Rechargeable secondary battery having improved safety against puncture and collapse

摘要

A rechargeable battery having improved safety against puncture and collapse includes an electrode assembly, a case, a first electrode terminal and a second electrode terminal, a cap plate, and a short circuit member. The electrode assembly includes a first electrode, a separator, and a second electrode. The case contains the electrode assembly. The first electrode terminal and a second electrode terminal are electrically connected to the first electrode and the second electrode, respectively. The short circuit member is between the electrode assembly and the case and short circuits the secondary battery when the secondary battery is punctured or collapsed.

主权项

1. A rechargeable battery comprising:
a first electrode assembly comprising a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case containing the first electrode assembly; a cap plate coupled to the case; a short circuit member being electrically connected and welded to at least one of the first electrode or the second electrode at a first welding point; a first electrode terminal; a second electrode terminal; and a second electrode assembly inside the case, wherein the short circuit member is integrally wound around the first electrode assembly and the second electrode assembly, wherein the short circuit member comprises an electrically conductive material, and wherein the short circuit member is welded to both said first electrode or second electrode and to a corresponding one of the first electrode terminal or the second electrode terminal at a second welding point that is different from the first welding point, while the short circuit member at the first welding point is welded to only the at least one of the first electrode and the second electrode.