Samsung SDI

The present disclosure relates to a positive electrode for an all-solid-state battery. The present disclosure includes a positive electrode current collector, and a positive electrode active material layer on the positive electrode current collector. The positive electrode current conductor includes a main body section and a positive electrode tab protruding in one direction from the main body section. The positive electrode active material layer includes a first layer provided on the main body section, and a second layers on the first layer. At least one of the first and second layers includes a positive electrode active material, a solid electrolyte, and a binder. The binder content of the first layer is greater than the binder content of the second layer. The second layer includes a first region adjacent to the positive electrode tab, and a second region which remains after excluding the first region.

Disclosed is an electrolyte for a rechargeable lithium battery, and a rechargeable lithium battery including the rechargeable lithium battery. The electrolyte for a rechargeable lithium battery includes a non-aqueous organic solvent, lithium salt, a first additive, and a second additive .

Disclosed are an apparatus and a method of generating a lithium iron phosphate (LiFePO₄, LFP) battery model. The apparatus includes: a lithium state recorder configured to record a state of lithium (Li) in a positive electrode active material of an LFP battery according to charging or discharging of the LFP battery; and a battery model generator configured to generate a battery model of the LFP battery based on the recorded state of the Li in the positive electrode active material. The battery model generator may generate the battery model by modeling the LFP battery through adding an additional voltage increment corresponding to a charging or discharging path of the LFP battery to an open circuit voltage (OCV), in consideration of the state of the Li in the positive electrode active material.

A battery module includes a housing including a cover plate having thermal conductivity, a plurality of secondary batteries accommodated in the housing and each including an electrode assembly, a case accommodating the electrode assembly, a cap plate which seals the case and faces the cover plate, and a pair of terminals installed on the cap plate, a plurality of busbars accommodated in the housing and configured to electrically connect the plurality of the secondary batteries, and a heat conductor between the cap plates of the plurality of the secondary batteries and the cover plate.

The present disclosure relates to a secondary battery and a method of manufacturing the secondary battery. The secondary battery includes a case having an opening formed therein and an electrode assembly accommodated in the case. The electrode assembly includes a first electrode, a separator, and a second electrode, with the first electrode being electrically connected to the case. A cap assembly seals an opening formed in the case and is electrically connected to the second electrode. A gasket is interposed between the case and the cap assembly. The cap assembly includes a protrusion extending upward along a perimeter of the cap assembly, and the case includes a crimping portion that surrounds the protrusion and fixes the cap assembly to the case.

Provided is an insulating coating composition, an insulating layer, and a rechargeable lithium battery including the insulating layer. An insulating coating composition includes a boehmite particle and a binder, wherein the boehmite particle has a plate-like structure extending in a first direction and a second direction that crosses the first direction, the boehmite particle has a first width in the first direction, a second width in the second direction, and a thickness in a third direction perpendicular to the first direction and the second direction, a ratio of the thickness to the first width is about 0.8 or less, and a ratio of the thickness to the second width is about 0.8 or less.

A battery apparatus includes a charging path through which a charging current is supplied to a battery bank (B) that includes one or more battery cells (C), a charge control switch (SW_C) positioned on the charging path (300) and configured to selectively allow or block a flow of the charging current, and a processor (100) configured to wake up as the charging current is supplied through the charging path, to turn off the charge control switch, and to monitor cell voltages of the one or more battery cells (C) to detect an abnormal battery cell among the one or more battery cells.

A device for detecting a battery condition may include a storage device storing a battery model that models a voltage change and an internal impedance of a battery as an electrical circuit, a measuring device configured to measure a current value of the battery, and a control device configured to estimate a distribution status of lithium ions within a positive electrode active material of the battery, detect a distortion zone remaining in a boundary portion of two identicalphase regions within the positive electrode active material based on the distribution status, estimate an overvoltage caused by the distortion zone, correct the battery model by using a correction parameter corresponding to the overvoltage, and determine a first state-of-charge (SOC) of the battery by using the battery model and an SOC estimated by integrating the current value.

An electrode (400) includes an electrode plate (200) including a substrate (210) and an active material layer (220) located on a portion of the substrate (210). A protective layer (300) including two or more regions having different thicknesses is provided on the electrode plate (200).

The present disclosure refers to a battery system (100). The battery system (100) includes a plurality of battery modules (10). Each of the battery modules (10) includes a plurality of battery cells (12) stacked along a stacking direction (S). First halves of the plurality of battery cells (12) of each adjacent battery module (10) are electrically connected with each other to form a first electric stack (14) and second halves of the plurality of battery cells (12) of each adjacent battery module (10) are electrically connected with each other to form a second electric stack (16). The battery system (100) is configured to selectively connect the first electric stack (14) and the second electric stack (16) in series or in parallel.