Battery Voltage Control via Segmented Switching Units
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Solution Overview
Problem
Renewable energy sources exhibit power variability due to factors like solar power changes with time of day or cloud cover, necessitating a system to stabilize output power for efficient energy transmission.
Innovation Solution
A power control system incorporating a rechargeable battery with multiple units and a control unit that generates switch control signals to maintain voltage within a predetermined range, allowing for separate or combined operation of battery units, and includes a switching unit and DC link capacitors to manage charge and discharge operations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single rechargeable battery is used to stabilize power output, then the system structure is simple, but the voltage control precision and stability are insufficient under varying load conditions
Solution Approach 1:
The rechargeable battery is divided into multiple battery units (first battery unit, second battery unit, etc.) that can be independently controlled. Each battery unit has its own switching unit and control circuitry, allowing separate charge/discharge operations. This segmentation enables finer voltage control precision while maintaining overall system stability, resolving the contradiction between simple structure and precise control.
2Reliability
If multiple battery units are operated together to improve voltage stability, then the voltage control precision improves, but the device complexity increases
Solution Approach 1:
The system dynamically switches between different operational modes: single battery unit operation, multiple battery units operating together, or combinations thereof. The control unit selectively activates or deactivates specific battery units and their associated switching units based on real-time voltage requirements and load conditions. This dynamic operation allows the system to achieve high voltage stability when needed while maintaining structural simplicity during normal operation.
Solution Approach 2:
Each battery unit is designed with universal functionality, including its own switching unit, control circuitry, and protection mechanisms. This modular universal design allows any battery unit to independently perform charge/discharge operations, enabling flexible combinations of multiple units to work together. The multi-functionality of each unit simplifies the overall control architecture while achieving enhanced voltage stability through coordinated operation.
3Adaptability or versatility
If switching units with multiple switches are used to control each battery unit, then the voltage control flexibility improves, but the device complexity and potential failure points increase
Solution Approach 1:
The switching unit is segmented into multiple independent switches (first switch, second switch, third switch, etc.), each controlling a specific battery unit or connection point. This segmentation allows the control unit to selectively activate only the necessary switches for the current operational mode, reducing the effective complexity while maintaining full control flexibility. Each switch can be independently controlled, enabling versatile voltage regulation strategies.
Solution Approach 2:
The control unit continuously monitors the voltage output and the operational state of each switch and battery unit. Based on this feedback, the control unit dynamically adjusts which switches are activated and in what configuration. This feedback mechanism allows the system to achieve high voltage control flexibility while managing switching complexity through intelligent, adaptive control rather than requiring all switches to be simultaneously managed.
4Productivity
If separate operation of battery units is implemented to improve control precision, then the energy management efficiency improves, but the system complexity increases
Solution Approach 1:
The control system is segmented into independent control circuits for each battery unit, with each control circuit managing the charge/discharge operations of its associated battery unit. This segmentation enables parallel energy management, where multiple battery units can be independently optimized simultaneously, improving overall energy management efficiency. The modular control architecture manages complexity through standardization and independence of control modules.
Solution Approach 2:
The control unit pre-configures the operational states of different battery units based on predicted or anticipated energy requirements. By preparing the system in advance with pre-charged or pre-discharged battery units, the system can quickly respond to changing load conditions without requiring complex real-time decision-making, thereby improving energy management efficiency while keeping the control logic relatively simple.
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 effectively stabilizes voltage and improves energy efficiency by controlling the charge and discharge operations of the battery units, ensuring consistent power delivery and reducing energy wastage.
Implementation Method 1
a rechargeable battery, the rechargeable battery including a first battery unit and including a second battery unit connected to a first terminal of the first battery unit at a first node
Implementation Method 2
a first link unit, the first link unit being connected to the first switch and the second switch. The first link unit may be a DC link capacitor
Data Source
AI summary
A power control system includes a rechargeable battery, the rechargeable battery including a first battery unit and including a second battery unit connected to a first terminal of the first battery unit at a first node, a switching unit, the switching unit including a first switch connected to a second terminal of the first battery unit and including a second switch connected to the first node, and a control unit, the control unit being configured to generate and transmit switch control signals respectively corresponding to the first switch and the second switch, and being configured to control a voltage of the rechargeable battery such that the voltage is maintained in a threshold range of a predetermined rated voltage.