Four-single-body direct balancing device and method of series energy storage body

An equalizing device and four-cell technology, applied in circuit devices, charge equalization circuits, battery circuit devices, etc., can solve the problems of low energy equalization efficiency, long energy equalization path, and inability to solve the point-to-point direct energy transfer of energy storage cells. , to achieve the effect of solving point-to-point direct equalization, short energy transfer path, and fast equalization speed

Active Publication Date: 2017-03-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems that the existing equalization device cannot solve the point-to-point direct energy transfer between any two energy storage cells, the long energy equalization path and the low energy equalization efficiency. Device and method

Method used

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  • Four-single-body direct balancing device and method of series energy storage body
  • Four-single-body direct balancing device and method of series energy storage body
  • Four-single-body direct balancing device and method of series energy storage body

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine figure 2 This embodiment is described. When the four-cell direct equalization device of the series energy storage body described in this embodiment realizes the energy balance of the cells in the group, it works in the Buck-Boost mode. Take the first group of the first energy storage unit B 1 The highest energy, the second energy storage unit B 2 The lowest energy is taken as an example. At this time, B 1 Energy is fed to B 2 .

[0021] Such as figure 2 As shown, only the first bidirectional switch M is allowed in this state 1 , the fifth two-way switch M 5 action, the first energy storage unit B 1 , the second energy storage unit B 2 , the first two-way switch M 1 , the first coupled inductor L 1 , the fifth two-way switch M 5 Constitute Buck-Boost converter.

[0022] When the 1st bidirectional switch M 1 conduction, the 5th bidirectional switch M 5 When shutting down, the first energy storage unit B 1 via the ...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination image 3 This embodiment is described. When the four-cell direct equalization device of the series energy storage body described in this embodiment realizes the energy balance of the cells between groups, it works in the flyback mode. Take the first group of the first energy storage unit B 1 The highest energy, the third energy storage unit B in the second group 3 The lowest energy is taken as an example. At this time, B 1 Energy is fed to B 2 .

[0024] Such as image 3 As shown, only the first bidirectional switch M is allowed in this state 1 , the third two-way switch M 3 action, the first energy storage unit B 1 , the third energy storage unit B 3 , the first two-way switch M 1 , the first coupled inductor L 1 , the third coupled inductor L 3 , the third two-way switch M3 constitute a flyback converter.

[0025] When the 1st bidirectional switch M 1 conduction, the third bidirectional switch M 3 When shutti...

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Abstract

The invention provides a four-single-body direct balancing device and method of a series energy storage body, relates to a series energy storage group balancing circuit, and aims at solving the problems that an existing balancing device cannot solve the problem of point-to-point direct energy transfer between any two energy storage single bodies, the energy balancing path is long and the energy balancing efficiency is low. The series energy storage body is formed by connecting four energy storage single bodies in series, wherein each two energy storage single bodies are taken as one group; the four-single-body direct balancing device comprises four coupling inductors and six two-way switches; direct energy transfer between any single bodies can be achieved through controlling the two-way switches; a Buck-Boost working mode is adopted during energy balancing within groups; and a flyback working mode is adopted during energy balancing between groups. According to the four-single-body direct balancing device and method of the series energy storage body, the implementation mode is simple, the energy transfer path in the balancing process is short, the balancing speed is relatively high and the balancing efficiency is relatively high.

Description

technical field [0001] The invention relates to a four-unit direct equalization circuit of series energy storage bodies. Background technique [0002] Energy and environmental issues have become the focus of global attention, and various new energy technologies emerge in an endless stream, followed by higher requirements for energy storage technologies. Voltage-type energy storage bodies based on power batteries or supercapacitors usually have the advantages of high power density, safety and cleanliness, and have been widely used in technical fields requiring energy storage such as electric vehicles, space power supplies, and power pulse devices. Whether it is a power battery or a supercapacitor, the voltage and capacity of its monomers are limited. In many practical applications, several or even hundreds of monomers are usually connected in series to form an energy storage group with a suitable voltage. Due to the differences in the chemical properties of the energy storag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0019
Inventor 杨威杨世彦韩基业谭宇董青山
Owner HARBIN INST OF TECH
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