Framework RK-09v1.0July 2026Executive Brief
Thermal Design Hierarchy
Heat kills batteries. Five thermal layers from cell to enclosure — each with quantifiable thresholds. Design top-down; validate bottom-up.
Updated July 2026 · 5 Figures · For B2B Buyers & OEM Partners
Figure 1: Five-layer thermal hierarchy — from cell-level heat generation to enclosure-level dissipation.
Figure 2: Thermal map of a 20000mAh power bank under 65W PD load. Hotspots and thermal paths visualized.
Figure 3: Thermal interface materials compared — thermal pads vs. paste vs. phase-change vs. graphene.
Figure 4: Six thermal design rules — architecture-level principles that prevent thermal throttling.
Figure 5: 20000mAh power bank — adding a $0.20 graphite heat spreader reduced peak temperature 12C, eliminating throttling.
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References
• JEITA — Battery Thermal Management Guidelines for Portable Devices (2023)
• IEEE — Thermal Design Methodology for High-Power Portable Electronics (2024)
• IPC-2152 — Standard for Determining Current-Carrying Capacity (2023)
• ASME — Heat Transfer in Compact Electronic Systems (2023)
