Integrated Battery Case Layout for Compact Series Cell Assembly
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Solution Overview
Problem
Existing rechargeable batteries face challenges in miniaturization due to gaps between combined cells, and existing solutions for connecting lead terminals of different polarity in stacked power storage devices do not accommodate sealed electrode bodies within battery cases.
Innovation Solution
A battery case design with integrated storage units for two electrode bodies, featuring a first and second storage unit, external terminals, an intermediate terminal connecting the electrode terminals, and a lid, with the terminals arranged in a straight line on the case surface to reduce components and gaps, and an insulating cover for corrosion prevention and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple battery cells are combined to form an assembled battery, then the output voltage can be adjusted, but the volume increases due to gaps between cells
Solution Approach 1:
The patent combines two electrode bodies into a single battery case, merging what would traditionally be separate battery cells into one integrated unit. This eliminates the gaps between cells while maintaining the ability to achieve desired output voltages through series connection of electrode bodies within the same case.
Solution Approach 2:
The battery case serves multiple functions: it contains both electrode bodies, provides terminal connections for series configuration, and enables voltage adjustment without requiring separate cell housings. The single case structure performs what would traditionally require multiple separate cell assemblies.
2Reliability
If lead terminals of different polarity are connected using connecting members in stacked power storage devices, then electrical connection is achieved, but the configuration cannot accommodate sealed electrode bodies in battery cases
Solution Approach 1:
The patent introduces a terminal arrangement surface as an intermediary structure that facilitates electrical connections between electrode bodies while accommodating the sealed battery case design. This surface provides a standardized interface for terminal connections without requiring the electrode bodies to be exposed or unsealed.
3Volume of stationary object
If battery cells are miniaturized to reduce assembled battery volume, then compactness improves, but gaps between cells increase making miniaturization difficult
Solution Approach 1:
By merging multiple electrode bodies into a single battery case, the patent eliminates the gaps that would exist between separate cells. This approach achieves miniaturization not by reducing individual cell size but by removing the inter-cell spacing that traditionally increased overall volume.
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 design reduces the number of required battery cells, minimizes corrosion, enhances safety, and improves thermal dissipation, enabling a compact assembled battery with reduced resistance.
Implementation Method 1
an intermediate terminal which electrically connects a second electrode terminal of the first electrode body and a first electrode terminal of the second electrode body to each other
Data Source
AI summary
An aspect of a battery case according to the present disclosure includes: a lower case with a first storage unit in which a first electrode body is stored and a second storage unit in which a second electrode body is stored and which is provided adjacent to the first storage unit; a first external terminal to which a first electrode terminal of the first electrode body is connected; an intermediate terminal which electrically connects a second electrode terminal of the first electrode body and a first electrode terminal of the second electrode body to each other; and a second external terminal to which a second electrode terminal of the second electrode body is connected.