Fuse Holder Segmentation for HV Battery Safety
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Solution Overview
Problem
High-voltage battery systems in electric vehicles pose risks of short circuits and electric shocks during fuse link installation or removal due to inadequate protection against accidental contact between fuse links and battery housings in existing fuse holders.
Innovation Solution
A fuse holder design with a bottom part and cover that secures fuse links using fastening screws and latching projections, allowing for safe and simple insertion or removal, preventing accidental contact and enabling measurement of electrical variables without compromising insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fuse links are secured in a receiving region with a busbar projecting into it, then fuse link exchange is made easier and fixing errors are reduced, but unintentional contact between the fuse link and battery casing cannot be completely excluded
Solution Approach 1:
The fuse holder is divided into two separate parts: a bottom part that receives the busbar and a cover that protects the fuse link. This segmentation isolates the fuse link from direct contact with the battery casing, eliminating the short circuit risk while maintaining easy exchangeability through the standardized receiving region.
Solution Approach 2:
The cover acts as an intermediary protective element between the fuse link and the external environment (battery casing). It provides insulation and physical separation, preventing harmful contact while allowing the fuse link to be securely held and easily replaced through the designed interface.
2Reliability
If fuse links are protected from external influences, then mechanical protection is improved, but access for measurement and maintenance becomes more difficult
Solution Approach 1:
The protective housing is segmented into a bottom part and a cover that can be easily separated. This allows the fuse link to be fully protected when assembled, while enabling quick access for measurement and maintenance by simply removing the cover, without requiring destruction or complex disassembly.
Solution Approach 2:
The cover is designed to be dynamically removable and reattachable, transforming the protective structure from a static barrier into a flexible access mechanism. This maintains reliable protection during operation while providing easy access when needed for measurement or maintenance activities.
Data Source
AI summary
A fuse holder (10) for a high-voltage system for accommodating an electric fuse link (13), comprising a bottom part (11) and a cover (12), which, when assembled, form a housing that serves to accommodate a fuse link (13). The fuse link (13) has two opposite terminal lugs (131), which can be fixed in the cover by means of fastening screws (14), so that, together with the cover (12), the fuse link (13) forms a unit, which is fastened on the bottom part (11) by means of the fastening screws (14).