Cylindrical Cell Pickup With Flexible Voltage Sensing for Sorting
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Solution Overview
Problem
Existing battery cell sorting apparatuses are not suitable for cylindrical battery cells, as they cannot stably measure voltages due to the shape and design, leading to inefficiencies in sorting and voltage deviation during secondary battery manufacturing.
Innovation Solution
A cylindrical battery cell sorting apparatus using a battery cell pickup member with magnets and a pad-type flexible printed circuit board voltage measurement unit, allowing for stable voltage measurement and sorting by set zone voltage value, utilizing electromagnetic forces to lift and position cells for accurate sorting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a lifting plate or electrode needle is used for voltage measurement, then the measurement structure is simple, but the measurement reliability deteriorates when the lifting plate is curved or electrode needle is bent
Solution Approach 1:
The patent uses a flexible printed circuit board (FPC) as the voltage measurement member, which can bend and deform along with the lifting plate without compromising measurement reliability. The FPC maintains electrical contact with the battery cell terminals even when curved, solving the problem of measurement failure due to deformation while keeping the structure relatively simple.
2Adaptability or versatility
If pouch-shaped battery cell sorting apparatus is used, then the sorting function is achieved, but the apparatus cannot be directly applied to cylindrical battery cells
Solution Approach 1:
The patent designs a sorting apparatus that can handle both pouch-shaped and cylindrical battery cells by making the voltage measurement member flexible and the lifting plate adaptable to different cell geometries. The FPC-based measurement system can conform to various cell shapes, providing universal applicability while maintaining manufacturing efficiency.
3Stability of the object's composition
If voltage measurement is performed with bent electrode needle or curved lifting plate, then the structure accommodates deformation, but electrode contact is lost and voltage cannot be measured
Solution Approach 1:
The flexible printed circuit board maintains electrical conductivity and measurement capability even when bent or deformed, ensuring continuous contact with battery cell terminals throughout the lifting and sorting process. This eliminates measurement failure due to structural deformation.
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
Enables reliable sorting of cylindrical battery cells by set zone voltage value, minimizing voltage deviation and improving productivity by simultaneously moving and measuring battery cells, thus enhancing the manufacturing efficiency of secondary batteries.
Implementation Method 1
a magnet (120) located at the lower surface of the pickup body portion (110), the magnet being configured to lift the battery cell (B)
Data Source
AI summary
Discussed is a battery cell sorting apparatus including a battery cell pickup member configured to move a battery cell to a desired position; and a guide member configured to guide the battery cell pickup member in a first direction, wherein the battery cell pickup member includes: a pickup body portion, a magnet located at a lower surface of the pickup body portion, the magnet being configured to lift the battery cell, and a voltage measurement unit located at a lower surface of the magnet, the voltage measurement unit being configured to measure a voltage of the battery cell.