Abstract: A battery management unit capable of more reliably turning off a high-voltage relay. A battery management unit 1 includes a high-voltage relay 5 serving as a switch unit that turns on/off electrical connection between a high-voltage battery 102, which is a secondary battery, and an external device, and a power source IC 6 serving as a disconnection control unit having a first disconnection processing function of turning off the high-voltage relay 5 at the time of abnormality of the battery management unit 1 and a second disconnection processing function of detecting an abnormality of the first disconnection processing function and turning off the high-voltage relay 5.

Abstract: A battery management unit capable of more reliably turning off a high-voltage relay. A battery management unit 1 includes a high-voltage relay 5 serving as a switch unit that turns on/off electrical connection between a high-voltage battery 102, which is a secondary battery, and an external device, and a power source IC 6 serving as a disconnection control unit having a first disconnection processing function of turning off the high-voltage relay 5 at the time of abnormality of the battery management unit 1 and a second disconnection processing function of detecting an abnormality of the first disconnection processing function and turning off the high-voltage relay 5.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; a temperature history recording unit that records temperature history pertaining to the temperature detected by the temperature detection unit; and a charge/discharge restriction unit that restricts the charge/discharge current in a low-temperature state based upon the temperature history recorded by the temperature history recording unit.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; and a charge/discharge restriction unit that imposes a first charge/discharge restriction so as to restrict the charge/discharge current based upon the effective current value calculated by the effective current value calculation unit.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; a time ratio calculation unit that determines a time ratio indicating a ratio of a length of time over which the effective current value has been in excess of a predetermined allowable value during a predetermined specified time period; and a charge/discharge restriction unit that restricts the charge/discharge current based upon the time ratio determined by the time ratio calculation unit.

Abstract: A battery control apparatus is provided which can keep an inter-terminal voltage of each single cell within a permitted range while permitted power is controlled in units of a battery pack. The battery control apparatus of the invention restricts the permitted power of the battery pack according to a degree of closeness of a close circuit voltage of the single cell to an upper limit or a lower limit of the permitted range.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; a time ratio calculation unit that determines a time ratio indicating a ratio of a length of time over which the effective current value has been in excess of a predetermined allowable value during a predetermined specified time period; and a charge/discharge restriction unit that restricts the charge/discharge current based upon the time ratio determined by the time ratio calculation unit.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; and a charge/discharge restriction unit that imposes a first charge/discharge restriction so as to restrict the charge/discharge current based upon the effective current value calculated by the effective current value calculation unit.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; a temperature history recording unit that records temperature history pertaining to the temperature detected by the temperature detection unit; and a charge/discharge restriction unit that restricts the charge/discharge current in a low-temperature state based upon the temperature history recorded by the temperature history recording unit.

Abstract: A suppressed noise cell controller includes, corresponding to a number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, terminal LIN1 for inputting control information, terminal LIN2 for outputting control information, terminal Vcc and GND terminal, and terminal LIN2 of a higher-order IC and terminal LIN1 of a lower-order IC are daisy chain connected. The Vcc terminal of each IC is connected to a positive electrode of a higher-order cell among cells constituting a corresponding cell pack via a noise eliminating inductor, and the GND terminal is coupled directly to Vcc of the lower-order IC. Noise isn't superposed on LIN1 or LIN2.

Abstract: A battery control apparatus is provided which can keep an inter-terminal voltage of each single cell within a permitted range while permitted power is controlled in units of a battery pack. The battery control apparatus of the invention restricts the permitted power of the battery pack according to a degree of closeness of a close circuit voltage of the single cell to an upper limit or a lower limit of the permitted range.

Abstract: A cell controller capable of ensuring high safety even when a short occurs among voltage detecting lines without causing increased costs is provided. The cell controller 10 includes a unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 constituting a battery group through each voltage detecting line and a SOC adjusting circuit for adjusting a SOC of each unit cell 1 having resistors 2 for SOC adjustment, switching elements 6, and a bypass control section 8 to exercise on/off control on the switching elements 6. Each resistor 2 is connected in series to each voltage detecting line and the unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 through each of the resistors 2.

Abstract: A state detection device for power supply system comprises: a measurement unit that obtains current, voltage, and temperature at a chargeable and dischargeable power storage unit as measurement values; a storage unit that stores property information of the power storage unit; an arithmetic unit that uses different methods to calculate first and second states of charge for the power storage unit based upon the measurement values and the property information; a conflict detection unit that detects a conflict in an event that a difference between the first state of charge and the second state of charge is equal to or greater than a predetermined threshold; and a correction unit that corrects the property information during charging or discharging of the power storage unit in response to the conflict having been detected by the conflict detection unit.

Abstract: A cell controller with excellent reliability in which noise and soon are suppressed is provided. The cell controller includes, corresponding to the number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, a LIN1 terminal for inputting control information, a LIN2 terminal for outputting control information, a Vcc terminal and a GND terminal, and a LIN2 terminal of a higher-order IC and a LIN1 terminal of a lower-order IC are connected in a daisy chain.

Abstract: A suppressed noise cell controller includes, corresponding to a number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, terminal LIN1 for inputting control information, terminal LIN2 for outputting control information, terminal Vcc and GND terminal, and terminal LIN2 of a higher-order IC and terminal LIN1 of a lower-order IC are daisy chain connected. The Vcc terminal of each IC is connected to a positive electrode of a higher-order cell among cells constituting a corresponding cell pack via a noise eliminating inductor, and the GND terminal is coupled directly to Vcc of the lower-order IC. Noise isn't superposed on LIN1 or LIN2.

Abstract: A state detection device for power supply system comprises: a measurement unit that obtains current, voltage, and temperature at a chargeable and dischargeable power storage unit as measurement values; a storage unit that stores property information of the power storage unit; an arithmetic unit that uses different methods to calculate first and second states of charge for the power storage unit based upon the measurement values and the property information; a conflict detection unit that detects a conflict in an event that a difference between the first state of charge and the second state of charge is equal to or greater than a predetermined threshold; and a correction unit that corrects the property information during charging or discharging of the power storage unit in response to the conflict having been detected by the conflict detection unit.

Abstract: A cell controller capable of ensuring high safety even when a short occurs among voltage detecting lines without causing increased costs is provided. The cell controller 10 includes a unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 constituting a battery group through each voltage detecting line and a SOC adjusting circuit for adjusting a SOC of each unit cell 1 having resistors 2 for SOC adjustment, switching elements 6, and a bypass control section 8 to exercise on/off control on the switching elements 6. Each resistor 2 is connected in series to each voltage detecting line and the unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 through each of the resistors 2.

Abstract: A cell controller with excellent reliability in which noise and soon are suppressed is provided. The cell controller includes, corresponding to the number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, a LIN1 terminal for inputting control information, a LIN2 terminal for outputting control information, a Vcc terminal and a GND terminal, and a LIN2 terminal of a higher-order IC and a LIN1 terminal of a lower-order IC are connected in a daisy chain.