Charging parameter adjustment method, controller, terminal device, and storage medium

A method for regulating a charging parameter, which is applied to a controller, wherein the controller is in communicative connection with a charging assembly, the charging assembly comprises a battery and a charger configured to charge the battery, the charger is configured with a plurality of output levels, and

• the method comprises:
• acquiring a present battery internal resistance of the battery and an inter-level voltage difference between two adjacent output levels;
• acquiring a parameter fluctuation amplitude of an electrical signal of the charging assembly under the inter-level voltage difference, according to the battery internal resistance and the inter-level voltage difference;
• acquiring a present electrical signal parameter of the charging assembly and a threshold parameter corresponding to the electrical signal parameter;
• and
• acquiring a target output level of the charger according to the electrical signal parameter, the threshold parameter and the parameter fluctuation amplitude, and regulating a present output level of the charger to the target output level.