一种用于氧化还原液流电池的电池的框架，其能够改善狭缝中的电解质溶液的放热并且能够抑制电解质溶液的温度升高。 1。一种用于氧化还原液流电池的电池单元的框架，包括：形成在框架内部的开口;电解质流过的歧管;以及歧管和开口之间的连接部分， 和用于形成所述流路的狭缝，所述狭缝具有在垂直于所述电解质流动方向的横截面，并具有一对侧壁彼此相对，所述侧壁的距离的深度至少与狭缝的深度方向的一部分上， 具有狭窄部分的框架在一个方向上变窄。

It is possible to improve the heat dissipation of the electrolyte solution in the slit, and provides the frames used in the cell of the redox flow battery capable of suppressing the temperature increase of an electrolytic solution. Les as frames used in the cell of the redox flow cell, by connecting with the openings formed on the inner side of the frame and manifold electrolyte flow, and said manifold said opening, of said electrolyte solution between the manifold and the opening and a slit for forming the flow path, the slit has, in a cross section perpendicular to the electrolyte flow direction and has a pair of side walls opposed to each other, the distance of the side wall the depth to at least a portion of the depth direction of the slit, a frame having a small-width portion is narrowed in a direction.