Liquid-cooled energy storage charging pile type

What is a trickle charge?

The charge power of household charging stations using the alternating current (AC) is commonly within 10 kW, referred to as a trickle charge. A system that charges vehicles with direct current (DC) of 50–60 kW is called a fast-charging system, and those charging vehicles with the power higher than 150 kW are termed superfast charging systems.

Which coolant should be used for high-power fast charging & Superfast charging?

However, for high-power fast charging and superfast charging, active liquid cooling that combines pumps and coolants (such as water and dimethyl silicone oil) needs to be used . In addition, the phase-change heat transfer technology of coolants also should be introduced as the charging power increases in the future [12, 13].

What is the charge voltage platform of electric vehicles?

At present, the charge voltage platform of electric vehicles is generally about 400 V, as shown in Fig. 1. The charge power of household charging stations using the alternating current (AC) is commonly within 10 kW, referred to as a trickle charge.

How do you insulate a high-current charging cable?

Given that traditional natural convection or air-cooling techniques cannot meet the heat dissipation requirements of high-current charging cables, the method of directly immersing the cable core in insulating heat-conductive oil for active liquid cooling becomes the inevitable choice.

How does liquid cooling affect 230 kV cross-linked polyethylene cables?

For example, Brakelmann and Anders compared influences of the two liquid cooling methods on the circuit capacity of 230-kV cross-linked polyethylene cables using a numerical model. They found that when the temperature of conductors is in the range of 50–85 °C, the direct cooling shows a better effect than indirect cooling.

What is Superfast charging technology based on DC?

According to the existing technological development trend, the superfast charging technology based on DC is expected to significantly shorten the charging time of vehicles and therefore relieves the anxiety around endurance and remaining mileage [4, 9, 10].