Equalizer for series of connected battery strings
First Claim
1. A equalizer, wherein said equalizer comprising:
- a transformer, which is constituted by a primary winding and a secondary winding, said primary winding being constituted by a plurality of windings with the identical number of windings and the identical polarity, the number of windings of said secondary winding being identical to the sum of the number of windings of said primary winding; and
a switch means, said switch means is constituted by a plurality of switch devices, each of said switch devices of said switch means being coupled with said plurality of windings in identical polarity separately in said primary winding;
wherein when said plurality of switch devices being driven by a control signal simultaneously, said plurality of winding in said primary winding becoming a primary winding and a secondary winding to each other.
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Accused Products
Abstract
A terminal voltage equalization circuit is used to equalize the terminal voltage of the series of connected battery strings so that each battery in the series of connected battery strings can be equally charged. When voltage of a certain battery in the battery string is higher than that of the other batteries, the battery voltage sensing and controlling circuit will output a high frequency signal to drive the switch devices to transit power from the high voltage batteries to the low voltage batteries by transformer. By the high switching switches, the charging currents through the batteries with high terminal voltages can be reduced, the charging currents through the batteries with low terminal voltages can be enhanced, and therefore the damages to the batteries due to overcharging can be avoided and speedy balance of the terminal voltages between each battery can be achieved.
131 Citations
29 Claims
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1. A equalizer, wherein said equalizer comprising:
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a transformer, which is constituted by a primary winding and a secondary winding, said primary winding being constituted by a plurality of windings with the identical number of windings and the identical polarity, the number of windings of said secondary winding being identical to the sum of the number of windings of said primary winding; and
a switch means, said switch means is constituted by a plurality of switch devices, each of said switch devices of said switch means being coupled with said plurality of windings in identical polarity separately in said primary winding;
whereinwhen said plurality of switch devices being driven by a control signal simultaneously, said plurality of winding in said primary winding becoming a primary winding and a secondary winding to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An equalizer of connected battery strings, comprising:
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a series of connected battery string apparatus, which is comprising a plurality of series of batteries, wherein one end of said series of connected battery string apparatus being coupled with the positive terminal of a current source, and the other end of said series of connected battery string apparatus being coupled with the negative terminal of said current source;
a battery voltage sensing and controlling apparatus, comprising a plurality of high frequency signal output ports and a plurality of input ports, wherein said plurality of input ports being coupled with said plurality of batteries separately;
an equalizer, comprising;
a transformer, which is constituted by a primary winding and a secondary winding, said primary winding being constituted by a plurality of windings with the identical number of windings and the identical polarity, the number of windings of said secondary winding being identical to the sum of the number of windings of said primary winding; and
a switch means, which is constituted by a plurality of switch devices, each of said switch devices of said switch means being coupled with said plurality of windings and said plurality of high frequency signal output ports in identical polarity in said primary winding;
whereinwhen said plurality of switch devices being driven by a high frequency control signal simultaneously from said battery voltage sensing and controlling apparatus, then said plurality of windings in said primary winding becoming a primary winding and a secondary winding to each other. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification