Battery Cell Impedance Jig With Constant Wire Tension
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Solution Overview
Problem
Existing charging and discharging jigs for measuring battery cell impedance face challenges in maintaining consistent electric wire length and tension, leading to inaccurate impedance measurements due to variations in wire length and tension.
Innovation Solution
A charging and discharging jig design that includes a fixed block and a movable block with electric wires fixed to both blocks, featuring loops around rods to adjust wire length and tension, ensuring consistent measurements despite jig length variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the charging and discharging jig is displaced in the length direction to measure various battery cells, then the adaptability to different battery types is improved, but the electric wire length and tension vary causing measurement precision to deteriorate
Solution Approach 1:
The patent implements a dynamic wire length adjustment mechanism where the electric wire is divided into multiple sections that can be selectively connected or disconnected. As the jig displaces to accommodate different battery sizes, the system dynamically adjusts the effective wire length by engaging or disengaging wire sections, thereby maintaining consistent wire tension and measurement precision across various battery types.
Solution Approach 2:
The patent changes the physical parameters of the electric wire system by introducing adjustable wire length and tension control mechanisms. This includes using springs or elastic elements to maintain constant wire tension, and employing movable connection points that adjust wire length based on the battery cell dimensions, thus resolving the contradiction between adaptability and measurement precision.
2Ease of operation
If the electric wire tension varies due to jig displacement, then the ease of operation is improved, but the measurement precision deteriorates due to noise increase
Solution Approach 1:
The patent introduces an intermediary mechanism (such as a spring-loaded tensioner or elastic element) between the electric wire and the measurement system. This intermediary component absorbs tension variations caused by jig displacement, maintaining constant wire tension during operation while allowing free movement of the jig, thus preserving both ease of operation and measurement precision.
3Adaptability or versatility
If the electric wire length changes during measurement, then the adaptability to different battery sizes is improved, but the measurement precision deteriorates due to external magnetic field variations
Solution Approach 1:
The patent implements a dynamic wire length adjustment mechanism where the electric wire is divided into multiple sections that can be selectively connected or disconnected. As the jig displaces to accommodate different battery sizes, the system dynamically adjusts the effective wire length by engaging or disengaging wire sections, thereby maintaining consistent wire tension and measurement precision across various battery types.
Data Source
AI summary
A charging and discharging jig for measuring an impedance of a battery cell includes: a fixed block including a first charging/discharging bus bar on an upper surface of a first side of the fixed block; a movable block slidably coupled to the fixed block, the movable block including a second charging/discharging bus bar on an upper surface of a second side of the movable block opposite to the first side of the fixed block; a moving block slidably coupled to a bottom surface of the fixed block; and electric wires fixed to the first side of the fixed block and the second side of the movable block, the electric wires being configured to extend along the bottom surface of the fixed block and a bottom surface of the movable block.