SK Innovation

A battery immersion cooling apparatus according to an embodiment of the present disclosure includes a case (100) accommodating an immersion fluid and accommodating a battery cell (10) or a battery module immersed in the immersion fluid, a cooling layer (200) disposed on at least one surface of the case (100) and a heat transfer protrusion (300) formed on one side of the cooling layer (200) and configured to exchange heat with the immersion fluid.

An anode active material for a lithium secondary battery includes a silicon oxide particle. A Si-O atomic bond distance of the silicon oxide particle which is measured from a pair distribution function (PDF) obtained by an X-ray diffraction (XRD) analysis of the silicon oxide particle is in a range from 3 Å to 3.3 Å.

An anode for a lithium secondary battery includes an anode current collector; and an anode mixture layer on at least one surface of the anode current collector, wherein the anode mixture layer includes a carbon-based active material, and wherein the anode mixture layer has a peak intensity ratio of 1.85 to 3.5 according to Equation 1 below, Peakintensityratio=I2H100/I3R101, wherein in Equation 1, I_2H(100) is a peak intensity value of the 2H(100) plane in an X-ray diffraction pattern obtained by an XRD analysis, and I_3R(101) is a peak intensity value of the 3R(101) plane in the X-ray diffraction pattern obtained by the XRD analysis.

An immersion cooling apparatus (100) according to an embodiment of the present disclosure includes a housing (110) configured to store a cooling fluid (10) therein; a plurality of electronic circuit boards (120) disposed inside the housing (110) to be immersed in the cooling fluid (10); and a heat exchange device (130) configured to perform heat exchange with the cooling fluid (10) having absorbed heat from the plurality of electronic circuit boards (120). At least one of the plurality of electronic circuit boards (120) includes a substrate (121); a plurality of electronic components (122) disposed on the substrate (121); and at least one coalescing unit (123) disposed between the plurality of electronic components (122), the at least one coalescing unit (123) being configured to coalesce at least one first vapor bubble (21) that is generated by heat of an electronic component (122) located at a lower position among the plurality of electronic components (122) and rises in an vertical direction of the housing (110).

The present disclosure relates to a battery immersion cooling apparatus and a battery immersion cooling method. A battery immersion cooling apparatus according to an embodiment of the present disclosure includes a module case (100) accommodating a plurality of battery cells (10) and containing an immersion coolant configured to cool the plurality of battery cells (10) by immersion, and a cooling unit (200) disposed on one side of the module case (100) and configured to circulate a circulation coolant. The cooling unit (200) includes a circulation coolant inlet (210) and a circulation coolant outlet (220), and the circulation coolant circulates through a flow path of the cooling unit (200) and exchanges heat with the immersion coolant to indirectly cool the plurality of battery cells (10).

A conductive material dispersion according to embodiments of the present disclosure may include a linear conductive material; an ionic cellulose polymer; and a nonionic cellulose polymer, wherein a weight ratio of the ionic cellulose polymer to the nonionic cellulose polymer is 60:1 to 4:1, and a weight average molecular weight of the ionic cellulose polymer may be greater than that of the nonionic cellulose polymer. Also disclosed is a method for preparing a conductive material dispersion, and a use of a dispersant defined by or composed of a combination of ionic cellulose polymer and non-ionic cellulose polymer for dispersing a linear conductive material in a solvent.

A cathode active material for a lithium secondary battery according to exemplary embodiments of the present disclosure includes a lithium-nickel metal oxide having secondary particles having a pseudo-single-crystal structure. The number of primary particles included in the secondary particle is 20 to 200. Among the primary particles, the number of primary particles having a major axis length of 0.8 µm or more is 20 to 80.

An electrodialysis system is proposed. The electrodialysis system includes an anode and a cathode, a plurality of alternating cation exchange membranes and anion exchange membranes disposed between the anode and the cathode, the alternating cation exchange membranes and anion exchange membranes forming a desalination chamber, a concentration chamber, and an electrode chamber within the system, and a mixed ion exchange resin disposed between the electrode chamber and the adjacent concentration chamber, and between the adjacent concentration chambers. The mixed ion exchange resin includes a cation exchange resin and an anion exchange resin, and is arranged to be sandwiched between one of each of the cation and anion exchange membranes.

Proposed is an additive composition for a thermal management fluid, the composition including a phosphorus-based additive and a silicon-based additive. Further proposed is a thermal management fluid composition including the additive composition.

Proposed is a phosphorus-based additive composition for a thermal management fluid, the composition including a first phosphorus-based additive and a second phosphorus-based additive, in which the second phosphorus-based additive has a greater molecular weight than the first phosphorus-based additive. Further proposed is a thermal management fluid composition including the additive composition.