In at least one embodiment, a power management module measures different observable quantities of a battery, such as terminal voltage or current, and measures a voltage response of the battery based upon the measurements. The measured voltage response of t...

An accurately and precisely calculation of the state of charge of a sodium-sulfur battery may be made by determining a state of charge Qr according to expression (1) given below even if the sodium-sulfur battery is applied to compensate for fluctuations in...

Method of determining the identity of a battery pack (62) comprising the steps of discharging a capacitive component (82) of a battery pack circuit of the battery pack; initiating recharging of the capacitive component after the capacitive component is sub...

An electric power unit (10) selectable and usable for a plurality of electric sources (20a..20n), including an electric source-discriminating device (12) to detect attached electric sources of the plurality of electric sources, an electric source-selecting...

The present invention relates to a device and a method for electrically recognizing if a battery is of a rechargeable or non-rechargeable type. The invention is also related to a portable electronic device equipped with a charging device according to the i...