ELECTRIC QUANTITY METERING SYSTEM OF BATTERY

摘要

An electric quantity metering system of a battery comprises a battery voltage collecting module (21) and a microprocessor module (22). An input end of the battery voltage collecting module (21) is connected to the battery to collect an end voltage of the battery. The microprocessor module (22) is connected to an output end of the battery voltage collecting module (21) to receive the end voltage of the battery and estimate a remaining electric quantity of the battery. The microprocessor module (22) estimates an open-circuit voltage of the battery according to the end voltage of the battery and a built-in battery model, and then deduces the remaining electric quantity of the battery according to an SOC-OCV relationship of a typical lithium-ion battery. The electric quantity metering system of the battery can keep the precision of the electric quantity metering of the battery, and the electric quantity metering system can be disposed inside or outside the battery.