Flexible Envelope Battery Conductive Sealing Structure
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Solution Overview
Problem
Conventional flexible-envelope type batteries face challenges with limited current conduction due to small cross-section areas of conductive rivets and are prone to stress corrosion and electrolyte leaks, with complex and costly assembly processes.
Innovation Solution
A flexible-envelope type battery with an electrically conductive sealing structure using a conductive terminal and fixed member with a clamp component, eliminating the need for rivets and allowing direct contact for current conduction, featuring a bottom board and protruding block within the flexible envelope, and a clamp component for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conductive rivets are used to connect internal leads and external leads, then electric current can be conducted from inside to outside the battery, but the cross-section area of the rivets limits the current conduction capability
Solution Approach 1:
The patent merges the sealing function and current conduction function into a single integrated sealing structure. The conductive sealing structure combines the sealing member and conductive terminal, eliminating the need for separate conductive rivets and enabling larger current conduction area while maintaining sealing effectiveness.
2Reliability
If conductive rivets are subjected to constant pressure over long periods to seal holes, then sealing effectiveness is improved, but stress corrosion occurs in the rivets
Solution Approach 1:
The patent segments the sealing function and current conduction function into separate components within the integrated sealing structure. The sealing member handles the sealing function without bearing electrical current, while the conductive terminal handles current conduction, eliminating stress corrosion in the conductive pathway.
3Reliability
If conventional assembling methods with welding and multiple components are used, then reliable electrical connections can be achieved, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent combines multiple functions (sealing, current conduction, and electrical connection) into a single integrated sealing structure, eliminating the need for separate welding operations and multiple components, thereby simplifying the assembly process while maintaining reliable electrical connections.
Solution Approach 2:
The conductive sealing structure serves multiple functions simultaneously: it seals the hole in the flexible envelope, conducts electric current from internal to external leads, and provides mechanical support. This multi-functionality reduces the number of components and assembly steps required.
4Adaptability or versatility
If multiple components including conductive rivets, sealing parts, and welding materials are used, then functional requirements can be met, but production cost increases
Solution Approach 1:
The integrated conductive sealing structure performs multiple functions (sealing, current conduction, mechanical support) in a single component, reducing the total number of parts needed and eliminating the need for specialized welding materials and procedures, thereby reducing production costs while maintaining functional capabilities.
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 solution enhances current conduction area, prevents stress corrosion and electrolyte leaks, simplifies the assembly process by eliminating the need for welding, and reduces production costs, thereby improving battery quality and market competitiveness.
Implementation Method 1
The electrically conductible sealing structure conducts an electric current in direct contact with the electrode pair
Implementation Method 2
The fixed member is for tightly fixing the flexible envelope and the conductive terminal
Implementation Method 3
the anodic collecting electrode 111 and cathodic collecting electrode 111′ are combined with the internal lead 130a and 130b by welding or fusing
Data Source
AI summary
A flexible-envelope type battery and an electrically conductible sealing structure thereof and an assembling method thereof are provided. The battery includes an electrode pair, a flexible envelope and a pair of electrically conductible sealing structures. Each sealing structure includes a conductive terminal and a fixed member. The conductive terminal includes a bottom board and a protruding block, for conducting an electric current from the electrode pair to the outside. The bottom board is disposed within the flexible envelope and combined with the electrode pair. The protruding block is disposed on the bottom board for passing through and protruding from an upper surface of the flexible envelope. The fixed member is for tightly fixing the flexible envelope and the conductive terminal.