Place beans in slow cooker. Top with broth, sweet potatoes, onion, garlic, tomatoes, chilies, chipotle peppers, and adobe sauce.
In a small bowl, mix together spices. Add to black bean mixture. Give all the ingredients a quick stir.
Set your slow cooker to 6 hours on low. At the end of 6 hours, add in lime juice and chopped cilantro, and salt to taste. Please note that all slow cookers are different. It may need additional time to soften the beans, or change the setting to high. Mine cooks perfectly on low for 6 hours.
Blend half of the soup mixture with an immersion blender (or regular blender). This step is not necessary, but gives the soup a partly smooth texture.
Serve hot with your favorite toppings (avocado, green onion, tomatoes, or more cilantro).
Notes
Dried black beans do require soaking. I will sometimes soak overnight. For this recipe I forgot to soak, and it turned out great giving it a more "earthy" taste. It's up to you!