Serial energy storage power supply multipath equalization device and method

A technology of energy storage power supply and equalization device, which is applied in the direction of circuit devices, battery circuit devices, charge equalization circuits, etc., can solve the problems of large number of switching tubes and driving signals, and inability of continuous flow of inductance, so as to achieve high comprehensive utilization rate and control The effect of simple, multiple equalization paths

Inactive Publication Date: 2018-06-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention is to solve the problem of the large number of switching tubes and driving signals and the inability to continue current in the fourth type of method, and at the same time, in order to improve the flexibility of its use, the present invention provides a multi-path equalization device and method

Method used

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  • Serial energy storage power supply multipath equalization device and method
  • Serial energy storage power supply multipath equalization device and method
  • Serial energy storage power supply multipath equalization device and method

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specific Embodiment approach 1

[0025] The odd and even numbers of the monomers involved in energy transfer are different from those of the monomers. figure 2 , with odd-numbered monomer B n-1 To monomer B with an even number 2 The situation of transferring energy is used as an example to illustrate that the unmentioned switching tubes or bidirectional switches are in the off state, and the bidirectional switch Q A is always on.

[0026] bidirectional switch Q n-2 , Q n-1 and switch tube S B1 , S B2 Turn on, the inductor L starts to store energy; before the end of energy storage, turn on the switch tube S A1 , and then turn off the switch S B1 , S B2 and a bidirectional switch Q n-2 , Q n-1 , then the inductance L passes through the switch tube S A2 The body diode freewheels and is in a short-circuit state, which can make the switch tube S A2 Work in the state of synchronous rectification to reduce the conduction voltage drop; in the state of inductance short circuit, the bidirectional switch Q ...

specific Embodiment approach 2

[0028] The odd and even numbers of groups involved in energy transfer are different from those of even groups. image 3 , group B with an even number n-2 , B n-1 , B n To odd-numbered group B 1 , B 2 , B 3 The situation of transferring energy is used as an example to illustrate that the unmentioned switching tubes or bidirectional switches are in the off state, and the bidirectional switch Q A is always on.

[0029] bidirectional switch Q n , Q n-3 and switch tube S B1 , S B2 Turn on, the inductor L starts to store energy; before the end of energy storage, turn on the switch tube S A2 , and then turn off the switch S B1 , S B2 and a bidirectional switch Q n-3 , Q n , then the inductance L passes through the switch tube S A1 The body diode freewheels and is in a short-circuit state, which can make the switch tube S A1 Work in the state of synchronous rectification to reduce the conduction voltage drop; in the state of inductance short circuit, the bidirectional ...

specific Embodiment approach 3

[0031] The odd and even numbers of the groups and monomers involved in energy transfer are the same, and the combined Figure 4 , group B with an even number n-2 , B n-1 , B n To monomer B with an even number 2 The situation of transferring energy is taken as an example, and the unmentioned switching tubes or bidirectional switches are all in the off state.

[0032] bidirectional switch Q A , Q n-3 , Q n and switch tube S B1 , S B2 Turn on, the inductor L starts to store energy; before the end of energy storage, turn on the switch tube S B4 , then turn off the bidirectional switch Q A , Q n-3 , Q n , then the inductance L passes through the switch tube S B3 The body diode freewheels and is in a short-circuit state, which can make the switch tube S B3 Work in the state of synchronous rectification to reduce the conduction voltage drop; in the state of inductance short circuit, the bidirectional switch Q 1 , Q 2 open, put B 2 Connect between nodes A and B; in the...

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Abstract

The invention relates to a serial energy storage power supply multipath equalization device and a serial energy storage power supply multipath equalization method, which belong to the technical fieldof power electronics. For n serial energy storage single bodies, the multipath equalization device is composed of an inductor L, 6 switching tubes SA1, SA2, SB1, SB2, SB3, SB4 and n+2 bidirectional switches QA, Q0, Q1, Q2,...Qn. An odd number of adjacent single bodies serves as units for releasing energy and receiving energy, a unit having a single body number equal to 1 is a single body, and a unit having a single body number greater than or equal to 3 is a group. Through controlling the on-off of the switching tubes and the bidirectional switches, energy can be transferred between the unitsand the inductor, and the inductor operates in a short-circuit state when different units are switched. The serial energy storage power supply multipath equalization device and the serial energy storage power supply multipath equalization method can realize direct transfer of energy between arbitrary units, namely, can realize direct transfer of energy between arbitrary single bodies, between an arbitrary single body and an arbitrary group and between arbitrary groups, and have the advantages of short energy transfer path and high equalization efficiency.

Description

technical field [0001] The invention relates to a multi-path equalization device and method for a series energy storage power supply, belonging to the technical field of power electronics. Background technique [0002] Energy storage bodies such as lead-acid batteries, lithium-ion batteries, and supercapacitors are widely used in fields such as electric vehicles, energy storage systems, and new energy power generation. In many applications, series energy storage bodies are usually formed in series to increase the output voltage. Although with the advancement of technology, the consistency of energy storage cells has gradually improved, but after a long period of use, there may still be large differences in the parameters of the cells, and it is very easy for one or some cells to be overcharged or over-discharged, resulting in The actual capacity decreases and the service life decreases. Therefore, energy balance technology is one of the necessary technologies in the practi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0016
Inventor 杨威张劲杨世彦韩基业刘晓芳牟世荣
Owner HARBIN INST OF TECH
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