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US 11,688,874 B2Granted
Methods and system for manufacturing a redox flow battery system by roll-to-roll processing
AssigneeEss Tech, Inc.
InventorCraig E. Evans
Life of this patent
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Abstract
Methods and systems are provided for manufacturing a bipolar plate for a redox flow battery. In one example, the bipolar plate is fabricated by a roll-to-roll process. The bipolar plate includes a non-conductive substrate that is coupled to a negative electrode on a first surface and coupled to a positive electrode on a second surface, the first surface opposite of the second surface.
Claims7
A redox flow battery system, comprising:
- a battery cell including:
- a bipolar plate assembly including a fluid-impermeable layer sandwiched between a negative electrode and a positive electrode, wherein the fluid-impermeable layer is formed from thermoplastic;
- a negative electrolyte in contact with the negative electrode, wherein the negative electrode is formed from a carbon sheet coupled to a first surface of the thermoplastic;
- a positive electrolyte in contact with the positive electrode, wherein the positive electrode is formed from a carbon or graphite felt coupled to a second surface of the thermoplastic, the second surface opposite of the first surface;
- and
- a conductive thread penetrating through a thickness of the bipolar plate and maintaining the coupling of the negative electrode to the first surface of the thermoplastic and the coupling of the positive electrode to the second surface of the thermoplastic and wherein the thermoplastic is melted and sealed around portions of the conductive thread extending through a thickness of the thermoplastic;
- wherein the fluid-impermeable layer separates the negative electrolyte from the positive electrolyte within the battery cell.
4 more elements
Dependencies are inferred from the claim text.