Charging sequence control of a power electronics system

A method for charging sequence control of a power electronics system, in which a charging power is provided by the power electronics system, the method comprising:

• controlling a charging unit, which is operated by a user and which transfers the charging power to a battery, using a charging control system,
• carrying out a communication exchange at least between a control device of the power electronics system and the charging control system, in which a plurality of charging process states are predetermined, in which sequences between the charging process states are stored in a program sequence plan, and in which the program sequence plan is used for charging sequence control of the power electronics system,
• proceeding from a switch-on process, predetermining the charging process states “Initialization,” “Ready to charge,” “Initialization of charging interface,” “Insulation measurement,” “Precharging,” “Charging,” “End charging process,” “Charging process terminated,” and for the event of a fault the charging process states “Not ready to charge” and “Fault in charging process,”
• wherein the respective charging process state is supplied with at least one respective task and/or is formed by at least one respective piece of state information coupled to the respective charging process state,
• forming the communication exchange with the charging control system by at least one of the pieces of state information,
• wherein, if no fault arises, a change is made to a respective next charging process state as soon as a respective task is ended and/or a change is triggered by communication exchange with the charging control system, and
• wherein, if a fault arises, a change is made to the charging process states “Fault in the charging process” or “Not ready to charge” and a change is made to the charging process state “Ready to charge” after the fault has been eliminated.