Battery Module Mode Switching for Low-Loss Power Supply
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Solution Overview
Problem
In power devices with multiple battery modules, such as outdoor cabinets or communication base stations, the power consumption by components like power switching transistors and DC/DC converters reduces overall energy utilization during charging and discharging, necessitating a solution to enhance energy efficiency.
Innovation Solution
A power supply management system that dynamically adjusts the operational mode of battery modules based on load power, charge/discharge rates, and health states, allowing modules with low rates to enter sleep or deep sleep modes to reduce energy consumption and improve conversion efficiency, while ensuring reliable power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all battery modules operate in working mode to ensure sufficient power supply capacity, then power supply reliability is improved, but energy consumption increases due to power loss in power consumption components
Solution Approach 1:
The patent implements dynamic mode switching for battery modules, allowing them to transition between working mode, sleep mode, and deep sleep mode based on real-time system power requirements. This dynamic adjustment optimizes energy efficiency by minimizing the number of active modules while maintaining adequate power supply capacity
Solution Approach 2:
The system changes operational parameters by adjusting the charge/discharge rates of battery modules to maintain them within an optimal range (0.05C-0.3C), thereby improving conversion efficiency. Additionally, modules switch between different operational modes (working, sleep, deep sleep) based on system needs
2Duration of action of stationary object
If battery modules operate at low charge/discharge rates to extend battery life, then battery durability is improved, but conversion efficiency of DC/DC converters deteriorates
Solution Approach 1:
The system actively monitors and adjusts charge/discharge rates to maintain them within the optimal range of 0.05C-0.3C. This parameter optimization ensures both extended battery lifespan and maintained conversion efficiency of DC/DC converters
Solution Approach 2:
The monitoring module continuously detects charge/discharge rates of battery modules and provides feedback to the control module, which then adjusts the operational state of modules to maintain rates within the optimal efficiency range
3Power
If a fixed quantity of battery modules is deployed to meet peak power demands, then power supply capacity is improved, but energy utilization deteriorates during low-demand periods
Solution Approach 1:
The system dynamically adjusts the number of actively discharging battery modules based on real-time power demand. During low-demand periods, fewer modules operate in working mode while others remain in sleep or deep sleep mode, optimizing energy utilization while maintaining adequate power supply capacity when needed
Solution Approach 2:
The battery system is divided into multiple independent modules that can be individually controlled. This segmentation allows the system to activate only the necessary number of modules based on current power requirements, improving overall energy efficiency
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
The system enhances energy utilization and conversion efficiency by optimizing the operational state of battery modules, reducing unnecessary power consumption and maintaining reliable power delivery.
Implementation Method 1
a direct current/direct current converter, and is configured to: control the direct current/direct current converter to convert a direct current output by the at least one battery pack into a direct current at a specified voltage
Data Source
AI summary
A power supply management system includes a monitoring module and a plurality of battery modules. The battery module includes a BMS, a DC/DC converter, and a plurality of battery packs. When the battery packs of the plurality of battery modules are charged or discharged by using the DC/DC converter, the monitoring module may detect charge/discharge rates of the battery modules, and when the charge/discharge rates of the battery modules are less than a specified threshold, control a part of battery modules that are being charged or discharged to stop being charged or discharged. After a quantity of battery modules that are being charged or discharged is decreased, the charge/discharge rates are increased.