Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Simplified boost type electric vehicle composite power supply structure and control method thereof

A composite power supply and electric vehicle technology, applied in electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc., can solve the problems of high energy consumption and low control precision of conventional composite power supplies, and overcome the difficulty of sliding mode coefficient Determine, overcome the difficulty of measurement, and solve the mutual constraints of dynamic performance and robustness

Active Publication Date: 2017-11-07
SANMENXIA SUDA TRANSPORTATION ENERGY SAVING TECH
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of high energy consumption and low control precision of conventional composite power supplies, and provide a simplified boost-type electric vehicle composite power supply structure and its control method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Simplified boost type electric vehicle composite power supply structure and control method thereof
  • Simplified boost type electric vehicle composite power supply structure and control method thereof
  • Simplified boost type electric vehicle composite power supply structure and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are explanations but not limitations of the present invention.

[0036] The invention proposes a novel composite power supply structure of an electric vehicle, including a brand-new topology structure and an improved sliding mode control algorithm.

[0037] see figure 1 , the present invention is based on a lithium battery, a supercapacitor, three MOSFET tubes (SW1, SW2, SW3), three current limiting diodes (D1, D2, D3), two inductors (L1, L2) and a capacitor (C1) The combined variable structure (Buck, Boost) composite power supply is a DC converter for electric vehicle composite energy storage system with Buck and Boost two circuit structures that can be switched flexibly. In its topology, the positive pole of the supercapacitor is connected to one end of L1, and the other end of L1 is connected to the drain of SW1, the drain of SW2, the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a simplified boost type electric vehicle composite power supply structure and a control method thereof. The simplified boost type electric vehicle composite power supply structure comprises a lithium battery, a super capacitor, MOSFETs, a current-limiting diode, an inductor and a capacitor. When the demand power of an electric vehicle is positive, according to the SOC and the output voltages of the lithium battery and the super capacitor, a composite power supply forms a Boost circuit structure, and the duty ratio of the MOSFET SW1 or SW2 is adjusted; and when the demand power of the electric vehicle is negative, the composite power supply forms a Buck circuit structure, and the duty ratio of the MOSFET SW3 is adjusted, thereby realizing the braking energy recovery of the lithium battery and the super capacitor. According to the present invention, the multimode work of the electric vehicle on a general working condition can be satisfied, and the composite power supply simplifies the structure of a cascaded DC-DC converter, so that the energy consumption of the composite power supply is reduced, the energy conversion efficiency is improved, and a control strategy is simpler.

Description

technical field [0001] The invention belongs to the technical field of composite power supplies, and in particular relates to a lithium battery, a supercapacitor, and a multi-working-mode direct-current conversion device formed by combining MOS tubes, diodes, capacitors, and inductors and a control method thereof. Background technique [0002] Composite energy storage system, also known as composite power supply technology, is an auxiliary energy storage device with high power density added to the existing power battery, generally including superconductors, flywheels and supercapacitors. Among them, the composite energy storage system composed of secondary lithium battery and super capacitor is mainly used in the field of electric vehicles. [0003] Combine supercapacitors and lithium batteries to form a composite energy storage power system. During the working process, supercapacitors provide the high power density requirements of electric vehicles, and at the same time ful...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34H02M3/07B60L11/18
CPCB60L58/10B60L2210/10H02J7/345H02M3/07Y02T10/70Y02T10/7072Y02T90/12
Inventor 汪建林续丹周欢王斌马光亮
Owner SANMENXIA SUDA TRANSPORTATION ENERGY SAVING TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com