Abstract: The invention provides a method and a system for early warning of dendrite formation in a lithium battery. The method includes acquiring real-time operating condition information and electrochemical parameters of the lithium battery; performing a computational simulation based on the real-time operating condition information and the electrochemical parameters through an electrochemical model, and obtaining by analysis a deposition result of the lithium battery; and using the deposition result obtained through electrochemical model simulation, providing early warning for the dendrite formation in the lithium battery. The invention avoids the growth of dendrites of the lithium battery by providing early warning and simulation for dendrite formation, thereby protecting the safety of the lithium battery system.

Abstract: The invention provides a method and a system for early warning of dendrite growth in a lithium battery. The method includes simulating the lithium battery in real time through an electrochemical model to judge whether the lithium battery generates lithium dendrites; simulating a growth trend of the lithium dendrites when the lithium battery is determined to generate the lithium dendrites; and judging and providing early warning of the dendrite growth in the lithium battery based on the growth trend of the lithium dendrites obtained through simulation. The invention prevents the growth of dendrites of the lithium battery by carrying out early warning and simulation for dendrite growth, thereby protecting the safety of the lithium battery system.

Abstract: A method for calculating a terminal voltage of a lithium battery based on an electrochemical model, an apparatus, and a medium are provided. The method includes: constructing the electrochemical model of the lithium battery, and dividing the lithium-ion battery into three domains comprising an anode domain, a separator domain, and a cathode domain; numerically simulating the electrochemical model in the three domains respectively using the Chebyshev spectral method, and respectively obtaining distribution data of a liquid-phase potential, overpotential, and open-circuit voltage of the anode and the cathode; obtaining solid-phase potential distribution data of the anode and the cathode, based on discrete data of the liquid-phase potential, overpotential, and open-circuit voltage of the anode and the cathode; and obtaining the terminal voltage of the lithium battery based on the solid-phase potential distribution data of the anode and cathode.

Abstract: The invention provides a method and system for decoupling electric field of electrochemical model based on a parallel targeting method. The method includes selecting a negative or positive electrode region as a calculation region; selecting a solid or liquid phase current as an observed quantity, and a solid and liquid phase potential as a costate variable; inserting nodes between two endpoints of the calculation region, and determining a target value of the observed quantity of each node; constructing N calculation units; respectively performing a target shooting on the N calculation units; and determining whether a distance between the target shooting value of the observed quantity of the end point of each calculation unit and the target value of the observed quantity of the node corresponding to the end point of the calculation unit is within a preset range.