Abstract: A monitoring unit outputs a first current detection value having a relatively wide measurement range and a relatively short detection cycle and a second current detection value having a relatively high resolution, to a charging ECU. When charging power calculated using the first current detection value exceeds a predetermined limit value, the charging ECU controls a charger to reduce charging power (protection control). Further, the charging ECU controls the charger such that a power storage device attains a predetermined fully charged state based on charging power calculated using the second current detection value (full charge control).

Abstract: A PM-ECU executes a program including: a step (S104) of estimating pre-charge SOC(1) when a plug-in charge is started (YES in S100), a step (S108) of calculating an integrated value of charging current when integration permitting conditions are satisfied (YES in S104, YES in S106), a step (S112) of setting a final integrated value when the charge is completed, a step (S116) of estimating post-charge SOC(2) when an ignition switch is turned on (YES in S114), a step (S122) of calculating a full-charge capacity of this cycle when calculation conditions are satisfied (YES in S120), a step (S128) of calculating a new full-charge capacity when the full-charge capacity of this cycle is within a specified range (YES in S124), and a step (S130) of updating the full-charge capacity by setting the new full-charge capacity as the current full-charge capacity when the new full-charge capacity is within a specified range (YES in S128).

Abstract: A power supply system for a hybrid vehicle includes a main power storage device and a plurality of sub power storage devices used selectively. When an SOC of one of the plurality of sub power storage devices decreases to a predetermined value or smaller, an ECU selects this sub power storage device as a sub power storage device to be charged. The ECU controls a connecting unit such that the sub power storage device to be charged is connected to a second converter. Furthermore, the ECU selects the HV mode as the travel mode. In the HV mode, electrical energy stored in an electric powered vehicle is maintained because of electric power generation by an engine.

Abstract: A control device for a secondary battery includes an offset addition unit calculating an offset amount based on a plurality of voltage values sensed by a sensor, the number of a plurality of battery cells included in one battery block and a preset range, and adding an offset amount to the sensed voltage values, when a flag is turned on to indicate the fact the voltage value of one of the battery cells falls within a preset range, and also includes an I/O control unit controlling charge/discharge of the battery based on voltage values containing the offset amount added thereto. Even when the battery voltage is sensed a battery block at a time, the voltage value can be controlled a cell at a time.

Abstract: When a vehicle is set to a travel control mode or external charging mode, a vehicle system is activated for executing the control mode to which the vehicle is set. A converter ECU selects one sub power storage unit to be used first after activation of the vehicle system, based on a power storage unit used after preceding activation as read from a memory unit contained in the converter ECU and based on respective states of charge of sub power storage units, and electrically connects the selected sub power storage unit and a converter via a switch circuit. When the vehicle system is activated for executing the travel control mode, the converter ECU updates information about the power storage unit used after preceding activation as stored in the memory unit, to information about the power storage unit used first after the present activation of the vehicle system.

Abstract: An SOC calculating unit calculates a first value based on an open voltage of a battery upon startup of a vehicle (when the operation of the battery starts), and has a calculated second value stored in a storage unit upon stop of the vehicle (when the operation of the battery ends). An initial value selecting unit selects the first value as an initial value when a predetermined condition is satisfied, and selects the second value as the initial value when this condition is not satisfied. In a case where the first value has low reliability, the second value is set as the initial value even if the second value may be deviated from an actual SOC value. This can reduce a difference between the SOC value stored in advance and the actual SOC value as compared with that in a case where the first value is set as the initial value.

Abstract: A battery charge/discharge control device (20) includes an input-enabled power adjustment unit (40) having an input-enabled current value calculation unit (42) and an input power limit value calculation unit (44). The input-enabled current value calculation unit (42) uses a battery current value, a battery temperature value, and an estimated charge capacity value at the time “t” upon execution of detection, so as to obtain an input-enabled current value reduction amount per unit time during charge and an enabled current amount recovery amount per unit time when being left uncontrolled.

Abstract: The object aims to prevent or reduce the deterioration of a secondary battery by charge with an undue pulse. Disclosed is a discharge control device (100) for a secondary battery, which comprises: a detection unit (110) for detecting the charge of the secondary battery with a pulse having a level equal to or higher than a predetermined level; and a discharge control unit (130) for so controlling that at least one pulse having almost the same level as that of the above-mentioned pulse is discharged from the secondary battery when the charge of the secondary battery with the above-mentioned pulse is detected.

Abstract: A vehicle comprising a chargeable/dischargeable battery, a current sensor for detecting the current from the battery, and a control unit for estimating the charged state of the battery and controlling the charging/discharging of the battery according to the charged state. In a first operation mode in which charging and discharging cycles are repeated, the control unit estimates the open-circuit voltage of the battery, and determines the charged state on the basis of the value which is obtained by correcting the open-circuit voltage according to the polarization. In a second operation mode in which either one of charging and discharging is continued, the control unit determines the charged state on the basis of the result of integration of the current detected by the current sensor. Hence, the charged and discharged amperehours are large, thereby providing a vehicle which can effectively utilize the secondary battery.

Abstract: A vehicle includes a charging unit receiving electric power from an external power source and externally charging a power storage unit. When a connector unit is coupled to the vehicle and a state ready for charging by the external power source is attained, a controller predicts degradation ratio of the power storage unit at the time point of completion of external charging based on degradation characteristic of the power storage unit in connection with SOC and battery temperature obtained in advance, and sets target state of charge of each power storage unit based on the battery temperatures so that the predicted degradation ratio does not exceed tolerable degradation ratio at the time point of completion of external charging. Then, the controller controls corresponding converters such that SOCs of power storage units attain the target states of charge.

Abstract: When a vehicle is set to a travel control mode or external charging mode, a vehicle system is activated for executing the control mode to which the vehicle is set. A converter ECU selects one sub power storage unit to be used first after activation of the vehicle system, based on a power storage unit used after preceding activation as read from a memory unit contained in the converter ECU and based on respective states of charge of sub power storage units, and electrically connects the selected sub power storage unit and a converter via a switch circuit. When the vehicle system is activated for executing the travel control mode, the converter ECU updates information about the power storage unit used after preceding activation as stored in the memory unit, to information about the power storage unit used first after the present activation of the vehicle system.

Abstract: An SOC calculating unit calculates a first value based on an open voltage of a battery upon startup of a vehicle (when the operation of the battery starts), and has a calculated second value stored in a storage unit upon stop of the vehicle (when the operation of the battery ends). An initial value selecting unit selects the first value as an initial value when a predetermined condition is satisfied, and selects the second value as the initial value when this condition is not satisfied. In a case where the first value has low reliability, the second value is set as the initial value even if the second value may be deviated from an actual SOC value. This can reduce a difference between the SOC value stored in advance and the actual SOC value as compared with that in a case where the first value is set as the initial value.

Abstract: A control device for a secondary battery includes an offset addition unit (62) calculating an offset amount based on a plurality of voltage values (V0-Vn) sensed by a sensor, the number of a plurality of battery cells included in one battery block and a preset range, and adding an offset amount to the sensed voltage values (V0-Vn), when a flag (FLG) is turned on to indicate the fact the voltage value of one of the battery cells falls within a preset range, and also includes an I/O control unit (64) controlling charge/discharge of the battery based on voltage values (V0A-VnA) containing the offset amount added thereto. Even when the battery voltage is sensed a battery block at a time, the voltage value can be controlled a cell at a time.