Importance

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Abstract

The present invention discloses a battery charging device adapted to be connected to a battery having a positive and a negative terminal for supplying a direct current to the positive terminal of the battery. This device comprises an alternating current supply means, such as a transformer, connected to a power supply for providing alternating current, such as a wall socket. A charge current supply controller means is connected to the secondary winding of the transformer. The charge current supply controller means comprises two pairs of silicon controlled rectifiers ('SCR') and a SCR interface circuit. The secondary of the transformer is also connected to the SCRs. A processor which is connected to the SCR interface circuit determines which pair of SCRs will supply direct current to the battery. The processor, which is connected to the output of the polarity sensing detector, decides which pair of SCRs will be the conduit for the current to the battery based on the output of the polarity sensing detector. The polarity sensing detector is in communication with the battery. The SCRs are adapted to be connected to the positive and negative terminals of the battery for supplying direct current to the positive terminal of the battery. Once the polarity of the connection has been determined and the direct current will flow to the positive terminal of the battery, the processor utilizes software to determine whether a battery can accept charge.

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First Claim