Double-battery parallel connection control method realized by software

Abstract

The invention relates to a double-battery parallel connection control method realized by software. The double-battery parallel connection control method comprises the steps of a first function realizing step, through a communicating line for connecting a first battery A with an electronic control device and a communication line for connecting a second battery with the electronic control device, reading inner information of BMS1 and BMS2 in real time, thereby realizing comprehensive and in-time acquisition of battery information; a second function realizing step, when a fact that voltage of thedouble batteries exceeds a preset threshold is detected, switching off the battery with relatively high voltage, and entering a single-battery power supplying state; when an abnormal state of shortcircuit protection, over-temperature protection and overvoltage protection occurs in a random one in the double batteries, switching off the battery with abnormity, thereby realizing protection in the abnormal state of the battery; and a third function realizing step, recovering the battery from the abnormal state. The double-battery parallel connection control method has advantages of saving hardware cost and mounting space, realizing real-time monitoring management of the battery state, and correcting existing problems or adding new functions through software upgrading.

Description

technical field [0001] The invention belongs to an electric vehicle, in particular to a dual-battery parallel control method realized by software. Background technique [0002] In electric vehicle applications, in many cases, in order to increase the cruising range, it is necessary to use two battery packs in parallel, which can be called a dual-battery parallel power supply system. [0003] In the dual-battery parallel power supply system, due to the differences in the individual characteristics of the two batteries, some problems may occur: for example, if the voltage difference between the two batteries is large, if they are directly connected in parallel, the high-voltage battery will charge the low-voltage battery with a large current, and the battery Fever, may explode in severe cases. [0004] In order to solve a series of problems in the dual-battery parallel power supply system, the traditional method is to add a hardware control board, which is equivalent to addin...

AI Technical Summary

Problems solved by technology

[0003] In the dual-battery parallel power supply system, due to the differences in the individual characteristics of the two batteries, some problems may occur: for example, if the voltage difference between the two batteries is large, if they are directly connected in parallel, the high-voltage battery will charge the low-voltage battery with a large current, and the battery Fever, can explode in severe cases

Additional hardware costs are required, and due to the volume and heat dissipation requirements of electronic switches, a certain amount of installation space is required

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