Abstract: An energy storage system has at least one string of N modules, with each module including an energy storage device and a switching unit configured to for either serially connect the energy storage device into the string or to provide a short circuit. The energy storage system additionally includes a controller configured to perform (during on-load operation of the ESS) the steps of: changing the state of at least one switching unit of a module; measuring a current and a voltage at the energy storage device of the module, and determining characteristics of the energy storage device on a basis of at least a current through the string and change over time of the voltage measured before and after change of the state of the switching unit.

Abstract: Methods of operating a battery storage system having at least one multilevel converter with a plurality of battery modules are described. At least one battery module is selected out of the plurality of battery modules, the selected battery module is set in a bypass state for a specified time interval while maintaining multi-level converter operation, and then the selected battery module is released from the bypass state.

Abstract: A charging system for electric vehicles includes a number N of charge ports, each charge port having an interface for power exchange with an electric vehicle, a number M of modular energy storage direct converter systems (MESDCS), a switchable connection matrix, and a control system. The control system is configured to control an output voltage of each MESDCS. The switchable connection matrix is configured to connect one or more selected MESDCS with each given charge port and is further configured to connect one or more selected MESDCS with a power source.

Abstract: A battery storage system includes a multilevel-converter and a plurality of storage sections. Each storage section includes at least one holding means configured to hold at least one battery and at least one cable with at least one connector configured to electrically connect at least one of the batteries. The multilevel-converter includes a plurality of converter modules connected in series with each other and each converter module has at least one bypass switch configured to bypass the converter module and a battery switch configured to disconnect the battery at the same time when the bypass switch is on. The battery storage system further includes a controller with means for detecting the presence of a battery in each storage section and means for configuring the switches of the plurality of converter modules based on the presence of batteries such that the plurality of converter modules provides a required voltage.

Abstract: A failsafe battery storage system contains a plurality of strings of battery modules. Within each string, the battery modules are connected in series and the strings are connected in parallel. Over multiple periods of time different combinations of battery modules are in a connected state with batteries connected, while the remaining battery modules are in a bypass state such that battery modules with a higher power state have longer times in a connected state than battery modules with a lower power state. Further, over multiple periods of time different combinations of strings are in a connected state, while the remaining strings are in an open state, such that strings with a higher power state of their battery modules have longer times in a connected state than strings with a lower power state. The discussed storage system puts failed battery modules into a bypass state and/or failed strings of battery modules into an open state.

Abstract: A modular multilevel converter having a plurality of converter modules and a controller, which is configured to individually operate at least one of the converter modules by connecting and disconnecting its battery with a frequency to selectively increase and/or decrease the temperature of its battery. Each battery in the modular multilevel converter may be controlled individually.

Abstract: The invention discloses a module energy store converter system (10) comprising the following: at least one converter arm (12) comprising a plurality of standard modules (14) connected in series, and at least one extra-low voltage module (ELV module) (40), wherein the standard modules (14) and the ELV module can be connected such that inputs (48) of a transducer (46) of the ELV module can be optionally connected to the storage element (26) of an adjacent standard module (14) serially and/or anti-serially, or the transducer (46) can be decoupled from the storage element (26), and/or the inputs (48) of the transducer (46) can be optionally connected to the storage element of an adjacent standard module (14) in parallel, or the transducer (46) can be decoupled from the storage element (26).

Abstract: A battery storage system includes a multilevel-converter and a plurality of storage sections. Each storage section includes at least one holding means configured to hold at least one battery and at least one cable with at least one connector configured to electrically connect at least one of the batteries. The multilevel-converter includes a plurality of converter modules connected in series with each other and each converter module has at least one bypass switch configured to bypass the converter module and a battery switch configured to disconnect the battery at the same time when the bypass switch is on. The battery storage system further includes a controller with means for detecting the presence of a battery in each storage section and means for configuring the switches of the plurality of converter modules based on the presence of batteries such that the plurality of converter modules provides a required voltage.

Abstract: An energy storage system has at least one string of N modules, with each module including an energy storage device and a switching unit configured to for either serially connect the energy storage device into the string or to provide a short circuit. The energy storage system additionally includes a controller configured to perform (during on-load operation of the ESS) the steps of: changing the state of at least one switching unit of a module; measuring a current and a voltage at the energy storage device of the module, and determining characteristics of the energy storage device on a basis of at least a current through the string and change over time of the voltage measured before and after change of the state of the switching unit.

Abstract: A charging system for electric vehicles includes a number N of charge ports, each charge port having an interface for power exchange with an electric vehicle, a number of M modular energy storage direct converter systems, a switchable connection matrix, and a control system. The control system is configured to control an output voltage of each MESDCS. The switchable connection matrix is configured to connect one or more selected MESDCS with each given charge port and is further configured to connect one or more selected MESDCS with a power source.

Abstract: The invention discloses a module energy store converter system (10) comprising the following: at least one converter arm (12) comprising a plurality of standard modules (14) connected in series, and at least one extra-low voltage module (ELV module) (40), wherein the standard modules (14) and the ELV module can be connected such that inputs (48) of a transducer (46) of the ELV module can be optionally connected to the storage element (26) of an adjacent standard module (14) serially and/or anti-serially, or the transducer (46) can be decoupled from the storage element (26), and/or the inputs (48) of the transducer (46) can be optionally connected to the storage element of an adjacent standard module (14) in parallel, or the transducer (46) can be decoupled from the storage element (26).