Abstract: The invention discloses a method for precisely estimating the remaining capacity of a rechargeable battery in a practical system. To evaluate the remaining capacity of a battery through a calibrated current which is calculated from a predictable capacity close to the end of discharge or to the end of full charge, so that the remaining capacity of battery will approach end points smoothly. A system can thus detect battery status and take necessary actions safely. Battery aging problem is considered while calculating the remaining capacity and the full charge capacity (FCC) of battery is also updated according to the total cumulated charges during a charge or discharge stage.

Abstract: Methods, apparatus, and computer program products are disclosed for determining a reported state of charge (“SOC”) of a battery system, the methods, apparatus, and computer program products including determining the reported SOC according to a first determining method when a previous SOC is greater than a first SOC threshold percentage and less than or equal to 100%; determining the reported SOC according to a second determining method when the previous SOC is greater than a second threshold percentage and less than or equal to the first SOC threshold percentage; and determining the reported SOC according to a third determining method when the previous SOC is greater than or equal to 0% and less than or equal to the second SOC threshold percentage.

Abstract: A battery system has: a voltage detection apparatus including a voltage detection portion which includes an AD converter which converts an analog voltage signal having a measurement target analog voltage into a digital voltage signal to output the digital voltage signal, a voltage level discrimination portion which is connected to a voltage detection line across which the analog voltage signal is delivered, and which discriminates the voltage level of the measurement target analog voltage to output a discrimination result, and a fault detection portion which detects, based on the output of the AD converter and the output of the voltage level discrimination portion, a fault in the voltage detection portion in a state in which the voltage value of the digital voltage signal is within a predetermined voltage range; a battery as a voltage source of the measurement target analog voltage; and a control portion which, when the fault detection portion detects the fault, limits the discharging of the battery, or limit

Abstract: A current integrating circuit device, including a current sensor to detect a current flowing through a current path, a first-order lag filter to filter an output of the current sensor, an A/D converter to convert an analog signal filtered by the first-order lag filter into a digital signal, and a proportional integrator to proportionally integrate the digital signal outputted from the A/D converter.

Abstract: A method for determining the state of health (SOH) of a battery is provided in which cell impedance is determined continuously, and including determining one or more confidence coefficients that depend on one or several variables selected from cell current, temperature or state of charge or their derivatives or integrals with respect to time, and continuously determining the state of health of the battery at a given point in time, using the state of health of the battery at a preceding point in time corrected as a function of cell impedance determined at the given point in time and weighted by the confidence coefficient or coefficients. The method provides a reliable way of determining the state of health of the battery with greater stability and robustness than existing methods.

Abstract: A method for determining an end of life of a battery includes determining a discharge capacity of the battery at a given moment in time, determining a discharge capacity at a functional endpoint of the battery, and determining a fuel remaining in the battery at the given moment in time as a function of both the discharge capacity at the given moment in time and the discharge capacity of the battery at the functional endpoint of the battery. The determined fuel remaining is indicative of an end of life of the battery.

Abstract: The method of estimation of the state of charge of a lead acid battery comprises measuring the open circuit voltage difference between an integrated liquid junction reference electrode and a negative battery terminal during at least one cut-off period. It further comprises determination of the sign of the current though the battery prior to cut-off and estimation of the state of charge on the basis of the open circuit voltage difference and, according to the sign of the current, respectively of a charge or a discharge calibration curve, previously determined during a calibration procedure. The cut-off period has preferably a duration of at least 5 minutes.

Abstract: A device is used for measuring an output voltage of a battery. The device includes a detecting circuit, an encoding circuit, a control circuit, and a processing circuit. The detecting circuit is configured for detecting the output voltage of the battery and generating a first signal, a second signal, and a third signal accordingly. The encoding circuit is configured for generating a first code and a second code according to the first signal and the second signal. The control unit is configured for modifying the second code when the third signal indicates that the output voltage is lower than a predetermined value. The processing unit is configured for generating and outputting display control signals according to the first and second codes. The display control signals are used to control a display panel to display information of the output voltage of the battery.

Abstract: The method of estimation of the state of charge of a lead acid battery comprises measuring the open circuit voltage difference between an integrated liquid junction reference electrode and a negative battery terminal during at least one cut-off period. It further comprises determination of the sign of the current though the battery prior to cut-off and estimation of the state of charge on the basis of the open circuit voltage difference and, according to the sign of the current, respectively of a charge or a discharge calibration curve, previously determined during a calibration procedure. The cut-off period has preferably a duration of at least 5 minutes.

Abstract: An apparatus is provided to control a power voltage on a power-supplying line extending from a generator and connecting to a battery and eclectic loads. The apparatus is mounted on a vehicle and comprises a detecting device, a calculator, and a controller. The detecting device detects pairs of voltage and current of the battery. The calculator calculating a control current on the basis of the detected pairs of voltage and current and a target voltage for the power voltage. The pairs of voltage and current are used to calculate an internal resistance and/or a regression line of the battery. The controller controlling a charge and discharge current of the battery on the basis of the control current so that the power voltage is controlled to the target voltage.

Abstract: The invention relates to a method and arrangement for determining a power supply state variable, particularly of the maintenance state of a battery or rechargeable battery, in an active medical implant, wherein the power supply is subjected to a predetermined load, and the output voltage thereof is detected multiple times during at least one time segment of the load phase, and the measurement values are subjected to a comparison to a respective comparison value, or the chronological curve of the voltage obtained from the measurement values is subjected to a comparison to at least one comparison curve, wherein the comparison result is considered characteristic for the state variable.

Abstract: There is provided a measuring system capable of rendering a power source voltage of an internal circuit higher than a drivable voltage of the internal circuit by removing or reducing a chloride film with greater certainty, thereby enabling operation, and initial activation of the internal circuit to be normally executed, or preventing the internal circuit from running away. The measuring system comprises a thionyl chloride based primary cell, a cell voltage measurement unit, and an internal circuit provided with state-transition controller wherein in the case of transition of the internal circuit to a state thereof, having a discharge current larger than the discharge current in the present state thereof, the transition is made according to results of comparison of a voltage measured by the cell voltage measurement unit with a threshold on the basis of a discharge current in a state before, or after the transition of the internal circuit.

Abstract: In a cell voltage detecting system detecting cell voltages of a fuel cell connected in series, a voltage detector detects cell voltages. An auxiliary power supply generates a voltage equal to or greater than a minimum voltage for driving the voltage detector at positive and negative terminals thereof. First and second diodes are connected to a positive drive terminal of the voltage detector to supply the power to the drive terminal of the voltage detector from a high voltage side between the fuel cell or the auxiliary power supply. A negative terminal of the fuel cell, the negative drive terminal, and the negative terminal of the auxiliary power supply are connected to have a same potential. A method of maintaining a drive voltage for the voltage detector is also disclosed in which the drive voltage for the voltage detector is supplied from the high voltage side.

Abstract: A substrate includes a plurality of voltage-detection components, each of which includes (a) an upper connecting terminal that protrudes from one of a pair of first sides opposite each other of a body of a voltage-detection component and is connected to an adjacent voltage-detection component of an adjacent higher-ordered battery block of the battery pack, and (b) a lower connecting terminal that protrudes from the other of the pair of the first sides of the body and is connected to an adjacent voltage-detection component of an adjacent lower-ordered battery block of the battery pack. The plurality of voltage-detection components are aligned on the substrate in a direction substantially orthogonal to the pair of the first sides of the body of the component.

Abstract: A system for the monitoring of the state of a battery used in a vehicle and to which electrical elements comprising at least one electrical consumer and/or at least one electrical generator are connected comprises means for the detection of the battery voltage, means for the extraction of voltage frequency components from the detected battery voltage at different frequencies, means for the detection of the current flowing out of or into the battery, means for the extraction of current frequency components from the detected battery current at the same frequencies at which the voltage frequency components were extracted, means for the determination of internal impedances of the battery from the voltage frequency components and current frequency components extracted at a respective frequency, means for the storage of predetermined relationships between the internal impedance and the battery state for each of the respective frequencies and means for the determination of the battery state from the determined inter

Abstract: A battery pack including at least one battery cell, a switch, and battery state monitoring circuitry. The battery state monitoring circuitry may be configured to control an ON resistance of the switch to a first ON resistance when the switch is ON and the battery pack is in a stand-by-state and to control the ON resistance to a second ON resistance when the switch is ON and said battery pack is not in said stand-by-state, the first ON resistance greater than the second ON resistance. A cordless electrical device and method consistent with embodiments are also provided.

Abstract: The present invention relates to a method and an apparatus for estimating discharge and charge power of battery applications, including battery packs used in Hybrid Electric Vehicles (HEV) and Electric Vehicles (EV). One charge/discharge power estimating method incorporates voltage, state-of-charge (SOC), power, and current design constraints and works for a user-specified prediction time horizon ?t. At least two cell models are used in calculating maximum charge/discharge power based on voltage limits. The first is a simple cell model that uses a Taylor-series expansion to linearize the equation involved. The second is a more complex and accurate model that models cell dynamics in discrete-time state-space form. The cell model can incorporate a inputs such as temperature, resistance, capacity, etc. One advantage of using model-based approach is that the same model may be used in both Kalman-filtering to produce the SOC and the estimation of maximum charge/discharge current based on voltage limits.

Abstract: A method, device and computer program product for determining the state of charge of at least one battery as well as to a power compensator for an electric power transmission line including such a device. The device includes an internal states prediction unit and a state of charge determining unit. The internal states prediction unit makes an internal states prediction of a battery based on a model for the battery, where each internal state is related to the charge distribution in the battery, adjusts the internal states prediction with measured properties of the battery and applies the adjusted internal states prediction in the making of following internal state predictions. The state of charge determining unit provides the estimated state of charge (SOC) as a function of the predicted internal states. The invention allows the provision of improved state of charge estimates.

Abstract: A battery monitoring unit and sensors are supplied with a common operating supply voltage to operate. Detection values from sensors are sent to a control circuit by the battery monitoring unit. The control circuit monitors the operating supply voltage using a voltage sensor and additionally determines whether or not the detection values from the sensors before the relay connection falls within a normal range to more accurately detect a power supply reduction abnormality of the battery monitoring unit. Therefore, abnormalities can be detected accurately when the sensor and the battery monitoring unit provided for the secondary battery cannot operate normally due to a reduced operating supply voltage.

Abstract: A battery management system with synchronized data sampling for a battery pack including multiple battery cells is disclosed. The battery management system includes a plurality of local monitors coupled to a plurality of battery cells and operable for sampling status information for the battery cells. The battery management system further includes a central controller coupled to the local monitors and operable for broadcasting a sample command to the local monitor synchronously, wherein the local monitors start to sample the status information for the battery cells in response to the sample command.

Abstract: 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.

Abstract: Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown voltage of the constant-voltage device is lower than the explosion or ignition voltage of the secondary battery, so the discharge operation may occur before the secondary battery is exploded or ignited even if the voltage of the secondary battery rises above the overcharge voltage, thereby protecting the secondary battery from explosion or ignition. The leakage current value of the constant-voltage device is less than 0.05% of the capacity value of the secondary battery under the maximum charge voltage of the secondary battery, or the breakdown voltage of the constant-voltage device is higher than the maximum charge voltage of the secondary battery. Thus, the constant-voltage device rarely generates the leakage current even if the secondary battery has been charged with the maximum charge voltage.

Abstract: The present invention relates to charging of rechargeable batteries built into electronic devices and is configured to constrain heat generation during the charging. A charging IC used for charging a rechargeable battery built into an electronic device is disclosed that comprises a power source unit which can be fed with power from an external power source with a drooping characteristic to pick up a constant current; and a control unit which applies a first constant current from the external power source to the rechargeable battery through a circuit element installed on a charging path of the rechargeable battery, the control unit applying a second constant current smaller than the first constant current from the power source unit to the rechargeable battery after the rechargeable battery is charged with the first constant current to a predetermined voltage.

Abstract: The present invention relates to a state of charge (SOC) compensation method for a vehicle using electrical energy, and a battery management system using the SOC compensation method. To determine the SOC of the battery, charge and discharge current of the battery is used to calculate a first SOC of the battery and a first corresponding voltage, a rheobasic voltage is calculated, an integration error corresponding to a difference between the first voltage and the rheobasic voltage is calculated, a SOC compensation factor is added to the first SOC when the integration error is greater than a first threshold value, and a SOC compensation factor is subtracted from the first SOC when the integration error is less than a second threshold value.

Abstract: A battery module system includes a battery module and a control member. The battery module comprises battery units are connected in series. Each of the battery units comprises a unit cell having a voltage variation rate A (mV/% SOC) at a full charge voltage VH1 (V) is larger than 20 (mV/% SOC), which is a value obtained when the unit cell is charged at a current of 1 C at 25° C. The control member controls current to a current I1 until a maximum value Vmax (V) among the voltage of each unit cell reaches the full charge voltage VH1 (V) and then controls a voltage of the battery module to a voltage V2 (V) given by the following equation (1): V2=VH2×n??(1).

Abstract: A method is provided for determining a residual charge on a battery (12), comprising applying a discharge pulse to the battery (12) and measuring a first voltage on the battery (12) at a first time (t1). Additional voltages on the battery are measured at additional times (t2, t3) subsequent to the first time (t1). Delta voltages (?V1, ?V2) are determined by subtracting each of the additional voltages from the first voltage and delta times (?t1, ?t2) are determined by subtracting the first time from each of the additional times. Regression equation coefficients (?, ?) are determined from regression analysis of the delta voltages and delta times, and are applied to a database for determining the residual charge.

Abstract: Battery charge indication methods, battery state of charge monitoring devices, rechargeable batteries, and articles of manufacture are described. According to one aspect, a battery charge indication method includes first determining a state of charge of a battery at a first moment in time using a first method, second determining a state of charge of the battery at a second moment in time using a second method different than the first method, and providing information regarding the state of charge of the battery at the first and second moments in time using information of the first and second determinings.

Abstract: A method and apparatus is provided for rapidly and safely estimating the high-rate load test voltage of a storage battery utilizing open-circuit voltage, temperature and a dynamic parameter such as conductance or resistance. An output indicative of the condition of the battery is provided as a function of the estimated load test voltage of the battery compared to industry standards without the necessity to charge the battery or discharge the battery with high-rate loads using bulky load testing equipment.

Abstract: A polymer electrolyte fuel cell of the present invention includes: plate-shaped cells (10) each having a pair of plate-shaped separators (6a) and (6b) and a membrane-electrode assembly (5) disposed between the separators (6a) and (6b); a cell stack (50) configured by stacking and fastening the cells (10); and a covering member (60) covering a peripheral surface of the cell stack (50), and voltage measuring terminal insertion holes (61) used to measure the voltages of the cells (10) are formed on the covering member (60) so as to be located at positions corresponding to the separators (6a) and (6b) of the cells (10).

Abstract: An electrical device is powered by a battery. The device includes transition phase determining circuitry operatively connected to the battery to determine that the battery has entered a transition phase based on the occurrence of a change in direction of current flowing through the battery. Battery capacity determining circuitry is operatively connected to the transition phase determining circuitry and configured to determine, in response the transition phase determining circuitry determining that the battery is in the transition phase, a capacity of the battery based on a transition phase battery capacity model of capacity-vs.-voltage. The transition phase determining circuitry is further configured to determine an end of the transition phase based on the transition phase battery capacity model and a non-transition battery capacity model of capacity-vs.-voltage yielding the same capacity value for a given measured voltage of the battery.

Abstract: A system for and method of estimating the state-of-age of a secondary cell utilizing an adaptive group filter algorithm, includes battery current, voltage, and temperature sensors, a communication device, and a controller communicatively coupled to the sensors and device, configured to filter data by analyzing only sample data points from instantaneous charge or discharge events, selecting only a sample of n instantaneous points for further regression, including n/2 charge event points and n/2 discharge event points, and separately averaging the charge and discharge event points, and further configured to determine the state-of-age by determining a resistance slope based on the rate of current and voltage change between the averages of the points, and matching the slope to a calibrated scalar or relational database.

Abstract: A battery tester that is capable of calculating its own reference values is provided. The battery tester includes test circuitry that is configured to obtain dynamic parameter values for batteries, and to compute at least one reference value based on the dynamic parameter values.

Abstract: Residual charge in a battery is measured based on a discharge voltage from the battery. A device for measuring the residual charge in the battery includes a fluctuation width amplifier configured to amplify a fluctuation width of a discharge voltage from the battery in excess of a threshold voltage. The device includes a display module configured to display the discharge voltage amplified by the fluctuation width amplifier. The discharge voltage amplified by the fluctuation width amplifier corresponds to the residual charge in the battery. The residual charge in the battery may be determined based on the discharge voltage and the application load data due to an operative application program.

Abstract: A method and system for determining standby time for a mobile station uses a battery simulator, a base station emulator, a computer to control the test equipment and MSUT for testing a mobile station. The computer includes a module for determining a radio off battery voltage, a module for deriving a battery capacity in dependence upon the radio off battery voltage, a module for measuring battery capacity usage in a predetermined time while the mobile station is in standby mode and a module for determining a standby time for the mobile station in dependence upon the battery capacity and the battery capacity usage, where the predetermined time is less than the standby time.

Abstract: A method for diagnosing a lead-acid battery of an automotive vehicle includes an experimentation phase in which parameterization of the state of health (SOH) of a lead-acid battery for different values of the state of charge (SOC) of the battery is conducted, and a diagnosis phase in which the battery temperature during the start-up phase of the vehicle is measured and, after the first discharge and over a given range of current variation, the corresponding voltage (U) and current (I) is measured, to deduce therefrom after processing, a value of parameter (?) of the battery. The state of charge (SOC) of the battery is then determined, and the value representing the state of health is determined, so as to establish a diagnosis of the battery.

Abstract: A diffusion estimation unit follows a diffusion equation in an active material that is represented by a polar coordinate to estimate a distribution in concentration of lithium in the active material. An open circuit voltage estimation unit obtains an open circuit voltage in accordance with a local SOC(?) based on a concentration of lithium obtained at an interface of the active material as estimated by the diffusion estimation unit. A current estimation unit uses a battery's voltage measured by a voltage sensor, the estimated open circuit voltage, and a parameter value that is set for the battery by a battery parameter value setting unit, and follows a voltage-current relationship model expression simplified from an electrochemical reaction expression to estimate the battery's current density.

Abstract: Disclosed is a cell balancing apparatus and method using a voltage variation pattern of a battery cell, which measures voltage of each cell, estimates OCV or SOC of each cell using a voltage variation pattern of each cell including a present voltage and a past voltage, and eliminates a deviation in OCV or SOC between the cells through comparison of the estimated OCV or SOC of each cell. In estimating the OCV of each cell, an output voltage error due to IR drop is corrected. Thus, SOC of each cell may be accurately estimated. And, an accurate estimation of SOC may render substantial elimination for a SOC deviation of each cell. Furthermore, SOC estimating using an output voltage leads to an active cell balancing even during charge and discharge of battery, thereby minimizing an SOC deviation of each cell.

Abstract: A generator controller, in its various embodiments, displays genset fault messages, a genset elapsed time hour meter, service countdown reminder, monitors battery voltage changes over multiple periods of time to establish and display the “battery level,” uses the “battery level” to automatically start and stop the genset, and accepts multiple run requests from AC loads such as HVAC systems, and incorporates safety or other start inhibit features.

Abstract: Disclosed is a battery pack management method for HEV and EV. Power for a control signal is applied to a relay of a battery pack connection circuit through a battery management system (BMS) or vehicle control device. Then, current or voltage from a pre-charge resistor of the battery pack connection circuit is detected. Thereafter, the detected current or voltage is compared with standard correspondence information pre-stored in a memory unit of the BMS to determine whether the detected value is within a normal range of the battery pack. A connection between the battery pack and the power conversion circuit is carried out when the detected value is within the normal range as a result of the determination, otherwise a pre-charge relay of the battery pack connection circuit is turned off and then a driver is provided with a warning signal.

Abstract: A battery monitor is provided for use with a battery of an automotive vehicle. The battery monitor can provide real time battery condition measurements and can selectively control the charging of the battery through an alternator of the vehicle based upon the measured battery condition.

Abstract: The car battery system of the present invention is provided with a battery block 2 that retains a plurality of battery cells 1 in a stacked configuration and has a terminal plane 2A, which is coincident with terminal surfaces 1A established by positive and negative battery cell 1 electrode terminals 13; and with a battery state detection circuit 30 that connects with the electrode terminals 13 of each battery cell 1. The battery system is provided with a circuit board 7 with surface-mounted electronic components 40 that implement the battery state detection circuit 30. The circuit board 7 is a single-sided board with electronic components 40 mounted on only one side, and the circuit board 7 is attached to the battery block 2 opposite the terminal plane 2A with the side having no electronic components 40 facing the battery block 2. The positive and negative electrode terminals 13 of each battery cell 1 are connected with the circuit board 7 for connection to the battery state detection circuit 30.

Abstract: Disclosed is an apparatus and method for controlling the discharge or charge power of a battery, capable of preventing over-charge and over-discharge of battery cells according to states of the battery cells, and solving a problem that the lifetime of a conventional battery pack is rapidly reduced due to the over-charge or over-discharge of some cells of the battery pack. The method includes the steps of estimating the maximum power of the battery, measuring voltage of a battery cell or pack, checking whether or not the voltage of the battery cell or pack deviates from a preset limited range so as to correspond to the maximum power, and when the voltage of the battery cell or pack deviates from a preset limited range, controlling the discharge or charge power of the battery.

Abstract: Battery charge indication methods, battery state of charge monitoring devices, rechargeable batteries, and articles of manufacture are described. According to one aspect, a battery charge indication method includes first determining a state of charge of a battery at a first moment in time using a first method, second determining a state of charge of the battery at a second moment in time using a second method different than the first method, and providing information regarding the state of charge of the battery at the first and second moments in time using information of the first and second determinings.

Abstract: An input/output control device for a secondary battery mounted on a vehicle includes a current estimating unit estimating a battery current input to or output from the secondary battery based on an input/output power of the secondary battery and outputting an estimated value (estimated current (Is)), a current sensor measuring the battery current and outputting a measured value (measured current (It)), and an input/output control unit controlling the input/output power based on the estimated value and the measured value. The input/output control device controls the input/output of the secondary battery, using the measured current (It) as well as the estimated value (Is), and therefore can suppress more reliably significant increase in heating value of the secondary battery and its peripheral parts.

Abstract: A method for determining a battery variable, in particular capacity of battery, with the aid of a state variable and parameter estimator, which calculates from operating variables of battery state variables and parameters of a mathematical energy storage model. Capacity of battery may be determined very accurately when the battery is in operation if it is calculated as a function of at least one capacity-dependent parameter.

Abstract: Disclosed are an apparatus and a method for accurately estimating a state of charge of a battery, which can measure a change of temperature and an open circuit voltage so as to estimate the state of charge at an initial time when a vehicle is not driven, and while measuring a decrement in a capacity of a battery according to charging and discharging of the battery when the vehicle is driven. The method includes the steps of: measuring a temperature in an initial estimation of the state of charge; measuring an open circuit voltage; obtaining parameters indicating a change of the open circuit voltage according to a change of temperature; and calculating the state of charge using the parameters and the open circuit voltage which is measured depending on the obtained parameters.

Abstract: A charged state detecting apparatus for a secondary battery is provided, which can suppress deterioration in the accuracy of detecting a charged state, such as an SOC, the deterioration being caused by variation of a polarization state of a battery. The charged state detecting apparatus stabilizes an amount of polarization of the battery, stops power generation upon confirmation of the stabilization of the polarization amount, and sufficiently alters the current of the battery to sample a required number of data pairs of voltage and current of the battery. Using these data pairs, the charged state detecting apparatus detects a charged state, such as the SOC, of the battery.

Abstract: An electronic apparatus with a power indication function is connected to an adapter. The electronic apparatus includes a host, a power jack, a rechargeable battery, a power indication element and a controller. The power jack is disposed on the host for connecting with the adapter. The rechargeable battery is disposed in the host and is electrically connected to the power jack. The power indication element has a switch disposed adjacent to the power jack and a power indicator disposed in the host. The controller is electrically connected to the rechargeable battery, the switch and the power indicator. When the switch turns on, the controller detects the remained power in the rechargeable battery and the remained power is indicated by the power indicator.

Abstract: The car battery system of the present invention is provided with battery blocks 2 that retain a plurality of battery cells 1 in a stacked configuration and have terminal planes 2A, which are coincident with terminal surfaces 1A established by positive and negative battery cell 1 electrode terminals 13; and with battery state detection circuits 30 that connect with the electrode terminals 13 of each battery cell 1 to detect the condition of each battery cell 1. The car battery system implements a battery state detection circuit 30 on a circuit board 7, 87, and the circuit board 7, 87 is mounted on a battery block 2 in a position opposite the terminal plane 2A of the battery block 2. Further, the positive and negative electrode terminals 13 of each battery cell 1 are connected with a circuit board 7, 87 for connection to a battery state detection circuit 30.

Abstract: A method for detecting SOC and SOH of a storage battery includes: calculating an SOC value of the storage battery with use of an SOC calculation unit based on a measured voltage value or a measured current value of the storage battery and calculating an SOH value of the storage battery with use of an SOH calculation unit based on the SOC value; further calculating a new SOC value with use of the SOC calculation unit based on the SOH value and calculating a new SOH value with use of the SOH calculation unit based on the new SOC value, these further calculations of SOC value and SOH value being repeated a prescribed n times of at least one so as to obtain an nth calculated SOC value and an nth calculated SOH value; outputting the nth calculated SOH value as an SOH output value and outputting the nth calculated SOH value as an SOC output value; and storing the SOH output value into a memory.