KR-20260067823-A - Secondary battery and battery box including the same

KR20260067823AKR 20260067823 AKR20260067823 AKR 20260067823AKR-20260067823-A

Abstract

The present invention relates to a secondary battery and a battery box including the same. A secondary battery according to one aspect of the present invention may include an electrode assembly extending in one direction; a cap covering one side of the extension direction of the electrode assembly; an outer film wrapping the other side of the electrode assembly; and an insulating member provided between the cap and the electrode assembly.

Inventors

이재호
김상훈
최지은
이민규

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (16)

Electrode assembly extended in one direction; A cap covering one side in the extension direction of the above electrode assembly; An outer film covering the other side of the electrode assembly; and A secondary battery comprising an insulating member provided between the above cap and the above electrode assembly.
In Article 1, The above insulating member is a secondary battery that extends in the width direction perpendicular to the length direction of the electrode assembly.
In Article 2, A secondary battery in which the cross-section of the above-mentioned insulating member is circular or elliptical.
In Article 2, To conduct electricity to the outside of the above electrode assembly, it further includes a terminal that is coupled through the cap, and An electrode tab assembly extending from the electrode assembly is coupled to the above terminal, and A secondary battery in which the corresponding surface facing the electrode tab assembly from the above insulating member is formed as a curved surface.
In Article 2, The cross-section of the above-mentioned insulating member has a polygonal shape, a secondary battery.
In Article 5, To conduct electricity to the outside of the above electrode assembly, it further includes a terminal that is coupled through the cap, and An electrode tab assembly extending from the electrode assembly is coupled to the above terminal, and A secondary battery in which a corresponding surface provided on one side of the above polygonal shape is arranged to face the outer surface of the electrode tab assembly.
In Article 6, The above-mentioned corresponding surface is a secondary battery arranged parallel to the above-mentioned outer surface of the above-mentioned electrode tab assembly.
In Article 6, The cross-section of the above-mentioned insulating member is a right triangle, and A secondary battery in which a corresponding surface provided on the hypotenuse of the above right triangle is arranged to face the outer surface of the electrode tab assembly.
In Article 1, To conduct electricity to the outside of the above electrode assembly, it further includes a terminal that is coupled through the cap, and An electrode tab assembly extending from the electrode assembly is coupled to the above terminal, and The above-mentioned insulating member is, A secondary battery comprising an upper insulating member and a lower insulating member positioned opposite each other with the above electrode tab assembly in between.
In Article 9, The above upper insulating member is a secondary battery provided in multiple units.
In Article 9, The above upper insulating member is a secondary battery having a spherical shape.
In Article 9, The above upper insulating member has a shape different from the above lower insulating member, in a secondary battery.
In Article 1, The above-mentioned insulating member comprises at least one of plastic and ceramic, a secondary battery.
In Article 1, The above caps are provided in pairs and each cover both sides in the longitudinal direction of the electrode assembly, in a secondary battery.
In Article 14, The above insulating member is a secondary battery, each provided between the pair of caps and the electrode assembly.
Packaging; and Includes a secondary battery housed in the above packaging, The above secondary battery is, Electrode assembly extended in one direction; A cap covering one side in the extension direction of the above electrode assembly; An outer film covering the other side of the electrode assembly; and A battery box comprising an insulating member provided between the above cap and the above electrode assembly.

Description

Secondary battery and battery box including the same The present invention relates to a secondary battery and a battery box including the same, and more specifically, to a secondary battery capable of charging and discharging electrical energy and a battery box including the same. Although secondary batteries have been applied to small-scale fields such as mobile devices and laptop computers, recently the direction of research has expanded to medium and large-scale fields, and they are widely used in fields requiring high voltage and large capacity, such as Energy Storage Systems (ESS) and Electric Vehicles (EV). Meanwhile, as secondary batteries are utilized in various devices, the demand for their stability is increasing. To enhance the stability of secondary batteries, it is necessary to control the direction in which internal gases or flames are discharged during abnormal situations where the battery's temperature or pressure rises. This is because controlling the discharge direction of gases or flames allows for the suppression or control of thermal transfer or thermal runaway phenomena. FIG. 1 is a perspective view of a secondary battery according to a first embodiment of the present invention, viewed from above. FIG. 2 is an exploded perspective view of a secondary battery according to a first embodiment of the present invention. Figure 3 is a cross-sectional view according to II of Figure 1. FIG. 4 is a cross-sectional view of a secondary battery according to a second embodiment of the present invention, cut according to II of FIG. 1. FIG. 5 is a cross-sectional view of a secondary battery according to the third embodiment of the present invention, cut according to II of FIG. 1. FIG. 6 is a cross-sectional view of a secondary battery according to the fourth embodiment of the present invention, cut according to II of FIG. 1. FIG. 7 is a cross-sectional view of a secondary battery according to the fifth embodiment of the present invention, cut according to II of FIG. 1. FIG. 8 is a cross-sectional view of a secondary battery according to the 6th embodiment of the present invention, cut according to II of FIG. 1. Preferred embodiments of the present invention are described in detail so that those skilled in the knowledge can easily implement them. However, the present invention may be embodied in various different forms and is not limited or restricted by the following embodiments. In order to clearly explain the present invention, detailed descriptions of related prior art that are irrelevant to the explanation or that may unnecessarily obscure the essence of the invention have been omitted. Furthermore, when assigning reference numerals to the components of each drawing in this specification, identical or similar reference numerals are assigned to identical or similar components throughout the entire specification. In addition, terms or words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. FIG. 1 is a perspective view of a secondary battery according to a first embodiment of the present invention viewed from above. FIG. 2 is an exploded perspective view of a secondary battery according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line I-I of FIG. 1. FIGS. 1 to 3 disclose a secondary battery according to a first embodiment of the present invention. Referring to FIGS. 1 to 3, the secondary battery (1) according to the first embodiment of the present invention may be a secondary battery for charging and discharging electrical energy. To this end, a secondary battery (1) according to one embodiment of the present invention may include an electrode assembly (10). The electrode assembly (10) may be an assembly composed of an electrode and a separator. The electrode assembly (10) may be extended forward and backward (in the X-axis direction). In the following, the above direction is named the length direction (or extension direction) of the electrode assembly (10), the direction wrapping around the above length direction (X-axis direction) is named the circumference direction of the electrode assembly (10), and the left and right direction (Y-axis direction) perpendicular to the above length direction (X-axis direction) is named the width direction of the electrode assembly (10). The electrode may consist of a foil-shaped current collector made of copper (Cu) or aluminum (Al) and an electrode active material layer provided on one or both sides of the current collector. The separator may be made of an insulating material. An all-solid-state may be used in place of the separator. The materials of the current collector, the electrode active material layer, and the