Rechargeable Battery Case with Recess Portions for Heat Dissipation
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Solution Overview
Problem
Rechargeable batteries face issues with unnecessary space inside the case leading to decreased electrolyte absorption and increased manufacturing costs, as well as inefficient heat dissipation due to the presence of a cell barrier member in modules.
Innovation Solution
The design incorporates recess portions at the edges of the case to reduce internal space, allowing for improved electrolyte absorption and elimination of the cell barrier member, facilitating better heat dissipation by using a coupling member that fits into these recessions to hold unit cells together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional case design is used without recess portions, then the case structure is simple, but unnecessary space is formed inside the case causing decreased electrolyte absorption rate
Solution Approach 1:
The case is segmented by forming recess portions at its edges, dividing the internal space into functional regions. This segmentation eliminates unnecessary space while maintaining structural integrity, allowing the electrolyte to be properly absorbed by the electrode assembly without requiring a completely redesigned case structure.
2Reliability
If a cell barrier member is used between neighboring rechargeable batteries, then battery isolation is achieved, but manufacturing cost increases and heat dissipation efficiency decreases
Solution Approach 1:
The cell barrier member is extracted and removed from the module design. Instead of using separate barrier components between batteries, the recess portions in the case structure itself provide the necessary isolation and positioning functions, eliminating the need for additional barrier members and reducing manufacturing cost.
Solution Approach 2:
The case structure is given multiple functions: it not only houses the electrode assembly and electrolyte but also provides battery isolation and positioning through its recess portions. This multi-functionality eliminates the need for separate cell barrier members, reducing component count and manufacturing complexity.
3Reliability
If a cell barrier member is used between neighboring rechargeable batteries, then battery isolation is achieved, but heat dissipation efficiency of the case decreases
Solution Approach 1:
The cell barrier member that impeded heat dissipation is extracted and removed. The recess portions in the case provide necessary battery isolation without creating thermal barriers, allowing heat to dissipate efficiently from the battery module.
4Quantity of substance
If unnecessary space is not reduced in the case, then manufacturing is simpler, but electrolyte solution collects at the bottom causing decreased absorption rate
Solution Approach 1:
The case interior is segmented by recess portions that guide electrolyte distribution. This prevents electrolyte collection at the bottom by creating defined spaces that promote uniform absorption across the electrode assembly, achieving proper electrolyte distribution with minimal design changes.
Data Source
AI summary
A rechargeable battery includes: an electrode assembly; a case accommodating the electrode assembly and an electrolyte solution and defining recess portions at edges of the case; a cap plate at an opening of the case; and electrode terminals in the cap plate and coupled to the electrode assembly.