Power Storage Module Layout to Cut Restraint Mass
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Solution Overview
Problem
Existing power storage devices experience a significant increase in mass due to the enlargement of electrodes, leading to a corresponding increase in the mass of the restraint portion.
Innovation Solution
A power storage device design featuring a stack of power storage modules with conductive members and restraint members, where an adhesive member bonds the modules and conductive members, and includes overlapping and non-overlapping regions to ensure electrical conduction and fixation while minimizing the mass of the restraint members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electrode size in each power storage module is increased, then the power storage capacity is improved, but the mass of the restraint portion increases remarkably
Solution Approach 1:
The electrode is divided into multiple electrode pieces (first electrode piece and second electrode piece) that are arranged in a specific pattern with spacing between them. This segmentation allows the electrode to provide sufficient active material for power storage while reducing the overall electrode area that requires restraint, thereby decreasing the mass of the restraint portion.
Solution Approach 2:
The electrode pieces are selectively positioned to create different local densities and functions within the power storage module. The first and second electrode pieces are arranged with specific spacing to optimize both power storage capacity in critical areas while minimizing restraint requirements in less critical areas.
2Quantity of substance
If the electrode size is increased to improve power storage, then the device capacity is improved, but the overall device size increases
Solution Approach 1:
By segmenting the electrode into multiple pieces with spacing between them, the design achieves high power storage capacity through optimized material distribution rather than simply increasing overall electrode area, thus avoiding proportional increases in device volume.
Solution Approach 2:
The electrode pieces are arranged in a spatial configuration that utilizes three-dimensional space more efficiently. The stacked arrangement with spacing allows for better volume utilization, achieving high capacity without linearly increasing device dimensions.
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
The design reduces the mass and outer shape of the power storage device while maintaining effective electrical conduction and fixation between modules, ensuring reliable operation even as module size increases.
Implementation Method 1
an adhesive member that bonds the power storage module and the conductive member
Data Source
AI summary
A power storage device includes: a plurality of power storage modules; a conductive member; a pair of restraint members; and an adhesive member. Each power storage module includes: an overlapping region that overlaps with the pair of restraint members in a stacking direction; and a non-overlapping region that does not overlap with the pair of restraint members in the stacking direction. Each power storage module includes: a direct contact region that is in direct contact with the conductive member; and an indirect contact region that is in contact with the power storage module adjacent to that power storage module or the conductive member, with the adhesive member interposed therebetween. The overlapping region includes the direct contact region, and the non-overlapping region includes the indirect contact region.