Smart Battery Sensor Using Hall Sensors

Abstract

The present invention provides an intelligent storage battery sensor utilizing a Hall sensor. The intelligent storage battery sensor utilizing a Hall sensor according to the present invention is characterized in that the Hall sensor outputs a magnetic field that varies according to the magnitude of the current in an analog manner, and is not related to the measured magnetic field. In direct contact with the body, there is no loss of durability and performance degradation due to wear, especially when using such Hall sensors with small output characteristics with temperature changes to measure current indirectly. The present invention uses a current-controlled oscillator (CCO) to detect current, voltage and temperature; and because it does not use a shunt resistor, its structure is simpler than using an analog-to-digital converter; without using a digital filter, it can also reduce the area.

Description

technical field [0001] The invention develops battery sensor technology using a Hall sensor, and in particular relates to a device for detecting battery current, voltage and temperature. Background technique [0002] Generally speaking, the intelligent battery sensing system extracts the chemical characteristics of the battery by measuring electric quantities such as current, voltage, and temperature, and calculates the maximum energy that the battery can supply while the vehicle is running by predicting the charging capacity and life of the battery, so as to limit the unsatisfactory energy during deceleration. The energy consumed is necessary to protect the battery from overcharging, and at the same time optimize the range of use of the battery. For this reason, it is necessary to induce and extract chemical characteristics through electrical data, requiring more accurate measurement data. [0003] figure 1 A common battery sensor system using a shunt resistor is shown, th...

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Problems solved by technology

[0004] Although the shunt resistor has the advantage of low price, because the current flows directly on the shunt resistor, the loss is caused by the voltage drop, and the current measurement value may be wrong due to the resistance change caused by temperature.

[0005] At the same time, the use of more than 16-bit analog-to-digital converter (ADC) for signal processing will only increase the complexity of the design, and will also have the disadvantage of increasing the chip area.

[0006] That is, the traditional battery sensor system has the disadvantages of voltage drop loss and high sensitivity to temperature due to the use of shunt resistors. In order to correct this defect, additional circuits are required and analog-to-digital converter bits are required for high-precision measurement, resulting in complex design. And the defect that the chip area increases

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