Nissan Motor Company Limited

Yasuo Ohta

Hideaki Horie

Kenji Hosaka

Masanori Aoyagi

Kenji Ohara

Sohei Suga

Masanobu Sato

Takaaki Abe

Satoru Ichikawa

Hiroshi Miyakubo

Motoharu Obika

Kazuyuki Sakamoto

Kosuke Hagiyama

Tomoya Kubota

Junji Katamura

Shigeo Watanabe

A bipolar electrode is composed of a first active material layer which is, for example, a positive electrode active material layer formed to include a first active material on one side of a collector, and a second active material layer which is, for example, a negative electrode active material layer formed to include a second active material with less compressive strength than that of the first active material on the other side of the collector. Then, a density adjusting additive which is an additive material with larger compressive strength than that of the second active material is included in the second active material layer.

Bipolar electrode, bipolar secondary battery using the same and method for manufacturing bipolar electrode

A negative electrode for a secondary battery according to the present invention has a collector and a negative electrode active material layer formed on a surface of the collector and containing negative electrode active material particles. In the negative electrode active material layer, an insulating material is arranged between the negative electrode active material particles so as not to develop conductivity by a percolation path throughout the negative electrode active material layer. It is possible in this configuration to effectively prevent the occurrence of a short-circuit current due to an internal short circuit and the generation of heat due to such short-circuit current flow in the secondary battery while securing the battery performance of the secondary battery.

Negative electrode for secondary battery, and process for production thereof

A bipolar secondary battery is provided with an electric power generating unit, a pair of terminal plates. The electric power generating unit includes a plurality of bipolar electrodes stacked on one another with an electrolyte layer disposed between the bipolar electrodes and separating the bipolar electrodes. Each of the bipolar electrodes includes a collector with a positive electrode active material layer formed on a first side surface of the collector, and a negative electrode active material layer formed on a second side surface of the collector. The first terminal plate is connected to a first stacking direction facing end of the electric power generating unit. The second terminal plate is connected to a second stacking direction facing end of the electric power generating unit. At least one of the terminal plates includes an electric current suppressing device that suppresses an electric current occurring when an internal short circuit occurs in the electric power generating unit.

Bipolar second battery with terminal plate including current suppressing device, battery pack and vehicle equipped with the same

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Yokohama, Japan

Yasuo Ohta