Vehicle Lock Emergency Power Switching via Traction Battery
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Solution Overview
Problem
Existing motor vehicle locks in electric and hybrid vehicles require an additional emergency battery for operation during crashes or on-board battery failure, leading to increased costs, weight, and potential malfunctions.
Innovation Solution
Utilize the traction battery, typically used for vehicle propulsion, as an emergency battery to power the electromotive vehicle locks by implementing a switchover device that switches from on-board battery to traction battery during emergencies, ensuring electrical compatibility and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional emergency battery is implemented inside the motor vehicle door or lock housing, then the motor vehicle lock can be opened during emergency operation, but the costs and weight of the motor vehicle door and lock increase
Solution Approach 1:
The traction battery, originally designed solely for vehicle propulsion, is made to serve dual functions: primary vehicle propulsion and emergency door lock operation. The control unit enables the traction battery to automatically switch to powering the door lock electromotive drive during emergency situations, eliminating the need for a separate emergency battery in the door assembly.
Solution Approach 2:
The invention merges the emergency power supply function with the existing traction battery system. Instead of adding a separate emergency battery to the door or lock housing, the control unit integrates the emergency power function into the central battery management system, combining multiple functions into a single unified power architecture.
2Reliability
If an additional emergency battery is implemented inside the motor vehicle door or lock housing, then the motor vehicle lock can be opened during emergency operation, but the costs and weight of the motor vehicle lock increase
Solution Approach 1:
The traction battery, originally designed solely for vehicle propulsion, is made to serve dual functions: primary vehicle propulsion and emergency door lock operation. The control unit enables the traction battery to automatically switch to powering the door lock electromotive drive during emergency situations, eliminating the need for a separate emergency battery in the door assembly.
Solution Approach 2:
The emergency battery function is extracted from the door and lock assemblies and relocated to the central traction battery system. This extraction removes the weight burden from the door and lock components while centralizing the emergency power supply capability in the vehicle's main power architecture.
3Reliability
If a backup battery is implemented in the motor vehicle door, then the electric door lock can be opened during power supply malfunction, but the operating forces required to open the door increase
Solution Approach 1:
The traction battery, originally designed solely for vehicle propulsion, is made to serve dual functions: primary vehicle propulsion and emergency door lock operation. The control unit enables the traction battery to automatically switch to powering the door lock electromotive drive during emergency situations, eliminating the need for a separate emergency battery in the door assembly.
Solution Approach 2:
The control unit acts as an intermediary that manages the power supply switching between the on-board battery and traction battery. It monitors the power supply status and automatically activates the appropriate power source, ensuring seamless operation without requiring manual intervention or increasing mechanical operating forces on the door.
4Reliability
If an emergency battery is implemented, then the motor vehicle lock can be opened during on-board battery failure, but the device complexity increases
Solution Approach 1:
The traction battery, originally designed solely for vehicle propulsion, is made to serve dual functions: primary vehicle propulsion and emergency door lock operation. The control unit enables the traction battery to automatically switch to powering the door lock electromotive drive during emergency situations, eliminating the need for a separate emergency battery in the door assembly.
Solution Approach 2:
The invention merges the emergency power supply function with the existing traction battery system. Instead of adding a separate emergency battery to the door or lock housing, the control unit integrates the emergency power function into the central battery management system, combining multiple functions into a single unified power architecture.
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 door opening during emergencies without the need for additional backup batteries, reducing costs and weight while maintaining functional reliability over long time scales.
Implementation Method 1
the traction battery (2) provided for driving the motor vehicle acts as an emergency battery during emergency operation
Data Source
AI summary
A motor vehicle, in particular electric motor vehicle or hybrid motor vehicle, which is equipped with at least one electromotively actuable motor vehicle lock, and with at least one on-board battery and with an emergency battery for application of an electromotive drive of the motor vehicle lock during normal operation and during emergency operation. According to the invention, a traction battery provided for driving the motor vehicle acts as the emergency battery during emergency operation.