Abstract: A vehicle includes a vehicle drive power storage device including a power battery pack and a first capacity battery pack and a second capacity battery pack that has at least a smaller capacity than the first capacity battery pack and supplies electric power to the power battery pack. The power battery pack and the capacity battery packs are coupled in parallel. The capacity battery packs have a higher capacity and lower power than the power battery pack. The vehicle further includes a switch mechanism, a control device, and a load. The control device: preferentially supplies electric power from the power battery pack to the load when the vehicle accelerates; and, when a velocity of the vehicle is constant, supplies electric power from the second capacity battery pack to the power battery pack, concurrently with supplying electric power from the first capacity battery pack to the load.

Abstract: A fiber-reinforced resin bonded structure includes a first member, a second member, and an adhesive layer that bonds the first member and the second member. One or both of the first member and the second member are made of a fiber-reinforced resin composite. The adhesive layer includes at least one first region having a relatively large layer thickness and a second region having a relatively small layer thickness. The at least one first region of the adhesive layer includes a spacer in contact with the first member and the second member.

Abstract: A fiber-reinforced resin composite material has a longitudinal direction, and includes a first stack, a second stack, a ridge, a flat surface, and a connection. The ridge extends in the longitudinal direction. The flat surface is continuous to the ridge. The connection is where the first and second stacks are coupled. The first and second stacks are joined to each other in a direction intersecting the longitudinal direction. Fibers of at least one of first fiber-reinforced resin sheets included in the first stack, fibers of at least one of second fiber-reinforced resin sheets included in the second stack, or both intersect the ridge. The connection includes the first and second fiber-reinforced resin sheets that are overlapped alternately, and includes ends of the first fiber-reinforced resin sheets, ends of the second fiber-reinforced resin sheets, or both that are shifted from each other to allow the connection to have a gradually-varied thickness.

Abstract: A fiber-reinforced resin composite configured to be to be used for a vehicle body structure has a cylindrical shape and a longitudinal direction. The fiber-reinforced resin composite includes first fibers and second fibers. The first fibers are disposed along an axial direction of the cylindrical shape. The second fibers are wound over an entire circumferential surface along a direction intersecting the axial direction of the cylindrical shape. The number of the first fibers per unit area in a tensile surface that is to mainly receive tensile stress upon a collision of a vehicle body is larger than the number of the first fibers per unit area in a compressive surface that is to mainly receive compressive stress upon the collision of the vehicle body.

Abstract: A fiber-reinforced resin structure body includes a first member and a second member. The first member is made of a fiber-reinforced resin; and the second member is made of a fiber-reinforced resin and forming a closed space by being joined to the first member. One or both of the first member and the second member includes a side wall having two side surfaces located on both sides in a direction of a load loaded on a swing end of the fiber-reinforced resin structure body. A joint joining the first member and the second member together is provided more on an inside than an outer wall surface located on an opposite side to the closed space out of the two side surfaces is.

Abstract: A fiber-reinforced resin composite configured to be to be used for a vehicle body structure has a cylindrical shape and a longitudinal direction. The fiber-reinforced resin composite includes first fibers and second fibers. The first fibers are disposed along an axial direction of the cylindrical shape. The second fibers are wound over an entire circumferential surface along a direction intersecting the axial direction of the cylindrical shape. The number of the first fibers per unit area in a tensile surface that is to mainly receive tensile stress upon a collision of a vehicle body is larger than the number of the first fibers per unit area in a compressive surface that is to mainly receive compressive stress upon the collision of the vehicle body.

Abstract: A fiber-reinforced resin composite material has a longitudinal direction, and includes a first stack, a second stack, a ridge, a flat surface, and a connection. The ridge extends in the longitudinal direction. The flat surface is continuous to the ridge. The connection is where the first and second stacks are coupled. The first and second stacks are joined to each other in a direction intersecting the longitudinal direction. Fibers of at least one of first fiber-reinforced resin sheets included in the first stack, fibers of at least one of second fiber-reinforced resin sheets included in the second stack, or both intersect the ridge. The connection includes the first and second fiber-reinforced resin sheets that are overlapped alternately, and includes ends of the first fiber-reinforced resin sheets, ends of the second fiber-reinforced resin sheets, or both that are shifted from each other to allow the connection to have a gradually-varied thickness.

Abstract: A composite material structural member including a core member, composite material members, and at least one composite material sheet. The members are disposed around the core member and are adhered to each other to form a hollow space. The composite material sheet is disposed between the core member and the members so as to overlap the bonded portion between the members. The composite material sheet forms a hollow composited structure together with the members.

Abstract: A fiber-reinforced resin structure body includes a first member and a second member. The first member is made of a fiber-reinforced resin; and the second member is made of a fiber-reinforced resin and forming a closed space by being joined to the first member. One or both of the first member and the second member includes a side wall having two side surfaces located on both sides in a direction of a load loaded on a swing end of the fiber-reinforced resin structure body. A joint joining the first member and the second member together is provided more on an inside than an outer wall surface located on an opposite side to the closed space out of the two side surfaces is.

Abstract: An impact absorber includes an energy absorbing member that is formed of a composite material and absorbs impact energy by crushing in a predetermined crush direction, an outer tube member surrounding the periphery of the energy absorbing member over the energy absorbing member along the crush direction to prevent foreign objects from entering or impacting the energy absorbing member, and a pressing member in contact with the front end of the energy absorbing member and the front end of the outer tube member to press the energy absorbing member and the outer tube member simultaneously in the crush direction to thereby crush them. The outer tube member formed in a shape in which tubular portions are coupled in the crush direction, and is crushed in the crush direction while the tubular portions are regularly folded when the outer tube member is pressed by the pressing member in the crush direction.

Abstract: A composite material structural member including a core member, composite material members, and at least one composite material sheet. The members are disposed around the core member and are adhered to each other to form a hollow space. The composite material sheet is disposed between the core member and the members so as to overlap the bonded portion between the members. The composite material sheet forms a hollow composited structure together with the members.

Abstract: An impact energy absorption structure for a vehicle has a structure in which an impact absorption member is disposed between an outer panel and inner panel. The impact absorption member is formed of ribs in a grid pattern. Specifically, first ribs each having a major surface facing in a front-rear direction are disposed approximately at regular intervals in the front-rear direction. In addition, second ribs each having a major surface facing in a vertical direction are disposed approximately at regular intervals in the vertical direction. The first ribs disposed at ends in the front-rear direction are closer to the outer panel than the first ribs disposed at a middle portion in the front-rear direction.

Abstract: An impact absorber includes a energy absorbing member that is formed of a composite material obtained by reinforcing a resin with a fiber and absorbs impact energy by being crushed in a predetermined crush direction, and a pressing member that is disposed on the front side of the energy absorbing member and presses it in the crush direction to thereby crush the energy absorbing member. The energy absorbing member is configured by stacking, along a radial direction orthogonal to the crush direction, fiber layers having different elastic moduli to a load along the crush direction, and the front end portion of the energy absorbing member is inclined relative to a pressing surface of the pressing member such that the fiber layers are gradually brought into contact with the pressing member sequentially in ascending order of the elastic modulus as the energy absorbing member is pressed by the pressing member.

Abstract: An impact energy absorption structure for a vehicle has a structure in which an impact absorption member is disposed between an outer panel and inner panel. The impact absorption member is formed of ribs in a grid pattern. Specifically, first ribs each having a major surface facing in a front-rear direction are disposed approximately at regular intervals in the front-rear direction. In addition, second ribs each having a major surface facing in a vertical direction are disposed approximately at regular intervals in the vertical direction. The first ribs disposed at ends in the front-rear direction are closer to the outer panel than the first ribs disposed at a middle portion in the front-rear direction.

Abstract: A collision detection apparatus includes: an energy absorption member that possesses conductivity and absorbs impact energy by being crushed in a front-rear direction; two contact members that possess conductivity and are respectively disposed in contact with front and rear end surfaces of the energy absorption member in order to press and crush the energy absorption member in the front-rear direction; a electric resistance detector that is electrically connected to both of the two contact members in order to detect variation in an electric resistance value accompanying crushing of the energy absorption member; and a displacement calculator that calculates a displacement amount of the energy absorption member in the front-rear direction on the basis of the variation in the electric resistance value detected by the electric resistance detector.

Abstract: An impact absorber includes a an energy absorbing member that is formed of a composite material and absorbs impact energy by being crushed in a predetermined crush direction, an outer tube member disposed so as to surround the periphery of the energy absorbing member over the energy absorbing member along the crush direction, and a pressing member disposed so as to be in contact with the front end of the energy absorbing member and the front end of the outer tube member and presses the energy absorbing member and the outer tube member simultaneously in the crush direction to thereby crush them. The outer tube member is formed in a shape in which tubular portions are coupled in the crush direction, and is crushed in the crush direction while the tubular portions are regularly folded when the outer tube member is pressed by the pressing member in the crush direction.

Abstract: An impact absorber includes a energy absorbing member that is formed of a composite material obtained by reinforcing a resin with a fiber and absorbs impact energy by being crushed in a predetermined crush direction, and a pressing member that is disposed on the front side of the energy absorbing member and presses it in the crush direction to thereby crush the energy absorbing member. The energy absorbing member is configured by stacking, along a radial direction orthogonal to the crush direction, fiber layers having different elastic moduli to a load along the crush direction, and the front end portion of the energy absorbing member is inclined relative to a pressing surface of the pressing member such that the fiber layers are gradually brought into contact with the pressing member sequentially in ascending order of the elastic modulus as the energy absorbing member is pressed by the pressing member.

Abstract: A collision detection apparatus includes: an energy absorption member that possesses conductivity and absorbs impact energy by being crushed in a front-rear direction; two contact members that possess conductivity and are respectively disposed in contact with front and rear end surfaces of the energy absorption member in order to press and crush the energy absorption member in the front-rear direction; a electric resistance detector that is electrically connected to both of the two contact members in order to detect variation in an electric resistance value accompanying crushing of the energy absorption member; and a displacement calculator that calculates a displacement amount of the energy absorption member in the front-rear direction on the basis of the variation in the electric resistance value detected by the electric resistance detector.

Abstract: There is provided a positive electrode active material production method, a positive electrode, and a storage device. A production method of a positive electrode active material having a LiVPO4F-type crystal structure and containing carbon, includes: a step of synthesizing a precursor that has VPO4 containing carbon, from a starting material in the form of vanadium pentoxide and a phosphate compound, and from a carbon material as an additive; and a step of synthesizing LiVPO4F containing carbon, from the precursor and LiF. The carbon material as an additive is conductive carbon black having a specific surface area of 700 to 1500 m2/g, and in the step of synthesizing the precursor, an addition amount of the conductive carbon black is less than 2 moles per mole of vanadium pentoxide.

Abstract: An electrode material uses, as an active material, sodium vanadium oxide represented by NaxV2O5 (0<x<0.33) and having a crystal phase of a stoichiometric composition of Na0.33V2O5 or Na1.0V6O15. As a result, together with improving battery capacity by employing a composition in which Na is made to be deficient, satisfactory cycle characteristics can be maintained due to the presence of sodium. In addition, since an electrode material production method uses NaOH and NH4VO3 as raw materials, the electrode material of the present invention can be efficiently produced with heat treatment at a comparatively low temperature.