Sanyo Electric Co., Ltd.

Nao Kogami

Kazuhiro Harazuka

Hiroyuki Takahashi

Koji Fujinaga

A power supply device has end plates disposed at both ends of a battery block in which a plurality of battery cells and separator are stacked and connected by a binding bar. Separator includes heat insulating sheet including a fiber sheet and silica aerogel, and rubber-like elastic sheets stacked on a surface of heat insulating sheet. Furthermore, separator is provided with stacked region where rubber-like elastic sheets are stacked and non-stacked region where rubber-like elastic sheets are not stacked.

Power supply device and electric vehicle

A power supply device includes: battery block formed by stacking a plurality of battery cells in a thickness with separator interposed therebetween; a pair of end plates disposed on both end surfaces of battery block; and binding bar that is coupled to the pair of end plates and fixes battery block in a pressurized state via end plates. Separator is an elastomer, and both surfaces of plate-shaped part are formed into uneven layers having different amounts of change in thickness with respect to a pressing force.

Power supply device, electric vehicle comprising power supply device, and power storage device

A power supply device includes a battery block in which a plurality of battery cells is stacked in a thickness with separator clamped therebetween, a pair of end plates disposed on opposing end faces of the battery block, and a binding bar coupled to the pair of end plates and fixing the battery block in a compressed state via the end plates, in order to absorb expansion of the battery cells with the separator and suppress degradation of the separator in a state of being heated by the battery cells. Separator has a three-layer structure including viscoelastic elastic sheet that absorbs expansion of battery cell and heat-insulating sheets laminated on opposing surfaces of elastic sheet, and heat-insulating sheet is hybrid material of an inorganic powder and a fibrous reinforcing material.

Power supply device, and electric vehicle and power storage device that comprise said power supply device

A power supply device includes a battery block formed by stacking a plurality of battery cells in a thickness with separator interposed between corresponding battery cells, a pair of end plates disposed on respective end faces of the battery block, and a binding bar coupled to the pair of end plates to fix the battery block in a compressed state together with the end plates. Separator includes heat-insulating sheet and elastic layer layered on a surface of heat-insulating sheet, elastic layer having elastic protrusion that is partially in adhesion to a case surface of battery cell and is deformed by expansion of battery cell, and deformation space is provided for elastic protrusion pressed by battery cell to be displaced in an outer peripheral direction orthogonal to a pressing direction.

Growing community of inventors

Hyogo, Japan

Nao Kogami