Battery pack comprising thermal management system for generating vibration

Abstract

The present disclosure further concerns a method of charging such a battery pack, and an electrified vehicle comprising such a battery pack. The present disclosure concerns a battery pack (303) for an electrified vehicle (301). The battery pack comprises: - a plurality of battery cells (505); and - a thermal management system (400) comprising a heat transfer element (403). The heat transfer element (403) comprises a flow channel (507) and is arranged to provide heat transfer from the plurality of battery cells (505) to a heat transfer medium whenever a heat transfer medium flows through the flow channel (507). The battery pack (303) is arranged to produce vibration of the plurality of battery cells (505) via vibration of the heat transfer element (403) whenever a heat transfer medium flows through the heat transfer element (403). The present disclosure further concerns a method of charging such a battery pack (303), and an electrified vehicle (301) comprising such a battery pack (303).

Description

technical field [0001] The invention relates to a battery pack for an electric vehicle. The invention also relates to a method of charging a battery pack. Background technique [0002] The ongoing electrification trend in the automotive industry is partly a response to the challenges posed by increasingly stringent emissions regulations. As electric motors are increasingly used as the primary propulsion system of vehicles, batteries with greater capacity are required in order to provide extended all-electric range or "electric autonomy". [0003] A factor limiting wider adoption of electric vehicles is the time required to charge batteries with larger capacities. For example, fully charging a plug-in hybrid car using a home charger typically takes hours. Charging times can be reduced by using specific charging infrastructure that can provide higher charging efficiency. However, the achievable charge rate (C-rate) is limited not only by the availability of infrastructure,...

AI Technical Summary

Problems solved by technology

This results in a voltage drop related to the C-rate of the charging process, causing overpotentials and associated electrolyte degradation, or simply a loss of capacity because the cut-off voltage will be reached earlier

Furthermore, long-term charging at high C rates leads to an increase in battery temperature with a corresponding increase in temperature-related degradation processes in the battery

Although described herein with respect to Li-ion cells, similar concentration gradients can occur in any electrochemical cell, causing similar problems of cell degradation and suboptimal capacity

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