Nauman Khurshid Haider, Elektroteknik

​Title: Optimal Control of Reconfigurable Multi-battery Systems

Examiner: Changfu Zou, Chalmers
Industrial supervisor: Faisal Altaf, Volvo Group
Opponent: Thanisorn Sriudomporn

Abstract of the presentation:
In the last two decades automotive sector has been working towards electrification in a bid to replace fossil fuel vehicles and reduce greenhouse gases emissions. Most of the companies until recently have focused the efforts towards small passenger vehicles as heavy vehicles have greater power demands and far more complex control requirements as trucks spend on average 14 hours per day on the road compared to passenger vehicles that are parked 95% of the time. However, the advancements in battery manufacturing techniques and control methods have brought forward solutions that have made it possible to bring electrification in heavy vehicles and marine applications. Due to high power demands, the vehicle vehicles require more than one than one battery pack in its energy storage system (ESS). These batteries are connected in series and/or parallel configuration to fulfill the load requirements. This makes the control problem unique and more challenging compared to passenger vehicles using single battery pack.

Balancing load among all the battery packs in the ESS is of utmost importance to achieve optimal performance and increase through put of the system. In this thesis, optimal control of reconfigurable battery system (RBS) is investigated for application in battery-powered electrified vehicles (xEVs). The RBS through optimal switching enables distribution of load among various packs in an optimal way to increase systems power capabilities. The optimal control problem is formulated for load sharing with the main objective of maximizing state-of-power (SoP) through charge and thermal balancing observing given physical constraints (dynamics, safety, health, power limits etc.) of each unit. The control problem is then solved in a receding horizon fashion using a model predictive control framework. A comparison between the proposed control framework with that of conventional (fixed) multi-battery system using different load cycles and operating conditions. The results illustrate that power capacity of ESS can be increased with an RBS system compared to a conventional battery system.

Nauman Khurshid Haider and Changfu  Zou
​Join the seminar by Zoom
Passcode: 972768
Kategori Studentarbete
Plats: Online
Tid: 2022-06-07 10:30
Sluttid: 2022-06-07 11:30

Sidansvarig Publicerad: må 23 maj 2022.