REDOX FLOW CELL AND POWER SUPPLY SYSTEM INCLUDING REDOX FLOW CELL

• Main Authors: NOGUCHI YOSHINORI, WAKASA TSUYOSHI, KIYABU TOSHIYASU, SATO AKIO, MORIYAMA KEI, KOBAYASHI YUTAKA, NAKA TAKEHIRO
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a redox flow cell which can perform electric discharge while reducing loss and a power supply system including the redox flow cell.SOLUTION: A redox flow cell includes: at least one cell which has a first chamber and a second chamber which are partitioned by a membrane; a first electrolyte circulation device which circulates first electrolyte to the first chamber; and a second electrolyte circulation device which circulates second electrolyte to the second chamber. At least one of the first electrolyte circulation device and the second electrolyte circulation device has a high order electrolyte tank provided at a higher position than the cell, an electrolyte circulation path communicating the high order electrolyte tank with the first chamber or the second chamber, and an electrolyte outflow path for flowing out the first electrolyte or the second electrolyte flowed into the first chamber or the second chamber from the high order electrolyte tank, from the first chamber or the second chamber, and is configured such that the first electrolyte or the second electrolyte flows into the first chamber or the second chamber from the high order electrolyte tank through the electrolyte circulation path by a water head difference between a liquid level of the first electrolyte or the second electrolyte within the high order electrolyte tank and the cell.SELECTED DRAWING: Figure 1 【課題】損失を低減しながら放電可能なレドックスフロー電池及びこのレドックスフロー電池を備える給電システムを提供する。【解決手段】レドックスフロー電池は、隔膜で仕切られた第１室及び第２室を有する少なくとも１つのセルと、第１室に第１電解液を流通させる第１電解液流通装置と、第２室に第２電解液を流通させる第２電解液流通装置とを備え、第１電解液流通装置又は第２電解液流通装置の少なくとも一方は、セルよりも高い位置に設けられる高位電解液タンクと、高位電解液タンクと第１室又は第２室とを連通する電解液流通経路と、高位電解液タンクから第１室又は第２室に流入した第１電解液又は第２電解液が第１室又は第２室から流出するための電解液流出経路とを備え、高位電解液タンク内の第１電解液又は第２電解液の液面とセルとの水頭差によって、高位電解液タンクから電解液流通経路を介して、第１電解液又は第２電解液が第１室又は第２室に流入するように構成されている。【選択図】図１