Patent application number | Description | Published |
20150079432 | CURRENT INTERRUPTION DEVICE AND ELECTRIC STORAGE DEVICE USING SAME - A current interruption device includes: a deforming plate configured to deform when the internal pressure of the casing rises above the predetermined level; a conducting plate which configures the current path; and a contact plate. The conducting plate includes a first contact portion configured to contact the contact plate. The contact plate includes a second contact portion configured to contact the first contact portion. The deforming plate includes a pressure receiving portion configured to receive the internal pressure of the casing and a contacting portion configured to contact the first contact portion. The second contact portion is configured to be separated from the conducting plate by deformation causing the contacting portion to move toward the contact plate. The deforming plate is insulated from the conducting plate and the contact plate. The conducting plate is disposed to be interleaved between the deforming plate and the contact plate. | 03-19-2015 |
20150099154 | ELECTRIC STORAGE DEVICE AND RECHARGEABLE BATTERY - The electric storage device is provided with a case body and an electrode assembly accommodated in the case body. The electrode assembly includes positive and negative electrode sheets each having an active material layer. The case body includes at least one primary inner wall surface, at least one secondary inner wall surface, and corner surfaces. A plane that includes the boundary line between a primary inner wall surface and the corresponding corner surface and faces the corresponding secondary inner wall surface is defined as an imaginary boundary plane. An edge of the active material layer of a positive electrode sheet facing the corresponding secondary inner wall surface is positioned on the surface of the imaginary boundary plane, or is positioned in a region spaced further apart from the secondary inner wall surface facing the edge than the position of the imaginary boundary plane. | 04-09-2015 |
20150207124 | ELECTRIC STORAGE DEVICE - The electric storage device disclosed herein is a stacked type electric storage device. The electric storage device includes a separator insulating a first electrode from a second electrode. The electric storage device includes a first conductive path from a first electrode terminal to the first electrode, a second conductive path from a second electrode terminal to the second electrode, and a current interruption device disposed between the second electrode terminal and the second electrode, the current interruption device being configured to interrupt the second conductive path. The separator includes a first surface part covering the one surface of the first electrode, a second surface part covering the other surface of the first electrode, and a connection part connected to both the first and second surface parts. The connection part is disposed between the current interruption device and an end of the first electrode on a current interruption device side. | 07-23-2015 |
20150207132 | ELECTRIC STORAGE DEVICE INCLUDING CURRENT INTERRUPTION DEVICE - An electric storage device comprises the current interruption device which includes a deformable plate electrically connected to a first conductive member and a second conductive member to constitute part of a conductive path. The deformable plate deforms to interrupt the conductive path, when a pressure inside the casing rises. The first conductive member, the second conductive member, and the current interruption device are disposed between the terminal attachment wall and the electrode assembly. The first conductive member extends along the terminal attachment wall to connect the tab and the current interruption device. The second conductive member is connected to the current interruption device at a location that is farther from the terminal attachment wall than a connection between the first conductive member and the current interruption device, and extends along the terminal attachment wall to connect the current interruption device and the electrode terminal. | 07-23-2015 |
20150228939 | ELECTRICAL STORAGE DEVICE - An electrical storage device includes a case body having an opening, a lid, which closes the opening and has a through hole, an electrode assembly accommodated in the case body, and an electrode terminal. The electrode terminal has a base and a polar column portion, which projects from the base and shaped to pass from the inside of the case body through the through hole and protrude to the outside. A sealing member is sandwiched between the inner surface of the lid and a seat surface of the base. In a root portion of the polar column portion coupled to the base, in at least a part of the polar column portion around an axis thereof, a tapered portion, which spreads in the cross-sectional shape toward the base along the axis of the polar column portion, is provided. The sealing member is arranged radially outside of the tapered portion. | 08-13-2015 |
20150243935 | ELECTRICAL STORAGE DEVICE - An electrical storage device includes a case, an electrode assembly accommodated in the case, an electrode terminal, a terminal insulating member, and an annular sealing member. The electrode terminal has a base located inside the case and a polar column portion, which projects from the base. An inner surface of the case at the circumference of the through hole and/or a tip end of the terminal insulating member on the side corresponding to the base has a tapered portion. A cross-sectional shape of the tapered portion in a direction in which the base and the inner surface face of the case each other is inclined to the outside in the radial direction of the through hole from the side corresponding to the base toward the through hole. | 08-27-2015 |
20150280191 | POWER STORAGE DEVICE - 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. | 10-01-2015 |
20150318526 | ELECTRICITY STORAGE DEVICE - An electricity storage device includes an electrode assembly, a case, a safety valve, and a cover member. The case accommodates the electrode assembly. The safety valve is arranged in the case and opens to discharge gas out of the case when an inner pressure of the case exceeds a release pressure. The cover member is arranged in the case opposing the safety valve and includes a flow passage for the gas. | 11-05-2015 |