Electricity Storage Cell Case Projections Against Unit Displacement

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Solution Overview

Problem

Existing electricity storage cells experience displacement of cell units relative to the cell case due to vibrations or other causes, which can lead to instability and potential damage.

Innovation Solution

The electricity storage cell incorporates a position defining portion with an intermediate projection and corner projection inside the cell case to restrain the displacement of cell units, utilizing an adhesive member to secure the cell units in place.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cell units are housed in the cell case without position defining portions, then the cell case has simple structure and easy manufacture, but the cell units can be displaced relative to the cell case due to vibrations or other causes

Engineering Contradiction:

Improvestability of cell unitsVSAvoidstructure of cell case

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The position defining portion is divided into multiple functional elements: corner projections at the vertices of the cell case and an intermediate projection between the cell units. This segmentation allows each projection to perform specific positioning functions, preventing displacement while maintaining a relatively simple overall structure that integrates seamlessly with the cell case.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The intermediate projection acts as an intermediary element positioned between the cell units to prevent their relative displacement. This intermediary structure mediates the interaction between the cell units and the cell case, providing stable positioning without requiring complex fastening mechanisms or modifying the cell units themselves.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If position defining portions are added to the cell case, then displacement of cell units is restrained, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvepositioning accuracy of cell unitsVSAvoidmanufacturing process of cell case

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The position defining portions (corner projections and intermediate projection) are merged with the cell case as integral structures rather than separate components. This combining approach allows the positioning function to be achieved through the cell case structure itself, eliminating the need for separate positioning parts and simplifying the manufacturing process while ensuring reliable positioning.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250323385A1Electricity storage cell

Publication Date: 2025.10.16 TOYOTA JIDOSHA KK

AI summary

An electricity storage cell includes a pair of cell units connected to each other, a cell case that houses the cell units, and a position defining portion that defines positions of the cell units relative to the cell case, the position defining portion being provided inside the cell case. The position defining portion includes an intermediate projection projecting from the cell case toward a position between the cell units.