Nissan Motor Company Limited

Yuuichi Hara

Takeshi Miyamoto

Tsuyoshi Morita

Noriko Hoshino

Etuso Oogami

Disclosed are abnormality detecting apparatus and method for a high-voltage circuit (A), in which: a square wave pulse is outputted to a measuring point (p) with a switch (SW) set off, the switch (SW) provided between an inverter circuit () and the ground, a difference voltage (Vp-p) between a voltage (Vh) detected at a phase of T/2 and a voltage (V) detected at a phase of T is obtained, the occurrence of a ground fault is detected based on the size of the difference voltage (Vp-p); and the square wave pulse is outputted to the measuring point (p) with the switch (SW) set on, and it is judged that a loosening of a fastening section (p) occurs when the difference voltage (Vp-p) exceeds a reference voltage (Vref).

Apparatus and method for detecting abnormality of high voltage circuit

A secondary battery has a positive electrode plate and a negative electrode plate enclosed within an internal space of a housing. Positive and negative electrode terminals are plate-shaped, are respectively connected to the positive and negative electrode plates and extend externally from the housing at two different portions of the outer edge thereof. The positive electrode terminal has a first part fixedly adjoined to a second part formed of conductive material(s) having a higher tensile strength than those of the first part. The second part is located outside of the internal space, and a first end of the first part extends into the internal space while its second end is fixedly adjoined to the second part. The secondary battery disclosed herein may possess improved longevity and resistance to electrode terminal vibration.

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Yokohama, Japan

Yuuichi Hara