Adjustable Battery Cell Test Probe Mechanism for Variable Terminal Spacing
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Solution Overview
Problem
The existing battery cell OCV testing process is inefficient when dealing with battery cells of different dimensions, as the spacing between electrode terminals varies, requiring constant adjustments of testing probes, which reduces testing efficiency.
Innovation Solution
A battery cell testing probe mechanism with slidably connected test members along a connecting member, allowing for adjustable spacing to match different electrode terminal spacings, incorporating a slide rail mechanism for stability and a soft contact probe design to minimize damage during testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed spacing test members are used, then the structure is simple, but the adaptability to different battery cell dimensions is poor
Solution Approach 1:
The test member is designed with a slidable connection to the connecting member, allowing the spacing between test members to be dynamically adjusted according to different battery cell dimensions. This dynamic adjustment capability resolves the contradiction by enabling adaptability without requiring multiple fixed-structure devices for different cell types.
Solution Approach 2:
The testing device is segmented into a connecting member and multiple independently slidable test members. This segmentation allows each test member to be adjusted independently to match the specific spacing requirements of different battery cells, providing versatility while maintaining a relatively simple overall structure.
2Adaptability or versatility
If adjustable spacing test members are used, then the adaptability to different battery cell dimensions is improved, but the device complexity increases
Solution Approach 1:
The slidable connection mechanism provides a simple yet effective dynamic adjustment capability, allowing test members to move along the connecting member to accommodate different electrode terminal spacings. This approach achieves adaptability with minimal structural complexity.
Solution Approach 2:
The connecting member serves multiple functions: it provides structural support, enables sliding movement of test members, and accommodates various spacing configurations. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity.
3Reliability
If rigid probe contact is used, then the testing accuracy is high, but the wear and damage during testing increases
Solution Approach 1:
A buffer member is introduced between the probe and the electrode terminal to provide cushioning during contact. This beforehand cushioning reduces impact forces and wear while maintaining sufficient contact pressure for accurate testing, thereby improving reliability without increasing damage.
Solution Approach 2:
The buffer member changes the contact parameters by distributing the contact force over a larger area and reducing peak stresses. This parameter change allows for reliable electrical contact while minimizing mechanical wear and damage to both the probe and battery cell components.
Data Source
AI summary
Provided are a battery cell testing probe mechanism, a testing apparatus, and a battery production line. The battery cell testing probe mechanism includes a connecting member and multiple test members. The connecting member is configured to connect to an external structure, and at least one test member is slidably connected to the connecting member along a first direction. Each test member corresponds to an electrode terminal of a battery cell and performs relevant data collection on the corresponding electrode terminal. When battery cells of different dimensions are tested, one or more test members can be moved relative to the connecting member along the first direction to adjust spacings between the test members, thereby meeting the testing requirements for the spacing between electrode terminals of battery cells of different dimensions and improving testing efficiency.