Samsung SDI

An electrolyte injection apparatus for secondary batteries, the electrolyte injection apparatus being configured to inject electrolyte into an electrolyte injection port (64) on at least one surface of a battery cell (1), the electrolyte injection apparatus including a dispensing unit (100) including a dispensing nozzle (101) configured to inject the electrolyte into the electrolyte injection port (64), a suction unit (200) positioned in a peripheral portion of the dispensing nozzle (101), the suction unit (200) being configured to provide a predetermined suction force, and a suction force generating unit (300) connected to the suction unit (200), the suction force generating unit (300) being configured to generate the suction force.

An electrode includes a substrate, a first active material layer formed on the substrate, and a second active material layer formed on the first active material layer. A porosity of the first active material layer is greater than a porosity of the second active material layer.

A battery pack includes a housing, a plurality of battery cells accommodated in the housing and each including a vent, a cover coupled to the housing and spaced apart from the battery cells, and a heat-resistant layer on the cover and facing the battery cells.

An electrode for secondary battery includes a substrate layer, an active material layer coated on at least one surface of the substrate layer, and a guide member formed along sides of the active material layer. The guide member includes a polymer cured by exposure to electromagnetic waves.

An electrode includes a strip-shaped substrate extending in one direction, an active material layer formed on at least one side of the substrate, and a spacer including a plurality of protrusions in which the substrate and the active material layer are raised together.

The present invention relates to a negative electrode active material, a method for manufacturing the negative electrode active material, and a negative electrode including the negative electrode active material. The negative electrode active material includes porous particles and an amorphous carbon coating layer surrounding the porous particles, wherein the porous particles include metal particles and silicon nanowires in pores of the porous particles, and wherein ends of the silicon nanowires are attached to the metal particle.

Embodiments of the present disclosure provide an electrode assembly including a plurality of positive electrode plates each of which including a positive electrode substrate, a positive electrode active material layer provided on a side of the positive electrode substrate, and a positive electrode uncoated portion where the positive electrode active material layer is not provided. Further, the electrode assembly includes a plurality of negative electrode plates, at least one separator interposed between each of the positive electrode plates and each of the negative electrode plates, and blocking members inserted into one of the positive electrode plates and the negative electrode plates.

A battery module includes a housing, a plurality of battery cells accommodated in the housing and each including a vent, a plurality of bus bars connecting neighboring battery cells of the plurality of battery cells, a cover including an inner cover surface facing the plurality of battery cells, and an outer cover surface opposite the inner cover surface, one or more cover holes passing through the inner cover surface and the outer cover surface and facing the vents, and a cover film facing the one or more cover holes and configured to open and close the one or more cover holes.

A positive electrode active material comprises a first positive electrode active material comprising a first lithium nickel-based composite oxide and being in a form of secondary particles that are agglomerations of primary particles. The primary particles has an average particle diameter of about 0.6 µm to about 1.05 µm as measured by electron backscatter diffraction. The positive electrode active material also comprises a second positive electrode active material including a second lithium nickel-based composite oxide and being in a form of single particles. An average particle diameter (D<50>) of the secondary particles of the first positive electrode active material is greater than an average particle diameter (D<50>) of the single particles of the second positive electrode active material. Based on 100 wt% of a total of the first positive electrode active material and the second positive electrode active material, the positive electrode active material comprises about 10 to about 45 wt% of the first positive electrode active material and about 55 to about 90 wt% of the second positive electrode active material.

A negative electrode active material, a negative electrode including the negative electrode active material, and a method for manufacturing the negative electrode active material are disclosed. The negative electrode active material may include a core and a carbon coating layer on the core. The core may include a porous support including a plurality of pores and a silicon on a surface of the porous support. The plurality of pores may include micro pores. A volume ratio of the micro pores of the porous support may be about 50% to about 100% relative to (e.g., based on) a total pore volume of the porous support. The porous support may include a first amorphous (e.g., non-crystalline) carbon, and the silicon may include an amorphous (e.g., non-crystalline) silicon.