Charging device and algorithm for charging nimh batteries

Abstract

A method of charging or recharging a NiMH battery. The disclosure further relates to a charging station and a system. The object of the disclosure is to provide a charging algorithm that charges the battery in a relatively short time and at the same time is relatively gentle as regards its life time degradation. The problem is solved in that the method includes a) providing a constant charge current until a predefined threshold voltage is reached; b) when the predefined threshold voltage is reached, keeping the voltage constant by reducing the charge current; and wherein the predefined threshold voltage is determined depending on the temperature of the battery. This has the advantage of providing a charging algorithm with a compromise between charging speed and battery life time. The disclosure may, e.g., be used for the portable communication devices, e.g. listening devices, such as hearing instruments.

Dependencies are inferred from the claim text.