Patents by Inventor Katsuyuki Shirasawa
Katsuyuki Shirasawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7622219Abstract: A battery pack (10) includes: a battery (1); a circuit substrate (5) having a charge/discharge safety circuit and arranged on one end face (3) of the battery; and an end case (6) in which an external connection terminal (7) is set. In this battery pack, the circuit substrate (5) is arranged inside the end case (6), and the end case (6) is secured to the battery by screws (12) with a screw head (12a) extending through and engaging with the end case (6) at both ends and tips of the screw (12) being engaged into the end face (3) at both ends of the battery (1). This achieves a compact battery pack with a reduced connection resistance, while achieving both high reliability and productivity.Type: GrantFiled: August 3, 2005Date of Patent: November 24, 2009Assignee: Panasonic CorporationInventors: Shinji Ota, Katsuyuki Shirasawa, Toshio Yamashitafuji, Takeshi Ishimaru, Kenjin Masumoto, Hiroaki Imanishi
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Publication number: 20080233472Abstract: A battery pack (10) includes: a battery (1); a circuit substrate (5) having a charge/discharge safety circuit and arranged on one end face (3) of the battery; and an end case (6) in which an external connection terminal (7) is set. In this battery pack, the circuit substrate (5) is arranged inside the end case (6), and the end case (6) is secured to the battery by screws (12) with a screw head (12a) extending through and engaging with the end case (6) at both ends and tips of the screw (12) being engaged into the end face (3) at both ends of the battery (1). This achieves a compact battery pack with a reduced connection resistance, while achieving both high reliability and productivity.Type: ApplicationFiled: August 3, 2005Publication date: September 25, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Shinji Ota, Katsuyuki Shirasawa, Toshio Yamashitafuji, Takeshi Ishimaru, Kenjin Masumoto, Hiroaki Imanishi
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Patent number: 7354677Abstract: A battery pack comprising a lithium ion secondary battery and a current interrupting device for protecting the secondary battery, the secondary battery comprising positive and negative electrodes, a separator interposed between the positive and negative electrodes and a non-aqueous electrolyte, the current interrupting device comprising a recoverable device and a non-recoverable device, the recoverable and non-recoverable devices being connected in series with each other, and the non-recoverable device having an operating temperature of not less than 90° C. and less than 150° C.Type: GrantFiled: December 17, 2003Date of Patent: April 8, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Yoshizawa, Koji Saito, Katsuyuki Shirasawa, Shinji Ohta
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Patent number: 6893753Abstract: A rechargeable battery is integrated with a battery protection circuit that protects the rechargeable battery from overcharging, over discharging, and so forth. A circuit board (9) on which are formed a battery protection circuit, a positive input and output terminal (4), and a temperature detection terminal (6) is disposed on a rechargeable battery (10) via a spacer (13), and the positive and negative electrodes of the rechargeable battery (10) are connected to the circuit board (9). This assembly is enveloped by a cover cap (15) and a cover plate (14), such that the positive input and output terminal (4) and the temperature detection terminal (6) are exposed to the outside through openings provided in the cover plate (14), and one end of the cover cap (15) in the same plane as these is used for connection as a negative input and output terminal (5).Type: GrantFiled: January 13, 2003Date of Patent: May 17, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Iwaizono, Shoji Konishi, Shigeru Kajiwara, Takeshi Ishimaru, Masaru Kawabe, Katsuyuki Shirasawa
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Publication number: 20040146775Abstract: A battery pack comprising a lithium ion secondary battery and a current interrupting device for protecting the secondary battery, the secondary battery comprising positive and negative electrodes, a separator interposed between the positive and negative electrodes and a non-aqueous electrolyte, the current interrupting device comprising a recoverable device and a non-recoverable device, the recoverable and non-recoverable devices being connected in series with each other, and the non-recoverable device having an operating temperature of not less than 90° C. and less than 150° C.Type: ApplicationFiled: December 17, 2003Publication date: July 29, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Hiroshi Yoshizawa, Koji Saito, Katsuyuki Shirasawa, Shinji Ohta
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Patent number: 6759152Abstract: A rechargeable battery pack includes a rechargeable battery having a first electrode and a second electrode; a circuit assembly disposed at one end on a side of a sealing portion of the rechargeable battery; a battery protection circuit for protecting the rechargeable battery from overcharging, the battery protection circuit arranged on a side of the circuit assembly which faces the sealing portion of the rechargeable battery; a plurality of input and output terminals arranged on another side of the circuit assembly, said input and output terminals to which said first electrode and said second electrode are respectively each connected via the battery protection circuit, thereby constituting an intermediate unit in which the rechargeable battery and the circuit assembly are integrated; and an outer case for sealing therein said intermediate unit, the outer case having openings formed at locations corresponding to the input and output terminals.Type: GrantFiled: October 29, 2002Date of Patent: July 6, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Iwaizono, Shoji Konishi, Shigeru Kajiwara, Takeshi Ishimaru, Masaru Kawabe, Katsuyuki Shirasawa
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Publication number: 20030108780Abstract: A rechargeable battery is integrated with a battery protection circuit that protects the rechargeable battery from overcharging, overdischarging, and so forth. A circuit board (9) on which are formed a battery protection circuit, a positive input and output terminal (4), and a temperature detection terminal (6) is disposed on a rechargeable battery (10) via a spacer (13), and the positive and negative electrodes of the rechargeable battery (10) are connected to the circuit board (9). This assembly is enveloped by a cover cap (15) and a cover plate (14), such that the positive input and output terminal (4) and the temperature detection terminal (6) are exposed to the outside through openings provided in the cover plate (14), and one end of the cover cap (15) in the same plane as these is used for connection as a negative input and output terminal (5).Type: ApplicationFiled: January 13, 2003Publication date: June 12, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Iwaizono, Shoji Konishi, Shigeru Kajiwara, Takeshi Ishimaru, Masaru Kawabe, Katsuyuki Shirasawa
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Publication number: 20030077486Abstract: A rechargeable battery pack includes a rechargeable battery having a first electrode and a second electrode; a circuit assembly disposed at one end on a side of a sealing portion of the rechargeable battery; a battery protection circuit for protecting the rechargeable battery from overcharging, the battery protection circuit arranged on a side of the circuit assembly which faces the sealing portion of the rechargeable battery; a plurality of input and output terminals arranged on another side of the circuit assembly, said input and output terminals to which said first electrode and said second electrode are respectively each connected via the battery protection circuit, thereby constituting an intermediate unit in which the rechargeable battery and the circuit assembly are integrated; and an outer case for sealing therein said intermediate unit, the outer case having openings formed at locations corresponding to the input and output terminals.Type: ApplicationFiled: October 29, 2002Publication date: April 24, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Iwaizono, Shoji Konishi, Shigeru Kajiwara, Takeshi Ishimaru, Masaru Kawabe, Katsuyuki Shirasawa
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Patent number: 6524732Abstract: A rechargeable battery is integrated with a battery protection circuit that protects the rechargeable battery from overcharging, overdischarging, and so forth. A circuit board (9) on which are formed a battery protection circuit, a positive input and output terminal (4), and a temperature detection terminal (6) is disposed on a rechargeable battery (10) via a spacer (13), and the positive and negative electrodes of the rechargeable battery (10) are connected to the circuit board (9). This assembly is enveloped by a cover cap (15) and a cover plate (14), such that the positive input and output terminal (4) and the temperature detection terminal (6) are exposed to the outside through openings provided in the cover plate (14), and one end of the cover cap (15) in the same plane as these is used for connection as a negative input and output terminal (5).Type: GrantFiled: November 30, 2000Date of Patent: February 25, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Iwaizono, Shoji Konishi, Shigeru Kajiwara, Takeshi Ishimaru, Masaru Kawabe, Katsuyuki Shirasawa