An electric car is a powerful consumer of electricity. In a private household it is most likely the most powerful. But since the power allocated to the household (office, garage or other object) is always fixed. There is a problem that need solution; 22kw home charger.
Generally, people do not find a reliable source to get a professional home charger for evs.
And now let’s imagine that there is a device on the network that monitors the total load on the network. And as soon as it drops, the entire free stock sends to charge your electric car or even two.
This device knows how many amperes there is an allowable maximum for your network. And if your household “roams”, it will lower the charging current. The machine does not work. Such a device exists and it is called a dynamic load balancer.
Private household scenario in detail
The on-board 22kw home charger system of the Nissan Leaf electric vehicle can consume alternating current of 3.3 kW or 6.6 kW at a voltage of 220 volts. These are currents from 15 to 30 amperes, respectively. Tesla and other powerful electric vehicles – and even more practice this.
And in most electrical panels, the nominal value of the main machine is more than 32 A – it’s a rarity. What to do? After all, along with charging, you turn on a couple more consumers in the house. You can get the machine shutdown.
22kw home charger allocates a separate line; limit the car’s charging line with your automatic machine. And it limits the charging power to the station settings so that the total consumption does not exceed the load allowed for your network.
Suppose you have a 32 a main machine at the entrance in your house, one phase. All household consumers – on a 16 A machine, for an electric car you reserve one line with a 16 A machine. And set up the charging station accordingly.
Even if you put together the network in a different way, you are guaranteed a headache. You need to observe household electrical appliances all the time. And you instruct loved ones not to turn on “everything at the same time”, or to be nervous about the charging speed.
At the same time, everyone sleeps at night, home consumption reduces. It’s time to charge using 22kw home charger, but that’s bad luck. The station tunes to a fixed charging power, and it doesn’t care whether you are heating the kettle or sleeping.
But what if you have a powerful electric car and traveling work, you ride a lot, come home “discharged to zero”? But what if you have two electric vehicles – wait for one to charge, turn on the second, or charge both at the same time through a two-channel station with a meager current?
Dynamic balancing of the charging station for electric vehicles
A device measures the total current in the network and controls the charging process. It happens by assigning maximum charging currents to charging stations. The 22kw home charger calculates the currents in each phase when the total current of all consumers exceeds the threshold of the permissible value.
The balancer gives a command to the charging station to reduce consumption by an amount equal to the excess of the total consumption over the permissible value.
In the case of the opposite situation, when the total load decreases and the permissible value exceeds over the current total current of all consumers. It gives a command to increase the charging current by the value of this “gap”. Balancer pluses:
22kw home charger protects the network from overload and turning off the main machine at peak load.
At low network load by other consumers, accelerates the charging of the electric vehicle, increasing the charging current.
It allows you to charge an electric vehicle with the available power without allocating a separate line on which there are no other consumers. Moreover, it allows you to comfortably charge a car on lines with low total power (especially important in old and remote settlements), instantly using the released power.
Furthermore, 22kw home charger charges several electric vehicles at the same time, distributing the available current between them according to the configured scenario. Balancing scenario is a way of distributing the available power among the charging stations. Common scenarios for balancing-distribution of available power between charging stations, as an example:
Priority for some VIPs in% (suppose that in the case of distribution of the falling “at all”, some stations give more% of the available power than others than others;
Guaranteed power for VIP, the rest – equally the remaining;
“Queue” (allocated power is guaranteed to all charging, the one who lacks it waits for someone to disconnect).
Sometimes it is necessary to solve the problem of distributing not dynamically changing available power, but fixed one. For example, you have a service parking for 5 electric vehicles, 5 charging stations of 22 kW each, the available power is 50 kW, people come and go.
The likelihood that everyone gets charging at the same time and will try to get their 22 kW is small. Not all cars have such powerful 3-phase on-board charging. Nevertheless, there is a possibility of overloading the network, and it would be nice to charge everyone.
Fixed settings for each station (divide the total power equally among all, or something else). The most ineffective way – some will not be enough, and some will not need so much, and the free undistributed power will be almost constant;
Installation of 22kw home charger that will distribute the available power (measurement of currents is not important. The available currents only enter into the device memory) according to a given scenario between all stations – convenient and efficient.