Backup Power Supply Paths for Mixed-Voltage Load Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing boost power supply circuits for lithium ion batteries have a large size and high cost due to the need to collectively boost and output voltage to various loads with different minimum guaranteed voltages, increasing the voltage and current processing within the circuit.
Innovation Solution
A back-up power supply system that includes a voltage conversion circuit configured to convert the output voltage of an electric storage device, where power is supplied directly to a first load without the circuit and via the circuit to a second load, reducing the size and cost of the voltage conversion circuit by only converting voltage for the second load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the boost power supply circuit collectively boosts and outputs voltage to all loads according to the highest minimum guaranteed voltage, then all loads receive sufficient voltage, but the voltage conversion circuit becomes large in size and high in cost
Solution Approach 1:
The patent segments the power supply system into multiple paths: a first power supply path for loads requiring high voltage (with boost conversion) and a second power supply path for loads that can tolerate lower voltage (without boost conversion). This segmentation allows the boost power supply circuit to serve only specific loads rather than all loads collectively, reducing the circuit's size and cost while maintaining reliability for critical loads.
Solution Approach 2:
The patent applies local quality by providing different power supply qualities to different loads based on their specific requirements. Critical loads receive boosted voltage through the first power supply path, while non-critical loads receive direct battery voltage through the second path. This localized approach optimizes the overall system by applying voltage conversion only where necessary.
2Reliability
If the boost power supply circuit processes high voltage and current to meet the highest minimum guaranteed voltage requirement, then all loads operate reliably, but the circuit requires larger components and higher cost
Solution Approach 1:
The power supply system is divided into two separate power supply paths: a first path with boost conversion for loads requiring high voltage, and a second path without boost conversion for loads that can operate at lower voltage. This segmentation reduces the manufacturing cost by limiting the boost circuit's role to only the necessary loads, avoiding the need to design for the highest voltage requirement across all loads.
Solution Approach 2:
The patent changes the voltage parameter dynamically by switching between two power supply modes: boosted voltage mode for critical loads and direct battery voltage mode for non-critical loads. This parameter change approach allows the system to meet reliability requirements for essential loads while reducing overall system cost.
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 configuration reduces the size and cost of the voltage conversion circuit by performing voltage conversion only for specific loads, ensuring continuous power supply to both loads while maintaining the minimum guaranteed voltage for the second load even when the battery voltage drops.
Implementation Method 1
a voltage conversion circuit configured to convert an output voltage of the electric storage device
Data Source
AI summary
A back-up power supply system (1) is configured to supply electric power from an electric storage device (5) to loads (3) when a power supply (2) is defective. The back-up power supply system (1) includes a first voltage conversion circuit (6) configured to convert an output voltage of the electric storage device (5). The loads (3) include a first load (31) and a second load (32). The back-up power supply system (1) is configured to supply power from the electric storage device (5) to the first load (31) not via the voltage conversion circuit (6), and to supply electric power from the electric storage device (5) to the second load (32) via the voltage conversion circuit (6).