Methods and systems for redox flow battery electrolyte hydration

A redox flow battery system, comprising:

• a field hydration system that is separate from the redox flow battery system and detachably fluidly coupleable to positive and negative electrolyte chambers of the redox flow battery system, a redox flow battery cell fluidly coupled to the positive and negative electrolyte chambers;
• dry electrolytes located in the positive and negative electrolyte chambers with less than a threshold amount of solvents;
• the field hydration system detachably fluidly coupleable to a water source arranged externally to the redox flow battery cell;
• the field hydration system including a filtration system bifurcated into a first filter passage and a second filter passage positioned between the water source and the positive and negative electrolyte chambers;
• and
• a controller, including executable instructions stored thereon to,
• activate a water supply pump of the field hydration system configured to flow water from the water source to the positive and negative electrolyte chambers;
• charge by applied current and discharge the redox flow battery cell during operation.

A redox flow battery system, including first and second electrolyte chambers fluidly coupled to a redox flow battery cell, and a controller with executable instructions stored in non-transitory memory thereon to:

• during a first condition as determined by the controller, including when the redox flow battery system is in a dry state without water and liquid solvents,
• add first and second amounts of dry electrolyte precursor to the first and second electrolyte chambers, respectively, the first and second amounts corresponding to a desired concentration of first and second electrolytes in the first and second electrolyte chambers during an operating mode, including when the redox flow battery system is being charged by applied current or discharged, fluidly couple the redox flow battery system to a field hydration system using one or more actuators controlled by the controller, the field hydration system detachably fluidly coupled to the first and second electrolyte chambers of the redox flow battery system and including a water supply pump detachably fluidly coupled to a water source,
• flow water from the water source through a filtration system including a first filter passage and a second filter passage positioned between the water source and the first and second electrolyte chambers,
• supply water from the field hydration system to the redox flow battery system, wherein the redox flow battery system would remain in the dry state without the water from the field hydration system,
• operate the redox flow battery system in at least one operating mode in response to decoupling the field hydration system from the redox flow battery system.