Battery Internal Phase Change Materials Thermal Management
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Solution Overview
Problem
Batteries face safety risks and operational degradation due to internal heat generation, leading to uneven temperature profiles and potential thermal runaway, which existing cooling methods fail to adequately address.
Innovation Solution
Incorporation of phase-change materials into the negative and positive electrodes and separator of electrochemical cells to absorb and release thermal energy at a constant temperature, maintaining a uniform temperature and preventing excessive heat buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If phase change material is incorporated into electrodes and separator, then uniform temperature distribution is achieved, but device complexity increases
Solution Approach 1:
The phase change material is merged with the electrode structure by incorporating it into the slurry mixture during manufacturing. This integration combines the electroactive components and thermal management functionality into a single unified structure, eliminating the need for separate cooling systems and reducing overall device complexity.
Solution Approach 2:
The phase change material serves multiple functions simultaneously: it provides thermal management during normal operation, maintains structural integrity of the electrode, and can participate in electrochemical reactions. This multi-functionality reduces the need for additional dedicated components, simplifying the overall battery design.
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 effectively reduces the risk of thermal runaway and premature aging by maintaining a stable temperature, enhancing the safety and operational life of batteries while minimizing impact on energy density and power density.
Implementation Method 1
The electrochemical cell comprises a phase change material
Implementation Method 2
absorb and release thermal energy at a constant temperature
Implementation Method 3
maintaining a uniform temperature and preventing excessive heat buildup
Data Source
Figure 1
AI summary
An electrochemical cell includes a negative electrode, a positive electrode, a separator positioned between the negative electrode and the positive electrode; and a phase change material within the electrochemical cell.