CN-122003783-A - Battery, battery module and electric equipment

CN122003783ACN 122003783 ACN122003783 ACN 122003783ACN-122003783-A

Abstract

The battery comprises a top cover main body, a pole column, an insulator and a sealing ring, wherein a mounting hole is formed in the top cover main body, the pole column comprises a base plate and a column body which are connected, the base plate is located on one side of the top cover main body, the column body penetrates through the mounting hole, at least part of the insulator is arranged on the other side of the top cover main body, the insulator is annularly arranged on the periphery of the column body and fixes the pole column to the top cover main body, an extension part is formed on one side, facing the base plate, of the insulator, the extension part is located between the wall of the mounting hole and the column body, the sealing ring is located between the top cover main body and the base plate and annularly arranged on the periphery of the column body, and the sealing ring and the extension part are at least partially overlapped in the axial direction of the column body.

Inventors

SU HUASHENG
YANG XIAO
LI CAN
YANG RUI
ZHENG YULIAN
WANG PENG
JIN HAIZU

Assignees

宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241009
Priority Date: 20240204

Claims (12)

A battery, wherein the battery comprises: the top cover main body is provided with a mounting hole; The pole comprises a base plate and a column part which are connected, the base plate is positioned on one side of the top cover main body, and the column part is penetrated in the mounting hole; an insulator disposed at least partially on the other side of the cap body, surrounding the circumference of the column portion and fixing the pole to the cap body, an extension portion formed on one side of the insulator facing the substrate and located between the wall of the mounting hole and the column portion, and The sealing ring is positioned between the top cover main body and the base plate, is arranged on the periphery of the column part in a surrounding mode, and is at least partially overlapped with the extension part in the axial direction of the column part.
The battery according to claim 1, wherein a reinforcing portion protruding toward one side of the insulator projects into the mounting hole and overlaps the extension portion in the axial direction of the cylindrical portion.
The battery according to claim 2, wherein the reinforcing portion is located between the extension portion and the column portion, and abuts a peripheral side of the column portion.
The battery according to claim 3, wherein the reinforcing portion is annular and is attached to the circumferential side of the cylindrical portion, and the extension portion is annular and is disposed around the hole wall of the mounting hole and the reinforcing portion; And/or, the longitudinal section of the reinforcing part is rectangular.
The battery according to any one of claims 2 to 4, wherein a ratio of an overlapping height of the reinforcing portion and the extension portion to a depth of the mounting hole in an axial direction of the cylindrical portion is at least 1/4 and not more than 3/4.
The battery according to any one of claims 2 to 5, wherein the reinforcing portion satisfies one of the following conditions: The height of the reinforcement portion is at least 0.8mm and not more than 1.2mm in the axial direction of the cylindrical portion, or The ratio of the thickness of the reinforcing part to the distance between the cylindrical part and the wall of the mounting hole is at least 1/2 and not more than 2/3 in the radial direction of the cylindrical part, or The thickness value of the reinforcing portion in the radial direction of the cylindrical portion is at least 0.5mm and not more than 0.7mm.
The battery according to any one of claims 2 to 6, wherein the reinforcing portion is formed with a first step surface and a second step surface disposed at an angle away from the outer side of the cylindrical portion, the extending portion is formed with a third step surface and a fourth step surface disposed at an angle on the inner side thereof, the first step surface is fitted to the third step surface, and the second step surface is fitted to the fourth step surface.
The battery according to any one of claims 1 to 7, wherein a central portion of an outer peripheral side of the cylindrical portion is concavely formed with a groove, and an inner peripheral side of the insulator is formed with a convex ring, the convex ring being caught in the groove.
The battery according to claim 8, wherein the maximum outer diameter of the cylindrical portion is smaller than the aperture of the mounting hole, the outer diameter of the base plate is larger than the aperture of the mounting hole, the insulator is formed on the top cover main body by an injection molding process, and the extension portion protruding into the mounting hole and the convex ring protruding into the groove are formed by an injection molding process.
The battery of any one of claims 1 to 9, wherein the top cap body is provided with a positioning ring protruding away from the substrate surface, the insulator being formed with a positioning groove, the positioning ring being confined within the positioning groove.
A battery module, wherein the battery module comprises the battery according to any one of claims 1 to 10.
A powered device, wherein the powered device comprises the battery module of claim 11.

Description

Battery, battery module and electric equipment The present application claims priority from chinese patent application number 202420275288.2 filed on line 04 of 2024, 02 and 04, the entire contents of which are incorporated herein by reference. Technical Field The application relates to the technical field of batteries, in particular to a battery, a battery module and electric equipment. Background The power battery generally comprises a battery core and a metal shell configured to contain the battery core, the metal shell generally comprises a shell body and a top cover which are connected, the battery core is positioned in the shell body, the top cover is covered at an opening of the shell body, the inside of the battery needs to be sealed, the leakage of the inside of the battery is prevented, the service life of the battery is ensured, and meanwhile, the safety of the battery is ensured, so that the performance of the battery is directly influenced by the quality of the top cover. The top cap has generally seted up the mounting hole, and the utmost point post passes the mounting hole and exposes outside, in order to improve the leakproofness and the insulativity of battery, generally forms the insulator that is located between utmost point post and the top cap surface through moulding plastics to set up the sealing washer and seal between utmost point post and top cap lower surface, the insulator can be through mounting hole butt sealing washer. However, the existing sealing ring is generally planar and sleeved on the periphery of the pole, so that the sealing ring is in flat contact with the insulator, the creepage distance between the pole and the top cover main body is relatively short, and the project with high voltage requirement cannot be met. Content of the application The application mainly aims to provide a battery, which aims to increase the creepage distance between a top cover main body and a pole in the battery. To achieve the above object, the present application provides a battery comprising: the top cover main body is provided with a mounting hole; The pole comprises a base plate and a column part which are connected, the base plate is positioned on one side of the top cover main body, and the column part is penetrated in the mounting hole; an insulator disposed at least partially on the other side of the cap body, surrounding the circumference of the column portion and fixing the pole to the cap body, an extension portion formed on one side of the insulator facing the substrate and located between the wall of the mounting hole and the column portion, and The sealing ring is positioned between the top cover main body and the base plate, is arranged on the periphery of the column part in a surrounding mode, and is at least partially overlapped with the extension part in the axial direction of the column part. The top cover main body seals the opening of the shell, the column part of the pole column is arranged in the mounting hole and is electrically connected with the inside through the base plate, and the sealing ring is arranged on the periphery of the column part and is positioned between the top cover main body and the base plate, so that the inside of the shell can be sealed, and liquid leakage is prevented. Here, the insulator is the structure through moulding plastics formation, through with the extension of sealing washer and insulator at least partly overlap in the axial of cylinder portion, then can increase sealing washer and extension in the ascending butt area of vertical to do not reduce both in the area of contact of horizontal, thereby can increase the creepage distance between post and the top cap main part, prevent the short circuit, make battery top cap structure can be applied to the project of high voltage demand. In an embodiment of the present application, a reinforcing portion is protruding from a side of the seal ring facing the insulator, and the reinforcing portion extends into the mounting hole and overlaps the extension portion in an axial direction of the column portion. Here, add the enhancement portion with the sealing washer to stretch into in the mounting hole, overlap with extension in vertical direction and set up, thereby can also strengthen the intensity of sealing washer when increasing creepage distance, and reduce because of the fluid force in the injection molding process and take place the skew, guarantee the stability of sealing washer in the injection molding process. In an embodiment of the application, the reinforcement portion is located between the extension portion and the column portion and abuts against a peripheral side of the column portion. Here, set up the reinforcing part in the one side that the sealing washer is close to the cylinder portion to can increase the area of contact with the cylinder portion, promote the connection stability with the cylinder portion, further reduce the dislocation removal of sealing washer in the inje