Dual-voltage emergency starting power supply with isolation-communication automatic switching technology

Abstract

The invention discloses a dual-voltage emergency starting power supply with an isolation-communication automatic switching technology, which is characterized in that a starting clamp is connected to abattery of a vehicle to be started, a main control system receives a transmitted voltage signal of the in-vehicle battery, whether a connection polarity relation between the starting clamp and the in-vehicle battery is correct or not is judged according to the voltage signal, work instruction are sent to a first branch control system and a second branch control system respectively through a firstisolation-communication circuit and a second isolation-communication circuit if the connection polarity relation is correct; the first branch control system and the second branch control system respectively read corresponding battery pack states and send the battery pack states to master control system respectively through the first isolation-communication circuit and the second isolation-communication circuit; and the master control system determines whether the corresponding battery packs have an over-temperature, low voltage, overvoltage and charging state or not based on the battery packstates, if not, adjusts switch-on and off of an automatic change-over switching circuit according to the voltage signal of the in-vehicle battery to control series-parallel connection of the first battery pack and the second battery pack so as to output operating voltage corresponding to the in-vehicle battery to assist the start of the vehicle.

Description

technical field [0001] The invention relates to the technical field of automobile emergency start power supply management system, in particular to a dual-voltage emergency start power supply with isolation communication automatic conversion technology. Background technique [0002] General emergency starting power supplies have single-voltage or dual-voltage output, but in the practical application of dual-voltage or multi-voltage output, the series or parallel connection of battery packs is basically switched by human-controlled switches, and in practical applications, the human factor is the least Stable, often there is a mismatch between internal and external voltage selection, resulting in damage to the machine or equipment due to overcharging and over-discharging. The difficulty in the automatic conversion of dual battery packs is that the serial-parallel mode of the machine cannot be fixed, and everything is determined by the external connection signal. As a result, th...

AI Technical Summary

Problems solved by technology

[0002] General emergency starting power supplies have single-voltage or dual-voltage output, but in the practical application of dual-voltage or multi-voltage output, the series or parallel connection of battery packs is basically switched by human-controlled switches, and in practical applications, the human factor is the least Stable, often there is a mismatch between internal and external voltage selection, resulting in damage to the machine or equipment due to overcharging and overdischarging

The difficulty in the automatic conversion of dual battery packs is that the serial-parallel mode of the machine cannot be fixed, and everything is determined by the external connection signal. As a result, the power supply and reference ground of the main control circuit cannot be shared with the two battery packs at the same time. When there is no fixed reference potential point , the main control system cannot support the real-time status of each battery

Images