Patents by Inventor Yasuaki Murashi

Yasuaki Murashi 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).

  • Publication number: 20210184267
    Abstract: According to one embodiment, a battery includes an external container, an electrode group, and a sealing plate. The electrode group includes a positive electrode and a negative electrode wound in a flat shape with an insulating layer interposed therebetween. Thicknesses TE of the positive and negative electrodes are each from 0.03 mm to 0.08 mm. A first direction is orthogonal to a winding axis direction of the electrode group. A second direction is parallel to the winding axis direction. The thicknesses TE of each electrode, a thickness TW of the electrode group in the third direction orthogonal to the first and second directions, and an innermost circumferential height HIC of the electrode group in the first direction satisfy 0.02?(TE×TW)/HIC?0.04.
    Type: Application
    Filed: February 16, 2021
    Publication date: June 17, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masanori TANAKA, Tatsuya SHINODA, Yasuaki MURASHI, Makoto KOBAYASHI, Koichi TAKESHITA, Masahiro MURATA
  • Publication number: 20210135320
    Abstract: According to an embodiment, a battery is provided. The battery includes a first lead clamping a current-collecting tab wound into multiple layers. The first lead includes: a joint plate portion electrically connected to the second lead; and a cover plate portion opposing the joint plate portion with the current-collecting tab wound into multiple layers interposed therebetween. The cover plate portion includes a first plate portion and a second plate portion extending continuously from the first plate portion. The second plate portion includes a protrusion protruding relative to the first plate portion along a direction in which the second lead extends. The protrusion is curved toward at least one end of the wound electrode group.
    Type: Application
    Filed: January 5, 2021
    Publication date: May 6, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masahiro MURATA, Yasuaki MURASHI, Tatsuya SHINODA
  • Publication number: 20200411910
    Abstract: A secondary battery according to an embodiment includes an exterior material including an opening portion and including a bottom, a wound electrode group housed in the exterior material in order for an insertion direction to be perpendicular to a winding axis, and a lid attached to the opening portion of the exterior material and including at least a plate-like member, a positive electrode terminal, and a negative electrode terminal. When a minimum distance between the lid and the wound electrode group is AMIN, 0.5 mm<AMIN<2.0 mm is satisfied.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuaki MURASHI, Masahiro MURATA, Tatsuya SHINODA
  • Publication number: 20200411853
    Abstract: According to a first embodiment, there is provided a positive electrode including a positive electrode active material-containing layer containing a first active material having a spinel type crystal structure. The positive electrode satisfies the formulas (1) to (3) when combined with a negative electrode including a negative electrode active material-containing layer containing a first active material having a spinel type crystal structure: 0.5?a1/b1?1.5 (1); 0.4?a2/b2?1.4 (2); and 0.5?a3/b3?2.3 (3), where a1 and b1 are a pore volume per 1 g weight, a2 and b2 are a pore specific surface area, and a3 and b3 are a median diameter in pore distribution, for the positive and negative electrode active material-containing layers, respectively.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hikaru YOSHIKAWA, Akira YAJIMA, Yasuaki MURASHI, Naoki NISHIO, Kazuhiro NAMBA, Natsuki NAKAMURA
  • Patent number: 10559806
    Abstract: According to one embodiment, a battery is provided. The battery includes an electrode body, a lead, a container member, and a terminal. The container member includes a main part and a terminal-connecting part adjacent to the main part. The electrode body is housed in the main part of the container member. The lead is electrically connected to the electrode body. The lead is housed in the terminal-connecting part of the container member. The terminal is electrically connected to the lead. The terminal is provided on the terminal-connecting part. A thickness of the main part of the container member is larger than a thickness of the terminal-connecting part of the container member.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: February 11, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Nobuyasu Negishi, Tatsuya Hashimoto, Naoki Iwamura, Tatsuya Shinoda, Koichi Takeshita, Yasuaki Murashi
  • Patent number: 10522812
    Abstract: According to one embodiment, a battery is provided. The battery includes an electrode body, a lead, a container member, and a terminal. The container member includes a main part and a terminal-connecting part adjacent to the main part. The electrode body is housed in the main part of the container member. The lead is electrically connected to the electrode body. The lead is housed in the terminal-connecting part of the container member. The terminal is electrically connected to the lead. The terminal is provided on the terminal-connecting part. A thickness of the main part of the container member is larger than a thickness of the terminal-connecting part of the container member.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: December 31, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Nobuyasu Negishi, Tatsuya Hashimoto, Naoki Iwamura, Tatsuya Shinoda, Koichi Takeshita, Yasuaki Murashi
  • Patent number: 10505233
    Abstract: According to an embodiment, an electrode is provided. The electrode group includes a stack. The stack includes a positive electrode, a negative electrode or negative electrodes, and separator. Each negative electrode includes a negative electrode current collector and a negative electrode layer provided on the negative electrode current collector. The electrode group satisfies following relational formulae (I) to (III): 10?a1/b1?16 (I); 0.7?D1/E1?1.4 (II); E1?85 (III). Here, the a1 [mm] is a thickness of the stack. The b1 [mm] is a thickness of the negative electrode current collector, or is a total thickness of the negative electrode current collectors. The D1 [?m] is a thickness of the positive electrode. The E1 [?m] is a thickness of the negative electrode.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: December 10, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuaki Murashi, Nobuyasu Negishi, Tatsuya Shinoda, Koichi Takeshita, Koichi Kawamura, Tatsuya Hashimoto
  • Patent number: 10418612
    Abstract: A secondary battery according to one embodiment includes, an electrode group which is a cathode and an anode wound with a separator being interposed therebetween, a first lead having a first welding surface, a second lead having a second welding surface which is bent with respect to a winding axial direction of the electrode group, a first current collecting tab which is extended from one end of the electrode group on the winding axial direction, and welded onto the first welding surface of the first lead, a second current collecting tab which is extended from the other end of the electrode group on the winding axial direction, and welded onto the second welding surface of the second lead, a first terminal connected to the first lead, and a second terminal connected to the second lead.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: September 17, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuya Shinoda, Tatsuya Hashimoto, Koichi Kawamura, Nobuyasu Negishi, Koichi Takeshita, Yasuaki Murashi
  • Patent number: 9979020
    Abstract: According to one embodiment, a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte is provided. The positive electrode includes an active material including Li1?xMn2?y?zAlyMzO4 (?0.1?x?1, 0.20?y?0.35, 0?z?0.1, M is at least one metal selected from Mg, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, and Sn). The negative electrode includes an active material including a first oxide represented by Li4+aTi5O12 (?0.5?a?3) and a second oxide of at least one element selected from Al, Co, Cr, Cu, Fe, Mg, Ni, Zn, and Zr. The second oxide is included in an amount of from 300 ppm to 5000 ppm relative to a weight of the first oxide.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: May 22, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hidesato Saruwatari, Hikaru Yoshikawa, Hiromichi Kuriyama, Yasuaki Murashi, Naoki Nishio, Dai Yamamoto
  • Patent number: 9947923
    Abstract: The nonaqueous electrolyte battery according to one embodiment includes a positive electrode and a negative electrode. The positive electrode contains a positive electrode active material containing manganese-containing composite oxide. The negative electrode contains a negative electrode active material selected from the group consisting of titanium oxide and titanium-containing composite oxide. A ratio p/n of a capacity p per unit area of the positive electrode to a capacity n per unit area of the negative electrode is in the range of 0.8 or more and 1 or less.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: April 17, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiromichi Kuriyama, Hikaru Yoshikawa, Hidesato Saruwatari, Yasuaki Murashi, Dai Yamamoto, Naoki Nishio
  • Publication number: 20180102528
    Abstract: According to one embodiment, a battery is provided. The battery includes an electrode body, a lead, a container member, and a terminal. The container member includes a main part and a terminal-connecting part adjacent to the main part. The electrode body is housed in the main part of the container member. The lead is electrically connected to the electrode body. The lead is housed in the terminal-connecting part of the container member. The terminal is electrically connected to the lead. The terminal is provided on the terminal-connecting part. A thickness of the main part of the container member is larger than a thickness of the terminal-connecting part of the container member.
    Type: Application
    Filed: December 8, 2017
    Publication date: April 12, 2018
    Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Nobuyasu NEGISHI, Tatsuya Hashimoto, Naoki Iwamura, Tatsuya Shinoda, Koichi Takeshita, Yasuaki Murashi
  • Patent number: 9711782
    Abstract: According to one embodiment, there is provided a positive electrode including a positive electrode active material-including layer including a positive electrode active material, which includes a lithium-manganese oxide LiMn2-xMxO4, and a conductive agent. In the positive electrode active material-including layer, an average particle diameter d50 is within 2 ?m to 5 ?m, a particle diameter d10 and a particle diameter d90, where a cumulative frequency from a smaller side is, respectively, 10% and 90%, is within 0.5 ?m to 3 ?m and within 4 ?m to 10 ?m, respectively, in a particle size distribution. X, represented by X=(d50?d10) /d50 is within 0.4 to 0.8. Y, represented by Y=(d90?d50)/d90 is within 0.2 to 0.6.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: July 18, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hikaru Yoshikawa, Hiromichi Kuriyama, Yasuaki Murashi, Hidesato Saruwatari, Dai Yamamoto
  • Publication number: 20170179535
    Abstract: According to an embodiment, an electrode is provided. The electrode group includes a stack. The stack includes a positive electrode, a negative electrode or negative electrodes, and separator. Each negative electrode includes a negative electrode current collector and a negative electrode layer provided on the negative electrode current collector. The electrode group satisfies following relational formulae (I) to (III): 10?a1/b1?16 (I); 0.7?D1/E1?1.4 (II); E1?85 (III). Here, the a1 [mm] is a thickness of the stack. The b1 [mm] is a thickness of the negative electrode current collector, or is a total thickness of the negative electrode current collectors. The D1 [?m] is a thickness of the positive electrode. The E1 [?m] is a thickness of the negative electrode.
    Type: Application
    Filed: March 8, 2017
    Publication date: June 22, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuaki MURASHI, Nobuyasu NEGISHI, Tatsuya SHINODA, Koichi TAKESHITA, Koichi KAWAMURA, Tatsuya HASHIMOTO
  • Publication number: 20170018797
    Abstract: According to one embodiment, a nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. When the nonaqueous electrolyte battery is discharged at a constant current of 0.5 C until a voltage becomes 1.5 V, a curve obtained by taking dQ/dV during the discharge as a vertical axis and voltage as a horizontal axis has a first peak and a second peak. The firs peak is a peak that appears within a range of from 2.54 V to 2.65 V, and the second peak is a peak that appears within a range of from 2.4 V to less than 2.54 V. A dQ/dV peak intensity A of the first peak and a dQ/dV peak intensity B of the second peak satisfy 0.8?A/B 1.0.
    Type: Application
    Filed: February 25, 2016
    Publication date: January 19, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuaki MURASHI, Hikaru YOSHIKAWA, Hidesato SARUWATARI, Hiromichi KURIYAMA, Dai YAMAMOTO, Naoki NISHIO, Koichi KAWAMURA
  • Publication number: 20160336576
    Abstract: A secondary battery according to one embodiment includes, an electrode group which is a cathode and an anode wound with a separator being interposed therebetween, a first lead having a first welding surface, a second lead having a second welding surface which is bent with respect to a winding axial direction of the electrode group, a first current collecting tab which is extended from one end of the electrode group on the winding axial direction, and welded onto the first welding surface of the first lead, a second current collecting tab which is extended from the other end of the electrode group on the winding axial direction, and welded onto the second welding surface of the second lead, a first terminal connected to the first lead, and a second terminal connected to the second lead.
    Type: Application
    Filed: July 25, 2016
    Publication date: November 17, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsuya SHINODA, Tatsuya HASHIMOTO, Koichi KAWAMURA, Nobuyasu NEGISHI, Koichi TAKESHITA, Yasuaki MURASHI
  • Publication number: 20160268604
    Abstract: According to one embodiment, a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte is provided. The positive electrode includes an active material including Li1?xMn2?y?zAlyMzO4 (?0.1?x?1, 0.20?y?0.35, 0?z?0.1, M is at least one metal selected from Mg, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, and Sn). The negative electrode includes an active material including a first oxide represented by Li4+aTi5O12 (?0.5?a?3) and a second oxide of at least one element selected from Al, Co, Cr, Cu, Fe, Mg, Ni, Zn, and Zr. The second oxide is included in an amount of from 300 ppm to 5000 ppm relative to a weight of the first oxide.
    Type: Application
    Filed: February 25, 2016
    Publication date: September 15, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hidesato SARUWATARI, Hikaru Yoshikawa, Hiromichi Kuriyama, Yasuaki Murashi, Naoki Nishio, Dai Yamamoto
  • Publication number: 20160240849
    Abstract: The nonaqueous electrolyte battery according to one embodiment includes a positive electrode and a negative electrode. The positive electrode contains a positive electrode active material containing manganese-containing composite oxide. The negative electrode contains a negative electrode active material selected from the group consisting of titanium oxide and titanium-containing composite oxide. A ratio p/n of a capacity p per unit area of the positive electrode to a capacity n per unit area of the negative electrode is in the range of 0.8 or more and 1 or less.
    Type: Application
    Filed: February 23, 2016
    Publication date: August 18, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiromichi KURIYAMA, Hikaru YOSHIKAWA, Hidesato SARUWATARI, Yasuaki MURASHI, Dai YAMAMOTO, Naoki NISHIO
  • Publication number: 20160204417
    Abstract: According to one embodiment, a nonaqueous electrolyte battery is provided. The nonaqueous electrolyte battery includes a positive electrode and a negative electrode. A positive electrode layer contains lithium-manganese composite oxide represented by a general formula of LiMn2-xMxO4. x is within the range of 0.22?x?0.7 and M is at least one element selected from a group consisting of Mg, Ti, Cr, Fe, Co, Zn, Al, and Ga. A negative electrode layer contains lithium titanate. A pore specific surface area of the positive electrode layer is 2 m2/g or more and less than 5 m2/g. A ratio of a capacity per pore surface area of the positive electrode to the negative electrode is within the range of 1 or more and less than 2.4.
    Type: Application
    Filed: February 24, 2016
    Publication date: July 14, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Dai YAMAMOTO, Hikaru Yoshikawa, Hiromichi Kuriyama, Yasuaki Murashi, Hidesato Saruwatari
  • Patent number: 9325031
    Abstract: According to one embodiment, there is provided a battery including a positive electrode, and a negative electrode. The positive electrode contains a lithium-cobalt composite oxide and a lithium-manganese composite oxide. The negative electrode contains a lithium titanium composite oxide. The battery satisfies the following formula (1). In addition, an open circuit voltage (OCV) of the positive electrode when the battery is discharged to 1.8 V at 0.2 C is 3.6 V (Li v.s. Li+) or more. (Qp/Qn)>1.1??(1) Qp is a charge capacity (mAh/m2) of the positive electrode per unit area, and Qn is a charge capacity (mAh/m2) of the negative electrode per unit area.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: April 26, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuaki Murashi, Hidetoshi Watanabe, Koji Takazawa, Yoshinao Tatebayashi
  • Publication number: 20160056450
    Abstract: According to one embodiment, there is provided a positive electrode including a positive electrode active material-including layer including a positive electrode active material, which includes a lithium-manganese oxide LiMn2-xMxO4, and a conductive agent. In the positive electrode active material-including layer, an average particle diameter d50 is within 2 ?m to 5 ?m, a particle diameter d10 and a particle diameter d90, where a cumulative frequency from a smaller side is, respectively, 10% and 90%, is within 0.5 ?m to 3 ?m and within 4 ?m to 10 ?m, respectively, in a particle size distribution. X, represented by X=(d50?d10) /d50 is within 0.4 to 0.8. Y, represented by Y=(d90?d50)/d90 is within 0.2 to 0.6.
    Type: Application
    Filed: March 12, 2015
    Publication date: February 25, 2016
    Inventors: Hikaru YOSHIKAWA, Hiromichi KURIYAMA, Yasuaki MURASHI, Hidesato SARUWATARI, Dai YAMAMOTO