Battery Pack Vent Label for Controlled High-Pressure Gas Exhaust
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Solution Overview
Problem
Existing battery packs struggle with unpredictable exhaust positions and directions of high-pressure gas due to unlabeled exhaust holes, making it difficult to control the discharge effectively.
Innovation Solution
A battery pack design featuring a label with a predetermined rupture origin part and adhesive surface, allowing controlled exhaust of high-pressure gas through a designated exhaust hole, sealed by a double-sided tape for waterproofing and airtightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an exhaust hole is provided in the case to release high-pressure gas, then gas exhaust function is improved, but the exhaust position and direction cannot be controlled accurately
Solution Approach 1:
A label is pre-positioned and adhered to the exhaust hole before use. The label includes a predetermined rupture origin part that is designed to rupture at a specific location when pressure increases. This preliminary positioning ensures that when the safety valve opens and high-pressure gas is discharged, the label ruptures at the predetermined location, thereby controlling the exhaust position and direction accurately.
2Reliability
If a label is adhered to the exhaust hole to prevent foreign objects from entering, then sealing performance is improved, but the exhaust position becomes unpredictable when the label ruptures
Solution Approach 1:
The label is designed with non-uniform structure by providing a rupture origin part at a specific location. This creates local weakness at the rupture origin part, making it the predetermined rupture point when pressure increases. The rest of the label maintains sufficient strength for sealing, while the local rupture origin ensures predictable rupture position, thus resolving the contradiction between sealing performance and rupture position predictability.
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
Enables precise control over the exhaust position of high-pressure gas, enhancing safety by ensuring predictable and controlled discharge.
Implementation Method 1
a label that is adhered to a peripheral edge of the exhaust hole of the outer covering case to close the exhaust hole. The label includes an adhesive surface that is adhered to the outer covering case
Implementation Method 2
when high-pressure gas is discharged into the outer covering case from the safety valve, the rupture origin part of the label enables rupturing to start from the portion of the label in which the strength is intentionally decreased
Data Source
AI summary
A battery pack is provided which is capable of exhausting high-pressure gas from a desired position of a case. Battery pack includes: one or more secondary battery cells each of which includes an outer covering can with a safety valve; outer covering case that houses one or more secondary battery cells and includes a portion in which exhaust hole is provided for exhausting the high-pressure gas to outside when the safety valve of one of the one or more secondary battery cells is opened to exhaust the high-pressure gas; and label that is adhered to a peripheral edge of exhaust hole of outer covering case to close exhaust hole. Label includes an adhesive surface that is adhered to outer covering case, and the adhesive surface includes a portion in which rupture origin part is provided.