Secondary Battery Insulator With Elastic Buffer Protrusions
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Solution Overview
Problem
Secondary batteries face durability issues due to impacts and vibrations applied to the electrode assembly, leading to potential separation of electrode tabs and abnormal operations.
Innovation Solution
An insulator with a buffer part featuring protrusions made of elastic materials like polybutylene terephthalate, polypropylene, or rubber, which are distinct from the body part, is designed to absorb external impacts and vibrations, minimizing the stress on the electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid insulator is used to ensure electrical insulation, then insulation performance is improved, but impact resistance deteriorates causing electrode assembly damage under vibration and external impact
Solution Approach 1:
The insulator is constructed as a composite structure combining a rigid body part (providing electrical insulation) with an elastic buffer part (absorbing impact). This composite design allows the insulator to simultaneously achieve electrical insulation performance and impact resistance, resolving the contradiction between rigid insulation and flexible shock absorption.
Solution Approach 2:
The elastic buffer part is pre-installed on the insulator to provide cushioning before impact occurs. When external impact or vibration is applied, the buffer part deforms elastically to absorb the shock, preventing direct transmission of impact forces to the electrode assembly and thus protecting it from damage.
2Reliability
If the insulator directly contacts the electrode assembly to ensure insulation, then insulation effectiveness is improved, but vulnerability to impact increases
Solution Approach 1:
The insulator combines a rigid body part for maintaining insulation contact with the electrode assembly and an elastic buffer part for absorbing impact forces. This composite structure allows the insulator to remain in contact with the electrode assembly for effective insulation while the buffer part protects against impact damage.
Solution Approach 2:
The insulator uses materials with different mechanical properties (rigid vs. elastic) in different parts. The body part uses rigid material for insulation stability, while the buffer part uses elastic material with high elongation and recovery properties to change its deformation characteristics under impact, allowing it to absorb shock while maintaining contact.
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 insulator effectively reduces the impact on the electrode assembly, enhancing the durability of secondary batteries by absorbing external shocks and maintaining electrical insulation.
Implementation Method 1
The buffer part may be made of a material having elasticity. The buffer part may include polybutylene terephthalate, polypropylene, perfluoroalkoxy, or a rubber material.
Data Source
AI summary
An insulator for a secondary battery and a secondary battery including the insulator are disclosed. According to one aspect, an insulator for a secondary battery includes: a body part configured to define a body; and a buffer part adhering to a top surface of the body part, wherein the buffer part includes a plurality of protrusions that protrude upward, and the body part is made of a material different from that of the buffer part.