All-solid-state battery charge control via light detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
All-solid-state batteries face challenges in preventing overcharge without increasing the number of non-power generating components, which can lead to reduced energy density, higher manufacturing costs, and decreased productivity.
Innovation Solution
Incorporating a light detection unit to monitor light emitted from the positive and negative electrode layers, allowing for early detection of overcharge events and controlled charge management through a charge control unit, thereby suppressing overcharge without adding non-power generating parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a decomposition additive and pressure-type current interruption mechanism are embedded in a lithium battery to prevent overcharge, then safety is improved, but the number of non-power generating parts increases
Solution Approach 1:
The patent extracts the overcharge prevention function from traditional mechanical components (decomposition additives and pressure-type current interruption mechanisms) and implements it through an optical detection system. The light detection unit monitors light emission from electrode layers to detect overcharge conditions, eliminating the need for decomposition additives and mechanical interruption mechanisms, thus reducing the number of non-power generating parts while maintaining safety.
Solution Approach 2:
The patent replaces mechanical overcharge prevention mechanisms (pressure-type current interruption) with an optical detection and control system. Instead of using mechanical deformation to interrupt current flow, the system uses light detection units to monitor electrode layers and controls charge/discharge currents electronically, substituting mechanical components with optical and electronic systems to reduce part count.
2Reliability
If decomposition additives are added to electrolytic solution to prevent overcharge, then safety is improved, but energy density is reduced
Solution Approach 1:
The patent removes decomposition additives from the electrolyte composition entirely. Instead of relying on these additives to provide overcharge protection, the system uses light detection units to monitor the electrode layers and detect overcharge conditions optically, eliminating the need for decomposition additives and preserving electrolyte composition for maximum energy density.
Solution Approach 2:
The patent replaces the chemical mechanism of decomposition additives with an optical detection mechanism. The light detection units monitor light emission from electrode layers during charge/discharge cycles, detecting overcharge conditions without requiring any chemical additives in the electrolyte, thus maintaining energy density while ensuring safety.
3Reliability
If multiple non-power generating parts are added to prevent overcharge, then safety is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates multiple non-power generating parts (decomposition additives, pressure-type current interruption mechanisms) from the battery system. The overcharge prevention function is achieved through light detection units and electronic control, which reduce the bill of materials and simplify manufacturing processes, thereby lowering manufacturing costs while maintaining safety.
Solution Approach 2:
The patent replaces complex mechanical and chemical overcharge prevention systems with a simplified optical detection and electronic control system. This substitution reduces the number of components requiring assembly, eliminates the need for specialized additives and mechanical mechanisms, and simplifies manufacturing processes, leading to reduced manufacturing costs.
4Reliability
If multiple non-power generating parts are added to prevent overcharge, then safety is improved, but productivity decreases
Solution Approach 1:
The patent removes multiple non-power generating parts (decomposition additives, current interruption mechanisms) from the battery assembly. This reduction in component count simplifies the assembly process, reduces assembly steps, and eliminates the need for specialized handling of sensitive components, thereby improving manufacturing productivity while maintaining safety through optical detection.
Solution Approach 2:
The patent replaces mechanical and chemical overcharge prevention systems with an optical detection system that integrates into the existing battery structure. This substitution eliminates complex assembly requirements for mechanical mechanisms and chemical additives, simplifying the manufacturing process and improving productivity without compromising safety.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents overcharge in all-solid-state batteries while maintaining energy density and reducing manufacturing costs by using a minimal number of components, thus prolonging battery life and enhancing safety.
Implementation Method 1
a light detection unit detecting light emitted from at least one of the positive electrode layer and the negative electrode layer
Data Source
AI summary
An all-solid-state battery system includes: an all-solid-state battery; a light detection unit; and a control unit. The all-solid-state battery includes a battery element having a positive electrode layer, a negative electrode layer and a solid electrolyte layer. The light detection unit detects light emitted from at least one of the positive electrode layer and the negative electrode layer. The control unit controls charge of the all-solid-state battery on the basis of intensity of light detected by the light detection unit.