Battery Cell Thermal Coupling for Heating and Cooling Efficiency
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Solution Overview
Problem
When using a heating device to increase the temperature of a battery cell, the heat sink's heat dissipation is compromised, leading to decreased energy efficiency and longer time to reach the desired temperature.
Innovation Solution
A power supply device with a joining member that includes two metal plates thermally coupled to the battery cell and heat sink, respectively, allowing the thermal resistance of these plates to be dynamically adjusted based on the battery cell's temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat sink is thermally coupled to the battery cell, then heat dissipation performance is improved, but energy efficiency for raising battery temperature decreases
Solution Approach 1:
The joining member's thermal resistance is made dynamically changeable based on battery cell temperature. When heating is required, thermal resistance increases to prevent heat loss to the heat sink. When cooling is required, thermal resistance decreases to enhance heat dissipation. This dynamic adjustment resolves the contradiction between maintaining heat dissipation performance and preventing energy efficiency degradation during heating.
Solution Approach 2:
The thermal resistance parameter of the joining member is changed based on temperature conditions. By adjusting this physical parameter dynamically, the system can optimize heat transfer characteristics for different operational modes (heating vs. cooling), thereby resolving the contradiction between heat dissipation performance and heating energy efficiency.
2Temperature
If the heat sink is thermally coupled to the battery cell, then cooling performance is improved, but time to raise battery temperature increases
Solution Approach 1:
The joining member dynamically adjusts its thermal resistance based on temperature requirements. During heating operations, increased thermal resistance prevents heat loss to the heat sink, reducing the time required to reach desired temperature. During cooling operations, decreased thermal resistance maintains effective heat dissipation. This dynamic behavior resolves the time-performance trade-off.
3Use of energy by moving object
If thermal resistance of the joining member is increased, then heating energy efficiency is improved, but heat dissipation performance decreases
Solution Approach 1:
Rather than using a fixed high thermal resistance design, the joining member dynamically adjusts thermal resistance based on real-time temperature conditions. This allows the system to achieve high heating energy efficiency when needed while maintaining heat dissipation capability when required, resolving the contradiction between these two opposing requirements.
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 solution maintains heat dissipation performance during cooling while preventing a decrease in energy efficiency during heating, allowing the battery cell to reach desired temperatures more quickly.
Implementation Method 1
thermal resistance of the first metal plate and the second metal plate is changeable based on temperature of the battery cell
Implementation Method 2
a heater for heating the battery cell
Implementation Method 3
a heat sink
Data Source
AI summary
A battery cell, a heat sink, a joining member for joining the battery cell and the heat sink, and a heater for heating the battery cell are provided. A power supply device comprising: a 1 metal plate joined to a battery cell; and a 2 metal plate joined to the heat sink, wherein the thermal resistance of the 1 metal plate and the 2 metal plate can be changed based on the temperature of the battery cell.