POWER STORAGE ELEMENT

PROBLEM TO BE SOLVED: To provide a power storage element having an electrode body and a collector bonded by using an auxiliary member, and capable of being manufactured efficiently.SOLUTION: In a power storage element 10 including an electrode body 140 formed by laminating polar plates, and a collector 120 and an auxiliary member 150 bonded to the focusing portion 141 at the end of the electrode body 140 in a first direction crossing the polar plate, the auxiliary member 150 has a first plate part 151 and a second plate part 152, at least one of which is bonded to the focusing portion 141 while sandwiching the focusing portion 141 between the collector 120, and a connection 153 including a plane in parallel with the first direction, and connecting the first plate part 151 and second plate part 152.SELECTED DRAWING: Figure 3 【課題】電極体と集電体とが補助部材を用いて接合される蓄電素子であって、効率よく製造することができる蓄電素子を提供する。【解決手段】極板が積層されることで形成された電極体１４０と、電極体１４０の、極板の積層方向と交差する第一方向の端部の集束部１４１に接合された集電体１２０および補助部材１５０とを備える蓄電素子１０であって、補助部材１５０は、少なくとも一方が、集電体１２０との間に集束部１４１を挟んだ状態で集束部１４１に接合される第一板部１５１および第二板部１５２、並びに、前記第一方向に平行な面を含み、第一板部１５１と第二板部１５２とを接続する接続部１５３を有する。【選択図】図３