Electricity metering device for power battery

Abstract

The invention relates to an electricity metering device for a power battery. The electricity metering device for the power battery comprises the power battery, a current sampling module, a voltage sampling module, an electricity metering module, a processing module and an external interface, wherein the power battery is used for providing power for a drive motor and is charged by a direct-current charger; the current sampling module is used for acquiring a charge-discharge current of the power battery; the voltage sampling module is used for acquiring a charge-discharge voltage of the power battery; the electricity metering module is used for converting output signals of the voltage sampling module and the current sampling module and outputting the converted output signals to the processing module; the processing module is used for reading data of the electricity metering module and processing the charging and discharging state data information of the power battery; and the external interface is used for transmitting the data. By the electricity metering device for the power battery, the problems of small measuring range and low precision of a general metering device are solved; and the accuracy of expense settlement is improved.

Description

technical field [0001] The invention relates to the technical field of measurement, and more specifically relates to a power battery metering device, which is suitable for measuring the power battery power of the legal billing function. Background technique [0002] As a clean and environmentally friendly green vehicle, electric vehicles have attracted great attention from governments and automobile manufacturers around the world. Electric vehicles are powered by electricity, can achieve "zero emission" and have low noise, which is an important means to solve energy and environmental problems. The charger provides energy supply for the operation of the electric vehicle, but there is no legal metering device placed inside the electric vehicle to measure and display the single and cumulative charge and discharge of the battery pack of the electric vehicle. It mainly uses mechanical watt-hour meters, which not only can only measure electric energy in one direction, but also ha...

AI Technical Summary

Problems solved by technology

The charger provides energy supply for the operation of the electric vehicle, but there is no legal metering device placed inside the electric vehicle to measure and display the single and cumulative charge and discharge of the battery pack of the electric vehicle. It mainly uses mechanical watt-hour meters, which not only can only measure electric energy in one direction, but also have defects such as large power consumption, insufficient measurement accuracy, unsatisfactory error curves, regular calibration is required, and severe vibration during driving affects the measurement of mechanical components, etc. , unable to meet the electric energy metering requirements of electric vehicles

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