The core difference between battery capacity and energy

① Definition and unit

Capacity: measures the ability of a battery to store charge, in Ah or mAh. For example, a 100Ah battery can discharge for 10 hours at a current of 10A.

Energy: represents the total electrical energy released by the battery, in Wh or kWh. The calculation formula is Wh = V × Ah. For example, the energy of a 3.2V, 100Ah battery is 320Wh.

② Differences in application scenarios

Capacity: directly affects the endurance. The larger the capacity, the longer the endurance.

Energy: determines the total endurance of the vehicle. The higher the energy density, the longer the endurance at the same volume.

③ The significance in actual car purchase

Capacity: pay attention to the endurance, and need to combine the battery capacity and energy density for comprehensive judgment.

Energy: pay attention to the energy density of the battery system. High energy density can reduce vehicle weight and improve energy efficiency.

When purchasing a EV, you need to make a comprehensive judgment based on the balance of capacity and energy, battery type adaptability, fast charging and low temperature scene requirements