Probe-Integrated Battery Degassing for Cylindrical Cell Gas Removal
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Solution Overview
Problem
Conventional methods for degassing cylindrical secondary batteries are inefficient, costly, and require complex structures, leading to increased time and effort, and there is a risk of performance deterioration due to gas accumulation.
Innovation Solution
A cylindrical secondary battery degassing device that uses a vacuum suction module integrated with a charging-and-discharging probe pin to suction and discharge gas generated during charging and discharging processes, with the option of a central or off-center gas outlet configuration and an alignment unit for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate complicated structure is used for gas collection, then gas can be collected, but the device complexity increases and time/efforts/costs are excessively required
Solution Approach 1:
The patent combines the gas collection function with the existing charging/discharging probe pin structure. The vacuum suction module is integrated into or moves along with the probe pin, merging two functions (charging/discharging and gas collection) into a single integrated system, thereby reducing device complexity while maintaining gas collection capability
Solution Approach 2:
The probe pin structure is given multiple functions: it serves both for electrical charging/discharging operations and for gas collection through the integrated vacuum suction module. This multi-functionality eliminates the need for separate gas collection structures, reducing overall device complexity
2Reliability
If a separate complicated structure is used for gas collection, then gas can be collected, but time and efforts are excessively required
Solution Approach 1:
By merging gas collection with the charging/discharging process through the integrated vacuum suction module, the patent enables simultaneous gas removal during normal battery operations, eliminating the need for separate degassing steps and reducing total time required
Solution Approach 2:
The vacuum suction module is positioned and ready to collect gas during the charging/discharging process itself, performing gas removal in advance before gas accumulation becomes problematic, rather than requiring a separate post-processing degassing step
3Productivity
If conventional lithium secondary battery is used, then high energy density and long cycle life are achieved, but ignition/explosion risk occurs at high temperature
Solution Approach 1:
The patent converts the harmful effect of gas generation (which causes swelling and potential explosion) into a beneficial outcome by implementing the vacuum suction module to actively remove gas during charging/discharging. The gas that would otherwise be harmful is now collected and discharged, preventing swelling and ignition risks while maintaining the high energy density benefits
4Stability of the object's composition
If gas is not discharged, then battery structure is maintained, but performance deterioration and swelling occur
Solution Approach 1:
The vacuum suction module operates continuously or periodically during the charging/discharging process to remove gas as it is generated, maintaining continuous gas removal action. This prevents gas accumulation that would lead to swelling and performance deterioration, while preserving the battery's structural integrity
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
Improves manufacturing efficiency, prevents performance deterioration, and reduces time and costs associated with degassing by effectively removing gas through a vacuum suction module aligned with the battery's electrodes.
Implementation Method 1
a vacuum suction module movable along with the charging-and-discharging probe pin, connected to a gas outlet of the cylindrical secondary battery, and configured to suction and discharge gas generated inside the cylindrical secondary battery during charging and discharging processes
Data Source
AI summary
A cylindrical secondary battery degassing device, in particular, a cylindrical secondary battery degassing device in which gas generated during charging and discharging processes of a cylindrical secondary battery is suctioned and discharged through a vacuum suction module moving along with a charging-and-discharging probe pin being in contact with electrodes of the cylindrical secondary battery to charge and discharge the cylindrical secondary battery, thereby improving a process efficiency in manufacturing the cylindrical secondary battery, preventing the performance deterioration of the cylindrical secondary battery, and reducing time, efforts and costs for the degassing.