Battery Cooling Stop Temperature Control Using Natural Convection
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Solution Overview
Problem
Existing battery cooling systems operate continuously until the battery temperature falls below a specified threshold, regardless of ambient conditions, leading to high power consumption and reduced durability.
Innovation Solution
A battery apparatus with a processing circuitry that determines an estimated naturally-decreasing temperature based on the difference between the battery and atmospheric temperatures, and adjusts the cooling device's stop temperature accordingly, considering the vehicle's speed to optimize cooling control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling system operates continuously until the battery temperature falls below a specified threshold, then the battery temperature is maintained at a constant level, but power consumption increases and cooling system durability decreases
Solution Approach 1:
The patent implements dynamic cooling control by adjusting the cooling operation stop temperature based on ambient temperature conditions. When ambient temperature is low, the cooling stop temperature is set higher, allowing the cooling system to stop earlier and utilize natural convection cooling. This dynamic adjustment optimizes power consumption while maintaining battery temperature within safe ranges.
Solution Approach 2:
The system changes the control parameter (cooling stop temperature) based on ambient conditions. The processing circuitry calculates a dynamic stop temperature by adding an ambient temperature-based offset to the base stop temperature, enabling the cooling system to adapt its operation to environmental conditions and reduce unnecessary cooling cycles.
2Temperature
If the cooling system operates continuously until the battery temperature falls below a specified threshold, then the battery temperature is maintained at a constant level, but the durability of the cooling system is reduced
Solution Approach 1:
The system dynamically adjusts the cooling operation stop temperature based on ambient temperature, reducing unnecessary cooling operations in favorable ambient conditions. This extends the service life of the cooling system by minimizing its operational cycles while maintaining effective temperature control when needed.
3Device complexity
If the cooling system does not consider ambient influences, then the control logic is simple, but power consumption is high and cooling efficiency is reduced
Solution Approach 1:
The system modifies the control parameter (stop temperature) based on ambient temperature conditions. The processing circuitry calculates a dynamic stop temperature by adding an offset derived from ambient temperature to the base stop temperature, enabling adaptive cooling control that reduces power consumption while maintaining manageable system complexity.
Solution Approach 2:
The system incorporates ambient temperature feedback into the cooling control decision-making process. By continuously monitoring ambient temperature and adjusting the cooling stop temperature accordingly, the system optimizes its operation to reduce power consumption while maintaining battery temperature within safe ranges.
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 approach reduces power consumption and increases the durability of the cooling system by efficiently managing cooling operations based on ambient influences and vehicle speed, allowing for earlier cessation of cooling when convection cooling is effective.
Implementation Method 1
In a situation where a vehicle is driving and atmospheric temperature is lower than the battery temperature, a cooling effect of the battery can be expected due to convection.
Data Source
AI summary
Disclosed is a battery apparatus that measures a temperature of the battery apparatus, determines an estimated naturally-decreasing temperature based on information including a difference between the temperature of the battery apparatus and an atmospheric temperature in response to the temperature of the battery apparatus being higher than the atmospheric temperature, determine a stop temperature based on a reference temperature of the stop temperature and the estimated naturally-decreasing temperature, and stops a cooling operation of the battery apparatus in response to the temperature of the battery apparatus being lower than the stop temperature.