Joong Min
Joong Min Lee, Daejeon KR
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20130065094 | METHOD AND SYSTEM FOR COOLING SECONDARY BATTERY - Provided are a method and system for rapidly cooling a lithium secondary battery. A conductive connector is connected to at least one of positive and negative electrode terminals of a lithium secondary battery, and the conductive connector is brought into contact with a coolant to cool battery cells. The coolant may be water or air and may flow a coolant tube formed of a synthetic resin. An end of the coolant tube is fixed to at least one of the positive and negative electrode terminals. Therefore, owing to a cooling means disposed at a side of the lithium secondary battery, the temperature of the lithium secondary battery can be prevented from increasing to a preset value due to abnormal heating, and thermal stability of the lithium secondary battery can be improved by rapid cooling. | 03-14-2013 |
20140000846 | METHOD AND SYSTEM FOR COOLING SECONDARY BATTERY | 01-02-2014 |
Joong Min Lee, Gunpo-Si KR
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20130130075 | ELECTRODE ASSEMBLY FOR SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME - Provided are an electrode assembly for a secondary battery and a lithium secondary battery including the same. The electrode assembly for a secondary battery includes: a positive electrode having a positive electrode coating portion formed on a positive electrode collector; a negative electrode having a negative electrode coating portion formed on a negative electrode collector; and a polyolefin-based separator interposed between the positive and negative electrodes, wherein a PTC (Positive Temperature Coefficient) material layer is formed on the top face of any one of the positive and negative electrode coating portions. Therefore, the PTC material layer plays a role of enabling active material to exhibit constant conductivity regardless of charge or discharge while the batteries are normally operated, and the PTC material layer increases safety properties of the batteries by changing the active material from conductor to nonconductor when temperatures inside the batteries are increased by short circuit or accidents. | 05-23-2013 |
20130130094 | ELECTRODE TERMINAL FOR SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME - Provided is a lithium secondary battery, which includes a rechargeable electrode assembly sealed within an exterior member; and an electrode terminal (a positive terminal or a negative terminal) electrically connected to the electrode assembly, and partially protruded out of the exterior member. A portion of the electrode terminal exposed out of the exterior member is plated with a corrosion resistant metal. The electrode terminal is directly plated with a corrosion resistant metal such as cobalt, copper, nickel, and platinum to improve corrosion resistance thereof, thereby improving the performance of the lithium secondary battery. | 05-23-2013 |
Joong Min Park, Daejeon KR
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20130164801 | METHOD OF PREPARING ALKYL BUTYRATE FROM FERMENTED LIQUID USING MICROORGANISMS - Disclosed is a method of preparing alkyl butyrate, which comprises: (a) producing a fermented liquid containing butyrate salt through a fermentation process using butyric acid-producing strains; (b) obtaining an extracted liquid containing butyric acid from a continuous extracting apparatus using an extraction solvent, after converting the butyrate salt into butyric acid by adding an inorganic acid except for carbonic acid or carbon dioxide into the fermented liquid, wherein the continuous extracting apparatus includes a plurality of extraction plates which are installed inside an extraction column and perform a reciprocating motion vertically, and the broth and the extraction solvent are supplied to upper and lower portions of the column, respectively; and (c) reacting the extracted liquid and alcohol having a carbon number of 4 or less or a mixture thereof in an esterification reactor to convert a resultant product into alkyl butyrate. According to the present invention, butyric acid existing in microbic culture fluid can be efficiently extracted, and furthermore, competitively priced alkyl butyrate can be prepared without an additional process of separating the extracted solvent while minimizing energy consumption. | 06-27-2013 |
Joong Min Park, Seoul KR
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20150140615 | METHOD FOR PREPARING ORGANIC ACID BY FED-BATCH-FEEDING CARBON SOURCE SUBSTRATE AND BASE - The present invention provides a fed-batch culture method comprising a step of fed-batch-feeding a carbon source base and a base in such a manner that the pH level can be maintained at a level suitable for the growth of microorganisms for fermentation of a carbon source. The present invention also provides a method for preparing organic acids using the fed-batch culture method. The present invention fed-batch-feeds a neutralizing agent such as ammonium bicarbonate, ammonium carbonate or alkali metal-containing weak base, and a carbon source substrate in preparing organic acids by microorganism fermentation. Thus, a pH level suitable for the survival of microorganisms for carbon source fermentation can be maintained, and the speed of injecting the carbon source base which is the source material can be appropriately adjusted. The present invention may improve productivity, yield rate and concentration of organic acids and may automatically inject a base and a carbon source substrate according to a variation in the pH level, thus improving reliability and convenience of a fermentation process operation. | 05-21-2015 |