Composite battery backup module and power supply method thereof

Abstract

The embodiment of the invention discloses a composite battery backup module and a power supply method thereof. The composite battery backup module comprises a slow discharge and energy storage unit, a quick discharge and energy storage unit and a charge unit. The power supply method of the composite battery backup module comprises the following steps of: detecting whether the system is powered off or not; if not, controlling the quick discharge and energy storage unit and the slow discharge and energy storage unit to simultaneously store electric power by the charge unit; and if so, controlling the quick discharge and energy storage unit and the slow discharge and energy storage unit to simultaneously discharge. In the invention, the use of a large-volume and high-cost charge unit is avoided by combining the quick discharge and energy storage unit and the slow discharge and energy storage unit, thereby the BBU (Building Baseband Unit) space is effectively saved, and the cost is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the field of storage technologies, and in particular to a composite battery backup module and a power supply method for the composite battery backup module. Background technique [0002] In a storage system, a battery backup unit (Battery Backup Unit, BBU for short) is usually used to protect data from power failure. When the system is powered off, there are generally two ways to protect system data. One is that the BBU directly supplies power to the system memory, enabling the memory to perform self-refresh to ensure that system data is not lost in the memory; the other is that the BBU backs up the data in the system memory to the hard disk to protect the data. [0003] Due to the limited energy storage of the BBU, when the system detects a power failure, it will turn off all devices and devices that can be turned off to save power consumption as much as possible. The time to turn off the correspond...

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Problems solved by technology

[0004] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art: Although the BBU is mainly used to supply power to the memory or back up memory data to the hard disk, the power output is relatively small, but at the moment when the system is powered off, Since most of the equipment has not been turned off, the power output of the BBU is quite large at this time, therefore, the current limiting requirements of the charging unit and the discharging unit in the BBU are very high

Because the higher the current limit, the larger the volume of the charging module and the discharging module, and the higher the cost, resulting in an increase in the space required by the BBU and an increase in the cost

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