Is energy density important in battery performance indicators?

Energy density, as the name implies, is the energy that a battery can hold per unit weight. Energy density is usually an important indicator of battery performance, but in my analysis system, the impact of energy density on battery performance is not very important. There are two reasons: 1. Energy density must be combined with other properties. For example, the energy density of lithium iron phosphate batteries is not high. However, due to its safety, stability, and high temperature resistance, the composition of lithium iron phosphate as a battery is very simple, and there is no need to protect auxiliary equipment too much. Tesla's ternary battery has a high battery density, but it is not safe enough to withstand high temperatures, so it must be combined with a complex battery protection device, which adds to the weight of the car. According to the report, after a series of burning accidents, Tesla is preparing to thicken its battery protection equipment to weaken the power density advantages of the ternary battery. 2. The weight has little effect on the vehicle, especially for the mainstream trend of electric vehicles in the future, hybrid and small-scale pure electric vehicles. We can imagine a battery with an energy density of 130 kWh/kg and a battery with an energy density of 200 kWh/kg. Even at a maximum of 80 degrees, the weight difference between the two batteries is less than 200 kg. This has little impact on vehicles of nearly 2 tons. Therefore, although the greater the energy density of the battery, the better, but it is not necessary to pursue the maximum. In particular, it is generally believed that the higher the energy density, the more unstable. The energy density is not important, as long as it is sufficient. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.