Battery cell and redox flow battery

Patent metadata

Field	Value
Publication number	US-2017237104-A1
Application number	US-201515501502-A
Country	US
Kind code	A1
Filing date	Oct 5, 2015
Priority date	Nov 6, 2014
Publication date	Aug 17, 2017
Grant date	—

Abstract

The battery cell for a flow battery includes a cell frame including a frame including a through-window and a manifold serving as an electrolyte flow path, and a bipolar plate blocking the through-window; a positive electrode disposed on one surface side of the bipolar plate; and a negative electrode disposed on another surface side of the bipolar plate. In this battery cell, in the frame, a thickness of a portion in which the manifold is formed is defined as Ft; in the bipolar plate, a thickness of a portion blocking the through-window is defined as Bt; in the positive electrode, a thickness of a portion facing the bipolar plate is defined as Pt; in the negative electrode, a thickness of a portion facing the bipolar plate is defined as Nt; and these thicknesses satisfy Ft≧4 mm, Bt≧Ft−3.0 mm, Pt≦1.5 mm, and Nt≦1.5 mm.

First claim

1 . A battery cell for a flow battery, comprising:
a cell frame including a frame including a through-window and a manifold serving as an electrolyte flow path, and a bipolar plate blocking the through-window; a positive electrode disposed on one surface side of the bipolar plate; and a negative electrode disposed on another surface side of the bipolar plate, wherein in the frame, a thickness of a portion in which the manifold is formed is defined as Ft; in the bipolar plate, a thickness of a portion blocking the through-window is defined as Bt; in the positive electrode, a thickness of a portion facing the bipolar plate is defined as Pt; in the negative electrode, a thickness of a portion facing the bipolar plate is defined as Nt; and these thicknesses satisfy
Ft≧4 mm,

Bt≧Ft− 3.0 mm,
Pt≦1.5 mm, and

Nt≦1.5 mm.

2 . The battery cell according to claim 1 , wherein a flow channel serving as an electrolyte channel is formed on each of the one surface side and the other surface side of the bipolar plate.

3 . The battery cell according to claim 1 , wherein the frame includes, as an inner peripheral recess portion, a peripheral portion surrounding a whole periphery around the through-window and having a smaller thickness than another portion of the frame, and
the bipolar plate includes an outer peripheral engagement portion extending along a whole outer periphery of the bipolar plate, having a predetermined width, and engaging with the inner peripheral recess portion.

4 . The battery cell according to claim 3 , wherein the outer peripheral engagement portion is formed so as to have a smaller thickness than another portion of the bipolar plate.

5 . A redox flow battery comprising:
a cell stack in which a plurality of the battery cells according to claim 1 are stacked; a positive circulation line configured to circulate a positive electrolyte through the cell stack; and a negative circulation line configured to circulate a negative electrolyte through the cell stack.

Assignees

• Sumitomo Electric Industries

Inventors

• Kanno Takashi
• Yamanishi Katsuya
• Ito Takefumi
• Kuwabara Masahiro
• Moriuchi Kiyoaki
• Yamaguchi Hideyuki
• Fujita Hayato
• Shiraki Kousuke
• Hayashi Kiyoaki

Classifications

• H01M8/188 Primary

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M8/0273

  with sealing or supporting means in the form of a frame · CPC title

• H01M8/0271

  Sealing or supporting means around electrodes, matrices or membranes · CPC title

• H01M8/2459

  Comprising electrode layers with interposed electrolyte compartment with possible electrolyte supply or circulation · CPC title

• H01M8/0258

  characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant · CPC title