Current sampling device based on diverter

Abstract

The invention provides a current sampling device based on a diverter; the current sampling device comprises a diversion module and a sampling module; the sampling module is connected with the input end of tested current, and associated with the diversion module; the diversion module is provided with a voltage detection module so as to detect voltages formed on two ends of the voltage detection module; a filter module is arranged by the voltage detection module; am amplification module is arranged by the filter module; the voltage detection module is provided with a voltage grading module so as to grade the voltage result detected by the voltage detection module; a voltage / current conversion module is arranged by the voltage detection module; the voltage drop on the diverter is collected, filtered and amplified, and the amplified voltage value is collected by the voltage detection module and converted into a current value; a CAN bus transmission module can send the current value to a control unit of the upper grade, thus improving current sampling accuracy; a voltage limit module and a current leakage detection module can improve the safety.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a current sampling device based on a shunt. Background technique [0002] At present, when manufacturing new energy vehicles, using electric energy as the power source is the most common new energy vehicle. Since electric energy is used as power, it is necessary to use a current sampling device to sample the current when using it. The current sampling device performs sampling, but the current sampling is easy to cause current loss, resulting in inaccurate current sampling. Therefore, it is particularly important to solve the problem of inaccurate detection caused by current loss during current sampling. Contents of the invention [0003] The purpose of the present invention is to provide a current sampling device based on a shunt, which collects the voltage drop on the shunt, filters and amplifies, and finally collects the amplified voltage value through a voltage detection ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a current sampling device based on a shunt, which collects the voltage drop on the shunt, filters and amplifies, and finally collects the amplified voltage value through a voltage detection module, converts it into a current value, and transmits it through the CAN bus The module is sent to the upper-level control unit to improve the accuracy of current sampling and solve the problem of inaccurate detection caused by current loss during current sampling