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31. 发明专利

JP2003187787A METHOD FOR MANUFACTURING LITHIUM BATTERY POSITIVE ELECTRODE 审中-公开
公开(公告)号：JP2003187787A
公开(公告)日：2003-07-04
申请号：JP2001387881
申请日：2001-12-20
申请人： DENSO CORP
发明人： KAMI KENICHIRO , SUZUKI SATORU , ADACHI NORIKAZU
IPC分类号： H01M4/1391 , H01M10/05 , H01M4/04 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a positive electrode for a lithium battery of high energy density and output, even if a solvent comprising water is used as an active material paste. SOLUTION: The manufacturing method comprises a process for preparing paste, a coating process, and a drying process. The coating process and the drying process are performed in a gas atmosphere containing a neutralizing agent. Since no corrosion occurs at a collector at manufacturing, a positive electrode for a lithium battery of high energy density and output is acquired. COPYRIGHT: (C)2003,JPO

32. 发明专利

JP2002352864A METHOD FOR TESTING SECONDARY BATTERY 失效
公开(公告)号：JP2002352864A
公开(公告)日：2002-12-06
申请号：JP2001154199
申请日：2001-05-23
申请人： DENSO CORP , TOYOTA MOTOR CORP
发明人： ADACHI NORIKAZU , SUZUKI SATORU , YAMADA MANABU , SUGIE JUNJI , KAWAI KATSUYOSHI
IPC分类号： G01R31/36 , H01M10/05 , H01M10/0525 , H01M10/058 , H01M10/48 , H02J7/00 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a method for testing a secondary battery by which the secondary battery can be tested safely at low cost. SOLUTION: The method for testing the secondary battery of this invention includes a step of discharging and charging that carries out discharging and charging in the secondary battery treated initial discharging and charging treatment under a discharging and charging current larger than that of the initial discharging and charging current of the initial discharging and charging treatment. The test of the secondary battery is carried out in a short time so that the lowering of battery characteristics is induced by short-circuited a minute place and a place with a possibility of short-circuit in future in the battery are short-circuited by carrying out discharging and charging with a discharging and charging current larger than that of the initial discharging and charging current in the method of testing of the secondary battery of this invention.

33. 发明专利

JP2000058040A POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JP2000058040A
公开(公告)日：2000-02-25
申请号：JP22032198
申请日：1998-08-04
申请人： TOYOTA CENTRAL RES & DEV , DENSO CORP
发明人： HATANAKA TATSUYA , HONMA TAKAHIKO , ADACHI NORIKAZU , KOJIMA HISANAO
IPC分类号： H01M4/36 , H01M4/131 , H01M4/02 , H01M4/58
摘要： PROBLEM TO BE SOLVED: To provide a positive electrode material that can provide a secondary battery, having both superior power density and energy density, in a lithium secondary battery whose positive electrode active material is a spinel structured lithium manganese composite oxide. SOLUTION: A positive electrode material of a lithium secondary battery is constituted, by mixing a complex formed by adhering a first conductive material made of carbon material whose specific surface area is not less than 1,000 m2/g to the surface of spinel structured composite oxide containing lithium and manganese with a second conductive material made of carbon material whose specific surface area is larger than 200 m2/g. This ensures satisfactory electron conductivity of positive electrode and the permeability of lithium ions to improve both the characteristics of power density and energy density.

34. 发明专利

JPH10162825A POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, MANUFACTURE THEREOF, AND POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH10162825A
公开(公告)日：1998-06-19
申请号：JP31637096
申请日：1996-11-27
申请人： DENSO CORP
发明人： ADACHI NORIKAZU , KAWAI JUN , KOJIMA HISANAO
IPC分类号： H01M10/05 , C01B31/02 , H01M4/02 , H01M4/04 , H01M4/36 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide positive electrode active material for a lithium secondary battery in which excellent electrode performance and high electrode performance can be obtained, and a manufacturing method thereof, and provide a positive electrode for a lithium secondary battery in which excellent battery performance and high battery strength can be obtained. SOLUTION: Positive electrode active material for a lithium secondary battery comprises a composite grain 4 composed of a granular mother grain 2 of lithium metal-including oxide, and a granular child grain 3 of lithium metal-including oxide of a smaller grain size than the mother grain 2 attached to and integrated with at least part of the surface of the mother grain 2. A manufacturing method thereof comprises conditioning powder of the mother grain 2 and powder of the child grain 3 to be mixed with each other, and compacting obtained powder mix to be crushed, attaching the child grain 3 to at least part of the surface of the mother grain 2 to integrate the mother grain 2 with the child grain 3 by mechanochemical reaction for forming the composite grain 4. A positive electrode for a lithium secondary battery comprises this positive electrode active material used as electrode material.

35. 发明专利

JP2003157847A METHOD OF MANUFACTURING ELECTRODE FOR LITHIUM BATTERY AND ELECTRODE FOR LITHIUM BATTERY 审中-公开
公开(公告)号：JP2003157847A
公开(公告)日：2003-05-30
申请号：JP2001353522
申请日：2001-11-19
申请人： DENSO CORP
发明人： ADACHI NORIKAZU , SUZUKI SATORU , YAMADA MANABU , AMAGI HIDEO , OGAWA TAKAMASA
IPC分类号： H01M4/13 , H01M4/139 , H01M4/62 , H01M10/05 , H01M4/02 , H01M4/04
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing an electrode for a lithium battery having an excellent output at a low temperature. SOLUTION: This method of manufacturing the electrode for the lithium battery comprises a process to prepare an active material paste having an active material, water and a binder, and a process to apply the active material paste to the surface of a collector and to dry it. The binder has cellulose having adjusted characteristics. In this method, a gap through which lithium ions can pass is formed when the binder coats the surface of the active material, and movement of the lithium ions on the boundary surface of the active material is no more impeded. Thereby, a battery having an enhanced output at a low temperature can be obtained.

36. 发明专利

JP2000353514A MANUFACTURE OF BATTERY SHEET ELECTRODE 失效
公开(公告)号：JP2000353514A
公开(公告)日：2000-12-19
申请号：JP16485799
申请日：1999-06-11
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , DENSO CORP
发明人： KAWAI YASUAKI , MASAKI HIDEYUKI , INOUE TOSHIHIKO , ADACHI NORIKAZU
IPC分类号： H01M4/04
摘要： PROBLEM TO BE SOLVED: To provide an electrode having no lateral dispersion over the whole sheet length and free from the slippage of active material application areas on both sides over the whole sheet length by detecting the application width area of a paste material to be applied to the reference surface of a current collector sheet, and correcting the positional slippage of the application boundary line between both sides of the current collector sheet on the basis of the detection signal. SOLUTION: In application line, a paste material is applied to the reverse side of a current collector sheet S by a reverse application device 18, and un- application area widths on both sides of the application area of the paste material applied to the surface of the current collector sheet S and dried thereon are measured on the carrying line prior to a drying chamber 16. Thereafter, the positional slippages between the application areas of the paste material applied to both the sides of the current collector sheet S and between the boundary lines with the un-application area on both sides are detected, respectively. Further, the positional slippage between the application lines of the paste material applied to both sides of the current collector sheet S is corrected by an application positional slippage correcting device 26.

37. 发明专利

JPH11176447A BATTERY AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH11176447A
公开(公告)日：1999-07-02
申请号：JP34031297
申请日：1997-12-10
申请人： DENSO CORP
发明人： ADACHI NORIKAZU , HASEGAWA JUN , SUZUKI SATORU
IPC分类号： H01M4/64 , H01M6/02 , H01M10/04
摘要： PROBLEM TO BE SOLVED: To provide an electrode constitution, and a battery manufacturing method for reducing electrode winding shifting in a winding type battery. SOLUTION: For a positive electrode 8 and a negative electrode 9, collectors 80, 90 respectively comprising active material attachment zones 8a, 9a and non-attachment zones 8b, 9b are formed by rolling and pressing, and they are wound around a shaft core 2 via a separator 10. The electrodes 8, 9 are welded with end plates 13, 14 at the non-attachment zones 8b, 9b of the collectors 80, 90 extended along a winding direction to be continuous with a positive electrode terminal 3 and a negative electrode terminal 4. In the non-attachment zones 8b, 9b, plural slits 11 and holes 12 are formed to absorb electrode strain stresses.

38. 发明专利

JPH11154515A SECONDARY BATTERY AND POSITIVE ELECTRODE ACTIVE MATERIAL THEREOF 失效
公开(公告)号：JPH11154515A
公开(公告)日：1999-06-08
申请号：JP31858897
申请日：1997-11-19
申请人： DENSO CORP
发明人： OOKIJIMA TAKASHI , SUZUKI SATORU , ADACHI NORIKAZU
IPC分类号： H01M4/36 , H01M4/131 , H01M4/62 , H01M4/02 , H01M4/50 , H01M4/58
摘要： PROBLEM TO BE SOLVED: To improve capacity during low load and high load by containing a first conduction agent covering each particle surface of a number of metal oxides comprising a main body of an active substance, and a second conduction agent intervened between these particles, a specific surface area being smaller than a first conduction agent. SOLUTION: As metal oxide comprising a main body of active positive electrode active material, lithium manganese oxide, lithium nickel oxide or the like can be employed. As a first conduction agent, Kechen black and acetylene black or the like whose specific area is 250 to 1500 m /g can be employed. As a second conduction agent, carbon particles or the like whose specific area is 1 to 200 m /g can be employed. The additive amount of the first conduction agent is preferably 0.5 wt.% or more and 5.0 wt.% or less to a metal oxide. In addition, a total additive amount of the first and second conduction agents is preferably 2.5 wt.% or more and 14.0 wt.% or less.

39. 发明专利

JPH10188955A BATTERY ELECTRODE, MANUFACTURE OF THE ELECTRODE AND BATTERY 失效
公开(公告)号：JPH10188955A
公开(公告)日：1998-07-21
申请号：JP23813697
申请日：1997-09-03
申请人： DENSO CORP
发明人： KAWAI JUN , ADACHI NORIKAZU , KOJIMA HISANAO
IPC分类号： H01M10/05 , H01M4/1391 , H01M4/36 , H01M4/50 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/052 , H01M10/0566 , H01M4/02 , H01M4/04 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To increase the initial discharge capacity of a positive electrode. SOLUTION: The whole surfaces of metal oxide particles 20 of active base material such as LiMn2 O4 are coated with a porous conductive layer 21 formed of carbonaceous material to form active materials 22 and a number of active materials 22 are gathered to form a positive electrode. The porosity of the positive electrode is set to be 18-25%. In this way, mutually opposite properties that adhesivity between the metal oxide particles 20 via the conductive layer 21 is increased to ensure conductivity between the metal oxide particles 20 and the entry of electrolyte into the positive electrode is improved are satisfied at the same time. As a result, the initial discharge capacity of the positive electrode is increased.

40. 发明专利

JP2003157852A METHOD OF MANUFACTURING POSITIVE ELECTRODE FOR LITHIUM BATTERY AND POSITIVE ELECTRODE 审中-公开
公开(公告)号：JP2003157852A
公开(公告)日：2003-05-30
申请号：JP2001353504
申请日：2001-11-19
申请人： DENSO CORP
发明人： ADACHI NORIKAZU , SUZUKI SATORU , YAMADA MANABU
IPC分类号： H01M4/66 , H01M4/131 , H01M4/1391 , H01M4/505 , H01M4/525 , H01M4/02 , H01M4/04 , H01M4/58
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a positive electrode for a lithium battery and the positive electrode causing no corrosion in a collector even if an aqueous solvent is used for active material paste. SOLUTION: This method of manufacturing the positive electrode for the lithium battery and the positive electrode is characterized by that the collector has a protective film suppressing reaction with the active material paste and having electric conductivity on its surface. The positive electrode manufactured by using this method forms an electrode with a positive electrode active material uniformly dispersed therein, and when a lithium battery is formed by using it, effectiveness of displaying high battery characteristics is shown.

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