DC Backup Power Topology for Longer Battery Service Life
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Solution Overview
Problem
In existing DC power supply systems for data centers, the energy storage battery is directly connected in parallel at the output side, leading to increased charging and discharging cycles, which reduces the battery's service life.
Innovation Solution
A DC backup power system is designed with a three-port module and an energy storage battery, where the energy storage battery is integrated into the rectifier power supply link, avoiding direct connection to the load. This configuration includes a rectifier unit with a filter, power factor correction circuit, and DCDC converter, along with a charging and discharging unit that manages the battery's charging and discharging based on the rectifier unit's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the energy storage battery is connected in parallel at the output side as a backup power supply, then the backup power supply function is achieved, but the number of charging and discharging cycles increases and service life is reduced
Solution Approach 1:
The patent introduces a control unit as an intermediary between the rectifier and the energy storage battery. This control unit manages the charging and discharging processes, preventing direct connection between the load and battery, thereby reducing unnecessary charging/discharging cycles while maintaining backup power functionality.
Solution Approach 2:
The system dynamically adjusts the operating state of the energy storage battery based on load conditions and rectifier output. The battery operates in different modes (charging, discharging, or standby) controlled by the control unit, optimizing its usage to extend service life while ensuring backup power availability.
2Reliability
If the energy storage battery is directly connected to the load in parallel, then the backup power supply function is achieved, but load changes cause frequent charging and discharging cycles
Solution Approach 1:
The control unit acts as an intermediary that decouples the direct connection between the load and energy storage battery. It intelligently controls when the battery charges or discharges based on system conditions, preventing frequent cycling caused by load fluctuations while maintaining reliable backup power supply.
Solution Approach 2:
The control unit monitors system parameters and provides feedback control to manage battery charging and discharging. This feedback mechanism prevents unnecessary cycling by making informed decisions based on real-time system state, reducing the number of charging/discharging cycles while ensuring backup power reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces the number of charging and discharging cycles of the energy storage battery, thereby extending its service life and minimizing the impact of load changes on battery operation. Additionally, it allows for a more stable output voltage, reducing the complexity and cost of downstream electrical equipment.
Implementation Method 1
the rectifier unit is configured to convert external alternating current into direct current to supply power to the load, charge the energy storage battery through the charging and discharging unit
Implementation Method 2
the rectifier unit comprises a filter, a power factor correction circuit and a DCDC converter which are connected in sequence
Implementation Method 3
the isolation transformer is configured to isolate the primary circuit and the secondary rectifier circuit
Implementation Method 4
the rectifier unit comprises a filter, a power factor correction circuit and a DCDC converter which are connected in sequence
Data Source
AI summary
A Direct Current (DC) backup power system is provided in the present disclosure, comprising a three-port module and an energy storage battery, wherein the three-port module comprises a rectifier unit and a charging and discharging unit, wherein the rectifier unit is connected to the charging and discharging unit, the charging and discharging unit is connected to the energy storage battery, and an output end of the rectifier unit is connected to a load; the rectifier unit comprises a DCDC converter; a first end of the energy storage battery is connected to a first output end of the DCDC converter, and a second end of the energy storage battery is connected to a second output end of the DCDC converter through the charging and discharging unit. The DC backup power system according to the embodiments of the present disclosure improve the service life of the energy storage battery.