Toyota Jidosha Kabushiki Kaisha

Shinya Kuroki

Seiichi Matsumoto

Hiroyuki Kawaki

Kazuhiro Uchida

Hisataka Fujimaki

Hisanao Kojima

Hideto Mori

Shinya Kamada

Kiyokazu Ito

Provided is a method for manufacturing a lithium secondary battery which is capable of preventing a local deposition of a metallic foreign substance at a negative electrode regardless of the type of a positive electrode and in which a short-circuit is less likely to occur. The present manufacturing method comprises: a step of assembling a cell that includes a positive electrode, a negative electrode, and a nonaqueous electrolyte; a micro charging step of performing a micro charge on the assembled cell before performing an initial conditioning charge until a positive electrode potential with respect to a metal lithium (Li) reference electrode exceeds an Me dissolution potential set in advance at which a mixing-anticipated metal species (Me) starts to dissolve; and an Me dissolution potential holding step of holding the positive electrode potential of the cell at or above the Me dissolution potential for a prescribed period of time after the micro charge.

Method for manufacturing lithium secondary battery

In an ultrasonic measuring method for measuring the thickness of a coating material applied by coating to one surface or both surfaces of a substrate made of a metal so as to provide a coated product, a pair of first ultrasonic sensor and second ultrasonic sensor are provided such that the first ultrasonic sensor is placed on one side of the coated product, as viewed in its thickness direction, via an air layer, while the second ultrasonic sensor is placed on the other side of the coated product, via an air layer, and the thickness of the coating material is measured by transmitting ultrasonic waves between the first and the second ultrasonic sensors. A flat-type transmitting sensor that permits propagation of unfocused ultrasonic waves is used as the first ultrasonic sensor, and a flat-type receiving sensor that permits propagation of unfocused ultrasonic waves is used as the second ultrasonic sensor.

Ultrasonic measuring method and ultrasonic measuring system

An ultrasonic measuring method and an ultrasonic measuring system use or include at least one actual-measurement ultrasonic sensor set each consisting of a first ultrasonic sensor and a second ultrasonic sensor, for measuring the basis weight of an electrode paste, and a calibration ultrasonic sensor set consisting of a pair of first calibration ultrasonic sensor and second calibration ultrasonic sensor. The calibration ultrasonic sensor set performs calibration during measurement of the thickness of the electrode paste, and the actual-measurement ultrasonic sensor set calculates the basis weight of the electrode paste, using a measurement condition value obtained by the calibration ultrasonic sensor set.

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Toyota, Japan

Shinya Kuroki