Hall signal measuring device and method with automatically adjustable detection range

Abstract

The invention provides a Hall signal measuring device with an automatically adjustable detection range. The Hall signal measuring device comprises a signal conversion module and a controller unit, wherein the signal conversion module is used for adjusting and outputting a signal measured by a Hall sensor, and the controller unit is used for determining the current value of the Hall sensor by adjusting the reference voltage and gain changes of the signal conversion module; the signal conversion module comprises a zero adjustment circuit and an amplitude amplification circuit which are connected, wherein the controller unit controls the reference voltage in the zero adjustment circuit to adjust the zero bias voltage of the output signal of the Hall sensor, the controller unit controls the gain coefficient of the amplitude amplification circuit to adjust the magnitude of the output signal of the Hall sensor; and the Hall sensor is a voltage output type Hall current sensor.

Description

technical field [0001] The invention relates to a current detection technology of a battery energy storage system, in particular to a Hall signal measuring device and method with automatic adjustment of the detection range. Background technique [0002] With the increasing use of new energy vehicles, the battery energy storage system is its main power source, how to more accurately monitor the changes of various indicators in the battery working process has become the main direction of the development of new energy technology; however, battery energy storage Many key indicators in the system, such as the state of charge parameter SOC, the maximum output power SOP, and the battery life SOH, all use current measurement as their operational input. Therefore, it is of great significance to improve the measurement accuracy of the working current of the battery energy storage system. [0003] Hall elements are usually used as front-end sensors for current measurement in battery en...

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to implement, due to the nonlinear characteristics of the output signal of the Hall sensor and the relatively small quantization depth of the ADC module of the controller, the detection resolution of the existing measurement device is very small, the accuracy is very low, and it is difficult to Susceptible to external electromagnetic interference

Images