Composite current collector, electrode plate, secondary battery, and power consuming apparatus

Abstract

A composite current collector, an electrode plate, a secondary battery, and a power consuming apparatus. The composite current collector includes a substrate layer and a conductive layer, where the substrate layer has a first surface and a second surface that are opposite to each other; the conductive layer is disposed on the first surface and/or the second surface; and a via is provided inside the conductive layer. When a battery is in an abnormal working condition to cause the composite current collector to bear a force abnormally, the conductive layer tends to crack near the via timely, so that the current transmission inside the current collector is weakened, and the risk of ongoing electrochemical reactions inside the battery under the abnormal working condition is reduced, which is conducive to reducing a risk of thermal runaway such as fire or explosion occurring in the battery.

Dependencies are inferred from the claim text.