Toyota Jidosha Kabushiki Kaisha

Sumitomo Metal Mining Company, Ltd.

Denso Corporation

Tomoyoshi Ueki

Harunari Shimamura

Yusuke Fukumoto

Yukihiro Okada

Koji Takahata

Hideaki Fujita

Yasuhide Kurimoto

Ryuichi Kuzuo

Koji Kawamoto

Yasuyuki Tamane

Manabu Yamada

Hiroshi Yamasaki

Naoyuki Wada

Masaya Takahashi

Yutaka Oyama

Katsuya Kase

Yoshiyuki Ozaki

Satoru Suzuki

Takuichi Arai

Masato Hozumi

Syuhei Oda

Masahiro Kagami

Kazuhiro Ohkawa

Yoshihiko Endo

Koji Hetsugi

Hiroe Takenaka

Kenji Zaitsu

Koichi Yokoyama

Mariko Sumi

Mika Okubo

Syuuhei Oda

Yuko Terasawa

A vehicle management method includes: obtaining first SOH information that indicates a degree of deterioration of a power storage device of a vehicle based on charge data on the power storage device measured while the vehicle is executing external charge of the power storage device using power supplied externally; obtaining second SOH information that indicates the degree of deterioration of the power storage device based on history data about deterioration of the power storage device recorded in the vehicle when the vehicle is not executing external charge of the power storage device; and determining whether the history data have been tampered with by comparing the first SOH information and the second SOH information.

Vehicle management method, vehicle management system, and computer system

A data management system includes a data management device and an arithmetic device. The data management device is configured to acquire battery data and store, in a distributed ledger, transaction data including information on the acquired battery data. The arithmetic device is configured to acquire the battery data from the data management device and calculate an index using the battery data and a predetermined arithmetic formula. The arithmetic device is configured to offer the index to a disclosure server.

Data management system, disclosure server, and method used therein

The present invention provides an optimal non-aqueous electrolyte secondary battery having high durability against high rate charging and discharging and excellent safety. The non-aqueous electrolyte secondary batteryaccording to the present invention comprises a positive electrode, a negative electrodeand a separatorwhich is interposed between the positive electrodeand the negative electrode. The separatorhas a two-layer structure which is composed of a porous polyethylene layermainly composed of polyethylene, and a porous polymer layermainly composed of a polymer having higher oxidation resistance than that of the polyethylene, and an inorganic filler layerincluding an inorganic filler and a binder is formed on the surface of the polyethylene layeron which the porous polymer layeris not formed.

Non-aqueous electrolyte secondary battery

A battery includes a flat wound electrode body formed by winding a positive electrode sheet and a negative electrode sheet with a separator interposed therebetween into a flat shape. The separator has an outer edge adjacent portion adjacent to either an outer edge of a positive electrode active material layer or an outer edge of a negative electrode active material layer. In a curve positioned portion disposed at least in a curved portion of the flat wound electrode body, the outer edge adjacent portion has a suppression portion for suppressing the occurrence or development of a crack.

Battery

A nonaqueous electrolyte secondary batteryaccording to the present invention is provided with an electrode assemblyhaving a structure in which a positive electrodeand a negative electrodeare stacked with a separatorinterposed therebetween. A porous filler layeris formed between the positive electrodeand the separator. The filler layercontains a filler made of an inorganic material and contains a binder. The relationship T&#x3e;D holds where T is the average thickness of the filler layerand D is the average particle diameter of a positive electrode active materialpresent in the positive electrodefacing the filler layer, and a pressure applied to the electrode assemblyin the stacking direction is set to at least 0.1 MPa.

Nonaqueous electrolyte secondary battery

The nonaqueous electrolyte secondary battery of the present invention has a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte solution. The battery further has a porous heat-resistant layer provided between the separator and at least one of the positive electrode and the negative electrode, wherein the porous heat-resistant layer includes an inorganic filler and a binder. The inorganic filler included in the porous heat-resistant layer has a particle size distribution with two peaks, which are a first peak (P) at a relatively small particle diameter and a second peak (P) at a relatively large particle diameter. When the particle diameter of the first peak (P) is Dbe and the particle diameter of the second peak (P) is Dbeing, the peak particle diameter ratio D/Dsatisfies the condition 0.2&#x2266;D/D&#x2266;0.7.

Provided is a very safe secondary battery that can prevent the occurrence of battery abnormalities even when the internal battery temperature increases due to, for example, overcharging. A separatorin this secondary battery has a laminated structure that is provided with at least two porous layersA,B, wherein one of these layers forms a porous electroconductive layerin which an electroconductive materialis dispersed in the porous layer.

Secondary battery including separator containing electroconductive porous layer sandwiched between electroconductive material-free porous layers

A nonaqueous electrolyte secondary batteryaccording to this invention includes a positive electrode, a negative electrode, a separatorinterposed between the positive electrodeand the negative electrode, and a nonaqueous electrolyte solution. A porous heat-resistant layeris additionally provided between the separatorand at least one electrode from among the positive electrodeand the negative electrode. The porous heat-resistant layerincludes hollow particlesmade of an inorganic material, and a binder

A non-aqueous electrolyte secondary battery obtained by the present invention is a non-aqueous electrolyte secondary battery including an electrode body having a positive electrode sheet and a negative electrode sheetstacked via a separator sheet. A porous layerhaving filler particlesand a binder is formed between the separator sheetand at least one of the positive electrode sheet and the negative electrode sheet. The median value in the circularity distribution of the filler particlescontained in the porous layeris 0.85 to 0.97.

Non-aqueous electrolyte secondary battery including a porous layer having filler particles and method of making thereof

A lithium ion secondary battery includes a flat wound electrode body including a positive electrode sheet and a negative electrode sheet that are wound while interposing therebetween separators into a flat shape, and a battery case. In the flat wound electrode body, a central portion has a more constricted shape than end portions by pressing toward a winding axis in a short-side direction and each end portion includes an end-portion positive electrode sheet, an end-portion negative electrode sheet, and end-portion separators, and a core member arranged more inward than them. With tensile forces generated by pressing of the central portion in a central-portion positive electrode sheet, central-portion negative electrode sheet, and central-portion separators, the end-portion positive electrode sheet, end-portion negative electrode sheet, and end-portion separators are in pressure contact with each other and press the outer surfaces of the core member.

Lithium ion secondary battery, vehicle, and battery mounting device

The nonaqueous electrolyte secondary batteryaccording to the present invention is provided with a wound electrode assembly in which a positive electrode sheet and a negative electrode sheet are wound, with a porous separator sheetinterposed therebetween. A filler layercomprising an inorganic filler and a binder is formed on one side of the separator sheet. The filler layeris continuously provided from the winding start endA to the winding finish endB of the separator sheetin the winding direction of this sheet. The separator sheethas low porosity regionsA,B, which have a lower porosity than a locationoutside these regions, in regions having prescribed width W, Wfrom the winding start endA and/or the winding finish endB of the sheet toward the center of the sheet.

The present invention provides a non-aqueous electrolyte secondary battery with great high-rate discharge properties while being less susceptible to an extensive internal short circuit and likely to provide proper assembly. The non-aqueous electrolyte secondary battery comprises a separator () placed between a positive electrode and a negative electrode. Separator () comprises a porous resin layer (), and a porous heat-resistant layer () overlaid at least on a first face of resin layer (). Heat-resistant layer () comprises a filler consisting of an inorganic material, and a binder. Heat-resistant layer () has a porosity of 55% or higher. Heat-resistant layer () exhibits a 90&#xb0; peel strength of 2.9 N/m to 15.1 N/m to the resin layer ().

Non-aqueous electrolyte secondary battery and vehicle

An assembled battery () provided by this invention has a plurality of secondary batteries () connected in series, and has a first bypass circuit () including a Zener diode () connected in parallel so that the connection is in the inverse direction during charging with respect to the series connections, and a second bypass circuit () including a varistor () connected in parallel to the secondary batteries () and the Zener diode (). The Zener voltage of the Zener diode () is set to a prescribed first voltage value, and the varistor voltage of the varistor () is set to a second voltage value equal to or greater than the first voltage value.

Assembled battery and assembled battery control system

A nonaqueous electrolyte secondary battery provided by the present invention includes an electrode body in which a positive electrode sheet and a negative electrode sheetare laminated with a separator sheetinterposed therebetween. A porous layerincluding an inorganic filler and a binder is formed on at least one surface of the separator sheet. The surface of the porous layeris made uneven by forming peaks and valleys, and a maximum difference of elevation on an uneven surfaceis 0.2 &#x3bc;m to 1.7 &#x3bc;m.

Disclosed is a nonaqueous secondary battery () comprising a positive electrode () having a positive current collector () made of a metal, and a positive electrode active material () composed of a lithium-metal complex oxide. The surface of the positive electrode active material () is coated with a lithium salt () having an average thickness of 20-50 nm.

Coated positive electrode active material, positive electrode for nonaqueous secondary battery, nonaqueous secondary battery, and their production methods

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Toyota, Japan

Tomoyoshi Ueki