Current online detection and automatic calibration circuit and method of multiple charge and discharge channels

Abstract

The invention discloses a fully automatic current online detection and automatic calibration circuit of multiple charge and discharge channels. The fully automatic current online detection and automatic calibration circuit comprises a current detection module, a current sampling module, a channel switching module, a calibration control module and a charge and discharge control module. The currentdetection module, the channel switching module and the charge and discharge control module are internally and separately provided with a current detection unit, a channel switching unit and a charge and discharge control unit in one to one correspondence to the charge and discharge channels, the input ends of the current detection unit are arranged in the corresponding charge and discharge channels in series, the input end of the channel switching unit and the output end of the current detection unit are connected in a one-to one corresponding mode, and the output end of the channel switchingmodule is connected with the input end of the current sampling module. The current sampling module is connected with the calibration control module through communication, and the calibration control module is connected with the charge and discharge control module through communication. The fully automatic current online detection and automatic calibration circuit of the multiple charge and discharge channels can well solve the problem of battery performance difference caused by inconsistent current of the charge and discharge channels in the production process of batteries.

Description

technical field [0001] The invention relates to a battery formation and testing circuit, in particular to a circuit structure and method for online detection and automatic calibration of the current accuracy of multiple battery charging and discharging channels. Background technique [0002] Everyone in the industry knows that lead-acid battery charging and discharging equipment needs to be calibrated before leaving the factory and after a period of use to improve current accuracy. Due to the difference in current between the channels of lead-acid battery formation equipment, the performance of the produced batteries is different, which increases the return rate of assembled batteries. [0003] At present, manual and semi-automatic methods are usually used to calibrate the current of battery formation and test equipment. The specific process of manual calibration is as follows: if a device with a current detection hole is used, it is necessary to connect the multimeter pen ...

AI Technical Summary

Problems solved by technology

This calibration method requires that the calibrated circuits must be in a stopped state and the output circuit of each channel needs to be reconnected before calibration. After calibration, the circuit should be restored to its original state. The operation is very complicated and time-consuming.

Moreover, since the main output circuit is switched by the calibration tool, the switching circuit for high-voltage and high-current lead-acid conversion equipment is large in size and high in cost. Almost no lead-acid battery manufacturers use this semi-automatic calibration method for calibration

Images