Secondary Battery Insulating Plate Structure for Gas Pressure Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Secondary batteries face challenges in safely discharging gases at high temperatures without structural failure due to high-pressure buildup.
Innovation Solution
Incorporating an insulating plate with gas discharge holes and a polyimide tape, where the tape has gas moving holes, to manage and disperse gas pressure, preventing the insulating plate from breaking and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas discharge holes are added to the insulating plate, then gas discharge capability is improved, but structural strength deteriorates
Solution Approach 1:
The insulating plate is designed with different properties in different regions: the first region (peripheral portion) maintains high strength and heat resistance to support structural integrity, while the second region (central portion) contains gas discharge holes to enable harmful gas pressure release. This local differentiation allows the plate to simultaneously withstand structural loads and discharge gases effectively.
Solution Approach 2:
The insulating plate incorporates gas discharge holes in the second region, transforming a solid structure into a partially porous one. This allows the plate to selectively pass gases while maintaining mechanical strength in other areas, resolving the contradiction between gas discharge capability and structural integrity.
2Weight of stationary object
If the insulating plate is made thinner to reduce weight, then manufacturing cost is reduced, but resistance to high-temperature gas pressure deteriorates
Solution Approach 1:
The insulating plate employs regional differentiation where the first region (peripheral portion) has greater thickness to provide structural support and heat resistance, while the second region (central portion) is thinner and contains gas discharge holes. This allows weight reduction in the central area while maintaining strength where needed.
Solution Approach 2:
The insulating plate is divided into two distinct regions with different thicknesses and functions. The segmented design allows optimization of each region for its specific purpose: structural support in the first region and gas discharge in the second region, achieving both weight reduction and reliability.
3Reliability
If a tape is added to the lower portion of the insulating plate, then safety is improved by adjusting gas pressure, but device complexity increases
Solution Approach 1:
A tape is introduced as an intermediary component attached to the lower portion of the insulating plate. This tape acts as a pressure-regulating element that prevents excessive gas pressure buildup, enhancing safety without requiring complex control systems or additional active components.
Solution Approach 2:
The tape serves as a simple, sacrificial safety component that can be easily replaced if needed. This inexpensive element provides critical pressure regulation functionality without adding significant complexity to the overall battery structure.
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 design effectively prevents insulating plate rupture from high-temperature, high-pressure gases, increasing the safety and stability of the secondary battery by dispersing gas pressure through the gas discharge and moving holes.
Implementation Method 1
a plurality of gas discharge holes are located in a region of an insulating plate corresponding to a vent, thereby easily preventing an insulating plate from being broken due to high-temperature, high-pressure gases
Data Source
AI summary
The present invention provides a secondary battery including an insulating plate which enables easy gas discharge and is not broken at high temperature. For this purpose, disclosed is a secondary battery comprising: a case including a space therein through an opening; at least one electrode assembly inserted into the space of the case; an insulating plate formed at an upper part of the electrode assembly; and a cap plate which is coupled to the opening of the case and includes a vent, at least one region of which has a thinner thickness than other regions, wherein the insulating plate includes a plurality of gas discharge holes disposed at a region corresponding to the vent.