I asked GPT-4 to calculate the energy density required for a Ford F-150 Lightning to weigh the same as its gas counterpart. Seems about right to me. > The Ford

I asked GPT-4 to calculate the energy density required for a Ford F-150 Lightning to weigh the same as its gas counterpart. Seems about right to me. > The Ford F-150 gas version has a gross weight of 6,470 lbs (2,934 kg)【14†source】, while the Ford F-150 Lightning EV has a gross weight of 8,250 lbs (3,742 kg)【25†source】. This means the EV version is 1,780 lbs (807 kg) heavier than the gas version. To calculate the required pack density and cell density for the EV to weigh the same as a combustion vehicle, we need to know the weight of the battery pack in the EV. Unfortunately, that information is not directly available. However, we can make some educated estimates based on the battery's energy capacity and typical energy density values for EV batteries. The battery capacity of the Ford F-150 Lightning EV is 98 kWh【21†source】. As of 2021, the energy density of commercial lithium-ion batteries (the type typically used in EVs) is approximately 250 Wh/kg. Assuming this value, the weight of the battery in the EV would be approximately: 98,000 Wh / 250 Wh/kg = 392 kg However, this estimate is for the cells alone and does not account for the additional weight of the battery pack structure, cooling systems, and other components, which can add significant weight. For example, for the Tesla Model S, the battery pack weight is about 1.4 times the cell weight. If we assume a similar ratio for the Ford F-150 Lightning, the total battery pack weight would be approximately: 392 kg * 1.4 = 549 kg Given this estimate, the battery pack represents a significant portion of the additional weight in the Ford F-150 Lightning EV compared to the gas version. To make the EV weigh the same as the gas version, the battery pack would need to weigh 807 kg - 549 kg = 258 kg less. This could be achieved by improving the energy density of the battery cells, reducing the weight of the battery pack structure and other components, or some combination of the two. If we assume that the weight of the battery pack structure and other components cannot be significantly reduced, then the required improvement in cell energy density would be: Current cell weight: 392 kg Required cell weight: 392 kg - 258 kg = 134 kg Required cell energy density: 98,000 Wh / 134 kg = 731 Wh/kg This would be nearly a three-fold increase over the assumed current energy density of 250 Wh/kg. Please note that these are rough estimates and the actual values may vary based on the specific design and construction of the vehicle and battery pack. Additionally, increasing the energy density of battery cells is a major area of research and development in the field of battery technology, and significant improvements may be possible in the future.