Abstract:
The present disclosure relates to a packaging for a cable-type secondary battery, surrounding an electrode assembly in the cable-type secondary battery, the packaging having a moisture-blocking layer comprising sealant polymer layers on both outer surfaces of a moisture-blocking film and a moisture-blocking film disposed between the sealant polymer layers, wherein the moisture-blocking layer is a tube form surrounding the electrode assembly, and the sealant polymer layers in both ends of the moisture-blocking layer are overlapped and adhered with each other in a predetermined part. The packaging according to the present disclosure can be used in a cable-type secondary battery to block moisture from being infiltrated into an electrode assembly, thereby improving the life characteristics of the battery and preventing the deterioration of battery performances.
Abstract:
Disclosed is a wireless charging apparatus for a cable-type secondary battery. The wireless charging apparatus for the cable-type secondary battery according to the present disclosure includes a socket having a space formed inside for mounting the cable-type secondary battery, a first terminal that is electrically connected to an outer current collector of the cable-type secondary battery mounted in the socket, a second terminal that is electrically connected to an inner current collector of the cable-type secondary battery mounted in the socket, and a secondary coil for wireless charging having one end connected with the first terminal and the other end connected with the second terminal, and wound along an outer circumferential surface of the socket. According to the present disclosure, even if a secondary coil for wireless power reception is absent from a cable-type secondary battery, charging may be performed by a method for wireless power transmission and reception.
Abstract:
A solid electrolyte for an electrochemical device includes a composite of a plastic crystal matrix electrolyte doped with an ionic salt and a crosslinked polymer structure having a linear polymer as a side chain chemically bonded thereto. The linear polymer has a weight average molecular weight of 100 to 5,000 and one functional group. The electrolyte has high ionic conductivity comparable to that of a liquid electrolyte due to the use of the plastic crystal, and high mechanical strength comparable to that of a solid electrolyte due to the introduction of the crosslinked polymer structure. A method for preparing the solid electrolyte does not essentially require the use of a solvent, eliminating the need for drying. The electrolyte is suitable for use in a cable-type battery whose shape is easy to change due to its high ionic conductivity and high mechanical strength comparable to that of a solid electrolyte.
Abstract:
The present invention provides an electrode for a secondary battery, more specifically an electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on at least one surface or the whole outer surface of the current collector; a graphite-based coating layer formed on the top surface of the electrode active material layer and comprising graphite, a conductive material and a first polymer binder; and a porous coating layer formed on the top surface of the graphite-based coating layer and comprising a second polymer binder. Also, the present invention provides a secondary battery and a cable-type secondary battery comprising the electrode.
Abstract:
The present invention relates to an anode for a secondary battery, comprising at least two anode wires which are parallel to each other and spirally twisted, each of the anode wires having an anode active material layer coated on the surface of a wire-type current collector; and a secondary battery comprising the anode. The anode of the present invention has an increased surface area to react with Li ions during a charging and discharging process, thereby improving the rate characteristics of a battery, and also release stress or pressure applied in the battery, e.g., the volume expansion of active material layers to prevent the deformation of the battery and ensure the stability thereof, thereby improving the life characteristic of the battery.
Abstract:
The present invention provides a cable-type secondary battery comprising an inner electrode which includes at least one first polarity electrode having a first polarity current collector with a long and thin shape, whose cross-section perpendicular to its longitudinal direction is a circular, oval or polygonal form; a first polarity electrode active material layer formed on an outer surface of the first polarity current collector; and an electrolyte layer filled to surround the first polarity electrode active material layer, and at least one wire-type second polarity electrode which wholly surrounds the inner electrode and is winding around the exterior thereof.Thus, the inventive cable-type secondary battery provided with an outer winding electrode has excellent flexibility to prevent the release of the active material.
Abstract:
The present invention relates to a sheet-type electrode for a secondary battery, a method for manufacturing the same, a secondary battery comprising the same, and a cable-type secondary battery, the electrode comprising: a sheet-type electrode stacked body comprising a collector, an electrode active material formed on a surface of the collector, and a porous first support layer formed on the electrode active material; and a sealing layer formed so as to surround the entire side surface of the electrode stacked body.
Abstract:
Disclosed is a multilayer cable-type secondary battery including a first electrode assembly comprising one or more first inner electrodes and a sheet-type first separation layer-outer electrode complex spirally wound to surround outer surfaces of the first inner electrodes, a separation layer surrounding the first electrode assembly to prevent short circuit of the electrodes, and a second electrode assembly comprising one or more second inner electrodes surrounding an outer surface of the separation layer and a sheet-type second separation layer-outer electrode complex spirally wound to surround outer surfaces of the second inner electrodes.
Abstract:
The present disclosure provides a cable-type secondary battery, which has a packaging formed skin-tightly on the outer surface of an electrode assembly to improve flexibility significantly even when external force is applied to the cable-type secondary battery, and to prevent a decrease in capacity of the battery, thereby providing improved cycle life characteristics. The cable-type secondary battery comprises an electrode assembly comprising an electrode assembly comprising an inner electrode, a separator layer formed to surround the inner electrode, and an outer electrode formed to surround the outer surface of the separator layer; and a packaging surrounding the electrode assembly, wherein the packaging surrounds the top surface and the bottom surface of the electrode and a portion of the packaging is overlapped at an end thereof and sealed by heat compression, and the overlapped part is folded along the perimeter of the packaging to be a wing portion.
Abstract:
The present invention relates to a sheet-type electrode for a secondary battery, a method for manufacturing the same, a secondary battery comprising the same, and a cable-type secondary battery, the electrode comprising: a sheet-type electrode stacked body comprising a collector, an electrode active material formed on a surface of the collector, and a porous first support layer formed on the electrode active material; and a sealing layer formed so as to surround the entire side surface of the electrode stacked body.