UPS Voltage Converter Eliminates Heat During Battery Charging
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Solution Overview
Problem
Conventional uninterruptible power supply units experience significant power loss and heat generation during charging due to the need for voltage boosting, which prolongs charging time and affects reliability.
Innovation Solution
Incorporating a voltage converter that adjusts the external power supply voltage to match the difference between the battery's rated and charging voltage, allowing for simultaneous charging without the need for time-division control, thereby reducing power loss and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If voltage boosting is performed using an auxiliary power supply to charge the alkaline secondary battery, then the battery can be charged to a fully charged state, but significant power loss occurs and heat generation increases
Solution Approach 1:
The patent changes the voltage parameter strategy by using a higher-voltage external power supply (e.g., 100V) directly for charging the battery (rated voltage 54V), rather than using a 54V power supply and boosting it to higher voltage. This parameter change in the power supply voltage enables direct charging without voltage boosting, eliminating the power loss and heat generation associated with DC-DC conversion.
2Use of energy by moving object
If voltage boosting is performed using an auxiliary power supply, then the battery can be charged to a fully charged state, but heat generation increases affecting reliability
Solution Approach 1:
The patent changes the voltage parameter of the external power supply from matching the battery rated voltage (54V) to a higher voltage (100V). This parameter change eliminates the need for voltage boosting circuitry, thereby removing the heat generation source and improving system reliability.
3Loss of energy
If time-division charging control is used to reduce power converter size, then power loss and heat generation are reduced, but charging time increases
Solution Approach 1:
The patent changes the external power supply voltage parameter to a higher value (100V vs. 54V), which enables direct charging of the battery without requiring time-division control or voltage boosting. This single-step charging approach reduces both power loss and charging time compared to conventional time-division methods.
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
Enables faster charging of batteries to a fully charged state while minimizing heat generation and power loss, improving the overall efficiency and reliability of the uninterruptible power supply unit.
Implementation Method 1
a voltage converter that converts the voltage of the external power supply into a voltage corresponding to a difference between the rated voltage of the battery unit and a charging voltage of the battery unit
Implementation Method 2
a charging circuit that charges the battery unit with a voltage equal to the voltage of the external power supply added with the output voltage of the voltage converter
Data Source
AI summary
An uninterruptible power supply unit includes: an input/output terminal connected in parallel with a power supply line which supplies power from an external power supply to a load device; a battery unit whose rated voltage is a voltage equal to a voltage of the external power supply; a DC/DC converter for converting the voltage of the external power supply into an output voltage corresponding to a difference between the rated voltage of the battery unit and the charging voltage of the battery unit; a charging circuit for charging the battery unit with a voltage equal to the voltage of the external power supply added with the output voltage of the DC/DC converter; and a discharging circuit that discharges power to the load device from the battery unit through the input/output terminal in the event that the external power supply is interrupted.