Nissan Motor Company Limited

Hitachi Automotive Systems, Ltd.

Nayuta Yamachi

Hiroshi Hoshi

Chikara Kikkawa

Shigeyuki Kiyota

Toyoki Iguchi

Toshiyuki Yoshida

Akira Kotaki

Takeshi Haga

Hiroshi Iwata

Yoshiyuki Tanaka

Hiroaki Saitou

Hiroaki Hashimoto

Tsunemi Aiba

Masayoshi Saeki

Takashi Kobune

Takashi Hasegawa

Eisuke Sengoku

Toshikazu Maeshima

Kouji Kato

Shinichi Ishikuro

Fumihiro Kojima

A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. The cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel. A minimum temperature sensor is disposed in the upstream position to measure a lowest temperature region in a first cell module. A maximum temperature sensor is disposed in the downstream position which becomes a highest temperature region in the first cell module. Another temperature sensor is disposed in a second cell module to measure the temperature of either the highest temperature or the lowest temperature in the second cell module.

Battery pack cooling system

A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. A first temperature sensor is a minimum temperature sensor disposed in the upstream position which becomes a lowest temperature. A second temperature sensor is a maximum temperature sensor disposed in the downstream position which becomes a highest temperature. A third temperature sensor is configured to measure the temperature of either the highest temperature or the lowest temperature disposed in a second cell module. A cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel.

An electricity storage device including: plural electricity storage modules, each including an electricity storage module case, plural electricity storage cells housed in the electricity storage module case, and external terminals; an electricity storage case in which the plurality of electricity storage modules are arranged and housed; plural wire harnesses connected to the external terminals of the electricity storage modules; and a vibration damping material provided in a space region between one surface of the electricity storage case and, among the plurality of wire harnesses, at least a wire harness including the longest length extending in an arrangement direction of the electricity storage modules, wherein the wire harness including the longest length extending in the arrangement direction of the electricity storage modules is biased toward a side of the electricity storage module case by the one surface of the electricity storage case, through the vibration damping material.

Electricity storage device

The purpose of the present invention is to provide a battery block capable of reducing stress acting on a connection portion due to thermal expansion/contraction or size error. A battery block () according to the present invention includes: a plurality of conductive members () arranged along side surfaces () of a holding case () and electrically connecting corresponding battery cells (); voltage detection boards () disposed opposite the side surfaces () of the holding case () and detecting the voltage of the battery cells (); and a plurality of voltage detection terminals () respectively electrically connected to a plurality of conductive members () disposed on the voltage detection boards (). In the voltage detection terminals (), a securing portion () secured to the voltage detection boards () and a connection portion () connected to the conductive members () are disposed along an arranged direction, with a bend portion () which is elastically deformable in at least the arranged direction disposed between the securing portion () and the connection portion ().

Battery block and secondary battery module

Battery module

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Hitachinaka, Japan

Nayuta Yamachi