Robert Boschgmbh

Christel Sarfert

Jens Becker

Shashank Holavanahalli

Ganesh Susmitha

Eberhard Schoch

Christoph Kroener

Richard Schoettle

Triantafyllos Zafiridis

Joerg Poehler

Vincent Scharff

Shweta Vijay Pawar

Venkatrao Desai

Girish Yergol

A method for determining the capacity of an electrical energy storage unit with-in an electrical energy storage system. The system includes a plurality of electrical energy storage units and at least one switching means. The capacity of the electrical energy storage unit is determined from a current flow path of the system in the charging. The electrical energy storage unit is disconnected from the current flow path of the electrical energy storage system and a first voltage value is determined, the electrical energy storage unit is connected into the current flow path and charged and/or discharged, the electrical energy storage unit is disconnected from the current flow path again and a second voltage value is determined, and the capacity of the electrical energy storage unit is determined on based on the first voltage value and the second voltage value.

Method for determining the capacity of an electrical energy storage unit

A method, device, and computer-readable medium for operating an electrical energy store is provided. The electrical energy store includes a storage cell for storing electrical energy and a control unit. State variables of the electrical energy store are detected. The state variables are transmitted to a computation unit outside of the electrical energy store. The electrical energy store is operated based on operating parameters provided by the computation unit.

Method for operating an electrical energy store

An apparatus, computer program, storage medium and electrical energy storage system for operating an electrical energy storage unit. The procedure includes ascertaining at least one predefined first condition being checked which represents a use of the electrical energy storage unit and/or an accuracy of a mathematical model of the electrical energy storage unit. If the predefined first condition is satisfied, at least one value of a parameter of the mathematical model is ascertained and subsequently this parameter value is changed in the mathematical model. The electrical energy storage unit is subsequently operated with the changed mathematical model.

Procedure for operating an electrical energy storage unit and also corresponding apparatus, computer program, machine-readable storage medium and electrical energy storage unit

A method for ascertaining the state of charge of an electrical energy storage unit is described. In one example, the method includes ascertaining a voltage gradient at least based on a detected first voltage value of the electrical energy storage unit; comparing the ascertained voltage gradient with a predefined voltage gradient threshold value; and ascertaining the state of charge of the electrical energy storage unit depending on the comparison. A corresponding computer program, a corresponding machine-readable storage medium, a corresponding apparatus and a corresponding electrical energy storage system are also described.

Method for ascertaining the state of charge of an electrical energy storage unit

A method for diagnosis of a temperature control means () of a battery pack () that comprises a plurality of battery cells () and a plurality of temperature sensors for measuring temperatures of the individual battery cells (), the battery cells () being arranged side by side in the battery pack (), in a longitudinal direction () of the battery pack (), and mechanically connected to each another, and the battery cells () being arranged on the temperature control means () and mechanically and thermally connected to it. A battery management system, and/or a battery pack () may be configured to execute the method. A vehicle may be fitted with a battery pack that carries out the method.

Method for diagnosis of a temperature control means of a battery pack

A method is described for determining the capacity of an electrical energy storage unit, which method comprises the steps:

A method and a device for state sensing of a technical system, such as an energy store, in which performance quantities are measured and supplied to a state estimation routine, which determines the state variables characterizing the current system state using a model based on system-dependent model parameters and the measured performance quantities. To improve state estimation, the measured performance quantities may be supplied to a parameter estimation routine, which performs a use-dependent determination of the model parameters. To increase the quality of the estimation and reduce the calculating time and the memory requirements, a selection of state variables and/or parameters determined by estimation are performed depending on the dynamic response of the measured performance quantities.

Method and device for state sensing of technical systems such as energy stores

A method for detecting the status of an energy storage means ( ) provides that its actual values ( ) can be supplied to an estimate routine ( ). The actual values ( ) can be supplied in a decoupled manner to a model-based parameter estimator ( ) and to a filter ( ), which are subordinate to a monitoring level ( ). Parameterization values ( ) obtained are supplied to a predictor ( ) that extrapolates the behavior of the energy storage means ( ).

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Stuttgart, Germany

Christel Sarfert