Battery Case Reinforcing Members Absorb Crash Forces
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Solution Overview
Problem
In moving conveyances, power storage units mounted between seats can be damaged during a crash due to the movement of frame members, which compromises passenger safety and the integrity of the power storage unit.
Innovation Solution
Incorporating reinforcing members with higher strength than the battery module components, arranged at a predetermined spacing crossing the transverse direction, to absorb external forces and prevent deformation of the battery case towards the battery cells when frame members move during a crash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power storage unit is disposed between seats with frame members, then passenger safety is improved through seat rod protection, but the power storage unit may be damaged by frame member movement during crash
Solution Approach 1:
The patent introduces a protective structure comprising reinforcing members and cushioning members as intermediaries between the frame members and the power storage unit. The reinforcing members prevent excessive deformation of the battery case, while the cushioning members absorb impact energy, thereby protecting the power storage unit from damage caused by frame member movement during crash while maintaining the original seat safety function.
Solution Approach 2:
The patent applies beforehand cushioning by providing cushioning members positioned between the frame members and the power storage unit. These cushioning members are prepared in advance to absorb impact energy when crash occurs, preventing the frame members from directly damaging the power storage unit while maintaining the seat rod's protective function for passengers.
2Object-affected harmful factors
If reinforcing members are added to the battery module, then protection against frame member movement is improved, but device complexity increases
Solution Approach 1:
The patent segments the protective function into two distinct components: reinforcing members that prevent battery case deformation and cushioning members that absorb impact energy. This segmentation allows each component to perform its specific protective function efficiently while maintaining a relatively simple overall structure, avoiding the need for a single complex protective mechanism.
Solution Approach 2:
The patent employs composite materials by combining reinforcing members (providing structural strength) and cushioning members (providing energy absorption) in the protective structure. This composite approach achieves comprehensive protection against frame member movement while keeping the individual components simple and the overall device complexity manageable.
Data Source
AI summary
A power storage unit includes a battery module housed in a battery case. The battery module has, as components, a plurality of battery cells stacked and arranged in a direction (direction Y) crossing a transverse direction. Reinforcing members arranged at a predetermined spacing are provided between the battery cells. The power storage unit of this structure can prevent damage to the power storage unit disposed between seats adjacent to each other in the transverse direction, when frame members provided in the seats are moved in the transverse direction in the event of a crash of a moving conveyance.