Battery charger
First Claim
1. A battery charger having a capacitance input (C) for inputting the rated capacitance of a battery (12) to be charged, having a charge detector (14) for detecting the charge quantity (Ah) introduced during the charging, and having a charge comparator (15), which compares the detected charge quantity (Ah) with the input capacitance and if they agree generates a first shutoff signal (A), which terminates the charging operation, and a comparator, which compares the actual charging voltage value (UL) with a predetermined limit voltage (Umax) and which generates a second shutoff signal that terminates the charging operation if the actual charging voltage value (UL) attains the limit value, characterized in that a charge controller (13) is provided, and the charge controller (13) monitors the actual charging voltage value (UL) for plausibility in that the charge controller (13) assesses the actual charging voltage value as a function of the charging time, so that if the actual charging voltage value already attains the limit voltage after a short time, a battery that has come to have high impedance can be detected and the charging operation can be terminated.
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Accused Products
Abstract
A battery charger is proposed which has a capacitance input (C) for inputting the rated capacitance of the battery (12) to be charged. A charge detector (14) detects the charge quantity (Ah) introduced during the charging. A charge comparator (15) generates a shutoff signal (A), which terminates the charging operation if the charge quantity (Ah) agrees with the input capacitance.
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Citations
9 Claims
- 1. A battery charger having a capacitance input (C) for inputting the rated capacitance of a battery (12) to be charged, having a charge detector (14) for detecting the charge quantity (Ah) introduced during the charging, and having a charge comparator (15), which compares the detected charge quantity (Ah) with the input capacitance and if they agree generates a first shutoff signal (A), which terminates the charging operation, and a comparator, which compares the actual charging voltage value (UL) with a predetermined limit voltage (Umax) and which generates a second shutoff signal that terminates the charging operation if the actual charging voltage value (UL) attains the limit value, characterized in that a charge controller (13) is provided, and the charge controller (13) monitors the actual charging voltage value (UL) for plausibility in that the charge controller (13) assesses the actual charging voltage value as a function of the charging time, so that if the actual charging voltage value already attains the limit voltage after a short time, a battery that has come to have high impedance can be detected and the charging operation can be terminated.
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9. A method for charging a battery, in which the charge quantity (Ah) introduced during the charging is detected and compared with the rated capacitance of the battery to be charged, and if they agree the charging operation is terminated, and the actual charging voltage value (UL) is compared with a predetermined limit voltage (Umax), and the charging operation is terminated if the actual charging voltage value (UL) exceeds the limit value (Umax), characterized in that the actual charging voltage value (UL) is monitored for plausibility, in that the actual charging voltage value is assessed as a function of the charging time, so that if the actual charging voltage value already attains the limit voltage after a short time, a battery that has come to have high impedance can be detected and the charging operation can be terminated.
Specification