Toyota Jidosha Kabushiki Kaisha

Toyota Motor Europe

Nachi - Fujikoshi Corporation

Yoshio Matsuyama

Tomohide Sumi

Yosuke Shimura

Koji Takahata

Takahiro Sakurai

Takashi Harayama

Kiwamu Kobayashi

Yoshiaki Kawakami

Ruri Tanaka

Tomoyasu Furuta

Hideto Mori

Masataka Ogushi

Yugo Mochizuki

A vehicle includes: a battery that is chargeable with electric power supplied from a charger provided outside the vehicle; and an air-conditioning and cooling system that cools the battery. An ECU controls a charging operation for the battery such that the battery is charged under a charging condition of a constant current which is constant over a charging period from start of charging to satisfaction of a completion condition. The ECU sets the charging condition such that a battery temperature when the completion condition is satisfied becomes an upper limit temperature, based on an amount of heat generation in the battery caused by charging and an amount of cooling of the battery by the air-conditioning and cooling system.

Vehicle and method for controlling vehicle

By a first energization process of applying a voltage with the power supply to cause a current for charging the electrical storage device to flow through the circuit and a second energization process of, when a transition condition is satisfied during the first energization process, decreasing the voltage of the power supply to cause the current to further flow, a condition of an electrical storage is determined. An effective resistance value of the circuit is set to 0.1&#x3a9; or below. A decrease in the voltage of the power supply in transition from the first energization process to the second energization process is set such that the effective resistance value in the second energization process is an intermediate value between a parasitic resistance value of the circuit and the effective resistance value in the first energization process.

Test method and manufacturing method for electrical storage device

A method of performing a formation process for a lithium-ion cell having an anode, a cathode, an electrolyte and a separator, the formation process including adding an additive to the electrolyte for improving a solid electrolyte interface build-up on the anode, performing a first charge of the cell at a first predetermined rate, performing a cycle of discharging/charging the cell at the first predetermined rate, repeating the cycle until a cycle maximum dQ/dV peak value is smaller than or equal to a predetermined dQ/dV value during charging of the cell and charging the cell to a fully charged capacity at a second predetermine rate, the second predetermined rate being greater than the first predetermined rate.

Lithium-ion battery formation process

An inspection method for a secondary battery according to the invention includes: a first aging treatment process for performing aging treatment on the secondary battery that has initially been charged at a first temperature; a first voltage measurement process; a second aging treatment process for performing the aging treatment on the secondary battery at a second temperature; a second voltage measurement process; a self-discharge amount computation process; a non-temperature dependent failure determination process for determining non-temperature dependent failure that does not depend on a relationship between a self-discharge amount and a temperature in accordance with the measured self-discharge amount; and a temperature dependent failure determination process for determining temperature dependent failure that depends on the relationship between the self-discharge amount and the temperature in accordance with the self-discharge amount, temperature dependency of which is suppressed.

Inspection method for secondary battery

An inspection method of a secondary battery according to the present invention includes: a charging step of charging an inspection target cell to a predetermined voltage set in advance; a voltage drop amount calculation step of calculating an amount of a voltage drop due to discharge by discharging the inspection target cell at a voltage of not more than the predetermined voltage; a non-defective product determination step of determining that the inspection target cell is a non-defective product, when the voltage drop amount is a threshold or less; and an aging step of performing aging after the non-defective product determination step.

Inspection method of secondary battery

An initial charging method for a lithium-ion battery according to this embodiment includes preparing a cell having a positive electrode, a negative electrode, and an electrolyte and charging the cell by using voltages based on the amount of change in a capacity of the cell per unit voltage as a specified voltage.

Initial charging method and production method for lithium-ion battery

A nonaqueous electrolyte battery provided by the present invention includes: an electrode body () having a flat shape and including a positive electrode and a negative electrode (); a square-shaped battery case () configured to accommodate therein the electrode body () and a nonaqueous electrolyte; and a negative electrode collector terminal () placed in the battery case () and connected to the negative electrode () of the electrode body (). The negative electrode collector terminal () is mainly made of copper or copper alloy. An insulator film () configured to insulate the battery case () from the electrode body () is placed between an inner wall () of the battery case () and the electrode body (). The insulator film () is joined to the inner wall () of the battery case (), and the insulator film () is placed so as not to make contact with the negative electrode collector terminal ().

Growing community of inventors

Nisshin, Japan

Yoshio Matsuyama