Patent application number | Description | Published |
20090070052 | SECONDARY-BATTERY LIFE ESTIMATION APPARATUS AND METHOD - A secondary-battery life estimation apparatus includes: a voltage measuring portion measuring a terminal voltage of a secondary battery to be measured; a first memory storing in advance a terminal voltage V | 03-12-2009 |
20100001693 | DETERIORATION DETERMINATION CIRCUIT, POWER SUPPLY APPARATUS, AND DETERIORATION DETERMINATION METHOD OF SECONDARY BATTERY - Provided is a deterioration determination circuit configuring by including: an SOC detection unit for detecting an SOC of a secondary battery; an internal resistance detection unit for detecting an internal resistance value of the secondary battery; a first determination unit for determining the status of deterioration of the secondary battery based on the internal resistance value detected by the internal resistance detection unit when the SOC detected by the SOC detection unit is within a range of a pre-set first range; a second determination unit for determining the status of deterioration of the secondary battery based on the internal resistance value detected by the internal resistance detection unit when the SOC detected by the SOC detection unit is within a range of a pre-set second range as a range of an SOC, in which a variation of the internal resistance of the second battery in relation to a variation of the SOC of the secondary battery is different from the first range; and a final determination unit for ultimately determining that the secondary battery is deteriorated when the first determination unit determines that the secondary battery is of the deteriorated status and the second determination unit additionally determines that the secondary battery is of the deteriorated status. | 01-07-2010 |
20100026092 | POWER SOURCE SYSTEM, POWER SUPPLY CONTROL METHOD OF POWER SOURCE SYSTEM, POWER SUPPLY CONTROL PROGRAM OF POWER SOURCE SYSTEM, AND COMPUTER READABLE RECORDING MEDIUM HAVING POWER SUPPLY CONTROL PROGRAM OF POWER SOURCE SYSTEM RECORDED THEREON - A power source system capable of temporarily increasing the power supply capacity of a power accumulator when an interruptible power source is stopped. Upon receiving stop information of the interruptible power source from an integrated control ECU, a controller reduces an operable voltage that is determined as an output voltage for ending discharge of the power accumulator, outputs the reduced operable voltage from a communication part to the integrated control ECU. The integrated control ECU controls a charge/discharge control device based on the reduced operable voltage, and increases the power supply capacity of the power accumulator. | 02-04-2010 |
20100026244 | POWER SOURCE SYSTEM, POWER SUPPLY CONTROL METHOD FOR THE POWER SOURCE SYSTEM, POWER SUPPLY CONTROL PROGRAM FOR THE POWER SOURCE SYSTEM, AND COMPUTER-READABLE RECORDING MEDIUM WITH THE POWER SUPPLY CONTROL PROGRAM RECORDED THEREON - The present invention provides a power source system that increases the power supply capacity of a power source device and continuously supplies the power necessary for a load device when a power source device stops. A control unit has a state quantity setting unit that sets a first target state quantity indicating a state of charge of the power storage device that is to be a target value when charge and discharge of the power storage device are controlled. When the power source device stops, the state quantity setting unit can change the first target state quantity to a second target state quantity that is to be a target value exceeding the first target state quantity and can increase the target state quantity of the power storage device. As a result, when the power source device stops, charge and discharge of the power storage device are controlled on the basis of the target state quantity exceeding that during the operation of the power source device. Therefore, the state of charge of the power storage device can be improved over that during the operation of the power source device. As a result, the power supply capacity of the power source device can be increased and the power necessary for the load device can be continuously supplied, in place of the power source device. | 02-04-2010 |
20100057385 | ACCUMULATOR FAILURE DETECTING DEVICE, ACCUMULATOR FAILURE DETECTING METHOD, ACCUMULATOR FAILURE DETECTING PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING THE ACCUMULATOR FAILURE DETECTING PROGRAM - A device detects a failure in an accumulator formed by connecting a plurality of accumulation portions including at least one accumulation element. Upon determining that the accumulator is in a state close to a failure state from a time interval between equalization processes on the plurality of accumulation portions, the device calculates a failure determination value from a charge and discharge capacity of the accumulator measured after the determination and makes a determination as to whether the accumulator is in a failure state using the failure determination value. | 03-04-2010 |
20100066379 | ABNORMALITY DETECTING DEVICE FOR STORAGE ELEMENT, ABNORMALITY DETECTING METHOD FOR STORAGE ELEMENT, ABNORMALITY DETECTING PROGRAM FOR STORAGE ELEMENT, AND COMPUTER-READABLE RECORDING MEDIUM STORING ABNORMALITY DETECTING PROGRAM - An abnormality detecting device for a storage element is able to improve accuracy of abnormality detection for the storage element. The device includes at least an equalization process portion, an abnormality determination portion, a voltage measurement portion, and a control portion. The control portion issues a command to the equalization process portion to start an equalization process in a case where there is a variance in capacity of storage element blocks B | 03-18-2010 |
20100156356 | METHOD OF QUICK CHARGING LITHIUM-BASED SECONDARY BATTERY AND ELECTRONIC DEVICE USING SAME - A charging current is maintained at a predetermined constant quick charging current (S | 06-24-2010 |
20100174417 | POWER SUPPLY SYSTEM, AND POWER SUPPLY CONTROL METHOD AND POWER SUPPLY CONTROL PROGRAM EMPLOYED IN POWER SUPPLY SYSTEM - A power supply system | 07-08-2010 |
20100253149 | IMBALANCE IDENTIFYING CIRCUIT, POWER SOURCE APPARATUS AND IMBALANCE IDENTIFICATION METHOD - Provided is an imbalance identifying circuit, including: a voltage detection unit for detecting a terminal voltage in each of a plurality of accumulators; a gradient acquisition unit for performing gradient information acquisition processing of suspending charge when the plurality of accumulators are being charged and acquiring, from each of the terminal voltages detected by the voltage detection unit during the suspension of charge, voltage gradient information showing an amount of change per predetermined time of each of the terminal voltages; and an imbalance identification unit for identifying whether an imbalance of the amount of charge in the plurality of accumulators has occurred by using a plurality of pieces of voltage gradient information corresponding to each of the terminal voltages acquired by the gradient acquisition unit. | 10-07-2010 |
20100327818 | CHARGE CONTROL CIRCUIT, AND CHARGING DEVICE AND BATTERY PACK INCORPORATED WITH THE SAME - A charge control circuit that controls a charging section which charges a secondary battery by supplying a charging current to the secondary battery. The charge control circuit includes a voltage detection section which detects a terminal voltage of the secondary battery; a primary charge processing section which performs a charge processing of acquiring, as a first terminal voltage, a terminal voltage detected by the voltage detection section while causing the charging section to charge the secondary battery; a charging suspend voltage acquiring section which causes the charging section to suspend the charge after the first terminal voltage has been acquired by the primary charge processing section, and acquires, as a second terminal voltage, a terminal voltage detected by the voltage detection section in a state that the charge is suspended; and a charging end determining section which determines whether or not the charge of the secondary battery is to be terminated, based on a difference between the first terminal voltage acquired by the primary charge processing section and the second terminal voltage acquired by the charging suspend voltage acquiring section. | 12-30-2010 |
20110121785 | IMBALANCE REDUCTION CIRCUIT, POWER SUPPLY DEVICE, AND IMBALANCE REDUCTION METHOD - An imbalance reduction circuit is configured to include: a temperature-related information acquisition unit for acquiring temperature-related information related to the temperature of a plurality of electric accumulators; a discharge unit for executing an equalization process for discharging the plurality of electric accumulators until terminal voltages of the respective electric accumulators become substantially equal to one another; and an equalization controller for prohibiting the discharge unit from executing the equalization process, when the temperature-related information acquired by the temperature-related information acquisition unit satisfies a low temperature condition that is set as a condition where the discharge performance of the plurality of electric accumulators deteriorates. | 05-26-2011 |
20110199115 | FAILURE DIAGNOSIS CIRCUIT, POWER SUPPLY DEVICE, AND FAILURE DIAGNOSIS METHOD - A failure diagnosis circuit is provided with: a voltage detection unit that detects a terminal voltage of an electricity storage unit; a current detection unit that detects a current flowing in the electricity storage unit; a SOC calculation unit that calculates a SOC of the electricity storage unit on the basis of the current detected by the current detection unit; a charging stopping unit that stops charging of the electricity storage unit when the SOC calculated by the SOC calculation unit reaches a preset determination value; and a failure detection unit that determines that a failure has occurred in the voltage detection unit when a variation of the terminal voltage, which is detected by the voltage detection unit, after the charging is stopped by the charging stopping unit differs from a predicted variation when the SOC of the electricity storage unit is at the determination value. | 08-18-2011 |
20110254559 | BATTERY ABNORMALITY DETECTION CIRCUIT AND POWER SUPPLY DEVICE - A battery abnormality detection circuit includes: a SOC detection unit that detects a SOC of a secondary battery; an internal resistance detection unit that detects an internal resistance value of the secondary battery; a first state acquisition unit that acquires a first SOC and a first resistance value at a predetermined first timing; a second state acquisition unit that acquires a second SOC and a second resistance value at a second timing a storage unit that stores in advance relationship information indicating a correspondence relationship between a SOC and an internal resistance value of the secondary battery; a reference variation value setting unit that sets a reference variation value indicating an amount of variation from an internal resistance value corresponding to the first SOC to an internal resistance value corresponding to the second SOC on the basis of the relationship information stored in the storage unit; and a determination unit that determines that an abnormality has occurred in the secondary battery when an amount of variation from the first resistance value to the second resistance value is different from an amount of variation indicated by the reference variation value that has been set by the reference variation value setting unit. | 10-20-2011 |