and the connection modes between the metal ring and the pole 300 will be described in turn.

[0120] In one embodiment, the metal ring and the pole 300 are fixed by welding, and the metal ring and the pole 300 have the advantages of convenient processing and high processing efficiency.

[0121] In another embodiment, the metal ring and the pole 300 are fixed by integral molding, and the metal ring and the pole 300 have the advantage of high connection strength.

[0122] It can be understood that the connection mode between the metal ring and the pole 300 is not limited, and can be selected according to actual use requirements, as long as the metal ring and the pole 300 are fixedly connected.

[0123] It should be noted that in the case of the limiting ring 600 being an insulating material ring, the insulating material ring and the fixing ring 200 have a plurality of different connection modes, and the connection modes between the insulating material ring and the fixing ring 200 will be described in turn.

[0124] In one embodiment, the fixing ring 200 and the insulating material ring are fixed by adhesion, and the fixing ring 200 and the insulating material ring have the advantages of convenient processing and high processing efficiency.

[0125] In another embodiment, the fixing ring 200 and the insulating material ring are fixed by integral molding, and the fixing ring 200 and the insulating material ring have the advantage of high connection strength.

[0126] It can be understood that the specific connection mode between the fixing ring 200 and the insulating material ring is not limited, and can be selected according to actual use requirements, as long as the fixing ring 200 and the insulating material ring are fixedly connected.

[0127] It should be noted that in the case of the limiting ring 600 being a metal ring, the metal ring has a plurality of different setting modes, and the setting modes of the metal ring will be illustrated in turn as follows.

[0128] In one embodiment, the metal ring comprises a first ring 601, the inner circle of the first ring 601 is connected with the pole 300, at least part of the first ring 601 extends towards the side close to the fixed ring 200, and the outer circle of the first ring 601 abuts against the fixed ring 200.

[0129] As shown in FIG. 10, in another embodiment, the metal ring comprises a first ring 601 and a second ring 602, the inner circle of the first ring 601 is connected with the pole 300, the outer circle of the first ring 601 is connected with the second ring 602, and the first ring 601 and the second ring 602 respectively abut against the fixed ring 200.

[0130] It can be understood that the specific setting mode of the metal ring is not limited, and can be selected according to actual use requirements, as long as at least part of the metal ring abuts against the fixed ring.

[0131] As shown in FIG. 11, it should be noted that in the case of the metal ring comprising a first ring 601, the first ring 601 has a first bent surface 6011 and a second bent surface 6012, the first bent surface 6011 and the second bent surface 6012 are connected, and the first bent surface 6011 and the second bent surface 6012 are respectively connected with the fixed ring 200, and the first bent surface 6011 and the second bent surface 6012 are arranged at an included angle.

[0132] It can be understood that the setting of the first bent surface 6011 and the second bent surface 6012 can increase the contact area between the first ring 601 and the fixed ring 200, thereby improving the connection strength between the pole 300 and the fixed ring 200, so as to prolong the service life of the battery.

[0133] It should be noted that in the case of the limiting ring 600 being a metal ring, the fixed ring 200 has a plurality of different setting modes, and the setting modes of the fixed ring 200 will be illustrated in turn as follows.

[0134] In one embodiment, the cover plate assembly provided by the embodiment of the application comprises an insulating stop frame 201 and a to-be-poured fixing member 202, the insulating stop frame 201 is respectively sealedly connected with the cover plate 100 and the pole 300, and the to-be-poured fixing member 202 is poured between the cover plate 100, the pole 300 and the insulating stop frame 201; the to-be-poured fixing member 202 is used for wrapping at least part of the pole 300 and the metal ring, and forming at least part of the fixed ring 200, so as to avoid the direct connection of the pole 300 and the cover plate 100, thereby improving the safety performance of the battery.

[0135] In another embodiment, the outer wall of the fixing ring 200 is connected with the cover plate 100, the inner wall of the fixing ring is connected with the pole 300, and the metal ring is located in the fixing ring 200. It can be understood that the setting mode of the fixing ring 200 is not limited, and can be selected according to actual use requirements, as long as the fixing ring 200 can be insulatedly connected with the cover plate 100 and the pole 300.

[0136] In addition, in other embodiments, the cover plate assembly provided by the embodiments of the application further comprises an insulating stopper 201, which is arranged on the inner plate side of the cover plate 100; that is, the insulating stopper 201 is arranged between the cover plate 100 and the pole 300; the fixing ring 200 comprises a to-be-poured fixing part 202 and a sealing ring 203, the outer peripheral surface of the end of the pole 300 away from the outside is outwardly extended to form a second extension part, the sealing ring 203 is sleeved on the pole 300 and located between the to-be-poured fixing part 202 and the second extension part, and the two side ring surfaces of the sealing ring 203 are respectively in sealing abutting engagement with the to-be-poured fixing part 202 and the ring surface of the second extension part close to the first extension part; that is, the insulating stopper 201 is connected with the cover plate 100, the sealing ring 203 is sealingly connected with the cover plate 101 and the pole 300 respectively, and the to-be-poured fixing part 202 is poured between the cover plate 100 and the pole 300; the sealing ring 203 is used for isolating the direct contact between the pole 300 and the cover plate 100, and can seal and protect the inside of the battery; the to-be-poured fixing part 202 is used for wrapping at least part of the pole 300 and the metal ring, and forming at least part of the fixing ring 200, so as to avoid the direct connection between the pole 300 and the cover plate 100, thereby improving the safety performance of the battery.

[0137] It should be noted that the pole 300 has a plurality of different setting modes, and the setting modes of the pole 300 will be illustrated in turn as follows.

[0138] In one embodiment, the outer peripheral wall of the pole 300 has a first surface 301, and the first surface 301 is coplanarly arranged with the connecting surface of the fixing ring 200 and the pole 300 along the thickness direction of the cover plate 100.

[0139] It can be understood that the coplanar arrangement of the first surface 301 with the connecting surface of the fixing ring 200 and the pole 300 can reduce the installation difficulty between the fixing ring 200 and the pole 300, so as to shorten the processing time of the cover plate, thereby improving the assembly efficiency of the battery.

[0140] In another embodiment, the outer peripheral wall of the pole 300 has a first surface 301, and the first surface 301 is located in the projection of the fixing ring 200 along the projection in the first direction and parallel to the thickness direction of the cover plate 100.

[0141] It can be understood that the cover plate assembly of the structure, the fixing ring 200 can wrap at least the pole 300 to protect the pole 300, thereby improving the connection strength between the fixing ring 200 and the pole 300, prolonging the service life of the cover plate, and thereby prolonging the service life of the battery.

[0142] As shown in FIG. 12, in addition, in another embodiment, the outer peripheral wall of the pole 300 has a first surface 301, a second surface 302 and a third surface 303 connected in sequence, the first surface 301 and the second surface 302 are arranged at an included angle, the first surface 301 and the second surface 302 are respectively connected with the metal ring, and the third surface 303 is connected with the fixing ring 200.

[0143] It can be understood that the first surface 301 and the second surface 302 are used to support the metal ring, so as to reduce the connection difficulty of the metal ring, the second surface 302 can guide the installation of the metal ring, so as to reduce the installation difficulty between the metal ring and the pole 300; the third surface 303 can improve the strength of the second surface 302, so as to improve the connection strength between the pole 300 and the metal ring, thereby prolonging the service life of the battery.

[0144] It can be understood that the specific arrangement mode of the pole 300 is not limited, and can be selected according to actual use requirements.

[0145] It should be noted that when the metal ring includes the first ring 601 and the second ring 602, the first ring 601 and the second ring 602 have a plurality of different arrangement modes, and the arrangement modes between the first ring 601 and the second ring 602 will be described in sequence.

[0146] In one embodiment, at least part of the second ring 602 protrudes from the highest position of the first ring 601 in the thickness direction of the cover plate 100, and the second ring 602 is used to limit the relative movement between the first ring 601 and the fixing ring 200.

[0147] In another embodiment, at least part of the second ring 602 is lower than the lowest position of the first ring 601 in the thickness direction of the cover plate 100, and the second ring 602 is used to limit the relative movement between the first ring 601 and the fixing ring 200.

[0148] It can be understood that the specific arrangement mode between the first ring 601 and the second ring 602 is not limited, and can be selected according to actual use requirements, as long as the second ring 602 is used to limit the relative movement between the first ring 601 and the fixing ring 200.

[0149] It should be noted that the fixing ring 200 provided by the embodiment of the present application is provided in plurality, the plurality of fixing rings 200 are sequentially connected and arranged, and at least part of the plurality of fixing rings 200 extends into the battery shell. The fixing ring 200 is used for insulatingly connecting the pole 300 and the cover plate 100.

[0150] It should be noted that the plurality of fixing rings 200 enclose a connecting cavity, and the cover plate 100 is arranged in the connecting cavity. The connecting cavity is used for accommodating the cover plate 100, so as to improve the connection strength between the cover plate 100 and the fixing ring 200.

[0151] It should be noted that the number of the fixing ring 200 is various, and the number of the fixing ring 200 will be illustrated in sequence as follows.

[0152] In one embodiment, the fixing ring 200 is provided in one, and the one fixing ring 200 insulatingly connects the pole 300 and the cover plate 100. At least part of the one fixing ring 200 forms a connecting cavity, and at least part of the cover plate 100 is located in the connecting cavity.

[0153] In another embodiment, the fixing ring 200 is provided in two, and the two fixing rings 200 are sequentially connected. The two fixing rings 200 are connected with the pole 300 and the cover plate 100 respectively. The two fixing rings 200 enclose a connecting cavity, and at least part of the cover plate 100 is located in the connecting cavity.

[0154] It can be understood that the number of the fixing ring 200 is not limited, and can be selected according to actual use requirements, as long as the fixing ring 200 insulatingly connects the pole 300 and the cover plate 100.

[0155] The embodiment of the present application provides a battery, which comprises a battery shell and the cover plate assembly provided by the above embodiment, and the cover plate assembly is connected to the battery shell.

[0156] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection” and “connection” should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0157] In the present application or the implied device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In the description of the present application, the meaning of “plurality” is two or more, unless otherwise specified and limited.

[0158] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover the embodiments of the application whether or not the embodiments are described with the same term. For example, a reference to a "first" element is a reference to one element first described and is not necessarily a reference to the most preferred or to the most important element, or a reference to the other elements herein described as "second", "third", "fourth" and the like does not mean that these are less preferred or less important than the first element, or that they necessarily follow the first element chronologically, or that they are only used in the context of the first element. Furthermore, the use of the terms "include", "have", "with" and the like are used liberally and are intended to mean the inclusion of the stated elements but not exclusion of any other elements not specifically recited. None of the elements recited in the claims are intended to be impliedly dependent on any other element except where specifically recited.

[0159] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting the present application; although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the technical solutions recorded in the above-mentioned embodiments can be modified or equivalent replacements can be made to some or all of the technical features; and the modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cover assembly, characterized by A battery housing for mounting on a battery, the cover plate assembly comprising: a cover plate (100) for connecting the battery housing; at least one fixing ring (200) mounted on the cover plate (100) and connected to the battery housing through the cover plate (100); a pole (300) at least partially arranged in an inner ring wall of the fixing ring (200); wherein, in the fixing ring (200) and the pole (300), one of them has at least one extension (400), and the other has at least one limiting cavity (500); along a first direction, the extension (400) is at least partially located in the limiting cavity (500), and the limiting cavity (500) is used for limiting the movement of the extension (400); an angle is formed between the thickness direction of the cover plate (100) and the first direction.

2. A cover plate assembly according to claim 1, wherein The extension (400) has an outer side wall (401), and the limiting cavity (500) has an inner side wall (501); along the thickness direction of the cover plate (100), the outer side wall (401) is connected to the inner side wall (501), and the inner side wall (501) is used for limiting the movement of the outer side wall (401) along the thickness direction of the cover plate (100).

3. A cover plate assembly according to claim 2, wherein The outer side wall (401) is formed with a first face (402), and the inner side wall (501) is formed with a second face (502); along the first direction, the first face (402) abuts against the second face (502) to limit the relative movement between the outer side wall (401) and the inner side wall (501).

4. A cover plate assembly according to any one of claims 1-3, characterized in that A plurality of extensions (400) are provided, and the plurality of extensions (400) are arranged at intervals along the thickness direction of the cover plate (100); a plurality of limiting cavities (500) are provided, and the plurality of limiting cavities (500) are arranged at intervals along the thickness direction of the cover plate (100); at least part of one of the extensions (400) corresponds to being located in one of the limiting cavities (500).

5. A cover plate assembly according to any one of claims 1-3, characterized in that A plurality of extensions (400) are provided, and the plurality of extensions (400) are arranged at intervals along the first direction; a plurality of limiting cavities (500) are provided, and the plurality of limiting cavities (500) are arranged at intervals along the first direction; at least part of one of the extensions (400) corresponds to being located in one of the limiting cavities (500).

6. A cover plate assembly according to any one of claims 1-3, wherein, Further comprising: at least one limiting ring (600) is arranged on at least one of the pole (300) and the fixing ring (200), and at least part of the limiting ring (600) forms the extension (400).

7. A cover plate assembly according to claim 6, wherein The limiting ring (600) is provided with two, one of which is arranged on the pole (300), and the other of which is arranged on the fixing ring (200), and the two limiting rings (600) are connected; In the two limiting rings (600), at least part of one limiting ring (600) forms the extension (400), and at least part of the other limiting ring (600) forms the limiting cavity (500).

8. A cover plate assembly according to claim 6, wherein The limiting ring (600) is a metal ring connected to the pole column (300).

9. A cover plate assembly according to claim 8, wherein, The outer peripheral wall of the pole column (300) has a first surface (301) and a second surface (302) connected in sequence, and the first surface (301) and the second surface (302) are arranged at an included angle; At least one of the first surface (301) and the second surface (302) is connected with the metal ring.

10. A cover plate assembly according to any one of claims 1-3, wherein, The fixing ring (200) is provided in plurality, and the plurality of fixing rings (200) are arranged in sequence; At least part of the plurality of fixing rings (200) extends into the battery shell, and the fixing ring (200) is used for insulatingly connecting the pole column (300) and the cover plate (100).

11. A cover plate assembly according to claim 10, wherein: The fixing ring (200) comprises a to-be-poured fixing part (202) and a sealing ring (203); The outer peripheral surface of the end of the pole column (300) away from the outside is formed with a second extension outward in the circumferential direction, the sealing ring (203) is sleeved on the pole column (300) and located between the to-be-poured fixing part (202) and the second extension, and the two side ring surfaces of the sealing ring (203) are respectively in abutting sealing fit with the ring surface of the to-be-poured fixing part (202) and the ring surface of the second extension close to the first extension.

12. A battery, characterized by The battery shell and the cover plate assembly according to any one of claims 1-11 are connected. The battery shell and the cover plate assembly according to any one of claims 1-11 are connected.

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