Battery Cell End Cap Flow Channel for Electrolyte Injection
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Solution Overview
Problem
The existing battery cell technology faces challenges in efficiently injecting electrolyte solution due to low injection efficiency through the liquid injection hole, which can lead to incomplete infiltration and potential damage to the electrode assembly.
Innovation Solution
The battery cell design incorporates an end cap with a first convex part that includes a flow guiding channel, allowing the electrolyte solution to flow laterally and improve injection efficiency by communicating with the liquid injection hole and penetrating the outer peripheral surface, ensuring sufficient infiltration of the electrolyte solution into the electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrolyte solution is injected through the liquid injection hole in conventional battery cells, then the electrolyte solution can enter the battery cell, but the injection efficiency is low and the flow smoothness is poor
Solution Approach 1:
The end cap is divided into a cap body and a separate first convex part. The first convex part is provided with a flow guiding channel that segments the flow path of the electrolyte solution, guiding it to flow smoothly from the liquid injection hole to the outer peripheral surface, thereby improving both injection efficiency and flow smoothness.
Solution Approach 2:
The flow guiding channel acts as an intermediary structure between the liquid injection hole and the electrode assembly. It mediates the flow of electrolyte solution, directing it along a predetermined path to improve flow smoothness and injection efficiency while protecting the electrode assembly from direct impact.
2Productivity
If electrolyte solution is injected directly into the battery cell, then injection can be performed, but the injection efficiency is low and infiltration is incomplete
Solution Approach 1:
The flow guiding channel extends in the radial direction from the liquid injection hole to the outer peripheral surface, adding a dimensional pathway for electrolyte solution flow. This radial flow path improves injection efficiency and ensures complete infiltration of the electrode assembly by distributing the electrolyte solution uniformly.
3Manufacturing precision
If electrolyte solution flows directly to the electrode assembly, then infiltration can occur, but the risk of damage to the electrode assembly increases
Solution Approach 1:
The first convex part with the flow guiding channel serves as a cushioning structure that absorbs and distributes the flow energy of the injected electrolyte solution before it reaches the electrode assembly. This prevents direct high-velocity impact on the electrode assembly, reducing damage risk while ensuring complete infiltration.
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
This design enhances the smoothness and efficiency of electrolyte solution flow, improving the infiltration effect and reducing the risk of damage to the electrode assembly during the injection process, thereby increasing the overall efficiency and reliability of the battery cell.
Implementation Method 1
the flow guiding channel is configured for allowing at least part of the electrolyte solution to flow to outside of the outer peripheral surface
Data Source
AI summary
A battery cell may include an electrode assembly, a housing and an end cap. The electrode assembly may have a first tab. The housing may have an opening for receiving the electrode assembly. The end cap may include a cap body and a first convex part. The end cap may be provided with a liquid injection hole, and the liquid injection hole may be located inside of the outer peripheral surface of the first convex part. The first convex part may be provided with a flow guiding channel, the flow guiding channel may communicate with the liquid injection hole and penetrate the outer peripheral surface, and the flow guiding channel may be used for allowing at least part of the electrolyte solution to flow to outside of the outer peripheral surface.