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Equalization device for series battery packs

A technology of series-connected battery packs and equalizers, applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve problems that cannot meet the application needs of high-voltage battery modules, and achieve high correlation, strong complexity, and speed And the effect of delivery efficiency improvement

Active Publication Date: 2015-07-08
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, there are few solutions for inter-group balancing, which cannot meet the application needs of high-voltage battery modules

Method used

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  • Equalization device for series battery packs
  • Equalization device for series battery packs
  • Equalization device for series battery packs

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Embodiment Construction

[0031] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] The present invention is based on a power electronic conversion circuit and a high-frequency transformer with an intermediate tap. The series battery pack balancing device provided by the present invention includes N battery packs (N≤100); the battery packs are connected in series, which is called a series battery pack. ; The battery pack includes M monomers (the number of M depends on the project, which is more than a dozen or even more), and the monomers are connected in series; the monomers include batteries and balancing modules; the batteries The two-terminal parallel equalization module, the battery is mainly for lithium iron phosphate batteries and other lithium-ion batteries, and is also suitable for lead-acid batteries and super capacitor banks.

[0033] Figure 5 It is a schematic diagram of the monomer circuit of...

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Abstract

The invention belongs to the technical field of energy storage, and particularly relates to an equalization device for series battery packs. The device is used for equalization regulation and management between single energy-storage batteries and between battery packs. The device comprises at least one battery pack. The battery packs are connected in series to form the series battery packs. Each battery pack comprises at least two single batteries which are connected in series. The single battery comprises a battery and an equalization module. The two ends of the battery are connected in parallel with the equalization module. By the equalization device, point-to-point energy equalization between the battery packs and between the single batteries in each battery pack is realized, so that equalization speed is greatly increased, and equalization efficiency is greatly improved; and electrically isolated energy channels are formed between every two packs, so that a system can be adapted to many kinds of application from a low voltage grade to a high voltage grade, and has high universality, and a complex equalization strategy can be conveniently realized by a flexible hardware operating mode.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and in particular relates to an equalizing device for series-connected battery packs, which is used for the balance regulation and management between energy storage battery cells and battery packs. Background technique [0002] In a series battery pack, the inconsistency of the battery cells reduces the performance and service life of the entire battery pack. During use, the capacity utilization rate of the battery pack decreases, and the overall performance (such as: the number of charge and discharge cycles after grouping is less than that of a single cell) Charge and discharge times) cannot reach the single battery index. In order to solve the inconsistency of series battery packs, the battery management system is usually equipped with a balance management circuit. [0003] Existing equalization methods mainly include energy-consumption equalization using discharge resistor equalizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 黄吕超
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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