Rechargeable Battery Protection Element Integration
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Solution Overview
Problem
Rechargeable batteries face issues with overcharge and over-discharge during repeated charging and discharging, leading to performance deterioration and potential damage, as existing solutions do not effectively stabilize the connection between protection circuit boards and electrodes.
Innovation Solution
A rechargeable battery design that includes a protection element and protection circuit board electrically connected through a cap plate, with a support member for stable fixation, reducing the need for additional components and enhancing electrical insulation, thereby preventing overcharge and over-discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection circuit board is added to prevent overcharge and over-discharge, then battery safety is improved, but device complexity increases
Solution Approach 1:
The protection circuit board is integrated with the cap plate through the protection element, merging two separate components into a unified structure. The protection element serves as both an electrical connector and a mechanical coupling component, eliminating the need for separate mounting brackets or additional fastening mechanisms.
Solution Approach 2:
The protection element performs multiple functions simultaneously: it provides electrical connection between the protection circuit board and cap plate, serves as a mechanical coupling component, and enables welding or alternative coupling methods. This multi-functionality reduces the overall number of components needed in the battery assembly.
2Stability of the object's composition
If additional components are used to stabilize the connection between protection circuit board and electrodes, then connection stability is improved, but device complexity increases
Solution Approach 1:
The protection element combines electrical connection and mechanical stabilization functions into a single component. By integrating these functions, the patent achieves stable connection without requiring additional support brackets, fasteners, or mounting components that would otherwise be needed.
Solution Approach 2:
The protection element inherently provides both electrical connection and mechanical stability through its own structure. The element's design allows it to self-stabilize the connection between the protection circuit board and cap plate without requiring external support structures or additional components to maintain positional stability.
3Strength
If welding is used to couple the protection element with the cap plate, then connection strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent provides multiple coupling options for the protection element, including welding, coupling members, or other methods. This flexibility allows manufacturers to choose the most appropriate method based on production capabilities, material properties, and cost considerations, making the manufacturing process adaptable rather than fixed.
Solution Approach 2:
The coupling method can be changed by adjusting manufacturing parameters such as selecting different fastening mechanisms (welding vs. mechanical coupling members). The protection element's design accommodates various coupling approaches, allowing manufacturers to optimize for ease of manufacture while maintaining adequate connection strength through parameter selection rather than structural modification.
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 stabilizes the connection between the protection circuit board and electrodes, preventing overcharge and over-discharge, thus enhancing the battery's performance and longevity by reducing the risk of gas generation and heat buildup.
Implementation Method 1
the protection element electrically coupling a second electrode of the electrode assembly with the protection circuit board
Implementation Method 2
A rechargeable battery design that includes a protection element and protection circuit board electrically connected through a cap plate, with a support member for stable fixation
Data Source
AI summary
A rechargeable battery including a case in which an electrode assembly is accommodated; a cap plate coupled with the case; a protection circuit board coupled with the cap plate, the protection circuit board being electrically connected with a first electrode of the electrode assembly; and a protection element coupled with the cap plate, the protection element electrically coupling a second electrode of the electrode assembly with the protection circuit board.