Denso Corporation

Denso Corpora Tion

Yamato Utsunomiya

Masatomo Yoshihara

Tadahiro Kurasawa

Kazuhiro Andoh

Shinji Usami

Kenji Kawahara

Takeshi Sada

Yuki Tachibana

Shimpei Takita

Shin Takahashi

Shunsuke Tomoto

Shinji Andoh

Misao Shibata

Koji Okamura

A power supply control apparatus is applied to a power supply system. The power supply system includes: a first storage battery and a second storage battery that are connected in parallel to a power generator; and a switch that is provided further towards the first storage battery side than a connection point with the power generator on an electrical path that connects the first storage battery and the second storage battery is. A power supply control apparatus is started in accompaniment with input of a startup signal from outside and controls open and closed states of the switch. The power supply control apparatus includes: an abnormality determining unit that determines whether a startup signal abnormality in which the startup signal has not been received by the power supply control apparatus in a normal manner has occurred; and an abnormality operating unit that operates the switch to a closed state when the startup signal abnormality is determined to have occurred.

Power supply control apparatus and battery unit

A battery pack includes a secondary battery, a state of charge calculator, an integrated current amount calculator, a differential state of charge calculator, a full charge capacity calculator, and a charging-and-discharging control section. The differential state of charge calculator calculates a differential state of charge between a first state of charge at a first detection timing and a second state of charge at a second detection timing. The integrated current amount calculator calculates an integrated amount of a current flowing to the secondary battery in a subject period from the first detection timing to the second detection timing. The full charge capacity calculator calculates a full charge capacity of the secondary battery based on the differential state of charge and the integrated current amount. The charging-and-discharging control section is configured to restrict one of the charging and the discharging of the secondary battery during the subject period.

Battery pack that calculates full charge capacity of a battery based on a state of charge

A power supply control apparatus is applied to a power supply system that includes an opening and closing unit that has a plurality of switches that are connected in series on an energization path over which energization from a voltage source is performed and a plurality of diodes that are respectively connected in parallel to the plurality of switches, in which the plurality of diodes include diodes that are arranged in opposite directions to each other. The power supply control apparatus includes a determining unit determining that an abnormal state has occurred in which a current is flowing to any of the plurality of diodes in a state in which the plurality of switches are turned off, and a control unit controlling the switch that is connected in parallel to the diode through which the current is flowing to an on-state, when the abnormal state is determined to have occurred.

A starter which may employed in starting an engine is provided. The starter includes an electromagnetic actuator and a pinion carrier. The pinion carrier includes a pinion and a holder. The holder retains a shift lever and transmits movement of the shift lever, as achieved by a magnetic attraction produced by the electromagnetic actuator, to the pinion, thereby shifting the pinion into engagement with a ring gear joined to, for example, an engine. The holder is made of material smaller in specific gravity than the pinion. Specifically, the holder is lower in mass or weight than the pinion, thereby permitting the magnetic attraction required to shift the pinion carrier through the shift lever to be decreased. This permits the electromagnetic actuator to be decreased in size.

Compact structure of starter

In a starter, a grommet attached to a yoke of a motor supports a motor terminal plate made of metal. The motor terminal plate is inserted in a penetration hole formed in the grommet. A pig-tail of a positive electrode brush is connected to one end of the M terminal plate projecting toward the inside of the yoke through the penetration hole. The other end of the M terminal plate projecting toward the outside of the yoke through the penetration hole is inserted into the inside of the resin cover through an insert groove formed in the resin cover of the electromagnetic switch. The M terminal plate is positioned in the grommet in the insert direction thereof to limit the movement of the M terminal plate toward the electromagnetic switch side and the motor side. This configuration provides a stable position of the M contact against the resin cover.

Starter

A starter includes a motor and an electromagnetic switch disposed close to and radially outward of the motor. The switch includes a contacts cover, a terminal bolt, and a conductive metal member. The contacts cover is cup-shaped. The terminal bolt is secured in the contacts cover so as to extend in the axial direction of the motor through an end wall of the contacts cover. The metal member has a first and a second end portion. The first end portion is inserted in the contacts cover through a side wall of the contacts cover. The second end portion is located outside the contacts cover and electrically connected to the motor. The switch further includes a movable contact, a first fixed contact that is electrically connected to a power source via the terminal bolt, and a second fixed contact made up of the first end portion of the metal member.

Starter having minimized electromagnetic switch

The electromagnetic switch for use in a starter includes a solenoid including an excitation coil and a plunger, and an energization terminal through which a current is supplied to the excitation coil from an external battery. The excitation coil generating, when applied with the current, a magnetic attraction force to move the plunger in order to close a main contact of the starter to thereby energize a motor of the starter. The energization terminal is constituted by a male terminal having a plate-like shape and insert-molded in the mold cover, and a female terminal fixed to a coil bobbin of the excitation coil and connected with a lead wire of the excitation coil, the female terminal being provided with a fitting section to which the male terminal is fitted so that the male and female terminals are electrically connected to each other.

Electromagnetic switch for use in starter

A starter includes a magnetic switch, a motor, and a terminal. The terminal fixed to both the magnetic switch and the motor and has two end portions in the longitudinal direction of the terminal. An end portion of the terminal confronts a movable contact within the magnetic switch. The other end portion of the terminal is connected to an electric circuitry of the motor therewithin.

Starter having connecting member electrically connecting magnetic switch and motor

An electromagnetic switch has a shaft and a movable contact member slidably supported by the shaft. The shaft is moved with a plunger when an electromagnet is formed of an electromagnetic coil receiving an electric current and attracts the plunger. The movable contact member is moved with the plunger and connects fixed contact members with each other to turn on the switch. The shaft has a shaft body and a projection projected from the shaft body. The movable contact member has a hole. The projection is inserted into the hole to pass through the hole, and the movable contact member is disposed on the shaft body. Then, the movable contact member is rotated so as to engage the projection with the movable contact member. Therefore, the projection prevents the movable contact member from coming out of the shaft.

Growing community of inventors

Kariya, Japan

Yamato Utsunomiya