US 12,744,462 B2Granted

Flying capacitor converter, voltage converter and energy storage system with same

AssigneeDelta Electronics, Inc.

InventorsBo Feng, Tengshen Zhang, Linfeng Zhong, Yafeng Wang

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Abstract

A flying capacitor converter, a voltage converter and an energy storage system are provided. The flying capacitor converter includes a high-voltage side, a low-voltage side, a power switch unit, a current switch unit and a current detection unit. The high-voltage side is electrically connected with a first power source. The low-voltage side is electrically connected with a second power source. The power switch unit is electrically connected between the high-voltage side and the low-voltage side and includes three terminals and four power switches. The current switch unit is electrically connected with the high-voltage side, the low-voltage side and/or a common node. The current detection unit is electrically connected between a third terminal of the power switch unit and the common node. If the current detected by the current detection unit indicates that a short-circuit condition occurs, the power switch unit is disconnected from the high-voltage side and/or the low-voltage side.

Claims20

Dependent claims

A flying capacitor converter electrically connected between a first power source and a second power source, the flying capacitor converter comprising:

a high-voltage side electrically connected with the first power source, and comprising a high-voltage positive terminal and a high-voltage negative terminal;
a low-voltage side electrically connected with the second power source, and comprising a low-voltage positive terminal and a low-voltage negative terminal;
a common node arranged between the low-voltage negative terminal of the low-voltage side and the high-voltage negative terminal of the high-voltage side;
a power switch unit electrically connected between the high-voltage side and the low-voltage side, and comprising a first terminal, a second terminal, a third terminal, a first power switch, a second power switch, a third power switch and a fourth power switch, wherein the first power switch, the second power switch, the third power switch and the fourth power switch are serially connected between the first terminal and the third terminal of the power switch unit;
at least one current switch unit electrically connected with the high-voltage side, the low-voltage side and/or the common node;
a current detection unit electrically connected between the third terminal of the power switch unit and the common node and configured to detect a current condition of the flying capacitor converter;
and
a controller electrically connected with the current detection unit and the at least one current switch unit and configured to control operations of the at least one current switch unit based on the current condition detected.

5 more elements

A voltage converter, comprising:

a high-voltage side and a low-voltage side electrically connected with a common node;
a power switch unit electrically connected among the high-voltage side, the low-voltage side and the common node;
a current switch unit electrically connected between the power switch unit and the common node;
at least one current detection unit disposed in at least one power loop of the voltage converter and configured to detect at least one current condition of the voltage converter;
and
a controller electrically connected with the at least one current detection unit and the current switch unit and configured to control an operation of the current switch unit based on the at least one current condition detected.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/770,645Filed 11 Jul 2024
Priority: CN 202310861202.413 Jul 2023
Published: US 2025/0023472 A116 Jan 2025
Granted: 22 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H02H 7/1213
For static converters or rectifiers: for DC-DC converters
H02M 1/0009
Details of control, feedback or regulation circuits: devices or circuits for detecting current in a converter
H02M 3/07
Using resistors or capacitors, e.g. potential divider: using capacitors charged and discharged alternately by semiconductor devices with control…