The present application is a National Stage application of PCT international application: PCT/CN2020/073587 which claims the benefit of priority from the Chinese Patent Application No. 201910143584.0 filed on 26 Feb. 2019, the disclosure of which is hereby incorporated by reference in its entirety.

BACKGROUND

1. Technical Field

Embodiments of the present application relate to the field of batteries, and particularly to battery cells and electronic devices.

2. Description of the Related Art

Batteries have been widely used in various fields such as electronic products, electric vehicles and the like. However, during the actual use of the battery, there are many reasons that cause the battery shell to be recessed inward to touch the battery electrodes of the battery, such that the battery shell is affected by the battery electrodes to cause severe wear or even cracking, which causes electrochemical corrosion of the battery shell, thereby causing various types of potential safety hazards such as battery cracking, electrolyte leakage and the like.

Therefore, regarding how to improve the safety performance of batteries, there are still a lot of technical problems in the industry that need to be solved urgently.

SUMMARY

One of the objectives of the embodiments of the present application is to provide a battery cell and an electronic device, which can ensure a high space utilization ratio and energy density of a battery while improving safety performance of the battery.

A battery cell provided according to an embodiment of the present application includes: an electrode assembly, the electrode assembly including an electrode plate and a shell. The shell receives the electrode assembly and includes a first edge seal, a second edge seal, and a circular edge seal connecting the first edge seal and the second edge seal, wherein the circular edge seal defines a virtual circular arc region with a radius R and a radian angle Ø. The electrode plate has a first edge, a second edge, and a third edge connecting the first edge and the second edge, and a virtual extension line of the first edge and a virtual extension line of the second edge intersect to form a virtual intersection point A. A point on the third edge has a minimum distance L relative to the virtual intersection point A. The virtual extension line of the first edge and the virtual extension line of the second edge form a corner at the virtual intersection point A toward the third edge, and an angle of the corner is greater than 0 degrees and less than 180 degrees.

In some embodiments of the present application, the virtual intersection point A is located in the virtual circular arc region, and the minimum distance L is

(R-D⁢1)2+(R-D⁢2)22,
wherein D1is a vertical distance from the first edge to the first edge seal, and D2is a vertical distance from the second edge to the second edge seal.

In some embodiments of the present application, the virtual intersection point A is located outside the virtual circular arc region, a vertical distance from the first edge to the first edge seal is D1, and a vertical distance from the second edge to the second edge seal is D2. A minimum distance from the virtual intersection point A to the third edge is L2, and L2is equal to the smaller one of D1and D2.

In some embodiments of the present application, the third edge includes a circular arc, a straight line or an irregular curve.

In some embodiments of the present application, the third edge is a circular arc with a radius greater than R, and the third edge is convex toward the circular edge seal.

In some embodiments of the present application, an angle of the radian angle Ø is greater than or equal to 0 degrees and less than or equal to 180 degrees.

In some embodiments of the present application, an angle of the radian angle Ø is greater than or equal to 0 degrees and less than or equal to 90 degrees.

In some embodiments of the present application, the electrode plate includes a first electrode plate and a second electrode plate. A separator is disposed between the first electrode plate and the second electrode plate.

In some embodiments of the present application, the separator is configured to fit a shape of the electrode plate, and the separator extends beyond edges of the electrode plate.

In some embodiments of the present application, the shell includes a first surface and a second surface opposite the first surface, and the first surface nears the first edge seal, the second edge seal and the circular edge seal relative to the second surface, wherein an area of the first electrode plate projected on the first surface is greater than an area of the second electrode plate projected on the first surface, wherein the first electrode plate nears the first surface relative to the second electrode plate.

An electronic device provided according to another embodiment of the present application includes a battery cell. The battery cell includes: an electrode assembly, the electrode assembly including an electrode plate and a shell. The shell receives the electrode assembly and includes a first edge seal, a second edge seal, and a circular edge seal connecting the first edge seal and the second edge seal, wherein the circular edge seal defines a virtual circular arc region with a radius R and a radian angle Ø. The electrode plate has a first edge, a second edge, and a third edge connecting the first edge and the second edge, and a virtual extension line of the first edge and a virtual extension line of the second edge intersect to form a virtual intersection point A. A point on the third edge has a minimum distance L relative to the virtual intersection point A. The virtual extension line of the first edge and the virtual extension line of the second edge form a corner at the virtual intersection point A toward the third edge, and an angle of the corner is greater than 0 degrees and less than 180 degrees.

The battery cell and the electronic device provided by the embodiments of the present application can ensure a high space utilization ratio and energy density while having high safety performance.

