Power battery energy storage type tramcar charging system and charging method thereof

Abstract

The invention relates to the technical field of urban rail electric drive systems, in particular to a power battery energy storage type tramcar charging system and a charging method thereof. The powerbattery energy storage type tramcar charging system comprises a tramcar, a charging control system, a vehicle-mounted energy storage management system and a ground signal machine, wherein the tramcartakes power from a contact rail by using a pantograph type current collector, the charging control system is used for supplying energy, the vehicle-mounted energy storage management system is arranged in the tramcar, and the ground signal machine is arranged in a platform; the charging control system consists of a charger and a ground charger controller; the contact rail is connected with the charger through a cable; and the charging control system and the tramcar are both provided with WIFI-AP. By using a WIFI-AP technology, the difficult problem that a lot of data are transmitted in real time when a lithium battery is charged is solved; by considering a situation that uplink and downlink vehicles simultaneously enter a station, the vehicle-mounted energy storage management system helpsthe charging control system to distinguish corresponding vehicles by obtaining current platform number information from a signal system because wireless transmission has no directionality; and therefore, the difficult problem of charging vehicle recognition is solved.

Description

technical field [0001] The invention relates to the technical field of urban rail electric transmission systems, in particular to a power battery energy storage type tram charging system and a charging method thereof. Background technique [0002] Tram is a light-duty rail transit vehicle that is driven by electricity and runs on the track. Tram is a kind of public transportation. It is driven by electricity and the vehicle does not emit exhaust gas. Therefore, it is a pollution-free and environmentally friendly transportation. In the existing tram charging solutions, the on-board energy storage power supply method basically uses a supercapacitor or a supercapacitor plus a small-capacity lithium battery. Due to the low energy density of the supercapacitor, the on-board energy storage capacity is limited, and the cruising range of the vehicle is limited. Short; supercapacitors combined with small-capacity lithium batteries can increase the energy storage capacity of the vehic...

AI Technical Summary

Problems solved by technology

In the existing tram charging solutions, the on-board energy storage power supply method basically uses a supercapacitor or a supercapacitor plus a small-capacity lithium battery. Due to the low energy density of the supercapacitor, the on-board energy storage capacity is limited, and the cruising range of the vehicle is limited. Short; supercapacitors combined with small-capacity lithium batteries can increase the vehicle’s energy storage capacity, but the energy increase is limited. Although it can effectively increase the station distance, it still needs station charging

This project adopts the on-board energy storage method of pure lithium battery, and the on-board energy storage capacity is increased by more than 5 times, which effectively improves the cruising range. However, due to the characteristics of lithium batteries, the risk of blind charging of lithium batteries is high, especially in the fast charging mode. The charger needs to obtain the characteristics of the lithium battery to control the charging current and voltage to charge the lithium battery, so the charger needs to establish a communication channel with the on-board lithium battery

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