Joule is a unit of energy used to describe the amount of energy transferred or used. One Joule is equivalent to the energy used when one watt of power is expended for one second. In EVs, Joules help quantify the energy stored in the battery and consumed by the vehicle, impacting range, performance, and efficiency. This term is relevant as energy capacity in batteries is often measured in watt-hours (Wh), which is directly related to Joules (1 Wh = 3600 Joules).
