Vehicle Energy Management System for Pure Electric Buses with Composite Energy Storage System
A vehicle energy management and composite energy storage technology, which is applied in the field of pure electric bus energy management system, can solve the problems of shortening the service life of batteries, reasonable distribution, and low power performance of the vehicle, and achieve the effect of prolonging the service life
Inactive Publication Date: 2017-08-11
JILIN UNIV
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Problems solved by technology
At present, many schemes are used to simply connect the two in parallel. Although it can improve the energy utilization efficiency of the vehicle to a certain extent, due to the complicated urban working conditions, the existing energy management system cannot adjust the two according to the actual road conditions. The power is distributed reasonably, so that the advantages of the two cannot be fully utilized, and the service life of the battery is shortened; in addition, the existing hybrid energy management system has a low recovery efficiency for vehicle braking energy, resulting in low power performance of the vehicle
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[0036] In order to further elaborate on the technical solution of the present invention, in conjunction with the accompanying drawings, the specific implementation of the present invention is as follows:
[0037] Such as figure 1 As shown, the present invention discloses a pure electric bus energy management system with a composite energy storage system, the system includes: a high voltage battery system, AC-DC or DC-AC conversion system, charging interface system, low-voltage accessories system, vehicle energy management ECU and driving intention and road condition recognition system. The AC-DC or DC-AC conversion system, the charging interface system and the low-voltage accessory system are respectively connected to the high-voltage battery system, and the driving intention and road condition recognition system, the low-voltage accessory system and the high-voltage battery system are respectively connected to the vehicle energy management ECU.
[0038] Among them, the main ...
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The invention discloses a pure electric public bus entire energy management system with a composite energy storage system, which comprises a high voltage battery system, an AC / DC (DC / AC) conversion system, a charge interface system, a low voltage accessory system and an entire energy management ECU as well as comprises a driving intention and road condition recognition system, wherein the high voltage battery system is formed by connecting a high voltage battery sequence system and a super capacitor sequence system in parallel and then connecting the parallel high voltage battery sequence system and super capacitor sequence system with a bidirectional DC / DC converter and a bidirectional DC / DC controller sequentially in series; and the high voltage battery system, the low voltage accessory system and the driving intention and road condition recognition system are respectively in bidirectional control connection with the entire energy management ECU, so that the entire energy management ECU distributes the power of a high voltage battery sequence and the power of a super capacitor sequence according to the signal feedback of the driving intention and road condition recognition system. The system disclosed by the invention can realize reasonable distribution of the power between a battery and a super capacitor in the system according to the actual road condition of a city, thereby further improving the entire energy utilization ratio.
Description
technical field [0001] The invention belongs to the field of vehicle energy management, is suitable for composite energy management composed of batteries and supercapacitors, and in particular relates to a pure electric bus vehicle energy management system with a composite energy storage system. Background technique [0002] Due to the limited reserves of petroleum energy substances, with the rapid expansion of industry, economy and consumption, the supply of petroleum is becoming increasingly tense, and the exhaust gas of automobiles has caused huge pollution to the environment, which has severely restricted the future development of traditional fuel-powered vehicles. , Electric vehicles are the mainstream direction of the future development of the automotive industry. [0003] The power supply system is an important part of pure electric vehicles. Now general electric vehicles use batteries or supercapacitors as vehicle energy sources. Batteries have high specific energy b...
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IPC IPC(8): B60L11/18
CPCB60L50/51B60L53/20B60L58/12Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 李静石求军夏承贺张雪碧孙成伟杨威
Owner JILIN UNIV