Secondary Battery Degassing with Piercing and Suction Sealing
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Solution Overview
Problem
Secondary batteries swell during charging/discharging due to gas generation, leading to reduced efficiency.
Innovation Solution
A degassing device with a piercing unit and gas discharge unit that pierces the battery to form an opening hole and removes gas through suction, followed by sealing the hole to prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary battery is charged and discharged, then the battery is activated and becomes usable, but gas is generated causing swelling and reduced efficiency
Solution Approach 1:
The patent applies the principle of converting harm into benefit by transforming the harmful gas generated during charging/discharging into a manageable byproduct. A gas discharge unit is introduced that actively removes the gas through suction, converting the harmful swelling effect into a controlled gas removal process. This allows the battery to undergo charging/discharging cycles while maintaining structural integrity and efficiency.
2Shape
If gas is removed from the battery, then swelling is prevented and efficiency is improved, but the battery structure is compromised
Solution Approach 1:
The patent applies preliminary action by performing gas discharge operations at specific stages during the battery manufacturing and activation process. The gas discharge unit is positioned and activated in advance to remove gas before it causes significant swelling or structural damage. This proactive approach prevents deformation while maintaining structural integrity, rather than attempting to repair damage after it occurs.
Solution Approach 2:
The gas discharge unit acts as an intermediary between the battery interior and exterior environments. It provides a controlled pathway for gas removal through suction, mediating the pressure differential and preventing direct structural compromise. The unit includes components like a suction hole and discharge passage that facilitate gentle, controlled gas extraction without damaging the battery pouch or internal structure.
3Object-generated harmful factors
If a gas discharge unit is added to the battery, then gas can be removed effectively, but the device complexity increases
Solution Approach 1:
The gas discharge unit is designed with multi-functionality to reduce overall device complexity. The same unit that performs gas discharge also includes sealing capabilities through the sealing unit, and can be integrated with existing battery manufacturing equipment. The discharge passage and suction mechanism serve multiple purposes including gas removal, pressure equalization, and structural support during the degassing process.
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
Effectively reduces gas within the battery, preventing swelling and improving charging/discharging efficiency.
Implementation Method 1
a piercing member (112) piercing the one side of the first surface of the secondary battery (1), which is sealed by the piercing body (111), to form an opening hole (1a)
Implementation Method 2
a gas discharge member (122) discharging the gas within the secondary battery (1) to the outside through the opening hole (1a)
Implementation Method 3
wherein the opening hole (1a) is sealed by a sealing unit (130) to prevent the secondary battery (1) from being deformed
Data Source
Figure 1
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Figure 3
AI summary
A degassing device of the present invention comprises: a piercing unit comprising a piercing body disposed on one surface of the secondary battery to seal one side of the one surface of the secondary battery and a piercing member piercing the one side of the one surface of the secondary battery, which is sealed by the piercing body to form an opening hole; and a gas discharge unit comprising a gas discharge body disposed on the other surface of the secondary battery to seal one side of the other surface of the secondary battery, in which the opening hole is formed, and a gas discharge member discharging the gas within the secondary battery to the outside through the opening hole that is sealed by the gas discharge body, wherein the piercing member forms the opening hole passing from the one side of the one surface to the one side of the other surface of the secondary battery.