Charge equalization apparatus
First Claim
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1. A charge equalization apparatus, comprising:
- N transformers connected in parallel to N respective series-connected batteries, and configured to each include one primary winding and two secondary windings and to charge batteries, other than the overcharged batteries, with energy discharged from the overcharged batteries;
a first charge storage device and a second charge storage device each connected in parallel to the N series-connected battery and the N transformer;
a first redistribution switch and a second redistribution switch connected in series between the first and second charge storage devices and the N transformers;
charge control switches each connected to both ends of a primary winding of each of the N transformers;
N first semiconductor switching elements each connected to a first secondary winding of each of the N transformers and a positive electrode of each of the N batteries; and
N second semiconductor switching elements each connected to a second secondary winding of each of the N transformers and a positive electrode of each of the N batteries.
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Abstract
The present invention relates to a charge equalization apparatus, which allows the primary and secondary windings of a transformer to be easily fabricated, can control the flow of charge to batteries depending on the charged states of series-connected batteries, and can prevent overcurrent from flowing into a battery currently being charged.
16 Citations
11 Claims
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1. A charge equalization apparatus, comprising:
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N transformers connected in parallel to N respective series-connected batteries, and configured to each include one primary winding and two secondary windings and to charge batteries, other than the overcharged batteries, with energy discharged from the overcharged batteries; a first charge storage device and a second charge storage device each connected in parallel to the N series-connected battery and the N transformer; a first redistribution switch and a second redistribution switch connected in series between the first and second charge storage devices and the N transformers; charge control switches each connected to both ends of a primary winding of each of the N transformers; N first semiconductor switching elements each connected to a first secondary winding of each of the N transformers and a positive electrode of each of the N batteries; and N second semiconductor switching elements each connected to a second secondary winding of each of the N transformers and a positive electrode of each of the N batteries. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification