Performance Analysis of a Novel High Frequency Self-Reconfigurable Battery

Abstract

Self-reconfigurable battery architectures have gained a lot of interest recently in the literature, with more and more advanced functionalities. This paper describes the performance analysis of our proposed High Frequency Self-Reconfigurable Battery (HF SRB). To evaluate specific features with long-term dependencies of our system, a full functional behavioral simulator was developed. A comparison with a real 128-level HF SRB validated the simulator operation. The balancing performances obtained on vehicle test cycles showed the cell capacity discrepancy that the HF SRB is capable of handling in a single complete charge or discharge cycle. The magnitude of this gap demonstrated the extent to which the HF SRB is capable of operating with second life cells or even different chemistry mixes.

Optimal lifetime management strategy for Self-Reconfigurable Batteries

“…Knowing the benefits of the optimal strategy compared to no strategy for SRB, it would be interesting to compare this result to conventional battery pack. The balancing capabilities of SRB experimented in [17] are so important that it can be assumed that a voltage balancing extracts most of the energy of the SRB. The mean value of the cell capacity is then a good image of the battery pack capacity.…”

Nonlinear Model Predictive Control for Lifetime Extension of Self-Reconfigurable Batteries

“…3. In [10], the cell's exchanged current is controlled by connecting them in a specific order in the waveform. Therefore, an average current for each cell can be applied by using a sorting algorithm.…”

Simulation and Testing of Self-Reconfigurable Battery Advanced Functions for Automotive Application

“…As shown in many articles [1], battery-switching technologies of Self-Reconfigurable Batteries (SRBs) promise significant improvements in terms of autonomy and battery life, cell balancing [2][3][4][5][6][7], recharging capacity [8][9][10][11], improving the efficiency of vehicle drive trains [12][13][14] and even cell aging [15][16][17]. Their operating principle is as follows: switches are added to the power paths linking the cells to enable the number of active stages in series and parallel to be modulated dynamically [18], depending on the type of SRB.…”