Demand for lithium-ion batteries is growing in North America, driven by decarbonization actions. This will result in rising manufacturing scrap and retired batteries as recycling feedstock. We use a dynamic material flow analysis to forecast lithium-ion battery recycling feedstock in North America until 2050. Existing and planned battery recycling infrastructure for battery pre-processing and refining has overcapacity until 2030, but will need to continue expanding to handle the increasing volume of recycling feedstock. Required recycling capacity expansion could range from 20% (in a 0% production scrap and long battery lifetime scenario) to 800% (in a 20% production scrap, short battery lifetime, all battery production in North America, and large battery size scenario) for pre-processing, and up to 500% for refining in 2035 (short lifetime and large batteries). Battery recycling capacity has a few years to expand and meet the increasing retired battery feedstock, though the quantity and timing of the feedstock are uncertain.