Double-Bottomed Battery Pack Housing for Under-Floor Impact Protection
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Solution Overview
Problem
Battery packs installed under the floor of vehicles are prone to damage due to heavy loads and potential penetration from external collisions, which can compromise the integrity of the battery modules.
Innovation Solution
A double-bottomed design for the battery pack housing, featuring a metallic plate member and attachment members that distribute and absorb impact loads, preventing direct transmission to the battery modules and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the battery pack is disposed under the floor of a vehicle, then the vehicle compartment space is secured, but the battery modules are exposed to heavy loads and collision risks
Solution Approach 1:
The bottom of the housing is segmented into multiple regions: a first bottom part directly facing the battery modules, a second bottom part forming the outer bottom surface, and a reinforcement part connecting them. This segmentation allows the reinforcement part to absorb and disperse collision loads before they reach the battery modules, while maintaining the space-efficient under-floor configuration.
Solution Approach 2:
The reinforcement part is designed as a load-absorbing structure that is positioned between the external environment and the battery modules beforehand. When collision occurs, this reinforcement part absorbs the impact energy through its structural design, preventing the heavy load from being directly transmitted to the battery modules and ensuring their integrity.
2Reliability
If a reinforcement structure is added to protect battery modules, then the protection against heavy loads is improved, but the device complexity increases
Solution Approach 1:
The reinforcement part is merged with the housing structure itself rather than being a separate attachment. The reinforcement part forms an integrated bottom structure that combines the protective function with the housing's structural role, reducing the need for additional separate components and simplifying the overall device complexity.
Solution Approach 2:
The reinforcement part serves multiple functions simultaneously: it reinforces the housing bottom structure, absorbs collision loads, provides attachment points for mounting the battery pack to the vehicle, and maintains the spatial configuration for battery module installation. This multi-functionality reduces the need for separate components.
Data Source
AI summary
A battery pack includes: at least one battery module; a housing; and attachment members. The at least one battery module is housed in the housing. The attachment members are coupled to the housing, and attachable to a vehicle body. The housing is positioned under a floor of a vehicle. Each of the attachment members extends from a side of the housing to another side along a lower surface of the housing. Lower surfaces of the attachment members are coupled to a plate member. A lower portion of the battery pack has a double-bottomed part formed by the plate member and a bottom surface of the housing.