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Series-parallel switching circuit control method and device, controller and storage medium

A circuit control and switching circuit technology, applied in circuit devices, battery circuit devices, output power conversion devices, etc., can solve problems such as normal charging and output power interruption.

Pending Publication Date: 2022-01-04
XIAN LINCHR NEW ENERGY TECH CO LTD
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Problems solved by technology

[0005] The object of the present invention is to provide a series-parallel switching circuit control method, device, controller and storage medium for the deficiencies in the above-mentioned prior art, so that online series-parallel switching can be realized without stopping the machine, and the output voltage can be guaranteed Or the output current is stable and controllable, which effectively solves the problem that the output power interruption in the prior art when switching between series and parallel leads to normal charging, and thus meets the normal charging needs of different loads

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  • Series-parallel switching circuit control method and device, controller and storage medium

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Embodiment Construction

[0083] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the appended The figures are only for the purpose of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented in accordance with some embodiments of the application. It should be understood that the operations of the flowcharts may be performed out of order, and steps that have no logical context may be performed in reverse order or concurrently. In addition, those skilled in the art may add one or more other operations t...

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Abstract

The invention provides a series-parallel switching circuit control method and device, a controller and a storage medium, and relates to the technical field of power electronics. The method comprises the following steps that: a pre-generated circuit control sequence diagram is acquired; the circuit control sequence diagram is used for indicating the state of the state switching unit at at least one moment and indicating the change state of the output current and the output voltage of the at least two direct current output units at at least one moment; and according to the circuit control sequence diagram, the state of the state switching unit and the output current and the output voltage of the at least two direct current output units are controlled, and the state of the discharging unit is controlled, so that the at least two direct current output units are switched from a parallel connection state to a series connection state or switched from the series connection state to the parallel connection state. According to the scheme, on-line series-parallel connection switching can be achieved without shutdown, the problem that normal charging cannot be achieved due to output power interruption during series-parallel connection switching in the prior art is solved, and the normal charging requirements of different loads are met.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular, to a control method, device, controller and storage medium for a series-parallel switching circuit. Background technique [0002] The series-parallel switching circuit uses switches or contactors to connect two independent DC output modules in series or in parallel. Based on this series-parallel switching circuit, the charging system can be expanded to meet the charging power requirements of different loads. [0003] At present, DC output series-parallel switching involves switching between two or more outputs. When switching from series to parallel, the output voltages of at least two DC output units are respectively turned off, but due to the existence of output capacitors, the output voltage does not It will be directly reduced to zero, and the residual voltage cannot be guaranteed to be absolutely equal, and at the moment of switching to parallel connection,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02J7/00
CPCH02M3/33569H02J7/00H02J2207/20
Inventor 范杨平吕剑孙利辉周强袁庆民
Owner XIAN LINCHR NEW ENERGY TECH CO LTD
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