Put one can of the black beans in a food processor with the chipotle and adobo. Process until smooth and set aside.
Heat the oil in a medium pot over medium-high heat.
Add the onion and cook for about 3 minutes. Then add the red bell pepper, garlic and carrots and cook for about 3 more minutes.Reduce the heat to medium.
Add the cumin, chili powder and oregano and cook for 30 seconds.
Add all the beans, brown sugar and the tomato purée. Cook for 5 minutes.
Add the salt, pepper and water. Cook for 15 minutes more, stirring occasionally.