Power Storage Housing Layout for Impact Load Redirection
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Solution Overview
Problem
Conventional power storage devices face challenges in reducing size while preventing impact forces from being transmitted to the power storage module and electronic devices, often resulting in increased size and potential damage during collisions.
Innovation Solution
The power storage device incorporates a protection unit with a load receiving member, load transmitting members, and a reinforcing member, arranged to overlap with the second housing and connected to the first housing in a manner that disperses impact forces to the ends, enhancing rigidity and preventing damage to the power storage module and electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the junction box is disposed adjacent to the power storage module in the housing case, then the protection of the electronic device is improved, but the length of the housing case and the entire power storage device becomes greater
Solution Approach 1:
The protection unit is disposed to overlap with the second housing in the second direction (vertical direction), changing the spatial arrangement from horizontal side-by-side to vertical stacking. This dimensional change allows the protection structure to occupy vertical space rather than horizontal space, reducing the length of the housing case while maintaining protection functionality
Solution Approach 2:
The protection unit is divided into distinct functional components: a load receiving member that receives impact loads, load transmitting members that transmit the loads to the first housing, and a reinforcing member that reinforces the load transmitting members. This segmentation allows each component to be optimized for its specific function while collectively providing protection in a compact arrangement
2Strength
If the cross section of the housing case is increased to ensure sufficient buckling strength, then the strength of the housing case is improved, but the volume of the power storage device becomes greater
Solution Approach 1:
The reinforcing member is disposed at a central position of the housing case specifically where impact loads are most likely to be applied, rather than uniformly increasing the cross section throughout. This localized reinforcement provides sufficient buckling strength at the critical location while maintaining a compact overall volume
Solution Approach 2:
The protection unit combines multiple structural elements (load receiving member, load transmitting members, and reinforcing member) made of materials with high strength-to-weight ratios, creating a composite protection structure that achieves high buckling strength without increasing the overall volume of the power storage device
3Strength
If a reinforcing member is disposed at a central position of the housing case, then the strength of the housing case is improved, but the power storage module must be divided into multiple components increasing the total size
Solution Approach 1:
The protection unit is extracted as a separate, independent structure from the power storage module. The reinforcing member is part of the protection unit rather than the housing case itself, allowing the power storage module to remain as a single integrated component while the protection unit provides centralized reinforcement
4Reliability
If the first housing and second housing are arranged side by side, then the protection of the electronic device is improved, but the physical size of the power storage device is reduced compared to placing the second housing inside the first housing
Solution Approach 1:
The protection unit overlaps with the second housing in the vertical direction (second direction) rather than placing the second housing inside the first housing horizontally. This vertical stacking arrangement provides protection while optimizing the physical footprint and volume of the power storage device
Data Source
AI summary
The power storage module is housed in the first housing. The electronic device is housed in the second housing. The protection unit protects the second housing. The protection unit is disposed to overlap with the second housing in a second direction orthogonal to a first direction in which the first housing and the second housing are arranged side by side. The protection unit includes a load receiving member, a pair of load transmitting members, and a reinforcing member. The pair of load transmitting members is disposed to face each other in a third direction orthogonal to the first direction and the second direction in such a manner that a distance between the pair of load transmitting members increases from the load receiving member toward the first housing.