Power Storage Device Bus Bar Connection for Variable Cell Thickness
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Solution Overview
Problem
Existing power storage devices require varying shapes of current collector plates to accommodate changes in cell thickness, leading to increased costs.
Innovation Solution
A power storage device with a bus bar that electrically connects power storage cells, featuring protruding positive and negative electrode collector plates and a laminated film, allowing for commonality of shape among collector plates and accommodating changes in cell thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shape of current collector plates is varied to accommodate changes in cell thickness, then the power storage device can adapt to different output requirements, but the manufacturing cost increases due to the need for multiple plate shapes
Solution Approach 1:
The current collector plates are designed with a universal shape that can accommodate multiple cell thicknesses. The protrusions and recessions are configured to work with bus bars of different lengths, allowing the same plate design to be used across various power storage cell configurations without requiring shape variations.
Solution Approach 2:
The connection structure incorporates adjustable elements where bus bars can be positioned at different lengths to match varying cell thicknesses. The protrusions and recessions on the current collector plates work with this dynamic adjustment capability, allowing the electrical connection to be maintained across different thickness configurations without changing the plate shape.
2Ease of manufacture
If commonality of shape among current collector plates is maintained, then manufacturing cost is reduced, but the ability to accommodate changes in cell thickness is limited
Solution Approach 1:
The current collector plates are designed with a universal shape that can accommodate multiple cell thicknesses. The protrusions and recessions are configured to work with bus bars of different lengths, allowing the same plate design to be used across various power storage cell configurations without requiring shape variations.
Solution Approach 2:
The connection structure is segmented into modular components: the current collector plates with fixed protrusions, the bus bars with adjustable lengths, and the recessions that receive these components. This segmentation allows the plate shape to remain constant while the bus bar length varies to accommodate different cell thicknesses.
Data Source
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AI summary
A power storage device (10) includes power storage cells (101) and a bus bar (102). Each power storage cell (101) includes positive-electrode sheets (111), negative-electrode sheets (112), a positive-electrode current collector plate (120p), a negative-electrode current collector plate (120n), and a laminated film (130). The positive-electrode current collector plate (120p) includes a positive-electrode protrusion (121) shaped to protrude from the laminated film, and the negative-electrode current collector plate (120n) includes a negative-electrode protrusion (122) shaped to protrude from the laminated film. The power storage cells (101) are stacked such that the positive electrode protrusion (121) in one power storage cell and the negative-electrode protrusion (122) in another power storage cell adjacent to the one power storage cell face each other in the one direction. The bus bar (102) is shaped to extend in the one direction and connects the positive-electrode protrusion (121) to the negative-electrode protrusion (122).