SECONDARY BATTERY USING BIPOLAR ELECTRODE

• Main Authors: SUKIGARA YOSHI, FUJIMOTO SHINJI, AKUTSU SHIGEMITSU, AOYAGI SHINTARO
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a secondary battery using a bipolar electrode, with excellent productivity, while having a small size even in the case of connecting, in parallel, a plurality of serial connection bodies in which single lamination bodies are connected in series.SOLUTION: A secondary battery comprises: a partial power generation element structured by a single lamination body on which a bipolar electrode 17 is laminated, and a multi-layer body on which the plurality of single lamination bodies is laminated; a positive normal electrode 3; and a negative normal electrode 4. The partial power generation element structures a serial partial power generation element laminated in a direction of a polarity in which the single lamination body as a component of the multi-layer body constructs a serial connection between the positive normal electrode 3 and the negative normal electrode 4. The serial partial power generation element structures a parallel connection body by jointing with polarity in a reverse direction while nipping a positive collector electrode 3a (a negative collector electrode 4a) between the positive collector electrode 3a (the negative collector electrode 4a) and two negative normal electrodes 4 (positive normal electrodes 3) corresponding to them, and by connecting the serial partial power generation element in parallel between the positive collector electrode 3a (negative collector electrode 4a) and the two negative normal electrode 4 (positive normal electrodes 3).SELECTED DRAWING: Figure 9 【課題】単積層体を直列接続した直列接続体を複数並列接続する場合においても小型で生産性に優れたバイポーラ電極を用いた二次電池を提供すること。【解決手段】バイポーラ電極１７が積層された単積層体又は前記単積層体が複数積層された多層積層体で構成される部分発電要素と、正極通常電極３及び負極通常電極４とを備え、部分発電要素は正極通常電極３と負極通常電極４との間で多層積層体の構成要素である前記単積層体が直列接続を構成する極性の向きで積層された直列部分発電要素を構成し、正極集電電極３ａ（負極集電電極４ａ）とこれに対応する２つの負極通常電極４（正極通常電極３）との間で、直列部分発電要素が、正極集電電極３ａ（負極集電電極４ａ）を挟んで極性が逆向きに接合し、正極集電電極３ａ（負極集電電極４ａ）と２つの負極通常電極４（正極通常電極３）との間で直列部分発電要素を並列接続して並列接続体を構成した。【選択図】図９