RESS Thermal Conditioning Based on State of Charge
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Solution Overview
Problem
Existing methods for thermal conditioning of rechargeable energy storage systems in vehicles are not optimal, particularly when the system has limited life remaining, as they do not effectively manage temperature based on the state of charge, which can impact energy efficiency and vehicle performance.
Innovation Solution
A method and system that estimate the state of charge of the rechargeable energy storage system and adjust thermal conditioning accordingly, using a processor-controlled thermal conditioning system to maintain optimal temperature ranges based on the state of charge, thereby optimizing energy use and extending the life of the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If continuous thermal conditioning is applied to maintain RESS temperature within limits, then temperature stability is improved, but energy consumption increases and system complexity increases
Solution Approach 1:
The patent implements dynamic thermal conditioning by adjusting temperature limits and conditioning intensity based on the real-time state of charge (SOC) of the RESS. The system transitions from static continuous conditioning to dynamic adaptive conditioning, where thermal management parameters are modified according to battery charge levels, thereby reducing unnecessary energy consumption while maintaining temperature stability when needed.
Solution Approach 2:
The system changes thermal management parameters (temperature limits, conditioning thresholds) based on the state of charge of the RESS. By modifying operational parameters dynamically rather than maintaining fixed settings, the system optimizes the balance between temperature control and energy consumption, applying thermal conditioning only when necessary based on current battery conditions.
2Temperature
If continuous thermal conditioning is applied to maintain RESS temperature within limits, then temperature stability is improved, but device complexity increases
Solution Approach 1:
The patent modifies thermal management parameters dynamically based on RESS state of charge, replacing complex continuous control with simpler conditional parameter adjustment. The system uses SOC-based threshold comparisons to determine thermal conditioning needs, reducing control complexity while maintaining effective temperature management.
3Temperature
If thermal conditioning is applied when RESS temperature approaches limits, then temperature control is improved, but energy efficiency deteriorates when limited life remains in RESS
Solution Approach 1:
The system dynamically adjusts thermal conditioning strategy based on the remaining life and state of charge of the RESS. When SOC indicates limited remaining life, the system dynamically modifies temperature thresholds and conditioning intensity, accepting greater temperature variations to conserve energy for propulsion rather than intensive thermal management of an aging battery system.
Data Source
AI summary
Methods, systems, and vehicles are provided that provide for thermal conditioning of a vehicle rechargeable energy storage system (RESS). A thermal conditioning system is coupled to the RESS, and is configured to thermally condition the RESS. A control system is coupled to the thermal conditioning system, and is configured to estimate a state of charge for the RESS and provide instructions for the thermal conditioning system to thermally conditioning the RESS based on the state of charge.