a DC power supply

A DC power supply and power supply technology, applied in electrical components, converting DC power input to DC power output, adjusting electrical variables, etc. High flexibility, strong structural scalability, and the effect of optimizing the current sharing characteristics
CN109980956BActive Publication Date: 2020-06-09南京君海数能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
南京君海数能科技有限公司
Publication Date
2020-06-09

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Abstract

The embodiment of the invention provides a DC power supply including a rectifier circuit and a DC power conversion circuit. The input end of the rectifier circuit is connected to a first power source / load, and the output end of the rectifier circuit is used as a DC bus to be connected to the input end of the DC power conversion circuit such that the rectifier circuit realizes AC / DC bidirectional electric energy conversion. The DC power conversion circuit realizes the DC / DC bidirectional electric energy conversion, and includes multiple bridge arm modules and a plurality of substrates. Each switching device in each bridge arm module is turned on or off based on a corresponding driving signal. The two ends of each bridge arm module are connected to the DC bus. The output end of each bridge arm module is connected with a second power source / load. The bridge arm modules having output ends connected in parallel are integrated into the same substrate. The DC power supply provided by the embodiment of the invention can be improved in the flexible expansibility of the DC power supply capacity while ensuring a good current sharing characteristic between the parallel bridge arm modules by adjusting the number of parallel bridge arm modules.
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Description

technical field

[0001] Embodiments of the present invention relate to the technical field of power electronics, and in particular, to a DC power supply. Background technique

[0002] With the popularization and promotion of the concept of new energy, new energy equipment such as mobile terminals, electric vehicles, and energy storage power stations are constantly being introduced. As an important part of new energy, the power battery is a key factor in determining the portability, battery life and energy storage capacity of new energy equipment, and its electrical characteristics play a vital role in new energy equipment.

[0003] In order to ensure the reliable operation of the power battery, it is necessary to conduct comprehensive and effective tests on the power battery cells. First of all, the test power supply of the power battery cell must have the characteristics of low voltage and high current. Secondly, for cells with different capacities, the test power supply n...

Claims

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