Flow battery system

A redox flow battery (RFB), comprising:

• a shell having a shell height;
• an electrolyte storage tank assembly disposed in the shell, wherein at least a portion of the electrolyte storage tank assembly is supported by the shell, wherein the electrolyte storage tank assembly is configured to store an electrolyte liquid such that the electrolyte liquid has an electrolyte liquid height that is at or below the shell height when stored within the electrolyte storage tank assembly, and wherein the electrolyte storage tank assembly includes a stepped shelf located at a height above the bottom of the electrolyte storage tank assembly and below the shell height;
• an electrochemical cell;
• and
• an electrolyte circulation system configured for fluid communication between the electrolyte storage tank assembly and the electrochemical cell, wherein the electrolyte circulation system includes a pump assembly, wherein the pump assembly is moveable between a first position, where the pump assembly is coupled to stepped shelf, and a second position, where the pump assembly is spaced apart from the stepped shelf.

A redox flow battery (RFB), comprising:

• a shell having a first end, a second end, and a shell height extending between the first and second ends;
• an electrolyte storage tank assembly disposed in the shell, wherein at least a portion of the electrolyte storage tank assembly is supported by the shell, wherein the electrolyte storage tank assembly is configured to store an electrolyte liquid such that the electrolyte liquid has an electrolyte liquid height that is at or below the shell height;
• an electrochemical cell;
• and
• an electrolyte circulation system configured for fluid communication between the electrolyte storage tank assembly and the electrochemical cell, wherein the electrolyte circulation system includes a pump assembly, wherein the pump assembly is moveable within the shell between a first position and a second position such that the pump assembly is positioned closer to the first end of the shell when the pump assembly is in the first position than when the pump assembly is in the second position, and wherein the pump assembly is positioned in the first position when the pump assembly is in operation.