Electricity Storage Module Bus Bar Positioning via Resin Frame Biasing
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Solution Overview
Problem
Existing electricity storage modules face challenges in accommodating deviations in the attachment positions of bus bar modules relative to batteries, leading to insufficient relative displacement and positioning precision.
Innovation Solution
The proposed solution involves an electricity storage module with resin frames that retain a bus bar case, which includes a biasing portion to securely position bus bars between electricity storage cells, enhancing both the bus bar module's positioning precision and the bus bars' positional accuracy within the case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bus bar module is attached to the batteries without additional positioning structures, then the device complexity is reduced, but the positioning precision of the bus bar module relative to the batteries deteriorates
Solution Approach 1:
The patent introduces resin frames as intermediary components between the bus bar module and batteries. These resin frames include retaining portions that engage with retained portions on the bus bar case, serving as a mediating positioning structure that ensures precise alignment without requiring complex direct attachment mechanisms between the bus bar module and batteries
Solution Approach 2:
The positioning function is segmented into multiple components: the resin frames are disposed between pairs of adjacent batteries, and each resin frame has retaining portions that work with retained portions on the bus bar case. This segmentation allows the positioning task to be distributed across multiple simple structures rather than requiring a single complex positioning mechanism
2Manufacturing precision
If the bus bar case is retained by the resin frame with engageable portions, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The resin frame combines multiple functions into a single component: it provides structural support between batteries, positions the bus bar case through engageable portions, and maintains the relative positions of adjacent battery pairs. This merging of functions into one component achieves precise positioning without requiring multiple separate positioning mechanisms
3Manufacturing precision
If the bus bar case includes a biasing portion to bias the bus bar toward the retained portion, then the positioning precision of the bus bar within the case is improved, but the device complexity increases
Solution Approach 1:
The biasing portion changes the physical state or parameter of the bus bar positioning by applying a continuous biasing force that pushes the bus bar toward the retained portion. This parameter change (from static to dynamically biased positioning) ensures accurate electrical connections without requiring complex mechanical constraints or adjustment mechanisms
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 configuration improves the positioning precision of the bus bar module with respect to the electricity storage cells and the bus bars within the case, ensuring accurate electrical connections and enhanced module stability.
Implementation Method 1
a biasing portion configured to bias the bus bar toward a side of the retained portion, in a state in which the retained portion is engaged with the retaining portion
Data Source
AI summary
An electricity storage module includes a plurality of electricity storage cells, a plurality of resin frames, and a bus bar module. Each of the electricity storage cells includes a pair of external terminals. The bus bar module includes a plurality of bus bars and a bus bar case. The resin frame includes a retaining portion configured to retain the bus bar case. The bus bar case includes a retained portion that is configured to engage with the retaining portion, and a biasing portion that is configured to bias the bus bar toward a side of the retained portion, in a state in which the retained portion is engaged with the retaining portion.