Patents by Inventor Yoshiki Somatomo
Yoshiki Somatomo 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: 7989100Abstract: A sealed prismatic battery according to the present invention comprises a laterally long cap sealing an opening of an upper surface of a battery can and a safety vent placed on the cap and having a thin-walled valve body which opens in an abnormal rise of a battery internal pressure. The safety vent has an oval-shaped circumferential groove formed inside an oval-shaped coining section provided on an outer surface of the cap and on one end side in a lateral direction of the cap and a thin-walled valve body surrounded thereby, and the oval-shaped circumferential groove is composed of lateral side sections parallel to the lateral direction of the cap and circular arc sections connecting these lateral side sections, with one lateral side section, other lateral side section, and the thin-walled valve body of the safety vent respectively having a thickness increased in this order.Type: GrantFiled: September 12, 2006Date of Patent: August 2, 2011Assignee: Hitachi Maxell Energy, Ltd.Inventors: Yoshimi Matsumoto, Osamu Watanabe, Yoshiki Somatomo
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Patent number: 7754373Abstract: There is provided a sealed prismatic battery having an opening vent excellent in reliability with use of a deformed state of a battery casing on occasion of abnormal increase in internal pressure of the battery. The battery casing is shaped like an oval quadrangle having a width in a direction of thickness smaller than a height in a longitudinal direction and a length in a lateral direction, and side walls of the casing that face in the lateral direction swell outward in the lateral direction so as to form circular-arc shapes in general. The opening vent is composed of a groove formed as a recess on the side wall. A distances from the upper end of the battery casing to the groove is set between 3 and 20% of the longitudinal height of the battery casing.Type: GrantFiled: October 30, 2006Date of Patent: July 13, 2010Assignee: Hitachi Maxell, Ltd.Inventors: Yoshihiko Aizawa, Yoshiki Somatomo
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Patent number: 7732090Abstract: A sealed rectangular battery having a reliably operative explosion-proof valve is provided. A rectangular battery case 1 whose cross-section is oblong, the battery case having a prismatic shaped case body 5 with a bottom and a lid 6. An explosion-proof valve 2 is arranged near one of two opposing short sides of a main surface wall of the lid. The explosion-proof valve a V-cut groove 15 concavely formed in V-shaped or U-shaped in which a central bent part 15a is positioned at a central location in the main surface wall 6a of the lid, and a thin wall 16 formed by the V-cut groove. Cut grooves 18 connecting each of two ends of the V-cut groove and each of two long sides of the main surface wall of the lid which are parallel to each other, respectively, are cut and formed in the main surface wall of the lid.Type: GrantFiled: September 29, 2004Date of Patent: June 8, 2010Assignee: Hitachi Maxell, Ltd.Inventor: Yoshiki Somatomo
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Patent number: 7666547Abstract: A lid 3 that closes the upper surface of the opening of a closed-bottom prismatic tubular battery can 1, an electrode body 2 accommodated in the battery can 1, a negative terminal 12 penetratively fastened to the lid 3, an insulating plate 11 placed on the lower surface side of the lid 3, a lead plate 17 placed on the lower surface side of the insulating plate 11, and a negative electrode current collector lead 7 led upwardly of the electrode body 2 are included. The upper end portion of the current collector lead 7 is welded to the lower surface of the lead plate 17 and bent in a position located rather closer to the front wall of the battery can 1. The insulating plate 11 has a lid side insulating portion 22 held between the lid 3 and the lead plate 17 and a front sidewall 25 that extends downwardly from the front end side of the lid side insulating portion 22.Type: GrantFiled: September 29, 2005Date of Patent: February 23, 2010Assignee: Hitachi Maxell, Ltd.Inventors: Kazuaki Urano, Osamu Watanabe, Yoshiki Somatomo
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Patent number: 7553581Abstract: A sealed prismatic battery is provided. The battery includes a battery casing 4 having a prismatic cylindrical shape of body with a bottom part and an upper opening, and a lid 5 which fits in the upper opening of the battery casing. The opening of the casing body 4 and the lid 5 have laterally long shape in which the back-and-forth width dimension is smaller than the lateral length. The outer periphery of the lid 5 being welded to the periphery of the upper opening of the battery casing 4 to form a welded portion. The welded portion includes a pair of fragile parts 11 having low weld strength and formed at the ends of two long sides 10a and 10b of the welded portion which are parallel to each other, respectively, The battery is appropriately prevented from exploding and strength of battery is sufficiently provided against an impact caused by fall or the like.Type: GrantFiled: November 18, 2004Date of Patent: June 30, 2009Assignee: Hitachi Maxell, Ltd.Inventors: Naoto Sugimune, Yoshiki Somatomo, Toshiya Takaishi, Shota Aoki
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Patent number: 7524578Abstract: A battery can 2 is composed of a can body 3 having a concave portion 31 for accommodating an electrode body 5, and a metal cover 4 for sealing an opening end of the concave portion 31 of the can body 3. The can body 3 is formed in a plate shape by subjecting a metal plate to shallow drawing. A flange 32 is provided at a peripheral edge portion of the opening end of the can body 3, which is bonded to be integrated with the metal cover 4 to keep an air-tight and liquid-tight state in the concave portion 31.Type: GrantFiled: July 5, 2002Date of Patent: April 28, 2009Assignee: Hitachi Maxell, Ltd.Inventors: Yoshiki Somatomo, Osamu Watanabe, Masatoshi Tanaka
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Patent number: 7261971Abstract: A battery provided with one end of each lead element connected to the positive and negative electrode respectively is drawn out from the can body 3 through a space 6 formed at a surface part of said jointed flange section 32a, 32b and the area of the flange section around the drawing space is sealed by a resin bonding. The battery provided with a new structure which can solve the problems which may be generated in all fields, such as battery shape, attachment property, battery strength, productivity and so on in order to make a thin type battery.Type: GrantFiled: December 1, 2003Date of Patent: August 28, 2007Assignee: Hitachi Maxell Ltd.Inventors: Hayato Higuchi, Naoto Sugimune, Tohsiya Takaishi, Yoshiki Somatomo
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Publication number: 20070099070Abstract: There is provided a sealed prismatic battery having an opening vent excellent in reliability with use of a deformed state of a battery casing on occasion of abnormal increase in internal pressure of the battery. The battery casing is shaped like an oval quadrangle having a width in a direction of thichness smaller than a height in a longitudinal direction and a length in a lateral direction, and side walls of the casing that face in the lateral direction swell outward in the lateral direction so as to form circular-arc shapes in general. The opening vent is composed of a groove formed as a recess on the side wall. A distances from the upper end of the battery casing to the groove is set between 3 and 20% of the longitudinal height of the battery casing.Type: ApplicationFiled: October 30, 2006Publication date: May 3, 2007Inventors: Yoshihiko Aizawa, Yoshiki Somatomo
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Publication number: 20070059586Abstract: A sealed prismatic battery according to the present invention comprises a laterally long cap sealing an opening of an upper surface of a battery can and a safety vent placed on the cap and having a thin-walled valve body which opens in an abnormal rise of a battery internal pressure. The safety vent has an oval-shaped circumferential groove formed inside an oval-shaped coining section provided on an outer surface of the cap and on one end side in a lateral direction of the cap and a thin-walled valve body surrounded thereby, and the oval-shaped circumferential groove is composed of lateral side sections parallel to the lateral direction of the cap and circular arc sections connecting these lateral side sections, with one lateral side section, other lateral side section, and the thin-walled valve body of the safety vent respectively having a thickness increased in this order.Type: ApplicationFiled: September 12, 2006Publication date: March 15, 2007Inventors: Yoshimi Matsumoto, Osamu Watanabe, Yoshiki Somatomo
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Publication number: 20060292437Abstract: A sealed prismatic battery includes a laterally elongated cap that closes the upper surface of the opening of a battery can 1 and a safety vent that is provided at the cap and opens when the battery internal pressure abnormally rises. The safety vent has a looped groove that is formed recessed and located nearer to the left end of the cap on the outer surface side of the cap. The looped groove is annularly formed of front, rear, left and right groove portions into a laterally elongated prismatic shape, and the thickness of the bottom wall of the end side groove portion is thicker than that of the bottom walls of the other groove portions. The center side groove portion of the looped groove is formed into a circular arc shape curved convex toward the center side of the cap.Type: ApplicationFiled: November 17, 2005Publication date: December 28, 2006Applicant: HITACHI MAXELL, LTD.Inventors: Yoshimi Matsumoto, Osamu Watanabe, Yoshiki Somatomo
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Publication number: 20060073382Abstract: A lid 3 that closes the upper surface of the opening of a closed-bottom prismatic tubular battery can 1, an electrode body 2 accommodated in the battery can 1, a negative terminal 12 penetratively fastened to the lid 3, an insulating plate 11 placed on the lower surface side of the lid 3, a lead plate 17 placed on the lower surface side of the insulating plate 11, and a negative electrode current collector lead 7 led upwardly of the electrode body 2 are included. The upper end portion of the current collector lead 7 is welded to the lower surface of the lead plate 17 and bent in a position located rather closer to the front wall of the battery can 1. The insulating plate 11 has a lid side insulating portion 22 held between the lid 3 and the lead plate 17 and a front sidewall 25 that extends downwardly from the-front end side of the lid side insulating portion 22.Type: ApplicationFiled: September 29, 2005Publication date: April 6, 2006Applicant: HITACHI MAXELL, LTD.Inventors: Kazuaki Urano, Osamu Watanabe, Yoshiki Somatomo
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Publication number: 20050136323Abstract: A sealed prismatic battery is provided. The battery includes a battery casing 4 having a prismatic cylindrical shape of body with a bottom part and an upper opening, and a lid 5 which fits in the upper opening of the battery casing. The opening of the casing body 4 and the lid 5 have laterally long shape in which the back-and-forth width dimension is smaller than the lateral length. The outer periphery of the lid 5 being welded to the periphery of the upper opening of the battery casing 4 to form a welded portion. The welded portion includes a pair of fragile parts 11 having low weld strength and formed at the ends of two long sides 10a and 10b of the welded portion which are parallel to each other, respectively, The battery is appropriately prevented from exploding and strength of battery is sufficiently provided against an impact caused by fall or the like.Type: ApplicationFiled: November 18, 2004Publication date: June 23, 2005Applicant: HITACHI MAXELL, LTD.Inventors: Naoto Sugimune, Yoshiki Somatomo, Toshiya Takaishi, Shota Aoki
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Publication number: 20050136325Abstract: A sealed prismatic battery in which the number of manufacturing steps of the battery is not increased and a battery case does not need to be thinned so much for preventing an explosion. The battery includes a prismatic shaped battery case. The battery case has a pair of opposing wide side walls and a pair of opposing narrow side walls and the width between the pair of opposing wide side walls is smaller than a vertical height of the battery case. The thickness of one of the pair of opposing wide side walls is smaller than the thickness of the other.Type: ApplicationFiled: November 24, 2004Publication date: June 23, 2005Applicant: HITACHI MAXELL, LTD.Inventors: Yoshihisa Fujihara, Yoshiki Somatomo, Mayumi Yamamoto
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Publication number: 20050095502Abstract: A sealed battery capable of increasing the battery capacity while ensuring high sealing properties can be obtained. The sealed battery comprises, a battery case 1, a lid 7 for closing the opening top face of the battery case 1, a terminal mounting hole 13 in the lid 7, and a negative terminal 11 engaging with the terminal mounting hole 13 via an insulating packing 9. The negative terminal 11 comprises, a head portion 19, a tapered portion 21 continuing to the lower face of the head portion 19 and an axial portion 22 protruded downward from the tapered portion 21. The insulating packing 9 comprises, a cylindrical portion 25 having a through hole 24 through which the axial portion 22 of the output terminal 11 penetrates, and a flange 26 lying between the head portion 19 of the output terminal 11 and the lid 7.Type: ApplicationFiled: October 1, 2004Publication date: May 5, 2005Applicant: HITACHI MAXELL, LTD.Inventors: Naoto Sugimune, Yoshiki Somatomo, Toshiya Takaishi
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Publication number: 20050069760Abstract: A sealed rectangular battery having a reliably operative explosion-proof valve is provided. A rectangular battery case 1 which is long in the horizontal direction includes a square tube shaped case body 5 with a bottom in which the upper surface opens, and a lid 6 closing the opened upper surface of the case body 5 in a sealing manner. An explosion-proof valve 2 is arranged near a reference short side 6c of a installation surface wall 6a of the lid 6. The explosion-proof valve 2 includes a V-shaped groove 15 concavely formed in V-shaped or U-shaped in which a central bent part 15a is positioned at a central location in the front-back direction of the installation surface wall 6a and expanding in the front-back direction, and a thin wall 16 formed by the V-shaped groove 15. A cut groove 18 connecting the front-back end of the V-shaped groove 15 and the long side 6d in the front-back direction of the installation surface wall 6a is cut and formed in the installation surface wall 6a.Type: ApplicationFiled: September 29, 2004Publication date: March 31, 2005Inventor: Yoshiki Somatomo
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Publication number: 20040180260Abstract: A battery can 2 is composed of a can body 3 having a concave portion 31 for accommodating an electrode body 5, and a metal cover 4 for sealing an opening end of the concave portion 31 of the can body 3. The can body 3 is formed in a plate shape by subjecting a metal plate to shallow drawing. A flange 32 is provided at a peripheral edge portion of the opening end of the can body 3, which is bonded to be integrated with the metal cover 4 to keep an air-tight and liquid-tight state in the concave portion 31.Type: ApplicationFiled: January 2, 2004Publication date: September 16, 2004Inventors: Yoshiki Somatomo, Osamu Watanabe, Masatoshi Tanaka
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Publication number: 20040166406Abstract: A battery provided with one end of each lead element connected to the positive and negative electrode respectively is drawn out from the can body 3 through a space 6 formed at a surface part of said jointed flange section 32a, 32b and the area of the flange section around the drawing space is sealed by a resin bonding.Type: ApplicationFiled: December 1, 2003Publication date: August 26, 2004Inventors: Hayato Higuchi, Naoto Sugimune, Tohsiya Takaishi, Yoshiki Somatomo
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Patent number: D479192Type: GrantFiled: September 19, 2002Date of Patent: September 2, 2003Assignee: Hitachi Maxell, Ltd.Inventors: Yoshihisa Fujihara, Naoto Sugimune, Yoshiki Somatomo
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Patent number: D481994Type: GrantFiled: October 25, 2002Date of Patent: November 11, 2003Assignee: Hitachi Maxell, Ltd.Inventors: Yoshihisa Fujihara, Naoto Sugimune, Yoshiki Somatomo
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Patent number: D483325Type: GrantFiled: October 25, 2002Date of Patent: December 9, 2003Assignee: Hitachi Maxell, Ltd.Inventors: Yoshihisa Fujihara, Naoto Sugimune, Yoshiki Somatomo