Lithium battery SOC and SOH joint estimation method and system based on error correction

The invention discloses a lithium battery SOC and SOH joint estimation method and system based on error correction, and the method comprises the steps: firstly carrying out the missing value filling of the charging and discharging data of a lithium battery through a KD tree, and building a first data set; then establishing a lithium battery SOC estimation model, and performing SOC estimation to obtain an SOC estimation value; performing error correction on the SOC estimation value by using an OSELM model to obtain a final SOC estimation value; and forming a second data set by the final SOC estimation value and lithium battery charging and discharging data, establishing a lithium battery SOH estimation model, optimizing model hyper-parameters by adopting an improved arithmetic optimization algorithm, and performing SOH estimation to obtain a final SOH estimation value. According to the method, the thought of error correction is combined, the estimation result of the state of charge of the lithium battery is mo