Battery Formation Exhaust Nozzle Spacing to Prevent Electrolyte Loss
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Solution Overview
Problem
Existing battery formation systems face the challenge of preventing electrolyte loss during the battery formation process, as high negative pressure is required to discharge generated gas, leading to electrolyte being drawn out of the battery housing.
Innovation Solution
A formation system comprising a clamp, a suction nozzle, and a negative pressure source, where the suction nozzle is positioned at a preset distance from the liquid injection hole to collect formation exhaust gas without directly entering the battery, thereby preventing electrolyte loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If high negative pressure is applied inside the battery to discharge generated gas in real time, then gas discharge efficiency is improved, but electrolyte loss occurs due to electrolyte being drawn out of the housing
Solution Approach 1:
A suction nozzle is introduced as an intermediary component between the battery housing and the negative pressure source. The nozzle is positioned at a preset distance from the liquid injection hole, creating a controlled interface that allows gas to be extracted while preventing electrolyte from being drawn out. This intermediary structure mediates the conflict between gas discharge requirements and electrolyte preservation.
Solution Approach 2:
The harmful gas is extracted separately from the battery housing through the suction nozzle without applying high negative pressure directly inside the housing. By taking out the gas through a dedicated extraction channel (the nozzle positioned at a distance), the system avoids the need to create high negative pressure within the housing that would cause electrolyte loss.
2Object-generated harmful factors
If high negative pressure is maintained inside the battery during formation, then gas discharge is improved, but SEI film formation is affected
Solution Approach 1:
The suction nozzle serves as an intermediary that enables gas discharge without creating high negative pressure inside the battery housing. By positioning the nozzle at a preset distance from the liquid injection hole and using it as a dedicated gas extraction point, the system allows gas to be removed while maintaining a relatively normal pressure environment inside the housing that is suitable for SEI film formation.
3Productivity
If the suction nozzle is positioned close to the liquid injection hole to effectively collect gas, then gas collection efficiency is improved, but electrolyte may be drawn out
Solution Approach 1:
The key parameter controlled is the distance between the suction nozzle and the liquid injection hole. By optimizing this distance to a preset value, the system achieves a balance where the nozzle is close enough to effectively collect gas (maintaining good gas collection efficiency) but far enough to prevent electrolyte from being drawn out. This parameter optimization resolves the contradiction between collection efficiency and electrolyte protection.
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 system effectively prevents electrolyte loss by maintaining a normal pressure environment within the battery, ensuring proper SEI film formation and improving battery operation performance, while also simplifying the negative pressure system and reducing costs.
Implementation Method 1
the negative pressure source being connected to the suction nozzle to provide negative pressure environment for the suction nozzle
Data Source
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AI summary
The embodiments of the present application relate to the technical field of battery production, and disclose a formation system, comprising a clamp, a suction nozzle, and a negative pressure source, the clamp being used to clamp a battery, the suction nozzle being disposed corresponding to a liquid injection hole of the battery to collect formation exhaust gas from the battery, and the negative pressure source being connected to the suction nozzle to provide negative pressure environment for the suction nozzle, wherein there is a preset distance between the suction nozzle and the liquid injection hole of the battery to prevent electrolyte in the battery from being drawn out. The formation system according to the embodiments of the present application can prevent the loss of electrolyte caused by the electrolyte inside the battery being drawn out of a housing.