Secondary Battery Pack Terminal Cover with Detachable Hooking Protrusion
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Solution Overview
Problem
Existing secondary battery packs face safety issues due to exposed electrode terminals, which can lead to short-circuits and fires when contacted by conductive materials, and current terminal cover mounting methods either provide strong coupling but are difficult to disassemble or offer weak coupling that risks component breakage.
Innovation Solution
A secondary battery pack design featuring a terminal cover with a hooking protrusion that engages with a stopper on the pack case, allowing for easy attachment and detachment using a cover separating jig, reducing terminal exposure and enhancing coupling force while preventing component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electrode terminal is exposed to the outside for easy connection, then the ease of operation is improved, but the reliability deteriorates due to short-circuit risks
Solution Approach 1:
The terminal cover is detachably mounted on the pack case, creating a nested structure where the cover can be removed for connection access and reattached for protection. This allows the system to transition between exposed and covered states, resolving the contradiction between ease of connection and short-circuit prevention.
2Strength
If the terminal cover is mounted in a bolting manner for strong coupling, then the strength is improved, but the ease of operation deteriorates due to repeated fastening and loosening
Solution Approach 1:
The coupling mechanism is segmented into a hooking protrusion on the terminal cover and a corresponding stopper on the pack case. This segmentation allows for simple snap-fit attachment and detachment while maintaining strong coupling force, eliminating the need for repeated fastening and loosening of bolts.
3Ease of operation
If the terminal cover is mounted in a hook manner for simple assembly, then the ease of operation is improved, but the strength deteriorates due to weak coupling force
Solution Approach 1:
The hooking protrusion is pre-formed on the terminal cover with a geometry designed to engage with the stopper on the pack case. This preliminary configuration ensures that when the cover is attached, the coupling force is automatically sufficient to prevent accidental detachment, while still allowing simple manual attachment and detachment.
Data Source
AI summary
A secondary battery pack according to an aspect of the present disclosure includes: a cell assembly including a plurality of secondary batteries; a pack case having an internal space for accommodating the cell assembly; an electrode terminal connected to the cell assembly and protruding to the outside of the pack case; and a terminal cover configured to cover an upper portion and partial side surfaces of the electrode terminal, and to be detachable from the pack case by including a hooking protrusion that is hook-coupled to and released from a stopper that is provided in the pack case. In particular, the terminal cover further includes a jig hole configured to allow a cover separating jig to be inserted from outside to inside, and the hooking protrusion is provided at an internal area of the terminal cover to be released from the stopper when the cover separating jig inserted through the jig hole pushes the hooking protrusion.