The Furukawa Electric Co., Ltd.

Jx Nippon Oil Energy Corporation

Nec Corporation

University of Yamanashi

Takeshi Nishizawa

Atsuo Omaru

Kazuhiko Ooba

Gou Isobe

Eiji Takahashi

Osamu Yamashita

Takehiro Toyooka

Akira Matsuo

Masanori Ozaki

Akihiro Suzuki

Tetsuo Shirasu

Hidekazu Takada

Hideaki Kameoka

Tatsuo Yoshisue

Koutaro Tsuri

An organic electrolyte improves the organic electrolyte storage battery of an electric vehicle in the initial storage capacity that affects the possible cruising range. The electrolyte includes a compound represented by formula (1) below and a compound represented by formula (2) below: wherein Rto Rare each independently hydrogen, an alkyl group, a halogenated alkyl group, or halogen, Ris an alkylene group or a halogenated alkylene group and Ris a group having a symmetrical structure about Ras the rotational axis;R&#x2014;R&#x2014;R&#x2003;&#x2003;(2)wherein Ris a vinyl group, a cyclic carbonic acid ester group, cyclic sulfite group, chain carbonic acid ester group or chain sulfite group, or &#x2014;SO&#x2014;, Rand Rare each independently hydrogen, a halogen, an alkyl group, a halogenated alkyl group, or a vinyl, phenyl or cyclohexyl group, and when Ris &#x2014;SO&#x2014;, Rand Rmay bond to each other to form a ring.

Organic electrolyte and organic electrolyte storage battery

The present invention provides an electrolyte for a Li storage battery comprising a compound that can improve safety of a storage battery without causing the degradation in performances thereof and a Li storage battery comprising the electrolyte. The electrolyte comprises at least 1,1-diphenylethane the Li storage battery comprises the electrolyte. Particularly preferably provided are an electrolyte for a Li storage battery comprising 1,1-diphenylethane, a cyclic carbonate (e.g., ethylene carbonate), a chain carbonate (e.g., dimethyl carbonate, diethyl carbonate, ethyl methyl or ethylmethyl carbonate) and a Li salt and a Li storage battery comprising such an electrolyte.

Electrolyte for Li storage battery and Li storage battery

Disclosed is a highly safe battery separator, in particular a separator for a lithium ion secondary battery, which reduces internal resistance, achieves good ionic conductivity, prevents passing of electrode active materials, and also prevents electrical short circuit by controlling deposition of lithium metal (dendrite). Also disclosed is a means for stably producing the battery separator with high productivity. Specifically disclosed are: a battery separator which is composed of a porous polyolefin sheet that is formed from a group of polyolefin nanofilaments that have an average filament diameter of less than 1 &#x3bc;m and a filament size distribution of 0.2 or less; and a means for producing the battery separator.

Battery separator comprising a polyolefin nanofilament porous sheet

A heat exchanger tube for effecting a heat exchange between a fluid inside the heat exchanger tube and another fluid flowing outside the heat exchanger tube, which is provided with a first kind of spiral grooves and a second kind of spiral grooves, each being formed on an outer surface of the heat exchanger tube. The twisting direction of the first kind of spiral grooves in relative to the axis of the heat exchanger tube is the same as that of the second kind of spiral grooves but differs in helix angle from each other with helix angles of the first kind of spiral grooves and the second kind of spiral grooves falling within the range of 3.degree. to 80.degree. in relative to the axis of the heat exchanger tube.

Heat exchanger tube and method for manufacturing the same

One heat transfer tube for an absorption refrigerating machine of the present invention has a plurality of grooves formed on the circumferential surface of a tube at uniformly angular intervals to extend continuously or discontinuously in the length direction of the tube, wherein the width and/or depth of each groove gently varies in the length direction of the groove, and the height of each ridge between the mutually adjacent grooves gently varies from the axial tube center in the length direction of the ridge. Another heat transfer tube of the present invention has a large number of concave portions formed in rows on the circumferential surface of the tube at predetermined angular intervals and each having a gently down-grade surface extending in the tube length direction to gradually get closer to the axial tube center and a gently up-grade surface extending continuously from the down-grade surface in the tube length direction to gradually become more distant from the axial tube center. Since the heat transfer tube has a plurality of grooves and ridges or concave portions formed on the circumference of the tube, the diffusion and interfacial turbulence of a medium can be substantially accelerated in both the axial and circumferential directions to display higher heat transfer performance.

Heat transfer tube for absorption refrigerating machine

According to the invention, there is provided a heat transmission tube having a tube body, first grooves formed at a predetermined pitch therebetween on an outer surface of the tube body continuously along a circumferential direction, the first grooves open to an outside, and having an opening portion, a width of which is narrower than that of a bottom portion thereof, and second grooves formed at a predetermined pitch therebetween on the outer surface of tube body continuously along an axial direction, the second grooves having a depth shallower than that of the first grooves, and connecting opening portions of the adjacent first grooves to each other, wherein a projecting member is provided on a bottom surface of each of the first grooves so as to connect a side wall of each of the first grooves to another is brought into contact with the tube body. This heat transmission tube exhibits a high and stable heat transmissibility in both high and low heat flux cases.

Heat transmission tube

A hermetically sealed electrostrictive actuator comprises a metal case and a metal cap for housing an electrostrictive element therein. The metal cap is provided with a pair of glass sealing terminals to be connected to a pair of lead wires of the electrostrictive element. The metal case is provided a flexible region so as to follow the expansion and constraction of the electrostrictive element without breaking the hermetic envelope of the metal case and the metal cap.

Growing community of inventors

Tokyo, Japan

Takeshi Nishizawa