BMS current detection unit automatic calibration device and calibration method

Abstract

The invention discloses a BMS current detection unit automatic calibration device and calibration method. The automatic calibration device comprises an upper computer for controlling the whole matching calibration process and performing automatic calculation on the error offset and the gain; a program-controlled constant-current source which is controlled by the upper computer and connected with the upper computer, wherein the program-controlled constant-current source can be used to accurately output a preset current as the calibration signal source according the control command of the program-controlled constant-current source; and a communication module for establishing the data exchange channel between the upper computer and the current detection unit to acquire the detection value of the current detection unit and store the error offset and the gain into a nonvolatile memory in the current detection unit, and a current sensor, and a shunt is arranged between the current detection unit and the program-controlled constant-current source. The automatic calibration device provided in the invention has advantages of simple operation and high production efficiency, and can be used to avoid problems of reduced efficiency and easy misoperation after works work continuously. Moreover, the comparison between the single calibration result and the normal result is added, and the disordered shunt type problem can be avoided.

Description

technical field [0001] The invention relates to the technical field of current detection, in particular to an automatic calibration device and a calibration method for a BMS current detection unit. Background technique [0002] With the continuous growth of market demand for electric vehicles, the production of new energy vehicle power batteries and BMS is bound to usher in explosive growth. This puts forward higher requirements on the production efficiency of enterprises. Due to the continuous development and updating of BMS products, the corresponding production lines are usually in the state of manual or semi-automatic production, and the production efficiency is low. For the production process that requires workers to perform multiple operation steps continuously, it is often the bottleneck of production efficiency. [0003] Take the matching calibration process of the BMS current detection unit and the current sensor as an example. At present, in the production proces...

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides an automatic calibration device and a calibration method for a BMS current detection unit. The present invention solves the technical problems of complex calibration procedures, low production efficiency, and large calibration errors in the prior art for BMS current detection units.

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