EV batteries and charging is the set of hardware and software that stores energy in an electric vehicle and refills it. Three ways of refilling are common in India. A scooter is charged overnight at home. A car is fast-charged at a highway stop. A delivery rider swaps a flat battery for a full one at a station, in a minute or two.
Say a food-delivery rider in Jaipur rides an electric scooter. The scooter's battery is a battery pack, made of many battery cells and a board that watches them. When the charge runs low, the rider opens the charging app, which shows a free charger nearby. The charger fills the battery. A cloud service, EV charging management software, watches thousands of such chargers, starts each charge and sets the price. Or the rider goes to a swapping station and takes a full battery instead.
Each way suits a different user. Overnight charging at home is cheapest, but it needs a parking place with a socket, which many people who live in flats do not have. Highway fast charging suits a car owner on a long trip. Swapping suits a rider who earns by the trip and cannot wait for hours. Who owns the battery also differs. In the first two cases the buyer owns it. In swapping, the station company often owns it and the rider pays per swap.
Two ideas explain the difference between slow and fast charging. A slow charger supplies alternating current, the mains power, and takes hours. A fast charger supplies direct current straight to the battery. These are explained in AC and DC. Chargers from different makers exchange messages with the network software in a common standard called OCPP. The way cells are grouped is explained in battery cells, modules and packs.
The scene also touches the power grid. Many vehicles charging at the same hour can strain it. So the network can decide when each vehicle charges, which is described in grid balancing.