Assembled battery and battery pack

摘要

An assembled battery includes a conductive filler, a first cell, a second cell. The first cell includes a flat first electrode tab made of aluminum or an aluminum alloy. The second cell includes a flat second electrode tab made of aluminum or an aluminum alloy. The second electrode tab is electrically connected to the first electrode tab through the conductive filler intervening between the first cell and the second cell and through weld surfaces of the first cell and the second cell which are at least partly welded to each other.

主权项

1. An assembled battery, comprising:
a first cell comprising a first electrode tab made of aluminum or an aluminum alloy and comprising a plurality of protruding welding surfaces distributed as spots; a second cell comprising a second electrode tab formed of aluminum or an aluminum alloy,
wherein the first electrode tab is partially welded to the second electrode tab at the plurality of protruding welding surfaces and the first electrode tab and the second electrode tab are electrically connected at the plurality of protruding welding surfaces; a plurality of gaps formed between the first electrode tab and the second electrode tab between the plurality of protruding welding surfaces; and a mixture formed within the plurality of gaps comprising a conductive filler and an organic binder,
wherein the second electrode tab is further electrically connected to the first electrode tab via the conductive filler,wherein the mixture is stabbed into a first oxide film formed on a surface of the first electrode tab and a second oxide film formed on a surface of the second electrode tab, and wherein the conductive filler is selected from carbon powder and graphite powder.