Pouch-type secondary battery
A secondary battery, pouch-type technology, applied in battery pack components, battery boxes/jackets, large-sized batteries/battery packs, etc., can solve problems such as poor appearance and increased volume of secondary battery modules, and achieve improved volume Increases, improves appearance, and prevents chattering
Active Publication Date: 2019-07-09
SK ON CO LTD
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Problems solved by technology
[0008]
In addition, another object of the present invention is to provide a pouch-type secondary battery that can fold the sealing portion of the pouch-type secondary battery, thereby improving problems such as increased volume and poor appearance of the secondary battery module due to the sealing portion. question
Method used
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[0047] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. However, these are merely illustrative examples, and the present invention is not limited thereto.
[0048] In describing the embodiments of the present invention, well-known arts that are judged to unnecessarily obscure the object of the present invention will not be described in detail. Referring to the drawings, wherein the same reference numerals designate the same or corresponding parts in the various drawings. Also, the terms used herein are defined by considering the functions of the present invention, and may be changed according to user's or operator's habit or intention. Therefore, definitions of terms should be made according to the overall inventive content set forth herein.
[0049] It should be understood that the technical spirit and scope of the present invention are defined by the appended claims, and the following embodiments are ...
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Abstract
One embodiment of the present invention relates to a pouch-type secondary battery. According to one embodiment of the present invention, provided is a pouch-type secondary battery comprising: a casingfor receiving an electrode assembly having a drawn-out electrode tab; a sealing part formed by means of the casing being bonded along the external edges of the electrode assembly; and a folding parthaving folded thereat the sealing part on the surface where the electrode tab drawn-out towards the outside of the casing is not formed, wherein the length of the folded folding part satisfies the following relational expression with the thickness of the electrode assembly. H<=T / 2 (Based on the cross-section in the direction vertical to the direction in which the electrode tab of the electrode assembly is drawn-out, H is the length of the folded folding part, and T is the thickness of the electrode assembly.)
Description
technical field [0001] Embodiments of the present invention relate to a pouch type secondary battery. Background technique [0002] With the development of the most advanced technology fields such as digital cameras, mobile phones, notebook computers, and hybrid vehicles, research on rechargeable secondary batteries that can be charged and discharged is actively carried out. Examples of the secondary battery include nickel-cadmium batteries, nickel metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries. Among them, a lithium secondary battery having an operating voltage of 3.6 V or higher is used as a power source of a portable electronic device, or is used in a high-output hybrid car by connecting a plurality of lithium secondary batteries to each other in series. Since the operating voltage of lithium secondary batteries is three times higher than that of nickel-cadmium batteries or nickel metal hydride batteries, and is superior to nickel-cad...
Claims
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IPC IPC(8): H01M2/02H01M2/08H01M2/10H01M50/105H01M50/119H01M50/121H01M50/124H01M50/131H01M50/136H01M50/178H01M50/186H01M50/548H01M50/557
CPCY02E60/10H01M50/557H01M50/105H01M50/186H01M50/119H01M50/136H01M50/178H01M50/548H01M50/121H01M50/124H01M50/131Y02P70/50H01M50/193H01M50/198
Inventor 金泰日金镇高李承鲁
Owner SK ON CO LTD