阅读说明：本技术 电池单元及电子设备 (Battery unit and electronic device ) 是由 闫东阳 于 2020-02-13 设计创作，主要内容包括：本申请是关于电池单元及电子设备。根据一实施例的电池单元包括：电极组件及壳体。电极组件具有在电池单元的厚度方向上的厚度T1。壳体收容电极组件,且具有在厚度方向上的厚度T2。壳体包括第一表面及第二表面；呈圆弧形的第一侧边,与第二表面相连,其半径为R；第三表面,与第一侧边相连,围封电极组件的侧面的至少一部分；第二侧边,包括以第一表面的第一边缘处和第三表面的第二边缘处为起点朝向远离电极组件的方向延伸的第一部分,及朝向靠近电极组件的方向延伸的第二部分,其具有连接至第三表面的尾端边缘,第三表面的第二边缘在厚度方向上的所处的平面与尾端边缘在厚度方向上的所处的平面之间沿厚度方向具有长度Z,且(T2-Z)/2≤R≤T1/2+0.3mm。(The present application relates to a battery unit and an electronic device. A battery cell according to an embodiment includes: an electrode assembly and a case. The electrode assembly has a thickness T1 in the thickness direction of the battery cell. The case houses the electrode assembly and has a thickness T2 in the thickness direction. The shell comprises a first surface and a second surface; the first side edge in the shape of an arc is connected with the second surface, and the radius of the first side edge is R; a third surface connected to the first side edge, enclosing at least a portion of a side surface of the electrode assembly; and a second side including a first portion extending from the first edge of the first surface and the second edge of the third surface toward a direction away from the electrode assembly, and a second portion extending toward a direction close to the electrode assembly, and having a trailing edge connected to the third surface, the second edge of the third surface having a length Z in the thickness direction between a plane in which the second edge is located in the thickness direction and a plane in which the trailing edge is located in the thickness direction, and (T2-Z)/2 ≦ R ≦ T1/2+0.3 mm.)

A battery cell, comprising:

an electrode assembly having a thickness T1 in a thickness direction of the battery cell; and

a case that houses the electrode assembly, the case having a thickness T2 in the thickness direction, the case including:

a first surface, and a second surface opposite the first surface;

a first arc-shaped side edge connected to the second surface, the first side edge having a radius of R;

a third surface connected to the first side and enclosing at least a portion of a side of the electrode assembly;

a second side including a first portion extending from a first edge of the first surface and a second edge of the third surface toward a direction away from the electrode assembly, and a second portion extending toward a direction approaching the electrode assembly, and the second portion having a trailing edge connected to the third surface, and the second edge of the third surface having a length Z in the thickness direction between a plane on which the second edge is located in the thickness direction and a plane on which the trailing edge is located in the thickness direction, and (T2-Z)/2 ≦ R ≦ T1/2+0.3 mm.

The battery cell according to claim 1, wherein a maximum distance between the second side edge and the electrode assembly adjacent to the second side edge in a width direction of the battery cell perpendicular to the thickness direction is D, 0.3mm < D <0.9 mm.

The battery cell according to claim 2, wherein the length Z is not greater than a height H in the thickness direction of a fan-shaped region S by a radius R of the first side, the height H being measured from a plane in which a second edge of the third surface is located in the thickness direction to a lowest position in the thickness direction of the fan-shaped region S.

The battery cell according to claim 3, characterized in that the length Z ranges from Z <0.8 XT 2.

The battery cell according to claim 4, characterized in that the length Z ranges from 0.2 XT 2< Z.

The battery cell of claim 1, wherein the difference between the thickness T2 of the case and the thickness T1 of the electrode assembly is in the range of 0< T2-T1<0.2 mm.

The battery cell as recited in claim 1 wherein the second side is a first fold or a second fold, at least a portion of the second portion being sealingly engaged with the third surface of the housing.

The battery cell according to claim 1, wherein the electrode assembly is formed by winding a first pole piece and a second pole piece which are arranged at intervals, and a separation film is arranged between the first pole piece and the second pole piece.

The battery cell of claim 8, further comprising an electrolyte within the housing.

An electronic device comprising one or more battery cells according to any one of claims 1-9.