Battery Pack Mounting Bushing for Stable Sealing Under Impact
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Solution Overview
Problem
Existing vehicle battery pack mounting structures fail to maintain a stable sealing function when subjected to external impacts, which can lead to moisture or foreign matter entering the battery pack, compromising its durability and stability.
Innovation Solution
A vehicle battery pack mounting structure that includes a coupling bolt penetrating through the battery pack and a mounting bushing accommodating the coupling bolt, along with lower and upper fixation nuts and sealing members, to maintain a constant interval between the battery pack's casing and cover and provide a sealing function even under external impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a coupling bolt penetrates through the battery pack to mount it to the vehicle body, then the battery pack can be firmly mounted, but the sealing function may be compromised when external impacts occur
Solution Approach 1:
The patent introduces a mounting bushing as an intermediary component between the coupling bolt and the battery pack casing. The bushing accommodates the coupling bolt and maintains a constant interval between the lower casing and upper cover, preventing direct contact and potential damage to the sealing structures while still enabling firm mounting through the bolt.
Solution Approach 2:
The patent divides the mounting structure into separate functional components: the coupling bolt for mounting, the mounting bushing for maintaining interval and guiding the bolt, and separate sealing members for sealing. This segmentation allows each component to perform its specific function without compromising the others, particularly protecting the sealing function from mounting-related damage.
2Strength
If fastening force is applied to the coupling bolt to secure the battery pack, then the mounting becomes firm, but the interval between lower casing and upper cover may vary compromising sealing
Solution Approach 1:
The mounting bushing acts as a mediator that absorbs and distributes the fastening force from the coupling bolt. It maintains a constant interval between the lower casing and upper cover even when the coupling bolt is tightened, preventing deformation or displacement that would compromise the sealing function.
Solution Approach 2:
The mounting bushing is designed with specific dimensional parameters that ensure it maintains a constant interval between the lower casing and upper cover. The bushing's geometry and material properties are optimized to maintain this interval stability under various fastening forces and external conditions.
3Device complexity
If traditional mounting methods are used without dedicated sealing components, then the device complexity is reduced, but moisture or foreign matter can enter the battery pack during external impacts
Solution Approach 1:
The mounting bushing serves as an intermediary sealing component that prevents moisture and foreign matter from entering through the mounting hole. It creates a sealed path for the coupling bolt while blocking harmful substances, adding minimal complexity but providing effective protection.
Solution Approach 2:
The patent uses sealing members (which can be rubber or elastomeric materials) that form flexible sealing barriers between the mounting bushing and the battery pack casing. These flexible sealing elements conform to the mating surfaces and maintain effective seals even under vibration and impact conditions.
Data Source
AI summary
A vehicle battery pack mounting structure includes: a coupling bolt coupled to a vehicle body through a battery pack; a mounting bushing accommodating the coupling bolt therein and coupled to the battery pack; a lower fixation nut fixing a lower portion of the mounting bushing to the lower casing; an upper fixation nut fixing an upper portion of the mounting bushing to the upper cover; and a lower sealing member. The lower sealing member is configured to seal between the mounting bushing and the lower casing in response to fastening of the lower fixation nut. In addition, the vehicle battery pack mounting structure further includes an upper sealing member configured to seal between the mounting bushing and the upper cover in response to fastening of the upper fixation nut. The vehicle battery pack mounting structure also includes a vehicle body side sealing member sealing between the upper fixation nut and the vehicle body in response to the fastening of the coupling bolt.