Fixing Member for Energy Storage Terminal Connection Stability
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Solution Overview
Problem
Energy storage devices face issues with connection loosening between terminals or current collectors and conductive members due to unstable welding, leading to increased electric resistance and reduced energy storage performance over time.
Innovation Solution
Incorporating a fixing member made of a plate body with bent portions that joins the terminal or current collector to the conductive member, providing a stable connection and preventing loosening caused by vibrations or impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the terminal or current collector and conductive member are directly welded to each other, then the connection is simple and manufacturing is easy, but the welding portion has unstable shape causing connection loosening under vibrations or impact
Solution Approach 1:
A fixing member is introduced as an intermediary component between the terminal/current collector and the conductive member. The fixing member has a first portion that contacts the terminal or current collector and a second portion that contacts the conductive member, mediating the connection between these two components. This intermediary structure provides stable contact surfaces for welding while protecting the conductive member's swaged portion from direct welding, thereby preventing connection loosening under vibrations or impact while maintaining ease of manufacture.
2Device complexity
If direct welding is used between terminal/current collector and conductive member, then the device structure is simple, but the unstable welding portion increases electric resistance over time
Solution Approach 1:
The fixing member serves as an intermediary that provides stable welding surfaces. The first portion of the fixing member contacts the terminal or current collector with a stable geometry suitable for welding, and the second portion contacts the conductive member. This intermediary structure ensures reliable electrical connection by preventing the conductive member's swaged portion from being directly welded, thereby maintaining low electric resistance over time while adding minimal complexity to the device structure.
3Ease of manufacture
If the conductive member is swaged to connect terminal/current collector, then the connection method is simple, but the bent portion has unstable shape leading to connection loosening
Solution Approach 1:
The fixing member is positioned between the terminal/current collector and the swaged portion of the conductive member. The swaged portion (bent portion) of the conductive member maintains its simple formation for ease of manufacture, while the fixing member's first portion provides a stable contact surface that distributes mechanical stresses. This intermediary structure prevents the unstable bent portion from directly contacting the terminal, thereby maintaining connection stability under vibrations or impact while preserving the simple manufacturing process.
Data Source
AI summary
An energy storage device includes: a container; a terminal disposed outside the container or a current collector disposed inside the container; a conductive member penetrating the container and connected to the current collector or the terminal; and a fixing member joining the current collector or the terminal and the conductive member to each other.