Infineon Technologies Ag

Infineon Technologies Austria Ag

Lantiq Deutschland Gmbh

Intel Mobile Communications Gmbh

Pmdtechnotogies Ag

Stefano Marsili

Luca Bizjak

Werner Hoellinger

Christoph Sandner

Gerhard Maderbacher

Klaus Hoermaier

Andreas Berger

Robert Priewasser

Andreas Wiesbauer

Dietmar Straeussnigg

Guenter Hofer

Matteo Agostinelli

Christoph Unterrieder

Giuseppe Li Puma

Marc Tiebout

Edwin Thaller

Yossi Erlich

Manfred Punzenberger

Emanuele Bodano

Stefan Van Waasen

Volha Kharko Subotskaya

Kyrylo Cherniak

Yanzhong Dai

Akshay Misra

Michael Kropfitsch

Franz Michael Darrer

Joachim Pichler

Francesco Conzatti

Matthias Rose

Michael Augustin

Andrea Bevilacqua

Roman Riederer

Marc Kanzian

Dietmar Sträussnigg

Michael Lunglmayr

Luca Gori

Stylianos Perissakis

Martin Bacher

Raffaele Salerno

Harald Gietler

Filippo Rosetti

Stefano Dal Toso

Staffan Ek

Christian Winkler

Johannes Thielmann

Benno Ankele

A converter includes a switched capacitor circuit that includes at least one capacitor and a plurality of main switches to provide an output current in response to an input voltage applied to the switched capacitor circuit. The converter further includes one or more bypass transistor switches to selectively provide an additional output current. The converter includes a common controller that controls the plurality of main switches and the one or more bypass transistor switches.

Devices and methods for voltage regulation

In some examples, a device can be used for measuring the impedance of a first battery cell. The device includes a first analog-to-digital converter (ADC) and a second ADC. The device also includes a multiplexer configured to connect the first ADC to the first battery cell in a first instance and to connect the second ADC to a current sensor in the first instance. The current sensor is configured to sense current through the first battery cell. The multiplexer is also configured to connect the first ADC to the current sensor in a second instance and to connect the second ADC to the first battery cell in the second instance or in a third instance.

Impedance measurement using a multiplexer and analog-to-digital converters

In accordance with an embodiment, a method includes receiving, by at least one of a plurality of battery monitoring circuits a frequency synchronization signal and measurement frequency information from a host controller, wherein the at least one of the plurality of battery monitoring circuits is connected to at least one of a plurality of battery blocks; generating, by the at least one of the plurality of battery monitoring circuits, a periodic signal based on a clock signal having a clock frequency, the measurement frequency information, and the frequency synchronization signal; obtaining, by the at least one of the plurality of battery monitoring circuits, at least one measurement value of the at least one of the plurality of battery blocks using the periodic signal; and transmitting, by the at least one of the plurality of battery monitoring circuits, the at least one measurement value to the host controller.

Method of monitoring a battery, monitoring system and monitoring circuit

A method for measuring a complex impedance of a plurality of battery cells in a battery pack comprises controlling an excitation current through the plurality of battery cells in the battery pack; receiving, in a single common measurement circuit, a plurality of voltage signals corresponding to the plurality of battery cells; measuring the excitation current; and calculating a complex impedance of each of the battery cells in the plurality of battery cells based on the plurality of voltage signals and the measured excitation current in a single measurement cycle using either one analog-to-digital converter (ADC) per battery cell or two matched ADCs per battery cell.

Multi-cell AC impedance measurement system

A device for battery impedance measurement includes a switched capacitor network, a controller configured to operate the switched capacitor network to cause an alternating current to flow between a battery and an energy storage; and measurement circuitry configured to measure the alternating current flowing to or from the battery and a voltage across the battery.

Device and method for battery impedance measurement

Various examples relate to techniques of monitoring a reliability of a cell-impedance measurement of a battery cell. In one example, a device includes a first interface configured to inject an AC excitation current into a battery cell and a shunt resistor coupled in parallel to the battery cell. The device also includes a second interface configured to inject an AC test current into the shunt resistor. The device also includes analog-to-digital converters configured to measure a cell voltage across the battery cell associated with the AC excitation current, a shunt voltage across the shunt resistor associated with the AC excitation current and the shunt voltage across the shunt resistor associated with the AC test current.

Device and method for monitoring a reliability of a cell impedance measurement of a battery cell

A method is disclosed, which includes driving an alternating input current into a battery, measuring a voltage across the battery by a first measurement circuit to obtain a voltage measurement value, measuring a current through the battery by a second measurement circuit to obtain a current measurement value, and measuring a current through the battery using the first measurement circuit to obtain a further current measurement value. Further, the method includes calculating an impedance of the battery based on the current measurement value, the further current measurement value, and the voltage measurement value.

Battery impedance detection using voltage and current measurements

Devices and methods are provided related to modulated power supplies. The device includes an inductor. When a load is to be supplied with power, a terminal of the inductor is coupled to the load. When the load is not to be supplied with power, terminals of the inductor may be coupled with each other.

Modulated power supply

Methods and devices for determining at least one parameter of a model of a technical installation are provided. In this case, the parameters are updated on the basis of measurements as a function of an observation matrix. The observation matrix is prescribed as a function of the model and being able, if appropriate, to depend on a time variable which can be measured.

Method and device for determining a parameter of a model of a technical installation

A method and a temperature detection circuit are disclosed. An example of the method includes driving an alternating current with a first frequency into a battery and detecting an imaginary part of a battery impedance at the first frequency; driving an alternating current with a second frequency different from the first frequency into the battery and detecting an imaginary part of the battery impedance at the second frequency; and calculating an intercept frequency at which the imaginary part equals a predefined value at least based on the imaginary part obtained at the first frequency and the imaginary part obtained at the second frequency.

Battery temperature detection

Representative implementations of devices and techniques may minimize switching losses and voltage ripple in a switched capacitor de-de converter. A digital controller is used to control switching, based on an existing load. In some examples, the digital controller may insert a dead-time phase in a switching period, which may reduce voltage ripple for a low output load current. In other examples, the digital controller may adjust the conductance of a plurality of sub-switches, where the plurality of sub-switches may include one or more sub-switches that have a higher on-resistance than other sub-switches. For example, a sub-switch may have an on-resistance that is a multiple of the on-resistance of other sub-switches.

Digital controller for switched capacitor DC-DC converter

In an example, a device for operating a switching converter is configured to determine a set of perturbed duty cycle values for a converter. A perturbation sequence is superimposed simultaneously onto a duty cycle value for each phase of the converter to form the set of perturbed duty cycle values. The device is further configured to determine an output voltage of the converter that occurs when the converter operates based on the set of perturbed duty cycle values, determine a coefficient vector of system parameters for the converter based on the output voltage and the set of perturbed duty cycle values, and tune a controller based on the coefficient vector. The duty cycle value for each phase of the converter is based on a respective command duty cycle value of a set of command duty cycle values output by the controller.

Controller tuning using perturbation sequence

A method of operating a switched-mode power supply (SMPS) includes starting up the switched-mode power supply by determining a rate of increase of a duty cycle of a pulse width modulated (PWM) signal based on an input voltage and a switching frequency of the SMPS; and generating the PWM signal having the duty cycle in accordance with the determined rate of increase.

System and method for starting a switched-mode power supply

Representative implementations of devices and techniques minimize switching losses in a switched capacitor de-de converter. Variable frequency control, including Pulse frequency modulation, is used to control switching based on an existing load. As an example, a system may include a direct current to direct current converter (dc-dc converter) including an energy storage element, switches coupled to the energy storage element, and a digital controller arranged to modulate a switch timing of at least one switch of the switches by adjustment of a transition of a signal pulse provided to adjust an impedance of the at least one switch based on a load coupled to an output of the dc-dc converter.

Pulse frequency modulation control for switched capacitor DC-DC converter

Growing community of inventors

Faak am See, Austria

Stefano Marsili