Battery charging unit for a medical appliance

Details Battery charging unit for a medical appliance Battery charging unit for a medical appliance

H - Electricity

02

J

320/2.5

H02J 7/04 (2006.01) H02J 7/02 (2006.01) H02J 7/18 (2006.01)

Patent

CA 2004989

Abstract of the Disclosure: A battery charging unit for a medical appliance, preferably an inhalator, includes a transformer having a high-voltage side to be connected to a mains voltage and having a low- voltage side. A rectifier is connected lo the low-voltage side of the transformer. A charge current circuit is con- nected to the rectifier for charging a battery. A timing control is connected to the charge current circuit for switching a charge current to a value being safe for long-term charging after a predetermined period of time at an initially higher value. A test key is connected to the charge current circuit for interrupting charging of the battery and loading the battery with a given maximum current requirement for a given period of time. The voltage of the battery under load is measured and compared with a predeter- mined reference voltage after the test key is actuated. A control light signals if the reference voltage is exceeded. LAG:cdt

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