Secondary Battery Reverse Plate Short-Circuit Mechanism
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Solution Overview
Problem
Existing secondary battery short-circuiting mechanisms fail to reliably maintain the electrical connection between the positive and negative electrode terminals after deformation of the reverse plate due to internal pressure reduction, leading to a loss of the short-circuited state.
Innovation Solution
Incorporating a fixing member made of an elastically deformable material that supports the reverse plate in its deformed state, ensuring the electrical connection between the positive and negative electrode terminals is maintained by exiting the through hole and being fixed in the communication space, even when internal pressure is reduced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reverse plate deforms to short-circuit the electrode terminals, then the electrical connection between terminals is achieved, but the short-circuited state cannot be maintained when internal pressure is reduced
Solution Approach 1:
The fixing member acts as an intermediary component between the reverse plate and the electrode terminals. When the reverse plate deforms under internal pressure, the fixing member is pushed out from the through-hole and comes into contact with the electrode terminals, thereby maintaining the short-circuited state even after pressure reduction. This intermediary mechanism solves the problem of maintaining electrical connection stability.
2Reliability
If the reverse plate is used alone for short-circuiting, then the structure is simple, but the short-circuited state is lost when pressure is reduced
Solution Approach 1:
The fixing member serves multiple functions: it acts as a support structure for the reverse plate, a mechanical actuator that pushes out under pressure, and an electrical conductor that maintains the short-circuited state. This multi-functionality allows the system to achieve reliable short-circuit maintenance without significantly increasing overall structural complexity.
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 maintains the short-circuited state between the electrode terminals, preventing the reverse plate from returning to its original shape and ensuring the secondary battery remains discharged and protected against overcharging.
Implementation Method 1
The fixing member is formed to include an elastically deformable material, and coupled to the reverse plate while being inserted into the through hole
Implementation Method 2
The reverse plate deforms in response to the increased internal pressure in the communication space, to thereby electrically connect the first electrode terminal and the second electrode terminal
Data Source
AI summary
A secondary battery includes a reverse plate formed using a conductive material and provided in a case, and a fixing member formed using an elastically deformable material and joined to the reverse plate. When an internal pressure in the case is increased, the reverse plate deforms in response to the internal pressure, to thereby electrically connect a positive electrode terminal and a negative electrode terminal. With the increase in the internal pressure, the fixing member elastically deforms from a state where it is inserted into the through hole, exits the through hole and is fixed between the reverse plate and the case. The reverse plate in the deformed state is supported by the fixed fixing member.