Hybrid Vehicle Control Module for Battery Charge Management
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Solution Overview
Problem
In hybrid vehicles, the accumulated charge amount of the secondary battery is not effectively lowered when motor travel is restricted, leading to inefficient energy management and potential delays in depleting the fuel to zero.
Innovation Solution
A control method for hybrid vehicles that includes a charger for external power supply, a driving power setting module, an accumulated charge ratio calculation module, an output limit setting module, and a mode setting module to prioritize motor travel or hybrid travel based on the battery's state, ensuring the battery is discharged efficiently even when motor travel is restricted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If motor travel is prioritized to lower accumulated charge amount in the secondary battery, then the battery charge management is improved, but the vehicle cannot operate when motor travel is restricted due to vehicle state or battery state
Solution Approach 1:
The patent implements dynamic switching between motor travel priority mode and hybrid travel priority mode based on real-time evaluation of vehicle state and battery state. The control module dynamically adjusts the driving mode to balance battery charge management with operational requirements, allowing the system to adapt to changing conditions rather than rigidly prioritizing motor travel.
Solution Approach 2:
The system changes operational parameters by switching between different travel priority modes. When motor travel is restricted, the system changes the priority parameter from motor travel to hybrid travel, allowing the internal combustion engine to operate and prevent fuel depletion delays while still managing battery charge levels.
2Loss of energy
If the vehicle is driven with higher priority given to motor travel mode, then the accumulated charge amount is reduced, but the remaining quantity of fuel becomes completely zero is delayed
Solution Approach 1:
The control module continuously monitors both battery charge levels and fuel quantity, using this feedback to dynamically adjust travel mode priority. When fuel level becomes critical, the system receives feedback and switches from motor travel priority to hybrid travel priority, ensuring the engine operates to prevent complete fuel depletion while still managing battery charge effectively.
Solution Approach 2:
The system dynamically adjusts the priority between motor travel and hybrid travel based on real-time fuel quantity and battery charge conditions. This dynamic switching allows the vehicle to reduce battery charge when fuel is充足, but switch to hybrid travel when fuel becomes critical, thereby preventing fuel depletion delays.
3Adaptability or versatility
If hybrid travel is prioritized to ensure vehicle operation when motor travel is restricted, then the vehicle availability is improved, but the accumulated charge amount cannot be effectively lowered
Solution Approach 1:
The system implements dynamic mode switching where the control module evaluates both vehicle operational requirements and battery charge management needs in real-time. When motor travel is restricted, the system dynamically switches to hybrid travel priority mode to ensure vehicle operation, but can switch back to motor travel priority mode when conditions allow, creating a balanced approach to both contradictions.
Solution Approach 2:
The control system periodically evaluates the need to switch between motor travel priority mode and hybrid travel priority mode based on changing vehicle and battery states. This periodic assessment allows the system to alternate between modes as needed, ensuring both vehicle availability and effective battery charge management over time.
Data Source
AI summary
In the case that the motor travel priority mode is set and the restriction mode is set as the control mode because of the request of the operation of the engine, the threshold value Peg that is smaller value between the obtained value (kw·Wout) from multiplying the output limit Wout of the battery by the preset conversion factor kw and the preset power Pset that is smaller than the converted output limit Wout of the battery at a normal time is compared with the driving power Pdrv*. The hybrid vehicle is driven with the motor travel in idle operation of the engine when the driving power Pdrv* is not more than the threshold value Peg, and the hybrid vehicle is driven with power from the engine when the driving power Pdrv* is more than the threshold value Peg.