Prismatic Battery Cell Housing With Integrated Pressure Venting
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Solution Overview
Problem
Existing manufacturing processes for prismatic battery cell housings are complex and expensive, requiring separate insertion of bursting elements, which complicates the production and increases costs.
Innovation Solution
A hybrid, two-part battery cell housing design with a housing shell and base made of different materials and wall thicknesses, integrating a pressure compensation element directly into the housing base, allowing independent manufacturing and reducing production costs while meeting safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bursting elements are manufactured from different material and inserted separately, then the pressure equalization function is achieved, but the manufacturing complexity and production cost increase
Solution Approach 1:
The patent merges the bursting element with the housing base by integrating the pressure equalization function directly into the housing base structure. The housing base is designed with a bursting membrane that is part of its structure, eliminating the need for separate bursting element components and their insertion processes. This integration maintains the pressure equalization function while significantly simplifying the manufacturing process and reducing production complexity.
2Reliability
If bursting elements are manufactured from different material and inserted separately, then the pressure equalization function is achieved, but the production cost increases
Solution Approach 1:
The patent combines the housing base and bursting element into a single integrated component. The housing base is manufactured as one piece with the bursting membrane already formed as part of its structure, eliminating the need for separate manufacturing and assembly steps. This integration reduces production costs by simplifying the manufacturing process and reducing the number of components and assembly operations required.
Solution Approach 2:
The housing base is designed to serve multiple functions: it provides structural support for the battery cell and simultaneously incorporates the pressure equalization function through its integrated bursting membrane. This multi-functionality eliminates the need for separate bursting element components, reducing both manufacturing complexity and production cost while maintaining the required safety function.
3Adaptability or versatility
If housing shell and housing base are made of different materials, then the respective requirements for components are met, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies local quality by making the housing base with a different material composition than the housing shell. The housing base is specifically designed with material properties optimized for pressure equalization function, while the housing shell uses material optimized for structural protection. This localized material differentiation allows each component to meet its specific functional requirements while the integration of the bursting element into the housing base simplifies the overall structure.
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 design enables quick, cost-effective manufacturing of battery cell housings with integrated pressure compensation elements, ensuring rapid and effective pressure equalization during critical situations without increasing production complexity.
Implementation Method 1
pressure equalization must occur in a timely manner. Valves or burst elements are typically installed in the battery cell housing as pressure equalization elements
Implementation Method 2
A pressure compensation element is integrated into the housing base and is defined by at least one region whose material thickness is reduced compared to a region immediately adjacent to it
Data Source
Figure 1~2
Figure 3~4
AI summary
A battery cell housing (10) for a prismatic battery cell (12) is shown, comprising a housing shell (14) and a housing base (16) designed as a separate part. A pressure compensation element (30) is integrated into the housing base (16), which is defined by at least one region whose material thickness is reduced compared to a region immediately adjacent to it. The housing shell (14) and the housing base (16) are made of different materials and differ in their wall thickness. A battery cell (12) is also shown.