Experimental Study of a Thermal Ground Plane in a Battery Thermal Management System for Electric Aircraft Applications
Bibliographic record
Abstract
The use of Thermal Ground Plane (TGP) based Battery Thermal Management Systems (BTMS) is showing promise and interest from both academia and the electric vehicle industry for its thermal properties. These passive heat exchangers are a variant of heat pipes that rely on an internal liquid-vapor phase change to achieve a thermal conductivity higher than that of the materials from which they are made. Because they are fluid dependent, they do not have constant thermal properties like metals and an understanding of this variation is required before using them as a BTMS. This paper investigates the experimental effects of orientation, heat flux and operating temperatures on the thermal performance of the TGP. A thermal test bench is used to provide the temperature distribution on the TGP with respect to the above test parameters, and thus the effective thermal conductivity and thermal resistance of the TGP in these configurations. It is shown that the effective thermal conductivity of the TGP prototype varied by up to 50 % over the power profile used. Variation in orientation also resulted in 0.5 to 1.8 times the baseline thermal conductivity. This study uses a new way of representing TGP behavior and shows that thermal conductivity is closely related to internal operating temperature. This study demonstrates that vehicle integration and temperature operating range are critical factors in the consideration and development of a TGP-based BTMS, particularly for aerospace applications.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".