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1. 发明专利

JPH04249853A CYLINDRICAL BATTERY 失效
公开(公告)号：JPH04249853A
公开(公告)日：1992-09-04
申请号：JP51091
申请日：1991-01-08
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINAFUJI TAKESHI , YAMAURA JUNICHI , MORITA TERUYOSHI
IPC分类号： H01M2/26
摘要： PURPOSE:To improve a collecting lead connecting between a spirally wound plate group and an outer terminal such as a sealing plate, eliminate lead breakage at the time of battery assembling, and ease welding between the outer terminal and a lead tip. CONSTITUTION:A contact part, curved in a semicircular arc state so as to fit the curvature of the winding center part of a plate group, is provided on a collecting lead to be arranged on the winding center part of the spiral plate group, and a notched groove and a plate part are provided on a part of the lead part taken out to outside the plate proup. The notched groove and the plate part ensures folding the lead and welding to a sealing plate.

2. 发明专利

JP2004241308A Sealed battery 有权
公开(公告)号：JP2004241308A
公开(公告)日：2004-08-26
申请号：JP2003031224
申请日：2003-02-07
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： HASHIMOTO SATORU , MINAFUJI TAKESHI , SHIRANE TAKAYUKI , TANIGAWA FUTOSHI
IPC分类号： H01M2/12
CPC分类号： Y02E60/12
摘要： PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery, of which, a current breaking means surely operates even overcharged with a large current, enabling to prevent a trouble of explosion or the like and hardly deteriorating its shelf life at a high temperature.
SOLUTION: Of the sealed battery having a battery case in which, a power generating element is inserted together with an electrolyte solution and sealed with a sealing plate, the sealing plate is an anti-explosion sealing plate breaking a current with gas pressure inside the battery, and either a sublimating material, a pyrolyzable material or an evaporative material is arranged at a part inside the sealing plate not touching with the electrolyte solution. These sublimating material, the pyrolyzable material, or the evaporative material never react with the electrolyte solution even stored at a high temperature to result in deterioration of characteristics.
COPYRIGHT: (C)2004,JPO&NCIPI

3. 发明专利

JP2004039587A Manufacturing method of lithium ion secondary cell 审中-公开
公开(公告)号：JP2004039587A
公开(公告)日：2004-02-05
申请号：JP2002198397
申请日：2002-07-08
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： MINAFUJI TAKESHI , TANIGAWA FUTOSHI , MIZUNO KENJI , AIDA YOSHIO , KURANAKA SATOSHI
IPC分类号： H01M10/05 , H01M10/0525 , H01M10/0566 , H01M10/058 , H01M10/40
CPC分类号： Y02P70/54
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion secondary cell with excellent safety, of which operation timing of an inner pressure sensing type safety mechanism is made constant by keeping the volume of the space in the cell constant.
SOLUTION: The lithium ion secondary cell with the inner pressure sensing type safety mechanism is manufactured by introducing a prescribed volume of gas in the cell prior to the injection of liquid, at that time, the volume of the space in the cell is measured by measuring the change of the pressure in the cell, and the volume of liquid to be injected is decided according to the result of the measurement, and the liquid is injected.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2000306558A NONAQUEOUS SOLVENT BASED BATTERY 失效
公开(公告)号：JP2000306558A
公开(公告)日：2000-11-02
申请号：JP11327099
申请日：1999-04-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MIYATA AKIRA , MINAFUJI TAKESHI , TAKAHASHI AKIRA
IPC分类号： H01M2/08 , H01M10/05 , H01M10/0566
摘要： PROBLEM TO BE SOLVED: To improve the electrolyte leakage resisting performance of a battery provided with a crimp type sealing part and thereby to prevent the damage of the battery and an electric circuit due to electrolyte leakage by using a polyamide-amine-based organic agent, and by closing a gap between a metal battery case and a resin sealing plate or a resin gasket. SOLUTION: This nonaqueous solvent-based battery not causing electrolyte leakage, for instance, a nonaqueous solvent-based elliptical battery can be realized by closing a gap between a metal battery case 1 and a resin sealing plate 2 by using a polyamideamine-based organic agent having flowability, for example, fatty acid polyamicieamine or epoxy adduct polyamide as a sealant 3. When a nonaqueous solvent is used as an electrolyte, the sealant 3 is not dissolved in a small quantity of the electrolyte, and the sealant 3 swells and solidifies only on the innermost side of the case of the crimp type sealing part, that is, only at a position where the sealant 3 abuts on the nonaqueous solvent that is a dissolving solation, and its flowability can be kept inside the sealing part, so that an effect on the prevention of the electrolyte leakage is further enhanced.

5. 发明专利

JPH1050339A MANUFACTURE OF LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JPH1050339A
公开(公告)日：1998-02-20
申请号：JP20337596
申请日：1996-08-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMADA MASAHARU , MINAFUJI TAKESHI , OKAMOTO KIYOMI , KATO AKIHIKO
IPC分类号： H01M10/05 , H01M10/052 , H01M10/0566 , H01M10/38 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To enhance the impregnation of an electrolyte in the manufacture of a battery and easier battery characteristics by intermittently repeating at least two times, a pressure reducing pattern at pouring electrolyte in vacuum, when the electrolyte is poured under a reduced pressure. SOLUTION: When a nonaqueous electrolyte is poured under reduced pressure in a lithium ion secondary battery, a pressure reducing pattern in vacuum electrolyte pouring is intermittently repeated at least two times. By intermittently repeating at least two times the pressure reducing pattern and dividing the electrolyte pouring into two times of more, preferably the impregnation of the electrolyte is enhanced.

6. 发明专利

JPH1020005A METHOD FOR MEASURING CAPACITY OF SECONDARY BATTERY 失效
公开(公告)号：JPH1020005A
公开(公告)日：1998-01-23
申请号：JP17887696
申请日：1996-07-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OKAMOTO KIYOMI , MINAFUJI TAKESHI , NIWA YUKIMASA , ISHIDA YOSHIKO
IPC分类号： G01R31/36 , H01M10/48
摘要： PROBLEM TO BE SOLVED: To measure a plurality of battery capacities by the same scale by preliminarily deriving the relation between the battery temperature or environmental temperature of a secondary battery and the discharge capacity, measuring the battery temperature or ambient temperature and the battery capacity in a prescribed calculating point, and correcting the battery capacity under a fixed condition by use of this relation. SOLUTION: The battery temperatures of a plurality of cylindrical lithium secondary batteries of the same kind are changed to measure the battery capacity every temperature, and the correction coefficient f(T) of the battery capacity at 20 deg.C is determined to establish a relational expression C=C'×f(T) of battery capacity after correction C and battery capacity before correction C'. A capacity calculating point is set between discharge start time and discharge end time, including the discharge end time. The time Δt from the capacity calculating point or discharge start time to the next capacity calculating point and the temperature Ti at that time are measured to calculate the discharge capacity ΔC' i during it. This discharge capacity is multiplied by the correction coefficient at that temperature to provide a corrected discharge capacity ΔCi. This is added from discharge start time to discharge end time, whereby the battery capacity after correction is provided.

7. 发明专利

JPH07105970A NON-AQUEOUS SECONDARY BATTERY AND ITS MANUFACTURE 失效
公开(公告)号：JPH07105970A
公开(公告)日：1995-04-21
申请号：JP24456293
申请日：1993-09-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OOHANA YORITO , TSURUTA KUNIO , MINAFUJI TAKESHI , NAKAMURA RIICHI
IPC分类号： H01M4/04 , H01M4/66 , H01M10/38 , H01M10/39
摘要： PURPOSE:To provide a non-aqueous electrolyte secondary battery excellent in the cycle life characteristic and high-load discharging characteristic and establish an associated method for manufacturing such a battery and its positive electrode plate, by enhancing the current collecting performance of a collector and a black mix containing an organic series consistency increasing agent. CONSTITUTION:A black mix of a positive electrode active material containing an organic series consistency increasing agent is applied to an electricity collector to form a work of electrode plate, which is subjected to a heat treatment at 170-350 deg.C and a following rolling process to achieve a positive electrode plate 1. With this positive electrode plate 1 a battery is constructed, which will be equipped with an excellent cycle life characteristic and high-load discharging characteristic.

8. 发明专利

JPH05121064A CYLINDRICAL BATTERY 失效
公开(公告)号：JPH05121064A
公开(公告)日：1993-05-18
申请号：JP28592491
申请日：1991-10-31
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINAFUJI TAKESHI , YAMAURA JUNICHI , MORITA TERUYOSHI
IPC分类号： H01M2/26 , H01M10/04
摘要： PURPOSE:To eliminate risk of damaging an electricity collecting lead at the time of assembly and facilitate welding operation cutting a pair of notches a part of two sides taken out to the outside of the electrode plate of the lead, forming the electrode plate side in a semicircular arc, and allowing the opposite side to assume a flat portion. CONSTITUTION:A positive electrode lead 4 consists of a band-form Ti plate, wherein notches 11 are cut on the left and right sides of the upper part and the top assumes a flat portion 12. The lead 4 is welded to the center of a positive electrode plate, and the part 14 contacting it is bent into a circular arc. Providing the lead in the center of the electrode plate, enables rapid charging and discharging. According to this constitution, a lead deformation takes place as a bending through the action of the notches, and therefore, it is hard to generate stresses and cause breakage to the electrode plates. The flat portion of the lead facilitates welding of a sealing plate, etc., to an external terminal.

9. 发明专利

JP2004055537A Lithium ion secondary battery 有权
公开(公告)号：JP2004055537A
公开(公告)日：2004-02-19
申请号：JP2003149836
申请日：2003-05-27
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： MINAFUJI TAKESHI , TANIGAWA FUTOSHI , ARAI NAOTO
IPC分类号： H01M4/13 , H01M10/05 , H01M10/052 , H01M10/0525 , H01M10/0566 , H01M10/0587 , H01M10/40 , H01M4/02
CPC分类号： Y02E60/122
摘要： PROBLEM TO BE SOLVED: To provide a wound-type lithium ion secondary battery capable of preventing short-circuiting between burr on a positive electrode collector and a negative electrode active material part to achieve high safety. SOLUTION: This lithium ion secondary battery is provided with a positive electrode plate 110 comprising a positive electrode active material part 112 and a positive electrode collector 111 to carry that, a negative electrode plate 120 comprising a negative electrode active material part 122 and a negative electrode collector 121 to carry that, a separator 130 provided between the positive electrode plate 110 and the negative electrode plate 120, electrolyte, and a battery container to contain the positive electrode plate 110, the negative electrode plate 120, the separator 130, and the electrolyte. The positive electrode plate 110 and the negative electrode plate 120 are wound through the separator 130 between them to compose an electrode plate group. In the electrode plate group, both lengthwise end parts 111a and 111b of the positive electrode collector are positioned on the outer side of both lengthwise end parts 122a and 122b of the negative electrode active material part. COPYRIGHT: (C)2004,JPO

10. 发明专利

JP2001357895A NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 失效
公开(公告)号：JP2001357895A
公开(公告)日：2001-12-26
申请号：JP2001111192
申请日：2001-04-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINAFUJI TAKESHI , MINO TATSUJI , YOSHIZAWA KOJI
IPC分类号： H01M2/02 , H01M2/04 , H01M2/06 , H01M2/08 , H01M10/05 , H01M10/0566 , H01M10/058 , H01M10/44 , H01M10/48 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery with high reliability without leaking liquid if exposed to high temperatures in its overcharged state and capable of maintaining its discharging performance. SOLUTION: This battery is equipped with a return-type switch made of a shape memory alloy for cutting off a charging circuit from an external power supply by thermal actuation and simultaneously switching/connecting to a discharging circuit. The switch comprises a temperature sensitive element 1, an insulator 2, a first conductive plate 3a, a second conductive plate 3b, and a resistor R. The sensitive element 1 is electrically connected to the conductive plate 3a in the beginning, When the temperature of the battery rises and exceeds 60 deg.C for example. the memory alloy of the sensitive element 1 is deformed and separated from the conductive plate 3a, thus cutting off the conduction.

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