Battery Cell Adhesive Bond Gradients for Ageing Stress Control
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Solution Overview
Problem
Existing methods for forming connections between battery cells lack the ability to create a material bond with adaptable robustness, flexibility, and thermal conductivity, which are essential for optimizing the performance and longevity of battery modules, particularly as cells age.
Innovation Solution
A method involving the application of an adhesive with varying proportions of components to form an inhomogeneous material bond between battery cells, allowing for gradients in properties like adhesive force, thermal conductivity, hardness, and elasticity, and enabling the bond to be tailored to specific requirements through the selection and mixing of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform adhesive bond is formed between battery cells, then the connection is simple to manufacture, but the robustness, flexibility, and thermal conductivity cannot be optimized for ageing behaviour
Solution Approach 1:
The patent applies different proportions of adhesive components in different regions of the battery cell connection. Specifically, the adhesive mixture varies the ratio of first component to second component across the connecting plane, creating local variations in adhesive properties such as robustness, flexibility, and thermal conductivity tailored to specific regions' requirements.
Solution Approach 2:
The patent changes the chemical composition parameters of the adhesive by varying the proportions of first and second components across different regions. This parameter variation allows optimization of adhesive properties (robustness, flexibility, thermal conductivity) in different areas without changing the fundamental adhesive system.
2Adaptability or versatility
If an inhomogeneous material bond is formed with varying component proportions, then the adhesive properties can be optimized for different regions, but the manufacturing process becomes more complex
Solution Approach 1:
The patent prepares the adhesive mixture with predetermined variations in component proportions before application. By pre-mixing the adhesive components in the desired non-uniform distribution pattern, the complex inhomogeneous structure is created in advance, simplifying the actual application process while maintaining adaptability to ageing behaviour.
3Manufacturing precision
If the adhesive components are mixed before application, then the ratio of components can be precisely controlled, but an additional mixing device is required
Solution Approach 1:
The patent controls the ratio parameters of adhesive components through the mixing process. By systematically varying the proportions of first and second components in different regions during mixing, precise control over the final adhesive composition is achieved, enabling optimization of adhesive properties for different connection regions.
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 approach allows for the creation of a material bond with optimized robustness, flexibility, and thermal conductivity, reducing stress and deformation, and enabling the formation of desired gradient patterns, thus enhancing the performance and lifespan of battery modules.
Implementation Method 1
The at least one first component of the adhesive and the at least one second component of the adhesive are expediently mixed with one another before the application.
Implementation Method 2
an adhesive is applied to the first battery cell... the first battery cell is connected to the second battery cell in such a way that an inhomogeneous material bond is formed
Data Source
AI summary
A method for forming a connection between a first battery cell (1) and a second battery cell (2), wherein, in a first method step, an adhesive (3) comprising at least one first component (31) and at least one second component (32) is applied to the first battery cell (1), wherein a first proportion (41) of the at least one first component (31) and/or a second proportion (42) of the at least one second component (32) is changed during the application of the adhesive (3) over the first battery cell (1), wherein, in a second method step, the first battery cell (1) is connected to the second battery cell (2) in such a way that an inhomogeneous material bond is formed between the first battery cells (1) and the second battery cell (2).