Toyota Jidosha Kabushiki Kaisha

Toyota Motor Engineering & Manufacturing North America, Inc.

Sandia Corporation

Toyota Motor Corporation

National Institute for Materials Science

Yukiyoshi Ueno

Yasushi Tsuchida

Shigenori Hama

Masato Kamiya

Hiroshi Nagase

Junko Ohira

Hideki Sano

Kaoru Inoue

Koji Kawamoto

Hirofumi Nakamoto

Hiroya Umeyama

James E Miller

John A Shelnutt

Wen Li

Hideaki Fujita

Craig J Medforth

Tomoyuki Mizuno

Yujiang Song

Tetsuo Kawamura

Kunimitsu Yamamoto

Kazuo Kawahara

Tochi Tudor Nwoga

Tetsuya Shoji

Kazunori Takada

Masahiro Tatsumisago

Tetsuo Nagami

Akitoshi Hayashi

Satoshi Yoshida

Satoshi Wakasugi

Hirofumi Iisaka

Takayoshi Doi

Nobuhiro Ogihara

Yukinari Kotani

Isao Sakaguchi

Osamu Hiruta

Tsuyoshi Ohnishi

Noriaki Nishino

Tenmei Nisino

Yuuichi Ito

Kunimitu Yamamoto

Xiaoxiong Xu

Ken Watanabe

Junko Ohiro

An in-vehicle system includes a first battery and a second battery respectively connected to a first load and a second load, a relay that connects the two batteries in parallel, and a processor configured to control turn-on and turn-off of the relay to control a state of electric power supply from the first and second batteries to the first and second loads, detect an abnormality in the first and second batteries, and determine a difference between physical quantities of the two batteries. The processor is further configured to, when detecting the abnormality in the first or second battery, turn off the relay, and when no longer detecting the abnormality in the first and second batteries after the relay is turned off, turn on the relay when the processor determines that the difference between the physical quantities of the two batteries satisfies a predetermined condition.

In-vehicle system, method, and non-transitory storage medium

A power storage device electrode includes a layered structure having an organic framework layer containing aromatic dicarboxylic acid anions and an alkali metal element layer in which alkali metal elements are coordinated to oxygen atoms contained in the carboxylic acid anion to form a framework as an electrode active material, and in the whole of the electrode active material, a conductive material and a water-soluble polymer, carboxymethyl cellulose as the water-soluble polymer is contained in a range of 1.5 mass % or more and 3.5 mass % or less. In addition, the layered structure is produced by a spray drying method, and the peak intensity ratio when the power storage device electrode is subjected to X-ray diffraction measurement satisfies a predetermined range.

Power storage device electrode, power storage device, and method of producing power storage device electrode

A nonaqueous electrolyte secondary battery includes a wound electrode assembly in which a positive electrode having, at its one end in a width direction, a positive electrode exposed portion provided without a positive electrode mixture layer on a positive electrode current collector and a negative electrode are wound together, with a separator interposed therebetween. The positive electrode exposed portion protrudes outward in an axial direction of the wound electrode assembly relative to the separator and the negative electrode at one end in the axial direction of the wound electrode assembly. The negative electrode exposed portion protrudes outward in the axial direction of the wound electrode assembly relative to the separator and the positive electrode at the other end in the axial direction. The positive electrode exposed portion has a cutout portion at least in an outermost circumferential portion of the positive electrode.

Nonaqueous electrolyte secondary battery and method of manufacturing the same

A lithium-ion secondary battery () includes a wound electrode body (), a nonaqueous electrolyte, and a box-shaped case (). The wound electrode body includes a positive electrode (), a negative electrode (), and a separator (). The box-shaped case contains the wound electrode body and the nonaqueous electrolyte. The wound electrode body includes a starting-end-side negative electrode remainder portion () provided in a winding-direction starting end portion () of the wound electrode body. The winding-direction starting end portion exists at a winding center side. The starting-end-side negative electrode remainder portion protrudes toward the winding center side along a winding direction beyond the positive electrode. A surplus nonaqueous electrolyte exists in a gap between the wound electrode body and the box-shaped case. The starting-end-side negative electrode remainder portion is positioned in a region where the surplus nonaqueous electrolyte exists, when the lithium-ion secondary battery is disposed in a predetermined posture.

Lithium-ion secondary battery and manufacturing method thereof

An inspection method of a secondary battery includes a charging step, an aging step, a pre-inspection discharge step, a voltage adjustment step, a self-discharge inspection step, and a deficiency determination step. A discharge condition in the pre-inspection discharge step is determined so that a voltage difference accumulation value Vs satisfies a predetermined range. The voltage difference accumulation value Vs is calculated by accumulating a value obtained by subtracting an output voltage from a predetermined voltage over a duration from start of the pre-inspection discharge step to end thereof.

Inspection method and manufacturing method of secondary battery

A method of manufacturing a nonaqueous secondary battery includes: constructing a battery assembly with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution containing an unsaturated carbonate; activating the battery assembly to decompose a portion of the unsaturated carbonate such that a percentage of the unsaturated carbonate is adjusted to be 0.9 mass % or less with respect to 100 mass % of a total amount of the nonaqueous electrolytic solution; self-discharging the battery assembly to measure a voltage drop amount; and determining whether internal short-circuit occurs in the battery assembly based on the voltage drop amount.

Method of manufacturing nonaqueous secondary battery

A nonaqueous electrolyte secondary battery includes a wound electrode body, and the wound electrode body includes two curved portions and a center flat portion which has flat surfaces. A positive electrode winding end, a negative electrode winding end, and separator winding ends are positioned on the same curved portion. The negative electrode winding end is arranged at an advanced position from the positive electrode winding end in a winding direction, and at least one of the separator winding ends is positioned at an advanced position from the negative electrode winding end in the winding direction. A distance a (mm) from the negative electrode winding end to the separator winding end and a distance b (mm) from the positive electrode winding end to the negative electrode winding end satisfy relationships 0.5&#x2264;a&#xd7;(a+b)&#x2264;104 and 0&#x2264;b&#x2264;11.

Nonaqueous electrolyte secondary battery and battery pack

The invention relates to methods of preparing metal particles on a support material, including platinum-containing nanoparticles on a carbon support. Such materials can be used as electrocatalysts, for example as improved electrocatalysts in proton exchange membrane fuel cells (PEM-FCs).

Photocatalytic methods for preparation of electrocatalyst materials

An Object of the invention is to obtain an all solid lithium battery having an excellent output performance. To achieve the object, a sulfide based solid electrolyte is used as an electrolyte; an oxide containing lithium, a metal element that acts as a redox couple, and a metal element that forms an electron-insulating oxide is used as a cathode active material; and the concentration of the metal element that forms the electron-insulating oxide on the surface of the cathode active material (oxide) that is in contact with the sulfide solid electrolyte is made high.

All solid lithium battery

A manufacturing method for a non-aqueous secondary battery includes the following steps. (a) Preparing an electrode body including a positive electrode having a positive electrode active material layer and a negative electrode having a negative electrode active material layer. (b) Constructing a battery assembly using the electrode body and a non-aqueous electrolyte. (c) Initially charging the battery assembly. (d) Aging the battery assembly at a temperature of 60&#xb0; C. or higher. (e) Forcibly starting to discharge the battery assembly in said temperature region after lowering the temperature of the battery assembly down to a temperature region of 35&#xb0; C. or higher and 55&#xb0; C. or lower. (f) Adjusting the SOC of the battery assembly. (g) Measuring a voltage drop amount by self-discharging the battery assembly. And (h) determining whether or not the battery assembly is qualified based on the voltage drop amount.

Manufacturing method for non-aqueous secondary battery

A method of producing a nonaqueous secondary battery includes: preparing an electrode body (S); constructing a battery assembly with the electrode body and a nonaqueous electrolyte (S); initially charging the battery assembly (S); aging the battery assembly at 40&#xb0; C. or higher (S); adjusting an SOC of the battery assembly (S), wherein, the adjusting the SOC is performed such that a residual capacity percentage of the battery assembly is 11.5% or more and 14% or less; self-discharging the battery assembly and measuring a voltage drop amount (S); and determining a quality of the battery assembly based on the voltage drop amount (S).

Method of producing nonaqueous secondary battery

A manufacturing method according to the present invention is a method for manufacturing a nonaqueous electrolyte secondary battery including graphite as a negative-electrode active material. The manufacturing method includes: a step of assembling the battery including a positive electrode and a negative electrode; and a step of performing an initial charging process of performing first charging on the battery. In the initial charging process, charging is performed at a relatively large first current value when a gas generation amount caused in the battery during the charging does not depend on a charging current value, and the charging is performed at a second current value smaller than the first current value when the gas generation amount depends on the charging current value.

Manufacturing method for nonaqueous electrolyte secondary battery

A lithium-ion secondary battery () includes a wound electrode assembly () having a positive electrode current collector foil () and a negative electrode current collector foil). An edge portion () of the positive electrode current collector foil () is exposed in a spiral form at one end of a winding axis (WL). An edge portion () of the negative electrode current collector foil () is exposed in a spiral form at the other end of the winding axis (WL). The spirally exposed edge portion () of the positive electrode current collector foil () is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding a central portion (WC) containing the winding axis (WL), provided between wound layers of the positive electrode current collector foil () stacked in a direction orthogonal to the winding axis (WL). Likewise, the spirally exposed edge portion () of the negative electrode current collector foil () is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding the central portion (WC) containing the winding axis (WL), provided between wound layers of the negative electrode current collector foil () stacked in a direction orthogonal to the winding axis (WL).

Lithium-ion secondary battery and method of manufacturing the same

An all-solid battery is formed so that an electrode active material layer of at least one of positive and negative electrodes has a composition distribution such that a local volume ratio, expressed by a ratio of a volume of an electrode active material contained in a part of the electrode active material layer with respect to a volume of a solid electrolyte material contained in the part of the electrode active material layer, increases as the part of the electrode active material layer approaches from an interface of the solid electrolyte layer toward an interface of a current collector in a thickness direction of the electrode active material layer, and a voidage of the electrode active material layer increases as the part of the electrode active material layer approaches from the interface of the solid electrolyte layer toward the interface of the current collector in the thickness direction.

All-solid battery

The main object of the present invention is to provide a sulfide solid electrolyte material with less hydrogen sulfide generation amount. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material obtained by using a raw material composition containing LiS and sulfide of an element of the fourteenth family or the fifteenth family, characterized by not substantially containing cross-linking sulfur and LiS.

Sulfide solid electrolyte material

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Gotenba, Japan

Yukiyoshi Ueno