Provided is a battery control device that can accurately detect a state of charge even if characteristics relating to the state of charge change as a result of battery degradation. This battery control device is provided with map data describing the correspondence relationship between an open-circuit voltage and a state of charge of the battery and outputs different state-of-charge values for the same open-circuit voltage according to the amount of elapsed time.

Battery control device

An ECU executes a program including a step of detecting a present location using a GPS system; a step of reading out data of a geographical map proximate to the present location and presenting in the geographical map charging installations including a charging installation employing solar light, together with the location of its vehicle; a step of, if a presentation switching request is made and a real-time solar radiation correction request is made, detecting a solar radiation amount and correcting a charge amount per unit time provided by the power generation installation employing solar light, based on the detected solar radiation amount; and a step of detecting an SOC in the battery to calculate an amount of discharge done until arrival at the charging installation, calculating time required for charging up to a fully charged state, and presenting the time required for charging in the geographical map.

Navigation device presenting information regarding charging and vehicle including same device

The present inventions, in one aspect, are directed to techniques and/or circuitry to applying a charge pulse to the terminals of the battery during a charging operation, measure a plurality of voltages of the battery which are in response to the first charge pulse, determine a charge pulse voltage (CPV) of the battery, wherein the charge pulse voltage is a peak voltage which is in response to the first charge pulse, determine whether the CPV of the battery is within a predetermined range or greater than a predetermined upper limit value and adapt one or more characteristics of a charge packet if the CPV is outside the predetermined range or is greater than a predetermined upper limit value.

Method and circuitry to adaptively charge a battery/cell

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.

Method and apparatus for determining deterioration of secondary battery, and power supply system therewith

An object of the invention is to provide a battery control apparatus capable of accurately obtaining permissible charging or discharging power in keeping with variation of the internal resistance of a battery. The battery control apparatus of this invention includes an internal resistance table in which the internal resistance value of single cells corresponding to the temperature and state of charge thereof are described in association with each of charging or discharging duration time of the single cells. The battery control apparatus calculates a permissible charging current or a permissible discharging current by using the internal resistance value described in the internal resistance table and controls the charging or discharging of the single cells in accordance with the current value thus obtained.

Battery control device and battery system

A method for determining the deterioration of an accumulator battery, hooked up with loads in a system, based on the result of measuring internal resistances of an accumulator battery, the method including predetermining a temperature at which the deterioration of the accumulator battery is determined, calculating temperature correction coefficients, predetermining resistance-voltage conversion factors, measuring the internal resistances and temperature of the accumulator battery, converting the measured internal resistance values into the internal resistance values, converting the internal resistance values at the specified temperature into the terminal discharge voltage values and determining whether the accumulator battery is deteriorated or not by means of comparison of the terminal discharge voltage values.

Method for determining deterioration of accumulator battery, method for measuring internal impedance of secondary battery, equipment for measuring internal impedance of secondary battery, equipment for determining deterioration of secondary battery, and power supply system

Coefficients A and B are calculated from the measured temperature and the measured state of charge. Next, a response voltage Vc is calculated by substituting the measured internal impedance X into a response-voltage correlation equation. Besides, by comparing the response voltage Vc with a predetermined threshold V0, if Vc is bigger than or equal to V0, the battery is determined as normal. By substituting the measured values of internal impedance, temperature, and SOC into the internal impedance calculation formula, a final internal impedance calculation formula is determined by calculating the value of C by an iterating operation. Next, in the case of determining SOH of a battery, by substituting a standard temperature and a standard SOC into the final internal impedance calculation formula, the internal impedance to determine the SOH is calculated. By comparing the internal impedance with SOH determination threshold, the SOH of the battery is determined.

Method and device for determining state of battery, and battery power supply system therewith

A method for estimating the charging rate accurately by approximating the open circuit voltage of a secondary battery with high precision In the charging rate estimating method, initial setting of required parameters is performed in order to estimate the charging rate of a secondary battery for feeding power to a load (step S11), voltage of the secondary battery is measured within a specified time after ending charge/discharge and a plurality of voltage measurements are acquired on the time axis (step S12), sequential calculation is performed using them (steps S14-S21), coefficients of a second or higher order exponential damping function approximating the time characteristics of open circuit voltage of the secondary battery are determined and the converged value of open circuit voltage of the secondary battery is determined at least based on the coefficients thus determined (step S22), and then the charging rate is estimated based on the converged value of open circuit voltage (step S24)

Charging rate estimating method, charging rate estimating unit and battery system

A process of obtaining a charge state amount of an accumulator by charge state amount calculation means according to a set value of a degradation state amount and a process of obtaining a degradation state amount of the accumulator by degradation state amount calculation means according to the charge state amount are repeated by a predetermined number of times not smaller than 2 The degradation state amount obtained lastly by repeating the processes by the predetermined number of times is outputted as a degradation state amount output value The charge state amount obtained lastly is outputted as a charge state amount output value The degradation state amount output value is stored in a memory

Noriyasu Iwane

Papers

Method and apparatus for determining deterioration of secondary battery, and power supply system therewith

Method for determining deterioration of accumulator battery, method for measuring internal impedance of secondary battery, equipment for measuring internal impedance of secondary battery, equipment for determining deterioration of secondary battery, and power supply system

Method and device for determining state of battery, and battery power supply system therewith

Charging rate estimating method, charging rate estimating unit and battery system

Secondary cell degradation judgment method, secondary cell degradation judgment device, and power supply system