Battery real-time electric quantity estimation method and instrument device of electric forklift

Abstract

The invention discloses a method for estimating the real-time electric quantity of a battery and an instrument device of an electric forklift, and relates to the field of electric energy storage systems, and the main points of the technical scheme are that the method comprises the steps of generating an initial voltage threshold array, obtaining real-time voltage, comparing and judging the current electric quantity stage, and judging whether to jump to the next stage or not based on the continuous voltage trend. The voltage threshold array is segmented according to a high-voltage area, a stable-voltage area and a low-voltage area, and fine judgment of electric quantity changes is achieved in combination with a dynamic jump control mechanism. The method does not depend on a current sensor, carries out estimation completely based on a voltage signal, has the advantages of low hardware cost, low energy consumption, small error and the like, and is particularly suitable for a lead-acid battery without a BMS (Battery Management System) and cost-sensitive industrial equipment, such as electric forklifts and warehousing and carrying equipment.

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