Rechargeable battery with monitoring circuit

摘要

In such a device system the battery unit (10) has a monitoring circuit (14) which detects at least one operating parameter of the battery unit (10) and prepares a control signal depending on the operating parameter for switch means (25, 31) which control the charge or discharge process of the battery unit (10) . These switch means (25, 31) are located in the electrical device (20) and charger (30) respectively. The battery unit (10) transfers the control signal to the switch means (25, 31) in the electrical device (20) and charger (30) . By this measure of relocating the switch means (25, 31) from the battery unit (10) to the electrical device (20) or charger (30), the heat development in the battery unit (10) and its size are reduced.