Yazaki Corporation

Kouichi Yamamoto

Satoshi Ishikawa

Shigemi Hashizawa

Hidehiro Ichikawa

Hiroshi Miyamoto

Kunihiko Yamada

You Yanagida

Ryohei Nishizaki

Kazutomo Fujinami

Akihito Shibuya

Hiroki Maegawa

Kenji Uchida

Toshihiro Katsuta

Shigerni Hashizawa

A detection device includes a switch unit, the switch unit performs switching to a gain reduction state in which a gain of a loop antenna is reduced or a gain non-reduction state in which the gain of the loop antenna is not reduced in correspondence with a state of a detection target. When a wavelength of an electric wave is set as &#x3bb;, the switch unit includes switch terminals for reducing the gain of the loop antenna within a range K1 on the loop antenna from a first circuit terminal to a position that is spaced away from the first circuit terminal by &#x3bb;/8. In addition, the switch unit includes switch terminals for reducing the gain of the loop antenna within a range on the loop antenna from a second circuit terminal to a position that is spaced away from the second circuit terminal by &#x3bb;/8.

Detection device and detection system

A cooling system for a battery pack which can reduce the number of components, manufacturing cost and an installation space, is provided. The battery pack includes high-voltage electrically conductive paths connected to a positive electrode and a negative electrode thereof, respectively. The high-voltage electrically conductive path connected to the positive electrode serves as a cooling member. The high-voltage electrically conductive path connected to the positive electrode is arranged along the battery pack to absorb heat generated at the battery pack and dissipate the absorbed heat at a location distant from the battery pack. The invention takes an advantage of the superior heat conductivity of the high-voltage electrically conductive path to cool down the battery pack.

Cooling system for battery pack

A water stopping structure includes a water stopping member that has an outer peripheral face which is inclined with respect to an axis direction of a shielded wire, and that is adapted to contract a diameter thereof and attached on an outer face of the shielded wire in a state that the outer peripheral face of the water stopping member is positioned to an end portion of the sheath which is adjacent to an exposed portion of the outer sheath, and a fastening ring that has an inner peripheral face which is corresponded to the outer peripheral face of the water stopping member in inclination. The fastening ring is slid in the axis direction of the shielded wire so as to press the end portion of the sheath of the shielded wire for contracting the diameter of the water stopping member in a state that the inner peripheral face of the fastening ring is arranged on the outer peripheral face of the water stopping member.

Water stopping structure and water stopping method

A switching circuit includes a capacitor, a combination battery having a plurality of unit cells connected in series, each of the unit cells containing battery, and a plurality of change-over switches sequentially connecting both ends of the each of the unit cells to the capacitor. The change-over switch has two semiconductor switches connected in series so that the source-drain directions thereof are oriented opposite to each other.

Switching circuit and voltage measuring circuit

To simply provide a water-stopping structures for shielded electric wire in the shielded portion of the wire at a low cost, a water stop structure in a shielded electric wire is comprised by stripping a sheathof the shielded electric wire in the middle part thereof; permeating an adhesive into the exposed shield member; overlaying a heat shrinkable tubeover the shield member via hot melt; and heat shrinking the heat shrinkable tubein a state where both ends of the heat shrinkable tubeare overlapped with the outer periphery of the sheath

Structure and method for stopping water in shielded electric wire

It is an object to provide an individual voltmeter apparatus utilizing a switching circuit which suppresses the variation of the consumption power of the unit cell of a set of batteries. The power supply of a first current pathand a second current pathof a level shift circuitis between the unit cell Vm+1 and V, and between the unit cell Vm+1 and one lower rank cell Vm, respectively. The same current, which responds to all semiconductor switches, flows in the first current path. In the second current path, a larger current is provided to the second current path in which the semiconductor switch is connected to the higher rank unit cell.

Switching circuit and individual voltmeter apparatus

A method of detecting a state of an insulation resistance fall detector that includes: a detection resistance connected in series to an insulation resistance between a vehicle body and a power source; a condenser provided between the insulation resistance and the detection resistance; a pulse signal applying unit that applies a pulse signal to a serial circuit constituted by the insulation resistance, the condenser and the detection resistance; a low pass filter that filters a voltage of a connecting point between the coupling condenser and the detection resistance; and a fall detecting unit that detects a fall of the insulation resistance on the basis of the output of the filter, the method comprising the steps of: varying a pulse width of the pulse signal; and detecting the state of the insulation resistance fall detector on the basis of the output of the filter when the pulse width is varied.

State detecting method and insulation resistance fall detector

An insulation resistance drop detectorand a method of detecting a state of malfunction of the detectorare provided. When open of a coupling capacitor Co or malfunction of a lowpass filteris occurred, a time constant of the low pass filteris decreased and a rising time of an output of the lowpass filteragainst an output of a pulse signal Pbecomes shorter than that in a state of normal. Thereby, malfunction of the detectorcan be detected based on the output of the filtercorresponding to change of frequency of the pulse signal P

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Shizuoka, Japan

Kouichi Yamamoto