TOPOLOGY AND CONTROL STRATEGY FOR HYBRID STORAGE SYSTEMS
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Accused Products
Abstract
A hybrid battery charging device includes: input terminals for connecting a photovoltaic panel or other current sources; first battery connections for connecting a lead-acid battery; second battery for connecting a high-cycle chemical battery; a two-way DC/DC converter having a first set of terminals connected with the second battery connections, and a second set of terminals connected with the first battery connections, an input of the second set of terminals being derived from the input terminals; a charge-and-discharge control system which is connected to the DC/DC converter via respective control lines; and output terminals for connecting a load, an input to the output terminals being derived from the first battery connections.
40 Citations
48 Claims
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1-24. -24. (canceled)
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25. A hybrid battery charging device, comprising:
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input terminals for connecting a photovoltaic panel; first battery connections for connecting a lead-acid battery; second battery connections for connecting a high-cycle chemical battery; a two-way DC/DC converter having (i) a first set of terminals connected with the second battery connections and (ii) a second set of terminals connected with the first battery connections; a charge-and-discharge control system connected to the DC/DC converter via respective control lines; and output terminals for connecting a load, wherein an input to the output terminals is de-rived from the first battery connections. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A hybrid storage system, comprising:
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a high-cycle chemical battery; and a hybrid battery charging device including; input terminals for connecting a photovoltaic panel; first battery connections for connecting a lead-acid battery; second battery connections connected to the high-cycle chemical battery; a two-way DC/DC converter having (i) a first set of terminals connected with the second battery connections and (ii) a second set of terminals connected with the first battery connections; a charge-and-discharge control system connected to the DC/DC converter via respective control lines; and output terminals for connecting a load, wherein an input to the output terminals is de-rived from the first battery connections. - View Dependent Claims (36, 37, 38, 39)
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40. A method for charging a lead-acid battery and a high-cycle chemical battery of a hybrid storage system by an electric power source, comprising:
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charging the lead-acid battery in a first battery charging phase until the lead-acid battery has reached a first predetermined state of charge; charging the lead-acid battery and the high-cycle chemical battery in a topping/boost/equalization phase until the lead-acid battery has reached a second predetermined state of charge; and charging the high-cycle chemical battery in a third battery charging phase during which an essentially constant system voltage is applied to system terminals of the lead-acid battery and the system voltage is converted into a charging voltage at terminals of the high-cycle chemical battery. - View Dependent Claims (41, 42, 43, 44, 45)
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46. A method for discharging a lead-acid battery and a high-cycle chemical battery of a hybrid storage system, comprising:
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supplying a load with power by discharging the high-cycle chemical battery via system terminals of the lead-acid battery and maintaining the voltage at the system terminals essentially equal to a maximum open circuit voltage of the lead-acid battery until the output voltage of the high-cycle chemical battery has reached an end-of-discharge voltage of the high-cycle chemical battery; and discharging the lead-acid battery until the voltage of the lead-acid battery has reached an end-of-discharge voltage of the lead-acid battery. - View Dependent Claims (47)
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48. A non-transitory, computer-readable data storage medium storing a computer program having program codes which, when executed on a computer, perform a method for charging a lead-acid battery and a high-cycle chemical battery of a hybrid storage system by an electric power source, the method comprising:
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charging the lead-acid battery in a first battery charging phase until the lead-acid battery has reached a first predetermined state of charge; charging the lead-acid battery and the high-cycle chemical battery in a topping/boost/equalization phase until the lead-acid battery has reached a second predetermined state of charge; and charging the high-cycle chemical battery in a third battery charging phase during which an essentially constant system voltage is applied to system terminals of the lead-acid battery and the system voltage is converted into a charging voltage at terminals of the high-cycle chemical battery.
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Specification