A kind of power supply method and device

Abstract

The invention discloses a power supply method. Whether the generation power of a hydrogen energy power source exceeds the rated power of the hydrogen energy power source is detected; if not, the hydrogen energy power source supplies power to electric equipment at the generation power; if yes, the hydrogen energy power source and a storage battery pack supply power to the electric equipment together; discharging voltage of the storage battery pack is detected and is decreased continuously at a preset voltage step value until the generation power of the hydrogen energy power source is equal to the rated power. The invention further discloses a power supply device. By means of the technical scheme, the power supply duration is increased, and the application range of the hydrogen energy power source is widened.

Description

technical field [0001] The invention relates to power supply technology, in particular to a power supply method and device. Background technique [0002] Usually, when the mains system is normal, the mains system supplies power to the electrical equipment; when the mains system fails, the backup power supply supplies power to the electrical equipment. At present, a valve-regulated lead-acid battery pack (abbreviated as a battery pack) can be selected as a backup power supply, or a portable hydrogen energy power supply can be selected as a backup power supply. [0003] When the battery pack is selected as the backup power supply, since the battery pack is a power storage device, its power supply duration is closely related to its own capacity and power consumption of electrical equipment, so the power supply duration is relatively short. [0004] When the hydrogen energy power supply is selected as the backup power supply, the hydrogen energy power supply is a power generati...

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Problems solved by technology

[0004] When the hydrogen energy power supply is selected as the backup power supply, the hydrogen energy power supply is a power generation device. In theory, it can continue to work by continuously adding fuel such as hydrogen; however, the power of the hydrogen energy power supply is rated, while the power of the electrical equipment is Unfixed, so that the hydrogen energy power supply can only supply power for electrical equipment whose power is less than its own rated power, and cannot supply power for electrical equipment whose power is greater than the rated power of the hydrogen energy power supply; when the power of the electrical equipment exceeds the hydrogen energy power supply When the rated power is high, it is easy to cause the hydrogen energy power supply to be overloaded and shut down, that is, the hydrogen energy power supply fails to supply power to the electrical equipment; the above characteristics of the hydrogen energy power supply virtually limit its application range

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