Battery Module Thermal Interface for Electrode Terminal Cooling
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Solution Overview
Problem
Conventional battery modules experience reduced heat conduction efficiency due to air gaps between metal plates and battery cell electrode terminals, leading to degraded performance and potential safety issues like fire or explosion.
Innovation Solution
Incorporating a heat conductive member, such as a liquid glue or heat dissipation paste, into the air gap between the metal plate and battery cell electrode terminals, which is injected through specific openings and cured to enhance heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protrusions are formed on the metal plate for spot welding connection, then electrical connection between the metal plate and battery cell electrode terminals is improved, but air gaps are formed between the metal plate and battery cells which interrupt heat conduction and reduce cooling efficiency
Solution Approach 1:
A heat conductive member (thermal paste or thermal pad) is introduced as an intermediary substance between the metal plate and battery cells to fill the air gaps created by protrusions. This mediator enables effective heat conduction from the battery cells to the metal plate while maintaining the electrical connection structure with protrusions for spot welding.
Solution Approach 2:
The thermal conductivity parameter of the interface between metal plate and battery cells is improved by changing the medium from air (poor thermal conductor) to heat conductive material (good thermal conductor). This parameter change resolves the heat conduction issue while preserving the electrical connection structure.
2Temperature
If the air gap between metal plate and battery cells is minimized or eliminated, then heat conduction is improved, but it is difficult to suppress generation of the air gap in structures with protrusions
Solution Approach 1:
The heat conductive member acts as a flexible intermediary that can adapt to the presence of protrusions while still filling the resulting air gaps. This allows the structure with protrusions to be maintained for manufacturing and electrical connection purposes, while the thermal paste or pad ensures continuous thermal contact.
Solution Approach 2:
The heat conductive member is applied locally in the air gap regions between the metal plate and battery cells. This localized application targets the specific areas where thermal contact is needed without interfering with the overall structural design including protrusions for electrical connection.
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
This solution significantly improves heat conduction rates, allowing for efficient heat dissipation and reducing the risk of overheating and safety hazards in battery modules.
Implementation Method 1
a heat conductive member disposed in an inner space between the electrode terminals of the battery cells and the metal plate
Implementation Method 2
A liquid glue or a heat dissipation paste may be used for the heat conductive member and be cured after being injected into the heat conductive member arrangement part
Data Source
AI summary
Discussed is a battery module, and more particularly, to a battery module in which an inner space between a battery cell and a metal plate is filled with a heat transfer member so that conduction of heat generated in the battery cell is improved.