Vehicle Power Supply Backup for Depleted Battery Activation
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Solution Overview
Problem
Conventional vehicle-mounted power supply apparatuses fail to activate a vehicle when the vehicle battery runs out of power, requiring immediate replacement and disrupting operation.
Innovation Solution
A vehicle-mounted power supply apparatus with a backup power supply system that includes a contactless power receiver and discharger, which charges a power storage unit when the vehicle battery voltage falls below a threshold, allowing the controller to activate and reconnect relays to enable power distribution from a high voltage battery to the vehicle battery, thereby restarting the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle battery is used to supply activation voltage to the electrical junction box, then the relays can be controlled to distribute power from the high voltage battery, but when the vehicle battery runs out of power, the vehicle cannot be activated and requires immediate replacement
Solution Approach 1:
The backup power supply is charged in advance during normal operation when the vehicle battery voltage is sufficient. This preliminary charging action ensures that when the vehicle battery runs out of power, the backup power supply already has stored energy ready to immediately activate the electrical junction box and relays, enabling continuous operation without vehicle replacement
Solution Approach 2:
The backup power supply acts as an intermediary power source between the vehicle battery and the electrical junction box. When the vehicle battery voltage drops below the threshold, the backup power supply automatically activates and provides the necessary activation voltage to the electrical junction box, mediating the power supply gap and ensuring uninterrupted vehicle operation
2Productivity
If a backup power supply is added to enable operation when the vehicle battery is depleted, then operation continuity is improved, but the device complexity increases due to additional components
Solution Approach 1:
The backup power supply is integrated with the existing electrical junction box and power management system. The control unit that already manages the vehicle battery also controls the backup power supply activation, and the relays in the electrical junction box serve dual purposes for both normal and backup power distribution, reducing overall system complexity despite adding backup functionality
Solution Approach 2:
The electrical junction box and relays are designed to handle both normal vehicle battery power and backup power supply operations. The control unit performs multiple functions including monitoring vehicle battery voltage, activating the backup power supply when needed, and managing power distribution from either source, making the system multi-functional without proportionally increasing complexity
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 easy activation of a vehicle even when the vehicle battery is depleted, eliminating the need for immediate replacement and ensuring continuous operation by temporarily supplying power through contactless charging, allowing the vehicle to start and run using the high voltage battery.
Implementation Method 1
a contactless power receiver, being connected to a charging path of the power storage and being capable of contactlessly receiving electric power
Implementation Method 2
a backup power supply including a power storage, a contactless power receiver, and a discharger
Data Source
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AI summary
When the output voltage of a vehicle battery is lower than a lower limit value of an activation voltage, a power storage is charged with electric power supplied from the outside to a contactless power receiver, and thus the electric power stored in the power storage is supplied to a controller via a discharger to enable the controller to be activated. After the controller is activated, the controller causes a battery relay to be connected using the electric power supplied from the power storage via the discharger. Electric power is supplied from a high voltage battery to the vehicle battery to enable the vehicle battery to output a voltage higher than or equal to the lower limit value and enable a plurality of relays to be connected.