Robert Boschgmbh

Samsung Sdi Co., Inc.

Continental Automotive Gmbh

Sven Bergmann

Chrysanthos Tzivanopoulos

Stefan Butzmann

Lisa Lorenz

Andre Boehm

Sarmimala Hore

Stefan Wickert

Andreas Ruehle

Alexander Reitzle

Jochen Weber

Peter Birke

Michael Keller

Gergely Galamb

Hans-Georg Schweiger

Thomas Schaedlich

Joerg Schneider

Anne Heubner

Michael Schiemann

Johannes Swoboda

Patrick Kaupp

Eduard Reimer

Kuen Cheuk Leung

Karsten Thoelmann

Stefan Ziegler

Volker Geissinger

The invention relates to a shunt resistor () for detecting the status of an electrical energy storage unit (), wherein the shunt resistor () comprises a first layer (), a second layer () and a third layer (). According to the invention, the layers () are arranged in a layered manner in a stacking direction (V), wherein the second layer () is arranged between the first layer () and the third layer (), and wherein the layers () are in physical contact with one another at one of the sides having the greatest respective surface area, and wherein the layers () are arranged at least partially overlapping.

Shunt resistor for detecting the status of an electrical energy storage unit

A method for detecting an internal short circuit in a first electrical energy storage unit of an electrical energy storage device is described, wherein the electrical energy storage device comprises at least two electrical energy storage units including a first electrical energy storage unit and a second electrical energy storage unit electrically connected in parallel in the electrical energy storage device, the method including recording an electric current flowing into or out of the first electrical energy storage unit, recording an electric current flowing into or out of the second electrical energy storage unit, determining a short-circuit current in the first electrical energy storage unit based on the at least two recorded electric currents, and detecting an internal short circuit when the magnitude of the short-circuit current exceeding a predefined short-circuit current threshold.

Method for detecting an internal short circuit in a first electrical energy storage unit of an electrical energy storage device

The invention relates to a current sensor comprising an electric conductor (), through which a first current (I) can flow parallel to a first direction (R) and which comprises three regions () immediately following on from each other in the first direction (R). A middle region () of the three regions () comprises a conductor cross-sectional area that is smaller than a conductor cross-sectional area of each of the two outer regions () of the three regions (). A voltage sensor of the current sensor is designed to measure a first voltage between the two terminals () thereof. The first voltage is the same as a voltage applied to a measuring region () at least partially coinciding with the middle region (). An evaluation unit of the current sensor is designed to determine an existing current value of the first current (I) in accordance with an existing voltage value of the first voltage and a pre-defined resistance value of a first resistance of the measuring region ().

Current sensor and battery comprising such a current sensor

Electrical energy storage system (), comprising at least two strings (STR, STR, STR) interconnected in parallel connection, wherein the strings each have at least two electrical energy storage units () interconnected in series connection, characterized in that at least one first electrically conductive cross-connection () between electrical energy storage units () at an identical first electrical potential in the strings (STR, STR, STR) interconnected in parallel connection is electrically conductively connected via at least one diode () to a means for detecting an electric current () and a controllable electrical energy source (), wherein the diode () is not incorporated into the first electrically conductive cross-connection ().

Electrical energy storage system comprising a cross-connection of a plurality of parallel energy storage strings that is electrically conductively connected to a current detection means via a diode, and method for detecting a conduction fault

A method for operating an electrical energy storage system, wherein the electrical energy storage system has a plurality of components which fulfill the same purpose, and the method comprises: acquiring first feature data sets that identify the components in each case unambiguously in the energy storage system; comparing the acquired first feature data sets with second feature data sets stored in a first memory; in the case of a deviation between the first feature data sets and the second feature data sets that is established by the comparison, classifying the deviation; storing a value in a second memory depending on the classification of the deviation; and upon a predefined condition being fulfilled by the stored value, at least partly limiting a functionality of the electrical energy storage system.

Method and electronic control unit for operating an electrical energy storage system

The invention relates to a method for measuring an electric current of a battery () with multiple battery modules (), having the step of measuring a temperature related to the battery module (). According to the method, the temperature of a connector is first determined for at least one battery module () using the measured temperature and a temperature model, and the electric resistance of the connector is determined using a resistance model and the temperature of the connector. The electric voltage which drops at the connector is then measured, and the electric current flowing through the connector is calculated from the voltage. The invention additionally relates to a corresponding device and to a battery comprising such a device.

Method and device for measuring the electric current of a battery with multiple battery modules

Electromechanical adapter having at least one controller, wherein the adapter comprises at least a first interface for communication with at least one monitoring unit at the battery, a second interface for communication with a monitoring unit that is superordinate to the monitoring unit at the battery, and a third interface for the connection of at least one sensor and/or actuator, wherein the controller converts signals between the first and second interfaces.

Electromechanical adapter for communicating between interfaces

A battery includes a plurality of battery cells configured to make available an electrical output voltage and a plurality of battery electronics which is coupled to the plurality of battery cells and includes a current measuring device configured to determine a present battery current, a detection device configured to determine further operating parameters of the plurality of battery cells, and a setting device configured to set an excess current threshold for the battery current based on an actuation variable. The setting device is configured to determine the actuation variable based on a present load bearing capacity of the plurality of battery cells.

Battery and method for safely operating the battery

The invention relates to a method for the secured digital transmission of current measurement values and to a battery () and a battery controller () which are suitable for carrying out the method. The method has the steps of detecting (SS) an amplitude of a battery current (I) in a battery () using a first and a second sensor (), generating (SS) a first and a second bit sequence, each of which describes the detected amplitude, generating a mirrored second bit sequence () by reversing (S) a sequence of the bits provided by the second bit sequence (), simultaneously transmitting (S) the first bit sequence via a first data bus () and the mirrored second bit sequence () via a second data bus () to a battery controller (), generating a second bit sequence () by reversing (S) a sequence of the bits provided by the mirrored second bit sequence () after the simultaneous transmission (S), and finally detecting (S) a possible error in the first bit sequence or the second bit sequence () by comparing the first bit sequence () with the second bit sequence (). Transmission faults are thus detected in particular in a transmission path between the sensors of the battery and the battery controller, said faults being caused by a common disturbance. Additionally, faults can also be detected which are caused by a disturbance that only affects one of the sensors or a part of the transmission path.

Battery, battery controller, and method for the secured digital transmission of current measurement values

The invention relates to a battery pack having a plurality of electrochemical battery cells, comprising a device for measuring a difference between two cell currents of two different battery cells, wherein a first battery cell has a first wound element, consisting of a first electrode layer and a second electrode layer, which causes a first magnetic field via a first of the cell currents, and a second battery cell has a second wound element, consisting of a third electrode layer and a fourth electrode layer, which causes a second magnetic field via a second of the cell currents, wherein the first and the second wound elements are arranged relative to each other such that the first magnetic field counteracts the second magnetic field in the case of the first and second cell current being rectified, wherein the battery pack additionally comprises a magnetic field sensor which is configured to measure a superimposed field consisting of the first magnetic field and the second magnetic field, and comprises an evaluating unit which is configured to determine a difference between the first and the second cell current from the measured superimposed field.

Battery pack having a plurality of electrochemical battery cells having a device for measuring a difference between two cell currents of two different battery cells

A battery cell monitoring unit for monitoring battery cells includes at least one reference input for a reference voltage and at least one measurement input for a measurement voltage. The battery cell monitoring unit is configured to compare the reference voltage with at least one expected reference voltage value and to compare the measurement voltage with an expected measurement voltage range.

Battery cell monitoring unit, method for fault detection and elimination therein, battery system and motor vehicle

A battery includes a battery housing and also two connections configured to electrically conductively connect the battery to a load. The battery further includes a battery string which is positioned in the battery housing, and connects the two connections to one another. At least one battery cell is connected in series and/or in parallel with the battery string. The battery has at least one thermal tripping element which is positioned within the battery housing, and which is configured to trip when a predetermined first temperature is present in a region of the thermal tripping element, and therefore is configured to indicate a presence of this predetermined first temperature in the region of the thermal tripping element.

Battery with a thermal tripping element

A device comprises a battery having a multiplicity of battery cells and a sensor system for the redundant determination of a battery current flowing through the poles of the battery. The sensor system comprises a current measuring device for detecting the battery current and providing a current measurement value. Furthermore, the device comprises a voltage measuring device for separately detecting a variation with time of the single-cell voltage of at least one battery cell and providing at least one variation with time of a voltage measurement value. Furthermore, the device comprises an evaluating unit which is configured for determining the battery current from the at least one variation with time of the voltage measurement value, providing a corresponding current value and comparing the current value with the current measurement value.

Device and method for the redundant determination of a battery current flowing through the poles of a battery

A battery has two or more individual cells that are connected in series and which, for contacting purposes, each has at least one contact electrode to the positive electrode (cathode) and at least one contact electrode to the negative electrode (anode). The two are made of metals that differ from each other. The contact electrodes to the anode and the cathode have passive corrosion protection at least in the respective contacting region of the contact electrodes.

Growing community of inventors

Stuttgart, Germany

Sven Bergmann