Kabushiki Kaisha Toyota Jidoshokki

Eagle Industry Co., Ltd.

Mikiya Kurita

Ryuji Oide

Takayuki Hirose

Masato Ogasawara

Motoaki Okuda

Atsushi Minagata

Yoshihiro Ogawa

Yusuke Yamashita

Toshiaki Iwa

Masaki Takasan

Kazuo Seiki

Hiroyasu Nishihara

Hiroyuki Takei

Shinji Suzuki

Tomohiro Nakamura

Masami Tomioka

Makoto Mitsuyasu

Norimitsu Akiyoshi

Kitaru Iwata

Yohei Hamaguchi

Yasuaki Takenaka

Shinya Asai

Akihisa Matsudo

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 apparatus has a case accommodating an electrode assembly, and a release valve present in the wall of the case. The electrode assembly includes electrodes. A shielding member is arranged between the inner surface of the wall and the end surface of the electrode assembly. A point located in a center of the case in a front view of the case taken in the stacking direction of the electrodes and located in a center of a dimension of the electrode assembly in the stacking direction is a center point, and a region surrounded by a plane connecting the center point and a contour of the pressure release valve at a shortest distance is a three-dimensional region. The shielding member includes a shielding portion that entirely covers a cross section of the three-dimensional region along the end face of the electrode assembly.

Power storage apparatus

An electricity storage apparatusmay include: an electrode assemblyincluding a positive electrode and a negative electrode; a tabincluding one end which is electrically connected to the electrode assembly; and a conductive memberdisposed above the electrode assembly, and electrically connected to the tab. The tabmay include a first bent partprovided in a vicinity of the one end of the tab, a second bent partprovided in a vicinity of another end of the tab, and a joining partprovided between the first bent partand the second bent partand joined to the conductive member. The second bent partmay be bent so that the other end of the tabis disposed above the conductive member

Electricity storage apparatus

A current interruption device includes a conductive plate and a first deformable plate. The conductive plate includes a center portion and a peripheral portion surrounding the center portion. An upper surface of the center portion is formed in a planar shape spreading in a first direction and a second direction orthogonal thereto in a conductive state. The peripheral portion includes an inclined portion extending outward from a boundary between the center portion and the peripheral portion. An upper surface of the inclined portion is inclined so as to increase a distance to the first deformable plate as the upper surface of the inclined portion becomes farther away from the center portion when the conductive plate and the first deformable plate are viewed along the first direction or the second direction in the conductive state.

Current interruption device and electricity storage device including the same

A lid of a rechargeable battery includes a lid body that closes an opening of a case body and is supported by a case-side mating surface surrounding the opening of the case body. The lid also includes an inserted portion having a shape of a quadrangular column. The inserted portion protrudes from the lid body toward an inner part of the case body and extends along an inner circumferential surface of the case body. The lid also includes a rounded corner present in the distal end of the inserted portion in a protruding direction in which the inserted portion protrudes from the lid body. The lower limit of an edge-removal dimension of the corner is equal to an average particle diameter of a material for the lid.

A power storage device includes a case and a pressure release valve. The pressure release valve includes arcuate portions, intersecting grooves, and arcuate grooves that are connected to the ends of the intersecting grooves and extend along the arcuate portions. When imaginary straight lines extend along the intersecting grooves and intersect the circumferential edge of the pressure release valve, a first region, which is surrounded by the imaginary straight lines and the circumferential edge of the pressure release valve, and a second region, which is surrounded by the imaginary straight lines and the circumferential edge of the pressure release valve, are defined. The part of the first region that is in contact with the arcuate portions is larger than the part of the second region that is in contact with the arcuate portions. The area of the first region is greater than the area of the second region.

Power storage device having a pressure release valve

A vibration actuator includes a roller, a vibrating element having a contact portion that is in contact with the roller, a vibrator for vibrating the vibrating element, a pressing device for pressing the roller against the vibrating element, and a lubricator disposed close to the contact portion and in contact with the roller.

Vibration actuator

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Kariya, Japan

Mikiya Kurita