Management system circuit used for hybrid power of hybrid electric bus

Abstract

The invention provides a management system circuit for a hybrid electric bus, in particular to a management system circuit used for a hybrid power of a hybrid electric bus. The management system circuit comprises a hybrid power control circuit and a hybrid power circuit, wherein the hybrid power control circuit comprises an intelligent power module; the hybrid power circuit comprises a storage battery and an ultra-capacitor which are of a parallel-connection structure; the storage battery is connected with the intelligent power module in series; and the ultra-capacitor is connected with the intelligent power module in series. By using the management system circuit used for the hybrid power of the hybrid electric bus, the flexibility of the storage battery access control and the reliability of the system can be ensured; the seamless access or the seamless switch, the flexibility of power distribution and the diversification of charging and discharging modes can be realized, the system efficiency is further improved and the system life is prolonged.

Description

technical field [0001] The invention relates to a management system circuit of a hybrid electric passenger car, in particular to a management system circuit for a composite power supply of a hybrid electric passenger car. Background technique [0002] For electric vehicles, the greatest significance of the on-board power supply is to reduce the fuel consumption of the vehicle, improve the efficiency of regenerative braking energy recovery, optimize the working state of the power unit, and save energy and reduce emissions. Its performance will directly determine HEV future development. However, due to the complexity and variability of the vehicle's driving conditions, the requirements for the vehicle power supply system are also more stringent, not only requiring high power density and large specific energy (small size, light weight), high efficiency and high rate Charge and discharge characteristics, wide operating temperature adaptability, stable performance, economical se...

AI Technical Summary

Problems solved by technology

[0005] 1. The battery capacitors are directly connected in parallel, which has a simple structure, high controllability, high flexibility in battery capacitor configuration, and low cost; however, its energy mismatch is only determined by the internal resistance of the battery and capacitor and cannot be used selectively. The power boost capability of super capacitors Not fully utilized, so the energy efficiency of the power supply and system is low;

[0006] 2. The capacitor side is connected to bidirectional DC / DC. Since the output characteristics of the supercapacitor are relatively soft, the performance of the DC / DC is improved, but the power of the DC / DC is too large, the cost is high, and the design is difficult;

[0008] 4. Capacitors and batteries are connected to bidirectional DC / DC, although the energy efficiency is greatly improved, but the structure is the most complicated and the cost is high

The speed of the contact power system is slow, and the performance of the strong points of safety and seamless switching is easily affected; there may be a situation of electric shock and burning caused by on-load switching, and the reliability and life are threatened

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