Circuit Board Assembly With Li-Ion Pulse Output Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Circuit board assemblies for electronic devices, such as IoT devices, require compactness and high reliability with stable output, especially under conditions of repeated high-current pulse discharges, which existing technologies fail to achieve effectively.
Innovation Solution
A circuit board assembly with a lithium secondary battery and a wireless communication device, where the electrode area and battery resistance ratio (R/S) is adjusted to fall within a specific range (0.08≤R/S≤1.80 Ω/cm²), ensuring stable pulse output and cycle characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the battery size is reduced to achieve compactness, then the device size is reduced, but the output stability and durability under high-current pulse discharges deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the electrode area and battery resistance ratio (R/S ≤ 1.80 Ω/cm²) to achieve both compact size and stable output. By controlling the resistance-to-area ratio parameter, the invention enables small batteries to maintain good pulse discharge characteristics and cycle stability, resolving the contradiction between device compactness and output reliability
2Reliability
If the battery capacity is increased to improve output stability, then the output stability improves, but the device size increases
Solution Approach 1:
The patent uses parameter optimization to achieve high output stability in compact batteries. By controlling the electrode area and maintaining R/S ≤ 1.80 Ω/cm², the invention enables small batteries to deliver stable pulse discharge performance without increasing device size, effectively resolving the contradiction between output stability and compactness
3Ease of manufacture
If reflow soldering is used to fix the battery to the board, then the manufacturing process is simplified, but the battery performance is degraded due to high temperature heating
Solution Approach 1:
The patent addresses the thermal sensitivity issue by selecting battery components and configurations that maintain performance after reflow soldering. By optimizing the electrode structure and controlling the R/S ratio, the invention ensures that the battery can withstand reflow soldering temperatures while maintaining good cycle characteristics and pulse discharge performance
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
The solution provides a compact, durable, and high-output circuit board assembly with excellent pulse output and cycle characteristics, suitable for various applications, by optimizing the electrode area and battery resistance ratio.
Implementation Method 1
a lithium secondary battery including a positive electrode, a negative electrode arranged to face the positive electrode, and an electrolyte
Data Source
AI summary
A circuit board assembly includes a wiring board, the lithium secondary battery electrically connected to the wiring board, and a wireless communication device electrically connected to the wiring board. The lithium secondary battery includes a positive electrode, a negative electrode arranged to face the positive electrode, and an electrolyte. In the lithium secondary battery, an electrode area (S) and a battery resistance (R) satisfy a relationship of 0.08≤R/S≤1.80 (Ω/cm2), where the electrode area is an area where the positive electrode and the negative electrode face each other.