Abstract: A main object of the present disclosure is to provide a battery of which degrade in discharge properties caused by an anode current collector (Al current collector) is inhibited. The present disclosure achieves the object by providing a battery including a cathode, an anode, and an electrolyte layer arranged between the cathode and the anode, wherein the anode includes an anode current collector that is an Al current collector, and an anode active material layer containing an anode active material of which reaction potential is lower than that of Al; and the anode current collector is covered with a resin coating layer containing a resin and a conductive material, and further, an intermediate layer containing the resin and the anode active material is arranged between the resin coating layer and the anode active material layer.

Abstract: An all-solid-state battery including a cell laminate including two or more unit cells, and a resin layer covering a side surface of the cell laminate, wherein each unit cell includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer laminated in this order, at least one of the positive electrode current collector layer, positive electrode active material layer, solid electrolyte layer, negative electrode active material layer, and negative electrode current collector layer includes extending parts which extend more outwardly from the side surface of the cell laminate than the other layers, and gaps are formed between the extending parts, and the ratio of the compressive modulus of the resin layer to the compressive modulus of the cell laminate is 0.4 or less.

Abstract: A solid-state battery includes: a first current collector that includes a first metal layer and a first resin layer containing a resin and a conductive material; a first active material layer; a solid-state electrolyte layer; a second active material layer, and a second current collector that includes a second metal layer and a second resin layer containing a resin and a conductive material, which are layered in this order, wherein the first current collector is provided with the first resin layer at a first active material layer side, and the second current collector is provided with the second resin layer at a second active material layer side.

Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.

Abstract: A regeneration method of an all-solid-state battery includes a step of preparing an all-solid-state battery having a cathode that does not contain copper, and a step of executing overdischarge control of the all-solid-state battery. The overdischarge control is control of mitigating reaction variance that is variance in electrode reaction due to charging and discharging of the all-solid-state battery, by discharging the all-solid-state battery until a potential of the cathode becomes lower than an elution potential of copper.

Abstract: An all-solid-state battery system includes an assembled battery configured by connecting a plurality of cells, and a control device that performs charge control and discharge control of the assembled battery. Each of the plurality of cells is an all-solid-state battery. The control device is configured to perform an equalization process of evenly approximating the amount of stored electricity between the cells in the plateau region in the relationship between the voltage and the amount of stored electricity of the assembled battery in the charge control or the discharge control of the assembled battery.

Abstract: The control device executes a process including a step of acquiring a detected value from each surface pressure sensor when charging is in progress, a step of specifying a corresponding partial pressurizing unit when it is determined that there is a reaction uneven portion, a step of outputting a pressurization command, a step of determining whether or not pressurization is completed, and a step of outputting a pressurization release command when it is determined that pressurization is completed.

Abstract: The control device executes a process including a step of acquiring a detection value from each surface pressure sensor when charging is in progress, a step of specifying a corresponding partially pressing unit when it is determined that there is a portion where the reaction is uneven, a step of outputting a pressing command, a step of determining whether or not pressing is completed, and a step of outputting a pressing cancel command when it is determined that pressing is completed.

Abstract: A battery system includes a control device. The control device is configured to perform a first control and a second control. The first control includes placing an all-solid-state battery in an over-discharge state. The second control includes pressurizing the all-solid-state battery in the over-discharge state. The all-solid-state battery includes an anode layer, a solid electrolyte layer, and a cathode layer, in this order. The cathode layer includes silicon grains. The silicon grains include a clathrate II crystalline phase.

Abstract: The all-solid-state battery system includes an all-solid-state battery and an ECU (control device) that performs charge control and discharge control of the all-solid-state battery. If an internal short circuit is detected during charging control of the all-solid-state battery, the ECU switches charging control to discharging control and discharges the all-solid-state battery.

Abstract: The electrified vehicle includes an all-solid-state battery in which a positive electrode layer, a solid electrolyte layer, and a negative electrode layer are stacked in the front-rear direction (predetermined direction) of the electrified vehicle. The electrified vehicle also includes an acceleration sensor that detects a first acceleration in a direction perpendicular to the longitudinal direction and a second acceleration in the longitudinal direction. In an electrified vehicle, charging and discharging of the all-solid-state battery is prohibited when the first acceleration exceeds the first reference value, and the all-solid-state battery is prohibited until the second acceleration exceeds a second reference value that is larger than the first reference value, charging/discharging is allowed.

Abstract: A main object of the present disclosure is to provide a method for producing an active material wherein a volume variation due to charge/discharge is reduced. The present disclosure achieves the object by providing a method for producing an active material, the method comprising steps of: a preparing step of preparing a LiSi precursor including a Si element and a Li element, and a void forming step of forming a void by extracting the Li element from the LiSi precursor by using a Li extracting solvent, and the LiSi precursor includes a crystal phase of Li22Si5.

Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.

Abstract: An all-solid-state battery, including an all-solid-state battery laminate including at least one all-solid-state unit cell in which a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer are laminated in this order, and a resin layer covering a side surface of the all-solid-state battery laminate. At least one surface of at least one of the positive electrode current collector layer and the negative electrode current collector layer includes a laminated part and an extending part. The laminated part is a portion which overlaps another adjacent layer, and the extending part is a portion which extends beyond the other adjacent layer. The surface roughness of the extending part is greater than the surface roughness of the laminated part.

Abstract: An all-solid-state battery including a cell laminate including two or more unit cells, and a resin layer covering a side surface of the cell laminate, wherein each unit cell includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer laminated in this order, at least one of the positive electrode current collector layer, positive electrode active material layer, solid electrolyte layer, negative electrode active material layer, and negative electrode current collector layer includes extending parts which extend more outwardly from the side surface of the cell laminate than the other layers, and gaps are formed between the extending parts, and the ratio of the compressive modulus of the resin layer to the compressive modulus of the cell laminate is 0.4 or less.

Abstract: A main object of the present disclosure is to provide a method for producing an active material wherein a volume variation due to charge/discharge is reduced. The present disclosure achieves the object by providing a method for producing an active material, the method comprising steps of: a preparing step of preparing a LiSi precursor including a Si element and a Li element, and a void forming step of forming a void by extracting the Li element from the LiSi precursor by using a Li extracting solvent, and the LiSi precursor includes a crystal phase of Li22Si5.

Abstract: An all-solid-state battery including a cell laminate including two or more unit cells, and a resin layer covering a side surface of the cell laminate, wherein each unit cell includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer laminated in this order, at least one of the positive electrode current collector layer, positive electrode active material layer, solid electrolyte layer, negative electrode active material layer, and negative electrode current collector layer includes extending parts which extend more outwardly from the side surface of the cell laminate than the other layers, and gaps are formed between the extending parts, and the ratio of the compressive modulus of the resin layer to the compressive modulus of the cell laminate is 0.4 or less.

Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.

Abstract: The secondary battery negative electrode of the present disclosure includes an active material layer, the active material layer includes a sulfide solid electrolyte and composite particles as an active material, the composite particles include a plurality of porous silicon particles and a binder, and the active material layer has a porosity of more than 15%.

Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.