SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME

摘要

A propulsion system includes an electric drive, a first energy storage system electrically coupled to the electric drive through a DC link, and a second energy storage system electrically coupled to the first energy storage system in a series connection. The first energy storage system comprises a high specific-energy storage device and the second energy storage system comprises a low specific-power storage device. The propulsion system also includes a third energy storage system comprising a high specific-energy storage device electrically coupled to the second energy storage system. A bi-directional boost converter is electrically coupled to the second and third energy storage systems such that a terminal of the third energy storage system is electrically coupled to a low voltage side of the bi-directional boost converter and a terminal of the second energy storage system is coupled to a high voltage side of the bi-directional boost converter.

主权项

1. An energy storage arrangement for an electrically powered vehicle, the energy storage arrangement comprising:
a first bi-directional boost converter; a first energy storage device having a negative terminal coupled to a high-voltage side of the first bi-directional boost converter; a second energy storage device having a positive terminal coupled to the high-voltage side of the first bi-directional boost converter and the negative terminal of the first energy storage device; and a third energy storage device coupled to a low-voltage side of the bi-directional boost converter; wherein the first energy storage system comprises a different type of energy storage system than the second energy storage system.