Composite power supply method and device

Abstract

The embodiment of the invention provides a composite power supply method and a device. The composite power supply device comprises an iron lithium cell power supply module, a lead-acid cell power supply module and a power supply control module. The iron lithium cell power supply module is used for providing power for a load under the control of the power supply control module. The lead-acid cell power supply module is used for providing power for the load under the control of the power supply control module. The power supply control module is used for controlling the iron lithium cell power supply module to provide power for the load or controlling the iron lithium cell power supply module and the lead-acid cell power supply module to be connected in parallel to provide power for the load according to a power supply scene. According to the technical scheme, excellent properties of the iron lithium cell power supply module and the lead-acid cell power supply module can be fully used according to the power supply scene, performance deficiencies of the iron lithium cell power supply module and the lead-acid cell power supply module can be avoided, and therefore power supply efficiency of a power unit is improved, and cost is reduced.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a composite power supply method and device. Background technique [0002] For regions or countries with unstable power supply, the demand for battery energy storage is increasing. At present, batteries mainly include large-capacity batteries represented by lead-acid batteries and high-cycle batteries represented by iron-lithium batteries. [0003] The main characteristics of lead-acid batteries are large capacity and low price, but their short cycle life is their main disadvantage. At present, the application of lead-acid batteries is relatively mature, and they are widely used in some fields that do not require high battery weight and volume, such as Communications, Uninterruptible Power Supply (UPS for short), and hybrid vehicles; the advantages of iron-lithium batteries are excellent cycle performance, small size, and light weight. The disadvantage is tha...

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Problems solved by technology

[0003] The main characteristics of lead-acid batteries are large capacity and low price, but their short cycle life is their main disadvantage. At present, the application of lead-acid batteries is relatively mature, and they are widely used in some fields that do not require high battery weight and volume, such as Communications, Uninterruptible Power Supply (UPS for short) and hybrid vehicles and other fields; the advantages of iron-lithium batteries are excellent cycle performance, small size, and light weight. The disadvantage is that the current price is relatively high

[0004] For some industries, such as the communication field, in order to ensure the reliability of the power supply of the site, the longest battery backup time is generally 10 to 12 hours. If lead-acid batteries are used, due to poor cycle performance, the batteries need to be replaced frequently; and If iron-lithium batteries are used, the price is more expensive

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