Rechargeable Battery Short-Circuiting Member Cap Plate
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Solution Overview
Problem
Rechargeable batteries face safety concerns due to potential fires or explosions from excessive internal pressure and are prone to moisture damage, with existing safety devices increasing battery volume and being vulnerable to moisture.
Innovation Solution
A rechargeable battery design incorporating a short-circuiting member with a conductive holder, shrinkable ball, and spring, which is coupled to a cap plate and collector plate, allowing for internal pressure-controlled short-circuiting and moisture protection, efficiently utilizing internal space without adding volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety device is added to prevent fires or explosions from excessive internal pressure, then battery safety is improved, but battery volume increases
Solution Approach 1:
The safety device is merged with the existing cap plate structure by forming the short-circuiting groove directly on the cap plate, integrating the safety function into the sealing component rather than adding a separate device, thereby preventing volume increase
Solution Approach 2:
The cap plate serves dual functions: sealing the battery case and housing the short-circuiting groove for safety protection, making one component perform multiple functions to avoid additional volume
2Reliability
If a safety device is added to control internal pressure, then battery safety is improved, but the device becomes vulnerable to moisture damage
Solution Approach 1:
The short-circuiting member is nested within the cap plate structure, with the groove formed on the cap plate itself, placing the safety device inside the sealed battery case where it is protected from external moisture
Solution Approach 2:
The cap plate acts as an intermediary structure that protects the short-circuiting groove from external moisture while allowing the safety device to function internally, separating the safety component from harmful external environment
3Volume of moving object
If a short-circuiting member is integrated into the cap plate, then battery volume is optimized, but device complexity increases
Solution Approach 1:
The short-circuiting member is segmented into simple geometric components (groove, ball, spring) that can be easily manufactured and assembled, reducing complexity despite the integrated design
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 battery fires or explosions by short-circuiting when internal pressure exceeds a threshold, while maintaining moisture protection and optimizing internal space usage.
Implementation Method 1
a shrinkable ball coupled to the upper groove to shrink according to an internal pressure of the rechargeable battery
Implementation Method 2
a spring coupled to the lower groove and having an elasticity
Data Source
AI summary
A rechargeable battery, which can improve safety, control operating level of a short-circuiting member, prevent external moisture from being induced to a short-circuiting member to cause a short-circuit, and can efficiently utilize an internal space. In an embodiment, the rechargeable battery includes an electrode assembly, a collector plate electrically connected to the electrode assembly, a case housing the electrode assembly and the collector plate, a cap plate sealing the case and having a short-circuiting groove formed at a lower portion thereof, and a short-circuiting member formed between the cap plate and the collector plate, wherein the short-circuiting member is coupled to the short-circuiting groove of the cap plate.