Battery Pack Substrate Support for Impact Protection and Heat Dissipation
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Solution Overview
Problem
Existing battery packs face challenges in protecting the substrate from damage due to external forces and ensuring efficient heat dissipation, particularly in configurations where the substrate is exposed and vulnerable.
Innovation Solution
The battery pack design includes a support structure that extends along the substrate to prevent damage from external forces and incorporates a thermally conductive material to dissipate heat, while maintaining electrical isolation from protection elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate is made exposed and accessible for protection element placement, then the protection circuit can be implemented, but the substrate becomes vulnerable to external forces and damage
Solution Approach 1:
A support structure is introduced beneath the substrate to provide preemptive mechanical reinforcement. This support structure acts as a cushioning element that absorbs and distributes external forces before they can damage the substrate, allowing the substrate to remain exposed for protection circuit functionality while being protected from mechanical damage.
Solution Approach 2:
The support structure serves as an intermediary element between the external environment and the substrate. It mediates the interaction by absorbing mechanical stresses and protecting the substrate from direct exposure to harmful external forces, while still allowing the protection element to function on the substrate surface.
2Strength
If the support structure is placed close to the protection element, then mechanical support is provided, but electrical isolation must be maintained to prevent interference
Solution Approach 1:
The support structure is designed with spatially differentiated properties: in regions close to the protection element, it provides mechanical support while maintaining electrical isolation through material selection or structural design. In other regions, it can provide full mechanical support without isolation constraints. This local quality approach allows the support to be placed close to the protection element while maintaining electrical isolation only where necessary.
3Strength
If the substrate is reinforced with additional support structures, then damage prevention is improved, but heat dissipation pathways may be blocked
Solution Approach 1:
The support structure is segmented into multiple discrete elements rather than a continuous solid structure. This segmentation creates gaps and channels between the support elements that allow heat to dissipate from the substrate while still providing adequate mechanical support. The segmented design maintains structural strength while preserving thermal pathways.
Solution Approach 2:
The support structure incorporates a porous or mesh-like configuration that provides mechanical reinforcement while maintaining open pathways for heat dissipation. The porous structure allows thermal energy to pass through and away from the substrate while the solid framework of the support continues to provide damage resistance.
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
The support structure stabilizes the substrate, preventing damage and ensuring effective heat dissipation, thereby enhancing the durability and performance of the battery pack.
Implementation Method 1
The molding portion may include a thermally conductive material configured to discharge heat emitted from the substrate to an outside of the protection circuit module
Data Source
AI summary
A battery pack includes a battery cell and a pouch accommodating the battery cell. The pouch includes a terrace extending in a first direction in which an electrode of the battery cell is drawn out. The pouch also includes a substrate including a protection element on a first surface configured to control charging and discharging of the battery cell. A second surface opposing the first surface is opposite to a module seating surface of the terrace. The pouch also includes a molding portion covering the protection element on the first surface, and a support between the molding portion and the substrate and configured to support the substrate.