Battery-capacitor hybrid energy storage system for high temperature applications

摘要

A hybrid energy storage system (ESS) includes a first energy storage device including a battery having an impedance for providing a substantially constant power output, and a second energy storage device linked to the first energy storage and including a high power electrochemical double layer capacitor (EDLC) for providing intermittent bursts of high voltage output in a range of 1.5 to 3.0 volts, wherein an operation rating of the second energy source is within a temperature range between 75 degrees Celsius and 330 degrees Celsius while exhibiting a leakage current less than 1 amp per liter of volume over the range of operating temperatures and at a voltage up to a rated voltage.

主权项

1. A hybrid energy storage system (HESS) comprising:
a first energy storage device including a battery configured to provide a substantially constant power output; and a second energy storage device linked to the first energy storage and including a high power electrochemical double layer capacitor (EDLC) for providing intermittent bursts of high power output over the range of 1.5 to 3.5 volts, wherein an operation rating of the second energy source is within a temperature range between 75 degrees Celsius and 330 degrees Celsius while exhibiting a leakage current less than 1 amp per liter of volume over the range of operating temperatures and at a voltage up to 3.5 volts; wherein the HESS provides lower weight and volume than a battery energy storage system (BESS) that is capable of providing comparable bursts of high power output, wherein the EDLC comprises two electrodes wetted with an electrolyte, each electrode being attached to or in contact with or coated onto a current collector and separated from each other by a separator porous to the electrolyte, wherein the electrodes, electrolyte, and current collector contain less than 1,000 parts per million (ppm) of impurities, and wherein the electrodes, electrolyte, and separator have a moisture concentration of less than 1,000 ppm.