The present disclosure provides a folding device for manufacturing an electrode assembly having a structure in which plate type unit cells are wound with a separator film, including: a mandrel configured to rotate and wind a web in which plate type unit cells are arranged on an upper surface of the separator film at predetermined intervals so that the unit cells are sequentially stacked with the separator film interposed therebetween; and a pair of rollers configured to horizontally bend a surplus winding end portion of the separator film, which is formed by arranging a first unit cell at a winding start portion of the web in a state of being spaced apart from a winding end portion of the separator film, in a direction covering an upper surface of the first unit cell,
wherein the mandrel includes one or more grippers composed of one or more upper legs configured to fix an upper surface portion of the first unit cell and one or more lower legs configured to fix a lower surface portion of the separator film corresponding to the upper legs, and the pair of rollers operate to vertically bend the surplus winding end portion of the separator film upward and then horizontally bend the surplus winding end portion toward the upper surface of the unit cell.

An electrode assembly includes a radical unit in which electrodes and separators are alternately stacked, the radical unit having a structure in which one electrode is stacked at the uppermost end. An auxiliary unit is provided with a separation sheet disposed at the uppermost end side of the radical unit. The separation sheet includes a separation part disposed at the uppermost end side of the radical unit and a side surface protection part connected to each of side surfaces of the separation part and folded to contact a side portion of the radical unit to cover the side portion of the radical unit.

An electrode assembly, in which a plurality of unit electrodes and a plurality of separators are alternately laminated, is provided. Each of the unit electrodes is provided by connecting a plurality of electrodes, each electrode being entirely made of a solid electrode mixture, to each other, and the solid electrode mixture including a mixture of an electrode active material with at least one or more of a conductive material and a binder.

A battery pack includes a cell group, a spacer, a plurality of bus bars, and a bus bar holder. The cell group includes stacked unit cells, each including a cell body having a power generation element and an electrode tab having distal end portions bent along the stacking direction. The spacer is disposed between adjacent electrode tabs. The bus bars electrically connect the electrode tabs to each other. The bus bar holder that holds the bus bars. The bus bar holder includes a restricting member disposed between adjacent electrode tabs, and extends along the stacking direction to restrict the electrode tabs by sandwiching the electrode tabs with the spacer. Portions of the electrode tabs are welded to a surface of the bus bars facing the unit cells when the stacking direction positions of the portions of the electrode tabs are restricted by the restricting member and the spacer.

The present disclosure provides a battery module capable of stably maintaining contact of electrode leads while having a simple structure and high assemblability. The battery module of the present disclosure includes: a cell assembly including a plurality of secondary batteries and a plurality of cartridges, the secondary batteries being vertically arranged and including electrode leads, the cartridges being vertically stacked to accommodate the secondary batteries in an inner space thereof; and a sensing assembly mounted on a front side of the cell assembly and including an insulation housing formed of an electrically insulative material and a sensing bus bar formed of an electrically conductive material, the sensing assembly being coupled to the electrode leads to sense voltages of the secondary batteries, wherein the insulation housing includes a plurality of penetration holes vertically spaced apart from each other to receive the electrode leads therethrough, and a plurality of housing slant portions arranged in the penetration holes and sloped at a predetermined angle from a horizontal direction.

A battery module is provided. According to an embodiment of the present disclosure, the battery module may include: a cartridge assembly including a plurality of cartridges, each receiving a battery cell; a casing surrounding the cartridge assembly; and a support member configured to enclose the casing for supporting the casing.

An electrode structure for use in an energy storage device, the electrode structure comprising a population of electrodes, a population of counter-electrodes and an electrically insulating material layer separating members of the electrode population from members of the counter-electrode population, each member of the electrode population having a longitudinal axis A.sub.E that is surrounded by the electrically insulating separator layer.

Provided is a method of manufacturing a laminated secondary battery in which in the battery cell laminate in which the electrode cells are laminated, one full cell manufactured by the heat fusion process is laminated, and each unit electrode cell is laminated between each of the full cells to form one electrode assembly, thereby simplifying a manufacturing process, minimizing reworking due to defective electrode cells and minimizing an initial investment cost. To this end, provided is a method of manufacturing a laminated secondary battery having a structure in which two or more unit cells (a), an electrode cell (b), and an electrode cell (c) are cross stacked, including: 1) preparing a unit full cell, wherein the unit cell (a) is composed of a separation membrane/a cathode cell/a separation membrane/a anode cell/a separation membrane; 2) preparing an anode unit cell by the electrode cell (b) and a cathode unit cell by the electrode cell (c); and 3) sequentially laminating the unit cell (a), the electrode cell (b), the flipped-over unit cell (a), and the electrode cell (c), wherein the laminated uppermost electrode has a structure in which electrodes having the same polarity as the lowermost polarity of the unit cell (a) are laminated, and wherein the laminate completed with the lamination is wrapped with the outer film, and the film end portion is fixed by the tape or the heat fusion.

A method of vertically assembling encapsulated single microbatteries, wherein the vertical assembly contains, between the microbatteries, an electrical insulation and/or sealing layer and a metal layer, successively including: a step of stacking and attaching at least two single microbatteries, previously encapsulated, stacked on each other; and forming a metal layer, capable of ensuring the electrical coupling of each of the metal layers of each of the encapsulated single microbatteries. Each of the at least two encapsulated single microbatteries is previously prepared by: forming at least one electrical insulation and/or sealing layer over at least a portion of the lateral sides and of the surface including the current collectors of a microbattery including positive and negative electrodes, an electrolyte, and positive and negative current collectors; making the current collectors of the microbattery accessible; and forming a metal layer extending from the current collectors to the lateral sides of said microbattery.

Provided is a method of manufacturing a laminated secondary battery in which in the battery cell laminate in which the electrode cells are laminated, one full cell manufactured by the heat fusion process is laminated, and each unit electrode cell is laminated between each of the full cells to form one electrode assembly, thereby simplifying a manufacturing process, minimizing reworking due to defective electrode cells and minimizing an initial investment cost. To this end, provided is a method of manufacturing a laminated secondary battery having a structure in which two or more unit cells (a), an electrode cell (b), and an electrode cell (c) are cross stacked, including: 1) preparing a unit full cell, wherein the unit cell (a) is composed of a separation membrane/a cathode cell/a separation membrane/a anode cell/a separation membrane; 2) preparing an anode unit cell by the electrode cell (b) and a cathode unit cell by the electrode cell (c); and 3) sequentially laminating the unit cell (a), the electrode cell (b), the flipped-over unit cell (a), and the electrode cell (c), wherein the laminated uppermost electrode has a structure in which electrodes having the same polarity as the lowermost polarity of the unit cell (a) are laminated, and wherein the laminate completed with the lamination is wrapped with the outer film, and the film end portion is fixed by the tape or the heat fusion.