The disclosure provides a design method for a connection sheet, a connection sheet, an
energy storage device, and an electric device. The design method for the connection sheet includes: an area S of a
welding region, connectable to a tab, of the connection sheet is obtained; the connection sheet is divided into a first effective region and a second effective region, where the first effective region is a region, having a regular shape, of the connection sheet, the second effective region is a region, connectable to a terminal post, of the connection sheet, the first effective region (10) is implemented as N first effective regions (10), N≥1, and multiple first effective regions (10) are connected on the same side of the second effective region (20); a gauge size of the first effective region is determined according to S= a*S1, a being in a range of 0.095~0.96, and S1 being an area of the first effective region. Thus, an area of the
welding region, connectable to a tab, of the connection sheet satisfies the
overcurrent requirement, and gauge size of the first effective region is reasonable, so that design redundancy may be avoided,
verification times in a
design process is reduced. Moreover, the gauge size of the connection sheet is reasonable, so that the production cost may be reduced.