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Modelling of Lithium Ion Battery Lifetime Under Varying Charging Current Ripple
In this project, you will do an extensive literature review on the modelling of batteries. Your results from this investigation can then be used to determine if high-frequency ripple in the battery current has a significant influence on the battery's lifetime.
At HPE, an OnBoard Charger (OBC) for EVs with a battery voltage >800V
is currently designed. To properly design the OBC, knowledge about the
battery system behavior is required. Usually, an equivalent circuit model of
the battery is sufficient. A further interesting characteristic of the battery
is the influence of the charger current ripple on the battery lifetime.
In this project, you will do an extensive literature review on the modelling
of batteries. Your results from this investigation can then be used to
determine if high-frequency ripple in the battery current has a significant
influence on the battery’s lifetime. Based on this, you will determine the
filtering requirements for the output voltage/current of the OBC. If higher
current ripple is acceptable, a more compact OBC design can potentially
be achieved.
In the second part of the project, you will consider electrical and thermal
models of the EV battery and use these to simulate the battery behavior
over its lifetime, which will contribute to the design of the OBC control
system.
At HPE, an OnBoard Charger (OBC) for EVs with a battery voltage >800V is currently designed. To properly design the OBC, knowledge about the battery system behavior is required. Usually, an equivalent circuit model of the battery is sufficient. A further interesting characteristic of the battery is the influence of the charger current ripple on the battery lifetime. In this project, you will do an extensive literature review on the modelling of batteries. Your results from this investigation can then be used to determine if high-frequency ripple in the battery current has a significant influence on the battery’s lifetime. Based on this, you will determine the filtering requirements for the output voltage/current of the OBC. If higher current ripple is acceptable, a more compact OBC design can potentially be achieved. In the second part of the project, you will consider electrical and thermal models of the EV battery and use these to simulate the battery behavior over its lifetime, which will contribute to the design of the OBC control system.
BatteryBehavior.pdf
