Method for estimating energy type lithium ion battery remaining capacity in wide temperature environment

The invention discloses a method for estimating the energy type lithium ion battery remaining capacity in a wide temperature environment, which relates to the field of energy type lithium ion battery remaining capacity estimation and is used for solving a problem that the existing method for estimating the battery remaining capacity does not take temperature influence on the battery remaining capacity into consideration. The method comprises steps of: 1, carrying out six-discharge capacity discharge test on a lithium ion battery under six temperature conditions; 2, selecting 1 discharge capacity (C) as a highest discharge current and 0.2C as a lowest discharge current, and obtaining Peukert coefficients K and n under six temperature conditions; 3, carrying out curve fitting on six points so as to obtain a fitting formula which utilizes T as an independent variable and k as a dependent variable; 4, carrying out curve fitting on six points so as to obtain a fitting formula which utilizes T as an independent variable and n as a dependent variable; 5, adopting an available capacity formula; and 6, bringing Cava, I and T into a battery remaining capacity formula so as to estimate the power type lithium ion battery remaining capacities in different temperature environments. The method is applied to the field of battery remaining capacity estimation.