Abstract: Welding electrode arrangement and method for welding one interconnector of two adjacent electrochemical cells of a rechargeable battery. The two electrochemical cells are disposed to be separated by means of a housing partition. The interconnectors are disposed to face one another on two opposite sides of the housing partition. An opening is disposed in a region of the housing partition. The method comprises contacting the interconnectors with a welding electrode arrangement. The welding electrode arrangement has at least one pair of welding electrodes. One welding electrode of the at least one pair of welding electrodes contacts in each case one of the interconnectors by means of an insert part. The method further comprises welding the interconnectors in such a manner that the material of the interconnectors melts at least in regions and is connected in a materially bonded manner through the opening in the housing partition.

Abstract: A vehicle battery cooling apparatus configured to cool a battery mounted on a vehicle includes a first fluid circuit and a second fluid circuit. In the first fluid circuit, a first cooling fluid to cool the battery is to be circulated while the vehicle is traveling. In a second fluid circuit, a second cooling fluid to cool the battery is to be circulated while the battery is being charged. The first fluid circuit and the second fluid circuit are independent from each other.

Abstract: A secondary battery, a battery pack, and an electric device. The secondary battery includes: a case with an inner cavity in which an electrolyte is included; a cap assembly covering an opening of the case; and an electrode assembly located in the inner cavity, the electrode assembly including an electrode unit and tabs, and along a length direction, the electrode unit including two side portions disposed oppositely, the tabs extending from the side portions; a connecting component configured to connect the tabs and the cap assembly; a flow guiding component located between a corresponding connecting component and a corresponding side portion, being connected to the connecting component and provided with an avoiding portion configured to avoid the tabs, and being in contact with the electrolyte, at least part of the flow guiding component being in contact with the corresponding side portion, and the flow guiding component.

Abstract: The present disclosure provides a solid electrolyte material having high lithium ion conductivity. A lithium ion conductive solid electrolyte material according to the present disclosure comprises Li, La, O, and X. X is at least one element selected from the group consisting of Cl, Br, and I.

Abstract: An equipment component fixation structure includes: a cell stack; an equipment case; an equipment component; an in-vehicle bracket; and a support bracket supporting the equipment case. The in-vehicle bracket has a shape as extending from the cell stack to below the equipment case. The support bracket couples the in-vehicle bracket and the equipment case.

Abstract: A battery pack includes a battery pack housing that is flooded with a dielectric fluid and sealed. The battery pack includes a vent block disposed on an outer surface of the housing, and a bladder disposed inside the housing that communicates with the vent block via a fitting. The bladder interior space includes air, and the bladder expands and contracts to accommodate volume changes of the dielectric fluid due to changes in the environment of the battery pack.

Abstract: A case-neutral electrochemical cell has an electrode assembly comprising a separator positioned between an anode and a cathode housed inside a casing. The casing supports a co-axial glass-to-metal seal comprising an inner insulating glass hermetically sealed to a terminal pin and to the inner surface of a first or inner ferrule. An outer insulating glass is hermetically sealed to the outer surface of the inner ferrule and the inner surface of a second or outer ferrule, and the outer ferrule is secured to an opening in the casing. Then, one of the anode and the cathode is connected to the terminal pin and the other of the anode and the cathode is connected to the first or inner ferrule. An electrolyte is provided in the casing to activate the electrode assembly.

Abstract: Provided is a solid electrolyte composition including: an inorganic solid electrolyte having ion conductivity of a metal belonging to Group 1 or Group 2 in the periodic table; and a polymer represented by a specific formula. Provided are also a sheet for an all-solid state secondary battery, an electrode sheet for an all-solid state secondary battery, and an all-solid state secondary battery that are formed of the solid electrolyte composition, a sheet for an all-solid state secondary battery, and a method of manufacturing an all-solid state secondary battery.

Abstract: The cathode active material according to embodiments of the present invention includes a lithium composite oxide particle having a form of secondary particle in which a plurality of primary particle are aggregated, wherein the primary particles respectively include a lithium conduction pathway through which lithium ions are diffused. Wherein the primary particles include a first particle, and the first particle has an angle of 45° to 90° formed by a direction from a center of the first particle to a center of the lithium composite oxide particle and a direction of the lithium conduction pathway included in the first particle, wherein a ratio of the number of the first particles among the primary particles located on a surface of the lithium composite oxide particle is 20% or more.

Abstract: The present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.

Abstract: A positive electrode and a lithium secondary including the same is disclosed herein. In some embodiments, the positive electrode includes a positive electrode current collector, a first positive electrode active material layer and a second positive electrode active material layer sequentially stacked on the positive electrode current collector, wherein the first positive electrode active material layer and the second positive electrode active material layer include a bimodal positive active material, the first positive electrode active material layer includes small-diameter particles in the form of single particles, and the second positive electrode active material layer includes small-diameter particles in the form of secondary particles. The positive electrode has improved capacity, efficiency, lifespan, output properties, and thermal stability.

Abstract: A halide solid electrolyte material according to the present disclosure is represented by the chemical formula Li6-4b+2ab(Zr1-aMa)bX6 (I), wherein M denotes at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, X denotes at least one halogen element, and two mathematical formulae 0<a<1 and 0<b<1.5 are satisfied.

Abstract: The present disclosure provides a solid electrolyte material having high lithium ion conductivity. A solid electrolyte according to the present disclosure contains Li, Sm, O, and X. X is at least one element selected from the group consisting of Cl, Br, and I.

Abstract: A process for manufacturing a gas diffusion device includes providing a superposition of a composite layer and of an electrically conductive element, the composite layer including electrically conductive fibers and a polymerizable resin impregnating the conductive fibers, and the electrically conductive element having an open porosity between a first face and a second face. The process also includes compressing the superposition of the composite layer and of the conductive element so as to bring said conductive fibers into contact with the first face of the element, so as to make said resin flow into said element without the resin impregnating all the volume of said conductive element; and polymerizing the resin.

Abstract: An electrode for an all solid-state battery including an electrode current collector, and an electrode active material layer formed on at least one surface of the electrode current collector, wherein the electrode active material layer includes electrode active material particles, a solid electrolyte coated on at least part of surface of the electrode active material particles to connect the electrode active material particles to each other, and a linear structure distributed between the electrode active material particles.

Abstract: A battery pack including battery cells; a circuit unit connected to the battery cells; and a flexible wiring connecting the battery cells and the circuit unit to each other, wherein the flexible wiring includes a first end portion to which a plurality of conductive lines are physically bound; and a first group of conductive lines and a second group of conductive lines which extend from the first end portion, branch off from each other, and then extend in parallel to each other, and the first group of conductive lines includes a folded portion at a branching position at which the first group of conductive lines is separated from the second group of conductive lines.

Abstract: Provided are a negative electrode composition including a sulfide-based inorganic solid electrolyte, a negative electrode active material containing a silicon atom or a tin atom, and a polymer, in which the polymer has substantially no adsorption capacity to the negative electrode active material and the sulfide-based inorganic solid electrolyte, a modulus of elasticity of the polymer measured in accordance with JIS K 7161 (2014) is 100 MPa or higher and 1000 MPa or lower, and in a case where a negative electrode active material layer is formed of the negative electrode composition, the polymer is contained in the negative electrode active material layer in a particle form, a negative electrode sheet for an all-solid state secondary battery, an all-solid state secondary battery, a method for manufacturing a negative electrode sheet for an all-solid state secondary battery, and a method for manufacturing an all-solid state secondary battery.

Abstract: The extraction portion of a current collector plate is configured to include a first piece portion extending in a direction orthogonal to the first direction from an outer edge portion provided on an edge of the flat plate portion when viewed from the first direction, a second piece portion extending in the first direction and having an attachment portion that attaches the extraction portion, and a bent portion being where a plate material configuring the extraction portion bends, and connecting the first piece portion and the second piece portion. A spring portion that is configured to relieve a stress acting on the extraction portion is provided between the connection portion to the outer edge portion and the attachment portion in the extraction portion. The spring portion includes at least a first bent portion being where the plate material bends other than at the bent portion.

Abstract: A battery apparatus may include: a plurality of battery cells, each of the battery cells having a positive electrode and a negative electrode; and a plurality of battery tabs. Each of the battery tabs has at least one cell-connection part, which is electrically connected to the positive electrode or the negative electrode of a respective one of the plurality of battery cells, and a sheet part, which is integrally formed with the at least one cell-connection part. Each of the battery tabs may be either a first-type battery tab or a second-type battery tab. The sheet thickness of at least one portion of the first-type battery tab may be larger than the sheet thickness of at least one portion of the second-type battery tab.

Abstract: A battery module comprises: electrochemical cells arranged in rows with terminals in a coplanar arrangement, wherein the electrochemical cells include a first cell and a second cell; a busbar including coplanar interleaved fingers, wherein the first and second cells are positioned on opposite sides of a first coplanar interleaved finger of the coplanar interleaved fingers; and a first bond wire having: (i) a first wire bond at a first terminal of the first cell, (ii) a second wire bond at a first terminal of the second cell, and (iii) a first intermediate wire bond at the first coplanar interleaved finger between the first and second wire bonds.