Charging for 5 minutes, can it run for two hours? Huawei's liquid-cooled overcharging is once again far ahead? !

If Huawei's Mate60 series is far ahead, then its fully liquid-cooled supercharger is a timely rain that went online during the National Day peak to irrigate every pure electric car that is about to die of thirst on the highway.

Liquid cooling overcharging, what’s the difference? If you have ever recharged power at an ordinary 120kW supercharger, you must have experienced the awkwardness of charging like lifting weights: the charging gun cannot be pulled out of the bayonet, the charging cable is heavy and long, and sometimes the cable is still It knows how to tie knots, but just taking the charging gun out of the chaos has already wasted all its strength and left a hand full of mud.

In the past, when you go to a gas station, you only need to shout 95 to fill up with the station staff and everything will be fine. Now you have to back the car into the garage, dock the gun, and scan the QR code to charge. It is like heaven and earth. In short, the traditional charging experience is mainly a thankless one. The essential reason is the heat dissipation problem caused by high-power electrical appliances, which makes the charging pile have to pile up more heat dissipation materials, which eventually turns into a perceptible weight for the user.

(Image source: Zhihu @charge and battery research) Compared with the traditional air-cooled "big force can produce miracles", the liquid-cooled supercharged heat dissipation solution has a different idea and directly creates a "source of running water". In traditional air-cooled heat dissipation charging piles, the cables are filled with a large amount of thermally conductive and insulating materials. The resistance heat generated during the charging process is conducted to the heat sink inside the charging pile, and then the heat is dissipated to the outside through the high-power fan behind the heat sink.

The relationship between liquid cooling and overcharging is to air cooling, just like the relationship between liquid cooling and air cooling in PC hosts.

Because liquids have strong thermal conductivity and high specific heat capacity, they are inherently ideal thermal conductive materials. In the liquid cooling plate, the liquid pipes are surrounded by a "U" shape like a winding mountain road to maximize the heat dissipation power. Under the action of the water pump, the heat-conducting liquid flows continuously, just like human arteries and veins. The inlet pipe of the water-cooling pile brings cold water, and the outlet pipe sends away hot water. The hot water is cooled in the remote radiator and re-injected, and so on. , it can dissipate heat perfectly.

As for why various high-power charging piles are now using liquid cooling, it is actually the same as PCs: a dreamy single fan and single heat pipe will definitely not be able to suppress i9, but liquid gold water cooling can make RTX4090Ti freeze. Liquid can take away more heat than the air medium, so the water-cooled heat dissipation system has a high heat dissipation limit and can withstand high-power heating of up to 600kW.

In summary, due to the improved thermal conductivity and the feature of external radiator, water-cooled supercharged piles not only have light and thin wires, but the size of the pile is also much smaller. Why has high-power overcharging become a must-have technology for everyone? There are only three factors that restrict the battery life of pure electric vehicles: 1) battery capacity; 2) energy replenishment speed; 3) energy consumption performance. If any of these three factors is improved, the battery life of pure electric vehicles can be extended. For example,   the Kirin battery of Jikrypton 001 ( Parameter | Inquiry ) uses a capacity of 140 degrees to work miracles, achieving a pure electric vehicle's 1,000km+ range.

Mercedes-Benz EQS, although it is really ugly, its energy consumption of 12 batteries per 100 kilometers is indeed outstanding. With the same battery capacity, EQS can run farther.

As for the energy replenishment speed, it cannot actually directly improve the endurance of pure electric vehicles, but can give pure electric vehicles a new lease of life through "life extension". So why is it still included among the factors that restrict the battery life of pure electric vehicles? Think about it, if there are more charging stations on the road than gas stations, and there are more charging guns than refueling guns, and it can even be faster to fully charge than to fill up with gas, then do pure electric vehicles still have battery life anxiety? It doesn’t exist at all. The current situation is that it is difficult for the industry to produce battery packs with higher density, just like NIO’s 150-degree semi-solid-state battery is still difficult to produce; the energy consumption performance is difficult to break through the physical limits of semiconductors, after all, we cannot create "water droplets". However, the charging power can be improved. When we use mobile phones, we can charge "five blessings and one safety" to a 240W fast charge that is comparable to that of a laptop. Wouldn't it be enough to let an electric car go on the same road again?

This is the essence of the current development of 800V architecture, not only for lower energy consumption, but also for a faster energy replenishment experience. In ancient times, it took five minutes to charge and two hours of talk time, but now there is "one kilometer per second". This is the horror of overcharging. Currently, Huawei's liquid-cooled supercharger can achieve a maximum output power of 600kW and a maximum current of 600A, which is equivalent to charging 0.16 kilowatt-hours of electricity in one second. Calculated based on the power consumption level of 16kWh/100km, that is indeed “one kilometer per second”.

It seems that the dream of "charging for 5 minutes and lasting for two hours" is really about to become a reality. Finally, in the catering industry, we pay attention to the "table turnover rate". The more times the same table is used, the more people will be full and the more merchants will make money. Electric vehicle charging also pays attention to the "pile turnover rate". The more times the same charging pile is used, the more cars will be fed and the more car owners will be able to happily hit the road. During the National Day holiday, many pure electric car owners were not only stuck on the highway, but also in the service area, waiting for the release of charging resources. If each car takes half an hour to charge before it can start again, it means that the next car owner will stare at the charging pile for half an hour. But if overcharging becomes more and more popular, charging in less than 10 minutes will allow the tram to travel to the next destination without any pressure, and electric car owners will no longer have to engage in a new era of tug-of-war to "grab the pile."