Nissan Motor Company Limited

Utaka Kamishima

Tsuyoshi Morita

Shinsuke Nakazawa

Tomonaga Sugimoto

Kouichi Akabori

Yuji Nakada

A method for controlling charge after judging as to whether a charging cable CC connected to a charging inlet Eof a vehicle conforms to standards has detecting whether a control signal is outputted from the charging cable CC and whether power is supplied from the charging cable CC after the charging cable CC is connected to the charging inlet Euntil a main switch E, Eof a power feed line Eof the vehicle is switched ON; judging that the charging capable CC does not conform to the standards at least when no control signal is detected and the power is detected; and forbidding the charge or limiting a charging current through the charging cable CC when judging that the charging cable CC does not conform to the standards.

Charging control apparatus and charging control method

A charging control method for controlling a charge operation to a storage unit Eof a vehicle, using a charging cable CC that is connected to a charging inlet Eof the vehicle and supplies power to the storage unit Efrom an external power supply BP provided outside the vehicle, the method has detecting connection of the charging cable CC to the charging inlet E, detecting a command signal of a disconnection command unit Cof the charging cable CC, pausing the charge operation to the storage unit Ewhile maintaining a closed state of relay switches C, E, Eof a vehicle side power supply line for only a predetermined time when detecting the command signal of the disconnection command unit Cwhich indicates the disconnection in a state where the charging cable CC is connected to the charging inlet E, and restarting the charge operation to the storage unit Ewhen detecting a command signal of the disconnection command unit Cwhich indicates cancel of the disconnection during the predetermined time.

A secondary battery remaining capacity estimating apparatus basically includes a secondary battery, a charge/discharge determining section, a remaining capacity estimating section, a remaining capacity indicating section and a remaining capacity indication limiting section. The charge/discharge determining section determines if the secondary battery is charging or discharging. The remaining capacity estimating section estimates a remaining electric power capacity of the secondary battery. The remaining capacity indicating section indicates a remaining capacity of the secondary battery based on an estimation value by the remaining capacity estimating section. The remaining capacity indication limiting section limits a decrease of a remaining capacity indicated upon determining that the secondary battery is charging and the estimation value will decrease, and limits an increase of a remaining capacity indicated upon determining that the secondary battery is discharging and the estimation value will increase.

Secondary battery remaining capacity estimating apparatus

A battery remaining capacity detecting apparatus includes a remaining capacity calculating section, first and second target remaining capacity calculating sections and a remaining capacity revising section. The first and second target remaining capacity calculating sections are configured to calculate first and second target remaining capacities using first and second calculation processes when first and second prescribed battery related conditions are satisfied, respectively. The second calculating process has a lower accuracy than the first calculation process, and the second prescribed battery related condition is satisfied with a higher frequency than the first prescribed battery related condition. The remaining capacity revising section is configured to revise the remaining capacity toward the first and second target remaining capacities using revision amounts equal to or smaller than first and second revision amount upper limit values, respectively with the second revision amount upper limit value being smaller than the first revision amount upper limit value.

Battery remaining capacity detecting apparatus and battery remaining capacity detecting method

An apparatus and method for detecting total voltage of an assembled battery including a number of serially-connected electric cells. Voltages of the respective cells are detected and added up, correlation between the resulting total voltage and a total voltage obtained by detecting the voltage of the assembled battery directly from its terminals is obtained, and a corrective arithmetic operation is carried out inside the device to correct the total voltage obtained through direct detection. The total voltage is detected with a high degree of accuracy without the need for individual adjustment operations using a variable resistance, high-accuracy external tester.

Voltage detector for an assembled battery

After a vehicle is started up, a voltage value detected by a voltage sensor while a voltage detection target and the voltage sensor are disconnected from each other is obtained as an offset voltage, and the voltage value detected by the voltage sensor is corrected based upon the offset voltage thus obtained.

Offset correction apparatus and offset correction method for automotive voltage sensor

A battery pack of a series combination of cell units is connected with a motor drive control circuit to drive a traction motor for a vehicle. A current sensor senses a discharge/charge current of the battery pack, and a voltage detecting circuit senses a voltage between two separate points in the series combination of the battery pack. A memory section stores a reference voltage drop quantity representing a decrease in voltage during a predetermined time interval between the two separate points. An offset detecting section compares an actual voltage drop quantity sensed by the voltage detecting circuit, with the reference voltage drop quantity, thereby detects a non-discharge/charge-current state of the current sensor, and reserves an output of the current sensor, as an offset quantity upon the detection. A correcting section corrects a sensed value of the discharge/charge current with the reserved offset quantity.

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Kawasaki, Japan

Utaka Kamishima