The BYD Seal was announced in China in May 2022, with deliveries in August 2022. Its design was previewed as the BYD Ocean-X Concept in September 2021. As part of the "Ocean Series" line of products, the Seal adopts many ocean-inspired design features. The exterior design features low hood, pop-out door handles, and long taillamp unit. The dashboard air vents of the Seal have a wavy pattern.

The battery of the Seal is structural, giving the unibody chassis higher torsional rigidity (40,500 Nm/deg compared with an industry average of around 25,000) and a lower floor compared to other electric cars.The Seal has a drag coefficient of just 0.219 Cd. BYD claims a 50:50 weight distribution between the front and the rear for the Performance AWD variant.

The Seal is available with a rotatable 15.6-inch infotainment screen, 10.25-inch digital instrument panel, 12-speaker Dynaudio audio system, panoramic sunroof, quilted vegan leather upholstery, dual wireless smartphone chargers and heated and ventilated front seats. The Seal also has a 53-litre front trunk (frunk). Some models are equipped with Intelligent Torque Adaption Control (iTAC) system (a torque vectoring system) and adaptive dampers.