Battery backup with bi-directional converter
First Claim
1. An electronic uninterruptible power supply unit, comprising:
- one or more battery connections;
a bi-directional converter in electrical communication with the one or more battery connections and arranged to (a) provide power at a first controlled voltage from the one or more battery connections as a boost converter when power is determined to not be available from a power source; and
(b) provide charge to the one or more battery connections by providing power at a second controlled voltage that is different from the first controlled voltage when power is determined to be available from the power source, wherein the bi-directional converter comprises first and second solid state switches arranged in series with each other, and at least one reactive element electrically coupled to the first and second solid state switches; and
third and fourth solid state switches connected in series with the one or more battery connections and arranged as a bi-directional switch that controls charging current for the one or more battery connections.
2 Assignments
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Accused Products
Abstract
An electronic uninterruptible power supply unit includes one or more battery connections. A bi-directional converter is in electrical communication with the one or more battery connections and arranged to (a) provide power at a first controlled voltage from the one or more battery connections as a boost converter when power is determined to not be available from a power source; and (b) provide charge to the one or more battery connections by providing power at a second controlled voltage that is different from the first controlled voltage when power is determined to be available from the power source. First and second MOSFET switches are connected in series with the one or more battery connections and arranged as a bi-directional switch that controls charging current for the one or more battery connections.
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Citations
22 Claims
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1. An electronic uninterruptible power supply unit, comprising:
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one or more battery connections; a bi-directional converter in electrical communication with the one or more battery connections and arranged to (a) provide power at a first controlled voltage from the one or more battery connections as a boost converter when power is determined to not be available from a power source; and
(b) provide charge to the one or more battery connections by providing power at a second controlled voltage that is different from the first controlled voltage when power is determined to be available from the power source, wherein the bi-directional converter comprises first and second solid state switches arranged in series with each other, and at least one reactive element electrically coupled to the first and second solid state switches; andthird and fourth solid state switches connected in series with the one or more battery connections and arranged as a bi-directional switch that controls charging current for the one or more battery connections. - View Dependent Claims (2, 3, 4, 9, 10, 11, 12, 21)
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5. An electronic uninterruptible power supply unit, comprising:
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one or more battery connections; a bi-directional converter in electrical communication with the one or more battery connections and arranged to (a) provide power at a first controlled voltage from the one or more battery connections as a boost converter when power is determined to not be available from a power source; and
(b) provide charge to the one or more battery connections by providing power at a second controlled voltage that is different from the first controlled voltage when power is determined to be available from the power source;first and second solid state switches connected in series with the one or more battery connections and arranged as a bi-directional switch that controls charging current for the one or more battery connections; and a controller that is arranged to cause the first solid state switch to operate in a linear region of a performance curve for the first solid state switch when charging one or more batteries by way of the battery connections. - View Dependent Claims (6, 7, 8, 22)
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13. An electronic uninterruptible power supply unit, comprising:
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one or more battery connections; a bi-directional converter in electrical communication with the one or more battery connections and arranged to (a) provide power at a first controlled voltage from the one or more battery connections as a boost converter when power is determined to not be available from a power source; and
(b) provide charge to the one or more battery connections by providing to the one or more battery connections power at a second controlled voltage that is different from the first controlled voltage when power is determined to be available from the power source; anda bi-directional switch connected in series with the one or more battery connections and arranged to (a) isolate the one or more battery connections from a power bus in response to a fault condition and (b) control charging current provided to the one or more battery connections. - View Dependent Claims (14, 15)
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16. A method for providing uninterruptible power, comprising:
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receiving first data indicating power is sensed to be present at a power bus; in response to receiving the first data; charging one or more batteries of a uninterruptible power supply unit by providing power from the power bus to the one or more batteries; controlling a charging voltage of the power provided to the one or more batteries using a bi-directional converter that is arranged as a buck converter during charging of the one or more batteries and as a boost converter during discharging of the batteries; controlling a current of the power provided to the one or more batteries by operating a first solid state switch in the linear region of a performance curve for the first solid state switch, the first solid state switch being connected in series with a second solid state switch. - View Dependent Claims (17, 18, 19, 20)
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Specification