Electric Vehicle Energy Management for Power Gap Bridging
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Solution Overview
Problem
The range of electrically drivable vehicles that rely on external electrical energy supply is limited when bridging gaps in the external energy source, leading to increased energy consumption and demands on the drive and braking systems, especially when using internal energy storage devices.
Innovation Solution
A method that dynamically adjusts the energy management of auxiliary consumers by setting different threshold values for parameters like pressure, temperature, and CO2 concentration in two modes: one for normal driving connected to an external energy source and another for bridging gaps, reducing energy consumption and extending the vehicle's range without compromising passenger comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle uses an internal energy storage device to bridge gaps in external power supply, then the vehicle can maintain operation during power outages, but the range is limited and energy consumption increases
Solution Approach 1:
The control unit pre-charges the buffer storage device (capacitor or battery) while the vehicle is connected to the external power supply. This preliminary action ensures that sufficient energy is stored in advance to bridge upcoming power gaps, allowing the vehicle to maintain operation during outages without excessive energy consumption from the internal energy storage device during normal operation
Solution Approach 2:
The invention introduces a buffer storage device (capacitor or battery) as an intermediary energy storage component between the external power supply and the internal energy storage device. This buffer acts as a mediator that can quickly discharge to bridge power gaps, reducing the demand on the internal energy storage device and extending the vehicle's operational range while maintaining reliability during power outages
2Reliability
If the vehicle uses an internal energy storage device to bridge power gaps, then operation can be maintained, but the drive and braking systems face increased demands
Solution Approach 1:
The buffer storage device is pre-charged while connected to external power supply, so that during power gaps the vehicle can draw from this pre-stored energy rather than immediately demanding high power from the drive system or overworking the braking system for regenerative charging
Solution Approach 2:
The buffer storage device serves as an intermediary that decouples the power gap bridging function from the internal energy storage device and drive system. This intermediary can quickly deliver the high power needed during outages without placing excessive demands on the drive and braking systems, as it can be charged more gradually when external power is available
Data Source
Figure 1A~1B
AI summary
According to one embodiment, a method (1000) for operating an electrically powered vehicle (100) comprises: determining whether the vehicle (100) is in a first mode, in which it is connected to an external electrical power source, or in a second mode, in which it is not connected to the external electrical power source; setting a respective first value for a threshold and/or setpoint of at least one parameter (T, c, p) of at least one subsystem (5, 6, 7) of the vehicle (100) when the vehicle (100) is in the first mode, or setting a respective second value for the threshold and/or setpoint, which differs from the first value for the threshold and/or setpoint, when the vehicle (100) is in the second mode;and controlling or regulating the at least one parameter (T, c, p) during driving using the threshold value of the at least one parameter (T, c, p) and/or the setpoint value of the at least one parameter (T, c, p).;