EV Traction Battery Output Control for External Load Range Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric vehicles face a challenge in managing the energy output from their traction batteries to external loads without compromising their ability to reach intended destinations, as drawing energy from the battery reduces the vehicle's range and may lead to insufficient charge for reaching planned destinations.
Innovation Solution
A control device that determines the current state of charge of the traction battery and the energy requirement for a future route, comparing these to initiate measures such as deactivating energy output to external consumers or alerting the user when the battery's state of charge approaches a critical level, ensuring sufficient energy remains for safe travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical energy is supplied to external consumers from the traction battery, then the utility of the electrical energy storage unit is improved, but the range of the electric vehicle deteriorates
Solution Approach 1:
The control device continuously monitors the state of charge of the traction battery and uses this feedback information to dynamically control the energy output to external consumers. The control device determines the current state of charge, compares it with a threshold value, and adjusts the energy supply accordingly, creating a closed-loop control system that prevents range anxiety while enabling external power supply functionality.
Solution Approach 2:
The system dynamically adjusts the energy output to external consumers based on real-time battery state of charge conditions. Rather than a fixed output mode, the control device modifies the energy supply parameters (enable/disable output) according to the current battery status, making the system adaptable to changing energy availability and preventing depletion below critical thresholds.
2Adaptability or versatility
If energy output to external consumers is enabled, then the service function of the vehicle is improved, but the risk of insufficient charge for reaching destinations increases
Solution Approach 1:
The control device takes preliminary protective action by monitoring the state of charge and preventing energy output when the battery charge falls below a predetermined threshold. This anticipatory control mechanism stops energy depletion before it reaches critical levels that would compromise the vehicle's ability to reach its destination, thereby maintaining reliability while enabling service functions.
Solution Approach 2:
The system performs preliminary assessment of the battery state of charge before enabling or disabling energy output to external consumers. By evaluating the current charge level against threshold values in advance, the control device ensures that energy supply decisions are made only when sufficient charge is available, preventing situations where the battery would be depleted below safe operating levels.
Data Source
AI summary
The invention relates to controlling the energy output from an electric vehicle to an external consumer. According to the invention, an energy requirement for reaching a predefined destination or along a predefined route is determined. If the electrical energy stored in the traction battery falls to a critical level, which is required for safely reaching the destination, then the energy output to an external consumer can be stopped. Alternatively, a user can be informed at least of a critical status of this type.