Battery Pack Thin Film Coating for Waterproofing and Heat Dissipation
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Solution Overview
Problem
Existing battery packs face insufficient waterproof and heat dissipation performance, which is critical for outdoor and high-humidity environments where they are used in devices like electric vehicles and tools.
Innovation Solution
A battery pack design featuring a thin film fluororesin coating agent with low viscosity, a rubber ring with inorganic fillers for enhanced waterproofing, and thermally conductive materials for efficient heat dissipation, integrated within a structured exterior case to prevent vibration and ensure effective heat release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional waterproofing measures are used in battery packs, then basic waterproof protection is achieved, but waterproof performance and heat dissipation performance remain insufficient
Solution Approach 1:
The patent applies a thin film coating agent (8-200 μm thickness) to the exterior case and internal components instead of conventional thick waterproof layers. This thin film provides effective waterproof protection while maintaining structural simplicity and avoiding the complexity of multi-layer conventional waterproofing systems.
Solution Approach 2:
The patent uses composite materials combining organic resin base materials with inorganic fillers (such as aluminum oxide, aluminum nitride, or boron nitride) in the waterproof coating and rubber ring. This composite structure achieves superior waterproof performance and simultaneous heat dissipation capability without increasing structural complexity.
2Power
If high power systems are implemented to meet increasing demand, then power output improves, but heat generation increases causing battery performance degradation
Solution Approach 1:
The patent introduces thermally conductive inorganic fillers (aluminum oxide, aluminum nitride, boron nitride) as intermediary materials between heat sources (batteries) and the exterior case. These fillers act as thermal mediators that efficiently conduct heat away from batteries to the exterior case for dissipation, enabling high power operation without excessive temperature rise.
Solution Approach 2:
The patent changes the thermal conductivity parameter of the coating material by incorporating high thermal conductivity inorganic fillers. The coating layer's thermal conductivity is enhanced from typical organic resin levels to sufficiently high values for effective heat dissipation, allowing the system to handle high power generation without battery performance degradation.
3Reliability
If thick coating layers are applied for waterproofing, then waterproof protection improves, but heat dissipation capability deteriorates
Solution Approach 1:
The patent employs a thin film coating approach with thickness controlled at 8-200 μm. This thin film configuration provides adequate waterproof protection while maintaining sufficient thermal conductivity for heat dissipation, avoiding the heat blocking effect that would occur with thick conventional waterproof coatings.
Solution Approach 2:
The patent creates a composite coating material where inorganic fillers with high thermal conductivity (aluminum oxide, aluminum nitride, boron nitride) are dispersed in an organic resin matrix. This composite structure ensures that even at thin film thicknesses, the coating maintains both waterproof functionality and heat dissipation capability, resolving the trade-off between waterproofing thickness and thermal performance.
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 solution provides a battery pack with improved waterproof and heat dissipation performance, preventing performance degradation due to heat and moisture, thus ensuring reliable operation in demanding environments.
Implementation Method 1
The article of the electric system is coated with a thin film coating agent. The coating agent may be a fluororesin coating agent. Viscosity of the coating agent may be less than or equal to 80 mP·s. A film thickness of the coating agent may range from 8 μm to 200 μm.
Implementation Method 2
a rubber ring is provided between an inner wall of the battery holder and a positive electrode of the battery, a rubber material of the rubber ring containing an inorganic filler
Implementation Method 3
a thermally conductive material 4 is disposed between the battery block and the exterior case
Data Source
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AI summary
A battery pack having waterproof performance and heat dissipation performance is provided. A battery pack according to the present technology includes: an exterior case; and an article of an electric system including a battery, the article being accommodated in the exterior case. The article of the electric system is coated with a thin film coating agent. The article of the electric system may be at least a battery, a circuit board, and an electrode tab that electrically connects between the batteries or between the battery and the circuit board. The coating agent may be a fluororesin coating agent. Viscosity of the coating agent may be less than or equal to 80 mP·s. A film thickness of the coating agent may range from 8 µm to 200 µm.