METHOD FOR SYMMETRIZING AN ENERGY STORAGE SYSTEM
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Abstract
In a method for balancing an energy storage system, a capacitance of capacitive storage modules of a series circuit of capacitive storage modules is determined. The capacitive storage modules are connected to a balancing device to allow control of a charge of each of the capacitive storage modules via a flow of current between the balancing device and the capacitive storage modules. For each of the capacitive storage modules a module charge is determined from a voltage of the capacitive storage module and a predefined balancing voltage. A reference charge is determined from the module charges of the capacitive storage modules, and a balancing charge is determined for each of the capacitive storage modules from the reference charge and the module charge of the capacitive storage module. The charge of the capacitive storage modules is controlled by exchanging the balancing charge between the capacitive storage module and the balancing device.
31 Citations
41 Claims
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1-18. -18. (canceled)
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19. A method for balancing an energy storage system, comprising:
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determining a capacitance of individual capacitive storage modules of a series circuit of capacitive storage modules, with the capacitive storage modules connected to a balancing device to allow control of a charge of each of the capacitive storage modules via a flow of current between the balancing device and the capacitive storage modules; determining for each of the individual capacitive storage modules a module charge from a voltage of the capacitive storage module and a predefined balancing voltage; determining a reference charge from the module charges of the capacitive storage modules; determining for each of the individual capacitive storage modules a balancing charge from the reference charge and the module charge of the capacitive storage module; and controlling the charge of the capacitive storage modules by exchanging the balancing charge between the capacitive storage module and the balancing device, - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A control device, comprising an input for measuring a voltage of a plurality of capacitive storage modules of a series circuit of capacitive storage modules, with the capacitive storage modules connected to a balancing device, said control device configured to generate a control command as a function of the voltage to allow control of a charge exchange between the capacitive storage modules and the balancing device.
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33. An energy storage arrangement, comprising:
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an energy storage system including a series circuit of least two capacitive storage modules, each said capacitive storage module including a capacitor, a double-layer capacitor or a lithium capacitor; a balancing device connected to each of the capacitive storage modules such as to allow control of a charge of each capacitive storage module via a flow of current between the balancing device and the capacitive storage module; and a control device comprising an input for measuring a voltage of a plurality of capacitive storage modules of a series circuit of capacitive storage modules, with the capacitive storage modules connected to a balancing device, said control device configured to generate a control command as a function of the voltage to allow control of a charge exchange between the capacitive storage modules and the balancing device. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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- 40. A vehicle, comprising an energy storage arrangement, said energy storage arrangement comprising an energy storage system including a series circuit of least two capacitive storage modules, each said capacitive storage module including a capacitor, a double-layer capacitor or a lithium capacitor, a balancing device connected to each of the capacitive storage modules such as to allow control of a charge of each capacitive storage module via a flow of current between the balancing device and the capacitive storage module, and a control device comprising an input for measuring a voltage of a plurality of capacitive storage modules of a series circuit of capacitive storage modules, with the capacitive storage modules connected to a balancing device, said control device configured to generate a control command as a function of the voltage to allow control of a charge exchange between the capacitive storage modules and the balancing device.
Specification