Vehicle Seat Power Supply with Battery Backup for Load Management
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Solution Overview
Problem
Existing power supply devices for vehicle seats often face insufficient power when multiple loads need to be driven simultaneously, as they rely solely on contactless power transmission which may not meet the combined power requirements.
Innovation Solution
A power supply device for vehicle seats that includes a power receiving unit, a power transmitting unit, and a power storage unit, with a switching unit to manage charging and discharging based on load power and supply power, ensuring efficient power distribution and preventing overdischarge, and a control unit to prioritize load driving based on power availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If contactless power transmission is used to supply power to multiple loads, then power supply convenience is improved, but power supply capacity becomes insufficient
Solution Approach 1:
The power storage unit (battery) is charged in advance through contactless power transmission when power demand is low, storing energy for later use when multiple loads need to operate simultaneously. This preliminary energy accumulation resolves the contradiction by preparing power capacity beforehand without requiring a permanently oversized power transmission system.
Solution Approach 2:
The system dynamically changes the power supply mode between contactless transmission and battery discharge based on power demand conditions. When power demand exceeds transmission capacity, the battery transitions from charged state to discharging state, providing additional power and resolving the capacity limitation while maintaining contactless operation convenience.
2Adaptability or versatility
If power is supplied to multiple loads simultaneously, then load functionality is improved, but power consumption increases
Solution Approach 1:
The power supply system dynamically adjusts between contactless power transmission and battery discharge based on real-time power demand. The control unit monitors power consumption levels and automatically switches power sources, enabling full load functionality when needed while managing overall energy consumption through intelligent source selection.
3Power
If battery capacity is increased to supply power to multiple loads, then power supply capacity is improved, but device complexity increases
Solution Approach 1:
Instead of using a large-capacity battery that would be complex and expensive, the system uses a smaller battery that is charged in advance through contactless power transmission. This preliminary charging approach allows the battery to provide high power output temporarily without requiring permanently large capacity, thus reducing device complexity while maintaining adequate power supply capability.
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 reliable and efficient power supply to multiple loads in a vehicle seat by utilizing a power storage unit to supplement power transmission, ensuring that all loads can be driven simultaneously without overloading the system and preventing battery overdischarge.
Implementation Method 1
a power receiving coil provided in the vehicle seat, and a power supply coil provided in the floor portion of the vehicle body
Data Source
AI summary
A power supply device for a vehicle seat, including: a power receiving unit that is provided in a vehicle seat and is connected to a plurality of loads in the vehicle seat; a power transmitting unit that contactlessly transmits power to the power receiving unit; and a power storage unit that is provided in the vehicle seat, is connected to the loads, and is charged via a power supply path formed by the power receiving unit and the power transmitting unit.