Stepped Secondary Battery Layout for Compact Board Integration
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Solution Overview
Problem
Secondary batteries with stepped regions do not efficiently reduce the combined size of the battery and board when connected, as the proportion of battery to board in electronic devices is not sufficiently minimized.
Innovation Solution
A secondary battery design featuring an exterior body with at least two adjacent step portions of different heights, allowing part of the board to be placed on the lower step portion, thereby reducing the overall size when integrated with the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a secondary battery having a stepped region is used, then the battery structure is improved, but the proportion occupied by the secondary battery and board in the electronic device is not sufficiently low
Solution Approach 1:
The exterior body is designed with multiple step portions at different height levels, creating a three-dimensional stepped structure. This dimensional variation allows the board to be positioned on the low step portion while the battery occupies the high step portion, thereby reducing the overall footprint and proportion occupied in the electronic device.
Solution Approach 2:
The exterior body is segmented into multiple step portions (high step portion and low step portion) with distinct functions. The high step portion houses the battery while the low step portion accommodates the board, separating the components vertically to reduce the combined area occupied.
2Area of stationary object
If the board is placed on the low step portion, then space utilization is optimized, but wiring length increases
Solution Approach 1:
The exterior body provides different local heights (quality) at different positions. The low step portion is specifically designed to accommodate the board at a lower height, while the high step portion houses the battery. This localized height differentiation optimizes space utilization while the wiring connects components within this compact stepped configuration.
Data Source
AI summary
A secondary battery including an electrode assembly having a positive electrode, a negative electrode, and a separator arranged between the positive electrode and the negative electrode, an electrolyte, and an exterior body housing the electrode assembly and the electrolyte. The exterior body has at least two step portions adjacent to each other and having top surfaces with different heights, the at least two step portions including a low step portion and a high step portion. A stepped surface is formed between the top surface of the low step portion and the top surface of the high step portion, and at least part of a board is arrangeable on the top surface of the low step portion.