Abstract: Disclosed herein is a method of calculating the SOC of a battery. The method includes the steps of receiving information about a previous SOC mode and operation time in the mode from memory of a battery controller after startup of the vehicle; calculating a battery SOC data value using one of respective different reference capacities depending on whether a normal SOC preservation mode, a high SOC range expansion mode, or a low SOC range expansion mode using the battery controller and transmitting the battery SOC data value to a vehicle controller; and determining whether conditions for entering a next SOC mode is met after calculation of an actual SOC value of the battery in the normal SOC preservation mode, the high SOC range expansion mode, or the low SOC range expansion mode.

Abstract: Disclosed herein is a method of calculating the aging factor of a battery for a hybrid vehicle.

Abstract: A method for calculating available power of a battery includes steps of calculating an equivalent charge resistance at a current charge current, a current SOC (state of charge), and a current battery temperature using predetermined equivalent charge resistance data, calculating an effective no-load charge voltage at the current charge current, the current SOC, and the current battery temperature using predetermined effective no-load charge voltage data, calculating a maximum charge current based on the equivalent charge resistance, the effective no-load charge voltage, and a predetermined maximum charge voltage, and calculating available charge power based on the maximum charge current, the predetermined maximum charge voltage, and a predetermined battery maximum current. A system for executing the method is also disclosed.

Abstract: Disclosed herein is a method of calculating the aging factor of a battery for a hybrid vehicle.

Abstract: A method for determining a steady state battery terminal voltage is provided. An equivalent charge (or discharge) resistance is determined based on predetermined equivalent charge (or discharge) resistance data, and an effective no load charge (or discharge) voltage is determined based on predetermined effective no load charge (or discharger) voltage data. The steady state battery terminal voltage is calculated based on the calculated equivalent charge (or discharge) resistance and the calculated effective no load charge (or discharge) voltage.

Abstract: Disclosed herein is a method of calculating the SOC of a battery. The method includes the steps of receiving information about a previous SOC mode and operation time in the mode from memory of a battery controller after startup of the vehicle; calculating a battery SOC data value using one of respective different reference capacities depending on whether a normal SOC preservation mode, a high SOC range expansion mode, or a low SOC range expansion mode using the battery controller and transmitting the battery SOC data value to a vehicle controller; and determining whether conditions for entering a next SOC mode is met after calculation of an actual SOC value of the battery in the normal SOC preservation mode, the high SOC range expansion mode, or the low SOC range expansion mode.

Abstract: A method for determining a steady state battery terminal voltage is provided. An equivalent charge (or discharge) resistance is determined based on predetermined equivalent charge (or discharge) resistance data, and an effective no load charge (or discharge) voltage is determined based on predetermined effective no load charge (or discharger) voltage data. The steady state battery terminal voltage is calculated based on the calculated equivalent charge (or discharge) resistance and the calculated effective no load charge (or discharge) voltage.

Abstract: A method for resetting a state of charge of a battery for a hybrid electric vehicle comprises: determining whether a discharge current of the battery is greater than a predetermined discharge current; determining whether a minimum voltage module has changed, if the discharge current of the battery is greater than the predetermined discharge current; determining whether a theoretical discharge voltage is greater than a voltage of the minimum voltage module, if the minimum voltage module has changed; determining whether the theoretical discharge voltage remains greater than the voltage of the minimum voltage module for a predetermined period of time, if the theoretical discharge voltage is greater than the voltage of the minimum voltage module; and setting a state of charge of the battery as a very low state, if the theoretical discharge voltage remains greater than the voltage of the minimum voltage module for the predetermined period of time.

Abstract: A method for resetting a state of charge of a battery for a hybrid electric vehicle comprises: determining whether a discharge current of the battery is greater than a predetermined discharge current; determining whether a minimum voltage module has changed, if the discharge current of the battery is greater than the predetermined discharge current; determining whether a theoretical discharge voltage is greater than a voltage of the minimum voltage module, if the minimum voltage module has changed; determining whether the theoretical discharge voltage remains greater than the voltage of the minimum voltage module for a predetermined period of time, if the theoretical discharge voltage is greater than the voltage of the minimum voltage module; and setting a state of charge of the battery as a very low state, if the theoretical discharge voltage remains greater than the voltage of the minimum voltage module for the predetermined period of time.

Abstract: A method for determining a maximum charge current of a battery is provided which comprises: determining a steady-state charge resistance based on a current state of charge of the battery; determining a no-load charge voltage based on the current state of charge of the battery; calculating a maximum temporary charge current; and calculating a maximum charge current based on the maximum temporary charge current.

Abstract: Apparatus for charging the battery of an electric car. The apparatus comprising a battery charge controller, a battery charger, and a battery. The charge controller being capable of detecting the charge status of the battery, and upon detecting an under-charge condition of initializing, at any given time, a charging process wherein the battery is charged an expected charge amount which is dependant on the degree of under-charge initially detected by the charge controller. The charge controller upon termination of the charging process detects the actual charge amount and compares that amount to the expected charge amount and calculates a difference value. If the difference value exceeds a predetermined reference value, the controller charges the battery pack an additional predetermined amount.

Abstract: A method for controlling charging the battery of an electric vehicle, wherein upon commencement of charging, a current charged state of a battery is measured to calculate an anticipated charging current to enable the completion of the battery charging. The degree of an undercharged state is determined in consideration of current battery aging to overcharge the battery as much as the undercharge, thereby preventing a battery performance degradation caused by continuous undercharging. A battery aging state in consideration of battery cycling is determined to increase calculation accuracy of the battery charging state, to thereby improve a running distance of the electric vehicle by maintaining an initial charge state.

Abstract: Disclosed is a device and method for charging an electric car battery pack that charges by receiving power and discharges to supply power. A battery charging controller controls charging the battery pack at a constant power, and when the voltage of the battery pack is over a first voltage, controls a constant current charging process, and after this, each time a peak value of the battery pack is over a second voltage, controls a sequential reduction of current and performs a constant current charging process, and when the voltage of the battery pack is over a third voltage, controls a constant current charging process at a fourth voltage, and when the charging voltage is over a fifth voltage, controls a termination of the charging process. A battery charger receives external power according to the control of the battery charging controller, and charges the battery.