Unlock instant, AI-driven research and patent intelligence for your innovation.

Series energy storage multi-mode equalization circuit based on BuckBoost conversion

An equalizing circuit, multi-mode technology, applied in charge equalizing circuits, circuit devices, battery circuit devices, etc., can solve problems such as inflexible working methods, and achieve the effect of improving equalization speed and equalization efficiency.

Inactive Publication Date: 2018-09-11
HARBIN INST OF TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention overcomes the shortcoming that the existing equalization circuit is inflexible in the working mode when realizing the energy balance of the monomer, and can realize multiple equalization processes to work at the same time, and has the characteristics of flexible equalization mode and fast equalization speed. The present invention provides A multi-mode equalization circuit for series energy storage based on BuckBoost transformation

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
  • Series energy storage multi-mode equalization circuit based on BuckBoost conversion
  • Series energy storage multi-mode equalization circuit based on BuckBoost conversion
  • Series energy storage multi-mode equalization circuit based on BuckBoost conversion

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Adjacent energy storage units perform energy balance, combined with figure 2 , when there are 5 energy storage cells, the cell B 1 with B 2 To balance, monomer B 4 and B 5 The situation of equalization is taken as an example to illustrate, and the unmentioned switch tubes and bidirectional switches are all in the off state.

[0021] Energy storage unit B 1 , B 2 , switch tube S 1 , S 2 , inductance L 1 and a bidirectional switch Q 1 , Q 2a Constitute BuckBoost converter, bidirectional switch Q 1 , Q 2a is always on. When S 1 Conduction, S 2 When shutting down, B 1 For inductance L 1 for energy storage, S 1 In shutdown, L 1 energy through S 2 pass to B 2 , similarly, the control switch S 2 The turn-on and turn-off can turn B 2 The energy is transferred to B 1 , which realizes monomer B 1 with B 2 energy balance. Similarly, energy storage unit B 4 , B5 , switch tube S 4 , S 5 , inductance L 4 and a bidirectional switch Q 3a , Q 4 Constitut...

specific Embodiment approach 2

[0022] The energy storage unit performs energy balance with the adjacent group, combining image 3 , when there are 5 energy storage cells, the cell B 1 with monomer B 2 , B 3 , B 4 , B 5 The case where a group is formed to perform equalization is taken as an example to illustrate that the unmentioned switching tubes and bidirectional switches are all in the off state.

[0023] Energy storage unit B 1 , B 2 , B 3 , B 4 , B 5 , switch tube S 1 , S 2 , S 3 , S 4 , S 5 , inductance L 1 and a bidirectional switch Q 1 Constitute BuckBoost converter, bidirectional switch Q 1 is always on. When S 1 conduction, S 2 , S 3 , S 4 , S 5 When shutting down, B 1 For inductance L 1 for energy storage, S 1 In shutdown, L 1 energy through S 2 , S 3 , S 4 , S 5 passed to by B 2 , B 3 , B 4 , B 5 The energy storage group formed, similarly, simultaneously controls the switching tube S 2 , S 3 , S 4 , S 5 The turn-on and turn-off can turn B 2 , B 3 , B 4 , ...

specific Embodiment approach 3

[0024] Adjacent energy storage groups perform energy balance, combining Figure 4 , when there are 5 energy storage cells, the cell B 2 , B 3 The energy storage group and monomer B 4 , B 5 The situation where the energy storage group is formed to perform equalization is taken as an example to illustrate, and the unmentioned switching tubes and bidirectional switches are all in the off state.

[0025] Energy storage unit B 2 , B 3 , B 4 , B 5 , switch tube S 2 , S 3 , S 4 , S 5 , inductance L 3 and a bidirectional switch Q 1a , Q 3 Constitute BuckBoost converter, bidirectional switch Q 1a , Q 3 is always on. When S 2 , S 3 conduction, S 4 , S 5 When shutting down, B 2 , B 3 The energy storage group consisting of the inductance L 3 for energy storage, S 2 , S 3 In shutdown, L 3 energy through S 4 , S 5 passed to by B 4 , B 5 The energy storage group composed of, similarly, the control switch tube S 4 , S 5 The turn-on and turn-off can turn B 4 , ...

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 invention relates to a series energy storage multi-mode equalization circuit based on BuckBoost conversion, and belongs to the technical field of power electronics. When the number of series energy storage individual bodies is n, an n-1 inductors, n switching tubes and 2n-2 two-way switches are included. The 2n-2 two-way switches are utilized, the n-1 inductors can be controlled to be in one of the three states of open circuit, short circuit and access, and with the use of the n switching tubes for cooperation, a group formed by an individual body or adjacent individual bodies and anotherindividual body or group adjacent to the group, and inductors in an accessed state can form a BuckBoost converter to realize transmission of balanced energy. Under the circumstance that the number ofthe inductors is constant, the number of high-frequency switching tubes is reduced, and only some low-frequency two-way switches are added, the series energy storage multi-mode equalization circuit based on BuckBoost conversion realizes more flexible and diversified equalization functions than a traditional BuckBoost equalization circuit, and can improve the equalization speed and equalization efficiency.

Description

technical field [0001] The invention relates to a series energy storage multi-mode equalization circuit based on BuckBoost transformation, which belongs to the technical field of power electronics. Background technique [0002] The series energy storage group composed of energy storage units such as various batteries or supercapacitors is widely used in electric vehicles, new energy power generation and other fields. Due to the unavoidable differences among energy storage cells, it is very easy to overcharge or over-discharge one or some cells during series use. If the energy storage group is not balanced, the actual capacity will decrease, Therefore, the energy balance between energy storage bodies has always been one of the key technologies for the practical application of series energy storage. [0003] Generally speaking, the energy of the energy storage body is highly correlated with its voltage, so energy balance is often achieved by releasing the energy of a higher-v...

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): H02J7/00
CPCH02J7/0016
Inventor 杨威王延龙杨世彦韩基业刘晓芳
Owner HARBIN INST OF TECH