Abstract
In this paper, a new control strategy of battery-ultracapacitor hybrid energy storage system (HESS) is proposed for hybrid electric drive vehicles (HEVs). Compared to the stand, alone battery system may not be sufficient to satisfy peak demand periods during transients in HEVs, the ultracapacitor pack can supply or recover the peak power and it can be used in high C-rates. However, the problem of battery-ultracapacitor hybrid energy storage system (HESS) is how to interconnect the battery and ultracapacitor and how to control the power distribution. This paper reviewed some battery-ultracapacitor hybrid energy storage system topology and investigated the advantages and disadvantages, then proposed a new control strategy. The proposed control strategy can improve the system performance and ultracapacitor utilization, while also decreasing the battery pack size to avoid the thermal runaway problems and increase the life of the battery. The experiment results showed the proposed control strategy can improve 3% - 4% ultracapacitor utilization.
Highlights
Hybrid energy storage system (HESS) is very important of hybrid electric vehicles because environmental issue and the increasing energy cost need to be considered [1]
Alone battery system may not be sufficient to satisfy peak demand periods during transients in hybrid electric drive vehicles (HEVs), the ultracapacitor pack can supply or recover the peak power and it can be used in high C-rates
This paper reviewed some battery-ultracapacitor hybrid energy storage system topology and investigated the advantages and disadvantages, proposed a new control strategy
Summary
Hybrid energy storage system (HESS) is very important of hybrid electric vehicles because environmental issue and the increasing energy cost need to be considered [1]. How to control the hybrid energy storage system is a very important thing. A new control strategy of battery-ultracapacitor hybrid energy storage system (HESS) is proposed for hybrid electric drive vehicles (HEVs) in this paper. Combining the battery and ultracapacitor is a better solution of hybrid energy storage system.
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