WO-2026090794-A1 - BATTERY CELL, BATTERY DEVICE, AND ELECTRIC DEVICE

WO2026090794A1WO 2026090794 A1WO2026090794 A1WO 2026090794A1WO-2026090794-A1

Abstract

A battery cell, a battery device, and an electric device, relating to the technical field of batteries. The battery cell comprises a casing, an electrode component, and a pole component. The electrode component is arranged in the casing. The casing comprises a first casing wall. The pole component is arranged on the first casing wall and comprises a pole and a clamping structure; the pole is connected to the electrode component, and the clamping structure is connected to the first casing structure; the clamping structure surrounds the pole and is insulated from and in sealing fit with the pole by means of an insulating sealing structure; the clamping structure comprises a first clamping member and a second clamping member connected to each other; the first clamping member is bent toward the pole, and forms, together with the second clamping member, a clamping slot for clamping the pole; the first clamping member comprises first clamping portions bent toward the pole; the number of first clamping portions is greater than one and the first clamping portions are arranged circumferentially along the pole; and a gap is formed between at least two adjacent first clamping portions.

Inventors

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

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 includes a housing, an electrode component, and a terminal component. The electrode component is disposed within the housing. The housing includes a first housing wall. The terminal component is disposed within the first housing wall and includes: The electrode post is connected to the electrode component; A clamping structure is connected to the first shell wall. The clamping structure surrounds the pole post and is insulated from and sealed to the pole post through an insulating and sealing structure. The clamping structure includes a first clamping member and a second clamping member connected together. The first clamping member is bent toward the pole post and forms a clamping groove with the second clamping member to clamp the pole post together. The first clamping member includes a first clamping portion that bends toward the pole post. There are multiple first clamping portions arranged circumferentially along the pole post, and at least two adjacent first clamping portions form an interruption.
According to claim 1, the battery cell is provided with a plurality of first clamping portions spaced apart circumferentially along the electrode post, such that the interruption is formed between each pair of adjacent first clamping portions, and the interruption is provided with a plurality of interruptions spaced apart circumferentially along the electrode post.
According to claim 2, the battery cell is a circular structure, and the plurality of discontinuities are evenly spaced along the circumference of the electrode.
According to claim 2, the battery cell is a long strip structure, and the first clamping part is distributed at both ends of the length and both sides of the width of the electrode.
According to claim 4, the battery cell is a racetrack-shaped structure, which is composed of a rectangle and two arcs located at both ends of the length of the rectangle, and the discontinuity is arranged corresponding to the connection position of the rectangle and the arcs.
The battery cell according to any one of claims 1 to 5, wherein the end of the discontinuity near the connection position between the first clamping member and the second clamping member is a closed end, the end of the discontinuity penetrating the first clamping member and away from the connection position is an open end, and the width of the discontinuity at the open end position is greater than the width of the discontinuity at the closed end position.
According to claim 6, the width of the discontinuity gradually increases along the direction from the closed end to the open end.
The battery cell according to any one of claims 1 to 5, wherein the first clamping member includes a surrounding portion connected between the first clamping portion and the second clamping member, the surrounding portion extending in the inward and outward directions of the first shell wall and extending around the circumference of the electrode post, the first clamping portion and the surrounding portion being integral, and the first clamping portion extending in a direction closer to the central axis of the electrode post relative to the surrounding portion, the discontinuity extending from the connection point of the surrounding portion and the first clamping portion in a direction away from the surrounding portion to penetrate the first clamping member.
The battery cell according to any one of claims 1 to 5, wherein the first clamping portion has a reinforcing rib protruding in a direction away from the electrode post.
According to claim 9, the battery cell, in the direction surrounding the pole post along the first clamping member, the reinforcing rib is located at the center of the first clamping portion, and the reinforcing rib extends along the bending trajectory of the first clamping portion.
The battery cell according to any one of claims 1 to 10, wherein the first clamping member and the second clamping member are an integral piece.
According to claim 11, the battery cell is wherein the second clamping member is a preformed part and is connected to the first shell wall, and the first clamping member is a riveted part.
According to the battery cell of claim 12, the second clamping member includes a second clamping portion, the second clamping portion cooperating with the first clamping portion to define the clamping groove, and the second clamping portion having a stepped structure protruding in a direction away from the first clamping portion.
The battery cell according to any one of claims 1 to 13, wherein the clamping structure includes an adapter body, the adapter body being integral with at least one of the first clamping member and the second clamping member, and the adapter body being integral with the first shell wall.
The battery cell according to any one of claims 1 to 13, wherein the clamping structure includes an adapter body, the adapter body being integral with at least one of the first clamping member and the second clamping member, and the adapter body being assembled and connected to the first shell wall.
The battery cell according to any one of claims 1 to 15, wherein the first clamping member is disposed on the side of the second clamping member away from the electrode component; The insulating and sealing structure includes: A seal, at least a portion of which is clamped between the pole and the second clamping member.
According to the battery cell of claim 16, the second clamping member includes a second clamping portion that cooperates with the first clamping portion to form the clamping groove, the second clamping portion includes an end portion and a root portion, the end portion being disposed away from the first shell wall relative to the root portion, and at least a portion of the seal is clamped between the root portion and the terminal post.
According to claim 17, the battery cell further includes the seal clamped between the end and the terminal post.
According to the battery cell of claim 17 or 18, the seal is further clamped between the first clamp and the terminal post, such that at least a portion of the seal is located between the connection point of the first clamp and the second clamp and the terminal post.
The battery cell according to any one of claims 16 to 19, wherein the seal is an integral part and further includes a portion clamped between the first clamping portion and the terminal post.

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, battery device, and power supply device. Background Technology In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. The power battery comprises several individual battery cells; however, the reliability of these individual cells needs improvement. Application content This application provides a battery cell, a battery device, and an electrical device, which helps to improve the reliability of the battery cell. In a first aspect, embodiments of this application provide a battery cell, including a housing, an electrode component, and a terminal component. The electrode component is disposed within the housing, and the housing includes a first housing wall. The terminal component is disposed on the first housing wall and includes a terminal and a clamping structure. The terminal is connected to the electrode component, and the clamping structure is connected to the first housing wall. The clamping structure surrounds the terminal and is insulated from and sealed to the terminal through an insulating and sealing structure. The clamping structure includes a first clamping member and a second clamping member connected together. The first clamping member is bent toward the terminal and forms a clamping groove with the second clamping member to clamp the terminal. The first clamping member includes a first clamping portion bent toward the terminal. There are multiple first clamping portions arranged circumferentially along the terminal, and at least two adjacent first clamping portions form an interruption. In the above technical solution, since an interruption is formed between at least two adjacent first clamping parts, it means that during the bending process, the at least two adjacent first clamping parts can extend into the pre-formed groove used to transform into an interruption. This allows the two first clamping parts to avoid stacking and wrinkling after bending, instead jointly defining the interruption, thereby improving the redundancy problems such as material accumulation and wrinkles that exist after bending the first clamping part. Because the redundancy problems such as material accumulation and wrinkles caused by bending of the clamping structure are improved, the reliability of the electrode being clamped by the clamping structure is enhanced, increasing the electrode's resistance to internal and external pressure, thus improving the reliability of the battery cell. Furthermore, it makes it less likely for gaps to appear at the electrical connection points between the electrode and the electrode components and/or the busbar components, thereby improving the problems of increased contact resistance, temperature rise, and reduced conductive area caused by gaps. This further improves the operational reliability of the battery cell and helps ensure power supply efficiency and power supply requirements. Furthermore, when the first clamping member is located outside the housing and needs to be covered with insulating material, the redundant problems such as material accumulation and wrinkles caused by bending of the first clamping member are improved. This can improve the comprehensiveness of the first clamping member being covered by insulating material, thereby reducing the probability of short circuit connection between the housing and the busbar component, and thus improving the reliability of the battery cell. In some embodiments, a plurality of first clamping portions are arranged at intervals along the circumference of the pole post, such that an interruption is formed between each pair of adjacent first clamping portions, and the interruption is a plurality of portions arranged at intervals along the circumference of the pole post. In the above technical solution, by setting multiple interruptions and spacing them along the direction of the clamping structure around the pole, more space is reserved to allow the bent first clamping part to stretch out, thereby better solving the redundant problems such as material accumulation and wrinkles caused by the bending of the clamping structure. In some embodiments, the pole post is a circular structure, and multiple discontinuities are evenly spaced along the circumference of the pole post. In the above technical solution, because multiple discontinuities are evenly spaced along the circumference of the pole post, multiple first clamping parts can also be evenly spaced along the circumference of the pole post. This ensures that the multiple first clamping parts are subjected to uniform force, thereby more reliably clamping the pole post and improving the reliability of the pole post clamping. Furthermore, the multiple first clamping parts also ensure that t