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How to control the power supply of two power supplies.

Hardware design
March 15, 2021 by Aurelius 82

An existing application scenario is this: the power supply system of the device is composed of an external DC power supply DC60V and a backup battery pack. When the external DC60V is normal, the external DC60V will supply power to the device and charge the battery pack at the same time. When the external DC60V is abnormal, it is powered by the battery pack. The working current of the system is about DC80A.

How do I control the switching between external DC60V and battery pack power supply modes? Limited to volume requirements, no contactor control is considered. Please recommend other control switching solutions? For example, using MOS to control on and off, how to achieve it? How to control MOS with several MOS?

All Comments

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Kennan Posted on March 15, 2021

Refer to the UPS power supply information.

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Phyllis Posted on March 15, 2021

Using the online UPS power solution, the rectified AC power directly floats the battery. When the mains is not available, the battery automatically supplies power. It should be possible without any difficulty.

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Daley Posted on March 15, 2021

Use a mcu to detect, add a diode to the output, and soft turn off.

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