What is the starting current of a car in amperes?
1 Answers
Generally, the starting current of a sedan ranges between 100 to 300 amperes. The reasons for the high starting current and an introduction are as follows: Reasons for high starting current: The greater the load on the starting motor, the higher the output current from the battery. The load on the starting motor comes from the compression degree of the intake air by the pistons in the cylinders during engine operation. The compression ratio of gasoline engines usually does not exceed 11, while that of diesel engines can reach over 20. Therefore, diesel engines require a higher current during startup. Introduction to starting current: The starting current (CCA) index refers to the minimum current obtainable under specific conditions at -17.8°C and -28.9°C. This index links the starting capability of the battery with important variables such as engine displacement, compression ratio, temperature, starting time, the technical condition of the engine and electrical system, and the minimum operating voltage for starting and ignition. It refers to the minimum current that a fully charged battery can supply within 30 seconds when its terminal voltage drops to 7.2V (for a 12V battery). The cold cranking amperage rating provides the total current value, such as 300CCA, 400CCA, etc.
