Abstract: A material management method applied to a battery production line includes controlling, after a plurality of battery cells placed on a plurality of stations reach designated code scanning positions, a plurality of blocking devices to work in a first working state according to a predetermined sequence, thereby blocking identifications of the battery cells on the corresponding stations, acquiring code scanning results of a plurality of code scanning devices corresponding to the blocking devices for the identifications, respectively, when the blocking devices work in the first working state, and determining, according to the code scanning results, whether a binding relationship between the code scanning devices and the stations is abnormal.

Abstract: A cell includes a housing having an opening orientated towards a first direction, an end cover assembly configured to cover the opening and including an end cover body and two kinds of electrode terminals having opposite polarities, and at least two electrode assembly groups arranged in parallel in the housing in a second direction perpendicular to the first direction. Each electrode assembly group includes at least one electrode assembly each including a main part and two kinds of battery tabs having opposite polarities and led out from the main part. Two adjacent battery tabs in every two adjacent electrode assembly groups have a same polarity and are connected in common to an electrode terminal having the same polarity. Two battery tabs away from each other in every two adjacent electrode assembly groups have a same polarity and are connected to an electrode terminal having the same polarity.

Abstract: A positive electrode plate includes a first active material and a second active material. The first active material is selected from a lithium iron phosphate-based material represented by a formula LiFe1-xMnxPO4, where x is between 0-0.8. The second active material includes one or more of lithium nickelate, lithium manganate, lithium cobaltate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate, a lithium-rich manganese base, and lithium vanadium phosphate. An amount of the second active material used accounts for, by mass, 10-70%, on the basis of a total mass of the first active material and the second active material.

Abstract: Methods for reducing contact resistance include performing a selective titanium silicide (TiSi) deposition process on a middle of the line (MOL) contact structure that includes a cavity in a substrate of dielectric material. The contact structure also includes a silicon-based connection portion at a bottom of the cavity. The selective TiSi deposition process is selective to silicon-based material over dielectric material. The methods also include performing a selective deposition process of a metal material on the MOL contact structure. The selective deposition process is selective to TiSi material over dielectric material and forms a silicide capping layer on the silicon-based connection portion. The methods further include performing a seed layer deposition process of the metal material on the contact structure.

Abstract: A battery cell, a battery, an electric apparatus, and a manufacturing method and manufacturing device of battery cell are described. The battery cell includes: an electrode assembly; a casing having an accommodating cavity for accommodating the electrode assembly; an exhaust mechanism provided on the casing, the exhaust mechanism including a connecting component and a breathable component, and the breathable component is configured to discharge gas to outside of the casing when gas pressure inside the casing reaches a threshold; and an electrolyte, filled in the casing; where gas permeability A of the breathable component, conductivity S of the electrolyte, and gas containment space V satisfy 20 mm2*ms/cm*ml<AS/V<165 mm2*ms/cm*ml, and the gas containment space V is a ratio of a remaining value of volume of the accommodating cavity minus volume of the electrolyte and volume of the electrode assembly to capacity of the electrode assembly.

Abstract: A secondary battery and a preparation method thereof and a battery module, a battery pack and a device comprising the secondary battery are provided. The secondary battery comprises an electrode assembly, which comprises a main body part and a tab extending from the main body part, which comprises a negative electrode plate, and the negative electrode plate comprises a negative electrode current collector and a negative electrode film layer provided on at least one surface of the negative electrode current collector, wherein the negative electrode film layer comprises a first region and second regions provided on both sides of the first region in the extension direction of the tab, the first region comprises a first negative electrode active material, the first negative electrode active material comprising artificial graphite, and each of the second regions comprises a second negative electrode active material, the second negative electrode active material comprising graphite.

Abstract: A secondary battery includes a negative electrode plate including a negative electrode current collector, a first negative electrode material layer including a first negative electrode active material, and a second negative electrode material layer including a second negative electrode active material. The first negative electrode material layer is located between the negative electrode current collector and the second negative electrode material layer. The first negative electrode active material includes a first artificial graphite and a second artificial graphite. The first artificial graphite includes secondary particles. An amorphous carbon coating layer is provided on a surface of the first artificial graphite. The second artificial graphite includes primary particles. No amorphous carbon coating layer is provided on a surface of the second artificial graphite.

Abstract: Augmented reality headsets. A plurality of tilted pin-mirrors imbedded between an inner surface and an outer surface of a combiner, where the plurality of tilted pin-mirrors are configured to reflect the guided image light towards the eye box, and wherein the plurality of pin-mirrors include one or more gaps between them wherein the one or more gaps allow the passage of an ambient light through the combiner towards the eye box.

Abstract: Augmented reality headsets. A plurality of tilted pin-mirrors imbedded between an inner surface and an outer surface of a combiner, where the plurality of tilted pin-mirrors are configured to reflect the guided image light towards the eye box, and wherein the plurality of pin-mirrors include one or more gaps between them wherein the one or more gaps allow the passage of an ambient light through the combiner towards the eye box.