Session
Technical Session VII: Advanced Technologies II
Abstract
A novel hybrid energy storage system consisting of a low temperature Li-ion cell and a bank of super-capacitors is evaluated for performance enhancements at high power and low temperature for future deep-space CubeSat applications. Although no significant improvements are observed in terms of the energy storage as compared to a CubeSat polymer battery, the hybrid power system exhibited substantial gains in power with high current (15A) pulse testing. The minimum discharge voltage is about 2.0 V higher than the standalone Li-ion cell at the worst case initial 50% SOC. The low impedance of the hybrid system which is responsible for the observed performance improvement is about 5 mOhm at a -40 oC operating temperature and is substantially lower than the CubeSat baseline polymer battery of about 1000 mOhm. To advance the technology for future aerospace applications, JPL is planning to design and to test a hybrid energy storage system in a space environment that will be based on the results of this investigation which is a part of a SmallSat Collaborative Agreement with the California State University, Northridge.
Li-ion battery and super-capacitor Hybrid energy system for low temperature SmallSat applications
A novel hybrid energy storage system consisting of a low temperature Li-ion cell and a bank of super-capacitors is evaluated for performance enhancements at high power and low temperature for future deep-space CubeSat applications. Although no significant improvements are observed in terms of the energy storage as compared to a CubeSat polymer battery, the hybrid power system exhibited substantial gains in power with high current (15A) pulse testing. The minimum discharge voltage is about 2.0 V higher than the standalone Li-ion cell at the worst case initial 50% SOC. The low impedance of the hybrid system which is responsible for the observed performance improvement is about 5 mOhm at a -40 oC operating temperature and is substantially lower than the CubeSat baseline polymer battery of about 1000 mOhm. To advance the technology for future aerospace applications, JPL is planning to design and to test a hybrid energy storage system in a space environment that will be based on the results of this investigation which is a part of a SmallSat Collaborative Agreement with the California State University, Northridge.
