Rechargeable Battery Short-Circuit Member for Inversion Plate Protection
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Solution Overview
Problem
Rechargeable batteries face safety risks due to potential damage from short-circuits, which can lead to fires or explosions when internal pressure exceeds critical values, as existing designs lack effective mechanisms to prevent inversion plate damage during such events.
Innovation Solution
Incorporating a short-circuit member between the inversion plate and the connection plate, which is designed to form a current path when the internal pressure increases, triggering a short-circuit that melts a fuse part to interrupt charging or discharging and prevent further risk, thereby enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional battery structure without a short-circuit member is used, then the device complexity is reduced, but the reliability deteriorates due to potential inversion plate damage from short-circuits
Solution Approach 1:
A short-circuit member is introduced as an intermediary component between the inversion plate and connection plate. This member includes a support part positioned on the inversion plate and a body part extending through a short-circuit hole to contact the connection plate, creating a controlled current path that prevents uncontrolled short-circuit damage to the inversion plate.
Solution Approach 2:
The short-circuit member is pre-positioned in the battery structure before any fault occurs. The support part is initially positioned on the inversion plate surface, and the body part extends through the short-circuit hole, establishing a ready-made protective mechanism that activates automatically when short-circuit conditions arise, preventing inversion plate damage before it occurs.
2Reliability
If the short-circuit member is designed with a body part height greater than the distance to the connection plate, then the reliability is improved by ensuring contact, but the device complexity increases
Solution Approach 1:
The body part of the short-circuit member is designed with a specific height parameter that exceeds the distance from the inversion plate to the connection plate. This dimensional parameter ensures that when the support part is positioned on the inversion plate, the body part automatically reaches and contacts the connection plate, guaranteeing reliable electrical contact without requiring additional adjustment mechanisms.
3Object-affected harmful factors
If no short-circuit protection mechanism is provided, then the manufacturing precision requirements are reduced, but the object-affected harmful factors increase due to short-circuit risks
Solution Approach 1:
The short-circuit member acts as a pre-positioned protective cushion between the inversion plate and connection plate. The support part is designed to be positioned on the inversion plate surface, and the body part extends through the short-circuit hole to contact the connection plate, creating a controlled current path that cushions against uncontrolled short-circuit currents and prevents thermal runaway or explosion.
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 prevents inversion plate damage and enhances safety by ensuring that a short-circuit is triggered before critical conditions lead to fires or explosions, thereby improving the overall safety of the rechargeable battery.
Implementation Method 1
When the internal pressure of the rechargeable battery reaches a critical value, the round portion of the inversion plate may protrude toward the short-circuit member to upwardly push the short-circuit member
Implementation Method 2
After the short-circuit member comes into contact with the connection plate, a current path ranging from the cap plate to the connection plate may be formed
Implementation Method 3
triggering a short-circuit that melts a fuse part to interrupt charging or discharging
Data Source
AI summary
A rechargeable battery includes an electrode assembly in a case, and a cap assembly coupled to the case, the cap assembly having a cap plate sealing the case, the cap plate including a short-circuit hole and a conductive groove surrounding the short-circuit hole, an inversion plate in the conductive groove of the cap plate, a connection plate covering the short-circuit hole of the cap plate, and a short-circuit member between the connection plate and the inversion plate, the short-circuit member at least partially passing through the short-circuit hole and contacting the connection plate.