Technology has emerged that reduces the charging time for electric vehicles (EVs) to around three minutes. On the 15th, Gwangju Advanced Institute of Science and Technology announced that a research team led by Professor Lee Seung-hyun of the Department of Mechanical and Robotics Engineering has developed a charging cable cooling technology that can reduce the battery charging time of a high-performance EV (when a 100 kilowatt-hour (kWh) class battery is 80% charged) to within 3 minutes and 20 seconds, the same time it takes to refuel an internal combustion engine vehicle. Until now, it took more than 30 minutes for an EV to charge even with rapid charging. This is because the insulating coating of the charging cable does not allow heat to escape well, limiting the amount of heat that can be released from inside, and no effective cooling technology has yet been found. Professor Lee’s research team discovered a way to use supercooled flow boiling to promote the generation of bubbles on the surface of the charging cable, resulting in efficient cooling. This is said to prevent overheating and breakdowns. Supercooled flow boiling is a phenomenon in which a cooling liquid turns into steam at a temperature lower than its boiling point, heat is transferred (cooled) efficiently, and the surface temperature is kept constant. The research team concluded that a 7-meter commercial charger cable would allow for 1440 kilowatts (1800 amps) of charging for an 800VDC (volts direct current) EV battery. This is more than twice the charging speed of the world’s fastest current 640-kilowatt (800-amp) fast chargers. The temperature of the cable surface was kept below 80 degrees. The research team explained that smaller battery capacity could result in shorter charging times. Professor Lee said, “We expect that this research will dramatically improve the convenience of EV use by establishing the technological foundation for drastically shortening EV charging times.” Reporter Kim Young-hee (Contact [email protected]) Registered: 2024-10-17 07:51 Modified: 2024-10-17 08:54 ※Related thread [Korea] “Rain of fire” from the ceiling… Horrific footage of EV fire [9/17] [Bird★].
>>1 It would be like a substation, requiring 800vx1800a=1.440kw of power receiving equipment lol Or maybe they’ll store it in a huge battery or capacitor and release it all at once.
>>1 I wonder if it’s steam cooling. The cooling water is made negative pressure and boiled at a low temperature to increase the cooling efficiency… how do you do that? It’s taboo to use water in electrical systems, but at 800v it would be easy to die.
They concluded that an 800VDC (volts direct current) EV battery would be capable of charging at 1440kW (1800 amps). This is more than twice the charging speed of the world’s fastest current 640-kilowatt (800-amp) fast chargers. < ；?Д?> Nika with electricity….
This method is being researched by Professor Mudwar of Purdue University and I think it will be realized by 2022 but the problem is the performance of the battery rather than the charging station.
Let’s say this will be enough to cool the area from the charger to the car. And who is going to cool the contacts themselves which have a huge contact resistance, and then from the contacts to the charging management BMS inside the car, and then to the battery beyond that, and how? Sorry for looking all smug, but these kinds of utility models where “everyone has thought of that for a long time” usually have some pitfalls that lead to the conclusion that “oh, this isn’t going to work after all.”
If it becomes commercially viable, the bar for EVs will certainly be lowered, but right now I think the more pressing issue is how to dispel the image of a moving cremation vehicle.
In most cases, EV advocates try to cover up the poor evaluation of “current” EVs with expectations for “future” EVs. EVs offer little first-mover advantage to manufacturers, and even later-comer manufacturers can compete. If you have high expectations for future EVs, then your only option is to not buy an EV today.
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