National Science Museum-Eduplus special joint science and engineering conference broadcast in the field
Oh Ji-min, senior researcher at the Korea Electronics and Telecommunications Research Institute, gave a lecture on secondary battery technology
<오지민 한국전자통신연구원이 이자천지 기술을 주제로 강연하고 있다.>
〈Serial order〉
①Promising Big Data for Professional and Biomedical Engineering in 2035
②The world of engineering simulation using supercomputers
③Operation to create a digital earth using satellite constellations
④Invisible infrastructure of the cyber world, Internet technology
⑤The great adventure of multimodal artificial intelligence: go out of this world!
⑥Secondary battery technology, the leading technology of the fourth industrial revolution
⑦The mystery of galaxy formation solved thanks to ultra-high performance computing
⑧Astronomers tracking black holes
⑨The Korean lunar orbiter “Danuri” – development and travel
⑩The secret of nuclear fusion and plasma at 100 million degrees
“The key keyword for the fourth industry, represented by the Internet of Things (IoT), cyber-physical system and artificial intelligence (AI), is to connect and converge people and their surroundings. Robot dogs, portable backup batteries, laptop computers and electric vehicles all have in common the enrichment and convenience of our lives.”
Oh Ji-min, a senior researcher at the Electronics and Telecommunications Research Institute (ETRI), said in a lecture on “Secondary battery technology, a key technology of the fourth industrial revolution”: “Domestic robots perform the role of advisors who understand a person’s condition or mood and the health status of the robot’s owner: “It will play the role of a therapist who provides information and raises alarms,” he said.
What the 4th industrial sector has in common is that it does not stay in one place, but is achieved through movement. Even when people and objects are connected, this occurs in a situation where both people and objects are moving, rather than in an initial stationary state. Secondary battery technology is set to become more important. Unlike primary batteries, which only discharge, they can be charged and discharged. The main technological energy of the Fourth Industrial Revolution is supplied to the environment around us in various forms, such as cylindrical battery-shaped batteries, bag-shaped batteries, and packs that bundle these batteries.
A secondary battery consists of an anode, a cathode, an electrolyte and a separator. The anode is a source of lithium ions, and like in an apartment, lithium ions flow in and out of each floor, determining the battery’s capacity and average voltage. The cathode stores and releases lithium ions from the anode and allows current to flow through an external circuit. The separator blocks the contact between the anode and the cathode.
The electrolyte helps the ions move smoothly. When a large amount of energy is needed, such as in an electric vehicle, this is mounted on the vehicle in the form of a secondary battery pack. The pack consists of 8 to 40 modules and each module consists of 12 to 48 cells (the smallest unit of the secondary battery). Since battery pack performance is important in electric vehicles, the battery management system (BMS) is responsible for monitoring or correcting slightly different performance in the modules or cells.
Secondary batteries still have technical problems such as high capacity and high safety. High capacity means developing secondary batteries that can consume more on a single charge and travel further: it would be convenient if the same auxiliary cell phone battery could be used for a month. High safety refers to a powerful secondary battery technology that does not catch fire and is shockproof.
To increase capacity, Cell develops high-capacity, high-energy-density, high-voltage secondary battery materials. An optimal stacking technology is developed in the parcels so that many cells can be stored in the same space. We are pursuing high capacity by converting the wired connection for BMS operation to a wireless connection to improve signal reliability and provide additional cell loading space.
Senior researcher Oh said: “Recently, ETRI reported the development of a safe material for lithium secondary batteries that does not catch fire easily,” and added: “All-solid-state battery technology, the secondary battery of next generation, has excellent thermal conductivity characteristics and can operate in extremely low temperatures such as Alaska and space environments.”There are great expectations from this technology,” he explained.
Joint planning: Eduplus and National Science Museum
Journalist Ma Song-eun running@etnews.com
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