Battery Pack Separation Wall for Thermal Runaway Isolation
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Solution Overview
Problem
Conventional battery packs face issues with heat propagation from one battery module to neighboring modules during thermal runaway due to high thermal conductivity of metal separation walls, potentially leading to explosions.
Innovation Solution
Incorporation of a main separation wall with an insulating material, such as heat-resistant plastic or silicone, within the battery pack structure to block or delay heat transfer between modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal main separation wall is used to support battery modules, then structural strength and stability are improved, but thermal conductivity increases causing heat propagation during thermal runaway
Solution Approach 1:
The patent applies composite materials by combining metal base plates (for structural strength) with insulating material layers (for thermal isolation). The main separation wall consists of a metal base plate with an insulating material layer formed on its surface, creating a composite structure that simultaneously provides mechanical support and thermal blocking capabilities. This resolves the contradiction by integrating both required functions into a single composite component.
Solution Approach 2:
The patent applies local quality by adding insulating material specifically to the surface of the metal base plate that faces adjacent battery modules. The insulating layer is selectively positioned at the location where thermal isolation is most critical (the separation surface), while the metal base plate retains its full structural strength. This localized application of different material properties optimizes both strength and thermal isolation without unnecessary material usage.
2Object-affected harmful factors
If insulating material is added to the main separation wall to block heat, then thermal isolation is improved, but device complexity increases
Solution Approach 1:
The patent merges the structural support function and thermal isolation function into a single integrated main separation wall component. The insulating material layer is formed directly on the metal base plate, creating a combined structure that performs both functions simultaneously. This eliminates the need for separate insulating components or additional assembly steps, thereby reducing device complexity while achieving effective thermal isolation.
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
Effectively prevents or delays heat propagation to other battery modules, reducing the risk of thermal runaway spreading and enhancing safety.
Implementation Method 1
the main separation wall includes: an insulating material with low thermal conductivity
Data Source
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AI summary
Disclosed herein relates to a battery pack for accommodating a battery module, including: a pack case in which a battery module settles; wherein the pack case includes: a main separation wall; a base plate coupled to the main separation wall and including a module area wherein the battery module is settled; and a side wall coupled along a perimeter of a base plate coupled to the main separation wall; wherein the main separation wall includes an insulating material with low thermal conductivity.