Robert Boschgmbh

Eberhard Schoch

Juergen Binder

Juergen Motz

Ulrich Gottwick

Andreas Kellner

Frieder Keller

Peter Blessing

Peter Schubert

Richard Schoettle

Rainer Heinsohn

Rainer Saliger

Jan-Michael Graehn

Dirk Mentgen

Eberhard Holl

Christel Sarfert

Jens Intorp

Wolfgang Seils

Albert Geiger

Clemens Schmucker

Bernd Aupperle

Martin Holger Koenigsmann

Frank Baumann

Walter Schlagmueller

Christoph Wenger

Dieter Schramm

Bernd Frey

Burkhard Iske

Gunter Wiedemann

Arthur Schaefert

Sebastian Walenta

Turgut Karacay

Stefan Harport

Stefan Raeumschuessel

Amalinda Christina Post

Martin Brand

Juergen Schoettle

Oliver Keil

Felix Stoller

Joachim Kizler

Christian Schmitz

An electronic battery sensor and a method for determining an internal resistance of a battery, including at least one first detector for detecting measured values, and a battery model for ascertaining the internal resistance. Each measured value includes simultaneous information concerning at least two corresponding measured variables, in particular battery current and battery voltage, and every two successive measured values represents a measuring pair. The battery sensor includes at least one selector which is configured for selecting from a specified number of measuring pairs at least one measuring pair as a selection pair, and for providing the selection pair to the battery model in order to ascertain the internal resistance, the number of measuring pairs being greater than the number of selection pairs.

Electronic battery sensor and method for determining an internal resistance of a battery

In a method for starting a motor vehicle having a first vehicle electrical system, to which a battery of the motor vehicle is assigned, a second vehicle electrical system, to which an electric machine of the motor vehicle is assigned, and a DC/DC converter for connecting the two vehicle electrical systems, for starting, electrical energy from the second vehicle electrical system is converted via the DC/DC converter and transferred into the first vehicle electrical system if an actual value of at least one operating parameter of the battery falls below a setpoint value prior to a starting operation to be carried out.

Method and system for starting a motor vehicle

A device is described for ascertaining state variables and/or parameters of a mathematical energy accumulator model, in particular a battery model, that describes the electrical properties of the energy accumulator on the basis of various state variables and parameters, the mathematical energy accumulator model having correction equations by which the state variables and/or the parameters are corrected and adjusted to the actual operating performance of the energy accumulator. A particularly rapid and accurate compensation of the energy accumulator model may be achieved if the error between a measured battery performance quantity and the battery performance quantity calculated by the energy accumulator model, a differentiated component of the error and an integrated component of the error are calculated, the individual components are each weighted using a weighting factor and the weighted error components are taken into account in correction of a state variable and/or a parameter.

State and parameter estimator having integral and differential components for electrical energy accumulators

Methods for predicting a remaining lifetime of an electric energy storage mechanism, in particular a battery in a motor vehicle and devices for implementing such methods are described in which the remaining lifetime is determined by extrapolation with the help of a mathematical model of the energy storage mechanism. This remaining lifetime is defined as the time until reaching any definable limiting values for the minimum efficiency or minimum storage capacity. The remaining lifetime is indicated and, when the level falls below a preselectable threshold, a warning is displayed. The parameters of the energy storage mechanism are adapted continuously to the real values over the lifetime. The anticipated remaining lifetime is determined by extrapolation from the values for the efficiency and/or storage capacity, based on a specifiable charge state and temperature and the minimum values required for the particular application, these values being calculated at regular intervals on the basis of the model and saved.

Method for predicting the residual service life of an electric energy accumulator

A device for ascertaining the charge able to be drawn from an energy store, in particular a battery, up to a specified cutoff, is provided. A particularly precise charge prediction may be achieved if a mathematical energy store model is used, which mathematically represents the electrical properties of the energy store and with the aid of which a charge predictor calculates the charge able to be drawn in the case of a specified discharge current. The charge predictor is connected with an estimator for a state variable and parameter, which estimator ascertains state variables and/or parameters for the mathematical energy store model from current operating performance quantities of the energy store.

Method and device for determining the charge that can be drawn from an energy accumulator

A fuel cell system has at least one fuel cell unit for generating electrical energy, a unit for storing or dispensing electrical energy, an electrical consumer for consuming electrical energy, a diagnostic unit for ascertaining a functional capability of the at least one fuel cell unit during a diagnosis phase, and a control unit for determining an electrical power generated at least during the diagnosis phase by the at least one fuel cell unit.

Fuel cell system with fuel cell unit having means for storing or dispensing electrical energy

A state variable and parameter estimator for determining state variables and parameters of a mathematical energy storage model, especially of a battery model, which calculates the state variables and the parameters from operating variables of an energy storage device. A particularly simple estimation of the state variables and the parameters may be carried out if the state variable and parameter estimator includes a plurality of mathematical submodels which are valid for different working ranges and/or frequency ranges of the energy storage device.

State variable and parameter estimator comprising several partial models for an electrical energy storage device

Method of determining the state of charge soc of a battery, in particular a starting battery of a motor vehicle; the state of charge being calculated, in a first operating range, on the basis of a model calculation in which a measured and a calculated battery voltage U, U, are balanced, using feedback.

Method and arrangement for determination of the state of charge of a battery

Methods are described for determining the state of charge and/or the operability of a charge accumulator using estimates. The information, which is obtained at a least two different operating points or operating conditions of the energy accumulator, is taken into account in the estimates. The estimates are carried out with regard to an instantaneous and/or future state of charge and/or an instantaneous and/or future operability of the charge accumulator. Different methods are executed, depending on the operating point or operating condition. The methods may be run in a processor of a control unit.

Methods for determining the charge state and/or the power capacity of charge store

A circuit configuration for monitoring the state of charge of an accumulator battery, which is installed in particular in a motor vehicle, has a control unit that records and evaluates the flow of current out of or into the accumulator battery. The control unit is able to be shifted into a state with low current consumption (sleep mode), out of which it may be brought again by an activation signal. Moreover, a sensor is provided that emits a signal in response to a flow of current out of or into the accumulator battery.

Circuit arrangement for monitoring the state of charge of an accummulator

A method of determining the starting ability of a starter battery of an internal combustion engine, according to which a charge status of the starter battery is determined, which has an influence on starting ability. Also determined is a temperature which has an influence on starting ability, in particular the temperature of the starter battery. Moreover, an average voltage drop of the starter battery during a starting phase is calculated or determined, in particular during a turn-over phase of a starter motor, which is in an operative connection with the starter battery. The starting ability of the starter battery is estimated by comparing the calculated or determined average voltage drop with a threshold value.

Method and arrangement for determining the starting ability of a starter battery of an internal combustion engine

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 ( ).

Method for identifying the condition of an energy accumulator

Method and device for determining the charge status of a battery

A method for estimating the capacity of a battery, including the following steps: estimation of a steady-state voltage U , an internal resistance R and an internal voltage drop U of the battery, caused by a density difference in the battery acid; initialization of a model describing the battery in order to estimate the capacity, using estimated values U , R and U ; stimulation of the initialized model with predefined load current characteristic I , in particular a simulated load current characteristic of a consumer in operative connection with the battery, in order to obtain a voltage response U of the model, representing the battery voltage given the predefined load current characteristic; comparison of the voltage response U of the model with a predefinable, minimal battery voltage U , and estimation of the capacity of the battery by comparing U and U .

Method and system for determining the capacity of a battery

Electronic brake system with back-up control during central module

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Stuttgart, Germany

Eberhard Schoch