Recessed Battery Package Layout for Compact Module Assembly
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Solution Overview
Problem
Existing technologies face challenges in performing surface mount technology of cylinder-type batteries on mounting substrates due to the linear lead terminal, leading to complex assembly and potential size increases of the battery module.
Innovation Solution
A battery package with an insulating substrate having a recessed portion to accommodate the battery, where the lead terminals are bent and electrically connected to electrodes on the inner side surface of the recessed portion, allowing for reduced size and improved assemblability of the battery module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the linear lead terminal of the cylinder-type battery is placed on the electrode of the package for surface mount technology, then the battery can be mounted on the mounting substrate, but the assembly becomes complicated and the battery module size increases
Solution Approach 1:
The patent transitions from a planar mounting approach to a three-dimensional configuration by placing electrodes on the inner side surface of the recessed portion. This vertical arrangement on the recessed portion's inner wall allows lead terminals to connect in a bent state, reducing the horizontal footprint and overall module size while maintaining ease of assembly.
Solution Approach 2:
The recessed portion creates a nested structure where the battery is accommodated within the recess, and the electrodes are positioned on the inner side surface of this recessed space. This nesting arrangement optimizes space utilization and reduces the external dimensions of the battery module.
2Device complexity
If the linear lead terminal is used for mounting, then the battery structure remains simple, but height adjustment of bonding portions is required increasing assembly complexity
Solution Approach 1:
The lead terminals are pre-bent into the necessary configuration before assembly. This preliminary action eliminates the need for height adjustments during the bonding process, as the bent lead terminals naturally conform to the required positioning on the electrodes located on the recessed portion's inner side surface.
Solution Approach 2:
Instead of placing electrodes on the top surface and requiring lead terminals to reach upward, the patent inverts the arrangement by placing electrodes on the inner side surface of the recessed portion. This allows the bent lead terminals to connect naturally without requiring additional height adjustment steps.
3Volume of moving object
If electrodes are placed on the inner side surface of the recessed portion, then the battery module size is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process is segmented into distinct steps: first forming the recessed portion on the insulating substrate, then separately forming the electrodes on the inner side surface of the recessed portion, and finally assembling the battery with pre-bent lead terminals. This segmentation allows each step to be optimized independently, managing manufacturing complexity while achieving compact dimensions.
Data Source
AI summary
To reduce the size of a battery module while improving assemblability of the battery module. A battery package includes an insulating substrate having a first surface, a second surface located opposite to the first surface, and a recessed portion. The battery package includes a first external electrode located on the second surface and a second external electrode located on the second surface. The battery package includes a first electrode located on an inner side surface of the recessed portion and electrically connected to the first external electrode, and a second electrode located on the inner side surface of the recessed portion and electrically connected to the second external electrode.