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Battery cluster and control method thereof

A control method and technology of battery clusters, applied in the field of battery clusters, can solve the problems of limited adjustment range of DC/DC converters, lower charging and discharging capacity due to wooden barrel effect, and inability to realize power optimization of battery clusters, so as to improve system reliability , Improve efficiency, optimize management effect

Pending Publication Date: 2022-05-13
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] In actual work, when one or more packs in the battery cluster are abnormal and the system removes the corresponding pack, the voltage of the battery cluster connected to the DC bus will decrease. At this time, the adjustment range of the DC / DC converter inside the pack is limited. As a result, the system cannot work or the charging and discharging capacity is reduced due to the barrel effect, and the system cannot realize the power optimization of the entire battery cluster

Method used

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  • Battery cluster and control method thereof
  • Battery cluster and control method thereof
  • Battery cluster and control method thereof

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Embodiment Construction

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0056]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 inhere...

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Abstract

The invention provides a battery cluster and a control method thereof, and the battery cluster comprises a plurality of battery packs and a first DC / DC power optimizer. The output ends of the battery packs are cascaded and then are connected in series with the first DC / DC power optimizer; the first DC / DC power optimizer is used for outputting a negative polarity voltage when the output voltage after the output ends of the battery packs are cascaded is smaller than a first preset voltage; when the output voltage after the output ends of the battery packs are cascaded is greater than a second preset voltage, the first DC / DC power optimizer outputs a positive polarity voltage; therefore, optimal management of the whole battery cluster is realized, the efficiency is improved, the system cost is low, and the system reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of battery clusters, and more specifically relates to a battery cluster and a control method thereof. Background technique [0002] In existing energy storage systems, such as figure 1 As shown in the figure, each battery pack packs the battery cell and the DC / DC converter in series to realize power optimization of each pack, and part of the charge and discharge power of the pack flows through the DC / DC converter to improve efficiency. For the whole battery cluster, the output voltage of each pack connected in series is basically the same. Considering the cost of the DC / DC converter here, the voltage adjustment range is relatively narrow. [0003] In actual work, when one or more packs in the battery cluster are abnormal and the system removes the corresponding pack, the voltage of the battery cluster connected to the DC bus will decrease. At this time, the adjustment range of the DC / DC converter inside the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M50/509
CPCH02J7/0013H02J7/0036H02J7/007H02J7/00712H02J7/007182H01M50/509H02J2207/20
Inventor 林磊明陈鹏
Owner SUNGROW POWER SUPPLY CO LTD
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