UAV Battery Pack Heat Sink Layout for All-Round Cooling
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Solution Overview
Problem
Unmanned aerial vehicle (UAV) lithium-ion battery packs face significant heat dissipation challenges due to high-power working conditions, leading to elevated temperatures and reduced service life, with existing heat dissipation technologies being inefficient.
Innovation Solution
A battery pack design incorporating a housing with a heat sink and thermally conductive pads that surrounds the battery body, with the heat sink in thermal contact with module electrodes to facilitate all-round heat dissipation, reducing thermal resistance and improving heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If high-power working conditions are used to increase flight time, then the energy supply capability is improved, but the battery temperature increases and service life is reduced
Solution Approach 1:
The battery pack is divided into multiple battery modules (first battery module, second battery module, etc.) arranged in series. Each module can be independently managed and cooled, allowing heat dissipation to be distributed across multiple locations rather than concentrated in a single area, thus managing temperature while maintaining high capacity for extended flight time
Solution Approach 2:
A heat dissipation plate is introduced as an intermediary component between the battery modules. The plate includes heat dissipation channels that facilitate heat transfer from the battery modules to the surrounding environment. This intermediary structure enables efficient heat dissipation without directly modifying the battery cells themselves, allowing high-power operation for extended flight time while controlling temperature
2Use of energy by moving object
If multiple battery modules are connected in series and parallel to increase capacity, then the energy supply capability is improved, but the heat dissipation efficiency deteriorates
Solution Approach 1:
The battery pack is segmented into multiple independent battery modules connected in series and parallel configurations. Each module has its own heat dissipation path through the heat dissipation plate, allowing heat to be distributed and dissipated from multiple locations simultaneously. This segmentation maintains high energy supply capability while preventing heat accumulation that would reduce dissipation efficiency
Solution Approach 2:
The heat dissipation plate extends in the length direction of the battery pack, creating additional heat dissipation surfaces and pathways. By utilizing the longitudinal dimension of the pack, the design increases the effective heat dissipation area without compromising the series-parallel battery configuration needed for high energy supply capability
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 design effectively reduces the battery pack temperature during operation, prolongs its service life, and meets high-power and high-heat dissipation requirements for UAVs by enhancing heat dissipation performance.
Implementation Method 1
the heat sink is in thermal contact with a module electrode disposed on the upper end of the battery body... the heat sink is disposed on the housing and in thermal contact with module electrodes of the battery body to exchange heat between the heat sink and the module electrode
Data Source
AI summary
A battery pack includes a battery body, a housing, and a heat sink. The housing surrounds a part of the surface of the battery body. The heat sink is disposed on the housing. A bottom surface of the heat sink abuts against a bus board disposed on the upper end of the battery body, and the heat sink is in thermal contact with a module electrode at the upper end of the battery body. In the battery pack provided by the present application, heat dissipation around the battery body could be achieved, heat generated by a tab or heat conducted by the battery body to the tab could also be guided outwards, so that all-round heat dissipation around the battery pack is achieved. The battery pack provided by the present application is suitable for the unmanned aerial vehicle and meets the high heat dissipation requirement.