Current limiting circuit and energy storage system
A current-limiting circuit and energy storage system technology, applied in the field of energy storage, can solve the problems of poor safety of the energy storage system, and achieve the effect of improving the safety of use and reducing the instantaneous impact current
Pending Publication Date: 2021-06-01
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0004] Based on this, it is necessary to address the problem of poor safety in the use of traditional energy storage systems, and provide a current-limiting circuit and energy storage system that can reduce the instantaneous inrush current when switching from off-grid to grid-connected, so as to improve the use safety of the energy storage system
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[0031] 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. Embodiments of the application are given in the 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 disclosure of this application more thorough and comprehensive.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.
[0033] It can be understood that the terms "first", "second" and the like used in this application may be...
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The invention relates to a current limiting circuit and an energy storage system. The current limiting circuit comprises a first detection unit, a second detection unit, a processor, a first switching circuit and a current limiting unit; the first detection unit is connected with the energy storage circuit, and the second detection unit is connected with the power grid; the processor is connected with the first detection unit, the second detection unit and the first switching circuit; the first switching circuit is connected with the first output end of the energy storage circuit and the first end of the power grid; the current limiting unit is connected with the first output end of the energy storage circuit and the first end of the power grid; The first detection unit is used for collecting a first voltage output by the energy storage circuit; and the second detection unit is used for collecting second voltage output by the power grid. The processor is used for acquiring the first voltage and the second voltage, and outputting a control signal to control the first switching circuit to be switched off when the first voltage is smaller than the second voltage, so that the instantaneous impact current in the off-grid and grid-connected switching state can be reduced, and the use safety of the energy storage system is improved.
Description
technical field [0001] The present application relates to the technical field of energy storage, in particular to a current limiting circuit and an energy storage system. Background technique [0002] The off-grid function of the energy storage system enables the energy storage system to realize the AC-DC switching between the energy storage power supply and the grid, achieving the effect of "permanent power failure". Among them, grid connection refers to the connection of power consumption or power generation equipment to the grid, absorbing grid power or generating power to the grid. Off-grid means that the power consumption or power generation equipment is not connected to the grid, and the power is provided by the energy storage power supply. [0003] When the traditional energy storage system is switched from grid to grid, due to the connection of the grid, a large instantaneous inrush current will be formed between the energy storage power supply and the grid, which w...
Claims
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IPC IPC(8): H02J3/38H02J3/32H02M3/156H02H9/02
CPCH02H9/02H02J3/32H02J3/381H02M3/156
Inventor 曾云洪李伟进那科
Owner GREE ELECTRIC APPLIANCES INC