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81. 发明专利

JP2001202969A ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2001202969A
公开(公告)日：2001-07-27
申请号：JP2000007884
申请日：2000-01-17
申请人： TOSHIBA BATTERY
发明人： HATA KATSUYUKI , SATO TOSHIKI
IPC分类号： H01M4/24 , H01M4/80 , H01M10/24
摘要： PROBLEM TO BE SOLVED: To provide an alkaline secondary battery, in which inner short circuit which occurs during the manufacture of electrode group is restrained. SOLUTION: At least either a cathode or an anode includes an electrically conductive substrate 17, having a three-dimensional porous layer 14, which has a metal structure which is arranged three-dimensionally, and a two-dimensional porous layer 16 which covers both sides of the above three-dimensional porous layer 14, and has a metal structure 15 which is arranged two- dimensionally.

82. 发明专利

JP2001052690A ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2001052690A
公开(公告)日：2001-02-23
申请号：JP21989599
申请日：1999-08-03
申请人： TOSHIBA BATTERY
发明人： KAWAI HIROKI , TAMURA MASANORI , HATA KATSUYUKI
IPC分类号： H01M4/24 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To provide an alkaline secondary battery having a high discharge capacity at a low temperature and a long lifetime. SOLUTION: The negative electrode 4 of an alkaline secondary battery is formed from a hydrogen storage alloy containing rare earth elements La and Ce, and Ni and Co and having a composition to meet the condition 2.5

83. 发明专利

JP2000277102A MANUFACTURE OF ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2000277102A
公开(公告)日：2000-10-06
申请号：JP7779899
申请日：1999-03-23
申请人： TOSHIBA BATTERY
发明人： HATA KATSUYUKI
IPC分类号： H01M4/52 , H01M4/32 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To provide a secondary battery having high discharge capacity even if cobalt monoxide powder which has been kept on standby for a long time is utilized by providing a positive electrode containing cobalt monoxide powder formed by firing cobalt hydroxide powder with an antioxidant deposited on at least part of the surface of its each particle, and nickel hydroxide. SOLUTION: Cobalt hydroxide powder with an antioxidant deposited on at least part of the surface of its each particle is made by mixing an organic compound-based antioxidant such as phenyl-β-naphthylamine with cobalt hydroxide powder. Paste is prepared by adding nickel hydroxide powder, a binder such as polytetrafluoroethylene and water to the cobalt hydroxide powder and by kneading them, and a positive electrode 2 is made by applying the paste to a collector such as a punched metal, by drying it and by shaping the collector. This alkaline secondary battery is made by receiving an electrode group 5 composed by laminating and spirally rolling the positive electrode 2, a separator 3 and a negative electrode 4 in a bottomed cylindrical container 1 and by injecting an alkaline electrolyte such as a sodium hydroxide aqueous solution.

84. 发明专利

JP2000277101A POSITIVE ELECTRODE FOR ALKALINE SECONDARY BATTERY AND ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2000277101A
公开(公告)日：2000-10-06
申请号：JP7779799
申请日：1999-03-23
申请人： TOSHIBA BATTERY
发明人： HATA KATSUYUKI , TAKAHASHI HIROYUKI
IPC分类号： H01M4/52 , H01M4/32 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To improve the capacity recovery rate of a secondary battery in recharging after over discharge by composing a positive electrode with nickel hydroxide and cobalt oxide containing carbon at a specific ratio. SOLUTION: This positive electrode 2 for an alkaline secondary battery is formed by retaining a mix containing nickel hydroxide and cobalt oxide of which content of carbon is 10-500 ppm on a collector of a punched metal or the like. For the nickel hydroxide powder, powder formed of only nickel hydroxide, or nickel hydroxide powder having eutectic zinc and/or cobalt is used. The cobalt monoxide powder which contains a predetermined quantity of carbon and has an average particle diameter of 0.1-10 μm is provided by firing cobalt hydroxide powder with an organic compound-based antioxidant deposited on at least part of the surface of its each particle. A binder such as polytetrafluorene is preferably included in the mixture. This alkaline secondary battery is made by receiving an electrode group 5 composed by laminating and spirally rolling the positive electrode 2, a separator 3 and a negative electrode 4 in a bottomed cylindrical container 1 and by injecting an alkaline electrolyte.

85. 发明专利

JP2000133319A INSPECTION METHOD FOR ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2000133319A
公开(公告)日：2000-05-12
申请号：JP30207898
申请日：1998-10-23
申请人： TOSHIBA BATTERY
发明人： HATA KATSUYUKI , KAWAI HIROKI
IPC分类号： G01R31/36 , G01R31/02 , H01M10/42 , H01M10/48
摘要： PROBLEM TO BE SOLVED: To accurately judge defective product due to a micro short circuit in a short time by measuring voltage after storage at a specific temperature in a charged state. SOLUTION: A secondary battery comprising a spiral electrode group of a positive electrode containing nickel hydroxide particles and a conductive cobalt compound or the like, a negative electrode containing a hydrogen storage alloys or the like, and separators, and a mixed alkaline electrolyte of NaOH and LiOH is charged, and a voltage measured after storage at -10-30 deg.C is compared with a reference voltage. In the case of charging state, voltage reduction caused by self-discharge, which occurs as an original chemical characteristic, depends on temperature. While, because voltage reduction due to a physical cause such as a micro short circuit does not depend on temperature, existence of micro short circuit is judged based on the voltage measured after storage in a suitable low temperature atmosphere to restrain the self-discharge. When the storage temperature is set lower, depending on the composition of alkaline electrolyte, crystallization occurs to cause battery characteristic degradation, therefore, the range of 0-10 deg.C is desirable.

86. 发明专利

JP2000123837A PASTE FOR ALKALINE SECONDARY BATTERY, MANUFACTURE OF PASTE TYPE ELECTRODE AND MANUFACTURE OF ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2000123837A
公开(公告)日：2000-04-28
申请号：JP29200398
申请日：1998-10-14
申请人： TOSHIBA BATTERY
发明人： HATA KATSUYUKI
IPC分类号： H01M4/62 , H01M4/24 , H01M4/26 , H01M10/24
摘要： PROBLEM TO BE SOLVED: To provide paste capable of restraining a viscosity change during storage without impairing a charge/discharge characteristic by including an active material, an organic binder and a specific quantity of ammonia. SOLUTION: Ammonia not more than 800 ppm to weight of an organic binder is included. A paste type electrode is desirably manufactured by having a process of adjusting paste containing an active material, an organic binder and ammonia not more than 800 ppm to weight of the organic binder and a process of filling the paste in a conductive core body. A positive electrode 2, a separator 3 and a negative electrode 4 are laminated and wound to be housed in a vessel 1. The negative electrode 4 is arranged on the outermost periphery in contact with the vessel 1. An insulating gasket 8 airtightly fixes a sealing plate 7 by calking for reducing the opening part of the vessel 1. In a positive electrode lead 9, one end is connected to the positive electrode, and the other end is connected to the under surface of the sealing plate 7. A rubber-made safety valve 11 is arranged so as to block up a hole 6, and an enclosing tube 13 covers the side surface of the vessel 1, a presser plate 12 and the bottom part peripheral edge.

87. 发明专利

JP2000030711A ALKALINE SECONDARY BATTERY 失效
公开(公告)号：JP2000030711A
公开(公告)日：2000-01-28
申请号：JP19704598
申请日：1998-07-13
申请人： TOSHIBA BATTERY
发明人： KUMAGAI KATSUYA , SATO TOSHIKI , KIYAMA YOSHIHIRO , HATA KATSUYUKI
IPC分类号： H01M10/24 , H01M4/24 , H01M4/62
摘要： PROBLEM TO BE SOLVED: To suppress an increase in internal pressure at the time of over-charge without damaging paste-coatability or strength and therefore improve a charge/ discharge cycle life, by providing a paste-type negative electrode including a conductive carbon material and a porous carbon material, each having a specific value of specific surface area. SOLUTION: A negative electrode is manufactured by coating a conductive substrate with a paste made by kneading a conductive material, a hydrogen storage alloy powder, etc., a binder, and pure water together, and then drying and roll-molding it. A conductive carbon material included in the conductive material has a specific surface area of 1000 m2/g or more, and suppresses a fall in the reactivity of the hydrogen storage alloy and a fall in the binding action of the binder. The porous carbon material together included therein has a specific surface area of 2000 to 3400 m2/g, and effectively absorbs hydrogen gas generated in a container at the time of charging without lowering the binding action of the binder. It is suitable to adapt the conductive carbon material to be 0.1 to 2.0 pts.wt., the porous carbon material to be 0.3 to 3.0 pts.wt. and the total of the two to be 0.4 to 4.0 pts.wt., per 100 pts.wt. of the hydrogen storage alloy.

88. 发明专利

JPH11307078A BATTERY 失效
公开(公告)号：JPH11307078A
公开(公告)日：1999-11-05
申请号：JP10671998
申请日：1998-04-16
申请人： TOSHIBA BATTERY
发明人： HATA KATSUYUKI
IPC分类号： H01M2/26 , H01M10/24
摘要： PROBLEM TO BE SOLVED: To stabilize welding capability of resistance welding of a current collecting tab to a positive electrode plate and a sealing plate, and provide a battery having the current collecting tab capable of realizing high welding reliability in the positive electrode plate and the sealing plate by specifying the surface roughness of the current collecting tab of the battery. SOLUTION: A current collecting tab 2 used for this battery has a surface roughness of 0.1-4 μm, and can use the conventional material. The specified surface roughness is formed on the whole surfaces of both sides of the current collecting tab 2 or on only the one side. Only the portion for being welded to a current collecting substrate or a sealing plate may be formed so as to have the specified surface roughness. If the surface roughness is smaller than 0.1 μm, the surface state becomes a smooth surface similar to a bright finishing surface, the contact resistance with a mix non-coating part of the current collecting substrate or the sealing plate is decreased, the generation of Joule heat is decreased, and usable nugget formation is made difficult.

89. 发明专利

JPH103900A SECONDARY BATTERY AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH103900A
公开(公告)日：1998-01-06
申请号：JP15432596
申请日：1996-06-14
申请人： TOSHIBA BATTERY
发明人： SATO TSUTOMU , HATA KATSUYUKI , TAKAHASHI HIROYUKI , TSUKIASHI MASAHIKO
IPC分类号： H01M2/26 , H01M10/04
摘要： PROBLEM TO BE SOLVED: To provide the manufacture of secondary battery, which can obtain a junction part having stabilized strength and impedance, by forming the structure that a collector can be easily joined to a positive electrode lead in a wide range of condition. SOLUTION: A main body 5 of a positive electrode 2 is formed into a sheet, and a lead 4 and a collector 3 are joined to an upper edge of the positive electrode main body 5 by resistance welding. The upper edge of the positive electrode main body 5 is pressed so as to be formed at a thickness at about half of the thickness of the main body 5, and a narrow and long lead 4 is overlapped along the upper edge of the positive electrode main body 5. Furthermore, the collector 3, which is formed with a projecting part in a surface to be joined, is overlapped so that this projecting part abuts on the lead 4, and this overlapped part is pressurized, and welding current is applied to this pressurized part so as to partially melt an area of the projection, and the collector 3 is joined to the lead 4.

90. 发明专利

JPH08190906A MANUFACTURE OF PASTE TYPE ELECTRODE AND PASTE FILLING EQUIPMENT 失效
公开(公告)号：JPH08190906A
公开(公告)日：1996-07-23
申请号：JP253595
申请日：1995-01-11
申请人： TOSHIBA BATTERY
发明人： TAKAHASHI HIROYUKI , MATSUO HIDEHITO , HATA KATSUYUKI
IPC分类号： H01M4/26 , H01M4/62 , H01M4/64
摘要： PURPOSE: To provide a manufacturing method for a paste type electrode and paste filling equipment capable of uniformly filling paste in a belt-shaped current collector. CONSTITUTION: Paste is put in a paste housing container 6 having a current collector inserting hole 6b on its bottom surface, and a paste filling amount adjusting member 15 having a slit 16a is arranged in the container 6 so that the inside of the slit 16a is filled with paste. While constant pressure is applied to the paste from the outside, a belt-shaped current collector is inserted into the container 6 from the current collector inserting hole 6b and passed through the slit 16a of the the paste filling amount adjusting member 15 to fill the paste in the belt-shaped current collector.

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