Active equalization circuit and method

A technology of active equalization and equalization of circuits, applied in the direction of charge equalization circuits, circuits, circuit devices, etc., can solve the problem of high cost, achieve the effect of reducing cost and increasing available power

Pending Publication Date: 2021-05-11
度普(苏州)新能源科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, an embodiment of the present invention provides an active equalization circuit and method to solve the problem of high cost of active equalization devices in the prior art

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  • Active equalization circuit and method

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047]In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comp...

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Abstract

The invention provides an active equalization circuit and method. The active equalization circuit comprises a single-chip microcomputer and N equalization circuits, and the single-chip microcomputer calculates and records the battery charge state of a battery cell in a battery module; in the discharging process of the battery module, if the battery charge state of the battery cell is detected to be zero percent, the equalization circuits are controlled to start a voltage reduction mode, and the battery module is controlled to supplement the electric quantity for the battery core with the battery charge state of zero percent; in the charging process of the battery module, if the battery charge state of the battery module is detected to be zero percent, the equalization circuit is controlled to start a boost mode, and the battery charge state of the battery module is controlled to be 100 percent to transfer the electric quantity into the battery module. According to the scheme, the battery charge states of the battery cells in the battery module are calculated, so the battery cells needing to be equalized are determined, the cost of an active equalization circuit device can be reduced, the available power of the battery module can be increased, and the cycle service life of the battery pack can be prolonged.

Description

technical field [0001] The invention relates to the field of new energy, in particular to an active equalization circuit and method. Background technique [0002] With the development of science and technology, batteries are used as energy storage devices in all aspects of life, such as new energy power generation, electric vehicles and industrial equipment. [0003] In order to reduce battery pollution, multiple recycled second-hand batteries are often used in series to form a battery module as an energy storage device. Due to the differences in the internal performance of the second-hand batteries in the battery module, there is a bucket effect when the second-hand batteries are connected in series to form a battery module. It is easy to cause capacity imbalance among the individual cells in the battery module, so it is necessary to manage the capacity imbalance among the individual cells in the battery module. [0004] At present, battery balancing technology is often us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0016H02J7/0019H01M10/441Y02E60/10
Inventor 余韬文青武刘鑫
Owner 度普(苏州)新能源科技有限公司
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