Panasonic Intellectual Property Management Co., Ltd.

Gs Yuasa International Ltd.

Misaki Harada

Kazuhiro Sugie

Yu Kojima

Kazuhiko Shimoda

Yuki Nakanishi

Kenji Izumi

Etsuko Ogasawara

Kazunari Ando

In a lead-acid battery including an electrode plate group housed in a cell chamberwith an electrolyte, each positive electrode plate includes a positive electrode grid made of lead or a lead alloy containing no antimony, and a positive electrode active material with which the positive electrode grid is filled. Each negative electrode plate includes a negative electrode grid made of lead or a lead alloy containing no antimony, a surface layer formed on a surface of the negative electrode grid and made of a lead alloy containing antimony, and a negative electrode active material with which the negative electrode grid is filled. A mass ratio M/Mfalls within a range of 0.70 to 1.10, where Mrepresents the mass of the positive electrode active material per cell chamber, and Mrepresents the mass of the negative electrode active material per cell chamber.

Lead-acid battery

Growing community of inventors

Aichi, Japan

Misaki Harada