Current sharing method and device for energy storage equipment
An energy storage device and energy storage technology, applied in the direction of circuit devices, battery circuit devices, transportation and packaging, etc., can solve the problem of different remaining power, the inability of distributed energy storage devices, and the inability to ensure that the energy storage unit is fully charged or fully discharged and other issues to achieve the effect of ensuring stable operation
Pending Publication Date: 2022-08-09
杭州华塑科技股份有限公司
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Problems solved by technology
However, each energy storage unit is not completely consistent. For example, the remaining power of each energy storage unit may be different. The existing current sharing control cannot guarantee that each energy storage unit is fully charged or fully discharged at the same time when charging or discharging. As a result, distributed energy storage devices cannot exert their maximum performance
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[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0037]Hereinafter, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, unless otherwise specified,...
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The invention discloses a current sharing method and device for energy storage equipment, and relates to the technical field of power electronics. According to the specific scheme, the method comprises the steps of obtaining an energy storage parameter of each energy storage unit in multiple energy storage units, determining a target duration of each energy storage unit according to the energy storage parameter of each energy storage unit, determining a target energy storage unit according to the target duration of each energy storage unit, and then adjusting the current charging and discharging power of the target energy storage unit, and re-determining the target energy storage unit after each adjustment, and continuing to adjust the current charging and discharging power of the re-determined target energy storage unit until the current charging and discharging power of the plurality of energy storage units is the same. The energy storage equipment comprises a plurality of energy storage units. According to the invention, on the basis of ensuring stable operation of the energy storage equipment, each energy storage unit uniformly shares current, and each energy storage unit can be fully charged or discharged at the same time during charging or discharging, so that the maximum performance of the energy storage equipment is exerted.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a current sharing method and device for energy storage equipment. Background technique [0002] Distributed energy storage equipment is a large-capacity power system composed of several small-capacity energy storage units. Distributed energy storage equipment has the advantages of large capacity, high charging and discharging efficiency, high reliability, and strong scalability. [0003] In existing distributed energy storage devices, multiple energy storage units are often connected in parallel. By performing current sharing control on each energy storage unit, it can ensure that each energy storage unit shares the load current evenly, and improves the stability of the distributed energy storage equipment during operation. However, each energy storage unit is not completely consistent. For example, the remaining power of each energy storage unit may be different. The...
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CPCH02J7/0016H02J7/0068H02J7/0047H02J7/0048H02J7/005H02J7/007Y02E60/10
Inventor 杨冬强李明星何建林
Owner 杭州华塑科技股份有限公司