WO-2026090799-A1 - BATTERY CELL, BATTERY APPARATUS AND ELECTRICAL APPARATUS

WO2026090799A1WO 2026090799 A1WO2026090799 A1WO 2026090799A1WO-2026090799-A1

Abstract

A battery cell (20), a battery apparatus and an electrical apparatus. The battery cell comprises: a casing component (21), comprising a first wall which is provided with mounting holes; an electrode component (22), accommodated in the casing component; and post components (23), which are mounted at the mounting holes. Each post component comprises a post body (231), an adapter structure and an insulating sealing structure (233), the adapter structure being arranged around the circumference of the post body and connected to the first wall, the insulating sealing structure being fitted between the post body and the adapter structure, and the adapter structure comprising a connection arm (2321), a cantilever (2322) and a transverse arm (2323); each post body comprises a main body portion (2311) and a skirt portion (2312), the skirt portion being arranged around the circumference of the main body portion and being bent in a direction towards the cantilever; and in the thickness direction of the first wall, each cantilever and a transverse arm clamp a skirt portion by means of an insulating sealing structure.

Inventors

HUANG, Biao
CHEN, Congsheng
LIN, Wenfa
DONG, Ziyan
HU, Yuanren

Assignees

宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260507
Application Date: 20241028

Claims (20)

A battery cell, comprising: The housing component includes a first wall, the first wall being provided with mounting holes; The electrode components are housed within the housing components; An electrode component is installed at the mounting hole and includes an electrode body, a connecting structure, and an insulating sealing structure. The electrode body is connected to the electrode component. The connecting structure is circumferentially arranged around the electrode body and connected to the first wall. The insulating sealing structure is insulating and sealingly fitted between the electrode body and the connecting structure. The adapter structure includes a connecting arm and a cantilever and a cross arm connected to both ends of the connecting arm, with the cantilever being farther away from the first wall relative to the cross arm; the pole body includes a connected main body and a skirt, with the skirt circumferentially surrounding the main body and bent toward the cantilever; along the thickness direction of the first wall, the cantilever and the cross arm clamp the skirt through the insulating sealing structure.
According to claim 1, the battery cell includes a first section and a second section, the first section being connected to the main body, and the second section being connected to the end of the first section away from the main body and bent toward the cantilever relative to the first section.
According to claim 1, the battery cell has at least two bending angles formed on the skirt portion.
According to claim 3, the battery cell, wherein the skirt portion includes a first section, a second section and a third section, the first section connects to the main body portion, the second section connects the first section and the third section and bends relative to the first section toward the cantilever, and the third section bends relative to the second section toward the first wall.
According to claim 2 or 4, the battery cell is wherein the first section is perpendicular to the main body portion.
The battery cell according to any one of claims 2, 4, and 5, wherein the thickness of the second segment is H1 along the thickness direction of the first wall, and the length of the second segment is L1 along the thickness direction of the connecting arm, wherein H1 and L1 satisfy the following formula: y＝-(P·L 1 4 )/8E(b·H 1 3 /12) Where y is the deflection of the second section, which should be less than 25% of the compression of the insulating sealing structure, in mm; P is the maximum rebound force of the insulating and sealing structure after compression, in N; E is the elastic modulus of the second section, in GPa. b is the circumference of the second section in the circumferential direction of the pole body, in mm.
The battery cell according to any one of claims 2, 4 to 6, wherein the included angle between the first segment and the second segment is θ1, wherein 90 degrees ≤ θ1 < 180 degrees.
According to claim 7, the battery cell is wherein 125 degrees ≤ θ1 ≤ 145 degrees.
According to claim 4, the included angle between the second segment and the third segment is θ2, wherein 90 degrees ≤ θ2 < 180 degrees.
According to claim 9, the battery cell is wherein 125 degrees ≤ θ2 ≤ 145 degrees.
According to any one of claims 1 to 10, the battery cell has an outer wall surface away from the electrode component, and along the thickness direction of the first wall, the connecting arm has a first projection on the plane where the outer wall surface is located, and the cantilever has a second projection on the plane where the outer wall surface is located, wherein the size of the first projection is smaller than the size of the second projection in the thickness direction of the connecting arm.
The battery cell according to any one of claims 1 to 11, wherein the connecting arm is perpendicular to the first wall.
The battery cell according to any one of claims 1 to 12, wherein the cantilever includes a root and a beam, the beam being connected to the connecting arm via the root with a rounded transition; the insulating sealing structure includes a seal, the seal being at least partially insulating and sealingly fitted between the cross arm and the skirt.
According to claim 13, the battery cell is provided with the beam portion inclined or bent relative to the root portion toward the first wall.
According to claim 14, the included angle between the root and the beam is θ3, wherein 90 degrees ≤ θ3 < 180 degrees.
According to claim 15, the battery cell is wherein 125 degrees ≤ θ3 ≤ 145 degrees.
The battery cell according to any one of claims 1 to 12, wherein the cantilever includes a root and a beam, the root being arc-shaped and connecting the connecting arm and the beam; the insulating sealing structure seal is at least partially insulating and sealingly fitted between the cross arm and the skirt.
According to the battery cell of claim 17, the beam portion is inclined or bent relative to the root portion in a direction close to the first wall, and the included angle between the beam portion and the connecting arm is θ4, wherein θ4 < 90 degrees.
According to claim 18, the battery cell is wherein 45 degrees ≤ θ4 < 90 degrees.
The battery cell according to any one of claims 1 to 12, wherein the cantilever comprises a root, a beam, and a bend, the beam being connected to the connecting arm via the root in an arc transition, and the bend being disposed at the end of the beam away from the root and in a direction close to the first wall. Bending; the insulating sealing structure includes a seal that is at least partially insulating and sealingly fitted between the crossarm and the skirt portion.

Description

Battery cells, battery packs and electrical devices Technical Field This application relates to the field of battery technology, and in particular to a battery cell, a battery device, and an electrical device. Background Technology A battery pack typically consists of a housing and multiple battery cells housed within it. The battery cell, as the core component of the battery pack, has stringent requirements regarding both safety and lifespan. To ensure stability within the battery cell, its casing needs to maintain a high degree of airtightness with the external environment. Therefore, further improving the airtightness between the battery cell's internal structure and its external environment has become one of the problems that needs to be solved. Summary of the Invention This application provides a battery cell, a battery device, and an electrical device, which can effectively improve the reliability of the battery cell and the battery device. In a first aspect, embodiments of this application provide a battery cell, comprising: a housing component including a first wall having a mounting hole; an electrode component housed within the housing component; and a terminal component mounted at the mounting hole, comprising a terminal body, a connecting structure, and an insulating sealing structure. The terminal body is connected to the electrode component, the connecting structure is circumferentially arranged around the terminal body and connected to the first wall, and the insulating sealing structure is insulatingly and sealingly fitted between the terminal body and the connecting structure. The connecting structure includes a connecting arm and cantilevered arms and cross arms connected to both ends of the connecting arm, with the cantilevered arms being farther from the first wall than the cross arms. The terminal body includes a connected main body and a skirt portion, the skirt portion being circumferentially arranged around the main body and bent towards the cantilevered arms. Along the thickness direction of the first wall, the cantilevered arms and cross arms clamp the skirt portion via the insulating sealing structure. In the above technical solution, the cantilever and crossarm of the adapter structure can be clamped onto the skirt of the electrode body by the insulating and sealing structure. Simultaneously, because the skirt bends towards the cantilever, it further compresses the insulating and sealing structure, making the connection between the insulating and sealing structure and the electrode body and adapter structure tighter. This improves the insulation and sealing performance of the adapter structure and the skirt, thus enhancing the reliability of the battery cell. Because the skirt bends towards the cantilever, when the skirt is under stress, the bending structure resists deformation and distributes the force to different parts, giving the skirt high strength and making it less prone to deformation. This improves the reliability of the structure formed by the electrode body and the adapter structure, reduces the probability of the skirt detaching from the adapter structure due to deformation, and further improves the stability of the insulating and sealing structure between the electrode body and the adapter structure. This also reduces the risk of insulation and sealing failure, and similarly improves the reliability of the battery cell. In some embodiments of this application, the skirt portion includes a first section and a second section, the first section being connected to the main body portion, and the second section being connected to the end of the first section away from the main body portion and bent relative to the first section toward the cantilever. In the above technical solution, the skirt portion forms a bent structure from a certain position. This allows the second section to form a reinforcing structure near the first section and provides a counter-bending moment in the direction away from the first wall, thereby enhancing the overall resistance of the skirt portion to bending deformation. The skirt portion with this structure has a simple bending method and good manufacturability. In some embodiments of this application, at least two bends are formed on the skirt edge. In the above technical solution, the above structure can increase the number of bending positions of the skirt, further improve the strength of the skirt, and enhance the bending and torsional resistance of the skirt. This can further reduce the probability of the skirt bending and deforming when the electrode body is subjected to a force away from the first wall, thus preventing the electrode body from detaching from the transfer structure. This can further improve the stability of the structure formed by the electrode body and the transfer structure, improve the reliability of the insulation and sealing structure, and thus improve the reliability of the battery cell. In some embodiments of this app