Previously, vehicle WLAN communications have been used mainly for in-vehicle infotainment, but with the appearance of electric vehicles (EVs), WLAN technology is expected to play a key role in EV functions.
As the name suggests, electric vehicles use electricity as the energy source, meaning that recharging the built-in battery cannot be avoided. Although a gasoline vehicle can run out of fuel, recovering from loss of electrical power in an EV requires much more time and effort to fully recharge the battery compared to filling with gasoline, and the battery charge must always be high enough to prevent the risk of being unable to drive due to loss of battery power.
Electric vehicles are charged generally using a wired connection between a charging station and the vehicle. However, each time the EV is charged, a long cable must be pulled from the charging station and connected to the vehicle, which is quite hard work, especially in bad weather, such as rain and snow, but cannot be avoided depending on the remaining battery capacity. To make EV battery charging easier, wireless charging systems that do not require charging cables have been developed. WLAN is one of the technologies that make it up.