Composite automatic synchronous energy transfer equalization circuit and equalization method for series battery pack

A series battery pack and automatic equalization technology, applied in battery circuit devices, electric vehicles, circuit devices, etc., can solve the problems of long equalization time, complex cost of equalization system, low equalization efficiency, etc. Low, efficient effect

Inactive Publication Date: 2012-05-02
SHANGHAI 01 POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned defects in the prior art, the present invention provides an energy synchronous transfer composite automatic equalization circuit and equalization method for series battery packs, which can overcome the long equalization time, low equalization efficiency, and overly complicated equalization system of the prior art. and high cost defects, to achieve online automatic, fast and efficient balancing of batteries and capacitors, and its high reliability, low cost, small size, light weight, comprehensive functions, easy to scale, industrial manufacturing and application

Method used

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  • Composite automatic synchronous energy transfer equalization circuit and equalization method for series battery pack
  • Composite automatic synchronous energy transfer equalization circuit and equalization method for series battery pack

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Embodiment 1

[0038] Such as figure 1 As shown, the energy synchronous transfer composite automatic equalization circuit of the series battery pack of the present invention includes: n (n≥1) battery unit energy bidirectional transfer composite equalization modules set according to the number of battery cells in the series battery pack, i.e. battery Composite balance module 1 for bidirectional transfer of unit energy, ..., composite equalization module n for bidirectional transfer of battery unit energy; main control module 2; positive balance bus BB+ and negative balance bus BB-; energy storage element 3 for caching energy . Among them, battery unit energy bidirectional transfer composite equalization modules 1~n are respectively correspondingly composed of switch matrices 11~n1, equalization control modules 12~n2, bidirectional DCDC modules 13~n3, and discharge equalization circuits (141~14k) with the same structure. ~(n41~n4j), mode control switches 15~n5, current direction limiting devi...

Embodiment 2

[0054] For applications where the battery capacity is small or the requirement for the equalization time is not very high, the mode 2 of the embodiment 1 using the energy transfer compound equalization in each battery module can be omitted, so as to further simplify the equalization circuit. For this reason, the connection circuit between the bidirectional DCDC module 13, ..., n3 and the battery module in Embodiment 1 and the current direction limiting devices 16-n6 and module control switches 15-n5 in the connection circuit are cancelled, and the bus connection is cancelled. The switches (17, 18)-(n7, n8) prohibit the mode 2 in the embodiment 1 that adopts the composite balance of energy transfer in each battery module, and the others are the same as the embodiment 1, and will not be repeated here.

Embodiment 3

[0056] By making the bidirectional DCDC modules 13, .

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Abstract

The invention discloses a composite automatic synchronous energy transfer equalization circuit and an equalization method for a series battery pack. The circuit comprises n composite two-way battery unit energy transfer equalization modules, a master control module and equalization buses, wherein the composite two-way battery unit energy transfer equalization modules are arranged according to the number of battery units in the series battery pack; n is more than or equal to 1; the composite two-way battery unit energy transfer equalization module corresponds to a battery module consisting of k battery units which are connected in series; k is more than 1; and the composite two-way battery unit energy transfer equalization module consists of a switch matrix, an equalization control module, a two-way direct current (DC)-DC module, k discharge equalization circuits and a mode control switch. The composite automatic synchronous energy transfer equalization circuit and the equalization method for the series battery pack are high in reliability, low in cost, small in volume, light in weight, functionally comprehensive and easy to manufacture and use in large scale, and can be applied in the fields of electric vehicles, rail transit, wind-driven power generation and the like by which the series battery pack and a series capacitor bank are required.

Description

technical field [0001] The invention relates to the technical field of automatic equalization of series battery packs, in particular to a compound automatic equalization circuit and equalization method for synchronous energy transfer of series battery packs. Background technique [0002] Energy storage devices such as batteries and supercapacitors are widely used in various fields. How to ensure fast and efficient automatic equalization of each battery unit and capacitor unit in the series battery and capacitor group is a key technology to ensure its safety and reliability, prolong its service life, reduce its use cost and give full play to its performance. [0003] At present, for the automatic equalization of series batteries and capacitor banks, the automatic equalization method of discharging the parallel resistance of battery cells with high voltage or high power is generally adopted. The above method can balance each battery unit synchronously, but this is an energy-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 杨林羌嘉曦
Owner SHANGHAI 01 POWER TECH
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