Circuit For A Small Electric Appliance With An Accumulator And Method For Measuring A Charging Current
First Claim
Patent Images
1. A circuit for a small electric appliance, comprising:
- a battery (B);
a control circuit (uC) for measuring the charging current of the battery (B);
a DC-DC converter (DC/DC) which supplies the control circuit (uC) from the battery; and
a current sensing resistor (R1), whose one end lies at a reference potential and whose other end is connected to the battery (B);
wherein the control circuit (uC) has a terminal which is at reference potential, and a measurement input which is related to the reference potential.
1 Assignment
0 Petitions
Accused Products
Abstract
A circuit for a small electric appliance is disclosed. The circuit includes a battery (B); a control circuit (uC) for measuring the charging current of the battery (B); a DC-DC converter (DC/DC) which supplies the control circuit (uC) from the battery; and a current sensing resistor (R1), whose one end lies at a reference potential and whose other end is connected to the battery (B). The control circuit (uC) has a terminal which is at reference potential, and a measurement input which is related to the reference potential.
10 Citations
8 Claims
-
1. A circuit for a small electric appliance, comprising:
-
a battery (B); a control circuit (uC) for measuring the charging current of the battery (B); a DC-DC converter (DC/DC) which supplies the control circuit (uC) from the battery; and a current sensing resistor (R1), whose one end lies at a reference potential and whose other end is connected to the battery (B); wherein the control circuit (uC) has a terminal which is at reference potential, and a measurement input which is related to the reference potential. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for measuring a charging current of a battery, comprising:
-
providing a current sensing resistor (R1) and a control circuit (uC); and supplying the control circuit (uC) from a DC-DC converter (DC/DC) and at least one further load from the battery (B); wherein the control circuit (uC) measures the charging current only when the at least one further load is switched off or the control circuit (uC) provides the measured charging current with at least one correction value when the at least one further load is not switched off during the current measurement.
-
Specification