Toyota Jidosha Kabushiki Kaisha

Kunimitsu Yamamoto

Yukiyoshi Ueno

Junko Ohira

Tomoyuki Mizuno

Kaoru Inoue

Hideki Sano

Masaki Kato

Hideaki Fujita

Yoshinari Makimura

Chikaaki Okuda

Akira Kiyama

Tsuyoshi Sasaki

Koshiro Yoneda

Kensaku Miyazawa

Sho Ando

To provide a battery module with high volumetric efficiency. A battery module comprising stacked and connected unit cells each comprising a power generation element, a cathode terminal, and an anode terminal disposed on the opposite side of the cathode terminal of the power generation element, wherein a connection laminate layer including a resin layer, a metal layer and a resin layer in this sequence, is disposed between the unit cells, and wherein the metal layer of the connection laminate layer is electrically connected to the cathode terminal of one adjacent unit cell and the anode terminal of the other unit cell.

Battery module

An all-solid-state battery includes a solid electrode body including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer, and a laminate film that stores the solid electrode body. The laminate film has a fragile part with respect to a needle-like foreign substance. The strength of the fragile part is lower than the strength of a part of the laminate film other than the fragile part.

All-solid-state battery

To provide a method for producing a solid-state battery configured to suppress capacity reduction due to electrode cracking. A method for producing a solid-state battery comprising: a stack of a cathode, a solid electrolyte layer and an anode in this order, a resin layer coating at least a part of the stack, a metal housing housing the stack and the resin layer, and a gasifying agent disposed between the stack and the metal housing, wherein the solid-state battery production method comprises discharging the solid-state battery to a SOC of 0% and applying a specified temperature to the discharged solid-state battery.

Method for producing solid-state battery

A positive electrode active material contains at least: fluorine in an amount not lower than 0.08 mass %; carbon in an amount not lower than 0.02 mass %; and lithium-metal composite oxide particles making up the remainder. The lithium-metal composite oxide particles contain nickel in an amount not lower than 60 mol % of the total amount of metallic elements. At least a partial amount of each of the fluorine and the carbon is present on surfaces of the lithium-metal composite oxide particles.

Positive electrode active material, positive electrode, lithium-ion secondary battery, and method of producing positive electrode active material

A rechargeable battery includes at least a porous base, a first electrode layer, an ionic conductor layer, and a second electrode layer. The porous base includes a conductive framework. The framework has a three-dimensional network structure. On at least part of a surface of the framework in the interior of the porous base, the first electrode layer, the ionic conductor layer, and the second electrode layer are stacked in this order. The first electrode layer and the second electrode layer have opposite polarities.

Rechargeable battery and method of producing 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

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.

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Toyota, Japan

Kunimitsu Yamamoto