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
CN102437609AInactive Publication Date: 2012-05-02SHANGHAI 01 POWER TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI 01 POWER TECH
Publication Date
2012-05-02
Estimated Expiration
Not applicable · inactive patent

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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.
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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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