Denso Corporation

Yuki Tachibana

Nobuo Yamamoto

Yuta Shimonishi

Yoshinori Satou

Shigeki Komine

Tetsuya Watanabe

Takeshi Sada

Yamato Utsunomiya

Hiroki Fujii

A control device comprises an acquisition unit that acquires a current to or from the battery and a voltage of a battery, a calculation unit that calculates an internal resistance of the battery based on the current and the voltage when the regenerative power generation is performed by a rotary electric machine, and a permission determination unit that determines whether to permit an automatic stop of an engine depending on whether restarting of the engine is enabled based on power running drive of the rotary electric machine. The calculation unit calculates a value of the internal resistance each time the regenerative power generation or the power running drive is performed before the engine enters an automatic stop state. The permission determination unit determines whether to permit the automatic stop based on a latest value of the internal resistance among values of the internal resistance calculated by the calculation unit.

Control device

A battery control device incorporated in a battery system including a battery pack with a plurality of unit cells connected in series and a temperature sensor attached to a predetermined unit cell of the plurality of unit cells. In the battery control device, an integrated amount calculator calculates an integrated amount of current flow since start of current conduction through the battery pack. A temperature acquirer acquires a temperature of the predetermined unit cell detected by the temperature sensor as a temperature of each of the plurality of unit cells on a condition that the integrated amount of current flow calculated by the integrated amount calculator is smaller than a predetermined value.

Battery control device

A battery pack includes a secondary battery, a state of charge calculator, an integrated current amount calculator, a differential state of charge calculator, a full charge capacity calculator, and a charging-and-discharging control section. The differential state of charge calculator calculates a differential state of charge between a first state of charge at a first detection timing and a second state of charge at a second detection timing. The integrated current amount calculator calculates an integrated amount of a current flowing to the secondary battery in a subject period from the first detection timing to the second detection timing. The full charge capacity calculator calculates a full charge capacity of the secondary battery based on the differential state of charge and the integrated current amount. The charging-and-discharging control section is configured to restrict one of the charging and the discharging of the secondary battery during the subject period.

Battery pack that calculates full charge capacity of a battery based on a state of charge

A controller for a system includes a first control section and a second control section. The system includes an electrical actuator, a switch switching the electrical actuator between a power supply state and a power cutoff state, and a drive section driving the switch. The drive section outputs, to the switch, a drive signal to drive the switch based on a command signal for switching of the switch. The first control section determines a switch state based on the command signal, and the second control section determines a switch state based on the drive signal. At least one of the first control section and the second control section determines the electrical actuator to be in the power supply state on the condition that the first control section determines the switch to be in the power supply state, and the second control section also determines the switch to be in the power supply state.

Controller

A positive electrode material includes: LiNiMMMnO. &#x3b1; satisfies a relational expression of 0.50&#x3c;&#x3b1;&#x2264;1.33. &#x3b3; satisfies a relational expression of 0.33&#x2264;&#x3b3;&#x2264;1.1. &#x3b7; satisfies a relational expression of 0&#x2264;&#x3b7;&#x2264;1.00. &#x3b2; satisfies a relational expression of 0&#x2264;&#x3b2;&#x3c;0.67. &#x3b5; satisfies a relational expression of 0&#x2264;&#x3b5;&#x2264;1.00. Mis at least one type selected from Co and Ga. Mis at least one type selected from Ge, Sn, and Sb. LiNiMMMnOhas a layered structure which includes a Li layer and a Ni layer. A crystal structure of LiNiMMMnOis a superlattice structure.

Cathode material, non-aqueous electrolyte secondary battery cathode, and non-aqueous electrolyte secondary battery

A positive electrode material includes: LiNiMMMnO; a layered structure including a Li layer and a Ni layer; and a chemical bond of M-O. &#x3b1; satisfies an equation of 0.50&#x3c;&#x3b1;&#x2264;1.33. &#x3b2; satisfies an equation of 0&#x2264;&#x3b2;&#x3c;0.67. &#x3b3; satisfies an equation of 0.33&#x2264;&#x3b3;&#x2264;1.1. &#x3b7; satisfies an equation of 0&#x2264;&#x3b7;&#x2264;1.00. &#x3b5; satisfies an equation of 0&#x2264;&#x3b5;&#x2264;1.00. Mrepresents at least one selected from Co and Ga. Mrepresents at least one selected from Ge, Sn and Sb.

Positive electrode material, positive electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

A positive electrode material includes LiNiMMO, where 0&#x3c;(&#x3b1;+&#x3b7;)&#x2264;2; 0&#x2264;&#x3b7;&#x3c;0.5; 0&#x3c;&#x3b2;&#x2264;2; 0&#x2264;&#x3b3;&#x2264;1; 1&#x2264;(&#x3b1;+&#x3b7;+&#x3b2;)&#x2264;2.1; 0.8&#x3c;&#x3b2;/(&#x3b1;+&#x3b7;); Mis Mn; Mis at least one selected from Ge and Sn; and Ni and Mhas a local structure of six-coordination. The positive electrode material is used for a positive electrode for nonaqueous-electrolyte secondary battery and a nonaqueous-electrolyte secondary battery.

Positive electrode material, positive electrode for nonaqueous-electrolyte secondary battery, and nonaqueous-electrolyte secondary battery

A positive electrode material includes: LiNiMMMnOthat has a layered structure including a Li layer and a Ni layer, and in which a Ni&#x2014;O bond length is shorter than that calculated from the Shannon's ionic radii. &#x3b1; satisfies a relation of 0.50&#x3c;&#x3b1;&#x2264;1.33, &#x3b2; satisfies a relation of 0&#x2264;&#x3b2;&#x3c;0.67, &#x3b3; satisfies a relation of 0.33&#x2264;&#x3b3;&#x2264;1.1, &#x3b7; satisfies a relation of 0&#x2264;&#x3b7;&#x2264;1.00, &#x2208; satisfies a relation of 0&#x2264;&#x2208;&#x2264;1.00, Mrepresents at least one selected from Co and Ga, Mrepresents at least one selected from Ge, Sn and Sb. A positive electrode material may indicate a peak intensity ratio (I/I) of 0.9 or more in a measurement of a powder X-ray diffraction indexed with a space group of R3m.

A positive electrode material includes: a composite oxide of solid solution including LiSnOand LiNiMMMnO. &#x3b1; satisfies an equation of 0.50&#x2264;&#x3b1;&#x2264;1.35. &#x3b2; satisfies an equation of 0&#x2264;&#x3b2;&#x3c;1.0. &#x3b3; satisfies an equation of 0&#x2264;&#x3b3;&#x2264;0.66. &#x3b2; and &#x3b3; satisfies an equation of 0.33&#x2264;&#x3b2;+&#x3b3;&#x2264;1.1. &#x3bd; satisfies an equation of 0&#x2264;&#x3bd;&#x2264;0.66. &#x2208; satisfies an equation of 0&#x2264;&#x2208;&#x2264;1.00. Mrepresents at least one selected from Sn, SbAl. Mrepresents Sb.

Growing community of inventors

Kariya, Japan

Yuki Tachibana