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Direct-current converter and electric automobile direct-current power supply system

A technology for DC converters and power supply systems, applied in electric vehicles, conversion equipment without intermediate conversion to AC, battery circuit devices, etc., can solve the problems of insufficient stability and safety of DC converters, and achieve simple control strategies, The effect of fast response and improved power density

Inactive Publication Date: 2013-10-09
SUZHOU INOVANCE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a DC converter and a DC power supply system for an electric vehicle in view of the insufficient stability and safety of the DC converter in the above-mentioned electric vehicle

Method used

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  • Direct-current converter and electric automobile direct-current power supply system
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  • Direct-current converter and electric automobile direct-current power supply system

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] In the present invention, by integrating the functions of Boost (boost) converter and Buck (step-down) converter on the DC converter, supercapacitors and batteries are combined to form a composite stack, which solves the shortcoming of pure supercapacitor electric vehicles with short mileage , At the same time avoid the phenomenon of instantaneous high current charging and discharging of the battery, so that the life of the battery has been extended.

[0023] like figure 1 Shown is a schematic diagram of an embodiment of the DC converter of the present invention. The DC converter in this e...

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Abstract

The invention provides a direct-current converter which comprises a first end port, a second end port, a first direct-current bus, a second direct-current bus, a third direct-current bus, three one-phase half bridges and a logic control unit, wherein each one-phase half bridge comprises a first power unit, a second power unit and an electric inductor, and the lock control unit is respectively connected to the control end of the first power unit and the control end of the second power unit and enables the three one-phase half bridges to work alternately at a 120-degree phase difference through output of a PWM control signal. The invention further provides an electric automobile direct-current power supply system which is provided with the direct-current converter. Due to the fact that two sets of power units are controlled through the logic control unit, bidirectional energy conversion between a storage battery and a super capacitor can be simultaneously achieved, the power density of a product is improved, and the cost of the product is reduced.

Description

technical field [0001] The invention relates to the field of electric vehicles, more specifically, to a DC converter and a DC power supply system for electric vehicles. Background technique [0002] Under the pressure of energy and environmental protection, new energy vehicles will undoubtedly become the development direction of future automobiles. An electric vehicle refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and conforming to the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional cars, its prospects are widely optimistic. [0003] In an electric vehicle, the electric energy of the battery is converted into electric energy suitable for driving the electric motor through a DC / DC converter. At present, in the DC / DC converter in electric vehicles, the low-voltage side adopts a full-bridge circuit, and the high-voltage side adopts a controllable voltage d...

Claims

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Application Information

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IPC IPC(8): H02M3/10H02J7/00
Inventor 梁红光
Owner SUZHOU INOVANCE TECH CO LTD
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