Solid-State Battery Same-Surface Terminal Design
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Solution Overview
Problem
Conventional solid-state batteries face challenges in accommodating their external terminals within limited battery housing spaces and surface mounting applications, where expansion due to charging and discharging can lead to contact with substrates, causing failures.
Innovation Solution
The solid-state battery design features both positive and negative electrode external terminals positioned on the same surface of the battery laminate, allowing for more flexible installation in confined spaces and preventing contact with substrates during expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external terminals are arranged on opposite surfaces of the battery laminate, then electrical connection is simplified, but the battery cannot be properly installed in limited housing spaces or on substrates
Solution Approach 1:
The patent transitions from a three-dimensional opposite-surface terminal arrangement to a two-dimensional same-surface arrangement. By positioning both external terminals on the same surface of the battery laminate, the invention enables surface mounting on substrates while maintaining electrical connection functionality, thus resolving the contradiction between connection simplicity and installation adaptability.
2Volume of moving object
If the battery is mounted on a substrate for surface mounting, then space utilization is improved, but expansion during charging/discharging causes contact with the substrate leading to failure
Solution Approach 1:
By arranging both external terminals on the same surface, the battery's thickness dimension is reduced, allowing it to be mounted flush on substrates. This dimensional change prevents the battery from protruding and contacting the substrate during expansion, thereby maintaining mounting reliability while improving space utilization.
3Volume of stationary object
If the battery housing space is limited, then device compactness is improved, but conventional terminal arrangements cannot be accommodated
Solution Approach 1:
The invention repositions external terminals from opposite surfaces to the same surface, reducing the battery's effective height requirement. This allows the battery to fit into limited housing spaces while maintaining easy terminal installation and electrical connection, thus resolving the contradiction between compactness and installation ease.
Data Source
AI summary
A solid-state battery including a solid-state battery laminate having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer; and a positive electrode external terminal connected to the positive electrode layer and a negative electrode external terminal connected to the negative electrode layer are on a same surface of the solid-state battery laminate.