Sanyo Electric Co., Ltd.

Go Yamashiro

Shingo Ochi

Hiroyuki Takahashi

Kazuhiro Harazuka

Power supply device includes a plurality of secondary battery cells each including an outer covering can having a quadrangular shape, a plurality of separators interposed between the plurality of secondary battery cells, a pair of end plates covering both side end faces of battery stack in which the plurality of secondary battery cells are stacked with the plurality of separators interposed between the plurality of secondary battery cells, and a plurality of fastening members each having a plate shape extending in a stacking direction of the plurality of secondary battery cells, and disposed on opposing side surfaces of battery stack to fasten the pair of end plates to each other. Separator has a spring constant of less than or equal to 500 kN/mm.

Power supply device, electric vehicle using same, and power storage device

The power supply device includes: a plurality of secondary battery cells each including a prismatic exterior can; a pair of end plates covering both end surfaces of a battery stack body in which the plurality of secondary battery cells are stacked; and a plurality of fastening members made of metal each having a plate shape extending in a stack direction of the plurality of secondary battery cells and disposed on an opposing side surface of the battery stack body to fasten the end plates to each other, in which each of the plurality of fastening members includes fastening part fixed to the end plate at each of both ends in a longer direction, and intermediate part coupling fastening parts with each other, and fastening parts is higher in strength than intermediate part, and intermediate part is higher in stretchability than fastening parts.

Power supply device, electric vehicle and power storage device using same, fastening member for power supply device, method of manufacturing power supply device, and method of manufacturing fastening member for power supply device

The battery module includes a plurality of batteries stacked together, and separator disposed between an adjoining two of the plurality of batteries and configured to insulate between the adjoining two of batteries. Separator includes thermal conduction suppressor and position regulator. Thermal conduction suppressor has lower thermal conductivity than position regulator and suppresses thermal conduction between the adjoining two of batteries. Position regulator has higher rigidity than thermal conduction suppressor, has dimension in stacked direction of batteries equal to or greater than dimension of thermal conduction suppressor in stacked direction, and abuts the adjoining two of batteries to regulate a position of each of the adjoining two of batteries in stacked direction.

Battery module

A power supply device includes a plurality of battery cells each having a prismatic exterior can, heat-shrinkable films having insulating property and each covering one of the plurality of battery cells, a plurality of separators interposed between the plurality of battery cells, a battery stack constituted by the plurality of battery cells stacked with separators interposed between the plurality of battery cells, a pair of end plates disposed on both end faces of the battery stack, and a plurality of bind bars disposed on side surfaces, facing opposite directions, of the battery stack to fasten the end plates to each other, where an edge of an end edge of each separator is broken.

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

The power supply device includes: a plurality of secondary battery cells each including a prismatic exterior can; a pair of end plates covering both end surfaces of a battery stack body in which the plurality of secondary battery cells are stacked; and a plurality of fastening members made of metal each having a plate shape extending in a stack direction of the plurality of secondary battery cells and disposed on an opposing side surface of the battery stack body to fasten the end plates to each other, in which each of the plurality of fastening members includes fastening portion fixed to the end plate at each of both ends in a longer direction, and intermediate portion coupling fastening portions with each other, and fastening portions is higher in strength than intermediate portion, and intermediate portion is higher in stretchability than fastening portions.

Power supply device and electric vehicle and power storage device using same, fastening member for power supply device, production method for power supply device, and production method for fastening member for power supply device

A power supply device includes a battery stack body including a plurality of secondary battery cells are stacked, a pair of end plates covering both end surfaces of the battery stack body, and a plurality of fastening members each disposed on an opposing side surface of the battery stack body to fasten the end plates to each other. Fastening member includes end-part fastening parts fixed to the end plates at both ends in a longer direction, and intermediate coupling part coupling end-part fastening parts to each other, and intermediate coupling part has a plate shape extending along a side surface of the battery stack body, and includes a plurality of rows of coupling bars formed in a wave shape in front view of fastening member. At the time of expansion of the secondary battery cells, the power supply device elastically deforms coupling bar in a plane along the side surface of the battery stack body so that intermediate coupling part stretches in the stack direction of the secondary battery cells.

Power supply device, electric vehicle and power storage device provided with said power supply device, and fastening member for power supply device

A power supply device includes a battery stack body in which a plurality of secondary battery cells are stacked, a pair of end plates covering both end surfaces of the battery stack body, and a plurality of fastening members disposed on the side surface of the battery stack body and fasten the end plates to each other. Fastening member includes plate-shaped bar extended in a stack direction of the secondary battery cells, and locking blocks fixed to both ends of plate-shaped bar. Locking block is formed to be thicker than plate-shaped bar, is joined to an end surface of plate-shaped bar, and protrudes toward an outer peripheral surface of the end plate. The end plate is provided with a stopper portion abutting on locking block on a part close to the battery stack body of a fitting portion to which locking block is guided, and locking block is locked to the stopper portion to fasten the end plate with fastening member.

Power supply device, electric vehicle and power storage device including power supply device, and method of manufacturing power supply device

Power supply device includes: a plurality of secondary battery cells each having a prismatic exterior can and constant cell thickness; a pair of end plates covering both end surfaces of battery stack body in which the plurality of secondary battery cells are stacked; and a plurality of fastening members each having a plate shape extending in a stack direction of the plurality of secondary battery cells and disposed on an opposing side surface of battery stack body to fasten end plates to each other. Each of the plurality of fastening members has wavy portion in which a plurality of wavy pieces bent in a cross-sectional view are periodically disposed at an interval according to the cell thickness.

Power source device, and electric vehicle and electricity storage device employing same

Power supply device includes: a plurality of secondary battery cells each constituted by closing an open end of quadrangular exterior can opened at one end, with sealing plate; insulating separator interposed between adjacent secondary battery cells; one pair of end plates covering both end faces of battery stack constituted by stacking the plurality of secondary battery cells; and a plurality of fastening members fastening end plates together. Power supply device is configured such that within a region where separator is in contact with secondary battery cell, separator is made less easily deformable in a region on the side of sealing plate than other regions. As a result, a portion of separator in contact with the side of sealing plate is made not to easily deform, and therefore, when secondary battery cell expands, a joint portion between sealing plate and exterior can is protected, and meanwhile, exterior can is allowed to deform at other portions, and thereby, the deformation during expansion can be mitigated.

Power supply device and vehicle equipped therewith

Power supply device includes a plurality of secondary battery cells, a pair of end plates that cover both end faces of battery stack in which the plurality of secondary battery cells are stacked, a plurality of fastening members that fasten end plates to each other, a plurality of pressing parts that press upper surfaces of the plurality of secondary battery cells respectively, and buffer interposed between pressing parts and the upper surfaces of secondary battery cells. Buffer includes a plurality of covers made of resin, and a connecting part, having flexibility, for connecting two of the plurality of covers. Buffer is configured such that each of the plurality of covers is disposed on the upper surface of corresponding one of secondary battery cells, and each of pressing part abuts on the upper surface of the corresponding cover.

Growing community of inventors

Hyogo, Japan

Go Yamashiro