Secondary Battery Terminal Vision Hole for Weld Contact Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing secondary batteries face challenges in ensuring proper weldability and close contact between components, which affects the overall performance and reliability of the battery pack.
Innovation Solution
The secondary battery design includes specific features such as vision holes in terminals and connection members to allow for precise marking and measurement of contact points, enabling improved close contact and weldability through the use of pointers and measuring devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional battery components are assembled without vision holes, then the assembly process is simpler and faster, but the weldability and close contact between components cannot be properly ensured
Solution Approach 1:
The vision hole allows optical detection (similar to color/visual change detection) of the marking point position on the connection member, enabling verification of close contact through visual observation of the marking point through the terminal body
Solution Approach 2:
The vision hole acts as an intermediary that allows the marking point to be observed indirectly through the terminal body, enabling measurement of close contact without direct access to the connection interface
2Manufacturing precision
If vision holes are added to terminals for marking and measurement, then weldability and close contact are improved, but the terminal structure becomes more complex
Solution Approach 1:
The terminal body is segmented by adding a vision hole, which divides the terminal structure into distinct functional zones: the main terminal body for electrical connection and the vision hole region for measurement and verification
Solution Approach 2:
The vision hole is added locally to the terminal body only where needed for measurement purposes, while the rest of the terminal structure maintains its original design for electrical functionality, applying the measurement feature only where required
3Measurement precision
If marking points are used to measure close contact, then measurement precision is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The marking point is applied in advance to the connection member before assembly, establishing a reference position that will be visible through the vision hole after assembly, allowing measurement to be performed without additional manufacturing steps
Solution Approach 2:
The marking point serves dual purposes: it acts as both a visual indicator for close contact verification and a measurement reference, allowing the same feature to perform multiple functions in the measurement process
Data Source
AI summary
A secondary battery, a battery pack including the same, and a method of manufacturing the same are disclosed. A secondary battery includes a case, an electrode assembly in the case and including a first electrode and a second electrode, a first tab member connected to the first electrode and extending in a first direction from the electrode assembly, a cap assembly facing the electrode assembly and including a first terminal and a second terminal, and a first connection member between the electrode assembly and the cap assembly and connected to the first terminal and the first tab member, and the first terminal includes a first vision hole to allow a marking point of the first connection member to be generated and identified.