Abstract: A battery system includes an electricity storage device including a plurality of battery units. The electronic control device is configured to switch a travel mode of the vehicle between a CD mode and a CS mode. The electronic control device is configured to calculate a vehicle state of charge at a higher value than an average state of charge when the average state of charge is higher than a threshold value, and calculate the vehicle state of charge at a lower value than the average state of charge when the average state of charge is lower than the threshold value. The threshold value is set at a lower value than a center value between an upper limit value and a lower limit value of the vehicle state of charge.

Abstract: A battery system includes an electricity storage device including a plurality of battery units. The electronic control device is configured to switch a travel mode of the vehicle between a CD mode and a CS mode. The electronic control device is configured to calculate a vehicle state of charge at a higher value than an average state of charge when the average state of charge is higher than a threshold value, and calculate the vehicle state of charge at a lower value than the average state of charge when the average state of charge is lower than the threshold value. The threshold value is set at a lower value than a center value between an upper limit value and a lower limit value of the vehicle state of charge.

Abstract: An electricity storage system includes: an electricity storage unit (10, 11) that is subjected to charging and discharging; a voltage sensor (20, 20a) that detects a voltage value of the electricity storage unit; and a controller (30) that terminates the charging of the electricity storage unit when the detected voltage value reaches a charging termination voltage value. The controller calculates a voltage drop, which is associated with interruption of constant current charging, on the basis of the detected voltage value while the constant current charging is performed in the electricity storage unit, and sets the charging termination voltage value in accordance with the amount of voltage drop.

Abstract: A motor generates a kinetic energy for use in running of a vehicle. An electric storage apparatus is charged and discharged and outputs a driving electric power for the motor through the discharge. A display displays a cruising distance over which the vehicle can be run with the motor. A controller calculates the cruising distance based on a full charge capacity of the electric storage apparatus and displays the cruising distance on the display. When the full charge capacity at a present time is smaller than the full charge capacity at a past time and the electric storage apparatus is not discharged, or when the full charge capacity at the present time is larger than the full charge capacity at the past time and the electric storage apparatus is not charged, the controller displays the cruising distance based on the full charge capacity at the past time on the display.

Abstract: An electrical storage system mounted on a vehicle includes: an electrical storage device that is charged or discharged; and a controller that calculates an SOC on the basis of a correspondence relationship between a voltage of the electrical storage device and an SOC of the electrical storage device and that calculates a full charge capacity of the electrical storage device on the basis of an SOC difference between before and after charging and an accumulated charging current value during charging.

Abstract: An electricity storage system includes: an electricity storage unit (10, 11) that is subjected to charging and discharging; a voltage sensor (20, 20a) that detects a voltage value of the electricity storage unit; and a controller (30) that terminates the charging of the electricity storage unit when the detected voltage value reaches a charging termination voltage value. The controller calculates a voltage drop, which is associated with interruption of constant current charging, on the basis of the detected voltage value while the constant current charging is performed in the electricity storage unit, and sets the charging termination voltage value in accordance with the amount of voltage drop.

Abstract: A motor generates a kinetic energy for use in running of a vehicle. An electric storage apparatus is charged and discharged and outputs a driving electric power for the motor through the discharge. A display displays a cruising distance over which the vehicle can be run with the motor. A controller calculates the cruising distance based on a full charge capacity of the electric storage apparatus and displays the cruising distance on the display. When the full charge capacity at a present time is smaller than the full charge capacity at a past time and the electric storage apparatus is not discharged, or when the full charge capacity at the present time is larger than the full charge capacity at the past time and the electric storage apparatus is not charged, the controller displays the cruising distance based on the full charge capacity at the past time on the display.

Abstract: When an abnormality except for a temperature abnormality of a travel-purpose battery is detected, a battery of the present invention renders a system main relay to make a change to a battery-less travel mode while using a battery cooling fan to cool the travel-purpose battery. When a temperature abnormality of the travel-purpose battery is still detected, a system-off command signal is output to cause the hybrid vehicle to become unable to travel. In this way, limp home mode and system shutoff of the hybrid vehicle can be surely implemented even in the case where an abnormality occurs to the travel-purpose battery.

Abstract: In a traveling mode for controlling traveling of a hybrid vehicle to maintain a charge amount of a power storage device of the hybrid vehicle to fall within a predetermined control range, when a malfunction associated with the power storage device takes place, a control center value defining the control range is set higher than a control center value employed in a normal state and set at a value near a management lower limit value of the charge amount. Then, it is permitted to charge/discharge the power storage device. In this way, upon occurrence of a malfunction of a level that does not require immediate interruption of the charging/discharging of the power storage device, a vehicle operation can be continued using the power storage device while protecting the power storage device.

Abstract: A hybrid ECU executes a program including the steps of: setting a fan driving level F for a cooling fan, as based on a high voltage battery's temperature TB, SOC and input and output currents, and a vehicular cabin's internal temperature and background noise; detecting from a signal transmitted from a voltage sensor the voltage of an auxiliary battery serving as a power supply for the cooling fan; and setting a duty command value for the cooling fan from fan driving level F and the auxiliary battery's voltage so that the duty command value is smaller as a voltage of the auxiliary battery is higher.

Abstract: In a traveling mode for controlling traveling of a hybrid vehicle to maintain a charge amount of a power storage device of the hybrid vehicle to fall within a predetermined control range, when a malfunction associated with the power storage device takes place, a control center value defining the control range is set higher than a control center value employed in a normal state and set at a value near a management lower limit value of the charge amount. Then, it is permitted to charge/discharge the power storage device. In this way, upon occurrence of a malfunction of a level that does not require immediate interruption of the charging/discharging of the power storage device, a vehicle operation can be continued using the power storage device while protecting the power storage device.

Abstract: When the number of battery cells of a certain battery block is different from a reference number of cells, the inter-terminal voltage of the battery block is converted into the voltage corresponding to the reference number of cells. Thus, even when a plurality of battery blocks being different in the number of battery cells are included, a map for calculating the SOC may only be one. That is, since conventional software or calculation methods can be used, it is not necessary to increase the capacity of SOC calculation software or allowable battery output calculation software. As a result, a plurality of assembled batteries being different in the number of battery cells constituting each battery block can appropriately be monitored.

Abstract: When an abnormality except for a temperature abnormality of a travel-purpose battery is detected, a battery ECU 260 of the present invention renders a system main relay to make a change to a battery-less travel mode while using a battery cooling fan to cool the travel-purpose battery. When a temperature abnormality of the travel-purpose battery is still detected, a system-off command signal is output to cause the hybrid vehicle to become unable to travel. In this way, limp home mode and system shutoff of the hybrid vehicle can be surely implemented even in the case where an abnormality occurs to the travel-purpose battery.

Abstract: A degradation state of a lithium-ion battery is determined on the basis of information about a voltage change in the lithium-ion battery obtained in a diagnosis mode in which the lithium-ion battery is successively charged and discharged at a constant power value. The constant power value in the diagnosis mode preferably may vary with the power storage amount and the temperature of the lithium-ion battery. As the information, the degree of a voltage drop in the lithium-ion battery obtained during the discharge can be used.

Abstract: When the number of battery cells of a certain battery block is different from a reference number of cells, the inter-terminal voltage of the battery block is converted into the voltage corresponding to the reference number of cells. Thus, even when a plurality of battery blocks being different in the number of battery cells are included, a map for calculating the SOC may only be one. That is, since conventional software or calculation methods can be used, it is not necessary to increase the capacity of SOC calculation software or allowable battery output calculation software. As a result, a plurality of assembled batteries being different in the number of battery cells constituting each battery block can appropriately be monitored.

Abstract: A battery ECU includes i) a circuit connected to a plurality of battery temperature sensors provided on a plurality of battery cells which make up a battery, and a cooling fan, the circuit detecting operation of the cooling fan, and ii) a circuit that determines that there is a temperature abnormality in a battery based on the difference between a maximum value and a minimum value of battery temperatures measured by the battery temperature sensors only when the period of time during which temperature increases within a predetermined period of time in the battery temperatures measured by the battery temperature sensors continue to be less than a threshold value is longer than a predetermined period of time, and the cooling fan has been operating for a longer period of time than a suitable cooling fan operating time obtained based on the difference between the maximum value and the minimum value of the measured battery temperatures.

Abstract: A hybrid ECU executes a program including the steps of: setting a fan driving level F for a cooling fan, as based on a high voltage battery's temperature TB, SOC and input and output currents, and a vehicular cabin's internal temperature and background noise; detecting from a signal transmitted from a voltage sensor the voltage of an auxiliary battery serving as a power supply for the cooling fan; and setting a duty command value for the cooling fan from fan driving level F and the auxiliary battery's voltage so that the duty command value is smaller as a voltage of the auxiliary battery is higher.

Abstract: A fan system is provided which keeps a record of the electric connection between a battery ECU and an accessory battery and starts a fan if it is determined based on the record that the electric connection between the battery ECU and the accessory battery was just in an unconnected state.

Abstract: A fan system is provided which keeps a record of the electric connection between a battery ECU and an accessory battery and starts a fan if it is determined based on the record that the electric connection between the battery ECU and the accessory battery was just in an unconnected state.

Abstract: A battery ECU includes i) a circuit connected to a plurality of battery temperature sensors provided on a plurality of battery cells which make up a battery, and a cooling fan, the circuit detecting operation of the cooling fan, and ii) a circuit that determines that there is a temperature abnormality in a battery based on the difference between a maximum value and a minimum value of battery temperatures measured by the battery temperature sensors only when the period of time during which temperature increases within a predetermined period of time in the battery temperatures measured by the battery temperature sensors continue to be less than a threshold value is longer than a predetermined period of time, and the cooling fan has been operating for a longer period of time than a suitable cooling fan operating time obtained based on the difference between the maximum value and the minimum value of the measured battery temperatures.