Battery Module Separating Device with Embossed Chamber for Thermal Management
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Solution Overview
Problem
Existing battery module separating devices are either too stiff and unable to handle cell expansion, leading to high voltages, or have integrated cooling channels that can be damaged during expansion, preventing effective heat dissipation.
Innovation Solution
A separating device comprising two congruent, heat-conducting steel plates with embossments forming a chamber, which increases stiffness and allows for efficient heat dissipation while accommodating external forces, and can be filled with a gas or liquid for enhanced fire resistance and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If separating plates are made very stiff to prevent cell propagation, then fire resistance is improved, but the plates cannot handle expansion forces leading to high voltages
Solution Approach 1:
The separating device is divided into multiple separating elements (first separating element, second separating element, and optionally third and fourth separating elements) arranged in series between battery cells. This segmentation allows each element to independently handle expansion forces while maintaining overall fire resistance, as each element can flex slightly without compromising the barrier function of the complete assembly.
Solution Approach 2:
The separating device uses composite construction with heat-conducting materials (such as aluminum or steel) combined with fire-resistant materials. The heat-conducting material provides thermal management and flexibility to handle expansion, while the fire-resistant material maintains propagation barrier function, creating a composite structure that satisfies both contradictory requirements.
2Object-affected harmful factors
If separating plates are made very stiff to prevent cell propagation, then fire resistance is improved, but heat dissipation is prevented
Solution Approach 1:
The separating device changes the thermal conductivity parameter by using heat-conducting materials (such as aluminum or steel) instead of traditional insulating materials. This parameter change enables effective heat dissipation while maintaining fire resistance through the multi-element construction that provides thermal management pathways without compromising propagation barrier function.
Solution Approach 2:
The separating device uses composite construction with heat-conducting materials (such as aluminum or steel) combined with fire-resistant materials. The heat-conducting material provides thermal management and flexibility to handle expansion, while the fire-resistant material maintains propagation barrier function, creating a composite structure that satisfies both contradictory requirements.
3Temperature
If cooling channels are integrated within the separating plate, then heat dissipation is improved, but the channels can be damaged during cell expansion
Solution Approach 1:
The separating device is divided into multiple separating elements (first separating element, second separating element, and optionally third and fourth separating elements) arranged in series between battery cells. This segmentation allows each element to independently handle expansion forces while maintaining overall fire resistance, as each element can flex slightly without compromising the barrier function of the complete assembly.
Solution Approach 2:
The separating device changes the thermal conductivity parameter by using heat-conducting materials (such as aluminum or steel) instead of traditional insulating materials. This parameter change enables effective heat dissipation while maintaining fire resistance through the multi-element construction that provides thermal management pathways without compromising propagation barrier function.
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 device effectively dissipates heat and handles external forces, reducing the risk of cell propagation and fire damage by providing a robust, multifunctional solution that adjusts to pressure profiles and includes a burst opening for fluid release in critical conditions.
Implementation Method 1
The first separating element and the second separating element are formed from a heat-conducting material
Data Source
AI summary
A separating device for a battery module. The separating device includes a first separating element and a second separating element, which are arranged congruently with respect to one another and adjacent one another. The first separating element and the second separating element are formed from a heat-conducting material. Furthermore, the two separating elements enclose a chamber and the first separating element and the second separating element have embossments corresponding to one another for forming the chamber, wherein the embossments of the first separating element extend away from the second separating element and the embossments of the second separating element extend away from the first separating element.