Battery Pack Shell Venting Structure to Block Foam Glue Overflow
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Solution Overview
Problem
Existing battery pack cases lack a glue blocking structure, leading to foam glue overflow that blocks the explosion-proof portion and exhaust structure, compromising safety by preventing gas discharge during thermal runaway.
Innovation Solution
A battery pack case design featuring a tray, mounting bracket, and glue blocking plates that define a glue filling area, with an exhaust passage to prevent foam glue overflow and ensure gas discharge during thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If foam glue is filled between battery cells without a glue blocking structure, then the battery cells are securely fixed, but the foam glue overflows and blocks the explosion-proof portion and exhaust structure
Solution Approach 1:
The accommodating cavity is divided into a glue filling area and a non-glue filling area using the mounting bracket and glue blocking plates. This segmentation prevents foam glue from overflowing into the exhaust passage area while still allowing adequate glue filling to secure the battery cells, thus resolving the contradiction between fixing stability and preventing harmful blocking
Solution Approach 2:
The mounting bracket and glue blocking plates act as intermediary structures that define the boundaries of the glue filling area. These intermediaries guide the foam glue confinement, ensuring it remains in the designated area and does not block the exhaust structure, while still providing sufficient fixing stability
2Stability of the object's composition
If foam glue overflows the glue filling area, then the battery cells are over-secured, but the safety is reduced due to blocked gas discharge pathways
Solution Approach 1:
By segmenting the cavity into glued and non-glued areas, the invention ensures that foam glue provides adequate fixing stability within the glue filling area while preventing overflow that would block gas discharge pathways, thus maintaining reliability during thermal runaway events
Solution Approach 2:
The glue blocking plates are pre-installed to prevent foam glue from reaching the exhaust structure before thermal runaway occurs. This preliminary anti-action ensures that even if excessive glue is applied, the safety pathway remains clear for gas discharge during thermal runaway
3Ease of manufacture
If no glue blocking structure is used, then the manufacturing process is simpler, but the foam glue blocks critical components reducing safety
Solution Approach 1:
The mounting bracket serves dual functions: it mounts the battery cells and simultaneously acts as a glue blocking structure by defining the glue filling area. This merging reduces the number of separate components needed while ensuring safety, thus improving ease of manufacture without compromising reliability
Data Source
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AI summary
A battery pack shell, a battery pack and an electric device. The battery pack shell comprises a tray (1), which is internally provided with an accommodating cavity (10); a mounting support (2), which is mounted in the accommodating cavity (10); and a first foam blocking plate (3) and a second foam blocking plate (4), which are positioned in the accommodating cavity (10) and are both mounted on the mounting support (2), wherein the first foam blocking plate (3), the second foam blocking plate (4), the mounting support (2) and the tray (1) jointly define a foam filling area (5); and a first exhaust channel (2a) is formed on the side of the mounting support (2) facing away from the foam filling area (5), and an outlet of the first exhaust channel (2a) is positioned outside the foam filling area (5).