What is the significance of liquid-cooled supercharging?

The significance of liquid-cooled supercharging is that it can obtain greater charging power and shorten the originally long charging time under the same charging current.

Liquid Cooling EV superchargers

For example, if the charging current is calculated based on about 200A, the charging power of the 400V platform is 80kW, and the charging power of the 700V is 140kW.

Theoretically, in the charging range of 30%-80%, the charging time of the 700V platform can be saved by about 40%.

Note that I am talking about 700V voltage. At present, the calibration method in the industry is basically that voltages above 650V can be called 800V, but there are not many vehicles that can achieve a charging voltage of 800V. The charging voltage of most 800V vehicles hovers around 700V.

In addition, I said that in theory, it can shorten the time by 40%.

Why?

Because in actual charging, the maximum charging speed is not only determined by the vehicle end but also by the charging pile. Just like mobile phone charging, a mobile phone that supports 120W fast charging can only be charged at 5W with a 5W charger.

The action of charging depends on the shortest board.

The first generation of charging piles on the market has a power of 60kW air cooling, which has been eliminated. Only some community-supported fixed parking lots are still in use. Most fully open commercial charging piles have been upgraded to 120kW water-cooled charging piles.

Taking the Wenzhou market as an example, a rough estimate in a certain commercial charging system shows that the proportion of 240kW charging piles is only about 10%.

One of the core reasons why there are fewer 240kW charging piles is that from the perspective of commercial operation, its procurement cost is more than double that of 120kW. The supply of 120kW charging piles on the market is huge, and it has the advantages of low cost and maturity.

The laying of 240kW charging piles is not only a single cost issue but also has supporting transformers, grid pressure, and other issues. The comprehensive laying of 240kW charging piles will bring direct pressure to the local grid.

The charging speed of 120kW is the speed that 400V vehicles can fully charge at present.

Taking the Yuan PLUS, which has a relatively large sales volume, as an example, it can consume a charging power of 100kW, while Tesla, which has a huge sales volume, can easily consume a charging power of more than 200kW, whether it is 3 or Y.

Build suitable charging stations

So how much power can 800V products consume?

Taking Zhiji LS6 as an example, it can consume more than 350kW, but it is powerless when facing a 120kW charging pile. The supply voltage and supply current at the charging end limits the charging power.

In addition, not all 800V vehicles can be fully charged at a 120kW charging pile. After all, the design standards of 120KW charging piles are different.

Therefore, the significance of 800V vehicles has come out, which is to ensure that the advantage of higher charging voltage can be used to make up for the relatively small maximum charging current on each charging pile and to obtain the maximum charging power as much as possible.

Although there are still relatively few 240kW charging piles at present, the number of 240kW charging piles will gradually increase after 2025, which will inevitably shorten the charging time. Therefore, another meaning of 800V is to ensure that the elimination of vehicles will be slower in the future.

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