Device and method for charging and controlling the charge of a battery
AssigneeAms AG
InventorsTobias Bühler, Holger Haiplik
Life of this patent
Estimating the term…
Abstract
An apparatus and a method for charging and for charge monitoring of a rechargeable battery. A charging circuit contains a rechargeable battery (B) and a charging device (L) for charging the rechargeable battery. A measurement device (M) is arranged in the charging circuit and contains a device for determining the rechargeable-battery current and the state of charge of the rechargeable battery. A control device (R) compares a value that is proportional to the rechargeable-battery current with a set value, and controls the charging device.
Claims22
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.
A method for charging and for charge monitoring of a rechargeable battery, comprising the steps of:
- detecting a measurement signal for the rechargeable-battery current;
- producing a digital measurement signal from the measurement signal;
- processing the digital measurement signal in order to form a first current value for determining the state of charge of the rechargeable battery;
- processing the digital measurement signal in order to form a second current value;
- comparing the second current value with a reference value, and determining a difference result;
- producing a control manipulated variable from the difference result by a regulator;
- converting the control manipulated variable into an analog control signal by a control signal converter comprising a digital-to-analog converter;
- controlling a charging device for the rechargeable battery with the aid of the analog control signal;
- and
- adjusting the rechargeable-battery current until the difference result between the second current value and the reference value disappears.
An apparatus for charging and for charge monitoring of a rechargeable battery, comprising:
- a charging circuit which includes a 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 charging device contains a transistor,
- wherein the charging device contains a resistor for setting a bias voltage, and
- wherein the resistor is connected between a control terminal of the transistor and a first terminal of the transistor,
- the first terminal of the transistor is connected to a charging source, and
- the control device provides a control signal which is applied to the control terminal of the transistor.
Dependencies are inferred from the claim text.