Battery Module Lower-Frame Engraving to Delay Thermal Propagation
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Solution Overview
Problem
Existing battery modules face challenges in effectively transferring and dissipating heat generated during thermal runaway, leading to potential thermal propagation and safety hazards, especially in battery packs used in electric vehicles.
Innovation Solution
The battery module features an engraved structure on its lower frame with increased heat transfer area, filled with thermal resin, which facilitates rapid conduction heat transfer to a pack case, and through-slots in the base plate to limit heat conduction between modules, promoting efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery modules are arranged closely to increase space utilization, then production efficiency and space utilization are improved, but heat dissipation becomes insufficient leading to overheating risks
Solution Approach 1:
The battery module is segmented into multiple heat dissipation channels by dividing the heat dissipation plate into corresponding sections. Each channel includes a heat generating component, heat dissipation component, and heat dissipation channel arranged alternately, allowing heat from different battery cells to be dissipated independently and efficiently through dedicated pathways.
Solution Approach 2:
The heat dissipation channels are nested within the battery module structure itself, with heat dissipation components positioned between adjacent heat generating components. The heat dissipation plate is integrated into the module framework, creating a compact nested arrangement that maximizes heat dissipation surface area without increasing overall module volume.
2Device complexity
If traditional heat dissipation structures are used, then structure is simple, but heat dissipation efficiency is low and thermal management is insufficient
Solution Approach 1:
Different regions of the battery module are equipped with differentiated heat dissipation structures tailored to local thermal requirements. The heat dissipation plate is divided into multiple sections corresponding to different heat generating components, with each section optimized for its specific thermal load and positioning within the module.
Solution Approach 2:
The heat dissipation system transitions from traditional single-direction or surface-based cooling to a multi-dimensional channel structure. Heat dissipation channels are arranged in alternating sequences with heat generating components along the length of the module, creating extended thermal pathways that efficiently conduct heat from multiple dimensions rather than relying on conventional external cooling surfaces.
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 enhances heat dissipation by increasing the heat transfer area and limiting conduction paths, effectively suppressing and delaying thermal runaway propagation within the battery pack.
Implementation Method 1
a heat dissipation plate (330) extending along the length of the battery module and including a plurality of heat dissipation channels
Implementation Method 2
a coolant flowing through the channels absorbs heat from the battery cells
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A battery module may include a plurality of battery cells, and a module case accommodating the plurality of battery cells. In addition, an outer surface of a lower frame of the module case may be formed with a plurality of engraved structures, and the plurality of engraved structures may include a space for accommodating a thermal resin.