Battery equalization circuits for series charging/discharging and controlling methods thereof
First Claim
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1. A battery equalization circuit, comprising:
- a balanced charging/discharging circuit, comprising;
a converter; and
a balance circuit, comprising;
a set of input terminals;
plural sets of output terminals;
plural switches; and
a coupled inductor having a primary winding and plural secondary windings respectively series-connected to the plural switches, wherein each of the plural sets of output terminals is connected to a respective one of the plural switches and a respective one of the plural secondary windings; and
a set of series-connected batteries having plural batteries, each of which has a positive terminal and a negative terminal, wherein each of the plural sets of output terminals is connected to the positive and the negative terminals of a respective one of the plural batteries, and the set of input terminals is in one of two states being coupled to and being series-connected to the converter to cause a branch current to flow through the plural secondary windings so as to balance the set of series-connected batteries.
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Abstract
Battery equalization circuits for series charging/discharging and controlling methods thereof are provided. The provided circuit includes a set of series-connected batteries, a switching converter and a magnetic element coupled balance circuit including a magnetic element coupled to the switching converter, wherein the magnetic element takes a branch current from the switching converter to the series-connected batteries so as to cause the set of series-connected batteries to reach a balance.
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Citations
16 Claims
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1. A battery equalization circuit, comprising:
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a balanced charging/discharging circuit, comprising; a converter; and a balance circuit, comprising; a set of input terminals; plural sets of output terminals; plural switches; and a coupled inductor having a primary winding and plural secondary windings respectively series-connected to the plural switches, wherein each of the plural sets of output terminals is connected to a respective one of the plural switches and a respective one of the plural secondary windings; and a set of series-connected batteries having plural batteries, each of which has a positive terminal and a negative terminal, wherein each of the plural sets of output terminals is connected to the positive and the negative terminals of a respective one of the plural batteries, and the set of input terminals is in one of two states being coupled to and being series-connected to the converter to cause a branch current to flow through the plural secondary windings so as to balance the set of series-connected batteries. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A battery equalization circuit, comprising:
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a set of series-connected batteries; a switching converter; and a magnetic element coupled balance circuit including a magnetic element coupled to the switching converter, wherein the magnetic element obtains a branch current from the switching converter, the branch current flows to the set of series-connected batteries so as to cause the set of series-connected batteries to reach a balance, the branch current is used to cause the set of series-connected batteries to perform one of a charge and a discharge so as to reach the balance, the battery equalization circuit for series charging/discharging is selected from a group consisting of a battery equalization circuit for series charging, a battery equalization circuit for series discharging and a battery equalization circuit for series charging and discharging, the magnetic element is one selected from a group consisting of a coupled inductor, a current transformer and a voltage transformer, the set of series-connected batteries includes plural battery banks, each of the plural battery banks has at least one battery, and the magnetic element has plural secondary windings. - View Dependent Claims (13, 14, 15, 16)
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Specification