SSD Power Supply Capacitor Module Voltage Charging
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Solution Overview
Problem
Conventional power supplies for solid state drive (SSD) systems require large storage capacitors to ensure data saving during power interruptions, leading to increased cost and board space, and have low efficiency due to the need for broad input voltage adaptation using buck-boost converters.
Innovation Solution
A power supply system comprising a bi-directional converter, a capacitor module, and a second converter module that charges capacitors to a high voltage during normal operation and discharges them to a lower voltage during power interruptions to supply loads, reducing the required capacitance and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large storage capacitors are used to ensure sufficient hold-up time for data saving during power interruptions, then the reliability is improved, but the area occupied on the circuit board and the cost increase
Solution Approach 1:
The patent changes the voltage parameter by charging capacitors to a high voltage (e.g., 12V or higher) during normal operation instead of standard operating voltage. This parameter change allows smaller capacitance values to store the same amount of energy (E=1/2CV²), thereby reducing the physical area occupied by capacitors while maintaining sufficient hold-up time for data saving during power interruptions
Solution Approach 2:
The patent applies preliminary action by charging the capacitor module to a high voltage state during normal operation before power interruption occurs. This preliminary energy storage ensures that when power is interrupted, the already-charged capacitors can immediately provide sufficient energy for data saving without requiring larger capacitance values
2Adaptability or versatility
If buck-boost converters are used to adapt to input voltage with a broad range, then the adaptability is improved, but the efficiency of the system decreases
Solution Approach 1:
The patent segments the power conversion function into two separate stages: first, a voltage conversion stage that charges the capacitor module to a high voltage level during normal operation; second, a hold-up stage where the charged capacitors directly supply energy during power interruption. This segmentation eliminates the need for complex buck-boost converters, reducing energy loss while maintaining adaptability to broad input voltage ranges through the first converter module
Solution Approach 2:
The patent performs preliminary voltage conversion and energy storage during normal operation by charging the capacitor module to a high voltage state. This preliminary action ensures that when power interruption occurs, the pre-charged capacitors can immediately supply energy without requiring real-time voltage conversion, thereby improving system efficiency while maintaining adaptability to various input voltages
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 solution allows for efficient energy storage in smaller capacitors, reducing the power supply's volume and cost while maintaining sufficient hold-up time for data saving during power outages, and enhances system efficiency by optimizing voltage conversion.
Implementation Method 1
a capacitor module (12), a first converter module (11) having a first terminal and a second terminal, wherein the first terminal is coupled to the input power terminal and the second terminal is coupled to the capacitor module
Data Source
AI summary
The present invention discloses a power supply. The power supply may comprise an input power terminal, a capacitor module, a first converter module and a second converter module. The first converter module may have a first terminal and a second terminal, wherein the first terminal is coupled to the input power terminal and the second terminal is coupled to the capacitor module. The second converter module may comprise an input and an output, wherein the input of the second converter module is coupled to the input power terminal, and the output of the second converter module is configured to supply a load.