Cap Plate Insulator Structure for Redirecting Battery Electrolyte Flow
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Solution Overview
Problem
The injection of electrolyte at high pressure through the electrolyte injection port in secondary batteries can cause damage to the electrode assembly due to direct spraying, which is exacerbated by thinner separators and increased battery capacity.
Innovation Solution
An insulator with a barrier and input space is positioned between the cap plate and electrode assembly, redirecting the electrolyte path to prevent direct impact on the electrode assembly and reducing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrolyte is injected at high pressure through the electrolyte injection port to speed up production, then productivity is improved, but the electrode assembly may be damaged due to direct spraying
Solution Approach 1:
The insulator with barrier acts as an intermediary component between the electrolyte injection port and the electrode assembly. The barrier portion of the insulator intercepts the electrolyte flow path, causing the electrolyte to change direction and enter through the side surface of the insulator rather than directly impacting the electrode assembly, thus protecting it from high-pressure damage while maintaining injection speed
2Quantity of substance
If the separator is made thinner to increase battery capacity, then the battery capacity is improved, but the electrode assembly becomes more vulnerable to electrolyte spray damage
Solution Approach 1:
The insulator with barrier serves as a protective intermediary that redirects electrolyte flow away from the thinner separator and electrode assembly, preventing direct high-pressure spray impact that would be more damaging to thinner separators
Solution Approach 2:
The insulator structure segments the electrolyte flow path into two stages: first through the barrier portion that changes the flow direction, then through the side surface entry path, preventing direct linear impact on the electrode assembly
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 solution effectively reduces or prevents damage to the electrode assembly by deflecting the electrolyte flow and minimizing backflow, enhancing production efficiency and safety.
Implementation Method 1
a barrier configured to change a path of an electrolyte injected through the electrolyte injection port of the cap plate
Implementation Method 2
an input space for guiding the electrolyte whose path is changed by the barrier to be input into the electrode assembly
Data Source
AI summary
A cap plate insulator and a secondary battery including the same are provided, with cap plate insulator being positioned between a cap plate and an electrode assembly and structured to prevent an electrolyte injected through the electrolyte injection port from directly spraying onto the electrode assembly. To this end, there is provided a secondary battery that includes an electrode assembly, a case for accommodating the electrode assembly therein, a cap plate including a terminal and an electrolyte injection port, and an insulator positioned between the electrode assembly and the cap plate, with the cap plate including a barrier configured to change a path of an electrolyte injected through the electrolyte injection port and an input space for guiding the electrolyte to be input into the electrode assembly.