Patent ID: 8570001

Claim:
An apparatus for charging and for charge monitoring of a rechargeable battery, comprising: a charging circuit which includes the rechargeable battery and a charging device for charging the rechargeable battery, and a measurement device, wherein the measurement device includes a device for determining the rechargeable-battery current and the state of charge of the rechargeable battery; and a control device which compares a value that is proportional to the rechargeable-battery current with a set value, and controls the charging device by adjusting the rechargeable-battery current until a difference between the value that is proportional to the rechargeable-battery current and the set value disappears, wherein the control device contains a regulator unit and a control signal converter connected to it, wherein the control signal converter contains a digital-to-analog converter, and wherein the digital-to-analog converter provides an analog control signal to control the charging device.