摘要:
A battery voltage measurement device includes: a plurality of first switching sections, wherein each pair of adjacent first switching sections sequentially selects two output terminals of each of a plurality of battery blocks included in a battery pack; a level change section for changing a level of a battery voltage of each battery block which is input to the level change section via the first switching section; an A/D conversion section for performing an A/D conversion of battery voltage data output from the level change section; and a reference voltage control section for controlling an output of a reference voltage of the level change section according to the polarity of the voltage input to the level change section.
摘要:
A signal correction apparatus includes: a measurement signal generator for generating a measurement signal; a reference signal generator for generating a reference signal; a signal processing section for processing the measurement signal and the reference signal; a signal measurement section for measuring at a first time the reference signal having been processed by the signal processing section, measuring at a second time the reference signal having been processed by the signal processing section, and thereafter measuring the measurement signal having been processed by the signal processing section; and a correction section for performing a correction on the measurement signal having been processed by the signal processing section and measured by the signal measurement section, based on a change from the reference signal having been processed by the signal processing section and measured at the first time to the reference signal having been processed by the signal processing section and measured at the second time.
摘要:
Provided is an energy management system which can increase the awareness of energy saving. The energy management system according to the present invention includes a home appliance A located in a home, an external portable terminal PT, and a center device SV connected to the home appliance A and portable terminal PT via internet NT. The home appliance A includes an energy management unit 3 and a display control device CV. The center device SV stores for each home the electricity usage at a main breaker Bs and at branch breakers Bmn that is transmitted from the energy management unit 3 of each home. In the center device SV, the ranking in terms of the electricity usage or a degree of a decrease of the electricity usage is made relative to other homes on the basis of the stored electricity usage. The ranking is made for each home and transmitted to the display control device CV of the corresponding home.
摘要:
A secondary battery charge control method includes: a charge control step of executing charging by supplying a charge current to a secondary battery; a charge information acquisition step of acquiring information relating to the charging executed in the charge control step; a storage step of storing the information acquired in the charge information acquisition step as charge data; and a charge inhibition determination step of determining whether to inhibit the charging in the charge control step on the basis of the charge data of a previous cycle that have been stored in the storage step when charging in the charge control step is started again after charging in the charge control step has been completed.
摘要:
A battery warming circuit is a circuit installed in a vehicle provided with an inverter circuit, which is supplied with direct current electrical power from a secondary battery, and a 3-phase alternating current motor, and this circuit includes: a switch control unit, which has first and second terminals connected to control terminals of first and second switching elements, and controls turning the first and second switching elements on and off; an accumulation unit which has a third terminal connected to the other end of a specific coil, and accumulates back electromotive force generated in the specific coil by turning the second switching element on and off, with the first switching element being turned on; and a charging control unit which is provided between the positive electrode of the secondary battery and the accumulation unit, and supplies electrical power accumulated in the accumulation unit to the secondary battery.
摘要:
Provided is an energy management system which can increase the awareness of energy saving. The energy management system according to the present invention includes a home appliance A located in a home, an external portable terminal PT, and a center device SV connected to the home appliance A and portable terminal PT via internet NT. The home appliance A includes an energy management unit 3 and a display control device CV. The center device SV stores for each home the electricity usage at a main breaker Bs and at branch breakers Bmn that is transmitted from the energy management unit 3 of each home. In the center device SV, the ranking in terms of the electricity usage or a degree of a decrease of the electricity usage is made relative to other homes on the basis of the stored electricity usage. The ranking is made for each home and transmitted to the display control device CV of the corresponding home.
摘要:
A pulse charge method for a nonaqueous electrolyte secondary battery, includes: a charge control step of pulse charging by supplying a pulsed current periodically to the nonaqueous electrolyte secondary battery; a battery voltage detection step of measuring a battery voltage of the nonaqueous electrolyte secondary battery; a comparison step of comparing the battery voltage, measured in the battery voltage detection step when the pulsed current is supplied, with a predetermined set voltage; and a charge end control step of ending the pulse charging when a comparison result shows that the measured battery voltage is equal to or higher than the set voltage.
摘要:
There is a ground-fault resistance measurement circuit which measures a ground-fault resistance between a conductive frame body of electrical equipment and a charge section insulated from the frame body. This ground-fault resistance measurement circuit includes: a capacity which is connected between the charge section and the frame body; a switch which opens and closes a connection path between the charge section and the capacity; a charging unit which charges the capacity to a predetermined voltage; a voltage measurement section which measures a charging voltage of the capacity; a discharge control section which connects the capacity and the charge section after the capacity is charged, and discharges the capacity; and a calculation section which calculates a resistance between the charge section and the frame body, based on a change in the charging voltage of the capacity.
摘要:
A method for inspecting relay open/close contacts for a contact weld is provided, each relay open/close contact being connected serially to each of a plurality of battery pack blocks. Battery ECUs for controlling the operating condition of each of the battery pack blocks employ one battery pack block for transmitting an inspection signal and the other battery pack blocks for receiving the inspection signal, such that the transmitting battery ECU transmits the inspection signal with its open/close contact closed. When any one of the other battery pack blocks receives the inspection signal at its battery ECU in which its open/close contact has not been closed, the open/close contact is determined to be welded. This inspection is performed successively with the transmitting and receiving battery ECUs being employed alternately in order to check the plurality of open/close contacts and their secondary open/close contacts for a contact weld.
摘要:
The vehicular insulation resistance detection apparatus includes a cyclic signal generating unit that generates a cyclic signal, a first resistor that has one end to which the cyclic signal is applied, a first capacitor that has one end connected to the other end of the first resistor and the other end connected to a high-voltage circuit, a second capacitor that has one end connected to the other end of the first resistor, a second resistor that has one end connected to the other end of the second capacitor and the other end connected to a low-voltage ground that is a circuit ground of a low-voltage circuit, a series circuit that includes a diode and a third resistor connected in series, and is connected in parallel with the second capacitor, this diode having a forward direction coincident with a direction from the other end of the second capacitor to the one end of the second capacitor, a voltage detection unit that detects a voltage between the low-voltage ground and the other end of the second capacitor as a detection signal, and an insulation resistance detection unit that detects a resistance value of an insulation resistance based on an amplitude of the detection signal.