Patents Assigned to PRIMEARTH EV ENERGY CO., LTD.
  • Publication number: 20240421458
    Abstract: An electrolyte supply system for supplying an electrolyte to a use point, includes: a receiving storage tank configured to store the electrolyte that has been delivered; a supply storage tank to which the electrolyte is transferred from the receiving storage tank; a temperature control device configured to control temperatures of the electrolyte in the receiving storage tank and that in the supply storage tank; and a supply pipe that is laid from the supply storage tank to the use point. The electrolyte supply system is highly safe because the storage tanks are disposed in an outdoor location, and furthermore, performs a temperature control process for the receiving storage tank before the electrolyte is transferred to the supply storage tank. Thus, it can supply the electrolyte to the use point 24 hours a day even with little temperature control in the supply storage tank.
    Type: Application
    Filed: December 26, 2022
    Publication date: December 19, 2024
    Applicants: Panasonic Holdings Corporation, PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Hiroki MATSUI, Ryosuke ASAI, Kouji IIDA, Sadaaki SHIMURA
  • Publication number: 20240363890
    Abstract: A lithium-ion rechargeable battery includes an electrode body including a stack of a cathode plate having a cathode mixture layer, an anode plate having an anode mixture layer, and a separator arranged between the anode plate and the cathode plate. A porosity PP of the cathode mixture layer and a porosity NP of the anode mixture layer are set to be greater than a porosity SP of the separator.
    Type: Application
    Filed: April 24, 2024
    Publication date: October 31, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Ryotaro SAKAI, Kentaro SUZUKI
  • Publication number: 20240347734
    Abstract: A positive electrode plate for a lithium-ion rechargeable battery includes a positive electrode mixture layer including a positive electrode active material and a fibrous conductive material dispersed on the positive electrode active material, wherein the fibrous conductive material includes flat flaked aggregates of the fibrous conductive material that do not adhere to the positive electrode active material.
    Type: Application
    Filed: April 15, 2024
    Publication date: October 17, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Kazuya TAGA
  • Publication number: 20240332593
    Abstract: A rechargeable battery includes an electrode body formed by rolling a stack of positive and negative electrode sheets with a separator arranged in between. The positive and negative electrode sheets each include an electrode mixture layer. When a pressure is applied for a predetermined time to the electrode mixture layer, impregnated with an electrolyte solution, a weight of the electrolyte solution that flows out of the electrode mixture layer per unit volume of the electrode mixture layer per unit pressure applied is referred to as a fluidity index value of the electrolyte solution. The predetermined time is set to three minutes. The fluidity index value of the electrolyte solution is expressed as “gram (@three minutes) per kilopascal-cubic millimeter”. A value obtained by subtracting the fluidity index value of the negative mixture layer from the that of the positive mixture layer is greater than or equal to 0.48×10{circumflex over (?)}-6.
    Type: Application
    Filed: March 29, 2024
    Publication date: October 3, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Ryotaro SAKAI, Kentaro SUZUKI
  • Publication number: 20240291045
    Abstract: A non-aqueous rechargeable battery includes an electrode body and a non-aqueous electrolyte solution. The electrode body includes positive and negative electrode plates and a separator. The negative electrode plate includes a substrate and a mixture layer applied to opposite surfaces of the substrate. When A represents a sum of a mass (mg/cm2) of an active material in the mixture layer per unit area on each substrate surface, B represents a lattice volume change amount (nm3) of the active material when the battery is charged from SOC 0% to 100%, C represents a change amount of the load (N) acting on the electrode body if the battery is charged from SOC 0% to 100%, D represents a sum (mm/kN) of a reciprocal of the positive electrode plate spring constant and a reciprocal of the separator spring constant, and E=A×B/(C×D) is satisfied, E is between 0.48 to 0.69, inclusive.
    Type: Application
    Filed: November 24, 2023
    Publication date: August 29, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Takaaki IZUMOTO
  • Publication number: 20240234954
    Abstract: An electrode body includes a stack of a negative electrode plate, a positive electrode plate, and a separator in which the separator is arranged between the negative electrode plate and the positive electrode plate. The positive electrode plate has a positive electrode density of 3.0 g/cm3 or less. The negative electrode plate has a negative electrode density of 1.3 g/cm3 or less. A ratio of a specific surface area of the positive electrode plate to a specific surface area of the negative electrode plate is 0.7 or greater.
    Type: Application
    Filed: October 20, 2023
    Publication date: July 11, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Ryotaro SAKAI
  • Publication number: 20240234736
    Abstract: An electrode mixture including an electrode active material, a conductive fibrous carbon material, and inorganic nanoparticles applied to a surface of the electrode active material. The conductive fibrous carbon material contains magnetic metal. A ratio of coverage of the inorganic nanoparticles covering the surface of the electrode active material to content of the magnetic metal contained in the conductive fibrous carbon material is 38.5 or less.
    Type: Application
    Filed: October 20, 2023
    Publication date: July 11, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Hidenori YOKOO, Ryotaro SAKAI, Nobuaki KOIWA, Kentaro SUZUKI
  • Patent number: 12027726
    Abstract: A secondary battery manufacturing method according to an example embodiment of the present disclosure includes an electromagnetic welding step of joining together a first metallic component and a second metallic component included in the secondary battery by electromagnetic welding, and a laser welding step of applying laser light to weld an unjoined part of the first metallic component and the second metallic component, the unjoined part being not joined by the electromagnetic welding step.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: July 2, 2024
    Assignee: PRIMEARTH EV ENERGY CO., LTD.
    Inventor: Shigeki Saito
  • Publication number: 20240213517
    Abstract: A non-aqueous rechargeable battery includes an electrode body formed by rolling a stack of positive and negative electrode plates with a separator that holds a non-aqueous electrolyte solution disposed in between. The electrode body includes a curved portion in which layers of the electrode body are curved. The positive electrode plate includes a foil of a positive electrode substrate and a positive electrode mixture layer applied to the positive electrode substrate. The negative electrode plate includes a foil of a negative electrode substrate and a negative electrode mixture layer applied to the negative electrode substrate. The negative electrode mixture layer includes a negative electrode active material that intercalates a charge carrier during charging. A coefficient of static friction between the negative electrode mixture layer and the separator is 0.60 or greater. A coefficient of static friction between the positive electrode mixture layer and the separator is 0.50 or less.
    Type: Application
    Filed: December 21, 2023
    Publication date: June 27, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Shunya MARUYAMA
  • Publication number: 20240213447
    Abstract: A positive electrode plate for a non-aqueous electrolyte rechargeable battery includes a positive electrode mixture layer that is formed by a positive electrode mixture including a positive electrode active material and a conductive material. When RS=(RC×BC)/(RA×BA) is satisfied, where RC (mass %) represents a percentage of the conductive material, BC (m2/g) represents a specific surface area of the conductive material, RA (mass %) represents a percentage of the positive electrode active material, BA (m2/g) represents a specific surface area of the positive electrode active material, and RS represents a total surface area ratio, an aspect ratio AR of the conductive material is thirty or greater, the total surface area ratio RS is in a range of 0.20 to 1.93, and a porosity P (%) of the positive electrode mixture layer is in a range of 40% to 55%.
    Type: Application
    Filed: August 7, 2023
    Publication date: June 27, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Shotaro DEGUCHI
  • Publication number: 20240213440
    Abstract: An electrode body for a non-aqueous rechargeable battery includes a positive electrode substrate and a positive electrode mixture layer. A ratio of a specific surface area of the positive electrode plate to a density of the positive electrode mixture layer is 1.0 to 2.0, inclusive. A ratio of a spring constant of the electrode body to the specific surface area of the positive electrode plate is 30 to 80, inclusive.
    Type: Application
    Filed: December 19, 2023
    Publication date: June 27, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Ryotaro SAKAI
  • Publication number: 20240195032
    Abstract: An electrode body includes a substrate serving as a collector, a mixture layer formed on the substrate and containing an electrode active material, and an insulation layer formed on the substrate adjacent to the mixture layer. The insulation layer contains an insulative material. In an interfacial region of the mixture layer and the insulation layer, the mixture layer extends over and overlaps the insulation layer that covers a surface of the substrate. Further, an interfacial surface of the insulation surface interfacing the mixture layer includes undulations having an undulation width that is greater than a particle size of the electrode active material.
    Type: Application
    Filed: December 5, 2023
    Publication date: June 13, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Takashi NAKAZONO
  • Publication number: 20240194892
    Abstract: A non-aqueous electrolyte rechargeable battery includes a positive electrode plate, a negative electrode plate, a separator, and a non-aqueous electrolyte solution. The positive electrode plate includes a current collector, a mixture layer formed on part of at least one surface of the current collector, and an insulating protective layer formed on the at least one surface of the current collector. The insulating protective layer is adjacent to the mixture layer. The insulating protective layer includes an interposed portion located between the mixture layer and the current collector. The insulating protective layer further includes a cavity extending between the interposed portion and the current collector. The cavity is dimensioned to be 3 ?m or greater in a thickness direction of the positive electrode plate and in a range of 5 to 100 ?m, inclusive, in a widthwise direction of the positive electrode plate.
    Type: Application
    Filed: December 5, 2023
    Publication date: June 13, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Kazutaka YOSHIKAWA, Shotaro DEGUCHI, Ryotaro SAKAI
  • Publication number: 20240186626
    Abstract: A battery includes: an outer casing accommodating a power generating element; and a terminal member connected thereto and having a terminal surface exposed outside the outer casing. The battery further includes a conductive closing member formed with a through hole for the terminal member, and an insulating sealing resin member closing a gap between the closing member and the terminal member over the entire perimeter of the through hole. The outer surface of the sealing resin member outside the closing member is defined by an outward-facing portion connected to the terminal member and a sloped portion continuous with and more steeply sloped than the outward-facing portion to have a height from an outer surface of the closing member, smaller toward a farther side from the terminal member. Those outward-facing portion and sloped portion are provided outside an outer edge of the terminal surface over the entire perimeter thereof.
    Type: Application
    Filed: October 18, 2023
    Publication date: June 6, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, Prime Planet Energy & Solutions, Inc.
    Inventors: Shigeru MATSUMOTO, Yozo UCHIDA, Tsuyoshi EHARA, Yuki SATO
  • Patent number: 12002942
    Abstract: A method for manufacturing a rechargeable battery includes forming a mixture layer and an insulating layer on an electrode substrate having an edge extending in a specified direction so that an exposed portion where the electrode substrate is exposed extends between the edge and the insulating layer; pressing the mixture layer; and stretching an extension portion, located between the edge and the mixture layer, and the insulating layer in the specified direction. The stretching includes applying a stress greater than or equal to yield stress of the electrode substrate or greater than or equal to 0.2% proof stress of the electrode substrate and less than tensile strength of the electrode substrate to the extension portion, and applying a stress greater than or equal to yield stress of the insulating layer or greater than or equal to 0.2% proof stress of the insulating layer to the insulating layer.
    Type: Grant
    Filed: November 30, 2022
    Date of Patent: June 4, 2024
    Assignees: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Masakazu Umehara, Naomichi Ishikawa, Naoto Ooshiro, Yuuki Kudou, Hideki Hayashi, Hiroki Yamada, Naoya Kishimoto
  • Patent number: 12002934
    Abstract: A rechargeable battery state determination method determines whether a rechargeable battery is in a micro-short-circuit-prone state, which is a state that is highly likely to form a micro-short circuit.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: June 4, 2024
    Assignee: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Tamotsu Fukuma, Hitoshi Suzuki, Daisuke Koba
  • Publication number: 20240178439
    Abstract: In an insulating protective layer formed on each of two opposite surfaces of a positive electrode connection portion, a yield stress X (N) of a positive electrode plate is set such that “X?0.122 N” is satisfied. “MIN?0.0372 N” is satisfied, where MIN (N) represents a flexural strength of the positive electrode plate including only an inner insulating protective layer formed on a surface of the positive electrode connection portion that is located toward a positive electrode current collector in a stacking direction of an electrode body.
    Type: Application
    Filed: November 21, 2023
    Publication date: May 30, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Shota UCHIYAMA
  • Publication number: 20240170745
    Abstract: A state determination device for a lithium-ion rechargeable battery includes a storage device and an execution device. The storage device stores deposition determination mapping data for defining a deposition determination mapping that uses a difference variable as an input variable and outputs information on whether lithium is deposited on a negative electrode of the lithium-ion rechargeable battery. The difference variable indicate information on a difference between a surface concentration of the negative electrode active material and an average concentration of the negative electrode active material in the lithium-ion rechargeable battery. The execution device is configured to execute a determination acquisition process for acquiring a value of the input variable of the deposition determination mapping, and a determination process for determining deposition of lithium by inputting the value of the input variable of the deposition determination mapping to the deposition determination mapping.
    Type: Application
    Filed: November 17, 2023
    Publication date: May 23, 2024
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventor: Erika YAMAMOTO
  • Publication number: 20240162499
    Abstract: A method for manufacturing a lithium-ion rechargeable battery includes manufacturing a positive electrode plate that includes a positive electrode mixture layer containing a positive electrode active material, lithium hydroxide, and lithium acetate; manufacturing a negative electrode plate that includes a negative electrode mixture layer containing a negative electrode active material and a sodium salt; and injecting a non-aqueous electrolyte solution including LiBOB into a case that accommodates the positive and negative plates. When “A” represents a mole number of the lithium hydroxide added in the manufacturing the positive electrode plate, “B” represents a mole number of the lithium acetate formed in the manufacturing the positive electrode plate, and “C” represents a mole number of the sodium salt added in the manufacturing the negative electrode plate, 0.04?B/A?0.06 and 1.9?B/C are satisfied. Lithium acetate has a higher solubility in the non-aqueous electrolyte solution than sodium acetate.
    Type: Application
    Filed: November 10, 2023
    Publication date: May 16, 2024
    Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Masumi TANIMOTO, Shotaro DEGUCHI
  • Publication number: 20240158195
    Abstract: In a manufacturing process of a battery or a circuit board, or a printing process, there is a case where a long sheet material is conveyed from an unwinding unit to a winding unit. One object of the present disclosure is to provide a technique capable of preventing the long sheet material from being rubbed by a roller when the material is conveyed. The present disclosure relates to a conveyor adapted for a battery manufacturing process. The conveyor comprises a roller configured to convey a long sheet material, a shaft through the roller; a bearing installed between the roller and the shaft, and a driver configured to rotate the shaft in the same direction as a rotating direction of the roller conveying the long sheet material.
    Type: Application
    Filed: October 16, 2023
    Publication date: May 16, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIMEARTH EV ENERGY CO., LTD., PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Taichi URAKAMI, Seiji ISHIZU, Masakazu UMEHARA, Naohiro ISHIZUKA, Naoya KISHIMOTO