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Battery energy storage circuit and battery energy storage system

A battery energy storage and energy storage technology, applied in flexible AC transmission systems, electrical components, output power conversion devices, etc., can solve problems such as poor capacity expansion reliability, and achieve the effects of strong capacity expansion reliability, easy implementation, and large capacity.

Active Publication Date: 2021-10-08
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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  • Description
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Problems solved by technology

[0006] Based on this, it is necessary to provide a battery energy storage circuit and a battery energy storage system to solve the problem of poor reliability of the expansion of the traditional battery energy storage system

Method used

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  • Battery energy storage circuit and battery energy storage system
  • Battery energy storage circuit and battery energy storage system
  • Battery energy storage circuit and battery energy storage system

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Embodiment Construction

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0025] see figure 1, a battery energy storage circuit, comprising: a first phase cluster 100, including a plurality of first energy storage bridge arms 10 and second energy storage bridge arms 20 having the same number as the first energy storage bridge arms 10, each first energy storage bridge arm The first ends of the energy bridge arms 10 are connected to each other and the common end is used to connect the positive end of the DC power...

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Abstract

The invention relates to a battery energy storage circuit and a battery energy storage system. Through arranging a plurality of energy storage bridge arms which are connected in parallel in each phase cluster, the rated current which can be borne by the battery energy storage circuit can be increased, thereby ensuring that the battery energy storage circuit has enough large capacity under the condition that the rated voltage of the battery energy storage circuit is not changed. The above capacity expansion method is simple and easy to implement, direct series-parallel connection of a large number of energy storage devices (such as batteries) is avoided, the implementation difficulty is reduced, meanwhile, the number of the energy storage bridge arms in each phase cluster can be set at will, and redundancy can be achieved, so the capacity expansion method has high capacity expansion reliability.

Description

technical field [0001] The present application relates to the technical field of battery energy storage, in particular to a battery energy storage circuit and a battery energy storage system. Background technique [0002] At present, the main factors restricting the development of large-capacity battery energy storage systems are: one is the high cost of batteries; the other is the high cost of the battery management system (BMS); and the third is the limited capacity of the existing PCS (energy storage converter). As far as the current situation is concerned, the cost reduction of batteries and battery management systems is continuing. As a power conversion and access device, it is also possible to select a better and more suitable energy storage converter topology for large-capacity batteries. Energy storage systems provide a better solution. [0003] Currently, the topologies of energy storage converters used in large-capacity battery energy storage systems mainly includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02M7/483
CPCH02J3/32H02M7/483Y02E40/10
Inventor 彭鹏凌志斌陈满朱焕杰李毓烜陈堃
Owner SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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