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Current measurement device

A current measurement device and current value technology, applied in the field of measurement, can solve problems such as unsatisfactory measurement accuracy, gain error temperature drift, etc., and achieve the effect of improving accuracy and eliminating zero point error

Active Publication Date: 2016-03-09
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the influence of zero point error, gain error and temperature drift error, the current measurement device or method is not ideal in measurement accuracy.

Method used

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Embodiment Construction

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] In the descr...

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Abstract

The invention discloses a current measurement device, and the device comprises a current sensor, a temperature sensor, a storage unit, and a processor. The current sensor is connected with a measured part, and is used for measuring the current of a measured part and obtaining the current value. The temperature sensor is used for measuring the temperature of the device and obtaining the temperature value. The storage unit stores a sensor compensation parameter and a temperature compensation parameter. The processor is used for calibrating the current value according to a calibration formula: Y=K[T](kX-b)-B[T], wherein X is the current measurement value, Y is the calibrated current value, k and b are the sensor compensation parameters and are constants, T is a constant, K[] and B[] are temperature compensation parameters, are arrays and change along with T, and K[T] and B[T] represent two values of K[] and B[] corresponding to T. According to the embodiment of the invention, the device eliminates a zero point error, a gain error, and a temperature drift error, thereby improving the measurement accuracy.

Description

technical field [0001] The invention relates to measurement technology, in particular to a current measurement device. Background technique [0002] Current measurement devices are required in existing application environments such as electric vehicles, hybrid vehicles, and battery energy storage systems. The existing current measurement device uses a sensor to measure the current, and converts the measured current analog signal into a voltage, current or frequency analog signal with a smaller amplitude, and transmits the converted analog signal to the corresponding controller through the signal line. First pass through the signal processing circuit on the controller, and the analog-to-digital converter on the controller converts the analog signal into a digital signal, and finally transmits the digital signal to the main chip on the controller (such as a microcontroller (microcontroller) or A digital signal processor (digital signal processor) performs calculation and proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/32
Inventor 李鑫邓林旺王超
Owner BYD CO LTD
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