Battery Cell Protective Member for Pressing Portion Short-Circuit Isolation
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Solution Overview
Problem
The reliability of battery cells is compromised due to metal burrs on the pressing portion or external metal wires bridging between the pressing portion and exposed portions of the electrode terminals, leading to short-circuit faults.
Innovation Solution
A battery cell design incorporating an insulator and protective member with a protruding second protective portion that shields the pressing portion, preventing metal burrs or external metal wires from bridging with the electrode terminals, and a first insulating portion that insulates and separates the pressing portion and electrode terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pressing portion is used to fix the electrode terminals, then the electrode terminals are securely fixed on the wall portion, but metal burrs on the pressing portion or external metal wires may bridge between the pressing portion and exposed portions of the electrode terminals causing short-circuit faults
Solution Approach 1:
The patent introduces an insulator as an intermediary component positioned between the pressing portion and the electrode terminals. This insulator prevents direct contact between conductive parts, eliminating the short-circuit risk while preserving the fixing function. The insulator acts as a mediator that allows mechanical fixation without electrical connection.
Solution Approach 2:
The patent applies preliminary anti-action by pre-shielding the pressing portion with the insulator before any potential contact with metal burrs or external metal wires can occur. The insulator is positioned in advance to prevent the harmful bridging effect, countering the short-circuit risk before it can manifest.
2Volume of moving object
If the distance between the pressing portion and exposed portions of the electrode terminals is reduced, then the compactness of the battery cell is improved, but the risk of short-circuit faults increases due to metal burrs or external metal wires bridging
Solution Approach 1:
The insulator serves as a space-efficient intermediary that enables close positioning of the pressing portion and electrode terminals without creating short-circuit risks. The insulator's compact design allows minimal spacing while maintaining electrical isolation, achieving both compactness and reliability.
3Reliability
If an insulator is added between the pressing portion and electrode terminals, then the short-circuit risk is reduced, but the device complexity increases
Solution Approach 1:
The insulator is designed to perform multiple functions simultaneously: it provides electrical insulation to prevent short-circuits, serves as a mechanical support for the electrode terminals, and acts as a spacer to maintain proper positioning. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The patent merges the insulating function with the fixing and positioning functions into a single integrated insulator component. This consolidation eliminates the need for separate insulators, fasteners, and spacers, thereby reducing overall device complexity while maintaining reliability.
Data Source
AI summary
A battery cell is disclosed, including a housing, electrode terminals, and a protective member. The housing includes a wall portion and a fastener, where the fastener comprises a connecting portion and a pressing portion that together define a cavity. At least part of the electrode terminals is positioned within the cavity. The protective member includes a first protective portion covering the connecting portion and a second protective portion covering the pressing portion. The second protective portion extends beyond the pressing portion in a first direction. The structure reduces the likelihood of short circuits by shielding the pressing portion, thereby enhancing battery cell reliability.