Toyota Jidosha Kabushiki Kaisha

Chihaya Todoroki

Masato Endo

Hiroaki Sekiyama

Takayuki Sumiya

Kenji Takahashi

Hiroyuki Kaiya

[Task] To accurately estimate a distribution of concentration of lithium in an active material. [Means for Solution] A battery system has a lithium-ion secondary battery () and a controller (). The lithium-ion secondary battery () employs a two-phase coexistence type positive electrode active material (). The controller () calculates a distribution of concentration of lithium in an active material () of the lithium-ion secondary battery, through the use of a diffusion equation in which a boundary condition is set. The controller corrects a diffusion coefficient that is used in the diffusion equation, in accordance with history data indicating a charge/discharge state of the lithium-ion secondary battery to the present time.

Battery system

An information communication system includes an in-vehicle device mounted on a vehicle and a mobile terminal connected to the in-vehicle device so as to be able to cooperate with the in-vehicle device. In the information communication system, when a first software module embedded in the mobile terminal has been updated, a second software module embedded in the in-vehicle device is updated on the basis of software information about the updated first software module.

In-vehicle device, mobile terminal, information management device and information communication system

A navigation device serving as a position information transmission apparatus for transmitting position information about a vehicle to a position information service center includes a terminal ECU that is authorized to log in to the position information service center via networks. The terminal ECU is configured to, in a logged-in state to the position information service center, transmit the position information about the vehicle to the position information service center on condition that a predetermined operation has been performed.

Position information transmission apparatus, position information transmission system, and vehicle

A navigation device, which works as a position information providing device for providing information on positions to a user, includes a terminal ECU that can log in management servers, each of which manages a social networking service (SNS) to which information can be posted, via a line network. The terminal ECU logs in the management servers via the line network in synchronization with a start operation of the navigation device to acquire the whole or a part of posting information on positions posted to the SNS by network users and accumulated in the management servers.

Growing community of inventors

Nisshin, Japan

Chihaya Todoroki