Solid-State Battery Cell Layout for Rigid Electrolyte Packaging
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Solution Overview
Problem
Solid state electrolyte battery cells are difficult to fit into conventional cylindrical shapes due to their stiffness and brittleness, limiting their packaging options to pouch cells.
Innovation Solution
A battery design featuring an elongated container with a longitudinal wall and stacked battery units, each comprising an anode, cathode, and solid electrolyte, arranged in a hexagonal packing pattern to accommodate varying widths and contact edges with the container walls, allowing for a stable and efficient packaging solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid state electrolyte battery cells are made with conventional cylindrical shape, then packaging efficiency is improved, but the stiffness and brittleness of solid electrolyte make it difficult to fit
Solution Approach 1:
The battery cell is divided into multiple battery units stacked together, where each unit contains an anode, cathode, and solid electrolyte. This segmentation allows the rigid solid electrolyte components to be manufactured separately and then assembled into the final cylindrical configuration, overcoming the difficulty of fitting solid electrolyte into cylindrical shapes while maintaining high packaging efficiency.
Solution Approach 2:
The patent transitions from traditional two-dimensional pouch cell layout to a three-dimensional stacked configuration within a cylindrical container. Multiple battery units are stacked along the longitudinal axis of the cylinder, utilizing the vertical dimension to achieve high packaging density while accommodating the rigid solid electrolyte components through careful dimensional design.
2Ease of manufacture
If solid state electrolyte battery cells use pouch cell shape, then ease of fitting solid electrolyte is improved, but packaging efficiency and structural integrity deteriorate
Solution Approach 1:
The patent adopts a cylindrical (curved) container shape instead of flat pouch cell configuration. The cylindrical form factor provides superior structural integrity and space utilization compared to flat pouches, while the internal stacking arrangement of battery units accommodates the rigid solid electrolyte components through optimized dimensional design.
3Adaptability or versatility
If battery units have varying widths, then adaptability to container shapes is improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements varying widths of battery units at different positions within the stack. End battery units have different dimensions compared to intermediate units, allowing optimized contact with the cylindrical container walls and improved overall packing efficiency. This local variation in dimensions enhances adaptability to the curved container shape while maintaining manageable manufacturing complexity through standardized modular design.
Data Source
AI summary
A battery includes an elongated container including at least one elongated wall extending in a longitudinal direction between a first end wall and a second end wall; and a plurality of battery units stacked inside of the container along a stacking direction that intersects the at least one elongated wall. Each battery unit includes an anode, a cathode and a solid electrolyte between the anode and the cathode. Each battery unit has a length in the longitudinal direction, a thickness in the stacking direction and a width in a lateral direction. The longitudinal direction and the lateral direction are perpendicular to the stacking direction.