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A sine wave high-frequency chain three-level lithium battery inverter capable of energy feedback

An energy feedback, inverter device technology, applied in the direction of high-efficiency power electronic conversion, output power conversion device, electrical components, etc. The effect of machine weight

Active Publication Date: 2021-08-13
NANJING LEGENDALE ENERGY STORAGE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Lithium battery inverters used in the market generally use power frequency transformers as the intermediate link of energy conversion. This solution is easy to control, but has low efficiency and heavy weight.

Method used

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  • A sine wave high-frequency chain three-level lithium battery inverter capable of energy feedback
  • A sine wave high-frequency chain three-level lithium battery inverter capable of energy feedback
  • A sine wave high-frequency chain three-level lithium battery inverter capable of energy feedback

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Embodiment Construction

[0043] 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, but not all of 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.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingl...

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Abstract

The patent of the present invention relates to a sine wave high-frequency chain three-level lithium battery inverter device capable of realizing energy feedback, which includes: a lithium battery; Device electrical connection; secondary side active rectifier device; active clamping circuit, control circuit. The voltage output by the lithium battery is inverted and converted into a square-wave alternating current carrying sine wave information through the front-end inverter, and the high-frequency transformer is used to boost the voltage, and the alternating current carrying sine wave information is converted through the secondary-side active rectifier device Select different winding voltages (three levels) for demodulation and extraction according to the phase, and then filter through inductance and capacitance to convert it into alternating current in the form of a sine wave. The focus of this patent is to adopt a high-frequency chain and multi-level solution. The important intermediate energy conversion link uses a high-frequency transformer and a multi-level circuit, which reduces harmonics and reactive current; this patented control scheme not only reduces The weight of the whole machine is reduced, and the system efficiency is also improved.

Description

technical field [0001] The invention relates to an inverter power supply in the industrial field, in particular to a sine wave high-frequency chain three-level lithium battery inverter device capable of realizing energy feedback. Background technique [0002] With the improvement of the energy-to-weight ratio of lithium batteries, the application of lithium batteries as a mobile AC power source (lithium battery inverter) as an energy source is becoming more and more extensive. Compared with gasoline (diesel) generators, lithium battery inverters have the advantages of convenient movement, fast response to load changes, stable output voltage, no noise, no disturbance to the people, no pollution, good environmental performance and light weight. Lithium battery inverters will gradually replace generators and will become a better choice. [0003] Lithium battery inverters in the market generally use power frequency transformers as the intermediate link of energy conversion. Thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M7/483H02M7/219
CPCH02M3/33569H02M7/219H02M7/483Y02B70/10
Inventor 张广智
Owner NANJING LEGENDALE ENERGY STORAGE CO LTD
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