Battery pack, method and electric hand tool

摘要

The pack has rechargeable battery cells e.g. lithium cells connected in a rechargeable battery housing and arranged in series. An electronic unit for controlling voltage of the cells is connected with the cells. A multiplex arrangement is provided between the cells and the unit. The multiplex arrangement measures voltage values of the cells cyclically one after another and then provides received values to the unit. An independent claim is also included for a method of controlling voltages of rechargeable battery cells that are arranged in series in a rechargeable battery pack.