Battery Composite Plate for Vibration Isolation and Volume Compensation
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Solution Overview
Problem
Batteries experience failure and short circuits due to tab fractures and electrode plate displacement caused by shaking during transportation or vibration, leading to safety risks and reduced service life.
Innovation Solution
A composite plate with an elastic layer and insulation layer is inserted between the battery cell and the housing, preventing shaking and tab-related failures, while maintaining electrical isolation and accommodating volume changes during cycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the battery cell is tightly fitted in the housing, then the stability is improved, but the tabs are prone to fracture and electrode plates may displace during vibration
Solution Approach 1:
The patent applies beforehand cushioning by placing a buffer structure between the battery cell and the housing before vibration occurs. This buffer structure absorbs shock and prevents direct contact between the battery cell and housing during vibration, thereby preventing tab fracture and electrode plate displacement while maintaining battery cell stability.
2Reliability
If a buffer structure is added between the housing and battery cell, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent employs a flexible buffer structure made of elastic material that can deform to accommodate battery cell expansion and contraction during charge-discharge cycles. This thin film approach provides protection against vibration damage while maintaining structural simplicity and avoiding excessive complexity in the battery design.
3Reliability
If the buffer structure is rigid, then the protection against vibration is improved, but the volume compensation for battery cell expansion is reduced
Solution Approach 1:
The patent utilizes parameter changes by employing an elastic buffer material that changes its physical state between compressed and relaxed forms. During vibration, the buffer maintains rigidity to provide protection, while during battery cell expansion, it becomes more compliant to allow volume compensation, thus resolving the contradiction between protection and adaptability.
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 composite plate enhances safety and service life by preventing short circuits and tab failures, and increases energy density by allowing elastic compensation for volume changes.
Implementation Method 1
the first elastic layer is elastic. Therefore, the first elastic layer can be compressed when the battery cell expands during cycles, thereby releasing a space
Implementation Method 2
an insulation layer located on a surface of the first elastic layer... the insulation layer is located between the first elastic layer and the battery cell
Data Source
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AI summary
A battery includes a housing and a battery cell accommodated in the housing. A gap exists between the housing and the battery cell. The battery further includes a composite plate. The composite plate is located in the gap. The composite plate includes a first elastic layer and an insulation layer located on a surface of the first elastic layer. This application prevents the battery cell from shaking in the housing, compensates for volume loss of the battery cell caused by the use of the composite plate, and increases an energy density of the battery.