Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Other

National Institute of Advanced Industrial Science and Technology

Waseda University

Masahiro Ohta

Takuya Taniuchi

Toru Sukigara

Toshio Tokune

Toshiyuki Ohashi

Ryogo Kato

Toshiyuki Shima

Kiyohito Ishida

Tadashi Tsunoda

Ryosuke Kainuma

Kiyoshi Tanaami

Wataru Shimizu

Toshiyuki Ariga

Kazuki Chiba

Kazuhiro Kagawa

Yasunobu Kawakami

Yusuke Hirabayashi

Hiroto Maeyama

Ushio Harada

Katsunari Oikawa

Hidefumi Nikawa

Hiroshi Kawarada

Yuki Kono

Yohei Noji

Yuuki Tanaka

Sokichi Okubo

Noriaki Kamaya

Toshimitsu Tanaka

Kenta Fukami

Yuriko Asahi

Takashi Nakamoto

Kosei Miyata

The battery unit includes: a battery module including a battery cell; a battery heat flow detector configured to detect a heat flow of the battery cell; a storage configured to store heat flow HF vs. state of charge SOC initial characteristics of the battery cell; and a battery state estimator configured to estimate a state of health SOH of the battery cell. The battery state estimator measures, during charge of the battery cell, HF vs. SOC present characteristics of the battery cell, based on the detected heat flow of the battery cell, and estimates a state of health SOH of the battery cell, from a ratio between a length mAh of a line segment between peaks of differential characteristics of the measured HF vs. SOC present characteristics and a length mAh of a line segment between peaks of differential characteristics of the stored HF vs. SOC initial characteristics.

Battery unit

Provided is a battery module having a high energy density and exhibiting suppressed electrode displacement or peeling during vibration. In the present invention, a residual space in a battery cell, which is necessary for the lithium ion secondary batteries employing the liquid electrolyte is eliminated, and additionally a module component is disposed in a portion that would provide the residual space.

Solid-state battery module

The present invention provides a battery cell capable of uniformly holding an electrode laminate and speeding up a manufacturing process. A battery cell includes an electrode laminate including positive and negative electrodes and an electrolyte layer, in which the positive and negative electrodes are alternately laminated with the electrolyte layer interposed between them; and a tube-shaped insulating member that is heat-shrinkable and holds the electrode laminate, wherein the insulating material has at least two folded parts for positioning a member disposed in the internal space of the insulating member. The insulating member preferably has two portions each between the two folded parts, and the two portions are preferably equal in circumferential length.

Battery cell

Provided are a lithium ion secondary battery electrode that occurrence of short-circuit and contamination can be reduced and the method for manufacturing such a lithium ion secondary battery electrode. An electrode used for a lithium ion secondary battery includes a current collector formed of a metal porous body. The current collector has a mixture layer impregnated with an electrode material mixture containing an electrode active material and a non-mixture-impregnated portion not impregnated with the electrode material mixture and including a tab portion and a tab converging portion. The surface roughness Ra of the non-mixture-impregnated portion is equal to or less than the surface roughness of the mixture layer.

Lithium ion secondary battery electrode and method for manufacturing the same

This battery module is provided with a plurality of battery cells each comprising an all-solid battery having laminated therein a positive electrode layer, a negative electrode layer, and a solid electrolyte layer. Each of the battery cells has a pair of electrode terminals protruding from opposing lateral faces of the battery cell. The plurality of battery cells are arranged so as to be parallel to the lamination planes of the positive electrode layer, the negative electrode layer, and the solid electrolyte layer and in such a manner as to have the respective electrode terminals of different battery cells arrayed in parallel to each other. The electrode terminal and the electrode terminal of battery cells adjacent in the array direction are electrically connected by a bus bar.

Battery module and battery pack

To secure ionic conductivity by improving the adhesion between an electrode material mixture and a solid electrolyte and suppressing electrodeposition of lithium. A lithium ion secondary battery () includes a positive electrode including an electrode material mixture that fills pores of a metal porous body constituting an electrode current collector, a first solid electrolyte layer including a solid electrolyte that fills pores of a resin porous body, and a negative electrode including an electrode material mixture that fills pores of a metal porous body constituting an electrode current collector. The positive electrode and the negative electrode are alternately stacked with the first solid electrolyte layer provided therebetween.

Secondary battery

To provide a solid-state battery module and a separator which can apply sufficient surface pressure to a solid-state battery cell and are excellent in durability and vibration resistance. A separator () disposed between adjacent solid-state battery cells () in a solid-state battery module () including a plurality of solid-state battery cells () to electrically insulate the adjacent solid-state battery cells () of the plurality of solid-state battery cells (), from each other. The separator () includes elastically deformable elastic members () which apply biasing force in the stacking directions of the plurality of solid-state battery cells (). Durability and vibration resistance can be obtained by adequately fixing the solid-state battery cells () with the elastic members ().

Separator and solid-state battery module

To provide a fast charger and a fast charging method that are highly efficient in fast charging of a solid-state battery. A fast charger includes a charging section, a temperature acquisition section, and a controller. The charging section feeds current to a solid-state battery being a secondary battery. The temperature acquisition section acquires a temperature of the solid-state battery. The controller performs control to cool the solid-state battery if the temperature acquired by the temperature acquisition section is greater than or equal to a predetermined temperature. The controller determines a plurality of inflection points on a curve representing changes in the temperature of the solid-state battery against internal resistance of the solid-state battery. The predetermined temperature corresponds to an inflection point on a high-temperature side among the plurality of inflection points.

Fast charger and fast charging method

A battery module is provided with: battery cells comprising all-solid-state batteries having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer; a support plate on which the battery cells are mounted; and a cooling medium channel through which a cooling medium for cooling the support plate flows, wherein electrode terminals are provided so as to project from one surface of the battery cells, bus bars capable of electrically connecting to the electrode terminals are provided on a battery cell mounting surface, the bus bars are in thermal contact with the support plate, and the battery cells are mounted on the support plate by causing one surface of the battery cells to face the cell mounting surface and electrically connecting the electrode terminals to the bus bars.

Battery module

To improve the adhesion between an electrode material mixture and a solid electrolyte, and thereby suppress electrodeposition of lithium. This electrode includes a planar electrode current collector including a metal porous body, an electrode material mixture layer that fills pores of the metal porous body, and a solid electrolyte layer that fills pores of the metal porous body. The electrode material mixture layer is formed on one side of the electrode current collector, and the solid electrolyte layer is formed on the other side of the electrode current collector. The electrode material mixture layer and the solid electrolyte layer are stacked in a planar shape in the pores of the metal porous body.

Electrode and secondary battery including the same

Provided are: a solid-state battery in which an initial load is applied to a battery cell; and a solid-state battery module comprised of the battery. This solid-state battery includes a pressing portion provided on a solid-state battery case so that a spring force is utilized to apply the initial load to the solid-state battery. Specifically, the solid-state battery includes a solid-state battery cell, and a battery case for accommodating the solid-state battery cell, in which the solid-state battery cell is a stack including a positive electrode, a negative electrode, and a solid electrolyte present between the positive electrode and the negative electrode, and in which a face constituting the battery case and extending substantially perpendicular to the stacking direction of the stack has a pressing portion.

Solid-state battery and solid-state battery module

A pouch cell includes: a charging and discharging element; a current collecting tab lead configured to be thinner than the charging and discharging element and drawn out of the charging and discharging element to an outside; an exterior film configured to wrap the charging and discharging element in a state in which the current collecting tab lead is drawn out to an outside; a clamping part configured to clamp the current collecting tab lead from the exterior film by front and back surfaces in a thickness direction; and an airtightness maintaining member mounted to cover an end portion of the clamping part, wherein the airtightness maintaining member is separated from the exterior film, has a slit through which the current collecting tab lead is drawn out to the outside and has a bent part which covers an end portion of the clamping part, and a dimension of the bent part in the thickness direction of the clamping part is larger than a width dimension of the slit.

Pouch cell

The battery unit includes a storage configured to store (A1) and (A2) below, and a battery state estimator. The battery state estimator estimates, based on (A1), a start SOC corresponding to a detected OCV at a start of charge; measures HF vs. SOC present characteristics and detects a peak of differential characteristics of the measured HF vs. SOC present characteristics during the charge; determines a SOC at the detected peak as a SOC(HF) based on (A2); calculates a charge capacity from the start of the charge to detection of the peak; calculates a SOC(OCV) based on the calculated charge capacity and the start SOC; and in a case where the SOC(OCV) deviates with respect to the SOC(HF) by an amount of deviation equal to or greater than a predetermined value, corrects (A1).

To provide a solid-state battery capable of achieving high capacity. A solid-state battery including a multilayer body including a stack of a plurality of electrode layers including positive electrode layers and negative electrode layers and solid electrolyte layers each disposed between the electrode layers, the multilayer body having a columnar shape; and the solid-state battery including a positive electrode terminal and a negative electrode terminal disposed at both end portions of the multilayer body; a positive electrode tab electrically connected to the positive electrode layer and the positive electrode terminal; and a negative electrode tab electrically connected to the negative electrode layer and the negative electrode terminal, wherein the positive electrode tab and the negative electrode tab are spirally wound on an outer peripheral surface of the multilayer body.

Solid-state battery

To provide an electrical storage device in which a positive electrode material and a negative electrode material are each impregnated with a different type of electrolytic solution and a method for making the same. An electrical storage device () includes a negative electrode () including an organic electrolytic solution (), a positive electrode () including an aqueous electrolytic solution (), and a solid electrolyte () disposed between the negative electrode () and the positive electrode (). The negative electrode () is entirely sealed. The electrical storage device () includes a sealing member (), which is provided at the periphery of the negative electrode () and seals the negative electrode (). The solid electrolytes () form a pair including a sealing material and together with the sealing member () seal the negative electrode () so that the negative electrode () is disposed between the solid electrolytes ().

Growing community of inventors

Saitama, Japan

Masahiro Ohta