Swelling Aperture Cooling Plate for Battery CID Reliability
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Solution Overview
Problem
The operation reliability of a swelling current interrupt device (CID) embedded in a pouch cell within a vehicle is influenced by the size of the pouch cell, particularly its thickness, leading to restricted expansion and potential delay in swelling phenomena.
Innovation Solution
A battery system with a modified cooling plate structure that includes a swelling aperture and a swelling suppression part, allowing the CID to be mounted and enabling controlled expansion, thereby improving operation reliability regardless of pouch cell size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a pouch cell has a substantially thin thickness, then the cooling plate provides adequate cooling, but the swelling (e.g., expansion) thickness is restricted by the cooling plate
Solution Approach 1:
The cooling plate is segmented by introducing swelling apertures that allow the pouch cell to expand in specific localized regions. This segmentation enables the cooling plate to maintain its overall cooling function while creating designated zones where swelling can occur without restriction.
Solution Approach 2:
The cooling plate transitions from having uniform properties across its surface to having localized variations through the swelling apertures. These apertures create specific local regions where the plate's structural integrity is modified to permit controlled swelling, while the rest of the plate maintains its cooling effectiveness.
2Length of moving object
If a pouch cell has a substantially thick thickness, then substantial swelling space is present between the cooling plates, but a swelling delay phenomenon may occur
Solution Approach 1:
The swelling apertures are pre-formed in the cooling plate during manufacturing, creating predetermined pathways for expansion before any swelling event occurs. This preliminary preparation ensures that when swelling is needed, the pouch cell can expand immediately through the pre-established apertures rather than waiting for space to become available.
Solution Approach 2:
The swelling apertures act as intermediary structures that facilitate the transition from restricted to unrestricted swelling. These apertures serve as controlled intermediaries that guide the expansion process, ensuring reliable and timely swelling response while maintaining structural integrity.
3Adaptability or versatility
If the cooling plate structure is modified to improve CID operation reliability, then design flexibility is enhanced, but device complexity increases
Solution Approach 1:
The cooling plate is divided into functional zones through swelling apertures, creating distinct regions for cooling and controlled swelling. This segmentation allows the design to accommodate various pouch cell thicknesses and CID configurations, enhancing adaptability while maintaining a relatively simple overall 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 solution ensures consistent operation reliability of the CID across varying pouch cell thicknesses, preventing battery damage from over-charging or abnormal reactions by concentrating expansion at a specific portion, thus enhancing design flexibility and performance.
Implementation Method 1
the swelling aperture may induce an expansion of a pouch in which the swelling CID is embedded
Data Source
AI summary
A battery system improving operation reliability of a swelling current interrupt device (CID) is provided. The battery system includes a cooling plate that forms an appearance of a battery in which the swelling CID interrupting a current flow is mounted and includes a swelling aperture formed therein. The swelling aperture induces an expansion of a pouch in which the swelling CID is embedded. Therefore, since the swelling aperture is formed in the cooling plate, improved operation reliability of the swelling CID than a battery system according to related art in which operation reliability was varied based on a thickness of a pouch cell is obtained.