Abstract: A method and system for predicting the time required for low voltage expression of a secondary battery, including (a) obtaining a leakage current by inputting a voltage of a battery cell of the secondary battery, measuring a freezing resistance of a battery cell, and dividing an input voltage by a measured freezing resistance, (b) obtaining a discharge capacity difference by setting a reference value of a voltage drop for selecting a low voltage defect and obtaining a discharge capacity difference between the input voltage and a voltage dropped therefrom by the reference value, and (c) dividing the discharge capacity difference by the leakage current to thereby calculate a time required for low voltage expression.

Abstract: Methods and systems for selectively connecting a plurality of battery cells in a dual-mode battery pack in series and parallel configurations and/or for individual cell monitoring. A dual-mode battery pack may generally include a housing; a first set of battery cells connected in series; and a second set of battery cells connected in series. The battery pack may also include series connection contacts selectively connectable to the first set of battery cells and to the second set of battery cells and, when engaged, connecting the first set of battery cells and the second set of battery cells in a series configuration; and parallel connection contacts selectively connectable to the first set of battery cells and the second set of battery cells and, when engaged, connecting the first set of battery cells and the second set of battery cells in a parallel configuration.

Abstract: A control apparatus of a storage battery system which discharges power from of storage batteries, converts the power, and supplies the power to a load, and which receives supply of power from an outside, converts the power, and charges the storage batteries is provided. The control apparatus includes: a reading part that reads charge command power and discharge command power; a distribution part that determines distribution charge power and distribution discharge power; and a charge-and-discharge execution part that allows charge or discharge of the storage batteries. The distribution part sequentially determines the distribution charge power for each of the storage batteries in an ascending order of charging rates of the storage batteries. When the reading part reads the discharge command power, the distribution part sequentially determines the distribution discharge power for each of the storage batteries in a descending order of the charging rates of the storage batteries.

Abstract: Methods and apparatus for enhancing reserve power units are described. An example apparatus includes a power source to operate a process control component and a power conditioner to provide power during a disruption of power from the power source to prevent a false trigger of a shutdown function of the process control component.

Abstract: A method of charging the battery of the vehicle includes starting charging of the battery; starting operation of an air conditioner using power supplied from the battery; and reducing an operation amount of the air conditioner while charging the battery and operating the air conditioner, thereby shortening the time required for charging the battery.

Abstract: The invention relates to a redox flow battery system, comprising a controller and a battery inverter, which is suitable for charging and/or discharging a battery. The battery inverter comprises: a) a plurality of battery connections, to each of which at least one battery can be connected; b) a first measuring device, which is suitable for measuring the voltage at a battery connection and which is connected to the controller with regard to signaling; c) a second measuring device, which is suitable for measuring the current at a battery connection and which is connected to the controller with regard to signaling; d) a grid connection, which can be connected to an alternating-current supply grid; and e) a plurality of DC/DC converters, of which at least one has a first bridge circuit directly connected to a battery connection.

Abstract: A battery includes a battery cell assembly, a battery management system, and including a switching device, wherein the battery management system includes a monitoring device that monitors parameters relevant to correct operation and safety, and the monitoring device includes a control unit coupled to the switching device such that it can interrupt a flow of current between the battery cell assembly and the voltage source.

Abstract: A charging path switching circuit includes a first port, a second port, a path switch unit, and a conversion unit. The first port is connected to an external electronic device to obtain a first electrical signal. The second port is connected to an external power source to obtain a second electrical signal. The conversion unit is connected the path switch unit and converts the first electrical signal or the second electrical signal to a predetermined voltage. The path switch unit is connected to the first port and the second port. The path switch unit selects to connect to the first port or the second port, to obtain the first electrical signal or the second electrical signal according to the connection of the first and the second port. The path switch unit preferentially selects to obtain the second electrical signal from the second port.

Abstract: A battery, in which an electrolyte (103) is positioned between a first electrode material (102) and a second electrode material (104), the first electrode material (102) is positioned between the first electrode current collector (101) and the electrolyte (103), the second electrode material (104) is positioned between a second electrode current collector (105) and the electrolyte (103), the second electrode current collector (105) is positioned between the second electrode material (104) and a PCB substrate (107), and the PCB substrate (107) is positioned between the second electrode current collector (105) and a PCB surface layer (108). By using one of the electrode current collectors in the battery as one layer of a printed circuit board, limitations on the size of the battery can be reduced without increasing the size of the electronic device in which the battery is situated, thus increasing the battery capacity.

Abstract: An apparatus for controlling charging of an environment-friendly vehicle, a system including the same, and a method thereof; the apparatus comprises a controller including a processor communicatively connected to the controller and configured to form: a predicted state of charge (SOC) calculating module configured to calculate a predicted SOC predicted to be consumed when the vehicle travels until the vehicle reaches a destination; a current SOC calculating module configured to calculate a current SOC of the vehicle; a mode start control module configured to determine a first mode in which the vehicle travels through driving of an electric motor and a second mode in which the vehicle travels through driving of an electric motor even though the current SOC is not more than a reference SOC, by using the predicted SOC and the current SOC; and an SOC adjusting module configured to adjust a minimum SOC use area when the vehicle starts the second mode.

Abstract: In a method for balancing an energy storage system, a capacitance of capacitive storage modules of a series circuit of capacitive storage modules is determined. The capacitive storage modules are connected to a balancing device to allow control of a charge of each of the capacitive storage modules via a flow of current between the balancing device and the capacitive storage modules. For each of the capacitive storage modules a module charge is determined from a voltage of the capacitive storage module and a predefined balancing voltage. A reference charge is determined from the module charges of the capacitive storage modules, and a balancing charge is determined for each of the capacitive storage modules from the reference charge and the module charge of the capacitive storage module. The charge of the capacitive storage modules is controlled by exchanging the balancing charge between the capacitive storage module and the balancing device.

Abstract: Disclosed is a method, a circuit arrangement, and an electronic circuit. The method includes discharging a gate-source capacitance of a transistor device from a first voltage level to a second voltage level with a first resistor connected in parallel with the gate-source capacitance and measuring a first discharging time associated with the discharging, and discharging the gate-source capacitance from the first voltage level to the second voltage level with the first resistor and a second resistor connected in parallel with the gate-source capacitance and measuring a second discharging time associated with the discharging. The method further includes comparing a ratio between the first discharging time and the second discharging time with a predefined threshold, and detecting a fault based on the comparing.

Abstract: Methods for fast-charging battery packs having at least one lithium battery cell with an anode, a cathode, and a reference electrode (RE) comprise charging the battery in a first phase by maximizing charging current, subsequently charging the battery in a second phase by decreasing the charging current in response to an anode potential (AP) determined by a RE to maintain the AP at or above an AP threshold, and subsequently charging the battery in a third phase by decreasing the charging current in response to the cathode potential (CP) determined by the RE such that the CP is maximized without exceeding the cathode potential threshold. A controller can determine anode potential or cathode potential in real time using a cell potential signal and a cathode RE signal or an anode RE signal, respectively. The AP threshold is the AP above which substantially no lithium plating occurs.

Abstract: A method for outputting a charging current is provided. When a power amplifier is connected to a device, the power amplifier acquires recognition information from the device. The power amplifier determines the type of the device according to the foregoing recognition information, and selects, according to the type of the device, a current to output. The power amplifier outputs the selected current to the device, in which the current is used to charge the device.

Abstract: Secondary battery protection circuits for protecting a battery from charging and/or discharging faults are provided. A secondary battery protection circuit may include a first terminal and a second terminal, a transistor electrically connected between the first terminal and the second terminal, a fuse electrically coupled to the gate of the transistor, and a fuse control circuit configured to cause current sufficient to open the fuse to pass through the fuse in the event of a fault condition.

Abstract: An apparatus for estimating a state of a battery including a data receiver configured to receive module data associated with a battery module included in a battery pack from the battery module, and a processor configured to acquire cell data corresponding to a battery cell included in the battery module from the module data, and determine a module state of the battery module based on the cell data.

Abstract: A circuit for detecting charger connection through a universal serial bus (UBS) connector is disclosed. The circuit includes a comparator having a first input coupled to a fixed voltage reference and a second input coupled to D+ pin of the USB connector, a voltage controlled current source (VCCS) coupled having a first terminal coupled to a supply and a second terminal coupled to the D+ pin and a resistor coupled between the first terminal and the second terminal of the VCCS. The VCCS is configured to bring voltage at the D+ pin within a preselected voltage range at the D+ pin when the voltage at the D+ pin varies beyond the preselected voltage range.

Abstract: A technique for managing power usage in a local communication network. The network includes at least one device having at least one operation phase. A processing unit receives information related to at least one operation phase of the device after detecting an operation phase change. The information includes power used by the device during the phase and an estimated duration of the phase. The processing unit determines projected power usage within the local network for the duration of the operation of the device, the projected power usage taking the form of at least one power usage increment and an associated increment duration. For a power usage increment, the processing unit: determines an output current to be output by at least one battery in order to at least partially compensate the increment; and sends, to the battery, a command to discharge the output current determined for the duration of the increment.

Abstract: A mobile terminal, a power adapter, and an upgrade method are disclosed. The method includes: downloading software upgrade information of the power adapter by a mobile terminal, the software upgrade information being upgrade software of the power adapter; and transmitting the software upgrade information to a processor of the power adapter by the mobile terminal through a data line in a charging port during a process that the mobile terminal is connected to the power adapter through the charging port to facilitate the processor to upgrade the software of the power adapter according to the software upgrade information. The mobile terminal downloads the software upgrade information, and the most updated software upgrade information is transmitted to the power adapter during the process that the mobile terminal connects to the power adapter, the power adapter is upgraded to solve the problem that the power adapter is difficult to upgrade.

Abstract: A system for tracking the capacity of a battery in a portable electronic device is described. While the portable electronic device remains plugged in to a power adapter, the system estimates the capacity of the battery by performing the following operations. The system measures a first open-circuit voltage for the battery while the battery rests at a first state of charge. Next, the system causes the battery to transition to a second state of charge. While the battery transitions to the second state of charge, the system integrates a current through the battery to determine a net change in charge for the battery. Next, the system measures a second open-circuit voltage for the battery while the battery rests at the second state of charge. Finally, the system estimates a capacity for the battery based on the first open-circuit voltage, the second open-circuit voltage and the net change in charge. This capacity measurement is repeated and the multiple results are fit to a line.

Abstract: [Object] To accurately detect states of a variety of types of secondary batteries even in a low-current range.

Abstract: There is provided an overvoltage protection circuit including: a comparator configured to compare a DC voltage supplied to a first load by a power generator with a first value set based on an upper limit of an operating voltage of the first load; a storage element configured to be charged with a portion of a current generated by the power generator; and a switch configured to change a flow of the current so that: when the DC voltage is higher than the first value, the portion of the current is supplied to the storage element and a second load coupled to the storage element in parallel, and when the DC voltage is less than or equal to the first value, the storage element supplies the second load with power.

Abstract: The disclosure relates to a method for monitoring the state of a battery. In the process, the internal temperature of the battery during a charging process is determined in defined intervals at different time points, and an evaluation unit continuously determines a temperature gradient at least from the temperature values. At least one limit value for the temperature gradient is stored in the evaluation unit, and the evaluation unit generates a signal when the temperature gradient which is determined by the evaluation unit reaches this limit value. When this signal from the evaluation unit is present, the charging voltage of the battery is driven such that there is no battery current, while the internal temperature of the battery is further periodically detected, and the evaluation unit generates an alarm signal when the temperature has fallen after suppression of the battery current.

Abstract: According to one embodiment, a storage-battery evaluation device includes: a data generator and a deterioration evaluator. The data generator generates a plurality of data items including charge amounts and voltage values of an energy storage device based on current values and the voltage values measured from the energy storage device, the energy storage device being subjected to charge/discharge control in accordance with charge/discharge command values. The deterioration evaluator evaluates a deterioration state of the energy storage device based on a distribution of the voltage values included in the data items the charge amounts of which belong to a first charge-amount range when it is detected that a distribution of first charge/discharge command values satisfies a predetermined condition, the first charge/discharge command values being the charge/discharge command values at which the data items the charge amounts of which belong to the first charge-amount range is obtained.

Abstract: A power supply system is provided. The power supply system includes a first controller for controlling charge and discharge of a first electric storage apparatus and a second controller for controlling charge and discharge of a second electric storage apparatus. The first controller generates first scheduling data indicating transition of electric power to be charged and discharged from the first electric storage apparatus during a first prediction period. The second controller generates second scheduling data indicating transition of electric power to be charged and discharged from the second electric storage apparatus during a second prediction period containing the first prediction period. Generation of the first scheduling data is performed based on the second scheduling data previously generated by the second controller.

Abstract: A railroad system includes a first vehicle and a second vehicle. The first vehicle includes a drive-part, an inverter, an electric storage device, and a control part. The control part controls feasibility of charge or discharge of the electric storage device based on a detection value of any of a charge accumulation amount of the electric storage device, a distance between the first vehicle and the second vehicle, or a voltage value of a power line. When it is assumed that the detection value when charge or discharge of the electric storage device is switched from an allowable state to a prohibited state is a first set value, and the detection value when charge or discharge of the electric storage device is switched from a prohibited state to an allowable state is a second set value, the first set value and the second set value are different from each other.

Abstract: Disclosed are an apparatus and a method for sensing opening of a current interrupt device (CID) of a battery unit. An apparatus for sensing opening of a current interrupt device of a battery unit according to the present invention is configured to include: a setting unit setting a predetermined voltage section when discharge of one or more battery units starts; a measuring unit measuring a voltage section pass time which is the time when the one or more battery units pass through the predetermined voltage section for each battery unit; and a detecting unit detecting a battery unit in which the current interrupt device (CID) is opened among the one or more battery units and detecting the number of battery cells in which the CID is opened among one or more battery cells included in the battery unit in which the CID is opened based on the voltage section pass time for each battery unit.

Abstract: A battery comprises an anode, a cathode, a first reference electrode, and a second reference electrode. The battery also include an electrolyte between each of the anode, cathode, first reference electrode, and second reference electrode.

Abstract: A method for detecting a short circuit within an energy store. The method includeds registering a current which flows through the energy store, registering a first voltage which is made available by the energy store at a first time, registering a second voltage which is made available by the energy store at a second time following the first time, determining whether the energy store is in a state of charge, a discharge state or in an open-circuit state, executing a first detection step when the energy store is in an open-circuit state, a second detection step when the energy store is in a state of charge, and a third detection step when the energy store is in a discharged state, and determining whether a short circuit is present based on the first and second voltage.

Abstract: To provide a charging/discharging control circuit and a battery apparatus which control charging/discharging of secondary batteries connected in parallel and are high in safety while being low in cost. A charging/discharging control circuit and a battery apparatus are each configured to be provided with a voltage detection portion which detects a difference in voltage between secondary batteries connected in parallel or detects that backward currents are made to flow through charging/discharging control switches which are respectively connected to the parallel-connected secondary batteries and control charging/discharging thereof.

Abstract: A charge state calculation device includes a detection means for detecting the voltage and/or the current of a battery, a charge state calculation means for calculating the charge state of the battery, a full charge detection means for detecting the full charge of the battery, a correction value calculation means for calculating, when the full charge of the battery is detected, a correction value for correcting the charge state to the charge state of 100%, a correction means for correcting a charge state by the correction value, and a display means for displaying the charge state thus corrected by the correction means. The correction value calculation means updates the correction value only when the full charge of the battery is detected, and maintains the updated correction value until next time the full charge of the battery will be detected.

Abstract: A method of controlling charging of a battery connected to a wheel driving motor for a hybrid vehicle is disclosed. The method comprises detecting battery charging information when a battery is charged; learning a state of health (SOH) of the battery by using the battery charging information; calculating a battery charging current by using the learned SOH; and controlling charging of the battery using the battery charging current.

Abstract: Methods and systems for selectively connecting a plurality of battery cells in a dual-mode battery pack in series and parallel configurations and/or for individual cell monitoring. A dual-mode battery pack may generally include a housing; a first set of battery cells connected in series; and a second set of battery cells connected in series. The battery pack may also include series connection contacts selectively connectable to the first set of battery cells and to the second set of battery cells and, when engaged, connecting the first set of battery cells and the second set of battery cells in a series configuration; and parallel connection contacts selectively connectable to the first set of battery cells and the second set of battery cells and, when engaged, connecting the first set of battery cells and the second set of battery cells in a parallel configuration.

Abstract: The present disclosure discloses a system and method of adjusting an output parameter of a secondary battery. The system according to the present disclosure determines a voltage, a current, and a temperature of the secondary battery, determines a state of charge of the secondary battery using the current, determines a deration target current value calculated from a maximum value of a predefined resistance change rate, which corresponds to the state of charge and the temperature, and an output maintaining time, when the voltage of the secondary battery decreases to a preset threshold voltage or lower, and provides an output parameter including at least one of the deration target current value and a deration target output value determined therefrom to a control system of a load device supplied with power from the secondary battery.

Abstract: Desktop USB Charge device has a built-in or added-on decorative or-and functional unit. The decorative or-and function unit is one of (1) compartment product has medium and miniature-items within the medium including decorative, reflective, glitter, or-and heater to cause inner items moved, or (2) stationary organizer, or (3) moving, shaking, vibration, rotating, spin product, or (4) Physic-products, or (5) compartment assembly to put items within, or (6) music or smell device, or (7) magnetic reaction products. The desktop USB charger device has USB charger-unit not only supplied power to other external product but also has additional (a) USB can delivery digital-signal or digital-data to other computer or communication related products including external consumer electric device, or communication device, printer, scanner, hard-disc, storage device, camera, video camera.

Abstract: An information handling system includes an information handling subsystem, a power supply unit operably connected to the information handling subsystem, and a battery power subsystem operably connected to the information handling subsystem and having a controller. The controller configured to enter a learning mode of the battery power subsystem when the information handling subsystem is in a normal power state, enable a regulator output of a regulator of the battery power subsystem to provide power from a battery of the battery power subsystem at a learning mode current limit and at a learning mode voltage level to the information handling subsystem, provide, via the regulator output, power from the battery at a constant learning mode current level and at the learning mode voltage level to the information handling subsystem, and determine that the battery has been discharged to an acceptable discharge level.

Abstract: The present disclosure discloses a charging system, a charging method and a power adapter. The system includes a power adapter and a terminal. The power adapter includes a first rectifier unit, a switch unit, a transformer, a second rectifier unit, a sampling unit, a control unit and a first isolation unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current value and/or voltage value sampled by the sampling unit, such that a third voltage with a third pulsating waveform outputted by the second rectifier unit meets a charging requirement. The terminal includes a battery. When the terminal is coupled to the power adapter, the third voltage is applied to the battery.

Abstract: A power adapter, a terminal, and a method for processing an impedance anomaly in a charging loop are provided. The terminal includes a battery and a charging interface, and is configured to form a charging loop with a power adapter via the charging interface to charge the battery. The terminal further includes: a communication component, configured to receive voltage indication information from the power adapter when the power adapter charges the terminal, the voltage indication information indicating an output voltage of the power adapter; a detection component, configured to detect an input voltage of the power adapter; and an anomaly processing component, configured to determine whether an impedance of the charging loop is abnormal according to a difference between the input voltage and the output voltage, and to control the charging loop to enter into a protected state if the impedance of the charging loop is abnormal.

Abstract: A power supply and a power control method thereof are provided. The power supply is adapted to be coupled to a load. The power supply includes a battery, an amplifying circuit, and a control circuit. The amplifying circuit receives a load voltage from an output end of the power supply. The amplifying circuit receives a battery voltage from an output end of the battery. When the load is coupled to the output end of the power supply, the amplifying circuit provides a first output voltage according to a voltage difference between the load voltage and the battery voltage. The control circuit controls the battery according to the first output voltage in providing a second output voltage, such that the load is charged at the second output voltage.

Abstract: A method includes estimating an average concentration of ions in electrodes of a battery and estimating a state-of-charge (SOC) of the battery by Coulomb counting, correcting the ion concentration based on a difference in predicted and measured cell voltages, and correcting the Coulomb counting SOC based on a relation between SOC estimated by Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages.

Abstract: A battery system comprising a plurality of battery strings, a charge equalization circuit, a relay matrix, and a balance controller. The plurality of battery strings comprises at least three batteries connected in series, where the battery strings are connected in parallel. The charge equalization circuit is capable of equalizing the charge on any pair of series connected batteries in any one of the plurality of battery strings. The relay matrix is operatively connected between the charge equalization circuit and the plurality of battery strings. The balance controller operates the relay matrix based on at least one of a voltage and a current of any one of the batteries such that the charge equalization circuit is connected across any one of the pairs of series connected batteries in any one of the plurality of battery strings.

Abstract: In an apparatus, an OCV calculator measures a close circuit voltage (CCV) across an equivalent circuit of a storage battery, and calculates an open circuit voltage (OCV) across the storage battery based on the CCV, the equivalent circuit, and a current flowing through the storage battery. The equivalent circuit simulates an electrochemical behavior of the storage battery. The equivalent circuit includes the OCV as a power supply voltage and a predetermined internal impedance connected in series to the power supply voltage. The internal impedance includes a capacitance. A calculator calculates an SOC of the storage battery as a function of the OCV. A determiner determines whether the capacitance is saturated as a function of an electrical parameter associated with a charge stored in the capacitance. A diagnosing unit diagnoses whether the SOC of the storage battery is appropriate according to whether the capacitance is saturated.

Abstract: An electronic connecting/disconnecting device for a high voltage unit for storing electrical energy designed to be charged and discharged asymmetrically, in particular a battery arranged as part of an electrical circuit is provided. The device includes a charging switch and a discharge switch arranged in parallel and dimensioned asymmetrically for charging and discharging the unit for storing electrical energy, the charging switch being adapted to block, in a first direction of passage, an electric current flowing therethrough, this first direction of passage being opposite to a second direction of passage in which the discharge switch is adapted to block an electric current passing therethrough, the device being able to be activated when a physical magnitude of an electrical current flowing through the circuit is greater than a predetermined threshold.

Abstract: Embodiments include methods and products for evaluating microbatteries. The microbattery includes a cathode layer, an anode layer physically separated from the cathode layer, and an electrolyte layer in contact with the anode and the cathode. The microbattery also includes at least one auxiliary electrode in physical contact with the electrolyte layer, the auxiliary electrode containing at least one metal coating and at least one non-conductive film, wherein the at least one metal coating is physically separated from the cathode and the anode.

Abstract: A method of controlling a combined plant to provide frequency support to a power grid operating at a variable grid frequency, wherein the combined plant includes at least one generator and an energy store, and the combined plant is adapted to supply power to the power grid, the method including the steps of charging the energy store at less than its rated power when frequency support is not needed. When frequency support is needed the combined plant is controlled to increase or decrease the overall power that it supplies to the power grid to provide frequency support. The control of the combined plant can be designed to maximize frequency support revenues.

Abstract: A communication interface, and method thereof, allows a single communication device to accept data from multiple different types of sensors for transmission to a communication network. The communication interface is capable of inputting data from many types of sensors and outputting the data directly to the communication device. The communication interface translates or otherwise converts a variety of sensor data into a common message format that is appropriate and acceptable to the communication device. Such a communication interface allows many different types of sensing applications, particularly in distant and remote locations, to use a common communication device to communicate with a central server.

Abstract: The effect on battery capacity of an application can be tested on computing devices. A server controller can instruct the computing devices to install applications and simulate user interactions with the applications. The controller can store indications of battery usage during the time that the simulated user interactions with the application are performed on the computing device. When battery capacity of the computing device is below a lower threshold, the controller can connect the computing device to a power supply. When the battery capacity of the computing device is again above an upper threshold, the controller can disconnect the computing device from the power supply and being testing a new application on the computing device.

Abstract: A programmable battery protection system. Implementations may include: a battery, only two field effect transistors (FETs), and a battery protection integrated circuit (IC). The battery protection IC may include an array of fuses, first plurality of latches, second plurality of latches, and a comparator. The array of fuses, first plurality of latches, and second plurality of latches may be coupled with a fuse refresh circuit coupled with an analog trigger circuit and a logic trigger circuit. The fuse refresh circuit may be configured to refresh the states of the latches using states of the array of fuses in response to receiving an operating trigger signal generated by the analog trigger circuit or a logic trigger signal generated by the logic trigger circuit. The first plurality of latches may be used to generate a threshold voltage that is provided to the comparator.

Abstract: A number of variations include a method, which may include using at least a segment of voltage-based Battery State Estimation data, and using real-time linear regression, which may be a method of estimating future behavior of a system based on current and previous data points, to provide a robust and fast-adapting impedance response approximator. Linear regression may be performed by forming an RC circuit which is “equivalent” to electrochemical impedance spectroscopy data and processing the runtime values of that RC circuit using any number of known real-time linear regression algorithms including, but not limited, to a weighted recursive least squares (WRLS), Kalman filter or other means.

Abstract: A method is described for ascertaining an internal resistance of an electrical energy accumulator. For this purpose, an analog voltage signal and an analog current signal are subjected to an analog to digital conversion and subsequently to band-pass filtering in order to obtain filtered voltage values and filtered current values. These are then checked with regard to different calculation prerequisites, whereupon a zero-phase resistance is calculated. Then, the calculated zero-phase resistance is supplied as internal resistance.