Insulating Electrode Holder Stabilizing Power Storage Assembly
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Solution Overview
Problem
In power storage devices, dimensional differences between the outer can and electrode assembly lead to displacement, causing stress on current collecting tabs and reducing reliability due to inadequate fixation.
Innovation Solution
An insulating electrode assembly holder is used to sandwich the electrode assembly, providing contact with its surfaces and being fixed to the housing, which reduces displacement and stress on current collecting tabs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrode assembly is made smaller than the outer can to ensure workability during assembly, then the ease of manufacture is improved, but a space is generated between the outer can and electrode assembly, leading to displacement and reduced reliability
Solution Approach 1:
An insulating holder is introduced as an intermediary component between the outer can and the electrode assembly. The holder is fixed to the outer can and contacts the electrode assembly, filling the dimensional difference and preventing displacement while maintaining electrical insulation.
Solution Approach 2:
The insulating holder is nested within the outer can and surrounds the electrode assembly, creating a stable structure where the holder is fixed to the outer can and contacts the electrode assembly to prevent displacement.
2Ease of operation
If the electrode assembly is displaced with respect to the outer can, then the ease of operation is improved (allowing adjustment), but the current collecting tab is damaged and reliability deteriorates
Solution Approach 1:
The insulating holder acts as a mediator that prevents direct contact between the electrode assembly and the outer can, eliminating displacement while maintaining proper positioning and protecting the current collecting tab from damage.
3Device complexity
If no fixation structure is provided between the outer can and electrode assembly, then the device complexity is reduced, but the electrode assembly is easily displaced under applied force, reducing reliability
Solution Approach 1:
The insulating holder serves as a simple yet effective intermediary component that provides fixation between the outer can and electrode assembly, preventing displacement under applied force while maintaining electrical insulation and not requiring complex fixation structures.
Data Source
AI summary
A power storage device includes: a housing having a terminal arrangement part; a pair of output terminals provided in the terminal arrangement part; an electrode assembly housed in the housing; a pair of current collecting parts that electrically connect the electrode assembly and the pair of output terminals; and an insulating electrode assembly holder that has contact with a pair of first surfaces of the electrode assembly facing each other in first direction X in which the pair of current collecting parts are arranged, is fixed to the housing, and sandwiches the electrode assembly in first direction X.