초록 ▼

In a device where a load (R1) is powered by a battery (6), if a detection means (10) detects a battery voltage below a first threshold value (V1) defined by an adjustable voltage source (20), a first time-measurement means (40, 50) measure the time interval during which the load 6 is powered by the

In a device where a load (R1) is powered by a battery (6), if a detection means (10) detects a battery voltage below a first threshold value (V1) defined by an adjustable voltage source (20), a first time-measurement means (40, 50) measure the time interval during which the load 6 is powered by the battery (6), at a voltage below the first threshold value. If subsequently, the load is switched off and is not connected to the AC supply voltage via a power-supply circuit (1), the battery is discharged by a discharger (30). Second time-measurement means (40, 60) measure the time interval during which the discharger is operative until the detection means detect a battery voltage below a second threshold value (V2), which is defined by a voltage source (25) and at which the battery may be regarded as fully discharged or drained. After comparison of the sum of the time intervals measured by the first and the second time-measurement means with a reference value, correction means (70) correct the first threshold value in such a way that during a next discharge the time measured is more in agreement with the reference value.

대표청구항 ▼

A device comprising: a rechargeable battery connectable to a load for energizing said load, a power-supply circuit for charging the battery and/or energizing the load, first detection means for detecting a battery voltage substantially equal to a first voltage threshold value and with the battery co

A device comprising: a rechargeable battery connectable to a load for energizing said load, a power-supply circuit for charging the battery and/or energizing the load, first detection means for detecting a battery voltage substantially equal to a first voltage threshold value and with the battery connected to the load, a discharger for discharging the battery when the battery is subsequently disconnected from the load, second detection means for detecting a battery voltage substantially equal to a second voltage threshold value lower than the first threshold value, first time-measurement means for measuring a first time interval during which the battery is connected to the load after detection of the first threshold value and within a time period between detection of the first and second threshold values, second time-measurement means for measuring a second time interval during which the battery is disconnected from the load and the discharger is operative and within the time period between detection of the first threshold value and detection of the second threshold value, and correction means for correcting the first threshold value depending on a weighted sum of said first time interval and said second time interval as measured by the first and the second time-measurement means and relative to a reference value. A dry-shaving apparatus comprising: a motor, and a device comprising: a rechargeable battery connectable to the motor for energizing said motor, a power-supply circuit for charging the battery and/or energizing the motor, a first detection means for detecting a battery voltage substantially equal to a first voltage threshold value and with the battery connected to the motor, a discharger for discharging the battery when the battery is subsequently disconnected from the motor, second detection means for detecting a battery voltage substantially equal to a second voltage threshold value lower than the first threshold value, first time-measurement means for measuring a first time interval during which the battery is connected to the motor after detection of the first threshold value and within a time period between detection of the first and second threshold values, second time-measurement means for measuring a second time interval during which the battery is disconnected from the motor and the discharger is operative and within the time period between detection of the first threshold value and detection of the second threshold value, and correction means for correcting the first threshold value depending on a weighted sum of said first time interval and said second time interval as measured by the first and the second time-measurement means and relative to a reference value.