Battery Housing Recessed PCB Layout for Higher Energy Density
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Solution Overview
Problem
Existing battery structures waste space due to the placement of a protection circuit board opposite to the electrode post, leading to reduced energy density.
Innovation Solution
A battery design with a recessed portion in the housing to accommodate the circuit board, using conductive pieces to connect the circuit board to the electrode assembly, reducing overlap and optimizing space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the protection circuit board is disposed on the side of the housing opposite to the electrode assembly, then the circuit board can be easily connected to the electrode post, but the spacing between the housing and the circuit board becomes large, wasting space and reducing energy density
Solution Approach 1:
The circuit board is nested within a recessed portion of the housing, allowing it to be accommodated inside the housing structure rather than extending outward. This nesting approach enables the circuit board to be closely positioned to the electrode post while maintaining easy connection access, thereby improving space utilization without compromising manufacturing ease
Solution Approach 2:
The circuit board is positioned in a different spatial dimension by creating a recessed portion in the housing wall. This dimensional change allows the circuit board to be embedded within the housing structure, reducing the overall spacing and improving space utilization while maintaining connection accessibility through the recessed design
2Device complexity
If the circuit board is disposed opposite to the electrode post, then the connection structure is simple, but the overlap-connection between the electrical connecting piece and the base board causes space occupation
Solution Approach 1:
The connection structure is segmented into multiple conductive pieces with distinct functions: a first conductive piece for electrical connection and a second conductive piece for mechanical support. This segmentation allows each piece to be optimized for its specific function, reducing unnecessary overlap and space occupation while maintaining connection simplicity
Solution Approach 2:
A second conductive piece is introduced as an intermediary between the first conductive piece and the circuit board. This intermediary component provides mechanical support and positioning, allowing the first conductive piece to focus on electrical connection without requiring excessive overlap, thereby reducing space occupation while maintaining structural simplicity
Data Source
AI summary
A battery includes an electrode assembly, a housing, a first electrical connecting piece, and a circuit board assembly. The electrode assembly is accommodated in the housing. The housing includes a first recessed portion recessed toward the electrode assembly. The first electrical connecting piece and the first recessed portion are electrically connected to the electrode assembly separately. The circuit board assembly includes a base board, a first conductive piece, a second conductive piece, and a third conductive piece. The base board is disposed in the first recessed portion. The first conductive piece is electrically connected to the base board, and at least a part of the first conductive piece extends beyond the first recessed portion. The second conductive piece is electrically connected between the first conductive piece and the first electrical connecting piece. The third conductive piece is electrically connected between the first conductive piece and the first recessed portion.