Hybrid Series Battery Module With Matched Electrode Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium-ion batteries have reached a development bottleneck, and sodium-ion and potassium-ion batteries, due to lower energy density and compatibility issues, are not suitable for industrial applications, leading to a need for improved battery modules that can complement lithium-ion batteries in terms of energy density, low-temperature performance, structural stability, safety, and manufacturability while reducing costs.
Innovation Solution
A hybrid series battery module is designed by arranging sodium-ion or potassium-ion battery cells with lithium-ion battery cells, where the interlayer spacing of the negative electrode active material in the sodium-ion or potassium-ion cells is optimized to be greater than that in the lithium-ion cells, achieving a ratio within a specific range to enhance compatibility and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sodium-ion or potassium-ion battery cells are arranged in hybrid series with lithium-ion battery cells, then low-temperature performance and structural stability are improved, but compatibility and coordination problems arise between different chemical systems
Solution Approach 1:
The patent applies parameter changes by optimizing the interlayer spacing of the negative electrode active material in sodium-ion or potassium-ion battery cells to be greater than that in lithium-ion battery cells, with the ratio d1/d2 falling within a specific range (≥1.005 and ≤1.600). This parameter adjustment ensures compatible swelling forces between different battery cell types during charge-discharge cycles, resolving compatibility issues while maintaining structural stability in hybrid series configurations.
2Use of energy by moving object
If lithium-ion batteries are used to meet energy density requirements, then energy density is improved, but development bottleneck and rising costs occur
Solution Approach 1:
The patent merges lithium-ion battery cells with sodium-ion or potassium-ion battery cells in a hybrid series configuration. This combination allows the system to achieve the required energy density through lithium-ion cells while incorporating sodium-ion or potassium-ion cells that offer lower cost and good low-temperature performance, thus reducing overall manufacturing costs while meeting energy density requirements.
Solution Approach 2:
The patent creates a composite battery system by integrating different battery chemistries (lithium-ion and sodium-ion or potassium-ion) into a single hybrid module. This composite approach leverages the advantages of each battery type: high energy density of lithium-ion and cost-effectiveness plus low-temperature performance of sodium-ion/potassium-ion, achieving both performance and cost optimization.
3Ease of manufacture
If sodium-ion or potassium-ion battery cells are used to reduce costs, then manufacturing cost is reduced, but energy density performance deteriorates
Solution Approach 1:
The patent combines sodium-ion or potassium-ion battery cells (lower cost) with lithium-ion battery cells (higher energy density) in a hybrid series configuration. This merging allows the system to achieve the required overall energy density by including high-energy-density lithium-ion cells, while the inclusion of lower-cost sodium-ion or potassium-ion cells reduces the average manufacturing cost compared to using only lithium-ion cells.
Data Source
AI summary
A hybrid series battery module includes a first-type battery cell including a first negative electrode plate and a second-type battery cell including a second negative electrode plate. Energy density of the first-type battery cell is less than energy density of the second-type battery cell. A first interlayer spacing of a negative electrode active material of the first negative electrode plate is greater than a second interlayer spacing of a negative electrode active material of the second negative electrode plate. In a state of charge of 0%, a ratio of the first interlayer spacing to the second interlayer spacing falls within a range of greater than or equal to 1.005 and less than or equal to 1.600.