Battery Pack Connection Board with Position Fixing Bridges
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Solution Overview
Problem
Existing battery packs face challenges in establishing a stable and secure electrical connection between multiple unit cells, particularly in medium or large devices requiring high power and capacity, which can lead to short circuits and misalignment issues.
Innovation Solution
A battery pack design featuring a connection board with position fixing portions, a protection circuit module, and connecting taps with bridges that are inserted into these portions to ensure secure attachment, minimizing the risk of short circuits and misalignment by using a printed circuit board to connect unit cells in series, parallel, or series-parallel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connecting taps are used to electrically connect unit cells and connection board, then electrical connection is established, but misalignment and short circuits may occur
Solution Approach 1:
Position fixing portions are introduced as intermediary elements between the connecting taps and the connection board. These position fixing portions serve as mediators that guide the connecting taps into correct alignment positions, preventing misalignment and short circuits while maintaining reliable electrical connection
Solution Approach 2:
The connecting taps are designed with self-aligning features where the position fixing portions automatically guide them into the correct position during assembly. This self-service mechanism eliminates the need for high-precision manual alignment, reducing manufacturing precision requirements while ensuring connection reliability
2Power
If multiple unit cells are connected in series and/or parallel, then power and capacity are increased, but device complexity increases
Solution Approach 1:
The connection board is designed with universal position fixing portions that can accommodate multiple connecting taps in various configurations. This multi-functional design allows the same connection board structure to support series, parallel, or series-parallel connections of multiple unit cells, increasing power and capacity without proportionally increasing structural complexity
Solution Approach 2:
The connection structure is segmented into modular components: connection board, position fixing portions, and connecting taps. This segmentation allows each component to be independently designed and assembled, simplifying the overall complex connection structure while enabling flexible series and parallel configurations of multiple unit cells
Data Source
AI summary
A battery pack includes unit cells disposed side-by-side, a connection board connecting the unit cells in series and/or in parallel, the connection board including position fixing portions on a first surface, a protection circuit module electrically connected to the connection board, and a first connecting tap and a second connecting tap disposed on the connection board to electrically connect the unit cells and the connection board. At least one of the first connecting tap and the second connecting tap includes one end connected to the unit cells and an other end, the other end including a plurality of bridges at a lower side thereof. The bridges are inserted into the position fixing portions.