Abstract
Patent applications in the field of nickel/metal hydride (Ni/MH) batteries are reviewed to provide a solid technology background and directions for future developments. As the fourth review article in the series of investigations into intellectual properties in this area, this article focuses on 126 patent applications filed by European companies at the European Patent Office, while the earlier articles dealt with those from USA, Japan, and China. The history and current status of the key companies in the Ni/MH battery business are briefly discussed. These companies are categorized by their main roles in the industry, i.e., battery manufacturer, metal hydride alloy supplier, separator supplier, and others. While some European companies are pioneers in bringing the Ni/MH product to customers, others have made significant contributions to the development of the technology, especially in the button cell, bipolar cell, and separator areas.
Highlights
Nickel/metal hydride (Ni/MH) batteries are widely used in consumer electronics, stationary energy storage, and hybrid electric vehicles (HEV)
We have reviewed the nickel/metal hydride (Ni/MH)-related patents filed in the USA [6], Japan [7], and China [8]
We focus on patent applications to the European Patent Office submitted by European companies; these applicants are grouped as battery manufacturers, metal hydride (MH) alloy suppliers, separator suppliers, and others
Summary
Nickel/metal hydride (Ni/MH) batteries are widely used in consumer electronics, stationary energy storage, and hybrid electric vehicles (HEV). France batteries and submitted patent applications related fields over the past http://www.freudenberg. European battery/chemical companies related to the fabrication of Technology, France) made batteries for cell over phones active inIn filing batteries and submitted patent applications in related fields the and past was two decades. 2013,to sold its Small batteries and submitted patent applications in related fields the past. France), manufactured consumer-type batteries and submitted patent applications in related fields over the past two decades. In 2002, Varta submitted by European companies; these applicants are grouped as battery manufacturers, metal hydride (MH) alloy suppliers, separator suppliers, and others. ThereTrademark are two large EuropeanWebsite companies, Varta (Ellwangen, Germany) and SAFT (Bagnolet, France), that manufactured consumer-type Ni/MH batteries and submitted patent applications in related fields over the past two decades. Hoppecke (Brilon-Hoppecke, Germany) made prismatic flooded-type Ni/MH batteries http://www.vartafor transportation applications
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