SOC estimation method for power battery of unmanned aerial vehicle in high-altitude flying environment

Abstract

The invention discloses an SOC estimation method for a power battery of an unmanned aerial vehicle in a high-altitude flying environment. The method comprises: simulating a high-altitude flight environment and establishing a first table and a second table that use temperatures, gas pressures, and discharge rates as item bars and actual total capacity and discharge capacity losses of a battery in acurrent state as data bars; carrying out charging and discharging under the nominal condition to obtain actual total capacity and discharge capacity losses of the battery under the nominal condition;calculating an SOC of an unmanned aerial vehicle during the flight process; and then calculating the SOC of the battery after flight ending. According to the invention, the involved parameters are reduced; the method is simple; and the accuracy is high.

Description

technical field [0001] The present invention relates to the field of power battery management systems for unmanned aerial vehicles in high-altitude flying environments, in particular to a SOC (State of Charge, state of charge) estimation method for unmanned aerial vehicle power batteries in high-altitude flying environments. Background technique [0002] The SOC state of charge, also known as the remaining capacity, represents the ratio of the remaining capacity of the battery after it has been used for a period of time or left unused for a long time to the capacity of the fully charged state, usually expressed as a percentage. SOC is related to the power battery charging and discharging system, operating temperature and battery health status, and reflects the current remaining power state of the power battery. The commonly used formula is as follows: Since the rated capacity of the battery is not constant, as the battery ages, there is a capacity loss during use, and the c...

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Problems solved by technology

However, in the calculation process of the above method, some parameters are difficult to obtain, the amount of data is large, and the accurate estimation of the battery SOC is an important parameter for the control of the hybrid propulsion system, so there are certain defects, and it cannot be applied to the power battery of the drone in the high-altitude environment. SOC estimation on

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