Vehicle Energy Japan Inc.

Hitachi, Ltd.

Daiki Komatsu

Takeshi Inoue

Keiichiro Ohkawa

Shin Yamauchi

Takanori Yamazoe

Kei Sakabe

Ryohhei Nakao

Shigeki Makino

Masahiro Yonemoto

Shuko Yamauchi

Takahiro Araki

Fanny Matthey

Shinji Imai

This control device for controlling an inverter circuit calculates an input current of the inverter circuit on the basis of an output current instruction value for controlling an output current of the inverter circuit, and calculates, on the basis of the calculated input current, an output voltage compensation amount according to the fluctuation amount of an input voltage of the inverter circuit.

Control device and electric vehicle

Provided is a battery system in which a battery cell does not exceed a use limit temperature, and a time taken for returning to the charging/discharging process is shortened even if a frequency for the battery system to stop a charging/discharging process is reduced and the charging/discharging process is stopped. The battery system disclosed in the invention includes a plurality of battery cells and a control circuit which controls a charging/discharging current of the battery cell. The control circuit performs a plurality of temperature rising estimations on the basis of a battery temperature, a charging/discharging current, and a time width of a time window. The control circuit selects the charging/discharging current corresponding to a temperature rising estimation in which the temperature of the battery cell does not exceed a use limit temperature among the temperature rising estimations.

Battery energy storage system, battery management system, and control method for controlling battery temperature

In an existing permissible current computation algorithm, an excessive current is caused to flow by controlling the battery having a steep change region in the battery characteristic. On the other hand, when the current is reduced and the output is suppressed, the battery performance cannot be sufficiently utilized. Moreover, with countermeasures to increase the number of data points, the amount of data increases and thus can not be installed in the microcomputer. A battery control device that computes a permissible current of a battery having a battery characteristic non-steep change region having a small battery characteristic change and a battery characteristic steep change region having a battery characteristic change greater than in the battery characteristic non-steep change region, in which in a case where the battery enters the battery characteristic steep change region after a predetermined time from a present state, a battery characteristic value is calculated by using an absolute value of a slope greater than an absolute value of a slope in the present battery characteristic.

Battery control device, battery system, and vehicle

The state of internal resistance is appropriately expressed for a battery being energized. A battery management system includes a battery information acquisition section, a voltage calculation section, a current fluctuation amount calculation sectionand a resistance correction amount calculation section. The battery information acquisition section acquires a voltage value V of a storage battery being energized. The voltage calculation section acquires a predicted battery voltage value Vof the storage battery being energized by a method different from that of the battery information acquisition section. The current fluctuation amount calculation section calculates a current fluctuation amount dI/dt of the storage battery per unit time. Based on the comparison result of the voltage value V and the predicted battery voltage value Vand the current fluctuation amount dI/dt, the resistance correction amount calculation section corrects an equivalent circuit model expressing the internal state of the storage battery including a DC resistance component Rand a polarization resistance component R.

Battery management system, battery system and hybrid vehicle control system

Growing community of inventors

Tokyo, Japan

Daiki Komatsu