Battery Unit With Cylindrical Can External Terminal
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Solution Overview
Problem
Existing battery units with a substrate and coin type secondary batteries cannot be used as a power source for devices with terminals, as the external electrodes are formed on one surface of the substrate, limiting their functionality.
Innovation Solution
A battery unit design where one of the cylindrical cans serves as an external terminal, eliminating the need for additional external terminals, with the substrate mounted on a flat surface and circuit components integrated to provide both positive and negative polarities, allowing the unit to function as a power source for devices with terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If external electrodes are formed on one surface of the substrate, then the battery unit can be constructed with integrated circuit components, but the battery cannot be used as a power source for devices with terminals requiring contact with exterior and sealing cans
Solution Approach 1:
The exterior can or sealing can is designed to serve dual functions: as the structural housing for the battery and as an external terminal for electrical connection. This multi-functionality allows the battery unit to be compatible with devices requiring terminal contact while maintaining the integrated substrate structure.
Solution Approach 2:
The external terminal function is extracted from the substrate surface and assigned to the can structure. By utilizing the can's outer surface as the contact point, the design eliminates the need for additional external terminal components while maintaining electrical connectivity functionality.
2Adaptability or versatility
If additional external terminals are formed on the substrate, then the battery unit can provide both positive and negative polarities, but the structure becomes more complex and circuit components may be exposed
Solution Approach 1:
The can structure serves multiple functions including housing, sealing, and providing external terminals for both polarities. This eliminates the need for separate terminal components on the substrate, reducing overall structural complexity while maintaining full functionality.
Solution Approach 2:
The external terminal function is merged with the can structure itself. The can's outer surface and specific features are designed to provide both positive and negative terminal contacts, combining structural and electrical functions into a single component.
3Ease of operation
If circuit components are mounted on the substrate surface facing outward, then external terminals can be formed, but the circuit components become exposed and vulnerable
Solution Approach 1:
The external terminal function is extracted from the substrate surface and assigned to the can structure. This allows circuit components to remain mounted on the substrate without exposure, as the can's outer surface provides the external contact points instead.
Solution Approach 2:
The substrate with mounted circuit components is nested within the can structure. The can serves as a protective outer shell that houses the substrate and its components, shielding them from environmental exposure while still providing external terminal access through the can's surface.
Data Source
AI summary
The battery unit (1) includes a flat battery (2) having a cylindrical positive electrode can (10) with a bottom and a cylindrical negative electrode can (20) with a bottom that covers an opening side of the positive electrode can and having a side wall of the positive electrode can on the opening side fitted to an outer circumferential surface of a side wall of the negative electrode can and a substrate (61) provided on a flat surface of one of the negative electrode can and the positive electrode can and mounted with circuit components (62) thereon. The other of the negative electrode can and the positive electrode can that has a flat surface on an opposite side to the substrate in a thickness-wise direction of the flat battery serves as an external terminal for one of a positive electrode and a negative electrode.