Security concept for integrating a battery into an inverter
First Claim
1. An inverter apparatus comprising:
- a DC voltage link,an input stage coupled to the DC voltage link and configured to receive DC electric power from a DC power generator for loading the DC voltage link,a DC/AC converter coupled to the DC voltage link and configured to feed AC electric power into a power grid,a bidirectional connection configured to couple a battery to the DC voltage link (6), to load the battery out of the DC voltage link in a first direction, and to load the DC voltage link out of the battery in a second, opposite direction, anda controller configured to operate the DC/AC converter and, dependent on present values of relevant parameters of the battery, to selectively operate the bidirectional connection in the first direction or the second direction,wherein the controller is coupled to an interface configured to receive the present values of the relevant parameters of the battery from a battery monitoring unit associated with the battery,wherein the relevant parameters of the battery issued by the battery monitoring unit and received by the interface include working data related to at least a state of charge of the battery and safety data indicating a safety state of the battery,wherein the controller is configured to consider the working data in operating the bidirectional connection,wherein the controller is configured to be commanded by the safety data (20) in operating the bidirectional connection,wherein the interface comprises separate interface units configured to receive the working data and the safety data, respectively, andwherein the controller is configured to receive the safety data as a safety signal that indicates a safety of the battery only when a signal level of the safety signal is within a predetermined safety level range and/or when a signal repetition frequency of the safety signal is within a predetermined safety frequency range.
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Accused Products
Abstract
An inverter apparatus includes an input stage receiving DC electric power from a DC power generator for loading a DC voltage link, a DC/AC converter connected to the DC voltage link and feeding AC electric power into a power grid. The apparatus further includes a bidirectional connection for loading a battery out of the DC voltage link and for loading the DC voltage link out of the battery, and a controller operating the DC/AC converter and the bidirectional connection. The controller receives present values of relevant parameters of the battery including working data at least related to a state of charge and safety data indicating a safety state of the battery from a battery monitoring unit. The controller, in operating the bidirectional connection, considers the working data and is commanded by the safety data.
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Citations
22 Claims
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1. An inverter apparatus comprising:
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a DC voltage link, an input stage coupled to the DC voltage link and configured to receive DC electric power from a DC power generator for loading the DC voltage link, a DC/AC converter coupled to the DC voltage link and configured to feed AC electric power into a power grid, a bidirectional connection configured to couple a battery to the DC voltage link (6), to load the battery out of the DC voltage link in a first direction, and to load the DC voltage link out of the battery in a second, opposite direction, and a controller configured to operate the DC/AC converter and, dependent on present values of relevant parameters of the battery, to selectively operate the bidirectional connection in the first direction or the second direction, wherein the controller is coupled to an interface configured to receive the present values of the relevant parameters of the battery from a battery monitoring unit associated with the battery, wherein the relevant parameters of the battery issued by the battery monitoring unit and received by the interface include working data related to at least a state of charge of the battery and safety data indicating a safety state of the battery, wherein the controller is configured to consider the working data in operating the bidirectional connection, wherein the controller is configured to be commanded by the safety data (20) in operating the bidirectional connection, wherein the interface comprises separate interface units configured to receive the working data and the safety data, respectively, and wherein the controller is configured to receive the safety data as a safety signal that indicates a safety of the battery only when a signal level of the safety signal is within a predetermined safety level range and/or when a signal repetition frequency of the safety signal is within a predetermined safety frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operating an inverter apparatus that comprises:
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a DC voltage link, an input stage coupled to the DC voltage link, a DC/AC converter coupled to the DC voltage link, and a bidirectional connection coupled to the DC voltage link, the method comprising; connecting a DC power generator to the input stage and loading the DC voltage link with DC electric power received from the DC power generator; operating the DC/AC converter to feed AC electric power into a power grid; connecting a battery to the DC voltage link via the bidirectional connection; and dependent on present values of relevant parameters of the battery, operating the bidirectional connection to load the battery out of the DC voltage link, or to load the DC voltage link out of the battery; receiving the present values of the relevant parameters of the battery from a battery monitoring unit associated with the battery, wherein the received relevant parameters of the battery include working data related to at least a state of charge of the battery and safety data indicating a safety state of the battery; considering the working data in operating the bidirectional connection; following commands by the safety data in operating the bidirectional connection; receiving the working data and the safety data via separate interface units; and receiving the safety data as a safety signal that indicates safety of the battery only when a signal level of the safety signal is within a predetermined safety level range and/or when a signal repetition frequency of the safety signal is within a predetermined safety frequency range. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification