Place the rinsed split peas, diced ham, sliced carrots, diced onion, and minced garlic into the slow cooker.
Pour the chicken broth over the ingredients. Add the dried thyme, bay leaves, salt, and black pepper.
Stir everything gently to combine, then cover the slow cooker.
Cook on low for 7 to 8 hours or on high for 4 to 5 hours until the peas have softened and the soup has thickened.
Remove the bay leaves, stir the soup once more, and serve.