Electrode assembly, and secondary battery comprising same
An electrode assembly, electrode technology, applied in the direction of electrode current collector coating, electrode carrier/current collector, non-aqueous electrolyte battery, etc., can solve the problems of battery characteristics and yield deterioration, electrode crack generation, etc. Effect
Active Publication Date: 2019-04-16
SAMSUNG SDI CO LTD
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Problems solved by technology
Therefore, when the electrode assembly of the wound structure is manufactured, since the radius of rotation becomes smaller as the winding axis thereof is approached, cracks are generated in the electrode, thereby deteriorating the characteristics and yield of the battery
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[0031] Hereinafter, the present invention will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the scope of the present invention.
[0032] The drawings and descriptions are to be regarded as illustrative in nature and not restrictive. Throughout the specification, the same reference numerals refer to the same elements.
[0033] Throughout the specification and the appended claims, when it is described that an element is "coupled" to another element, the element may be "directly coupled" to the other element or "indirectly coupled" to the other element through a third element. another element. Furthermore, unless expressly stated to the contrary, the word "comprise" and variations such as "comprises" or "comprises" will be understood to imply the inclusion of ...
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Abstract
An electrode assembly according to an embodiment of the present invention has a first electrode including a first electrode activation part and a first uncoated electrode part, a separator, and a second electrode including a second electrode activation part and a second uncoated electrode part being stacked and wound around a winding axis, wherein the first electrode activation part comprises a first small electrode part including a first substrate and first active material layers respectively formed on both surfaces of the first substrate, and a second small electrode part including an exposed surface of the first substrate, wherein the first active material layer is formed on the other surface of the first substrate, and wherein the second small electrode part is located in a first curved surface part that is created by first rotation of the electrode assembly.
Description
technical field [0001] The present invention relates to an electrode assembly, and more particularly, to an electrode assembly for a rechargeable battery and a rechargeable battery including the electrode assembly. Background technique [0002] A rechargeable battery is an energy storage system that converts electrical energy into chemical energy to store it with excellent energy density. Unlike primary batteries, which cannot be recharged, rechargeable batteries are widely used in information technology (IT) devices such as smartphones, laptops, tablets, etc. because they can be recharged. [0003] Recently, attention to electric vehicles has been increasing due to problems such as environmental degradation and depletion of fossil fuels, and such rechargeable batteries are used as batteries for electric vehicles. According to this trend, rechargeable batteries are required to have characteristics such as high energy density, high power, high safety, and the like. [0004]...
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IPC IPC(8): H01M10/04H01M10/0587
CPCH01M10/0587H01M10/0431H01M10/052Y02E60/10H01M4/0404H01M4/66H01M10/0525
Inventor 尹东植安二燮安滈镕李廷炫林明德郑惠先韩承勋
Owner SAMSUNG SDI CO LTD