Thermal Management Solution for Portable Power Banks

Thermal conductive pads, aerogel insulation pads, and graphite sheets to improve heat dissipation, thermal insulation, and charging safety in high-power portable charging devices.

Project Background

As portable power banks continue evolving toward higher charging power, larger battery capacity, and more compact structures, thermal management has become a critical challenge for both performance and safety.

During fast charging and high-current discharge, internal components such as:

• Battery cells
• Power management ICs
• MOSFETs
• Charging control modules

Generate significant heat inside the compact enclosure. Without effective thermal management, excessive heat accumulation may negatively impact charging efficiency, battery lifespan, user comfort, and operational safety.

To address these challenges, we offer an integrated thermal management solution that combines the following functionalities:

• Thermal conductive pads
• Aerogel insulation pads
• Graphite sheets

For high-performance portable charging devices.

Customer Challenges

1. Severe Heat Accumulation in Compact Space

Fast charging technology significantly increases power density inside portable power banks. The internal electronic components and battery modules generated concentrated heat in a limited installation space.The customer required a solution capable of:

• Rapid heat transfer
• Heat spreading
• Thermal isolation between hot zones and battery cells

2. Surface Temperature Control

Excessive external surface temperature affects:

• User experience
• Product reliability
• Safety compliance

The customer needed to reduce localized hot spots during high-power charging and discharging conditions.

Battery cells are highly sensitive to elevated temperatures. Continuous heat exposure may:

• Accelerate battery aging
• Reduce cycle life
• Increase thermal runaway risk

An effective thermal insulation solution was required to isolate heat-generating components from the battery pack.

4. Ultra-Thin Internal Structure Constraints

The portable power bank featured a compact and lightweight structure with extremely limited internal space, requiring:

• Thin thermal interface materials
• Flexible heat spreading layers
• Lightweight insulation materials

Solution

Integrated Thermal Management Solution

To achieve efficient heat dissipation and thermal protection, a multi-material thermal management architecture was developed using:

• Thermal Conductive Pads
• Aerogel Insulation Pads
• Graphite Sheets

Each material performed a dedicated thermal function within the system.

1. Thermal Conductive Pads

The thermal conductive pads were applied between:

• Power ICs
• MOSFETs
• PCB hot spots
• Aluminum housing

to reduce thermal resistance and create an efficient heat transfer path.

Key Advantages

• Excellent gap filling
• High compressibility
• Stable thermal conductivity
• Vibration resistance
• Long-term reliability

2. Aerogel Insulation Pads

Aerogel insulation pads were installed between:

• Heat-generating components
• Battery cells
• Structural frames

to minimize thermal transfer toward temperature-sensitive battery areas.

Key Advantages

• Ultra-low thermal conductivity
• Excellent thermal insulation
• Lightweight structure

3. Graphite Sheet

Graphite sheets were integrated into the internal structure to rapidly spread concentrated heat away from hot spots.

The graphite layer effectively distributed heat across a larger surface area, helping lower peak temperatures during fast charging operation.

Key Advantages

• Excellent in-plane thermal conductivity
• Ultra-thin structure
• Rapid heat spreading capability

Key Material Features

Results & Benefits

Improved Charging Thermal Performance

The integrated thermal solution significantly reduced internal heat accumulation during high-power charging and discharging operation.

Lower Surface Temperature

The graphite heat spreading layer effectively reduced localized hot spots, improving user comfort during handheld operation.

Enhanced Battery Protection

Aerogel insulation pads minimized heat transfer toward battery cells, helping improve:

• Battery lifespan
• Charging safety
• Long-term stability

Optimized Compact Design

The ultra-thin thermal materials supported lightweight and compact product architecture without sacrificing thermal performance.

Why Choose Our Thermal Materials

Customization Capability

• Thickness
• Shape
• Thermal conductivity