Control method for lithium-ion battery formation and lithium-ion battery formation system

A control method for lithium-ion battery formation, the control method comprising:

• determining film formation quality of a target lithium-ion battery, wherein the target lithium-ion battery is a lithium-ion battery in a formation process;
• obtaining a plurality of formation data sets of the lithium-ion battery, wherein each formation data set comprises a plurality of data groups in a one-to-one correspondence with a plurality of formation time points during the formation process, and each data group comprises historical film formation quality, a solid electrolyte interface (SEI) film impedance and an interface charge transfer impedance of a corresponding formation time point;
• determining an optimal film formation quality corresponding to each formation time point from the plurality of the formation data sets according to constraint conditions, and obtaining an expected film formation quality corresponding to each formation time point;
• wherein the constraint conditions comprise:
• for each formation time point, the SEI film impedance corresponding to the historical film formation quality being less than a first threshold, and the interface charge transfer impedance corresponding to the historical film formation quality being less than a second threshold;
• and
• adjusting target parameters in a parameter adjustment order determined according to a deviation when the deviation between the film formation quality and the expected film formation quality does not satisfy a predetermined requirement, so that after the target parameters are adjusted, the deviation corresponding to the formation process meets the predetermined requirement;
• wherein the target parameters are to-be-adjusted formation process parameters determined according to the deviation, the parameter adjustment order is an adjustment order of the target parameters, and formation process parameters are process parameters affecting the film formation quality in the formation process.