Dynamics battery-super capacitance mixed dynamic system for electric car

A technology of hybrid power system and power battery, which is applied in the direction of electric vehicles, electric energy storage systems, battery circuit devices, etc. It can solve the problems of no discharge, small discharge current of power battery packs, and low output power of power systems, so as to improve energy efficiency. Efficiency and service life, high energy conversion efficiency, high charge and discharge efficiency

Inactive Publication Date: 2008-08-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the frequent acceleration of the vehicle under urban working conditions, the power battery pack is frequently discharged with high current, which reduces the energy efficiency and service life of the battery pack, thus affecting the energy efficiency and service life of the vehicle
[0004] On the other hand, when electric vehicles are running in urban areas, due to the cha...

Method used

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  • Dynamics battery-super capacitance mixed dynamic system for electric car
  • Dynamics battery-super capacitance mixed dynamic system for electric car
  • Dynamics battery-super capacitance mixed dynamic system for electric car

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Embodiment Construction

[0024] Referring to the accompanying drawings, specific embodiments of the present invention will be further described.

[0025] The structure of the power battery-supercapacitor hybrid system proposed by the present invention is shown in Figure 2. The system includes: a power battery pack, a step-up DC / DC converter, a motor controller, a bidirectional DC / DC converter, and a supercapacitor pack and 24V battery; the connection relationship is: the low-voltage end of the boost DC / DC converter is connected to the output end of the power battery pack, and the high-voltage end of the boost DC / DC converter is connected to the motor controller; at the same time, the boost DC / DC The high-voltage end of the DC converter is directly connected to the high-voltage end of the supercapacitor bank and the bidirectional DC / DC converter, and the low-voltage end of the bidirectional DC / DC converter is connected to the 24V battery.

[0026] The embodiment of each component of this system is desc...

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Abstract

The invention relates to a power battery-super capacitor hybrid power system for electric automobiles, belonging to the electric automobile technical field. The power battery-super capacitor hybrid power system for the electric automobiles comprises a power battery pack, a motor controller and a 24V storage battery, a boost DC /DC converter, a bi-directional DC/DC converter and a super capacitance group, wherein, the low voltage end of the boost DC /DC converter is connected with the output end of the power battery pack, the high voltage end of the boost DC /DC converter is connected with the motor controller; the super capacitance group and the high voltage end of the bi-directional DC/DC converter are directly hitched with the high voltage end of the boost DC/DC converter, and the low voltage end of the bi-directional DC/DC converter is connected with the 24V storage battery. The power battery of the power battery-super capacitor hybrid power system for the electric automobiles has smooth output current, small peak current, high discharge efficiency and long service life; when the battery pack SOC is lower, the hybrid system still ensures the normal power output capability; and the super capacitance can directly absorb the braking feedback energy and has high energy conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a power battery-supercapacitor hybrid power system for electric vehicles. Background technique [0002] Electric vehicles have the characteristics of environmental protection, energy saving and high energy conversion efficiency, and have been paid more and more attention. The power battery pack is the core part of the electric vehicle. Improving the energy efficiency of the power battery pack during the discharge process, the utilization rate of the battery pack's energy storage, and prolonging the service life of the power battery pack are one of the key technologies for the development of the electric vehicle power system. [0003] Restricted by the working principle and manufacturing level of power batteries, the discharge efficiency of advanced power battery packs (such as nickel-metal hydride battery packs, lithium-ion battery packs, etc.) for electric ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/34H02J15/00B60L11/18
CPCY02T10/70Y02T10/72
Inventor 黄勇陈全世仇斌陈伏虎
Owner TSINGHUA UNIV
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