Kabushiki Kaisha Toyota Jidoshokki

Toyota Jidosha Kabushiki Kaisha

Yohei Hamaguchi

Motoaki Okuda

Atsushi Minagata

Motoyoshi Okumura

Takayuki Hirose

Nobuyasu Haga

Kyoichi Kinoshita

Tomohiro Nakamura

Mikiya Kurita

Masato Ogasawara

Yasuaki Takenaka

Hidaka Yamada

Yusuke Yamaguchi

Kyohei Oda

A power storage module comprises: an electrode stacked body including a stacked body in which a plurality of bipolar electrodes are stacked, a pair of terminal electrodes located on an outer side of the stacked body in a stacking direction of the bipolar electrodes, and a plurality of metal plates which constitute the stacked body and the pair of terminal electrodes; and a sealing body provided to surround a side surface of the electrode stacked body. The sealing body includes a plurality of first sealing portions coupled to edge portions of the plurality of metal plates, and a second sealing portion that couples the first sealing portions to each other. A thickness adjustment member that adjusts the thickness of the electrode stacked body in the stacking direction is disposed in the electrode stacked body at a position of overlapping the first sealing portions when viewed from the stacking direction.

Power storage module, and manufacturing method therefor

A secondary battery is provided with first and second electrode assembly bodies and first and second negative electrode tab groups. The first and second negative electrode tab groups respectively have collected foil portions each constituted by a plurality of collected tab portions and extension portions. The extension portions of the respective tab groups have portions-to-be-welded and step portions. In the step portions, the plurality of tabs are laminated in a state that the end portions thereof are shifted in a step-like manner. The secondary battery is provided with an overlapped portion where the step portions of the first negative electrode tab group and the second negative electrode tab group are overlapped with each other in the lamination direction of the negative electrode tabs.

Power storage device

A power storage device manufacturing method that seals a case housing an electrode assembly of a power storage device and injects an electrolyte into the case after sealing, the method includes a step accompanied by a pressure operation of increasing or reducing a pressure inside the case after sealing the case, and a process performed in a state of turning the inside of the case to the pressure higher or lower than an atmospheric pressure, and an internal space capacity of the case is measured based on a change with time of the pressure inside the case caused by the pressure operation inside the case.

Power storage device manufacturing method, manufacturing device, liquid injection device, and liquid injection method

This electricity storage device comprises an electrode assembly, a case, an electrode terminal and a conductive member. The electrode assembly comprises a positive electrode, a negative electrode and a separator. The separator comprises a first separator part and a second separator part. The separator has a container part that contains portions of the positive electrode other than a tab. The separator has a welded part and a tab facing part. The welded part has facing parts that are positioned on both sides of the tab facing part. The facing parts face the electrode terminal with the conductive member being interposed therebetween. The facing parts are larger in shrinkage amount associated with thermal welding than the other portions of the welded part.

Electricity storage device

A positive collector and a negative collector are arranged such that connecting surfaces of the positive collector and the negative collector that are connected to collection groups face an electrode assembly. An insulator is arranged in a case between the positive and negative collectors and a terminal wall of the case. The insulator separates an opposing surface from the terminal wall. This reduces useless space and insulates the collectors and the power collection groups from the case.

Growing community of inventors

Kariya, Japan

Yohei Hamaguchi