Abstract: A secondary battery comprising a battery package which encloses the outer perimeter of the secondary battery and covers the entire outer surface of positive and negative electrodes and a portion of each terminal of the positive and negative electrodes, wherein the battery package is formed of a laminate film comprising an outer polymer layer, an inner aluminum layer and an adhesive layer formed on a portion of the inner surface of the aluminum layer, the aluminum layer of the battery package being electrically connected with either of the positive and negative is provided. Alternatively, at least one electrically conductive metal foil on at least one of the outer upper and lower surfaces of the battery package is provided.

Abstract: The present invention relates to a method of manufacturing an electrode assembly, the method including: preparing an electrode laminate including at least one negative electrode, at least one positive electrode, and at least one separation film; generating a separation film assembly by bonding remaining portions of the separation film positioned in regions not corresponding to shapes of the negative electrode and the positive electrode; and cutting the separation film assembly so as to correspond to the shapes of the negative electrode and the positive electrode, and an electrode assembly manufactured by the method.

Abstract: Disclosed is an inner case of a battery module assembly in which four battery modules, each having a plurality of cylindrical secondary battery cells (hereinafter, also referred to as ‘cells’), are electrically connected in series. The inner case includes a side frame making contact with two facing sides among sides of the battery module assembly, an upper frame making contact with an upper surface of the battery module assembly, and an electrode post electrically connected to an electrode of the battery module assembly and located at a top of the upper frame. Therefore, it is possible to provide an inner case of a stable and economic battery module including a plurality of secondary battery cells.

Abstract: Disclosed are a non-aqueous electrolyte comprising a lithium salt and a solvent, the electrolyte containing, based on the weight of the electrolyt, 10-40 wt % of a compound of Formula 1 or its decomposition product, and 1-40 wt % of an aliphatic nitrile compound, as well as an electrochemical device comprising the non-aqueous electrolyte.

Abstract: Provided is a jelly-roll type electrode assembly pattern-coated with active materials manufactured by winding and compressing a separator and an anode and a cathode arranged on both sides of the separator. The anode includes anode flat coated portion coated with an anode active material and anode curved uncoated portion not coated with the anode active material, which are alternately formed. The cathode includes a cathode flat coated portion coated with a cathode active material and a cathode curved uncoated portion not coated with the cathode active material, which are alternately formed.

Abstract: A battery warm up system according to the present disclosure includes an open signal receiving unit to receive a door open signal for opening a door of a vehicle, a temperature measuring unit to measure a temperature of a battery pack connected to a starter of the vehicle, a control unit to output a forced discharging start signal by referring to information associated with the temperature measured by the temperature measuring unit when the door open signal is received by the open signal receiving unit, and a forced discharging circuit unit to force a plurality of battery modules constituting the battery pack to be discharged in response to the forced discharging start signal.

Abstract: Disclosed is a battery module assembly for a vehicle's battery pack, which has four battery modules, among which two battery modules are arranged in parallel and two battery modules are stacked and provided on the two battery modules arranged in parallel, wherein cylindrical secondary battery cells respectively included in the battery modules are electrically connected in parallel by means of plates respectively disposed at tops of the two battery modules arranged in parallel, wherein the two battery modules arranged in parallel are electrically connected in parallel by means of a lower metal plate disposed on the two battery modules arranged in parallel, wherein cylindrical secondary battery cells respectively included in the battery modules are electrically connected in parallel by means of metal plates respectively disposed at tops and bottoms of the two battery modules stacked on the two battery modules arranged in parallel, and wherein the four battery modules are electrically connected in series.

Abstract: Disclosed is a battery module, which includes a plurality of cylindrical secondary battery cells (hereinafter, also referred to as ‘cells’), an upper frame having a plurality of grooves formed corresponding to an appearance of the cells, the grooves being opened to expose electrodes of the cells outwards, and a lower frame having a plurality of grooves formed corresponding to the appearance of the cells, the grooves being opened to expose electrodes of the cells outwards, wherein cell stoppers are formed at tops of the grooves formed in the upper frame and bottoms of the grooves formed in the lower frame to partially cover the tops and the bottoms of the cells so that the cells are not separated from the grooves. Therefore, it is possible to provide a battery module which may ensure mechanically stable connection when configuring an assembly including a plurality of battery modules.

Abstract: Disclosed are a non-aqueous electrolyte comprising a lithium salt and a solvent, the electrolyte containing, based on the weight of the electrolyte, 10-40 wt % of a compound of Formula 1 or its decomposition product, and 1-40 wt % of an aliphatic nitrile compound, as well as an electrochemical device comprising the non-aqueous electrolyte. Also disclosed is an electrochemical device comprising: a cathode having a complex formed between the surface of a cathode active material and an aliphatic nitrile compound; and an anode having formed thereon a coating layer containing a decomposition product of the compound of Formula 1. Moreover, disclosed is an electrochemical device comprising: a cathode having a complex formed between the surface of a cathode active material and an aliphatic nitrile compound; and a non-aqueous electrolyte containing the compound of Formula 1 or its decomposition product.

Abstract: A power source for vehicles according to the present disclosure includes a secondary battery pack to support power required to start up a vehicle and power required for an electronic device equipped in the vehicle together, and having an operating voltage range of 9V to 19V in which a maximum operating voltage ranges from 16V to 19V and an average voltage is higher than or equal to 12V, and an alternator to produce a charging power for the secondary battery pack in response to operation of an engine of the vehicle.

Abstract: There are provided an electrode assembly, and a battery cell, a battery pack, and a device. The electrode assembly includes a combination of two or more types of electrode units having different areas, wherein the electrode units are stacked such that steps are formed, and electrode units are formed such that a positive electrode and a negative electrode face one another at an interface between the electrode units.

Abstract: There is provided an electrode assembly. The electrode assembly includes a stack of unit cells respectively including at least one negative electrode and at least one positive electrode, alternately stacked, wherein at least one separator is placed on each of both sides of the electrodes, and at least one of the unit cells has an area different from that of an adjacent unit cell to form at least one stepped portion on the electrode assembly. In addition, there are also provided a battery cell, a battery pack, and a device that include the electrode assembly.

Abstract: There are provided a method of manufacturing a jelly roll-type electrode assembly and a method of manufacturing a secondary battery using the electrode assembly. The method of manufacturing the electrode assembly includes notching a cathode and an anode, elongated in one direction, in a constant size and shape to form a plurality of electrode units, laminating the cathode and the anode with a separator disposed therebetween to form a unit cell, and winding the unit cell by bending the connection units so that the electrode units of the cathode and the anode overlap each other. In the manufacturing of the jelly roll-type electrode assembly and the polymer secondary battery, whose production process can be easily simplified a jelly roll-type electrode assembly and a polymer secondary battery, both of which exhibit excellent design flexibility, can be manufactured.

Abstract: There are provided an electrode assembly, and a battery cell, a battery pack, and a device. The electrode assembly includes a combination of two or more types of electrode units having different areas, wherein the electrode units are stacked such that steps are formed, and electrode units are formed such that a positive electrode and a negative electrode face one another at an interface between the electrode units.

Abstract: A battery warm up system according to the present disclosure includes a battery state measuring unit to measure a state of charge (SOC) of each module of a battery pack of a vehicle, a control unit to optionally output a forced discharging start signal and to output a balancing start signal, a forced discharging circuit unit to force at least one battery module among a plurality of battery modules of the battery pack to be discharged in response to the forced discharging start signal, and a balancing unit to balance the SOC of each of the battery modules in response to the balancing start signal.

Abstract: Disclosed is a porous film comprising: (a) a porous substrate having pores; and (b) a coating layer formed on at least one region selected from the group consisting of a surface of the substrate and a part of the pores present in the substrate, wherein the coating layer comprises styrene-butadiene rubber. An electrochemical device using the porous film as a separator is also disclosed. The porous film is coated with a styrene-butadiene polymer, whose rubbery characteristics can be controlled, and thus provides improved scratch resistance and adhesion to other substrates. When the porous film is used as a separator for an electrochemical device, it is possible to improve the safety of the electrochemical device and to prevent degradation in the quality of the electrochemical device.

Abstract: There are provided an electrode assembly, and a battery cell, a battery pack, and a device. The electrode assembly includes a combination of two or more types of electrode units having different areas, wherein the electrode units are stacked such that steps are formed, and electrode units are formed such that a positive electrode and a negative electrode face one another at an interface between the electrode units.

Abstract: There are provided an electrode assembly, a battery cell including the electrode assembly, and a device including the electrode assembly. The electrode assembly includes a combination of two or more electrode units having the same width and different lengths, wherein the electrode units are stacked so that a stepped portion is formed between the electrode units, and electrodes having different polarities face each other at an interface between the electrode units.

Abstract: There is provided an electrode assembly having increased degrees of structural freedom in the thickness direction thereof. The electrode assembly includes negative and positive electrodes alternately stacked with separators interposed therebetween, wherein the electrode assembly is formed by stacking N electrode stacks where N is a natural number equal to or greater than 2, each of the electrode stacks comprises electrodes having the same area and stacked with separators interposed therebetween, and neighboring electrode stacks of the electrode stacks have different electrode areas, wherein a first electrode stack of the electrode stacks is formed by stacking unit cells respectively including an odd number of electrodes, and the other electrode stacks stacked on the first electrode are formed by stacking unit cells respectively including an even number of electrodes.

Abstract: Provided is a jelly-roll type electrode assembly pattern-coated with active materials manufactured by winding and compressing a separator and an anode and a cathode arranged on both sides of the separator. The anode includes anode flat coated portion coated with an anode active material and anode curved uncoated portion not coated with the anode active material, which are alternately formed. The cathode includes a cathode flat coated portion coated with a cathode active material and a cathode curved uncoated portion not coated with the cathode active material, which are alternately formed.