Battery Cooling Power Selection for High-SOC Heat Control
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Solution Overview
Problem
Existing battery temperature adjustment systems for electric vehicles may not always effectively prevent battery deterioration in high temperature and high state of charge (SOC) states, especially when relying on external power source cooling.
Innovation Solution
A battery temperature adjustment system that includes a battery, a cooling device capable of being powered by either external power or the battery's own power, and a control device that uses a deterioration sensitivity map to select the most effective power source for cooling based on the battery's SOC and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling device is operated by electric power from the external power source to cool the battery in high temperature and high SOC state, then the battery temperature is reduced, but the battery deterioration may not be effectively prevented and energy efficiency is reduced
Solution Approach 1:
The system changes the operating parameters of the cooling device based on battery state. When battery temperature is high but SOC is low, the cooling device operates at high power mode using external power source. When SOC is high, the system switches to low power mode using battery power, and adjusts cooling intensity to maintain temperature while preventing deterioration. This dynamic parameter adjustment resolves the contradiction between temperature reduction and deterioration prevention.
Solution Approach 2:
The cooling control system dynamically adjusts its operation based on real-time battery conditions (temperature and SOC). The control device switches between different power sources and cooling intensities according to battery state, making the system adaptive rather than static. This dynamic approach allows optimal balance between cooling effectiveness and deterioration prevention under varying conditions.
2Temperature
If the cooling device is operated continuously to maintain low battery temperature, then battery temperature is controlled, but energy consumption increases
Solution Approach 1:
Instead of continuous cooling operation, the system uses periodic cooling cycles based on battery temperature thresholds and SOC levels. When temperature rises above threshold, cooling is activated; when temperature drops below threshold, cooling is deactivated. This periodic action maintains temperature control while significantly reducing energy consumption compared to continuous operation.
Solution Approach 2:
The cooling device is designed to serve multiple functions: aggressive cooling when temperature is critical, gentle cooling when SOC is high to prevent deterioration, and complete shutdown when conditions are optimal. This multi-functionality allows the same hardware to adapt to different operational requirements, reducing overall energy consumption while maintaining necessary temperature control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system effectively prevents battery deterioration by selectively using external power or the battery's power for cooling, based on the deterioration sensitivity, thereby maintaining optimal battery health.
Implementation Method 1
a cooling device to which the electric power from the external power source and the electric power from the battery are selectively supplied and configured to cool the battery
Data Source
AI summary
A battery temperature adjustment system includes: a battery; a cooling device to which electric power from an external power source and electric power from the battery are selectively supplied and configured to cool the battery; and a control device configured to control the cooling device to adjust a state of charge of the battery and a battery temperature. The control device stores a deterioration sensitivity map in which a deterioration sensitivity is preset according to the state of charge and the battery temperature, or is configured to calculate a deterioration sensitivity according to the state of charge and the battery temperature, and when a vehicle is connected to the external power source, the control device selects either the electric power from the battery or the electric power from the external power source based on the deterioration sensitivity to operate the cooling device.