About 634 results
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https://drivepatents.com/patents/1399573 · 6 May 2026
The present application can provide a light modulating device that can stably maintain designed optical properties even after an encapsulation process in which a pressure is applied, such as an autoclave process, an optical device or a manufacturing method...
https://drivepatents.com/patents/1400182 · 6 May 2026
Disclosed is a separator for a lithium secondary battery including a porous polyolefin substrate and showing a tan(δ) of 0.3 or less in the storage-loss modulus curve. Also disclosed is an electrochemical device including the separator. The separator show...
https://drivepatents.com/patents/1388093 · 15 Apr 2026
The present invention relates to an evaluation device and an evaluation method for the thermal shrinkage of a separator, which enable the thermal shrinkage of a separator to be easily evaluated.
https://drivepatents.com/patents/1399742 · 1 Apr 2026
The present application relates to a light modulating device. The present application can provide a light modulating device applicable to various applications by controlling omnidirectional light leakage in a black mode while having excellent optical prope...
https://drivepatents.com/patents/1395319 · 18 Mar 2026
The present invention provides a method for analysis of residual lithium compounds in a positive electrode active material for a lithium secondary battery, the method for analysis comprising the steps of: analyzing a sample of a positive electrode active m...
https://drivepatents.com/patents/1398784 · 18 Feb 2026
Disclosed is a separator for a lithium secondary battery, including: a porous polymer substrate; and a hydrophilic modification layer disposed inside of the porous polymer substrate, or disposed inside of the porous polymer substrate and on at least one su...
https://drivepatents.com/patents/1387679 · 21 Jan 2026
The present invention relates to a non-aqueous electrolyte solution that may improve high-temperature stability and life characteristics of a lithium secondary battery by forming a thin and stable SEI layer, wherein it relates to a non-aqueous electrolyte ...
https://drivepatents.com/patents/1400338 · 31 Dec 2025
The present invention relates to a positive electrode active material precursor, which has a composition represented by Formula 1 or Formula 2 and includes a first region formed in a center of a particle of the positive electrode active material precursor,...
https://drivepatents.com/patents/1393815 · 28 May 2025
The present disclosure relates to a manufacturing method of a cathode additive for a lithium secondary battery. In the present disclosure, there is provided a manufacturing method of a cathode additive for a lithium secondary battery having excellent air s...
https://drivepatents.com/patents/938444 · 31 Aug 2016
Disclosed are: a frame for secondary batteries, which ensures a channel around cooling plates stably to improve cooling efficiency for secondary batteries; and a battery module, a battery pack and a vehicle comprising the same. A frame for secondary batter...