Abstract
The Japanese Patent Applications filed on the topic of nickel/metal hydride (Ni/MH) batteries have been reviewed. Patent applications filed by the top nine battery manufacturers (Matsushita, Sanyo, Hitachi Maxell, Yuasa, Toshiba, FDK, Furukawa, Japan Storage, and Shin-kobe), five component suppliers (Tanaka, Mitsui, Santoku, Japan Metals & Chemicals Co. (JMC), and Shin-Etsu), and three research institutes (Industrial Research Institute (ISI), Agency of Industrial Science and Technology (AIST), and Toyota R & D) were chosen as the main subjects for this review, based on their production volume and contribution to the field. By reviewing these patent applications, we can have a clear picture of the technology development in the Japanese battery industry. These patent applications also provide insights, know-how, and future directions for engineers and scientists working in the rechargeable battery field.
Highlights
Since the debut of commercial nickel/metal hydride (Ni/MH) batteries in the late 1980’s, over one thousand Japanese Patents have been granted
The Ni/MH battery market aims to maintain a smooth growth into the future (Figure 1), especially in the hybrid electric vehicle (HEV) and stationary markets
Matsushita acquired in the area of Ni/MH batteries: an AB5 metal hydride (MH) alloy containing alloyAwith cycle life [8], a negative of 1998 high surface area with carbon content fewimproved patent applications filed betweenelectrode
Summary
Since the debut of commercial nickel/metal hydride (Ni/MH) batteries in the late 1980’s, over one thousand Japanese Patents have been granted. The Ni/MH battery market aims to maintain a smooth growth into the future (Figure 1), especially in the hybrid electric vehicle (HEV) and stationary markets. Research Institute (Tokyo, Japan) that the use of Ni/MH in HEVs will increase four-fold from 2014 to 2020 [1] (Figure 2). In order to facilitate the research and development world outside Japan, a review of the Japanese Patent Applications on the subject of Ni/MH batteries is presented here. Is increasing, uses in other areas remain stable. Ininhybrid electric vehicle hybrid electric vehicle (HEV) is increasing, uses in other areas remain stable. Data from Yano’s Report [1]
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