Abstract: A method and a system for estimating degradation of a battery for an electric vehicle are provided. The method includes determining a current battery resistance increase rate by measuring an increase in resistance of the battery during charging of the battery, determining an initial battery resistance increase rate on the basis of a predetermined initial battery resistance increase rate map for indicating the battery resistance increase rate of the battery in a begin of life (BOL) state, and calculating current degradation of the battery on the basis of the current battery resistance increase rate and the initial battery resistance increase rate.

Abstract: Provided are an apparatus, method and battery pack for determining a degradation degree of a battery. The apparatus generates first sensing information indicating a voltage and a current of the battery while the battery is charged with a first constant current. The apparatus generates second sensing information indicating a voltage and a current of the battery for a second period during which the battery is discharged with a second constant current. The apparatus determines a first differential capacity curve based on the first sensing information and a second differential capacity curve based on the second sensing information. The apparatus is configured to determine the degradation degree of the battery based on a voltage value of a first charge feature point of the first differential capacity curve and a voltage value of a first discharge feature point of the second differential capacity curve.

Abstract: The present invention relates to a mobile system for continuous, automatic, online monitoring of water quality and particle sampling in a drinking water distribution network, comprising: a mobile unit provided with means for supplying, from at least a selected one of the plurality of points in the drinking water distribution network, a corresponding, selected influent fluid sample stream; means for discharging a corresponding, selected effluent fluid sample stream; for each selected influent fluid sample stream, a respectively associated continuous monitor module.

Abstract: An estimation apparatus that estimates a degradation amount of an energy storage device includes: a storage unit; and an arithmetic processing unit. The energy storage device has a characteristic of including a first degradation area in which a temporal transition of a degradation amount shows a first transition and a second degradation area in which the temporal transition of the degradation amount shows a second transition. The storage unit holds first arithmetic data for calculating the degradation amount in the first degradation area, and second arithmetic data for calculating the degradation amount in the second degradation area. The arithmetic processing unit executes determination processing of determining a degradation area of the energy storage device, and estimation processing of selecting arithmetic data corresponding to the degradation area from the storage unit to estimate the degradation amount of the energy storage device.

Abstract: A battery resistance diagnosis device includes a current supply unit configured to supply a preset fixed current to a battery cell, a voltage measurement unit configured to measure an open circuit voltage of the battery cell while the fixed current is supplied, an external resistance calculation unit configured to calculate an external resistance value of the battery based on the fixed current and the open circuit voltage of the battery cell, and an abnormality diagnosis unit configured to diagnose a battery abnormality due to a voltage drop by comparing the calculated external resistance value with a preset external resistance value.

Abstract: An object of the present invention is to provide a battery state estimation device capable of accurately estimating a deterioration state of an entire battery system in consideration of an SOH distribution of battery cells. The battery state estimation device according to the present invention estimates an SOH of a battery cell by using a correspondence between a time derivative of an output voltage during a pause period of the battery cell and a battery temperature, and estimates a deterioration state of an entire battery system by using the SOHs of a plurality of battery cells (see FIG. 1).

Abstract: A battery current measuring device includes a switching element configured to control charging and discharging of a battery, an A/D converter configured to convert a voltage value across the switching element into a digital value, a temperature compensation unit having a diode structure capable of compensating for a resistance change according to a change of temperature of the switching element, and a current calculation unit configured to calculate a current flowing through the switching element based on the digital value of the voltage value, and the A/D converter converts the voltage value of the switching element into the digital value using a reference voltage inputted from the temperature compensation unit.

Abstract: A battery management apparatus includes a measuring unit configured to measure a voltage of each of a plurality of battery cells, a converter connected to corresponding battery cells among the plurality of battery cells and configured to form a charge and discharge path between the connected battery cells according to an operation state of a switch included therein, and a control unit configured to receive a voltage value of each of the plurality of battery cells from the measuring unit, control the operation state of the switch included in the converter, calculate a voltage change rate of a charging cell charged by the converter according to the control of the operation state of the switch, and determine whether the charging cell is degraded based on the calculated voltage change rate.

Abstract: The present invention concerns a method for estimating the state of charge (SoC) of an electrochemical element.

Abstract: A battery management system and method for performing a battery health parameter observation, in particular, cell impedance observation, with two redundant, independent and dissimilar lanes. Specifically, a cell impedance observation in a first one of the lanes is based on Electrochemical Impedance Spectroscopy, EIS. The other lane employs a different algorithm than EIS. In embodiments, a battery state observation is further performed independently by the two lanes, wherein again the first lane employs EIS and the other lane a different (dissimilar) algorithm. On the basis of state and health observation, state (state of function) of the battery system can be predicted to determine a range of flight in accordance with a predetermined flight profile.

Abstract: The invention relates to a device for testing, in particular high-frequency testing, a test item, for example an electrical machine or a converter, comprising: a simulation unit for simulating an electrical energy accumulator using a simulation model; and an electrical connection line, via which the test item can be connected to the simulation unit; wherein the device comprises compensation impedance for compensating for an impedance in accordance with a line inductance of the connection line.

Abstract: Systems, methods, and devices are provided for estimating a state-of-health (SOH) in an energy storage system, where the estimate accounts for both power fade and capacity fade. The SOH estimation system comprises a SOH estimation module configured to receive, and to determine the estimate of the SOH based on: a nominal capacity input; a voltage input; a current input; a nominal open circuit voltage curve; an operational resistance model; a nominal resistance model; an operational dynamic model; and a rated discharge current. The SOH estimation module may further comprise a SOH aggregation module configured to receive a power rating estimate, PRn, and a normalized capacity estimate, NCn, and may be configured to determine the estimate of the SOH based on the power rating estimate, PRn, and the normalized capacity estimate, NCn.

Abstract: A method for estimating state of health (SOH) of an electric battery includes starting a charging of an electric battery with a charge current, measuring a voltage of the electric battery during the charging, determining a first point in time at which a minimum slope of the voltage curve during the charging occurs, determining a second point in time when the measured voltage of the electric battery equals a maximum charging voltage, determining a SOH-interval between the first point in time and the second point in time, estimating the state of health for the electric battery based on the SOH-interval. The advantage of the method is that an estimated value for the state of health of an electric battery is obtained in an easy and reliable way.

Abstract: The present disclosure relates to a battery management system and method for diagnosing abnormal deterioration of a battery cell, and provides the battery management system including an SOC calculation unit for calculating a state of charge (SOC) of a plurality of battery cells, a change amount calculation unit for calculating, for each of the plurality of battery cells, an SOC change amount that is a change amount of the calculated SOC during a preset period and an SOC change amount average that is an average of the SOC change amount of all the plurality of battery cells, and an abnormal deterioration diagnosis unit for diagnosing an abnormal deterioration of each of the plurality of battery cells using the SOC change amount and the SOC change amount average thereby accurately diagnosing abnormal deterioration of battery cells.

Abstract: A system for obtaining state information of a battery may be disclosed. The system includes: at least one first harness cable for obtaining, on the basis of a CAN protocol, data indicating state information of the battery from a battery management system of the battery; an analyzer for providing a driving signal for driving the battery management system; and a first junction box for transmitting the data input through the first harness cable to the analyzer, wherein the analyzer may be configured to output the data received from the first junction box to the outside.

Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell, and a state of charge (SOC) of the battery cell is estimated based on the estimated OCV, SOC-OCV characteristics on a charge side of the battery cell, and SOC-OCV characteristics on a discharge side of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials.

Abstract: An electrochemical storage diagnostic system is configured to perform an electrical test to measure energy storage device parameters. The diagnostic system includes a charge management controller, electrically coupled to a power multiplexer, a power converter circuit, and an isolated converter circuit. The charge management controller is programmed with instructions to identify a device under test, selected from at least one member of the plurality of energy storage devices to perform an electrical test. Then, adjust a charge in the secondary energy storage device to a target voltage through the power multiplexer by transferring energy between the secondary energy storage device and a support device, selected from at least one member of the plurality energy storage devices. After that, transfer electrical power through the power multiplexer and power converter circuit to the device under test in order to perform the electrical test. Finally, complete the electrical test.

Abstract: A process for determining an impedance of a battery cell may comprise delivering an excitation current to the battery cell; performing, via an analog-to-digital converter (ADC), one or more first measurements associated with the battery cell in the presence of the excitation current, wherein the one or more first measurements comprise one or more current measurements; performing, via the ADC, one or more second measurements associated with the battery cell in the presence of the excitation current, wherein the one or more second measurements comprise one or more voltage measurements; and determining the impedance of the battery cell based on the one or more first measurements and the one or more second measurements.

Abstract: Briefly, embodiments of a system, method, and article for estimating a true state of charge (SOC) measurement for a battery based, at least in part, on a measurement of a rate of change of current supplied to the battery at a particular constant voltage value based, in part, on a current charging profile for the battery indicating a mapping between measurements of rates of change of current supplied to the battery at the particular constant voltage value and SOC measurements for the battery. A true SOC measurement for the battery may be determined based, at least in part, on the mapping. The first SOC measurement may be corrected to match the true SOC measurement at a particular point in time.

Abstract: A management device includes an information acquirer configured to acquire battery information on a usage state of a secondary battery mounted in a vehicle and information on a user from the vehicle, a first feature deriver configured to derive a first feature indicating a state of the secondary battery based on a result obtained by applying the battery information to a battery state detection model that identifies the state of the secondary battery, a second feature deriver configured to derive a second feature indicating characteristics of the user based on the information on the user, and a selector configured to select a battery suitable for the user based on a result obtained by inputting the first feature and the second feature to a matching model that outputs a result showing compatibility between the user and a battery based on the first feature and the second feature.