Method for determining health status of battery of e.g. electric vehicle, involves determining health status of battery from internal resistance, temperature, and state of charge of battery

摘要

The method involves determining (23) temperature and charging state of a battery, and loading (24) the battery with a current profile of predetermined intensity and duration. Internal resistance of the battery is determined (25) from the current profile and voltage response to the current profile, and the health status of the battery is determined (26) from its internal resistance, temperature and its state of charge, where an estimating table gives an estimate of the health status of the battery, and loading of the battery is performed during charging the battery.