Secondary Battery Cap Plate Layout for Better Electrolyte Injection
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Solution Overview
Problem
Existing secondary batteries face challenges in improving liquid injectability, particularly in elongated designs, due to limitations in electrolyte injection and air suction methods.
Innovation Solution
The secondary battery design includes dual liquid injection holes, one for electrolyte injection and one for air suction, positioned at different heights and sizes, with insulating members to prevent short-circuits, allowing controlled electrolyte flow and vacuum formation for enhanced injectability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single liquid injection hole is used in the cap plate, then the structure is simple, but the liquid injectability is insufficient
Solution Approach 1:
The single liquid injection hole is divided into multiple liquid injection holes (first liquid injection hole and second liquid injection hole) positioned at different locations in the cap plate. This segmentation allows electrolyte to be injected from multiple points simultaneously, significantly improving liquid injectability and reducing injection time while maintaining structural feasibility
2Stability of the object's composition
If liquid injection holes are positioned at different heights, then uniform electrolyte distribution is improved, but the device complexity increases
Solution Approach 1:
Different liquid injection holes are positioned at different heights and locations in the cap plate, with each hole having optimized local characteristics. The first liquid injection hole is positioned at a first height while the second liquid injection hole is positioned at a second height, allowing electrolyte to be injected at different levels to achieve uniform distribution throughout the battery cell
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 improves electrolyte injection efficiency and prevents premature discharge, ensuring uniform distribution and effective vacuum formation, enhancing the liquid injectability and reducing battery deterioration.
Implementation Method 1
the first liquid injection hole is configured to inject an electrolyte into the can
Implementation Method 2
the second liquid injection hole is configured to suction air from the inside of the can
Data Source
AI summary
An embodiment of the present invention relates to a secondary battery, and a technical object of the present invention for solving the above problem is to provide a secondary battery capable of improving liquid injectability.For this, the present invention discloses a secondary battery including: an electrode assembly comprising a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate; a can having ends that are opened to left and right sides and provided with a space therein to accommodate the electrode assembly; a first cap plate configured to seal the left end of the can; a second cap plate configured to seal the right end of the can; a first terminal installed on the first cap plate so as to be electrically connected to the first electrode plate; a second terminal installed on the second cap plate so as to be electrically connected to the second electrode plate; a first liquid injection hole defined in the first cap plate; and a second liquid injection hole defined in the second cap plate.