Method for estimating state of power based on electrochemical model of lithium-ion battery

A non-transitory computer readable storage medium storing a computer program, which, when executed by a processor, the processor is configured to:

• obtain an ambient temperature and an initial state of charge of a battery;
• obtain state information about the battery, and obtain a simulation result of the battery at each moment within a preset time period based on the state information about the battery and an electrochemical model of a lithium-ion battery;
• obtain a maximum feasible current value of the battery within the preset time period by iteratively optimizing a simulation process with the simulation result of the battery as constraints;
• perform simulation by taking the maximum feasible current value as an amplitude of an input constant current sequence of a battery port to obtain a curve of a port voltage of the battery within the preset time period, obtain maximum output power of the battery based on the curve of the port voltage of the battery and the amplitude of the constant current sequence, and take the maximum output power of the battery as a maximum available power value corresponding to the ambient temperature and the initial state of charge of the battery;
• and
• adjust the ambient temperature and the initial state of charge of the battery, and repeat the above steps to obtain the maximum available power values corresponding to different ambient temperatures and different initial states of charge of the battery to obtain the state of power of the lithium-ion battery.

An electronic device, comprising:

• a memory;
• and
• a processor storing a computer program, which, when executed by the processor, the processor is configured to:
• obtain an ambient temperature and an initial state of charge of a battery;
• obtain state information about the battery, and obtain a simulation result of the battery at each moment within a preset time period based on the state information about the battery and an electrochemical model of a lithium-ion battery;
• obtain a maximum feasible current value of the battery within the preset time period by iteratively optimizing a simulation process with the simulation result of the battery as constraints;
• perform simulation by taking the maximum feasible current value as an amplitude of an input constant current sequence of a battery port to obtain a curve of a port voltage of the battery within the preset time period, obtain maximum output power of the battery based on the curve of the port voltage of the battery and the amplitude of the constant current sequence, and take the maximum output power of the battery as a maximum available power value corresponding to the ambient temperature and the initial state of charge of the battery;
• and
• adjust the ambient temperature and the initial state of charge of the battery, and repeat the above steps to obtain the maximum available power values corresponding to different ambient temperatures and different initial states of charge of the battery to obtain the state of power of the lithium-ion battery.