Patents by Inventor Kenji Nansaka
Kenji Nansaka 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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Publication number: 20120293914Abstract: Disclosed is an accumulator device that can prevent aluminum forming an outer container from forming an alloy with lithium even when fine lithium metal powder is isolated from a lithium ion supply source to adhere to the outer container. The accumulator device has an outer container at least a part of which is formed of aluminum or an aluminum alloy, a positive electrode and a negative electrode that are arranged in the outer container, and an electrolytic solution injected into the outer container and containing a lithium salt, wherein the negative electrode and/or the positive electrode is doped with a lithium ion by electrochemical contact of a lithium ion supply source arranged in the outer container with the negative electrode and/or the positive electrode, and the portion formed of aluminum or the aluminum alloy in the outer container is set to a positive potential.Type: ApplicationFiled: December 3, 2010Publication date: November 22, 2012Applicant: JM Energy CorporationInventors: Kenji Nansaka, Nobuo Ando
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Publication number: 20120281339Abstract: A method of producing an electric storage device includes a fastening that includes fastening a laminate that includes a lithium foil and a metal foil to at least one of a first separator and a second separator using a bonding member, and a winding that includes winding the first separator, the second separator, the laminate, a cathode, and an anode to obtain a wound element, one of the first separator and the second separator being disposed between the cathode and the anode.Type: ApplicationFiled: December 24, 2010Publication date: November 8, 2012Applicant: JM Energy CorporationInventors: Motoki Mizukami, Kenji Nansaka, Nobuo Ando
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Patent number: 8304109Abstract: The sealed battery includes a sealing plate 13 sealing a mouth of an outer can, an external terminal 16 attached to the sealing plate 13 and having a connecting terminal 23, and a current interruption mechanism 18interrupting current in response to pressure increase in the outer can that is installed in a conductive pathway electrically connecting the connecting terminal 23 and an electrode assembly. In the connecting terminal 23, a through-hole 23b continuing to the space on the current interruption mechanism 18 at the side corresponding to the outside of the battery is formed. The through-hole 23b is sealed with a terminal stopper 30 made of an elastic member so as to form a closed space between the terminal stopper 30 and current interruption mechanism 18. An electrolyte or washing solution hardly enters the current interruption mechanism during the manufacture can be provided.Type: GrantFiled: February 24, 2010Date of Patent: November 6, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Kenji Nansaka, Yasuhiro Yamauchi, Toshiyuki Nohma
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Patent number: 8298705Abstract: The sealed battery 10 includes an electrolyte pour hole 15 passing through the sealing plate 12; a rivet 16 having a shank part 16a, a flange part 16b covering a peripheral surface of the electrolyte pour hole 15, and a crimping part 16c in the electrolyte pour hole 15; and a gasket 18 interposed between the electrolyte pour hole 15 and the rivet 16 and adhering to the peripheral surface of the electrolyte pour hole 15 and to a back side of the flange part 16b of the rivet 6; on the peripheral surface of the electrolyte pour hole 15, an inner annular first convex part 17a and an outer annular second convex part 17b are formed; and on the back side of the flange part 16b of the rivet 16, an annular third convex part 16d is formed so as to be superimposed over the second convex part 17b.Type: GrantFiled: May 13, 2010Date of Patent: October 30, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Yusuke Itoh, Kenji Nansaka, Yasuhiro Yamauchi
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Publication number: 20120270098Abstract: The external terminal 19 has sword-guard portion 191 provided with a terminal portion 193 formed at one end thereof and a cylindrical crimping member 192 formed at another end thereof, the cylindrical crimping member 192 being inserted through openings each formed at a first insulating member 211, the opening-sealing plate 13, a second insulating member 212 and the collector 181, and being crimped in a diameter-enlarging direction, so that the sword-guard portion 191 of the external terminal 19, the opening-sealing plate 13 and the collector 181 are mechanically-fixed and a thin-walled portion made thinner than other portions formed in a tip portion of the cylindrical crimping member 192 is adhered to the collector, and the thin-walled portion 194 and the collector being welded with a high energy beam.Type: ApplicationFiled: June 28, 2012Publication date: October 25, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yasuhiro Yamauchi, Kenji Nansaka, Toshiyuki Nohma
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Patent number: 8257861Abstract: A sealed battery including: an electrode assembly 11 having multiple positive electrode substrates exposed at one end and negative electrode substrates exposed at the other end; and collectors 181 and collector receiving parts 183 that are resistance-welded on both sides of the multiple positive or the multiple negative electrode substrates or both, grooves 23 being formed around the resistance-welded portion of at least one of the collector 181 and the collector receiving part 183. Due to the spattered particles 26 generated during the resistance-welding being captured within the grooves 23, few particles burst into the inside of the electrode assembly 11 or into the outside.Type: GrantFiled: September 25, 2008Date of Patent: September 4, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Yasutomo Taniguchi, Kenji Nansaka, Yasuhiro Yamauchi, Toshiyuki Nohma
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Patent number: 8232002Abstract: The external terminal 19 has sword-guard portion 191 provided with a terminal portion 193 formed at one end thereof and a cylindrical crimping member 192 formed at another end thereof, the cylindrical crimping member 192 being inserted through openings each formed at a first insulating member 211, the opening-sealing plate 13, a second insulating member 212 and the collector 181, and being crimped in a diameter-enlarging direction, so that the sword-guard portion 191 of the external terminal 19, the opening-sealing plate 13 and the collector 181 are mechanically-fixed and a thin-walled portion made thinner than other portions formed in a tip portion of the cylindrical crimping member 192 is adhered to the collector, and the thin-walled portion 194 and the collector being welded with a high energy beam.Type: GrantFiled: September 25, 2008Date of Patent: July 31, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Yasuhiro Yamauchi, Kenji Nansaka, Toshiyuki Nohma
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Patent number: 8216715Abstract: A prismatic battery is provided with a fixing portion composed of projections 29Aa and 29Ba for fixing the position of a flat electrode assembly 11 and a battery outer can 12 by contacting with an insulating sheet 32 on at least one of a positive electrode collector member 16 and a negative electrode collector member 18. The insulating sheet 32 is provided between the projections 29Aa, 29Ba and the battery outer can 12. Tips 29Ab and 29Bb of the projections 29Aa and 29Ba project from the flat electrode assembly 11 towards the battery outer can 12 side. The height of the projections is smaller than the thickness of the insulating sheet 32. This prevents short-circuiting between the positive electrode collector member or the negative electrode collector member, and the battery outer can. Thus, a prismatic battery suitable for EVs and HEVs with excellent safety can be obtained.Type: GrantFiled: May 28, 2009Date of Patent: July 10, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Kenji Nansaka, Yasuhiro Yamauchi
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Patent number: 7887946Abstract: A prismatic battery according to one embodiment of the present invention includes a flat electrode group 10 stacked or rolled by mutually positive and negative electrodes with a separator therebetween, a pressing plate 13A, a current collecting body 18A or 18B and a plurality of exposed sections 16, at least one end of the positive and negative electrodes substrates in a width direction being uncoated with a positive or negative electrode mixture. The pressing plate 13A is welded to the exposed sections 16. The pressing plate 13A includes opposing surfaces with a space therebetween provided by folding back a metal plate, and includes a slit 15 along a folded back section at least to one of the opposing surface's side. The exposed sections 16 are inserted into a gap of the pressing plate 13A, and the exposed sections 16 and the pressing plate 13A are welded by a high energy beam from a transverse direction through the slit 15.Type: GrantFiled: November 20, 2006Date of Patent: February 15, 2011Assignee: Sanyo Electric Co., Ltd.Inventors: Yasuhiro Yamauchi, Kenji Nansaka, Naoya Nakanishi, Toshiyuki Nohma
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Publication number: 20100316906Abstract: The prismatic cell of the present invention includes a rectangular outer can having a mouth portion at the top, a sealing plate that seals the mouth portion, and a positive terminal and a negative terminal that protrude from the sealing plate in a state of insulation from the sealing plate, the side faces and bottom faces of the rectangular outer can being covered by a bottomed rectangular tubular holder made of rubber. Thereby, it is possible to provide with ease a packed battery in which short-circuiting between the interconnected prismatic cells can be more reliably prevented, and to provide a prismatic cell which is optimal for use in the battery of an electric vehicle (EV), a hybrid electric vehicle (HEV), or the like.Type: ApplicationFiled: June 4, 2010Publication date: December 16, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenji Nansaka, Yasuhiro Yamauchi
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Publication number: 20100304214Abstract: The sealed battery 10 includes an electrolyte pour hole 15 passing through the sealing plate 12; a rivet 16 having a shank part 16a, a flange part 16b covering a peripheral surface of the electrolyte pour hole 15, and a crimping part 16c in the electrolyte pour hole 15; and a gasket 18 interposed between the electrolyte pour hole 15 and the rivet 16 and adhering to the peripheral surface of the electrolyte pour hole 15 and to a back side of the flange part 16b of the rivet 6; on the peripheral surface of the electrolyte pour hole 15, an inner annular first convex part 17a and an outer annular second convex part 17b are formed; and on the back side of the flange part 16b of the rivet 16, an annular third convex part 16d is formed so as to be superimposed over the second convex part 17b.Type: ApplicationFiled: May 13, 2010Publication date: December 2, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yusuke ITOH, Kenji NANSAKA, Yasuhiro YAMAUCHI
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Patent number: 7819929Abstract: The present invention's manufacturing method for a sealed battery includes: a process whereby a sealed battery application electrode assembly 11 is formed that has multiple positive electrode substrate exposed portions 14 at one end and multiple negative electrode substrate exposed portions 15 at the other end; a process whereby the negative electrode collector 181 and negative electrode collector receiving part 183 are brought against both surfaces of the part to be welded on at least the negative electrode substrate exposed portions 15, with tape 23a constituted of thermodeposited resin and having an opening 231 in the center being interposed; and a process whereby resistance welding is effected by passing current between the negative electrode collector 181 and negative electrode collector receiving part 183 positioned at the two sides.Type: GrantFiled: June 24, 2008Date of Patent: October 26, 2010Assignee: Sanyo Electric Co., LtdInventors: Kenji Nansaka, Yasutomo Taniguchi, Yasuhiro Yamauchi, Toshiyuki Nohma, Kenji Inagaki, Satoshi Yoshida, Takashi Kondou
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Publication number: 20100233529Abstract: The sealed battery includes a sealing plate 13 sealing a mouth of an outer can, an external terminal 16 attached to the sealing plate 13 and having a connecting terminal 23, and a current interruption mechanism 18 interrupting current in response to pressure increase in the outer can that is installed in a conductive pathway electrically connecting the connecting terminal 23 and an electrode assembly. In the connecting terminal 23, a through-hole 23b continuing to the space on the current interruption mechanism 18 at the side corresponding to the outside of the battery is formed. The through-hole 23b is sealed with a terminal stopper 30 made of an elastic member so as to form a closed space between the terminal stopper 30 and current interruption mechanism 18. An electrolyte or washing solution hardly enters the current interruption mechanism during the manufacture can be provided.Type: ApplicationFiled: February 24, 2010Publication date: September 16, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenji Nansaka, Yasuhiro Yamauchi, Toshiyuki Nohma
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Publication number: 20100223780Abstract: A method for producing a prismatic secondary cell housing a flat electrode assembly includes disposing a first current-collecting member onto a first to-be-welded portion at a flat portion of an edge of the electrode assembly where a core-body exposed portion of the first electrode protrudes. A first receiving member is disposed onto a plane opposing the flat portion. The first current-collecting member, the core-body exposed portion, and the first receiving member are resistive-welded with the core-body exposed portion between the other members. A second current-collecting member is disposed onto a second to-be-welded portion at a position of the flat portion distanced from the first to-be-welded portion while avoiding contact between the collecting members. A conductive connecting member is placed between the collecting members or between the receiving members. The conductive connecting member and its abutting members are welded. One of the members is electrificably connected to an external output terminal.Type: ApplicationFiled: March 5, 2010Publication date: September 9, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takashi Kondou, Hironobu Aratani, Kenji Inagaki, Yukio Asayama, Yasuhiro Yamauchi, Kenji Nansaka
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Publication number: 20100221602Abstract: A method for manufacturing a sealed battery 10 includes a step of bringing into contact a collector 18 and collector receiving part 25 having hemispherical protrusions 18a and 25a, respectively, with both sides of at least one of the plurality of positive electrode substrate exposed portions 14 and the plurality of negative electrode substrate exposed portions 15 so that the collector 18 and collector receiving part 25 oppose each other, where the displacement between central axes of the hemispherical protrusions 18a and 25a is not more than ½ of the diameter of the hemispherical protrusions 18a and 25a, and a step of resistance-welding between the collector 18 and collector receiving part 25 by applying current under a pressure. According to the method, the collector and collector receiving part can be reliably resistance-welded to the substrates.Type: ApplicationFiled: February 26, 2010Publication date: September 2, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yusuke Itou, Kenji Nansaka, Yasuhiro Yamauchi, Toshiyuki Nohma
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Publication number: 20100081048Abstract: A negative electrode terminal 19 and a positive electrode terminal 18 of a prismatic secondary battery 12 of the present invention are provided with terminal plates 20A and 20B, respectively, that are electrically connected to a negative electrode plate and a positive electrode plate, respectively, and with insulating materials 21A and 21B, respectively, that electrically insulate the terminal plates 20A and 20B, respectively, from a sealing plate 17. The insulating materials 21A and 21B are provided with connecting portions 24A and 24B, respectively, that are formed with connection contact portions composed of recessed portions 27 and protruding portions 31, respectively, having shapes complementary with each other. According to the prismatic battery 12 of the invention, any number of the batteries can easily be connected without a mistake in polarity to obtain a modularized battery.Type: ApplicationFiled: September 24, 2009Publication date: April 1, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenji Nansaka, Yasuhiro Yamauchi
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Publication number: 20090297940Abstract: A prismatic battery is provided with a fixing portion composed of projections 29Aa and 29Ba for fixing the position of a flat electrode assembly 11 and a battery outer can 12 by contacting with an insulating sheet 32 on at least one of a positive electrode collector member 16 and a negative electrode collector member 18. The insulating sheet 32 is provided between the projections 29Aa, 29Ba and the battery outer can 12. Tips 29Ab and 29Bb of the projections 29Aa and 29Ba project from the flat electrode assembly 11 towards the battery outer can 12 side. The height of the projections is smaller than the thickness of the insulating sheet 32. This prevents short-circuiting between the positive electrode collector member or the negative electrode collector member, and the battery outer can. Thus, a prismatic battery suitable for EVs and HEVs with excellent safety can be obtained.Type: ApplicationFiled: May 28, 2009Publication date: December 3, 2009Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenji Nansaka, Yasuhiro Yamauchi
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Publication number: 20090087736Abstract: A sealed battery including: an electrode assembly 11 having multiple positive electrode substrates exposed at one end and negative electrode substrates exposed at the other end; and collectors 181 and collector receiving parts 183 that are resistance-welded on both sides of the multiple positive or the multiple negative electrode substrates or both, grooves 23 being formed around the resistance-welded portion of at least one of the collector 181 and the collector receiving part 183. Due to the spattered particles 26 generated during the resistance-welding being captured within the grooves 23, few particles burst into the inside of the electrode assembly 11 or into the outside.Type: ApplicationFiled: September 25, 2008Publication date: April 2, 2009Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yasutomo TANIGUCHI, Kenji Nansaka, Yasuhiro YAMAUCHI, Toshiyuki NOHMA
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Publication number: 20090087737Abstract: The external terminal 19 has sword-guard portion 191 provided with a terminal portion 193 formed at one end thereof and a cylindrical crimping member 192 formed at another end thereof, the cylindrical crimping member 192 being inserted through openings each formed at a first insulating member 211, the opening-sealing plate 13, a second insulating member 212 and the collector 181, and being crimped in a diameter-enlarging direction, so that the sword-guard portion 191 of the external terminal 19, the opening-sealing plate 13 and the collector 181 are mechanically-fixed and a thin-walled portion made thinner than other portions formed in a tip portion of the cylindrical crimping member 192 is adhered to the collector, and the thin-walled portion 194 and the collector being welded with a high energy beam.Type: ApplicationFiled: September 25, 2008Publication date: April 2, 2009Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yasuhiro Yamauchi, Kenji Nansaka, Toshiyuki Nohma
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Publication number: 20090004561Abstract: The present invention's manufacturing method for a sealed battery includes: a process whereby a sealed battery application electrode assembly 11 is formed that has multiple positive electrode substrate exposed portions 14 at one end and multiple negative electrode substrate exposed portions 15 at the other end; a process whereby the negative electrode collector 181 and negative electrode collector receiving part 183 are brought against both surfaces of the part to be welded on at least the negative electrode substrate exposed portions 15, with tape 23a constituted of thermodeposited resin and having an opening 231 in the center being interposed; and a process whereby resistance welding is effected by passing current between the negative electrode collector 181 and negative electrode collector receiving part 183 positioned at the two sides.Type: ApplicationFiled: June 24, 2008Publication date: January 1, 2009Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenji Nansaka, Yasutomo Taniguchi, Yasuhiro Yamauchi, Toshiyuki Nohma, Kenji Inagaki, Satoshi Yoshida, Takashi Kondou