Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Daiki Terashima

Motoyoshi Okumura

Satoshi Morioka

Hiromi Ueda

Masahiro Yamada

Takuro Kikuchi

Kojiro Tamaru

Satoshi Hamaoka

Takafumi Yamasaki

Hirokazu Kotake

Tsuyoshi Mariya

Yusuke Hase

The power storage device includes power storage units arranged with a conductive plate interposed therebetween in the vertical direction, each of the power storage units includes an electrode stack including bipolar electrodes stacked with a separator interposed therebetween, and a sealing member provided around the electrode stack so as to seal a housing space formed between adjacent electrodes of the electrode stack. At least one of the power storage units is provided with an overhang member on an outer peripheral surface of the sealing member. The overhang member includes an inclined portion that extends from the outer peripheral surface of the sealing member toward the outside of the power storage unit and inclines downward as it leaves away from the outer peripheral surface of the sealing member, and a top portion formed at a lower end of the inclined portion.

Bipolar battery and power storage device

A power storage device includes a plurality of laminated power storage modules, a flow path member disposed in contact with the power storage modules and having flow paths for allowing a cooling medium to flow along a first direction intersecting a laminating direction of the power storage modules, a pair of restraining plates disposed to sandwich the power storage modules and the flow path member in the laminating direction, fastening members applying a restraining load to the power storage modules and the flow path member via the pair of restraining plates by fastening the restraining plates to each other, and a lead-in duct disposed at one end portion of the flow path member in the first direction and leading the cooling medium into each of the flow paths.

Power storage device

A battery system includes: an alkali secondary battery in which a negative electrode open-circuit potential remains constant within a predetermined SOC range; a temperature sensor configured to detect a temperature of the battery; a current sensor; a voltage sensor; and a controller configured to set an upper limit power value that is discharged from the alkali secondary battery, the controller being configured to: calculate a negative electrode potential of the alkali secondary battery based on the negative electrode open-circuit potential, a resistance value of a negative electrode of the alkali secondary battery, the resistance value being specified from the temperature, and the current value; calculate a positive electrode potential of the alkali secondary battery based on the negative electrode potential and the voltage value; and reduce the upper limit power value below a reference power value when the positive electrode potential is equal to or lower than a threshold.

Battery system configured to set and reduce an upper limit power value that is discharged from an alkali secondary battery

Growing community of inventors

Okazaki, Japan

Daiki Terashima