About Tesla's charging station

A charging pile (bolt) is an indispensable accessory facility in the rapid development of new energy vehicles today, which can realize timing, metering, and charging amount, and can be used as a public power purchase terminal. At the same time, in order to improve the efficiency and practicality of public charging piles (plugs), the future will continue to add a pile (plugs) multi-charge, charging for electric bicycles and other functions. Its industrial serial bus (RS485, RS232, CAN bus) has the advantages of reliable data transmission and simple design, and the disadvantages are complex network layout, poor scalability, high construction cost, poor flexibility, and low communication capacity.

This article explores the voltage and power of Tesla's charging station. The voltage of the charging pile of Tesla has 380 volts and 220 volts, of which 380 volts is fast charge and 220 volts is slow charge. Its output voltage and current can be adjusted by itself, and the charging power can reach up to 150 kW. If it is a Tesla AC pile, it is a slow charge pile, 220V single-phase electricity can be used; If it is a fast filling pile, only 380V three-phase power input can be used.

As early as the third quarter of 2015, Tesla provided users with high-power home charger options, using 380V voltage, driving range of about 100km, reducing charging costs. In terms of charging costs, 220V charging piles use residential electricity prices, while 380V charging piles need to use industrial electricity prices. The 220V power of Tesla's home charging pile is about 7000 watts, and the 380V voltage power is about 20 kilowatts. The charging pile is divided into two categories: AC pile and DC pile. General AC pile power is 7KW, using 220V single power; Dc pile power 30, 60, 100, 150, 200KW and other power levels to choose from; The actual charging is based on the matching result between the battery parameters of the electric vehicle and the charging pile, and changes with the charging state.

Tesla charging AC charging, how to lift the maximum power limit?

Tesla uses 480V DC fast charging. So 85kW/480V=177A

According to the information provided by some informed people, "Tesla fast charge requires 30 minutes to be full of half of the electricity, according to the power calculation of Model 3, that is, an hour needs to charge 85 degrees of electricity, and the electricity needs to reach 85 KWH." However, Tesla's fast charge concept needs to break through the voltage limit of AC power supply (single-phase 220V, three-phase 380V), and the voltage transmitted to the Model S charging port through the water-cooled charging line is DC, and the voltage is raised to 480V, so 85kW/480V=177A

The corresponding Tesla ordinary home charger uses AC 220V, the charging current is 40A, and the corresponding charging power is 8.8kW. A full 85kWh battery pack takes about 10 hours.

Tesla charging time

1) Ordinary household circuit

The average American home circuit is 120 volts and the current is 12 amps. Connect the 110V plug with the charging cable, connect the plug to the 110V socket, and connect the Model S with the other end of the charging cable. The current then passes through the Model S's built-in charger to charge the battery under the car. It takes 46 hours and 17 minutes to fully charge.

2) Modify the cable connection

Tesla proposes to retrofit the garage circuit to 240V, 40A, and fully charge the Model S using a standard single charger in 8 minutes and 19 minutes. (Built-in dual chargers are not suitable for this situation and will not improve charging efficiency)

3) Efficient charging

Install high-power wall-mounted charging connectors in the garage or outdoors, with a voltage range of 20-250V, 60Hz, and a current regulation range of 40-100A. The Model S, which comes standard with a single charger, still takes 8 hours and 19 minutes to fully charge in these conditions. The optional built-in dual charger can be fully charged in just 4 hours and 09 minutes.

4) Public charging stations

The Model S can be charged at public charging stations using the J1772 connector. Some public charging stations are equipped with high amperage charging devices to facilitate fast charging of the Model S using dual built-in chargers.