BUS BAR PROTECTION STRUCTURE

To suppress a situation that an insulation state between a bus bar and the periphery cannot be maintained when abnormality occurs in a battery cell.SOLUTION: A bus bar electrically connecting at least two electric cells comprises a conductor part, heat resistant insulator, an inner resin cover and an outer resin cover. The conductor part is provided between the at least two electric cells and electrically connects them. The heat resistant insulator is provided so as to cover the periphery of a portion excluding the connected portion with the at least two electric cells in the conductor part. The inner resin cover is provided between the heat resistant insulator and a portion excluding the connected portion and provided so as to cover the portion excluding the connected portion. The outer resin cover is provided so as to enclose the periphery of the heat resistant insulator.SELECTED DRAWING: Figure 5 【課題】電池セルの異常発生時にバスバーと周囲の間の絶縁状態が維持できなくなるのを抑える。【解決手段】少なくとも２つの単電池を電気的に接続するバスバーは、導体部と、耐熱絶縁体と、内側樹脂カバーと、外側樹脂カバーと、を備える。前記導体部は、前記少なくとも２つの単電池の間に設けられてこれらを電気的に接続する。前記耐熱絶縁体は、前記導体部のうちの前記少なくとも２つの単電池との接続部位を除いた部位の周囲を覆うように設けられる。前記内側樹脂カバーは、前記耐熱絶縁体と、前記接続部位を除く部位との間に設けられて、前記接続部位を除く部位を覆うように設けられる。前記外側樹脂カバーは、耐熱絶縁体の周囲を囲うように設けられる。【選択図】図５