System, method and device for monitoring capacitor cells connected in series in a capacitor module
First Claim
1. A system for monitoring a plurality of capacitor cells connected in series in a capacitor module which are used as electrical energy stores in an energy storage device and which can be charged in same by a charge current flowing through all the capacitor cells or discharged by a discharge current, the system comprising:
- a measuring unit which can determine the voltages applied to the individual capacitor cells by measuring voltages;
an evaluation unit configured to separately determine a nominal voltage for each of the capacitor cells by performing a separate calculation for each of the capacitor cells such that a separate nominal voltage value is determined for each of the capacitor cells; and
at least one discharge branch coupled to at least one of the capacitor cells and controllable by a discharge control unit which discharges the at least one of the capacitor cells onto the at least one discharge branch depending upon the set nominal voltage and the applied voltage.
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Accused Products
Abstract
A system for monitoring a plurality of capacitor cells connected in series in a capacitor module which are used as electrical energy stores in an energy storage device and which can be charged in same by a charge current flowing through all the capacitor cells or discharged by a discharge current. The system includes a measuring unit which can determine the voltages applied to the individual capacitor cells by measuring voltages, an evaluation unit which sets a nominal voltage for the capacitor cells, and at least one discharge branch connectable to each capacitor cell and controllable by a discharge control unit which discharges a respective capacitor cell onto said discharge branch depending upon the set nominal voltage and the applied voltage.
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Citations
21 Claims
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1. A system for monitoring a plurality of capacitor cells connected in series in a capacitor module which are used as electrical energy stores in an energy storage device and which can be charged in same by a charge current flowing through all the capacitor cells or discharged by a discharge current, the system comprising:
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a measuring unit which can determine the voltages applied to the individual capacitor cells by measuring voltages; an evaluation unit configured to separately determine a nominal voltage for each of the capacitor cells by performing a separate calculation for each of the capacitor cells such that a separate nominal voltage value is determined for each of the capacitor cells; and at least one discharge branch coupled to at least one of the capacitor cells and controllable by a discharge control unit which discharges the at least one of the capacitor cells onto the at least one discharge branch depending upon the set nominal voltage and the applied voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for monitoring a plurality of capacitor cells connected in series in a capacitor module which are used as electrical energy stores in an energy storage device and which can be charged in same by a charge current flowing through all the capacitor cells or discharged by a discharge current, the system comprising:
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a measuring unit which can determine the voltages applied to the individual capacitor cells by measuring voltages; an evaluation unit configured to determine a nominal voltage for each of the capacitor cells, wherein the nominal voltage is a mean voltage of the capacitor cells; and at least one discharge branch coupled to at least one of the capacitor cells and controllable by a discharge control unit which discharges the at least one of the capacitor cells onto the at least one discharge branch depending upon the set nominal voltage and the applied voltage. - View Dependent Claims (21)
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Specification