Laminated Solid-State Battery Side Connections for Higher Capacity Density
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Solution Overview
Problem
Existing batteries with laminated current collectors and active substance layers have low capacity density due to gaps between end portions of laminated battery cells.
Innovation Solution
A battery design featuring a power-generation element with laminated battery cells connected in parallel, and a connection member with a conductive base material and insulating members to extend electrodes from the side surfaces, reducing the volume of the extension portion and increasing the effective power generation volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If electrodes are extended from side surfaces of battery cells to increase effective volume, then capacity density is improved, but gaps between end portions of laminated battery cells cause low capacity density
Solution Approach 1:
The patent merges the battery cells by filling the gaps between end portions with connection members, creating a continuous structure. The connection members are inserted into the gaps to join adjacent battery cells, eliminating void spaces and achieving dense packing that maximizes the effective volume for power generation.
Solution Approach 2:
The patent extends electrodes from side surfaces in addition to the traditional top-bottom configuration. This multi-dimensional electrode arrangement increases the effective volume contributing to power generation by utilizing the lateral dimensions of the battery cells, thereby improving capacity density.
2Reliability
If connection members are added to connect battery cells and extend electrodes, then manufacturing complexity increases, but the structure becomes more robust
Solution Approach 1:
The connection members serve multiple functions simultaneously: they connect adjacent battery cells to eliminate gaps, extend electrodes from side surfaces to increase effective volume, and provide structural support. This multi-functionality reduces the need for separate components and simplifies the overall manufacturing process.
Solution Approach 2:
The battery is divided into modular laminated battery cells that can be independently manufactured and then assembled. This segmentation allows for standardized production of individual cells with connection members, simplifying the manufacturing process while maintaining robustness through precise modular assembly.
Data Source
AI summary
A battery of the present disclosure includes: a power-generation element including a plurality of laminated battery cells connected electrically in parallel, each battery cell including an electrode layer, a counter-electrode layer, and a solid electrolyte layer; and a first connection member connected to a side surface of the power-generation element, the first connection member includes a first base material having a first surface facing the side surface and a first conductive member located on the first surface and electrically connected to the electrode layers, and one or more first insulating members are located so as to cover the counter-electrode layers on the side surface.