Abstract: A noise suppression device includes: a DFT executor that expands a baseband signal into a discrete Fourier series X0(n), the baseband signal being generated by mixing an AM broadcast wave signal including a carrier wave of the angular frequency ?C with a complex sine wave of the same frequency; and an amplitude spectrum calculator that calculates an amplitude spectrum |X0(n)| from X0(n). The noise suppression device also includes: an asymmetric component detector that detects an asymmetric component in |X0(n)|; a suppressor that calculates a discrete Fourier series X1(n) by multiplying the value corresponding to the asymmetric frequency bin by a first factor and multiplying the other values by a second factor in X0(n); and an IDFT executor that performs inverse discrete Fourier transform on X1(n) to obtain a discrete-time signal.

Abstract: An electric storage device includes: an electrode assembly including a positive electrode plate and a negative electrode plate that are insulated from each other; a pair of current collectors each of which includes a connecting portion and is connected to a corresponding one of the positive electrode plate and the negative electrode plate at the connecting portion; a case that houses the electrode assembly and the pair of current collectors, the electrode assembly being supported by the pair of current collectors in the case; and a distance retaining member that retains a distance between portions more distal than the respective connecting portions of the pair of current collectors.

Abstract: An energy storage device includes a positive electrode terminal, a first electrode body and a second electrode body, and a positive electrode current collector electrically connecting the positive electrode terminal and the first and second electrode bodies. The positive electrode current collector includes a terminal connection portion electrically connected to the positive electrode terminal, inner electrode body connection portions connected to the first and second electrode bodies, and a coupling portion extending from an end of the terminal connection portion and coupling the terminal connection portion and the inner electrode body connection portions. The coupling portion has a substantially trapezoidal shape with a width at a connection end with the end of the terminal connection portion being larger than a width at a connection end with the inner electrode body connection portions.

Abstract: A noise suppression device includes: a DFT executor that expands a baseband signal into a discrete Fourier series X0(n), the baseband signal being generated by mixing an AM broadcast wave signal including a carrier wave of the angular frequency ?C with a complex sine wave of the same frequency; and an amplitude spectrum calculator that calculates an amplitude spectrum |X0(n)| from X0(n). The noise suppression device also includes: an asymmetric component detector that detects an asymmetric component in |X0(n)|; a suppressor that calculates a discrete Fourier series X1(n) by multiplying the value corresponding to the asymmetric frequency bin by a first factor and multiplying the other values by a second factor in X0(n); and an IDFT executor that performs inverse discrete Fourier transform on X1(n) to obtain a discrete-time signal.

Abstract: An energy storage device includes: an electrode terminal; an electrode assembly; a current collector configured to electrically connect the electrode terminal to the electrode assembly; and a container configured to store the electrode assembly and the current collector. The current collector includes a terminal connection part connected to the electrode terminal and an electrode assembly-connection part connected to the electrode assembly. The energy storage device further includes a spacer disposed lateral to the electrode assembly-connection part of the current collector. The spacer includes a restriction part configured to contact a part in a longitudinal direction of the electrode assembly-connection part of the current collector to restrict movement of the current collector in the longitudinal direction.

Abstract: A metal foil extending outward from electrode plates stacked in a layered manner is sandwiched between a first metal member provided with damping portions and a second metal member, and ultrasonic vibration is caused to act upon a plurality of sites of action from the first metal member side to join the metal foil to the first and second metal members. Each damping portion includes at least one of a cutaway portion formed by cutting away part of the first metal member, a thick-walled portion formed by partially increasing the plate thickness of the first metal member, and a convex ridge portion formed by bending part of the first metal member into a convex ridge shape.

Abstract: At least a connector of a current collecting member that is welded to an electrode plate of an electrode assembly is constituted by a rolled material, and the current collecting member and the electrode assembly are bonded to each other by vibration welding.

Abstract: An energy storage device includes a positive electrode terminal, a first electrode body and a second electrode body, and a positive electrode current collector electrically connecting the positive electrode terminal and the first and second electrode bodies. The positive electrode current collector includes a terminal connection portion electrically connected to the positive electrode terminal, inner electrode body connection portions connected to the first and second electrode bodies, and a coupling portion extending from an end of the terminal connection portion and coupling the terminal connection portion and the inner electrode body connection portions. The coupling portion has a substantially trapezoidal shape with a width at a connection end with the end of the terminal connection portion being larger than a width at a connection end with the inner electrode body connection portions.

Abstract: An energy storage device includes a positive electrode terminal, a first electrode body and a second electrode body, and a positive electrode current collector electrically connecting the positive electrode terminal and the first and second electrode bodies. The positive electrode current collector includes a terminal connection portion electrically connected to the positive electrode terminal, inner electrode body connection portions connected to the first and second electrode bodies, and a coupling portion extending from an end of the terminal connection portion and coupling the terminal connection portion and the inner electrode body connection portions. The coupling portion has a substantially trapezoidal shape with a width at a connection end with the end of the terminal connection portion being larger than a width at a connection end with the inner electrode body connection portions.

Abstract: Provided is an electric storage device capable of suitably preventing damage to end portions of an electrode assembly due to vibration. A current collector and a backing member are cooperated and connected to each end portion of the electrode assembly in which a positive electrode plate and a negative electrode plate are stacked in layers. The backing member is composed of a base and a skirt.

Abstract: Provided are an electric storage device in which a current collector is not easily broken even when vibration is applied, and a vehicle having this electric storage device. This electric storage device includes a case having a first inner surface and a second inner surface adjacent to the first inner surface, an electrode assembly housed in the case and including a positive electrode plate and a negative electrode plate insulated from each other, an electrode terminal disposed outside the case, and a current collector housed in the case and electrically connecting the electrode assembly and the electrode terminal to each other. A distal end edge of a distal end portion of the current collector is supported on the first inner surface of the case.

Abstract: A metal foil extending outward from an electrode plate is sandwiched between a first metal member and a second metal member, and ultrasonic vibration is caused to act upon a plurality of sites of action from the first metal member side to join the metal foil to the first metal member and the second metal member. The first metal member has a Vickers hardness of at least 40 Hv and not more than 75 Hv.

Abstract: An energy storage device includes a positive electrode terminal, a first electrode body and a second electrode body, and a positive electrode current collector electrically connecting the positive electrode terminal and the first and second electrode bodies. The positive electrode current collector includes a terminal connection portion electrically connected to the positive electrode terminal, inner electrode body connection portions connected to the first and second electrode bodies, and a coupling portion extending from an end of the terminal connection portion and coupling the terminal connection portion and the inner electrode body connection portions. The coupling portion has a substantially trapezoidal shape with a width at a connection end with the end of the terminal connection portion being larger than a width at a connection end with the inner electrode body connection portions.

Abstract: An electric storage device, including: an electrode assembly having at least one protrusion portion, the protrusion portion being formed of an end portion of any one of a positive electrode foil and a negative electrode foil and protruding in a laminated state from a side end of the other electrode foil of the both electrode foils; a current collector having a contact portion in contact with the protrusion portion; and a metal material that joins the protrusion portion by interposing the protrusion portion between the contact portion of the current collector and the metal material, wherein at least an end region in one direction along the opposing face is displaced in a direction away from the contact portion of the current collector than a central region of the opposing face is.

Abstract: At least a connector of a current collecting member that is welded to an electrode plate of an electrode assembly is constituted by a rolled material, and the current collecting member and the electrode assembly are bonded to each other by vibration welding.

Abstract: A metal foil extending outward from electrode plates stacked in a layered manner is sandwiched between a first metal member provided with damping portions and a second metal member, and ultrasonic vibration is caused to act upon a plurality of sites of action from the first metal member side to join the metal foil to the first and second metal members. Each damping portion includes at least one of a cutaway portion formed by cutting away part of the first metal member, a thick-walled portion formed by partially increasing the plate thickness of the first metal member, and a convex ridge portion formed by bending part of the first metal member into a convex ridge shape.

Abstract: An energy storage device includes: an electrode terminal; an electrode assembly; a current collector configured to electrically connect the electrode terminal to the electrode assembly; and a container configured to store the electrode assembly and the current collector. The current collector includes a terminal connection part connected to the electrode terminal and an electrode assembly-connection part connected to the electrode assembly. The energy storage device further includes a spacer disposed lateral to the electrode assembly-connection part of the current collector. The spacer includes a restriction part configured to contact a part in a longitudinal direction of the electrode assembly-connection part of the current collector to restrict movement of the current collector in the longitudinal direction.

Abstract: A metal foil extending outward from an electrode plate is sandwiched between a first metal member and a second metal member, and ultrasonic vibration is caused to act upon a plurality of sites of action from the first metal member side to join the metal foil to the first metal member and the second metal member. The first metal member has a Vickers hardness of at least 40 Hv and not more than 75 Hv.

Abstract: In an optical disk device, a technique for AC tilt correction with stability and following capability is provided in which, during an operation of a tracking servo mechanism, a lens shift amount obtained from a tracking control signal or a lens position error signal is measured for each of predetermined angles of rotation of an optical disk, and the measured values are averaged in a radial direction of the optical disk, and a tilt controller corrects an AC tilt based on the resulting average value.

Abstract: Provided is an electric storage device capable of suitably preventing damage to end portions of an electrode assembly due to vibration. A current collector and a backing member are cooperated and connected to each end portion of the electrode assembly in which a positive electrode plate and a negative electrode plate are stacked in layers. The backing member is composed of a base and a skirt.