Abstract: Provided is a pressure testing method for a high-pressure tank capable of avoiding a destruction of the high-pressure tank during a pressure test. A pressure testing method includes: extracting a plurality of AE waveforms from output waveforms of an AE sensor while increasing a pressure inside the high-pressure tank; and testing the high-pressure tank based on the extracted plurality of AE waveforms. The method includes: while increasing the pressure inside the high-pressure tank, classifying the extracted AE waveforms into first waveforms and second waveforms with a classifier that is machine-learned so as to classify the plurality of AE waveforms into the first waveforms derived from a macrocrack that increases immediately before destruction of the high-pressure tank, and the second waveforms derived from a microcrack smaller than the macrocrack; and stopping pressurization of the high-pressure tank based on the number of the first waveforms.

Abstract: A pressure testing method capable of determining with a higher accuracy whether a high-pressure tank is deteriorated. The pressure testing method tests the high-pressure tank that includes a liner and a fiber-reinforced resin layer covering the outer surface of the liner and that has been used while repeating charge and discharge of gas to and from the inside thereof after undergoing a pressure resistance test conducted at a pressure resistance test pressure. The method increases the internal pressure of the high-pressure tank filled with gas to a test pressure that is lower than the pressure resistance test pressure, so that a plurality of AE waveforms is extracted from output waveforms of an AE sensor that detects AE waves generated in the high-pressure tank, and determines whether the high-pressure tank is deteriorated, on the basis of the extracted AE waveforms.

Abstract: A pressure testing method capable of determining with a higher accuracy whether a high-pressure tank is deteriorated. The pressure testing method tests the high-pressure tank that includes a liner and a fiber-reinforced resin layer covering the outer surface of the liner and that has been used while repeating charge and discharge of gas to and from the inside thereof after undergoing a pressure resistance test conducted at a pressure resistance test pressure. The method increases the internal pressure of the high-pressure tank filled with gas to a test pressure that is lower than the pressure resistance test pressure, so that a plurality of AE waveforms is extracted from output waveforms of an AE sensor that detects AE waves generated in the high-pressure tank, and determines whether the high-pressure tank is deteriorated, on the basis of the extracted AE waveforms.

Abstract: Provided is a pressure testing method for a high-pressure tank capable of avoiding a destruction of the high-pressure tank during a pressure test. A pressure testing method includes: extracting a plurality of AE waveforms from output waveforms of an AE sensor while increasing a pressure inside the high-pressure tank; and testing the high-pressure tank based on the extracted plurality of AE waveforms. The method includes: while increasing the pressure inside the high-pressure tank, classifying the extracted AE waveforms into first waveforms and second waveforms with a classifier that is machine-learned so as to classify the plurality of AE waveforms into the first waveforms derived from a macrocrack that increases immediately before destruction of the high-pressure tank, and the second waveforms derived from a microcrack smaller than the macrocrack; and stopping pressurization of the high-pressure tank based on the number of the first waveforms.

Abstract: A current interrupt mechanism includes a partition wall defining a second space that is independent from a first space, and the partition wall includes a current path portion serving as a current path of a sealed battery. The current interrupt mechanism interrupts the current path in response to an internal pressure of the second space that is higher than a predetermined pressure. One conductive path passes through the current path of the current interrupt mechanism, and is in contact with the second electrolyte solution enclosed in the second space. Another conductive path includes a potential application line that is wired to the second electrolyte solution enclosed in the second space.

Abstract: A battery pack includes a plurality of cell assemblies arranged side by side, and a restraining member restraining the plurality of cell assemblies along a direction in which the cell assemblies are arranged. Each of the plurality of cell assemblies includes a cell, a first spacer, a second spacer, a first connecting member, and a second connecting member. In adjacent cell assemblies, either one of the first and second extension portions of one of the adjacent cell assemblies and either one of the first and second extension portions of the other one of the adjacent cell assemblies are overlapped on each other between the first spacer and the second spacer that are overlapped on each other.

Abstract: A battery pack includes a plurality of cell assemblies arranged side by side, and a restraining member restraining the plurality of cell assemblies along a direction in which the cell assemblies are arranged. Each of the plurality of cell assemblies includes a cell, a first spacer, a second spacer, a first connecting member, and a second connecting member. In adjacent cell assemblies, either one of the first and second extension portions of one of the adjacent cell assemblies and either one of the first and second extension portions of the other one of the adjacent cell assemblies are overlapped on each other between the first spacer and the second spacer that are overlapped on each other.

Abstract: A current interrupt mechanism includes a partition wall defining a second space that is independent from a first space, and the partition wall includes a current path portion serving as a current path of a sealed battery. The current interrupt mechanism interrupts the current path in response to an internal pressure of the second space that is higher than a predetermined pressure. One conductive path passes through the current path of the current interrupt mechanism, and is in contact with the second electrolyte solution enclosed in the second space. Another conductive path includes a potential application line that is wired to the second electrolyte solution enclosed in the second space.

Abstract: A method for producing a sulfide glass ceramic, including reacting a lithium compound, a phosphorus compound and a halogen compound in a solvent that contains a hydrocarbon and an ether compound to produce a sulfide glass that contains a Li element, a P element, a S element and one or more halogen elements, and heating the sulfide glass to produce a sulfide glass ceramic.

Abstract: A method for producing a lithium composition capable of suppressing the generation of polysulfides is provided. The method for producing a lithium composition includes a first aqueous solution forming step of forming a first aqueous solution by reacting iodine with a reducing aqueous solution containing calcium oxide, formic acid, and water under a condition of a pH of 5.5 or more and a pH of 10.21 or less through heating, a second aqueous solution forming step of forming a second aqueous solution by adding calcium oxide to the first aqueous solution, a third aqueous solution forming step of forming a third aqueous solution by adding lithium carbonate to the second aqueous solution, and a Li2S forming step of forming the lithium sulfide (Li2S) by sulfurizing lithium hydroxide (LiOH) to form lithium hydrosulfide (LiHS) and then eliminating hydrogen sulfide from lithium hydrosulfide (LiHS).

Abstract: A method for producing a sulfide glass ceramic, including reacting a lithium compound, a phosphorus compound and a halogen compound in a solvent that contains a hydrocarbon and an ether compound to produce a sulfide glass that contains a Li element, a P element, a S element and one or more halogen elements, and heating the sulfide glass to produce a sulfide glass ceramic.

Abstract: The present invention is to provide a method for producing such a sulfide solid electrolyte that it has high lithium ion conductivity and the total amount of heat generated by the reaction with the charged anode material that proceeds at around 315° C., is reduced. Disclosed is a method for producing a sulfide solid electrolyte, wherein the method includes: a first step of preparing Li3PS4 having a ? structure, and a second step in which a second step mixture that contains the Li3PS4 having the ? structure obtained in the first step and LiX (where X is halogen) is non-crystallized, and the non-crystallized second step mixture is heated in a temperature range of more than 150° C. and less than 190° C.

Abstract: The present invention is to provide a method for producing such a sulfide solid electrolyte that it has high lithium ion conductivity and the total amount of heat generated by the reaction with the charged anode material that proceeds at around 315° C., is reduced. Disclosed is a method for producing a sulfide solid electrolyte, wherein the method includes: a first step of preparing Li3PS4 having a ? structure, and a second step in which a second step mixture that contains the Li3PS4 having the ? structure obtained in the first step and LiX (where X is halogen) is non-crystallized, and the non-crystallized second step mixture is heated in a temperature range of more than 150° C. and less than 190° C.

Abstract: A method for producing a lithium composition capable of suppressing the generation of polysulfides is provided. The method for producing a lithium composition includes a first aqueous solution forming step of forming a first aqueous solution by reacting iodine with a reducing aqueous solution containing calcium oxide, formic acid, and water under a condition of a pH of 5.5 or more and a pH of 10.21 or less through heating, a second aqueous solution forming step of forming a second aqueous solution by adding calcium oxide to the first aqueous solution, a third aqueous solution forming step of forming a third aqueous solution by adding lithium carbonate to the second aqueous solution, and a Li2S forming step of forming the lithium sulfide (Li2S) by sulfurizing lithium hydroxide (LiOH) to form lithium hydrosulfide (LiHS) and then eliminating hydrogen sulfide from lithium hydrosulfide (LiHS).

Abstract: A manufacturing method for a sulfide-based solid electrolyte material includes: preparing a raw material mixture, containing LiHS and LiX (X is one of F, Cl, Br and I), from a single lithium source; and desorbing hydrogen sulfide from the LiHS in the raw material mixture to form Li2S and synthesizing a sulfide-based solid electrolyte material from the LiX and the Li2S.

Abstract: The present invention provides a degradation diagnosis device for a cell, the degradation diagnosis device for a cell comparing a potential variation characteristic of a comparison subject cell during discharging and after discharging is stopped and a potential variation characteristic of a degradation diagnosis subject cell during discharging and after discharging is stopped, in a case where the potential variation characteristic of the comparison subject cell during discharging and after discharging is stopped and the potential variation characteristic of the degradation diagnosis subject cell during discharging and after discharging is stopped are not same, diagnosing a cause of the degradation as including degradation of an active material, and in a case where they are same, diagnosing the cause of the degradation as being other than the active material.

Abstract: Disclosed is an exhaust air purification device, which enables heating a carrier uniformly and heating a catalyst supported on the carrier above an active temperature thereof even when an engine is run on a cold-start mode. Specifically disclosed is an exhaust air purification device, which includes a hollow case as an exterior, a cylindrical carrier housed in the case and having a catalyst supported thereon, and a pair of electrodes arranged on the outer circumferential surface of the carrier. In the device, the carrier is electrically heated through the pair of electrodes so that the catalyst is heated to an active temperature thereof. In the device, each of the pair of electrodes is placed on an arc-shaped outer circumferential segment of the carrier that has a central angle of 20 to 40 degrees, and the electrodes are opposed to each other with the phase difference of 180 degrees.

Abstract: In an all-solid secondary battery, in an electrode active material layer of at least one of positive and negative electrode bodies, a total content ratio, which is represented by a ratio of mass of an electrolyte contained in the electrode active material layer to mass of an active material contained in the electrode active material layer, is larger than 1; and the electrode active material layer of the at least one of the positive and negative electrode bodies has a composition distribution in which a local content ratio, which is represented by a ratio of mass of the electrolyte contained in a portion of the electrode active material layer to mass of the active material contained in the portion of the electrode active material layer, increases from a solid electrolyte interface toward a current collector interface in a thickness direction of the electrode active material layer.

Abstract: A manufacturing method for a sulfide-based solid electrolyte material includes: preparing a raw material mixture, containing LiHS and LiX (X is one of F, Cl, Br and I), from a single lithium source; and desorbing hydrogen sulfide from the LiHS in the raw material mixture to form Li2S and synthesizing a sulfide-based solid electrolyte material from the LiX and the Li2S.

Abstract: A manufacturing method for an electrode catalyst layer includes: containing a conductive carrier on which a catalyst is supported, a substrate, an electrolyte resin and a supercritical fluid inside a closed container (S102 to S106); and cooling the substrate to form an electrode catalyst layer, having the conductive carrier on which the catalyst is supported and the electrolyte resin, on the substrate (S 108).