Abstract: The present invention relates to an electric double layer capacitor including: an anode formed by applying a conductive layer and an anode active material layer on an anode current collector; and a cathode including a cathode active material layer on a cathode current collector. According to the present invention, resistance of the anode is reduced through a change of the electrode structure of the cathode and the anode by applying the conductive layer on the anode current collector and applying the anode active material on the conductive layer. Therefore, it is possible to minimize capacity reduction compared to conventional methods and improve energy density of a cell by improving a withstand voltage of the cell.

Abstract: The present invention relates to an electric double layer capacitor in which particle sizes of a cathode active material and an anode active material are different from each other, and a difference in the particle size between the cathode active material and the anode active material is 3 to 10 ?m; or conductive agent contents in electrode active material compositions of a cathode and an anode are different from each other, and a difference in the conductive agent content between the electrode active material compositions of the cathode and the anode is 5 to 25 wt %.

Abstract: Disclosed herein is a pressure valve for an energy storage device. The energy storage device according to an exemplary embodiment of the present invention includes: a valve body provided with a vent guide for communicating a gas vent of the energy storage device with the outside; and an elastic body interposed between the valve body and the gas vent to elastically support the valve body to an inner side of the gas vent to move the valve body to an outer side of the gas vent when a gas pressure in the gas vent rises, thereby communicating the vent guide with the outside and recover the valve body when the gas pressure in the gas vent falls, thereby blocking the vent guide from the outside.

Abstract: Disclosed herein is an air valve for an energy storage device, including: a valve body mounted in a gas vent of an energy storage device and having a passage for discharging gases within the gas vent to the outside; and a plurality of magnets mounted within the passage to apply repulsion force to one another so as to block the gas vent from the outside by the repulsion force and communicate the gas vent with the outside when a gas pressure within the gas vent is larger than the repulsion force, thereby discharging gases. By this configuration, exemplary embodiments of the present invention can configure the air valve with the simple structure capable of smoothly discharging gases generated from the energy storage device while minimizing a volume of the air valve and being semi-permanently used while minimizing a mechanical configuration of the air valve.

Abstract: An electric double layer capacitor (EDLC) includes an electric double layer cell and first and second external electrodes. The electric double layer cell includes a separator and at least one first polarizable electrode and at least one second polarizable electrode. The first and second external electrodes are formed at first and second side surfaces of the electric double layer cell facing each other, respectively. The first polarizable electrode includes a first current collection layer and a first active material layer formed on either surface of the first current collection layer facing the separator and the second polarizable electrode includes a second current collection layer and a second active material layer formed on either surface of the second current collection layer facing the separator.

Abstract: Disclosed herein are an energy storage case includes: a housing including a reception part in which an energy storage cell and an electrolyte are received; a cover part coupled to the housing and including two through-holes penetrating through both surfaces thereof; a lead connection part including a fusing part to which one end of a current collector of the energy storage cell is fused and a coupling part formed with a first screw part; and an external lead part including a second screw part coupled to the first screw part and a head part having a rectangular shape.

Abstract: A method of manufacturing a chip-type electric double layer capacitor, including: forming a lower case having an opened housing space and first and second external terminals buried therein, the first and second external terminals having first surfaces exposed to the housing space, respectively, and second surfaces exposed to an outer region of the lower case, respectively; mounting an electric double layer capacitor cell in the housing space such that the electric double layer capacitor cell is electrically connected to the first surfaces of the first and second external terminals exposed to the housing space; and mounting an upper cap on the lower case so as to cover the housing space.

Abstract: There is provided an exhausting device and an energy storage device, including: a housing; a lower valve; an upper valve; a cover; and an elastic member provided between a lower surface of the cover and an upper surface of the opening/closing member to provide a downward pressure to the opening/closing member, and it can appropriately release an increase in an inside pressure due to gas generated inside an energy storage device by the exhausting device, thereby improving reliability of the energy storage device, extending lifespan of the energy storage device, and allowing semi-permanent use of the energy storage device.

Abstract: The present invention provides a chip type electric double layer capacitor including: a lower case having an internal space of which an upper surface is opened and an external terminal of which portions exposed to a bottom of the internal space and the outside are connected to each other; an electric double layer capacitor cell disposed in the internal space of the lower case to be electrically connected to the portion of the external terminal, which is exposed to the bottom of the internal space; and an upper cap mounted on the lower case to cover the internal space, and a method for manufacturing the same.

Abstract: A method of manufacturing the electric double layer capacitor cell includes preparing first and second electrode sheets by printing electrode material onto conductive sheets, respectively, with the exception of regions to be provided as first and second terminal lead-out portions in the conductive sheets; punching the first and second electrode sheets so as to form a plurality of first and second unit electrodes, respectively, each first unit electrode having the first terminal lead-out portion and each second unit electrode having the second terminal lead-out portion; stacking the first and second electrode sheets with a separator interposed therebetween in order that the plurality of first and second unit electrodes are overlapped; and cutting the first and second electrode sheets being stacked into the first and second unit electrodes.

Abstract: The present invention relates to a gas venting structure for an energy storage device including: a bolt consisting of a body and a head and having an outlet inside to pass gas therethrough; a case having a bolt insertion hole inside to insert the bolt therein; and a barrier coupled with the case to block the outlet of the bolt, and an energy storage device including the same.

Abstract: There are provided methods of manufacturing an electric double layer capacitor cell and an electric double layer capacitor and an apparatus for manufacturing an electric double layer capacitor cell.

Abstract: Disclosed herein is an energy storage device. The energy storage device according to an exemplary embodiment of the present invention includes a case providing an internal space with a first space and a second space; an electrolyte solution filled in the internal space of the case; a positive electrode structure disposed on an interface between the first space and the second space and having a cathode active material layer including metal oxide composite; a first negative electrode disposed in the first space and having a first anode active material layer including graphite; and a second negative electrode disposed in the second space and having a second anode active material layer including activated carbon.

Abstract: The present invention relates to an energy storage device. The energy storage device according to an exemplary embodiment of the present invention includes a case providing an internal space with a first space and a second space; an electrolyte solution filled in the internal space of the case; a positive electrode structure disposed on an interface between the first space and the second space and having a cathode active material layer including activated carbon; a first negative electrode disposed in the first space and having a first anode active material layer including graphite; and a second negative electrode disposed in the second space and having a second cathode active material layer including activated carbon.

Abstract: There is provided an electrochemical device and a method for manufacturing the same. The electrochemical device includes: a collector that includes first and second electrodes disposed opposite to each other and an ion transmittable separator disposed therebetween; and a fixing member that surrounds the external surface of the collector and fixes the collector by bending parts formed at both ends. The electrochemical device can minimize the movement of the collector and maximize the overlapping portion between the first and second electrodes, thereby having excellent capacity.

Abstract: There are provided methods of manufacturing an electric double layer capacitor cell and an electric double layer capacitor and an apparatus for manufacturing an electric double layer capacitor cell.

Abstract: There are provided an electric double layer capacitor cell, an electric double layer capacitor package having the same, and methods of manufacturing the same. An electric double layer capacitor cell according to an aspect of the invention may include: a plurality of electric double layer capacitor unit cells stacked upon each other, wherein each of the plurality of electric double layer capacitor unit cells includes first and second current collectors having first and second lead terminal portions, respectively, first and second electrodes provided on the first and second current collectors, respectively, and a separator provided between the first and second electrodes, and the first and second electrode lead terminal portions each are combined into one to provide first and second bonding portions being connected to external terminals provided to apply electricity to the electric double layer capacitor unit cells.

Abstract: There is provided an electric double layer capacitor including: a multilayer electric double layer capacitor cell including first and second electrodes facing each other with an ion-permeable separator interposed therebetween; and an insulating tape with which to enclose an outer surface of the multilayer electric double layer capacitor cell and having a plurality of pores. In the electric double layer capacitor, movements between the first and second electrodes and the ion-permeable separator are minimized so that the area of the facing surfaces of the first and second electrodes increases. Accordingly, high capacitance may be achieved. In addition, the pores formed in the insulating tape facilitate the path of an electrolyte so that the impregnation of the electrolyte into the multilayer electric double layer capacitor cell is thereby facilitated.

Abstract: There is provided a chip-type electric double layer capacitor cell and a method of manufacturing the same. The chip-type electric double layer capacitor cell includes a separator folded to include first and second folded portions with first and second open portions formed in opposite directions by the first and second folded portions, and first and second electrodes inserted into the first and second open portions. The positions of the first and second electrodes are fixed by the first and second folded portions of the separator, and accordingly, the appropriate arrangement of the plurality of first and second electrodes is facilitated. A short circuit between the first and second electrodes is avoided to thereby increase the capacitance of the chip-type electric double layer capacitor cell.

Abstract: There is provided a chip-type electric double layer capacitor including: an exterior case having a housing space provided therein and formed of insulation resin; first and second external terminals buried in the exterior case, each having a plurality of first surfaces exposed to the housing space and a second surface exposed to an outside of the exterior case; and an electric double layer cell electrically connected to the plurality of first surfaces of the first and second external terminals exposed to the housing space. The chip-type electric double layer capacitor may be reduced in size and weight and increased in capacity. Also, the chip-type electric double layer capacitor allows for surface mounting without any additional structure and has low equivalent series resistance (ESR).