Vehicle Body Controller Key-Off Energy Management
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Solution Overview
Problem
The increasing power requirements in vehicles due to additional electrical modules lead to higher battery drain when the ignition is off, necessitating heavier, larger, and more expensive batteries.
Innovation Solution
A body controller is programmed to manage vehicle features based on a vehicle flag indicating transport, manufacturing, or consumer status, limiting battery consumption by disabling or slowing down non-essential features during key-off modes such as transportation or hibernation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If more electrical modules are added to the vehicle, then vehicle features and functionality are improved, but battery power consumption during key-off increases
Solution Approach 1:
The system dynamically adjusts the operational state of electrical modules based on detected conditions (transport mode, hibernation mode, factory mode). The body controller changes the power supply state from enabled to limited or disabled based on vehicle status, making the power consumption adaptive rather than static.
Solution Approach 2:
The system changes the power supply parameter (from full power to limited or no power) based on the detected vehicle mode. This parameter change allows the same electrical modules to operate differently under different conditions, reducing overall power consumption during key-off periods.
2Duration of action of stationary object
If battery power consumption is reduced by limiting vehicle features, then battery life is extended, but vehicle functionality during transport is reduced
Solution Approach 1:
The system makes vehicle functionality dynamic by enabling features during normal operation and disabling or limiting them during transport or hibernation modes. The body controller adjusts the operational state based on detected conditions, allowing the vehicle to adapt its functionality to current needs.
Solution Approach 2:
The system segments the operational requirements into different modes (normal operation vs. transport/hibernation). During normal operation, full functionality is available. During transport or hibernation, only essential functions are maintained, separating critical operations from non-critical ones.
3Loss of energy
If vehicle features are limited during transport mode, then battery drain is reduced, but customer interaction capability is reduced
Solution Approach 1:
The system dynamically adjusts feature availability based on the detected mode. During transport mode, the body controller limits power to non-essential features to reduce battery drain. When normal mode is detected, full functionality is restored, including customer interaction capabilities.
Solution Approach 2:
The system performs preliminary action by detecting the transport mode before significant battery drain occurs and proactively limiting power to appropriate features. This prevents excessive battery consumption while the vehicle is being transported to the customer.
4Power
If a heavier, larger battery is used to meet increased power requirements, then power availability is improved, but vehicle weight and cost increase
Solution Approach 1:
Instead of providing continuous full power availability, the system dynamically manages power distribution. During key-off periods in transport or hibernation modes, power is limited or cut to non-essential features, allowing the use of a smaller, lighter battery while maintaining adequate power availability during essential operations.
Solution Approach 2:
The system changes the power supply parameters based on operational mode, allowing the same battery to provide different power levels at different times. This parameter adjustment enables the use of a smaller battery that wouldn't be required if full power were continuously available.
Data Source
AI summary
A vehicle may include a body controller programmed to limit operation of at least one vehicle feature to reduce battery consumption during transit of the vehicle in response to a vehicle flag indicating a transport status, and to enable operation of the at least one vehicle feature during manufacturing in response to the vehicle flag indicating a factory status.