Double-Layer Battery Cell Case for Adaptive Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery cells face challenges in thermal stability, performance degradation in low-temperature environments, and high energy consumption for thermal management due to continuous heat dissipation.
Innovation Solution
A battery cell design featuring a double-layer cell case with a variable member that connects or separates the inner and outer bodies based on temperature, allowing insulation in low temperatures and heat dissipation in high temperatures, reducing energy consumption and enhancing thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single-layer metal case is used for heat dissipation, then thermal conductivity is improved, but thermal stability in varying temperature conditions deteriorates
Solution Approach 1:
The cell case is divided into an inner case and an outer case, creating a multi-layer structure. The inner case directly contacts the battery module for heat dissipation, while the outer case provides thermal insulation and structural protection, resolving the contradiction between heat dissipation and thermal stability.
Solution Approach 2:
The inner case is nested within the outer case, forming a concentric structure where the inner case handles thermal management and the outer case provides environmental protection. This nested configuration allows both heat dissipation and thermal stability functions to coexist.
2Reliability
If continuous heat dissipation is implemented, then thermal runaway prevention is improved, but energy consumption deteriorates
Solution Approach 1:
The phase change material undergoes periodic phase transitions (solid-liquid-solid) based on temperature cycles. When the battery generates excess heat, the PCM melts and absorbs heat; when cooling is needed, the PCM solidifies and releases heat, providing periodic thermal regulation without continuous energy input.
Solution Approach 2:
The phase change material provides self-regulating thermal management by automatically absorbing heat during battery overheating and releasing heat during cooling, without requiring external power input or active control systems.
3Reliability
If thermal management fluids are used for heating in low-temperature environments, then battery performance is improved, but energy consumption deteriorates
Solution Approach 1:
The phase change material stored in the hollow cavity of the outer case serves as a self-service thermal reservoir. During battery operation, it absorbs and stores heat. In low-temperature conditions, this stored heat is released to the battery, providing passive heating without requiring external energy input.
Solution Approach 2:
The system recovers heat that would otherwise be wasted during battery operation and storage. The phase change material captures excess heat during high-temperature periods and recovers it for use during low-temperature periods, creating a thermal energy recycling system.
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
Improves thermal stability, extends battery life, and reduces energy consumption by optimizing thermal management across varying temperature conditions.
Implementation Method 1
a variable member disposed in the second accommodation space and connected to the first body, and connected to or separated from the second body according to a preset variable temperature
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure relates to a battery cell according to an embodiment of the present disclosure includes: a cell case including a first body forming a first accommodation space for accommodating an electrode assembly therein; a second body accommodating at least a portion of the first body; and a second accommodation space formed between the first body and the second body; and a variable member disposed in the second accommodation space and connected to the first body, and connected to or separated from the second body according to a preset variable temperature.