An ignition coil contains two coils made of copper wire. Usually an ignition coil consists of two coils, namely the primary coil which receives the low voltage and the secondary coil which deals with the high voltage. The ignition coil was invented in 1876 by the Belgian Etienne Lenoir. Over the years, the ignition coil has evolved into the ignition coil we use today. A properly working ignition coil is necessary to start the engine.