ELECTRODE BODY AND POWER STORAGE ELEMENT

• Main Authors: KAKO TOMONORI, OSUGI YUTA, KAWAZOE YUDAI, SEKIGUCHI HIROMASA
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide an electrode body capable of suppressing the occurrence of gaps between electrodes in a wound body in which the electrodes are wound, and a power storage element including the electrode body.SOLUTION: An electrode body includes a wound body 20 having a wound electrode, and a shape-retaining portion 25 having at least one sheet-like member 250 harder than the electrode and maintaining the shape of the wound body, and the at least one sheet-shaped member has a first surface S1 and a second surface S2 that is the back surface of the first surface, and a pair of end portions 25B, which surround the wound body in the winding direction and are joined to each other, have their first surfaces opposed to each other, by arranging the electrode along the outer peripheral surface of the wound body with the first surface facing the wound body, and joining the ends of the electrodes in the winding direction.SELECTED DRAWING: Figure 5 【課題】電極が巻回されている巻回体において電極間の隙間の発生を抑えることができる電極体、及びこの電極体を備える蓄電素子を提供する。【解決手段】巻回された電極を有する巻回体２０と、電極より硬い少なくとも一つのシート状部材２５０を有し且つ巻回体の形状を保つ保形部２５と、を備え、少なくとも一つのシート状部材は、第一の面Ｓ１と該第一の面の裏面である第二の面Ｓ２とを有し、第一の面を巻回体に向けた状態で該巻回体の外周面に沿って配置されると共に電極の巻回方向における端部を互いに接合させることで巻回体を巻回方向に囲み、接合された一対の端部２５Ｂは、第一の面を互いに対向させている。【選択図】図５