Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery using the same, and more particularly, to a positive electrode active material that includes a lithium composite oxide comprising at least nickel and cobalt, and is capable of improving particle stability not only on the surface portion but also at the central portion of the lithium composite oxide due to the formation of a concentration gradient in which a cobalt concentration decreases from the surface portion to the central portion of the lithium composite oxide relative to the average radius of the lithium composite oxide to a predetermined thickness, a positive electrode comprising the positive electrode active material, and the lithium secondary battery using the positive electrode.

Abstract: An electrolyte solution, a secondary battery, and an electrical apparatus. Components of the electrolyte solution include an electrolyte salt and a fluorine-containing sulfonamide solvent. The fluorine-containing sulfonamide solvent includes a compound represented by formula (1) in the disclosure, wherein T1 is selected from any one of the following formulas (1-1) to (1-3) in the disclosure: R1 and R2 are each independently selected from any one of alkyl having 1-3 carbon atoms, phenyl, and a sulfone group; T2 is fluorine-substituted alkyl group having 1-4 carbon atoms; and * represents a site of connection.

Abstract: An electrolyte including a dinitrile compound, a multi-nitrile compound with more than 2 cyano groups, and a boron-containing lithium salt. Based on a total weight of the electrolyte, a content of the dinitrile compound is A %, a content of the multi-nitrile compound is B %, and a content of the boron-containing lithium salt is C %, and 0?(A/B)?C+1?11. The cycle performance of the electrochemical device including the electrolyte is improved at a high temperature and in a high state of charge.

Abstract: A system and method for heating and cooling a battery. The system includes a thermoelectric device configured to attach to the battery and operate in a heating mode to elevate the operating temperature of the battery and in a cooling mode to reduce the operating temperature of the battery. Control circuitry is configured to: determine a temperature of the battery; supply an input voltage and a polarity of the thermoelectric device; and adjust the input voltage and the polarity based on a temperature of the battery.

Abstract: The voltage measuring device is configured for measuring the voltage of a plurality of electrochemical cells (10) of an electrochemical reactor formed by a stack of separators (6) and membrane-electrode assemblies (8), each electrochemical cell (10) being formed by a membrane-electrode assembly (8) interposed between two separators (6), the voltage measuring device comprising a support (22) having a base (24) and a plurality of teeth (26) extending from the base (24) in a common direction of extension (D), each tooth (26) having a proximal end (26A) connected to the base (24) and a free distal end (26B) carrying an electrical contact (28) adapted to engage a separator, the support comprising teeth (26) the distal ends of which are offset from each other in the direction of extension (D).

Abstract: A battery pack for efficiently supplying a power to a vehicle and including a battery assembly, a power supply terminal connectable to a connection terminal of the vehicle that is connected to a vehicle control unit and a vehicle motor, a power supply path located between the power supply terminal and the battery cell and supplying a power from the battery cell to the power supply terminal, a switching unit provided on the power supply path electrically turn on/off the power supply path, a mounting recognition unit recognizing whether the battery pack is mounted to the vehicle, and a processor controlling the switching unit so that a power is supplied from the battery cell to the vehicle control unit, when receiving a signal from the mounting recognition unit that the battery pack is recognized as being mounted to the vehicle.

Abstract: A cell connection unit (CCU) for connecting a plurality of aligned battery cells of a battery module and a battery module including the CCU, the CCU including a plurality of busbars, each busbar of the plurality of busbars being connected to cell terminals of at least two battery cells of the plurality of aligned battery cells; and a plurality of carrier rails, at least some carrier rails of the plurality of carrier rails being mechanically connected to at least three busbars of the plurality of busbars, wherein the at least some carrier rails of the plurality of carrier rails include a first reception region connected to at least one busbar of the at least three busbars of the plurality of busbars, and a separate second reception region connected to two busbars of the at least three busbars of the plurality of busbars and electrically insulating the two busbars from each other.

Abstract: Better joining between a wound electrode body and an electrode terminal is implemented. In a cross section orthogonal to a winding axis of a wound electrode body of the secondary battery herein disclosed, two separators respectively extend more inward of the wound electrode body than electrode sheets. A portion of one separator forming an innermost circumference of the wound electrode body is bound in a first curved part. An inner circumferential side end of the one separator is between a junction part of an electrode sheet and an electrode terminal, and a first top around the winding axis. A portion of the other separator forming the innermost circumference is bent in a second curved part, and the inner circumferential side end of the other separator is between the junction part and a second top around the winding axis.

Abstract: A battery module including a battery cell stack in which a plurality of battery cells are stacked; a housing for the battery cell stack; a pair of busbar frames that cover the front and rear surfaces of the battery cell stack; and a pair of end plates that cover the busbar frames and are coupled to the housing, a busbar mounted on each of the busbar frames, and a thin film layer located between the busbar frame and the respective end plate.

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the electrolyte contains a nitrile compound and transition metal ions, and satisfies 5?A/B?30000, where based on a molar mass of the electrolyte, a molar percentage of a cyano group in the electrolyte is A %, and based on a weight of the electrolyte, a weight percentage of the transition metal ions in the electrolyte is B %. The electrochemical device ensures that the cyano group and the transition metal ions in the electrolyte satisfy a specified relationship, to reduce leaching of the transition metal ions from a positive electrode active material and stabilize structural distortion of the positive electrode active material in a charge and discharge process, thereby improving high-temperature cycle performance and floating charge performance of the electrochemical device.

Abstract: Embodiments provide an apparatus for inspecting stacking of electrodes of a secondary battery. The apparatus includes a separator supply device, a stacking main body having a stacking table formed on one surface and configured to allow the separator to be stacked on the stacking table, a stacking jig configured to stack an electrode plate on the separator stacked on the stacking main body, a fixing jig, alighting device configured to emit light from one surface of the stacking table to allow the light to pass sequentially through the separator and the electrode plate, and a capturing unit configured to capture an image of the light that has passed through the separator and the electrode plate. Accordingly, reliability and efficiency may be secured in an electrode stacking process of a secondary battery.

Abstract: A non-aqueous electrolyte, with a coulombic efficiency with respect to lithium of at least 80%, that includes a Group 1 salt dissolved in a mixture containing two sulfone compounds, a mixture containing a sulfone compound and a sultone compound, and/or a mixture containing a sulfone compound and a sulfonamide compound. The Group 1 salt can be a lithium salt, the sulfone compound can be a cyclic sulfone such as thietane-1,1-dioxide and sulfolane, the sultone compound can be a cyclic sultone such as 1,3-propane sultone, and the sulfonamide compound can be a partially fluorinated sulfonamide such as 1,1,1-trifluoro-N,N-dimethylmethanesulfonamide and N-butyl-1,1,1-trifluoro-N-methylmethanesulfonamide. Additives such as another lithium salt, a polyunsaturated compound, a cyclic anhydride, a cyclic unsaturated sultone, and/or a cyclic phosphate can be included in the non-aqueous electrolyte.

Abstract: Provided are a lithium plating detection method, a battery management method and apparatus for safety diagnosis using the lithium plating detection method. The lithium plating detection method according to the present disclosure includes detecting, accumulating and tracking each of an open circuit voltage (OCV) after fully charging and an OCV after fully discharging of a battery every charge/discharge cycle of the battery, and determining if lithium plating took place in the battery using a result of tracking the OCV after fully charging and the OCV after fully discharging, wherein a range satisfying a condition of the reduced OCV after fully charging and the reduced OCV after fully discharging in the tracking result is determined as a range in which lithium plating starts to take place.

Abstract: Described herein are carbon-silicon composite structures and methods of producing such structures. A carbon-silicon composite structure comprises one or more carbon-containing structures that have pores at least partially filled with silicon-containing structures. Specifically, the silicon-containing structures are attached to the pore walls while maintaining void spaces within these pores. These void spaces can accommodate silicon expansion during lithiation. Carbon-silicon composite structures can be produced by submerging carbon-containing structures into a precursor liquid solution (comprising a precursor) and driving this solution into the pores. The silicon-containing structures are then formed (from the precursor) within the pores either electrochemically (e.g., by applying a voltage to the solution and structures) or chemically (e.g., by introducing the structures into a reducing liquid solution). In some examples, these void spaces are sealed from the environment by additional structures, e.g.

Abstract: A cathode active material including a compound represented by Formula 1 and having an olivine structure: Li1??CO1?x?yInxMyPO4??Formula 1 wherein in Formula 1, 0??<1, 0.01?x?0.1, and 0.01?y?0.1, and M in Formula 1 is a divalent element, a trivalent element other than In, a tetravalent element, a pentavalent element, or a combination thereof.

Abstract: The present application provides an electrode assembly, a battery cell, a battery and an electrical apparatus. The electrode assembly includes a main body part, a first tab and a second tab. The main body part is cylindrical. The polarities of the first tab and the second tab are opposite, the first tab and the second tab are arranged at the same end of the main body part along an axial direction of the main body part, and the electrical conductivity of the first tab is smaller than the electrical conductivity of the second tab. Along the axial direction of the main body part, the first tab has a first surface away from the main body part, and the second tab has a second surface away from the main body part, the area of the first surface being larger than the area of the second surface.

Abstract: The present disclosure relates to a positive electrode additive for a lithium secondary battery, and a positive electrode active material, a positive electrode and a lithium secondary battery including the same, and in particular, the positive electrode additive represented by Formula 1 is formed on a surface of a carbon material included in the positive electrode active material and is not dissolved in an electrolyte solution, which functions to electrically separate the positive electrode and a negative electrode, and accordingly, battery performance is enhanced by suppressing side reactions in the battery.

Abstract: An electrolyte for a lithium metal secondary battery is provided. The electrolyte comprises a lithium salt and a non-aqueous solvent and provides improved lifespan characteristics and high rate charging performance when applied to a secondary battery including a lithium metal as a negative electrode active material due to fewer side reactions and excellent stability of the electrolyte.

Abstract: Lithium-ion batteries (LIBs) which include a metal phosphate coating material reactive (scavenging) or stable with cathode materials, HF, LiF, PF5?, and LiOH. The metal phosphates may be applied on the cathode material of LIBs.

Abstract: A power storage device includes a positive electrode and a negative electrode facing each other, a separator disposed between the positive electrode and the negative electrode, the separator being porous, and a sealing member made of a resin and sealing a space between the positive electrode and the negative electrode. The separator includes a material having a melting temperature higher than a melting temperature of a resin material of the sealing member. The separator has an edge portion sandwiched and held in the sealing member in a state where the edge portion is joined to a melted-then-solidified portion of the resin material of the sealing member.