Spray a grill rack with the cooking spray. Preheat the grill to medium-high heat, 350 degrees F to 400 degrees F.
Grill the corn until tender, about 5 minutes per side. Grill the bell and poblano peppers until blackened slightly and tender, 3 to 4 minutes per side. Set aside to cool. Cut the kernels from the corn cobs and chop the peppers.
In a large bowl, place the beans and cilantro. In a separate bowl, whisk together the lime juice, chipotle chile powder, cumin and olive oil. Stir in the corn kernels and chopped peppers, tossing to coat with the dressing. Cover and chill until ready to serve.