Vehicle Battery Case Fastening for Moisture-Sealed Assembly
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Solution Overview
Problem
Conventional vehicle power supply devices require multiple parts, including bolts, nuts, and gaskets, increasing costs and complexity, as they need different specifications to address varying moisture permeation requirements across regions, making them inefficient and costly to manufacture.
Innovation Solution
A vehicle power supply device design that uses a rivet to connect the case and support, omitting the need for a nut, and incorporates a bolt for sealing in regions with high moisture permeation, allowing a single structure to be universally applicable and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the combination of bolt and nut is adopted as fixing means and sealing member is provided, then the device is sufficiently fastened and sealed to prevent moisture permeation, but the number of parts increases and cost is increased
Solution Approach 1:
The patent extracts and removes unnecessary parts from the conventional bolt-nut-gasket assembly. By using a rivet that integrates both fixing and sealing functions into a single component, the nut and separate gasket are eliminated, reducing the number of parts while maintaining moisture prevention capability.
Solution Approach 2:
The rivet combines multiple functions into a single component: it provides mechanical fastening (replacing bolt and nut) and sealing (replacing gasket). This merging of functions reduces part count while maintaining both structural integrity and moisture protection.
2Adaptability or versatility
If different specifications are manufactured to cope with different moisture permeation requirements in different regions, then the device meets regional requirements, but the cost is still unable to be reduced effectively
Solution Approach 1:
The rivet design creates a universal component that can be used across different regions and applications. A single rivet specification replaces the need for multiple bolt-nut-gasket combinations, enabling the same part to serve both low-moisture and high-moisture environments while simplifying manufacturing and inventory management.
3Device complexity
If rivet is adopted as fixing means to omit the use of nut, then the number of parts is reduced, but the specification for adopting bolt is different from the specification for adopting rivet
Solution Approach 1:
The rivet is designed as a single-use, non-removable fastening component that is simpler and more cost-effective than reusable bolt-nut assemblies. While rivets are traditionally used where disassembly is not required, this application accepts the trade-off for significant reductions in part count and manufacturing complexity.
Data Source
AI summary
Provided is a vehicle power supply device able to be fixed easily, at a reduced cost, and universally applicable. The vehicle power supply device includes: a case; a battery, disposed in the case; a cover, covering the case; a support, supporting the battery and connected with the cover; and a rivet, connecting the case and the support. A side surface of the case is provided with a case side hole penetrating into the case. The support is provided with a support side hole corresponding to the case side hole. The rivet is inserted into the case side hole and the support side hole to connect the case and the support. The cover is provided with a cover side hole connected with the case by using a bolt.