Method and system for calculating maximum available energy of lithium ion battery

The invention provides a working condition-energy consumption-temperature fused lithium ion battery maximum available energy calculation method and system, which aims at the actual available energy of a lithium ion battery, considers the influence of working condition, heating energy consumption and temperature on the available energy, and establishes a battery use condition prediction model based on traffic signal timing information. According to the whole vehicle power system configuration, simplified modeling is carried out on key components to establish a whole vehicle energy consumption prediction model, a temperature prediction model based on multi-physics field coupling model order reduction is established, output energy prediction under a given working condition can be output, the available energy estimation precision of the lithium ion battery can be improved, and the energy utilization rate of the lithium ion battery can be improved. And the target temperature calculation of the battery thermal mana