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1. 发明专利

JPH04280955A METHOD FOR MODIFYING SURFACE OF CHROMIZING STEEL 失效
公开(公告)号：JPH04280955A
公开(公告)日：1992-10-06
申请号：JP6918091
申请日：1991-03-08
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： NEMOTO KIYOMITSU , TOKOI HIROMI , WATABIKI NAOHISA , KAWASAKI KATSUO , YOKOTA NORIKATSU , SHIMOYASHIKI SHIGEHIRO , NISHIMOTO WATARU , IKEDA HIROSHI
IPC分类号： C23C10/40
摘要： PURPOSE:To offer a method for modifying the surface of a chromizing steel improved in corrosion resistance by forming the surface layer of a chromizing steel into a dense and smooth one and modifying chromium carbide into a stabe single kind (Cr23C6). CONSTITUTION:A low carbon steel 10 is subjected to surface treatment by a chromizing method and is thereafter subjected to heating treatment in vacuum or in the atomosphere of an inert gas to densely modify the mesh shape on the surface layer. Or, the surface layer is modified into chromium carbide of a single kind with a Cr23C6 shape.

2. 发明专利

JPH0668905A MOLTEN SODIUM SALT BATTERY 失效
公开(公告)号：JPH0668905A
公开(公告)日：1994-03-11
申请号：JP22142392
申请日：1992-08-20
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： NEMOTO KIYOMITSU , TOKOI HIROMI , KAWASAKI KATSUO , WATABIKI NAOHISA , SHIMOYASHIKI SHIGEHIRO , OKUNO AKIYASU , IKEDA HIROSHI
IPC分类号： H01M10/39
摘要： PURPOSE:To restrain the direct reaction between Na and S, by reacting only Na or both of Na and S with other material to make a compound chemically stable at the time of direct reaction due to the contact between Na and S at the abnormality of a molten sodium salt battery. CONSTITUTION:An inhibitor, against the direct reaction of Na and S, is provided in which one side or both of Na or S and the other material are reacted to be made a chemically stable substance when negative and positive electrode active materials Na and S are directly contacted to be reacted due to the breakage, at the worst, of a beta''-aluminum-made solid electrolyte 2 in a molten sodium salt battery.

3. 发明专利

JPH08148181A SODIUM-SULFUR BATTERY 失效
公开(公告)号：JPH08148181A
公开(公告)日：1996-06-07
申请号：JP28313994
申请日：1994-11-17
申请人： HITACHI LTD
发明人： WATABIKI NAOHISA , NEMOTO KIYOMITSU , TOKOI HIROMI , KAWASAKI KATSUO
IPC分类号： H01M10/39
摘要： PURPOSE: To prevent the fracture of a battery vessel through the discontinuity of direct reaction between sodium and sulfur, even upon the fracture of a solid electrolyte tube, by providing the internal space of a negative electrode vessel with a suction vessel internally decompressed with vacuum. CONSTITUTION: This sodium-sulfur battery is provided with a solid electrolyte tube 1 and an electrical insulation material 11 as a division common to an electrolyte between a negative electrode vessel 9 and a positive electrode vessel 10. A capillary tube 12 is laid in the tube 1. Also, the vessel 9 is filled with sodium as a negative electrode active material 7, and the vessel 10 with sulfur or Na2 Sx as a positive electrode active material 8, thereby forming the battery. A negative electrode is internally provided with a suction vessel 2 and a suction tube 3 for drawing sodium from the tube 1. Furthermore, the end of the suction tube 3 is sealed with a fusible plug 4 and the vessel 2 is decompressed with vacuum. As a result, when the tube 1 is broken, sodium and sulfur instantaneously react with each other directly, thereby generating heat. This reaction heat is used to fuse the plug 4 for breaking the airtightness of the vessel 2. The whole volume of sodium in the tube 1 is thereby drawn into the vessel 2 for interrupting the feed of sodium.

4. 发明专利

JPH05205774A SODIUM/MOLTEN SALT BATTERY 失效
公开(公告)号：JPH05205774A
公开(公告)日：1993-08-13
申请号：JP1361192
申请日：1992-01-29
申请人： HITACHI LTD
发明人： TOKOI HIROMI , TAKAHASHI KAZUO , NEMOTO KIYOMITSU , WATABIKI NAOHISA , KAWASAKI KATSUO
IPC分类号： H01M10/39
摘要： PURPOSE:To enable a battery to be continuously in operation even if the solid electrolyte tube of a certain cell out of a small cluster fails by insulating only the aforesaid cell with the other cells of the small cluster charged with electric current in a cluster battery where small clusters each of which is composed of a plural number of cells connected in parallel, are connected in series. CONSTITUTION:Since Na is directly reacted with S when the solid electrolyte tube 1 of a sodium/sulphur battery is damaged for some reason, working temperature within the battery will be higher than 400 deg.C. This thereby allows a magnet 12 blocking the Na supply port at the bottom section of a Na injection and current collection tube 8 to exceed a Curie point, the magnet 12 is allowed to fall down to the bottom of an electrolyte tube 1 by its own dead weight, so that the supply port is forcibly opened. And Na filled in the inside of the current collection tube 8 and a negative electrode container 4 is allowed to flow out to the electrolyte tube 1, so that the level of Na is thereby lowered from the level 14 of the container 4 down to the level 15 of the current collector 8. By this constitution, even if the electrolyte tube 1 fails, the tube is insulated so as to be deprived of its function, so that the other cells of the small cluster are charged with electric current lost by the failure.

5. 发明专利

JPH08293322A SODIUM-SULFUR BATTERY 失效
公开(公告)号：JPH08293322A
公开(公告)日：1996-11-05
申请号：JP9651695
申请日：1995-04-21
申请人： HITACHI LTD
发明人： WATABIKI NAOHISA , NEMOTO KIYOMITSU , TOKOI HIROMI , KAWASAKI KATSUO
IPC分类号： H01M10/39
摘要： PURPOSE: To facilitate the manufacture of a battery, prevent the penetration of a positive electrode active material to the adhesion part between a solid electronic tube and an electric insulating material and the adhesion part between the electric insulating material and a positive electrode vessel, and also prevent the corrosion of these parts to extend the life of the battery. CONSTITUTION: In a sodium-sulfur battery having a negative electrode active material 5 containing sodium as the essential component, a positive electrode active material containing sulfur or sodium polysulfide as the essential component, and a solid electrolytic tube 4 capable of passing Na ion used both as bulkhead and electrolyte, a corrosion resisting inner vessel and a vapor penetration preventing body are provided in a positive electrode vessel 1.

6. 发明专利

JPS6123998A Method of regenerating spent sodium fluoride adsorbent 失效
标题翻译：再生氟化钠吸附剂的方法
公开(公告)号：JPS6123998A
公开(公告)日：1986-02-01
申请号：JP14427384
申请日：1984-07-13
申请人： Hitachi Ltd
发明人： TSUCHIYA HIROYUKI , KAWASAKI KATSUO , IBA HAJIME , ISHIKURA AKIRA
IPC分类号： B01J20/34 , G21F9/02

7. 发明专利

JPS5344497A REMOVING APPARATUS FOR URANIUM HEXAFLUORIDE 失效
公开(公告)号：JPS5344497A
公开(公告)日：1978-04-21
申请号：JP11936376
申请日：1976-10-06
申请人： HITACHI LTD
发明人： TAKEDA SEIJI , KAWASAKI KATSUO
IPC分类号： C01G43/06
摘要： PURPOSE:To thoroughly remove reaction products including UF4 by reacting trace amts. of UF6 in gas with oil; reacting the formed HF with a HF removing agent in oil; and removing the obtd. solid reaction product, thereby purifying and recycling the oil.

8. 发明专利

JPS5292207A EQUIPMENT FOR RECOVERING WASTE OIL 失效
公开(公告)号：JPS5292207A
公开(公告)日：1977-08-03
申请号：JP849876
申请日：1976-01-30
申请人： HITACHI LTD
发明人： TAKEDA SEIJI , KAWASAKI KATSUO
IPC分类号： C10G29/02 , C01G43/06 , C10G29/12 , C10G53/12
摘要： PURPOSE:An equipment is characterized by the function of rapid separation and recovery of the fine solids without leaving radioactive waste untreated because of the reaction of waste oil with hydrogen fluoride to have them solidified in the suspension of the basic orgenic compounds.

9. 发明专利

JPH05205776A CHEMICAL BATTERY AND ELECTRIC POWER STORAGE SYSTEM 失效
公开(公告)号：JPH05205776A
公开(公告)日：1993-08-13
申请号：JP1396192
申请日：1992-01-29
申请人： HITACHI LTD
发明人： TOKOI HIROMI , NEMOTO KIYOMITSU , KAWASAKI KATSUO , WATABIKI NAOHISA , SHIMOYASHIKI SHIGEHIRO
IPC分类号： H01M10/39
摘要： PURPOSE:To enhance the reliability of a battery by making a positive and a negative terminal conductive only when negative electrode active material is raised up to temperature equal to or more than its melting point, if the chemical battery is made up of a positive electrode region filled with positive electrode active material within a container, a negative electrode region filled with negative electrode active material within the container, and of solid electrolyte interposed between the aforesaid regions. CONSTITUTION:Na is filled in a Na electrode acting as a negative electrode as follows, the Na electrode is evacuated first, Na is filled in the uppermost section of a negative electrode container 4 by way of the uppermost section of a Na injection and electric current collection tube 8, and a filling port is hermetically sealed after filling has been over. The Na side tip end section of a negative electrode terminal 10 is then inserted into the electric current collection tube 8 thereafter. In this case, the tip end of the terminal 10 is so defined in dimension that its does not reach the level of Na. Namely, the length of the terminal 10 and the filling quantity of Na are adjusted in such a way that the container 4 acting as the terminal 10 and Na are in a non-contact condition. This thereby allows the level of Na within the electric current collection tube 8 to be positioned as indicated by the dotted line of a code number 12 at temperatures less than battery operating temperature without being brought into contact with the tip end of the terminal, and if temperature is equal to or more than battery operating temperature, the level is allowed to rise up to a position indicated by the solid line of a code number 13, so that electricity is conducted to the terminal 10.

10. 发明专利

JPH05198313A NA/S BATTERY 失效
公开(公告)号：JPH05198313A
公开(公告)日：1993-08-06
申请号：JP545492
申请日：1992-01-16
申请人： HITACHI LTD
发明人： TOKOI HIROMI , TAKAHASHI KAZUO , HIRANUMA TAKESHI , NEMOTO KIYOMITSU , KAWASAKI KATSUO , WATABIKI NAOHISA
IPC分类号： H01M10/28 , H01M10/39
摘要： PURPOSE:To provide an Na/S battery, which has the high safety and which can be manufactured easily without giving an influence to a solid electrolyte tube and a positive electrode container at the time of raising and lowering the temperature of a battery. CONSTITUTION:An Na/S battery consists of the negative electrode active material 7 essentially composed of Na, the positive electrode active material essentially composed of S or the dissolved salt such as sodium polysulfide, and the solid electrolyte 1, which is interposed between the negative electrode active material and the positive electrode active material and which transmits the Na ion. At this stage, a porous body 14 having a large aperture is installed between a solid electrolyte tube 1 and a positive electrode container 3 so as to be adjacent to the solid electrolyte tube 1, and a porous body 15 having a small aperture is installed to the periphery thereof, and furthermore, a porous body 16 having a large aperture is installed to the periphery thereof.

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