A SOC estimation method for UAV power battery in high-altitude flying environment

Abstract

The invention discloses a method for estimating the SOC of a power battery of an unmanned aerial vehicle in a high-altitude flight environment, which includes: first simulating the high-altitude flight environment to establish the item column of temperature, air pressure, and discharge rate, the actual total capacity of the battery in the current state, and the loss of discharge capacity It is the first table and the second table in the data column, and then the actual total capacity and discharge capacity loss of the battery under nominal conditions are obtained by charging and discharging under nominal conditions, and the SOC of the battery during the flight of the drone is calculated. Finally calculate the SOC of the battery after the flight. The invention involves few parameters, simple method and high accuracy.

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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