Other

Fdk Corporation

Fdk Twicell Co., Ltd.

Tetsuya Yamane

Katsumi Hisano

Hideo Iwasaki

Kei Matsuoka

Tsutomu Matsui

Masaaki Takei

Takeshi Ito

Masaru Kihara

Yuzo Imoto

Masaru Takasu

A nickel hydrogen rechargeable battery has a positive electrode and a negative electrode. The positive electrode includes positive-electrode active material made of nickel hydroxide particles in which magnesium is dissolved, and the negative electrode includes rare earth-Mg&#x2014;Ni-based hydrogen storage alloy powder. At least either one of the negative and positive electrodes includes as additive at least one selected from a group including zinc and zinc compounds. The content of the additive ranges from 0.2 to 1.5 part by weight per 100 parts by weight of hydrogen storage alloy in the negative electrode, and ranges from 0.3 to 1.5 part by weight per 100 parts by weight of positive-electrode active material in the positive electrode.

Nickel hydrogen rechargeable battery

A nickel hydrogen rechargeable battery contains an electrode group made up of positive and negative electrode put together with a separator intervening therebetween. The positive electrode includes positive-electrode active material particles each having a base particle composed mainly of nickel hydroxide and a conductive layer that covers the surface of the base particle and is made from a Co compound containing Li. The negative electrode includes a rare earth-Mg&#x2014;Ni-based hydrogen storage alloy containing a rare-earth element, Mg and Ni. The total amount of Li contained in the battery is in a range of from 15 to 50 (mg/Ah) on the condition that the Li is converted into LiOH, and that the total amount of Li is found as a mass per Ah of positive electrode capacity.

Nickel hydrogen rechargeable battery with rare earth-Mg-Ni based hydrogen storage

A battery device designed so that a plurality of battery modules ( ) are arranged in rows at given spaces in a enclosure ( ). Turbulence accelerators ( ), such as dummy battery units or the like, are provided in a position on the uppermost-stream side of the enclosure in which air flows in the direction of arrangement of the battery modules. The heat transfer ability for the battery modules in the upper-stream position is enhanced by the turbulence accelerators which disorders the airflow introduced into the enclosure. Auxiliary coolant intake ports ( ) for the introduction of a coolant are provided in the middle of an airflow path, whereby the heat transfer ability on the lower-stream side is enhanced, so that battery temperature differences between the battery units arranged in the enclosure can be restrained. Thus, a simple-construction battery device is realized enjoying improved quality and operation stability.

Battery device

Battery device having a turbulence accelerator for disordering a coolant flow

Growing community of inventors

Takasaki, Japan

Tetsuya Yamane