Abstract: Systems, methods, and media for determining an energy storage device state of health are disclosed herein. The system can determine a first cycle time for an energy storage device; determine a first energy storage capacity for the energy storage device; determine a first electrolyte concentration for the energy storage device at the first cycle time; determine a second cycle time for the energy storage device; determine a second electrolyte concentration for the energy storage device at the second cycle time; and determine a degradation rate indicating an expected degradation of the energy storage device per cycle time unit based at least on: a first difference between the first electrolyte concentration and the second electrolyte concentration; and a second difference between the first cycle time and the second cycle time.

Abstract: Embodiments described herein include a system or method for designing an energy storage device as a function of size, including form factor and component sizes, component materials, and operating conditions, including charge or discharge current, charge or discharge power, ambient temperature, and temperature generated by the energy storage device. The system may determine a dynamic state of charge of a to-be-built energy storage device based on determined energy storage and dynamic voltage as a function of charge or discharge current, size component materials, and operating conditions.

Abstract: A constant pressure system for pumping a coal slurry includes a slurry pump mechanically driven by a hydraulic motor which, in turn, is driven by a hydraulic pump. The output of the hydraulic pump is controlled by a pressure sensitive flow control valve that maintains the hydraulic fluid pressure drop as a constant across the hydraulic motor. The system assures a constant hydraulic motor output torque, driving the slurry pump at a constant delivery pressure.