Disclosed herein is a battery case including a receiving part having an electrode assembly mounted therein, wherein the receiving part, which is formed by deforming a sheet type base material, is configured to have a stair-like structure in which at least one corner and/or surface forming a shape of the receiving part is deformed.

Battery case for secondary battery

Provided is a secondary battery with improved safety through filling a polymer in a hardened state, and a method of manufacturing the same. The method of manufacturing a secondary battery according to the present disclosure includes preparing a polymer slurry by adding a polymer particle to an electrolyte solution, injecting the polymer slurry to a battery casing in which an electrode assembly is received, changing the polymer slurry to a polymer solution by heating the battery casing, and hardening the polymer solution by cooling the battery casing.

Secondary battery and method for manufacturing the same

Provided is a secondary battery including integrated anode and cathode leads and a method of manufacturing the same. An anode lead and a cathode lead of a secondary battery aligned to be parallel with respect to each other are encompassed by a single lead film. Thus, sealing may be easily implemented, lead film components may be managed as one component, and vibrations of an electrode lead may be prevented.

Secondary battery including integrated anode and cathode leads and method of manufacturing the same

Disclosed herein is a battery cell configured to have a structure in which a stacked structure including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode is mounted in a receiving part of a battery case, one or more holes are formed from the battery case to the positive electrode or the negative electrode of the electrode assembly, and a transparent window is formed in a portion of the battery case corresponding to the holes.

Battery cell having hole

The present invention relates to a jelly-roll type electrode assembly having improved structure, and more specifically, to a jelly-roll type electrode assembly designed to form an areal or gradual gradient of the loading amount of an active material, and effectively disperse stress caused by expansion of a battery when charging and discharging the battery after winding a jelly roll. According to the present invention, the jelly-roll type electrode assembly loads a relatively small amount of the electrode active material at the center of the electrode assembly in a jelly-roll shape, thereby solving stress while winding, and preventing bending of the jelly-roll. Also, since power caused by expansion of the electrode active material while charging and discharging the battery is not concentrated at the center, the electrode can prevent degradation of performance caused by damage.

A cell assembly with improved jelly-roll type structure and a secondary battery comprising the same

Disclosed herein are a battery cell including an electrode assembly configured to have a structure including cathodes, anodes, and separators respectively disposed between the cathodes and the anodes, the electrode assembly being provided with a through hole in a direction in which the electrodes are stacked, and a battery case provided at each side thereof with an opening communicating with the through hole and a battery pack including the same.

Compact battery cell having improved durability and battery pack comprising the same

PURPOSE: A battery cell can be equipped with electronic parts in a space in which a through hole and an opening are connected to each other, prevents internal short due to external impact, and to minimize the deformation of the battery cell by external impact. CONSTITUTION: A battery cell (100) comprises an electrode assembly in which a positive electrode, a negative electrode, and a separator inserted between the positive electrode and negative electrode are formed and through holes are formed in the laminating direction of electrodes; and a battery case (110) in which an opening (112) connected to the through hole is formed on both sides thereof. The electrode assembly consists of a rolled structure, a stacked structure, or a stack/folding structure. The electrode assembly is circular, oval, or polygonal.

Battery cell havig through hole and battery pack comprising the same

PURPOSE: A secondary battery is provided to improve the stability of battery by preventing the contact of an electrode tap and a joint part of electrode lead with a battery case by an insulating layer formed on inside of the battery case. CONSTITUTION: A secondary battery comprises a battery case(120) of a laminate sheet comprising a metal layer and a resin layer, in which an electrode assembly(130) of a positive electrode/a separator/a negative electrode. Electrode tabs of the electrode assembly is combined to the end of the opposite side of electrode leads(170,180) which projected to outside of the battery case to form electrode terminals. An insulating layer(200) is formed on the inside of the battery case at the position corresponding with an electrode tab-lead joint part(190).

Secondary battery of improved insulating properties

PURPOSE: An electrode assembly is provided to easily remove gas generated during an activation process by through-holes formed on a positive electrode and/or a negative electrode, thereby remarkably improving battery stability. CONSTITUTION: An electrode assembly comprises: a positive electrode(20) including a positive electrode active material(22) coated on one side or both sides of a current collector; a negative electrode including a negative electrode active material layer coated on one side or both sides of the current collector; a separator inserted between the positive electrode and negative electrode; and two or more through-holes(12) punched on the positive electrode and/or negative electrode to allow gas generated during initial charging and discharging, to pass through. The through-holes connect the electrode active material layer and current collector to each other.

Electrode assembly of improved stability and secondary battery the same

PURPOSE: A battery cell is provided to restrain protrusion of a lead film when an electrode lead is bent in contact with the outside of a battery case, and to increase efficiency and processability of a battery pack-production process while ensuring the safety of a battery pack. CONSTITUTION: In a battery cell(100), the outer circumference of a battery case(200) is hotmelt-sealed in state an electrode assembly(300) is mounted in a battery case(200), the electrode terminals(301,302) of the electrode assembly are electrically connected to electrode leads(400,410), lead films(500,510), which have more width than the width of the top and bottom of an outer circumference-sealing part(210), are inserted between the outer-circumference sealing part of the battery case and the electrode lead. A recess part(250) accommodating an upper surplus part of the lead film is formed on the outside of the battery case when the electrode leads are bent in contact with the outside of the battery case.

Battery cell of novel structure and battery pack employed with the same

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