Rechargeable battery

摘要

A rechargeable battery includes: an electrode assembly formed by winding a positive and negative electrode plate and a separator between the electrode plates, and including a cavity along an axial direction of the electrode assembly; a center pin along the axial direction and housed in the cavity; a can having an opening; and a cap assembly configured to close the opening, wherein the center pin includes: a center portion along a radial direction of the center pin; a first perimeter portion coupled to a first end portion of the center portion and extending from the first end portion toward a second end portion of the center portion; and a second perimeter portion coupled to the first end portion of the center portion and extending from the first end portion toward the second end portion in a circumferential direction opposite to a circumferential direction of the first perimeter portion.

主权项

1. A rechargeable battery comprising:
an electrode assembly formed by winding a positive electrode plate, a negative electrode plate, and a separator between the positive electrode plate and the negative electrode plate, and defining a cavity extending along an axial direction of the electrode assembly; a single metal plate shaped to comprise a center pin extending along the axial direction and housed in the cavity; a can having an opening in which the electrode assembly and the center pin are received; and a cap assembly configured to close the opening, wherein the center pin comprises:
a center portion extending along a radial direction of the center pin, and comprising a second end portion whereat the single metal plate is folded in half along the axial direction;a first perimeter portion bent at a first side of a first end portion of the center portion, the first end portion being opposite to the second end portion, and the first perimeter portion being curved to extend in a first circumferential direction from the first end portion toward the second end portion of the center portion; anda second perimeter portion bent at a second side of the first end portion of the center portion, and curved to extend from the first end portion toward the second end portion in a second circumferential direction that is opposite to the first circumferential direction of the first perimeter portion.