Praise be to Allah.
Your saying to your wife, “Get in the car, I will divorce you” is not regarded as a divorce, rather it is a promise of divorce, so divorce has not taken place.
You have to deal with the problem of being too angry, and beware of uttering the word of divorce in all situations, even if your wife asks for it. See the answer to question no. 658.
And Allaah knows best.
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