Power Supply Control Device Voltage Verification
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Solution Overview
Problem
Existing power supply control technologies risk battery depletion or voltage decrease when the power source management unit fails, particularly in battery-powered systems, as they lack a simple configuration to maintain power supply within acceptable ranges without a management unit.
Innovation Solution
A power supply control device with a switch circuit, voltage detection unit, current detection unit, storage unit, and control unit that determines whether to turn on or off the power supply based on the power source voltage and load current values, using a map to define safe operating regions to prevent battery voltage from dropping below acceptable levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power source management unit is used to control power supply to loads, then power supply control capability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the essential power supply control function from the complex power source management unit and implements it directly in the control unit using voltage and current detection. This removes the need for a separate power source management unit while maintaining the core control capability, thereby reducing device complexity without sacrificing reliability.
2Reliability
If a power source management unit is used to detect total current value, then power supply monitoring is improved, but device complexity increases
Solution Approach 1:
The patent merges the voltage detection unit, current detection unit, and control unit into a single integrated control system. The control unit directly uses the detection results from the voltage detection unit and current detection unit to determine whether to supply power, eliminating the need for a separate power source management unit and reducing overall device complexity while maintaining monitoring capability.
3Ease of operation
If the switch circuit is turned on without voltage verification, then ease of operation is improved, but reliability deteriorates
Solution Approach 1:
The patent implements preliminary voltage verification before allowing the switch circuit to be turned on. The control unit determines whether the power source voltage value will decrease to or below an acceptable voltage value before enabling the switch, preventing battery depletion from occurring in the first place. This preliminary check ensures reliability while maintaining ease of operation through automatic control.
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 power supply to be maintained within acceptable ranges using a simple configuration, preventing battery depletion and ensuring reliable operation, such as preventing engine shutdown in vehicle batteries.
Implementation Method 1
a voltage detection unit configured to detect a power source voltage value of the power source
Implementation Method 2
a current detection unit configured to detect the load current
Data Source
AI summary
A power supply control device includes a control unit that executes determination processing that, when an operation instruction is received from a switch input detection unit, determines, in a case in which the switch circuit is turned on, whether or not a power source voltage value will decrease to or below an acceptable voltage value on the basis of a power source voltage value obtained from a voltage detection unit and a load current value stored in a storage unit in advance; and in the determination processing, executes switch control processing which allows the switch circuit to be turned on if the power source voltage value is determined to not decrease to or below the acceptable voltage value and does not allow the switch circuit to be turned on if the power source voltage value is determined to decrease to or below the acceptable voltage value.