Patent EP-3591679-A1 (EP)
Inventor: JEONG YUN CHEOL
IPC: H01G11/70
Filed: 2018-02-27
Abstract: The present invention relates to an electric double layer capacitor basic cell having a separator-including electrode, the cell having improved conductivity of an electric double layer capacitor basic cell by using a separator-including electrode without a separation membrane so as to have excellent electric energy storage and output performance. In addition, the present invention relates to an electric double layer capacitor cell having a separator-including electrode, the cell allowing a plurality of electrode pairs to be stacked such that current collector plates of the same polarity are connected and allowing the current collector plates of the plurality of stacked electrode pairs connected while having the same polarity to be mutually connected, thereby having improved electric energy storage density and output performance of an electric double layer capacitor cell. In addition, the present invention relates to an energy storage device in which electric double layer capacitor cells having a separator-including electrode are connected in series, the device having a plurality of electric double layer capacitor cells connected in series without an external separate circuit board so as to reduce characteristic distortion caused by an increase in contact resistance, thereby remarkably reducing the necessity of a separate correction circuit. The electric double layer capacitor basic cell having a separator-including electrode of the present invention can be formed by using a current collector plate and an electrode, which comprises a separator convexly protruding from the current collector plate with a continuous pattern of a certain design so as to form a convex shape having a pattern repeated in lengthwise and widthwise directions of the current collector plate, or convexly protruding with a pattern continuous in the lengthwise direction of the current collector plate, and having a pattern repeated in the widthwise direction of the current collector plate. The electric double layer capacitor basic cell having a separator-including electrode, according to the present invention, reduces the distance between facing electrodes so as to improve conductivity over that of a conventional electric double layer capacitor basic cell, thereby having excellent electric energy storage and output performance. The electric double layer capacitor cell having a separator-including electrode, of the present invention, allows electrode pairs of the plurality of double layer capacitor basic cells having a separator-including electrode, of the present invention, to be stacked by alternating such that the electrode pairs of the same polarity are connected by adjoining and coming in contact with each other, and thus compared with conventional stacked electrode pairs and electric double layer capacitor cells stacked between the electrode pairs by using a separation membrane, stacked electrode pairs are increased so as to improve electric energy storage and output performance because of the improvement in conductivity and improve electric energy storage density. In addition, since a plurality of separation membranes are unnecessary, quality issues are improved and manufacturing costs are reduced. In addition, the energy storage device having, connected in series, electric double layer capacitor cells having a separator-including electrode, according to the present invention, allows, within an energy storage device container, a front surface of an anode current collector plate at ends of the plurality of electric double layer capacitor cells having a separator-including electrode, of the present invention, to be connected to a front surface of a cathode current collector plate at a starting end of another electric double layer capacitor cell having a separator-including electrode, of the present invention, which is adjoined and connected with the capacitor cell in series such that the connected elements are connected in series within the energy storage device container, and thus compared with that of a conventional energy storage device having a plurality of electric double layer capacitor cells connected in series by using a separate external circuit board, characteristic distortion caused by an increase in connection resistance according to an external circuit board connection is remarkably reduced so as to remarkably reduce the necessity of a separate correction circuit and improve the durability limit due to the use of an external circuit board. In addition, instruments, which were necessary for protecting an external circuit, are not required, and thus the present invention has an excellent effect of reducing manufacturing costs and improving durability.