RECHARGEABLE BATTERY MODULE

摘要

A rechargeable battery module includes unit battery cells and a bus bar connecting the unit battery cells in parallel. Each unit battery cell includes a cap plate, a case that accommodates an electrode assembly, lead tabs connected to the electrode assembly, one of the lead tabs including a cell fuse, first and second electrode terminals that penetrate the cap plate and are connected to the lead tabs, and an external short-circuit part including a membrane that seals a short-circuit hole of the cap plate and that is electrically connected to the second electrode terminal and a connection plate that is electrically connected to the first electrode terminal. The bus bar includes two current paths that connect neighboring second electrode terminals through different resistances, one of the two current paths including an external fuse. A resistance of the external fuse is greater than a resistance of the cell fuse.

主权项

1. A rechargeable battery module, comprising
a plurality of unit battery cells and a bus bar connecting the unit battery cells in parallel, wherein each unit battery cell includes: a cap plate sealing an opening of a case that accommodates an electrode assembly; lead tabs connected to the electrode assembly, one of the lead tabs including a cell fuse; first and second electrode terminals that penetrate the cap plate, the first and second electrode terminals being connected to the lead tabs; and an external short-circuit part including a membrane that seals a short-circuit hole of the cap plate and that is electrically connected to the second electrode terminal and a connection plate that is electrically connected to the first electrode terminal, wherein: the bus bar includes two current paths that connect neighboring second electrode terminals through different resistances, one of the two current paths including an external fuse, and a resistance of the external fuse is greater than a resistance of the cell fuse.