Energy Storage Container With Asymmetric Protrusion For Terminal Alignment
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Solution Overview
Problem
Conventional energy storage elements face challenges in maintaining air-tightness and manufacturing efficiency due to the difficulty in aligning non-circular electrode terminals with through-holes, leading to increased costs and complexity in insulation sealing processes.
Innovation Solution
The design incorporates a container with protrusion and recess parts that allow for tilted inner and outer surfaces, enabling easier alignment and contact of insulation members, thereby enhancing air-tightness and reducing manufacturing complexity by matching the container shape to the electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional insulation sealing members are used to cover through-holes in the container cap, then air-tightness and insulation are achieved, but manufacturing complexity and cost increase due to difficulty in aligning non-circular electrode terminals with through-holes
Solution Approach 1:
The container cap is designed with an asymmetric protrusion part that corresponds to the non-circular shape of the electrode terminal. This asymmetric structure enables easy alignment between the terminal and the through-hole, eliminating the manufacturing complexity associated with aligning non-circular components while maintaining the air-tightness function.
Solution Approach 2:
The protrusion part acts as an intermediary alignment feature between the electrode terminal and the through-hole. By providing this intermediate structural element, the design facilitates straightforward positioning and assembly without requiring complex alignment procedures, thus reducing manufacturing complexity while preserving sealing reliability.
2Reliability
If conventional pressure-bonding connection parts are used to connect electrode terminals and current collectors, then electrical connection is achieved, but manufacturing tolerance becomes difficult to control
Solution Approach 1:
The protrusion part is pre-formed on the container cap to provide a predetermined alignment position. This preliminary structural feature ensures that the electrode terminal and current collector are automatically positioned correctly during assembly, making the manufacturing process less sensitive to tolerance variations and improving overall manufacturing precision.
Solution Approach 2:
The asymmetric protrusion structure enables the components to self-align during assembly. The geometry of the protrusion part naturally guides the electrode terminal into the correct position, eliminating the need for precise external alignment procedures and reducing the impact of manufacturing tolerances on electrical connection reliability.
3Productivity
If through-holes are formed in the container cap for connection parts, then electrical energy extraction is enabled, but insulation and sealing become more difficult
Solution Approach 1:
The container cap is designed with localized structural features: the protrusion part provides alignment and sealing at the specific location of the through-hole, while the rest of the cap maintains its insulating properties. This localized approach enables energy extraction through the through-hole without compromising the overall insulation and sealing performance of the container.
Data Source
AI summary
An energy storage element includes a container that includes a container body including an opening and a cap part formed on the opening, an electrode assembly housed in the container, an electrode terminal, and a current collector which electrically connects the electrode terminal and the electrode assembly. The cap part of the container includes an outer surface including a protrusion part formed to protrude outward from the outer surface, and an inner surface including a recess part formed at a position corresponding to a position of the protrusion part.