Battery pole piece and cell

Abstract

Embodiments of the invention relate to a battery pole piece and a cell. The battery pole piece according to an embodiment comprises a pole piece body having a length direction and a width direction perpendicular to the length direction, and a plurality of tabs connected to the pole piece body, wherein each of the plurality of tabs has a width in the width direction, and a length in the length direction, wherein the widths or lengths of the tabs are different. According to the battery pole piece and the cell provided by the embodiments of the invention, the battery safety performance is improved, the battery weight can be reduced, and it is guaranteed that each tab in the battery pole piece can be electrically communicated with the outside well.

Description

technical field

[0001] The embodiments of the present application relate to the field of batteries, in particular to battery pole pieces and battery cells. Background technique

[0002] Lithium-ion batteries have been widely used in various electronic products and electric vehicles due to their advantages such as large specific energy, high working voltage, low self-discharge rate, small size and light weight. As the market's requirements for battery safety performance continue to increase, it is not only necessary to ensure that the battery has no potential safety hazards during normal use, but also to ensure that the battery does not ignite, burn or explode after being subjected to various damages such as violent impacts and punctures. .

[0003] Traditional lithium-ion batteries usually use metal foils such as copper foil, aluminum foil, and nickel foil to make current collectors for electronic conduction. However, the safety performance of this lithium-ion battery is n...

Images