Multi-monomer directly equalizing device and method of series battery pack

A technology of connecting battery packs and balancing devices in series, applied to battery circuit devices, circuit devices, current collectors, etc., can solve the problems of low energy balancing efficiency, inability to solve the direct energy transfer of energy storage cells, and long energy balancing paths, etc. The effect of fast equalization speed, improved equalization efficiency, and short energy transfer path

Active Publication Date: 2014-03-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to solve the problems that the existing energy balance device between energy storage cells cannot solve the problems of direct energy transfer between any two e

Method used

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  • Multi-monomer directly equalizing device and method of series battery pack
  • Multi-monomer directly equalizing device and method of series battery pack
  • Multi-monomer directly equalizing device and method of series battery pack

Examples

Experimental program
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Example Embodiment

[0023] Specific embodiment one: see figure 1 To illustrate this embodiment, the series battery pack multi-cell direct equalization device of this embodiment is composed of m+n energy storage cells connected in series, and the multi-cell direct equalization device includes a transformer and m +n two-way switches, m and n are both positive integers greater than 1;

[0024] The transformer has m+n windings, and the number of turns of the m+n windings is the same;

[0025] The first m energy storage cells in the series battery pack are the first group, and the last n energy storage cells are the second group;

[0026] Among the m+n windings of the transformer, m coils correspond to the m energy storage cells in the first group respectively, and the remaining n coils of the m+n windings of the transformer correspond to the second group respectively. There are n energy storage monomers in one-to-one correspondence,

[0027] I winding L i It is connected in series with the i-th bidirectiona...

Example Embodiment

[0030] Specific implementation manner 2: see figure 2 To illustrate this embodiment, the difference between this embodiment and the multi-cell direct equalization device of a series battery pack described in the first embodiment is that the two-way switch is composed of two internal parasitic diodes in series, and one internal parasitic diode The source of the switch tube is connected to the source of the switch tube of another internal parasitic diode.

Example Embodiment

[0031] Specific implementation manner three: see figure 2 To describe this embodiment, the difference between this embodiment and the multi-cell direct equalization device of a series battery pack described in the second embodiment is that the internal parasitic diode switch is a MOSFET.

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Abstract

The invention provides a multi-monomer directly equalizing device and method of a series battery pack, and relates to a monometer equalizing circuit of the series battery pack. The multi-monomer directly equalizing device and method of the series battery pack solve the problems that direct energy transfer between any two energy storage monomers can not be achieved, the energy equalizing path is long and the energy equalizing efficiency is low according to an existing energy equalizing device between the energy storage monomers. The series battery pack is formed by series connection of m+n monomer batteries. The multi-monomer directly equalizing device comprises a transformer and m+n bilateral switches, wherein the transformer is provided with m+n windings, the first m energy storage monomers in the series battery pack are used as the first group, and the last n energy storage monomers in the series battery pack are used as the second group; m coils in the m+n windings of the transformer are in one-to-one correspondence with the m energy storage monomers in the first group respectively, and the rest of the n coils are in one-to-one correspondence with the n energy storage monomers in the second group respectively; the m+n windings share one magnetic core, and the number of turns of the m+n windings is equal, so the energy direct transfer between any two energy storage monomers can be achieved. The multi-monomer directly equalizing device and method can be applied to the field of energy equilibrium of the series energy storage monomers.

Description

technical field [0001] The invention relates to a single equalizing circuit of a series battery pack. 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 power packs 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 that require energy storage, such as electric vehicles, space power supplies, and power pulse devices. Whether it is a power battery or a supercapacitor, the voltage level of the energy storage unit is relatively low. In practical applications, several or even hundreds of units are usually connected in series to form an energy storage power pack with a suitable voltage. Since the parameters of each energy storage unit are difficult to guarant...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 刘晓芳杨世彦陈洋韩基业赵树野
Owner HARBIN INST OF TECH
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