Patents by Inventor Toshie Wata
Toshie Wata 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: 20230006259Abstract: Positive and negative electrode plates of a battery include positive electrode units aligned and connected to one another and negative electrode units aligned and connected to one another, respectively. The electrode plates are folded, in a zigzag pattern, alternately in opposite directions at fold portions each being a boundary between corresponding adjacent two positive electrode units and at fold portions each being a boundary between corresponding adjacent two negative electrode units. The electrode plates and a separator are arranged such that an active material layer on the positive electrode units faces an active material layer on the negative electrode units across the separator, and the fold portions face the fold portions across the separator. The length of each positive electrode unit is greater than the length of each negative electrode units in a direction in which the electrode units are aligned, respectively.Type: ApplicationFiled: December 8, 2020Publication date: January 5, 2023Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Jun Kumagai, Toshie Wata
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Patent number: 10587004Abstract: A nonaqueous electrolyte battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and negative electrode, and a nonaqueous electrolyte. The positive electrode includes vanadium pentoxide, a first carbon black, and a first binder. The negative electrode includes a silicon-containing material, graphite, a second carbon black, and a second binder. When the battery voltage is 0 V, the potential of each of the positive electrode and negative electrode is 2.5 to 3.5 V versus metal lithium.Type: GrantFiled: October 21, 2016Date of Patent: March 10, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tadayoshi Takahashi, Tomohiro Yagishita, Toshie Wata
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Publication number: 20180358650Abstract: A nonaqueous electrolyte battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and negative electrode, and a nonaqueous electrolyte. The positive electrode includes vanadium pentoxide, a first carbon black, and a first binder. The negative electrode includes a silicon-containing material, graphite, a second carbon black, and a second binder. When the battery voltage is 0 V, the potential of each of the positive electrode and negative electrode is 2.5 to 3.5 V versus metal lithium.Type: ApplicationFiled: October 21, 2016Publication date: December 13, 2018Inventors: TADAYOSHI TAKAHASHI, TOMOHIRO YAGISHITA, TOSHIE WATA
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Patent number: 9508984Abstract: A coin-type lithium secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode active material including a silicon alloy material, a conductive agent including a carbon material, and a binder. The silicon alloy material includes a phase A including a lithium-silicon alloy and a phase B including an intermetallic compound of a transition metal element and silicon. In the lithium-silicon alloy, a ratio of lithium atoms relative to silicon atoms is 2.75 to 3.65 in a 100% state-of-charge.Type: GrantFiled: September 15, 2010Date of Patent: November 29, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Toshie Wata, Tadayoshi Takahashi
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Patent number: 9490479Abstract: Provided is a non-aqueous electrolyte battery excellent in initial static characteristics and continuous charge characteristics. The non-aqueous electrolyte battery includes a pellet-shaped positive electrode, a pellet-shaped negative electrode, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active material, aluminum powder, a conductive agent, and a binder. The positive electrode active material contains vanadium pentoxide. The positive electrode has a porosity of 35.6 to 45.4 vol %. The negative electrode includes a negative electrode active material containing silicon, a conductive agent, and a binder.Type: GrantFiled: March 19, 2013Date of Patent: November 8, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Toshie Wata, Tadayoshi Takahashi
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Publication number: 20150017540Abstract: Provided is a non-aqueous electrolyte battery excellent in initial static characteristics and continuous charge characteristics. The non-aqueous electrolyte battery includes a pellet-shaped positive electrode, a pellet-shaped negative electrode, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active material, aluminum powder, a conductive agent, and a binder. The positive electrode active material contains vanadium pentoxide. The positive electrode has a porosity of 35.6 to 45.4 vol %. The negative electrode includes a negative electrode active material containing silicon, a conductive agent, and a binder.Type: ApplicationFiled: March 19, 2013Publication date: January 15, 2015Applicant: PANASONIC CORPORATIONInventors: Toshie Wata, Tadayoshi Takahashi
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Patent number: 8778544Abstract: Disclosed is a battery with terminal, including a power generating element and a housing can accommodating the power generating element. The power generating element includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The negative electrode includes a material mixture including a negative electrode active material and a binder. The negative electrode active material contains an amorphous Si phase, and the binder includes a polyacrylic acid. The non-aqueous electrolyte includes a non-aqueous solvent, and a lithium salt dissolved in the non-aqueous solvent, and the non-aqueous solvent contains vinylethylene carbonate. The housing can has at least one lead terminal welded thereto. The molar ratio of the vinylethylene carbonate to the amorphous Si phase in the negative electrode active material is 0.09 to 0.17.Type: GrantFiled: March 9, 2012Date of Patent: July 15, 2014Assignee: Panasonic CorporationInventors: Toshie Wata, Tadayoshi Takahashi
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Publication number: 20130089776Abstract: Disclosed is a battery with terminal, including a power generating element and a housing can accommodating the power generating element. The power generating element includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The negative electrode includes a material mixture including a negative electrode active material and a binder. The negative electrode active material contains an amorphous Si phase, and the binder includes a polyacrylic acid. The non-aqueous electrolyte includes a non-aqueous solvent, and a lithium salt dissolved in the non-aqueous solvent, and the non-aqueous solvent contains vinylethylene carbonate. The housing can has at least one lead terminal welded thereto. The molar ratio of the vinylethylene carbonate to the amorphous Si phase in the negative electrode active material is 0.09 to 0.17.Type: ApplicationFiled: March 9, 2012Publication date: April 11, 2013Applicant: PANASONIC CORPORATIONInventors: Toshie Wata, Tadayoshi Takahashi
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Publication number: 20120315543Abstract: A coin-type lithium secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode active material including a silicon alloy material, a conductive agent including a carbon material, and a binder. The silicon alloy material includes a phase A including a lithium-silicon alloy and a phase B including an intermetallic compound of a transition metal element and silicon. In the lithium-silicon alloy, a ratio of lithium atoms relative to silicon atoms is 2.75 to 3.65 in a 100% state-of-charge.Type: ApplicationFiled: September 15, 2010Publication date: December 13, 2012Inventors: Toshie Wata, Tadayoshi Takahashi